Shaft end tempering device for lead screw

Abstract

The invention belongs to the technical field of heat treatment devices, and particularly discloses a shaft end tempering device for a lead screw, which comprises an automatic lifting carrier roller mechanism, a self-positioning ejector pin mechanism, a fixed bottom plate, a lead screw clamping and rotating assembly and a heat treatment mechanism, and the heat treatment mechanism is arranged on the fixed bottom plate in a sliding manner. On one hand, the lead screw shaft body can be rigidly limited and fixed in the upper direction and the lower direction through the lower supporting carrier roller and the upper pressing wheel part, deformation of the lead screw shaft body in the heat treatment process is avoided, and on the other hand, through linkage of the sedimentation control assembly, the automatic unlocking assembly and the hydraulic control assembly, the heat treatment mechanism can be prevented from falling off when passing through the heat treatment mechanism. And the steps of unlocking, transmission, resetting, locking and the like of the sedimentation gear are automatically completed, so that the technical target of automatic sedimentation avoidance of the lower supporting carrier roller when the heat treatment mechanism passes through is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of heat treatment devices, and in particular relates to a shaft end tempering device for a screw rod. Background Art

[0002] After processing, large screw shafts need to undergo half of the heat treatment such as quenching and tempering. This heat treatment is relatively mature from a process perspective, but there is still room for optimization and improvement in the equipment used for heat treatment, especially automated processing.

[0003] Large shaft parts generally cannot be placed in a furnace as a whole, so they are mostly heat treated by coil induction heating, and quenched by spraying quenching liquid toward the surface of the part through a water jacket; however, since the coil and the water jacket are complete rings, they want to move along the axial direction of the part, requiring that there must be no obstruction in the middle of the part. However, if the suspended span of the part is too large, it is easy to bend and deform during the heat treatment process, which is a technical contradiction that must be resolved. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention proposes a shaft end tempering device for a screw rod, which can automatically sink and avoid position when a heat treatment mechanism passes by; on the one hand, the screw rod shaft body can be rigidly limited and fixed from the upper and lower directions through the lower supporting roller and the upper pressure wheel part to avoid its deformation during the heat treatment process; on the other hand, through the linkage of the sinking control component, the automatic unlocking component and the hydraulic control component, the sinking gear can be automatically unlocked, transmitted, reset and locked when the heat treatment mechanism passes by, thereby achieving the technical goal of automatically sinking and avoiding position of the lower supporting roller when the heat treatment mechanism passes by.

[0005] Moreover, in order to simplify the operation process and control structure, the present invention also proposes a self-positioning ejector mechanism that slides into place through the movement of the heat treatment mechanism, and can automatically fix its own position at a suitable position. During this process, the self-positioning ejector mechanism can automatically sense the length of the screw shaft body, thereby expanding the scope of application and practicality of the device.

[0006] The technical solution adopted by the present invention is as follows: The present invention proposes a shaft end tempering device for a screw rod, comprising an automatic lifting roller mechanism, a self-positioning ejector mechanism, a fixed base plate, a screw rod clamping and rotating assembly and a heat treatment mechanism, wherein the screw rod clamping and rotating assembly is arranged on the fixed base plate, and the heat treatment mechanism is slidably arranged on the fixed base plate; the automatic lifting roller mechanism array is arranged on the fixed base plate, and the self-positioning ejector mechanism is slidably arranged on the fixed base plate.

[0007] Through the bidirectional extrusion of the lower supporting roller and the upper pressure wheel, the screw shaft body can be rigidly fixed, thereby avoiding bending of the screw shaft body due to stress release during heat treatment. At the position where the heat treatment coil and the water jacket pass, the lower supporting roller is required to automatically sink to allow the heat treatment coil and the water jacket to pass.

[0008] Furthermore, the automatic lifting roller mechanism includes a lower roller lifting assembly, a settlement control assembly, an automatic unlocking assembly and a hydraulic control assembly, the lower roller lifting assembly is arranged on a fixed bottom plate, the settlement control assembly is arranged on the lower roller lifting assembly, the automatic unlocking assembly is arranged on the settlement control assembly, and the hydraulic control assembly is arranged on the lower roller lifting assembly.

[0009] Through the structural design of the automatic lifting roller mechanism, the support height of the device is adjusted and controlled by hydraulic pressure, so that it can adapt to screw shaft bodies of different diameters. Moreover, the automatic lifting roller mechanism can also automatically realize the lowering and avoiding of the self-positioning ejector mechanism near the position where the heat treatment mechanism passes, thereby ensuring that the annular heat treatment coil and water jacket can be installed on the outside of the screw shaft body, thereby heating or quenching the screw shaft body.

[0010] Preferably, the lower roller lifting assembly includes a fixed mounting plate, a lifting slide bar and a lower supporting roller, the fixed mounting plate is fixedly connected to a fixed bottom plate, lifting sleeves are symmetrically arranged on the fixed mounting plate, the lifting slide bar is snap-fitted and slidably arranged in the lifting sleeves, and the lower supporting roller is fixedly connected to the top end of the lifting slide bar.

[0011] As a further preferred embodiment of the present invention, the hydraulic control component includes a hydraulic push rod, a hydraulic pipeline, a linked control valve, a sliding valve core and a linked control screw. The hydraulic push rod is arranged on a fixed mounting plate, the telescopic end of the hydraulic push rod is arranged at the bottom of the lower supporting roller, the linked control valve is fixedly connected to the fixed mounting plate, the hydraulic push rod, the hydraulic cavity and the linked control valve are connected through a hydraulic pipeline, the sliding valve core is snap-fitted and slidably arranged in the linked control valve, the linked control screw is rotatably arranged in the linked control valve, and a threaded transmission is provided between the linked control screw and the sliding valve core.

