A cold header for processing countersunk head bolts

Abstract

The application relates to the field of mechanical processing, in particular to a cold header for processing countersunk head bolts, 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. Since the sliding die and the fixed die are not tightly combined, the bar material can quickly slide into the fixed die; since the sliding die is separated from the cold-homed bar material, the cold-homed bar material can move downwards under the action of gravity; the bar material can reduce the friction between the bar material and the sliding die and the fixed die when feeding and discharging, thereby reducing the probability of the bar material being pulled when cold-homing, so that the cold-homing quality of the bar material is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mechanical processing, in particular to a cold header for processing countersunk head bolts. BACKGROUND

[0002] The cold header is mainly used for punching, which is based on the metal plastic deformation theory and applies a certain pressure to the metal blank at room temperature to make it plastic deformation in the mold cavity according to the specified shape and size. It is generally used for fastener processing. The rod is cold headed into a bolt by the cold header.

[0003] The existing cold header is used to process the rod. The rod is pushed into the mold by the cold header. Since the hole size of the mold is roughly the same as the size of the rod, a large force is required to push the rod into place. When the cold-headed rod is pushed out of the mold, the rod will be in close contact with the inner wall of the mold and will rub, which will easily cause scratches on the surface of the rod. The rod will produce some metal debris after cold heading deformation. After several times of cold heading, the residual metal debris accumulates in the mold, which will also cause scratches on the rod, thereby reducing the quality of the cold heading of the rod. SUMMARY

[0004] In order to overcome the shortcomings of the existing equipment that the rod is easily scratched during feeding and discharging, and the metal debris accumulated in the mold also causes scratches on the rod, thereby reducing the quality of the cold heading of the rod, the present application provides a cold header for processing countersunk head bolts, which can reduce the friction during feeding and discharging of the rod, and clean the metal debris, thereby improving the quality of the rod.

[0005] The technical solution is as follows: a cold header for processing countersunk head bolts, comprising a support frame, a limiting frame is fixedly connected to the support frame, wherein,

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

[0007] A hollow shaft motor is also fixedly connected to the support frame, and the hollow shaft of the hollow shaft motor is in transmission connection with the rotating disc;

[0008] The support frame is also provided with a cold heading mechanism, and the driven disc and the rotating disc are provided with a mold closing mechanism. The mold closing mechanism is provided with a clamping space for clamping the rod of the countersunk head bolt. The clamping space is arranged along the diameter direction of the driven disc. The inlet and outlet of the clamping space are led out from the outer ring surface of the driven disc. When the mold closing mechanism is rotated to the position of the cold heading mechanism, the corresponding clamping space is matched with the cold heading mechanism.

[0009] The driven disc is further provided with a discharging mechanism, which is used to control the bar in the corresponding clamping space to be discharged when the inlet and outlet of the corresponding clamping space move downward.

[0010] Optionally, the cold heading mechanism comprises 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 rod of the hydraulic rod is directed to the center of the driven disc.

[0011] Optionally,

[0012] The die assembly mechanism comprises fixed dies fixedly connected to the driven disc and sliding dies slidingly connected to the rotating disc to form the clamping space between the fixed dies and the sliding dies;

[0013] The die assembly mechanism further comprises a guide ring fixedly connected to the limiting frame through a fixing frame, and the guide ring is provided with a guide groove;

[0014] A guide rod is fixedly connected to each sliding die, and the guide rod is in contact with the guide groove of the guide ring, so that when the sliding die rotates with the rotating disc, the guide rod reciprocates along the guide groove of the guide ring, driving the sliding die to reciprocate towards the fixed die, thereby controlling the clamping of the bar.

[0015] Optionally, the sliding dies and the fixed dies are provided in four pairs and are uniformly and spacedly arranged along the circumference of the driven disc.

[0016] Optionally, the discharging mechanism comprises a top frame, and each fixed die is slidingly connected with a top frame, wherein,

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

[0018] Two pushers are fixedly connected to the two top frames respectively, a push rod is fixedly connected to each sliding die, a sliding groove is formed in each push rod, and the sliding grooves of the two push rods are slidingly connected with the two pushers respectively.

[0019] When the sliding die moves along the axial direction of the driven disc, the push rod moves synchronously, the axial force is converted into a radial force through the transmission of the push rod and the pusher, the top frame moves along the axial direction of the corresponding fixed die, and the bar at the bottom of the corresponding clamping space can be pushed out.

