Composite turning and milling center chucking device

Abstract

A kind of composite center chuck clamping device of milling, it is related to clamping device technical field, solve the problem of insufficient adhesion and clamping force in prior art, and inconvenient replacement.The clamping device includes chuck assembly, the chuck assembly includes shell, chuck body and multiple slides;The female chuck is connected on the slide, the end of the female chuck is connected with the male chuck, the end of the male chuck away from the female chuck is arc structure, the male chuck is detachably connected with the female chuck by bolt, and the female chuck is detachably connected with the slide by bolt.The beneficial effect is: the male chuck can be quickly replaced, the center adjustment time is reduced, the adhesion of different specifications of crankshaft is guaranteed, and the labor intensity of replacement is reduced.

Description

Technical Field

[0001] This utility model relates to the field of clamping device technology, specifically to a composite milling and turning center chuck clamping device. Background Technology

[0002] The composite milling and turning center (model HTM1251000) is responsible for machining multiple processes on crankshafts of N26, N26A, ZC270, N28, N330, and N350 series diesel engines, including precision cutting, radius cutting, arm milling, surface milling, thread milling, and straight / slanted oil hole machining. It plays an irreplaceable role in the crankshaft machining process. Due to insufficient clamping fit and clamping force, the pneumatic chuck will experience asynchronous problems between SP1 (headstock) and SP2 (tailstock) when clamped during crankshaft machining. When milling surfaces and radius angles, the machine tool is subjected to high force, and the crankshaft's follow-up synchronization is poor, leading to quality accidents. Currently, the machine is constantly stopped during machining for observation by marking, which not only affects machining efficiency but also poses a great risk to quality. In addition, the current clamping device is bulky, with one clamping device weighing 200kg. Changing to different models of crankshafts requires center adjustment, which is time-consuming and inaccurate positioning, resulting in insufficient fit and clamping force.

[0003] In summary, existing clamping devices have significant differences in the diameter of crankshafts of different specifications, and their fit and clamping force are insufficient. In addition, they are bulky, heavy, have long replacement times, and require a lot of labor.

[0004] Therefore, this utility model proposes a composite milling and turning center chuck clamping device to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of this utility model is to provide a composite milling and turning center chuck clamping device to solve the problems of insufficient fit and clamping force of existing clamping devices, and inconvenience in replacement.

[0006] The technical solution adopted by this utility model to solve its technical problem is: A composite milling and turning center chuck clamping device includes a chuck assembly. The chuck assembly includes a housing, a chuck body, and multiple slides. The chuck body is rotatably connected to the housing. A large bevel gear is connected to the bottom surface of the chuck body, and the large bevel gear meshes with a small bevel gear. A drive shaft is coaxially connected to the small bevel gear, and the drive shaft is rotatably connected to the housing. A planar thread is connected to the top surface of the chuck body, and the bottom of each slide meshes with the planar thread. A female collet is connected to each slide, and a female collet is connected to the end of the female collet. The end of the female collet away from the female collet has an arc-shaped structure. The female chuck has a first protrusion and a first groove at one end corresponding to the male chuck. The first protrusion and the first groove are vertically arranged. The male chuck has a second groove and a second protrusion corresponding to the first protrusion and the first groove, respectively. The male chuck is detachably connected to the female chuck by bolts. The female chuck has a first toothed protrusion and a third groove at one side corresponding to the slide. The first toothed protrusion and the third groove are vertically arranged. The slide has a second toothed groove and a fourth protrusion corresponding to the first toothed protrusion and the third groove, respectively. The female chuck is detachably connected to the slide by bolts.

[0007] Furthermore, two elastic compensation members are symmetrically arranged inside the sub-clamp. The inner arc surface of the elastic compensation member is flush with the inner arc surface of the arc structure, and a compression spring is provided between the outer arc surface of the elastic compensation member and the sub-clamp.

[0008] Furthermore, multiple anti-slip blocks are provided on the inner arc surface of both the elastic compensation component and the arc-shaped structure.

[0009] Furthermore, both the elastic compensation component and the inner arc surface of the arc structure are provided with a wear-resistant coating, which is tungsten carbide.

[0010] Furthermore, the sub-clamp has a hollow cavity inside, and a cross-shaped reinforcing rib is provided inside the hollow cavity. The sub-clamp is made of high-strength aluminum alloy.

