CN103894486A

CN103894486A - Novel high-precision U-shaped bending die

Info

Publication number: CN103894486A
Application number: CN201410102863.XA
Authority: CN
Inventors: 唐良华
Original assignee: Chengdu Limit Precision Die Co Ltd
Current assignee: Chengdu Limit Precision Die Co Ltd
Priority date: 2014-03-20
Filing date: 2014-03-20
Publication date: 2014-07-02

Abstract

The invention relates to a novel high-precision U-shaped bending die. The bending die comprises an upper die base (1), a lower die base (2), a die shank (3), a plurality of guide pillars (4), a male die (5), a female die (6) and a discharge mechanism, wherein the lower ends of the guide pillars (4) are fixed to the lower die base (2) and perpendicular to the end face of the lower die base (2), the upper portions of the guide pillars (4) are matched with the upper die base (1), the male die (5) is fixedly installed in the middle of the lower side of a male die fixing plate (7), the die shank (3) penetrates through the upper die base (1) to be fixed to the male die (5) and is coaxial with the male die (5), the female die (6) is fixed above the lower die base (2) and aligns with the male die (5), and the discharge mechanism comprises a fixed discharge plate (9), a discharge bolt (13) and a discharge block (14). The bending die has the advantages that the bending die is long in service life, low in maintenance cost and high in bending and forming precision, and workpieces can be taken out easily.

Description

The U-shaped bending die of a kind of novel high accuracy

Technical field

The present invention relates to technical field of mold, particularly the U-shaped bending die of a kind of novel high accuracy.

Background technology

Since reform and opening-up, along with the high speed development of national economy, market constantly increases the demand of mould.In recent years, mould industry is always with the growth rate fast development of 15% left and right, and great variety has also occurred the ownership composition of mould industry enterprise, except state-owned professional mould factory, and collective, joint, individual proprietorship and be privately also developed rapidly.In recent years many Mould Enterprises have strengthened the dynamics of investment for technological progress, technological progress are considered as to the important motivity of enterprise development.Some domestic Mould Enterprises have been popularized two-dimentional CAD, and bring into use successively the international softwares such as UG, Pro/Engineer, I-DEAS, Euclid-IS.

The guiding of guide colume type bending die than guide plate die accurately and reliably, and can ensure the even of its gap, workpiece accuracy is higher, die life is long, and easy to install on punch press, therefore guide colume type bending die is most widely used a kind of punch die, is applicable to producing in enormous quantities.On the one hand, in use, between guide pillar and upper bolster, produce relative displacement, after long-term use, upper bolster serious wear, cannot ensure its operating accuracy, and the manufacturing cost of upper bolster is high, and replacing is wasted time and energy; On the other hand, die coordinates with punch after workpiece brake forming, and workpiece is embedded in die, is difficult for taking out.

Summary of the invention

The object of the invention is to overcome the shortcoming of prior art, the U-shaped bending die of novel high accuracy that a kind of long service life, maintenance cost are low and workpiece easily takes out is provided.

Object of the present invention is achieved through the following technical solutions: the U-shaped bending die of a kind of novel high accuracy, it comprises upper bolster, die shoe, die shank, guide pillar, punch, die and shedding mechanism, the lower end of many guide pillars is fixed on die shoe, and vertical with the end face of die shoe, the top of guide pillar coordinates with upper bolster; The below of upper bolster is provided with punch retainer, and positions by alignment pin, and punch is fixedly mounted on punch retainer downside centre position, and die shank passes upper bolster and is fixed on punch, and die shank and punch coaxial line; Described die is fixed on die shoe top, and die aligns with punch;

Described shedding mechanism comprises fixed stripper, stripper bolt and unloading block, and stripper is fixedly mounted on the upper surface of die, and unloading block is arranged at the cooperation position below of die and punch, and stripper bolt is passed die shoe and is fixed in unloading block.

Described upper bolster is also provided with guide pin bushing respectively and between each root guide pillar, and guide pin bushing is fixed on upper bolster, and the top of guide pin bushing and guide pillar is slidably matched.

Between described punch retainer and upper bolster, be also provided with convex mould pad, between described die and die shoe, be also provided with die backing plate.

The outside of described stripper bolt is also set with spring, and the upper end of spring is fixed on the lower surface of unloading block, and the lower end of spring is fixed on die shoe by the plug screw of threaded engagement.

The present invention has the following advantages:

1, between guide pillar and upper bolster, guide pin bushing is set, guide pin bushing is fixed on upper bolster, moves up and down in process at upper bolster, guide pillar directly coordinates with guide pin bushing, after guide pin bushing wearing and tearing, change guide pin bushing and can ensure original precision, and it is time saving and energy saving to change guide pin bushing, has significantly reduced maintenance cost.

2, shedding mechanism is set on die shoe, when after brake forming, moves by regulating stripper bolt to drive in unloading block, workpiece is ejected to die, convenient and swift.

3, between upper bolster and punch retainer, die shoe and die, backing plate is set respectively, in the time that workpiece is pressed to die by punch, backing plate plays cushioning effect, and the rebound amount after the moulding of reduction workpiece, promotes the accuracy of manufacture.

