Cold header for countersunk bolt machining

Abstract

The invention relates to the field of machining, in particular to a cold header for countersunk bolt machining, which comprises a supporting frame, a limiting frame is fixedly connected to the supporting frame, a driven disc is rotatably connected to the limiting frame, and a rotating disc is rotatably connected to the limiting frame. Due to the fact that the sliding die and the fixed die are not tightly attached, the bar can rapidly slide into the fixed die. Due to the fact that the sliding die is separated from the cold-heading bar, the cold-heading bar can move downwards under the action of the gravity pair. The friction between the bar and the sliding die and the friction between the bar and the fixed die can be reduced during feeding and discharging of the bar, so that the probability of strain of the bar during cold heading is reduced, and the cold heading quality of the bar is improved.

Description

Technical Field

[0001] The invention relates to the field of mechanical processing, in particular to a cold heading machine for processing countersunk bolts. Background Art

[0002] Cold heading equipment is mainly based on the theory of metal plastic deformation. It applies a certain pressure to the metal blank at room temperature to cause it to undergo plastic deformation in the die cavity and be formed into a specified shape and size. It is generally used in fastener processing. The bar is cold-forged into a bolt through cold heading equipment.

[0003] When existing cold heading equipment processes bar stock, most of them push the bar stock into the mold through the cold heading head. Since the hole size of the mold is roughly the same as the bar stock size, it requires a large force to push the bar stock into place. Moreover, when the cold-headed bar stock is pushed out of the mold, the bar stock will be closely attached to and rubbed against the inner wall of the mold, which can easily cause scratches on the surface of the bar stock. The bar stock will produce some metal debris after cold heading deformation. After multiple cold headings, the residual metal debris accumulates inside the mold. The residual metal debris will also cause scratches on the bar stock, resulting in poor cold heading quality of the bar stock. Summary of the invention

[0004] In order to overcome the shortcomings of existing equipment that the surface of the bar is easily scratched when the bar is fed and discharged, and the metal debris accumulated inside the mold will also cause scratches on the bar, thereby resulting in poor cold heading quality of the bar, the present invention provides a cold heading machine for countersunk bolts that can reduce friction when feeding and discharging the bar, and clean the metal debris, thereby improving the quality of the bar.

[0005] The technical solution is: a cold heading machine for countersunk bolt processing, including a support frame, a limiting frame is fixedly connected to the support frame, wherein:

[0006] A driven disk and a rotating disk are rotatably connected on the limiting frame, and the rotating disk is fixedly connected to the driven disk;

[0007] A hollow shaft motor is also fixedly connected to the support frame, and the hollow shaft of the hollow shaft motor is drivingly connected to the rotating disk;

[0008] The support frame is also provided with a cold heading mechanism, and the driven disk and the rotating disk are provided with a clamping mechanism, and a clamping space for clamping the bar material of the countersunk bolt is provided in the clamping mechanism, and the clamping space is provided along the diameter direction of the driven disk, and the inlet and outlet of the clamping space are led out from the outer ring surface of the driven disk, and when the clamping mechanism is rotated to the setting position of the cold heading mechanism, the corresponding clamping space and the cold heading mechanism are aligned and matched;

[0009] The driven disk is also provided with a discharging mechanism, which is used to control the rod material clamped therein to be sent out when the inlet and outlet of the corresponding clamping space move downward.

[0010] Optionally, the cold heading mechanism includes a mounting frame, wherein the mounting frame is fixedly connected to the support frame, a hydraulic rod is fixedly connected to the mounting frame, a cold heading head is fixedly connected to the telescopic rod of the hydraulic rod, and the telescopic direction of the telescopic rod of the hydraulic rod points to the center of the driven disk.

[0011] Optionally,

[0012] The mold clamping mechanism includes a fixed mold fixedly connected to the driven disk, and a sliding mold slidably connected to the rotating disk, so as to form the clamping space between the fixed mold and the sliding mold;

[0013] The mold clamping mechanism also includes a guide ring, which is fixedly connected to the limiting frame through a fixing frame, and a guide groove is opened on the guide ring;

[0014] A guide rod is fixedly connected to the sliding mold, and the guide rod is in contact with the guide groove of the guide ring. When the sliding mold rotates with the rotating disk, the guide rod reciprocates along the guide groove of the guide ring, driving the sliding mold to reciprocate in the direction of the fixed mold to control the clamping of the bar.

