CN109622872A - A kind of cold-heading molding technique of the eccentric flange nut with boss and its applied composable mold - Google Patents
A kind of cold-heading molding technique of the eccentric flange nut with boss and its applied composable mold Download PDFInfo
- Publication number
- CN109622872A CN109622872A CN201811571298.6A CN201811571298A CN109622872A CN 109622872 A CN109622872 A CN 109622872A CN 201811571298 A CN201811571298 A CN 201811571298A CN 109622872 A CN109622872 A CN 109622872A
- Authority
- CN
- China
- Prior art keywords
- molding
- blank
- kidney
- upsetting
- boss
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000465 moulding Methods 0.000 title claims abstract description 309
- 238000000034 method Methods 0.000 title claims abstract description 267
- 230000008569 process Effects 0.000 claims abstract description 198
- 238000004080 punching Methods 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 26
- 238000007493 shaping process Methods 0.000 claims abstract description 18
- 238000009966 trimming Methods 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 7
- 238000003786 synthesis reaction Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 21
- 238000009740 moulding (composite fabrication) Methods 0.000 description 41
- 239000000047 product Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- 238000005242 forging Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000003796 beauty Effects 0.000 description 2
- 210000002421 cell wall Anatomy 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 210000003734 kidney Anatomy 0.000 description 2
- 230000000116 mitigating effect Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 208000007623 Lordosis Diseases 0.000 description 1
- 241000233855 Orchidaceae Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/64—Making machine elements nuts
- B21K1/70—Making machine elements nuts of special shape, e.g. self-locking nuts, wing nuts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The cold-heading molding technique of the invention discloses a kind of eccentric flange nut with boss and its applied composable mold, cold-heading molding technique, including blanking, shaping and punching operation and the upsetting of the molding three times process and eccentric flange molding procedure that are sequentially arranged in after trimming；Molding upsetting process gradually forms positive flange section, hexagonal prismoid section and boss section to blank in three times three times, and the kidney-shaped counterbore successively deepened in blank form depth in three times and the kidney-shaped location hole successively deepened in blank form depth in three times；Positive flange section and hexagonal prismoid section and boss section are coaxial；Eccentric flange molding procedure is to carry out axial punching to positive flange section to form required eccentric flange section.The eccentric flange nut with boss is prepared by above-mentioned related art scheme, its simple process greatly improves production efficiency and stable production process, de- material conveniently, improve the service life of mold, flange face on molding eccentric flange nut it is uniformly beautiful, Product Precision is higher.
Description
Technical field
The present invention relates to the abnormity nut manufacturing technology fields that automobile uses, and in particular to a kind of eccentric flange with boss
The cold-heading molding technique of nut and its applied composable mold.
Background technique
Along with the development of auto manufacturing, high-quality, the demand of complicated special-shaped fastener are growing, after automobile
Lower swing arm eccentric nut is also increasingly urgent to as the load fastener on automobile, demand, the rear lower swing arms of automobiles bias spiral shell
Mother successively include along axial direction eccentric flange section, hexagonal prismoid section and boss section and its in axially penetrated through kidney slot；Traditional vapour
The preparation process of lower swing arm eccentric nut is to be welded by the hex nut with boss with gasket after vehicle, and wherein gasket constitutes institute
The eccentric flange section needed, but due to welding procedure existing defects itself, by the product of welding fabrication there are inner flow-lines not
Smooth, intensity deficiency problem；And since the size of required molding nut is usually smaller, the increase of welding sequence
The time that will cause processing inconvenience and required processing increases, and production efficiency is not high, unfavorable to the promotion of the productivity effect of enterprise.
In view of the above-mentioned problems, having occurred in industry is realized using gasket with the integrally formed technology mode of hex nut
Forging flow lines is complete, intensity is larger and the cold heading technique of eccentric flange nut high in machining efficiency, such as on 2 3rd, 2016 public affairs
Described in the Chinese invention patent application publication document CN105290300A of cloth a kind of chassis eccentric nut cold heading technique and
The mould structure of irregularly-shaped hole is formed, it is disclosed that stretchable holes are that type work is made in a upsetting in the cold heading technique of chassis eccentric nut
Skill, and disclosing its eccentric flange is that the molding technique of upsetting system, the technique have the following problems in three times: (1) its eccentric flange
It is therefore set for the eccentric for used punch die thimble opposed die set for straight forming, causes punch die thimble in upsetting system
During will receive biggish bending stress, be easy to cause punch die thimble the phenomenon that wearing and being broken occur；(2) cold-heading at
In type production process, the primary drawing and forming stretchable holes in 3rd station so that stretchable holes after formation blank to main mould top
The holding strength of needle is excessive, and therefore, when discharging, main mould thimble can not be easily detached from from blank, thus must be by being arranged
Ejector sleeve in main mould thimble periphery carries out ejection operation to blank, third step of the ejector sleeve in this application file to the 7th step
It is required to be arranged in each mold employed in rapid each step, and since the wall thickness of ejector sleeve is smaller, it is passed through in blank upper end
In the case where punch die thimble upsetting system, it is easy to appear swell, deform, crack or stuck etc. existing for ejector sleeve that blank lower end is supported
As, cause ejector sleeve can not normal use, while also will affect the function of main mould thimble, so that mold is easy to appear processing when production
Failure, leads to that the yield rate of product is low, production efficiency is lower；(3) there are blank differences during eccentric flange straight forming
The volume difference of position and the forging flow velocity difference in the radial direction of different parts, will lead to flange when squeezing, thereon future
It obtains and the part of flowing can squeeze out in the sidewall spacers between punch die thimble and type chamber, thus can be on the end face of flange of blank
The phenomenon that generating convex thorn not only results in flange and locally occurs losing material, but also the forging flow lines of flange can be made uneven, institute at
Intensity unevenness, flange cylindricity on flange on the nut of type everywhere is bigger than normal, influences the precision and quality of product.
Summary of the invention
It is an object of the invention to overcome the problems, such as drawbacks described above present in background technique or, provide a kind of with the inclined of boss
The cold-heading molding technique of heart flange nut and its applied composable mold pass through above-mentioned relevant technical solution preparation band boss
Eccentric flange nut, simple production process, to greatly improve production efficiency and stable production process, de- material convenient, mentions
The high service life of mold, the flange face on the molding eccentric flange nut of institute is uniformly beautiful, and Product Precision is higher, and production is imitated
Beneficial good, the production requirement for the enterprise that is content with very little.
To reach above-mentioned purpose, the present invention adopts the following technical scheme:
A kind of cold-heading molding technique of the eccentric flange nut with boss, through there is kidney-shaped in the eccentric flange nut
Hole, and the boss section of the eccentric flange section including being set gradually along axial direction, hexagonal prismoid section and cylinder；The cold-heading molding work
Skill includes process: blanking, shaping and punching；It is characterized in that: further including the upsetting work of molding three times after being sequentially arranged in trimming
Sequence and eccentric flange molding procedure；The upsetting process of molding three times gradually forms positive flange section, hexagonal prismoid to blank in three times
Section and boss section, and the kidney-shaped counterbore that coaxial form depth is successively deepened in one end that blank need to form eccentric flange section in three times
And the kidney-shaped location hole that coaxial form depth is successively deepened in one end that blank need to form boss section in three times；The positive flange
Section is coaxial with hexagonal prismoid section and boss section；The kidney-shaped location hole is used to position for rotation stop grafting；The eccentric flange molding
Process is to carry out axial punching to the positive flange section on blank to form required eccentric flange section.
Further, the first time molding upsetting process formed in upsetting process three times need to form eccentric flange section in blank
One end form round end, the diameter of the round end is positive 0.75-0.85 times of flange section diameter, and molding upsetting process for the first time
The depth of molding kidney-shaped counterbore and the difference in height of round end are within 0.2mm in round end；It is described to form in upsetting process three times
The round end of blank is shaped to pre- flange by second of molding upsetting process；The diameter difference of the pre- flange and positive flange section 2mm it
It is interior；The pre- flange forming of blank is the positive flange section by the third time molding upsetting process for forming upsetting process three times；Institute
The thickness difference of positive flange section and required molding eccentric flange section is stated within 0.2mm；First time molding upsetting, second at
The diameter difference of type upsetting and third time molding upsetting between each column type that the part that blank need to form boss section is separately formed exists
Within 0.15mm.
Further, the first time molding upsetting process forms circumferential equal in the part that blank need to form hexagonal prismoid section
Six trapezoidal faces of cloth and first boss is formed in the part that blank need to form boss section；Second of molding upsetting process
Pre- hexagonal prismoid is formed in the part of six circumferentially uniformly distributed trapezoidal faces of blank and is shaped at the first boss of blank
Two boss；The length of the second boss is greater than the length of first boss.
Further, the shaping and three times form upsetting process between further include location hole molding procedure, the location hole
Molding procedure is used to form the kidney-shaped location hole of blank in the first time molding upsetting for forming upsetting process three times.
