Forging and pressing device for bolt production

Abstract

The invention relates to the technical field of machining, and provides a forging and pressing device for bolt production, which comprises a lower die and a guide post, a top plate is mounted at the top end of the guide post, a hydraulic cylinder is mounted at the top of the top plate, and an upper die slidably sleeving the outer surface of the guide post is fixedly mounted at the telescopic end of the hydraulic cylinder. An adaptive groove is formed in the top of the lower die, and a first transmission groove is formed in the bottom of the adaptive groove. According to the device, a telescopic rod is controlled to drive a first piston to push an inner cavity of a second transmission groove, transmission liquid in the inner cavity is compressed, a jacking column and a jacking block are jacked upwards, and a bolt is driven to move upwards and protrude out of the upper surface of a lower die; and the bottom of the upper die is just matched with the ejector block to punch off the waste outer ring of the bolt, so that the bolt is prevented from being subjected to secondary punch forming, and the working efficiency of the device is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, and in particular to a forging device used for bolt production. Background Art

[0002] Bolts are a common fastener used in mechanical processing and industrial fields. They cooperate with the corresponding nuts and can withstand great pressure and tension. Forging devices are required for bolt production. Forging is the combined name of forging and stamping. The hammer of the forging machine or the connected die is used to press the blank to make it plastically deform, so as to obtain a forming method of the desired shape and size. In the prior art, when the forging device is working, the hydraulic cylinder drives the die to move downward, and the bottom of the forging die is provided with the shape of a bolt. The head of the blank is squeezed and plastically deformed under the limitation of the forging die. The deformed part fills the inner cavity of the die to form the bolt. However, when the die moves downward to the limit, an additional waste circle (such as Figure 2 As shown in the figure, usually, the waste ring will be removed in the next process through the stamping procedure, but this undoubtedly increases the production steps of the bolt. Since the extra waste ring generated by the forging die cannot be removed immediately after one-time forming, it causes waste in process cost. The manufacturing cost control of the bolt is not efficient enough. Therefore, it is urgent to solve this problem. Summary of the invention

[0003] The present invention provides a forging device for bolt production, which solves the problem in the related art that scraps cannot be removed synchronously.

[0004] The technical scheme of the present invention is as follows: a forging device for bolt production, comprising a lower die and a guide column, a top plate is installed on the top of the guide column, a hydraulic cylinder is installed on the top of the top plate, an upper die slidingly sleeved on the outer surface of the guide column is fixedly installed on the telescopic end of the hydraulic cylinder, an adaption groove is provided on the top of the lower die, a transmission groove 1 is provided on the bottom of the adaption groove, a transmission groove 2 connected to the transmission groove 1 is provided inside the lower die, the inner cavities of the transmission groove 1 and the transmission groove 2 are filled with transmission fluid, a telescopic rod is installed on the side of the lower die, a piston 1 is installed on the telescopic end of the telescopic rod, a top column is provided on the internal sealing sleeve of the transmission groove 1, and a top block is fixedly connected to the top of the top column; A placement cavity is provided in the middle of the upper mold, a limit ring is rotatably installed at the bottom of the inner wall of the placement cavity, a spline is fixedly connected to the top of the inner wall of the placement cavity, a sleeve is slidably installed on the outer surface of the spline, a forming block located on the inner side of the limit ring is fixedly connected to the bottom of the sleeve, a plurality of groups of give way grooves are provided on the outer surface of the forming block, a plurality of groups of protrusions are provided on the top of the inner ring surface of the limit ring, six groups of slots with equal angles are provided on the outer surface of the limit ring, and a magnetic column and a spring are movably sleeved inside the slot; The interior of the placement chamber is also fixedly installed with a placement cylinder located on the right side of the limit ring, the top of the placement cylinder is fixedly connected to a sealing cylinder, the internal sealing sleeve of the sealing cylinder is provided with a piston 2, the top of the piston 2 extends upward to the top of the upper mold, the inner side of the placement cylinder is respectively fixedly connected with a limit plate 1 and a limit plate 2 adapted to abut against the outer ring surface of the limit ring, the inner wall sealing sleeve of the placement cylinder is provided with a rotating column and a spring 2, one end of the rotating column is elastically supported in the placement cylinder by the spring 2, the other end of the rotating column is fixedly connected with a block and abuts against the magnetic column, and the inner cavities of the placement cylinder and the sealing cylinder are filled with another set of transmission fluid.

