Clamp for longitudinal notching and transverse sectioning in linear cutting of needle tubes

Abstract

A clamp for longitudinal notching and transverse sectioning in linear cutting of needle tubes comprises the needle tubes, a clamp body, strong magnets, a cutting line, a support, a cushion block, a pressing plate, a nut and a screw rod. The needle tubes are inserted into clamp positioning holes, the strong magnets suck the needle tubes through the clamp body so that the needle tubes cannot move in the positioning holes, the needle tubes are vertically distributed when cut and notched longitudinally on the cutting line by the clamp body, the needle tubes are horizontally distributed by means of 90-degree rotation of the clamp body when cut and sectioned transversely on the cutting line, the clamp body is tightly attached onto the support on a cutting machine tool during cutting, and the pressing plate is used for tightly pressing the clamp body on the support through the cushion block, the screw rod and the nut. By the aid of the clamp, machining efficiency can be improved, operation is convenient and simple, machining is stable, and the cut and sectioned needle tubes are high in qualification rate and can completely meet technical requirements.

Description

[0001] technical field [0002] The invention relates to the technical field of fixtures, in particular to a wire electric discharge cutting fixture. Background technique [0003] At present, wire cutting generally adopts the method of pressing the workpiece with a pressure plate for cutting processing, or sticking the workpiece with glue, or using a strong magnet to hold the workpiece for cutting processing, or cutting a positioning plate on the fixture in advance, and then inserting the workpiece Go in and then cut, so that the concentricity and symmetry of the cut workpiece are better. [0004] For the workpiece to be processed is an injection needle tube, use WEDM to make a notch along the needle tube longitudinally and then cut it into several small sections horizontally. The general positioning method is to cut a positioning hole and a cut-in groove on the positioning fixture according to the diameter of the needle tube to be cut in advance, and then Insert the needle...

AI Technical Summary

Problems solved by technology

[0004] For the workpiece to be processed is an injection needle tube, use WEDM to make a notch along the needle tube longitudinally and then cut it into several small sections horizontally. The general positioning method is to cut a positioning hole and a cut-in groove on the positioning fixture according to the diameter of the needle tube to be cut in advance, and then Insert the needle tube into the positioning hole for positioning. The gap between the needle tube and the positioning hole is very high. If the gap is small, the needle tube will be difficult to insert. If the gap is too large, the needle tube will slip from the positioning hole. Even if the gap is appropriate, the needle tube still depends on the outer wall of the needle tube and the positioning hole. The friction between the inner walls is supported. When the needle tube is sprayed by coolant and the cutting line moves up and down during the wire cutting process, the needle tube will easily move down along the positioning hole. Because the needle tube is very small (diameter 0.5~0.8mm) and the surface is smooth , and the middle of the needle tube is hollow, which makes it difficult to clamp the needle tube. In the past, a small amount of 502 glue was added between the needle tube and the positioning hole to fix the needle tube so that it would not move up and down in the positioning hole, but special attention should be paid to the needle tube and the positioning hole Always in a good contact state, otherwise electricity cannot be introduced into the needle tube to form an electrode. This method of clamping and fixing the needle tube needs to clean the 502 glue inside the positioning hole before the next needle tube cutting process can be performed. For mass production of this clamping The method of fixing the needle tube is very cumbersome and the vertical notch of the cut needle tube is not evenly positioned. In addition, the workload of manual assisted glue removal is relatively large, and it takes a long time to occupy the positioning fixture. The entire processing efficiency is low. Low

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