CN109108150B

CN109108150B - Small hole stamping die

Info

Publication number: CN109108150B
Application number: CN201811084862.1A
Authority: CN
Inventors: 陶老夯; 陶庭富
Original assignee: WUHU HANGFU MACHINERY MOLD CO Ltd
Current assignee: WUHU HANGFU MACHINERY MOLD CO Ltd
Priority date: 2018-09-18
Filing date: 2018-09-18
Publication date: 2020-07-21
Anticipated expiration: 2038-09-18
Also published as: CN109108150A

Abstract

The invention provides a small hole stamping die which comprises a male die fixing plate, wherein a male die fixing sleeve is fixed in the male die fixing plate, a punching male die is arranged in the male die fixing sleeve, a punch sheath is arranged at the end part of the punching male die, a discharging plate is arranged on the lower surface of the male die fixing plate, the discharging plate is connected with an upper die base through a movable bolt, a guide groove is formed in the discharging plate, the punch sheath is positioned in the guide groove, and the top of the punch sheath is connected with the male die fixing sleeve through a pushing spring; the stripper lower surface is equipped with the die, the die hole has been seted up on the die, the die spout has been seted up to the both sides in die hole, install the baffle in the die spout, the subassembly setting that bulldozes through of baffle is in the die spout, the resistance that receives when reducing the terrace die that punches a hole, prevent that the punching pin from taking place crooked rupture phenomenon, the life of the terrace die that prolongs punches a hole has improved work efficiency.

Description

Small hole stamping die

Technical Field

The invention relates to the technical field of dies, in particular to a small hole stamping die.

Background

With the rapid development of the modern stamping technology and the continuous expansion of the application range, the small holes are more and more widely processed by using the stamping die in the actual production. The outstanding characteristics of utilizing the mould production are that production efficiency is high, and product quality is stable, and its prerequisite is that the mould life-span must be high.

The invention discloses a cold stamping die with a small flanging hole of a sheet material, which is disclosed by the current application number of 201310063608.4 and is named as a small hole cold stamping die for a sheet material flanging, and the cold stamping die comprises a male die and a female die, wherein a male die punch structure comprises a large cylinder and a small cylinder, the small cylinder is positioned at the bottom of the large cylinder and is coaxial with the large cylinder, the female die is provided with a cylindrical hole cavity, the cylindrical hole cavity is coaxial with the male die punch, and the inner diameter of the cylindrical hole cavity is larger than the diameter of the large cylinder of the male. The die can effectively reduce the occurrence probability of inconsistent heights of the circular small hole flanging and the breakage or the defect of the small hole flanging during the small hole flanging processing.

The small cylinder of the device is a punch head, when a small hole is formed, the strength and the rigidity of a small cylindrical slender rod are poor, when a plate is blanked, the resistance is overlarge, the punch head is easy to bend and deform and break, when a blanked material is too thick, the slender punch head is easy to deviate, the punching precision is reduced, the service life of the punch head is reduced, and the production cost is increased.

Disclosure of Invention

The invention aims to provide a small-hole punching die, which aims to solve the problems that in the prior art, due to overlarge discharging force and overlarge plate thickness, a slender male die punch is easy to bend, deform and break or deviate, the punching precision is reduced, and the service life of a male die is shortened.

In order to solve the technical problems, the technical scheme of the invention is as follows: a small hole stamping die comprises an upper die base, wherein an upper base plate is connected to the lower surface of the upper die base, a male die fixing plate is connected to the lower surface of the upper base plate, a male die fixing sleeve is fixed in the male die fixing sleeve, a punching male die is arranged in the male die fixing sleeve, a punch sheath is arranged at the end part of the punching male die, a discharging plate is arranged on the lower surface of the male die fixing plate and connected with the upper die base through a movable bolt, a guide groove is formed in the discharging plate, the punch sheath is located in the guide groove, and the top of the punch sheath is connected with the male die fixing sleeve through a hydraulic telescopic rod; a female die is arranged below the stripper plate, a female die hole is formed in the female die, female die sliding grooves are formed in two sides of the female die hole, a baffle is arranged in each female die sliding groove, one side of the baffle is connected to one side of each female die sliding groove through a baffle pressure spring, the other side of the baffle is arranged in each female die sliding groove through a pushing assembly, a plate on the female die is positioned and locked through the baffle, and the punching male die performs punching operation on the plate;