[0005] Preferably, the top block is adapted to be arranged in the adapting groove and to be kept flush with the top of the lower mold, the piston one sealing sleeve is arranged on the right side of the inner wall of the transmission groove two, and the inner diameter value of the piston one is greater than the inner diameter value of the transmission groove one.

[0006] Preferably, a rubber block is glued to the bottom of the piston 2, and the top of the piston 2 abuts against the bottom of the top plate. When the top of the upper mold abuts against the bottom of the top plate, the rotating column drives the abutment block to rotate 60° around the axis of the upper mold.

[0007] Preferably, the give-way grooves are arranged in three groups and are distributed at equal angles on the outer peripheral surface of the forming block, the protrusions are arranged in three groups and are distributed at equal angles on the inner ring surface of the limiting ring, the protrusions are located above the forming block, the give-way grooves and the protrusions form an angle of 60°, and the outer dimensions of the stop blocks are smaller than the give-way grooves.

[0008] Preferably, the rear side of the second limiting plate is arranged vertically and tangent to the outer surface of the limiting ring, the second limiting plate is located at the right rear side of the outer circumference of the limiting ring, and the first limiting plate is located at the right front side of the outer circumference of the limiting ring.

[0009] Preferably, a magnet is fixedly mounted on the left rear side of the inner wall of the placement cavity, a buffer block is glued to one end of the magnet facing the axis of the limiting ring, and the buffer block abuts against one end of the outer side of one group of the magnetic columns.

[0010] Preferably, the placement tube is a tubular structure bent at about 90°, and the rotation axis of the placement tube is colinear with the axis of the limiting ring.

[0011] Preferably, the two ends of the second spring are elastically connected to the rotating column and one end of the inner wall of the placing cylinder respectively, and another group of the transmission fluid is sealed and abutted against the inner end of the rotating column and the second piston and the bottom end of the rubber block respectively, and the inner diameter value of the sealing cylinder is greater than the inner diameter value of the placing cylinder.

[0012] Preferably, the stop block is hemispherical, the edge of the outer end of the magnetic column is an arc transition, the outer surface of the stop block abuts against the outer surface of a group of magnetic columns located directly in front, a reset groove is provided at the inner end of the magnetic column, and the two ends of the spring are elastically connected to the clamping groove and the reset groove respectively.

[0013] Preferably, a molding cavity penetrating into the placement cavity is formed at the bottom of the upper mold, and the bottom of the molding block abuts against the bottom of the inner wall of the placement cavity.

[0014] The working principle and beneficial effects of the present invention are: 1. This device has been redesigned to realize the automatic blanking function of the outer ring of the formed bolt waste. By setting an upper die with a placement cavity in the middle, and designing a spline and a sleeve to install a forming block, which flexibly cooperates with the forming cavity at the bottom of the upper die, the hydraulic cylinder drives the upper die to move downward on both sides, and the waste outer ring can be removed after the bolt is formed. By setting a limit ring and three groups of protrusions installed on its inner circumference, the protrusions abut against the upper surface of the forming block and form a 60° staggered angle with the three groups of easing grooves. At the original angle, the protrusions are staggered with the easing grooves and abut against the forming block, making the forming block unable to move, so that the device completes the bolt forging operation. Then, after completing the first downward movement operation, the upper die is driven to move upward by controlling the hydraulic cylinder. And reversely press piston 2, compress the transmission fluid in the sealing cylinder, transfer the pressure to the rotating column, make the rotating column just rotate 60° along the inner wall of the placement cylinder, make the magnetic column and the limit ring abut by rotation, synchronously drive and rotate 60°, drive the convex block to the position coincident with the give way groove, at this time, by controlling the telescopic rod to drive piston 1 to push the inner cavity of transmission groove 2, compress the transmission fluid inside, push the top column and the top block upward, drive the bolt to move upward, and protrude from the upper surface of the lower die, at this time, when the upper die moves downward, it will cause the bolt to push the forming block upward and move upward, and the bottom of the upper die just cooperates with the top block to punch out the waste outer ring of the bolt, avoiding the need for a second stamping of the bolt, effectively improving the working efficiency of the device.

