Double-cooling type bolt forming die

Abstract

The double-cooling type bolt forming die comprises a machine body, a containing groove used for containing a metal rod is formed in the top end of the machine body, stamping rods are slidably connected to the left side and the right side of the upper portion of the machine body correspondingly, forming ends are connected to the stamping rods correspondingly, and a hoop part is arranged above the containing groove; the top end of the hoop piece is fixedly connected with a first air cylinder; in the process that the forming die is separated from the rod piece, air blowing and impurity removal are carried out on the inner diameter of the forming die through the air blowing rod, then it is ensured that the inner wall of the forming die is in a clean state in the subsequent use process, and therefore the situation that the rod piece is scratched in the subsequent punch forming process, and the bolt forming quality and the thread rolling quality are affected is avoided; and then the positions of the two forming dies are switched, so that working and cooling are alternately carried out.

Description

Technical Field

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

[0002] Bolts are parts used to connect and support workpieces;

[0003] Bolt forming is a process of processing metal into cylindrical rods, then placing the heated rods into a vertical forming die, and finally using the punching end to cause plastic deformation in the forming die to form the bolt head. Figure 1 For example, the threaded parts of the stud bolt are on the left and right sides, and the diameter of the middle part is smaller than that of the two ends, so it is necessary to stamp the two ends of the stud bolt and then rub out the threads;

[0004] During the bolt forming process, the forming mold will overheat when in contact with the high-temperature metal rod, so the mold needs to be cooled to maintain the stability of the mold and the product quality. The existing cooling method generally uses circulating water to cool the forming mold, which is inefficient 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] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a double-cooling bolt forming mold, comprising a machine body, a placement groove for placing a metal rod is provided at the top of the machine body, punching rods are slidably connected to the left and right sides of the top of the machine body, a guide group is provided at the end of the punching rod, and a forming end is provided on the punching rod, a hoop is provided above the placement groove, a first cylinder is fixedly connected to the top of the hoop, and the first cylinder is fixedly connected to the top of the machine body, forming dies are provided on the left and right sides of the hoop, cooling groups and material transfer groups are provided on the left and right sides of the machine body, and the guide group is used to guide the forming end and the forming die;

[0007] 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 arranged on one side of the support member, the conversion group is used for the support member to slide forward and backward along the machine body, the front and rear sides of the top of the support member are fixedly connected with a stopper, the blowing rod is fixedly connected to the forming end, two cavities are provided on the support member, the insides of the two cavities are filled with cooling oil, the insides of the two cavities are slidably connected with a pressure ring, the bottom end of the pressure ring extends to the bottom of 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, a partition is slidably connected inside the pressure ring, the diameter of the partition is the same as the inner diameter of the forming mold, a top plate is commonly arranged below the two pressure rings, the top plate is fixedly connected to the punching rod, the top plate is inclined and its top extends horizontally to one side;

[0008] The material transfer group includes a notch opened on the forming die, the notch is slidably connected with a transfer rod, and a driving group is arranged below the transfer rod. The driving group is used to transfer the forming die from above the pressure ring to one side of the hoop.

[0009] As a further solution of the present invention, the cross-section of the top end of the partition is U-shaped.

[0010] 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 slide groove, the slide groove is opened on the machine body, a limit rod is arranged under the slider, the limit rod is slidably connected to the machine body, a second spring is fixedly connected between the limit rod and the inner wall of the machine body, when the slider is at the leftmost side of the slide groove, the limit rod will rise to the right side of the slider, an L-shaped rod is fixedly connected to the rotating shaft of the gear, the L-shaped rod is used to press down the limit rod, a rack rod is meshed above the gear, the rack rod is fixedly connected to a second cylinder, and the second cylinder is fixedly connected to the machine body.

[0011] 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, and a third spring is fixedly connected between the push plate and the machine body.

[0012] As a further solution of the present invention, the conversion group includes a third cylinder, and the third cylinder is fixedly connected between the machine body and the support member.

[0013] As a further solution of the present invention, a universal wheel is provided at the bottom end of the pressure ring.

[0014] As a further solution of the present invention, a roller is rotatably connected to the sliding block.

[0015] As a further solution of the present invention, a rubber layer is glued to the top of the pressure ring.