[0015] Optionally, four pairs of sliding dies and fixed dies are provided and are evenly spaced along the circumference of the driven disk.

[0016] Optionally, the discharging mechanism includes a top frame, and each fixed mold is slidably connected to a top frame, wherein:

[0017] The four top frames are slidably connected to the driven disc and extend to the bottom of the corresponding clamping space;

[0018] A push sheet is fixedly connected to each of the two symmetrical top frames, a push rod is fixedly connected to each sliding mold, each push rod has a slide groove, and the slide grooves of the two symmetrical push rods are slidably connected to the corresponding two push sheets;

[0019] When the sliding mold moves along the axial direction of the driven disk, the push rod moves synchronously. Through the transmission of the push rod and the push plate, the axial force is converted into radial force, driving the top frame to move along the axial direction of the corresponding fixed mold, thereby pushing the bar material at the bottom of the corresponding clamping space to be discharged.

[0020] Optionally, it also includes an air blowing mechanism, which is arranged on the support frame and is used to blow away metal debris, wherein:

[0021] Each set of sliding molds and fixed molds is also provided with a flow distribution frame, each flow distribution frame is provided with an air outlet connected to the corresponding clamping space, and each flow distribution frame is fixedly connected with a solenoid valve;

[0022] The air blowing mechanism comprises a rotating joint, which is fixedly connected to the supporting frame, a shunt pipe is fixedly connected to the rotating joint, the shunt pipe is fixedly connected to the hollow shaft of the hollow shaft motor, and the shunt pipe is connected to each shunt.

[0023] Optionally, the shunt pipe is connected to each shunt rack via a connecting hose.

[0024] Optionally, each fixed mold is fixedly connected to a contact switch, which is used to control the closing and opening of the corresponding solenoid valve. The contact switch also contacts the corresponding push plate so that when the discharging mechanism controls the discharging, the blowing action of the metal debris in the clamping space is synchronously controlled according to the action of the push plate.

[0025] Optionally, a scraping mechanism is also included, which is arranged between the sliding mold and the fixed mold, and is used to scrape metal debris on the sliding mold and the fixed mold, wherein:

[0026] The scraping mechanism includes a contact block, each fixed mold is provided with a contact block, each contact block is slidably connected to a moving block, the moving block contacts the corresponding sliding mold, and a plurality of balls are rotatably connected to the contact block and the moving block;

[0027] Two connecting springs are connected between the contact block and the corresponding moving block, so that the contact block and the corresponding moving block can be pressed outward to the inner wall of the corresponding clamping space;

[0028] The contact block and the moving block can be pushed according to the movement of the top frame.

[0029] Optionally, the contact block and the moving block are made of steel.

[0030] Optionally, a guide window is provided on the limiting frame, and the setting position of the guide window is consistent with the movement path of the mold clamping mechanism, wherein:

[0031] Two fixed blocks are also fixedly connected to the limiting frame, and the two fixed blocks are located on both sides of the guide window. A rotating roller is rotatably connected between the two fixed blocks, which is used for passing through the rotating roller and being pressed into the corresponding clamping mechanism during the process of the bar material following the driven disk from the feeding position to the cold heading position.

[0032] The beneficial effects of the present invention are as follows: 1. The bar stock will be conveyed to one of the fixed molds that is inclined upward. Since the sliding mold and the fixed mold are not tightly fitted, the bar stock can quickly slide into the fixed mold and make the bar stock contact with the top frame; the downward movement of the top frame will push the cold-forged bar stock to move downward, and the downward movement of the cold-forged bar stock will cause the cold-forged countersunk head to separate from the fixed mold. Since the other sliding mold is out of contact with the cold-forged bar stock, the cold-forged bar stock will move downward under the action of gravity, and then the cold-forged bar stock will separate from the fixed mold; this can reduce the friction between the bar stock and the sliding mold and the fixed mold when feeding and discharging the bar stock, thereby reducing the probability of the bar stock being strained during cold forging, thereby improving the cold forging quality of the bar stock.

