Cold header and machining method for pin shaft

Abstract

The invention discloses a cold heading machine and a machining method for a pin shaft, and relates to the field of cold heading machines, the cold heading machine comprises a cold heading shell, a driving assembly, a straightening assembly, a transferring assembly, a plurality of cold heading heads and a cold heading die are arranged in the cold heading shell, die cavities corresponding to the plurality of cold heading heads are formed in the cold heading die, and a feeding hole is formed in the cold heading die; the transfer assembly comprises a plurality of transfer units, each transfer unit comprises a transfer block, transfer holes are formed in the transfer blocks, all the transfer blocks in the transfer assembly can rotate synchronously, and when all the transfer blocks rotate to enable the transfer holes to be in a straight line, the transfer blocks can move, so that all the transfer holes are connected end to end. According to the utility model, the structure is compact, the sequential movement of the blanks among the die cavities is ensured, the blanks are extruded and formed in sequence, the distances among a plurality of stations are reduced when the blanks are transferred, the blanks are transferred more stably, the structure is more reliable, the blanks are limited and prevented from deviating when entering the die cavities, and the processing precision and the production efficiency are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cold header, in particular to a cold header and a processing method for pin shaft. BACKGROUND

[0002] The cold header is a metal processing equipment based on the principle of cold plastic deformation, which applies high pressure to the metal blank through the die to produce plastic deformation at room temperature, thereby processing various fasteners. In the processing of pin shaft, the cold header realizes efficient production through multi-station continuous forming process. Different stations complete the cutting, upsetting, preforming, final forming and other processes in turn, and the blank is automatically transferred by the feeding mechanism to realize full-automatic continuous processing. The core of the equipment is composed of crank slider mechanism, indexing mechanism, die system and feeding device. The die system directly determines the shape of the product and needs to accurately control various parameters in the forming process according to the material properties.

[0003] The cold header in the prior art has the following defects:

[0004] In the prior art, the multiple stations of the cold header have a certain distance, and feeding equipment is needed for feeding. However, the distance between the multiple stations is short, the feeding equipment is relatively complex, the cost of the feeding equipment is high, and the material is prone to position misalignment when moving between the multiple stations, which reduces the cold heading processing precision.

[0005] Therefore, the present application provides a cold header and a processing method for pin shaft to meet the needs. SUMMARY

[0006] The purpose of the present application is to provide a cold header and a processing method for pin shaft, which is compact in structure, ensures the sequential movement of the blank between the various die cavities, and makes the blank be extruded and formed in turn. The distance between the multiple stations is reduced when the blank is transferred, the blank is more stable when transferred, the structure is more reliable, and the blank is limited when it enters the die cavity, preventing deviation, improving processing precision and production efficiency.

[0007] To achieve the above purpose, the present application provides the following technical scheme: a cold header, comprising a cold header shell, a driving assembly, a straightening assembly, a transfer assembly, a plurality of cold heading heads and a cold heading die are arranged in the cold header shell, and a die cavity is formed on the cold heading die corresponding to the plurality of cold heading heads;

[0008] The cold heading die is provided with a feeding hole, the transfer assembly comprises a plurality of transfer units, each transfer unit comprises a transfer block, the transfer block is provided with a transfer hole, all the transfer blocks in the transfer assembly can rotate synchronously, when all the transfer blocks rotate to make the transfer holes straight, the transfer blocks can move to make all the transfer holes connected end to end, and the billets in the transfer holes are transferred to the next transfer hole; when all the transfer blocks rotate to make the transfer holes parallel to each other, the corresponding transfer holes correspond to the mold cavities and the feeding hole;

[0009] The straightening assembly can straighten the metal wires and pass them into the feeding hole.

[0010] The cold heading die is provided with a plurality of ejector rods corresponding to the mold cavities, the ejector rods can push the billets in the mold cavities into the corresponding transfer holes.

