CN112517831A - Guide pin cold heading processing technology - Google Patents
Guide pin cold heading processing technology Download PDFInfo
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- CN112517831A CN112517831A CN202011291388.7A CN202011291388A CN112517831A CN 112517831 A CN112517831 A CN 112517831A CN 202011291388 A CN202011291388 A CN 202011291388A CN 112517831 A CN112517831 A CN 112517831A
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- cold heading
- guide pin
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- 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
- B21K1/44—Making machine elements bolts, studs, or the like
- B21K1/46—Making machine elements bolts, studs, or the like with heads
- B21K1/463—Making machine elements bolts, studs, or the like with heads with recessed heads
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
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Abstract
The invention discloses a guide pin cold heading processing technology, which has the technical scheme main points that: a cold heading process for guide pin features that six sets of forging dies are sequentially used to form guide pin by cold heading step by step. Thereby realize processing the uide pin through the cold-heading mode, ensure cold-heading fashioned qualification rate, effectively practice thrift processing material to improve the production efficiency of uide pin.
Description
Technical Field
The invention relates to the field of guide pin machining, in particular to a guide pin cold heading machining process.
Background
A conventional guide pin is shown in fig. 8 and has a head portion and a shaft portion.
The guide pin is generally processed by adopting a hot forging or casting process, the guide pin processed by the process has low processing efficiency, high energy consumption and large pollution, and in addition, the processed guide pin has low strength due to the characteristics of the process.
Therefore, there is a need for an improved structure that overcomes the above-mentioned deficiencies.
Disclosure of Invention
The invention aims to provide a guide pin cold heading processing technology, which realizes the processing of a guide pin in a cold heading mode, ensures the qualification rate of cold heading forming, effectively saves processing materials and improves the production efficiency of the guide pin.
The technical purpose of the invention is realized by the following technical scheme: a cold heading processing technology for a guide pin is characterized in that six sets of forging splitting dies are used for sequentially forming through cold heading, and the cold heading processing technology comprises the following steps:
step 1: the method comprises the following steps that a rod-shaped blank enters a first set of sectional dies and is formed into a first intermediate material through cold heading by a cold heading machine, and the first intermediate material is formed into a cylindrical structure through cold heading at the head part of a guide pin;
step 2: filling the first intermediate material into a second set of sectional dies, and forming into a second intermediate material through cold heading by a cold header, wherein the second intermediate material is further extruded at the head position of the guide pin, and the outer diameter of the cylindrical structure is further enlarged;
and step 3: filling the intermediate material II into a third set of sectional die, and forming the intermediate material III through cold heading by a cold header, wherein the intermediate material III is formed at the head part of the guide pin in a circular truncated cone shape, and a groove is formed in the end face of the intermediate material III at the head part of the guide pin;
and 4, step 4: filling the intermediate material III into a fourth set of sectional dies, and forming the intermediate material IV by cold heading through a cold heading machine, so that the groove formed by the intermediate material IV in the intermediate material III is further enlarged;
and 5: filling the intermediate material IV into a fifth set of sectional die, and forming the intermediate material V by cold heading through a cold header, wherein the intermediate material V is formed into a cylindrical structure at the head part of the guide pin;
step 6: filling the intermediate material five into a sixth set of sectional dies, and forming the intermediate material five into a guide pin through cold heading by a cold heading machine, namely, cold heading the cylindrical structure in the intermediate material 5 into a hexagonal structure, and extruding the end surface of the cylindrical structure to realize processing and forming of the guide pin;
the first section die, the second section die, the third section die, the fourth section die, the fifth section die and the sixth section die are identical in structure, and the molding die cavities of the first section die, the second section die, the third section die, the fourth section die, the fifth section die and the sixth section die are consistent in shape with the corresponding first middle material, the second middle material, the third middle material, the fourth middle material, the fifth middle material and the guide pin respectively.
