Anti-deviation cold heading device for bolt machining

Abstract

The application discloses a kind of anti-deviation cold heading equipment for bolt processing, belong to cold header technical field, including shell, operation door plate hinged connection at the front opening position of shell, for taking cold heading forming piece, multiple groups of cold heading die unit each group of cold heading die unit includes the movable die and fixed die of relative layout and mutual cooperation, die movement mechanism is set in the shell inside, for driving multiple movable die synchronous movement to corresponding fixed die to realize cold heading, wire input cylinder quantity is several and with multiple groups of cold heading die unit one-to-one layout, the wire input cylinder is fixedly connected in the side surface of shell;It is composed of anti-deviation unit by internal cold heading anti-deviation component and external wire entry anti-deviation component, from the radial centering of wire entry end, to the outer wall clamping in cold heading die cavity, whole process constrains wire position, effectively offsets the displacement problem caused by upsetting impact force, guarantee the coaxiality of bolt stem and head, substantially reduce the forming defective rate.

Description

Technical Field

[0001] This invention belongs to the field of cold heading machine technology, specifically relating to an anti-deviation cold heading device for bolt processing. Background Technology

[0002] Cold heading machines are specialized forging equipment that extrudes metal wires and bars under high pressure at room temperature. They produce hardware parts such as bolts, nuts, and rivets by plastic deformation of metal. The entire process does not require heating, resulting in high production efficiency and good material utilization. They are widely used in the fastener processing industry.

[0003] Existing cold heading machines, when cold heading is performed using movable and fixed heading dies after wire input, lack effective anti-deviation positioning structures in the wire input and cold heading forming stages. Radial sway is prone to occur during wire feeding, and axial displacement is easily caused by the impact force of the heading pressure after entering the heading die cavity. This results in eccentricity of the bolt head and excessive coaxiality of the shank, directly affecting the dimensional accuracy and assembly performance of the finished bolt. The cutting mechanism after cold heading is mostly a single-blade shearing structure, which easily causes large burrs and tilted cross-sections due to uneven shearing force. Moreover, the cutting position is inconvenient to adjust flexibly, making it difficult to adapt to the processing of bolts of different lengths and specifications. At the same time, the lack of a stable receiving structure for the extruded parts leads to insufficient smoothness of the extrusion during mass production. Overall processing efficiency and consistency of finished products are difficult to guarantee, resulting in significant limitations in use.

[0004] Therefore, we propose an anti-deviation cold heading device for bolt processing. Summary of the Invention

[0005] The purpose of this invention is to provide a cold heading device for bolt processing that prevents misalignment, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a cold heading device for bolt processing to prevent offset, comprising a housing;

[0007] The working door panel is hinged to the front opening of the housing and is used to retrieve cold-formed parts.

[0008] Multiple sets of cold heading die units, each set of cold heading die units includes movable heading dies and fixed heading dies that are arranged relatively to each other and used in cooperation;

[0009] The upsetting die motion mechanism is located inside the housing and is used to drive multiple movable upsetting dies to move synchronously toward the corresponding fixed upsetting die to achieve cold upsetting;

[0010] There are several wire input cylinders, which are arranged one-to-one with multiple sets of cold heading die units. The wire input cylinders are fixedly connected to one side of the housing.

[0011] The anti-deviation unit includes an internal cold heading anti-deviation component and an external wire inlet anti-deviation component. The internal cold heading anti-deviation component is mounted on a fixed heading die and is used to prevent the wire inside the fixed heading die from deviating. The external wire inlet anti-deviation component is mounted on a wire inlet cylinder and is used to prevent the wire inside the wire inlet cylinder from deviating.

[0012] The cutting assembly, located between the fixed upsetting die and the wire input cylinder, is used to cut the cold-forged parts off the wire.

[0013] The receiving box, located inside the housing, is used to receive the cold-forged parts cut off by the cutting assembly and pushed down by the subsequent wire.

[0014] The above scheme employs a dual-level anti-deviation structure consisting of an internal cold heading anti-deviation component and an external wire inlet anti-deviation component, which restricts wire deviation throughout the entire process from wire inlet to cold heading. At the same time, multiple cold heading die units are configured to achieve multi-station synchronous heading. The adjustable synchronous cutting component balances batch processing efficiency and forming accuracy, and is suitable for cold heading production of bolts of various lengths and specifications.

[0015] In the above scheme, it should be noted that motor one, motor two, motor three, cylinder one and cylinder two are all electrically connected to an external power source, and cylinder one and cylinder two achieve extension and retraction by being supplied with air pressure from an external air source.

[0016] In a preferred embodiment, the upsetting die motion mechanism includes a motor fixedly connected to the side of the housing, a crank connecting rod rotatably connected inside the housing, a plurality of hinged arms hinged to the crank connecting rod, and a mounting plate hinged to the other end of the hinged arms. The output shaft of the motor is fixedly connected to one end of the crank connecting rod. The movable upsetting die is fixedly connected to the side of the mounting plate. A plurality of guide sleeves are fixedly connected to both ends of the mounting plate. A guide rod is slidably connected to the inner wall of the guide sleeve. A fixing block is fixedly connected to both ends of the guide rod. The fixing block is fixedly connected to the inner wall of the housing.