[0011] Furthermore, the end of the female clamp facing the male clamp is provided with a sealing groove, and a dustproof sealing ring is provided in the sealing groove.

[0012] Furthermore, the housing is provided with multiple positioning grooves, all of which are coaxially arranged with the housing. The bottom wall of each positioning groove is provided with anti-slip texture, and the diameter of the multiple positioning grooves increases sequentially along the extension direction of the axis.

[0013] By adopting the above technical solution, it is possible to achieve this.

[0014] In summary, compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model allows for the replacement of the sub-clamp with a corresponding arc-shaped inner radius by disassembling the connecting bolts between the sub-clamp and the female clamp. The vertically arranged first boss and first groove ensure accurate circumferential and radial positioning. The toothed engagement of the first toothed boss and the second toothed groove, and the toothed engagement of the third groove and the fourth boss enhance connection stability and ensure accurate positioning. It can quickly complete the matching of the clamp and the crankshaft diameter, reducing the center adjustment time. The detachable connection allows for quick replacement of the sub-clamp, ensuring a good fit for crankshafts of different specifications and reducing the labor intensity of replacement.

[0015] 2. This utility model can select a positioning groove with a corresponding diameter on the housing according to the model and shaft diameter specifications of the crankshaft to be processed, and initially place one end of the crankshaft in the positioning groove. The anti-slip texture on the bottom wall of the positioning groove is used to achieve initial anti-slip positioning and reduce axial displacement during clamping.

[0016] 3. The crankshaft surface of this invention can compress the elastic compensating component inside the chuck. The elastic compensating component compresses the compression spring on its outer arc surface, adapting to the unevenness of the crankshaft surface through elastic deformation. This ensures that the elastic compensating component and the inner arc surface of the arc structure are tightly fitted to the crankshaft surface, improving the fit. Simultaneously, during processing, the elastic compensating component can absorb some of the impact force through the elastic buffer of the compression spring, reducing the vibration of the crankshaft caused by force and improving the follow-up synchronization.

[0017] 4. The elastic compensation component and the anti-slip block on the inner arc surface of the arc structure of this utility model increase the coefficient of friction, and the tungsten carbide wear-resistant coating can reduce slippage during the clamping process and enhance the clamping force.

[0018] 5. The hollow cavity and cross-shaped reinforcing rib of the sub-clamp of this utility model can reduce the weight of the sub-clamp while ensuring structural strength, and facilitate manual replacement of the sub-clamp.

[0019] 6. The dustproof sealing ring on the connection surface of the female chuck and the male chuck of this utility model can prevent machining debris and coolant from entering the connection gap and avoid impurities from affecting the chuck fitting accuracy. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is the front view of the present invention; Figure 3 for Figure 2 A schematic diagram of the AA cross-section; Figure 4 for Figure 3 A magnified view of part A; Figure 5 This is a partial cross-sectional view of the main view of this utility model; Figure 6 for Figure 5 A magnified view of part B; Figure 7 This is an exploded view of part of the structure of this utility model; In the diagram: 1. Housing; 2. Chuck body; 3. Slide; 4. Large bevel gear; 5. Small bevel gear; 6. Drive shaft; 7. Flat thread; 8. Female chuck; 9. Female chuck; 10. First boss; 11. First groove; 12. Second groove; 13. Second boss; 14. First toothed boss; 15. Third groove; 16. Second toothed groove; 17. Fourth boss; 18. Elastic compensation component; 19. Compression spring; 20. Anti-slip block; 21. Wear-resistant coating; 22. Hollow cavity; 23. Cross-shaped reinforcing rib; 25. Sealing groove; 26. Dustproof sealing ring; 27. Positioning groove; 28. Anti-slip texture. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] In this application, the terms "upper," "inner," "outer," "middle," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0023] like Figure 1-7 As shown, a composite milling and turning center chuck clamping device includes a chuck assembly, which includes a housing 1, a chuck body 2, and multiple slides 3. The chuck body 2 is rotatably connected inside the housing 1. The housing 1 has multiple positioning grooves 27, which are all coaxially arranged with the housing 1. The bottom wall of each positioning groove 27 is provided with anti-slip textures 28. The diameter of the multiple positioning grooves 27 increases sequentially along the extension direction of the axis. A large bevel gear 4 is connected to the bottom surface of the chuck body 2, and the large bevel gear 4 meshes with a small bevel gear 5. A drive shaft 6 is coaxially connected to the small bevel gear 5, and the drive shaft 6 is rotatably connected to the housing 1. A planar thread 7 is connected to the top surface of the chuck body 2, and the bottom of each slide 3 meshes with the planar thread 7. A female collet 8 is connected to each slide 3, and a male collet 9 is connected to the end of the female collet 8. The end of the male collet 9 away from the female collet 8 has an arc-shaped structure.

