CN201186321Y

CN201186321Y - Enclasping type cup shell drawing mold

Info

Publication number: CN201186321Y
Application number: CNU2007203114211U
Authority: CN
Inventors: 杨立军; 党新安; 张昌松; 李端阳
Original assignee: Shaanxi University of Science and Technology
Current assignee: Shaanxi University of Science and Technology
Priority date: 2007-12-26
Filing date: 2007-12-26
Publication date: 2009-01-28
Anticipated expiration: 2017-12-26

Abstract

The utility model relates to an enclasping type cup shell drawing die, which comprises an upper die holder and a lower die holder, wherein a convex die and a concave die which are mutually corresponding are respectively arranged on the upper die holder and the lower die holder, a discharge screw which is connected with the upper die holder and a blank holder spring which is sleeved on the discharge screw are arranged outside the convex die, a blank holder is arranged on the lower end of the discharge screw, a containing frame which is fixedly connected with the lower die holder is arranged outside the concave die, a conical pushing block and a rubber pad are arranged in the containing frame from the top to the bottom in turn, a conical enclasping part which is matched with the convex die is also arranged in the conical pushing block, a spring seat is arranged on the lower end of the lower die holder, a material squeezing spring is arranged in the spring seat, a push rod which is threaded through the rubber pad, the conical pushing block and the conical enclasping part is arranged on the upper end of the material squeezing spring, and springs are sleeved outside the push rod. The enclasping type cup shell drawing die executes enclasping on the side wall direction in the cup shell drawing process, the material flow trend is changed, the wall thickness changes are even, and the maximum thickness reduction on the dangerous section in the drawing process is reduced to prevent tension cracks.

Description

A kind of tight-holding type cup shell cupping tool

Technical field

The utility model relates to a kind of cupping tool, is specifically related to a kind of tight-holding type cup shell cupping tool.

Background technology

Cupping tool is the mould that the most generally uses in the punching production, mainly utilizes the plastic deformation of metal material needed part that is shaped, and can be widely used for being shaped.

Variation has all taken place in material each several part thickness during drawing and forming, and variation is uneven.After drawing part was shaped, the oral area material of drawing part was the thickest, attenuate gradually inward, and be subjected to the top power and the flecition of punch-nose angle in the fillet part material pull and stretch of bottom all the time, and in whole pull and stretch, be subjected to action of pulling stress always, cause attenuation maximum herein.Because this characteristics of deep-drawing deformation make that on the one hand the wall unevenness of drawing part is even, do not reach the serviceability requirement.Simultaneously, in drawing process easily in the drawing crack of wall thickness thinnest part.

Summary of the invention

The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, provide a kind of simple in structure, easy to use and reliable, be easy to make, to improving cup shell drawing and forming quality and reducing the tight-holding type cup shell cupping tool that the drawing crack defective has significant effect.

For achieving the above object, the technical solution adopted in the utility model is: comprise upper bolster and die shoe, upper bolster is connected by guide pillar with die shoe, on upper bolster and die shoe, be respectively arranged with the punch and the die of mutual correspondence, the arranged outside of punch has the discharging screw that is connected with upper bolster and is sleeved on flanging spring on the discharging screw, lower end at the discharging screw is provided with blank holder, arranged outside at die has the appearance frame of fixedlying connected with die shoe, hold in the frame and be disposed with taper pushing block and rubber blanket from top to bottom, also be provided with the taper that matches with punch in the taper pushing block and hold part tightly, lower end at die shoe is provided with spring base, and in spring base, be provided with the liftout spring, on the liftout spring, be provided with and run through rubber blanket, the push rod of part is held in taper pushing block and taper tightly, is with spring outside the item bar.

Punch of the present utility model and discharging screw all are connected with upper bolster by the patrix fixed block; Also be set with guide pin bushing on the guide pillar; It is that the identical piece of holding tightly of three lobe sizes, shape constitutes that part is held in taper tightly, and this holds piece tightly along circumferentially evenly distributing; Push rod is the step-like cylinder of the diameter of a upper end less than lower end diameter.

Because the utility model is implemented to hold tightly in sidewall direction in the cup shell drawing process, changes the material flow tendency, makes wall thickness change even; Reduce the maximum attenuation amount at dangerouse cross-section place in the drawing process, prevent drawing crack.

Description of drawings

Below in conjunction with the drawings and the specific embodiments the utility model is described in further detail.

Fig. 1 is an overall structure schematic diagram of the present utility model.