[0015] 2. The device is also designed with limit plate 1 and limit plate 2 located in the placement cavity, so that the magnetic column is automatically squeezed into the slot when it is driven to the vicinity of limit plate 2. At the same time, the limit plate 1 is used to limit the magnetic column so that it will not protrude before it moves to the side of the resistance block. When the hydraulic cylinder drives the upper mold to move upward, piston 2 abuts against the top plate and moves downward, which can push the rotating column and the resistance block to rotate 60°. When the magnetic column moves to the front, it just abuts against the resistance block. When the magnetic column rotates 180° from the front and continues to rotate, it contacts the curved part of limit plate 2 and is squeezed into the slot. The power for outward movement is obtained by compressing spring 1, thereby avoiding the limit ring from getting stuck during rotation. At the same time, the spring 1 acts on the magnetic column to abut against limit plate 2 and limit plate 1 and generate friction, thereby eliminating the relationship between the limit ring as a whole when being pushed by the rotating column and the resistance block, so that the angle of each rotation of the limit ring is more accurate.

[0016] 3. The device also installs a group of magnets and buffer blocks on the left rear side of the limit ring to complete the magnetic positioning function of the limit ring for every two rotations. After the limit ring is pushed by the rotating column for the first rotation, a group of magnetic columns closest to the magnet will be aligned with the magnet through the buffering of the buffer block, and the rotation angle will be adjusted through the magnetic connection. When the axis of the magnet and the magnetic column move to the same line, the magnetic attraction force is the largest. At this time, the rotation angle of the limit ring can be determined to be 60°. The device is designed with six groups of magnetic columns to ensure that there is a group of magnetic columns cooperating with the magnet after each rotation, which helps to improve the stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Figure 1 It is a three-dimensional cutaway schematic diagram of the needle structure of the present invention; Figure 2 It is a schematic diagram of the formed bolt of the present invention; Figure 3 For the present invention Figure 1 A magnified schematic diagram of the structure at center A; Figure 4 It is a schematic diagram of the separation of the lower mold, the top block, the top column, the telescopic rod and the piston 1 of the present invention; Figure 5 It is a schematic diagram of the separation of the upper mold and the placement tube of the present invention; Figure 6 It is a top view cutaway schematic diagram of the upper mold of the present invention; Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at B in the middle; Figure 8 It is a schematic diagram of separation of the upper mold of the present invention; Fig. 9It is the internal schematic diagram of the upper mold of the present invention; Fig.10 It is a front perspective schematic diagram of the overall structure of the present invention.

