A double-cooling type bolt forming die

Abstract

The present invention discloses a double-cooling type bolt forming die in the technical field of bolt forming, including a machine body. A placement groove for placing a metal rod is opened at the top of the machine body. Punching rods are slidably connected to both the left and right sides above the machine body. Forming ends are arranged on the punching rods. A hoop member is arranged above the placement groove, and a first cylinder is fixedly connected to the top of the hoop member; in the present invention, during the process of the forming die separating from the rod, the inner diameter of the forming die is blown and impurities are removed through a blowing rod, so as to ensure that the inner wall of the forming die is clean during subsequent use, thereby avoiding scratching of the rod during subsequent stamping and forming, which affects the quality of bolt forming and thread rolling. Then, the positions of the two forming dies are switched, so that work and cooling are carried out alternately.

Description

Technical Field

[0001] The present invention relates to the technical field of bolt forming, and particularly to a double-cooling bolt forming die. Background Art

[0002] A bolt refers to a part used for connecting and supporting workpieces;

[0003] Bolt forming is to process metal into a cylindrical rod, then place the heated rod into a vertical forming die, and then through the stamping of the stamping end, the metal undergoes plastic deformation in the forming die, thereby forming a bolt head. For example, Figure 1 in the case of a double-headed bolt, the threaded parts are on the left and right sides, and the diameter in the middle is smaller than that at both ends. Therefore, it is necessary to stamp both ends of the double-headed bolt and then thread it.

[0004] During the bolt forming process, the forming die will overheat when contacting with the high-temperature metal rod. Therefore, it is necessary to cool the die to maintain the stability of the die and the product quality. The existing cooling method generally uses circulating water to cool the forming die, which has low efficiency and cannot provide other effective conveniences for bolt forming while meeting the cooling requirements.

[0005] Based on this, the present invention designs a double-cooling bolt forming die to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a double-cooling bolt forming die to solve the problems raised in the above background art.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A double-cooling bolt forming die, including a machine body. A placement groove for placing a metal rod is opened at the top of the machine body. Punching rods are slidably connected to both the left and right sides above the machine body. A guiding group is provided at the end of the punching rod. Forming ends are provided on the punching rods. A hoop member is provided above the placement groove. A first cylinder is fixedly connected to the top of the hoop member, and the first cylinder is fixedly connected to the top of the machine body. Forming dies are provided on both the left and right sides of the hoop member. Cooling groups and material transfer groups are provided on both the left and right sides of the machine body. The guiding group is used to guide the forming end and the forming die;

[0008] The cooling group includes a blowing rod and a support member. The support member is slidably connected to the machine body. A conversion group is provided on one side of the support member, and the conversion group is used for the support member to slide back and forth along the machine body. Stopping members are fixedly connected to both the front and rear sides of the top end of the support member. The blowing rod is fixedly connected to the forming end. Two cavities are formed in the support member, and both of the two cavities are filled with cooling oil. Pressure rings are slidably connected inside the two cavities. The bottom end of the pressure ring extends below the support member and is slidably connected to the support member. A first spring is fixedly connected between the pressure ring and the inner wall of the cavity. Partition plates are slidably connected inside the pressure rings. The diameter of the partition plates is the same as the inner diameter of the forming die. A top plate is provided below the two pressure rings, and the top plate is fixedly connected to the stamping rod. The top plate is inclined and its top end extends horizontally to one side;

[0009] The material transfer group includes a notch formed in the forming die. A transfer rod is slidably connected to the notch. A driving group is provided below the transfer rod, and the driving group is used to transfer the forming die from above the pressure ring to one side of the hoop member.

[0010] As a further solution of the present invention, the cross-section of the top end of the partition plate is U-shaped.

[0011] As a further solution of the present invention, the driving group includes a gear fixedly connected to the transfer rod. The gear is rotatably connected to a slider. The slider is slidably connected to a chute. The chute is formed in the machine body. A limiting rod is provided below the slider. The limiting rod is slidably connected to the machine body. A second spring is fixedly connected between the limiting rod and the inner wall of the machine body. When the slider is at the leftmost side of the chute, the limiting rod will rise to the right side of the slider. An L-shaped rod is fixedly connected to the rotating shaft of the gear, and the L-shaped rod is used to press down the limiting rod. A rack bar is meshed above the gear, and the rack bar is fixedly connected to a second air cylinder. The second air cylinder is fixedly connected to the machine body.