Further, the first time formed in upsetting process three times forms upsetting process molding kidney-shaped counterbore on blank
Depth be third time form upsetting process depth of molding kidney-shaped counterbore on blank one third；It is described to form upsetting three times
The depth of second of molding upsetting process molding kidney-shaped counterbore on blank in process is third time molding upsetting process in blank
2/3rds of the depth of upper molding kidney-shaped counterbore；The depth for each kidney-shaped counterbore that molding upsetting process is separately formed three times
Error is within 0.2mm.
Further, the first time formed in upsetting process three times forms kidney-shaped location hole of the upsetting process on blank
Depth is the one third that third time forms upsetting process depth of molding kidney-shaped location hole on blank；It is described to form upsetting three times
The depth of second of molding upsetting process molding kidney-shaped location hole on blank in process is third time molding upsetting process in base
2/3rds of the depth of molding kidney-shaped location hole on material；Each kidney-shaped location hole that molding upsetting process is separately formed three times
The error of depth is within 0.2mm.
Further, the third time formed in upsetting process three times forms upsetting process molding kidney-shaped counterbore on blank
Depth it is equal with the height summation of positive flange section and hexagonal prisms section or difference 0.2mm within.
Further, the third time molding upsetting process formed in upsetting process three times molding kidney-shaped positioning on blank
The depth in hole is 1-2mm smaller than the height of boss section and forms upsetting process molding kidney-shaped counterbore depth on blank for third time
0.5-0.55 times.
Further, the blanking procedure is that the raw material after being straightened are cut into section, required length is made
The blank of line style.
Further, the trimming is that the resulting blank of blanking procedure is carried out upsetting system, at the both ends of blank point
Not Xing Cheng inner chamfer and outer chamfer, one end that blank is equipped with outer chamfer is one end for forming round end.
Further, the outer chamfer on blank includes the first chamfering and the second chamfering to connect；First chamfering
Both ends connect respectively with the end face of the second chamfering and blank, size be 15-25 °；The size of second chamfering is 45-
55°。
Further, together in the same process, punching operation is used for for the punching operation and eccentric flange molding procedure collection
Impacted to by forming the molding upsetting process of the third time in upsetting process molding kidney-shaped positioning hole on blank three times so that its with
Kidney-shaped counterbore connection on blank；The eccentric flange molding procedure molding eccentric flange Duan Yuzheng flange section of institute on blank
It is tangent.
A kind of composable mold of the cold-heading molding technique of the eccentric flange nut applied to as described above with boss, packet
The first mold set gradually, the second mold, third mold and the 4th mold are included, using as the molding three times set gradually
First time molding upsetting process, second of molding upsetting process, third time molding upsetting process and eccentric flange molding in upsetting process
The mould carrier of process.
Further, first mold includes the first type chamber, the first preshoot component and the first backlash stick；First type
Chamber which is provided with flange groove for forming outer wall shape needed for blank in first time molding upsetting process, flange groove it is straight
Diameter is greater than round end diameter；The first preshoot component is used to define with flange groove with round end described in synthesis type, and in round end
Kidney-shaped counterbore molding on blank needed for molding forms upsetting process for the first time；The first backlash stick is matched with the first type chamber rotation stop
It closes, end face is convexly equipped with first rear projection opposite with the first front projection, for matching with the kidney-shaped location hole rotation stop on blank
Close grafting.
Further, second mold includes second type chamber, the second pediment stick, the second backlash stick；The second type chamber
For forming outer wall shape needed for blank in second of molding upsetting process；Second pediment stick is towards second type chamber
One end is convexly equipped with the second front projection, to form molding kidney-shaped counterbore needed for blank in upsetting process for forming described second,
The height of second front projection is greater than the first front projection；The second backlash stick and second type chamber rotation stop cooperate, and end face is convexly equipped with
And height opposite with the second front projection is greater than the second rear projection of the first rear projection, for deepening the kidney-shaped location hole on blank
Depth.
Further, the third mold includes third type chamber, third preshoot component and third backlash stick；The third type
Chamber is for outer wall shape needed for forming the third time molding upsetting process blank；The end of the third front assembly is placed in third
Type is intracavitary to be convexly equipped with the third front projection towards third type chamber on the end face of the positive flange section on shaping blank and its end face, with
It is greater than second for forming molding kidney-shaped counterbore needed for blank, the height of third front projection in the third time molding upsetting process
Front projection；The third backlash stick and third type chamber rotation stop cooperate, and it is big that end face is convexly equipped with and height opposite with third front projection
In the third rear projection of the second rear projection, with the depth for deepening the kidney-shaped location hole on blank.
Further, the 4th mold includes the 4th type chamber, preshoot core pipe, the 4th backlash stick and ejector sleeve；Described 4th
Type chamber is equipped with eccentric grove, is shaped to the eccentric flange section axially to cut when positive flange section is placed in it；The preshoot
It is equipped with axially extending bore in core pipe, the offset for being adapted to and being placed in eccentric grove with eccentric grove is equipped with towards one end of the 4th type chamber
Portion, for pouring positive flange section in eccentric grove；The 4th backlash stick is used to towards in axially extending bore go out in partition blank
The part of kidney-shaped counterbore and kidney-shaped location hole；The ejector sleeve is sheathed on outside the 4th backlash stick, for by shaping blank ejection the
Four type chambers.
It further, further include the 5th mold and the 6th mold set gradually；5th mold is used for blanking, packet
Include quiet tool apron and can quiet tool apron sliding relatively moving knife seat；The quiet raw material of the tool apron positioning clamping through being straightened, the moving knife
Seat operation cutting raw material are to obtain the blank of required length；6th mold is used for shaping comprising plastic chamber and the 6th
Pediment stick, the plastic chamber are used for one end in blank and form outer chamfer；6th pediment stick is used for the other end in blank
Form inner chamfer.
Further, further include the 7th mold for forming location hole comprising positioning chamber and the 7th pediment stick；It is described
Positioning chamber is identical as plastic chamber, for forming the blank merging of inner chamfer and outer chamfer；7th pediment stick is equipped with direction
The kidney-shaped protrusion of positioning chamber is formed in the first time molding upsetting process needed for blank with forming one end of inner chamfer in blank
Molding kidney-shaped location hole.
By the above-mentioned description of this invention it is found that compared with the existing technology, have following of the present invention the utility model has the advantages that
1, the technical program is by using molding upsetting process three times gradually to form positive flange section, hexagonal in three times to blank
Prism section and boss section avoid mold once force-bearing excessive so that mold stress can evenly distribute, and therefore, can effectively mention
The service life of high mold；In addition, the form of point three one-step formings can also make positive flange section, hexagonal prismoid section and boss Duan Cheng
Saturation shape can be gradually shaped to during type from unsaturated shape, therefore, the molding positive flange section of institute, hexagonal prismoid section and
Boss section is more saturated and beauty；The molding of positive flange section occurs losing material phenomenon there is no flange face and edge, effectively increases
The precision of finished product is conducive to the production requirement for meeting enterprise；Kidney-shaped counterbore and kidney-shaped location hole also by point three steps gradually at
Type, can be to avoid stick absorption blank is rushed the case where, generate biggish enclasping force and can not be successfully to alleviate the blank stick that liquidates
The phenomenon that de- material, can further cancel the use of ejector sleeve in mold, avoid the occurrence of ejector sleeve and crack, deform, swelling or stuck
The case where, effectively increase the service life for rushing stick and mold.
2, axially punching forms the technology mode of eccentric flange section by using first forming after positive flange section, can make method
Orchid forging flow velocity at each position during type is made in upsetting is consistent, it is ensured that the molding flange saturation of institute does not lose material, outside
In sight be not present convex thorn phenomenon, improve molding positive flange section precision；It is easy to operate, meanwhile, avoid bias rush stick or
The design for rushing stick of unsymmetric structure reduces and rushes stick bending stress suffered during upsetting, avoid rushing stick occur abrasion and
The phenomenon that fracture.
3, the first time molding upsetting process formed three times in upsetting process is formed in one end that blank need to form eccentric flange section
There is a round end, and the diameter of round end is positive 0.75-0.85 times of flange section diameter, and molding upsetting process forms in round end for the first time
Kidney-shaped counterbore depth and round end difference in height within 0.2mm, the depth one-pass molding to avoid kidney-shaped counterbore it is too deep and
Reaming phenomenon is generated under by the radial pulling function of radial flange；Second of molding upsetting process in upsetting process is formed three times by base
The round end of material is shaped to pre- flange；The diameter difference of pre- flange and positive flange section is within 2mm, so that pre- flange periphery can approach
The phenomenon that generating reaming when abutting the side wall of the flange groove in mold, and then mitigating the molding of kidney-shaped counterbore；By will for the first time at
Type upsetting, second of molding upsetting and third time molding upsetting are between each column type that the part that blank need to form boss section is separately formed
Diameter difference control within 0.15mm so that boss section during upsetting three times, can follow constant-volume principle only
The variation on axial height is generated, to effectively improve the production precision of product.
4, by setting location hole moulding process, so that blank is carrying out positive flange section, hexagonal prismoid section and boss section
A kidney-shaped location hole is formed before upsetting system, so that blank can form rotation stop cooperation when first time forming upsetting with mold,
Blank opposing mold during upsetting is avoided to rotate and damage blank, stable production process, the precision of shaped article is more
It is high.