[0017] The above scheme uses a motor to drive the crank connecting rod to rotate, and in conjunction with the articulation of the articulated arm, it synchronously drives multiple moving upsetting dies to reciprocate at the same time, ensuring that the upsetting stroke of each station is completely consistent and avoiding stroke errors caused by multiple power drives. The guide rod and guide sleeve work together to provide precise linear guidance for the mounting plate, constrain the movement trajectory of the moving upsetting dies, prevent the upsetting dies from deflecting when they are closed, and effectively improve the synchronization and forming accuracy of multi-station processing.

[0018] In a preferred embodiment, the internal cold heading anti-deviation assembly includes a mounting bracket fixedly connected to a fixed heading die. A cylinder is fixedly connected to both the upper and lower surfaces of the mounting bracket. A linkage plate is fixedly connected to the piston rod end of the cylinder at the upper position and the piston rod end of the cylinder at the lower position. A plurality of sliding columns facing the fixed heading die are fixedly connected to the side of the linkage plate facing the fixed heading die. The sliding columns slide through and extend into the interior of the fixed heading die. An anti-deviation clamping plate is fixedly connected to the end of the sliding column inside the fixed heading die.

[0019] Using the above scheme, before the cold forging operation, the upper and lower cylinders synchronously drive the upper and lower linkage plates to move relative to each other. The sliding column drives the anti-deviation clamping plate to extend into the cavity of the fixed forging die, clamping and positioning the end of the wire from the top and bottom. During the cold forging process, the anti-deviation clamping plate continuously provides clamping force, directly offsetting the radial impact force of the instantaneous forging, preventing the wire from shifting or moving within the die cavity, ensuring the coaxiality of the bolt head forging from the forming end, and reducing eccentric defects.

[0020] In a preferred embodiment, the cutting assembly includes an adjustment mechanism and a material distribution frame disposed on the adjustment mechanism. The adjustment mechanism is used to horizontally adjust the material distribution frame. The material distribution frame contains two opposing material distribution blades arranged vertically. A cylinder is fixedly connected to the lower surface of the material distribution frame. The piston rod end of the cylinder is fixedly connected to the material distribution blade located below. A linkage mechanism is provided on the side of the material distribution frame. This linkage mechanism drives the two material distribution blades to move synchronously relative to each other when the cylinder extends or retracts. Several support rods are fixedly connected to the side of the material distribution frame. Support sleeves that slide on the outer wall of the support rods are fixedly connected to the side of each material distribution blade. Guide sleeves are fixedly connected to each of the four corners of the material distribution frame. Guide rods slide through the inner wall of each guide sleeve. Fixing blocks are fixedly connected to both ends of each guide rod, and the fixing blocks are fixedly connected to the inner wall of the housing.

[0021] The above scheme uses two cutting blades, one upper and one lower, which are connected by a linkage mechanism to open and close synchronously. This ensures symmetrical and balanced shearing force, resulting in smooth bolt cuts without obvious burrs. The support rod and support sleeve provide sliding support for the cutting blades, preventing them from deflecting or deforming under shearing force. The guide rod and guide sleeve work together to guide the overall translation of the cutting frame. The adjustment mechanism allows for flexible adjustment of the cutting position to accommodate the processing needs of bolts of different lengths.

[0022] In a preferred embodiment, the adjusting mechanism includes an adjusting shell fixedly connected to the inner wall of the housing. A second motor is fixedly connected to the side of the adjusting shell. A threaded rod is rotatably connected to the inner wall of the adjusting shell. The output shaft of the second motor is fixedly connected to one end of the threaded rod. A threaded sleeve is threadedly connected to the outer wall of the threaded rod. The lower surface of the threaded sleeve is fixedly connected to the upper surface of the material distribution frame. A plurality of limiting rods are fixedly connected to the inner wall of the adjusting shell. The threaded sleeve is slidably connected to the outer wall of the plurality of limiting rods.

[0023] The above scheme uses a threaded rod drive to drive the horizontal displacement of the material distribution frame. It has high transmission accuracy and can accurately control the distance between the cutting station and the fixed upsetting die, accurately match the blanking length of bolts of different specifications. The limit rod limits the threaded sleeve plate circumferentially to prevent it from rotating synchronously with the threaded rod, ensuring the linearity and positional stability of the translational movement. The adjustment process is smooth and without jamming.

[0024] In a preferred embodiment, the linkage mechanism includes a linkage shell fixedly connected to the side of the material distribution frame. A linkage gear is rotatably connected to the inner wall of the linkage shell. Linkage gears are meshed on both sides of the linkage gear. The two linkage gears are staggered. One end of the linkage gear passes through a channel opened on the side of the linkage shell and is fixedly connected to the material distribution knife at the corresponding position. Two I-shaped slide bars are fixedly connected to the inner wall of the linkage shell. An I-shaped groove is opened on the side of the linkage gear to slide and adapt to the I-shaped slide bar at the same position on the same side.