[0012] As a further solution of the present invention, a push plate is provided on the right side of the transfer rod. The push plate is slidably connected to the machine body. A third spring is fixedly connected between the push plate and the machine body.

[0013] As a further solution of the present invention, the conversion group includes a third air cylinder, and the third air cylinder is fixedly connected between the machine body and the support member.

[0014] As a further solution of the present invention, universal wheels are provided at the bottom ends of the pressure rings.

[0015] As a further solution of the present invention, a roller is rotatably connected to the slider.

[0016] As a further solution of the present invention, a rubber layer is adhesively bonded to the top end of the pressure ring.

[0017] As a further solution of the present invention, the guiding group includes a plurality of guiding columns fixedly connected to the forming end. The guiding columns are slidably connected to the punching rod together, and a fourth spring is fixedly connected between each guiding column and the side wall of the punching rod.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. In the present invention, during the process of the forming die separating from the rod, the inner diameter of the forming die is blown and impurities are removed through the blowing rod, so as to ensure that the inner wall of the forming die is clean during subsequent use, thereby avoiding scratching of the rod during subsequent stamping and forming, which affects the quality of bolt forming and thread rolling. Then, the positions of the two forming dies are switched, so that work and cooling are carried out alternately. When the forming die presses down the pressing ring, the liquid level of the cooling oil in the cavity will rise through the inner diameter of the forming die to the position below the partition plate, and then the entire inner diameter of the forming die is immersed, thereby achieving secondary cooling and temperature reduction of the forming die, and avoiding overheating of the forming die.

[0020] 2. When the forming die rises in the cavity, the bottom end of the partition plate can scrape the inner diameter of the forming die, so that the excessive cooling oil attached to the inner diameter of the forming die can fall off after cooling the forming die. The inner wall of the forming die after secondary cooling can be attached with oil, thereby increasing its lubrication effect, facilitating the separation of the rod from the forming die after the rod is formed, and the separation of impurities from the forming die during the primary cooling of the blowing rod, thereby reducing the possibility of scratching. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of a double-headed bolt;

[0022] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the position of the third cylinder and the support member of the present invention;

[0024] Figure 4 It is a schematic diagram of the positional relationship between the pressing ring and the support member of the present invention;

[0025] Figure 5 It is a schematic diagram of the transfer rod and the forming die after position movement of the present invention;

[0026] Figure 6 It is a schematic diagram of the positional relationship between the pressing ring and the partition plate of the present invention;

[0027] Figure 7 It is a schematic diagram of the positional relationship between the machine body, the push plate and the hoop member of the present invention;

[0028] Figure 8 For Figure 7Partial enlarged view of part A

[0029] Figure 9 Structural schematic diagram of the forming die and drive group of the present invention

[0030] Figure 10 Schematic diagram of the positional relationship between the slider and the limiting rod after the slider is at the leftmost side of the present invention

[0031] Figure 11 Schematic diagram of the positional relationship between the roller, L-shaped rod and slider of the present invention

[0032] Figure 12 Structural schematic diagram of the guiding group of the present invention and cross-sectional view of the forming die

[0033] In the drawings, the list of components represented by each reference numeral is as follows

[0034] 1. Body; 2. Hoop; 3. First cylinder; 4. Stamping rod; 5. Forming end; 6. Blowing rod; 7. Support; 8. Pressure ring; 9. First spring; 10. Universal wheel; 11. Partition; 12. Forming die; 13. Top plate; 14. Notch; 15. Transfer rod; 16. Gear; 17. Slider; 18. Slide groove; 19. Limiting rod; 20. Second spring; 21. L-shaped rod; 22. Rack rod; 23. Second cylinder; 24. Push plate; 25. Third spring; 26. Third cylinder; 27. Roller; 28. Stopper; 29. Guide post; 30. Fourth spring Detailed implementation manner

