CN210676793U - Cold heading forming device of double-step triangular-tooth bolt - Google Patents
Cold heading forming device of double-step triangular-tooth bolt Download PDFInfo
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- CN210676793U CN210676793U CN201920828013.6U CN201920828013U CN210676793U CN 210676793 U CN210676793 U CN 210676793U CN 201920828013 U CN201920828013 U CN 201920828013U CN 210676793 U CN210676793 U CN 210676793U
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Abstract
The utility model discloses a cold-heading forming device of two step triangle tooth bolts, this cold-heading forming device include the cold heading machine, and install in mould subassembly on the cold heading machine. The utility model discloses can cooperate the disposable forming part processing of accomplishing two step triangle tooth bolts with many cold-heading stations to guarantee that the size of forming part is more stable, replaced the current twice machine tooling production mode of this forming part, save a large amount of manual work costs, can save 25% raw and other materials simultaneously, in addition, the direct cold-heading of this forming part takes shape, can guarantee that the metal lines of forming part is complete, has improved the intensity of forming part.
Description
Technical Field
The utility model relates to a machine-building field, specific is a cold-heading forming device of two-step triangle tooth bolt.
Background
Two step triangle tooth bolts are a car fastener, as shown in fig. 1, it includes a main pole portion 1, the upper end of main pole portion 1 is connected with head 3 through first flange portion 2, second flange portion 4 has on the main pole portion 1, and the lower extreme of main pole portion 1 is connected with triangle tooth portion 6 through third flange portion 5, triangle tooth portion has triangle tooth.
Because this two step triangle tooth bolt structures is comparatively complicated, so this bolt forming part adopts the mode production of machining at present, however, the mode of production of machining not only efficiency is lower, extravagant raw and other materials, and the fibrous tissue of the forming part pole portion that the machine tooling produced has the phenomenon of cutting off simultaneously, influences the intensity of forming part.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the embodiment of the utility model provides a cold-heading forming device of two-step triangle tooth bolt for solve at least one of above-mentioned problem.
The embodiment of the application discloses: the utility model provides a cold-heading forming device of two step triangle tooth bolts, includes the cold heading machine, and install in mould subassembly on the cold heading machine, mould subassembly includes:
the first die is used for reducing and bundling the wire blank to obtain a head parison and a main rod parison which are connected up and down;
the second die is used for forming the head parison into a hexagonal head parison and a first flange parison which are connected up and down;
a third mold for molding the hexagonal head parison into a hexagonal head;
a fourth mold for molding the first flange part parison into a first flange part and for molding the lower section of the main rod part parison into a triangular tooth part;
a fifth mold for molding a part of the remaining main rod part parison into a second flange part;
and a sixth mold for molding a third flange part from a part of the remaining stem part parison to obtain a molded article of the two-step triangular tooth bolt, wherein the third flange part is located above and adjacent to the triangular tooth part.
Furthermore, the second die is also used for forming a positioning groove at the bottom of the main rod part parison, so that the third die, the fourth die, the fifth die and the sixth die can be used for positioning the processed wire blank in a rotation-proof manner through the positioning groove.
Further, the first mold, the second mold, the third mold and the fourth mold each include a main mold and a punch mold which are correspondingly arranged, wherein:
the main die comprises a main die shell, a main die core and a main die ejector pin, the main die core is arranged in the main die shell, the main die core is provided with a main die cavity with an opening facing the stamping die, and the main die ejector pin can penetrate into the main die cavity from the bottom of the main die core;
the stamping die comprises a stamping die shell, a stamping die core, a stamping die spring and a stamping die ejector pin, wherein the stamping die core is fixed in the stamping die shell, the bottom of the stamping die core is provided with a stamping die cavity opposite to the main die cavity, the stamping die spring and the stamping die ejector pin are connected up and down and are accommodated in a cavity in the upper section of the stamping die core in a grounding mode, and the stamping die ejector pin penetrates into the stamping die cavity.
