Guiding pull claw type rotary thin-walled workpiece clamp and machining machine tool

Abstract

The utility model provides a guide pull claw type rotary thin-walled workpiece clamp and a machining tool. The guide pull claw type rotary thin-walled workpiece clamp comprises a flange, a positioning ring, a connector, a pull claw and a clamp body. A plurality of spring pieces are mounted on the upper plane of the clamp body, the flange is mounted at the bottom of the clamp body, and the positioning ring arranged above the flange is mounted in the clamp body in a fastening manner; the connector is installed in the clamp body, the pull claws are installed on the peripheral side of the top end of the connector, the ends of the pull claws extend to the position above the clamp body, the connector is in transmission connection with the pull claws, and the pull claws can be matched to clamp or loosen machined parts. The degree of freedom of the clamp body in the axial direction and the rotation direction is limited through the positioning ring, the pulling claws are synchronously driven to be opened, tightened and clamped and loosened in the axial direction to a large extent through the connector, machined parts are accurately positioned through various limiting structures, and therefore the machining precision and the stability of batch production are improved; the mechanical structure is simple, manufacturing difficulty is low, and input cost is saved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical processing tools, in particular to a guide claw type rotary thin-walled workpiece fixture and a processing machine tool. Background Art

[0002] With the continuous development of society, the concepts of a green planet, environmental protection, and sustainable development are increasingly being implemented. This is specifically reflected in the reduction of pollution by conserving materials in mechanical components. This practical environmental approach has led to increasingly lighter parts and thinner walls. However, these thin-walled parts, due to their poor rigidity, are easily deformed, and their complex shapes make clamping extremely difficult in traditional machining.

[0003] The existing Chinese patent publication number is CN215699890U, which discloses a processing fixture for thin-walled parts, including a shell and a main support column slidably installed inside the shell, a support plate is provided on the main support column with a floating sleeve, and a plurality of connecting rods uniformly distributed circumferentially are provided on the support plate, and a pull rod is installed at the free end of each connecting rod that slides with the shell, and the pull rod extends out of the top of the shell and is provided with a floating connected pressure claw assembly, which is hinged to the top of the shell, and the bottom of the main support column is connected to a power device.

[0004] The clamping method and position of existing fixtures often cause deformation and damage to parts, resulting in insufficient product processing precision and instability in mass production. Therefore, the inventors believe it is necessary to provide a guide-claw rotary fixture for thin-walled parts. By changing the clamping method and position, the strength of the parts is improved, deformation during processing is reduced, and the processing precision and mass production stability of the products are greatly improved. Utility Model Content

[0005] In view of the defects in the prior art, the purpose of the present invention is to provide a guide claw type rotary thin-walled parts fixture and a processing machine tool.

[0006] According to the utility model, a guide claw type rotary thin-walled workpiece clamp is provided, comprising: a flange, a positioning ring, a connector, a claw and a clamp body;

[0007] The upper plane of the clamp body is equipped with a plurality of spring sheets for pre-positioning and pre-clamping the processed parts. The flange is installed at the bottom of the clamp body. The positioning ring arranged above the flange is fastened to the inside of the clamp body.

[0008] The connector is installed inside the fixture body, and multiple claws are respectively installed on the top side of the connector. The ends of the claws extend to the top of the fixture body. The connector is transmission-connected to the claws, and multiple claws can cooperate to clamp or release processed parts.

[0009] Preferably, a countersunk plane is formed at the bottom of the clamp body, and the positioning ring is fastened to the countersunk plane of the clamp body by a plurality of bolts. The positioning ring can limit the axial and rotational freedom of the clamp body.

[0010] Preferably, the flange and the positioning ring are both sleeved on the outside of the connector, and the inner wall of the connector is connected to the machine tool pull rod through threads.

[0011] Preferably, the outer circle of the clamp body is provided with a plurality of vertical grooves, and the plurality of pulling claws are respectively arranged in the vertical grooves.

[0012] Preferably, a guide groove is provided on the pulling claw, and a plurality of pin holes are correspondingly provided on the side surface of the clamp body. A guide pin is inserted into any of the pin holes, and the guide pin passes through the guide groove and slides with the guide groove.