[0019] In the figure: 10, lower die; 11, adapter groove; 12, transmission groove one; 13, ejector block; 14, ejector column; 15, transmission groove two; 16, telescopic rod; 17, piston one; 20, guide column; 30, ejector plate; 40, hydraulic cylinder; 50, upper die; 51, placement cavity; 52, limit ring; 53, convex block; 54, spline; 55, sleeve; 56, forming block; 57, clearance groove; 58, magnet; 59, buffer block; 510, slot; 511, magnetic column; 512, spring one; 513, reset groove; 60, placement cylinder; 61, spring two; 62, rotating column; 63, stop block; 64, limit plate one; 65, limit plate two; 66, sealing cylinder; 67, piston two; 68, rubber block; 7, bolt. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment 1: A forging device for bolt production, comprising a lower die 10 and a guide column 20, a top plate 30 is installed on the top of the guide column 20, a hydraulic cylinder 40 is installed on the top of the top plate 30, an upper die 50 slidably sleeved on the outer surface of the guide column 20 is fixedly installed on the telescopic end of the hydraulic cylinder 40, an adapting groove 11 is provided on the top of the lower die 10, a transmission groove 12 is provided on the bottom of the adapting groove 11, a transmission groove 2 15 connected to the transmission groove 12 is provided inside the lower die 10, the inner cavities of the transmission groove 12 and the transmission groove 2 15 are filled with transmission fluid, a telescopic rod 16 is installed on the side of the lower die 10, a piston 17 is installed on the telescopic end of the telescopic rod 16, a top column 14 is provided on the inner sealing sleeve of the transmission groove 12, and a top block 13 is fixedly connected to the top of the top column 14; A placement cavity 51 is provided in the middle of the upper die 50, a limit ring 52 is rotatably installed at the bottom of the inner wall of the placement cavity 51, a spline 54 is fixedly connected to the top of the inner wall of the placement cavity 51, a sleeve 55 is slidably installed on the outer surface of the spline 54, a forming block 56 located on the inner side of the limit ring 52 is fixedly connected to the bottom of the sleeve 55, a plurality of groups of paving grooves 57 are provided on the outer surface of the forming block 56, a plurality of groups of protrusions 53 are provided on the top of the inner ring surface of the limit ring 52, six groups of slots 510 distributed at equal angles are provided on the outer surface of the limit ring 52, a magnetic column 511 and a spring 1 512 are movably sleeved inside the slot 510; A placing cylinder 60 located on the right side of the limiting ring 52 is also fixedly installed inside the placing cavity 51, and a sealing cylinder 66 is fixedly connected to the top of the placing cylinder 60. The internal sealing sleeve of the sealing cylinder 66 is provided with a piston 2 67, and the top of the piston 2 67 extends upward to the top of the upper mold 50. The inner side of the placing cylinder 60 is respectively fixedly connected with a limiting plate 1 64 and a limiting plate 2 65 adapted to abut against the outer ring surface of the limiting ring 52. The inner wall sealing sleeve of the placing cylinder 60 is provided with a rotating column 62 and a spring 2 61. One end of the rotating column 62 is elastically supported in the placing cylinder 60 by the spring 2 61, and the other end of the rotating column 62 is fixedly connected with a block 63 and abuts against the magnetic column 511. The inner cavities of the placing cylinder 60 and the sealing cylinder 66 are filled with another group of transmission fluid. The device has been redesigned to realize the automatic blanking function of the waste outer ring of the formed bolt 7. By providing an upper die 50 with a placement cavity 51 in the middle thereof, and designing a spline 54 and a sleeve 55 with a forming block 56 installed, which flexibly cooperates with the forming cavity at the bottom of the upper die 50, the hydraulic cylinder 40 drives the upper die 50 to move downward on both sides, so that the waste outer ring of the bolt 7 can be removed after the bolt 7 is formed. By providing a limiting ring 52 and three groups of protrusions 53 installed on its inner circumference, the protrusions 53 abut against the upper surface of the forming block 56 and form a 60° staggered angle with the three groups of easing grooves 57. At the original angle, the protrusions 53 are staggered with the easing grooves 57 and abut against the forming block 56, so that the forming block 56 cannot move, so that the device completes the forging operation of the bolt 7. Then, after completing the first downward movement operation, the upper die 50 is driven to move upward by controlling the hydraulic cylinder 40, and reversely The piston 1 17 is pressed toward the pressing piston 2 67, compressing the transmission fluid in the sealing cylinder 66, and transmitting the pressure to the rotating column 62, so that the rotating column 62 just rotates 60° along the inner wall of the placing cylinder 60, and the magnetic column 511 and the limit ring 52 are synchronously driven and rotated 60° through rotational abutment, and the protrusion 53 is driven to a position coincident with the clearance groove 57. At this time, the piston 1 17 is driven toward the inner cavity of the transmission groove 2 15 by controlling the telescopic rod 16 to compress the transmission fluid inside, and the top column 14 and the top block 13 are pushed upward, driving the bolt 7 to move upward and protrude from the upper surface of the lower mold 10. At this time, when the upper mold 50 moves downward, the bolt 7 will push the forming block 56 upward and move upward, and the bottom of the upper mold 50 just cooperates with the top block 13 to punch out the waste outer ring of the bolt 7, avoiding the need for the bolt 7 to be stamped for a second time, thereby effectively improving the working efficiency of the device.