Furthermore, the main mould kernel of the fourth mould is a first mould kernel block and a second mould kernel block which are combined in an upper-lower two-section mode, the first mould kernel block and the second mould kernel block can be aligned with the main rod part parison, so that the main rod part parison is processed by the fourth mould to obtain a first rod section corresponding to the first mould kernel block and a second rod section corresponding to the second mould kernel block, and the fifth mould is used for forming the second rod section out of the second flange part.
Furthermore, the fifth mold and the sixth mold are of split-type mold opening and closing structures, so that the molded second flange part or the molded third flange part can be separated from the fifth mold or the sixth mold.
Further, the fifth die and the sixth die each include a main die and a punch die which are correspondingly arranged, wherein:
the main die comprises a main die shell, a main die core, a main die ejector pin, an opening and closing die shell and an opening and closing die core, wherein the main die core is arranged in the main die shell, the main die ejector pin can penetrate into a main die cavity of the main die core from the bottom of the main die core, the opening and closing die shell is fixedly arranged in the main die shell above the main die core, and a pair of mutually matched opening and closing die cores can slide in a conical inner hole formed by the surrounding of the opening and closing die shell, so that an opening and closing die cavity communicated with the main die cavity can be formed after the end with the smaller aperture of the conical inner hole is combined, and the opening and closing die cavity can be separated when the end with the smaller aperture of the conical inner hole slides to the end with the larger aperture of the conical inner hole, and a second flange part or a third flange part after forming can be separated from the fifth die or;
the stamping die comprises a stamping die shell, a stamping die core, a stamping die spring and a stamping die ejector pin, wherein the stamping die core is sleeved in the stamping die shell, the lower end of the stamping die core extends out of the stamping die shell, so that a stamping die cavity at the bottom of the stamping die core can be communicated with the opening and closing die cavity when the main die and the stamping die are assembled, the stamping die spring and the stamping die ejector pin are connected up and down and are accommodated in a cavity in the upper section of the stamping die core in a grounding mode, and the stamping die ejector pin penetrates into the.
Furthermore, a passage is arranged at the lower section of the main die core, the main die ejector pin can penetrate into the main die cavity from the passage, and an ejector pin protective sleeve capable of sliding in the passage is arranged on the main die ejector pin, so that when the ejector pin moves towards the direction of the main die cavity and is ejected into the main die cavity, the ejector pin protective sleeve can be abutted against the bottom of the main die core, and further the stroke of the main die ejector pin is limited.
Furthermore, the die ejector pin is provided with a die cushion block which can slide in the cavity, so that when the ejector pin moves towards the die cavity and pushes into the die cavity, the die cushion block can be abutted against the bottom of the cavity, and further the stroke of the die ejector pin is limited.
The utility model has the advantages as follows:
1. the utility model provides a cold-heading forming device of two-step triangle tooth bolt can be with the disposable forming part processing of accomplishing two-step triangle tooth bolt of many cold-heading station cooperations to guarantee that the size of forming part is more stable, replaced the current twice machining production mode of this forming part, save a large amount of manual work costs, can save 25% raw and other materials simultaneously, in addition, the direct cold-heading of this forming part takes shape, can guarantee that the metal lines of forming part is complete, the intensity of forming part has been improved.
2. The utility model provides a cold-heading forming device of two-step triangle tooth bolt, the bellying of the master mode thimble of second mould is used for the bottom shaping of mobile jib goes out a constant head tank, the master mode thimble of third mould, fourth mould, fifth mould and sixth mould prevents through the gomphosis location of its bellying and constant head tank that the master mode thimble rotates, and then prevents that the formed part from rotating, has guaranteed that the clamp of formed part gets stably.