[0012] By manually rotating the joint-control screw rod, the sliding of each group of sliding valve cores can be controlled simultaneously and in batches, thereby controlling the opening and closing of the joint-control valve. When the joint-control valve is opened in the initial state, the height of each group of lower supporting rollers can be controlled simultaneously by supplying liquid. Through manual adjustment, the lower supporting rollers can fully and stably support the screw shaft bodies of different specifications and diameters.

[0013] Preferably, the settlement control assembly includes a hydraulic chamber, a settlement screw shaft, a settlement control piston, a settlement gear, a settlement drive rack and a piston return spring. The hydraulic chamber is arranged on a fixed mounting plate, the settlement screw shaft is rotatably arranged in the hydraulic chamber, the settlement control piston is slidably arranged in the hydraulic chamber, the settlement control piston and the settlement screw shaft are threadedly transmitted, the piston return spring is arranged between one end of the hydraulic chamber and the settlement control piston, the settlement gear is fixedly connected to one end of the settlement screw shaft, the settlement gear is annularly evenly provided with locking holes, the settlement drive rack is arranged on the automatic unlocking assembly, and the settlement drive rack and the settlement gear are meshed for transmission.

[0014] During the heat treatment process, that is, after all the linked control valves are closed, the position of the settlement control piston can be changed by means of gear rack transmission and rotation of the settlement screw shaft, thereby realizing the lifting and lowering control of the hydraulic push rod. By automatically lowering the position of the lower supporting roller when the heat treatment mechanism passes by, the automatic settlement and avoidance of the automatic lifting roller mechanism can be achieved.

[0015] As a further preferred embodiment of the present invention, the automatic unlocking component includes a sliding unlocking bracket, a magnetic strip, a lock pin mounting plate, a lock pin sleeve, a lock pin reset spring and a magnetic lock pin. The sliding unlocking bracket is arranged on the heat treatment mechanism, the sinking drive rack is fixedly connected to the sliding unlocking bracket, the magnetic strip is fixedly connected to the sliding unlocking bracket, the lock pin mounting plate is fixedly connected to the hydraulic cavity, the lock pin sleeve is arranged on the lock pin mounting plate, and the magnetic lock pin is snap-fitted and slidably arranged in the lock pin sleeve. The magnetic strip can apply a repulsive force to the magnetic lock pin when it approaches the magnetic lock pin. The length of the sinking drive rack is smaller than the length of the magnetic strip to ensure that the rotation of the sinking gear can bring the lower support roller to sink and there is enough time to rise and reset.

[0016] Except for the position where the heat treatment mechanism is located, the automatic lifting roller mechanism in other positions needs to be able to rigidly support the screw shaft body. At this time, the sinking gear needs to be completely locked. Therefore, through magnetic attraction and repulsion, the locking state of the sinking gear can be released when the heat treatment mechanism is about to arrive, and the locking state of the sinking gear can be restored after the heat treatment mechanism has completely passed; thereby overcoming the technical contradiction that the lower supporting roller must be able to fully support and sink to avoid position.

[0017] Furthermore, the self-positioning ejector mechanism comprises a sliding locking assembly, an ejector assembly and an automatic locking assembly, the sliding locking assembly is slidably arranged on a fixed base plate, the ejector assembly is arranged on the sliding locking assembly, and the automatic locking assembly is arranged on the sliding locking assembly.

[0018] The self-positioning ejector mechanism can utilize the reciprocating motion of the heat treatment mechanism as a drive to automatically control the position adjustment, position locking and position unlocking of the self-positioning ejector mechanism; the above control effect is achieved without the need for an independent drive mechanism and a control module, which not only greatly simplifies the structure and reduces the cost, but also helps to improve the stability and reliability of the entire device.

[0019] Preferably, the sliding locking assembly includes a sliding guide assembly, a sliding seat, a locking rack, a locking lifting block and a locking block return spring; the sliding guide assembly is arranged on a fixed base plate; the sliding seat is arranged on the sliding guide assembly; the sliding seat is provided with a horizontally inclined trapezoidal slide groove and a vertical vertical slide groove; the locking rack is fixedly connected to the fixed base plate; the locking lifting block is snap-fitted and slidably arranged in the vertical slide groove; the locking block return spring is arranged between the bottom of the vertical slide groove and the locking lifting block; the bottom of the locking lifting block is provided with a locking tooth portion matching the locking rack.

[0020] By driving the locking lifting block to rise and fall, the locking and unlocking control of the self-positioning ejector mechanism can be automatically realized; and the lifting and lowering drive of the locking lifting block can be fully automatically controlled according to the movement direction of the heat treatment mechanism and the relative position of the self-positioning ejector mechanism and the heat treatment mechanism through the automatic locking component; not only that, since the prerequisite for the locking of the self-positioning ejector mechanism is that there is a certain extrusion pressure between the ejector body and the screw shaft body, the self-positioning ejector mechanism also has the technical effect of automatically adapting to and matching screw shaft bodies of different length specifications.

[0021] As a further preferred embodiment of the present invention, the ejector assembly includes an ejector bracket, an ejector body, an ejector return spring, an ejector sleeve and a hinged connecting rod, the fixed base plate is fixedly connected to the sliding seat, the ejector body is snap-fitted and slidably arranged in the ejector bracket, the ejector body is provided with an ejector ring, the ejector return spring is arranged between the ejector ring and the ejector bracket, the ejector sleeve is snap-fitted and slidably arranged on the ejector body, and the two ends of the hinged connecting rod are respectively hinged to the ejector sleeve and the locking lifting block.

[0022] Preferably, the automatic locking assembly includes a trapezoidal slide cavity, an inclined sliding block, an inward-retracted avoidance spring, a top-support locking spring and a trigger inclined push rod; the trapezoidal slide cavity is snap-fitted and slidably arranged in the trapezoidal slide groove; the top-support locking spring is arranged between the side wall of the trapezoidal slide groove and the trapezoidal slide cavity; the inclined sliding block is snap-fitted and slidably arranged in the trapezoidal slide cavity; the inward-retracted avoidance spring is arranged between the trapezoidal slide cavity and the inclined sliding block; the trigger inclined push rod is fixed to the heat treatment mechanism; and the trigger inclined push rod and the inclined sliding block are in contact and fit.