[0022] The device is also designed with a limit plate 1 64 and a limit plate 2 65 located in the placement cavity 51, so that the magnetic column 511 is automatically squeezed into the card slot 510 when it is driven to the vicinity of the limit plate 2 65. At the same time, the limit plate 1 64 is used to limit the magnetic column 511 so that it will not protrude before it moves to the side of the stop block 63. When the hydraulic cylinder 40 drives the upper mold 50 to move upward, the piston 2 67 abuts against the top plate 30 and moves downward, which can push the rotating column 62 and the stop block 63 to rotate 60°. When the magnetic column 511 moves to the front, it just abuts against the stop block 63. After 511 rotates 180° from the front and continues to rotate, it contacts the curved part of the limit plate 2 65 and is squeezed into the slot 510. The power for outward movement is obtained by compressing the spring 1 512, thereby preventing the limit ring 52 from getting stuck during rotation. At the same time, the spring 1 512 acts on the magnetic column 511 to abut against the limit plate 2 65 and the limit plate 1 64 and generate friction, thereby eliminating the relationship between the limit ring 52 as a whole when being pushed by the rotating column 62 and the stop block 63, so that the angle of rotation of the limit ring 52 each time is more precise.

[0023] Embodiment 2: The top block 13 is adapted to be arranged in the adapting groove 11 and is kept flush with the top of the lower mold 10. The sealing sleeve of the piston 17 is arranged on the right side of the inner wall of the transmission groove 2 15. The inner diameter of the piston 17 is greater than the inner diameter of the transmission groove 12. The top block 13 is integrated with the lower die 10 under normal forging operation, and cooperates with the upper die 50 to complete the forging of the bolt 7. When removing the outer ring of the waste material, the top block 13 is pushed upward by the telescopic rod 16 and the piston 17, so that the upper die 50 can produce a height difference with the lowest point of the top block 13 during the downward movement, and realize the function of automatically punching out the waste material.

[0024] Embodiment 3: A rubber block 68 is glued to the bottom of the second piston 67, and the top of the second piston 67 abuts against the bottom of the top plate 30. When the top of the upper mold 50 abuts against the bottom of the top plate 30, the rotating column 62 drives the abutment block 63 to rotate 60° around the axis of the upper mold 50. Each time the hydraulic cylinder 40 drives the upper die 50 to move upward, the piston 2 67 is abutted by the top plate 30 once and moves downward along the inner wall of the sealing cylinder 66, that is, it pushes the rotating column 62 to complete a 60° rotation operation, so that the positioning groove 57 and the protrusion 53 are staggered by 60°, move once to overlap, and realize the blanking function, and move once more to complete the staggering, so that the protrusion 53 abuts against the forming block 56, fixing the forming block 56 so that it does not move upward.

[0025] Embodiment 4: The clearance grooves 57 are arranged in three groups and are evenly distributed on the outer peripheral surface of the forming block 56. The protrusions 53 are arranged in three groups and are evenly distributed on the inner ring surface of the limiting ring 52. The protrusions 53 are located above the forming block 56. The clearance grooves 57 and the protrusions 53 form an angle of 60°. The outer dimensions of the abutment block 63 are smaller than the clearance grooves 57. The protrusions 53 and the clearance grooves 57 are staggered and arranged at 60°. Every time the hydraulic cylinder 40 drives the upper die 50 to move upward, the distribution of the clearance grooves 57 and the protrusions 53 will change. When the protrusions 53 and the clearance grooves 57 are staggered, the protrusions 53 just abut against the limit above the forming block 56 and fix the forming block 56 to complete the forging preparation. When the protrusions 53 are driven by the limit ring 52 to rotate 60°, the protrusions 53 and the clearance grooves 57 overlap, so that the forming block 56 can move freely upward through the protrusions 53, thereby realizing the function of punching out the waste material of the bolts 7.

[0026] Embodiment 5: The rear side of the second limiting plate 65 is arranged vertically and is tangent to the outer surface of the limiting ring 52. The second limiting plate 65 is located at the right rear side of the outer peripheral surface of the limiting ring 52, and the first limiting plate 64 is located at the right front side of the outer peripheral surface of the limiting ring 52. like Figure 6 As shown, when the magnetic column 511 located on the left rear side is rotated close to the limiting plate 65 by the limiting ring 52, the axis of the magnetic column 511 forms a certain angle with the limiting plate 65, and then the magnetic column 511 is pushed into the slot 510 without loss through the limiting of the limiting plate 65, so that the magnetic column 511 reaches a lossless state during the retraction and release process.

