Heat treatment process of high-strength stud

Abstract

The heat treatment process comprises the following steps that one end of the stud is in threaded connection with a hexagonal thread sleeve, and after connection is completed, the hexagonal thread sleeve is aligned with a hexagonal hole and placed in the hexagonal hole; a first sliding plate and a second sliding plate are moved into a heat treatment chamber, the second sliding plate is moved to a sinking plate, a hexagonal thread sleeve and a stud are descended, and the stud is uniformly heated under the cooperation of a through hole and a gap between the first sliding plate and the second sliding plate; according to the device, the hexagonal thread sleeve and the stud can be ensured to stably descend, the hexagonal thread sleeve and the stud cannot be shifted or fall to the position of the hexagonal hole, after the hexagonal thread sleeve and the stud descend, the conveying chain stops running, and under the cooperation of the through hole and the gap between the first sliding plate and the second sliding plate, the conveying chain can stably descend. Therefore, the double-end bolt can be uniformly heated, and the thread of the double-end bolt cannot be impacted.

Description

Technical Field

[0001] The present invention belongs to the technical field of bolt production, and particularly relates to a heat treatment process for high-strength double-headed bolts. Background Art

[0002] A high-strength double-headed bolt is a fastener with threads at both ends and a smooth rod or thickened structure in the middle. It is made of alloy steel and reaches high-strength standards of 8.8, 10.9, or 12.9 levels through heat treatment, and has high pre-tightening force, fatigue resistance, and shear resistance.

[0003] The heat treatment of double-headed bolts usually includes quenching and tempering processes. By rapidly cooling after high-temperature heating, the hardness and strength are improved, and then stress relief and toughness balance are achieved through medium- and low-temperature tempering. With surface treatment to enhance corrosion resistance, the bolts finally reach high-strength standards such as 8.8, 10.9, or 12.9 levels, ensuring their fatigue resistance and durability in high-load and vibrating environments.

[0004] The patent application with the patent publication number CN118006879A discloses a bolt heat treatment device and processing method, which allows bolts to be placed separately to avoid mutual collision during heat treatment, and enables the heating device in the shell to uniformly heat the bolts. Although the above device can uniformly heat the bolts, the way to uniformly heat the bolts is achieved by pushing the push shaft upward through the push block to make the bolts repeatedly lift and lower in the placement holes of the bolt placement structure. When the bolts are in a high-temperature state after high-temperature heating, the strength of the bolts will decrease, and at this time, the thread part of the bolts is relatively fragile, resulting in the risk that the threads of the bolts hit the corresponding placement hole positions of the bolt placement structure during repeated lifting and lowering. The threads will be deformed or damaged when hit, thus deteriorating the quality of the produced bolts and resulting in a large number of unqualified products. Summary of the Invention

[0005] One of the purposes of the present invention is to solve the problem that the threads of bolts are hit during uniform heating of bolts in the prior art;

[0006] Another purpose of the present invention is to solve the problem that the cleanliness of the bolt placement structure cannot be guaranteed;

[0007] Another purpose of the present invention is to solve the problem that the waste residues generated during bolt heat treatment cannot be automatically cleaned; A heat treatment process for high-strength double-headed bolts is provided.

[0008] The purpose of the present invention can be achieved by the following technical solutions:

[0009] A heat treatment process for high-strength double-headed bolts includes the following steps:

[0010] S1: Threadedly connect a hexagonal sleeve to one end of the stud. After the connection is completed, align the hexagonal sleeve and place it into the hexagonal hole.

[0011] S2: Move the first slide plate and the second slide plate into the heat treatment chamber. Move the second slide plate onto the sinking plate, and lower the hexagonal sleeve and the stud. With the cooperation of the through hole and the gap between the first slide plate and the second slide plate, the stud is evenly heated.

[0012] S3: After the stud is heated, the conveyor chain drives the first slide plate and the second slide plate to move, causing the second slide plate to move up to the lower layer of the first M-shaped slide rail, preparing for the subsequent cleaning of the stud.

[0013] S4: Move the first gear closer to the rack and engage it with the rack. The rack drives the first gear to rotate. The rotation of the first gear drives the toothed ring to rotate. The rotation of the toothed ring drives the first turntable and the second turntable to rotate. The air duct blows the first slide plate, the second slide plate, the first turntable, and the second turntable in all directions, and the waste residue can be blown to the bottom of the heat treatment chamber.

[0014] S5: During the operation of the conveyor chain, it drives the second gear to rotate. The second gear drives the first sprocket to rotate. With the cooperation of the second sprocket and the synchronous chain, it can drive the rotating rod and the first bevel gear to rotate. The rotation of the first bevel gear drives the second bevel gear and the reciprocating lead screw to rotate. During the rotation of the reciprocating lead screw, it drives the push plate to move reciprocally outside the reciprocating lead screw. During the reciprocating movement of the push plate, the waste residue can be pushed into the collection box below both ends of the heat treatment chamber for collection.

[0015] S6: When the first slide plate and the second slide plate are conveyed to the position corresponding to the second M-shaped slide rail, the electric cylinder and the second M-shaped slide rail are used to move the stud into the cleaning tank. With the cooperation of the knocking mechanism, the cleaning of the stud can be quickly completed. After the cleaning of the stud is completed, continue to convey the first slide plate and the second slide plate to complete the subsequent heat treatment operation.

[0016] S7: Repeat all the above steps to perform the heat treatment of a new batch of studs.

