CN102601220A

CN102601220A - Machining process for bend flange channel girder fuel tank bracket

Info

Publication number: CN102601220A
Application number: CN2012100860545A
Authority: CN
Inventors: 李忠敬; 尹贻广; 张磊; 张学平
Original assignee: China National Heavy Duty Truck Group Jinan Power Co Ltd
Current assignee: Sinotruk Jinan Power Co Ltd; China National Heavy Duty Truck Group Jinan Power Co Ltd
Priority date: 2012-03-28
Filing date: 2012-03-28
Publication date: 2012-07-25
Anticipated expiration: 2032-03-28
Also published as: CN102601220B

Abstract

Disclosed is a machining process for a bend flange channel girder fuel tank bracket. The technical scheme includes that the machining process for the bend flange channel girder fuel tank bracket adopts a novel process method of sequence forming and multiple bending, a section channel and a bend are respectively formed in a pressing process, operating difficulty in multiple stretching in one-step pressing is reduced for a machining operator, complicated simultaneous forming of the metal section channel and the bend is changed into the pressing process of respectively forming the section channel and the bend, and cracking or ultra-thinness of bend positions of the bend flange channel girder fuel tank bracket in the pressing process is successfully avoided.

Description

The processing technology of bent angle flange trough girder tank support

Technical field

The present invention is a kind of processing technology of bent angle flange trough girder tank support, belongs to the machine-building stamping technology---metal plate material plastic forming technology field.

Background technology

This tank support project that to be China heavy vapour group cooperate with German Man, version is bent angle (90 °), flange flange, rectangle and trapezium channel section, abbreviation bent angle flange trough girder tank support (see figure 1).This tank support sheet material is Q420B; Thickness is 5mm (general＞4mm belongs to slab); Design ingeniously, load capacity is big, loading is stable, easy for installation firmly, but its corner moulding difficulty is difficult for compacting greatly; Though in development process, adopted multiple drawing method, ultra-thin or cracking phenomena has still appearred in the flange flange of corner.Its conventional cold stamping method for making has two kinds: 1: dull and stereotyped straight forming; 2: the dull and stereotyped bent angle of elder generation, secondary compression moulding.

Method one dull and stereotyped straight forming method (see figure 2):

(1) blanking---plate blank profile;

(2) be shaped---the moulding simultaneously of bent angle and cross section

(3) follow-up punching.

Moulding difficulty in the method corner is big; The corner begins the easy unstability of back tangential material, formation gauffer in stretching, flexural deformation, has stoped the Radial Flow of material; And in the junction of bent angle and straight flange easy of crack or ultra-thin; It improves, and difficulty is big, and precautionary measures are numerous and diverse, referring to patent 200810047161.0 " control method of anti-cracking during vehicle oil-tank bracket tension ".

Method two is dull and stereotyped bent angle earlier, secondary bent angle method of forming (see figure 3):

(1) blanking---plate blank profile;

(2) pre-bending angle---only plate blank is curved 90 ° or near the bent angle of product;

(3) being shaped---moulding bent angle blank drawn, crooked compacting is again accomplished the product cross section shape;

(4) follow-up punching.

Though the method has been carried out the pre-bending angle with plate blank, the easy unstability of tangential material, formation gauffer when molding procedure still can't solve the moulding of cross section, corner, the difficult problem of corner cracking or attenuation.

With the immediate prior art of the present invention be that publication number is: 101357383; The patent No. is: the control method of anti-cracking during 200810047161.0 vehicle oil-tank bracket tension; The dull and stereotyped straight forming method that it still adopts basically to original the settling at one go of major general, changes multistep into and puts in place; But bent angle that it still adopts and moulding are carried out synchronously.

Summary of the invention

The present invention has designed the tank support that suppressed of preface moulding in a kind of minute, the repeatedly new method of bent angle, and success for addressing this problem.

The present invention realizes through following technical measures: a kind of processing technology of bent angle flange trough girder tank support comprises following operation:

Operation one: cut system plate blank profile;

Operation two: plate blank is pressed into flange grooved straight beam;

Operation three: suppress bent angle successively and proofread and correct, make its bent angle requirement that reaches bent angle flange trough girder tank support, in the process of compacting bent angle the arc radius R of corner along with the increase R of the times N of compacting successively from large to small;

Operation four: carry out follow-up punching processing, accomplish the processing of tank support.

Wherein, the compacting times N of bent angle is preferred: N >=2.5Kh/ b, most preferably N gets, the smallest positive integral of the value of N >=2.5Kh/ b.