The invention is further provided with: the first section die, the second section die, the third section die, the fourth section die, the fifth section die and the sixth section die comprise a main die and a stamping die; the main die comprises a main die rear seat, a main die shell, a main die inner die, a main die push rod and a through rod, the main die inner die is arranged in the main die shell, the through rod is provided with a main die rear seat penetrating into an inner cavity of the main die inner die, and the main die push rod penetrates into the main die rear seat and pushes the through rod; the punching die comprises a punching die seat, a punching die rear pad structure and a punching rod structure, and the main die inner die, the through rod, the punching die seat and the punching rod structure surround to form a molding die cavity.
The invention is further provided with: the stamping die rear cushion structure and the stamping rod structure in the first section die, the second section die, the third section die and the fourth section die are all arranged in a columnar shape; in the third section mould, the fourth section mould, the fifth section mould, the sixth section mould, the master mode centre form is provided with the master mode cover sheet towards die stamping one end, the master mode cover sheet is cyclic annular setting, and master mode cover sheet lateral wall is the setting of round platform form, the master mode mould shell be provided with the butt in the inclined plane of master mode cover sheet lateral wall and fixed master mode cover sheet, master mode centre form, master mode cover sheet, logical stick, die stamping die holder and towards excellent structure surround and form the shaping die cavity.
The invention is further provided with: in the fifth sectional die and the sixth sectional die, the die rear cushion structure comprises a die middle sleeve which is annular and is arranged on a die base, a die rear cushion block which is arranged in an inner cavity of the die middle sleeve, a three-pin lock cushion which is arranged on the die base, and three die needles which penetrate through the three-pin lock cushion and are abutted against the die rear cushion block; the punching rod structure comprises a punching rod main body and a punching rod sleeve, wherein the punching rod main body is fixed on the three-needle lock pad, the punching rod sleeve is sleeved on the punching rod main body, the punching rod main body is abutted against the bottom surface of a groove formed by the middle material five, the punching rod sleeve is abutted against the end surface of the middle material five, and the punching die rear cushion block pushes the punching needle and drives the punching rod sleeve to move towards the direction of the main die.
The invention is further provided with: in the fifth subsection die, the inner wall of the die holder is provided with steps for abutting the three-pin lock pad and fixing the position of the three-pin lock pad, in the sixth subsection die, the die holder is divided into a die stamping shell and a die stamping core, the die stamping core can abut against the main die, one end of the die stamping core, which deviates from the main die, penetrates through the die stamping shell, the die stamping core slides relative to the die stamping shell along the axial direction of the die stamping shell, a spring for pushing the die stamping core to move in the direction of deviating from the die stamping shell is arranged in the die stamping shell, two ends of the spring abut against the three-pin lock pad and the die stamping core respectively, the side wall of the die stamping core is provided with a boss for abutting the end face of the die stamping shell, and a limit component for controlling the sliding position of the.
The invention is further provided with: the limiting assembly comprises a hemispherical surface groove arranged on the inner wall of the die stamping shell, a long groove arranged on the side wall of the die stamping core and corresponding to the hemispherical groove, and a ball arranged between the hemispherical surface groove and the long groove, wherein the length direction of the long groove is parallel to the moving direction of the die core.
In conclusion, the invention has the following beneficial effects:
through above-mentioned step cold-heading shaping uide pin, ensure to realize processing the uide pin through the cold-heading mode, ensure the fashioned qualification rate of cold-heading, effectively practice thrift processing material to improve the production efficiency of uide pin.
After the fourth subsection die is subjected to cold heading to form a fourth middle material and the fourth middle material is loaded into the fifth subsection die, the cold heading machine drives the punch die to move downwards, the punch rod main body firstly abuts against the groove position of the fourth middle material and is extruded at the groove position of the fourth middle material, then the punch rod sleeve abuts against the end face of the fourth middle material, and then the punch rod sleeve is driven to move through the die rear cushion structure and the punch pin, so that the fifth middle material is extruded and formed; and in the fifth set of sectional die, the punch rod main body is effectively fixed through the three-pin lock pad.
