CN217912482U

CN217912482U - Blanking and stretching composite die

Info

Publication number: CN217912482U
Application number: CN202222315633.4U
Authority: CN
Inventors: 唐海元; 刘英才; 王传鹏; 郑延吉; 赵晓飞; 毛爽军
Original assignee: Shenzhen Flyta Technology Development Co ltd
Current assignee: Shenzhen Flyta Technology Development Co ltd
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2022-11-29
Anticipated expiration: 2032-08-30

Abstract

A blanking and stretching composite die comprises an upper die and a lower die; the lower die comprises a lower die seat (9), a male die (16) fixedly arranged on the lower die seat (9), a stretching blank holder (6) slidably sleeved on the male die (16), a first spring (14) sleeved on the male die (16) and connected between the stretching blank holder (6) and the lower die seat (9), and a female die (7) sleeved on the stretching blank holder (6), accommodating the first spring (14) therein and used for limiting the stretching blank holder (6) on the male die (16); the upper die is detachably sleeved on the male die (16) and is used for being matched with the male die (16) to blank and draw the workpiece (15) into a cup shape. The utility model discloses a tensile compound mould of blanking utilizes the spring structure that deep-drawing blank holder below was add to effectively improve work piece fillet structure and the inhomogeneous phenomenon of marginal part deformation.

Description

Blanking and stretching composite die

Technical Field

The utility model relates to the field of machining, especially, relate to a tensile compound mould of blanking.

Background

The blanking deep drawing processing technology is a technology for changing a plane semi-finished part into a cup-shaped part through a die. In the process, the blank of the part is changed into a cup shape from a plane shape, the circumference of the outer edge of the part is greatly reduced, and if the thickness direction of the part is not limited, the material of the outer edge area of the part is wrinkled due to instability, so that the part cannot be machined finally.

The clamping force applied to the part is typically provided by a spring or rubber, and cannot be a constant value during the part drawing process. Whether the selection of the blank holder force reasonably and directly influences the selection of the deep drawing coefficient or not is judged, the blank holder force is increased, and the bending part of the part is thinned; when the blank pressing force exceeds a certain limit threshold, the part can fall off, namely the bottom of the cup-shaped part is cracked; the blank holder power is little, and the part outer fringe can remain the fold, and this problem has been the difficult problem of puzzlement deep-drawing processing always.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned technical problem, a tensile compound mould of blanking is proposed.

The utility model provides a following technical scheme:

the utility model provides a blanking stretching composite die, which comprises an upper die and a lower die;

the lower die comprises a lower die seat, a male die fixedly arranged on the lower die seat, a stretching blank holder slidably sleeved on the male die, a first spring sleeved on the male die and connected between the stretching blank holder and the lower die seat, and a female die sleeved on the stretching blank holder, accommodating the first spring and limiting the stretching blank holder on the male die;

the upper die is detachably sleeved on the male die and is used for being matched with the male die to perform blanking, stretching and processing on the workpiece into a cup shape.

The utility model discloses among the tensile compound mould of foretell blanking, go up the mould and include the upper die base, install the male and female mould on the upper die base and establish at the male and female mould bottom fixedly, be used for cooperating with male and female mould, terrace die in order to become cupped blanking blank holder with the tensile processing of work piece blanking.

In the blanking and stretching composite die of the utility model, the blanking blank holder and the male and female dies are enclosed into a die cavity; the die cavity is detachably sleeved on the male die and is used for being matched with the male die to enable the workpiece to be blanked and stretched into a cup shape.

In the blanking and stretching composite die of the utility model, the concave-convex die is axially provided with a first through hole; the upper die also comprises a die handle fixedly connected with the upper die base, and a second through hole communicated with the first through hole is formed in the axial direction of the die handle; the upper die also comprises a knockout rod which is arranged on the die handle, penetrates through the second through hole and is telescopically arranged in the first through hole, and a material pushing block which is fixedly arranged at the end part of the knockout rod and is used for pushing out a workpiece after blanking and stretching processing.

The utility model discloses among the tensile compound mould of foretell blanking, go up the mould and still establish the second spring on the knockout pole and connect between ejector pad and die shank including holding in first through-hole and cover.

The utility model discloses among the tensile compound mould of foretell blanking, go up the mould and still include the second bolt and the cover with blanking blank holder and upper die base fixed connection and establish the third spring on the second bolt and be connected between blanking blank holder and upper die base.

The utility model discloses among the tensile compound mould of foretell blanking, the lower mould still includes the bracing piece of axial fixity ground installation on the die holder, terrace die and bracing piece axial fixity are connected.

In the blanking and stretching composite die of the utility model, the lower die further comprises a first pressing ring arranged at the bottom of the support rod, an elastic pad arranged at the bottom of the first pressing ring and a second pressing ring arranged at the bottom of the elastic pad; the lower die further comprises a fifth bolt fixedly connecting the second pressing ring with the lower die base.

The utility model discloses among the tensile compound mould of foretell blanking, the third through-hole has been seted up on first pressure ring, and the fifth bolt is worn to locate in the third through-hole.