[0020] Optionally, the device further comprises a gas blowing mechanism arranged on the support frame, and the gas blowing mechanism is used to blow away metal scraps.

[0021] Each of the sliding dies and the fixed dies is further provided with a shunt frame, each of the shunt frames is provided with a gas outlet hole communicated to the corresponding clamping space, and each of the shunt frames is fixedly connected with an electromagnetic valve.

[0022] The air blowing mechanism comprises a rotary joint fixedly connected to the support frame, a shunt pipe fixedly connected to the rotary joint, and a hollow shaft of the hollow shaft motor, the shunt pipe being communicated to each shunt.

[0023] Optionally, the shunt pipe is communicated to each shunt frame through a connecting hose.

[0024] Optionally, each of the fixed dies is fixedly connected with a contact switch for controlling the closing and opening of the corresponding electromagnetic valve, and the contact switch is in contact with the corresponding push piece to synchronously control the blowing action of the metal scraps in the clamping space according to the action of the push piece when the discharging mechanism controls the discharging.

[0025] Optionally, the device further comprises a scraping mechanism arranged between the sliding dies and the fixed dies, the scraping mechanism being used for scraping the metal scraps on the sliding dies and the fixed dies, wherein,

[0026] The scraping mechanism comprises a contact block, each of the fixed dies is provided with the contact block, each of the contact blocks is slidably connected with a moving block, the moving block is in contact with the corresponding sliding die, and a plurality of rolling 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 to enable the contact block and the corresponding moving block to be pressed outwardly 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 material of the contact block and the moving block is steel.

[0030] Optionally, the limiting frame is further provided with a guide window, the setting position of the guide window is consistent with the movement path of the die closing mechanism, wherein,

[0031] The limiting frame is further fixedly connected with two fixed blocks, the two fixed blocks are located on the two sides of the guide window, and a rotating roller is rotatably connected between the two fixed blocks, so that the bar can pass through the rotating roller and be pressed in the corresponding die closing mechanism during the process that the bar is transferred from the feeding position to the cold heading processing position by the driven disc.

[0032] The beneficial effects of the present application are: 1. The bar material is conveyed into one of the upwardly inclined fixed molds. Since the sliding mold and the fixed mold are not tightly fitted, the bar material can quickly slide into the fixed mold and make contact with the top frame. The downward movement of the top frame pushes the cold-headed bar material downward. The downward movement of the cold-headed bar material causes the cold-headed countersunk head to disengage from the fixed mold. Since the other sliding mold disengages from the cold-headed bar material, the cold-headed bar material moves downward under the action of gravity, and then the cold-headed bar material disengages from the fixed mold. This allows the bar material to reduce friction with the sliding mold and the fixed mold when feeding and discharging, thereby reducing the probability of bar material being damaged during cold heading, thereby improving the cold heading quality of the bar material.

[0033] 2. When the cold-headed bar material is discharged, one of the pushers or moving pieces moves downward and contacts the contact switch rotated to the lower side. When the switch contact is pressed, the same group of electromagnetic valves is opened. High-pressure gas enters the same group of shunt frames through the electromagnetic valves. The high-pressure gas is blown out from the gas outlet holes of the shunt frames. The blowing of high-pressure gas blows out the metal chips generated by the bar material processing in the sliding mold and the fixed mold, thereby reducing the accumulation of metal chips in the sliding mold and the fixed mold, keeping the inner surface of the sliding mold and the fixed mold clean, thereby preventing the bar material from being scratched by the accumulated metal chips during cold heading, thereby further improving the cold heading quality of the bar material.

[0034] 3. The downward movement of the contact block, the moving block and the ball bearings scrapes the inner wall of the sliding mold and the fixed mold. At the same time, one of the electromagnetic valves is also opened. High-pressure gas is blown out from the gas outlet hole of one shunt frame. The blown high-pressure gas cooperates with the scraping of the inner wall of the sliding mold and the fixed mold by the contact block, the moving block and the ball bearings, so that the residual metal chips in the sliding mold and the fixed mold are cleaned, thereby making the inside of the sliding mold and the fixed mold cleaner, thereby preventing the bar material from being scratched by the accumulated metal chips during cold heading, thereby further improving the cold heading quality of the bar material. BRIEF DESCRIPTION OF DRAWINGS

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

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

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

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

[0039] Figure 5It is a partial perspective view of the die closing mechanism and the discharging mechanism of the application.