[0017] Preferably, in the step S2, through the cooperation of the conveyor chain, the first slide plate and the second slide plate are moved into the heat treatment chamber. During the movement of the second slide plate, it will approach the falling edge. With the cooperation of the second inclined surface, the falling edge can enable the second slide plate to move smoothly onto the sinking plate. After the second slide plate descends, it will move away from the first slide plate. Since the second slide plate fixes the hexagonal nut sleeve and the double-headed bolt, during the descent of the second slide plate, the hexagonal nut sleeve and the double-headed bolt will descend synchronously with the second slide plate, and the second slide plate and the hexagonal nut sleeve and the double-headed bolt are in a relatively static state. Thus, when the second slide plate moves and descends smoothly, it can ensure that the hexagonal nut sleeve and the double-headed bolt descend smoothly, and will not cause the hexagonal nut sleeve and the double-headed bolt to shift or fall towards the position of the hexagonal hole. After the hexagonal nut sleeve and the double-headed bolt descend, the conveyor chain stops running. With the cooperation of the through hole and the gap between the first slide plate and the second slide plate, the double-headed bolt can be evenly heated.

[0018] Preferably, in the step S2, the length of the long side of the first slide plate is greater than the length of the long side of the second slide plate, the distance from the upper end of the falling edge to the upper surface of the sinking plate is greater than the height of the hexagonal nut sleeve, and the protruding length of the first positioning post is greater than the distance from the upper end of the falling edge to the upper surface of the sinking plate.

[0019] Preferably, in the step S3, after the double-headed bolt is heated, the conveyor chain is started again, and the conveyor chain continues to run to drive the first slide plate and the second slide plate to continue moving. During the movement of the second slide plate, the first inclined surface will contact the rising edge. With the cooperation of the first inclined surface and the rising edge, the second slide plate can move smoothly and smoothly up to the lower layer of the first M-shaped slide rail, preparing for the subsequent cleaning of the double-headed bolt.

[0020] Preferably, in the steps S2 and S3, both the falling edge and the rising edge form an angle of 45° with the horizontal plane, and both the first inclined surface and the second inclined surface form an angle of 45° with the horizontal plane.

[0021] Preferably, in the step S4, the length of the rack is equal to half of the circumference of the first turntable, the distance from the rack to the upper end of the rising edge is greater than the width of the first slide plate, and the length of the air duct is from the upper end of the falling edge to the end of the rack far from the falling edge.

[0022] Preferably, in the step S4, during the process of the conveyor chain driving the first slide plate and the second slide plate to continue moving, the first gear moves closer to the rack and meshes with the rack. After the first gear meshes with the rack, during the continuous movement of the first slide plate, the rack will drive the first gear to rotate. The rotation of the first gear drives the toothed ring to rotate, and the rotation of the toothed ring drives the first turntable to rotate. Under the action of the second positioning post, the rotation of the first turntable drives the second turntable to rotate. Since the length of the rack is equal to half of the circumference of the first turntable, when the first slide plate moves to the end of the rack, the first turntable and the second turntable will rotate 180°. Since the length of the air duct is from the upper end of the falling side to the end of the rack away from the falling side, during the rotation of the first turntable and the second turntable, the air duct can blow the first slide plate, the second slide plate, the first turntable and the second turntable in all directions, so that the waste residues falling on the first slide plate, the second slide plate, the first turntable and the second turntable can be blown to the bottom of the heat treatment chamber.

[0023] Preferably, in the step S6, when the conveyor chain conveys the first slide plate and the second slide plate to the position corresponding to the second M-shaped slide rail, the conveyor chain will stop running, and the electric cylinder will start running. The electric cylinder drives the second M-shaped slide rail to descend, so that the first slide plate and the second slide plate enter the cleaning pool. With the cooperation of the knocking mechanism, the impurities outside the double-headed bolt can be shaken off, and the cleaning of the double-headed bolt can be completed quickly. After the cleaning of the double-headed bolt is completed, the electric cylinder is started again to drive the second M-shaped slide rail to rise. When the second M-shaped slide rail rises to correspond to the first M-shaped slide rail and the third M-shaped slide rail, the electric cylinder stops running. At this time, the conveyor chain is started again to make the conveyor chain continue to run, and the first slide plate and the second slide plate can be conveyed continuously to complete the subsequent heat treatment operation.

[0024] The beneficial effects of the present invention:

[0025] When heat-treating the double-headed bolt, through the cooperation of the conveyor chain, the first slide plate and the second slide plate are moved into the heat treatment chamber. During the movement of the second slide plate, it will approach the falling side. With the cooperation of the second inclined surface, the second slide plate can be smoothly moved onto the sinking plate. After the second slide plate descends, it will move away from the first slide plate. Since the second slide plate fixes the hexagonal nut sleeve and the double-headed bolt, during the descent of the second slide plate, the hexagonal nut sleeve and the double-headed bolt will descend synchronously with the second slide plate, and the second slide plate, the hexagonal nut sleeve and the double-headed bolt are in a relatively static state. Therefore, when the second slide plate moves down smoothly, it can ensure that the hexagonal nut sleeve and the double-headed bolt move down smoothly, and will not cause the hexagonal nut sleeve and the double-headed bolt to shift or fall towards the hexagonal hole. After the hexagonal nut sleeve and the double-headed bolt descend, the conveyor chain stops running. With the cooperation of the through hole and the gap between the first slide plate and the second slide plate, the double-headed bolt can be evenly heated, and the threads of the double-headed bolt will not be impacted.