3. The utility model provides a cold-heading forming device of two-step triangle tooth bolt reduces the stroke length of fundamental mode thimble, makes through thimble protective sheath and die cushion simultaneously fundamental mode thimble or the stable support of die thimble in the passageway or hold the intracavity, increase the stability and the structural strength of fundamental mode thimble and die thimble.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a double-step triangular bolt;
fig. 2 is a schematic structural view of a mold assembly according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a wire blank in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a semi-finished product after being processed by the first mold in the embodiment of the present invention;
fig. 5 is a schematic structural diagram of a semi-finished product after processing by the second mold in the embodiment of the present invention;
fig. 6 is a schematic structural diagram of a semi-finished product after being processed by a third mold in the embodiment of the present invention;
fig. 7 is a schematic structural diagram of a semi-finished product after being processed by a fourth mold in the embodiment of the present invention;
fig. 8 is a schematic structural diagram of a semi-finished product after being processed by a fifth mold in the embodiment of the present invention;
fig. 9 is a schematic structural view of a formed part obtained after processing of a sixth mold in the embodiment of the present invention;
fig. 10 is a schematic structural view of a fourth mold according to an embodiment of the present invention;
fig. 11 is a schematic structural view of a fifth mold in the embodiment of the present invention;
reference numerals of the above figures:
1. a main rod portion; 2. a first flange portion; 3. a hexagonal head; 4. a second flange portion; 5. a third flange portion; 6. a triangular tooth portion; 7. positioning a groove;
10. performing primary molding; 11. a main formwork; 12. a main mold core; 13. a main die thimble; 14. opening and closing the formwork; 15. opening and closing the mold core; 16. A channel; 17. a thimble protecting sleeve;
20. punching a die; 21. punching a mould shell; 22. punching a mold core; 23. stamping a spring; 24. punching a thimble; 25. a cavity; 26. punching a cushion block;
100. a first mold; 200. a second mold; 300. a third mold; 400. a fourth mold; 401. a first mold core block; 402. a second mold core block; 500. a fifth mold; 600. a sixth mold; 1000. and (3) wire blank.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model discloses a cold-heading technology processing double step triangle tooth bolt is particularly based on a cold-heading forming device.
Referring to fig. 2, 10 and 11 in combination with fig. 1, the cold heading apparatus includes a cold heading machine, and a die assembly mounted on the cold heading machine, the die assembly including:
a first die 100, as shown in fig. 3 and 4, the first die 100 is used for reducing and bundling the wire blank 1000 to obtain a head parison and a main stem parison connected up and down;
a second mold 200, as shown in fig. 5, the second mold 200 forming the head parison into a hexagonal head parison and a first flange parison connected up and down;
a third mold 300, as shown in fig. 6, the third mold 300 being used to form the hexagonal head parison into a hexagonal head 3;
a fourth mold 400, as shown in fig. 7, for molding the first flange part parison into the first flange part 2 and for molding the lower section of the main rod part parison into the triangular tooth part 6, the fourth mold 400 being used for molding the first flange part parison into the first flange part 2;
a fifth mold 500, as shown in fig. 8, the fifth mold 500 being used to mold a portion of the remaining main stem parison into the second flange portion 4;
and a sixth mold 600, as shown in fig. 9, the sixth mold 600 is used for molding a third flange part 5 from a part of the remaining main rod parison, so as to obtain a molded article of the double-step triangular tooth bolt, wherein the third flange part 5 is located above the triangular tooth part 6 and adjacent to the triangular tooth part 6.
Borrow by above-mentioned cold-heading device, make the utility model discloses can be with the disposable forming part processing of accomplishing two step triangle tooth bolts of many cold-heading station cooperations to guarantee that the size of forming part is more stable, replaced the current twice machining production mode of this forming part, save a large amount of manual work costs, can save 25% raw and other materials simultaneously, in addition, the direct cold-heading of this forming part takes shape, can guarantee that the metal lines of forming part is complete, improved the intensity of forming part.
Specifically, please refer to fig. 2, 10 and 11. Take the fourth mold 400 shown in fig. 10 as an example. The first mold 100, the second mold 200, the third mold 300, and the fourth mold 400 each include a main mold 10 and a punch 20, which are correspondingly disposed, wherein: the main mold 10 includes a main mold shell 11, a main mold core 12 and a main mold thimble 13, the main mold core 12 is disposed in the main mold shell 11, the main mold core 12 has a main mold cavity with an opening facing the die 20, and the main mold thimble 13 can penetrate into the main mold cavity from the bottom of the main mold core 12; the stamping die 20 comprises a stamping die shell 21, a stamping die core 22, a stamping die spring 23 and a stamping die thimble 24, the stamping die core 22 is fixed in the stamping die shell 21, the bottom of the stamping die core is provided with a stamping die cavity opposite to the main die cavity, the stamping die spring 23 and the stamping die thimble 24 are connected up and down and accommodated in a cavity 25 in the upper section of the stamping die core 22, and the stamping die thimble 24 penetrates into the stamping die cavity.
