CN110252885A - A kind of forming method of thinner flanging and a kind of it is applied to the molding structure of thinner flanging - Google Patents
A kind of forming method of thinner flanging and a kind of it is applied to the molding structure of thinner flanging Download PDFInfo
- Publication number
- CN110252885A CN110252885A CN201910533957.5A CN201910533957A CN110252885A CN 110252885 A CN110252885 A CN 110252885A CN 201910533957 A CN201910533957 A CN 201910533957A CN 110252885 A CN110252885 A CN 110252885A
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- blank
- flanging
- groove
- thinner
- boss
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- 238000000465 moulding Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000004080 punching Methods 0.000 claims abstract description 8
- 230000009471 action Effects 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000005336 cracking Methods 0.000 abstract description 7
- 238000012797 qualification Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000010409 ironing Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/001—Shaping combined with punching, e.g. stamping and perforating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses a kind of forming methods of thinner flanging, the following steps are included: step 1, punching press is carried out on sheet blank, it is formed and rushes structure in advance, for the pre- structure of rushing with groove and boss, the groove is located at the blank upper surface, the boss is located at the blank lower surface, i.e. groove and boss are oppositely arranged up and down, and groove and boss are located on same axis, and the diameter of the groove is less than the diameter of the boss；The periphery of the blank upper groove is planar structure；Step 2 is punched out rushing in structure in advance, forms pre-punched hole；The blank for completing pre-punched hole is placed on flange cavity plate by step 3, there is matched flanging die above flange cavity plate, under the action of flanging die and flange cavity plate, carries out thinner flanging molding to blank.The structure is able to solve the problem of Cracking of product during thinner flanging, improves the qualification rate of product, reduces waste product product, saves production cost.
Description
Technical field
The invention belongs to field of machining, and in particular to a kind of method of thinner flanging and a kind of be applied to thinner flanging
Molding structure.
Background technique
In part processing, thinner flanging is a kind of common processing and forming technology, conventional thinner flanging forming method
It is first to be punched out on blank 1 (referring to attached drawing 1), the diameter of punching is D0, then the plate for completing punching is squeezed
Deformation completes thinner flanging molding, the diameter of flanging die 4 referring to attached drawing 2 under the action of flanging die 4 and flange cavity plate 5
For d1, the diameter of flange cavity plate 5 is d2, the workpiece after final molding is t1, the height of workpiece is h, what thinner flanging stretched
Length is h0。
When thinner flanging, small―gap suture is used between punch-pin and cavity plate, material, which is squeezed, occurs biggish plastic deformation, from
And vertical edge thickness is thinned, height increases.Thinner flanging requires material to have good plasticity, in thinner flanging, deforms journey
Degree depends not only on flanging coefficient, additionally depends on the thinning degree of wall portion.In addition, the punch-pin and cavity plate size of given hole flanging, turning over
Side height is all critical size, and influences the key factor of workpiece quality.
Thinner flanging is primarily present the problems such as deformation, rebound and cracking, seriously affects the quality of workpiece.And wherein flange is opened
The problem of splitting easily causes product to be scrapped in large quantities, and seriously affects product qualification rate, therefore solving flange problem of Cracking is to solve flange
The top priority of class problem.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide one kind to be applied to the molding structure of thinner flanging,
The structure is able to solve the problem of Cracking of product during thinner flanging, improves the qualification rate of product, reduces waste product product,
Save production cost.
The present invention is achieved by the following technical solutions: a kind of forming method of thinner flanging, comprising the following steps:
Step 1 carries out punching press on sheet blank, is formed and rushes structure in advance, and the pre- structure of rushing has groove and boss,
The groove is located at the blank upper surface, and the boss is located at the blank lower surface, i.e., groove and boss are opposite up and down sets
It sets, and groove and boss are located on same axis, the diameter of the groove is less than the diameter of the boss；The blank upper groove
Periphery be planar structure；
Step 2 is punched out rushing in structure in advance, forms pre-punched hole；
The blank for completing pre-punched hole is placed on flange cavity plate by step 3, is had above flange cavity plate matched
Flanging die carries out thinner flanging molding to blank under the action of flanging die and flange cavity plate.
In the above-mentioned technical solutions, the pre-punched hole and the pre- structure concentric that rushes are arranged.
In the above-mentioned technical solutions, the blank top surface with rush in advance structure floor with a thickness of t2, the thickness of the blank
For t, the t2Range be less than twice of the t.
In the above-mentioned technical solutions, the blank top surface with rush in advance structure floor with a thickness of t2, the thickness of the blank
For t, the t2Range be greater than the t.
In the above-mentioned technical solutions, it is provided at least one on the blank and pre- rushes structure.
In the above-mentioned technical solutions, the pre- thickness for rushing structure is identical as the thickness of the blank.
In the above-mentioned technical solutions, the diameter of the pre-punched hole is less than the diameter of the groove.
In the above-mentioned technical solutions, the material of the blank is plate made of SPH440-0D.
