Stitch welding mold for tubular workpiece molding

Abstract

A stitch welding mold for tubular workpiece molding comprises a tunnel mold base (1), a tunnel mold core (2) and a tunnel sliding guide mold (3), wherein the tunnel mold core (2) and the tunnel sliding guide mold (3) are respectively fixed in an inner cavity of the tunnel mold base (1). A plurality of grooves (21) are formed in an inner wall surface of the tunnel mold core (2), a panel (5) which is convenient to detach is arranged in each groove (21), the thickness of the panels (5) is larger than the depth of the grooves (21), and a part, protruding from the inner wall surface of the tunnel mold core (2), of each panel (5) defines an arc-shaped inner wall surface which just encircles a tubular workpiece with a specified diameter. The tunnel mold core of the stitch welding mold for the tubular workpiece molding is adaptive to panels with different specifications, and thereby one mold is capable of welding and machining tubular workpieces with different diameters, and after a certain panel is worn, only the worn panel needs to be replaced, the tunnel mold core and other unworn panels do not need to be replaced. In addition, after being recut, the worn panel can also be applicable to a tubular workpiece with a bigger diameter, and the manufacturing cost and the using and maintenance cost of the mold are saved greatly.

Description

technical field [0001] The invention relates to a welding machine, in particular to a welding mold used for seam-welding and forming metal cylinder workpieces. Background technique [0002] At present, a metal cylinder of a certain length is the most commonly used component base in various manufacturing and processing industries, and has a wide range of applications in food packaging, industrial manufacturing, and especially in the compressor industry. In the prior art, the integral mold core made of special alloy material is usually used in the welding mold for forming the metal cylinder. This integral mold core has the following disadvantages: 1. The integral mold core is expensive to manufacture and difficult to process. Maintenance costs are huge. For example, make a core of "shaping seam welding mold" for a cylindrical workpiece with a diameter of Ф125mm. The material must be customized to about Ф180mm*120mm (length). The material is copper as an example: the weight ...

AI Technical Summary

Problems solved by technology

In the prior art, the integral mold core made of special alloy material is usually used in the welding mold for forming the metal cylinder. This integral mold core has the following disadvantages: 1. The integral mold core is expensive to manufacture and difficult to process. Huge maintenance costs

The utilization rate of materials is less than 50%, and there is a lot of waste

2. The long-term contact and friction between the workpiece and the mold core will definitely cause permanent wear to the mold core, making the size of the mold core larger or irregular, and it is impossible to process the workpiece

However, the adjustable shrinkage of the mold to the mold core can only be limited to the overall change and the adjustment amount is very small.

As a result, once the mold core is greatly worn, it can no longer be used and must be replaced as a whole

Therefore, the overall service life of the mold is relatively low

3. Due to the requirements of the characteristics of the overall mold core, the mold core must ensure a certain wall thickness, resulting in different workpieces requiring corresponding size mold cores for corresponding processing, and corresponding mold bases for installation, resulting in maintenance of mold manufacturing cost is high

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