Brief description of the drawings

Fig. 1 is structural representation of the present invention;

In figure: 1-upper bolster, 2-die shoe, 3-die shank, 4-guide pillar, 5-punch, 6-die, 7-punch retainer, 8-convex mould pad, the fixed stripper of 9-, 10-guide pin bushing, 11-die backing plate, 12-spring, 13-stripper bolt, 14-unloading block, 15-alignment pin, 16-plug screw.

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention will be further described, but protection scope of the present invention is not limited to the following stated.

As shown in Figure 1, the U-shaped bending die of novel high accuracy, it comprises upper bolster 1, die shoe 2, die shank 3, guide pillar 4, punch 5, die 6 and shedding mechanism, the lower end of many guide pillars 4 is fixed on die shoe 2, and vertical with the end face of die shoe 2, the top of guide pillar 4 coordinates with upper bolster 1; The below of upper bolster 1 is provided with punch retainer 7, and positions by alignment pin 15, and punch 5 is fixedly mounted on punch retainer 7 downside centre positions, and die shank 3 passes upper bolster 1 and is fixed on punch 5, and die shank 3 and punch 5 coaxial lines; Described die 6 is fixed on die shoe 2 tops, and die 6 aligns with punch 5; Described shedding mechanism comprises fixed stripper 9, stripper bolt 13 and unloading block 14, stripper 9 is fixedly mounted on the upper surface of die 6, unloading block 14 is arranged at the cooperation position below of die 6 and punch 5, and stripper bolt 13 is passed die shoe 2 and is fixed in unloading block 14.

Described upper bolster 1 is also provided with guide pin bushing 10 respectively and between each root guide pillar 4, and guide pin bushing 10 is fixed on upper bolster 1, and guide pin bushing 10 is slidably matched with the top of guide pillar 4.

Between described punch retainer 7 and upper bolster 1, be also provided with convex mould pad 8, between described die 6 and die shoe 2, be also provided with die backing plate 11.

The outside of described stripper bolt 13 is also set with spring 12, and the upper end of spring 12 is fixed on the lower surface of unloading block 14, and the lower end of spring 12 is fixed on die shoe 2 by the plug screw 16 of threaded engagement.

The course of work of the present invention is as follows: before pressing mold, upper bolster 1 is promoted to extreme higher position by die shank 3, punch 5 is separated with die 6, the workpiece of moulding to be bent is placed on to the upper surface of die 6, regulate stripper bolt 13, make the upper surface of unloading block 14 be greater than the pressing mold degree of depth to the distance between the upper surface of die 6, drive die shank 4 to move down by forcing press, upper bolster 1 down moves along guide pillar 4, and drive punch 5 to move down, die 6 coordinates with punch 5, by workpiece brake forming, after workpiece sizing, forcing press drives on upper bolster 1 and moves, until die 6 exits punch 5, and leave sufficient space and take out workpiece, regulate unloading bolt 13, drive in unloading block 14 and move, and eject workpiece, until workpiece drops out die 6.

Claims

1. the U-shaped bending die of novel high accuracy, it is characterized in that: it comprises upper bolster (1), die shoe (2), die shank (3), guide pillar (4), punch (5), die (6) and shedding mechanism, the lower end of many guide pillars (4) is fixed on die shoe (2), and vertical with the end face of die shoe (2), the top of guide pillar (4) coordinates with upper bolster (1); The below of upper bolster (1) is provided with punch retainer (7), and position by alignment pin (15), punch (5) is fixedly mounted on punch retainer (7) downside centre position, die shank (3) is through upper bolster (1) and be fixed on punch (5) above, and die shank (3) and punch (5) coaxial line; Described die (6) is fixed on die shoe (2) top, and die (6) aligns with punch (5);

Described shedding mechanism comprises fixed stripper (9), stripper bolt (13) and unloading block (14), stripper (9) is fixedly mounted on the upper surface of die (6), unloading block (14) is arranged at the cooperation position below of die (6) and punch (5), and stripper bolt (13) is passed die shoe (2) and is fixed in unloading block (14).

2. the U-shaped bending die of a kind of novel high accuracy according to claim 1, it is characterized in that: described upper bolster (1) is also provided with guide pin bushing (10) respectively and between each root guide pillar (4), and it is upper that guide pin bushing (10) is fixed on upper bolster (1), guide pin bushing (10) is slidably matched with the top of guide pillar (4).

3. the U-shaped bending die of a kind of novel high accuracy according to claim 1, it is characterized in that: between described punch retainer (7) and upper bolster (1), be also provided with convex mould pad (8), between described die (6) and die shoe (2), be also provided with die backing plate (11).

4. the U-shaped bending die of a kind of novel high accuracy according to claim 1, it is characterized in that: the outside of described stripper bolt (13) is also set with spring (12), the upper end of spring (12) is fixed on the lower surface of unloading block (14), the lower end of spring (12) be fixed on the plug screw (16) of die shoe (2) by threaded engagement on.