Referring to fig. 10, in a preferred embodiment, the main mold core 12 of the fourth mold 400 is a first mold core block 401 and a second mold core block 402 which are combined in an up-down two-section manner, the first mold core block 401 and the second mold core block 402 can bundle the main rod part parison, so that the main rod part parison is processed by the fourth mold 400 to obtain a first rod section corresponding to the first mold core block 401 and a second rod section corresponding to the second mold core block 402, and the fifth mold 500 is used for molding the second rod section into the second flange part 4. Briefly, the portion of the fourth master mold 10 for forming the master rod portion 1 is a two-step structure, which facilitates adjusting the material volume of the following fifth mold 500 in forming the second flange portion 4 by adjusting the thickness of the two-step structure.
Since the double-step triangular thread bolt has a plurality of flange portions (the second flange portion 4 and the third flange portion 5), in order to facilitate demolding after cold heading forming of the second flange portion 4 and the third flange portion 5, the fifth mold 500 and the sixth mold 600 may adopt a split type mold opening and closing structure, so that the formed second flange portion 4 or the formed third flange portion 5 can be separated from the fifth mold 500 or the sixth mold 600.
Referring to fig. 11, taking a fifth mold as an example, the fifth mold 500 and the sixth mold 600 each include a main mold 10 and a punch 20 disposed correspondingly, wherein: the main mold 10 comprises a main mold shell 11, a main mold core 12, a main mold thimble 13, an opening and closing mold shell 14 and an opening and closing mold core 15, the main mold core 12 is disposed inside the main mold shell 11, the main mold thimble 13 can penetrate into the main mold cavity of the main mold core 12 from the bottom of the main mold core 12, the opening and closing mould shell 14 is fixedly arranged above the main mould core 12 and positioned in the main mould shell 11, a pair of mutually matched opening and closing mould cores 15 can slide in a conical inner hole formed by enclosing the opening and closing mould shell 14, so that an opening-closing die cavity communicated with the main die cavity can be formed after the ends with smaller aperture of the conical inner holes are combined, and can be separated when the end with smaller aperture of the conical inner hole slides to the end with larger aperture of the conical inner hole, so that the formed second flange part 4 or third flange part 5 is separated from the fifth mold 500 or sixth mold 600. The stamping die 20 comprises a stamping die shell 21, a stamping die core 22, a stamping die spring 23 and a stamping die thimble 24, the stamping die core 22 is sleeved in the stamping die shell 21, the lower end of the stamping die core extends out of the stamping die shell 21 so that a stamping die cavity at the bottom of the stamping die core can be communicated with the opening and closing die cavity when the main die 10 and the stamping die 20 are assembled, the stamping die spring 23 and the stamping die thimble 24 are connected up and down and are accommodated in a cavity 25 in the upper section of the stamping die core 22, and the stamping die thimble 24 penetrates into the stamping die cavity.
In the prior art, workpieces with the characteristics of large middle and small two ends are machined by turning or twice cold heading by a die spotting press, so that the process is complex and the efficiency is low. Use the utility model discloses the two-step triangle tooth bolt that will make is the example, and its king post portion 1 has two flange steps (second flange portion 4 and third flange portion 5 promptly), and dimensional requirement is higher moreover, and 1 lower extreme of king post portion is special-shaped triangle tooth portion 6 again, has increased the mould design degree of difficulty especially the cross the mould degree of difficulty. The utility model discloses a two times open and shut the compound die station (be fifth mould 500 and sixth mould 600) and take shape the formed part, the formed part size is guaranteed by each mould structure to guarantee that the size of formed part is more stable, cross the mould between each mould can be accomplished by clip 700, six mould six dashes, and production speed can reach 50 per minute. Moreover, the design of the fifth mold 500 and the sixth mold 600 replaces two times of machining, so that a large amount of labor cost is saved, and meanwhile, 25% of raw materials can be saved.