[0016] As a further solution of the present invention, the guide group includes a plurality of guide columns fixedly connected to the forming end, the guide columns are slidably connected to the punching rod, and a fourth spring is fixedly connected between the guide columns and the side wall of the punching rod.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the present invention, during the separation of the forming mold and the rod, the inner diameter of the forming mold is blown and impurities are removed by the blowing rod, thereby ensuring that the inner wall of the forming mold is in a clean state during subsequent use, thereby avoiding scratches on the rod during subsequent stamping and forming, which affects the quality of bolt forming and thread rolling. The two forming molds are then switched in position to alternate between work and cooling. When the forming mold presses the pressure ring down, the liquid level of the cooling oil inside the cavity will rise through the inner diameter of the forming mold to the position below the partition, thereby immersing the entire inner diameter of the forming mold, thereby achieving secondary cooling of the forming mold and avoiding overheating of the forming mold.

[0019] 2. The inner diameter of the forming mold can be scraped off by the bottom end of the partition during its rise inside the cavity, so that excess cooling oil adhering to the inner diameter of the forming mold can fall off after the forming mold is cooled. The inner wall of the forming mold after secondary cooling can be oiled, thereby increasing its lubrication effect, making it easy to separate the rod from the forming mold after forming, and separating impurities from the forming mold when the blow rod is cooled once, thereby reducing the possibility of scratches. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of a stud bolt;

[0021] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the positions of the third cylinder and the support member of the present invention;

[0023] Figure 4 It is a schematic diagram of the positional relationship between the pressure ring and the support member of the present invention;

[0024] Figure 5 It is a schematic diagram of the transfer rod and the forming die that has been moved through the position of the present invention;

[0025] Figure 6 It is a schematic diagram of the positional relationship between the pressure ring and the partition plate of the present invention;

[0026] 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;

[0027] Figure 8 for Figure 7A partial enlarged view of the middle A;

[0028] Fig. 9 It is a structural schematic diagram of the forming die and the driving group of the present invention;

[0029] Fig.10 It is a schematic diagram of the position relationship between the slider and the limit rod when the slider is at the leftmost position;

[0030] Fig.11 It is a schematic diagram of the positional relationship between the roller, the L-shaped rod and the slider of the present invention;

[0031] Fig.12 It is a structural schematic diagram of the guide group of the present invention and a cross-sectional view of the forming mold.

[0032] In the accompanying drawings: 1. body; 2. hoop; 3. first cylinder; 4. punching rod; 5. forming end; 6. blowing rod; 7. supporting member; 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. limit 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 column; 30. fourth spring. DETAILED DESCRIPTION

[0033] See also Figure 1-Figure 12 The present invention provides a technical solution: a double-cooling bolt forming mold, comprising a machine body 1, a placement slot for placing a metal rod is opened at the top of the machine body 1, a punching rod 4 is slidably connected to the left and right sides above the machine body 1, a guide group is arranged at the end of the punching rod 4, a forming end 5 is arranged on the punching rod 4, a hoop 2 is arranged above the placement slot, a first cylinder 3 is fixedly connected to the top of the hoop 2, the first cylinder 3 is fixedly connected to the top of the machine body 1, a forming die 12 is arranged on the left and right sides of the hoop 2, a cooling group and a material transfer group are arranged on the left and right sides of the machine body 1, and the guide group is used to guide the forming end 5 and the forming die 12;

[0034] 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 arranged on one side of the support member 7, the conversion group is used for the support member 7 to slide forward and backward along the body 1, the front and rear sides of the top of the support member 7 are fixedly connected with a stopper 28, the blowing rod 6 is fixedly connected to the forming end 5, the support member 7 is provided with two cavities, the inside of the two cavities are filled with cooling oil, the inside of the two cavities are slidably connected with a pressure ring 8, the bottom end of the pressure ring 8 extends to the bottom of 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 11 is slidably connected inside the pressure ring 8, the diameter of the partition 11 is the same as the inner diameter of the forming mold 12, a top plate 13 is arranged together 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 extends horizontally to one side;

[0035] The material transfer group includes a notch 14 formed on the forming die 12 , the notch 14 is slidably connected with a transfer rod 15 , and a driving group is arranged below the transfer rod 15 , and the driving group is used to transfer the forming die 12 from above the pressure ring 8 to one side of the hoop 2 .