5, in the technical scheme, for the first time molding upsetting process on blank the depth of molding kidney-shaped counterbore be third
The one third of secondary molding upsetting process depth of molding kidney-shaped counterbore on blank；Second molding upsetting process on blank at
The depth of the kidney-shaped counterbore of type be third time molding upsetting process on blank the depth of molding kidney-shaped counterbore 2/3rds,
I.e. the kidney-shaped counterbore of final molding is by the identical upsetting depth process molding of depth three times, to evenly distribute the stress of blank and mold
Intensity, so that mold uniform force and once force-bearing intensity is not too big, effectively increases the yields of blank and making for mold
Use the service life.
6, in the technical scheme, for the first time the depth of kidney-shaped location hole of the molding upsetting process on blank be third time at
The one third of type upsetting process depth of molding kidney-shaped location hole on blank；Second of molding in upsetting process is formed three times
The depth of upsetting process molding kidney-shaped location hole on blank is the molding kidney-shaped positioning on blank of third time molding upsetting process
2/3rds of the depth in hole；Namely the kidney-shaped location hole of final molding is formed by the identical upsetting depth process of depth three times, with
The stress intensity of blank and mold is evenly distributed, so that mold uniform force and once force-bearing intensity is not too big, effectively improves
The yields of blank and the service life of mold.
7. third time molding upsetting process in institute molding blank on kidney-shaped counterbore depth and positive flange section and hexagonal
The total height of prism section is suitable, has both avoided generation since the form depth of kidney-shaped counterbore is too deep and has led to not normal de- material
Situation, simultaneously, it is also ensured that between kidney-shaped counterbore and kidney-shaped location hole partition part thick bottom it is smaller so that its through-hole it
It loses afterwards and expects that the variation of the shape of smaller and generated nut entirety is smaller, meanwhile, also facilitate the operation and reduction of punching
The stress intensity of mold.
8. in third time molding upsetting process kidney-shaped location hole on molding blank depth than boss section height
0.5-0.55 times of small 1-2mm and the kidney-shaped location hole for kidney-shaped counterbore molding in the process；So that remaining do not rushed
The thickness of the part in hole as far as possible small, enables hexagonal prismoid section and boss section reliably to form, while reducing the waste of raw material.
9. obtaining the blank of line style by blanking procedure, guarantee the consistency of billet size, so that molding with batch institute
The shape size of nut can be consistent；Trimming is formed by outer chamfer can have with the blank in first time molding upsetting process
There is better compactness, consequently facilitating molding round end, the formation of inner chamfer then facilitates mold and forms kidney-shaped positioning on blank
Hole.
10. the molding outer chamfer of institute includes the first chamfering and the second chamfering on blank, further make the end of blank
Shape can further increase the reliability and formed precision that round end is formed on blank close to the circular shape on mold.
11. by punching operation and eccentric flange molding procedure collection together in the quantity and work in the same process, reducing process
It is pressed from both sides between sequence the time of fortune, improves working efficiency；Eccentric flange molding procedure molding eccentric flange Duan Yuzheng of institute on blank
Flange section is tangent, namely the diameter of molding positive flange section be just sufficiently used for molding eccentric flange section, and then avoid original
The waste of material.
12. in the technical scheme, forming the first time molding upsetting process in upsetting process, second of molding upsetting work three times
Sequence, third time molding upsetting process and eccentric flange molding procedure pass through respectively arranged first mold, the second mold, third mould
Has the molding with shape needed for blank of the 4th mold to realize corresponding process, the independence between each process is good, and phase is not present
Mutually interference, is effectively ensured the final product quality and shaping efficiency of product.
13. the flange groove cooperation in the first mold on the first preshoot component and the first type chamber is defined and forms the circle on blank
Head, since the diameter of flange groove is greater than round end diameter, first preshoot component one end should be protruded into flange groove when molding, with
The round end of shaping blank is defined, and cooperate the outer wall of the first preshoot component can with the cell wall of flange groove and position, and then improve mould
Have the structural stability in shaping structures, guarantee the formed precision of round end, the molding of the kidney-shaped counterbore on blank passes through first
The first front projection upsetting on pediment stick enters molding, and structure is simple, operates conveniently；Kidney-shaped location hole and the first backlash stick on blank
On the first rear projection grafting and formed rotation stop cooperation, to guarantee that blank does not rotate during upsetting, with improve at
The precision of type guarantees that kidney-shaped counterbore and kidney-shaped location hole can be accurately opposite.
14. upsetting system is carried out by the blank intracavitary to second type of the second front projection on the second pediment stick in the second mold,
With the kidney-shaped counterbore on upsetting depth blank, meanwhile, by being highly greater than the second rear projection of the first rear projection on the second backlash stick, make
The first kidney-shaped location hole after the upsetting system of obtaining on blank also continues to deepen, but by the molding kidney-shaped location hole of institute and waist in the process
The intensification depth of shape counterbore is insufficient to allow blank to generate the variation on biggish height form, therefore, would not also generate to
The biggish enclasping force of two front projections or the second rear projection, so that the de- material operation after molding is facilitated, meanwhile, also just cancel
The use of ejector sleeve (effect are as follows: for pushing blank to carry out de- material in discharging), avoids due to upsetting system and makes in mold
At ejector sleeve deformation or the generation of stuck phenomenon, the service life of mold is improved.
15. in third mold, continuing to deepen kidney-shaped counterbore, Yi Jitong by the third front projection in third preshoot rod assembly
The third rear projection crossed on third backlash stick continues to deepen kidney-shaped location hole, wherein partition kidney-shaped counterbore and kidney-shaped location hole
Part, which needs to rush in subsequent handling, removes, and according to constant-volume principle, the shape of blank will not occur too big in punching operation
Variation, therefore, needs to be completed at the same time in this process the molding of positive flange section, hexagonal prismoid section and boss section, the knot of mold
Structure is simple, reliable in action, likewise, in this process the intensification depth of molding kidney-shaped location hole and kidney-shaped counterbore be not enough to
So that blank is generated the variation on biggish height form, therefore, would not also generate to third front projection or third rear projection
Biggish enclasping force, so that the de- material operation after molding is facilitated, meanwhile, the use of ejector sleeve in mold is also just eliminated, is kept away
Exempt from the ejector sleeve deformation for causing wall surface relatively thin due to upsetting system or the generation of stuck phenomenon, improves the service life of mold.
16. the 4th mold is rushed the part for separating kidney-shaped counterbore and kidney-shaped location hole in blank to preceding by the 4th backlash stick
It rushes in the axially extending bore of core pipe, meanwhile, the offset portion of eccentric setting is poured by the positive flange section of blank to inclined in preshoot core pipe
Positive flange section can be carried out to axial punching to form required eccentric flange when in heart slot, the structure of mold is simple, reliable in action,
And molding eccentric flange shape it is regular, saturation and uniformly, precision is higher.
17. the structure of the 5th mold and the 6th mold is simple, operates conveniently.
18. the 7th mold can be used for reliably forming kidney-shaped location hole needed for blank, knot in molding upsetting process for the first time
Structure is simple, operates conveniently.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below to needed in embodiment description
Attached drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the invention, for this field
For those of ordinary skill, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the process schematic one of the cold-heading molding technique of eccentric flange nut of the embodiment of the present invention with boss；
Fig. 2 is the process schematic two of the cold-heading molding technique of eccentric flange nut of the embodiment of the present invention with boss；
Fig. 3 is the structural schematic diagram of the 5th mold in the embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the 6th mold in the embodiment of the present invention；
Fig. 5 is the structural schematic diagram of the 7th mold in the embodiment of the present invention；
Fig. 6 is the structural schematic diagram of the first mold in the embodiment of the present invention；
Fig. 7 is the structural schematic diagram of the second mold in the embodiment of the present invention；
Fig. 8 is the structural schematic diagram of third mold in the embodiment of the present invention；
Fig. 9 is the structural schematic diagram of the 4th mold in the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.Obviously, described embodiment is the preferred embodiment of the present invention, and is not to be seen as the row to other embodiments
It removes.Based on the embodiment of the present invention, those skilled in the art are obtained all under the premise of not making creative work
Other embodiments shall fall within the protection scope of the present invention.
In claims of the present invention, specification and above-mentioned attached drawing, unless otherwise specifically limited, such as using term " the
One ", " second " or " third " etc. are provided to distinguish different objects, be not use to describe a particular order.
In claims of the present invention, specification and above-mentioned attached drawing, unless otherwise specifically limited, for the noun of locality, such as
Using term " center ", " transverse direction ", " longitudinal direction ", "horizontal", " vertical ", "top", "bottom", "inner", "outside", "upper", "lower",
The indicating positions such as "front", "rear", "left", "right", " clockwise ", " counterclockwise " or positional relationship are orientation based on the figure
And positional relationship, and be merely for convenience of the narration present invention and simplify description, rather than the device or member of indication or suggestion meaning
Part must have a particular orientation or be constructed and operated in a specific orientation, so can not be interpreted as limiting of the invention specific
Protection scope.