the upper backing plate and the punch fixing plate are fixed on the upper die base through bolts, guide sleeves are fixed on two sides of the upper die base, guide pillars are inserted in the guide sleeves, the bottom ends of the guide pillars are connected with a lower die base, a lower backing plate is arranged on the upper surface of the lower die base, a female die is arranged on the upper surface of the lower backing plate, the female die and the lower backing plate are fixedly connected with the lower die base through bolts, a strong spring is sleeved on the movable bolt, one end of the strong spring is connected with the upper surface of the discharging plate, and the other end of the strong spring is arranged in the punch fixing plate;

the punch fixing sleeve is in a cylindrical step shape, the top end of the punch fixing sleeve is located at the top of the punch fixing plate, the bottom end of the punch fixing sleeve penetrates through the bottom of the punch fixing plate, a step round table is arranged at the bottom end of the punch fixing sleeve and externally connected with a pushing spring, the bottom end of the pushing spring is in surface contact with the upper end of the punch sheath, a hydraulic telescopic rod is inserted into the pushing spring, the upper end of the hydraulic telescopic rod is fixedly connected with the punch fixing sleeve, the bottom end of the hydraulic telescopic rod is fixedly connected with the punch sheath, the punching punch is inserted into the punch fixing sleeve, and the diameter of the bottom end surface of the punch sheath is smaller than that of the step round;

the punching male die comprises an upper punch, the upper punch is T-shaped, the bottom end of the upper punch is positioned in the stepped circular table, a rubber pad is arranged in the stepped circular table, a punch is fixed at the bottom end of the upper punch and penetrates through the bottom end of the stepped circular table to be inserted into a punch sheath;

the bottom ends of two sides of the discharging plate are fixedly provided with two groups of guide inclined blocks, the pushing assemblies are symmetrically arranged in the die chute, each pushing assembly comprises a pushing inclined block, the pushing inclined blocks are arranged in the die chute, the end parts of the pushing inclined blocks are fixedly connected with pushing rods, the end parts of the pushing rods penetrate through the supporting blocks and are connected with jacking blocks, reset springs are sleeved on the pushing rods, one ends of the reset springs are in contact with the pushing inclined blocks, the other ends of the reset springs are in contact with the side faces of the supporting blocks, and the jacking blocks are in contact with the baffle;

the baffle is L-shaped, the bent part at the upper end of the baffle is clamped with the plate, and the bottom end of the baffle is inserted in the guide groove in a sliding manner through the protruding block;

the outer side surfaces of the two guide inclined blocks are in inserted fit with the side surfaces of two end parts of the female die sliding groove, and the inner inclined surfaces of the two guide inclined blocks are in relative sliding fit with the outer inclined plane of the pushing inclined block.

Compared with the prior art, the invention has the beneficial effects that: the punching male die is arranged into two parts, the T-shaped punch at the upper end is arranged on the male die fixing plate through the male die fixing sleeve, one part of the punch at the lower end is positioned in the male die fixing sleeve, the male die fixing sleeve not only can play a role of guiding the punching male die and reduce the resistance force when the punching male die punches and prevent the punch from being bent and broken, but also the bottom end of the male die fixing sleeve is connected with the punch sheath through an external pushing spring, the punch sheath is inserted in the guide groove, the end part of the punch is positioned in the punch sheath, the punch sheath can further improve the protection of the punch and prevent the end part of the punch from being bent, the diameter of the bottom end of the punch sheath is smaller, the contact area with the plate is further reduced, the pressure of the pushing spring is transmitted to the material, the pressure on the periphery of the plate needing to be punched is further increased, and the punch is, the punching die has the advantages that punching precision is more accurate, the baffle in the die sliding groove is arranged, the positioning and clamping effect can be performed on the plate through the pushing and pressing assembly, the plate is prevented from being deviated or moved during punching operation, the transverse force of the punch during punching operation is reduced, the phenomenon of bending deformation of the punch is reduced, the service life of the punching male die is prolonged, and working efficiency is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is a partial enlarged view of structure A of the present invention;

FIG. 4 is a schematic view of the engagement of the pushing assembly with the shutter according to the present invention;

FIG. 5 is a top view of the female mold of the present invention;

fig. 6 is a schematic view of the matching structure of the punch fixing sleeve and the punching punch of the invention.