[0026] During the process of the conveyor chain driving the first slide plate and the second slide plate to continue moving, the first gear moves closer to the rack and meshes with the rack. After the first gear meshes with the rack, during the continuous movement of the first slide plate, the rack will drive the first gear to rotate. The rotation of the first gear drives the toothed ring to rotate, and the rotation of the toothed ring drives the first turntable to rotate. Under the action of the second positioning post, the rotation of the first turntable drives the second turntable to rotate. Since the length of the rack is equal to half of the circumference of the first turntable, when the first slide plate moves to the end of the rack, the first turntable and the second turntable will rotate 180°. Since the length of the air duct is from the upper end of the falling side to the end of the rack away from the falling side, during the rotation of the first turntable and the second turntable, the air duct can blow the first slide plate, the second slide plate, the first turntable and the second turntable in all directions, so that the waste residues falling on the first slide plate, the second slide plate, the first turntable and the second turntable can be blown to the bottom of the heat treatment chamber, ensuring the cleanliness of the first slide plate, the second slide plate, the first turntable and the second turntable.

[0027] During the operation of the conveyor chain, it will drive the second gear to rotate. The rotation of the second gear drives the first sprocket to rotate. With the cooperation of the second sprocket and the synchronous chain, it can drive the rotating rod and the first bevel gear to rotate. The rotation of the first bevel gear drives the second bevel gear and the reciprocating lead screw to rotate. During the rotation of the reciprocating lead screw, it will drive the push plate to move reciprocally outside the reciprocating lead screw. The push plate will move stably under the action of the positioning rod and will not deflect. During the reciprocating movement of the push plate, the waste residues can be pushed into the collection box below both ends of the heat treatment chamber for collection, which can automatically clean the waste residues, avoid the accumulation of waste residues in the heat treatment chamber, ensure the cleanliness of the heat treatment chamber, reduce the manual cleaning operation, improve the efficiency and reduce the trouble. Description of the Drawings

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] Figure 1 is a perspective view of the present invention;

[0030] Figure 2 is a sectional perspective view of the present invention;

[0031] Figure 3 is a front sectional view of the present invention;

[0032] Figure 4 is a rear sectional view of the present invention;

[0033] Figure 5 is a perspective view of the first slide plate in the present invention;

[0034] Figure 6 is a front view of the first slide plate in the present invention;

[0035] Figure 7 is a sectional view of the first sliding plate in the present invention;

[0036] Figure 8 is a perspective view of the reciprocating lead screw in the present invention;

[0037] Figure 9 is a schematic diagram after the second sliding plate descends in the present invention.

[0038] In the figure: 1. Heat treatment chamber; 2. First sliding plate; 3. Tooth ring; 4. Synchronous plate; 5. Falling edge; 6. Air duct; 7. Second gear; 8. Cleaning pool; 9. Third M-shaped slide rail;

[0039] 11. First M-shaped slide rail;

[0040] 21. Second sliding plate; 22. First positioning post; 23. Anti-detachment block; 24. First turntable; 25. Hexagonal hole; 26. Second turntable; 27. Through hole; 28. Second positioning post;

[0041] 31. First gear; 32. Rack;

[0042] 41. Outer shell; 42. Spring; 43. Damper; 44. Transmission chain;

[0043] 52. Sinking plate; 52. Rising edge; 53. First inclined surface; 54. Second inclined surface;

[0044] 61. Delivery pipe; 62. Fan;

[0045] 701. First fixing plate; 71. First sprocket; 711. Second sprocket; 712. Synchronous chain; 713. Second fixing plate; 72. Rotating rod; 721. Third fixing plate; 73. First bevel gear; 74. Second bevel gear; 75. Reciprocating lead screw; 76. Pushing plate; 77. Positioning plate; 78. Positioning rod; 79. Collection box;

[0046] 81. Electric cylinder; 82. Second M-shaped slide rail. Detailed implementation manners

[0047] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0048] Please refer to Figure 1 - Figure 5As shown in the figure, a heat treatment process for high-strength double-headed bolts includes a heat treatment chamber 1 for heating the double-headed bolts.

[0049] In the middle of the inner wall of the heat treatment chamber 1, symmetrically arranged first M-shaped sliding rails 11 are connected, and the first M-shaped sliding plate penetrates through both ends of the heat treatment chamber 1. The first M-shaped sliding rails 11 are used to support the first sliding plate 2 and the second sliding plate 21, and guide the moving positions of the first sliding plate 2 and the second sliding plate 21.

[0050] Between the first M-shaped sliding rails 11, a first sliding plate 2 and a second sliding plate 21 are respectively arranged. The first sliding plate 2 is slidably connected to the upper layer of the first M-shaped sliding rail 11, and the second sliding plate 21 is slidably connected to the lower layer of the first M-shaped sliding rail 11. By this setting method, interference between the first sliding plate 2 and the second sliding plate 21 can be avoided.

[0051] Please refer to Figure 7 As shown in the figure, the length of the long side of the first sliding plate 2 is greater than the length of the long side of the second sliding plate 21. By this setting method, it can be ensured that the lower surface of the first sliding plate 2 can fit with the upper surface of the second sliding plate 21, so as to facilitate the placement of the hexagonal sleeve and the double-headed bolt and ensure the position of the hexagonal sleeve.

[0052] Please refer to Figure 5 As shown in the figure, at the four corners of the upper surface of the second sliding plate 21, first positioning columns 22 are respectively connected. The first positioning columns 22 are slidably connected to the first sliding plate 2. The first positioning columns 22 are used to connect the first sliding plate 2 and the second sliding plate 21, so that the positions of the first sliding plate 2 and the second sliding plate 21 are kept consistent in the horizontal direction and can only be adjusted in the vertical direction.

