CN203140563U

CN203140563U - Soft pipe-bending die in ball-and-socket joint structure

Info

Publication number: CN203140563U
Application number: CN 201320038126
Authority: CN
Inventors: 袁晓波; 陈博; 曹巍岩; 石玫; 李梅
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2013-01-24
Filing date: 2013-01-24
Publication date: 2013-08-21
Anticipated expiration: 2023-01-24

Abstract

The utility model relates to a soft pipe-bending die in a ball-and-socket joint structure. The soft pipe-bending die is characterized in that one end of a core head body is connected with a pull rod of a numerically-controlled tube bending machine, the front end of an inner ball joint is inserted into the other end of the core head body to be fixedly connected with the core head body, a spherical socket groove is formed in the rear end of the inner ball joint, each inner-and-outer ball joint is provided with a spherical protrusion at the front end and a spherical socket groove in the rear end, outer ball joints are annular and sleeved on outer layers of the inner-and-outer ball joints, an outer ball is provided with a spherical protrusion at the front end and a solid rear end, heads and tails of the two inner-and-outer ball joints are interlocked, the spherical protrusion at the front end of the first inner-and-outer ball joint at the front end is embedded in and movably connected with the spherical socket groove in the rear end of the inner ball joint, and the outer ball is embedded in and movably connected with the rear end of the last inner-and-outer ball joint. The soft pipe-bending die is a movable pipe-bending die in the ball-and-socket joint structure, and the trial-production of thin-wall stainless steel pipes can be achieved by just using the ordinary tube bending machine by the aid of the soft movable structure of the pipe-bending die, so that a lot of device costs are saved, and the trial-production cycle is shortened.

Description

The soft bend pipe mould of ball-and-socket joint structure

Technical field

The utility model relates to a kind of soft bend pipe mould of ball-and-socket joint structure ,The technical field that belongs to automobile trial-production specially refers to the automotive air intake pipe trial-production of Europe IV discharge standard.

Background technology

Along with the quickening of auto manufacturing's step in line with international standards, the commercial truck discharge standard is progressively close to Europe IV standard, so just meets at present the trend that motor vehicle emission in the world develops to the energy-saving and environmental protection direction.Because the anti-urea corrosion of stainless steel material, therefore, vapour technique center project verification exploitation stainless steel silencer air inlet pipe is used for commercial truck.

This requires crooked is the stainless steel tube of Φ 114X2mm, belongs to light-wall pipe, and the quality of its bending quality will directly have influence on the reasonability, security, reliability etc. of product structure.

With respect to common steel tube, the working hardening of stainless steel material in drawing process is obvious, cause tensile strength also high, and the stainless steel strain hardening begin the surrender after begin immediately, resistance of deformation can constantly increase, consumption to power and equipment is also higher relatively, so the stainless steel elbow difficulty goes out many greatly than common steel tube bend pipe.General crooked thin-wall stainless steel need use the medium frequency bending of pipe machine to add thermal flexure, for automobile trial-production, medium frequency bending of pipe machine equipment expense is higher, popularity rate is lower, and the rigging up and debugging cycle is longer, can not satisfy the requirement that low cost, cycle are short, precision is high of trial-production.

Summary of the invention

The purpose of this utility model provides a kind of soft bend pipe mould of ball-and-socket joint structure, it is a kind of movable bend pipe mould of ball-and-socket joint structure, soft movable structure by bend pipe mould reaches the requirement of only adopting the general elbow machine just can realize thin-wall stainless steel trial-production, save the large number quipments expense, shortened trial-produce period.

The technical solution of the utility model is achieved in that the soft bend pipe mould of ball-and-socket joint structure, by the core print body, interior ball-joint, inside and outside ball-joint, ectosphere and outer ball-joint are formed, it is characterized in that: core print body one end links to each other with the pull bar of CNC tube bending machine, the front end of interior ball-joint inserts the core print body other end fixedlys connected with the core print body, interior ball-joint rear end has spherical nest groove, inside and outside ball-joint front end is hemisphere jut, the rear end is spherical nest groove, outer ball-joint is that annular casing is at inside and outside ball-joint skin, the ectosphere front end is that the hemisphere jut rear end is solid, 2 inside and outside ball-joint head and the tail are all linked with one another, flexibly connect in the spherical nest groove of ball-joint rear end in the hemisphere jut of first inside and outside ball-joint front end of front end embeds, ectosphere embeds last inside and outside ball-joint rear end and flexibly connects.

The gap of described core print body, ectosphere, outer ball-joint external diameter and stainless steel tube internal diameter is between 0.3～0.4mm, and case hardness should reach 55HRC, and surface roughness is 1.6 microns.

Good effect of the present utility model is that it is a kind of movable bend pipe mould of ball-and-socket joint structure, soft movable structure by bend pipe mould reaches the requirement of only adopting the general elbow machine just can realize thin-wall stainless steel trial-production, and inside and outside ball-joint can adapt to multi-direction rotation and easy to process to outer ball portion, save the large number quipments expense, shortened trial-produce period.

Description of drawings

Fig. 1 is structure chart of the present utility model.

Fig. 2 inserts the tube bending position dimension figure of place for the utility model.

Fig. 3 is that the inside and outside ball-joint of the utility model cooperates schematic diagram with outer ball-joint.

The specific embodiment

Be further described below in conjunction with accompanying drawing and the utility model of embodiment: as Fig. 1,2, shown in 3, the soft bend pipe mould of ball-and-socket joint structure, by core print body 1, interior ball-joint 2, inside and outside ball-joint 3, ectosphere 4 and outer ball-joint 5 are formed, it is characterized in that: core print body 1 one ends link to each other with the pull bar of CNC tube bending machine, the front end of interior ball-joint 2 inserts core print body 1 other end fixedlys connected with core print body 1, interior ball-joint 2 rear ends have spherical nest groove, inside and outside ball-joint 3 front ends are hemisphere jut, the rear end is spherical nest groove, outer ball-joint 5 is that annular casing is at inside and outside ball-joint 3 skins, ectosphere 4 front ends are that the hemisphere jut rear end is solid, 2 inside and outside ball-joint 3 head and the tail are all linked with one another, flexibly connect in the spherical nest groove of ball-joint 2 rear ends in the hemisphere jut of first inside and outside ball-joint 3 front ends of front end embeds, ectosphere 4 embeds last inside and outside ball-joint 3 rear end and flexibly connects.

The gap of described core print body 1, ectosphere 4 outer ball-joint 5 external diameters and stainless steel tube internal diameter is between 0.3～0.4mm, and case hardness should reach 55HRC, and surface roughness is 1.6 microns.

Motion process of the present utility model is such, will be enclosed within on the ball-and-socket joint bend pipe mould by crooked stainless steel tube 6 earlier, clamp 8 clamps stainless steel tube, the default bending parameters of computer input, in the BENDING PROCESS, clamp 8 drives steel pipe 6 along 10 rotations of bend pipe mould, and boosting fast 7 plays the effect of auxiliary propulsion, and wrinkle resistant 9 is played the effect that prevents that crooked position is wrinkling.After reaching angle of bend, earlier ball-and-socket joint bending die plug is withdrawn from, opened clamp 8 again, take out curved good stainless steel tube 6.

Embodiment

As shown in table 1, this time stainless steel tube is Φ 114X2mm, and crooked filleted corner R is 150mm, R/D ≈ 1.3, S/D ≈ 1/60.

Annotate: plug (being the centreless bend pipe) can not be used in 1.N-expression; 2.H-expression can be used rigid plug bend pipe; 3.F-expression needs to use soft plug bend pipe, the ball-joint number of the numeral of back for recommending

During work, singly there is theoretical action can't guarantee to bend out high-quality stainless steel tube, also needs following operational means:

For guaranteeing that clamping force is enough, skidding does not appear, and in BENDING PROCESS, should adopt operations multitask to reduce the resistance to deformation power that strain hardening produces in the stainless steel tube BENDING PROCESS;

Selected the higher stainless steel moulding oil of viscosity for use according to actual conditions, if the situation of lack of lubrication also needs to add an amount of stainless steel moulding extreme pressure agent;

Test out with the springback capacity of batch stainless steel tube and also adjusted correction compensate for bend angle;

After shape and size size of the present utility model was determined, the position dimension e that its insertion pipe begins the knee also was a very important factor that influences bending quality.If overhang excessive (the e value is excessive) may the squeeze crack tube outer wall; If overhang too small (the e value is too small) does not have the flat effect of preapring for an unfavorable turn of events accordingly again, the circular arc inboard also may be wrinkling.Through experiment, determine that the e value is about and reach best bending effect when 1/4 of stainless steel tube internal diameter is 27mm.

Shape of cross section by its circular arc place of pipe fitting that above operational means bent out does not have ellipse and wrinkle substantially, has reached good effect.

Claims

1. the soft bend pipe mould of ball-and-socket joint structure, by the core print body, interior ball-joint, inside and outside ball-joint, ectosphere and outer ball-joint are formed, it is characterized in that: core print body one end links to each other with the pull bar of CNC tube bending machine, the front end of interior ball-joint inserts the core print body other end fixedlys connected with the core print body, interior ball-joint rear end has spherical nest groove, inside and outside ball-joint front end is hemisphere jut, the rear end is spherical nest groove, outer ball-joint is that annular casing is at inside and outside ball-joint skin, the ectosphere front end is that the hemisphere jut rear end is solid, 2 inside and outside ball-joint head and the tail are all linked with one another, flexibly connect in the spherical nest groove of ball-joint rear end in the hemisphere jut of first inside and outside ball-joint front end of front end embeds, ectosphere embeds last inside and outside ball-joint rear end and flexibly connects.

2. the soft bend pipe mould of ball-and-socket joint structure according to claim 1, it is characterized in that the gap of described core print body, ectosphere, outer ball-joint external diameter and stainless steel tube internal diameter is between 0.3～0.4mm, case hardness should reach 55HRC, and surface roughness is 1.6 microns.