Description of reference numerals:

1-upper die holder, 2-upper backing plate, 3-punch holder, 4-strong spring, 5-stripper, 5 a-guide groove, 6-punch sheath, 7-pushing assembly, 71-pushing inclined block, 72-return spring, 73-pushing rod, 74-supporting block, 75-pushing block, 76-guide groove, 8-die, 8 a-die chute, 8 b-blanking punch, 9-lower backing plate, 10-lower die holder, 11-blanking groove, 12-guide inclined block, 13-guide post, 14-guide sleeve, 15-movable bolt, 16-punch holder, 16 b-stepped circular table, 16 a-rubber pad, 17-punch, 17 a-upper punch, 17 b-punch, 18-a pushing spring, 19-a plate, 20-a baffle, 20 a-a bump, 21-a baffle pressure spring and 22-a hydraulic telescopic rod.

Detailed Description

Reference will now be made in detail to various exemplary embodiments of the invention, the detailed description should not be construed as limiting the invention but as a more detailed description of certain aspects, features and embodiments of the invention.

It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The specification and examples are exemplary only.

Referring to the attached drawings 1-6, the invention provides a small hole stamping die, which comprises an upper die holder 1, wherein the lower surface of the upper die holder 1 is connected with an upper base plate 2, the lower surface of the upper base plate 2 is connected with a male die fixing plate 3, a male die fixing sleeve 16 is fixed in the male die fixing plate 3, a punching male die 17 is arranged in the male die fixing sleeve 16, the end part of the punching male die 17 is provided with a punch sheath 6, the lower surface of the male die fixing plate 3 is provided with a discharging plate 5, the discharging plate 5 is connected with the upper die holder 1 through a movable bolt 15, the discharging plate 5 is provided with a guide groove 5a, the punch sheath 6 is positioned in the guide groove 5a, and the top of the punch sheath 6 is connected with the male die fixing sleeve 16; the stripper 5 below is equipped with die 8, die hole 8b has been seted up on die 8, die spout 8a has been seted up to die hole 8 b's both sides, install baffle 20 in the die spout 8a, baffle 20 one side is connected through baffle pressure spring 21 one side of die spout 8a, the opposite side of baffle 20 is in through bulldozing subassembly 7 setting in the die spout 8a, panel 19 on the die 8 is through baffle 20 location locking, the terrace die 17 that punches a hole to panel 19 operation of punching a hole.

In this embodiment, referring to fig. 1 and 2, the upper pad 2 and the punch plate 3 are both fixed on the upper die holder 1 by bolts, guide sleeves 14 are fixed on both sides of the upper die holder 10, guide pillars 13 are inserted into the guide sleeves 14, a lower die holder 10 is connected to the bottom ends of the guide pillars, a lower pad 9 is arranged on the upper surface of the lower die holder 10, a female die 8 is arranged on the upper surface of the lower pad 9, the female die 8 and the lower pad 9 are fixedly connected to the lower die holder 10 by bolts, a strong spring 4 is sleeved on the movable bolt 15, one end of the strong spring 4 is connected to the upper surface of the discharging plate 5, and the other end of the strong spring is arranged in the punch plate 3.