[0040] Figure 6 It is a perspective view of the discharging mechanism of the application.

[0041] Figure 7 It is a partial perspective view of the discharging mechanism of the application.

[0042] Figure 8 It is a partial sectional perspective view of the discharging mechanism of the application.

[0043] Figure 9 It is a partial perspective view of the air blowing mechanism of the application.

[0044] Figure 10 It is a partial perspective view of the die closing mechanism and the air blowing mechanism of the application.

[0045] Figure 11 It is a partial sectional perspective view of the air blowing mechanism of the application.

[0046] Figure 12 It is a perspective view of the scraping mechanism of the application.

[0047] Figure 13 It is a partial perspective view of the scraping mechanism of the application.

[0048] Figure 14 It is a partial sectional perspective view of the scraping mechanism of the application.

[0049] Reference numerals: 1 support frame, 2 limiting frame, 21 driven disc, 22 rotating disc, 3 hollow shaft motor, 4 mounting frame, 5 hydraulic rod, 6 cold heading head, 7 die closing mechanism, 71 fixed frame, 72 guide ring, 73 sliding die, 74 guide rod, 75 fixed die, 8 discharging mechanism, 81 top frame, 82 pushing piece, 83 moving piece, 84 pushing rod, 9 air blowing mechanism, 91 rotating joint, 92 shunt pipe, 93 connecting hose, 94 shunt frame, 95 electromagnetic 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 application will be described in detail below with reference to the accompanying drawings.

[0051] Example 1: A cold heading machine for processing countersunk head bolts, as shown in Figures 1-8As shown, including support frame 1, support frame 1 on the welding limit frame 2, limit frame 2 on the rotating connection from the driven disc 21, limit frame 2 on the rotating disc 22 is rotatably connected, rotating disc 22 and driven disc 21 through bolt connection, support frame 1 on the hollow shaft motor 3 is connected by bolt, hollow shaft motor 3 hollow shaft and rotating disc 22 fixed connection, support frame 1 is equipped with cold header mechanism, cold header mechanism for cold header bar, driven disc 21 and rotating disc 22 is equipped with die mechanism 7, die mechanism 7 for clamping bar, driven disc 21 is equipped with discharge mechanism 8, discharge mechanism 8 for pushing bar.

[0052] Cold header mechanism includes mounting bracket 4, support frame 1 on the welding mounting bracket 4, mounting bracket 4 on the bolt connection of hydraulic rod 5, the telescopic rod of hydraulic rod 5 is fixedly connected with cold header 6, cold header 6 for bar cold header.

[0053] Die mechanism 7 includes fixed frame 71, limit frame 2 on the welding fixed frame 71, fixed frame 71 on the welding guide ring 72, guide ring 72 on the guide groove, rotating disc 22 on the sliding connection of four sliding dies 73, each sliding die 73 is welded with a guide rod 74, four guide rods 74 are in contact with the guide groove of guide ring 72, driven disc 21 on the fixed rod connection of four fixed dies 75, four sliding dies 73 are respectively in contact with four fixed dies 75, each sliding die 73 is respectively located in the side of four fixed dies 75.

[0054] Four sliding dies 73 are respectively in contact with the fixed die 75 on the four sliding dies 73, and the sliding die 73 and the fixed die 75 have four groups.

[0055] Discharge mechanism 8 includes top frame 81, each fixed die 75 is slidably connected with a top frame 81, top frame 81 has four, four top frame 81 is slidably connected with driven disc 21, two top frame 81 is respectively welded with a push piece 82, the other two top frame 81 is respectively welded with a moving piece 83, each sliding die 73 is welded with a push rod 84, four each push rod is staggered, each push rod 84 is provided with a sliding groove, the sliding groove of two push rods 84 is slidably connected with two push pieces 82, respectively, the sliding groove of the other two push rods 84 is slidably connected with two moving pieces 83.

[0056] The main function of push piece 82 and moving piece 83 is the same, without special description, it can be understood that the related matching design can be universal, this article does not repeat here.

[0057] At first, the bar will be transported into one of the upwardly inclined fixed dies 75, because the sliding die 73 and the fixed die 75 are not closely fitted, the bar can quickly slide into the fixed die 75 and make the bar contact 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 header 6 to move, the hollow shaft of the hollow shaft motor 3 rotates 90 degrees, which drives the driven disc 21, the rotating disc 22, the sliding die 73, the guide rod 74, the fixed die 75, the top frame 81, the pushing piece 82, the moving piece 83 and the pushing rod 84 to rotate 90 degrees, and one of the fixed dies 75 rotates 90 degrees, which drives the bar to rotate 90 degrees, so that the bar is in a straight line with the hydraulic rod 5 and the cold header 6.