[0053] An anti-detachment block 23 is connected to the upper end of the first positioning column 22. The anti-detachment block 23 is used to prevent the first sliding plate 2 from falling off the second sliding plate 21.

[0054] Please refer to Figure 5 - Figure 7 As shown in the figure, a first turntable 24 is rotatably connected inside the first sliding plate 2, and a second turntable 26 is rotatably connected inside the second sliding plate 21. The first turntable 24 and the second turntable 26 are used to assist in cleaning the waste residue generated during the heating of the double-headed bolts.

[0055] A plurality of uniformly arranged hexagonal holes 25 are formed in the first turntable 24. The hexagonal holes 25 are used in cooperation with the hexagonal sleeve. With the support of the second sliding plate 21, the hexagonal sleeve and the double-headed bolt can be placed into the hexagonal holes 25, and the position of the double-headed bolt can be fixed.

[0056] It should be noted here that when heat-treating the stud bolt, since the stud bolt cannot stand vertically under its own action, by setting a hexagonal sleeve, one end of the stud bolt is thread-fitted with the hexagonal sleeve, and the stud bolt can stand vertically. With the cooperation of the hexagonal sleeve, the stud bolt is placed into the hexagonal hole 25, and the position of the stud bolt can be limited.

[0057] In specific use, a hexagonal sleeve is thread-connected to one end of the stud bolt. After the connection is completed, the hexagonal sleeve is aligned with the hexagonal hole 25 and placed in. After being placed in, the hexagonal sleeve contacts the upper surface of the second turntable 26, so that the hexagonal sleeve and the stud bolt can stand vertically and be stable, and the stud bolt can be ensured to be heated evenly during subsequent heat treatment.

[0058] A plurality of uniformly arranged through holes 27 are formed in the upper surface of the second turntable 26. The through holes 27 are used for dropping the waste residue generated when the stud bolt is heated and enabling the heat to directly contact the stud bolt, thereby improving the heating effect.

[0059] A plurality of uniformly arranged second positioning columns 28 are connected to the position of the upper surface of the second turntable 26 close to the outside. The second positioning columns 28 are slidably connected to the first turntable 24. The second positioning columns 28 are used to connect the first turntable 24 and the second turntable 26, so that the first turntable 24 and the second turntable 26 can rotate synchronously.

[0060] Symmetrically arranged synchronous plates 4 are connected to the position of the upper surface of the first slide plate 2 close to the inner wall of the heat treatment chamber 1. The synchronous plates 4 are used to assist the first slide plate 2 and the second slide plate 21 to enter the cleaning pool 8.

[0061] An outer shell 41 is arranged outside the synchronous plate 4. The synchronous plate 4 is slidably connected in the outer shell 41. The outer shell 41 is used to accommodate the synchronous plate 4 and at the same time is used to assist in moving the first slide plate 2.

[0062] A plurality of uniformly arranged springs 42 are connected between the synchronous plate 4 and the outer shell 41. The springs 42 are used to reset the synchronous plate 4.

[0063] A plurality of uniformly arranged dampers 43 are connected between the synchronous plate 4 and the outer shell 41 at the positions corresponding to the springs 42. The dampers 43 are located inside the springs 42. The dampers 43 are used to slow down the rebound of the springs 42.

[0064] Please refer to Figure 1 - Figure 4 As shown in the figure, a transmission chain is penetratedly arranged at the position corresponding to the outer shell 41 in the heat treatment chamber 1. The outer shell 41 is connected to the transmission chain. The transmission chain is used to drive the outer shell 41 to move.

[0065] Below the first M-shaped slide rail 11, corresponding to the inside of the heat treatment chamber 1 and near the first slide plate 2, a falling edge 5, a sinking plate, and a rising edge 52 are connected in sequence. The falling edge 5 is used to lower the second slide plate 21, so that the second slide plate 21 moves away from the first slide plate 2. The sinking plate is used to support the second slide plate 21 to make the second slide plate 21 stable. The rising edge 52 is used to raise the second slide plate 21, so that the second slide plate 21 approaches the first slide plate 2.

[0066] Please refer to Figure 3 and Figure 6 As shown, both the falling edge 5 and the rising edge 52 form a 45° angle with the horizontal plane. A first inclined surface 53 is provided below one end of the second slide plate 21 close to the heat treatment chamber 1. The first inclined surface 53 is used in cooperation with the rising edge 52. A second inclined surface 54 is provided below the other end of the second slide plate 21 far from the heat treatment chamber 1. The second inclined surface 54 is used in cooperation with the falling edge 5. Both the first inclined surface 53 and the second inclined surface 54 form a 45° angle with the horizontal plane. Through the cooperation of the first inclined surface 53 and the rising edge 52 and the cooperation of the second inclined surface 54 and the falling edge 5, when the second slide plate 21 rises and falls, friction can be reduced, making the rising and falling of the second slide plate 21 smoother and more stable.

[0067] Please refer to Figure 3 and Figure 4 As shown, the distance from the upper end of the falling edge 5 to the upper surface of the sinking plate is greater than the height of the hexagonal nut. By this setting method, after the second slide plate 21 descends onto the sinking plate, it can ensure that one end of the hexagonal nut and the double-headed bolt connected to the hexagonal nut is not blocked, enabling the double-headed bolt to be heated evenly.

[0068] Please refer to Figure 9 As shown, the protruding length of the first positioning post 22 is greater than the distance from the upper end of the falling edge 5 to the upper surface of the sinking plate. By this setting method, after the hexagonal nut and the double-headed bolt descend, it can ensure that the double-headed bolt corresponds to the hexagonal hole 25 and prevent the double-headed bolt from falling down.