The utility model discloses an novelty of tensile compound mould of blanking lies in, has changed original deep-drawing mould design theory, utilizes the spring structure control clearance that deep-drawing blank holder below was add to suitable value, leads to the blank pressing power that control blanking deep-drawing in-process work piece received when restricting the deformation space of deep-drawing in-process material, effectively improves work piece fillet structure and marginal part and warp inhomogeneous phenomenon.

Drawings

The present invention will be further explained with reference to the accompanying drawings:

fig. 1 shows a schematic structural diagram of an upper die of a blanking-drawing composite die according to a preferred embodiment of the present invention;

fig. 2 shows a schematic structural diagram of a lower die of the blanking-stretching composite die according to the preferred embodiment of the present invention.

Detailed Description

In order to make the technical solutions, technical objects, and technical effects of the present invention clearer, so as to enable those skilled in the art to understand and implement the present invention, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-2, fig. 1 is a schematic structural diagram of an upper die of a blanking-drawing composite die according to a preferred embodiment of the present invention; fig. 2 shows a schematic structural diagram of a lower die of the blanking-drawing composite die according to the preferred embodiment of the present invention. The blanking and stretching composite die comprises an upper die and a lower die;

the lower die comprises a lower die seat 9, a male die 16 fixedly arranged on the lower die seat 9, a stretching blank holder 6 slidably sleeved on the male die 16, a first spring 14 sleeved on the male die 16 and connected between the stretching blank holder 6 and the lower die seat 9, and a female die 7 sleeved on the stretching blank holder 6, accommodating the first spring 14 and limiting the stretching blank holder 6 on the male die 16;

the upper die is detachably sleeved on the male die 16 and is used for matching with the male die 16 to perform blanking, stretching and processing on the workpiece 15 into a cup shape.

The technical scheme is a basic scheme, an upper die moves downwards, and the upper die and a male die 16 jointly act on a workpiece after blanking to realize drawing processing. The first spring 14 is used for adaptively adjusting the gap between the stretching blank holder 6 and the upper die by using the elasticity thereof, so that the edge pressing force is kept at a proper value, and the workpiece 15 can not fall off or be wrinkled at the outer edge.

Further, in this embodiment, the upper die includes an upper die base 3, a male and female die 5 mounted on the upper die base 3, and a blank holder 17 fixedly sleeved at the bottom of the male and female die 5 and used for cooperating with the male and female die 5, 16 to blank and stretch the workpiece 15 into a cup shape. Here, the blanking blank holder 17 and the male die 5 enclose a die cavity; the die cavity moves downwards and is detachably sleeved on the male die 16, so that the workpiece after blanking is under the combined action of the male die 16, the workpiece 15 is blanked and stretched into a cup shape, and drawing processing is realized. In this embodiment, the male and female dies 5 and the upper die base 3 are fixedly connected by the first bolts 4.

Further, in the present embodiment, the male and female dies 5 are axially provided with a first through hole; the upper die also comprises a die handle 1 fixedly connected with the upper die base 3, and a second through hole communicated with the first through hole is formed in the axial direction of the die handle 1; the upper die further comprises a material beating rod 22 which is arranged on the die shank 1, penetrates through the second through hole and is telescopically arranged in the first through hole, and a material pushing block 18 which is fixedly arranged at the end part of the material beating rod 22 and is used for pushing out the workpiece 15 after blanking and stretching processing. Here, the pusher block 18 and the end of the knock-out bar 22 are connected by a connecting pin, which may be a screw, a rivet, or the like, or by welding.

Further, the upper die also comprises a second spring 2 which is accommodated in the first through hole, sleeved on the knockout block 22 and connected between the material pushing block 18 and the die shank 1. The pusher block 18 is pushed against by the second spring 2.

Furthermore, the upper die further comprises a second bolt 19 for fixedly connecting the blanking blank holder 17 with the upper die holder 3, and a third spring 20 sleeved on the second bolt 19 and connected between the blanking blank holder 17 and the upper die holder 3.

Further, the die shank 1 is fixedly mounted on the upper die base 3 by a third bolt 21. The female die 7 is fixedly connected with the lower die holder 9 through a fourth bolt 8.

Further, the lower die further comprises a support rod 13 axially fixedly installed on the lower die base 9, and the male die 16 is axially fixedly connected with the support rod 13.

Further, the lower die further comprises a first pressing ring 10 padded at the bottom of the support rod 13, an elastic pad 11 arranged at the bottom of the first pressing ring 10, and a second pressing ring 23 arranged at the bottom of the elastic pad 11; the lower die further comprises a fifth bolt 12 for fixedly connecting the second pressing ring 23 with the lower die holder 9.

Further, a third through hole is formed in the first pressing ring 10, and the fifth bolt 12 penetrates through the third through hole.