The specific embodiment

Referring to Fig. 1, the utility model comprises upper bolster 8 and die shoe 1, upper bolster 8 is connected by guide pillar 2 with die shoe 1, also be set with guide pin bushing 10 on the guide pillar 2, on upper bolster 8 and die shoe 1, be respectively arranged with the punch 12 and the die 7 of mutual correspondence, the arranged outside of punch 12 has the discharging screw 11 that is connected with upper bolster 8 and is sleeved on flanging spring 13 on the discharging screw 11, be provided with blank holder 14 in the lower end of discharging screw 11, punch 12 and discharging screw 11 all are connected with upper bolster 8 by patrix fixed block 9, arranged outside at die 7 has the appearance frame 3 of fixedlying connected with die shoe 1, hold in the frame 3 and be disposed with taper pushing block 5 and rubber blanket 4 from top to bottom, also be provided with the taper that matches with punch 12 in the taper pushing block 5 and hold part 6 tightly, it is three lobe sizes that part 6 is held in taper tightly, the piece of holding tightly that shape is identical constitutes, this holds piece tightly along circumferentially evenly distributing, be provided with spring base 17 in the lower end of die shoe 1, and in spring base 17, be provided with liftout spring 18, be provided with in liftout spring 18 upper ends and run through rubber blanket 4, taper pushing block 5 and taper are held the diameter of upper end of part 6 tightly less than the step-like cylinder push rod 15 of lower end diameter, are with spring 16 outside item bar 15.

The course of work of the present utility model is as follows: upper bolster 8 is descending, under the effect of flanging spring 13 and blank holder 14, plate is compressed the beginning pull and stretch, during the beginning pull and stretch, under the acting in conjunction of liftout spring 18 and spring 16, the major diameter position of push rod 15 is in taper holds tightly in the central small hole of part 6, holds piece tightly and is outwards opening.Upper bolster 8 continues descending, and material is drawn in the die 7 gradually, and this moment, push rod 15 retreated thereupon, and liftout spring 18 and spring 16 are compressed.Along with punch 12 continuation are descending, punch 12 drives workpiece and is pressed onto the bottom that part 6 is held in taper tightly, and the promotion taper is held part 6 tightly and moved down.This moment, the minor diameter position of push rod 15 entered in the hole that taper holds part 6 tightly, because the power of holding tightly of rubber blanket 4 is bigger, taper pushing block 5 amounts of moving down are little, and under the effect of the conical surface, three lobes are held piece tightly and radially drawn close simultaneously, and workpiece is held tightly within it.Punch 12 continues descending, because the compression of rubber blanket 4, the power of holding tightly further increases, workpiece bottom and sidewall hold tightly under the state along with push rod 15, taper hold tightly part 6, taper pushing block 5 simultaneously rigidity move down and carry out pull and stretch, until pull and stretch to lower dead point position.When upper bolster 8 makes progress return, under the acting in conjunction of rubber blanket 4, liftout spring 18, spring 16, part 6 is held in push rod 15, taper tightly and taper pushing block 5 moves simultaneously, taper pushing block 5 stop motions when rubber blanket 4 is in normal condition, push rod 15, taper are held part 6 relative taper pushing blocks 5 tightly and are continued to move upward, add acting on the punch 12, workpiece is ejected taper gradually hold part 6 and die 7 tightly to upper pulling force (frictional force).Taper is simultaneously held part 6 tightly successively under the effect of push rod 15 major diameters part, outwards open, for next pull and stretch ready.

Claims

1, a kind of tight-holding type cup shell cupping tool, comprise upper bolster (8) and die shoe (1), upper bolster (8) is connected by guide pillar (2) with die shoe (1), on upper bolster (8) and die shoe (1), be respectively arranged with the punch (12) and the die (7) of mutual correspondence, it is characterized in that: the arranged outside of punch (12) has the discharging screw (11) that is connected with upper bolster (8) and is sleeved on flanging spring (13) on the discharging screw (11), be provided with blank holder (14) in the lower end of discharging screw (11), arranged outside at die (7) has the appearance frame (3) of fixedlying connected with die shoe (1), hold in the frame (3) and be disposed with taper pushing block (5) and rubber blanket (4) from top to bottom, also be provided with the taper that matches with punch (12) in the taper pushing block (5) and hold part (6) tightly, be provided with spring base (17) in the lower end of die shoe (1), and in spring base (17), be provided with liftout spring (18), on liftout spring (18), be provided with and run through rubber blanket (4), the push rod (15) of part (6) is held in taper pushing block (5) and taper tightly, is with spring (16) outside item bar (15).

2, tight-holding type cup shell cupping tool according to claim 1 is characterized in that: said punch (12) and discharging screw (11) all are connected with upper bolster (8) by patrix fixed block (9).

3, tight-holding type cup shell cupping tool according to claim 1 is characterized in that: also be set with guide pin bushing (10) on the said guide pillar (2).

4, tight-holding type cup shell cupping tool according to claim 1 is characterized in that: it is that the identical piece of holding tightly of three lobe sizes, shape constitutes that part (6) is held in said taper tightly, and this holds piece tightly along circumferentially evenly distributing.

5, tight-holding type cup shell cupping tool according to claim 1 is characterized in that: said push rod (15) is the step-like cylinder of the diameter of a upper end less than lower end diameter, passes through conical surface transition between big footpath and the path.