[0033] 2. When the cold-forged bar is discharged, one of the push pieces or the movable piece will move downward and contact the contact switch that rotates to the bottom. When the switch contact is pressed, the solenoid valve of the same group will be opened, and the high-pressure gas will enter the diverter rack of the same group through the solenoid valve. The high-pressure gas will be blown out from the air outlet of the diverter rack. The blown-out high-pressure gas will blow out the metal debris generated by the bar processing in the sliding mold and the fixed mold, thereby reducing the accumulation of metal debris in the sliding mold and the fixed mold, keeping the inner surface of the sliding mold and the fixed mold clean, and making it difficult for the bar to be scratched by the accumulated metal debris during cold forging, thereby further improving the cold forging quality of the bar.

[0034] 3. The contact block, moving block and ball bearings move downward to scrape the inner walls of the sliding mold and the fixed mold. At the same time, one of the solenoid valves is opened, and high-pressure gas is blown out from an outlet hole of a diverter rack. The blown high-pressure gas cooperates with the contact block, moving block and ball bearings to scrape the inner walls of the sliding mold and the fixed mold, so that the residual metal debris inside the sliding mold and the fixed mold is cleaned, making the inside of the sliding mold and the fixed mold cleaner, and making the bar less likely to be scratched by the accumulated metal debris during cold heading, thereby further improving the cold heading quality of the bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0036] Figure 2 It is a partial cross-sectional three-dimensional structural schematic diagram of the present invention.

[0037] Figure 3 It is a schematic diagram of the partial three-dimensional structure of the mold clamping mechanism of the present invention.

[0038] Figure 4 It is a schematic diagram of the three-dimensional structure of the guide ring of the present invention.

[0039] Figure 5It is a partial three-dimensional structural schematic diagram of the mold clamping mechanism and the material discharging mechanism of the present invention.

[0040] Figure 6 It is a three-dimensional structural schematic diagram of the discharging mechanism of the present invention.

[0041] Figure 7 It is a partial three-dimensional structural schematic diagram of the discharging mechanism of the present invention.

[0042] Figure 8 It is a partial cross-sectional three-dimensional structural schematic diagram of the discharging mechanism of the present invention.

[0043] Fig. 9 It is a schematic diagram of the partial three-dimensional structure of the air blowing mechanism of the present invention.

[0044] Fig.10 It is a partial three-dimensional structural schematic diagram of the fixed mold and air blowing mechanism of the present invention.

[0045] Fig.11 It is a partial cross-sectional three-dimensional structural schematic diagram of the air blowing mechanism of the present invention.

[0046] Fig.12 It is a schematic diagram of the three-dimensional structure of the scraping mechanism of the present invention.

[0047] Fig.13 It is a schematic diagram of the partial three-dimensional structure of the scraping mechanism of the present invention.

[0048] Fig.14 It is a schematic diagram of a partial cross-sectional three-dimensional structure of the scraping mechanism of the present invention.

[0049] Figure numbers: 1_support frame, 2_limiting frame, 21_driven disk, 22_rotating disk, 3_hollow shaft motor, 4_mounting frame, 5_hydraulic rod, 6_cold heading head, 7_mold clamping mechanism, 71_fixed frame, 72_guide ring, 73_sliding mold, 74_guide rod, 75_fixed mold, 8_discharging mechanism, 81_top frame, 82_pushing plate, 83_moving plate, 84_pushing rod, 9_air blowing mechanism, 91_rotating joint, 92_diverter pipe, 93_connecting hose, 94_diverter frame, 95_solenoid valve, 96_contact switch, 10_scraping mechanism, 101_contact block, 102_moving block, 103_ball, 104_connecting spring, 111_fixed block, 112_rotating roller. DETAILED DESCRIPTION

[0050] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0051] Embodiment 1: A cold heading machine for countersunk bolt processing, such as Figure 1-Figure 8As shown, it includes a support frame 1, a limiting frame 2 is welded on the support frame 1, a driven disk 21 is rotatably connected to the limiting frame 2, a rotating disk 22 is rotatably connected to the limiting frame 2, the rotating disk 22 is connected to the driven disk 21 by bolts, a hollow shaft motor 3 is connected to the support frame 1 by bolts, the hollow shaft of the hollow shaft motor 3 is fixedly connected to the rotating disk 22, a cold heading mechanism is provided on the support frame 1, the cold heading mechanism is used for cold heading bar stock, a clamping mechanism 7 is provided on the driven disk 21 and the rotating disk 22, the clamping mechanism 7 is used for clamping the bar stock, a discharging mechanism 8 is provided on the driven disk 21, and the discharging mechanism 8 is used for pushing the bar stock.