[0025] By adopting the above scheme, the meshing transmission of the linkage gear and linkage tooth plate enables the upper material cutting blade to move synchronously in the opposite direction when the lower material cutting blade is driven up and down by the cylinder 2. This achieves synchronous cutting of the two material cutting blades, simplifies the drive structure and ensures shearing synchronization. The I-shaped slide bar and I-shaped slide groove provide precise guidance for the linkage tooth plate, preventing misalignment and tooth dislodgement when the linkage gear and linkage tooth plate mesh, thus improving the operational stability and service life of the transmission structure.

[0026] In a preferred embodiment, the external wire inlet anti-deviation assembly includes a motor three fixedly connected to the side of the housing; a rotating drum is rotatably connected to the outer wall of the wire input drum; synchronous pulleys are fixedly connected to the outer wall of the rotating drum and the outer wall of the output shaft of the motor three; a synchronous belt drives between two adjacent synchronous pulleys; a disc is fixedly connected to the outer wall of the rotating drum; several inclined wheel tracks are opened on the disc; rollers are rolledly connected to the inner wall of the inclined wheel tracks; several anti-deviation sliding posts arranged in a circular array are slidably connected to the wire input drum; rollers are fixedly connected to the outer end of the anti-deviation sliding posts; and the inner end of the anti-deviation sliding posts slides into the inside of the wire input drum and is fixedly connected to an anti-deviation wheel.

[0027] Using the above scheme, multiple sets of anti-deviation sliding columns in a ring array are set on the wire input drum in conjunction with anti-deviation wheels. The motor drives the disc to rotate, and the inclined surface of the inclined wheel track pushes the roller, driving all the anti-deviation sliding columns to feed radially synchronously. It can adapt to wires of different diameters and achieve centering and clamping. The roller rolls along the inclined wheel track, with low transmission resistance and smooth adjustment. It can maintain the centering state continuously during the wire feeding process, eliminating wire sway error from the source of wire input, and providing a basic guarantee for the accuracy of subsequent cold heading. The synchronous belt and synchronous pulley can achieve synchronous rotation of multiple discs.

[0028] In a preferred embodiment, a limiting ring is fixedly connected to the outer wall of the anti-slip column, and a spring is fixedly connected between the limiting ring and the wire input cylinder, with the spring sleeved on the outside of the anti-slip column.

[0029] Using the above scheme, the spring, together with the limiting ring, provides a reset force for the anti-deviation sliding post. When the disc rotates in the opposite direction, the spring can push the anti-deviation sliding post to automatically reset outward, increasing the diameter of the wire inlet channel and facilitating the initial wire insertion. At the same time, the spring can provide elastic buffer margin to absorb small vibrations during the wire feeding process, avoid hard clamping and damage to the wire surface, and further improve the stability of the wire feeding process.

[0030] In a preferred embodiment, a limiting frame is fixedly connected to the inner wall of the housing at the position corresponding to the receiving box, and the receiving box is inserted inside the limiting frame.

[0031] The above solution employs a plug-in receiving box installation structure. The position of the receiving box is limited by a limiting frame, ensuring that the receiving box is accurately aligned with the falling cold-forged parts. The cold-forged parts can fall accurately into the receiving box. The plug-in design facilitates quick pulling and placing of the receiving box, making it convenient for the collection and transfer of finished products.

[0032] In a preferred embodiment, damping slots are provided on opposite inner walls of the limiting frame, and damping inserts that are inserted into the damping slots are fixedly connected to the side of the receiving box.

[0033] Using the above solution, the damping insert and the damping slot work together to form a damping positioning structure. After insertion, it can generate stable insertion and extraction resistance, which can offset the vibration during equipment operation, prevent the receiving box from shifting or even slipping, and ensure the continuous stability of the receiving position. At the same time, no additional locking structure is required, and the pull-out operation is simple, taking into account both positioning reliability and operation convenience.

[0034] Compared with the prior art, the beneficial effects of the present invention are:

[0035] This anti-deviation cold heading equipment for bolt processing uses an anti-deviation unit consisting of an internal cold heading anti-deviation component and an external wire inlet anti-deviation component. From radial centering at the wire inlet end to clamping on the outer wall inside the cold heading die cavity, it constrains the wire position throughout the entire process, effectively counteracting the movement problem caused by the upsetting impact force, ensuring the coaxiality of the bolt shank and head, and significantly reducing the forming defect rate.

[0036] This anti-deviation cold heading equipment for bolt processing uses multiple sets of cold heading die units in conjunction with the heading die motion mechanism. By utilizing the rotation of the crank connecting rod and the hinge action of the hinge arm, multiple movable heading dies are driven to move synchronously toward or away from the fixed heading die, realizing multi-station cold heading operations. Moreover, the heading stroke of each station is completely consistent, which not only realizes the batch production of multiple wires processed simultaneously, but also ensures the dimensional uniformity of finished products at different stations.