[0013] Preferably, the three pulling claws are evenly distributed on the circumference of the connector, the three spring sheets are evenly distributed on the upper plane of the clamp body, and the pulling claws are spaced apart from the spring sheets.

[0014] Preferably, the spring piece is L-shaped, and the bottom is mounted on the upper plane of the clamp body through a fastener. The vertical piece of the spring piece is tilted, and the top end thereof is tilted toward the outside of the clamp body.

[0015] Preferably, a plurality of support seats are installed on the upper plane of the fixture body, and the plurality of support seats cooperate to support the processed parts.

[0016] Preferably, a plurality of adjustable positioning pins and fixed positioning pins are installed on the upper plane of the clamp body, and the adjustable positioning pins and the fixed positioning pins cooperate to limit the radial rotation of the processing component.

[0017] According to a processing machine tool provided by the utility model, the above-mentioned guide claw type rotary thin-walled workpiece clamp is adopted.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The utility model can limit the axial and rotational freedom of the clamp body through the positioning ring, and can realize the synchronous driving of the pulling claw to a large extent of radial opening, tightening and axial clamping and loosening through the connector, and the guide pin passes through the pin hole on the side of the clamp body and the guide groove of the pulling claw at the same time, and the opening, tightening and limiting of the range of movement of the pulling claw are realized through the gap between the guide pin and the guide groove, and the processing parts are accurately positioned through various limiting structures such as spring sheets, support seats, adjustable positioning pins and fixed positioning pins, thereby improving the processing accuracy of the product and the stability of mass production; the mechanical structure is simple and the manufacturing difficulty is low, and the investment of additional hydraulic stations and rotary oil circuit distributors is avoided. The overall clamp price can be greatly reduced, saving the clamp investment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0021] Figure 1 This is a cross-sectional view of a guide claw type rotary thin-walled parts fixture mainly embodied in the present invention;

[0022] Figure 2 This is an exploded view of the assembly of a guide claw type rotary thin-walled parts fixture, which is mainly embodied in the utility model.

[0023] Reference numerals:

[0024] Flange 1 Locating ring 2 Connector 3

[0025] Guide pin 4 Pull claw 5 Clamp body 6

[0026] Spring sheet 7 Support seat 8 Adjustable positioning pin 9

[0027] Fixed positioning pin 10 Processing parts 11 DETAILED DESCRIPTION

[0028] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art further understand the present invention, but are not intended to limit the present invention in any way. It should be noted that a person skilled in the art may make various variations and improvements without departing from the scope of the present invention. Such variations and improvements are all within the scope of protection of the present invention.

[0029] Example 1

[0030] like Figure 1 and 2As shown, a guide claw type rotary thin-walled parts fixture provided by the utility model includes: a flange 1, a positioning ring 2, a connector 3, a claw 5 and a fixture body 6; the upper plane of the fixture body 6 is equipped with multiple spring sheets 7 for pre-positioning and pre-clamping the processing parts 11, the flange 1 is installed at the bottom of the fixture body 6, and the positioning ring 2 arranged above the flange 1 is fastened to the inside of the fixture body 6; the connector 3 is installed inside the fixture body 6, and multiple claws 5 are respectively installed on the top circumferential side of the connector 3, and the end of the claw 5 extends to the top of the fixture body 6, the connector 3 is connected to the claw 5 by transmission, and the multiple claws 5 can cooperate to clamp or release the processing parts 11.

[0031] Flange 1 generally adopts A2-6 flange, and flange 1 is positioned and installed with the nose end of CNC lathe spindle and connected with fixture body 6. Further, flange 1 is installed on the nose end of spindle of CNC lathe or turning center and adopts double fitting of conical surface and flat surface.

[0032] The bottom of the fixture body 6 is formed with a countersunk surface, and the locating ring 2 is fastened to the countersunk surface of the fixture body 6 using multiple bolts. The locating ring 2 is installed on the countersunk surface in the fixture body 6 and is connected and locked with three M8 hexagon socket head cap bolts with a strength of 12.9 to limit the axial and rotational degrees of freedom.

