Hot-extrusion production line of prestressed anchorage device clamping piece

Abstract

The invention provides a hot-extrusion production line of a prestressed anchorage device clamping piece, and relates to the technical field of extrusion molding of metal materials. The problems such as complex working procedures, great investment and high cost in the existing machining method such as cold extrusion, warm extrusion, hot extrusion, hot forging and the like can be mainly solved. The production line consists of three working procedures such as upsetting-extruding blanking, combined extrusion and punching reshaping: (1) carrying out a upsetting-extruding blanking working procedure, namely putting a heated bar into an upsetting-extruding die to obtain a frustum with a centering hole; (2) after blanking, collecting a blank by a mechanical blank collecting hand, and transporting the blank into a combined extrusion die by virtue of a transporting chain to carry out the combined extrusion working procedure, so that a semi-finished product of which the upper part and the lower part are provided with blind holes can be obtained by means of combined extrusion; and (3) after the blank is collected by the mechanical hand, transporting the blank into a floating and positioning punching reshaping die by the transporting chain to carry out punching reshaping, so that the punching reshaping working procedure is completed, a semi-finished product of an anchorage device clamping piece is obtained; and collecting a workpiece by the mechanical hand, and transporting the workpiece into a blank storing box. The production line is fewer in working procedures, high in efficiency, less in investment, long in the service life of the die, quick in production speed, and good in the concentricity of the blank.

Description

technical field [0001] The invention belongs to the technical field of extrusion molding of metal materials, in particular to a hot extrusion production line for prestressed anchor clips. Background technique [0002] The prestressed anchor clip is a key part of the prestressed anchorage, which requires high mechanical properties. The static load anchoring force reaches 27 tons, and the fatigue test is 2 million times without damage. It is a key component on the viaduct. [0003] In recent years, due to the increased investment in national infrastructure construction, the demand for prestressed anchorage has grown strongly. The blanks of the clips are cut by traditional round steel sawing machines, and multiple processes such as drilling, drawing holes, flat end faces, and turning cones are low in efficiency and far away. It is far from meeting the market demand; there are currently processing methods such as cold extrusion, warm extrusion, hot extrusion, and hot forging in ...

AI Technical Summary

Problems solved by technology

[0003] In recent years, due to the increased investment in national infrastructure construction, the demand for prestressed anchorage has grown strongly. The blanks of the clips are cut by traditional round steel sawing machines, and multiple processes such as drilling, drawing holes, flat end faces, and turning cones are low in efficiency and far away. It is far from meeting the market demand; there are currently processing methods such as cold extrusion, warm extrusion, hot extrusion, and hot forging in China; using cold extrusion to form tapered deep-hole parts for anchor clips requires relatively large equipment investment: need Spheroidizing furnace, wire drawing machine, phosphating treatment equipment, multi-station cold heading machine and other equipment, the entire assembly line requires an investment of tens of millions of yuan; the process is complex: spheroidizing annealing is required before cold extrusion, phosphating and saponification treatment, wire drawing, and shearing , flat end face, upsetting, extrusion and more than a dozen processes

The energy consumption of heat treatment before machining is obviously greater than that of hot extrusion, and the overall cost is relatively high; due to the thick oxide skin and the large amount of blank remaining in hot forging, although it has advantages over processing with round steel, the cost is still relatively high; , hot extrusion, such as the hot extrusion manufacturing method of the prestressed anchor clip mentioned in the patent 200510122879.8, upsetting only makes a cone, and then extrudes the hole. After the extrusion is completed, it directly enters the incubator. Hole, punching and then shaping, the whole manufacturing process has many procedures, extrusion billet and punching shaping are two processing methods of cold and hot, in different workplaces, the whole process is not easy to achieve assembly line operation, the workpiece is placed upside down when punching , feeding is slow in centering, low in efficiency, and although the productivity has been greatly improved compared with the blank car processing, the efficiency is still low; Considering that the end face of blank blank is flat, and if it is not flat, flat end face process is required, otherwise the blank will not be placed correctly and stably during extrusion; the verticality between the end face of blank and the punch is required to be high during extrusion, otherwise the punch is easy to be biased; The extrusion punch does not have a good cooling device. During the rapid extrusion process, the punch is made of ordinary hot forging materials, which has a very short life, frequent mold replacement, low efficiency, and relatively high cost.

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