[0011] Preferably, the transfer unit further comprises a rotating rod, a translation block, a rotating gear and a rotating rack, the rotating rod is fixedly installed on the transfer block, the rotating rod is rotatably connected to the translation block, the rotating gear is fixedly installed on the rotating rod, and when all the transfer holes are parallel to each other, the rotating rack is engaged with the rotating gear.

[0012] Preferably, the transfer assembly further comprises a pushing unit, a translation unit and a fixed shell, the fixed shell is fixedly installed on the cold heading shell, the translation unit comprises a translation rod, a plurality of translation springs, a translation cylinder and a moving block, the translation rod is fixedly installed in the fixed shell, the translation rod is in a rectangular shape, the moving block is sleeved on the translation rod and is in sliding fit with the translation rod, the plurality of translation springs are fixedly installed between two adjacent translation blocks, the translation block corresponding to the feeding hole is fixedly installed with a connecting block, the connecting block is fixedly installed on the fixed shell, the translation cylinder is fixedly installed on the fixed shell, the moving block is fixedly installed on the output end of the translation cylinder, the moving block is sleeved on the translation rod and is in sliding fit with the translation block, and the moving block is located at the end of the translation rod away from the connecting block.

[0013] Preferably, the pushing unit comprises a pushing cylinder, a limiting plate and a pushing plate, the pushing cylinder is fixedly installed on the fixed shell, the limiting plate is fixedly installed on the output end of the pushing cylinder, the pushing plate is fixedly installed on the limiting plate, all the rotating racks are fixedly installed on the bottom of the pushing plate, and the transfer unit further comprises a limiting block, the limiting block is fixedly installed on the rotating rod.

[0014] Preferably, the transfer block is provided with a plurality of stable components, the plurality of stable components are arranged in a circumferential arrangement, the stable component comprises a stable block and a stable spring, a connecting groove is formed in the transfer block, the connecting groove is communicated with the transfer hole, the stable spring is fixedly installed in the connecting groove, the stable block is slidingly fitted in the connecting groove and is fixedly connected with the stable spring, the end of the stable block extends into the transfer hole, and the stable block is arranged in a trapezoidal shape.

[0015] Preferably, a connecting air cylinder is fixedly installed in the cold heading die, and an output end of the connecting air cylinder is fixedly installed with a push rod.

[0016] Preferably, the driving assembly comprises a driving shaft, a driving wheel, a driving connecting rod, a driving block and a driving slide rail, the driving shaft is rotatably connected in the cold heading shell, a power motor is connected with the driving shaft, the driving wheel is fixedly installed on the driving shaft, the driving wheel is eccentrically installed on the driving shaft, the driving connecting rod is rotatably connected on the driving wheel, the other end of the driving connecting rod is rotatably connected on the driving block, the driving slide rail is fixedly installed in the cold heading shell, the driving block is slidingly fitted in the driving slide rail, and a plurality of cold heading heads are fixedly installed on the driving block.

[0017] Preferably, the straightening assembly comprises a plurality of straightening units, each straightening unit comprises two straightening wheels and two connecting gears, the connecting gears are fixedly installed on the corresponding straightening wheels, the straightening wheels are rotatably connected in the cold heading shell, the two connecting gears are meshed with each other, and one of the connecting gears is connected with a straightening motor.

[0018] Preferably, a pay-off column is arranged on one side of the cold heading shell, a plurality of pay-off rods are fixedly installed on the pay-off column, a sliding sleeve is sleeved on the pay-off rod, the sliding sleeve can be locked on the pay-off rod through bolts, and a limiting rod is fixedly installed on the sliding sleeve.

