A portable positioning seat and clamping assembly for cutting workbench

Abstract

The invention discloses a portable positioning base for cutting a worktable. The portable positioning base comprises an outer positioning block (52) and an inner positioning block (53) fixedly connected; the inner positioning block is used for embedding in a worktable positioning groove (31) to fix the whole positioning base (5); the outer positioning block is fixedly connected to the top of the inner positioning block, and is positioned out of the worktable positioning groove; and a clamping groove (521) is formed in the outer positioning block. A positioning rod is positioned through the outer positioning block; when the tail end of the positioning rod moves in a clamping groove, chips in the clamping groove can be pushed out; when a workpiece clamping position is switched, the chips in the worktable positioning groove has no need to remove; the length direction of the clamping groove in the outer positioning block is perpendicular to or forms a certain inclined angle with the side surface of a workpiece, so that the distance between the positioning rod and the workpiece is convenient to adjust, and the conditions of extrusion of the workpiece by the positioning rod and farther distance between two support points of a pressing plate, when the width of the workpiece is equal to or slightly larger than the distance between two positioning grooves of the worktable, are prevented.

Description

technical field [0001] The invention relates to the field of fixtures, in particular to a portable positioning seat and a clamping assembly used for auxiliary clamping of workpieces on a machining platform. Background technique [0002] Commonly used clamping methods for sheet metal cutting are: flat pliers clamping, special clamping clamping, and pressing plate clamping. Among them, flat jaw clamps are only suitable for clamping small-sized sheets, and special clamps are only suitable for large-scale products due to high production costs. Press plate clamping is the most commonly used clamping method. The positioning seat used in the existing workbench is built into the T-shaped groove of the workbench. During cutting, iron filings can easily cover the positioning seat, causing subsequent movement of the press plate and Iron filings need to be cleaned when the positioning rod is 4, which affects production efficiency, see figure 1 , the existing clamping plate mainly has t...

AI Technical Summary

Problems solved by technology

[0002] Commonly used clamping methods for sheet metal cutting are: flat pliers clamping, special clamping clamping, and pressing plate clamping. Among them, flat jaw clamps are only suitable for clamping small-sized sheets, and special clamps are only suitable for large-scale products due to high production costs. Press plate clamping is the most commonly used clamping method. The positioning seat used in the existing workbench is built into the T-shaped groove of the workbench. During cutting, iron filings can easily cover the positioning seat, causing subsequent movement of the press plate and Iron filings need to be cleaned when the positioning rod is 4, which affects production efficiency, see figure 1 , the existing clamping plate mainly has the following defects:

[0005] The second method: the second method used for clamping the existing pressure plate is to set the positioning rod 4 and the positioning seat 5 into a detachable structure on the basis of the first method above, and set screw holes on the positioning seat 5 51, the lower end of the positioning rod 4 is provided with an external thread that matches the screw hole 51 on the positioning seat, and the upper end of the positioning rod is provided with an external thread that is equipped with a nut (that is, the positioning rod is set in the form of a double-ended screw rod). Before processing, the workpiece 1 needs to be processed A set of positioning seats 5 are respectively placed in the T-shaped grooves 31 on both sides of the plate, and the positioning rod 4 is screwed out from the positioning seat when the position of the pressing plate 2 is replaced, and then screwed into the positioning seat on the other side; The positioning rod 4 is screwed out from the positioning seat on one side and then changed to the positioning seat on the other side to be screwed in, so that the more the number of pressing plates, the greater the workload, and at the same time the screw hole 51 on the positioning seat and the positioning wear of rod 4, reducing the service life of both

[0009] 3. In order to facilitate the replacement of the position of the pressing plate, the length and width of the existing positioning seat are designed to be short to facilitate the flexible picking and placing of the positioning seat. The contact area with the inner wall of the T-shaped groove of the workbench is small, and the T of the workbench is easy to be strained during the clamping process. Groove inner wall

Chinese patent 201410032918.4 discloses a workbench for a vertical milling machine. In this solution, several parallel inverted "T"-shaped built-in grooves are arranged on the upper surface of the workbench body, and a vertical "convex" for sliding in the built-in groove is provided. Type latch strip, on which there is a movable clamping screw, because in this scheme, the clamping screw extends into the latch strip, and the latch strip is embedded in the "T"-shaped built-in groove of the workbench, the clamping screw The diameter of the rod cannot be set too large (compared to the original clamping screw inserted directly into the T-shaped slot), which will inevitably reduce the yield strength of the screw, the screw is prone to bending deformation, and the clamping is not stable enough

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