CN1163321C

CN1163321C - Coiling and press-levelling formation method for sheet metal material

Info

Publication number: CN1163321C
Application number: CNB001174894A
Authority: CN
Inventors: 刘耀泽
Original assignee: FUJIN PRECISION INDUSTRY (SHENZHEN) CO LTD; Hon Hai Precision Industry Co Ltd
Current assignee: FUJIN PRECISION INDUSTRY (SHENZHEN) CO LTD; Hon Hai Precision Industry Co Ltd
Priority date: 2000-09-25
Filing date: 2000-09-25
Publication date: 2004-08-25
Anticipated expiration: 2020-09-25
Also published as: CN1345639A

Abstract

The present invention relates to a coiling and leveling shaping method for metal plates. The method mainly comprises the following steps: a first mould assembly is provided, a bending line is formed on a workpiece at the position to be bent, and a bent end whose filler radius is 1.0mm is formed at the end of the workpiece; a second mould assembly is provided, and the workpiece is bent to 90 degrees along the bending line; a third mould assembly is provided, the workpiece is levelled along the bending line, and the bent end of the workpiece is levelled.

Description

Coiling and press-levelling formation method for sheet metal material

The invention relates to a kind of coiling and press-levelling formation method for sheet metal material, refer to that especially a kind of finished size is stable, the coiling and press-levelling formation method for sheet metal material of no wire drawing phenomenon.

In the stamping process of sheet metal, regular meeting uses and flattens manufacturing process.Usually the method that the pressing known to is shaped is a lot, and as bending pressing, side stretch, reel stretch etc., and for sheet metal, it is important that the reel stretch manufacturing process shows especially.

The reel stretch manufacturing process has multiplely in the prior art, and as shown in Figure 1, it is earlier to desire the bending part line ball at workpiece, the degree of depth of line ball normally thickness of workpiece 1/2, the work status after this operation is as shown in the reference numeral 11; Then, workpiece is bent into 90 degree along bending line, the work status after this operation as shown in the reference numeral 12; At last, along bending line workpiece is flattened, the work status after this operation as shown in the reference numeral 13.

As shown in Figure 2, be another kind of reel stretch manufacturing process in the prior art, it is to desire the bending part line ball at workpiece earlier, the work status after this operation is shown in label 11 '; Then, workpiece is bent into 90 degree along bending line, the work status after this operation is shown in label 12 '; Afterwards, further be bent into 45 degree angles, the work status after this operation as shown in the reference numeral 21; At last, along bending line workpiece is flattened, the work status after this operation is shown in label 13 '.

As shown in Figure 3, it is another reel stretch manufacturing process in the prior art, it is to desire bending part line ball (mode is with above-mentioned) at workpiece earlier, fall simultaneously the fillet that radius is 1.0mm at the base angle of bending segment, and keep 1/2 the vertical section of thickness of workpiece T, the work status after this operation as shown in the reference numeral 31; Then, workpiece is bent into 90 degree along bending line, the work status after this operation is as label 12 " shown in; At last, along bending line workpiece is flattened, the work status after this operation is as label 13 " shown in.

All there is the wire drawing phenomenon in above-mentioned three kinds of reel stretch manufacturing process, see also Fig. 4, in the forming process that workpiece is flattened, when drift 40 when the arrow A direction is moved, owing to produce a bigger downward strength, drift 40 will produce friction with the vertical part 52 of workpiece 50, and cause drift 40 from workpiece 50 vertically the sidewalls 522 of parts 52 scrape iron filings 54 (being the wire drawing phenomenon) as the intimate hair of some diameters, have a strong impact on the size and the quality of finished product.

Therefore, how to provide a kind of pressing manufacturing process that makes finished size stablize and thoroughly eliminate the wire drawing phenomenon, real is problem extremely to be solved.

The object of the present invention is to provide that a kind of finished size is stable, the coiling and press-levelling formation method for sheet metal material of no wire drawing phenomenon.

For achieving the above object, the present invention has adopted following technical scheme: first die assembly is provided, and at bending line of desire bending part formation of workpiece, and at crooked end that fillet radius is 1.0mm of the end of workpiece formation; Second die assembly is provided, workpiece is bent into 90 degree along bending line; The 3rd die assembly is provided, workpiece is flattened, and the crooked end of workpiece is flattened along bending line.

Compared with prior art, the present invention makes finished size stablize, eliminate the wire drawing phenomenon.

Below in conjunction with accompanying drawing embodiments of the invention are specifically described:

Fig. 1 is the schematic diagram of a kind of reel stretch manufacturing process of the prior art.

Fig. 2 is the schematic diagram of another kind of reel stretch manufacturing process of the prior art.

Fig. 3 is the schematic diagram of another reel stretch manufacturing process of the prior art.

Fig. 4 is the wire drawing phenomenon schematic diagram of reel stretch manufacturing process of the prior art.

Fig. 5 is the line ball of coiling and press-levelling formation method for sheet metal material of the present invention and the schematic diagram of bending workpieces end process.