In the blanking and stretching composite die of the utility model, the blanking blank holder 17 is connected with the upper die base 3 through the second bolt 19, and the workpiece is pressed tightly through the action of the second spring 2; the concave-convex die 5 is connected with the upper die base 3; the concave-convex die 5 moves downwards and cooperates with the convex die 16 to finish blanking processing; along with the deformation of the material in the drawing process, the workpiece applies variable pressure to the drawing blank holder, and the blank drawing is controlled by the first spring 14 to realize the self-adaptive change of blank holder force of the drawing blank holder reacting on the workpiece. The male die 16 is connected with the lower die holder, the female die 5 moves downwards, and the female die 5 and the male die 16 jointly act on a blanked workpiece to realize drawing processing. The material pushing block 18 is connected with the material beating rod, the material pushing block is pressed tightly against the workpiece under the pushing action of the second spring 2 in the drawing process, and the material beating rod acts downwards after the drawing process is finished, so that the material pushing block pushes the workpiece out of the concave-convex mold. The elastic pad 11 is arranged at the bottom of the support rod 13 and plays a role in absorbing energy in the stamping process.

The utility model discloses a tensile compound mould of blanking can be through adjusting second bolt 19 and the clearance (hereinafter for short the clearance) to the appropriate value between tensile blank holder 6 of first spring 14 control under tensile blank holder 6 and the unsmooth mould 5. With the downward movement of the concave-convex die 5, drawing begins, the workpiece is fed and deformed to generate a stacking trend, the workpiece is prevented from being stacked excessively by a gap, the deformation of the workpiece is limited within a gap allowable range, and when the workpiece generates extrusion force on the drawing blank holder 6, the drawing blank holder 6 generates blank holder force with equal size and opposite direction on the workpiece; along with the deep-drawing further goes on, walk the material and pile up the trend and aggravate, the work piece increases blank holder pressure, and first spring 14's deformation increases, and tensile blank holder 6 acts on the blank holder power grow thereupon of work piece, and the blank holder power is along with work piece deformation synchronization variation, and first spring 14 also can be along with the change of blank holder power deformation, and then the control work piece receives the size of blank holder power, realizes the self-adaptation adjustment demand to the blank holder power among the tensile process.

While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A blanking and stretching composite die is characterized by comprising an upper die and a lower die;

the lower die comprises a lower die seat (9), a male die (16) fixedly arranged on the lower die seat (9), a stretching blank holder (6) slidably sleeved on the male die (16), a first spring (14) sleeved on the male die (16) and connected between the stretching blank holder (6) and the lower die seat (9), and a female die (7) sleeved on the stretching blank holder (6), accommodating the first spring (14) therein and used for limiting the stretching blank holder (6) on the male die (16);

the upper die is detachably sleeved on the male die (16) and is used for being matched with the male die (16) to blank and draw the workpiece (15) into a cup shape.

2. The blanking-drawing composite die according to claim 1, wherein the upper die comprises an upper die base (3), a male die (5) mounted on the upper die base (3), and a blanking and blank holder (17) fixedly sleeved at the bottom of the male die (5) and used for cooperating with the male die (5) and the female die (16) to draw and draw the workpiece (15) into a cup shape.

3. The blanking-stretching composite die as claimed in claim 2, characterized in that the blanking blank holder (17) and the male and female die (5) enclose a die cavity; the die cavity is detachably sleeved on the male die (16) and is used for being matched with the male die (16) to blank and draw the workpiece (15) into a cup shape.

4. The blanking-stretching composite die as claimed in claim 2 or 3, wherein the male and female die (5) is axially provided with a first through hole; the upper die also comprises a die handle (1) fixedly connected with the upper die base (3), and a second through hole communicated with the first through hole is formed in the axial direction of the die handle (1); the upper die also comprises a knockout rod (22) which is arranged on the die handle (1), penetrates through the second through hole and is telescopically arranged in the first through hole, and a material pushing block (18) which is fixedly arranged at the end part of the knockout rod (22) and is used for pushing out a workpiece (15) after blanking and stretching processing.

5. The blanking-stretching composite die according to claim 4, wherein the upper die further comprises a second spring (2) received in the first through hole and sleeved on the knockout pin (22) and connected between the pusher block (18) and the die shank (1).

6. The blanking-stretching composite die according to claim 2 or 3, wherein the upper die further comprises a second bolt (19) fixedly connecting the blanking blank holder (17) with the upper die holder (3), and a third spring (20) sleeved on the second bolt (19) and connected between the blanking blank holder (17) and the upper die holder (3).

7. The blanking-stretching composite die as claimed in claim 2 or 3, wherein the lower die further comprises a support rod (13) axially fixedly mounted on the lower die holder (9), and the male die (16) is axially fixedly connected with the support rod (13).

8. The blanking and stretching compound die as claimed in claim 7, wherein the lower die further comprises a first pressing ring (10) padded at the bottom of the support rod (13), an elastic pad (11) padded at the bottom of the first pressing ring (10), and a second pressing ring (23) padded at the bottom of the elastic pad (11); the lower die also comprises a fifth bolt (12) which fixedly connects the second pressing ring (23) with the lower die holder (9).

9. The blanking and stretching composite die according to claim 8, wherein a third through hole is formed in the first pressing ring (10), and the fifth bolt (12) is inserted into the third through hole.