The advantages and benefits of the present invention are: the present invention, which provides one kind, is applied to the molding structure of thinner flanging, the knot
Structure is able to solve the problem of Cracking of product during thinner flanging, improves the qualification rate of product, reduces waste product product, saves
Production cost.Attached drawing 2 and attached drawing 4 are compared, in material thickness t, molding wall thickness t1, flange height h, flanging die diameter d1, flange
Cavity plate d2Diameter it is constant under the premise of (i.e. final molding size and molding die do not change), since this method increases step
Rapid one and step 2, so that having the advantages that first, the diameter of pre-punched hole is by D0Increase to D1, flanging coefficient increases with it；
Second, the length of ironing has original h0It is reduced to h1, this is because rushing structure produces solid thickness in advance, so reducing
The ironing amount of metal.The above two o'clock is all an important factor for influencing flange crack at edge, to be verified by production, using this
The cracking rate of the structure of embodiment, part is reduced to 0% by original 50%, and the qualification rate of workpiece is 100%.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of conventional thinner flanging blank；
Fig. 2 is the structural schematic diagram of conventional thinner flanging；
Fig. 3 is structural schematic diagram of the invention；
Fig. 4 is the molding structural schematic diagram of thinner flanging.
Wherein:
1: blank, 2: structure is rushed in advance, 2-1: groove, 2-2: boss, 3: pre-punched hole, 4: flanging die, 5: flange cavity plate.
It for those of ordinary skill in the art, without creative efforts, can be according to above attached
Figure obtains other relevant drawings.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, combined with specific embodiments below furtherly
Bright technical solution of the present invention.
Embodiment one
Referring to attached drawing 3, a kind of forming method of thinner flanging, comprising the following steps:
Step 1,1 carries out punching press on sheet blank, is formed and rushes structure 2 in advance；It is described it is pre- rush structure 2 with groove 2-1 and
The lower part of 1 upper surface of blank is arranged in boss 2-2, the groove 2-1, and the boss 2-2 is arranged in 1 following table of blank
The lower part in face, the diameter of the groove 2-1 are less than the diameter of the boss 2-2；The periphery of the 1 upper groove 2-1 of blank is flat
Face structure.
Step 2 is rushed in structure 2 and is punched out in advance, forms pre-punched hole 3, the pre-punched hole 3 with described pre- to rush structure 2 same
Center of circle setting；
The blank 1 for completing pre-punched hole 3 is placed on flange cavity plate 5 by step 3, and the diameter of the flange cavity plate 5 is d2,
There is matched flanging die 4 above flange cavity plate 5, the diameter of the flanging die 4 is d1, in flanging die 4 and turn over
Under the action of edge die 5, thinner flanging molding is carried out to blank 1, final thinner flanging workpiece after molding is t1, workpiece
Final molding height be h.
Attached drawing 2 and attached drawing 4 are compared, in material thickness t, molding wall thickness t1, flange height h, flanging die 4 diameter d1, turn over
The diameter d of edge die 52Under the premise of constant (i.e. final molding size and molding die do not change), since this method increases
Step 1 and step 2 so that have it is following a little: first, the diameter of pre-punched hole is by D0Increase to D1, flanging coefficient increases therewith
Greatly；Second, the length of ironing is by original h0It is reduced to h1, this is because rushing structure 2 in advance produces solid thickness (pre- punching
The thickness t of structure 2 is identical as the thickness t of the blank 1), so reducing the ironing amount of metal.The above two o'clock is all shadow
An important factor for ringing flange crack at edge is verified by production, and using the structure of the present embodiment, the cracking rate of workpiece is by original
50% is reduced to 0%, and the qualification rate of workpiece is 100%.
Embodiment two
The present embodiment is advanced optimized on the basis of example 1.
It is preferred that 1 top surface of blank with rush in advance 2 bottom surface of structure with a thickness of t2, the blank 1 with a thickness of
T, the t2Range be less than twice of the t.1 top surface of blank with rush in advance 2 bottom surface of structure with a thickness of t2, the base
Material 1 with a thickness of t, the t2Range be greater than the t.It is provided at least one on the blank 1 and pre- rushes structure 2.
It is preferred that the diameter of the pre-punched hole 3 is less than the diameter of the groove 2-1.
Embodiment three
The present embodiment advanced optimizes on the basis of the above embodiments.
It is preferred that the material of the blank 1 is plate made of SPH440-0D.
The spatially relative terms such as "upper", "lower", "left", "right" have been used in embodiment for ease of explanation, have been used for
Relationship of the elements or features relative to another elements or features shown in explanatory diagram.It should be understood that in addition to figure
Shown in except orientation, spatial terminology is intended to include the different direction of device in use or operation.For example, if in figure
Device be squeezed, the element for being stated as being located at other elements or feature "lower" will be located into other elements or feature "upper".
Therefore, exemplary term "lower" may include both upper and lower orientation.Device, which can be positioned in other ways, (to be rotated by 90 ° or position
In other orientation), it can be interpreted accordingly used herein of the opposite explanation in space.
