Manufacturing method of internal jacket

Abstract

The invention discloses a manufacturing method of an internal jacket. The method comprises the following steps: the wire rod blanks are taken as the raw materials, firstly, the spheroidizing annealing is performed to the wire rod blanks of the internal jacket, the phosphating and the fine-drawing and sizing are performed to the blanks after spheroidizing annealing, and then the multi-station cold heading automatic one-time molding and the secondary fine finishing working procedures are carried out, i.e., groove broaching, tapping, piece cutting and finally, packaging and shipment. The invention adopts the wire rod materials to replace straight rods and fracturing materials, can meet the requirement of multi-station cold heading continuous production, reduces the loss of remnants, reduces the large-area of lathe remainder of the exterior conical surface, the inner hole and the end surface after adopting the multi-station cold heading one-time molding and further reduces the loss of the raw material by 30 percent, therefore, the cost is reduced; due to the adoption of the multi-station cold heading continuous molding production, the production speed can reach 60 PCS / minute, the daily output is up to 21,000 PCS in average, the production efficiency is promoted by 7-8 times than before, and the cost of investment of manpower and material resources is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of multi-station cold heading, in particular to the field of a multi-station cold heading one-time forming manufacturing method of an inner jacket. Background technique [0002] Nowadays, with the continuous progress of the industrial economy at home and abroad, the rapid development of the transportation industry, the construction of various super-span large bridges such as expressways, viaducts and sea-crossing bridges is advancing by leaps and bounds, extending in all directions. Due to the limitations of traditional metal processing and manufacturing methods and the insufficiency of multi-station cold heading technology, the inner jackets widely used on large bridge cable connectors are unstable in strength such as tensile force, etc. There are defects such as complicated processing, high energy consumption, low production efficiency and high cost. [0003] Single-station cold heading or hot heading pro...

AI Technical Summary

Problems solved by technology

[0004] Single-station cold heading is used, and the crystal structure of the product after production is not tightly arranged, which may easily cause undesirable phenomena such as cracking or cracking of the product due to insufficient strength such as tensile strength, and may easily lead to slipping or cracking of the steel cable and the inner jacket. Disadvantages of disconnection

[0005] The production of straight bar or broken material cannot meet the requirements of continuous production, and more waste such as material head and material tail will be generated, and subsequent lathe processing with multiple processes and large areas will be required, resulting in material waste and making Increased material cost

[0006] After subsequent lathe processing, due to the influence of equipment, cutting tools and human factors, it is easy to produce deviations and instability in size and roughness, and finally the requirements for finished products cannot meet the specified design and use requirements

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