[0024] Furthermore, two elastic compensation elements 18 are symmetrically arranged inside the sub-clamp 9. The inner arc surface of the elastic compensation element 18 is flush with the inner arc surface of the arc-shaped structure, and a compression spring 19 is provided between the outer arc surface of the elastic compensation element 18 and the sub-clamp 9. Multiple anti-slip blocks 20 are provided on both the elastic compensation element 18 and the inner arc surface of the arc-shaped structure. A wear-resistant coating 21, which is tungsten carbide, is provided on both the elastic compensation element 18 and the inner arc surface of the arc-shaped structure.

[0025] Furthermore, the sub-clamp 9 has a hollow cavity 22 inside, and a cross-shaped reinforcing rib 23 is provided inside the hollow cavity 22. The sub-clamp 9 is made of high-strength aluminum alloy. The end of the female clamp 8 facing the sub-clamp 9 has a sealing groove 25, and a dustproof sealing ring 26 is provided inside the sealing groove 25.

[0026] Furthermore, the female collet 8 has a first protrusion 10 and a first groove 11 at one end corresponding to the male collet 9. The first protrusion 10 and the first groove 11 are arranged vertically. The male collet 9 has a second groove 12 and a second protrusion 13 corresponding to the first protrusion 10 and the first groove 11, respectively. The male collet 9 is detachably connected to the female collet 8 by bolts. The female collet 8 has a first toothed protrusion 14 and a third groove 15 at one side corresponding to the slide block 3. The first toothed protrusion 14 and the third groove 15 are arranged vertically. The slide block 3 has a second toothed groove 16 and a fourth protrusion 17 corresponding to the first toothed protrusion 14 and the third groove 15, respectively. The female collet 8 is detachably connected to the slide block 3 by bolts.

[0027] The working process of this utility model is as follows: If the crankshaft diameter does not match the arc-shaped structure of the sub-clamp 9, the connecting bolts between the sub-clamp 9 and the female clamp 8 can be removed. The positioning fit between the first boss 10 and the first groove 11 of the female clamp 8 and the second groove 12 and the second boss 13 of the sub-clamp 9 allows for the replacement of the sub-clamp 9 with a corresponding arc-shaped inner radius. The vertically positioned first boss 10 and first groove 11 ensure accurate circumferential and radial positioning. For larger adjustments, the detachable connection between the female clamp 8 and the slide 3 allows for the replacement of a suitable female clamp 8 assembly. The toothed fit between the first toothed boss 14 and the second toothed groove 16, and the third groove 15 and the fourth boss 17 enhances connection stability and ensures accurate positioning, quickly matching the clamp with the crankshaft diameter and reducing center adjustment time. The detachable connection also allows for quick replacement of the sub-clamp 9, reducing labor intensity.

[0028] Then, based on the model and diameter specifications of the crankshaft to be processed, a positioning groove 27 with the corresponding diameter is selected on the housing 1. One end of the crankshaft is initially placed in the positioning groove 27. The anti-slip texture 28 on the bottom wall of the positioning groove 27 is used to achieve initial anti-slip positioning and reduce axial offset during clamping. Then, the drive device is started to drive the drive shaft 6 to rotate. The drive shaft 6 drives the small bevel gear 5 to rotate. The small bevel gear 5 meshes with the large bevel gear 4 at the bottom of the chuck body 2, driving the chuck body 2 to rotate synchronously within the housing 1. The flat thread 7 on the top surface of the chuck body 2 rotates synchronously and then meshes with the flat thread 7. Multiple slide blocks 3 move synchronously radially. The helical drive of the planar thread 7 ensures consistent movement of all slide blocks 3. The slide blocks 3 then drive the female collet 8 and the male collet 9 closer to the crankshaft axis. The arc-shaped structure of the male collet 9 contacts the crankshaft surface, and the slide blocks 3 continue to move. The crankshaft surface presses against the elastic compensation element 18 inside the male collet 9. The elastic compensation element 18 compresses the compression spring 19 on its outer arc surface, adapting to the unevenness of the crankshaft surface through elastic deformation. This ensures that the elastic compensation element 18 and the inner arc surface of the arc structure closely adhere to the crankshaft surface, improving the fit. Simultaneously, the anti-slip block 20 of the elastic compensation element 18 and the inner arc surface of the arc structure increase the coefficient of friction, and the tungsten carbide wear-resistant coating 21 reduces slippage during clamping, enhancing the clamping force.