Moreover, the relational terms of such as " first " and " second " or the like are used merely to one with another with identical
The component of title distinguishes, without necessarily requiring or implying between these components there are any this actual relationship or
Sequentially.
Illustrative description has been done to the present invention above, it should explanation, the case where not departing from core of the invention
Under, any simple deformation, modification or other skilled in the art can not spend the equivalent replacement of creative work equal
Fall into protection scope of the present invention.
Claims (8)
1. a kind of forming method of thinner flanging, which comprises the following steps:
Step 1 carries out punching press on sheet blank (1), and formation is rushed structure (2) in advance, and described pre- rush structure (2) are with groove (2-
1) and boss (2-2), and the groove (2-1) is located at the blank (1) upper surface, and the boss (2-2) is located at the blank
(1) lower surface, groove (2-1) and boss (2-2) are located on same axis, and the diameter of the groove (2-1) is less than the boss
The diameter of (2-2)；
Step 2 is punched out rushing on structure (2) in advance, is formed pre-punched hole (3)；
Step 3, the blank (1) for completing pre-punched hole (3) is placed on flange cavity plate (5), have above the flange cavity plate (5) with
Cooperation flanging die (4), under the action of flanging die (4) and flange cavity plate (5), to blank (1) carry out thinner flanging
Molding.
2. according to claim 1 a kind of applied to the molding structure of thinner flanging, it is characterised in that: the pre-punched hole
(3) it is arranged with pre- structure (2) concentric that rushes.
3. according to claim 1 a kind of applied to the molding structure of thinner flanging, it is characterised in that: the blank (1)
Top surface and it is described it is pre- rush structure (2) bottom surface with a thickness of t2, the blank (1) with a thickness of t, the t2Range be less than the t
Twice.
4. according to claim 1 a kind of applied to the molding structure of thinner flanging, it is characterised in that: the blank (1)
Top surface and in advance rush structure (2) bottom surface with a thickness of t2, the blank (1) with a thickness of t, the t2Range be greater than the t.
5. a kind of forming method of thinner flanging according to claim 1, it is characterised in that: be arranged on the blank (1)
There is at least one pre- to rush structure (2).
6. a kind of according to claim 1 or 5 be applied to the molding structure of thinner flanging, it is characterised in that: the pre- punching
The thickness of structure (2) is identical as the thickness of the blank (1).
7. according to claim 3 a kind of applied to the molding structure of thinner flanging, it is characterised in that: the pre-punched hole
(3) diameter is less than the diameter of the groove (2-1).
8. according to claim 1 a kind of applied to the molding structure of thinner flanging, it is characterised in that: the blank (1)
Material be SPH440-0D made of plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910533957.5A CN110252885A (en) | 2019-06-19 | 2019-06-19 | A kind of forming method of thinner flanging and a kind of it is applied to the molding structure of thinner flanging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910533957.5A CN110252885A (en) | 2019-06-19 | 2019-06-19 | A kind of forming method of thinner flanging and a kind of it is applied to the molding structure of thinner flanging |
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|---|---|
| CN110252885A true CN110252885A (en) | 2019-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910533957.5A Pending CN110252885A (en) | 2019-06-19 | 2019-06-19 | A kind of forming method of thinner flanging and a kind of it is applied to the molding structure of thinner flanging |
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| CN (1) | CN110252885A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110842085A (en) * | 2019-11-21 | 2020-02-28 | 常州洛合精密机械有限公司 | Progressive die tooth extraction method |
| CN111054798A (en) * | 2019-10-22 | 2020-04-24 | 上海申驰实业有限公司 | Flanging hole manufacturing process for automobile parts |
| CN111151649A (en) * | 2020-01-16 | 2020-05-15 | 天津津荣天宇精密机械股份有限公司 | Upward forming method for buckle |
| CN111216307A (en) * | 2020-01-14 | 2020-06-02 | 东莞市巨唯电子科技有限公司 | Production process of ultrathin mobile phone backlight iron shell |
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2019
- 2019-06-19 CN CN201910533957.5A patent/CN110252885A/en active Pending
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| JP2007275977A (en) * | 2006-04-11 | 2007-10-25 | Fujifilm Corp | Press die, burring process, and press-formed article |
| CN101850380A (en) * | 2010-05-26 | 2010-10-06 | 苏州铭峰精密机械有限公司 | High flanging hole forming method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111054798A (en) * | 2019-10-22 | 2020-04-24 | 上海申驰实业有限公司 | Flanging hole manufacturing process for automobile parts |
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| CN111216307A (en) * | 2020-01-14 | 2020-06-02 | 东莞市巨唯电子科技有限公司 | Production process of ultrathin mobile phone backlight iron shell |
| CN111151649A (en) * | 2020-01-16 | 2020-05-15 | 天津津荣天宇精密机械股份有限公司 | Upward forming method for buckle |
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