In a preferred embodiment, the lower section of the main mold core 12 has a channel 16, the main mold thimble 13 can penetrate into the main mold cavity through the channel 16, and the main mold thimble 13 has a thimble protecting sleeve 17 capable of sliding in the channel 16, so that when the thimble moves towards the main mold cavity and is pushed into the main mold cavity, the thimble protecting sleeve 17 can abut against the bottom of the main mold core 12, thereby limiting the stroke of the main mold thimble 13. Preferably, the die ejector pin 24 has a die pad 26 slidable in the cavity 25, so that when the ejector pin moves in the direction of the die cavity and is pushed into the die cavity, the die pad 26 can abut against the bottom of the cavity 25, thereby limiting the stroke of the die ejector pin 24. Therefore, when the cold heading device works, the stroke length of the main die ejector pin 13 can be reduced, and meanwhile, the main die ejector pin 13 or the die ejector pin 24 is stably supported in the channel 16 or the cavity 25 through the ejector pin protective sleeve 17 and the die cushion block 26, so that the stability and the structural strength of the main die ejector pin 13 and the die ejector pin 24 are improved.
In the process of processing the third die 300, the fourth die 400, the fifth die 500 and the sixth die 600, since the triangular tooth portion 6 with a triangular cross section is located at the side of the main die 10 of the four dies when the formed part is formed by cold heading, the overmould requirement of the formed part is high, and in order to prevent the formed part from rotating when being clamped, in a preferred embodiment, the second die 200 is further used for forming a positioning groove 7 at the bottom of the main rod portion parison, so that the third die 300, the fourth die 400, the fifth die 500 and the sixth die 600 can position the processed wire blank 1000 in a rotation-proof manner through the positioning groove 7. Specifically, the end faces of the main mold ejector pins 13 of the second mold 200, the third mold 300, the fourth mold 400, the fifth mold 500 and the sixth mold 600 are provided with a protruding portion, wherein the protruding portion of the main mold ejector pin 13 of the second mold 200 is used for forming a positioning groove 7 in the bottom of the main rod, and the main mold ejector pins 13 of the third mold 300, the fourth mold 400, the fifth mold 500 and the sixth mold 600 are positioned through the embedding of the protruding portion and the positioning groove 7, so that the rotation of the main mold ejector pins 13 is prevented, the rotation of the formed part is prevented, and the clamping stability of the formed part is ensured. For example, the positioning groove 7 may be in a straight shape, and correspondingly, the protrusion is also in a straight shape.
Referring to fig. 3, 4, 5, 6, 7, 8 and 9 (in fig. 5 to 9, the upper supplementary reference is shown as a top view of the wire blank 1000 or the molded part obtained after processing in the corresponding step, and the lower supplementary reference is shown as a bottom view of the wire blank 1000 or the molded part obtained after processing in the corresponding step), the embodiment of the present application further provides a method for manufacturing a two-step triangular tooth bolt, which includes the following steps:
s1: cutting the wire to obtain a wire blank 1000;
s2: performing cold heading processing on the wire blank 1000 by using a cold heading forming device to obtain a formed part of the double-step triangular-tooth bolt;
s3: twisting triangular teeth on the triangular tooth part 6 of the molding part;
wherein the cold heading process comprises:
s2.1: the wire blank 1000 is reduced in diameter to obtain a head parison and a main stem parison connected up and down.
In this step, the first die 100 may be selected for machining, specifically, the movable die 20 of the first die 100 is selected from the movable die 20 with a spring structure, during the working process, the movable die 20 firstly encases a part of the material, the die ejector pin 24 pushes the material to bunch out of the small rod diameter, and after the bunching of the rod is finished, the die 20 starts to cold-heading the shape of the hexagonal head 3.
S2.2: the head parison is formed into a hexagonal head parison and a first flange parison which are connected up and down.
In this step, the second mold 200 may be selected for processing, specifically, the whole punch 20 of the second mold 200 is forward in operation, the material forms the shape of the head 3 in the punch 20, and the main mold thimble 13 forms the linear positioning groove 7 at the tail of the formed part to prepare for processing the third mold 300;
s2.3: the hexagonal head parison is formed into a hexagonal head 3.