Fig. 6 is the schematic diagram of the bending process of coiling and press-levelling formation method for sheet metal material of the present invention.

Fig. 7 is the schematic diagram of the applanation process of coiling and press-levelling formation method for sheet metal material of the present invention.

Now see also Fig. 5, it is the schematic diagram of line ball and bending workpieces end process in the coiling and press-levelling formation method for sheet metal material of the present invention, and this process is by drift 60, lower bolster 70 and inserts and 80 realize.Wherein, drift 60 is provided with a filleted corner 62, is used for bull nose 92 on Forming Workpiece 90 ends, and its radius is that the thickness of workpiece adds 1.0mm.Inserting 80 is installed in the lower bolster 70, and its end face is concordant with the end face of

lower bolster

70, and 80 the end face inserted is provided with a raised line 82, and it highly is 1/2 of workpiece 90 thickness.80 the end angle bull nose 84 that to be provided with a radius be 1.0mm of inserting is used for filleted corner 96 on Forming Workpiece 90 ends.When workpiece 90 is placed on the lower bolster 70, the desire bending part of workpiece 90 is placed on 80 the raised line 82 inserted, and the end of workpiece 90 is stretched out insert outside 80 the end angle.When drift 60 times towards the time, on workpiece 90, form a bending line 94 by inserting 80 raised line 82, and the filleted corner 62 by drift 60 forms a crooked end 98 with inserting 80 bull nose 84 in the end of workpiece 90.

Now see also Fig. 6, it is the schematic diagram of the bending process of coiling and press-levelling formation method for sheet metal material of the present invention, and this process is to realize by drift 60 ' and lower bolster 70 '.Wherein, the inwall 706 ' of the gathering sill 702 ' of lower bolster 70 ' is provided with a slotted eye 704 '.Workpiece 90 is lain on the lower bolster 70 ', and the bending line 94 of workpiece 90 is positioned on the seamed edge 708 ' of lower bolster 70 '.When drift 60 ' when the arrow A direction is moved, workpiece 90 will be bent into 90 degree along bending line 94 places, and the crooked end 98 of workpiece 90 will enter and be housed in the slotted eye 704 ', this moment workpiece 90 state as shown in the reference numeral 1.

Now see also Fig. 7, it is the schematic diagram of the applanation process of coiling and press-levelling formation method for sheet metal material of the present invention, and this process is by drift 60 " and lower bolster 70 " realize.Wherein, drift 60 " have a filleted corner 602 ".Workpiece 90 is placed on lower bolster 70 " on, and the crooked end 98 that makes workpiece 90 oppositely up and align drift 60 " filleted corner 602 ".When drift 60 " when the arrow B direction is moved, workpiece 90 will further bend along bending line 94 places, and then crooked end 98 is flattened, the state after workpiece 90 is driven plain is as shown in the reference numeral 2.

Coiling and press-levelling formation method for sheet metal material of the present invention when extruding folding line 94, the filleted corner 96 that to bend out a radius in the end of workpiece 90 be 1.0mm, and make workpiece 90 form a crooked end 98.In the forming process that workpiece 90 is flattened, arc structure design by crooked end 98, drift 60 " direction that is applied to the strength on the workpiece 90 can change, and downward component is less, so can thoroughly eliminate the wire drawing phenomenon and guarantee that finished size is stable.

Claims

1. coiling and press-levelling formation method for sheet metal material, this method provides one first die assembly, and this first die assembly comprises one first drift and one first lower bolster; One second die assembly is provided, and this second die assembly comprises one second drift and one second lower bolster; One the 3rd die assembly is provided, the 3rd die assembly comprises one the 3rd drift and one the 3rd lower bolster, it is characterized in that: this first die assembly also comprises to be inserted, this is inserted and has a raised line and a bull nose, this raised line is used for forming a bending line at the desire bending part of workpiece, this first drift has a filleted corner, and the end that this filleted corner and this bull nose of inserting are engaged in workpiece forms a crooked end; This second die assembly is bent into 90 degree with workpiece along this bending line, offers the crooked end that a slotted eye is accommodated this workpiece in this second lower bolster; The 3rd drift of the 3rd die assembly has the crooked end that a filleted corner aligns this workpiece, and the 3rd die assembly flattens workpiece along this bending line, and the crooked end of workpiece is flattened.

2. coiling and press-levelling formation method for sheet metal material as claimed in claim 1 is characterized in that: the fillet radius of this crooked end is 1.0mm.

3. coiling and press-levelling formation method for sheet metal material as claimed in claim 1 is characterized in that: the degree of depth of this bending line is 1/2 of a thickness of workpiece.

4. coiling and press-levelling formation method for sheet metal material as claimed in claim 1 is characterized in that: this is inserted and is contained in first lower bolster, and its end face is concordant with the end face of first lower bolster.

5. coiling and press-levelling formation method for sheet metal material as claimed in claim 1 is characterized in that: this second lower bolster has a gathering sill, and this slotted eye is opened in the inwall of this gathering sill.