In claims of the present invention, specification and above-mentioned attached drawing, unless otherwise specifically limited, such as using term " Gu
Connect " or " being fixedly connected ", it should broadly understood, i.e., between the two without any connection side of displacement relation and relative rotation relationship
Formula, that is to say, that including be unremovably fixedly connected with, be removably secured connection, be linked together and by other devices or
Element is fixedly connected.
In claims of the present invention, specification and above-mentioned attached drawing, such as using term " includes ", " having " and they
Deformation, it is intended that " including but not limited to ".
Referring to Fig. 1 and Fig. 2, figures 1 and 2 show that the cold-heading molding of eccentric flange nut of the embodiment of the present invention with boss
The schematic diagram of technique.As depicted in figs. 1 and 2, in embodiments of the present invention, the bias with boss provided by the embodiment of the present invention
Kidney slot has been axially penetrated through in the cold-heading molding technique of flange nut in the eccentric flange nut with boss of required preparation, and has been wrapped
Include eccentric flange section, the boss section of hexagonal prismoid section and cylinder set gradually along axial direction, the eccentric flange spiral shell with boss
Female cold-heading molding technique includes the blanking procedure set gradually, trimming, punching operation, forms upsetting process and bias three times
Flange forming and punching operation.
Wherein, blanking procedure is that the raw material after being straightened are cut into section, the blank of line style is made.
Trimming is that the resulting blank of blanking procedure is carried out upsetting system, with the both ends in blank be respectively formed inner chamfer and
Outer chamfer, blank are equipped with one end of outer chamfer as one end for forming round end.Specifically, in the present embodiment, trimming
It include two the first chamferings and the second chamfering being mutually connected for the molding outer chamfer of blank, the both ends of the first chamfering are respectively with second
The end face of chamfering and blank connects, and size is 15-25 °；The size of second chamfering is 45-55 °.
For forming a kidney-shaped location hole on blank, which is used for subsequent location hole molding procedure
Rotation stop positioning is formed in process with mold；Specifically, location hole molding procedure forms institute in one end that blank forms inner chamfer
The kidney-shaped location hole needed defines for convenience, and in the present embodiment, the molding kidney-shaped location hole of process institute is named as the first waist
The depth of shape location hole and the first kidney-shaped location hole is 2.9-3.1mm.
Molding upsetting process is used to gradually form blank in three times positive flange section, hexagonal prismoid section and boss section three times, and
The kidney-shaped counterbore and exist in three times that coaxial form depth is successively deepened in one end that blank need to form eccentric flange section in three times
Blank need to form the kidney-shaped location hole that the coaxial form depth in one end of boss section is successively deepened；The positive flange section of its final molding with
Hexagonal prismoid section and the coaxial arrangement of boss section.
Specifically, it forms three times in upsetting process containing molding upsetting process for the first time, second of molding upsetting process and third time
Form upsetting process, wherein molding upsetting process forms round end in one end that blank need to form eccentric flange section for the first time, round end
Diameter is positive 0.75-0.85 times of flange section diameter, and molding upsetting process forms the first kidney-shaped counterbore in round end for the first time,
The depth of first kidney-shaped counterbore and the difference in height of round end are within 0.2mm；In addition, molding upsetting process is also needed into blank for the first time
The part of type hexagonal prismoid section forms six circumferentially uniformly distributed trapezoidal faces and forms in the part that blank need to form boss section
There is first boss；In the present embodiment, for the first time molding upsetting process in institute molding blank round end diameter be 30.6-31mm；
The depth of first kidney-shaped counterbore is 4.8-5.1mm；The diameter of first boss is 23.4-23.45mm；The height of first boss is
7.9-8.1mm。
The round end of blank is shaped to pre- flange by second of the molding upsetting process formed in upsetting process three times；Pre- flange with just
The diameter difference of flange section is within 2mm, in addition, second of molding upsetting process is also in the portion of six circumferentially uniformly distributed trapezoidal faces of blank
It is divided into the pre- hexagonal prismoid of type and is shaped to second boss at the first boss of blank；It is convex that the length of second boss is greater than first
The length of platform；It is deep that first kidney-shaped counterbore and the first kidney-shaped location hole are continued upsetting by the second molding upsetting process, and being separately formed is the
Two kidney-shaped counterbores and the second kidney-shaped location hole；In the present embodiment, second molding upsetting process in molding blank pre- flange
Diameter be 38-38.05mm；The depth of second kidney-shaped counterbore is 9.9-10.1mm；The depth of second kidney-shaped location hole is 5.9-
6.1mm；The diameter of second boss is 23-23.55mm；The height of second boss is 9.4-9.6mm；It should be appreciated that second boss
Height it is bigger than the height of first boss, be the constancy of volume due to blank during upsetting, the second waist of upsetting
The increase of the depth of shape location hole can then transform into the growth of the height of second boss.
The third time molding upsetting process formed in upsetting process three times is used to the pre- flange forming of blank be described above
Pre- hexagonal prismoid is shaped to required hexagonal prismoid section and second boss is shaped to required boss section by positive flange section；
Wherein, the thickness difference of positive flange section and required molding eccentric flange section is within 0.2mm；Third time forms upsetting process for second
It is deep that kidney-shaped counterbore and the second kidney-shaped location hole continue upsetting, and is separately formed as third kidney-shaped counterbore and third kidney-shaped location hole；It is excellent
Selection of land, the depth of the first kidney-shaped counterbore are the one third of third kidney-shaped counterbore depth；The depth of second kidney-shaped counterbore is third
2/3rds of kidney-shaped counterbore depth, and the depth error of the first kidney-shaped counterbore, the second kidney-shaped counterbore and third kidney-shaped counterbore is equal
Control is within 0.2mm；The depth of second kidney-shaped location hole is 2/3rds of the depth of third kidney-shaped location hole, and the first waist
The depth error of shape location hole, the second kidney-shaped location hole and third kidney-shaped location hole controls within 0.2mm.
In the present embodiment；Third form upsetting process in institute molding positive flange section diameter be 40-40.05mm；Third
The depth of kidney-shaped counterbore is 14.9-15.1mm, and the depth is equal with the total height of positive flange section and hexagonal prisms section or difference exists
Within 0.2mm；The depth of third kidney-shaped location hole is 8.9-9.1mm；The diameter of boss section is 23.6-23.65mm；Boss section
Height be 10.9-11.1mm preferably, the control of diameter difference between first boss, second boss and boss section 0.15mm it
It is interior.
Eccentric flange molding procedure is to carry out axial punching to the positive flange section on blank to form required eccentric flange
Section, specifically, in the present embodiment, eccentric flange molding procedure and punching operation collection together in the same process, eccentric flange at
Punching in type and punching operation is used to impact to third kidney-shaped positioning hole, to go out partition third kidney-shaped location hole and third
The part of kidney-shaped counterbore, so that third kidney-shaped location hole is connected to third kidney-shaped counterbore；Preferably, eccentric flange molding and punching
Eccentric flange molding procedure in the process molding eccentric flange Duan Yuzheng flange section on blank is tangent.
Referring to Fig. 3 to Fig. 9, Fig. 3 to Fig. 9 shows the embodiment of the present invention applied to the cold of the eccentric flange nut with boss
The schematic diagram of the composable mold of upsetting moulding process.As shown in figs. 3 to 9, the eccentric flange nut for above-mentioned with boss is cold
Upsetting moulding process, the present embodiment are also provided with a kind of composable mold applied to the cold-heading molding technique comprising set gradually
The 5th mold 5, the 6th mold 6, the 7th mold 7, the first mold 1, the second mold 2, third mold 3 and the 4th mold 4, with point
It Yong Yu not be with blanking procedure, trimming, punching operation, three times molding upsetting process and eccentric flange molding and punching operation pair
It answers, and becomes the mould carrier in corresponding process, it should be understood that by the production technology mode of existing fastener it is found that base
After material forms on each mold, auxiliary manipulator and clamping tooling is needed to carry out the folder fortune between different molds, that is, each mould
Fixture is equipped on tool, with for by its molding blank clamp to be located at next station mold.
Wherein, the first mold 1 includes the first type chamber 10, the first preshoot component 11 and the first backlash stick 12；First type chamber 10
For forming outer wall shape needed for blank in molding upsetting process for the first time, which is provided with flange groove 100, flange groove 100 it is straight
Diameter is greater than round end diameter；First preshoot component 11 is used to define with flange groove 100 with round end described in synthesis type, and in round end
The first kidney-shaped counterbore molding on blank needed for molding forms upsetting process for the first time；First backlash stick 12 stops with the first type chamber 10
Turn cooperation, end face is convexly equipped with first rear projection 121 opposite with the first front projection 1121, with for the first waist on blank
Shape location hole rotation stop cooperates grafting.Specifically, the first preshoot component 11 includes the first washing pipe 111 and the first pediment stick 112；First
One end of washing pipe 111 towards the first type chamber 10 has been recessed circular arc inside groove 1110, to define with flange groove 100 with synthesis type institute
The round end stated；First pediment stick 112 is coaxially arranged in the first washing pipe 111, and end face is convexly equipped with heavy for forming the first kidney-shaped
First front projection 1121 in hole.