[0059] At the same time, the rotation of one of the guide rods 74 is pressed by the guide groove of the guide ring 72, and the continuous rotation of one of the guide rods 74 makes one of the guide rods 74 move towards the direction close to the driven disc 21, the movement of one of the guide rods 74 drives one of the sliding dies 73 to move towards the direction close to the driven disc 21, the movement of one of the sliding dies 73 drives the pushing rod 84 to move towards the direction close to the driven disc 21, the movement of the pushing rod 84 presses the pushing piece 82 or the moving piece 83 through the sliding groove and makes the pushing piece 82 or the moving piece 83 move downward, the downward movement of the pushing piece 82 or the moving piece 83 drives one of the top frames 81 to move downward, and when one of the sliding dies 73 rotates vertically upward, one of the sliding dies 73 no longer moves towards the direction close to the driven disc 21, and the movement of one of the sliding dies 73 towards the direction close to the driven disc 21 contacts the bar and clamps it, and then the sliding die 73 stops moving.

[0060] The rotation of the other guide rod 74 is pressed by the guide groove of the guide ring 72, which makes the other guide rod 74 move away from the driven disc 21, the movement of the other guide rod 74 drives the other sliding die 73 to move away from the driven disc 21, the movement of the other sliding die 73 drives the pushing rod 84 to move away from the driven disc 21, the movement of the pushing rod 84 presses the pushing piece 82 or the moving piece 83 through the sliding groove and resets the pushing piece 82 or the moving piece 83, the resetting of the pushing piece 82 or the moving piece 83 drives one of the top frames 81 to reset, so that the top frame 81 rotated to the feeding position is located at the bottom end of the fixed die 75, then the hollow shaft motor 3 stops rotating, and after the hollow shaft motor 3 stops rotating, the telescopic rod of the hydraulic rod 5 drives the cold header 6 to move, and the movement of the cold header 6 cold headers the bar.

[0061] After 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 into the fixed die 75 which is rotated to the upper oblique position. Then the hollow shaft of the hollow shaft motor 3 continues to rotate 90 degrees, which will drive the driven disc 21, the rotating disc 22, the sliding die 73, the guide rod 74, the fixed die 75, the top frame 81, the pushing piece 82, the moving piece 83 and the pushing rod 84 to rotate 90 degrees. The rotation of the two fixed dies 75 will drive a new bar and a cold headed bar to rotate 90 degrees respectively. The rotation of one guide rod 74 will be pressed by the guide ring 72 and move towards the direction close to the driven disc 21. The movement of one guide rod 74 will drive one sliding die 73 and one pushing rod 84 to move towards the direction close to the driven disc 21. The movement of the sliding die 73 towards the direction close to the driven disc 21 will clamp the new bar.

[0062] The rotation of the other guide rod 74 will be pressed by the guide ring 72 and move away from the direction of the driven disc 21. The movement of the other guide rod 74 will drive the other sliding die 73 and the other pushing rod 84 to move away from the direction of the driven disc 21. The movement of the other sliding die 73 away from the direction of the driven disc 21 will no longer clamp the cold headed bar. At the same time, the movement of one pushing rod 84 towards the direction close to the driven disc 21 will press the pushing piece 82 or the moving piece 83 to move downwards. The movement of the pushing piece 82 or the moving piece 83 downwards will drive one top frame 81 to move downwards. When the cold headed bar rotates to the lower position, the movement of the top frame 81 downwards will push the cold headed bar to move downwards. The movement of the cold headed bar downwards will make the cold headed barrel head separate from the fixed die 75. Since the other sliding die 73 is separated from the cold headed bar, the cold headed bar will move downwards under the action of gravity. Then the cold headed bar is separated from the fixed die 75.

[0063] The movement of the other pushing rod 84 away from the direction of the driven disc 21 will press the pushing piece 82 or the moving piece 83 to reset. The resetting of the pushing piece 82 or the moving piece 83 will drive one top frame 81 to reset. Then the hollow shaft of the hollow shaft motor 3 stops rotating. 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. Then the process is repeated. Since the sliding die 73 is separated from the bar during feeding and discharging, the bar can reduce the friction between the bar and the sliding die 73 and the fixed die 75 during feeding and discharging, thereby reducing the probability of bar damage during cold heading, thereby improving the cold heading quality of the bar.

