CN101850387A

CN101850387A - Compound die used for drawing and reverse drawing

Info

Publication number: CN101850387A
Application number: CN 201010210659
Authority: CN
Inventors: 董继刚; 唐旭东; 梁宏
Original assignee: 隆昌山川精密焊管有限责任公司
Priority date: 2010-06-28
Filing date: 2010-06-28
Publication date: 2010-10-06

Abstract

The invention discloses a compound die used for drawing and reverse drawing, which comprises an upper template, a die shank arranged on the upper template, a knockout rod, a liner plate and a lower template. The compound die is characterized in that a cylindrical female die and a forming block are fixedly arranged on the liner plate; the forming block is positioned in the female die; a male die matched with the female die is also fixedly arranged on the lower template; three or more guide posts are arranged on the lower template in a sliding mode; the upper ends of the guide posts are connected with a hollow discharging plate which is positioned on the outer side of the male die; and the lower ends of the guide posts are connected with a push plate. The compound die not only can improve the processing efficiency, but also has good product quality and a low rejection rate and reduces the comprehensive cost.

Description

Be used to stretch and the compound die of negative drawing

Technical field

The present invention relates to a kind ofly be used to stretch and the compound die of negative drawing.

Background technology

This class part is a punching stretch spare 15 as shown in Figure 1, and also at 9 grades, height dimension h1, h2 coherence request in circumference range is higher, and piece surface must not be pulled bad vestiges such as cut at 9 grades, axiality precision prescribed for stretching appearance and size precision; Need adopt three mold branches by traditional drawing process: ⑴ one-off drawing ⑵ one-off drawing shaping ⑶ reverse-drawing shaping three-procedure is finished, at first be that this class part is drawn into U-shaped spare earlier, and then carry out negative drawing, determine final size by shaping at last, operation is more, not only efficient is lower, and product is difficult to when axiality is had relatively high expectations in the negative drawing process guarantee, and it is big at the blank outside dimension, under the situation of material thickness directly during negative drawing h1 and h2 be difficult for guaranteeing, highly inconsistent on the circumference, product quality is relatively poor, and percent defective is higher, and integrated cost is higher.

Summary of the invention

The objective of the invention is to the above-mentioned deficiency at prior art, provide a kind of and be used to stretch and the compound die of negative drawing, it can not only improve working (machining) efficiency, and good product quality, and percent defective is lower, has reduced integrated cost.

For achieving the above object, of the present inventionly be used to stretch and the compound die of negative drawing, comprise cope match-plate pattern, be located at die shank, knockout rod and backing plate, the lower bolster of cope match-plate pattern, it is characterized in that on backing plate, also being installed with the die and the shaping piece of tubular, the shaping piece is arranged in die, on lower bolster, also be installed with the punch that cooperates with die, at the guide pillar that also is provided with slidably on the lower bolster more than three or three, the guide pillar upper end all is connected with the stripper of a hollow, stripper is positioned at the outside of punch, and the guide pillar lower end all is connected with a push pedal.

During use, mould can be linked to each other with hydraulic press, blank is placed on starts hydraulic press on the stripper, under the effect of punch, blank is pressed into die, hydraulic press continues to press down after blank is all drawn in die, makes the shaping piece with the part punching moulding, realizes negative drawing, when the hydraulic press backhaul push pedal is applied external force (by oil cylinder etc.), stripper ejects part; Be combined in in-process with reverse-drawing and finish owing to will stretch, not only improved working (machining) efficiency, and axiality is guaranteed, good product quality, percent defective is lower, has reduced integrated cost; Carry out a negative drawing shaping again and can obtain final product;

As a further improvement on the present invention, when using on punch press, also be installed with support bar on lower bolster, support bar slides passes push pedal, and on the support bar below the push pedal, be provided with setscrew nut and limiting plate, on the support bar between push pedal and the limiting plate, also be set with the rubber sleeve that resets; When the punch press backhaul, rely on the effect of the rubber sleeve that resets, push pedal, stripper reset part are ejected, and are convenient to discharging;

In sum, the present invention can not only improve working (machining) efficiency, and good product quality, and percent defective is lower, has reduced integrated cost.

Description of drawings

Fig. 1 is the front view of target product.

Fig. 2 is the front view of the embodiment of the invention one.

Fig. 3 is the front view of the embodiment of the invention two.

The specific embodiment

The present invention is further detailed explanation below in conjunction with accompanying drawing.

Embodiment one

As shown in Figure 2, this is used to stretch and the compound die of negative drawing, comprise cope match-plate pattern 1, be located at die shank, knockout rod 2 and backing plate 3, the lower bolster 4 of cope match-plate pattern 1, on backing plate 3, also be installed with the die 5 and the shaping piece 6 of tubular by screw, shaping piece 6 is arranged in die 5, on lower bolster 4, also be installed with the punch 7 that cooperates with die 5 by screw, on lower bolster 4, also be provided with three guide pillars 8 slidably, guide pillar 8 upper ends all are connected with the stripper 9 of a hollow, stripper 9 is positioned at the outside of punch 7, and guide pillar 8 lower ends all are connected with a push pedal 10;

During use, mould can be linked to each other with hydraulic press, blank is placed on the stripper 9 starts hydraulic press, under the effect of punch 7, blank is pressed into die 5, all draw in die 5 back hydraulic presses at blank and continue to press down, make shaping piece 6, realize negative drawing the part punching moulding, when the hydraulic press backhaul push pedal 10 is applied external force (by oil cylinder etc.), stripper 9 ejects part; Be combined in in-process with reverse-drawing and finish owing to will stretch, not only improved working (machining) efficiency, and axiality is guaranteed, good product quality, percent defective is lower, has reduced integrated cost; Carry out a negative drawing shaping again and can obtain final product.

Embodiment two

As shown in Figure 3, when the compound die of this embodiment uses on punch press, only be with the difference of embodiment one: on lower bolster 4, also be installed with support bar 11, support bar 11 slides passes push pedal 10, and on the support bar below the push pedal 10 11, be provided with setscrew nut 12 and limiting plate 13, on the support bar 11 between push pedal 10 and the limiting plate 13, also be set with the rubber sleeve 14 that resets; When the punch press backhaul, rely on the effect of the rubber sleeve 14 that resets, push pedal 10, stripper 9 reset part are ejected, and are convenient to discharging.

Claims

1. one kind is used to stretch and the compound die of negative drawing, comprise cope match-plate pattern, be located at die shank, knockout rod and backing plate, the lower bolster of cope match-plate pattern, it is characterized in that on backing plate, also being installed with the die and the shaping piece of tubular, the shaping piece is arranged in die, on lower bolster, also be installed with the punch that cooperates with die, at the guide pillar that also is provided with slidably on the lower bolster more than three or three, the guide pillar upper end all is connected with the stripper of a hollow, stripper is positioned at the outside of punch, and the guide pillar lower end all is connected with a push pedal.

2. as claimed in claim 1ly be used to stretch and the compound die of negative drawing, it is characterized in that on lower bolster, also being installed with support bar, support bar slides passes push pedal, and on the support bar below the push pedal, be provided with setscrew nut and limiting plate, on the support bar between push pedal and the limiting plate, also be set with the rubber sleeve that resets.