Modularized quick-change high-speed rotating clamp

Abstract

The utility model relates to a modularized quick-change high-speed rotating clamp which is connected with a main shaft of a machine tool, is coaxial with the main shaft of the machine tool and rotates synchronously with the main shaft of the machine tool, and comprises a connecting module, a clamping module, an end face positioning flange and a tensioning module in sequence from the rear end to the front end, the connecting module comprises a machine tool spindle nose end, a broach structure support, a broach structure and a blind rivet shaft, the broach structure and the blind rivet shaft are located in the broach structure support, the clamping module sequentially comprises a clamp body, a CAPTO outer taper, a CAPTO outer taper and a connecting shaft from outside to inside, and the clamp body is of a cylindrical structure; the CAPTO outer taper is fixedly connected with the clamp body and the CAPTO inner taper through bolts, the tensioning module comprises a fixed end cover, a positioning disc, a mandrel, a coupling ring, a tensioning sleeve and an expansion sleeve, the front end of the mandrel is a cone, the cone extends into a cavity defined by the expansion sleeve, the expansion sleeve is expanded or shrunk, and then clamping operation on the clamp is completed. The module is reasonable in layout, more accurate in butt joint and quicker in disassembly.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing fixture accessories, in particular to a modular quick-change high-speed rotating fixture. Background Technique

[0002] With the continuous breakthrough of technology, the machine tools used for metal processing are also changing with each passing day in terms of processing speed, processing accuracy, processing automation and processing functions. Some fixtures supporting the machine tools have also developed closely with the machine tools, gradually transitioning from the traditional manual fixture replacement method to automation and then to modularization. This transformation has improved the positioning repeat accuracy of the fixture, reduced the fixture replacement time, and simplified the fixture replacement process. However, for the current modular fixtures, the module layout is unreasonable, and more precise disassembly and precise docking cannot be achieved. Content of the Utility Model

[0003] The utility model aims at the above problems and provides a modular quick-change high-speed rotating fixture with a reasonable module layout, more precise docking and faster disassembly.

[0004] The technical solution of the utility model is: a modular quick-change high-speed rotating fixture, which is connected to the main shaft of the machine tool and rotates coaxially and synchronously with the main shaft of the machine tool. The fixture sequentially includes a connection module, a clamping module, an end face positioning flange and a tensioning module from the rear end to the front end. The connection module includes a machine tool main shaft, a broach structure bracket, a broach structure located inside the broach structure bracket and a pull stud shaft. The clamping module sequentially includes a fixture body, a CAPTO outer taper, a CAPTO inner taper, a pull stud adapter sleeve, a circumferential insertion groove and a connecting shaft from the outside to the inside. The fixture body is of a cylindrical structure. The CAPTO outer taper is fixedly connected to the fixture body and the CAPTO inner taper respectively by bolts. The tensioning module includes a fixed end cover, a positioning disk, a mandrel, a coupling ring, a tensioning sleeve and a swelling sleeve. The front end of the mandrel is a cone, and the cone extends into the cavity surrounded by the swelling sleeve. The connection module and the clamping module are fixedly connected by an internal broach structure. The fixture body and the end face positioning flange are fixedly connected by internal hexagonal bolts. The end face positioning flange and the tensioning module are fixedly connected by a locking screw 7.

[0005] Further improvement of the above solution: a circumferential connection groove is provided at the front end of the pull stud shaft, a circumferential insertion groove is provided at the rear end of the connecting shaft, the broach structure is an annular elastic structure, and convex structures extend inward at both ends thereof, namely a front convex structure and a rear convex structure. The front convex structure is inserted into the circumferential connection groove, and the rear convex structure is inserted into the circumferential insertion groove.

[0006] Further improvement of the above solution: a washer is installed on one side of the broach structure close to the front convex structure, and a buffer groove is provided at the middle position of the outer wall of the broach structure.

[0007] Further improvement to the above solution: The end interface of the hexagon socket head cap screw is a triangular cone.

[0008] Further improvement to the above solution: A compression circumferential groove is provided at one end of the screw rod of the hexagon socket head cap screw close to the end mechanism.

[0009] Further improvement to the above solution: A butterfly compression piece is fixed at one end of the screw rod of the hexagon socket head cap screw close to the end face positioning flange.

[0010] Further improvement to the above solution: A circumferential clamping groove is provided on the end face positioning flange.

[0011] Further improvement to the above solution: A connecting groove is provided on one side of the expansion sleeve close to the coupling ring for fixedly connecting with the coupling ring.