[0052] The cold heading mechanism comprises a mounting frame 4, the mounting frame 4 is welded on the support frame 1, a hydraulic rod 5 is connected to the mounting frame 4 by bolts, a cold heading head 6 is fixedly connected to the telescopic rod of the hydraulic rod 5, and the cold heading head 6 is used for cold heading the bar material.

[0053] The clamping mechanism 7 includes a fixed frame 71, the fixed frame 71 is welded on the limiting frame 2, a guide ring 72 is welded on the fixed frame 71, a guide groove is opened on the guide ring 72, four sliding molds 73 are slidably connected to the rotating disk 22, each sliding mold 73 is welded with a guide rod 74, and the four guide rods 74 are in contact with the guide groove of the guide ring 72, and four fixed molds 75 are connected to the fixed rod on the driven disk 21. The four sliding molds 73 are respectively in contact with the four fixed molds 75, and each sliding mold 73 is respectively located on the side of the four fixed molds 75.

[0054] The four sliding molds 73 are respectively grouped with the fixed molds 75 on the four sliding molds 73 , and there are four groups of sliding molds 73 and fixed molds 75 in total.

[0055] The discharging mechanism 8 includes a top frame 81, and each fixed mold 75 is slidably connected to a top frame 81. There are four top frames 81 in total. The four top frames 81 are slidably connected to the driven disk 21. Two of the top frames 81 are respectively welded with a push piece 82, and the other two top frames 81 are respectively welded with a moving piece 83. A push rod 84 is welded to each sliding mold 73. Each of the four push rods is arranged in a staggered manner, and each push rod 84 is provided with a slide groove, wherein the slide grooves of two push rods 84 are respectively slidably connected to the two push pieces 82, and the slide grooves of the other two push rods 84 are respectively slidably connected to the two moving pieces 83.

[0056] The main functions of the push piece 82 and the moving piece 83 are the same. Unless otherwise specified, it can be understood that their related matching designs are universal and will not be elaborated in this article.

[0057] Initially, the bar material is conveyed into one of the upwardly inclined fixed molds 75 . Since the sliding mold 73 and the fixed mold 75 are not tightly fitted, the bar material can quickly slide into the fixed mold 75 and make contact with the top frame 81 .

[0058] Then the staff starts the hollow shaft motor 3 and the hydraulic rod 5, the hollow shaft of the hollow shaft motor 3 will rotate intermittently, the telescopic rod of the hydraulic rod 5 will intermittently drive the cold heading head 6 to move, and the hollow shaft of the hollow shaft motor 3 will rotate 90 degrees, which will drive the driven disk 21, the rotating disk 22, the sliding mold 73, the guide rod 74, the fixed mold 75, the top frame 81, the pushing plate 82, the moving plate 83 and the pushing rod 84 to rotate 90 degrees. When one of the fixed molds 75 rotates 90 degrees, it will drive the bar to rotate 90 degrees, so that the bar, the hydraulic rod 5 and the cold heading head 6 are in a straight line.

[0059] At the same time, one of the guide rods 74 will be squeezed by the guide groove of the guide ring 72 when it rotates, and one of the guide rods 74 will continue to rotate, which will cause one of the guide rods 74 to move toward the direction close to the driven disk 21, and the movement of one of the guide rods 74 will drive a sliding mold 73 to move toward the direction close to the driven disk 21, and the movement of one of the sliding molds 73 will drive the push rod 84 to move toward the direction close to the driven disk 21, and the movement of the push rod 84 will squeeze the push plate 82 or the moving plate 83 through the sliding groove and make the push plate 82 or the moving plate 83 move downward, and the downward movement of the push plate 82 or the moving plate 83 will drive a top frame 81 to move downward, and when one of the sliding molds 73 rotates to vertically upward, one of the sliding molds 73 no longer moves toward the direction close to the driven disk 21, and one of the sliding molds 73 moves toward the direction close to the driven disk 21 to contact the bar material and clamp it, and then the sliding mold 73 stops moving.