Second mold 2 includes second type chamber 20, the second pediment stick 21, the second backlash stick 22；Second type chamber 20 is for forming
Outer wall shape needed for blank in second of molding upsetting process；One end of second pediment stick 21 towards second type chamber 20 is convexly equipped with
Two front projections 211, for forming molding second kidney-shaped counterbore needed for blank, the second front projection in second of molding upsetting process
211 height is greater than the first front projection 1121；Second backlash stick 22 cooperates with 20 rotation stop of second type chamber, and end face is convexly equipped with and the
Two front projections 211 are opposite and are highly greater than the second rear projection 221 of the first rear projection 121, for deepening first on blank
The depth of kidney-shaped location hole is simultaneously shaped to the second kidney-shaped location hole.
Third mold 3 includes third type chamber 30, third preshoot component 31 and third backlash stick 32；Third type chamber 30 be used at
Outer wall shape needed for type third time molding upsetting process blank；At parison in the end merging third type chamber 30 of third front assembly
The third front projection 3121 towards third type chamber 30 is convexly equipped on the end face and its end face of positive flange section on material, for forming
Molding third kidney-shaped counterbore needed for blank, the height of third front projection 3121 are greater than the second lordosis in third time molding upsetting process
Play 211；Third backlash stick 32 and 30 rotation stop of third type chamber cooperate, and end face is convexly equipped with and height opposite with third front projection 3121
Greater than the third rear projection 321 of the second rear projection 221, with the depth for deepening the second kidney-shaped location hole on blank and molding
For third kidney-shaped location hole；Third preshoot component includes third washing pipe 311 and third pediment stick 312；The end face of third washing pipe 311
For forming the end face of positive flange section；Third pediment stick 312 is coaxially arranged in third washing pipe 311, and end face is convexly equipped with third
Front projection 3121, for forming third kidney-shaped counterbore.
4th mold 4 includes the 4th type chamber 40, preshoot core pipe 41, the 4th backlash stick 42 and ejector sleeve 43；4th type chamber 40 is set
There is eccentric grove 400, is shaped to required eccentric flange section axially to cut when positive flange is placed in it；It is set in preshoot core pipe 41
There is axially extending bore 411, is equipped with towards one end of the 4th type chamber 40 and is adapted to and can be placed in eccentric grove 400 with eccentric grove 400
Offset portion, for pouring positive flange section in eccentric grove 400；4th backlash stick 42 be used for towards go out in axially extending bore 411 every
The part of third kidney-shaped counterbore and third kidney-shaped location hole in disconnected blank；Ejector sleeve 43 is sheathed on 42 periphery of the 4th backlash stick, with
In by shaping blank eject the 4th type chamber 40.
5th mold 5 includes quiet tool apron 51 and can the moving knife seat 52 that slides of relatively quiet tool apron 51；Quiet 51 positioning clamping of tool apron
Raw material through being straightened, the upper surface operation of the relatively quiet tool apron 51 of the edge of a knife of moving knife seat 52 expose quiet tool apron to cut off raw material
The part of 51 upper surfaces and the blank for obtaining required length.
6th mold 6 includes plastic chamber 60 and the 6th pediment stick 61, and plastic chamber 60 is used to fall outside one end of blank is formed
Angle；6th pediment stick 61 into plastic chamber 60 for pouring and forming inner chamfer in the other end of blank；It is equipped in plastic chamber 60
Mutually the first inclined surface 601 and the second inclined surface 602 of linking is fallen with forming the first chamfering and second to connect in one end of blank
Angle.
7th mold 7 includes positioning chamber 70 and the 7th pediment stick 71；Positioning chamber 70 is identical as plastic chamber 60, for forming
The merging of the blank of inner chamfer and outer chamfer；7th pediment stick 71 be equipped with towards positioning chamber 70 kidney-shaped protrusion 711, with blank at
Type has the first kidney-shaped location hole on one end shaping blank of inner chamfer.
It should be appreciated that the 6th mold 6, the 7th mold 7, the first mold 1, the second mold 2, third mold 3 and the 4th mold 4
In be provided with die holder, mode and fixing seat, die holder is equipped with axial through-hole, and mode is fixed in through-hole, and shape in it
It is packed into and molding corresponding type chamber at having for blank；Fixing seat is used to be slidably installed with for each backlash stick, and each backlash stick is logical
It crosses a mandril and carries out contact, with offset blank.
Through the foregoing embodiment it is found that blank is by using molding upsetting process three times to base in technical solution of the present invention
Material gradually forms positive flange section, hexagonal prismoid section and boss section in three times and avoids mold so that mold stress can evenly distribute
Once force-bearing is excessive, therefore, can effectively improve the service life of mold；In addition, the form of point three one-step formings can also make just
Flange section, hexagonal prismoid section and boss section can gradually be shaped to saturation shape in forming process from unsaturated shape, therefore,
The molding positive flange section of institute, hexagonal prismoid section and boss section are more saturated and beauty；Flange face is not present in the molding of positive flange section
Occur losing material phenomenon with edge, effectively increases the precision of finished product, be conducive to the production requirement for meeting enterprise；Kidney-shaped counterbore and waist
The case where shape location hole is also gradually formed by point three steps, can be to avoid stick absorption blank is rushed, liquidates to alleviate blank
The phenomenon that stick generates biggish enclasping force and can not be successfully de- material, can further cancel the use of ejector sleeve 43 in mold, keep away
Exempt to occur ejector sleeve 43 crack, deform, swelling or stuck situation, effectively increases the service life for rushing stick and mold.
Axially punching forms the technology mode of eccentric flange section by using first forming after positive flange section, can make flange
The forging flow velocity at each position is consistent during type is made in upsetting, it is ensured that the molding flange saturation of institute does not lose material, appearance
It is upper that convex thorn phenomenon is not present, improve molding positive flange section precision；It is easy to operate, meanwhile, it avoids bias and rushes stick or non-
The design for rushing stick of symmetrical structure reduces and rushes stick bending stress suffered during upsetting, avoids rushing stick and occurs wearing and break
The phenomenon that splitting.
The first time molding upsetting process formed in upsetting process three times is formed in one end that blank need to form eccentric flange section
Round end, and the diameter of round end is positive 0.75-0.85 times of flange section diameter, and molding upsetting process is molding in round end for the first time
The depth of kidney-shaped counterbore and the difference in height of round end within 0.2mm, the depth one-pass molding to avoid kidney-shaped counterbore it is too deep and by
Reaming phenomenon is generated under the radial pulling function of radial flange；Second of molding upsetting process in upsetting process is formed three times by blank
Round end be shaped to pre- flange；The diameter difference of pre- flange and positive flange section is supported within 2mm so that pre- flange periphery can approach
The phenomenon that generating reaming when connecing the side wall of the flange groove 100 in mold, and then mitigating the molding of kidney-shaped counterbore；By will for the first time at
Type upsetting, second of molding upsetting and third time molding upsetting are between each column type that the part that blank need to form boss section is separately formed
Diameter difference control within 0.15mm so that boss section during upsetting three times, can follow constant-volume principle only
The variation on axial height is generated, to effectively improve the production precision of product.
By the way that location hole moulding process is arranged, so that blank is in the upsetting for carrying out positive flange section, hexagonal prismoid section and boss section
A kidney-shaped location hole is formed before system, so that blank can form rotation stop cooperation when first time forming upsetting with mold, is kept away
Exempt from blank opposing mold during upsetting to rotate and damage blank, the precision of stable production process, shaped article is higher.
For the first time molding upsetting process on blank institute molding kidney-shaped counterbore depth be third time form upsetting process in base
The one third of the depth of molding kidney-shaped counterbore on material；The depth of second of molding upsetting process molding kidney-shaped counterbore on blank
Degree forms the kidney-shaped of upsetting process 2/3rds namely final molding of the depth of molding kidney-shaped counterbore on blank for third time
Counterbore is by the identical upsetting depth process molding of depth three times, to evenly distribute the stress intensity of blank and mold so that mold by
Power is uniformly and once force-bearing intensity is not too big, effectively increases the yields of blank and the service life of mold.
The depth of kidney-shaped location hole of the molding upsetting process on blank is third time molding upsetting process on blank for the first time
The one third of the depth of molding kidney-shaped location hole；Three times form upsetting process in second of molding upsetting process on blank at
The depth of the kidney-shaped location hole of type be third time molding upsetting process on blank the depth of molding kidney-shaped location hole three/
Two；Namely the kidney-shaped location hole of final molding is formed by the identical upsetting depth process of depth three times, to evenly distribute blank and mould
The stress intensity of tool so that mold uniform force and once force-bearing intensity is not too big, effectively increase blank yields and
The service life of mold.
Third time molding upsetting process in institute molding blank on kidney-shaped counterbore depth and positive flange section and hexagonal rib
The total height of shell of column is suitable, has both avoided generation since the form depth of kidney-shaped counterbore is too deep and has led to not the feelings of normal de- material
Condition, simultaneously, it is also ensured that the thick bottom of the partition part between kidney-shaped counterbore and kidney-shaped location hole is smaller, so that it is after through-hole
It loses and expects that the variation of the shape of smaller and generated nut entirety is smaller, meanwhile, it also facilitates the operation of punching and reduces mould
The stress intensity of tool.
