Composite clamp with adjustable eccentricity of self-centering chuck

Abstract

The utility model discloses a composite clamp with a self-centering chuck capable of adjusting eccentricity, which relates to the technical field of chucks and comprises a three-jaw self-centering chuck, a chuck connecting disc and a spindle connecting disc, the spindle connecting disc is fixedly connected with a spindle of a machine tool, and the three-jaw self-centering chuck is fixedly mounted on the chuck connecting disc through a cylindrical head screw. A groove is formed in the side wall face, away from the three-jaw self-centering chuck, of the chuck connecting disc, the main shaft connecting disc is arranged in the groove, and a plurality of flat-end set screws moving in the radial direction of the chuck connecting disc are connected to the side wall of the groove in a screwed mode. For irregular eccentric workpieces, the workpieces need to be clamped on the three-jaw self-centering chuck firstly, then the eccentricity is adjusted, in this way, batch machining of the irregular workpieces can be achieved, the clamping and adjusting time is shortened, the machining efficiency is improved, and machining of workpieces of different specifications within a larger range can be met through cooperation of the three-jaw self-centering chuck and the three-jaw self-centering chuck.

Description

Technical Field

[0001] The utility model relates to the technical field of chucks, in particular to a composite fixture with an adjustable eccentric self-centering chuck, which is a tooling fixture for grinding the outer circle, inner hole, end face, etc. of non-metallic materials such as quartz, ceramics, and silicon in the semiconductor industry, and can clamp rod-shaped, pipe-shaped, and disc-shaped workpieces. Background Technique

[0002] At present, the processing of quartz ceramic rod materials, pipe materials, and disc materials in the domestic semiconductor industry mainly relies on manual three-jaw self-centering chucks or four-jaw independent chucks. For regular workpieces, the existing chucks can be directly clamped, but for irregular or eccentric batch workpieces, they are not applicable, and special tooling fixtures need to be made, with high design and production costs, inconvenient disassembly, replacement, and adjustment, and low efficiency. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a composite fixture with an adjustable eccentric self-centering chuck, which can be used for self-centering or adjusting the eccentricity, and the two are independently adjusted without affecting each other, and is suitable for the processing and clamping of various shaped parts.

[0004] To achieve the above purposes, the utility model is realized through the following technical solutions: A composite fixture with an adjustable eccentric self-centering chuck, including a three-jaw self-centering chuck, a chuck connection disc, and a spindle connection disc. The spindle connection disc is fixedly connected to the machine tool spindle. The three-jaw self-centering chuck is fixedly installed on the chuck connection disc by using socket head cap screws. A groove is provided on the side wall of the chuck connection disc away from the three-jaw self-centering chuck. The spindle connection disc is placed in the groove. A plurality of flat-end set screws that move along the radial direction of the chuck connection disc are screwed on the side wall of the groove. One end of the flat-end set screw abuts against the circumferential outer surface of the spindle connection disc. A secondary positioning component is further provided between the spindle connection disc and the chuck connection disc. The secondary positioning component includes a mounting hole and a hexagon head bolt. The mounting hole is opened on the spindle connection disc. The hexagon head bolt passes through the mounting hole and is screwed on the chuck connection disc. The diameter of the mounting hole is larger than the diameter of the hexagon head bolt.

[0005] Preferably, the moving distance of the chuck connection disc in the radial direction on the spindle connection disc is not greater than 2 mm.

[0006] Preferably, the number of the flat-end set screws is four and they are evenly distributed in the circumferential direction of the chuck connection disc.

[0007] Advantageous Effects

[0008] The utility model provides a composite fixture with adjustable eccentricity for a self-centering chuck, which has the following beneficial effects: The composite fixture is designed to be able to both achieve self-centering clamping of workpieces and achieve eccentric clamping of workpieces. For regular and symmetric workpieces, the workpiece can be directly clamped by the manual three-jaw self-centering chuck at the front end. For irregular workpieces with eccentricity, the workpiece needs to be first clamped on the three-jaw self-centering chuck and then the eccentricity is adjusted. In this way, batch processing of irregular workpieces can be realized, the clamping and adjustment time can be reduced, and the processing efficiency can be improved. The cooperation of the two can meet the processing of different specifications of workpieces within a larger range. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a schematic internal structure view of the side of the utility model;