[0060] The rotation of the other guide rod 74 will be squeezed by the guide groove of the guide ring 72, causing the other guide rod 74 to move away from the driven disk 21. The movement of the other guide rod 74 will drive the other sliding mold 73 to move away from the driven disk 21. The movement of the other sliding mold 73 will drive the push rod 84 to move away from the driven disk 21. The movement of the push rod 84 will squeeze the push piece 82 or the moving piece 83 through the slide groove and reset the push piece 82 or the moving piece 83. The reset of the push piece 82 or the moving piece 83 will drive a top frame 81 to reset, so that the top frame 81 rotated to the feeding position is located at the bottom of the fixed mold 75, and then the hollow shaft motor 3 stops rotating. After the hollow shaft motor 3 stops rotating, the telescopic rod of the hydraulic rod 5 will drive the cold heading head 6 to move, and the movement of the cold heading head 6 will cold head the bar material.

[0061] After completing the cold heading of the bar, the telescopic rod of the hydraulic rod 5 will drive the cold heading head 6 to reset, and at the same time, a new bar will be transported to the fixed mold 75 rotated to the upper side, and then the hollow shaft of the hollow shaft motor 3 will continue to rotate 90 degrees. The hollow shaft of the hollow shaft motor 3 will continue to rotate 90 degrees, which will drive the driven disk 21, the rotating disk 22, the sliding mold 73, the guide rod 74, the fixed mold 75, the top frame 81, the push piece 82, the movable piece 83 and the push rod 84 to rotate 90 degrees. The rotation of the two fixed molds 75 will respectively drive a new bar and a cold-headed bar to rotate 90 degrees. The rotation of one of the guide rods 74 will be squeezed by the guide ring 72 and move toward the driven disk 21. The movement of one of the guide rods 74 will drive a sliding mold 73 and a push rod 84 to move toward the driven disk 21. The movement of the sliding mold 73 toward the driven disk 21 will clamp the new bar.

[0062] The rotation of the other guide rod 74 will be squeezed by the guide ring 72 and move away from the driven disk 21. The movement of the other guide rod 74 will drive the other sliding die 73 and the other push rod 84 to move away from the driven disk 21. The movement of the other sliding die 73 away from the driven disk 21 will no longer clamp the cold-headed bar. At the same time, the movement of one of the push rods 84 toward the driven disk 21 will squeeze the push plate 82 or the movable plate 83 to move downward. The downward movement of the push plate 82 or the movable plate 83 will drive a top frame 81 to move downward. When the cold-headed bar rotates to the bottom, the downward movement of the top frame 81 will push the cold-headed bar to move downward. The downward movement of the cold-headed bar will cause the cold-headed countersunk head to separate from the fixed die 75. Since the other sliding die 73 is out of contact with the cold-headed bar, the cold-headed bar will move downward under the action of gravity, and then the cold-headed bar will separate from the fixed die 75.

[0063] Another push rod 84 moves away from the driven disk 21 to squeeze the push plate 82 or the movable plate 83 to reset. The reset of the push plate 82 or the movable plate 83 will drive a top frame 81 to reset, and then the hollow shaft of the hollow shaft motor 3 stops rotating, and the telescopic rod of the hydraulic rod 5 will drive the cold heading head 6 to move. The movement of the cold heading head 6 will cold head the new bar material, and then repeat this process. When the bar material is fed and discharged, the sliding mold 73 is out of contact with the bar material, so that the friction between the bar material and the sliding mold 73 and the fixed mold 75 can be reduced during feeding and discharging, thereby reducing the probability of the bar material being strained during cold heading, thereby improving the cold heading quality of the bar material.

[0064] Embodiment 2: Based on embodiment 1, Figure 5-Figure 11As shown, it also includes an air blowing mechanism 9. The support frame 1 is provided with the air blowing mechanism 9, and the air blowing mechanism 9 is used to blow away metal debris. The air blowing mechanism 9 includes a rotating joint 91, and the supporting frame 1 is fixedly connected with the rotating joint 91. A shunt pipe 92 is welded on the rotating joint 91, and each shunt frame 94 is provided with an air outlet. The shunt pipe 92 is fixedly connected to the hollow shaft of the hollow shaft motor 3, and four connecting hoses 93 are fixedly connected to the shunt pipe 92. The connecting hose 93 can withstand high-pressure gas. The rotating joint 91, the shunt pipe 92 and the four connecting hoses 93 are connected. Each sliding mold 73 is welded with a shunt frame 94, and each shunt frame 94 is fixedly connected with a solenoid valve 95. The four solenoid valves 95 are respectively fixedly connected to the four connecting hoses 93. Each fixed mold 75 is connected with a contact switch 96 by bolts, and one of the contact switches 96 is in contact with the moving sheet 83.