[0035] Please refer to Figure 1-12 , the present invention provides a technical solution: a double-cooling type bolt forming die, including a body 1, a placement groove for placing a metal rod is opened at the top end of the body 1, stamping rods 4 are slidably connected to both the left and right sides above the body 1, a guiding group is provided at the end of the stamping rod 4, forming ends 5 are provided on the stamping rods 4, a hoop 2 is provided above the placement groove, a first cylinder 3 is fixedly connected to the top end of the hoop 2, the first cylinder 3 is fixedly connected to the top end of the body 1, forming dies 12 are provided on both the left and right sides of the hoop 2, cooling groups and material transfer groups are provided on both the left and right sides of the body 1, and the guiding group is used for guiding the forming end 5 and the forming die 12

[0036] The cooling group includes a blowing rod 6 and a support member 7. The support member 7 is slidably connected to the body 1. A conversion group is provided on one side of the support member 7 for the support member 7 to slide back and forth along the body 1. On the front and rear sides of the top end of the support member 7, a stop member 28 is fixedly connected. The blowing rod 6 is fixedly connected to the forming end 5. Two cavities are provided in the support member 7, and both cavities are filled with cooling oil. A pressure ring 8 is slidably connected in each of the two cavities. The bottom end of the pressure ring 8 extends below the support member 7 and is slidably connected to the support member 7. A first spring 9 is fixedly connected between the pressure ring 8 and the inner wall of the cavity. A partition plate 11 is slidably connected inside each pressure ring 8. The diameter of the partition plate 11 is the same as the inner diameter of the forming die 12. A top plate 13 is provided below the two pressure rings 8. The top plate 13 is fixedly connected to the punching rod 4. The top plate is inclined and its top end extends horizontally to one side;

[0037] The material transfer group includes a notch 14 opened on the forming die 12. A transfer rod 15 is slidably connected to the notch 14. A driving group is provided below the transfer rod 15 for transferring the forming die 12 from above the pressure ring 8 to one side of the hoop member 2.

[0038] As Figures 2-9 shown:

[0039] The guiding group can guide the forming end 5 and the forming die 12 during insertion;

[0040] The cooling group and the material transfer group on the left side are used to introduce the present invention:

[0041] The two pressure rings 8 are respectively divided into a working station a and a working station b. There are two forming dies 12 on both sides of the hoop member 2. One is in a position where it fits against the side wall of the hoop member 2, which is represented by c, and the other is above one of the two pressure rings 8 (working station b), which is represented by d;

[0042] The placement work of the rod:

[0043] Place the rod to be punched with both ends heated on the placement groove at the top end of the body 1. Then, by the elongation of the first cylinder 3, the hoop member 2 can be lowered to a position where it fits against the body 1. At this time, the hoop member 2 will fix the middle position of the rod, and the left and right ends of the rod will be in an exposed state. Then, drive the transfer rod 15 through the driving group to move a forming die 12 to a state where it is sleeved on the end of the rod and fits against the side wall of the hoop member 2, and the inner diameter of the forming die 12 is slightly larger than the diameter of the rod, so that the rod can undergo plastic deformation when being punched;

[0044] The stamping and forming work of the rod:

[0045] The stamping rod 4 is driven by an external hydraulic device to move along the machine body 1 towards the rod. When the forming end 5 contacts the rod located inside the forming die 12, it will stamp the rod, and then the rod will be formed inside the forming die 12. Then, the stamping rod 4 can be reset to the left. During the process of the stamping rod 4 resetting to the left, the air blowing rod 6 will continuously blow air. At this time, the air blowing rod 6 will perform a preliminary cooling operation on the forming die 12. Until the stamping rod 4 is reset, the air blowing rod 6 will continue to blow air on the forming die 12;

[0046] Then, the driving group and the transfer rod 15 will transfer the forming die 12 that is in contact with the side wall of the hoop 2 to the left;

[0047] The transfer work is as follows:

[0048] The driving group will drive the transfer rod 15 to move from the rightmost side to the left. At this time, the forming die 12 (this forming die 12 is c) will move along the rod fixed by the hoop 2 to the left. At this time, the rod will slide relative to the inner wall of the forming die 12. During the process of the forming die 12 gradually separating from the rod to the left, the air blowing rod 6 will blow air into the inner diameter of the forming die 12, and then cool it during the process of the forming die 12 separating from the rod. Until the forming die 12 is completely separated from the rod, the cold air blown by the air blowing rod 6 will flow through the entire inner diameter of the forming die 12, and then completely cool the inner diameter of the forming die 12 to avoid overheating. And through the air blowing of the air blowing rod 6 for cooling once, it can also remove impurities from the inner diameter of the forming die 12 (because the rod is heated before stamping, and after stamping, the impurities on the rod will gradually fall off, resulting in fine debris that may remain inside the forming die 12). The impurities on the inner wall of the forming die 12 are removed while being cooled by the wind force, so as to ensure that the inner wall of the forming die 12 is clean during subsequent use, thereby avoiding scratching the rod during subsequent stamping and forming, which affects the quality of bolt forming and thread rolling;