[0037] This anti-deviation cold heading equipment for bolt processing uses a cutting assembly with a linkage mechanism to work with two upper and lower cutting blades. This allows the two cutting blades to move synchronously relative to each other to separate the bolts, resulting in symmetrical and balanced shearing force. In addition, with the adjustment mechanism, the horizontal cutting position of the cutting blades can be adjusted according to the required bolt length and specifications, thus expanding its applicability. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of the present invention;

[0039] Figure 2 This is a schematic diagram of the structure of the working door panel of the present invention when it is opened;

[0040] Figure 3 This is a schematic diagram of the cross-section of the present invention;

[0041] Figure 4 For the present invention Figure 3 A structural diagram from another angle;

[0042] Figure 5 This is a schematic diagram of the upsetting die motion mechanism of the present invention;

[0043] Figure 6 This is a schematic diagram of the internal cold heading anti-deviation component of the present invention;

[0044] Figure 7 This is a schematic diagram of the structure of the fixed upsetting die cross-section of the present invention;

[0045] Figure 8 This is a schematic diagram of the material cutting assembly of the present invention;

[0046] Figure 9 This is a schematic diagram of the cross-section of the adjusting shell of the present invention;

[0047] Figure 10This is a cross-sectional view of the linkage shell and a structural schematic diagram of the material distribution frame of the present invention;

[0048] Figure 11 This is a schematic diagram of the cross-sectional structure of the linkage shell of the present invention;

[0049] Figure 12 This is a schematic diagram of the external inlet anti-deviation component of the present invention;

[0050] Figure 13 This is a schematic diagram of the wire input cylinder of the present invention;

[0051] Figure 14 This is a schematic diagram of the cross-section of the wire input cylinder of the present invention;

[0052] Figure 15 This is an exploded structural diagram of the receiving box and the limiting frame of the present invention.

[0053] In the diagram: 1. Housing; 2. Working door panel; 3. Movable upsetting die; 4. Upsetting die motion mechanism; 5. Fixed upsetting die; 6. Internal cold upsetting anti-deviation assembly; 7. Cutting assembly; 8. External inlet anti-deviation assembly; 9. Receiving box; 10. Motor 1; 11. Crank connecting rod; 12. Hinge arm; 13. Mounting plate; 14. Fixing block 1; 15. Guide rod 1; 16. Guide sleeve 1; 17. Mounting bracket; 18. Cylinder 1; 19. Linkage plate; 20. Sliding column; 21. Anti-deviation clamping plate; 22. Adjusting shell; 23. Material distribution frame; 24. Material distribution knife; 25. Cylinder 2 26. Motor II; 27. Threaded rod; 28. Threaded sleeve plate; 29. ​​Limiting rod; 30. Fixing block II; 31. Guide rod II; 32. Guide sleeve II; 33. Support rod; 34. Support sleeve; 35. Linkage housing; 36. Linkage gear; 37. Linkage tooth plate; 38. I-shaped slide bar; 39. Motor III; 40. Wire input cylinder; 41. Rotary drum; 42. Disc; 43. Synchronous pulley; 44. Synchronous belt; 45. Anti-deviation sliding column; 46. Roller; 47. Anti-deviation wheel; 48. Limiting ring; 49. Spring; 50. Limiting frame; 51. Damping insert. Detailed Implementation

[0054] Please see Figure 1-15 This invention provides a cold heading device for bolt processing that prevents deviation, including a housing 1. The housing 1 is a hollow box-type structure that provides a foundation for the installation, bearing and protection of the entire device. A working door 2 is hinged to the front opening of the housing 1. The working door 2 can be flipped open and closed around the side hinge axis. When closed, it can isolate the internal mechanisms of the device and reduce operating noise. When opened, it can be used to take out the cold heading parts and facilitate the inspection and maintenance of the internal mechanisms.

[0055] The housing 1 is equipped with multiple sets of cold heading die units. Each set of cold heading die units includes a movable heading die 3 and a fixed heading die 5 that are arranged opposite to each other and used in cooperation. The end face cavities of the movable heading die 3 and the fixed heading die 5 together form a bolt forming cavity. When the two are closed and squeezed, the end of the metal wire can undergo plastic deformation to form a bolt head structure.

[0056] The housing 1 also houses a die-moving mechanism 4, which drives multiple movable dies 3 to reciprocate linearly towards their corresponding fixed dies 5, enabling continuous cold heading operations. The die-moving mechanism 4 includes a motor 10 fixedly connected to the outer wall of the housing 1. A crank-connecting rod 11 is rotatably connected between the inner walls of the two sides of the housing 1. The output shaft of the motor 10 passes through the side wall of the housing 1 and is fixedly connected to one end of the crank-connecting rod 11. Several hinged arms 12 are hinged to the shaft of the crank-connecting rod 11, and the other ends of the hinged arms 12 are hinged to the side of the mounting plate 13. All movable dies 3 are fixedly connected to the mounting plate 13 facing the fixed die 5. On one side, several guide sleeves 16 are fixedly connected to both ends of the mounting plate 13. A horizontally arranged guide rod 15 is slidably connected to the inner wall of the guide sleeve 16. A fixing block 14 is fixedly connected to both ends of the guide rod 15. The fixing block 14 is fixedly connected to the inner wall of the housing 1. When the motor 10 drives the crank connecting rod 11 to rotate in a circle, the rotational motion is converted into the horizontal reciprocating sliding of the mounting plate 13 through the hinge arm 12, thereby driving multiple sets of movable upsetting dies 3 to move forward and backward synchronously, ensuring that the upsetting stroke of each station is completely consistent. The cooperation between the guide rod 15 and the guide sleeve 16 constrains the movement trajectory of the mounting plate 13, preventing the movable upsetting die 3 from deflecting when closing the mold.