[0069] In actual use, when heat-treating the double-headed bolt, with the cooperation of the conveyor chain 44, the first slide plate 2 and the second slide plate 21 are moved into the heat treatment chamber 1. During the movement of the second slide plate 21, it will approach the falling edge 5. With the cooperation of the second inclined surface 54 of the falling edge 5, the second slide plate 21 can be smoothly moved onto the sinking plate. After the second slide plate 21 descends, it will move away from the first slide plate 2. Since the second slide plate 21 fixes the hexagonal nut and the double-headed bolt, during the descent of the second slide plate 21, the hexagonal nut and the double-headed bolt will descend synchronously with the second slide plate 21, and the second slide plate 21 and the hexagonal nut and the double-headed bolt are in a relatively static state. Thus, when the second slide plate 21 is smoothly moved and descended, it can ensure that the hexagonal nut and the double-headed bolt descend smoothly without causing the hexagonal nut and the double-headed bolt to shift or fall towards the position of the hexagonal hole 25. After the hexagonal nut and the double-headed bolt descend, the conveyor chain 44 stops running. With the cooperation of the through hole 27 and the gap between the first slide plate 2 and the second slide plate 21, the double-headed bolt can be evenly heated, and the threads of the double-headed bolt will not be impacted. After the double-headed bolt is heated, waste residues will be generated. With the cooperation of the through hole 27, part of the waste residues will fall to the bottom of the heat treatment chamber 1 through the through hole 27. After the double-headed bolt is heated, the conveyor chain 44 is started again, and the conveyor chain 44 continues to run to drive the first slide plate 2 and the second slide plate 21 to continue moving. During the movement of the second slide plate 21, the first inclined surface 53 will contact the rising edge 52. With the cooperation of the first inclined surface 53 and the rising edge 52, the second slide plate 21 can be smoothly and smoothly moved up to the lower layer of the first M-shaped slide rail 11 to prepare for the subsequent cleaning of the double-headed bolt. If the second slide plate 21 is in a state of being away from the first slide plate 2, during the cleaning of the double-headed bolt, when using the knocking mechanism to knock the first slide plate 2 and the second slide plate 21, it will cause the hexagonal nut and the hexagonal hole 25 to be misaligned. When discharging the double-headed bolt, it will cause trouble and cause the upper part of the double-headed bolt to shake in the hexagonal hole 25, resulting in impact and damage to the double-headed bolt, resulting in unqualified double-headed bolts produced.

[0070] Please refer to Figure 1 - Figure 5 As shown, a rack 32 is provided at a position inside the heat treatment chamber 1 close to the rising edge 52. The rack 32 is connected above the first M-shaped slide rail 11 and is used to assist in rotating the first turntable 24 and the second turntable 26.

[0071] The length of the rack 32 is equal to half of the circumference of the first turntable 24. With this setting method, the first turntable 24 and the second turntable 26 can rotate 180°, so as to ensure that the waste residue generated during the heat treatment of the stud bolts can be blown off from the first slide plate 2, the second slide plate 21, the first turntable 24 and the second turntable 26 by the air duct 6, so that the waste residue can be cleaned, and the cleanliness of the first slide plate 2, the second slide plate 21, the first turntable 24 and the second turntable 26 can be guaranteed.

[0072] The length of the rack 32 from the upper end of the rising edge 52 is greater than the width of the wide side of the first slide plate 2. With this setting method, it can be ensured that the first slide plate 2 and the second slide plate 21 are stable before the first turntable 24 and the second turntable 26 rotate, and the stability of the stud bolts can be ensured.

[0073] A toothed ring 3 is connected to the outer side above the first turntable 24. A first gear 31 is rotatably connected to the position corresponding to the toothed ring 3 and the rack 32 above the first slide plate 2. The first gear 31 meshes with the toothed ring 3, and the first gear 31 meshes with the rack 32 intermittently. When the first slide plate 2 moves to the position of the rack 32, the first gear 31 meshes with the rack 32. When the first slide plate 2 continues to move, the first gear 31 will be driven to rotate under the action of the rack 32, thereby driving the toothed ring 3, the first turntable 24 and the second turntable 26 to rotate, so that the first turntable 24 and the second turntable 26 can rotate 180°.

[0074] An air duct 6 is connected to the inner wall of the heat treatment chamber 1 at the position corresponding to the falling edge 5 and the rack 32. The air duct 6 is used to blow off the waste residue on the first slide plate 2, the second slide plate 21, the first turntable 24 and the second turntable 26.

[0075] The length of the air duct 6 is from the upper end of the falling edge 5 to the end of the rack 32 far from the falling edge 5. With this setting method, it is ensured that the waste residue can be completely blown off.

[0076] A blower 62 is connected to the outside of the heat treatment chamber 1 at the position corresponding to the air duct 6. A delivery pipe 61 is connected between the air duct 6 and the blower 62. The blower 62 and the delivery pipe 61 cooperate to send air into the air duct 6.