[0065] The flow divider 94, the solenoid valve 95 and the contact switch 96 on each set of the sliding mold 73 and the fixed mold 75 form a group.

[0066] At first, high-pressure gas continuously enters the shunt pipe 92 and the connecting hose 93 through the rotating joint 91, and one of the contact switches 96 contacts a moving piece 83, so that the solenoid valve 95 of the same group is opened, and the high-pressure gas enters the shunt rack 94 of the same group through the solenoid valve 95 and is discharged from the exhaust hole 9 of the shunt rack. The rotation of the hollow shaft of the hollow shaft motor 3 will drive the shunt pipe 92 to rotate, and the rotation of the sliding mold 73 will drive the connecting hose 93, the shunt rack 94 and the solenoid valve 95 to rotate. The rotation of the fixed mold 75 will drive the contact switch 96 to rotate. At the same time, when the sliding mold 73 approaches or moves away from the driven disk 21, it will drive the connecting hose 93, the shunt rack 94 and the solenoid valve 95 to move. When one of the sliding molds 73 moves away from the driven disk 21, it will drive a moving piece 83 to move through the push rod 84. The movement of the moving piece 83 closes the solenoid valve 95 of the same group. When the cold-forged bar material is discharged, the sliding mold 73 and the fixed mold 75 below the rotation are no longer in close contact, so that the fixed mold 75 The air outlet of the diverter rack 94 is no longer blocked. When one of the push pieces 82 or the movable piece 83 moves downward, it will contact the contact switch 96 that rotates downward. When the switch contact is pressed, the solenoid valve 95 of the same group will be opened. After the solenoid valve 95 in the same group is opened, the high-pressure gas will enter the diverter rack 94 of the same group through the solenoid valve 95, and the high-pressure gas will be blown out from the air outlet of the diverter rack 94. The blown-out high-pressure gas will blow out the metal debris generated by the bar processing in the sliding mold 73 and the fixed mold 75, thereby reducing the accumulation of metal debris in the sliding mold 73 and the fixed mold 75, so that the inner surface of the sliding mold 73 and the fixed mold 75 remains clean, and the bar is not easily scratched by the accumulated metal debris during cold heading, thereby further improving the cold heading quality of the bar, and one of the push pieces 82 or the movable piece 83 is out of contact with the contact switch 96 that rotates downward, the solenoid valve 95 in the same group is closed, and no gas is blown out of the air outlet of the diverter rack 94, and then it goes back and forth.

[0067] Embodiment 3: Based on embodiment 2, Figure 12-14As shown, a scraping mechanism 10 is also included. The scraping mechanism 10 is provided between the sliding mold 73 and the fixed mold 75. The scraping mechanism 10 is used to scrape metal debris on the sliding mold 73 and the fixed mold 75. The scraping mechanism 10 includes a contact block 101. Each fixed mold 75 is provided with a contact block 101. The contact block 101 is in close contact with the inner wall of the fixed mold 75. There are four contact blocks 101 in total. Each contact block 101 is slidably connected to a moving block 102. The four moving blocks 102 are in contact with four sliding molds 73, respectively. The moving block 102 is in close contact with the inner wall of the sliding mold 73, each contact block 101 is rotatably connected to a plurality of balls 103, each moving block 102 is rotatably connected to a plurality of balls 103, four contact blocks 101 are respectively connected to the four moving blocks 102 with two connecting springs 104, one contact block 101, one moving block 102, a plurality of balls 103 and two connecting springs 104 form a group, and there are four groups of contact blocks 101, moving blocks 102, balls 103 and connecting springs 104 in total.

[0068] The contact block 101 and the moving block 102 are made of steel.