[0049] When the transfer rod 15 moves to the leftmost side, the forming die 12 has completely separated from the rod. At this time, the hoop 2 can be lifted, and then the stamped rod can be taken out and a new rod can be replaced. At this time, the driving group will make the transfer rod 15 rotate 90 degrees around the bottom end. At this time, the forming die 12 on the transfer rod 15 will rotate from the horizontal state to the vertical state. After the forming die 12 rotates 90 degrees, its top end will move directly above the pressing ring 8 at the working station a on the left. However, because the stamping rod 4 is at the leftmost side, the top plate 13's support for the bottom end of the pressing ring 8 makes the pressing ring 8 unable to slide down along the cavity. Then, at this time, the forming die 12 will stay above the pressing ring 8 at the a working station, that is, c stays above the a working station. Then, the conversion group will drive the support member 7 to slide backward along the machine body 1. Then, the blocking member 28 at the a working station will push c backward behind c, and then c will be separated from the middle position of the top end of the transfer rod 15 through the notch 14 (as Figure 5As shown, when the support member 7 moves backward, the forming die 12 (i.e., d) at the b station moves backward and will move to the position before a does not move backward, that is, at this time d will move above the transfer rod 15 (i.e., the position before c is disengaged from the transfer rod 15). At this time, the replacement of the forming die 12 is completed, so that c and d that have just undergone stamping work are replaced, and thus c can have a longer cooling time;

[0050] Then the preparation for the next stamping can be carried out. At this time, after placing a new rod on the placement groove, the first cylinder 3 extends to drive the hoop member 2 to fix the rod;

[0051] At this time, the driving group first drives the transfer rod 15 to rotate 90 degrees from the horizontal state to the vertical state, that is, the transfer rod 15 drives d to rotate 90 degrees. At this time, d will be in a horizontal state. Then the driving group drives the transfer rod 15 to translate until the right end of d contacts and stops after the inner diameter of d passes through the end of the rod. Then the stamping rod 4 moves to the right again until the forming end 5 contacts the left end of the rod, and the rod is formed again inside d;

[0052] Secondary cooling:

[0053] When the stamping rod 4 moves to the right until the top plate 13 passes over the bottom end of the pressure ring 8, c at the a station will press down the pressure ring 8 under its own gravity, causing the pressure ring 8 to slide down along the inner wall of the cavity. At this time, the first spring 9 will be compressed. After the pressure ring 8 descends, the outer diameter of the partition plate 11 will contact the inner diameter of c and slide relative to the inner diameter of d. There is cooling oil inside the cavity. When c and the pressure ring 8 descend to the limit, the top end of the inner diameter of c will be flush with the top end of the partition plate 11, and the liquid level of the cooling oil inside the cavity will rise through the inner diameter of c to the position below the partition plate 11, thereby soaking the entire inner diameter of c, so as to achieve secondary cooling and temperature reduction of the forming die 12;

[0054] When the forming die 12 (c) presses down the pressure ring 8 to the bottom of the cavity under its own gravity, the inner diameter of the forming die 12 will be scraped from the bottom up by the partition plate 11, so that impurities can remain at the top end of the partition plate 11, thereby ensuring that impurities inside the forming die 12 will not remain inside the forming die 12 and will not be brought into the cooling oil;

[0055] After the stamping rod 4 finishes stamping, it will reset to the left. When the stamping rod 4 resets to the left to the extreme, the top plate 13 will lift the pressure ring 8, so that the pressure ring 8 and the forming die 12(c) can rise from the inside of the cavity to the extreme height. Then the driving group drives the transfer rod 15 to move d to the leftmost. When the transfer rod 15 rotates 90 degrees, it will be above the pressure ring 8 at the working station b. At this time, the inner diameter of d is above the partition plate 11. Then the conversion group works again to make the support 7 slide forward. At this time, the stopper 28 at the working station b pushes d forward behind d, so that the notch 14 of d is separated from the transfer rod 15. At this time, c that has been cooled twice will move above the transfer rod 15 for alternate work;

