A parallel fixture specially used for machining plane of rectangular workpiece

Abstract

This utility model relates to the field of machining, specifically a parallel fixture for machining the flat surface of rectangular workpieces. It includes a fixture body with two opposing movable clamping plates. The outer sides of the movable clamping plates are fixedly connected to the fixture body by bolts. The opposing end surfaces of the two movable clamping plates have beveled surfaces. This fixture, when used with ordinary flat-jaw vises, compensates for the error caused by the upward tilting of the jaws when clamping a workpiece. Utilizing the downward clamping force of the fixture, one side of the workpiece is tightly pressed against the flat surface of the fixture body, and the lower surface of the fixture body naturally aligns with the guide rail surface of the flat-jaw vises, thus ensuring the parallelism of the upper and lower surfaces of the workpiece. The movable clamping plates are secured by four adjustable connecting bolts, ensuring safety and a stable clamping force when clamping the workpiece.

Description

Technical Field

[0001] The utility model relates to the field of mechanical processing, in particular to a parallel clamp specially used for processing a rectangular workpiece plane, which is suitable for processing rectangular parts with parallelism requirements. Background Art

[0002] In the absence of magnetic chucks and precision flat-nose pliers, only ordinary flat-nose pliers can be used when processing rectangular workpieces with parallelism requirements. Many smaller workpieces cannot be clamped using magnetic chucks. Here, the main purpose is to enable ordinary milling machines to clamp workpieces quickly and accurately when processing rectangular workpieces with parallelism requirements, so that the plane processed each time is parallel to the plane processed last time. Utility Model Content

[0003] The utility model aims to provide a parallel clamp which is special for processing plane of rectangular workpiece and has reasonable structure and reliable clamping.

[0004] The technical solution of the utility model is: a parallel clamp dedicated to the processing plane of a rectangular workpiece, characterized in that it includes a clamp body, two opposite movable clamps are arranged on the clamp body, the outer sides of the movable clamps are fixedly connected to the clamp body by bolts, and the opposite end surfaces of the two movable clamps have inclined surfaces.

[0005] The upper end of the bolt passes through the surface of the movable clamping plate and is fixed by a nut. The bolt hole on the movable clamping plate is a long strip hole, and the lower end of the bolt is connected to the horizontal axis pin on the side of the clamp body 1.

[0006] A parallel clamp body, two movable clamps, four sets of movable clamp connecting bolts and four sets of connecting bolt fixing pins.

[0007] The advantages of the utility model are: the clamp is used in conjunction with ordinary flat-nose pliers to offset the error caused by the upward tilt of the jaws of ordinary flat-nose pliers when clamping a workpiece, and the downward clamping force of the clamp is used to tightly fit one side of the workpiece on the plane of the clamp body, and the lower plane of the clamp body will naturally be close to the plane of the flat-nose pliers guide rail to ensure that the upper and lower surfaces of the workpiece are parallel. Since the movable clamp is limited by four adjustable connecting bolts, the safety of clamping the workpiece is guaranteed, and the clamping force is stable.

[0008] The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a simplified structural diagram of the utility model.

[0010] Figure 2 yes Figure 1 A direction.

[0011] Figure 3 It is a simplified structural diagram of the utility model in the state of clamping a workpiece.

[0012] Figure 4 The utility model is a schematic top view of the structure of a workpiece clamped on a flat-nose pliers. DETAILED DESCRIPTION

[0013] See also Figure 1 -4. The names of the parts are as follows: fixture body 1, movable splint 2, nut 3, bolt 4, inclined surface 5, shaft pin 6 connection, long strip hole 7, workpiece 8, flat-nose pliers 9, flat-nose pliers jaws 10.

[0014] See also Figure 1 , 2 A parallel clamp specially used for processing planes of rectangular workpieces, including a clamp body 1, on which there are two opposite movable clamps 2, the outer sides of the movable clamps 2 are fixedly and movably connected to the clamp body 1 by bolts 4 (four), the upper ends of the bolts 4 pass through the surface of the movable clamps 2, and are fixed by nuts 3, and the movable connection allows the spacing between the two clamps to be adjusted at will within the adjustable range. The bolt holes on the movable clamps 2 are long strip holes 7, which are used to adjust the working range between the two movable clamps 2 to accommodate rectangular workpieces 8 of different sizes. The lower end of the bolt 4 is connected to the horizontal axis pin 6 on the side of the clamp body 1, and the opposite end surfaces of the two movable clamps 2 are provided with inclined surfaces 5, and the inclined surfaces 5 are mainly used to increase the gap between the tool and the clamps when processing individual thin workpieces to prevent collision between the tool and the clamps.

[0015] See also Figure 3 , 4 First, place the clamp into an ordinary flat-nose pliers 9, and adjust the four adjustable connecting bolts 4 and the spacing and angle of the two movable clamps 2 according to the size of the workpiece 8 to ensure that the two movable clamps 2 act downward when the flat-nose pliers 9 clamp the movable clamp 2. Then place the rectangular workpiece 8 between the two movable clamps 2, clamp the flat-nose pliers 9, and clamp the movable clamp 2 of the clamp through the flat-nose pliers jaws 10 to clamp the rectangular workpiece 8 at the same time. Since the movable clamp 2 acts downward, and since the plane at the junction of the flat-nose pliers jaws 10 and the movable clamp 2 has a certain angle with the center line of the clamp, which is less than the vertical range of 90 degrees, the movable clamp 2 naturally acts downward when clamping the workpiece 8, so the workpiece 8 will not warp up. Therefore, when milling the workpiece plane, the parallelism of the upper and lower sides of the rectangular workpiece 8 can be well guaranteed.

[0016] It is a special fixture used with ordinary flat-nose pliers 9 when processing the plane of a rectangular workpiece 8 with parallelism requirements on an ordinary milling machine. It is suitable for various single parts and small batch products with parallelism requirements within the clamping range of various fixtures. After actual production inspection, this fixture is suitable for parallel surface processing of various rectangular workpieces. Since the clamping part of the fixture is a pair of adjustable clamps with downward clamping force, it offsets the error of the jaws of ordinary flat-nose pliers when clamping the workpiece, thereby ensuring the parallelism of the workpiece. In actual measurement, the maximum parallelism can be maintained at about 0.02 mm, which can fully meet a large part of the product technical requirements.

[0017] The above description is only a specific implementation of the present utility model, and various examples do not constitute a limitation on the essential content of the present utility model.

Claims

1. A parallel clamp specially used for processing rectangular workpiece planes, characterized in that The clamp comprises a clamp body (1), the clamp body (1) is provided with two opposite movable clamping plates (2), the outer sides of the movable clamping plates (2) are fixedly connected to the clamp body (1) via bolts (4), and the opposite end surfaces of the two movable clamping plates (2) are provided with inclined surfaces (5).

2. A parallel clamp for rectangular workpiece machining plane according to claim 1, characterized in that The upper end of the bolt (4) passes through the surface of the movable clamp (2) and is fixed by a nut (3). The bolt hole on the movable clamp (2) is a long strip hole (7). The lower end of the bolt (4) is connected to the horizontal axis pin (6) on the side of the clamp body (1).

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