CN1054918A

CN1054918A - Three dimensional bending machine for automobile door and window frames

Info

Publication number: CN1054918A
Application number: CN 91102231
Authority: CN
Inventors: 王海龙; 蔡敬斌
Original assignee: Scientific And Technical Development Corp Qinhuangdao Economic And Technical De
Current assignee: Scientific And Technical Development Corp Qinhuangdao Economic And Technical De
Priority date: 1991-04-12
Filing date: 1991-04-12
Publication date: 1991-10-02

Abstract

The three dimensional bending machine that the present invention uses for the brake forming of a kind of steam supply car door frame, this machine is made up of frame, rotary table, rotoflector head and stretch bending device etc.The rotoflector head is close on the die workpiece by the speed walking of appointment in the time of the rotary table swing, after the workpiece bending puts in place, by stretch bending device bending forming, thereby guarantees high dimension precision.In order to guarantee cross dimensions, adopt plastics and the low gold that merges to be the filling core.

Description

Three dimensional bending machine for automobile door and window frames

The invention belongs to the bending machine that shape is pressed into spatial form

The present invention is relevant with the bending forming of automobile door and window frames.The car sash of several models of China's introduction at present is the spatial form curve, and brake forming is difficulty relatively.With Audi 100 is example, former West Germany Ymos company adopts bending apparatus as shown in Figure 2 to be shaped, the prior art is to adopt four cams (6) (7) to be guiding, section bar is pressed into progressively the laggard line bend of die (8) is shaped, and the shape of section bar guarantees by four cams and a pair of punch-die.Because resilience etc. influence factors of accuracy and is difficult to control during bending forming, so can not provide the size of cam type surface and die, must constantly adjust when practical set and revise.This equipment must be adjusted four cams and a pair of punch-die simultaneously when adjusting, be difficult to accurately adjust to the right place, just is used for actual production so this equipment has been adjusted nearly 2 years.

This bending machine is invented at Audi 100 car door and windows production domesticization requirement.Because car door glass will lifting on window frame, so the curve of sash must be on the garden cylinder of R at radius.The present invention utilizes these characteristics to manufacture as shown in Figure 1 bending machine.This bending machine comprises vertical closed frame (5), rotoflector head (1), rotary table (4) stretch bending device (3) and die parts such as (2).Its principle is: it is the radius rotation with R that rotary table drives die, and in the workbench rotation, the rotoflector head is pushed down workpiece and level and vertical mobile as requested tightly, and workpiece is pressed into die, is shaped as desired shape.The radius of turn of workbench promptly is the curvature of the direction of shaping that requires, and the curvature of other direction is adjacent to die by crooked head and is shaped, and after bending forming puts in place, by drawing cylinder workpiece is strained, and its resilience is reduced, the precision raising.

The present invention compares with the prior art of Germany, has characteristics simple in structure, easy to adjust, that forming accuracy is higher, not only can satisfy the production domesticization requirement of car fully, can also be generalized in other industry and go.

Description of drawings:

Fig. 1: expression three dimensional bending machine for automobile door and window frames longitdinal cross-section diagram.

Fig. 2: the Audi 100 doorframe press bending apparatus stereograms of representing German Ymos company.

Claims

1, three dimensional bending machine for automobile door and window frames.In order to shape is once curved the three dimensions shape through this machine, vehicle window is made in weldering then.This machine is equipped with a rotary table in vertical frame, a rotoflector head, with a pair of stretch bending device, when rotary table drives die and workpiece rotation, the rotoflector head tightly is pressed in workpiece on the die by computer control or mechanical profiling, after the workpiece bending forming puts in place, add pulling force by the stretch bending device at two ends and make the workpiece stretch wrap forming.The present invention is characterised in that rotary table drives die under the hydraulic cylinder effect and workpiece is the radius rotation with R, thereby guarantee the curvature of a direction, the resilience of curvature is controlled automatically by the vertical displacement hydraulic cylinder on the rotoflector head in addition, and the curvature on another direction is realized by computer control or mechanical profiling by the rotoflector head.

2,, it is characterized in that in order to guarantee curved shape and dimensional accuracy progressively crooked back adopts the method for stretch bending to reduce resilience according to the described three dimensional bending machine for automobile door and window frames of claim 1.

3,, it is characterized in that in order to guarantee the crimped section precision, the inner nonmetal cores such as nylon, polytetrafluoroethylene (PTFE), polyvinyl chloride that adopt of section bar, and the metallic core that adopts low melting point alloy according to the described three dimensional bending machine for automobile door and window frames of claim 1.

4, according to the described three dimensional bending machine for automobile door and window frames of claim 1, it is characterized in that utilizing vehicle window frame curve these characteristics on the cylinder of garden, be designed to rotating workbench, make adjustment work easy widely.