[0023] Furthermore, the screw clamping rotation assembly includes a rotation control mechanism, a three-jaw chuck and a screw shaft body, the rotation control mechanism is arranged on a fixed base plate, the three-jaw chuck is rotatably arranged on the rotation control mechanism, the screw shaft body is clamped in the three-jaw chuck, and the screw shaft body is placed on the lower supporting roller.

[0024] Further, the heat treatment mechanism includes a heat treatment movable part, a heat treatment coil, an upper pressure wheel part and a water jacket, the heat treatment movable part is slidably arranged on a fixed bottom plate, the sliding unlocking bracket and the trigger oblique push rod are fixedly connected to the heat treatment movable part, the heat treatment coil is arranged on the heat treatment movable part, the heat treatment coil and the screw shaft body are coaxially arranged, the upper pressure wheel part is arranged on the heat treatment movable part, the upper pressure wheel part is located directly above the screw shaft body, a ball pressure wheel is provided on the upper pressure wheel part, the ball pressure wheel and the screw shaft body are in rolling contact, the water jacket is arranged on the heat treatment movable part, and the water jacket and the screw shaft body are coaxially arranged.

[0025] The screw shaft body can be inductively heated from all sides through the heat treatment coil, and the quenching liquid can be sprayed through the water jacket to achieve quenching of the screw shaft body. This solution completes the quenching and tempering processes at the same workstation, which can reduce the error problems caused by multiple clamping and the bending of parts caused by stress release during the cooling process.

[0026] The beneficial effects achieved by the present invention using the above structure are as follows: (1) The screw shaft body can be rigidly fixed by the bidirectional extrusion of the lower support roller and the upper pressure wheel, thereby avoiding bending of the screw shaft body due to stress release during heat treatment. At the position where the heat treatment coil and the water jacket pass, the lower support roller is required to automatically sink to allow the heat treatment coil and the water jacket to pass.

[0027] (2) Through the structural design of the automatic lifting roller mechanism, the support height of the device is adjusted and controlled by hydraulic pressure, so that it can adapt to screw shaft bodies of different diameters. In addition, the automatic lifting roller mechanism can also automatically realize the lowering and avoiding of the self-positioning ejector mechanism near the position where the heat treatment mechanism passes, thereby ensuring that the annular heat treatment coil and water jacket can be installed on the outside of the screw shaft body, thereby heating or quenching the screw shaft body.

[0028] (3) By manually rotating the joint control screw, the sliding of each group of sliding valve cores can be controlled simultaneously and in batches, thereby controlling the opening and closing of the joint control valve. When the joint control valve is opened in the initial state, the height of each group of lower support rollers can be controlled simultaneously by supplying liquid. By manually adjusting, the lower support rollers can fully and stably support the screw shaft bodies of different specifications and diameters.

[0029] (4) During the heat treatment process, that is, after all the linked control valves are closed, the position of the settlement control piston can be changed by rotating the settlement screw shaft through the gear rack transmission, thereby realizing the lifting and lowering control of the hydraulic push rod. By automatically lowering the position of the lower support roller when the heat treatment mechanism passes by, the automatic settlement and avoidance of the automatic lifting roller mechanism can be realized.

[0030] (5) Except for the position where the heat treatment mechanism is located, the automatic lifting roller mechanism at other positions needs to be able to rigidly support the screw shaft body. At this time, the sinking gear needs to be completely locked. Therefore, through magnetic attraction and repulsion, the locking state of the sinking gear can be released when the heat treatment mechanism is about to arrive, and the locking state of the sinking gear can be restored after the heat treatment mechanism has completely passed; thereby overcoming the technical contradiction that the lower support roller must be able to fully support and sink to avoid the position.

[0031] (6) The self-positioning ejector mechanism can utilize the reciprocating motion of the heat treatment mechanism as a drive to automatically control the position adjustment, position locking and position unlocking of the self-positioning ejector mechanism; the above control effect is achieved without the need for an independent drive mechanism and control module, which not only greatly simplifies the structure and reduces the cost, but also helps to improve the stability and reliability of the entire device.

[0032] (7) By driving the locking lifting block to rise and fall, the locking and unlocking control of the self-positioning ejector mechanism can be automatically realized; and the lifting and lowering drive of the locking lifting block can be fully automatically controlled according to the movement direction of the heat treatment mechanism and the relative positions of the self-positioning ejector mechanism and the heat treatment mechanism through the automatic locking component; not only that, since the prerequisite for the locking of the self-positioning ejector mechanism is that there is a certain extrusion pressure between the ejector body and the screw shaft body, the self-positioning ejector mechanism also has the technical effect of automatically adapting to and matching screw shaft bodies of different length specifications.

[0033] (8) The screw shaft body can be inductively heated from all sides through the heat treatment coil, and the quenching liquid can be sprayed through the water jacket to achieve quenching of the screw shaft body. This scheme places the quenching and tempering processes on the same workstation to complete, which can reduce the error problem caused by multiple clamping and the bending problem of parts caused by stress release during the cooling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A three-dimensional diagram of a shaft end tempering device for a screw rod proposed by the present invention; Figure 2 This is a front view of a shaft end tempering device for a screw rod proposed by the present invention; Figure 3 It is a three-dimensional diagram of the automatic lifting roller mechanism; Figure 4 It is an exploded schematic diagram of the automatic lifting roller mechanism; Figure 5 This is the front view of the automatic lifting roller mechanism; Figure 6 It is the left view of the automatic lifting roller mechanism; Figure 7 for Figure 6 A cross-sectional view along the cutting line AA; Figure 8 It is a three-dimensional diagram of the self-positioning ejector mechanism; Fig. 9 An exploded schematic diagram of the self-positioning ejector mechanism; Fig.10 It is the front view of the self-positioning ejector mechanism; Fig.11 It is the left view of the self-positioning ejector mechanism; Fig.12 for Fig.10 A cross-sectional view along the cutting line BB; Fig.13 for Fig.10 A cross-sectional view along the cutting line CC; Fig.14 for Figure 7 A partial enlarged view of point Ⅰ in the middle; Fig.15 for Fig.13 A partial enlarged view of point II in the middle.

[0035] Among them, 1. Automatic lifting roller mechanism, 2. Self-positioning ejector mechanism, 3. Fixed bottom plate, 4. Screw clamping rotating assembly, 5. Heat treatment mechanism, 6. Lower roller lifting assembly, 7. Sedimentation control assembly, 8. Automatic unlocking assembly, 9. Hydraulic control assembly, 10. Fixed mounting plate, 11. Lifting slide bar, 12. Lower support roller, 13. Hydraulic cavity, 14. Sedimentation screw shaft, 15. Sedimentation control piston, 16. Sedimentation gear, 17. Sedimentation drive rack, 18. Sliding unlocking bracket, 19. Magnetic strip, 20. Lock pin mounting plate, 21. Lock pin sleeve, 22. Magnetic lock pin, 23. Hydraulic push rod, 24. Hydraulic pipeline, 25. Joint control valve, 26. Sliding valve core, 27. Joint control screw, 28. Lifting sleeve, 29. Locking hole, 30. Sliding locking assembly, 31 , ejector assembly, 32, automatic locking assembly, 33, sliding guide assembly, 34, sliding seat, 35, locking rack, 36, locking lifting block, 37, locking block reset spring, 38, ejector bracket, 39, ejector body, 40, ejector reset spring, 41, ejector sleeve, 42, hinged connecting rod, 43, trapezoidal slide cavity, 44, inclined slide block, 45, inward avoidance spring, 46, ejector locking spring, 47, triggering inclined push rod, 48, trapezoidal slide groove, 49, vertical slide groove, 50, locking tooth part, 51, ejector collar, 52, three-jaw chuck, 53, rotation control mechanism, 54, screw shaft body, 55, heat treatment moving part, 56, heat treatment coil, 57, upper pressure wheel part, 58, water jacket, 59, ball pressure wheel, 60, piston reset spring, 61, lock pin reset spring.

[0036] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0039] like Figure 1 to Figure 15 As shown, the present invention proposes a shaft end tempering device for a screw rod, comprising an automatic lifting roller mechanism 1, a self-positioning ejector mechanism 2, a fixed base plate 3, a screw rod clamping and rotating assembly 4 and a heat treatment mechanism 5, the screw rod clamping and rotating assembly 4 is arranged on the fixed base plate 3, and the heat treatment mechanism 5 is slidably arranged on the fixed base plate 3; the automatic lifting roller mechanism 1 is arranged in an array on the fixed base plate 3, and the self-positioning ejector mechanism 2 is slidably arranged on the fixed base plate 3.

[0040] Through the bidirectional extrusion of the lower supporting roller 12 and the upper pressure wheel part 57, the screw shaft body 54 can be rigidly fixed, thereby avoiding bending of the screw shaft body 54 due to stress release during heat treatment. At the position where the heat treatment coil 56 and the water jacket 58 pass, the lower supporting roller 12 is required to automatically sink to allow the heat treatment coil 56 and the water jacket 58 to pass.

[0041] The automatic lifting roller mechanism 1 includes a lower roller lifting component 6, a settlement control component 7, an automatic unlocking component 8 and a hydraulic control component 9. The lower roller lifting component 6 is arranged on the fixed bottom plate 3, the settlement control component 7 is arranged on the lower roller lifting component 6, the automatic unlocking component 8 is arranged on the settlement control component 7, and the hydraulic control component 9 is arranged on the lower roller lifting component 6.

[0042] Through the structural design of the automatic lifting roller mechanism 1, the support height of the device is adjusted and controlled by hydraulic pressure, so that it can adapt to the screw shaft body 54 of different diameters. Moreover, the automatic lifting roller mechanism 1 can also automatically realize the lowering and avoiding position of the self-positioning ejector mechanism 2 near the position where the heat treatment mechanism 5 passes, thereby ensuring that the annular heat treatment coil 56 and the water jacket 58 can be sleeved on the outside of the screw shaft body 54, thereby heating or quenching the screw shaft body 54.

[0043] The lower roller lifting assembly 6 includes a fixed mounting plate 10, a lifting slide bar 11 and a lower supporting roller 12. The fixed mounting plate 10 is fixedly connected to the fixed base plate 3. Lifting sleeves 28 are symmetrically arranged on the fixed mounting plate 10. The lifting slide bar 11 is engaged and slidably arranged in the lifting sleeves 28. The lower supporting roller 12 is fixedly connected to the top end of the lifting slide bar 11.

[0044] The hydraulic control assembly 9 includes a hydraulic push rod 23, a hydraulic pipeline 24, a linked control valve 25, a sliding valve core 26 and a linked control screw 27. The hydraulic push rod 23 is arranged on the fixed mounting plate 10, and the telescopic end of the hydraulic push rod 23 is arranged at the bottom of the lower supporting roller 12. The linked control valve 25 is fixedly connected to the fixed mounting plate 10. The hydraulic push rod 23, the hydraulic cavity 13 and the linked control valve 25 are connected through the hydraulic pipeline 24. The sliding valve core 26 is engaged and slidably arranged in the linked control valve 25. The linked control screw 27 is rotatably arranged in the linked control valve 25, and threaded transmission is provided between the linked control screw 27 and the sliding valve core 26.

[0045] By manually rotating the joint control screw 27, the sliding of each group of sliding valve cores 26 can be controlled simultaneously and in batches, thereby controlling the opening and closing of the joint control valve 25. When the joint control valve 25 is opened in the initial state, the height of each group of lower support rollers 12 can be controlled simultaneously by supplying liquid. Through manual adjustment, the lower support rollers 12 can fully and stably support the screw shaft bodies 54 of different specifications and diameters.

[0046] The settlement control assembly 7 includes a hydraulic chamber 13, a settlement screw shaft 14, a settlement control piston 15, a settlement gear 16, a settlement drive rack 17 and a piston return spring 60. The hydraulic chamber 13 is arranged on the fixed mounting plate 10, the settlement screw shaft 14 is rotatably arranged in the hydraulic chamber 13, the settlement control piston 15 is slidably arranged in the hydraulic chamber 13, and a threaded transmission is formed between the settlement control piston 15 and the settlement screw shaft 14. The piston return spring 60 is arranged between one end of the hydraulic chamber 13 and the settlement control piston 15. The settlement gear 16 is fixedly connected to one end of the settlement screw shaft 14. The settlement gear 16 is evenly distributed with locking holes 29 in an annular shape. The settlement drive rack 17 is arranged on the automatic unlocking assembly 8, and the settlement drive rack 17 and the settlement gear 16 are meshed for transmission.

[0047] During the heat treatment process, that is, after all the linked control valves 25 are closed, the position of the sedimentation control piston 15 can be changed by means of gear rack transmission and rotation of the sedimentation screw shaft 14, thereby realizing the lifting and lowering control of the hydraulic push rod 23. By automatically lowering the position of the lower supporting roller 12 when the heat treatment mechanism 5 passes by, the automatic sinking and avoiding position of the automatic lifting roller mechanism 1 can be realized.

[0048] The automatic unlocking assembly 8 includes a sliding unlocking bracket 18, a magnetic strip 19, a lock pin mounting plate 20, a lock pin sleeve 21, a lock pin reset spring 61 and a magnetic lock pin 22. The sliding unlocking bracket 18 is arranged on the heat treatment mechanism 5, the sinking drive rack 17 is fixedly connected to the sliding unlocking bracket 18, the magnetic strip 19 is fixedly connected to the sliding unlocking bracket 18, the lock pin mounting plate 20 is fixedly connected to the hydraulic cavity 13, the lock pin sleeve 21 is arranged on the lock pin mounting plate 20, and the magnetic lock pin 22 is engaged and slidably arranged in the lock pin sleeve 21. The magnetic strip 19 can apply a repulsive force to the magnetic lock pin 22 when it is close to the magnetic lock pin 22. The length of the sinking drive rack 17 is less than the length of the magnetic strip 19 to ensure that the rotation of the sinking gear 16 can bring the lower support roller 12 to sink and there is enough time to rise and reset.

[0049] Except for the position where the heat treatment mechanism 5 is located, the automatic lifting roller mechanism 1 at other positions needs to be able to rigidly support the screw shaft body 54. At this time, the sinking gear 16 needs to be completely locked. Therefore, through magnetic attraction and repulsion, the locking state of the sinking gear 16 can be released when the heat treatment mechanism 5 is about to arrive, and the locking state of the sinking gear 16 can be restored after the heat treatment mechanism 5 has completely passed; thereby overcoming the technical contradiction that the lower supporting roller 12 must be able to fully support and sink to avoid the position.

[0050] The self-positioning ejector mechanism 2 includes a sliding locking assembly 30 , an ejector assembly 31 and an automatic locking assembly 32 . The sliding locking assembly 30 is slidably disposed on the fixed base plate 3 , the ejector assembly 31 is disposed on the sliding locking assembly 30 , and the automatic locking assembly 32 is disposed on the sliding locking assembly 30 .

[0051] The self-positioning ejector mechanism 2 can utilize the reciprocating motion of the heat treatment mechanism 5 as a drive to automatically control the position adjustment, position locking and position unlocking of the self-positioning ejector mechanism 2; the above control effect is achieved without the need for an independent driving mechanism and a control module, which not only greatly simplifies the structure and reduces the cost, but also helps to improve the stability and reliability of the entire device.

[0052] The sliding locking assembly 30 includes a sliding guide assembly 33, a sliding seat 34, a locking rack 35, a locking lifting block 36 and a locking block reset spring 37. The sliding guide assembly 33 is arranged on the fixed base plate 3, the sliding seat 34 is arranged on the sliding guide assembly 33, the sliding seat 34 is provided with a horizontally inclined trapezoidal slide groove 48 and a vertical vertical slide groove 49, the locking rack 35 is fixedly connected to the fixed base plate 3, the locking lifting block 36 is engaged and slidably arranged in the vertical slide groove 49, the locking block reset spring 37 is arranged between the bottom of the vertical slide groove 49 and the locking lifting block 36, and the bottom of the locking lifting block 36 is provided with a locking tooth portion 50 matching the locking rack 35.

[0053] By driving the locking lifting block 36 to rise and fall, the locking and unlocking control of the self-positioning ejector mechanism 2 can be automatically realized; and the lifting and lowering drive of the locking lifting block 36 can be fully automatically controlled according to the movement direction of the heat treatment mechanism 5 and the relative position of the self-positioning ejector mechanism 2 and the heat treatment mechanism 5 through the automatic locking component 32; not only that, since the prerequisite for locking the self-positioning ejector mechanism 2 is that there is a certain extrusion pressure between the ejector body 39 and the screw shaft body 54, the self-positioning ejector mechanism 2 also has the technical effect of automatically adapting to and matching screw shaft bodies 54 of different length specifications.

[0054] The ejector assembly 31 includes an ejector bracket 38, an ejector body 39, an ejector return spring 40, an ejector sleeve 41 and a hinged connecting rod 42. The fixed base plate 3 is fixedly connected to the sliding seat 34. The ejector body 39 is slidably arranged in the ejector bracket 38. An ejector ring 51 is provided on the ejector body 39. The ejector return spring 40 is arranged between the ejector sleeve 51 and the ejector bracket 38. The ejector sleeve 41 is slidably arranged on the ejector body 39. The two ends of the hinged connecting rod 42 are respectively hinged to the ejector sleeve 41 and the locking lifting block 36.

[0055] The automatic locking assembly 32 includes a trapezoidal slide cavity 43, an inclined slide block 44, an inward-retracted avoidance spring 45, a top-support locking spring 46 and a triggering inclined push rod 47. The trapezoidal slide cavity 43 is slidably arranged in the trapezoidal slide groove 48, the top-support locking spring 46 is arranged between the side wall of the trapezoidal slide groove 48 and the trapezoidal slide cavity 43, the inclined slide block 44 is slidably arranged in the trapezoidal slide cavity 43, the inward-retracted avoidance spring 45 is arranged between the trapezoidal slide cavity 43 and the inclined slide block 44, the triggering inclined push rod 47 is fixedly connected to the heat treatment mechanism 5, and the triggering inclined push rod 47 and the inclined slide block 44 are in contact and cooperate.

[0056] The screw clamping rotating assembly 4 includes a rotation control mechanism 53, a three-jaw chuck 52 and a screw shaft body 54. The rotation control mechanism 53 is arranged on the fixed base plate 3, the three-jaw chuck 52 is rotatably arranged on the rotation control mechanism 53, the screw shaft body 54 is engaged in the three-jaw chuck 52, and the screw shaft body 54 is placed on the lower supporting roller 12.

[0057] The heat treatment mechanism 5 includes a heat treatment movable part 55, a heat treatment coil 56, an upper pressure wheel part 57 and a water jacket 58. The heat treatment movable part 55 is slidably arranged on the fixed base plate 3. The sliding unlocking bracket 18 and the trigger inclined push rod 47 are fixedly connected to the heat treatment movable part 55. The heat treatment coil 56 is arranged on the heat treatment movable part 55. The heat treatment coil 56 and the screw shaft body 54 are coaxially arranged. The upper pressure wheel part 57 is arranged on the heat treatment movable part 55. The upper pressure wheel part 57 is located directly above the screw shaft body 54. A ball pressure wheel 59 is provided on the upper pressure wheel part 57. The ball pressure wheel 59 and the screw shaft body 54 are in rolling contact. The water jacket 58 is arranged on the heat treatment movable part 55. The water jacket 58 and the screw shaft body 54 are coaxially arranged.

[0058] The screw shaft body 54 can be inductively heated from all sides through the heat treatment coil 56, and the quenching liquid can be sprayed through the water jacket 58, thereby realizing the quenching of the screw shaft body 54. This solution completes the quenching and tempering processes at the same workstation, which can reduce the error problems caused by multiple clamping and the bending problem of parts caused by stress release during the cooling process.

[0059] When in use, the user first needs to open all the linked control valves 25 at the same time by rotating the linked control screw 27. When the linked control screw 27 rotates, the sliding valve core 26 will slide relative to the linked control valve 25, thereby opening the flow channel originally blocked by the sliding valve core 26. At this time, through the external piston squeezing, all the hydraulic push rods 23 can be controlled to extend synchronously, so that the lower support roller 12 is synchronously raised to the approximate position; Then place the screw shaft body 54 to be processed on the lower supporting roller 12, and then use the three-jaw chuck 52 to clamp and fix one end of the screw shaft body 54, and then continue to adjust the height of the lower supporting roller 12 until the screw shaft body 54 is level as a whole, and then close all the inter-control valves 25 by rotating the inter-control screw 27.

[0060] Then, the heat treatment moving part 55 is controlled to move horizontally. In the initial state, the screw clamping rotating assembly 4 is located between the heat treatment mechanism 5 and the screw shaft body 54. Therefore, when the heat treatment moving part 55 slides, it will first trigger the inclined push rod 47 to support the inclined sliding block 44 and push the self-positioning ejector mechanism 2 as a whole toward the screw shaft body 54. After the ejector body 39 contacts the tail end of the screw shaft body 54, the heat treatment mechanism 5 continues to slide, and the ejector body 39 will slide relative to the ejector bracket 38. During the sliding process of the ejector body 39 with the ejector sleeve 41, the locking lifting block 36 will be pressed down through the linkage of the hinge connecting rod 42 (during this process, the ejector sleeve 41 will continue to slide on the ejector body 39 for a distance); When the locking tooth portion 50 and the locking rack 35 are combined with each other, it means that the ejector return spring 40 has reached a certain compression amount. At this time, the blocking of the locking lifting block 36 is lost, and the trapezoidal slide cavity 43 will slide to the top of the locking lifting block 36 under the elastic force of the supporting locking spring 46. Since the trapezoidal slide groove 48 is inclined, the trapezoidal slide cavity 43 can completely press down the ejector body 39 during this process, thereby completing the locking between the locking rack 35 and the locking tooth portion 50.

[0061] After the position of the self-positioning ejector mechanism 2 is fixed, the heat treatment moving part 55 continues to move, and the inclined slide block 44 will overcome the elastic force of the retracting avoidance spring 45 and retract toward the trapezoidal slide cavity 43, thereby allowing the triggering inclined push rod 47 to pass.

[0062] When the heat treatment mechanism 5 passes by the side of the automatic lifting roller mechanism 1, the position of the screw shaft body 54 will be limited from the top by the upper pressure wheel part 57. During the movement of the heat treatment moving part 55, the magnetic strip 19 will first approach the magnetic lock pin 22. Through the magnetic repulsive force applied by the magnetic strip 19 to the magnetic lock pin 22, the magnetic lock pin 22 will overcome the elastic force of the lock pin return spring 61 and retract toward the inside of the lock pin sleeve 21. After the magnetic lock pin 22 slides out of the locking hole 29, the lock on the sinking gear 16 will be released. Then, the sinking driving rack 17 meshes with the sinking gear 16 and drives the sinking gear 16 to rotate, and the sinking control piston 15 slides in the hydraulic cavity 13 through the sinking screw shaft 14. When the sinking control piston 15 slides, the transmission fluid in the hydraulic push rod 23 enters the hydraulic cavity 13 and causes the lower supporting roller 12 to drop out of position, leaving space for the heat treatment coil 56 and the water jacket 58 to pass through; After the settling gear 16 and the settling driving rack 17 are separated, the settling control piston 15 will slowly reset under the elastic force of the piston reset spring 60. During this process, the liquid in the lower supporting roller 12 will flow back into the hydraulic push rod 23 and make the hydraulic push rod 23 extend and reset. The magnetic strip 19 will leave the magnetic locking pin 22 only after the hydraulic push rod 23 is reset. At this time, the magnetic locking pin 22 is extended again under the elastic force of the locking pin reset spring 61, and inserted into the locking hole 29 to complete the locking and fixing of the sinking gear 16 again. Due to the closure of the linked control valve 25, when the sinking gear 16 is locked, the sinking control piston 15 cannot slide and the hydraulic push rod 23 cannot extend or retract.

[0063] During the movement of the heat treatment mechanism 5, the screw shaft body 54 can be rigidly limited by the lower supporting roller 12 and the upper pressure wheel portion 57, the screw shaft body 54 can be inductively heated by the heat treatment coil 56, and a specific position of the screw shaft body 54 can be quenched by spraying quenching liquid toward the screw shaft body 54 through the water jacket 58; The length of the sedimentation drive rack 17 is smaller than the length of the magnetic strip 19, and the sedimentation drive rack 17 is located in the middle position of the magnetic strip 19. Therefore, during the reciprocating motion of the heat treatment moving part 55, the sedimentation gear 16 can be unlocked first, and then the sedimentation drive rack 17 drives the sedimentation gear 16 to rotate. After stopping the drive, sufficient reset time is left for the sedimentation control piston 15 and the sedimentation gear 16. Finally, the magnetic lock pin 22 is reset and the sedimentation gear 16 is locked again through the departure of the magnetic strip 19.

[0064] After the treatment is completed, the heat treatment moving part 55 will be reset. When the heat treatment moving part 55 passes through the self-positioning ejector mechanism 2 in the locked state, it will first push the inclined slide block 44 and the trapezoidal slide cavity 43 to slide by triggering the inclined push rod 47 to overcome the elastic force of the supporting locking spring 46. After the trapezoidal slide cavity 43 slides, the locking lifting block 36 will rise and reset under the elastic force of the locking block reset spring 37, and separate the locking rack 35 and the locking tooth part 50. After being unlocked, the self-positioning ejector mechanism 2 will first slide along with the heat treatment movable part 55. After sliding to the hard limit position of the self-positioning ejector mechanism 2, the continued sliding of the heat treatment movable part 55 will continue to push the trapezoidal slide cavity 43 to slide by triggering the inclined push rod 47. In the process of sliding while overcoming the elastic force of the ejector locking spring 46, the trapezoidal slide cavity 43 will also retract toward the trapezoidal slide groove 48. Until the inclined push rod 47 and the inclined slide block 44 are separated, the heat treatment movable part 55 will pass over the self-positioning ejector mechanism 2 and complete the final reset.

[0065] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0066] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A shaft end tempering device for a screw, comprising a fixed base plate (3), a screw clamping and rotating assembly (4) and a heat treatment mechanism (5), wherein the screw clamping and rotating assembly (4) is arranged on the fixed base plate (3), and the heat treatment mechanism (5) is slidably arranged on the fixed base plate (3); characterized in that: It also includes an automatic lifting roller mechanism (1) and a self-positioning ejector mechanism (2), wherein the automatic lifting roller mechanism (1) is arranged in an array on a fixed bottom plate (3), and the self-positioning ejector mechanism (2) is slidably arranged on the fixed bottom plate (3); The automatic lifting roller mechanism (1) comprises a lower roller lifting assembly (6), a sedimentation control assembly (7), an automatic unlocking assembly (8) and a hydraulic control assembly (9), wherein the lower roller lifting assembly (6) is arranged on a fixed bottom plate (3), the sedimentation control assembly (7) is arranged on the lower roller lifting assembly (6), the automatic unlocking assembly (8) is arranged on the sedimentation control assembly (7), and the hydraulic control assembly (9) is arranged on the lower roller lifting assembly (6); The self-positioning ejector pin mechanism (2) comprises a sliding locking assembly (30), an ejector pin assembly (31) and an automatic locking assembly (32); the sliding locking assembly (30) is slidably disposed on a fixed base plate (3); the ejector pin assembly (31) is disposed on the sliding locking assembly (30); and the automatic locking assembly (32) is disposed on the sliding locking assembly (30).

2. The shaft end tempering device for a screw rod according to claim 1, characterized in that: The lower roller lifting assembly (6) comprises a fixed mounting plate (10), a lifting slide bar (11) and a lower supporting roller (12); the fixed mounting plate (10) is fixedly connected to a fixed bottom plate (3); a lifting sleeve (28) is symmetrically arranged on the fixed mounting plate (10); the lifting slide bar (11) is slidably engaged in the lifting sleeve (28); and the lower supporting roller (12) is fixedly connected to the top end of the lifting slide bar (11).

3. The shaft end tempering device for a screw rod according to claim 2, characterized in that: The settlement control assembly (7) comprises a hydraulic chamber (13), a settlement screw shaft (14), a settlement control piston (15), a settlement gear (16), a settlement drive rack (17) and a piston return spring (60); the hydraulic chamber (13) is arranged on a fixed mounting plate (10); the settlement screw shaft (14) is rotatably arranged in the hydraulic chamber (13); the settlement control piston (15) is slidably arranged in the hydraulic chamber (13); and the settlement control piston (15) is arranged in a locking manner in the hydraulic chamber (13). 5) and the sinking screw shaft (14), the piston return spring (60) is arranged between one end of the hydraulic chamber (13) and the sinking control piston (15), the sinking gear (16) is fixedly connected to one end of the sinking screw shaft (14), the sinking gear (16) is annularly evenly provided with locking holes (29), the sinking drive rack (17) is arranged on the automatic unlocking component (8), and the sinking drive rack (17) and the sinking gear (16) are meshed for transmission.

4. The shaft end tempering device for a screw rod according to claim 3, characterized in that: The automatic unlocking component (8) comprises a sliding unlocking bracket (18), a magnetic strip (19), a lock pin mounting plate (20), a lock pin sleeve (21), a lock pin return spring (61) and a magnetic lock pin (22); the sliding unlocking bracket (18) is arranged on the heat treatment mechanism (5); the sinking drive rack (17) is fixedly connected to the sliding unlocking bracket (18); the magnetic strip (19) is fixedly connected to the sliding unlocking bracket (18); the lock pin mounting plate (20) is fixedly connected to the hydraulic cavity (13); the lock pin sleeve (21) is arranged on the lock pin mounting plate (20); the magnetic lock pin (22) is slidably arranged in the lock pin sleeve (21); the magnetic strip (19) can apply a repulsive force to the magnetic lock pin (22) when it is close to the magnetic lock pin (22); and the magnetic lock pin (22) has a sliding resistance in the lock pin sleeve (21).

5. The shaft end tempering device for a screw rod according to claim 4, characterized in that: The hydraulic control assembly (9) comprises a hydraulic push rod (23), a hydraulic pipeline (24), a joint control valve (25), a sliding valve core (26) and a joint control screw (27); the hydraulic push rod (23) is arranged on a fixed mounting plate (10); the telescopic end of the hydraulic push rod (23) is arranged at the bottom of the lower supporting roller (12); the joint control valve (25) is fixedly connected to the fixed mounting plate (10); the hydraulic push rod (23), the hydraulic chamber (13) and the joint control valve (25) are connected through the hydraulic pipeline (24); the sliding valve core (26) is slidably arranged in the joint control valve (25) in an engaging manner; the joint control screw (27) is rotatably arranged in the joint control valve (25); and threaded transmission is provided between the joint control screw (27) and the sliding valve core (26).

6. The shaft end tempering device for a screw rod according to claim 5, characterized in that: The sliding locking assembly (30) comprises a sliding guide assembly (33), a sliding seat (34), a locking rack (35), a locking lifting block (36) and a locking block reset spring (37); the sliding guide assembly (33) is arranged on a fixed base plate (3); the sliding seat (34) is arranged on the sliding guide assembly (33); the sliding seat (34) is provided with a horizontally inclined trapezoidal slide groove (48) and a vertical slide groove (49); the locking rack (35) is fixedly connected to the fixed base plate (3); the locking lifting block (36) is engaged and slidably arranged in the vertical slide groove (49); the locking block reset spring (37) is arranged between the bottom of the vertical slide groove (49) and the locking lifting block (36); the bottom of the locking lifting block (36) is provided with a locking tooth portion (50) matching the locking rack (35).

7. The shaft end tempering device for a screw rod according to claim 6, characterized in that: The ejector assembly (31) comprises an ejector bracket (38), an ejector body (39), an ejector return spring (40), an ejector sleeve (41) and a hinged connecting rod (42); the fixed base plate (3) is fixedly connected to the sliding seat (34); the ejector body (39) is slidably mounted in the ejector bracket (38); an ejector ring (51) is provided on the ejector body (39); the ejector return spring (40) is disposed between the ejector sleeve (51) and the ejector bracket (38); the ejector sleeve (41) is slidably mounted on the ejector body (39); and two ends of the hinged connecting rod (42) are respectively hinged to the ejector sleeve (41) and the locking lifting block (36).

8. The shaft end tempering device for a screw rod according to claim 7, characterized in that: The automatic locking assembly (32) includes a trapezoidal slide cavity (43), an inclined slide block (44), an inwardly retracted avoidance spring (45), a supporting locking spring (46) and a triggering inclined push rod (47); the trapezoidal slide cavity (43) is slidably arranged in the trapezoidal slide groove (48); the supporting locking spring (46) is arranged between the side wall of the trapezoidal slide groove (48) and the trapezoidal slide cavity (43); the inclined slide block (44) is slidably arranged in the trapezoidal slide cavity (43); the inwardly retracted avoidance spring (45) is arranged between the trapezoidal slide cavity (43) and the inclined slide block (44); the triggering inclined push rod (47) is fixedly connected to the heat treatment mechanism (5); and the triggering inclined push rod (47) and the inclined slide block (44) are in contact and fit.

9. The shaft end tempering device for a screw rod according to claim 8, characterized in that: The screw rod clamping rotating assembly (4) comprises a rotating control mechanism (53), a three-jaw chuck (52) and a screw rod shaft body (54); the rotating control mechanism (53) is arranged on the fixed base plate (3); the three-jaw chuck (52) is rotatably arranged on the rotating control mechanism (53); the screw rod shaft body (54) is engaged with the three-jaw chuck (52); and the screw rod shaft body (54) is placed on the lower supporting roller (12).

10. The shaft end tempering device for a screw rod according to claim 9, characterized in that: The heat treatment mechanism (5) comprises a heat treatment moving part (55), a heat treatment coil (56), an upper pressure wheel part (57) and a water jacket (58); the heat treatment moving part (55) is slidably arranged on the fixed bottom plate (3); the sliding unlocking bracket (18) and the triggering inclined push rod (47) are fixedly connected to the heat treatment moving part (55); the heat treatment coil (56) is arranged on the heat treatment moving part (55); the heat treatment coil (56) and the screw shaft body ( 54) are coaxially arranged, the upper pressure wheel portion (57) is arranged on the heat treatment movable portion (55), the upper pressure wheel portion (57) is located directly above the screw shaft body (54), the upper pressure wheel portion (57) is provided with a ball pressure wheel (59), the ball pressure wheel (59) and the screw shaft body (54) are in rolling contact, the water jacket (58) is arranged on the heat treatment movable portion (55), and the water jacket (58) and the screw shaft body (54) are coaxially arranged.

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