CN101612707B - Clamp for numerical control machining - Google Patents

Abstract

The invention discloses a clamp for numerical control machining, which mainly includes a clamp body, several positioning elements and a clamping device, the clamp body is positioned and clamped on the T-shaped groove of a rotary worktable, and the positioning key is fixed on the bottom of the clamp body Cooperate with the T-shaped slot; a cover plate is installed on the upper part of the clamp body, and a V-shaped block is positioned on the inner side of the left end of the clamp body; two positioning plates are installed on the rear side of the clamp body; the edge of the right end of the clamp body is installed There is a vertical fulcrum, and a clamping plate that can rotate around the fulcrum, and the rotation of the clamping plate is controlled by the clamping device on the clamping body. The invention can quickly locate and clamp, and the positioning accuracy is greatly improved. And the fixture has a definite position on the rotary worktable, so the workpiece coordinate system is also completely definite, which greatly improves the work efficiency.

Description

Fixtures for CNC Machining

Technical field:

The invention relates to a numerical control machining tool, in particular to a precise and convenient clamp specially used for numerical control machining.

Background technique:

With the rapid development of computer technology, fundamental changes have taken place in the traditional manufacturing industry. Using CNC machine tools to process products has a good quality consistency, and the machining accuracy and efficiency are much higher than ordinary machine tools, especially when the contour is different. When processing regular, complex curves or curved surfaces, multi-process composite processing and products requiring high precision, its advantages are unmatched by traditional machine tools.

The fixture is an important part of the CNC machining center. Its function is to fix the workpiece at the exact position of the machine tool and complete various processing of the workpiece. It must be positioned accurately and clamped reliably. Obviously, the advantages and disadvantages of its structure have a great impact on the machining accuracy. , Machining efficiency has a crucial impact; there are very few special fixtures for CNC machining, and it is difficult to find them in the data and on the Internet. Position some pad irons and angle irons, and then clamp them with flat vise. It is necessary to measure and set the workpiece coordinate system during processing, so the work efficiency is low and the positioning accuracy is not high. And one clamping can only process the processing surface of one orientation of the workpiece.

Invention content:

The present invention aims at the above-mentioned problems existing in the clamps used in the existing numerical control machine tools, and provides a fast positioning and clamping of the parts, without measuring the coordinate system of the workpiece during processing, and the clamp can be rotated in multiple directions to process multiple workpieces. Surface specific fixture.

In order to achieve the above object, the clamp for numerical control machining involved in the present invention mainly includes a clamp body, several positioning elements and clamping devices, the clamp body is positioned and clamped on the T-shaped slot of the rotary table, and the positioning The key is fixed on the bottom of the clamp body to match the T-shaped groove; a cover plate is positioned on the upper part of the clamp body, and a V-shaped block is positioned on the inner surface of the left end of the clamp body; two positioning plates are installed on the rear side of the clamp body; Specifically, a vertical fulcrum and a clamping plate that can rotate around the fulcrum are installed on the edge of the right end, and the rotation of the clamping plate is controlled by the clamping device on the clamping body.

The upper part of the vertical support shaft has a groove for placing the elastic ring on the inner side close to the clamp body, a sleeve for padding the clamping plate is placed at the lower part of the vertical support shaft, and a gasket for preventing wear of the workbench is placed at the bottom of the vertical support shaft .

The clamping device is a screw that is screwed into the clamp body and can withstand the clamping plate.

Compared with the straightening and clamping of the flat vise, the clamp obtained according to the above technical scheme can be quickly positioned and clamped, and the positioning accuracy is greatly improved. And the fixture has a definite position on the rotary worktable, so the workpiece coordinate system is also completely definite, which greatly improves the work efficiency. And one clamping can process the processing surface of the workpiece in multiple directions.

Description of drawings:

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is the front view of the present invention.

Figure 2 is an isometric view and a partial view of the present invention.

Fig. 3 is a left side view and a cross-sectional view of the present invention.

Fig. 4 is a right side view and a top view of the present invention.

Fig. 5 is a structural schematic diagram of the support sleeve.

Fig. 6 is a schematic view of the installation of the support sleeve according to the present invention.

Detailed ways:

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

In order to solve the problems existing in the existing clamps, the clamp provided by the present invention is mainly shown in FIG. 1 to FIG. 4 , and the whole system mainly includes a clamp body, several positioning elements and clamping devices. The two positioning keys 16 are fixed on the bottom of the clamp body 1 with screws to match the T-shaped slot to position the clamp body on the workbench. The hexagonal head of the bolt 10 passes through the T-shaped slot, and the screw part passes through the bottom plate of the clamp body 1. Put the T-shaped slot on the top into the washer 12 and tighten it with the nut 11, and fix the clamp body on the T-shaped slot of the rotary table.