In this embodiment, referring to fig. 2, 3 and 6, the punch fixing sleeve 16 is cylindrical and stepped, the top end of the punch fixing sleeve 16 is located at the top of the punch fixing plate 3, the bottom end of the punch fixing sleeve passes through the bottom of the punch fixing plate 3, a stepped circular truncated cone 16b is arranged at the bottom end of the punch fixing sleeve 16, a pushing spring 18 is externally connected to the stepped circular truncated cone 16b, the bottom end of the pushing spring 18 is in contact with the upper end surface of the punch sheath 6, a hydraulic telescopic rod 22 is inserted into the pushing spring 18, the upper end of the hydraulic telescopic rod 22 is fixedly connected to the punch fixing sleeve 16, the bottom end of the hydraulic telescopic rod is fixedly connected to the punch sheath 6, the punching punch 17 is inserted into the punch fixing sleeve 16, the diameter of the bottom end surface of the punch sheath 6 is smaller than that of the stepped circular truncated cone 16b, and the punch fixing sleeve 16 is set to be stepped, the punch has a guiding function on the punching male die 17, and simultaneously, the strength and the rigidity of the upper punch 17a and the punch 17b are improved, so that the punch is prevented from being bent and broken.

In this embodiment, referring to fig. 2, 3 and 6, the punching male die 17 includes an upper punch 17a, the upper punch 17a is T-shaped, the bottom end of the upper punch 17a is located in the stepped circular truncated cone 16b, a rubber pad 16a is arranged in the stepped circular truncated cone 16b, a punch 17b is fixed at the bottom end of the upper punch 17a, the punch 17b passes through the bottom end of the stepped circular truncated cone 16b and is inserted into the punch sheath 6, and the upper portion of the punching male die 17 is the T-shaped upper punch 17a, so that the punch sheath 16 is convenient to mount and dismount, and the overall strength of the punching male die 17 is improved.

In this embodiment, referring to fig. 2, 4 and 5, the bottom ends of the two sides of the discharging plate 5 are fixed with guide sloping blocks 12, the pushing assemblies 7 are two groups, and are symmetrically arranged in the die slide grooves 8a, the pushing assembly 7 comprises a pushing inclined block 71, the pushing inclined block 71 is arranged in the die chute 8a, the end part of the pushing inclined block 71 is fixedly connected with a pushing rod 73, the end of the push rod 73 passes through the supporting block 74 and is connected with a jacking block 75, the push rod 73 is sleeved with a return spring 72, one end of the return spring 72 is in contact with the push ramp 71, and the other end is in contact with the side surface of the supporting block 74, the jacking block 75 is in contact with the baffle 20, the outer side surfaces of the two guide inclined blocks 12 are in insertion fit with the side surfaces of two end parts of the female die chute 8a, and the inner inclined surfaces of the two guide inclined blocks 12 are in relative sliding fit with the outer inclined surfaces of the pushing inclined blocks 71;

the guide inclined block 12 moves downwards under the driving of the discharging plate 5, the outer side surface of the guide inclined block 12 contacts with two side surfaces of the female die chute 8a to play a guiding role, after the inner inclined surface of the guide inclined block 12 contacts with the pushing inclined block 71, the guide inclined block 12 continues to move downwards to extrude the pushing inclined block 71, the pushing inclined block 71 horizontally pushes the pushing rod 73 to move horizontally, the reset spring 71 sleeved on the pushing rod 73 generates pressure deformation, the jacking block 75 at the end part of the pushing rod 73 horizontally pushes the baffle 20, the baffle 20 moves in the guide groove 76 through the bottom raised block 20a, the baffle pressure spring 21 arranged at the side surface of the baffle 20 generates pressure deformation, two groups of pushing and pressing assemblies 7 arranged in the female die chute 8a are driven by the guide inclined block 12 to move oppositely to position and lock the plate 19 arranged on the baffle 20, and the plate 19 is prevented from shifting or moving, when the guide sloping block 12 is pressed down to the maximum stroke, the size of the gap between the two baffles 20 and the two sides of the plate 19 is ignored, and the plate 19 is prevented from being extruded and deformed by the baffles 20.

In this embodiment, referring to fig. 4, the baffle 20 is L-shaped, the bent portion of the upper end of the baffle 20 is clamped with the plate 19, the bottom end of the baffle 20 is slidably inserted into the guide groove 76 through the protrusion block 21, the baffle 20 is L-shaped, not only can a plurality of plates be positioned and locked, but also can be clamped with the plates to prevent the plates from jumping up when the punch finishes punching and then discharges the materials, which affects the service life of the die, and the protrusion block 21 arranged at the bottom end is matched with the guide groove 76 to prevent the baffle 20 from tilting when the die chute 8a slides.