[0019] A pin shaft machining method using the cold heading machine, comprising the following steps:

[0020] The straightening assembly straightens the metal wire and cuts it into a specified length of blank;

[0021] The metal wire is cut into a specified length of blank by the cutting knife in the feeding hole, and the blank enters the transfer hole of the corresponding transfer block under the pushing of the subsequent metal wire;

[0022] The transfer block rotates, and the transfer holes on the transfer block rotate to a straight line;

[0023] The plurality of transfer blocks translate, and the two adjacent transfer holes are connected end to end;

[0024] The embryo material in the transfer hole is pushed to move, and the embryo material pushes the next embryo material to move, so that the embryo material in the rotating hole is transferred to the next transfer hole;

[0025] The transfer block rotates, and the transfer hole is directed to the mold cavity;

[0026] The driving assembly drives the cold heading head to move, the cold heading head pushes the embryo material in the transfer block into the mold cavity, and the embryo material is formed in the mold cavity;

[0027] The formed embryo material is pushed out by the ejector rod, reenters the corresponding transfer block, and is transferred to the next mold cavity for forming;

[0028] Until the last transfer block is discharged, the pin shaft processing is completed.

[0029] In summary, the technical effects and advantages of the present application are:

[0030] 1. In the present application, the structure is compact, which ensures the sequential movement of the embryo material between the mold cavities, so that the embryo material is sequentially extruded and formed, the distance between multiple stations is reduced during the transfer of the embryo material, the embryo material is more stable during the transfer, the structure is more reliable, and the embryo material is limited when entering the mold cavity, preventing deviation, improving processing precision and production efficiency.

[0031] 2. In the present application, when the embryo material enters the transfer hole, the embryo material is extruded by the stable trapezoidal block, and the stable spring is compressed; the counterforce of the stable spring clamps the embryo material with the stable block, automatically clamps the embryo material, prevents the embryo material from falling off or deviating during the transfer process, and the trapezoidal design facilitates the embryo material to enter and exit, reducing friction damage.

[0032] 3. In the present application, a complete channel is formed, the embryo material at one end of the channel is pushed, multiple embryo materials can be moved synchronously, the embryo material enters the next transfer block, the abutting transfer blocks and the transfer holes connected at the head and tail make the embryo material transfer more continuously, there is no gap between the transfer blocks, the precision is improved, and the embryo material is prevented from being misaligned and falling off. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0034] Figure 1 It is a schematic diagram of the three-dimensional structure of the present application;

[0035] Figure 2 It is a schematic diagram of the structure of the driving assembly, the straightening assembly and the transfer assembly in the present application;

[0036] Figure 3This is a schematic diagram of the structure of the drive shaft, drive wheel, drive connecting rod, and drive block in this invention;

[0037] Figure 4 For the present invention Figure 3 Enlarged view of section A;

[0038] Figure 5 This is a schematic diagram of the structure of the drive linkage and drive block in this invention;

[0039] Figure 6 For the present invention Figure 5 Enlarged view of section C;

[0040] Figure 7 This is a schematic diagram of the structure of the rotating rod, rotating wheel, and transfer block in this invention;

[0041] Figure 8 This is a schematic diagram of the rotating gear and rotating rack in this invention;

[0042] Figure 9 This is a schematic diagram of the translation spring and translation rod in this invention;

[0043] Figure 10 This is a schematic diagram of the transfer block of the translation spring in this invention;

[0044] Figure 11 This is a schematic diagram of the rotating gear, rotating rack, and transfer block in this invention;

[0045] Figure 12 This invention Figure 11 Enlarged view of section D;

[0046] Figure 13 This is a schematic diagram of the structure of the unwinding column and unwinding rod in this invention.

[0047] In the diagram: 1. Cold heading shell; 2. Drive assembly; 21. Drive shaft; 22. Drive wheel; 23. Drive linkage; 24. Drive block; 25. Drive slide rail; 3. Straightening assembly; 31. Straightening wheel; 32. Connecting gear; 4. Transfer assembly; 41. Transfer unit; 411. Transfer block; 412. Rotating rod; 413. Translation block; 414. Rotating gear; 415. Rotating rack; 416. Limiting block; 42. Pushing unit; 421 422. Push cylinder; 423. Limiting plate; 43. Pushing plate; 44. Translation unit; 431. Translation rod; 432. Translation spring; 433. Translation cylinder; 434. Moving block; 44. Fixed housing; 5. Cold heading head; 6. Cold heading mold; 7. Stabilizing component; 71. Stabilizing block; 72. Stabilizing spring; 8. Push rod; 9. Connecting cylinder; 10. Push rod; 11. Unwinding column; 12. Unwinding rod; 13. Sliding sleeve; 14. Limiting rod. Detailed Implementation

