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Flexible bending tube die of ball-and-socket joint structure

A technology of ball and socket joints and ball joints, which is applied in the field of trial production of automobile intake pipes, can solve the problems of short cycle, long cycle of equipment installation and debugging, and high precision, and achieve the effects of saving trial production costs, shortening trial production cycle, and convenient processing

Active Publication Date: 2014-12-10
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the bending of thin-walled stainless steel pipes requires the use of intermediate frequency pipe benders for heating and bending. For automobile trial production, the equipment cost of intermediate frequency pipe benders is relatively high, the popularity rate is low, and the installation and commissioning period of equipment is long, which cannot meet the low cost of trial production. , short cycle and high precision requirements

Method used

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  • Flexible bending tube die of ball-and-socket joint structure
  • Flexible bending tube die of ball-and-socket joint structure
  • Flexible bending tube die of ball-and-socket joint structure

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Experimental program
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Effect test

Embodiment

[0020] As shown in Table 1, this time the stainless steel tube is Φ114X2mm, the curved inner fillet R is 150mm, R / D≈1.3, S / D≈1 / 60, and the number of ball joints selected is 3.

[0021]

[0022] Note: 1.N—means that the mandrel can not be used (that is, the elbow without core); 2.H—means that the hard mandrel elbow can be used; 3.F—means that the soft mandrel elbow needs to be used, the number behind Is the recommended number of pitches

[0023] The specific process steps of stainless steel elbow are as follows:

[0024] 1. Design and manufacture the soft elbow mould with ball joint structure according to the above requirements, with 3 ball joints;

[0025] 2. According to the ratio of 10:3, mix the stainless steel forming oil with the special extreme pressure agent for stainless steel, and then apply it evenly on the surface of the ball and socket core rod and the inner surface of the stainless steel tube;

[0026] 3. Put the stainless steel tube 6 to be bent on the ball and socket cor...

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Abstract

The invention relates to a flexible bending tube die of a ball-and-socket joint structure which is characterized in that one end a core head body is connected with a pull rod of a numerical control tube bending machine, the front end of an inner ball joint is inserted into the other end of the core head body and fixed connected with the same, the rear end of the inner ball joint is provided with a spherical socket, the front end of the inner outer ball joint is provided with a spherical protrusion, the rear end of the inner outer ball joint is provided with a spherical socket, an annular outer ball joint is sleeved on the outer layer of the inner outer ball joint, the front end of an outer ball is provided with a spherical protrusion, the rear end of the outer ball is solid, two inner outer ball joints are connected end to end, the spherical protrusion at the front end of the first inner outer ball joint at the front end is embedded into and movably connected with the spherical socket at the rear end of the inner ball joint, the outer ball is embedded into and movably connected with the rear end of the last inner outer ball joint. By the movable bending tube of the ball-and-socket joint structure and flexible movable structure, the requirements for thin-walled stainless steel tube trial-manufacture can be met by common tube bending machines, a large amount of equipment cost is saved, and trial manufacture cycle is shortened.

Description

technical field [0001] The invention relates to a soft pipe bending mold with a ball-and-socket joint structure and a special pipe bending process and parameters, belonging to the technical field of automobile trial production, and in particular to the trial production of automobile intake pipes with Euro IV emission standards. Background technique [0002] With the acceleration of the pace of the automobile manufacturing industry being in line with international standards, the emission standards for commercial trucks are gradually approaching the Euro IV standard, which is in line with the current international development trend of automobile emissions in the direction of energy saving and environmental protection. Because stainless steel is resistant to urea corrosion, FAW Technology Center initiated a project to develop stainless steel muffler intake pipes for commercial trucks. [0003] This time, the stainless steel pipe of Φ114X2mm is required to be bent, which is a th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D37/00B21D9/07
Inventor 袁晓波陈博曹巍岩石玫李梅
Owner CHINA FIRST AUTOMOBILE
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