After the five-middle-material cold heading is finished, the five-middle-material cold heading is moved into a sixth sectional die, the cold heading machine drives the punch die to move downwards, the punch rod main body is abutted against the bottom surface of the five-middle cylindrical structure of the middle material, the rear punch die shell continues to move downwards to adapt to the relative position change of the punch rod main body, the punch die core and the punch die shell, the punch die shell is abutted against the punch die core after moving relatively to drive the punch die core to move downwards synchronously to extrude the outer side wall of the middle material, and therefore a hexagonal structure is extruded at the position of; then the punching rod sleeve is abutted against the four end faces of the intermediate material, and then the punching rod sleeve is driven to move through the punching rod rear cushion structure and the punching die three pins, so that a finished product of the guide pin is formed by extrusion.
Drawings
FIG. 1 is a schematic view of a first segmented mold;
FIG. 2 is a schematic view of a second segmented mold;
FIG. 3 is a schematic view of a third segmented mold;
FIG. 4 is a schematic view of a fourth segment mold;
FIG. 5 is a schematic view of a fifth segment mold;
FIG. 6 is a schematic view of a sixth segmented mold;
FIG. 7 is a cross-sectional view of the three-pin lock pad;
fig. 8 is a sectional view of a conventional guide bush.
The corresponding part names indicated by the numbers in the figures: 1. a back seat of the master mold; 2. a master mold shell; 3. an internal mold of the master mold; 4. a main die push rod; 5. d, passing through the rod; 6. a die holder; 7. a die rear pad structure; 8. punching a rod structure; 9. sleeving sheets of the main mold; 10. a die middle sleeve; 11. stamping a rear cushion block; 12. a three-pin lock pad; 13. punching a mold needle; 14. a punch rod main body; 15. punching a rod sleeve; 16. punching a mould shell; 17. punching a mold core; 18. a spring; 19. a boss; 20. a hemispherical groove; 21. a long groove; 22. and a ball.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easy to understand, the invention is further described with reference to the figures and the specific embodiments.
As shown in fig. 1 to 8, the guide pin cold heading processing technology provided by the invention is characterized in that six sets of forging dies are used for cold heading forming in sequence, wherein the six sets of forging dies are respectively a first section die, a second section die, a third section die, a fourth section die, a fifth section die and a sixth section die.
The six sets of forging splitting dies are formed by cold heading as follows:
step 1: the rod-shaped blank enters the first set of sectional die and is formed into a first intermediate material through cold heading of a cold heading machine, the first intermediate material is in a cylindrical structure formed by cold heading at the head of the guide pin, and the diameter of one end of the first intermediate material is larger than that of the other end of the first intermediate material after the first sectional die is subjected to cold heading.
Step 2: and the first intermediate material is filled into the second set of sectional die and is formed into a second intermediate material through cold heading of a cold heading machine, the second intermediate material is further extruded at the head position of the guide pin, the outer diameter of the cylindrical structure is further enlarged, and the second set of sectional die is used for realizing further cold heading forming on the basis of the cold heading of the first set of sectional die so that the second intermediate material is further deformed at the head position of the guide pin.
And step 3: and (3) filling the intermediate material II into a third set of sectional die, and forming the intermediate material III through cold heading by a cold header, wherein the intermediate material III is formed at the head part of the guide pin to be in a round table shape, the intermediate material III is further deformed, and a groove is formed on the end surface of the head part of the guide pin.
And 4, step 4: and (3) filling the intermediate material III into a fourth set of sectional dies, and forming the intermediate material IV by cold heading through a cold heading machine, so that the groove formed by the intermediate material IV in the intermediate material III is further enlarged.
And 5: and (4) filling the intermediate material IV into a fifth set of sectional die, and forming an intermediate material V through cold heading by a cold header, wherein the intermediate material V is formed into a cylindrical structure at the head part of the guide pin.
Step 6: and (4) filling the middle material five into a sixth set of sectional die, forming the middle material five into the guide pin through cold heading by a cold heading machine, forming the outer side wall of the cylindrical structure in the middle of the middle material five into a hexagonal structure through cold heading, extruding the end surface of the cylindrical structure, and realizing machining and forming the guide pin.
Through above-mentioned step cold-heading shaping uide pin, ensure to realize processing the uide pin through the cold-heading mode, ensure the fashioned qualification rate of cold-heading, effectively practice thrift processing material to improve the production efficiency of uide pin.