In third time molding upsetting process kidney-shaped location hole on molding blank depth it is smaller than the height of boss section
0.5-0.55 times of 1-2mm and the kidney-shaped location hole for kidney-shaped counterbore molding in the process；So that remaining be not punched
Part thickness as far as possible small, so that hexagonal prismoid section and boss section is reliably formed, while reducing the waste of raw material.
The blank that line style is obtained by blanking procedure, guarantees the consistency of billet size, so that with the molding spiral shell of batch institute
Female shape size can be consistent；Trimming is formed by outer chamfer can have with the blank in first time molding upsetting process
Better compactness, consequently facilitating molding round end, the formation of inner chamfer then facilitate mold and forms kidney-shaped location hole on blank.
The molding outer chamfer of institute includes the first chamfering and the second chamfering on blank, further makes the end shape of blank
The reliability and formed precision that round end is formed on blank can be further increased close to the circular shape on mold.
By punching operation and eccentric flange molding procedure collection together in the quantity and process in the same process, reducing process it
Between press from both sides time of fortune, improve working efficiency, namely the diameter of the molding positive flange section of institute is just sufficiently used for forming eccentric flange
Section, and then avoid the waste of raw material.
First time molding upsetting process, second of molding upsetting process, the third time molding upsetting process in upsetting process are formed three times
And eccentric flange molding procedure by respectively arranged first mold 1, the second mold 2, third mold 3 and the 4th mold 4 come
The molding of shape needed for realizing the blank of corresponding process, the independence between each process is good, there is no interfering with each other, is effectively ensured
The final product quality and shaping efficiency of product.
The cooperation of flange groove 100 in first mold 1 on first preshoot component 11 and the first type chamber 10 is defined and forms blank
On round end, since the diameter of flange groove 100 is greater than round end diameter, 11 one end of the first preshoot component should be protruded into when molding
In flange groove 100, to define the round end of shaping blank, and make the outer wall of the first preshoot component 11 can be with the cell wall of flange groove 100
Cooperation positioning, and then structural stability of the mold in shaping structures is improved, guarantee the formed precision of round end, the kidney-shaped on blank
The molding of counterbore enters molding by 1121 upsetting of the first front projection on the first pediment stick 112, and structure is simple, operates conveniently；Blank
On kidney-shaped location hole and the first backlash stick 12 on 121 grafting of the first rear projection and formed rotation stop cooperation, to guarantee that blank exists
It does not rotate during upsetting system, to improve molding precision, guarantees that kidney-shaped counterbore and kidney-shaped location hole can be accurately opposite.
The blank in second type chamber 20 is carried out by the second front projection 211 on the second pediment stick 21 in second mold 2
Upsetting system, with the kidney-shaped counterbore on upsetting depth blank, by the second front projection 211 on the second pediment stick 21 in second type chamber 20
Blank carries out upsetting system, with the first kidney-shaped counterbore on upsetting depth blank, meanwhile, after being highly greater than first on the second backlash stick 22
Second rear projection 221 of protrusion 1121, so that the first kidney-shaped location hole after upsetting system on blank also continues to deepen, but by the work
In sequence the intensification depth of molding kidney-shaped location hole and kidney-shaped counterbore be insufficient to allow blank to generate on biggish height form
Variation, therefore, would not also generate the biggish enclasping force to the second front projection or the second rear projection 221, to facilitate into
After type de- material operation, meanwhile, also just eliminate ejector sleeve 43 in mold (effect are as follows: for discharging when push blank with into
Row de- material) use, avoid due to upsetting system and ejector sleeve 43 caused to deform or the generation of stuck phenomenon, that improves mold uses the longevity
Life.
Continue to deepen kidney-shaped counterbore by the third front projection 3121 in 312 component of third pediment stick in third mold 3, with
And continue to deepen kidney-shaped location hole by the third rear projection 321 on third backlash stick 32, wherein partition kidney-shaped counterbore and kidney-shaped
The part of location hole, which needs to rush in subsequent handling, removes, and according to constant-volume principle, the shape of blank will not be sent out in punching operation
Therefore raw too big variation needs to be completed at the same time in this process the molding of positive flange section, hexagonal prismoid section and boss section,
The structure of mold is simple, reliable in action, likewise, in this process molding kidney-shaped location hole and kidney-shaped counterbore intensification it is deep
Degree is insufficient to allow blank to generate the variation on biggish height form, therefore, would not also generate to third front projection or third
The biggish enclasping force of rear projection 221, so that the de- material operation after molding is facilitated, meanwhile, it also just eliminates in mold and pushes away
The use of pipe 43 avoids the deformation of ejector sleeve 43 or the generation of stuck phenomenon for causing wall surface relatively thin due to upsetting system, improves mold
Service life.
4th mold 4 is rushed the part for separating kidney-shaped counterbore and kidney-shaped location hole in blank to preceding by the 4th backlash stick 42
It rushes in the axially extending bore 411 of core pipe 41, meanwhile, the offset portion of eccentric setting is rushed by the positive flange section of blank in preshoot core pipe 41
Positive flange section can be carried out to axial punching to form required eccentric flange when entering to eccentric grove 400, the structure of mold is simple,
Reliable in action, and molding eccentric flange shape it is regular, saturation and uniformly, precision is higher.
The structure of 5th mold 5 and the 6th mold 6 is simple, operates conveniently.
7th mold 7 can be used for reliably forming kidney-shaped location hole needed for blank, structure in molding upsetting process for the first time
Simply, it operates conveniently.
In summary it analyzes, technical solution disclosed by the invention solves whole technical problems listed by specification, realizes
Corresponding technical effect.
The description of description above and embodiment is used to explain the present invention protection scope, but does not constitute and protect to the present invention
Protect the restriction of range.Through the invention or the enlightenment of above-described embodiment, those of ordinary skill in the art combine common knowledge, ability
The ordinary technical knowledge and/or the prior art in domain, it is available right by logical analysis, reasoning or limited test
Modification, equivalent replacement or the other improvements of the embodiment of the present invention or in which a part of technical characteristic, should be included in of the invention
Within protection scope.
Claims (19)
1. a kind of cold-heading molding technique of the eccentric flange nut with boss, kidney-shaped has been axially penetrated through in the eccentric flange nut
Hole, and the boss section of the eccentric flange section including being set gradually along axial direction, hexagonal prismoid section and cylinder；The cold-heading molding work
Skill includes process: blanking, shaping and punching；It is characterized in that: further including the upsetting work of molding three times after being sequentially arranged in trimming
Sequence and eccentric flange molding procedure；
The upsetting process of molding three times gradually forms positive flange section, hexagonal prismoid section and boss section to blank in three times, and divides three
The secondary kidney-shaped counterbore successively deepened in the coaxial form depth in one end that blank need to form eccentric flange section and in three times in blank
The kidney-shaped location hole that the coaxial form depth in one end of boss section is successively deepened need to be formed；The positive flange section and hexagonal prismoid section and
Boss section is coaxial；The kidney-shaped location hole is used to position for rotation stop grafting；The eccentric flange molding procedure is on blank
Positive flange section carries out axial punching to form required eccentric flange section.
2. a kind of cold-heading molding technique of the eccentric flange nut with boss as described in claim 1, it is characterized in that: described three
First time molding upsetting process in secondary molding upsetting process forms round end, the circle in one end that blank need to form eccentric flange section
The diameter of head is positive 0.75-0.85 times of flange section diameter, and forms upsetting process molding kidney-shaped counterbore in round end for the first time
Depth and round end difference in height within 0.2mm；Second of the molding upsetting process formed in upsetting process three times is by blank
Round end be shaped to pre- flange；The diameter difference of the pre- flange and positive flange section is within 2mm；It is described to form upsetting process three times
The pre- flange forming of blank is the positive flange section by third time molding upsetting process；The positive flange section and it is required it is molding partially
The thickness difference of heart flange section is within 0.2mm；The first time molding upsetting, second of molding upsetting and third time molding upsetting are in blank
The diameter difference between each column type that the part of boss section is separately formed need to be formed within 0.15mm.
3. a kind of cold-heading molding technique of the eccentric flange nut with boss as claimed in claim 2, it is characterized in that: described the
One-pass molding upsetting process in the part that blank need to form hexagonal prismoid section forms six circumferentially uniformly distributed trapezoidal faces and in base
The part that material need to form boss section forms first boss；Second of molding upsetting process, six ladders circumferentially uniformly distributed in blank
The part in shape face forms pre- hexagonal prismoid and is shaped to second boss at the first boss of blank；The length of the second boss
Degree is greater than the length of first boss.
4. a kind of cold-heading molding technique of the eccentric flange nut with boss as described in claim 1, it is characterized in that: described whole
Shape and to be formed between upsetting process three times further include location hole molding procedure, the location hole molding procedure for form it is described three times
Form the kidney-shaped location hole of blank in the first time molding upsetting of upsetting process.