[0036] like Figure 2-Figure 9 As shown:

[0037] The guide group can guide the forming end 5 and the forming die 12 during insertion;

[0038] The present invention is introduced with the cooling group and the material transfer group on the left side:

[0039] The two pressing rings 8 are divided into a station a and a station b respectively. The two sides of the hoop 2 are provided with two forming dies 12 respectively, one of which is located at a position in contact with the side wall of the hoop 2 and is indicated by c, and the other is located above one of the two pressing rings 8 (station b) and is indicated by d;

[0040] Rod placement work:

[0041] The rod to be punched, which has been heated at both ends, is placed on the placement groove at the top of the machine body 1, and then the hoop 2 is allowed to drop to a position in contact with the machine body 1 by the extension of the first cylinder 3. At this time, the hoop 2 will fix the middle position of the rod, and the left and right ends of the rod are exposed. Then, the driving group drives the transfer rod 15 to move a forming die 12 to a state where it is sleeved on the end of the rod and in contact with the side wall of the hoop 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;

[0042] Rod stamping work:

[0043] The punching rod 4 is driven by an external hydraulic device to approach the rod along the machine body 1. When the forming end 5 contacts the rod inside the forming die 12, the rod is punched, and the rod is formed inside the forming die 12. Then the punching rod 4 can be reset to the left. During the process of the punching rod 4 being reset to the left, the blowing rod 6 will continue to blow air. At this time, the blowing rod 6 will perform a preliminary cooling work on the forming die 12. After the punching rod 4 is reset, the blowing rod 6 will continue to blow air to the forming die 12.

[0044] Then the driving group and the transfer rod 15 will transfer the forming die 12 which is in contact with the side wall of the hoop 2 to the left;

[0045] The transfer works as follows:

[0046] The driving group will drive the transfer rod 15 to move from the rightmost side to the left. At this time, the forming mold 12 (the forming mold 12 is c) will move to the left along the rod fixed by the hoop 2. At this time, the rod will slide relative to the inner wall of the forming mold 12. During the process of the forming mold 12 gradually separating from the rod to the left, the blowing rod 6 will blow air to the inner diameter of the forming mold 12, and then cool the forming mold 12 during the process of separating from the rod. After the forming mold 12 is completely separated from the rod, the cold air blown by the blowing rod 6 will circulate in the entire inner diameter of the forming mold 12, and then the forming mold 12 is completely separated from the rod. The inner diameter of the forming die 12 is cooled to avoid overheating, and the blowing of the blowing rod 6 is used for cooling once, and the inner diameter of the forming die 12 can also be cleaned (because the rod is heated before stamping, and the impurities on the rod will gradually fall off after the stamping is completed, which may cause fine debris to remain inside the forming die 12), so that the impurities on the inner wall of the forming die 12 are cleaned while the wind cools down, and the inner wall of the forming die 12 is ensured to be in a clean state during subsequent use, so as to avoid scratching the rod during subsequent stamping and affecting the quality of bolt forming and thread rolling;

[0047] When the transfer rod 15 moves to the leftmost position, the forming die 12 has completely separated from the rod member, and the hoop member 2 can be raised, and then the stamped rod member can be taken out and replaced with a new rod member. At this time, the driving group will cause the transfer rod 15 to rotate ninety degrees around the bottom end. At this time, the forming die 12 on the transfer rod 15 will rotate from a horizontal state to a vertical state. After the forming die 12 rotates ninety degrees, its top end will move to the left side, just above the pressing ring 8 at station a. However, because the stamping rod 4 is at the leftmost position, the top plate 13 supports the bottom end of the pressing ring 8, so that the pressing ring 8 cannot slide down along the cavity. At this time, the forming die 12 will stay above the pressing ring 8 at station a, that is, c stays above station a, and then the conversion group will drive the support member 7 to slide backward along the body 1. At this time, the stopper 28 on station a will push c backward from the rear of c, and then c will separate from the middle position of the top end of the transfer rod 15 through the notch 14 (as shown in FIG. Figure 5As shown in the figure, when the support member 7 moves backward, the forming die 12 (i.e., d) at the b station moves backward to the position before a moves backward, that is, at this time, d moves to the top of the transfer rod 15 (i.e., the position before c is separated from the transfer rod 15), and the replacement of the forming die 12 is completed at this time, so that c that has just undergone the stamping work is replaced with d, so that c can have a longer cooling time;

[0048] Then, another stamping preparation can be carried out. At this time, a new rod is placed on the placement groove, and the rod is fixed by the hoop 2 driven by the extension of the first cylinder 3;