[0029] Furthermore, during the machining process, the elastic compensation component 18 can absorb part of the impact force through the elastic buffer of the compression spring 19, reducing the vibration of the crankshaft caused by the force and improving the follow-up synchronization. The hollow cavity 22 and the cross-shaped reinforcing rib 23 of the sub-clamp 9 can reduce the weight of the sub-clamp 9 while ensuring structural strength, and facilitate manual replacement of the sub-clamp 9. The dustproof sealing ring 26 on the connection surface between the female clamp 8 and the sub-clamp 9 can prevent machining debris and coolant from entering the connection gap, avoiding impurities from affecting the clamp fit accuracy.

Claims

1. A composite milling and turning center chuck clamping device, comprising a chuck assembly, characterized in that, The chuck assembly includes a housing (1), a chuck body (2), and multiple slides (3). The chuck body (2) is rotatably connected inside the housing (1). A large bevel gear (4) is connected to the bottom surface of the chuck body (2). The large bevel gear (4) meshes with a small bevel gear (5). A drive shaft (6) is coaxially connected to the small bevel gear (5). The drive shaft (6) is rotatably connected to the housing (1). A planar thread (7) is connected to the top surface of the chuck body (2). The bottom of each slide (3) meshes with the planar thread (7). A female collet (8) is connected to each slide (3). A female collet (9) is connected to the end of the female collet (8). The end of the female collet (9) away from the female collet (8) has an arc-shaped structure. The female chuck (8) has a first boss (10) and a first groove (11) at one end corresponding to the male chuck (9). The first boss (10) and the first groove (11) are arranged vertically. The male chuck (9) has a second groove (12) and a second boss (13) respectively corresponding to the first boss (10) and the first groove (11). The male chuck (9) is detachably connected to the female chuck (8) by bolts. The female chuck (8) has a first toothed boss (14) and a third groove (15) on one side corresponding to the slide (3). The first toothed boss (14) and the third groove (15) are arranged vertically. The slide (3) has a second toothed groove (16) and a fourth boss (17) respectively corresponding to the first toothed boss (14) and the third groove (15). The female chuck (8) is detachably connected to the slide (3) by bolts.

2. The composite milling and turning center chuck clamping device according to claim 1, characterized in that, Two elastic compensation members (18) are symmetrically arranged inside the sub-clamp (9). The inner arc surface of the elastic compensation member (18) is flush with the inner arc surface of the arc structure. A compression spring (19) is provided between the outer arc surface of the elastic compensation member (18) and the sub-clamp (9).

3. The composite milling and turning center chuck clamping device according to claim 2, characterized in that, Multiple anti-slip blocks (20) are provided on the inner arc surface of the elastic compensation component (18) and the arc structure.

4. The composite milling and turning center chuck clamping device according to claim 3, characterized in that, The elastic compensation component (18) and the inner arc surface of the arc structure are both provided with a wear-resistant coating (21), and the wear-resistant coating (21) is tungsten carbide.

5. The composite milling and turning center chuck clamping device according to claim 1, characterized in that, The sub-clamp (9) has a hollow cavity (22) inside, and a cross-shaped reinforcing rib (23) is provided inside the hollow cavity (22). The sub-clamp (9) is made of high-strength aluminum alloy.

6. The composite milling and turning center chuck clamping device according to claim 1, characterized in that, The female chuck (8) has a sealing groove (25) at one end facing the male chuck (9), and a dustproof sealing ring (26) is provided in the sealing groove (25).

7. The composite milling and turning center chuck clamping device according to claim 1, characterized in that, The housing (1) is provided with a plurality of positioning grooves (27), all of which are coaxially arranged with the housing (1). The bottom wall of each positioning groove (27) is provided with anti-slip texture (28), and the diameter of the plurality of positioning grooves (27) increases sequentially along the extension direction of the axis.

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