[0077] During specific use, during the process of the conveying chain 44 driving the first slide plate 2 and the second slide plate 21 to continue moving, the first gear 31 moves closer to the rack 32 and meshes with the rack 32. After the first gear 31 meshes with the rack 32, during the continuous movement of the first slide plate 2, the rack 32 will drive the first gear 31 to rotate. The rotation of the first gear 31 drives the toothed ring 3 to rotate, and the rotation of the toothed ring 3 drives the first turntable 24 to rotate. Under the action of the second positioning post 28, the rotation of the first turntable 24 drives the second turntable 26 to rotate. Since the length of the rack 32 is equal to half of the circumference of the first turntable 24, when the first slide plate 2 moves to the end of the rack 32, the first turntable 24 and the second turntable 26 will rotate 180°. Since the length of the air duct 6 is from the upper end of the falling edge 5 to the end of the rack 32 away from the falling edge 5, during the rotation of the first turntable 24 and the second turntable 26, the air duct 6 can blow the first slide plate 2, the second slide plate 21, the first turntable 24, and the second turntable 26 in all directions, so that the waste residues falling on the first slide plate 2, the second slide plate 21, the first turntable 24, and the second turntable 26 can be blown to the bottom of the heat treatment chamber 1, ensuring the cleanliness of the first slide plate 2, the second slide plate 21, the first turntable 24, and the second turntable 26.

[0078] Please refer to Figure 2 - Figure 4 and Figure 8 As shown, a second gear 7 is arranged below the conveying chain 44 corresponding to the end of the heat treatment chamber 1 far from the first slide plate 2, and the second gear 7 is driven to rotate by the conveying chain 44.

[0079] A first fixing plate 701 is connected to the side of the heat treatment chamber 1 corresponding to the position of the second gear 7. The second gear 7 is rotatably connected to the first fixing plate 701, and the first fixing plate 701 is used to fix the position of the second gear 7.

[0080] A first sprocket 71 is connected to the middle of the side of the second gear 7 close to the outside of the heat treatment chamber 1. A second sprocket 711 is arranged below the first sprocket 71. A synchronous chain 712 is rotatably connected between the first sprocket 71 and the second sprocket 711. With the cooperation of the first sprocket 71, the second sprocket 711 and the synchronous chain 712, the rotating rod 72 can be driven to rotate.

[0081] A second fixing plate 713 is connected to the side of the heat treatment chamber 1 corresponding to the position of the second sprocket 711. The second sprocket 711 is rotatably connected to the second fixing plate 713, and the second fixing plate 713 is used to fix the position of the second sprocket 711

[0082] A rotating rod 72 is connected to the middle of the side of the second sprocket 711 close to the second gear 7, and the rotating rod 72 is used to assist in driving the reciprocating lead screw 75 to rotate.

[0083] One side of the heat treatment chamber 1 corresponds to one end of the rotating rod 72 far from the second sprocket 711, and a third fixing plate 721 is connected. The rotating rod 72 is rotatably connected to the third fixing plate 721, and the third fixing plate 721 is used to fix the position of the rotating rod 72.

[0084] A first bevel gear 73 is connected to the middle of the rotating rod 72. A second bevel gear 74 is engaged with the first bevel gear 73 near the heat treatment chamber 1. A reciprocating lead screw 75 is connected to the middle of the side of the second bevel gear 74 far from the first bevel gear 73. Through the cooperation of the first bevel gear 73 and the second bevel gear 74, the reciprocating lead screw 75 can be driven to rotate.

[0085] A push plate is threadedly connected to the outside of the reciprocating lead screw 75. The push plate is used to push the waste residue falling to the bottom of the heat treatment chamber 1 out of the heat treatment chamber 1.

[0086] Positioning plates 77 are respectively connected to the two ends of the heat treatment chamber 1 corresponding to the position of the bidirectional lead screw. The two ends of the bidirectional lead screw are rotatably connected to the positioning plates 77, and the positioning plates 77 are used to fix the position of the bidirectional lead screw.

[0087] A positioning rod 78 is connected between the positioning plates 77 corresponding to the position of the push plate. The push plate is slidably connected to the positioning rod 78. The positioning rod 78 is used to limit the position of the push plate to prevent the push plate from deflecting during the movement.

[0088] Collection boxes 79 are arranged below both ends of the heat treatment chamber 1. The collection boxes 79 are used to collect waste residue.

[0089] In specific use, during the operation of the conveyor chain 44, the second gear 7 will be driven to rotate. The rotation of the second gear 7 drives the first sprocket 71 to rotate. With the cooperation of the second sprocket 711 and the synchronous chain 712, the rotating rod 72 and the first bevel gear 73 can be driven to rotate. The rotation of the first bevel gear 73 drives the second bevel gear 74 and the reciprocating lead screw 75 to rotate. During the rotation of the reciprocating lead screw 75, the push plate will be driven to reciprocate on the outside of the reciprocating lead screw 75. Under the action of the positioning rod 78, the push plate will move stably without deflection. During the reciprocating movement of the push plate, the waste residue can be pushed into the collection boxes 79 below both ends of the heat treatment chamber 1 for collection, which can automatically clean the waste residue, avoid the accumulation of waste residue in the heat treatment chamber 1, ensure the cleanliness of the heat treatment chamber 1, reduce the manual cleaning operation, improve the efficiency and reduce the trouble.

[0090] Please refer to Figure 1 - Figure 4 As shown in the figure, second M-shaped slide rails 82 are connected to the ends of the first M-shaped slide rails 11 far from the first slide plate 2. The second M-shaped slide rails 82 are used to support the first slide plate 2 and the second slide plate 21 and guide one end of the first slide plate 2 and the second slide plate 21.

[0091] In the middle below the second M-shaped slide rail 82, an electric cylinder 81 is connected. The electric cylinder 81 is used to drive the second M-shaped slide rail 82 to lift and lower.

[0092] Outside the electric cylinder 81, a cleaning pool 8 is arranged. The electric cylinder 81 is installed in the cleaning pool 8. The cleaning pool 8 is used to clean the double-headed bolts after heat treatment.