In the six sets of segmented molds, the structures of the first segmented mold, the second segmented mold, the third segmented mold, the fourth segmented mold, the fifth segmented mold and the sixth segmented mold are the same, and the molding mold cavities of the first segmented mold, the second segmented mold, the third segmented mold, the fourth segmented mold, the fifth segmented mold and the sixth segmented mold are consistent with the shapes of the corresponding middle material I, the middle material II, the middle material III, the middle material IV, the middle material V and the guide pin respectively.
The first section die, the second section die, the third section die, the fourth section die, the fifth section die and the sixth section die comprise a main die and a stamping die. The main die comprises a main die backseat 1, a main die shell 2, a main die inner die 3, a main die push rod 4 and a through rod 5, wherein the main die inner die 3 is arranged in the main die shell 2, the through rod 5 is provided with an inner cavity through which the main die backseat 1 penetrates to the main die inner die 3, and the main die push rod 4 penetrates into the main die backseat 1 and pushes the through rod 5. The stamping die comprises a stamping die seat 6, a stamping die rear cushion structure 7 and a stamping rod structure 8, and the main die inner die 3, the through rod 5, the stamping die seat 6 and the stamping rod structure 8 surround to form a forming die cavity.
The die punching rear cushion structure 7 and the punch rod structure 8 in the first section die, the second section die, the third section die and the fourth section die are all arranged in a column shape. In third segmentation mould, fourth segmentation mould, fifth segmentation mould, sixth segmentation mould, 3 in the master mode centre forms are provided with master mode cover sheet 9 towards die stamping one end, master mode cover sheet 9 is cyclic annular setting, and 9 lateral walls of master mode cover sheet are round platform form setting, master mode mould shell 2 is provided with the butt in 9 lateral walls of master mode cover sheet and the inclined plane of fixed master mode cover sheet 9, 3 in the master mode centre forms, 9 in the master mode centre forms, the master mode cover sheet, lead to excellent 5, die stamping seat 6 and die stamping structure 8 surround and form the shaping die cavity.
In addition, in the fifth section die and the sixth section die, the die rear cushion structure 7 includes a die middle sleeve 10 which is annular and is arranged on the die holder 6, a die rear cushion block 11 which is arranged in an inner cavity of the die middle sleeve 10, a three-pin lock cushion 12 which is arranged on the die holder 6, and three die needles 13 which are arranged through the three-pin lock cushion 12 and are abutted to the die rear cushion block 11. The punch rod structure 8 in the fifth segment die and the sixth segment die comprises a punch rod main body 14 fixed on the three-pin lock pad 12 and a punch rod sleeve 15 sleeved on the punch rod main body 14, the punch rod main body 14 abuts against the bottom surface of a groove formed by the middle material five, the punch rod sleeve 15 abuts against the end surface of the middle material five, and the die stamping rear cushion block 11 pushes the die stamping pin 13 and drives the punch rod sleeve 15 to move towards the main die direction. In the fifth subsection mould, the inner wall of the die holder 6 is provided with a step for abutting the three-pin lock pad 12 and fixing the position of the three-pin lock pad 12.
After a fourth subsection die is subjected to cold heading to form a fourth middle material and the fourth middle material is loaded into a fifth subsection die, the cold heading machine drives the punch die to move downwards, the punch rod main body 14 firstly abuts against the groove position of the fourth middle material and is extruded at the groove position of the fourth middle material, then the punch rod sleeve 15 abuts against the end face of the fourth middle material, and then the punch rod sleeve 15 is driven to move through the die rear cushion structure 7 and the punch pin 13, so that the fifth middle material is extruded and formed; and in the fifth set of segmented molds, the punch body 14 is effectively held by the three-pin lock pad 12.
In the sixth segmental die, the die holder 6 is divided into a die stamping shell 16 and a die stamping core 17, the die stamping core 17 can be abutted against the main die, one end of the die stamping core, which is far away from the main die, penetrates through the die stamping shell 16, the die stamping core 17 slides relative to the die stamping shell 16 along the axial direction of the die stamping shell 16, a spring 18 which pushes the die stamping core 17 to move in the direction far away from the die stamping shell 16 is arranged in the die stamping shell 16, two ends of the spring 18 are respectively abutted against the three-pin lock pad 12 and the die stamping core 17, a boss 19 for abutting against the end face of the die stamping shell 16 is arranged on the side wall of the die stamping core 17, and a limit component for controlling the sliding position of the die stamping core 17 relative.