According to the working principle of the invention, a sheet 19 is placed on a female die 8, an upper die holder 1 moves downwards to drive a discharging plate 5 to move downwards, a guide inclined block 12 on the discharging plate 5 is inserted into a female die sliding groove 8a, a baffle 20 is pushed by a pushing inclined block 71 through a locking block 75, the baffle 20 is contacted with the side surface of the sheet 19, the baffles 20 on two sides of the sheet 19 position and lock the sheet along with the downward movement of the guide inclined block 12, a strong spring 4 on the upper surface of the discharging plate 5 compresses the sheet, a punch sheath 6 arranged in the guide groove 5a is contacted with the sheet 19 firstly, a push spring 18 connected with the upper end of the punch sheath 6 generates strong pressure along with the downward movement of a punch fixing sleeve 16, so that the pressure on the periphery of the sheet 10 to be punched is further increased, the punch fixing plate 3 drives a punching punch 17 in the punch fixing sleeve 16 to move downwards, and a punch 17b is punched, the waste material that dashes down falls from blanking groove 11, and here punches a hole and accomplishes the back, and upper die base 1 return, stripper 5 drive the oblique piece 12 upward movement of direction, promote the oblique piece 71 return under reset spring 72's effort, baffle 20 is under the effort of baffle pressure spring 21, along guide groove 76 horizontal slip, returns the primary importance, and the position of waiting to punch a hole is moved next to panel 19, repeats the operation of punching a hole of above-mentioned theory of operation.

To sum up, the punching male die has the advantages that the punching male die is arranged into two parts, the T-shaped punch at the upper end is arranged on the male die fixing plate through the male die fixing sleeve, one part of the punch at the lower end is positioned in the male die fixing sleeve, the male die fixing sleeve not only can play a role of guiding the punching male die to reduce resistance force applied during punching of the punching male die and prevent the punch from bending and breaking, meanwhile, the bottom end of the male die fixing sleeve is connected with the punch sheath through an external pushing spring, the punch sheath is inserted in the guide groove, the end part of the punch is positioned in the punch sheath, the punch sheath can further improve protection on the punch and prevent the end part of the punch from bending, as the diameter of the bottom end of the punch sheath is smaller, the contact area with the plate is further reduced, the pressure of the pushing spring is transmitted to the material, and the pressure applied to the periphery of the plate needing punching is, the punch is prevented from deviating, so that the punching precision is more accurate, meanwhile, the baffle arranged in the female die chute can perform positioning and clamping action on the plate through the pushing and pressing assembly, the plate is prevented from deviating or moving during punching operation, the transverse force of the punch during punching operation is reduced, the bending deformation of the punch is reduced, the service life of the punching male die is prolonged, and the working efficiency is improved; the baffle plate is arranged into a shape, so that not only can a plurality of plates be positioned and locked, but also the plates can be clamped, and the phenomenon that the plates jump up when the punch punches a hole and then unloads the materials is avoided, so that the service life of the die is influenced; the protruding block arranged at the bottom end is matched with the guide groove, so that the baffle is prevented from inclining when the concave die sliding groove slides.

The foregoing is merely an illustrative embodiment of the present invention, and any equivalent changes and modifications made by those skilled in the art without departing from the spirit and principle of the present invention should fall within the protection scope of the present invention.