In this step, the third mold 300 may be selected for processing, specifically, the punch 20 of the third mold 300 is entirely forward in operation, and the material bundles the shape of the hexagonal head 3 of the molded article in the punch 20;
s2.4: the first flange part parison is formed into the first flange part 2 and is used to form the lower section of the main stem part parison into the triangular teeth part 6.
In this step, the fourth die 400 may be selected for machining, specifically, the whole punch 20 of the fourth die 400 advances in operation, the punch 20 side cold-heading forms the first flange part 2, and the main die 10 side bundles the lower triangular tooth part 6 of the formed part;
s2.5: a portion of the remaining main stem parison is formed into a second flange portion 4.
In this step, the fifth mold 500 may be selected for processing, specifically, the punch 20 of the fifth mold 500 is integrally moved forward in operation, the punch 20 protects the hexagonal head 3 and the first flange 2 of the formed part, and the main mold 10 adopts a split open-close mold structure to form the second flange 4 in the middle of the rod;
s2.6: and forming a third flange part 5 from a part of the remaining main rod part parison, thereby obtaining a formed part of the double-step triangular tooth bolt, wherein the third flange part 5 is positioned above the triangular tooth part 6 and adjacent to the triangular tooth part 6.
In this step, the sixth mold 600 may be selected for processing, specifically, the stamping die 20 of the sixth mold 600 is integrally moved forward in operation, the stamping die 20 protects the hexagonal head 3 and the first flange 2 of the formed part, and the main mold 10 adopts a split open-close mold structure to form a third flange in the middle of the rod part; upon termination of the die 20 movement to complete the cold heading desired size of the molded part, the master ejector pin 13 ejects the molded part out of the master 10.
The cold heading processing method avoids the mold galling caused by the mode of reshaping the first flange part 2 of the formed part by the intensive triangular teeth. Meanwhile, before the third die 300 performs cold heading on the triangular tooth part 6, the rod diameter of the wire blank 1000 part corresponding to the triangular tooth part 6 is bundled from a front station, so that the effective length of the tooth pattern can be increased as much as possible, and the ineffective length of the head part 3 is reduced. It should be noted that, in order to reduce the material work hardening and ensure the smooth binding of the triangular teeth 6 of the molded part, the material of the wire rod may be selected to have a small wire diameter or a rod diameter of the open type extrusion molded part.
Preferably, after the step S3, the method further comprises the steps of performing heat treatment on the formed part, coating an anticorrosive material and waxing.
The present invention has been explained by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (8)
1. The utility model provides a cold-heading forming device of two-step triangle tooth bolt, cold-heading forming device includes the cold heading machine, and install in mould subassembly on the cold heading machine, its characterized in that, mould subassembly includes:
the first die is used for reducing and bundling the wire blank to obtain a head parison and a main rod parison which are connected up and down;
the second die is used for forming the head parison into a hexagonal head parison and a first flange parison which are connected up and down;
a third mold for molding the hexagonal head parison into a hexagonal head;
a fourth mold for molding the first flange part parison into a first flange part and for molding the lower section of the main rod part parison into a triangular tooth part;
a fifth mold for molding a part of the remaining main rod part parison into a second flange part;
and a sixth mold for molding a third flange part from a part of the remaining stem part parison to obtain a molded article of the two-step triangular tooth bolt, wherein the third flange part is located above and adjacent to the triangular tooth part.
2. The cold heading forming device for the double-step triangular bolt according to claim 1, wherein: the second die is also used for forming a positioning groove at the bottom of the main rod part parison, so that the third die, the fourth die, the fifth die and the sixth die can be used for positioning the processed wire blank in a rotation-proof manner through the positioning groove.