5. a kind of cold-heading molding technique of the eccentric flange nut with boss as described in claim 1, it is characterized in that: described three
The depth of first time molding upsetting process molding kidney-shaped counterbore on blank in secondary molding upsetting process is third time molding upsetting work
The one third of sequence depth of molding kidney-shaped counterbore on blank；Second of the molding upsetting work formed in upsetting process three times
The depth of sequence molding kidney-shaped counterbore on blank is the depth that third time forms upsetting process molding kidney-shaped counterbore on blank
2/3rds；The error of the depth for each kidney-shaped counterbore that molding upsetting process is separately formed three times is within 0.2mm.
6. a kind of cold-heading molding technique of the eccentric flange nut with boss as described in claim 1, it is characterized in that: described three
The depth of kidney-shaped location hole of the first time molding upsetting process on blank in secondary molding upsetting process is third time molding upsetting process
The one third of the depth of molding kidney-shaped location hole on blank；Second of the molding upsetting work formed in upsetting process three times
The depth of sequence molding kidney-shaped location hole on blank is third time molding upsetting process molding kidney-shaped location hole on blank
2/3rds of depth；The error for the depth of each kidney-shaped location hole that molding upsetting process is separately formed three times 0.2mm it
It is interior.
7. a kind of cold-heading molding technique of the eccentric flange nut with boss as described in claim 1, it is characterized in that: described three
The depth Yu positive flange section and six ribs of third time molding upsetting process molding kidney-shaped counterbore on blank in secondary molding upsetting process
The height summation of shell of column is equal or differs within 0.2mm.
8. a kind of cold-heading molding technique of the eccentric flange nut with boss as claimed in claim 7, it is characterized in that: described three
Height of the depth of third time molding upsetting process molding kidney-shaped location hole on blank in secondary molding upsetting process than boss section
Small 1-2mm and be third time molding upsetting process 0.5-0.55 times of molding kidney-shaped counterbore depth on blank.
9. a kind of cold-heading molding technique of the eccentric flange nut with boss as claimed in claim 3, it is characterized in that: under described
Material process is that the raw material after being straightened are cut into section, the blank of the line style of required length is made.
10. a kind of cold-heading molding technique of the eccentric flange nut with boss as claimed in claim 9, it is characterized in that: described
Trimming is that the resulting blank of blanking procedure is carried out upsetting system, is respectively formed inner chamfer and outer chamfer with the both ends in blank,
Blank is equipped with one end of outer chamfer as one end for forming round end.
11. a kind of cold-heading molding technique of the eccentric flange nut with boss as claimed in claim 10, it is characterized in that: blank
On the outer chamfer include the first chamfering and the second chamfering to connect；The both ends of first chamfering respectively with the second chamfering and
The end face of blank connects, and size is 15-25 °；The size of second chamfering is 45-55 °.
12. a kind of cold-heading molding technique of the eccentric flange nut with boss as described in claim 1, it is characterized in that: described
Together in the same process, punching operation is used for by being formed in upsetting process three times for punching operation and eccentric flange molding procedure collection
Third time molding upsetting process molding kidney-shaped positioning hole impact on blank, so that it is connected to the kidney-shaped counterbore on blank；
The eccentric flange molding procedure molding eccentric flange Duan Yuzheng flange section of institute on blank is tangent.
13. a kind of cold-heading molding applied to the eccentric flange nut with boss as described in any one of claims 1 to 12
The composable mold of technique, it is characterized in that: include the first mold, the second mold, third mold and the 4th mold set gradually, with
Respectively as the first time molding upsetting process formed in upsetting process three times, second molding the upsetting process, third time set gradually
Form the mould carrier of upsetting process and eccentric flange molding procedure.
14. a kind of composable mold as claimed in claim 13, it is characterized in that: first mold includes the first type chamber, first
Preshoot component and the first backlash stick；The first type chamber is for forming outer wall needed for blank in the first time molding upsetting process
Shape, which is provided with flange groove, and the diameter of flange groove is greater than round end diameter；The first preshoot component with flange groove for defining
With round end described in synthesis type, and in round end molding for the first time molding upsetting process needed on blank molding kidney-shaped counterbore；
The first backlash stick and the first type chamber rotation stop cooperate, and end face is convexly equipped with convex after first opposite with the first front projection
It rises, for cooperating grafting with the kidney-shaped location hole rotation stop on blank.
15. a kind of composable mold as claimed in claim 14, it is characterized in that: second mold includes second type chamber, second
Pediment stick, the second backlash stick；The second type chamber is for forming outer wall shape needed for blank in second of molding upsetting process
Shape；One end of second pediment stick towards the second type chamber is convexly equipped with the second front projection, to form for forming described second
The height of molding kidney-shaped counterbore needed for blank in upsetting process, the second front projection is greater than the first front projection；The second backlash stick
Cooperate with second type chamber rotation stop, end face is convex after being convexly equipped with and height opposite with the second front projection greater than the second of the first rear projection
It rises, with the depth for deepening the kidney-shaped location hole on blank.
16. a kind of composable mold as claimed in claim 15, it is characterized in that: the third mold includes third type chamber, third
Preshoot component and third backlash stick；The third type chamber is for outer wall shape needed for forming the third time molding upsetting process blank
Shape；The third front assembly end merging third type it is intracavitary with the end face of the positive flange section on shaping blank and its end face it is convex
Equipped with the third front projection towards third type chamber, for forming molding waist needed for blank in the third time molding upsetting process
The height of shape counterbore, third front projection is greater than the second front projection；The third backlash stick and third type chamber rotation stop cooperate, end face
It is convexly equipped with the third rear projection that and height opposite with third front projection is greater than the second rear projection, for deepening the kidney-shaped on blank
The depth of location hole.
17. a kind of composable mold as claimed in claim 13, it is characterized in that: the 4th mold includes the 4th type chamber, preshoot
Core pipe, the 4th backlash stick and ejector sleeve；The 4th type chamber is equipped with eccentric grove, axially to cut into when positive flange section is placed in it
Type is the eccentric flange section；Axially extending bore is equipped in the preshoot core pipe, towards one end of the 4th type chamber be equipped with it is inclined
The offset portion that heart slot is adapted to and can be placed in eccentric grove, for pouring positive flange section in eccentric grove；The 4th backlash stick
For towards the part for going out kidney-shaped counterbore and kidney-shaped location hole in partition blank in axially extending bore；After the ejector sleeve is sheathed on the 4th
It rushes outside stick, for shaping blank to be ejected the 4th type chamber.
18. a kind of composable mold as claimed in claim 13, it is characterized in that: further including the 5th mold and the 6th set gradually
Mold；5th mold is used for blanking comprising quiet tool apron and can quiet tool apron sliding relatively moving knife seat；The quiet tool apron is fixed
Raw material of the position clamping through being straightened, the moving knife seat operation cutting raw material are to obtain the blank of required length；6th mould
Tool is used for shaping comprising plastic chamber and the 6th pediment stick, the plastic chamber are used for one end in blank and form outer chamfer；It is described
6th pediment stick is used to form inner chamfer in the other end of blank.