As shown in Figures 1, 2, and 3, a cover plate 3 is placed on the upper part of the clamp body 1, which is firstly positioned by two pins 4 in the middle of both ends, and then fixed by four screws 5 at the four corners. Position and clamp a V-shaped block 2 on the inner surface of the left end of the clamp body 1, and the V-shaped block 2 is positioned on the clamp body 1 by two pins 19, and then fixed with screws 20 (as shown in Figure 3). Two positioning plates 18 are installed on the rear side of the clamp body 1, and the positioning plates 18 are respectively fixed on the clamp body 1 by three screws 17 (as shown in FIG. 1 ). A vertical fulcrum 7 is installed on the edge of the right end of the clamp body, and a clamping plate 6 that can rotate around the fulcrum, and the rotation of the clamping plate 6 is controlled by a screw that is screwed into the clamp body and can withstand the clamping plate 6 9. Through such a device, the clamping plate 6 has two functions: one is to clamp the workpiece, and the other is to limit the rotational freedom of the workpiece in the Y direction. The upper part of the vertical support shaft 7 has a groove on the inner side close to the clamp body 1 to place the circlip 14 to prevent the vertical support shaft 7 from being pulled out from the upper part; a sleeve 15 is placed on the lower part of the vertical support shaft 7 to pad the clamping plate 6 , Put a pad 13 at the bottom of the vertical support shaft 7 to prevent wear and tear on the workbench.

The clamp obtained according to the above technical solution can quickly and conveniently locate and clamp the support sleeve shown in Figure 5, and since one side of the support sleeve is a plane and the other side is a cylindrical surface, it is difficult to accurately locate the flat vise Fixed; when the fixture is in use, firstly, the two positioning keys fixed on the bottom of the fixture body and matched with the T-shaped groove are used to accurately position the fixture body, and then the fixture is fixed on the workbench with bolts, nuts and washers. The V-shaped block is positioned on the clamp body with two pins and then fixed with screws. The cover plate is positioned on the clamp body with two pins and then fixed with screws. The upper and lower holes of the vertical support shaft are equipped with drills. When installing the fulcrum, put the gasket first, then put the sleeve, put the fulcrum through the sleeve and put it on the gasket, then put the elastic retaining ring, and then install the cover plate.

沉孔、

孔、

沉孔、2-M6-6H螺孔；然后将回转式工作台旋转90度，加工

孔。As shown in Figure 6, when clamping the support sleeve, first put the support sleeve into the fixture, the cylindrical surface on it is positioned in the V-shaped block, the plane of the support sleeve is in contact with the clamping plate, and the bottom surface is positioned on the clamp body. Two positioning plates, such that the support sleeve limits one degree of freedom of movement and two degrees of freedom of rotation through the contact of the bottom surface with the two positioning plates, and the contact of the cylindrical surface with the V-shaped block limits two degrees of freedom of movement. Then use the screw screwed into the clamping body to support the clamping plate to rotate the clamping plate around the vertical fulcrum, thereby clamping the workpiece, and also restricting the rotational freedom of the workpiece in the Y direction. In this way, the clamping support sleeve can be precisely positioned and the required multi-directional cutting process can be performed on it. processing first hole,

Counterbore,

hole,

Counterbore, 2-M6-6H screw hole; then rotate the rotary table 90 degrees, process

hole.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and what described in the above-mentioned examples and descriptions only illustrates the principle of the present invention, and the present invention also has various aspects without departing from the spirit and scope of the present invention. Variations and improvements all fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (3)

1. Fixtures for numerical control machining, which mainly include a clamp body, several positioning elements and clamping devices, characterized in that the clamp body is positioned and clamped on the T-shaped groove of the rotary workbench, and the positioning key is fixed on the clamp The specific bottom is matched with the T-shaped groove; a cover plate is installed on the upper part of the clamp body, and a V-shaped block is positioned and clamped on the inner surface of the left end of the clamp body; two positioning plates are installed on the rear side of the clamp body; A vertical fulcrum and a clamping plate that can rotate around the fulcrum are installed on the edge, and the rotation of the clamping plate is controlled by the clamping device on the clamping body. 2. The fixture for numerical control machining according to claim 1, characterized in that, the upper part of the vertical support shaft has a groove for placing a circlip on the inner side close to the clamp body, and a cushion is placed on the lower part of the vertical support shaft to clamp For the sleeve of the plate, place a gasket at the bottom of the vertical shaft to prevent wear and tear on the workbench. 3 . The fixture for numerical control machining according to claim 1 , wherein the clamping device is a screw that is screwed into the fixture body and can withstand the clamping plate. 4 .

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