[0057] Several wire input cylinders 40 are fixedly connected to one side of the housing 1 facing the wire feeding direction. The number of wire input cylinders 40 corresponds to the number of cold heading die units. The metal wire is fed into the housing 1 through the guide of the wire input cylinders 40 and precisely extends into the mold cavity of the corresponding fixed heading die 5.

[0058] This equipment is equipped with an anti-deviation unit, which includes an internal cold heading anti-deviation component 6 and an external wire feeding anti-deviation component 8. It performs anti-deviation positioning on the wire during both the wire feeding and in-mold forming stages, achieving full-process anti-deviation control. The external wire feeding anti-deviation component 8 is mounted on the wire input cylinder 40 and is used to radially center the wire fed inside the cylinder 40, eliminating sway errors during the wire feeding process. The external wire feeding anti-deviation component 8 includes a motor 39 fixedly connected to the side of the housing 1. A rotating drum 41 is rotatably connected to the outer wall of the wire input cylinder 40 via bearings. Synchronous pulleys 43 are fixedly connected to the outer wall of the rotating drum 41 and the outer wall of the output shaft of the motor 39. A synchronous belt 44 drives between adjacent synchronous pulleys 43. A disc 42 is fixedly connected to the outer wall of the rotating drum 41 at the end away from the housing 1. The disc 42 has several inclined wheel tracks extending circumferentially, and rollers are rollingly connected to the inner wall of each inclined wheel track. 46. ​​Several anti-deviation pins 45 arranged in a circular array are slidably connected to the wall of the wire input cylinder 40. Rollers 46 are fixedly connected to the outer ends of the anti-deviation pins 45. The inner ends of the anti-deviation pins 45 slide into the inside of the wire input cylinder 40 and are fixedly connected to anti-deviation wheels 47. Limiting rings 48 are fixedly connected to the outer walls of the anti-deviation pins 45. Springs 49 are fixedly connected between the limiting rings 48 and the outer walls of the wire input cylinder 40. Springs 49 are sleeved on the anti-deviation pins. Externally, when the motor 39 drives the rotating drum 41 and the disc 42 to rotate via the synchronous belt 44, the inclined surface extrusion roller 46 of the inclined wheel track moves radially, driving all the anti-deviation sliding pillars 45 to feed synchronously toward the center of the wire input drum 40, so that the ring-shaped anti-deviation wheels 47 jointly abut against the outer wall of the wire to achieve automatic centering. The spring 49 provides the reset elastic force for the anti-deviation sliding pillars 45, and at the same time absorbs the small vibrations during the wire feeding process to avoid hard clamping and damage to the wire surface.

[0059] An internal cold heading anti-deviation assembly 6 is installed on the fixed heading die 5 to clamp and position the wire end inside the die cavity of the fixed heading die 5, thus counteracting the radial impact force during the heading process. The internal cold heading anti-deviation assembly 6 includes a mounting bracket 17 fixedly connected to the outer wall of the fixed heading die 5. Cylinders 18 are fixedly connected to both the upper and lower surfaces of the mounting bracket 17. Linkage plates 19 are fixedly connected to the piston rod ends of cylinders 18 at both the upper and lower positions. The two linkage plates 19 are arranged parallel to each other. Several couplings are fixedly connected to the side of each linkage plate 19 facing the fixed heading die 5. The sliding column 20 is directly opposite the fixed upsetting die 5. The sliding column 20 slides through the side wall of the fixed upsetting die 5 and extends into the cavity of the fixed upsetting die 5. One end of the sliding column 20 located inside the fixed upsetting die 5 is fixedly connected to the anti-deviation clamping plate 21. When the piston rods of the upper and lower cylinders 18 extend synchronously, the two anti-deviation clamping plates 21 are driven to move synchronously toward the center of the cavity through the linkage plate 19 and the sliding column 20, clamping the end of the wire from the upper and lower directions. During the cold upsetting process, the clamping force is continuously provided to prevent the wire from shifting or moving due to the upsetting pressure impact force, ensuring the coaxiality of the bolt forming. The upper and lower clamping can meet the process anti-deviation requirements.

[0060] A cutting assembly 7 is provided between the fixed upsetting die 5 and the wire input cylinder 40 to smoothly cut the cold-forged bolt workpiece from the wire body. The cutting assembly 7 includes an adjusting mechanism and a distribution frame 23 located below the adjusting mechanism. The adjusting mechanism is fixed to the top of the inner wall of the housing 1 and is used to adjust the horizontal position of the distribution frame 23 to accommodate bolts of different lengths. The interior of the distribution frame 23 has two opposing distribution blades 24, one above the other. A cylinder 25 is fixedly connected to the lower surface of the distribution frame 23. The piston rod end of the cylinder 25 extends upward through the bottom wall of the distribution frame 23 and is fixedly connected to the distribution blades 24 located below. A linkage mechanism is provided on the side of the distribution frame 23. When the cylinder 25 extends or retracts, it drives the two distributing blades 24 to move synchronously relative to each other, achieving opposing shearing. Several vertically arranged support rods 33 are fixedly connected to the inner wall of the distributing frame 23. Each distributing blade 24 is fixedly connected to the side of a support sleeve 34 that slides on the outer wall of the support rod 33, providing sliding support for the opening and closing movement of the distributing blade 24 and preventing the blade from deflecting when shearing. Guide sleeves 22 are fixedly connected to the four corners of the distributing frame 23. Horizontally arranged guide rods 21 slide through the inner wall of the guide sleeves 22. Fixed blocks 20 are fixedly connected to both ends of the guide rods 21. The fixed blocks 20 are fixedly connected to the inner wall of the housing 1, providing stable guidance for the overall translation of the distributing frame 23.