[0027] Embodiment 6: A magnet 58 is fixedly installed on the left rear side of the inner wall of the placement cavity 51, and a buffer block 59 is glued to one end of the magnet 58 facing the axis of the limiting ring 52, and the buffer block 59 abuts against one end of the outer side of one group of magnetic columns 511; The device also installs a group of magnets 58 and buffer blocks 59 on the left rear side of the limit ring 52 to complete the magnetic positioning function of the limit ring 52 every two rotations. After the limit ring 52 is pushed by the rotating column 62 for the first rotation, a group of magnetic columns 511 closest to the magnet 58 will be aligned with the magnet 58 through the buffering of the buffer block 59, and the rotation angle is adjusted through the magnetic connection. When the axes of the magnet 58 and the magnetic columns 511 move to the same line, the magnetic attraction force is the largest. At this time, the rotation angle of the limit ring 52 can be determined to be 60°. The device is designed with six groups of magnetic columns 511 to ensure that after each rotation, there is a group of magnetic columns 511 cooperating with the magnet 58, which helps to improve the stability of the device.

[0028] Embodiment 7: The placement tube 60 is a tubular structure bent at about 90 degrees, and the rotation axis of the placement tube 60 is colinear with the axis of the limiting ring 52; The placement cylinder 60 with a curved design is a rotating container for the rotating column 62 , which is scanned and formed around the axis of the limiting ring 52 so that the rotating column 62 can rotate freely around the axis of the limiting ring 52 .

[0029] Embodiment 8: The two ends of the second spring 61 are elastically connected to the rotating column 62 and one end of the inner wall of the placing cylinder 60 respectively, and another group of transmission fluid is sealed against the inner end of the rotating column 62 and the bottom end of the second piston 67 and the rubber block 68 respectively. The inner diameter of the sealing cylinder 66 is greater than the inner diameter of the placing cylinder 60; The function of the second spring 61 is to pull the rotating column 62 to reset it, and through the rotating column 62, the transmission fluid in the placement cylinder 60 is pressed, the transmission fluid is returned upward to the sealing cylinder 66, and the second piston 67 is driven to reset.

[0030] Embodiment 9: The abutment block 63 is hemispherical, and the outer edge of one end of the magnetic column 511 is an arc transition. The outer surface of the abutment block 63 abuts against the outer surface of a group of magnetic columns 511 located directly in front. A reset groove 513 is provided at one end of the inner side of the magnetic column 511, and the two ends of the spring 1 512 are elastically connected to the clamping groove 510 and the reset groove 513 respectively. The hemispherical design of the stopper 63 allows for buffering of the contact between the stopper 63 and the magnetic column 511, thereby avoiding damage to the sharp parts.

[0031] Embodiment 10: The bottom of the upper mold 50 is provided with a molding cavity penetrating into the placement cavity 51, and the bottom of the molding block 56 abuts against the bottom of the inner wall of the placement cavity 51; The molding cavity at the bottom of the upper mold 50 is used to accommodate the head of the bolt 7 that has undergone plastic deformation, and the molding block 56 cooperates with it to form a closed space. When the molding block 56 can move upward, the device enters the waste blanking stage.