The limiting component comprises a hemispherical surface groove 20 arranged on the inner wall of the punching mould shell 16, a long groove 21 arranged on the side wall of the punching mould core 17 and corresponding to the hemispherical groove, and a ball 22 arranged between the hemispherical surface groove 20 and the long groove 21, wherein the length direction of the long groove 21 is parallel to the moving direction of the punching mould core 17.
After the five-middle-material cold heading is finished, the five-middle-material cold heading is moved into a sixth sectional die, the cold heading machine drives the punch die to move downwards, the punch rod main body 14 abuts against the bottom surface of the five-middle-material cylindrical structure, the rear punch die shell 16 continues to move downwards to adapt to the change of the relative positions of the punch rod main body 14, the punch die core 17 and the punch die shell 16, the punch die shell 16 abuts against the punch die core 17 after moving relatively to drive the punch die core 17 to move downwards synchronously to extrude the outer side wall of the middle material, and therefore a hexagonal structure is formed at the position of the five outer; then the punching rod sleeve 15 is abutted against the four end faces of the intermediate material, and then the punching rod sleeve 15 is driven to move through the punching rod rear cushion structure and the punching die three pins, so that a finished product of the guide pin is formed by extrusion.
In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the purpose of clarity and convenience of description of the technical solutions, and thus, should not be construed as limiting the present invention.
As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The cold heading processing technology of the guide pin is characterized in that six sets of forging parting dies are used for sequentially forming the guide pin by cold heading, and the cold heading processing technology comprises the following steps:
step 1: the method comprises the following steps that a rod-shaped blank enters a first set of sectional dies and is formed into a first intermediate material through cold heading by a cold heading machine, and the first intermediate material is formed into a cylindrical structure through cold heading at the head part of a guide pin;
step 2: filling the first intermediate material into a second set of sectional dies, and forming into a second intermediate material through cold heading by a cold header, wherein the second intermediate material is further extruded at the head position of the guide pin, and the outer diameter of the cylindrical structure is further enlarged;
and step 3: filling the intermediate material II into a third set of sectional die, and forming the intermediate material III through cold heading by a cold header, wherein the intermediate material III is formed at the head part of the guide pin in a circular truncated cone shape, and a groove is formed in the end face of the intermediate material III at the head part of the guide pin;
and 4, step 4: filling the intermediate material III into a fourth set of sectional dies, and forming the intermediate material IV by cold heading through a cold heading machine, so that the groove formed by the intermediate material IV in the intermediate material III is further enlarged;
and 5: filling the intermediate material IV into a fifth set of sectional die, and forming the intermediate material V by cold heading through a cold header, wherein the intermediate material V is formed into a cylindrical structure at the head part of the guide pin;
step 6: filling the intermediate material five into a sixth set of sectional dies, and forming the intermediate material five into a guide pin through cold heading by a cold heading machine, namely, cold heading the cylindrical structure in the intermediate material 5 into a hexagonal structure, and extruding the end surface of the cylindrical structure to realize processing and forming of the guide pin;
the first section die, the second section die, the third section die, the fourth section die, the fifth section die and the sixth section die are identical in structure, and the molding die cavities of the first section die, the second section die, the third section die, the fourth section die, the fifth section die and the sixth section die are consistent in shape with the corresponding first middle material, the second middle material, the third middle material, the fourth middle material, the fifth middle material and the guide pin respectively.
2. The cold heading process for a guide pin as claimed in claim 1, wherein the first, second, third, fourth, fifth and sixth segmented dies each comprise a master die and a punch die; the main die comprises a main die backseat (1), a main die shell (2), a main die internal die (3), a main die push rod (4) and a through rod (5), wherein the main die internal die (3) is arranged in the main die shell (2), the through rod (5) is provided with an inner cavity through which the main die backseat (1) penetrates into the main die internal die (3), and the main die push rod (4) penetrates into the main die backseat (1) and pushes the through rod (5); the stamping die comprises a stamping die seat (6), a stamping die rear cushion structure (7) and a stamping rod structure (8), wherein the main die inner die (3), the through rod (5), the stamping die seat (6) and the stamping rod structure (8) are surrounded to form a forming die cavity.