[0056] After the stamping rod 4 finishes stamping and resets to the left, when the stamping rod 4 resets to the left to the extreme and the top plate 13 lifts the pressure ring 8, when the forming die 12(c) rises, it can scrape the inner diameter of the forming die 12 through the bottom end of the partition plate 11, so that the excessive cooling oil attached to the inner diameter of the forming die 12 can fall off after cooling the forming die 12;

[0057] The inner wall of the forming die 12 after being cooled twice can be oil-attached, thereby increasing its lubrication effect, facilitating the separation from the forming die 12 after the rod is formed, and the separation of impurities from the forming die 12 when the blowing rod 6 is cooled once;

[0058] When c that has been cooled twice moves above the transfer rod 15, the driving group works again to make c move towards the side wall of the hoop 2, so as to work alternately with d, and the above process forms a cycle, so that each forming operation can make c and d work alternately;

[0059] In the present invention, during the process of the forming die 12 gradually separating from the rod to the left, the blowing rod 6 will blow air and remove impurities from the inner diameter of the forming die 12, so as to ensure that the inner wall of the forming die 12 is in a clean state during subsequent use, so as to avoid scratching the rod during subsequent stamping and forming, which affects the quality of bolt forming and thread rolling. Then the positions of the two forming dies 12 are converted to make work and cooling alternate. When the forming die 12 presses down the pressure ring 8, the liquid level of the cooling oil inside the cavity will rise through the inner diameter of c to the position below the partition plate 11, so as to soak the entire inner diameter of c, thereby achieving secondary cooling and temperature reduction of the forming die 12, and thus avoiding overheating of the forming die 12;

[0060] When the forming die 12 rises inside the cavity, it can scrape the inner diameter of the forming die 12 through the bottom end of the partition plate 11, so that the excessive cooling oil adhering to the inner diameter of the forming die 12 can fall off after cooling the forming die 12. The inner wall of the forming die 12 after secondary cooling can be oiled, thereby increasing its lubrication effect, facilitating the separation from the forming die 12 after the rod is formed, and separating impurities from the forming die 12 when the blowing rod 6 is cooled for the first time, thereby reducing the possibility of scratching.

[0061] The cross-section of the top end of the partition plate 11 is U-shaped.

[0062] Such as Figure 6 shown:

[0063] The partition plate 11 with a U-shaped cross-section can conveniently store the impurities scraped from the inner diameter of the forming die 12.

[0064] The driving group includes a gear 16 fixedly connected to the transfer rod 15. The gear 16 is rotatably connected to a slider 17. The slider 17 is slidably connected to a chute 18. The chute 18 is opened on the machine body 1. A limiting rod 19 is arranged below the slider 17. The limiting rod 19 is slidably connected to the machine body 1. A second spring 20 is fixedly connected between the limiting rod 19 and the inner wall of the machine body 1. When the slider 17 is at the leftmost side of the chute 18, the limiting rod 19 will rise to the right side of the slider 17. An L-shaped rod 21 is fixedly connected to the rotating shaft of the gear 16. The L-shaped rod 21 is used to press down the limiting rod 19. A rack bar 22 is meshed above the gear 16. The rack bar 22 is fixedly connected to a second air cylinder 23. The second air cylinder 23 is fixedly connected to the machine body 1.

[0065] A push plate 24 is arranged on the right side of the transfer rod 15. The push plate 24 is slidably connected to the machine body 1. A third spring 25 is fixedly connected between the push plate 24 and the machine body 1.