N---bent angle compacting number of times, round numbers;

K---bent angle coefficient, K=z/t, wherein z is the monolateral gap of punch and die; The z value is referring to the school shape calendering row in " metal punching workshop manual " front page the 489th page table 1 of National University of Polytech Press's in September, 1989 publication.The K value sees the following form 1.

Table 1

z	1.08 t	1.09 t	1.1 t	1.1 t
					K=z/t	1.08	1.09	1.1	1.1

H---cross section grooved height, the mm of unit;

B---section slot molded breadth degree, the mm of unit.

Beneficial effect of the present invention is: what the processing technology of this bent angle flange trough girder tank support adopted is Divide preface moulding, bent angle repeatedlyNew process; Be different from the invention of " during vehicle oil-tank bracket tension anti-cracking control method " (one-shot forming is repeatedly suppressed, cross section grooved and bent angle while moulding); Adopted cross section grooved and the bent angle pressing process of moulding respectively; Reduced the operation easier that the processor repeatedly stretches in once suppressing; Make the moulding simultaneously of complicated metal material cross section grooved and bent angle, become simple cross section grooved and the bent angle pressing process of moulding respectively, cracking or the ultra-thin phenomenon that cause the bent angle position of having avoided bent angle flange trough girder tank support of success in pressing process.

Description of drawings

Fig. 1 is the structural representation of bent angle flange trough girder tank support.

Fig. 1 a is the right view of Fig. 1.

Fig. 2 is dull and stereotyped straight forming method operation exploded view.

Fig. 3 is the dull and stereotyped bent angle of elder generation, secondary shaping method to suppress operation exploded view.

Fig. 4 is the operation exploded view of invention.

The specific embodiment

For clearly demonstrating the technical characterstic of this programme, through a specific embodiment, this programme is set forth below.

Shown in accompanying drawing, a kind of processing technology of bent angle flange trough girder tank support comprises following operation:

Operation one: cut system plate blank profile;

Operation two: plate blank is pressed into flange grooved straight beam;

Wherein, the compacting times N of bent angle is preferred: N >=2.5Kh/ b, and, most preferably N gets, the smallest positive integral of the value of N >=2.5Kh/ b.

N---bent angle compacting number of times, round numbers;

Table 1

z	1.08 t	1.09 t	1.1 t	1.1 t
					K=z/t	1.08	1.09	1.1	1.1

H---cross section grooved height, the mm of unit;

B---section slot molded breadth degree, the mm of unit.

With K---the bent angle coefficient, z gets 1.1t, then K=z/t=1.1; H---cross section grooved height h=40mm; B---section slot molded breadth degree b=92mm is example N >=2.5Kh/ b=2.5 * 1.1 * 40/92 ≈ 1.2, and the most preferably value of N is 2.

Can suppress at twice through calculating the bent angle of confirming tank support,, when suppressing tank support bent angle R2 for the second time, make the radius of corner RI＞R2 of corner so we behind the grooved of compacting fuel tank cross section, bend out 150 ° big bent angle R1 (see figure 4).Hence one can see that: tank support divides preface moulding, the new method of bent angle repeatedly; Make complicated tank support forming process; Two kinds of simple forming processes of cross section grooved and compacting bent angle have been resolved into; According to the degree of depth h of cross section, corner grooved and the definite number of times of suppressing bent angle of ratio of width b, guaranteed that tank support corner the even of metal material in pressing process flows, thereby eliminated the cracking or the ultra-thin phenomenon of tank support corner.

The present invention can pass through or adopt existing techniques in realizing without the technical characterictic of describing; Repeat no more at this; Certainly, above-mentioned explanation is not to be limitation of the present invention, and the present invention also is not limited in above-mentioned giving an example; Variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present invention also should belong to protection scope of the present invention.

Claims

1. the processing technology of a bent angle flange trough girder tank support is characterized in that, comprises following operation:

Operation one: cut system plate blank profile;

Operation two: plate blank is pressed into flange grooved straight beam;

2. the processing technology of bent angle flange trough girder tank support according to claim 1 is characterized in that, the compacting times N >=2.5Kh/ b of said bent angle,

Wherein, N---bent angle compacting number of times, round numbers;

K---bent angle coefficient, K=z/t, wherein z is the monolateral gap of punch and die;

H---cross section grooved height, the mm of unit;

B---section slot molded breadth degree, the mm of unit.