[0048] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0049] Embodiment 1: Reference Figures 1-13 The cold header shown in the figure comprises a cold header shell, a driving assembly, a straightening assembly, a transfer assembly, a plurality of cold header dies and cold header dies are arranged in the cold header shell, and a plurality of cold header dies are arranged in the cold header dies. A die cavity is formed on the cold header die corresponding to the cold header die;

[0050] The cold header die is provided with a feeding hole, the transfer assembly comprises a plurality of transfer units, the transfer unit comprises a transfer block, the transfer block is provided with a transfer hole, and all the transfer blocks in the transfer assembly can rotate synchronously. When all the transfer blocks are rotated to make the transfer holes straight, the transfer blocks can be moved to make all the transfer holes connected end to end, and the embryo material in the transfer hole is transferred to the next transfer hole. When all the transfer blocks are rotated to make the transfer holes parallel to each other, the corresponding transfer hole corresponds to the die cavity and the feeding hole;

[0051] The straightening assembly can straighten the metal wire and pass it into the feeding hole;

[0052] The cold header die is provided with a plurality of ejector rods corresponding to the die cavity, and the ejector rod can push the embryo material in the die cavity into the corresponding transfer hole.

[0053] The straightening assembly straightens the metal wire and cuts it into embryo material of a specified length. The metal wire is cut into embryo material of a specified length by a cutting knife in the feeding hole. The embryo material enters the transfer hole of the corresponding transfer block under the pushing of the subsequent metal wire. The transfer block rotates, and the transfer hole on the transfer block rotates to a straight line. A plurality of transfer blocks translate, and the adjacent two transfer holes are connected end to end. The embryo material in the transfer hole is moved, and the embryo material pushes the next embryo material to move, so that the embryo material in the rotating hole is transferred to the next transfer hole. The transfer block rotates, and the transfer hole faces the die cavity. The driving assembly drives the cold header to move, and the cold header pushes the embryo material in the transfer block into the die cavity and forms in the die cavity. The formed embryo material is ejected by the ejector rod and reenters the corresponding transfer block to be formed in the next die cavity until the embryo material is discharged from the last transfer block.

[0054] The structure is compact, which ensures the sequential movement of the embryo material between the die cavities, so that the embryo material is extruded and formed in sequence. The transferred embryo material is more stable, the structure is more reliable, and the embryo material is limited when entering the die cavity, preventing deviation, improving processing precision and production efficiency.

[0055] Embodiment 2, refer to Figures 1-13 Different from the above embodiment, the transfer unit further comprises a rotating rod, a translation block, a rotating gear and a rotating rack, the rotating rod is fixedly installed on the transfer block, the rotating rod is rotatably connected to the translation block, the rotating gear is fixedly installed on the rotating rod, and the rotating rack is engaged with the rotating gear when all the transfer holes are parallel to each other.

[0056] When the transfer block needs to be rotated, the rotating rack moves, the rotating rack drives the rotating gear to rotate, the rotating gear drives the rotating rod to rotate, and the rotating rod drives the transfer block to rotate.

[0057] The transfer assembly further comprises a pushing unit, a translation unit and a fixed housing, the fixed housing is fixedly installed on the cold heading housing, the translation unit comprises a translation rod, a plurality of translation springs, a translation cylinder and a moving block, the translation rod is fixedly installed in the fixed housing, the translation rod is arranged in a rectangular shape, the moving block is sleeved on the translation rod and is in sliding fit with the translation rod, a plurality of translation springs are fixedly installed between adjacent two translation blocks, a connecting block is fixedly installed on the translation block corresponding to the feeding hole, the connecting block is fixedly installed on the fixed housing, the translation cylinder is fixedly installed on the fixed housing, and the moving block is fixedly installed on the output end of the translation cylinder. The moving block is sleeved on the translation rod and is in sliding fit with the translation block, and the moving block is located at one end of the translation rod away from the connecting block.

[0058] The translation cylinder drives the moving block to move along the translation rod and push the translation block to slide; the translation spring provides a buffering and resetting force between adjacent translation blocks, the translation block drives the transfer block to move, so that adjacent transfer blocks are connected end to end to form a complete channel, the embryo material at one end of the channel is pushed, a plurality of embryo materials can be moved synchronously, the embryo material enters the next transfer block, the abutting transfer blocks and the transfer holes connected end to end make the embryo material transfer more coherent, there is no gap between the transfer blocks, the precision is improved, and the embryo material is prevented from being misaligned and falling off.

[0059] The rectangular design of the translation rod prevents the translation block from rotating and ensures the stability of the movement; the translation spring realizes the synchronous movement of the translation blocks, simplifies the driving structure, reduces the energy consumption, and ensures that the transfer block after resetting is located at the corresponding mold cavity position.

[0060] Accommodation grooves are formed on both sides of the translation block, and the end portions of the translation springs are fixedly installed in the accommodation grooves. The accommodation grooves ensure that the translation spring can be located in the accommodation groove when the adjacent translation blocks abut, thereby preventing excessive compression.

[0061] Embodiment 3, refer to Figures 1-13Different from the above-mentioned embodiments, the pushing unit comprises a pushing cylinder, a limiting plate and a pushing plate, the pushing cylinder is fixedly installed on the fixed shell, the limiting plate is fixedly installed on the output end of the pushing cylinder, the pushing plate is fixedly installed on the limiting plate, all the rotating racks are fixedly installed on the bottom of the pushing plate, and the transfer unit further comprises a limiting block, the limiting block is fixedly installed on the rotating rod.

[0062] The pushing cylinder drives the limiting plate and the pushing plate to move, the pushing plate drives the rotating rack to move, the rotating gear and the rotating rod are driven to rotate, the limiting block cooperates with the limiting plate, at this time, the rotating rack is disengaged from the rotating gear, so that the transfer block and the rotating rod are not blocked by the rotating rack during the translation process, meanwhile, the limiting plate abuts against the limiting block to prevent the rotating rod and the transfer block from rotating during the translation process, and the stability is improved.

[0063] Embodiment 4, refer to Figures 1-13 Different from the above-mentioned embodiments, the transfer block is provided with a plurality of stable components, the plurality of stable components are arranged in a circle, the stable component comprises a stable block and a stable spring, a connecting groove is formed in the transfer block and communicates with the transfer hole, the stable spring is fixedly installed in the connecting groove, the stable block is slidingly fitted in the connecting groove and fixedly connected with the stable spring, the end portion of the stable block extends into the transfer hole, and the stable block is arranged in a trapezoidal shape.

[0064] When the blank enters the transfer hole, the trapezoidal stable block is extruded and the stable spring is compressed; the stable block is clamped to the blank by the reaction force of the stable spring, the blank is automatically clamped, and the blank is prevented from falling off or deviating during the transfer process; the trapezoidal design facilitates the blank to enter and exit, and reduces the friction damage.

[0065] A cutting cylinder is installed in the cold heading die, a cutting knife is fixedly installed on the output end of the cutting cylinder, the cutting knife is located on one side of the feeding hole, and the cutting cylinder and the cutting knife are prior art, which will not be described in detail here.

[0066] The cutting cylinder drives the cutting knife to move, and cuts the metal wire in the feeding hole into a blank of a specified length.

[0067] A connecting cylinder is fixedly installed in the cold heading die, and a push rod is fixedly installed on the output end of the connecting cylinder.

[0068] The connecting cylinder drives the push rod to move, and pushes the blank in the transfer hole to the next transfer hole.