[0066] Such as Figure 2 and 7- Figure 11 shown:

[0067] When the forming die 12 (c) is separated from the rod after stamping:

[0068] When the second cylinder 23 extends, it drives the rack bar 22 to move leftward. Although the rack bar 22 meshes with the gear 16, when the rack bar 22 moves leftward, under the push of the push plate 24 and the extension of the second cylinder 23, the rack bar 22 cannot drive the gear 16 to rotate. At this time, the end of the L-shaped rod 21 will keep pressing down on the limiting rod 19, causing the slider 17 to slide from the rightmost side to the leftmost side along the chute 18. At this time, the second spring 20 remains in a compressed state before the slider 17 slides leftward to the limit state. And the transfer rod 15 is below c. At this time, the static friction between the transfer rod 15 and the notch 14, as well as the elastic relaxation of the third spring 25, act on the push plate 24, and then the push plate 24 will push the forming die 12 to move leftward from the right side, facilitating the separation of the forming die 12 from the rod member.

[0069] After the slider 17 slides leftward to the limit state, the right side wall of the slider 17 is on the left side of the limiting rod 19. At this time, the push plate 24 is also about to move leftward to the limit. At this time, the limiting rod 19 rises under the reset action of the second spring 20. At this time, with the extension of the second cylinder 23, the rack bar 22 will mesh with the gear 16, enabling the gear 16 to drive the transfer rod 15 and the forming die 12 (c) to rotate 90 degrees from the horizontal state to the vertical state. During this 90-degree rotation, the push plate 24 will move leftward to the limit and then separate from the forming die 12. Then the forming die 12 rotates to the position where it contacts the pressing ring 8. Then the conversion group drives the support member 7 to move, causing c and d to move back and forth, and further enabling d to move above the transfer rod 15.

[0070] When the stamping work is carried out again, a new rod member is placed on the placement groove and fixed by the hoop member 2. Then the second cylinder 23 shortens, driving the rack bar 22 to move. At this time, the limiting rod 19 blocks the right side of the slider 17. So at this time, the gear 16 will directly rotate, enabling the transfer rod 15 to drive d to rotate 90 degrees to the horizontal state. When it is about to rotate 90 degrees, the side wall of the forming die 12 will contact the push plate 24 and compress the third spring 25. By compressing the third spring 25, the push plate 24 can block the right side wall of the forming die 12 to prevent the forming die 12 and the transfer rod 15 from shifting due to the inertia during rotation. When the gear 16 rotates 90 degrees, the end of the L-shaped rod 21 will press down on the limiting rod 19, causing it to drop to a position lower than the bottom end of the slider 17. At this time, with the shortening of the second cylinder 23, the transfer rod 15, the slider 17, and the forming die 12 will move rightward to a position where they fit against the side wall of the hoop member 2, and then the stamping rod 4 can carry out stamping again.

[0071] The conversion group includes a third cylinder 26, and the third cylinder 26 is fixedly connected between the machine body 1 and the support member 7.

[0072] As Figure 3 and Figure 4 shown:

[0073] The telescopic movement of the third cylinder 26 drives the support member 7 to slide inside the machine body 1, and further moves the two stoppers 28 to move the two forming dies 12 to move back and forth.

[0074] Universal wheels 10 are provided at the bottom ends of the pressing rings 8.

[0075] As Figure 4 shown:

[0076] The universal wheels 10 can reduce the friction between the pressing ring 8 and the top plate 13 when the position of the support member 7 changes back and forth.

[0077] A roller 27 is rotatably connected to the slider 17.

[0078] As Figure 11 shown:

[0079] The roller 27 reduces the resistance when the slider 17 slides inside the chute 18.

[0080] A rubber layer is adhesively bonded to the top end of the pressing ring 8.

[0081] The rubber layer is a prior art, so it is not specifically shown in the figure. It is used to seal the bottom wall of the forming die 12 when the forming die 12 contacts the pressing ring 8, and further prevent the cooling oil from soaking into the space between the bottom of the forming die 12 and the pressing ring 8.

[0082] The guiding group includes a plurality of guiding columns 29 fixedly connected to the forming end 5. The guiding columns 29 are slidably connected to the punching rod 4 together, and fourth springs 30 are fixedly connected between the guiding columns 29 and the side wall of the punching rod 4.

[0083] As Figure 2 and Figure 12 shown:

[0084] The port of the inner wall of the forming die 12 is conical. When the forming end 5 contacts the conical inner wall of the forming die 12, the position of the forming die 12 can be adjusted while the forming end 5 moves, so that the forming die 12 can slide along the transfer rod 15, and the inner wall of the forming die 12 can be coaxial with the forming end 5, which is convenient for the insertion of the forming end 5.