[0069] Initially, the connecting spring 104 is in a compressed state. When the bar is placed in the fixed mold 75, it will contact a group of contact blocks 101 and the moving block 102. The rotation of the sliding mold 73 and the fixed mold 75 will drive the four groups of contact blocks 101, the moving block 102, the ball 103 and the connecting spring 104 to rotate together; when the sliding mold 73 moves away from the driven disk 21, the sliding mold 73 will be out of contact with the moving block 102 and the ball 103 on the moving block 102, and the moving block 102 and the ball 103 on the moving block 102 will move upward driven by the two connecting springs 104; one group of contact blocks 101 01. When the moving block 102, the ball 103 and the connecting spring 104 rotate downward, the top frame 81 moves downward to push a group of contact blocks 101, the moving block 102, the ball 103 and the connecting spring 104 to move downward. The ball 103 moves downward to roll along the inner wall of the sliding mold 73 and the fixed mold 75. The contact block 101 and the moving block 102 move downward to push the cold-forged bar material to move downward. After the cold-forged bar material is separated from the fixed mold 75, the contact block 101, the moving block 102, the ball 103 and the connecting spring 104 move downward under the action of gravity. The contact block 101 01. The downward movement of the moving block 102 and the ball 103 will scrape the inner wall of the sliding mold 73 and the fixed mold 75. At the same time, one of the solenoid valves 95 is also opened, and high-pressure gas is blown out from the air outlet of a diverter frame 94. The blown high-pressure gas cooperates with the contact block 101, the moving block 102 and the ball 103 to scrape the inner wall of the sliding mold 73 and the fixed mold 75, so that the residual metal debris inside the sliding mold 73 and the fixed mold 75 is cleaned, thereby making the inside of the sliding mold 73 and the fixed mold 75 cleaner, thereby further improving the cold heading quality of the bar material. When one group of contact blocks 101, moving blocks 102, balls 103 and connecting springs 104 rotate upward, the contact blocks 101, moving blocks 102, balls 103 and connecting springs 104 are reset downward under the action of gravity, and then when the sliding mold 73 approaches the driven disk 21, the sliding mold 73 pushes the moving blocks 102 and the balls 103 on the moving blocks 102 to move, and the movement of the moving blocks 102 further compresses the two connecting springs 104, and the contact blocks 101 and the moving blocks 102 fit tightly together, and the sliding mold 73 contacts the contact blocks 101, and so on.

[0070] Embodiment 4: Based on the embodiment 3, Figure 1 As shown, a fixing block 111 is also included. Two fixing blocks 111 are welded on the limiting frame 2 , and a rotating roller 112 is rotatably connected between the two fixing blocks 111 .

[0071] The rotation of the sliding die 73 and the fixed die 75 will drive the bar to rotate, and the rotation of the bar will contact the rotating roller 112. The rotating roller 112 rotates so that the bottom of the bar is in close contact with the contact block 101 and the moving block 102, so that the bar is stably fixed before cold heading.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cold heading machine for countersunk bolt processing, characterized in that: It comprises a support frame (1), to which a limiting frame (2) is fixedly connected, wherein: A driven disk (21) and a rotating disk (22) are rotatably connected to the limiting frame (2), and the rotating disk (22) is fixedly connected to the driven disk (21); A hollow shaft motor (3) is also fixedly connected to the support frame (1), and the hollow shaft of the hollow shaft motor (3) is drivingly connected to the rotating disk (22); A cold heading mechanism is also provided on the support frame (1), and a clamping mechanism (7) is provided on the driven disk (21) and the rotating disk (22). A clamping space for clamping a bar material of a countersunk bolt is provided in the clamping mechanism (7), and the clamping space is provided along the diameter direction of the driven disk (21). The inlet and outlet of the clamping space are led out from the outer ring surface of the driven disk (21), and when the clamping mechanism (7) is rotated to the setting position of the cold heading mechanism, the corresponding clamping space and the cold heading mechanism can be aligned and matched; The driven disk (21) is also provided with a discharging mechanism (8), which is used to control the bar material clamped therein to be sent out when the inlet and outlet of the corresponding clamping space are moved downward.

2. A cold heading machine for countersunk bolt processing according to claim 1, characterized in that: The cold heading mechanism comprises a mounting frame (4), wherein the mounting frame (4) is fixedly connected to the support frame (1), a hydraulic rod (5) is fixedly connected to the mounting frame (4), a cold heading head (6) is fixedly connected to the telescopic rod of the hydraulic rod (5), and the telescopic direction of the telescopic rod of the hydraulic rod (5) points to the center of the driven disk (21).

3. A cold heading machine for countersunk bolt processing according to claim 2, characterized in that: The mold clamping mechanism (7) comprises a fixed mold (75) fixedly connected to the driven disk (21), and a sliding mold (73) slidably connected to the rotating disk (22), so as to form the clamping space between the fixed mold (75) and the sliding mold (73); The mold clamping mechanism (7) also includes a guide ring (72), which is fixedly connected to the limiting frame (2) through a fixing frame (71), and a guide groove is formed on the guide ring (72); A guide rod (74) is fixedly connected to the sliding die (73), and the guide rod (74) is in contact with the guide groove of the guide ring (72). When the sliding die (73) rotates following the rotating disk (22), the guide rod (74) reciprocates along the guide groove of the guide ring (72), driving the sliding die (73) to reciprocate in the direction of the fixed die (75), thereby controlling the clamping of the bar material.