[0033] Flange 1 and locating ring 2 are both mounted on the outside of connector 3, the inner wall of which is connected to the machine tool's drawbar via threads. Connector 3 has internal threads that connect directly to the machine tool's drawbar, and the forward and reverse movement of the machine tool's rotary cylinder synchronously drives the claw 5 to clamp and release the workpiece 11.

[0034] The outer circumference of the clamp body 6 is defined by multiple vertical slots, within which multiple claws 5 are positioned. The claws 5 are provided with guide slots, and the sides of the clamp body 6 are correspondingly provided with multiple pin holes. Each pin hole is fitted with a guide pin 4, which passes through and slidably engages with the guide slots. The claws 5 are mounted within the vertical slots of the outer circumference of the clamp body 6. The slots on the claws 5 are aligned with the pin holes on the sides of the clamp body 6. The guide pins 4 pass through the pin holes on the sides of the clamp body 6 and the guide slots of the claws 5, passing through the gap between the guide pins 4 and the guide slots to achieve and limit their range of motion.

[0035] The three pulling claws 5 are evenly distributed on the circumference of the connector 3 , and the three spring sheets 7 are evenly distributed on the upper plane of the clamp body 6 . The pulling claws 5 and the spring sheets 7 are spaced apart.

[0036] The spring piece 7 is L-shaped, and the bottom is mounted on the upper plane of the clamp body 6 through a fastener. The vertical piece of the spring piece 7 is tilted, and its top end is tilted toward the outside of the clamp body 6.

[0037] The upper plane of the fixture body 6 is equipped with multiple support seats 8, which cooperate to support the processing parts 11. The support seats 8 are installed on the upper plane of the fixture body 6, with a total of 3 locations, for axial positioning of the processing parts 11.

[0038] The upper surface of the fixture body 6 is mounted with a plurality of adjustable locating pins 9 and fixed locating pins 10, which cooperate to limit radial rotation of the workpiece 11. The adjustable locating pins 9 and fixed locating pins 10 are mounted on the flat surface of the fixture body 6 to precisely position the workpiece 11 within the circular locating hole and prevent radial rotation.

[0039] The utility model can limit the axial and rotational freedom of the clamp body 6 through the positioning ring 2, and can realize the synchronous driving of the pulling claw 5 to a large extent of radial opening, tightening and axial clamping and loosening through the connector 3, and the guide pin 4 simultaneously passes through the pin hole on the side of the clamp body 6 and the guide groove of the pulling claw 5, and the opening, tightening and limiting of the range of movement of the pulling claw 5 are realized through the gap between the guide pin 4 and the guide groove, and the processing parts 11 are accurately positioned by more than ten limiting structures such as the spring sheet 7, the support seat 8, the adjustable positioning pin 9 and the fixed positioning pin 10, thereby improving the processing accuracy of the product and the stability of mass production; the mechanical structure is simple and the manufacturing difficulty is low, and the investment of additional hydraulic stations and rotary oil circuit distributors is avoided. The overall clamp price can be greatly reduced, saving the clamp investment cost.

[0040] This application has a simple and effective structure, low price, convenient and practical operation, and can easily ensure the position tolerance of the processed part and the blank of rotating thin-walled parts, avoiding the difficulty of clamping thin-walled parts or deformation during clamping, as well as the use of expensive and complex fixtures. It can be widely used in turning, milling, drilling, and reaming of various rotating thin-walled parts. Through this fixture, the process is centralized and the shape error of each hole and surface is guaranteed to be less than 0.01.

[0041] Example 2

[0042] Based on Example 1, a processing machine tool provided by the present invention adopts the guide claw type rotary thin-walled workpiece fixture of Example 1. The guide claw type rotary thin-walled workpiece fixture is a fixture suitable for lathe processing of thin-walled workpieces and can be used on a CNC lathe or a turning center.

[0043] The present application realizes a large radial opening, tightening and axial clamping and loosening of the claw 5 through a simple mechanical structure, has low manufacturing difficulty, avoids the investment of additional hydraulic stations and rotary oil circuit distributors, and the overall clamp price can be greatly reduced, saving the clamp investment cost.