[0093] It should be noted here that by arranging a knocking mechanism in the cleaning pool 8 to knock on the first slide plate 2 and the second slide plate 21, the impurities on the outside of the double-headed bolts can be shaken off, and the cleaning efficiency can be improved. The patent application with the patent publication number CN118006879A discloses a bolt heat treatment device and processing method. The knocking mechanism can adopt the mechanism that makes the bolt placement structure vibrate in the above patent.

[0094] At one end of the second M-shaped slide rail 82 away from the first M-shaped slide rail 11, a third M-shaped slide rail 9 is arranged. One end of the third M-shaped slide rail 9 close to the cleaning pool 8 is connected to the cleaning pool 8. The third M-shaped slide rail 9 is used to support the first slide plate 2 and the second slide plate 21 and guide one end of the first slide plate 2 and the second slide plate 21.

[0095] The first M-shaped slide rail 11, the second M-shaped slide rail 82, and the third M-shaped slide rail 9 have the same shape and size. Through this setting method, it is ensured that the first slide plate 2 and the second slide plate 21 can be completely guided.

[0096] In specific use, when the conveyor chain 44 conveys the first slide plate 2 and the second slide plate 21 to the position corresponding to the second M-shaped slide rail 82, the conveyor chain 44 will stop running, and the electric cylinder 81 will start running. The electric cylinder 81 drives the second M-shaped slide rail 82 to descend, so that the first slide plate 2 and the second slide plate 21 enter the cleaning pool 8. Through the cooperation of the knocking mechanism, the impurities on the outside of the double-headed bolts can be shaken off, and the cleaning of the double-headed bolts can be quickly completed. After the double-headed bolts are cleaned, the electric cylinder 81 is started again to drive the second M-shaped slide rail 82 to rise. After the second M-shaped slide rail 82 rises to correspond to the first M-shaped slide rail 11 and the third M-shaped slide rail 9, the electric cylinder 81 stops running. At this time, the conveyor chain 44 is started again to make the conveyor chain 44 continue to run, and then the first slide plate 2 and the second slide plate 21 can be continuously conveyed to complete the subsequent heat treatment operation.

[0097] A heat treatment process for high-strength double-headed bolts includes the following steps:

[0098] S1: Threadedly connect a hexagonal nut sleeve to one end of the double-headed bolt. After the connection is completed, align the hexagonal nut sleeve and place it into the hexagonal hole 25.

[0099] S2: Move the first slide plate 2 and the second slide plate 21 into the heat treatment chamber 1, move the second slide plate 21 onto the sinking plate, lower the hexagonal nut sleeve and the double-headed bolt. With the cooperation of the through hole 27 and the gap between the first slide plate 2 and the second slide plate 21, the double-headed bolt is evenly heated.

[0100] S3: After the double-headed bolt is heated, the conveyor chain 44 drives the first slide plate 2 and the second slide plate 21 to move, so that the second slide plate 21 moves up to the lower layer of the first M-shaped slide rail 11 to prepare for the subsequent cleaning of the double-headed bolt.

[0101] S4: Move the first gear 31 close to the rack 32 and engage with the rack 32. The rack 32 drives the first gear 31 to rotate. The rotation of the first gear 31 drives the toothed ring 3 to rotate. The rotation of the toothed ring 3 drives the first turntable 24 and the second turntable 26 to rotate. The air duct 6 blows the first slide plate 2, the second slide plate 21, the first turntable 24 and the second turntable 26 in all directions, and the waste residue can be blown to the bottom of the heat treatment chamber 1.

[0102] S5: During the operation of the conveyor chain 44, it drives the second gear 7 to rotate. The second gear 7 drives the first sprocket 71 to rotate. With the cooperation of the second sprocket 711 and the synchronous chain 712, it can drive the rotating rod 72 and the first bevel gear 73 to rotate. The rotation of the first bevel gear 73 drives the second bevel gear 74 and the reciprocating lead screw 75 to rotate. During the rotation of the reciprocating lead screw 75, it will drive the push plate to move reciprocally outside the reciprocating lead screw 75. During the reciprocating movement of the push plate, the waste residue can be pushed into the collection box 79 below both ends of the heat treatment chamber 1 for collection.

[0103] S6: When the first slide plate 2 and the second slide plate 21 are conveyed to the position corresponding to the second M-shaped slide rail 82, the double-headed bolt is moved into the cleaning pool 8 through the electric cylinder 81 and the second M-shaped slide rail 82. With the cooperation of the knocking mechanism, the cleaning of the double-headed bolt can be quickly completed. After the double-headed bolt is cleaned, continue to convey the first slide plate 2 and the second slide plate 21 to complete the subsequent heat treatment operation.

[0104] S7: Repeat all the above steps to perform the heat treatment of a new batch of double-headed bolts.

[0105] It should be noted that in this article, terms such as "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to such process, method, article or device.