[0012] Compared with the prior art, the beneficial effects brought by the present utility model are as follows:

[0013] Adopting a layout method of multiple module structures, it is convenient to disassemble: including a connection module, a clamping module and a tensioning module. Each module can be disassembled separately and will not affect other modules, facilitating targeted replacement and maintenance operations, saving processing time and reducing production costs;

[0014] Quick-connect broach structure. The broach structure is fixed in the circumferential connection groove of the broach shaft and slides into the circumferential insertion groove provided at the rear end of the connection shaft through the push of the main shaft, thus realizing the quick connection between the connection module and the clamping module, which is efficient and accurate;

[0015] The fixture body and the end face positioning flange are fixedly connected by a hexagon socket head cap screw. The end structure of the hexagon socket head cap screw adopts the triangular cone design of the Capto tool handle, which can realize double-sided positioning, eliminate the dynamic balance problem caused by the transmission key and the keyway, and improve the machining accuracy and stability. Description of the Drawings

[0016] Figure 1 is the front view of the present utility model;

[0017] Figure 2 is the perspective view of the present utility model;

[0018] Figure 3 is the sectional view of the present utility model;

[0019] Figure 4 is Figure 3 the enlarged view of part A in

[0020] Figure 5 is the internal view of the connection of the broach shaft, broach structure and connection shaft of the present utility model;

[0021] Figure 6 This is a schematic structural diagram of the hexagon socket head cap screw of the present utility model.

[0022] Reference numerals:

[0023] Connection module 1: Machine tool spindle 11, nose end of machine tool spindle 111, broach structure support 12, broach structure 13, front convex structure 131, rear convex structure 132, washer 133, buffer groove 134, broach shaft 14, circumferential connection groove 141

[0024] Clamping module 2: Fixture body 21, CAPTO external taper 22, CAPTO internal taper 23, broach adapter sleeve 24, circumferential insertion groove 241, connection shaft 25

[0025] End face positioning flange 3: Circumferential clamping groove 31

[0026] Tightening module 4: Fixed end cover 41, positioning disk 42, mandrel 43, cone 431, coupling ring 44, tightening sleeve 45, expanding sleeve 46

[0027] Butterfly compression piece 5

[0028] Hexagon socket head cap screw 6, end interface 61, compression circumferential groove 62

[0029] Locking screw 7

[0030] Part positioning end 8 Specific implementation manners

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0032] Please refer to Figures 1-3As shown in the figure, a modular quick-change high-speed rotating fixture is connected to the spindle of a machine tool and rotates coaxially and synchronously with the spindle of the machine tool. The fixture sequentially includes a connection module 1, a clamping module 2, an end face positioning flange 3, and a tensioning module 4 from the rear end to the front end. The connection module 1 includes a machine tool spindle 11, a broach structure support 12, a broach structure 13 located inside the broach structure support 12, and a pull stud shaft 14. The clamping module 2 sequentially includes a fixture body 21, a CAPTO internal taper 23, a CAPTO external taper 22, a pull stud adapter sleeve 24, and a connecting shaft 25 from the outside to the inside. The fixture body 21 is a cylindrical structure. The CAPTO external taper 22 is fixedly connected to the fixture body 21 and the CAPTO internal taper 23 by bolts respectively. The end face positioning flange 3 is provided with a circumferential clamping groove 31, which is convenient for a mechanical gripper to grasp and then perform an installation operation. The tensioning module 4 includes a fixed end cover 41, a positioning disk 42, a mandrel 43, a coupling ring 44, a tensioning sleeve 45, and a expanding sleeve 46. The front end of the mandrel 43 is a cone 431, and the cone 431 extends into the cavity surrounded by the expanding sleeve 46. The side of the expanding sleeve 46 close to the coupling ring 44 is provided with a connecting groove 461 for fixedly connecting with the coupling ring 44. The connection module 1 and the clamping module 2 are fixedly connected by the internal broach structure 13. The fixture body 21 and the end face positioning flange 3 are fixedly connected by an internal hexagonal bolt 6. The end face positioning flange 3 and the tensioning module 4 are fixedly connected by a locking screw 7.

[0033] A circumferential connection groove 141 is provided at the front end of the pull stud shaft 14, and a circumferential insertion groove 241 is provided at the rear end of the connecting shaft 25. The broach structure 13 is an annular elastic structure, and both ends thereof extend inwardly with protruding structures, namely a front protruding structure 131 and a rear protruding structure 132 respectively. The front protruding structure 131 is inserted into the circumferential connection groove 141, and the rear protruding structure 132 is inserted into the circumferential insertion groove 241. A washer 133 is installed on the side of the broach structure 13 close to the front protruding structure 131, and a buffer groove 134 is provided at the middle position of the outer wall of the broach structure 13.

[0034] The end interface 61 of the internal hexagonal bolt 6 is a triangular cone, and a compression circumferential groove 62 is provided at one end of the screw rod close to the end mechanism 61, and a butterfly compression piece 5 is fixed at one end of the screw rod close to the end face positioning flange 3.

[0035] The related working principle of the modular quick-change high-speed rotating fixture is as follows:

[0036] 1. Working principle of the clamping and releasing process. The whole fixture is positioned at the nose end 111 of the machine tool spindle and fastened by screws, and rotates at high speed together with the machine tool. The drawbar of the machine tool spindle pulls the drawbolt shaft 14 to the left. The flange head conical surface at the right end of the drawbolt shaft 14 pulls the broach structure 13, causing the jaws of the opened broach structure 13 to contract, clamp the flange head of the drawbolt adapter sleeve 24 and move to the left. The threads at the right end of the drawbolt adapter sleeve 24 are interconnected with the threads of the connecting shaft 25, pulling the mandrel 43 to the left. The mandrel 43 pulls the coupling ring 44, and the coupling ring 44 pulls the expansion sleeve 46, causing the outer diameter of the inner cone of the expansion sleeve 46 to expand under the cooperation of the outer cone of the mandrel 43, thereby tightening the inner hole of the workpiece;

[0037] Conversely, when the drawbar of the machine tool spindle 11 pushes the moving drawbolt shaft 14 to the right, the transmission process is the same as above, which is the process of loosening the workpiece.