[0032] Working principle: First, the robot arm puts the blank into the top block 13, and the top convex part of the blank is just stuck on the top of the lower die 10. At this time, the hydraulic cylinder 40 is started to drive the top plate 30 and the upper die 50 to move downward for the first time. The upper die 50 moves vertically downward along the outer surface of the guide column 20 as a whole, driving the forming block 56 to press the convex part of the top of the blank downward. The blank undergoes plastic deformation and quickly fills the space between the forming cavity at the bottom of the upper die 50 and the bottom of the forming block 56. At this time, the formed bolt 7 is Figure 2 That way, its raised outer edge creates an outer ring of waste; Then, the hydraulic cylinder 40 is controlled to drive the upper mold 50 to reset upward to the original height and then continue to move upward. At this time, the piston 2 67 abuts against the bottom of the top plate 30 and moves downward relatively in the inner wall of the sealing cylinder 66, compressing the transmission fluid in the inner cavity of the sealing cylinder 66 and the placement cylinder 60, and transmitting the pressure to the rotating column 62, so that the rotating column 62 and the stop block 63 rotate 60° clockwise around the axis of the limiting ring 52, and at the same time stretching the spring 2 61, the stop block 63 drives the magnetic column 511 protruding at the front side, and drives the limiting ring 52 to rotate as a whole. At this time, the protrusion 53 is driven by the rotation of the limiting ring 52 to coincide with the clearance groove 57, starting the telescopic rod 16, and driving the piston 1 17 to push toward the inner cavity of the transmission groove 2 15, and compressing the transmission fluid in the transmission groove 2 15 and the transmission groove 1 12, pushing the top column 14 and the top block 13 to move upward, and driving the bolt 7 to protrude from the top of the lower mold 10; Finally, the hydraulic cylinder 40 is started again, and the upper die 50 is driven to move downward as a whole, and the forming cavity at the bottom of the upper die 50 is adapted to pass through the bolt 7. Since the height of the bolt 7 is much higher than the depth of the forming cavity, when the upper die 50 continues to move downward, on the one hand, the forming block 56 will be pushed upward by the bolt 7, so that the groove 57 and the protrusion 53 just coincide with each other. At the same time, the bottom of the upper die 50 will punch out the waste outer ring of the bolt 7 to remove it. The hydraulic cylinder 40 is started again to drive the upper die 50 to move upward as a whole, and the clearance groove 57 is pressed, and the rotating column 62, the stop block 63, the magnetic column 511 and the limit ring 52 are driven to rotate 60 degrees again as a whole, and then the upper die 50 is driven to reset. At this time, the piston 67 is reset upward under the rebound force of the spring 61 and the transmission fluid, and the rotating column 62 and the stop block 63 are reset and separated from the contact with the magnetic column 511. Figure 5 As shown, the magnetic column 511 located at the front side rotates to a position abutting against the buffer block 59 and is magnetically connected to the magnet 58, and the magnetic column 511 originally located at this position rotates to a position abutting against the limit plate 2 65, and the curved arc design of the limit plate 2 65 presses the magnetic column 511 into the slot 510.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A forging device for bolt production, comprising a lower die (10) and a guide column (20), a top plate (30) being mounted on the top of the guide column (20), a hydraulic cylinder (40) being mounted on the top of the top plate (30), an upper die (50) being fixedly mounted on the telescopic end of the hydraulic cylinder (40) and being slidably sleeved on the outer surface of the guide column (20), characterized in that: The top of the lower mold (10) is provided with an adapting groove (11), the bottom of the adapting groove (11) is provided with a transmission groove 1 (12), the interior of the lower mold (10) is provided with a transmission groove 2 (15) which is in communication with the transmission groove 1 (12), the inner cavities of the transmission groove 1 (12) and the transmission groove 2 (15) are filled with transmission fluid, a telescopic rod (16) is installed on the side of the lower mold (10), a piston 1 (17) is installed at the telescopic end of the telescopic rod (16), the inner sealing sleeve of the transmission groove 1 (12) is provided with a top column (14), the top end of the top column (14) is fixedly connected with a top block (13); A placement cavity (51) is provided in the middle of the upper mold (50), a limit ring (52) is rotatably mounted on the bottom of the inner wall of the placement cavity (51), a spline (54) is fixedly connected to the top of the inner wall of the placement cavity (51), a sleeve (55) is slidably mounted on the outer surface of the spline (54), a forming block (56) located inside the limit ring (52) is fixedly connected to the bottom of the sleeve (55), a plurality of groups of clearance grooves (57) are provided on the outer surface of the forming block (56), a plurality of groups of protrusions (53) are provided on the top of the inner ring surface of the limit ring (52), six groups of slots (510) distributed at equal angles are provided on the outer surface of the limit ring (52), and a magnetic column (511) and a spring (512) are movably sleeved inside the slot (510); A placement cylinder (60) located on the right side of the limiting ring (52) is also fixedly installed inside the placement cavity (51). The top of the placement cylinder (60) is fixedly connected to a sealing cylinder (66). The internal sealing sleeve of the sealing cylinder (66) is provided with a second piston (67). The top of the second piston (67) extends upward to the top of the upper mold (50). The inner side of the placement cylinder (60) is respectively fixedly connected with a first limiting plate (64) and a second limiting plate (65) adapted to abut against the outer ring surface of the limiting ring (52). The inner wall sealing sleeve of the placement cylinder (60) is provided with a rotating column (62) and a second spring (61). One end of the rotating column (62) is elastically supported in the placement cylinder (60) by the second spring (61). The other end of the rotating column (62) is fixedly connected to a resisting block (63) and abuts against the magnetic column (511). The inner cavities of the placement cylinder (60) and the sealing cylinder (66) are filled with another group of transmission fluid.