[0064] Example 2: Based on Example 1, as Figures 5-11As shown, the air blowing mechanism 9 is arranged on the support frame 1, and is used for blowing away metal scraps. The air blowing mechanism 9 comprises a rotating joint 91 fixedly connected to the support frame 1, a shunt pipe 92 welded to the rotating joint 91, a gas outlet hole arranged on each shunt frame 94, the shunt pipe 92 fixedly connected to the hollow shaft of the hollow shaft motor 3, four connecting hoses 93 fixedly connected to the shunt pipe 92, the rotating joint 91, the shunt pipe 92 and the four connecting hoses 93 in communication, the shunt frame 94 welded to each sliding mold 73, the electromagnetic valve 95 fixedly connected to each shunt frame 94, the four electromagnetic valves 95 respectively fixedly connected to the four connecting hoses 93, and the contact switch 96 bolted to each fixed mold 75, wherein one of the contact switches 96 is in contact with the moving piece 83.

[0065] The shunt frame 94, the electromagnetic valve 95 and the contact switch 96 on each group of sliding molds 73 and fixed molds 75 form a group.

[0066] At the beginning, high pressure gas enters into the shunt pipe 92 and the connecting hose 93 through the rotary joint 91, one of the contact switches 96 contacts one of the moving pieces 83, so that the electromagnetic valve 95 of the same group is opened, the high pressure gas enters into the shunt frame 94 of the same group through the electromagnetic valve 95 and is discharged from the exhaust hole 9 of the shunt frame, the hollow shaft of the hollow shaft motor 3 rotates to drive the shunt pipe 92 to rotate, the sliding die 73 rotates to drive the connecting hose 93, the shunt frame 94 and the electromagnetic valve 95 to rotate, the fixed die 75 rotates to drive the contact switch 96 to rotate, and when the sliding die 73 approaches or moves away from the driven disc 21, the connecting hose 93, the shunt frame 94 and the electromagnetic valve 95 move, one of the sliding dies 73 moves away from the driven disc 21 to drive one of the moving pieces 83 to move through the push rod 84, and the moving piece 83 moves to make the electromagnetic valve 95 of the same group closed; when the good bar material is discharged, the lower sliding die 73 and the fixed die 75 are not in close contact, so that the fixed die 75 no longer blocks the exhaust hole of the shunt frame 94, one of the push pieces 82 or the moving pieces 83 moves downward to contact the contact switch 96 rotated to the lower side, and the switch contact is pressed to open the electromagnetic valve 95 of the same group, after the electromagnetic valve 95 of the same group is opened, the high pressure gas enters into the shunt frame 94 of the same group through the electromagnetic valve 95, the high pressure gas is blown out from the exhaust hole of the shunt frame 94, the high pressure gas blows out the metal scraps generated by the bar material in the sliding die 73 and the fixed die 75, so as to reduce the accumulation of metal scraps in the sliding die 73 and the fixed die 75, so as to keep the inner surface of the sliding die 73 and the fixed die 75 clean, so as to prevent the bar material from being scratched by the accumulated metal scraps during cold heading, thereby further improving the cold heading quality of the bar material, one of the push pieces 82 or the moving pieces 83 is separated from the contact switch 96 rotated to the lower side, the electromagnetic valve 95 of the same group is closed, and the exhaust hole of the shunt frame 94 is no longer blown out, and then the process is repeated.

[0067] Example 3: on the basis of example 2, as Figures 12-14As shown, the device further comprises a scraping mechanism 10 arranged between the sliding mold 73 and the fixed mold 75, the scraping mechanism 10 being used to scrape metal scraps on the sliding mold 73 and the fixed mold 75, the scraping mechanism 10 comprising contact blocks 101, each of the contact blocks 101 being arranged on each of the fixed molds 75 and being in close contact with the inner wall of the fixed mold 75, the four contact blocks 101 being in close contact with the inner wall of the fixed mold 75, each of the contact blocks 101 being slidably connected with a moving block 102, the four moving blocks 102 being in contact with the four sliding molds 73, the moving block 102 being in close contact with the inner wall of the sliding mold 73, each of the contact blocks 101 being rotatably connected with a plurality of rolling balls 103, each of the moving blocks 102 being rotatably connected with a plurality of rolling balls 103, two connecting springs 104 being connected between each of the contact blocks 101 and each of the moving blocks 102, one contact block 101, one moving block 102, a plurality of rolling balls 103 and two connecting springs 104 forming a group, the contact block 101, the moving block 102, the rolling ball 103 and the connecting spring 104 forming four groups in total.