19. a kind of composable mold as claimed in claim 18, it is characterized in that: further including the 7th mould for forming location hole
Tool comprising positioning chamber and the 7th pediment stick；The positioning chamber is identical as plastic chamber, for forming inner chamfer and outer chamfer
Blank merging；7th pediment stick is equipped with the kidney-shaped protrusion towards positioning chamber, with formed in blank one end of inner chamfer at
Molding kidney-shaped location hole needed for blank in upsetting process is formed described in type for the first time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811571298.6A CN109622872B (en) | 2018-12-21 | 2018-12-21 | Cold heading forming process of eccentric flange nut with boss and combined die applied by cold heading forming process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811571298.6A CN109622872B (en) | 2018-12-21 | 2018-12-21 | Cold heading forming process of eccentric flange nut with boss and combined die applied by cold heading forming process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109622872A true CN109622872A (en) | 2019-04-16 |
| CN109622872B CN109622872B (en) | 2024-04-09 |
Family
ID=66076258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811571298.6A Active CN109622872B (en) | 2018-12-21 | 2018-12-21 | Cold heading forming process of eccentric flange nut with boss and combined die applied by cold heading forming process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109622872B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110421110A (en) * | 2019-09-11 | 2019-11-08 | 上海纳特汽车标准件有限公司 | Fluting axle nut one-step moulding method |
| CN111085640A (en) * | 2019-12-02 | 2020-05-01 | 山东九佳紧固件股份有限公司 | Cold heading production process of combined nut blank |
| CN111570704A (en) * | 2020-05-12 | 2020-08-25 | 浙江明泰控股发展股份有限公司 | Mold assembly of eccentric adjusting bolt and molding method of eccentric adjusting bolt |
| CN111687370A (en) * | 2020-06-22 | 2020-09-22 | 浙江明泰控股发展股份有限公司 | Forming process and forming device of cap nut |
| CN112059090A (en) * | 2020-10-03 | 2020-12-11 | 王建国 | Die for forging shaft coupling |
| CN112719189A (en) * | 2020-12-29 | 2021-04-30 | 苏州工业园区新凯精密五金有限公司 | Nut cold heading die and forming process |
| CN113020535A (en) * | 2021-03-19 | 2021-06-25 | 浙江纳特汽车标准件有限公司 | Cold heading forming module and cold heading forming method of rivet nut |
| CN114198380A (en) * | 2021-12-23 | 2022-03-18 | 东风汽车紧固件有限公司 | Vehicle flower-shaped nut and forming method thereof |
| CN114192786A (en) * | 2021-12-21 | 2022-03-18 | 广东盈峰材料技术股份有限公司 | Production method of shaft sleeve with boss |
| CN114871691A (en) * | 2021-12-26 | 2022-08-09 | 湖北博士隆科技有限公司 | Forming process of cover-shaped welded nut |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1820874A (en) * | 2005-02-19 | 2006-08-23 | 厦门恒耀金属有限公司 | Process for forming external welding leg square nut by multiple work position cold headers from coiled round wire |
| JP2009131889A (en) * | 2007-11-30 | 2009-06-18 | Sakamura Mach Co Ltd | Manufacturing method of grooved plug |
| JP2009220152A (en) * | 2008-03-17 | 2009-10-01 | Shuichi Naito | Cold heading device |
| CN101733350A (en) * | 2008-11-14 | 2010-06-16 | 江苏威鹰机械有限公司 | Production technology for blanking by using a through-hole type universal joint finish forging pot shell capable of moving axially |
| CN202343833U (en) * | 2011-11-26 | 2012-07-25 | 汕头经济特区超艺螺丝工业有限公司 | Cold heading and molding mould of main-secondary screw |
| CN103691874A (en) * | 2013-12-11 | 2014-04-02 | 中国航空工业标准件制造有限责任公司 | Forming method of thin-wall nut |
| CN103909205A (en) * | 2012-12-29 | 2014-07-09 | 宾科汽车紧固件（昆山）有限公司 | Cold heading device and process for pipe nuts |
| CN204094041U (en) * | 2014-08-15 | 2015-01-14 | 宾科汽车紧固件（昆山）有限公司 | Adjusting screw(rod) cold-heading device |
| CN105290300A (en) * | 2015-11-12 | 2016-02-03 | 苏州工业园区新凯精密五金有限公司 | Cold heading process of chassis eccentric nut and mold structure for forming special-shaped hole |
| CN205629267U (en) * | 2016-05-23 | 2016-10-12 | 鹏驰五金制品（昆山）有限公司 | Mould of processing automobile wheel hub nut |
| CN107671218A (en) * | 2017-10-30 | 2018-02-09 | 苏州工业园区新凯精密五金有限公司 | A kind of cold-heading molding technique and cold-heading module for being used to manufacture double end tail cutting slot screw |
-
2018
- 2018-12-21 CN CN201811571298.6A patent/CN109622872B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1820874A (en) * | 2005-02-19 | 2006-08-23 | 厦门恒耀金属有限公司 | Process for forming external welding leg square nut by multiple work position cold headers from coiled round wire |
| JP2009131889A (en) * | 2007-11-30 | 2009-06-18 | Sakamura Mach Co Ltd | Manufacturing method of grooved plug |
| JP2009220152A (en) * | 2008-03-17 | 2009-10-01 | Shuichi Naito | Cold heading device |
| CN101733350A (en) * | 2008-11-14 | 2010-06-16 | 江苏威鹰机械有限公司 | Production technology for blanking by using a through-hole type universal joint finish forging pot shell capable of moving axially |
| CN202343833U (en) * | 2011-11-26 | 2012-07-25 | 汕头经济特区超艺螺丝工业有限公司 | Cold heading and molding mould of main-secondary screw |
| CN103909205A (en) * | 2012-12-29 | 2014-07-09 | 宾科汽车紧固件（昆山）有限公司 | Cold heading device and process for pipe nuts |
| CN103691874A (en) * | 2013-12-11 | 2014-04-02 | 中国航空工业标准件制造有限责任公司 | Forming method of thin-wall nut |
| CN204094041U (en) * | 2014-08-15 | 2015-01-14 | 宾科汽车紧固件（昆山）有限公司 | Adjusting screw(rod) cold-heading device |
| CN105290300A (en) * | 2015-11-12 | 2016-02-03 | 苏州工业园区新凯精密五金有限公司 | Cold heading process of chassis eccentric nut and mold structure for forming special-shaped hole |
| CN205629267U (en) * | 2016-05-23 | 2016-10-12 | 鹏驰五金制品（昆山）有限公司 | Mould of processing automobile wheel hub nut |
| CN107671218A (en) * | 2017-10-30 | 2018-02-09 | 苏州工业园区新凯精密五金有限公司 | A kind of cold-heading molding technique and cold-heading module for being used to manufacture double end tail cutting slot screw |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110421110A (en) * | 2019-09-11 | 2019-11-08 | 上海纳特汽车标准件有限公司 | Fluting axle nut one-step moulding method |
| CN111085640B (en) * | 2019-12-02 | 2021-05-07 | 山东九佳紧固件股份有限公司 | Cold heading production process of combined nut blank |
| CN111085640A (en) * | 2019-12-02 | 2020-05-01 | 山东九佳紧固件股份有限公司 | Cold heading production process of combined nut blank |
| CN111570704A (en) * | 2020-05-12 | 2020-08-25 | 浙江明泰控股发展股份有限公司 | Mold assembly of eccentric adjusting bolt and molding method of eccentric adjusting bolt |
| CN111687370A (en) * | 2020-06-22 | 2020-09-22 | 浙江明泰控股发展股份有限公司 | Forming process and forming device of cap nut |
| CN112059090A (en) * | 2020-10-03 | 2020-12-11 | 王建国 | Die for forging shaft coupling |
| CN112059090B (en) * | 2020-10-03 | 2022-05-06 | 青岛宏达锻压机械有限公司 | Die for forging shaft coupling |
| CN112719189A (en) * | 2020-12-29 | 2021-04-30 | 苏州工业园区新凯精密五金有限公司 | Nut cold heading die and forming process |
| CN113020535A (en) * | 2021-03-19 | 2021-06-25 | 浙江纳特汽车标准件有限公司 | Cold heading forming module and cold heading forming method of rivet nut |
| CN113020535B (en) * | 2021-03-19 | 2023-02-07 | 浙江纳特汽车标准件有限公司 | Cold heading forming module and cold heading forming method of rivet nut |
| CN114192786A (en) * | 2021-12-21 | 2022-03-18 | 广东盈峰材料技术股份有限公司 | Production method of shaft sleeve with boss |
| CN114198380A (en) * | 2021-12-23 | 2022-03-18 | 东风汽车紧固件有限公司 | Vehicle flower-shaped nut and forming method thereof |
| CN114871691A (en) * | 2021-12-26 | 2022-08-09 | 湖北博士隆科技有限公司 | Forming process of cover-shaped welded nut |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109622872B (en) | 2024-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109622872A (en) | A kind of cold-heading molding technique of the eccentric flange nut with boss and its applied composable mold | |
| CN209502863U (en) | A kind of cold-heading molding composable mold of the eccentric flange nut with boss | |
| CN109848361B (en) | Method for manufacturing T-shaped elliptical inner sleeve blank for automobile | |
| CN106475502B (en) | A kind of jag draws the manufacturing method of cap blank | |
| CN104525811A (en) | Part cold heading machining method | |
| CN110814248B (en) | Flash-free hot die forging forming process for front shell forging of automobile differential | |
| CN101722265B (en) | Precision forging die for complex cylindrical titanium alloy forged piece | |
| CN204996988U (en) | Two step pipe heading moulds | |
| CN110449516B (en) | Deep barrel anti-wrinkling drawing die and process | |
| CN109079084B (en) | Cold upsetting and cold forging forming die for connecting fork or joint fork and forming process thereof | |
| CN109513874A (en) | It is a kind of for manufacturing the cold-heading molding technique and cold heading die group of tetragonal pyramid bottom nut | |
| CN208495685U (en) | Oil pipe bolt Combined mold for processing | |
| CN207806510U (en) | A kind of cold-heading module for the bolt with thin-walled washer | |
| CN107717345B (en) | A kind of technique generating steel pipe of the both ends of the surface with 0.5MM or less chamfering | |
| CN206262996U (en) | Ball stud cold extrusion die | |
| CN214640280U (en) | Powder metallurgy forming die of multistage difference angle piece | |
| CN107639194B (en) | Valve body forging die | |
| CN209935740U (en) | Cold forming multi-station die for inner square sleeve nut | |
| CN204365938U (en) | A kind of cold upsetting die of car manufacturing automobile outer-hexagonal ball stud | |
| CN101704048A (en) | Process for stamping thin-wall battery case by using joggle die and joggle die | |
| CN208913050U (en) | A kind of molding die for ball valve forging processing | |
| CN110886756A (en) | Special-shaped eccentric pin column and production process thereof | |
| CN106424192B (en) | Ball stud cold extrusion die | |
| CN208408287U (en) | Make the mold of air conditioning for automobiles connector | |
| CN111889986B (en) | Pin structure for automobile tensioner and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |