Shaft rod workpiece deformation limiting mechanism assembly of shaft rod type induction quenching machine tool

Abstract

A shaft rod workpiece deformation limiting mechanism assembly of a shaft rod type induction quenching machine tool belongs to the field of heat treatment equipment and comprises a lead screw, one end of the lead screw is in threaded connection with a lead screw nut, an optical axis part of the lead screw is arranged in a through hole of a fixing plate in a penetrating manner, and the other end of the lead screw extends out of the through hole; the lead screw supporting seat is fixed at the end part of the through hole of the fixed plate, a bearing which is axially limited is arranged in the lead screw supporting seat, and the lead screw penetrates out of the bearing; the roller mounting seat is relatively and fixedly connected with the fixing plate, and a pair of freely rotating rollers is arranged at one end, deviating from the lead screw nut, of the roller mounting seat side by side; the position adjusting plate is provided with a vertical plate surface and a horizontal plate surface, the vertical plate surface is used for being connected with the shaft lever type induction quenching machine tool, the horizontal plate surface is used for being fixedly connected with the fixing plate through bolts, a bolt connecting hole in the horizontal plate surface or the fixing plate is an adjusting long hole, and the length direction of the adjusting long hole is parallel to the lead screw. The deformation limiting device can meet the deformation limiting capacity of different types of shaft rod workpieces under the complex quenching working condition.

Description

Technical Field

[0001] This utility model belongs to the field of heat treatment equipment, specifically relating to a shaft workpiece deformation limiting mechanism assembly for a shaft-type induction hardening machine tool. Background Technology

[0002] The shaft-type induction hardening machine tool mainly uses the longitudinal movement of the transformer to drive the up and down movement of the outer diameter inductor to scan and heat the mounted shaft-type workpiece. It has strong applicability and can be used for quenching various types of shaft workpieces. However, the problem of workpiece deformation during processing has always been a challenge.

[0003] In the existing technology, the traditional deformation limiting mechanism limits the workpiece by using a pair of fixed rollers. Because it is difficult to precisely adjust the distance between the rollers and the outer circle of the workpiece, it cannot effectively solve the problem of workpiece deformation. Moreover, because the position of the rollers cannot be adjusted by a large distance, the adaptability is poor. When the workpiece is changed, different rollers need to be replaced, which leads to the problem of low quenching efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a shaft workpiece deformation limiting mechanism assembly for shaft-type induction hardening machine tools. It has the advantages of simple structure, stability and reliability, and strong applicability. It also eliminates the need for frequent roller replacement when changing workpiece shapes, thus ensuring quenching efficiency.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a shaft workpiece deformation limiting mechanism assembly for a shaft-type induction hardening machine tool, including a lead screw, one end of which is threadedly connected to a lead screw nut, the lead screw nut being able to connect to the shaft-type induction hardening machine tool, the optical shaft portion on the lead screw being movably inserted into a through hole in a fixed plate and being able to rotate in the through hole, and the other end of the lead screw extending out from the through hole;

[0006] A lead screw support is fixed to the end of the through hole of the fixed plate. A bearing that is axially limited is provided inside the lead screw support. The lead screw passes through the bearing and is connected to the bearing.

[0007] A roller mounting base is fixedly connected to the fixed plate. A pair of freely rotating rollers are arranged side by side on the roller mounting base at the end opposite to the lead screw nut. The line connecting the axes of the two rollers is perpendicular to the axis of the lead screw.

[0008] The position adjustment plate has a vertical plate surface and a horizontal plate surface. The vertical plate surface is used to connect with the shaft-type induction hardening machine tool, and the horizontal plate surface is used to fix the plate to the fixed plate by bolts. The bolt connection holes on the horizontal plate surface or the fixed plate are adjustment elongated holes, and the length direction of the adjustment elongated holes is parallel to the lead screw.

[0009] Furthermore, it also includes a cylinder, the cylinder body of which is fixedly connected to the fixed plate, and the cylinder rod end of which is fixedly connected to the roller mounting seat.

[0010] Furthermore, the lead screw support seat is provided with a stepped surface for axially limiting the bearing, and the bearing is also provided with retaining rings on both sides, which are sleeved on the lead screw. The retaining ring on the inner side abuts against the shoulder of the lead screw, and the retaining ring on the outer side is tightened onto the bearing by a nut installed on the lead screw.

[0011] Furthermore, a handwheel is installed at one end of the lead screw extending from the lead screw support seat.

[0012] Furthermore, a baffle is fixed to the end face of the lead screw that is connected to the lead screw nut, and the diameter of the baffle is larger than the diameter of the lead screw.

[0013] Alternatively, the fixing plate may be provided with the aforementioned roller mounting base.

[0014] Alternatively, the fixing plate is provided with two roller mounting seats, which are distributed on the left and right sides of the lead screw.

[0015] Furthermore, it also includes two guiding mechanisms, which are distributed on both sides of the lead screw. The two relatively movable parts of the guiding mechanisms are respectively connected to the fixed plate and the shaft-type induction hardening machine tool.

[0016] Furthermore, the guiding mechanism includes a slidingly fitted guide sleeve and guide rod or a linear bearing and guide rod, wherein the guide rod is fixedly connected to the fixed plate, and the guide sleeve or linear bearing is fixedly connected to the shaft-type induction hardening machine tool.

[0017] Furthermore, the guide sleeve is a self-lubricating copper sleeve.

[0018] The beneficial effects of this utility model are: This utility model can adjust the rollers to a suitable position by rotating the lead screw according to the diameter of the workpiece in the shaft-type induction hardening machine tool, thereby limiting the workpiece of the shaft and avoiding the need to frequently change rollers to adapt to workpieces of different diameters, thus ensuring the efficiency of induction hardening.

[0019] This invention can be further expanded in scope of application by replacing the lead screw with one of different external thread lengths or different total lead screw lengths.

[0020] This invention can also meet the positioning requirements of workpieces with different diameters by replacing rollers of different sizes.

[0021] Therefore, this invention has strong applicability in limiting the deformation of shaft workpieces and can meet the quenching requirements of various shaft workpieces.

[0022] Furthermore, depending on whether the shaft-type induction hardening machine tool is a single-station or double-station machine tool, this invention can install one or two roller mounting seats and a corresponding number of rollers on the fixed plate. For slender shafts with large length and small diameter, multiple shaft workpiece deformation limiting mechanism assemblies can be arranged vertically to prevent workpiece deformation. Therefore, this invention has the characteristics of a wide range of deformation limiting diameters and large lengths, and can meet the deformation limiting capabilities of different types of shaft workpieces and complex quenching conditions. Attached Figure Description

[0023] Figure 1 This is a front view of the connecting window plate of the shaft workpiece deformation limiting mechanism assembly of this utility model;

[0024] Figure 2 This is a top-view sectional view of the connecting window plate of the shaft workpiece deformation limiting mechanism assembly of this utility model.

[0025] Figure 3 This is a left view of the shaft workpiece deformation limiting mechanism assembly described in this utility model;

[0026] Figure 4 This is a schematic diagram showing the installation state of the lead screw and lead screw support in the shaft workpiece deformation limiting mechanism assembly.

[0027] The markings in the diagram are: 1. Position adjustment plate; 2. Fixing plate; 3. Cylinder; 4. Roller mounting seat; 5. Roller; 6. Lead screw; 7. Lead screw nut; 8. Self-lubricating copper sleeve; 9. Guide rod; 10. Lead screw support seat; 11. Handwheel; 12. Baffle; 13. Bearing; 14. Retaining ring; 15. Nut; 100. Window connecting plate; 200. Shaft workpiece. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention in any way.

[0029] See attached document Figure 1-3 As shown, a shaft workpiece deformation limiting mechanism assembly for a shaft-type induction hardening machine tool includes a position adjusting plate 1, a fixing plate 2, a cylinder 3, a roller mounting seat 4, a roller 5, a lead screw 6, a lead screw nut 7, a lead screw support seat 10, and a handwheel 11.

[0030] The shaft workpiece deformation limiting mechanism assembly described in this embodiment is suitable for dual-station shaft induction hardening machine tools. Therefore, it has two roller mounting seats 4, each with two freely rotating rollers 5. The two rollers 5 are arranged side-by-side to form a V-shaped structure that constrains the outer diameter of the shaft workpiece, effectively solving the deformation problem during the hardening process. In this embodiment, bolt-type roller bearings are used as the rollers 5. In other embodiments, a mounting shaft can be provided on the roller mounting seat 4, with the rollers 5 rotating on the mounting shaft.

[0031] Specifically, the roller mounting base 4 can be directly fixed to the fixed plate 2, or the roller mounting base 4 can be fixedly connected to the end of the cylinder rod of the cylinder 3, and the cylinder body of the cylinder 3 can be fixed to the lower surface of the fixed plate 2. At the end of the quenching process, the extension and retraction of the cylinder rod can drive the roller mounting base 4 to move, preventing the roller 5 from contacting the upper center of the quenching machine tool.

[0032] The fixed plate 2 has a through hole in its middle along its length. The optical axis of the lead screw 6 passes through the through hole, and the diameter of the hole is larger than the diameter of the optical axis of the lead screw 6, allowing the lead screw 6 to rotate within it. One end of the lead screw 6 outside the through hole is a threaded end with an external thread, and the other end is a control end, which is threadedly connected to the lead screw nut 7. In use, the lead screw nut 7 is fixed to the window connecting plate 100 of the induction hardening machine tool, which is part of the protective curtain that serves as a protective device on the induction hardening machine tool. The control end of the lead screw 6 extends out of the fixed plate 2 and is fitted with a handwheel 11, which rotates the lead screw 6 by turning the handwheel 11. A lead screw support seat 10 is also provided between the lead screw 6 and the fixed plate 2. The lead screw support seat 10 is fixed inside the fixed plate 2. The lead screw 6 passes through the lead screw support seat 10. The lead screw 6 can rotate relative to the lead screw support seat 10, and the lead screw support seat 10 provides axial limit to prevent the lead screw 6 from moving axially relative to the fixed plate 2. Thus, through the rotation of the lead screw 6, the lead screw 6 drives the fixed plate 2 to move axially synchronously.

[0033] Since the lead screw 6 needs to move axially relative to the lead screw nut 7 during rotation, in order to prevent the lead screw 6 from disengaging from the lead screw nut 7 during rotation, a baffle 12 is fixed to the end of the lead screw 6 by screws. The diameter of the baffle 12 is larger than the diameter of the lead screw 6, which can prevent the lead screw 6 from disengaging from the lead screw nut 7.

[0034] like Figure 4As shown, the lead screw support 10 is equipped with a bearing 13 and a retaining ring 14. The inner ring of the bearing is fixedly assembled with the rod body of the lead screw 6. The two ends of the inner ring of the bearing abut against the two retaining rings 14 respectively. The inner retaining ring 14 rests on the shoulder of the lead screw 6, and the outer retaining ring 14 is tightened by the nut 15 threaded to the end of the lead screw 6. Thus, the nut 15 and the shoulder of the lead screw 6 clamp the retaining ring 14 and the inner ring of the bearing 13. The two ends of the outer ring of the bearing rest on the stepped surface inside the lead screw support 10, thereby achieving axial positioning of the lead screw 6 relative to the lead screw support 10. The bearing 13 ensures the rotation of the lead screw 6.

[0035] Furthermore, such as Figure 1 , 2 As shown, the fixed plate 2 and the window connecting plate 100 are connected by a position adjusting plate 1. The position adjusting plate 1 is preferably an L-shaped plate, with its vertical surface fixed to the window connecting plate 100 by bolts, and its horizontal surface connected to the fixed plate 2 by bolts. Furthermore, the position adjusting plate 1 or the fixed plate 2 is provided with an adjusting elongated hole, the long axis of which is parallel to the lead screw 6. When the fixed plate 2 is moved by the lead screw 6, the bolts between the position adjusting plate 1 and the fixed plate 2 are first loosened. During the movement of the fixed plate 2, the bolts slide along the adjusting elongated hole. When it reaches the correct position, the bolts are then retightened.

[0036] When using this invention, before quenching begins, the handwheel 12 is rotated to move the lead screw 6 axially, thereby moving the fixed plate 2 and the connected roller mounting seat 4 and rollers 5 towards the shaft workpiece 200. When the two rollers 5 on the roller mounting seat 4 contact the axial surface of the corresponding shaft workpiece 200, the position adjusting plate 1 and the fixed plate 2 are fixed with bolts. During the quenching process, the paired rollers 5 can limit the position of the shaft workpiece 200, restricting its thermal deformation. Therefore, by adjusting the lead screw 6, the movement of the rollers 5 can be controlled within a wide range to accommodate different diameters of the shaft workpiece 200.

[0037] Still with Figure 2 For reference, to ensure good directional movement of the fixed plate 2 driven by the lead screw 6 and to avoid skewing, a guide mechanism is provided on each of the left and right sides of the lead screw 6. The guide mechanism includes a guide sleeve and a guide rod 9 that slide together. The guide sleeve is preferably a self-lubricating copper sleeve 8 to reduce friction with the guide rod 9. The self-lubricating copper sleeve 8 passes through and is fixed to the window connecting plate 100, and the guide rod 9 passes through the self-lubricating copper sleeve 8 and is fixed to the fixed plate 2. In other embodiments, a linear bearing can be used instead of the guide sleeve to cooperate with the guide rod 9, thus providing a guiding function.

[0038] This embodiment has two roller mounting seats 4, which can simultaneously perform induction hardening and deformation limiting on two shaft workpieces 200.

[0039] In other embodiments, only one roller mounting base 4 may be provided, mounting a pair of rollers 5 for induction hardening of a shaft workpiece 200 to limit deformation. In this case, the aforementioned guide mechanism may not be necessary.

[0040] In other embodiments, multiple shaft workpiece deformation limiting mechanism assemblies as described in this invention can be set along the length of the shaft workpiece on the induction hardening machine tool to solve the problem of excessive deformation of ultra-slender shafts during hardening.

[0041] Therefore, the deformation limiting mechanism of this utility model can be appropriately adjusted during the design of the quenching machine tool according to the specific length and size of the workpiece to be quenched, so as to achieve optimal deformation limiting of the workpiece.

[0042] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the specific implementation of this utility model with reference to the above embodiments. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model are within the protection scope of the pending claims.

Claims

1. A shaft workpiece deformation limiting mechanism assembly for a shaft-type induction hardening machine tool, characterized in that: Includes a lead screw, one end of which is threadedly connected to a lead screw nut, which can be connected to a shaft-type induction hardening machine tool. The optical shaft portion on the lead screw passes through a through hole in a fixed plate and can rotate within the through hole. The other end of the lead screw extends out from the through hole. A lead screw support is fixed to the end of the through hole of the fixed plate. A bearing that is axially limited is provided inside the lead screw support. The lead screw passes through the bearing and is connected to the bearing. A roller mounting base is fixedly connected to the fixed plate. A pair of freely rotating rollers are arranged side by side on the roller mounting base at the end opposite to the lead screw nut. The line connecting the axes of the two rollers is perpendicular to the axis of the lead screw. The position adjustment plate has a vertical plate surface and a horizontal plate surface. The vertical plate surface is used to connect with the shaft-type induction hardening machine tool, and the horizontal plate surface is used to fix the plate to the fixed plate by bolts. The bolt connection holes on the horizontal plate surface or the fixed plate are adjustment elongated holes, and the length direction of the adjustment elongated holes is parallel to the lead screw.

2. The shaft workpiece deformation-limiting mechanism assembly of claim 1, wherein: It also includes a cylinder, the cylinder body of which is fixedly connected to the fixed plate, and the cylinder rod end of which is fixedly connected to the roller mounting seat.

3. The shaft workpiece deformation limiting mechanism assembly according to claim 1, characterized in that: The lead screw support seat is provided with a stepped surface for axially limiting the bearing. The bearing is also provided with retaining rings on both sides, which are sleeved on the lead screw. The retaining ring on the inner side abuts against the shoulder of the lead screw, and the retaining ring on the outer side is tightened against the bearing by a nut installed on the lead screw.

4. The shaft workpiece deformation limiting mechanism assembly according to claim 1, characterized in that: A handwheel is installed at one end of the lead screw extending from the lead screw support seat.

5. The shaft workpiece deformation limiting mechanism assembly according to claim 1, characterized in that: A baffle is fixed to the end face of the lead screw that is used to connect with the lead screw nut, and the diameter of the baffle is larger than the diameter of the lead screw.

6. The shaft workpiece deformation limiting mechanism assembly according to any one of claims 1 to 5, characterized in that: The fixed plate is provided with the roller mounting seat.

7. The shaft workpiece deformation limiting mechanism assembly according to any one of claims 1 to 5, characterized in that: The fixed plate is provided with two roller mounting seats, which are distributed on the left and right sides of the lead screw.

8. The shaft workpiece deformation limiting mechanism assembly according to claim 7, characterized in that: It also includes two guiding mechanisms, which are distributed on both sides of the lead screw. The two relatively movable parts of the guiding mechanisms are respectively connected to the fixed plate and the shaft-type induction hardening machine tool.

9. The shaft workpiece deformation-limiting mechanism assembly of claim 8, wherein: The guiding mechanism includes a slidingly fitted guide sleeve and guide rod or a linear bearing and guide rod, wherein the guide rod is fixedly connected to the fixed plate, and the guide sleeve or linear bearing is fixedly connected to the shaft-type induction hardening machine tool.

10. The shaft workpiece deformation-limiting mechanism assembly of claim 9, wherein: The guide sleeve is a self-lubricating copper sleeve.

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