[0010] Figure 2 is Figure 1 the sectional view taken along A-A in

[0011] In the figure: 1, three-jaw self-centering chuck; 2, chuck connecting plate; 3, spindle connecting plate; 4, cylinder head screw; 5, hexagon head bolt; 6, flat-end set screw; 7, mounting hole; 8, machine tool spindle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0013] Please refer to Figure 1-2, the present utility model provides a technical solution: a composite fixture with adjustable eccentricity for a self - centering chuck, which includes a three - jaw self - centering chuck 1, a chuck connecting disk 2, and a spindle connecting disk 3. The spindle connecting disk 3 is fixedly connected to the machine tool spindle 8. The three - jaw self - centering chuck 1 is fixedly installed on the chuck connecting disk 2 using socket head cap screws 4. A groove is provided on the side wall of the chuck connecting disk 2 away from the three - jaw self - centering chuck 1. The spindle connecting disk 3 is placed in the groove. A plurality of flat - end set screws 6 that move in the radial direction of the chuck connecting disk 2 are screwed on the side wall of the groove. One end of the flat - end set screw 6 abuts against the circumferential outer surface of the spindle connecting disk 3. The radial relative position between the spindle connecting disk 3 and the chuck connecting disk 2 is restricted by the flat - end set screws 6. A secondary positioning component is also provided between the spindle connecting disk 3 and the chuck connecting disk 2; the secondary positioning component includes a mounting hole 7 and a hexagon head bolt 5. The mounting hole 7 is opened on the spindle connecting disk 3. The hexagon head bolt 5 passes through the mounting hole 7 and is screwed on the chuck connecting disk 2. The diameter of the mounting hole 7 is larger than the diameter of the hexagon head bolt 5, enabling the hexagon head bolt 5 to move within the mounting hole 7. After tightening the hexagon head bolt 5, the friction between the chuck connecting disk 2 and the spindle connecting disk 3 can be increased, achieving a secondary positioning effect; the radial movement distance of the chuck connecting disk 2 on the spindle connecting disk 3 is not greater than 2 mm; the number of flat - end set screws 6 is four and they are evenly distributed in the circumferential direction of the chuck connecting disk 2.

[0014] Embodiment: According to the attached drawings of the specification Figure 1-2 As can be seen, when in use, the whole set of composite fixture is fastened to the machine tool spindle 8 through the spindle connecting disk 3. When eccentricity adjustment is required, loosen the hexagon head bolt 5 with a wrench, that is, loosen the connection between the chuck connecting disk 2 and the spindle connecting disk 3. At this time, adjust the four adjustment screws, namely the flat - end set screws 6, to achieve four - point adjustment of the eccentricity direction and distance. The maximum adjusted eccentricity distance is not greater than 2 mm. After adjustment, tighten the hexagon head bolt 5 to fix the chuck connecting disk 2 and the spindle connecting disk 3, completing the adjustment.

[0015] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A composite fixture with a self-centering chuck and adjustable eccentricity, characterized in that: The invention comprises a three-jaw self-centering chuck (1), a chuck connecting plate (2), and a spindle connecting plate (3); the spindle connecting plate (3) is fixedly connected to a machine tool spindle (8); the three-jaw self-centering chuck (1) is fixedly mounted on the chuck connecting plate (2) by means of a cylindrical head screw (4); a groove is provided on a side wall of the chuck connecting plate (2) away from the three-jaw self-centering chuck (1); the spindle connecting plate (3) is placed in the groove; a plurality of flat-end set screws that move in the radial direction of the chuck connecting plate (2) are screwed on the side wall of the groove. (6), one end of the flat-end set screw (6) abuts against the circumferential outer surface of the spindle connecting disk (3), and a secondary positioning component is also arranged between the spindle connecting disk (3) and the chuck connecting disk (2), and the secondary positioning component includes a mounting hole (7) and a hexagonal head bolt (5), the mounting hole (7) is opened on the spindle connecting disk (3), the hexagonal head bolt (5) passes through the mounting hole (7) and is screwed on the chuck connecting disk (2), and the diameter of the mounting hole (7) is larger than the diameter of the hexagonal head bolt (5).

2. A composite fixture with a self-centering chuck and adjustable eccentricity according to claim 1, characterized in that: The radial movement distance of the chuck connection plate (2) on the spindle connection plate (3) is no more than 2 mm.

3. A composite fixture with a self-centering chuck and adjustable eccentricity according to claim 1, characterized in that: The number of the flat-end set screws (6) is four and they are evenly distributed in the circumferential direction of the chuck connecting plate (2).

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