A high-precision rear-pull film power chuck for high-end CNC equipment

Abstract

The present invention discloses a high-precision rear-pull film power chuck for high-end numerical control equipment, comprising a chuck body, a film disc, a limit pull block, claws, and a center pull bolt. A film disc is provided at the front end of the chuck body, and the outer ring of the film disc is fixedly connected to the outer ring of the chuck body by a plurality of bolts. A plurality of claws are provided on the outer ring of the film disc on a side away from the chuck body, and the claws are equidistantly arranged around the center of the film disc. The present invention arranges a film disc on the chuck body, and drives the film disc to contract to clamp the claws. The chuck is convenient for clamping workpieces, and the workpiece is fixed more stably and firmly. The chuck has a center water outlet and an airtightness detection function. The center water outlet can automatically cool the workpiece, protect the workpiece and the tool chuck, and increase the practical life of the tool disc and the tool. The "elastic recovery" of the film is used for clamping, and the film has excellent repeat positioning accuracy. The processing of gears of different sizes can be coped with by replacing different claws.

Description

[Technical field]

[0001] The invention relates to the technical field of chucks, in particular to the technical field of back-pull film power chucks. [Background technology]

[0002] A chuck is a mechanical device used to clamp a workpiece on a machine tool. It is a machine tool accessory that uses the radial movement of the movable jaws evenly distributed on the chuck body to clamp and position the workpiece. A chuck generally consists of three parts: a chuck body, movable jaws, and a jaw drive mechanism. The chuck body has a minimum diameter of 65 mm and a maximum diameter of 1500 mm. There is a through hole in the center to allow the workpiece or bar to pass through. The back has a cylindrical or short conical structure that is directly or through a flange to connect to the end of the machine tool spindle. Chucks are usually installed on lathes, external cylindrical grinders, and internal cylindrical grinders. They can also be used in conjunction with various indexing devices for milling machines and drilling machines. A film chuck is a type of chuck. A film chuck is a high-precision self-centering clamping device that uses a diaphragm as an elastic element to clamp the workpiece. Existing film chucks are mostly arranged as a whole with a diaphragm and jaws. Moreover, the shape of the diaphragm is complex, making it inconvenient to clamp the chuck and not convenient to pick up and place the workpiece. [Summary of the invention]

[0003] The purpose of the present invention is to solve the problems in the prior art and to propose a high-precision rear-pull film power chuck for high-end CNC equipment, which can conveniently clamp the workpiece, and the workpiece is fixed more stably and firmly. At the same time, it has a central water outlet and airtightness detection function, which can automatically cool the workpiece and protect the workpiece and the tool chuck.

[0004] To achieve the above-mentioned purpose, the present invention proposes a high-precision rear-pulling film power chuck for high-end CNC equipment, comprising a chuck body, a film disk, a limit pull block, claws, and a center pull bolt. A film disk is provided at the front end of the chuck body, and the outer ring of the film disk is fixedly connected to the outer ring of the chuck body by a plurality of bolts. A plurality of claws are provided on the outer ring of the film disk on the side away from the chuck body, and the claws are equidistantly arranged around the center of the film disk. A center pull bolt is horizontally provided at the center of the chuck body, and the center pull bolt is slidably connected to the chuck body. A limit pull block that can cooperate with the film disk is provided on the end of the center pull bolt close to the film disk, and the limit pull block is fixedly connected to the center of the film disk.

[0005] Preferably, a positioning block that can cooperate with the workpiece is provided in the center of the film disk, and a plurality of positioning pillars are provided between the positioning block and the film disk. One end of the positioning pillar passes through the film disk and is fixedly connected to the chuck body, and the positioning pillars are equidistantly arranged at the center of the film disk.

[0006] Preferably, a plurality of sealing rings are provided between the limit pull block and the film disk and the positioning block.

[0007] Preferably, a plurality of central water outlet holes are provided at the center of the positioning block, and a pull-bolt water outlet through hole which can cooperate with the central water outlet holes is provided at the center of the central pull-bolt.

[0008] Preferably, the positioning block is provided with an airtight detection hole, and the limiting pull block is provided with a limiting pull block vent hole that can cooperate with the airtight detection hole.