3. The cold heading processing process for the guide pin as claimed in claim 2, wherein the die rear cushion structure (7) and the punch rod structure (8) in the first section die, the second section die, the third section die and the fourth section die are arranged in a columnar shape; in third segmentation mould, fourth segmentation mould, fifth segmentation mould, sixth segmentation mould, master mode centre form (3) are provided with master mode cover sheet (9) towards die stamping one end, master mode cover sheet (9) are cyclic annular setting, and master mode cover sheet (9) lateral wall is the setting of round platform form, master mode mould shell (2) are provided with the butt in the inclined plane of master mode cover sheet (9) lateral wall and fixed master mode cover sheet (9), master mode centre form (3), master mode cover sheet (9), logical stick (5), die stamping seat (6) and towards excellent structure (8) surround and form the shaping die cavity.
4. The cold heading processing process for the guide pin according to claim 2, wherein in the fifth sectional die and the sixth sectional die, the die rear cushion structure (7) comprises a die middle sleeve (10) which is annular and is arranged on a die holder (6), a die rear cushion block (11) which is arranged in an inner cavity of the die middle sleeve (10), a three-pin lock cushion (12) which is arranged on the die holder (6), and three die needles (13) which penetrate through the three-pin lock cushion (12) and abut against the die rear cushion block (11); the punching rod structure (8) comprises a punching rod main body (14) fixed on the three-needle lock pad (12) and a punching rod sleeve (15) sleeved on the punching rod main body (14), the punching rod main body (14) abuts against the bottom surface of a groove formed by the middle material five, the punching rod sleeve (15) abuts against the end surface position of the middle material five, and the punching die rear cushion block (11) pushes the punching needle (13) and drives the punching rod sleeve (15) to move towards the main die direction.
5. The cold-heading processing technology for the guide pin according to claim 4, wherein in the fifth-segment die, the inner wall of the die holder (6) is provided with a step for abutting the three-pin lock pad (12) and fixing the position of the three-pin lock pad (12), in the sixth-segment die, the die holder (6) is divided into a die stamping shell (16) and a die core (17), the die core (17) can abut against the main die, one end of the die core departing from the main die penetrates through the die stamping shell (16), the die core (17) slides relative to the die stamping shell (16) along the axial direction of the die stamping shell (16), a spring (18) for pushing the die core (17) to move in the direction departing from the die stamping shell (16) is arranged in the die stamping shell (16), two ends of the spring (18) abut against the three-pin lock pad (12) and the die core (17) respectively, a boss (19) for abutting against the end face of the die stamping shell (16) is arranged on the side wall of the die core (17), and a limiting component for controlling the sliding position of the punching die core (17) relative to the punching die shell (16) is arranged between the punching die core (17) and the punching die shell (16).
6. The cold heading processing process for the guide pin as claimed in claim 5, wherein the limiting assembly comprises a hemispherical surface groove (20) arranged on the inner wall of the die stamping shell (16), a long groove (21) arranged on the side wall of the die stamping core (17) and corresponding to the hemispherical groove, and a ball (22) arranged between the hemispherical surface groove (20) and the long groove (21), and the length direction of the long groove (21) is parallel to the moving direction of the die stamping core (17).
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| CN202011291388.7A CN112517831A (en) | 2020-11-18 | 2020-11-18 | Guide pin cold heading processing technology |
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| CN202011291388.7A CN112517831A (en) | 2020-11-18 | 2020-11-18 | Guide pin cold heading processing technology |
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- 2020-11-18 CN CN202011291388.7A patent/CN112517831A/en active Pending
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| CN104368740A (en) * | 2014-09-29 | 2015-02-25 | 太仓一标精密模具有限公司 | Movable main mold core structure |
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| CN209139729U (en) * | 2018-10-12 | 2019-07-23 | 嘉善宝岛模具厂(普通合伙) | One kind is into return water bolt forming die |
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Application publication date: 20210319 |