2. A forging device for bolt production according to claim 1, characterized in that: The top block (13) is adaptably mounted in the adapting groove (11) and is kept flush with the top of the lower mold (10). The piston one (17) sealing sleeve is arranged on the right side of the inner wall of the transmission groove two (15). The inner diameter of the piston one (17) is greater than the inner diameter of the transmission groove one (12).

3. A forging device for bolt production according to claim 2, characterized in that: A rubber block (68) is glued to the bottom of the second piston (67), and the top of the second piston (67) abuts against the bottom of the top plate (30). When the top of the upper mold (50) abuts against the bottom of the top plate (30), the rotating column (62) drives the abutment block (63) to rotate 60° around the axis of the upper mold (50).

4. A forging device for bolt production according to claim 3, characterized in that: The clearance grooves (57) are arranged in three groups and are distributed at equal angles on the outer peripheral surface of the forming block (56); the protrusions (53) are arranged in three groups and are distributed at equal angles on the inner ring surface of the limiting ring (52); the protrusions (53) are located above the forming block (56); the clearance grooves (57) and the protrusions (53) form an angle of 60° with each other; and the outer dimensions of the stop block (63) are smaller than those of the clearance grooves (57).

5. A forging device for bolt production according to claim 4, characterized in that: The rear side of the second limiting plate (65) is arranged vertically and is tangent to the outer surface of the limiting ring (52); the second limiting plate (65) is located on the right rear side of the outer peripheral surface of the limiting ring (52); and the first limiting plate (64) is located on the right front side of the outer peripheral surface of the limiting ring (52).

6. A forging device for bolt production according to claim 5, characterized in that: A magnet (58) is fixedly mounted on the left rear side of the inner wall of the placement cavity (51), and a buffer block (59) is glued to one end of the magnet (58) facing the axis of the limiting ring (52), and the buffer block (59) abuts against one end of the outer side of one group of the magnetic columns (511).

7. A forging device for bolt production according to claim 6, characterized in that: The placement tube (60) is a tubular structure bent at about 90 degrees, and the rotation axis of the placement tube (60) is colinear with the axis of the limiting ring (52).

8. A forging device for bolt production according to claim 7, characterized in that: The two ends of the second spring (61) are elastically connected to the rotating column (62) and one end of the inner wall of the placement tube (60), respectively. Another group of the transmission fluid is sealed against the inner end of the rotating column (62) and the bottom end of the second piston (67) and the rubber block (68), respectively. The inner diameter of the sealing tube (66) is greater than the inner diameter of the placement tube (60).

9. A forging device for bolt production according to claim 8, characterized in that: The abutment block (63) is hemispherical, and the edge of one outer end of the magnetic column (511) is an arc transition. The outer surface of the abutment block (63) abuts against the outer surface of a group of magnetic columns (511) located directly in front. A reset groove (513) is provided at one inner end of the magnetic column (511), and two ends of the spring 1 (512) are elastically connected to the clamping groove (510) and the reset groove (513) respectively.

10. A forging device for bolt production according to claim 9, characterized in that: The bottom of the upper mold (50) is provided with a molding cavity that penetrates into the placement cavity (51), and the bottom of the molding block (56) abuts against the bottom of the inner wall of the placement cavity (51).

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