[0009] Preferably, a core shaft is sleeved on the central pull bolt, the core shaft is slidably connected to the chuck body, and one end of the core shaft is fixedly connected to the limiting pull block.

[0010] Preferably, a flange for connecting to a machine tool spindle is provided on the side of the chuck body away from the film disk.

[0011] Preferably, the chuck body and the flange are fixedly connected by a plurality of bolts, the chuck body and the film disk are both provided with bolt through holes that can cooperate with the bolts, and the upper end of the bolt through hole of the film disk is provided with a sealing cover for sealing.

[0012] Preferably, the chuck body is provided with a plurality of weight-reducing grooves, and the weight-reducing grooves are equidistantly arranged around the center of the chuck body.

[0013] The invention discloses a high-precision rear-pull film power chuck for high-end numerical control equipment with beneficial effects: the invention arranges a film disk on the chuck body, and drives the film disk to contract to clamp the claws, so that the chuck is convenient for clamping the workpiece, and the workpiece is fixed more stably and firmly. The chuck has a center water outlet and an airtightness detection function. The center water outlet can automatically cool the workpiece, protect the workpiece and the tool chuck, and increase the practical life of the tool disk and the tool. The elastic recovery of the film is used for clamping, and it has excellent repeat positioning accuracy. Different claws can be replaced to cope with the processing of gears of different sizes.

[0014] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the structure of a high-precision rear-pull film power chuck of a high-end CNC equipment of the present invention, a front view and a cross-sectional view;

[0016] Figure 2 It is a front view of a schematic diagram of the film disk structure of a high-precision rear-pull film power chuck of a high-end numerical control device of the present invention.

[0017] In the figure: 1-chuck body, 2-film disc, 3-limiting pull block, 4-claw, 5-positioning block, 6-positioning pillar, 7-flange, 8-center pull bolt, 9-weight reduction groove, 10-sealing cover, 11-core shaft, 12-bolt through hole, 31-limiting pull block vent hole, 51-center water outlet hole, 52-air tightness detection hole, 81-pull bolt water outlet through hole. [Specific implementation method]

[0018] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the scope of the present invention. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0019] See also Figure 1 , Figure 2, the present invention discloses a high-precision rear-pull film power chuck for high-end numerical control equipment, comprising a chuck body 1, a film disc 2, a limit pull block 3, a clamping claw 4, and a center pull bolt 8. The front end of the chuck body 1 is provided with a film disc 2, and the outer ring of the film disc 2 is fixedly connected to the outer ring of the chuck body 1 by a plurality of bolts. The outer ring of the film disc 2 on the side away from the chuck body 1 is provided with a plurality of clamping claws 4, and the clamping claws 4 are equidistantly arranged around the center of the film disc 2. A center pull bolt 8 is transversely arranged at the center of the chuck body 1, and the center pull bolt 8 is slidably connected to the chuck body 1. A limit pull block 3 that can cooperate with the film disc 2 is provided on the end of the center pull bolt 8 close to the film disc 2, and the limit pull block 3 is fixedly connected to the center of the film disc 2. A positioning block 5 that can cooperate with a workpiece is provided at the center of the film disc 2. A plurality of positioning pillars 6 are provided between the positioning block 5 and the film disc 2, and one end of the positioning pillar 6 passes through the film disc 2 and is fixedly connected to the chuck body 1. The positioning pillars 6 are equidistantly arranged at the center of the film disc 2. A plurality of sealing rings 12 are arranged between the film disk 2 and the positioning block 5. The center of the positioning block 5 is provided with a plurality of central water outlet holes 51. The center of the central pull bolt 8 is provided with a pull bolt water outlet through hole 81 which can cooperate with the central water outlet hole 51. The positioning block 5 is provided with an airtight detection hole 52. The limit pull block 3 is provided with a limit pull block vent hole 31 which can cooperate with the airtight detection hole 52. The center pull bolt 8 is sleeved with a core shaft 11, and the core shaft 11 is slidably connected to the chuck body 1. The core shaft 11 is The end is fixedly connected with the limiting pull block 3, and a flange 7 for connecting to the machine tool spindle is provided on the side of the chuck body 1 away from the film disk 2. The chuck body 1 and the flange 7 are fixedly connected by a plurality of bolts. The chuck body 1 and the film disk 2 are both provided with bolt through holes 12 that can cooperate with the bolts. A sealing cover 10 for sealing is provided on the upper end of the bolt through hole 12 of the film disk 2. The chuck body 1 is provided with a plurality of weight reducing grooves 9, and the weight reducing grooves 9 are equidistantly arranged around the center of the chuck body 1.