[0068] The material of the contact block 101 and the moving block 102 is steel.

[0069] At the beginning, the connecting spring 104 is in the compressed state, the bar placed in the fixed mold 75 will contact with a group of contact blocks 101 and moving blocks 102, the rotation of the sliding mold 73 and the fixed mold 75 will drive the four groups of contact blocks 101, moving blocks 102, balls 103 and connecting springs 104 to rotate; when the sliding mold 73 moves away from the driven disc 21, the sliding mold 73 will be out of contact with the moving blocks 102 and the balls 103 on the moving blocks 102, the moving blocks 102 and the balls 103 on the moving blocks 102 will move upward under the drive of the two connecting springs 104; when one of the groups of contact blocks 101, moving blocks 102, balls 103 and connecting springs 104 rotates to the lower side, the downward movement of the top frame 81 will push the group of contact blocks 101, moving blocks 102, balls 103 and connecting springs 104 to move downward, the downward movement of the balls 103 will roll along the inner wall of the sliding mold 73 and the fixed mold 75, the downward movement of the contact blocks 101 and the moving blocks 102 will push the cold upset bar to move downward, after the cold upset bar is separated from the fixed mold 75, the contact blocks 101, moving blocks 102, balls 103 and connecting springs 104 will move downward under the action of gravity, the downward movement of the contact blocks 101, moving blocks 102 and balls 103 will scrape the inner wall of the sliding mold 73 and the fixed mold 75, at the same time, one of the electromagnetic valves 95 is also opened, the high-pressure gas will be blown out from the gas outlet of one of the shunt frames 94, the blown high-pressure gas will cooperate with the scraping of the contact blocks 101, moving blocks 102 and balls 103 on the inner wall of the sliding mold 73 and the fixed mold 75, so as to clean the residual metal debris in the sliding mold 73 and the fixed mold 75, thereby making the inner wall of the sliding mold 73 and the fixed mold 75 cleaner, so as to further improve the cold upsetting quality of the bar; when one of the groups of contact blocks 101, moving blocks 102, balls 103 and connecting springs 104 rotates to the upper side, the contact blocks 101, moving blocks 102, balls 103 and connecting springs 104 will reset downward under the action of gravity, then when the sliding mold 73 approaches the driven disc 21, the sliding mold 73 will push the moving blocks 102 and the balls 103 on the moving blocks 102 to move, the movement of the moving blocks 102 will further compress the two connecting springs 104, the contact blocks 101 and the moving blocks 102 will tightly adhere to each other, the sliding mold 73 will contact with the contact blocks 101, and so on.

[0070] Example 4: on the basis of example 3, as shown in Figure 1 two fixed blocks 111 are welded on the limiting frame 2, and a rotating roller 112 is rotatably connected between the two fixed blocks 111.