[0106] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A heat treatment process for high-strength stud bolts, characterized in that: The following steps are involved: S1: A hexagonal screw sleeve is threadedly connected to one end of the stud bolt. After the connection is completed, the hexagonal screw sleeve is aligned with the hexagonal hole (25) and inserted; S2: moving the first slide plate (2) and the second slide plate (21) into the heat treatment chamber (1), and moving the second slide plate (21) to the sinking plate, so that the hexagonal screw sleeve and the stud bolts are evenly heated; S3: After the stud bolts are heated, the conveyor chain (44) drives the first slide plate (2) and the second slide plate (21) to move, so that the second slide plate (21) moves up to the lower layer of the first M-shaped slide rail (11), preparing for the cleaning of the stud bolts in step S6; S4: causing the air duct (6) to blow the first slide plate (2), the second slide plate (21), the first rotating disk (24) and the second rotating disk (26) in all directions, so as to blow the waste residue generated by the stud bolts after being heated to the bottom of the heat treatment chamber (1); S5: The reciprocating screw (75) drives the push plate to move back and forth on the outside of the reciprocating screw (75) during the rotation process. During the reciprocating movement of the push plate, the waste residue is pushed to the collection box (79) below the two ends of the heat treatment chamber (1) for collection; S6: When the first slide plate (2) and the second slide plate (21) are transferred to the position corresponding to the second M-shaped slide rail (82), the stud bolts are moved into the cleaning tank (8) by the electric cylinder (81) and the second M-shaped slide rail (82), so that the cleaning of the stud bolts can be completed quickly. After the cleaning of the stud bolts is completed, the first slide plate (2) and the second slide plate (21) are continuously transferred to complete the subsequent heat treatment operation.

2. The heat treatment process of a high-strength stud bolt according to claim 1, characterized in that: In the step S2, the first slide plate (2) and the second slide plate (21) are moved into the heat treatment chamber (1). The second slide plate (21) approaches the falling edge (5) during the movement. The falling edge (5) cooperates with the second inclined surface (54) to enable the second slide plate (21) to move smoothly onto the sinking plate.

3. The heat treatment process of a high-strength stud bolt according to claim 2, characterized in that: In the step S2, during the descent of the second slide plate (21), the hexagonal screw sleeve and the stud bolt will descend synchronously with the second slide plate (21), and the second slide plate (21) and the hexagonal screw sleeve and the stud bolt are in a relatively static state, so that when the second slide plate (21) moves and descends smoothly, it can be ensured that the hexagonal screw sleeve and the stud bolt descend smoothly, and the hexagonal screw sleeve and the stud bolt will not be displaced or fall to the position of the hexagonal hole (25).

4. The heat treatment process of a high-strength stud bolt according to claim 3, characterized in that: In the step S2, after the hexagonal screw sleeve and the stud bolt are lowered, the conveying chain (44) stops running, and the stud bolt can be evenly heated by the cooperation of the through hole (27) and the gap between the first slide plate (2) and the second slide plate (21).

5. The heat treatment process of a high-strength stud bolt according to claim 4, characterized in that: In step S2, the length of the long side of the first slide plate (2) is greater than the length of the long side of the second slide plate (21), the distance from the upper end of the falling edge (5) to the upper surface of the sinking plate is greater than the height of the hexagonal screw sleeve, and the protruding length of the first positioning column (22) is greater than the distance from the upper end of the falling edge (5) to the upper surface of the sinking plate.

6. The heat treatment process of a high-strength stud bolt according to claim 5, characterized in that: In the step S3, after the stud bolts are heated, the conveying chain (44) is started again, and the conveying chain (44) continues to run to drive the first slide plate (2) and the second slide plate (21) to continue to move. During the movement of the second slide plate (21), the first inclined surface (53) will contact the rising edge (52). With the cooperation of the first inclined surface (53) and the rising edge (52), the second slide plate (21) can move steadily and smoothly to the lower layer of the first M-shaped slide rail (11), so as to prepare for the subsequent cleaning of the stud bolts.

7. The heat treatment process of a high-strength stud bolt according to claim 6, characterized in that: In the step S4, while the transmission chain (44) drives the first slide (2) and the second slide (21) to continue to move, the first gear (31) moves close to the rack (32) and meshes with the rack (32). After the first gear (31) meshes with the rack (32), while the first slide (2) continues to move, the rack (32) drives the first gear (31) to rotate, and the rotation of the first gear (31) drives the gear ring (3) to rotate, and the rotation of the gear ring (3) drives the first turntable (24) to rotate.

8. The heat treatment process of a high-strength stud bolt according to claim 7, characterized in that: In the step S4, under the action of the second positioning column (28), the first turntable (24) rotates to drive the second turntable (26) to rotate. When the first slide plate (2) moves to the end of the rack (32), the first turntable (24) and the second turntable (26) are rotated 180 degrees. Because the length of the air duct (6) is from the upper end of the falling edge (5) to the end of the rack (32) away from the falling edge (5), during the rotation of the first turntable (24) and the second turntable (26), the air duct (6) can blow the first slide plate (2), the second slide plate (21), the first turntable (24) and the second turntable (26) in all directions.

9. The heat treatment process of a high-strength stud bolt according to claim 8, characterized in that: In the step S6, when the conveying chain (44) conveys the first slide plate (2) and the second slide plate (21) to the position corresponding to the second M-shaped slide rail (82), the conveying chain (44) stops running, and the electric cylinder (81) starts running. The electric cylinder (81) drives the second M-shaped slide rail (82) to descend, so that the first slide plate (2) and the second slide plate (21) enter the cleaning tank (8), shake off the impurities on the outside of the stud bolts, and quickly complete the cleaning of the stud bolts.

10. The heat treatment process of a high-strength stud bolt according to claim 9, characterized in that: After the stud bolts are cleaned, the electric cylinder (81) is started again, so that the electric cylinder (81) drives the second M-shaped slide rail (82) to rise. After the second M-shaped slide rail (82) rises to correspond to the first M-shaped slide rail (11) and the third M-shaped slide rail (9), the electric cylinder (81) stops running. At this time, the conveying chain (44) is started again to make the conveying chain (44) continue to run, so that the first slide plate (2) and the second slide plate (21) can continue to be conveyed, and the subsequent heat treatment operation is completed.

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