3. The cold heading forming device for the double-step triangular bolt according to claim 1, wherein: the first mould, the second mould, the third mould and the fourth mould comprise a main mould and a stamping mould which are correspondingly arranged, wherein:
the main die comprises a main die shell, a main die core and a main die ejector pin, the main die core is arranged in the main die shell, the main die core is provided with a main die cavity with an opening facing the stamping die, and the main die ejector pin can penetrate into the main die cavity from the bottom of the main die core;
the stamping die comprises a stamping die shell, a stamping die core, a stamping die spring and a stamping die ejector pin, wherein the stamping die core is fixed in the stamping die shell, the bottom of the stamping die core is provided with a stamping die cavity opposite to the main die cavity, the stamping die spring and the stamping die ejector pin are connected up and down and are accommodated in a cavity in the upper section of the stamping die core in a grounding mode, and the stamping die ejector pin penetrates into the stamping die cavity.
4. The cold heading forming device for the double-step triangular bolt according to claim 3, wherein: the master mould benevolence of fourth mould is first mould benevolence piece and the second mould benevolence piece of two segmentation combinations from top to bottom, first mould benevolence piece and second mould benevolence piece can be right mobile jib portion parison is whole restrainted, so that mobile jib portion parison warp obtain after the fourth mould processing with the first pole section that first mould benevolence piece corresponds, and with the second pole section that second mould benevolence piece corresponds, the fifth mould be used for with the shaping of second pole section is gone out the second flange portion.
5. The cold heading forming device for the double-step triangular bolt according to claim 1, wherein: the fifth mold and the sixth mold are of split type mold opening and closing structures, so that the second flange part or the third flange part after molding can be conveniently separated from the fifth mold or the sixth mold.
6. The cold heading forming device for the double-step triangular bolt according to claim 5, wherein: the fifth mould and the sixth mould comprise a main mould and a stamping mould which are correspondingly arranged, wherein:
the main die comprises a main die shell, a main die core, a main die ejector pin, an opening and closing die shell and an opening and closing die core, wherein the main die core is arranged in the main die shell, the main die ejector pin can penetrate into a main die cavity of the main die core from the bottom of the main die core, the opening and closing die shell is fixedly arranged in the main die shell above the main die core, and a pair of mutually matched opening and closing die cores can slide in a conical inner hole formed by the surrounding of the opening and closing die shell, so that an opening and closing die cavity communicated with the main die cavity can be formed after the end with the smaller aperture of the conical inner hole is combined, and the opening and closing die cavity can be separated when the end with the smaller aperture of the conical inner hole slides to the end with the larger aperture of the conical inner hole, and a second flange part or a third flange part after forming can be separated from the fifth die or;
the stamping die comprises a stamping die shell, a stamping die core, a stamping die spring and a stamping die ejector pin, wherein the stamping die core is sleeved in the stamping die shell, the lower end of the stamping die core extends out of the stamping die shell, so that a stamping die cavity at the bottom of the stamping die core can be communicated with the opening and closing die cavity when the main die and the stamping die are assembled, the stamping die spring and the stamping die ejector pin are connected up and down and are accommodated in a cavity in the upper section of the stamping die core in a grounding mode, and the stamping die ejector pin penetrates into the.
7. The cold-heading forming device for the double-step triangular-tooth bolt according to claim 3 or 6, wherein: the lower section of the main die core is provided with a channel, the main die ejector pin can penetrate into the main die cavity from the channel, and the main die ejector pin is provided with an ejector pin protective sleeve capable of sliding in the channel, so that when the ejector pin moves towards the direction of the main die cavity and is ejected into the main die cavity, the ejector pin protective sleeve can be abutted against the bottom of the main die core, and further the stroke of the main die ejector pin is limited.
8. The cold-heading forming device for the double-step triangular-tooth bolt according to claim 3 or 6, wherein: the die ejector pin is provided with a die cushion block which can slide in the accommodating cavity, so that when the ejector pin moves towards the die cavity and pushes into the die cavity, the die cushion block can be abutted against the bottom of the accommodating cavity, and further the stroke of the die ejector pin is limited.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920828013.6U CN210676793U (en) | 2019-06-04 | 2019-06-04 | Cold heading forming device of double-step triangular-tooth bolt |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114074168A (en) * | 2020-08-19 | 2022-02-22 | 宾科汽车紧固件（昆山）有限公司 | Bolt forming method and cold heading device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114074168A (en) * | 2020-08-19 | 2022-02-22 | 宾科汽车紧固件（昆山）有限公司 | Bolt forming method and cold heading device |
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