Claims

1. The utility model provides a small hole stamping die, includes upper die base (1), upper die base (1) lower surface is connected with upper padding plate (2), the lower surface of upper padding plate (2) is connected with punch plate (3), its characterized in that: a punch fixing sleeve (16) is fixed in the punch fixing sleeve (3), a punching punch (17) is arranged in the punch fixing sleeve (16), a punch sheath (6) is arranged at the end part of the punching punch (17), a stripper (5) is arranged on the lower surface of the punch fixing sleeve (3), the stripper (5) is connected with the upper die base (1) through a movable bolt (15), a guide groove (5 a) is formed in the stripper (5), the punch sheath (6) is positioned in the guide groove (5 a), and the top of the punch sheath (6) is connected with the punch fixing sleeve (16) through a hydraulic telescopic rod (22); a female die (8) is arranged below the stripper plate (5), a female die hole (8 b) is formed in the female die (8), female die sliding grooves (8 a) are formed in two sides of the female die hole (8 b), a baffle (20) is installed in each female die sliding groove (8 a), one side of the baffle (20) is connected to one side of each female die sliding groove (8 a) through a baffle pressure spring (21), the other side of the baffle (20) is arranged in each female die sliding groove (8 a) through a pushing and pressing assembly (7), a plate (19) on the female die (8) is positioned and locked through the baffle (20), and the punching male die (17) performs punching operation on the plate (19);

the upper backing plate (2) and the punch plate (3) are fixed on the upper die base (1) through bolts, guide sleeves (14) are fixed on two sides of the upper die base (10), guide pillars (13) are inserted in the guide sleeves (14), the bottom ends of the guide pillars are connected with a lower die base (10), a lower backing plate (9) is arranged on the upper surface of the lower die base (10), the female die (8) is arranged on the upper surface of the lower backing plate (9), the female die (8) and the lower backing plate (9) are fixedly connected with the lower die base (10) through bolts, the movable bolt (15) is sleeved with a strong spring (4), one end of the strong spring (4) is connected with the upper surface of the discharging plate (5), and the other end of the strong spring is arranged in the punch plate (3);

the male die fixing sleeve (16) is in a cylindrical step shape, the top end of the male die fixing sleeve (16) is positioned at the top of the male die fixing plate (3), the bottom end of the male die fixing sleeve passes through the bottom of the male die fixing plate (3), the bottom end of the punch fixing sleeve (16) is provided with a step round table (16 b), the step round table (16 b) is externally connected with a push spring (18), the bottom end part of the push spring (18) is contacted with the upper end surface of the punch sheath (6), a hydraulic telescopic rod (22) is inserted in the pushing spring (18), the upper end of the hydraulic telescopic rod (22) is fixedly connected with the male die fixing sleeve (16), the bottom end of the hydraulic telescopic rod is fixedly connected with the punch sheath (6), the punching male die (17) is inserted into the male die fixing sleeve (16), and the diameter of the bottom end face of the punch sheath (6) is smaller than that of the bottom end face of the stepped circular truncated cone (16 b);

the punching male die (17) comprises an upper punch (17 a), the upper punch (17 a) is T-shaped, the bottom end of the upper punch (17 a) is located in the stepped circular table (16 b), a rubber pad (16 a) is arranged in the stepped circular table (16 b), a punch (17 b) is fixed at the bottom end of the upper punch (17 a), and the punch (17 b) penetrates through the bottom end of the stepped circular table (16 b) and is inserted into the punch sheath (6);

the bottom ends of two sides of the discharging plate (5) are fixedly provided with guide inclined blocks (12), the pushing and pressing assemblies (7) are two groups and are symmetrically arranged in the die sliding groove (8 a), each pushing and pressing assembly (7) comprises a pushing inclined block (71), each pushing inclined block (71) is arranged in the die sliding groove (8 a), the end part of each pushing inclined block (71) is fixedly connected with a pushing rod (73), the end part of each pushing rod (73) penetrates through a supporting block (74) to be connected with a puller block (75), each pushing rod (73) is sleeved with a return spring (72), one end of each return spring (72) is in contact with each pushing inclined block (71), the other end of each return spring is in contact with the side surface of the supporting block (74), and each puller block (75) is in contact with the baffle (20);

the baffle (20) is L-shaped, the bent part of the upper end of the baffle (20) is clamped with the plate (19), and the bottom end of the baffle (20) is inserted into the guide groove (76) in a sliding manner through the protruding block (21);

the outer side surfaces of the two guide inclined blocks (12) are in plug fit with the side surfaces at two end parts of the female die sliding groove (8 a), and the inner inclined surfaces of the two guide inclined blocks (12) are in relative sliding fit with the outer inclined cutting surfaces of the pushing inclined blocks (71).