[0061] The adjustment mechanism includes an adjustment shell 22 fixedly connected to the top of the inner wall of the housing 1. A motor 26 is fixedly connected to the side of the adjustment shell 22. A threaded rod 27 is rotatably connected between the inner walls of the two sides of the adjustment shell 22. The output shaft of the motor 26 passes through the side wall of the adjustment shell 22 and is fixedly connected to one end of the threaded rod 27. A threaded sleeve 28 is threadedly connected to the outer wall of the threaded rod 27. The lower surface of the threaded sleeve 28 is fixedly connected to the upper surface of the material distribution frame 23. Several limiting rods 29 arranged parallel to the threaded rod 27 are also fixedly connected to the inner wall of the adjustment shell 22. The threaded sleeve 28 is slidably connected to the outer wall of the several limiting rods 29. When the motor 26 drives the threaded rod 27 to rotate, the threaded sleeve 28 moves horizontally along the limiting rods 29 under the action of threaded transmission, thereby driving the entire material distribution frame 23 to translate along the guide rod 31, accurately adjusting the distance between the cutting station and the fixed upsetting die 5 to match the material cutting requirements of bolts of different lengths.

[0062] The linkage mechanism includes a linkage housing 35 fixedly connected to the side of the material distribution frame 23. A linkage gear 36 is rotatably connected to the inner wall of the linkage housing 35. Linkage gear plates 37 are meshed on both the upper and lower sides of the linkage gear 36. The two linkage gear plates 37 are staggered to avoid interference during movement. One end of the linkage gear plate 37 passes through a channel opened on the side of the linkage housing 35 and is fixedly connected to the corresponding material distribution knife 24. Two I-shaped slide bars 38 are fixedly connected to the inner wall of the linkage housing 35. There is an I-shaped groove that slides and adapts to the I-shaped slide bar 38 on the same side. When the cylinder 25 pushes the lower material cutting blade 24 to move upward, the lower linkage tooth plate 37 moves upward synchronously and drives the linkage gear 36 to rotate, which in turn drives the upper linkage tooth plate 37 to move downward in the opposite direction. Finally, the two material cutting blades 24 are simultaneously closed and sheared in opposite directions. The cooperation between the I-shaped slide bar 38 and the I-shaped groove provides precise sliding guidance for the linkage tooth plate 37, ensuring stable meshing transmission between the linkage gear 36 and the linkage tooth plate 37 and avoiding tooth dislocation.

[0063] A receiving box 9 is provided on the bottom side inside the housing 1. The receiving box 9 is located directly below the fixed upsetting die 5 and is used to receive the cold-forged parts cut by the cutting component 7 and pushed down by the subsequent wire, realizing automatic collection of finished products. A limiting frame 50 is fixedly connected to the inner wall of the housing 1 at the position corresponding to the receiving box 9. The receiving box 9 is inserted into the limiting frame 50. The limiting frame 50 limits the position of the receiving box 9 on all four sides to ensure that it is always aligned with the bottom of the cutting station. Damping slots are opened on the opposite sides of the inner wall of the limiting frame 50. Damping strips 51 that can be inserted into the damping slots are fixedly connected to both sides of the receiving box 9. The receiving box 9 is engaged with the limiting frame 50 through the damping strips 51, which can generate stable insertion and extraction resistance, offset the vibration of the equipment operation and prevent the receiving box 9 from slipping. At the same time, no additional locking structure is required, and the pull-out operation is simple, which facilitates the collection and transfer of finished products.

[0064] When using:

[0065] The wire threading and centering process involves threading the metal wire through the outer end of the wire input cylinder 40. The motor 39 is started, and the rotating cylinder 41 is driven to rotate through the synchronous pulley 43 and the synchronous belt 44. This, in turn, drives the disc 42 to rotate synchronously. When the disc 42 rotates, the inclined surface of the inclined wheel track squeezes the roller 46, pushing all the anti-deviation sliding pillars 45 to slide synchronously towards the central axis of the wire input cylinder 40. This causes the anti-deviation wheels 47 of the annular array to abut against the outer wall of the wire, completing the radial centering and anti-deviation of the wire input end. The wire continues to feed towards the fixed upsetting die 5 along the centering path. During this process, the spring 49 provides elastic buffering to absorb the small vibrations of the wire feed and ensure smooth wire feeding.