[0049] 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, and then the driving group drives the transfer rod 15 to translate to the inner diameter of d through the end of the rod, and the right end of d will contact the hoop 2 and stop, and the rear punching rod 4 moves rightward again to the forming end 5 and contacts the left end of the rod to make the rod re-formed inside d;

[0050] Secondary cooling:

[0051] After the punch rod 4 moves rightward to the top plate 13 and passes over the bottom end of the pressure ring 8, c at the a station will press down the pressure ring 8 under the action of 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, and after the pressure ring 8 drops, the outer diameter of the partition 11 will contact the inner diameter of c and will slide down relative to the inner diameter of d. Cooling oil is provided inside the cavity. When c and the pressure ring 8 drop to the limit, the top of the inner diameter of c will be flush with the top of the partition 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 11, and then soak the entire inner diameter of c, thereby playing a secondary cooling and cooling role in the forming die 12.

[0052] When the forming die 12(c) presses the pressing ring 8 to the bottom of the cavity under its own gravity, the inner diameter of the forming die 12 is scraped from bottom to top through the partition 11, so that impurities can remain on the top of the partition 11, thereby ensuring that the impurities inside the forming die 12 will not remain inside the forming die 12 and be brought into the cooling oil;

[0053] When the punch rod 4 is completed after punching, it will return to the left. When the punch rod 4 returns to the left to the limit, the top plate 13 will lift the pressure ring 8, so that the pressure ring 8 and the forming mold 12 (c) can rise to the limit height from the inside of the cavity, and then the driving group drives the transfer rod 15 to move d to the leftmost side. When the transfer rod 15 rotates ninety degrees, it will be above the pressure ring 8 on the station b. At this time, the inner diameter of d is above the partition 11, and then the conversion group works again to make the support member 7 slide forward. At this time, the stopper 28 on the station b pushes d forward from the rear of d, so that the notch 14 of d is separated from the transfer rod 15. At this time, c, which has been cooled for the second time, will move to the top of the transfer rod 15 for alternating work;

[0054] When the punching rod 4 is completed, it will return to the left. When the punching rod 4 returns to the left to the limit, the top plate 13 will lift the pressure ring 8. During the rising of the forming die 12 (c), the bottom end of the partition 11 can scrape the inner diameter of the forming die 12, so that the excessive cooling oil attached to the inner diameter of the forming die 12 can fall off after the forming die 12 is cooled.

[0055] After the secondary cooling, the inner wall of the forming mold 12 can be coated with oil, thereby increasing its lubrication effect, making it easier to separate the rod from the forming mold 12 after forming, and to separate impurities from the forming mold 12 when the blow rod 6 is cooled once;

[0056] After the secondary cooling, c moves to the top of the transfer rod 15, and the driving group works again to move c toward the side wall of the hoop 2, and then works alternately with d, and the above process forms a cycle, so that each molding work can make c and d work alternately;

[0057] In the present invention, the inner diameter of the forming mold 12 is blown and impurities are removed by the blowing rod 6 during the process of the forming mold 12 gradually separating from the rod to the left, thereby ensuring that the inner wall of the forming mold 12 is in a clean state during subsequent use, so as to avoid scratching the rod during subsequent stamping and forming, thereby affecting the quality of bolt forming and thread rolling. Then, the two forming molds 12 are switched in position, so that work and cooling are performed alternately. When the forming mold 12 presses the pressure ring 8 downward, the liquid level of the cooling oil in the cavity will rise to the position below the partition 11 through the inner diameter of c, and then the entire inner diameter of c is soaked, thereby playing a secondary cooling and cooling role in the forming mold 12, thereby avoiding overheating of the forming mold 12.

[0058] When the forming mold 12 rises inside the cavity, the inner diameter of the forming mold 12 can be scraped off by the bottom end of the partition 11, so that excess cooling oil attached to the inner diameter of the forming mold 12 can fall off after the forming mold 12 is cooled. After the secondary cooling, the inner wall of the forming mold 12 can be oiled, thereby increasing its lubrication effect, making it convenient to separate the rod from the forming mold 12 after forming, and separating impurities from the forming mold 12 when the blow rod 6 is cooled once, thereby reducing the possibility of scratches.

[0059] The cross section of the top end of the partition 11 is U-shaped.

[0060] like Figure 6 As shown:

[0061] The partition plate 11 with a U-shaped cross section can conveniently temporarily store impurities scraped off the inner diameter of the forming die 12 .