Claims

1. A double-cooling type bolt forming die, comprising a machine body (1). A placement groove for placing a metal rod is formed at the top of the machine body (1). Punching rods (4) are slidably connected to both the left and right sides above the machine body (1). A guiding group is arranged at the end of the punching rod (4), and it is characterized in that: Forming ends (5) are provided on the stamping rods (4). A hoop member (2) is provided above the placement groove. The top end of the hoop member (2) is fixedly connected to a first cylinder (3). The first cylinder (3) is fixedly connected to the top end of the machine body (1). Forming dies (12) are provided on both the left and right sides of the hoop member (2). Cooling groups and material transfer groups are provided on both the left and right sides of the machine body (1). The guiding group is used to guide the forming end (5) and the forming die (12). The cooling group includes a blowing rod (6) and a support member (7). The support member (7) is slidably connected to the machine body (1). A conversion group is provided on one side of the support member (7). The conversion group is used to slide the support member (7) back and forth along the machine body (1). Stopping members (28) are fixedly connected to both the front and rear sides of the top end of the support member (7). The blowing rod (6) is fixedly connected to the forming end (5). Two cavities are formed in the support member (7). Cooling oil is filled in both of the two cavities. Pressing rings (8) are slidably connected to the interiors of the two cavities. The bottom end of the pressing ring (8) extends below the support member (7) and is slidably connected to the support member (7). A first spring (9) is fixedly connected between the pressing ring (8) and the inner wall of the cavity. Partition plates (11) are slidably connected to the interiors of the pressing rings (8). The diameter of the partition plate (11) is the same as the inner diameter of the forming die (12). A top plate (13) is provided below the two pressing rings (8). The top plate (13) is fixedly connected to the stamping rod (4). The top plate (13) is inclined and its top end extends horizontally to one side. The material transfer group includes a notch (14) formed in the forming die (12). A transfer rod (15) is slidably connected to the notch (14). A driving group is provided below the transfer rod (15). The driving group is used to transfer the forming die (12) from above the pressing ring (8) to one side of the hoop member (2).

2. The double-cooling type bolt forming die according to claim 1, wherein: The cross-section of the top end of the partition plate (11) is U-shaped.

3. A double-cooling type bolt forming die according to claim 1, characterized in that: The driving group includes a gear (16) fixedly connected to the transfer rod (15). The gear (16) is rotatably connected to a slider (17). The slider (17) is slidably connected to a chute (18). The chute (18) is formed in the machine body (1). A limiting rod (19) is provided below the slider (17). The limiting rod (19) is slidably connected to the machine body (1). A second spring (20) is fixedly connected between the limiting rod (19) and the inner wall of the machine body (1). When the slider (17) is at the leftmost side of the chute (18), the limiting rod (19) will rise to the right side of the slider (17). An L-shaped rod (21) is fixedly connected to the rotating shaft of the gear (16). The L-shaped rod (21) is used to press down the limiting rod (19). A rack bar (22) is meshed above the gear (16). The rack bar (22) is fixedly connected to a second cylinder (23). The second cylinder (23) is fixedly connected to the machine body (1).

4. A double-cooling type bolt forming die according to claim 3, wherein: A push plate (24) is arranged on the right side of the transfer rod (15). The push plate (24) is slidably connected to the machine body (1), and a third spring (25) is fixedly connected between the push plate (24) and the machine body (1).

5. A double-cooling type bolt forming die according to claim 1, characterized in that: The conversion group includes a third air cylinder (26), and the third air cylinder (26) is fixedly connected between the machine body (1) and the support member (7).

6. A double-cooling type bolt forming die according to claim 1, characterized in that: Universal wheels (10) are arranged at the bottom ends of the pressing rings (8).

7. A double-cooling type bolt forming die according to claim 3, characterized in that: A roller (27) is rotatably connected to the slider (17).

8. A double-cooling type bolt forming die according to claim 1, characterized in that: A rubber layer is adhesively bonded to the top end of the pressing ring (8).

9. A double-cooling type bolt forming die according to claim 1, wherein: The guiding group includes a plurality of guiding columns (29) fixedly connected to the forming end (5). The guiding columns (29) are commonly slidably connected to the stamping rod (4), and fourth springs (30) are fixedly connected between the guiding columns (29) and the side wall of the stamping rod (4).

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