Large plate positioning clamp

Abstract

A large plate positioning clamp comprises a clamping base plate, end plates are installed at the two ends of the clamping base plate respectively, a pair of movable rods are arranged on the end plates in a penetrating mode, clamping plates are arranged at the inner side ends of the movable rods, inner top plates are arranged at the outer side ends of the movable rods, a pair of inner top protruding plates are arranged on the outer walls of the inner top plates, and the outer walls of the inner top protruding plates are vortex-shaped curved surfaces. Concave seats are installed on the lower walls of the two ends of the clamping base plate, rotating inner blocks are hinged to the lower ends of the concave seats, guide plates are arranged on the rotating inner blocks in a penetrating mode, moving blocks are arranged at the outer side ends of the guide plates, the inner walls of the moving blocks abut against the outer walls of the inner jacking protruding plates, and inner pressing lead screws are rotationally arranged on the rotating inner blocks; by means of the internal pressing device, the reliability of plate positioning is improved, and positioning operation can be conveniently carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to a large plate positioning fixture. Background Art

[0002] Aviation components such as oil storage parts are large in size, and when processing them, they need to be positioned to ensure the processing accuracy. When positioning, the processing plate is positioned by multiple screws inserted into the T-slots on the processing pad, a pressure plate inserted on the screws, and a nut set on the upper end of the screws. This positioning method requires the position of the processing plate to be adjusted first, and then clamped by pressing down. However, during the processing, when the processing plate is moved, the processing plate is prone to slight movement, which will affect the processing accuracy of the plate. Secondly, this positioning method is relatively cumbersome. Utility Model Content

[0003] The utility model provides a large plate positioning fixture to solve the above-mentioned deficiencies in the prior art, solve the problems of poor positioning stability and complicated positioning process, and has strong practicability.

[0004] In order to achieve the purpose of this utility model, the following technologies are proposed:

[0005] The outer end of the inner plate is provided with a cam, and the outer end of the cam is provided with a cam, and the cam is provided with a cam at the outer end of the cam, and the cam is provided with a cam at the inner end of the cam, and the cam is provided with a cam at the outer end of the cam. At the same time, in order to improve the reliability of clamping, an internal pressure screw is also arranged on the moving block to ensure the contact force between the moving block and the inner top convex plate.

[0006] Furthermore, a clamping groove is provided on the inner wall of the clamping plate, and the upper side of a pair of plates is limited by the upper wall of the clamping groove.

[0007] Furthermore, the upper wall of the clamping groove is an inclined surface, and the inner end of the inclined surface extends upwardly in an inclined manner. When clamping, the inclined surface can act on the edge of the plate, thereby positioning the two ends and the upper side of the plate.

[0008] Furthermore, a hook portion is provided at the lower end of the inner top convex plate to prevent the moving block from excessively rotating downwards and affecting the clamping operation.

[0009] Furthermore, a pair of nuts are provided at the outer ends of the movable rod, and the inner top plate is located between the nuts. The position of the clamping plate can be adjusted according to the size of the plate through the setting of the nuts, thereby expanding the scope of use.

[0010] The advantages of the above technical solution are:

[0011] The utility model improves the reliability of plate positioning and facilitates positioning operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0013] Figure 1 The three-dimensional structure of one embodiment is shown Figure 1 .

[0014] Figure 2 The three-dimensional structure of one embodiment is shown Figure 2 . DETAILED DESCRIPTION

[0015] like Figure 1~Figure 2 As shown, a large plate positioning fixture includes a clamping plate 1, end plates 10 are respectively installed at both ends of the clamping plate 1, a pair of movable rods 2 are passed through the end plates 10, the inner ends of the movable rods 2 are provided with clamping plates, the inner walls of the clamping plates are provided with clamping grooves, the upper wall of the clamping grooves is an inclined surface, and the inner ends of the inclined surfaces extend upwardly. An inner top plate 20 is provided at the outer end of the movable rod 2, and a pair of inner top convex plates 23 are provided on the outer wall of the inner top plate 20. A hook portion 24 is provided at the lower end of the inner top convex plate 23. The outer wall of the inner top convex plate 23 is a spiral curved surface, and the lower end of the spiral curved surface expands outward. Concave seats 25 are installed on the lower walls of both ends of the clamping pad 1. A rotating inner block 26 is hinged at the lower end of the concave seat 25. A guide plate 30 is passed through the rotating inner block 26. A moving block 29 is provided at the outer end of the guide plate 30. The inner wall of the moving block 29 is pressed tightly against the outer wall of the inner top convex plate 23. An internal pressing screw 27 is rotatably provided on the rotating inner block 26. A rotating end cap 28 is provided at the outer end of the internal pressing screw 27. In addition, a pair of nuts 21 are provided at the outer end of the movable rod 2, and the inner top plate 20 is located between the nuts 21.

[0016] When operating the embodiment, the operator places the plate on the clamping pad 1 and then rotates the nut 21 so that the nut 21 is away from the inner top plate 20 .

[0017] The operator then moves the clamping plates inwards to reduce the distance between the clamping plates and the clamping ends of the workpiece.

[0018] Then the operator rotates the moving block 29 downward through the internal pressure screw 27. When the moving block 29 rotates downward, its inner wall will act on the spiral surface of the inner top convex plate 23, thereby causing the clamping plate to move inward, and at the same time causing the clamping plate to act on the two ends of the processed plate. Preferably, the inclined surface of the clamping groove can act on the edges of the two ends of the processed plate, and finally complete the positioning and clamping operation of the two ends of the plate.

[0019] Then the operator rotates the inner pressure screw 27 to make the inner wall of the moving block 29 press against the outer wall of the inner top convex plate 23, and then performs the processing operation of the processing plate.

[0020] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Obviously, those skilled in the art can make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and their equivalents, the utility model is also intended to include these modifications and variations.

Claims

1. A large plate positioning fixture, characterized in that: It comprises a clamping pad (1), with end plates (10) respectively mounted on both ends of the clamping pad (1), a pair of movable rods (2) passing through the end plates (10), and clamping plates being arranged at the inner ends of the movable rods (2); An inner top plate (20) is provided at the outer end of the movable rod (2), and a pair of inner top convex plates (23) are provided on the outer wall of the inner top plate (20), and the outer wall of the inner top convex plate (23) is a spiral curved surface, and the lower end of the spiral curved surface expands outward; Concave seats (25) are installed on the lower walls of both ends of the clamping pad (1), and a rotating inner block (26) is hinged at the lower end of the concave seat (25). A guide plate (30) is passed through the rotating inner block (26), and a moving block (29) is provided at the outer end of the guide plate (30). The inner wall of the moving block (29) is tightly pressed against the outer wall of the inner top convex plate (23). An internal pressure screw (27) is rotatably provided on the rotating inner block (26), and a rotating end cap (28) is provided at the outer end of the internal pressure screw (27).

2. The large plate positioning fixture according to claim 1, characterized in that: The inner wall of the clamping plate is provided with a clamping groove.

3. The large plate positioning fixture according to claim 2, characterized in that: The upper wall of the clamping groove is an inclined surface, and the inner side end of the inclined surface extends upwardly.

4. The large plate positioning fixture according to claim 1, characterized in that: A hook portion (24) is provided at the lower end of the inner top convex plate (23).

5. The large plate positioning fixture according to claim 1, characterized in that: A pair of nuts (21) are provided at the outer ends of the movable rod (2), and the inner top plate (20) is located between the nuts (21).

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