[0071] The rotation of the sliding die 73 and the fixed die 75 drives the rotation of the bar, and the rotation of the bar contacts the rotating roller 112, which rotates to make the bottom of the bar tightly contact 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 the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cold heading machine for processing countersunk bolts, characterized in that, It includes a support frame (1), and a limiting frame (2) is fixedly connected to the support frame (1), wherein, The limiting frame (2) is rotatably connected to a driven disk (21) and a rotating disk (22), 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 connected to the rotating disk (22) for transmission. The support frame (1) is also provided with a cold heading mechanism. The driven plate (21) and the rotating plate (22) are provided with a mold closing mechanism (7). The mold closing mechanism (7) is provided with a clamping space for clamping the bar stock of the countersunk bolt. The clamping space is arranged along the diameter direction of the driven plate (21). The inlet and outlet of the clamping space are led out from the outer ring surface of the driven plate (21). When the mold closing mechanism (7) is rotated to the position of the cold heading mechanism, the corresponding clamping space is aligned and matched with the cold heading mechanism. The driven plate (21) is also provided with a discharge mechanism (8), which is used to control the bar material clamped therein to be discharged when the inlet and outlet of the corresponding clamping space moves to the downward position; The clamping mechanism (7) includes a fixed mold (75) fixedly connected to the driven disk (21) and a sliding mold (73) slidably connected to the rotating disk (22) to form the clamping space between the fixed mold (75) and the sliding mold (73); The mold closing mechanism (7) also includes a guide ring (72), which is fixedly connected to the limiting frame (2) by a fixing frame (71), and the guide ring (72) has a guide groove. A guide rod (74) is fixedly connected to the sliding mold (73). The guide rod (74) contacts the guide groove of the guide ring (72). When the sliding mold (73) rotates with the rotating disk (22), its guide rod (74) moves back and forth along the guide groove of the guide ring (72), driving the sliding mold (73) to move back and forth in the direction of the fixed mold (75) to control the clamping of the bar stock. Four pairs of sliding molds (73) and fixed molds (75) are provided and are evenly spaced along the circumference of the driven disk (21); The discharge mechanism (8) includes a top frame (81), and each fixed mold (75) is slidably connected to a top frame (81), wherein, Four top brackets (81) are slidably connected to the driven plate (21) and extend to the bottom of the corresponding clamping space; A push plate (82) is fixedly connected to each of the two symmetrical top frames (81), and a push rod (84) is fixedly connected to each sliding mold (73). Each push rod (84) has a groove, and the grooves of the two symmetrical push rods (84) are slidably connected to the corresponding two push plates (82). When the sliding mold (73) moves along the axial direction of the driven plate (21), it drives the push rod (84) to move synchronously. Through the transmission of the push rod (84) and the push plate (82), the axial force of the sliding mold (73) is converted into a radial force, which drives the top frame (81) to move radially along the corresponding fixed mold (75), thereby pushing the bar material at the bottom of the corresponding clamping space to be discharged. This includes a scraping mechanism (10) disposed between the sliding mold (73) and the fixed mold (75). The scraping mechanism (10) is used to scrape metal debris from the sliding mold (73) and the fixed mold (75). The scraping mechanism (10) includes a contact block (101), and a contact block (101) is placed on each fixed mold (75). A movable block (102) is slidably connected to each contact block (101). The movable block (102) contacts the corresponding sliding mold (73). Several balls (103) are rotatably connected to both the contact block (101) and the movable 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 against 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).

2. The cold heading machine for countersunk bolt processing according to claim 1, characterized in that, The cold heading mechanism includes 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 rod of the hydraulic rod (5) extends in the direction of the extension and retraction of the extension and retraction of the extension and retraction of the extension and retraction rod points to the center of the driven plate (21).

3. A cold heading machine for countersunk bolt processing according to claim 2, characterized in that, It also includes an air blowing mechanism (9), which is mounted on the support frame (1). The air blowing mechanism (9) is used to blow away metal debris. Each set of sliding mold (73) and fixed mold (75) is also provided with a flow divider (94), each flow divider (94) has an air outlet that connects to the corresponding clamping space, and each flow divider (94) is fixedly connected with a solenoid valve (95). The air blowing mechanism (9) includes a rotating joint (91), which is fixedly connected to the support frame (1). A diverter pipe (92) is fixedly connected to the rotating joint (91). The diverter pipe (92) is fixedly connected to the hollow shaft of the hollow shaft motor (3). The diverter pipe (92) is connected to each diverter frame (94).

4. A cold heading machine for countersunk bolt processing according to claim 3, characterized in that, The shunt pipe (92) is connected to each shunt rack (94) via a connecting hose (93).

5. A cold heading machine for countersunk bolt processing according to claim 3, characterized in that, Each fixed mold (75) is fixedly connected to a contact switch (96). The contact switch (96) is used to control the closing and opening of the corresponding solenoid valve (95). The contact switch (96) also contacts the corresponding push plate (82) so that when the discharge mechanism (8) controls the discharge, the action of blowing away metal debris in the clamping space is synchronously controlled according to the action of the push plate (82).

6. A cold heading machine for countersunk bolt processing according to claim 1, characterized in that, The limiting frame (2) is also provided with a guide window, the position of which is consistent with the movement path of the mold closing mechanism (7). Two fixing blocks (111) are also fixedly connected to the limiting frame (2). The two fixing blocks (111) are located on both sides of the guide window. A rotating roller (112) is rotatably connected between the two fixing blocks (111). During the process of the bar stock following the driven plate (21) from the feeding position to the cold heading position, it can pass through the rotating roller (112) and be pressed into the corresponding mold closing mechanism (7) by the rotating roller (112).

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