[0066] The end of the wire is positioned inside the mold cavity. After the end of the wire is fed into the mold cavity of the fixed upsetting mold 5 and reaches the designated position, the upper and lower cylinders 18 on the mounting frame 17 extend their piston rods simultaneously, pushing the linkage plate 19 to feed towards the fixed upsetting mold 5. Through the sliding column 20, the two anti-deviation clamping plates 21 move towards the center of the mold cavity simultaneously, clamping the end of the wire from the upper and lower directions, completing the positioning inside the mold cavity before cold upsetting, and providing a position reference for the cold upsetting operation.

[0067] Synchronous cold forging: Motor 10 starts and drives crank connecting rod 11 to rotate. The rotational motion is converted into horizontal reciprocating linear motion of mounting plate 13 through hinge arm 12. Mounting plate 13 is smoothly pushed along guide rod 15, driving multiple sets of movable forging dies 3 to close synchronously with the corresponding fixed forging die 5. High-pressure cold forging is applied to the end of the wire to form the bolt head. During the cold forging process, anti-deviation clamping plate 21 continuously clamps the wire, directly offsetting the radial impact force generated by the forging pressure, preventing the wire from shifting or moving within the die cavity, and ensuring the coaxiality of the bolt head and the rod. After the cold forging is completed, motor 10 drives the movable forging die 3 to reset, and cylinder 18 synchronously drives the anti-deviation clamping plate 21 to retract and loosen.

[0068] For cutting and unloading, according to the length specifications of the bolt to be processed, the motor 26 is started in advance to drive the threaded rod 27 to rotate. Under the action of thread transmission, the threaded sleeve 28 moves horizontally along the limit rod 29, driving the material distribution frame 23 to move along the guide rod 31 to the target cutting position. After the cold heading is completed and the heading die is reset, the cylinder 25 extends the piston rod to push the lower material distribution blade 24 to move upward. The lower linkage tooth plate 37 moves upward accordingly. Through the meshing transmission of the linkage gear 36, the upper linkage tooth plate 37 moves downward. Finally, the upper and lower material distribution blades 24 are synchronously closed in opposite directions, cutting the formed bolt workpiece flat from the wire body. The cut bolt workpiece is stored inside the fixed heading die 5 and slides out of the fixed heading die 5 under the push of the subsequent wire. Then, under the action of gravity, it falls accurately into the receiving box 9 below.

[0069] The process involves cyclic processing and material collection. After the cutting is completed, cylinder 25 drives the dividing knife 24 to reset, and the wire continues to move forward to the set length. The above process of wire feeding centering, in-mold positioning, cold heading, cutting and unloading is repeated to realize continuous batch processing of bolts. When the finished product in the receiving box 9 is full, the working door plate 2 is opened, and the receiving box 9 is pulled out from the limiting frame 50 to overcome the resistance of the damping insert 51. The finished bolts can then be taken out, emptied, and reinserted into the limiting frame 50 to continue production.

Claims

1. A cold heading device for bolt processing to prevent misalignment, characterized in that: Includes the housing (1); The working door panel (2) is hinged to the front opening of the housing (1) and is used to pick up cold-formed parts; Multiple sets of cold heading die units, each set of cold heading die units includes movable heading die (3) and fixed heading die (5) that are arranged relatively and cooperate with each other; The upsetting die motion mechanism (4) is located inside the housing (1) and is used to drive multiple movable upsetting dies (3) to move synchronously toward the corresponding fixed upsetting die (5) to achieve cold upsetting; There are several wire input cylinders (40) and they are arranged one by one with multiple sets of cold heading die units. The wire input cylinders (40) are fixedly connected to one side of the housing (1). The anti-deviation unit includes an internal cold heading anti-deviation component (6) and an external wire inlet anti-deviation component (8). The internal cold heading anti-deviation component (6) is installed on a fixed heading die (5) and is used to prevent the wire in the fixed heading die (5) from deviating. The external wire inlet anti-deviation component (8) is installed on a wire inlet cylinder (40) and is used to prevent the wire in the wire inlet cylinder (40) from deviating. The cutting assembly (7) is set between the fixed upsetting die (5) and the wire input cylinder (40) for cutting the cold-forged part off the wire; The receiving box (9) is located inside the housing (1) and is used to receive the cold-formed parts cut off by the cutting assembly (7) and pushed down by the subsequent wire.

2. The anti-deviation cold heading equipment for bolt processing according to claim 1, characterized in that: The upsetting die motion mechanism (4) includes a motor (10) fixedly connected to the side of the housing (1), a crank connecting rod (11) rotatably connected inside the housing (1), several hinge arms (12) hinged to the crank connecting rod (11), and a mounting plate (13) hinged to the other end of the hinge arms (12). The output shaft of the motor (10) is fixedly connected to one end of the crank connecting rod (11). The movable upsetting die (3) is fixedly connected to the side of the mounting plate (13). Several guide sleeves (16) are fixedly connected to both ends of the mounting plate (13). A guide rod (15) is slidably connected to the inner wall of the guide sleeve (16). A fixing block (14) is fixedly connected to both ends of the guide rod (15). The fixing block (14) is fixedly connected to the inner wall of the housing (1).