[0062] 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 slide groove 18, the slide groove 18 is opened on the body 1, a limit rod 19 is arranged below the slider 17, the limit rod 19 is slidably connected to the body 1, a second spring 20 is fixedly connected between the limit rod 19 and the inner wall of the body 1, when the slider 17 is at the leftmost side of the slide groove 18, the limit 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 limit rod 19, a rack rod 22 is meshed above the gear 16, the rack rod 22 is fixedly connected to a second cylinder 23, and the second cylinder 23 is fixedly connected to the body 1.

[0063] A push plate 24 is provided 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 .

[0064] like Figure 2 and 7- Fig.11 As shown:

[0065] When the forming die 12 (c) is separated from the stamped rod:

[0066] The second cylinder 23 extends to drive the rack rod 22 to move leftward. Although the rack rod 22 is meshed with the gear 16, the rack rod 22 cannot drive the gear 16 to rotate under the push of the push plate 24 and the extension of the second cylinder 23 when the rack rod 22 moves leftward. At this time, the end of the L-shaped rod 21 will keep pressing the limit rod 19 to make the slider 17 slide from the rightmost side to the leftmost side along the slide groove 18. At this time, the second spring 20 continues to be compressed before the slider 17 slides to the left 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 and the elastic relaxation of the third spring 25 will push the forming mold 12 to move leftward from the right side through the push plate 24, thereby facilitating the separation of the forming mold 12 from the rod member.

[0067] When the slider 17 slides to the left to the limit state, the right side wall of the slider 17 is on the left side of the limit rod 19. At this time, the push plate 24 is about to move to the left to the limit degree. At this time, the limit rod 19 rises under the reset action of the second spring 20. At this time, as the second cylinder 23 extends, the rack rod 22 will mesh with the gear 16, so that the gear 16 can drive the transfer rod 15 and the forming mold 12 (c) to rotate ninety degrees from the horizontal state to the vertical state. During the ninety-degree rotation, the push plate 24 will move to the left to the limit degree and then break away from the forming mold 12, and then the forming mold 12 will rotate to the position in contact with the pressure ring 8, and then the conversion group will drive the support member 7 to move so that c and d move forward and backward, and then d moves to the top of the transfer rod 15;

[0068] When the stamping work is carried out again, a new rod is placed on the placement groove and fixed by the hoop 2, and then the second cylinder 23 is shortened to drive the rack rod 22 to move. At this time, the limit rod 19 blocks the right side of the slider 17, so the gear 16 will rotate directly at this time, and then the transfer rod 15 drives d to rotate ninety degrees to a horizontal state. When it is about to rotate to ninety degrees, the side wall of the forming mold 12 will contact the push plate 24 and compress the third spring 25. The compression of the third spring 25 can make the push plate 24 block the right side wall of the forming mold 12 to prevent the forming mold 12 and the transfer rod 15 from shifting due to the inertia of rotation. When the gear 16 rotates ninety degrees, the end of the L-shaped rod 21 will press down the limit rod 19 to make it drop to a position lower than the bottom end of the slider 17. At this time, as the second cylinder 23 is shortened, the transfer rod 15, the slider 17 and the forming mold 12 will move to the right to a position that fits the side wall of the hoop 2, and then the stamping rod 4 can stamp again.

[0069] The conversion group includes a third cylinder 26 , which is fixedly connected between the machine body 1 and the support 7 .

[0070] like Figure 3 and Figure 4 As shown:

[0071] The extension and retraction of the third cylinder 26 drives the support member 7 to slide inside the machine body 1, thereby moving the two stoppers 28 and moving the two forming dies 12 forward and backward.

[0072] The bottom end of the pressure ring 8 is provided with a universal wheel 10 .

[0073] like Figure 4 As shown:

[0074] The universal wheel 10 can reduce the friction between the pressure ring 8 and the top plate 13 when the front and rear positions of the support member 7 change.

[0075] The slider 17 is rotatably connected with a roller 27 .

[0076] like Fig.11 As shown:

[0077] The roller 27 reduces the resistance of the slider 17 when sliding in the slide groove 18 .

[0078] The top of the pressure ring 8 is glued with a rubber layer.

[0079] The rubber layer is prior art and is therefore not specifically shown in the figure. It is used to seal the bottom wall of the forming mold 12 when the forming mold 12 contacts the pressure ring 8, and then place cooling oil between the bottom of the forming mold 12 and the pressure ring 8.