[0020] Working process of the present invention:

[0021] The high-precision rear-pull film power chuck of high-end numerical control equipment of the present invention fixes the flange 7 to the main shaft of the machine tool during operation, and the movement process is as follows: the workpiece is placed on the positioning block 5, the center pull bolt 8 moves to the right to drive the core shaft 11 and the limit pull block 3 to release the film elasticity of the film disk 2, so that the film disk elasticity is restored to loosen the workpiece; the center pull bolt 8 moves to the left to pull the film disk 2 to shrink through the core shaft 11 and the limit pull block 3, and the shrinkage of the film disk 2 drives the clamping claw 4 to clamp the workpiece.

[0022] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. A high-precision back-pulling film power chuck for high-end CNC equipment, characterized by: The invention comprises a chuck body (1), a film disc (2), a limit pull block (3), claws (4), and a center pull bolt (8), wherein the front end of the chuck body (1) is provided with a film disc (2), the outer ring of the film disc (2) is fixedly connected to the outer ring of the chuck body (1) by a plurality of bolts, the outer ring of the film disc (2) on the side away from the chuck body (1) is provided with a plurality of claws (4), the claws (4) are arranged equidistantly around the center of the film disc (2), the center of the chuck body (1) is provided with a center pull bolt (8) transversely, the center pull bolt (8) is slidably connected to the chuck body (1), the end of the center pull bolt (8) close to the film disc (2) is provided with a limit pull block (3) that can cooperate with the film disc (2), the limit pull block (3) is fixedly connected to the center of the film disc (2); the film disc ( 2) A positioning block (5) capable of cooperating with a workpiece is provided at the center, a plurality of positioning pillars (6) are provided between the positioning block (5) and the film disk (2), one end of the positioning pillar (6) passes through the film disk (2) and is fixedly connected to the chuck body (1), and the positioning pillars (6) are equidistantly arranged at the center of the film disk (2); a plurality of sealing rings (12) are provided between the limiting pull block (3) and the film disk (2) and the positioning block (5); a plurality of central water outlet holes (51) are provided at the center of the positioning block (5), and a pull bolt water outlet through hole (81) capable of cooperating with the central water outlet hole (51) is provided at the center of the central pull bolt (8); an airtightness detection hole (52) is provided on the positioning block (5), and a limiting pull block vent hole (31) capable of cooperating with the airtightness detection hole (52) is provided on the limiting pull block (3).

2. A high-precision back-pulling film power chuck for high-end CNC equipment as claimed in claim 1, characterized in that: The central pull bolt (8) is sleeved with a core shaft (11), the core shaft (11) is slidably connected to the chuck body (1), and one end of the core shaft (11) is fixedly connected to the limit pull block (3).

3. A high-precision back-pulling film power chuck for high-end CNC equipment as claimed in claim 1, characterized in that: A flange (7) for connecting to a machine tool spindle is provided on the side of the chuck body (1) away from the film disc (2).

4. A high-precision back-pulling film power chuck for high-end CNC equipment as claimed in claim 1, characterized in that: The chuck body (1) and the flange (7) are fixedly connected by a plurality of bolts. The chuck body (1) and the film disk (2) are both provided with bolt through holes (12) that can cooperate with the bolts. The upper end of the bolt through hole (12) of the film disk (2) is provided with a sealing cover (10) for sealing.

5. A high-precision back-pulling film power chuck for high-end CNC equipment as claimed in claim 1, characterized in that: The chuck body (1) is provided with a plurality of weight-reducing grooves (9), and the weight-reducing grooves (9) are arranged at equal distances around the center of the chuck body (1).

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