CN102773348A

CN102773348A - Precise drawing die

Info

Publication number: CN102773348A
Application number: CN2012102821314A
Authority: CN
Inventors: 袁帅
Original assignee: KUNSHAN BOXIANG PRECISION HARDWARE PRODUCTS CO Ltd
Current assignee: KUNSHAN BOXIANG PRECISION HARDWARE PRODUCTS CO Ltd
Priority date: 2012-08-09
Filing date: 2012-08-09
Publication date: 2012-11-14

Abstract

The invention discloses a precise drawing die. Elastic piece positioning holes, ejector rob penetrating holes and punch positioning holes which are coaxial are arranged on an upper die base, an upper clamp plate and an upper base plate respectively, elastic pieces are inserted into the elastic piece positioning holes, the upper ends of the elastic pieces are fixedly connected to the upper die base, the lower ends of the elastic pieces abut tightly against the upper ends of ejector robs which are T-shaped and with the diameter of the upper ends larger than that of the lower ends, the upper ends of the ejector robs are accommodated in the elastic piece positioning holes, the lower ends of the ejector robs are accommodated in the ejector rob penetrating holes, the diameter of the ejector rob penetrating holes is between the diameters of the upper end and the lower end, the lower ends of the ejector robs stretch into the punch positioning holes, the lower ends of the ejector robs are blocked at punch upper ends arranged inside, the diameter of the punch upper ends is larger than that of the ejector rob penetrating holes, and the ejector robs can slide longitudinally to set the distance. According to the precise drawing die, pit drawing can be achieved accurately and rapidly, damages of punches are effectively avoided, the punching cost is reduced, and the production efficiency and the punching quality are improved.

Description

Accurate stretching die

Technical field

The present invention relates to a kind of diel, particularly a kind of accurate stretching die.

Background technology

Hardware products is when and diameter less pit big to the degree of depth stretches; Because the little length of punching pin diameter is long, itself is very fragile, and its moment huge impact power that under patrix drives, contacts with strip is easy to cause the punching pin fracture or damages; Thereby need the frequent change punching pin; Increase cost of stamping, reduced production efficiency, the quality of stretching is difficult to guarantee.

Summary of the invention

In order to overcome above-mentioned defective, the invention provides a kind of accurate stretching die, this precision stretching die can be realized the stretching of pit accurately and rapidly, effectively avoids the damage of punching pin, has reduced the punching press expense, has improved production efficiency and stamping quality.

The present invention for the technical scheme that solves its technical problem and adopt is: a kind of accurate stretching die, comprise upper bolster, train wheel bridge, upper padding plate, elastic component, push rod and punching pin, and said upper bolster, train wheel bridge and upper padding plate are connected from top to bottom successively; Be respectively equipped with coaxial elastic component locating hole, push rod on upper bolster, train wheel bridge and the upper padding plate and place hole and punching pin locating hole, said elastic component is inserted in the elastic component locating hole, and the elastic component upper end is connected with upper bolster; The elastic component lower end is tight against the push rod upper end, and push rod is the T shape bar of upper end diameter greater than lower end diameter, and said push rod upper end is placed in the elastic component locating hole; The push rod lower end is placed in push rod and places in the hole, and said push rod places bore dia between push rod up and down between the diameter of two ends, and said push rod lower end stretches in the punching pin locating hole; And the punching pin upper end of push rod lower end backstop in being inserted in it, said punching pin upper end diameter places the diameter in hole greater than push rod, the said push rod setpoint distance that vertically can slide; Like this, patrix drives punching pin and moves downward when strip stretched, the moment that punching pin contacts with strip; Punching pin moves upward, extruding push rod compression elastic piece, and this has just played cushioning effect; When elastic component is compressed to a certain degree; After patrix and the counterdie closure, punching pin is patrix stop relatively just, realizes that strip stretches; It has avoided flushing to contact moment huge impact power with strip to the injury of punching pin, has protected punching pin.

As further improvement of the present invention, said elastic component is a spring.

As further improvement of the present invention, said push rod is a bolt, and bolt head is positioned at the elastic component locating hole.

The invention has the beneficial effects as follows: the present invention is through being provided with elastic component and push rod in the punching pin upper end; Realized that punching pin contacts the buffering of moment with strip; Punching pin has been played effective protective effect, and it can realize the stretching of pit accurately and rapidly, effectively avoids the damage of punching pin; Reduce the punching press expense, improved production efficiency and stamping quality.

Description of drawings

Fig. 1 is a structural principle sketch map of the present invention;

Fig. 2 is the existing structure principle schematic.

The specific embodiment

Embodiment: a kind of accurate stretching die, comprise upper bolster 1, train wheel bridge 2, upper padding plate 3, elastic component 4, push rod 5 and punching pin 6, said upper bolster 1, train wheel bridge 2 and upper padding plate 3 are connected from top to bottom successively; Be respectively equipped with coaxial elastic component 4 locating holes on upper bolster 1, train wheel bridge 2 and the upper padding plate 3, push rod 5 places hole and punching pin 6 locating holes, said elastic component 4 is inserted in elastic component 4 locating holes, elastic component 4 upper ends and upper bolster 1 are connected; Elastic component 4 lower ends are tight against push rod 5 upper ends, and push rod 5 is the T shape bar of upper end diameter greater than lower end diameter, and said push rod 5 upper ends are placed in elastic component 4 locating holes; Push rod 5 lower ends are placed in push rod 5 and place in the hole, and said push rod 5 places bore dia between push rod about in the of 5 between the diameter of two ends, and said push rod 5 lower ends stretch in punching pin 6 locating holes; And punching pin 6 upper ends of push rod 5 lower end backstops in being inserted in it, said punching pin 6 upper end diameter place the diameter in hole greater than push rod 5, said push rod 5 setpoint distance that vertically can slide; Like this, patrix drives punching pin 6 and moves downward when strip stretched, the moment that punching pin 6 contacts with strip; Punching pin 6 moves upward, extruding push rod 5 compression elastic pieces 4, and this has just played cushioning effect; When elastic component 4 is compressed to a certain degree; After patrix and the counterdie closure, just patrix stop relatively of punching pin 6 realizes that strip stretches; It has avoided flushing to contact moment huge impact power with strip to the injury of punching pin 6, has protected punching pin 6.

Said elastic component 4 is a spring.

Said push rod 5 is a bolt, and bolt head is positioned at elastic component 4 locating holes.

Claims

1. accurate stretching die, it is characterized in that: comprise upper bolster, train wheel bridge, upper padding plate, elastic component, push rod and punching pin, said upper bolster, train wheel bridge and upper padding plate are connected from top to bottom successively; Be respectively equipped with coaxial elastic component locating hole, push rod on upper bolster, train wheel bridge and the upper padding plate and place hole and punching pin locating hole; Said elastic component is inserted in the elastic component locating hole, and the elastic component upper end is connected with upper bolster, and the elastic component lower end is tight against the push rod upper end; Push rod is the T shape bar of upper end diameter greater than lower end diameter; Said push rod upper end is placed in the elastic component locating hole, and the push rod lower end is placed in push rod and places in the hole, and said push rod places bore dia between push rod up and down between the diameter of two ends; Said push rod lower end stretches in the punching pin locating hole; And the punching pin upper end of push rod lower end backstop in being inserted in it, said punching pin upper end diameter places the diameter in hole greater than push rod, the said push rod setpoint distance that vertically can slide.

2. accurate stretching die according to claim 1 is characterized in that: said elastic component is a spring.

3. accurate stretching die according to claim 1 is characterized in that: said push rod is a bolt, and bolt head is positioned at the elastic component locating hole.