[0069] Embodiment 5, refer to Figures 1-13Different from the above-mentioned embodiments, the driving assembly comprises a driving shaft, a driving wheel, a driving connecting rod, a driving block and a driving slide rail, the driving shaft is rotationally connected in the cold heading shell, the driving shaft is connected with a power motor, the driving wheel is fixedly installed on the driving shaft, the driving wheel is eccentrically installed on the driving shaft, the driving connecting rod is rotationally connected on the driving wheel, the other end of the driving connecting rod is rotationally connected on the driving block, the driving slide rail is fixedly installed in the cold heading shell, the driving block is slidingly fitted in the driving slide rail, and a plurality of cold heading heads are fixedly installed on the driving block.

[0070] The driving shaft drives the eccentrically installed driving wheel to rotate, the driving wheel drives the driving block to slide along the driving slide rail through the driving connecting rod, and the driving block drives the cold heading head to move to perform cold heading forming.

[0071] The driving wheel is fixedly installed on the driving shaft, and the power motor is prior art, not shown in the figure.

[0072] Embodiment 6, refer to Figures 1-13 Different from the above-mentioned embodiments, the straightening assembly comprises a plurality of straightening units, each straightening unit comprises two straightening wheels and two connecting gears, the connecting gears are fixedly installed on the corresponding straightening wheels, the straightening wheels are rotationally connected in the cold heading shell, and the two connecting gears are meshed with each other, and one of the connecting gears is connected with a straightening motor.

[0073] The straightening motor drives one of the connecting gears to rotate, drives the two straightening wheels to reversely rotate through the meshed other connecting gear, straightens the metal wire, reversely rotates the two wheels to effectively straighten the metal wire, and improves the precision of the blank.

[0074] One side of the cold heading shell is provided with a unwinding column, a base is rotationally connected to the bottom of the unwinding column, a plurality of unwinding rods are fixedly installed on the unwinding column, a sliding sleeve is sleeved on the unwinding rod, the sliding sleeve can be locked on the unwinding rod through bolts, and a limiting rod is fixedly installed on the sliding sleeve.

[0075] The metal wire is sleeved on the unwinding rod, and the sliding sleeve is locked and positioned through the bolts; the limiting rod prevents the metal wire from deviating when unwinding, the adjustable sliding sleeve can adapt to metal wire coils of different specifications, and the universality of the equipment is improved.

[0076] The straightening motor is prior art, not shown in the figure.

[0077] A pin shaft machining method uses the above-mentioned cold header, comprising the following steps:

[0078] The straightening assembly straightens the metal wire and cuts it into a blank of a specified length;

[0079] The metal wire is cut by the cutting knife in the feeding hole to a specified length of the embryo, and the embryo enters the transfer hole of the corresponding transfer block under the pushing of the subsequent metal wire;

[0080] The transfer block rotates, and the transfer holes on the transfer block rotate to a straight line;

[0081] The transfer block translates, and the adjacent two transfer holes are connected head to tail;

[0082] The embryo in the transfer hole is pushed to move, and the embryo pushes the next embryo to move, so that the embryo in the rotating hole is transferred to the next transfer hole;

[0083] The transfer block rotates, and the transfer hole faces the mold cavity;

[0084] The driving assembly drives the cold header to move, the cold header pushes the embryo in the transfer block into the mold cavity, and the embryo is formed in the mold cavity;

[0085] The formed embryo is pushed out by the ejector rod and reenters the corresponding transfer block to be transferred to the next mold cavity for forming;

[0086] Until the last transfer block is discharged, the pin shaft processing is completed.