[0038] Working principle of the overall quick change process of the fixture: 111 is the nose end of the machine tool spindle. The machine tool rotates by itself and cannot and does not need to be disassembled. After the fixture body 21 is accurately adjusted and fastened to the machine tool spindle 11, it is no longer disassembled. After the fixture body 21 is accurately adjusted and fastened to the CAPTO internal taper 23, it is no longer disassembled; The CAPTO external taper 22 is used as the external taper positioning. After the CAPTO external taper 22 is accurately adjusted and fastened to the end face positioning flange 3, it is no longer disassembled. Then, the end face positioning flange 3 and all the parts fastened to the end face positioning flange 3 can be disassembled and installed as a whole; The quick locking and loosening of the end face positioning flange 3 and the machine tool spindle 11 are implemented by the hexagon socket head bolt structure. This structure has directionality. Only when it is at the same angle as the fixture body 21 can it be loosened and the end face positioning flange 3 (including the whole) can be disassembled. Conversely, it can be installed and locked.

[0039] 3. Working principle of the quick change process of the fixture mandrel or chuck: There is no need for scattered disassembly. Only the locking screw 7 needs to be disassembled and assembled to disassemble the fixed end cover 41 and the whole connected to it. Conversely, it is the installation operation process.

[0040] The end face positioning flange 3 can be the mandrel in the drawing, or a three-jaw chuck, a collet chuck, an end face driver, etc., which can be connected to part 3.

[0041] 4. Working principle of the quick change process of the clamping module: In this process, only the locking screw 7 needs to be disassembled and assembled. The part positioning end 8 and the coupling ring 44 are loosened in sequence to replace the expansion sleeve of the same type but different outer diameter sizes. Conversely, first install the expansion sleeve 46, the coupling ring 44, and the part positioning end 8, and then lock the screw 7 to complete the quick change process.

[0042] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A modular quick-change high-speed rotating fixture is connected to the spindle of a machine tool and rotates coaxially and synchronously with the spindle of the machine tool. The fixture sequentially includes a connection module, a clamping module, an end face positioning flange, and a tensioning module from the rear end to the front end, and is characterized in that: The connecting module includes a machine tool spindle, a broach structure bracket, a broach structure located inside the broach structure bracket, and a pull stud shaft. The clamping module sequentially includes a fixture body, a CAPTO outer taper, a CAPTO inner taper, a pull stud adapter sleeve, a circumferential insertion groove, and a connecting shaft from outside to inside. The fixture body is a cylindrical structure. The CAPTO outer taper is fixedly connected to the fixture body and the CAPTO outer taper respectively by bolts. The tensioning module includes a fixed end cover, a positioning disc, a mandrel, a coupling ring, a tensioning sleeve, and a expanding sleeve. The front end of the mandrel is a cone, and the cone extends into the cavity surrounded by the expanding sleeve. The connecting module and the clamping module are fixedly connected by the internal broach structure. The fixture body and the end face positioning flange are fixedly connected by internal hexagonal bolts. The end face positioning flange and the tensioning module are fixedly connected by locking screws.

2. The modular quick-change high-speed rotary fixture according to claim 1, characterized in that: A circumferential connection groove is provided at the front end of the pull stud shaft, and a circumferential insertion groove is provided at the rear end of the connecting shaft. The broach structure is an annular elastic structure, and convex structures extend inward at both ends thereof, namely a front convex structure and a rear convex structure. The front convex structure is inserted into the circumferential connection groove, and the rear convex structure is inserted into the circumferential insertion groove.

3. The modular quick-change high-speed rotating fixture according to claim 2, characterized in that: A washer is installed on one side of the broach structure close to the front convex structure, and a buffer groove is provided at the middle position of the outer wall of the broach structure.

4. The modular quick-change high-speed rotating jig according to claim 1, characterized in that: The end interface of the internal hexagonal bolt is a triangular cone.

5. The modular quick-change high-speed rotating fixture according to claim 4, characterized in that: A compression circumferential groove is provided at one end of the screw of the internal hexagonal bolt close to the end mechanism.

6. The modular quick-change high-speed rotary fixture according to any one of claims 4 or 5, characterized in that: A butterfly compression piece is fixed at one end of the screw of the internal hexagonal bolt close to the end face positioning flange.

7. A modular quick-change high-speed rotating fixture according to claim 1, characterized in that: A circumferential clamping groove is provided on the end face positioning flange.

8. The modular quick-change high-speed rotary fixture according to claim 1, characterized in that: A connection groove is provided on one side of the expanding sleeve close to the coupling ring for fixedly connecting with the coupling ring.

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