[0044] The present application can complete the radial opening, tightening and axial clamping and loosening of the three claws 5 by using a pull rod of a rotary cylinder attached to the machine tool spindle and connected to a floating mechanism, which can avoid the use of three rotary cylinders and avoid the clamping deformation of parts caused by the asynchronous clamping action of the three cylinders, thereby ensuring the shape accuracy of the hole in the hole.

[0045] This application avoids tool interference during part processing through structural simplification, thereby obtaining a larger processing space. The multiple processes that originally required turning, drilling, reaming, and milling can now be completed in one go through this application, avoiding the time loss and precision loss caused by process conversion, thereby providing better processing costs and better part shape and position accuracy.

[0046] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0047] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A guide claw type rotary thin-walled parts fixture, characterized in that: include: Flange (1), positioning ring (2), connector (3), pulling claw (5) and clamp body (6); A plurality of spring sheets (7) for pre-positioning and pre-clamping the processed parts (11) are installed on the upper plane of the clamp body (6); the flange (1) is installed at the bottom of the clamp body (6); and the positioning ring (2) arranged above the flange (1) is fastened and installed inside the clamp body (6); The connector (3) is installed inside the clamp body (6), and the plurality of pull claws (5) are respectively installed on the top peripheral side of the connector (3). The ends of the pull claws (5) extend above the clamp body (6). The connector (3) is transmission-connected to the pull claws (5), and the plurality of pull claws (5) can cooperate to clamp or release the processed parts (11).

2. The guide claw type rotary thin-walled parts clamp according to claim 1, characterized in that: A countersunk plane is formed at the bottom of the clamp body (6), and the positioning ring (2) is fastened and mounted on the countersunk plane of the clamp body (6) by a plurality of bolts. The positioning ring (2) can limit the axial and rotational freedom of the clamp body (6).

3. The guide claw type rotary thin-walled parts clamp according to claim 1, characterized in that: The flange (1) and the positioning ring (2) are both sleeved on the outside of the connector (3), and the inner wall of the connector (3) is connected to the machine tool pull rod via a thread.

4. The guide claw type rotary thin-walled parts clamp according to claim 1, characterized in that: The outer circle of the clamp body (6) is provided with a plurality of vertical slots, and the plurality of pulling claws (5) are respectively arranged in the vertical slots.

5. The guide claw type rotary thin-walled parts clamp according to claim 1, characterized in that: A guide groove is provided on the pulling claw (5), and a plurality of pin holes are correspondingly provided on the side of the clamp body (6). A guide pin (4) is inserted into any of the pin holes, and the guide pin (4) passes through the guide groove and slides with the guide groove.

6. The guide claw type rotary thin-walled parts clamp according to claim 1, characterized in that: The three pulling claws (5) are evenly distributed on the peripheral side of the connector (3), the three spring sheets (7) are evenly distributed on the upper plane of the clamp body (6), and the pulling claws (5) and the spring sheets (7) are spaced apart.

7. The guide claw type rotary thin-walled parts clamp according to claim 1, characterized in that: The spring piece (7) is L-shaped, and the bottom is mounted on the upper plane of the clamp body (6) through a fastener. The vertical piece of the spring piece (7) is tilted, and the top end thereof is tilted toward the outside of the clamp body (6).

8. The guide claw type rotary thin-walled parts clamp according to claim 1, characterized in that: A plurality of support seats (8) are installed on the upper plane of the clamp body (6), and the plurality of support seats (8) cooperate to support the processing parts (11).

9. The guide claw type rotary thin-walled parts clamp according to claim 1, characterized in that: A plurality of adjustable positioning pins (9) and fixed positioning pins (10) are installed on the upper plane of the clamp body (6); the adjustable positioning pins (9) and the fixed positioning pins (10) cooperate to limit the radial rotation of the processing component (11).

10. A processing machine tool, characterized in that: A guide claw type rotary thin-walled parts clamp as described in any one of claims 1 to 9 is used.

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