[0087] The working principle of the present application is:

[0088] The metal wire is passed between the two straightening wheels, a connecting gear is driven to rotate, the connecting gear drives another connecting gear to rotate reversely, the connecting gear drives the straightening wheels to rotate reversely, the metal wire is straightened and passed into the feeding hole, the metal wire is cut to a specified length of blank by the cutting knife in the feeding hole, the blank is pushed into the transfer hole of the transfer block under the pushing of the subsequent metal wire, then the push cylinder drives the limiting plate to move, the limiting plate drives the push plate to move, the push plate drives the rotating rack to move, the rotating rack drives the rotating gear to rotate, the rotating gear drives the rotating rod to rotate, the rotating rod drives the transfer block to rotate, the transfer holes on all the transfer blocks are rotated to be in a straight line, then the rotating rack is disengaged from the rotating gear, the limiting plate abuts against the limiting block to prevent the rotating rod and the transfer block from rotating in the process of translation, the translation cylinder drives the moving block to move, the moving block extrudes the translation block, the translation springs between the translation blocks are compressed, until the adjacent transfer blocks abut against each other, the moving holes on the transfer blocks are connected in a loop, the connecting cylinder drives the push rod to move, the push rod enters the corresponding transfer hole, the push rod pushes the blank in the transfer hole to move, a plurality of blanks push the next blank to move, the blank in the transfer block moves into the next transfer block, then the reset, the transfer block rotates to reset the transfer hole to face the mold cavity, the drive shaft drives the drive wheel to rotate, because the drive wheel is eccentrically installed on the drive shaft, the drive wheel drives the drive link to move, the drive link drives the drive block to move, the drive block drives the cold heading head to move, the cold heading head pushes the blank in the transfer block into the mold cavity, and the blank is formed in the mold cavity, the formed blank is pushed out by the ejector rod, and reenters the corresponding transfer block, and is sequentially transferred to the next mold cavity according to the method, until the blank is discharged from the last transfer block.

[0089] When the blank enters the transfer hole of the transfer block, the stabilizing spring pushes the stabilizing block, and a plurality of stabilizing blocks clamp the blank to prevent the blank from accidentally separating from the transfer hole.

[0090] Finally, it should be noted that: the above only describes the preferred embodiments of the present application and is not intended to limit the present application, although the foregoing embodiments of the present application have been described in detail, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A cold header comprising a cold header housing, characterized by: The cold heading shell is internally provided with a driving assembly, a straightening assembly, a transfer assembly, a plurality of cold heading heads and cold heading dies, and a die cavity is formed in each cold heading die corresponding to the plurality of cold heading heads. The cold heading die is provided with a feeding hole, the transfer assembly comprises a plurality of transfer units, each transfer unit comprises a transfer block, a transfer hole is formed in the transfer block, all the transfer blocks in the transfer assembly can rotate synchronously, when the transfer holes of all the transfer blocks are in a straight line after rotation, the transfer blocks can move to connect the transfer holes end to end, and the billets in the transfer holes are transferred to the next transfer hole, when the transfer holes of all the transfer blocks are parallel to each other, the corresponding transfer holes correspond to the die cavities and the feeding hole. The straightening assembly can straighten the metal wire and pass it into the feeding hole. A plurality of ejector rods are arranged in the cold heading die corresponding to the die cavities, and the ejector rods can push the billets in the die cavities into the corresponding transfer holes.

2. A cold header as claimed in claim 1, characterized in that: The transfer unit further comprises a rotating rod, a translation block, a rotating gear and a rotating rack, the rotating rod is fixedly installed on the transfer block, the rotating rod is rotatably connected to the translation block, the rotating gear is fixedly installed on the rotating rod, and the rotating rack is engaged with the rotating gear when all the transfer holes are parallel to each other.

3. A cold header as claimed in claim 2, characterized in that: The transfer assembly further comprises a pushing unit, a translation unit and a fixed shell, the fixed shell is fixedly installed on the cold heading shell, the translation unit comprises a translation rod, a plurality of translation springs, a translation cylinder and a moving block, the translation rod is fixedly installed in the fixed shell, the translation rod is in a rectangular shape, the moving block is sleeved on the translation rod and is in sliding fit with the translation rod, the plurality of translation springs are fixedly installed between two adjacent translation blocks, the translation block corresponding to the feeding hole is fixedly installed with a connecting block, the connecting block is fixedly installed on the fixed shell, the translation cylinder is fixedly installed on the fixed shell, the moving block is fixedly installed on the output end of the translation cylinder, the moving block is sleeved on the translation rod and is in sliding fit with the translation block, and the moving block is located at the end of the translation rod away from the connecting block.