[0080] The guide group includes a plurality of guide posts 29 fixedly connected to the forming end 5 . The guide posts 29 are slidably connected to the punching rod 4 . A fourth spring 30 is fixedly connected between the guide posts 29 and the side wall of the punching rod 4 .

[0081] like Figure 2 as well as Fig.12 As shown:

[0082] The port of the inner wall of the forming mold 12 is tapered. When the forming end 5 contacts the tapered inner wall of the forming mold 12, the position of the forming mold 12 is adjusted while the forming end 5 moves, so that the forming mold 12 can slide along the transfer rod 15, so that the inner wall of the forming mold 12 can be coaxial with the forming end 5, thereby facilitating the insertion of the forming end 5.

Claims

1. A double-cooling bolt forming die, comprising a body (1), wherein a placement slot for placing a metal rod is provided at the top of the body (1), punching rods (4) are slidably connected to the left and right sides above the body (1), and a guide group is provided at the end of the punching rod (4), characterized in that: The punching rod (4) is provided with a forming end (5), a hoop (2) is provided above the placement groove, the top of the hoop (2) is fixedly connected to a first cylinder (3), the first cylinder (3) is fixedly connected to the top of the machine body (1), the left and right sides of the hoop (2) are provided with forming dies (12), the left and right sides of the machine body (1) are provided with cooling groups and material transfer groups, and the guide group is used to guide the forming end (5) and the forming die (12); The cooling group comprises a blowing rod (6) and a support member (7), the support member (7) being slidably connected to the machine body (1), a conversion group being arranged on one side of the support member (7), the conversion group being used for the support member (7) to slide forward and backward along the machine body (1), a stopper (28) being fixedly connected to both the front and rear sides of the top of the support member (7), the blowing rod (6) being fixedly connected to the molding end (5), two cavities being provided on the support member (7), the interiors of the two cavities being filled with cooling oil, and the interiors of the two cavities being slidably connected to a pressure ring (8), the bottom end of the pressure ring (8) extends to the bottom of 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 (11) is slidably connected inside the pressure ring (8), the diameter of the partition (11) is the same as the inner diameter of the forming die (12), a top plate (13) is commonly arranged below the two pressure rings (8), the top plate (13) is fixedly connected to the punching rod (4), the top plate (13) is inclined and its top end extends horizontally to one side; The material transfer group comprises a notch (14) formed on the forming die (12), the notch (14) being slidably connected to a transfer rod (15), a drive group being arranged below the transfer rod (15), the drive group being used to transfer the forming die (12) from above the pressure ring (8) to one side of the hoop (2).

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

3. The double-cooling bolt forming mold according to claim 1, characterized in that: The driving group comprises 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 slide groove (18); the slide groove (18) is provided on the machine body (1); a limit rod (19) is provided below the slider (17); the limit rod (19) is slidably connected to the machine body (1); a second spring (19) is fixedly connected between the limit rod (19) and the inner wall of the machine body (1). 20), when the slider (17) is at the leftmost side of the slide groove (18), the limit 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), and the L-shaped rod (21) is used to press down the limit rod (19), and a rack rod (22) is meshed above the gear (16), and the rack rod (22) is fixedly connected to a second cylinder (23), and the second cylinder (23) is fixedly connected to the machine body (1).

4. A double-cooling bolt forming die according to claim 3, characterized in that: A push plate (24) is provided 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. The double-cooling bolt forming mold according to claim 1, characterized in that: The conversion group comprises a third cylinder (26), and the third cylinder (26) is fixedly connected between the machine body (1) and the support member (7).

6. The double-cooling bolt forming mold according to claim 1, characterized in that: The bottom end of each of the pressure rings (8) is provided with a universal wheel (10).

7. The double-cooling bolt forming mold according to claim 1, characterized in that: The slider (17) is rotatably connected to a roller (27).

8. The double-cooling bolt forming die according to claim 1, characterized in that: The top end of the pressure ring (8) is glued with a rubber layer.

9. The double-cooling bolt forming die according to claim 1, characterized in that: The guide group comprises a plurality of guide columns (29) fixedly connected to the forming end (5); the guide columns (29) are slidably connected to the punching rod (4); and a fourth spring (30) is fixedly connected between the guide columns (29) and the side wall of the punching rod (4).

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