3. The anti-deviation cold heading equipment for bolt processing according to claim 1, characterized in that: The internal cold heading anti-deviation assembly (6) includes a mounting bracket (17) fixedly connected to the fixed heading mold (5). A cylinder (18) is fixedly connected to both the upper and lower surfaces of the mounting bracket (17). A linkage plate (19) is fixedly connected to the piston rod end of the cylinder (18) at the upper position and the piston rod end of the cylinder (18) at the lower position. A plurality of sliding columns (20) facing the fixed heading mold (5) are fixedly connected to the side of the linkage plate (19). The sliding columns (20) slide through and extend into the interior of the fixed heading mold (5). An anti-deviation clamping plate (21) is fixedly connected to one end of the sliding column (20) inside the fixed heading mold (5).

4. The anti-deviation cold heading equipment for bolt processing according to claim 1, characterized in that: The cutting assembly (7) includes an adjustment mechanism and a material distribution frame (23) mounted on the adjustment mechanism. The adjustment mechanism is used to horizontally adjust the material distribution frame (23). The material distribution frame (23) has two material distribution blades (24) arranged opposite to each other, one above the other. A cylinder (25) is fixedly connected to the lower surface of the material distribution frame (23). The piston rod end of the cylinder (25) is fixedly connected to the material distribution blade (24) at the lower position. A linkage mechanism is provided on the side of the material distribution frame (23). The linkage mechanism is used to extend the cylinder (25). The compression drives the two distributing blades (24) to move synchronously relative to each other. Several support rods (33) are fixedly connected to the side of the distributing frame (23). Support sleeves (34) that are slidably sleeved on the outer wall of the support rods (33) are fixedly connected to the side of the distributing blades (24). Guide sleeves (32) are fixedly connected to the four corners of the distributing frame (23). Guide rods (31) are slidably passed through the inner wall of the guide sleeves (32). Fixing blocks (30) are fixedly connected to both ends of the guide rods (31). Fixing blocks (30) are fixedly connected to the inner wall of the shell (1).

5. The anti-deviation cold heading equipment for bolt processing according to claim 4, characterized in that: The adjustment mechanism includes an adjustment shell (22) fixedly connected to the inner wall of the housing (1). A second motor (26) is fixedly connected to the side of the adjustment shell (22). A threaded rod (27) is rotatably connected to the inner wall of the adjustment shell (22). The output shaft of the second motor (26) is fixedly connected to one end of the threaded rod (27). A threaded sleeve plate (28) is threadedly connected to the outer wall of the threaded rod (27). The lower surface of the threaded sleeve plate (28) is fixedly connected to the upper surface of the material distribution frame (23). A number of limiting rods (29) are fixedly connected to the inner wall of the adjustment shell (22). The threaded sleeve plate (28) is slidably connected to the outer wall of the number of limiting rods (29).

6. The anti-deviation cold heading equipment for bolt processing according to claim 4, characterized in that: The linkage mechanism includes a linkage shell (35) fixedly connected to the side of the material distribution frame (23). A linkage gear (36) is rotatably connected to the inner wall of the linkage shell (35). Linkage gears (37) are meshed on both sides of the linkage gear (36). The two linkage gears (37) are staggered. One end of the linkage gear (37) passes through the channel opened on the side of the linkage shell (35) and is fixedly connected to the material distribution knife (24) at the corresponding position. Two I-shaped slide bars (38) are fixedly connected to the inner wall of the linkage shell (35). The side of the linkage gear (37) is provided with an I-shaped slide groove that is adapted to slide with the I-shaped slide bar (38) at the same position.

7. The anti-deviation cold heading equipment for bolt processing according to claim 1, characterized in that: The external wire inlet anti-deviation assembly (8) includes a motor three (39) fixedly connected to the side of the housing (1). A rotating drum (41) is rotatably connected to the outer wall of the wire input drum (40). A synchronous pulley (43) is fixedly connected to the outer wall of the rotating drum (41) and the outer wall of the output shaft of the motor three (39). A synchronous belt (44) is connected between two adjacent synchronous pulleys (43). A disc (42) is fixedly connected to the outer wall of the rotating drum (41). Several inclined wheel tracks are opened on the disc (42), and rollers (46) are rolledly connected to the inner wall of the inclined wheel tracks. Several anti-deviation sliding columns (45) arranged in a ring array are slidably connected to the wire input drum (40). The rollers (46) are fixedly connected to the outer end of the anti-deviation sliding column (45). The inner end of the anti-deviation sliding column (45) slides into the inside of the wire input drum (40) and is fixedly connected to an anti-deviation wheel (47).

8. The anti-deviation cold heading equipment for bolt processing according to claim 7, characterized in that: The outer wall of the anti-slip column (45) is fixedly connected to a limiting ring (48), and a spring (49) is fixedly connected between the limiting ring (48) and the wire input cylinder (40). The spring (49) is sleeved on the outside of the anti-slip column (45).

9. The anti-deviation cold heading equipment for bolt processing according to claim 1, characterized in that: A limiting frame (50) is fixedly connected to the inner wall of the housing (1) at the position corresponding to the receiving box (9), and the receiving box (9) is inserted inside the limiting frame (50).

10. The anti-deviation cold heading equipment for bolt processing according to claim 9, characterized in that: The inner walls of the limiting frame (50) are provided with damping slots on opposite sides, and the receiving box (9) is fixedly connected with a damping insert (51) that is inserted into the damping slot.

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