4. A cold heading machine for countersunk bolt processing according to claim 3, characterized in that: Four pairs of sliding dies (73) and fixed dies (75) are provided and are evenly spaced along the circumference of the driven disk (21).

5. A cold heading machine for countersunk bolt processing according to claim 4, characterized in that: The discharging mechanism (8) includes a top frame (81), and each fixed mold (75) is slidably connected to a top frame (81), wherein: Four top frames (81) are slidably connected to the driven disk (21) and extend to the bottom of the corresponding clamping space; A push sheet (82) is fixedly connected to each of the two symmetrical top frames (81), a push rod (84) is fixedly connected to each sliding mold (73), each push rod (84) is provided with a slide groove, and the slide grooves of the two symmetrical push rods (84) are slidably connected to the corresponding two push sheets (82); When the sliding mold (73) moves along the axial direction of the driven disk (21), the driving rod (84) moves synchronously. Through the transmission of the driving rod (84) and the driving plate (82), the axial force is converted into a radial force, driving the top frame (81) to move along the axial direction of the corresponding fixed mold (75), thereby pushing the bar material at the bottom of the corresponding clamping space to be discharged.

6. A cold heading machine for countersunk bolt processing according to claim 5, characterized in that: It also includes an air blowing mechanism (9), which is arranged on the support frame (1) and is used to blow away metal debris, wherein: Each set of sliding molds (73) and fixed molds (75) is also provided with a flow distribution frame (94), each flow distribution frame (94) is provided with an air outlet hole connected to the corresponding clamping space, and each flow distribution frame (94) is fixedly connected with a solenoid valve (95); The air blowing mechanism (9) comprises a rotating joint (91), the rotating joint (91) is fixedly connected to the support frame (1), a flow dividing pipe (92) is fixedly connected to the rotating joint (91), the flow dividing pipe (92) is fixedly connected to the hollow shaft of the hollow shaft motor (3), and the flow dividing pipe (92) is connected to each flow dividing frame (94).

7. A cold heading machine for countersunk bolt processing according to claim 6, characterized in that: The flow distribution pipe (92) is connected to each flow distribution frame (94) through a connecting hose (93).

8. A cold heading machine for countersunk bolt processing according to claim 6, characterized in that: Each fixed mold (75) is fixedly connected to a contact switch (96), which is used to control the closing and opening of the corresponding solenoid valve (95). The contact switch (96) is also in contact with the corresponding push plate (82) so that when the discharge mechanism (8) controls the discharge, the metal debris in the clamping space is blown away synchronously according to the action of the push plate (82).

9. A cold heading machine for countersunk bolt processing according to claim 6, characterized in that: The invention also includes a scraping mechanism (10), which is arranged between the sliding mold (73) and the fixed mold (75), and is used to scrape metal debris on the sliding mold (73) and the fixed mold (75), wherein: The scraping mechanism (10) comprises a contact block (101), each fixed mold (75) is provided with a contact block (101), each contact block (101) is slidably connected to a moving block (102), the moving block (102) is in contact with the corresponding sliding mold (73), and a plurality of balls (103) are rotatably connected to the contact block (101) and the moving block (102); Two connecting springs (104) are connected between the contact block (101) and the corresponding moving block (102), so that the contact block (101) and the corresponding moving block (102) can be pressed outward to the inner wall of the corresponding clamping space; The contact block (101) and the moving block (102) can be pushed according to the movement of the top frame (81).

10. A cold heading machine for countersunk bolt processing according to claim 1, characterized in that: A guide window is also provided on the limiting frame (2), and the setting position of the guide window is consistent with the movement path of the mold clamping mechanism (7), wherein: Two fixed blocks (111) are also fixedly connected to the limiting frame (2), and the two fixed blocks (111) are located on both sides of the guide window. A rotating roller (112) is rotatably connected between the two fixed blocks (111), and is used for passing through the rotating roller (112) and being pressed into the corresponding clamping mechanism (7) by the rotating roller (112) during the process of the bar material following the driven disk (21) from the feeding position to the cold heading processing position.

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