4. A cold header as claimed in claim 3, characterized in that: The pushing unit comprises a pushing cylinder, a limiting plate and a pushing plate, the pushing cylinder is fixedly installed on the fixed shell, the limiting plate is fixedly installed on the output end of the pushing cylinder, the pushing plate is fixedly installed on the limiting plate, all the rotating racks are fixedly installed on the bottom of the pushing plate, and the transfer unit further comprises a limiting block, the limiting block is fixedly installed on the rotating rod.

5. A cold header as defined in claim 1, wherein: The transfer block is provided with a plurality of stabilizing assemblies, the plurality of stabilizing assemblies are arranged in a circumferential direction, the stabilizing assembly comprises a stabilizing block and a stabilizing spring, the transfer block is provided with a connecting groove in communication with the transfer hole, the stabilizing spring is fixedly installed in the connecting groove, the stabilizing block is in sliding fit in the connecting groove and is fixedly connected with the stabilizing spring, the end of the stabilizing block extends into the transfer hole, and the stabilizing block is in a trapezoidal shape.

6. A cold header as defined in claim 1, wherein: A connecting cylinder is fixedly installed in the cold heading die, and a push rod is fixedly installed on the output end of the connecting cylinder.

7. A cold header as defined in claim 1, wherein: The driving assembly comprises a driving shaft, a driving wheel, a driving connecting rod, a driving block and a driving slide rail, the driving shaft is rotationally connected in the cold heading shell, the driving shaft is connected with a power motor, the driving wheel is fixedly installed on the driving shaft, the driving wheel is eccentrically installed on the driving shaft, the driving connecting rod is rotationally connected on the driving wheel, the other end of the driving connecting rod is rotationally connected on the driving block, the driving slide rail is fixedly installed in the cold heading shell, the driving block is slidingly fitted in the driving slide rail, and a plurality of cold heading heads are fixedly installed on the driving block.

8. A cold header as defined in claim 1, wherein: The straightening assembly comprises a plurality of straightening units, each straightening unit comprises two straightening wheels and two connecting gears, the connecting gears are fixedly installed on the corresponding straightening wheels, the straightening wheels are rotationally connected in the cold heading shell, and the two connecting gears are meshed with each other, and one of the connecting gears is connected with a straightening motor.

9. A cold header as defined in claim 1 wherein: One side of the cold heading shell is provided with a unwinding column, a plurality of unwinding rods are fixedly installed on the unwinding column, a sliding sleeve is sleeved on the unwinding rod, the sliding sleeve can be locked on the unwinding rod through bolts, and a limiting rod is fixedly installed on the sliding sleeve.

10. A method of manufacturing a pin, using a cold header according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: The straightening assembly straightens the metal wire and cuts it into a specified length of blank; The metal wire is cut into a specified length of blank by the cutting knife in the feeding hole, and the blank enters the transfer hole of the corresponding transfer block under the pushing of the subsequent metal wire; The transfer block rotates, and the transfer hole on the transfer block rotates to a straight line; A plurality of transfer blocks translate, and the two adjacent transfer holes are connected end to end; The blank in the transfer hole is pushed to move, and the blank pushes the next blank to move, so that the blank in the rotating hole is transferred to the next transfer hole; The transfer block rotates, and the transfer hole faces the mold cavity; The driving assembly drives the cold heading head to move, the cold heading head pushes the blank in the transfer block into the mold cavity, and the blank is formed in the mold cavity; The formed blank is pushed out by the ejector rod and reenters the corresponding transfer block to be transferred to the next mold cavity for forming; Until the last blank is discharged from the last transfer block, the pin shaft processing is completed.

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