CN221289068U - Back extrusion die and 2500t back extrusion equipment - Google Patents

Abstract

The utility model discloses a back extrusion die and 2500t back extrusion equipment, wherein the back extrusion die comprises a die body, a die pad and a fastener, and a die cavity is arranged in the middle of the die body; the periphery of one end face of the die pad is provided with a spigot, the periphery of one end face of the die body is provided with an axial step clamped with the spigot, and the spigot and the axial step are annular; the die pad is provided with a connecting hole in a penetrating mode, a threaded hole is formed in the end face of one end of the die body, the end face of the die body, which is provided with an axial step, is provided with a threaded hole in a threaded mode, after penetrating through the connecting hole, a fastener is connected with the threaded hole in a threaded mode, one end, which is far away from the threaded hole, of the fastener is sunk into the connecting hole, a limiting portion is arranged in the connecting hole, and after the fastener is matched and connected with the threaded hole, the fastener can be connected with the limiting portion in a clamping mode. According to the back extrusion die provided by the utility model, through the arrangement of the fastening piece, the connection hole and the threaded hole are matched, and the die body and the die pad can be disassembled and assembled only by rotating the fastening piece, so that the die pad and the die body are convenient to disassemble and assemble, and the replacement efficiency of the die body is higher.

Description

Back extrusion die and 2500t back extrusion equipment

Technical Field

The utility model relates to the field of back extrusion equipment, in particular to a back extrusion die and 2500t back extrusion equipment.

Background

In 2500t back extrusion die, generally, the movable die core and the die sleeve are adopted, and the die cores are only replaced in different specifications, so that the cost is reduced, however, before the movable die is produced, the die sleeve is required to be heated, the movable die core is installed in an interference fit mode, when the specification is required to be replaced, the whole die is required to be heated, the movable die core is locally cooled, the movable die core is allowed to withdraw from the die sleeve, then the die sleeve is required to be heated, the movable die core with a new specification is installed in the die sleeve, the interference is small, the die extrusion is required to withdraw, the interference is large, the die cannot be withdrawn in replacement, special personnel and special equipment are required to replace, and quick production cannot be realized. Therefore, in the prior art, an integral die is often adopted, compared with a movable die, the integral die has high strength and stable structure, however, because each specification of the integral die needs to correspond to one set of die, the cost is high, the appearance and the thickness of the integral die are large, the die material is more increased, the processing difficulty is increased, and the processing period is prolonged.

Therefore, how to reduce the manufacturing cost of the back extrusion die is a technical problem that needs to be solved by those skilled in the art.

Disclosure of utility model

The utility model aims to provide a back extrusion die and 2500t back extrusion equipment, which can effectively reduce the processing cost of the die and have wider application range.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the back extrusion die comprises a die body, a die pad and a fastener, wherein a die cavity is formed in the middle of the die body; a spigot is arranged on the periphery of one end face of the die pad, an axial step clamped with the spigot is arranged on the periphery of one end face of the die body, the spigot and the axial step are annular, and a gap is reserved between the spigot and the axial step; the die pad is provided with a connecting hole in a penetrating mode, a threaded hole is formed in the end face of one end, provided with an axial step, of the die body, the fastener penetrates through the connecting hole and then is in threaded connection with the threaded hole, one end, away from the threaded hole, of the fastener sinks into the connecting hole, a limiting portion is arranged in the connecting hole, and after the fastener is matched and connected with the threaded hole, the fastener can be clamped with the limiting portion.

Preferably, the die cushion further comprises a positioning pin, a first positioning hole is arranged on the end surface of the die cushion provided with the spigot, the die body is provided with a second positioning hole on the end face of the axial step, and two ends of the positioning pin are respectively connected with the first positioning hole and the second positioning hole.

Preferably, the fastener is a bolt, the limiting part is an axial step surface arranged in the connecting hole, and the bolt head of the bolt can be clamped with the axial step surface.

Preferably, the fastener is an M20 bolt.

Preferably, the gap between the spigot and the axial step is 0.1-0.2mm.

Preferably, the thickness of the die body along the axial direction of the die body is 0.6-0.7 times of the thickness of the die pad along the axial direction of the die body.

Preferably, the thickness of the die body along the axial direction is 60-70mm, and the thickness of the die pad along the axial direction is 90-100mm.

Preferably, the height of the spigot along the axial direction of the die pad is 4-5mm, and the width along the radial direction of the die pad is 8-12mm.

Preferably, a circumferential step is arranged in the circumferential direction of the die body, the circumferential step is located at one side of the die body away from the axial step, and a chamfer is arranged at one side of the circumferential step, which is close to the axial step.

The utility model also provides 2500t back extrusion equipment, which comprises the back extrusion die.

The back extrusion die comprises a die body, a die pad and a fastener, wherein a die cavity is formed in the middle of the die body; a spigot is arranged on the periphery of one end face of the die pad, an axial step clamped with the spigot is arranged on the periphery of one end face of the die body, and the spigot and the axial step are annular; the die pad is provided with a connecting hole in a penetrating mode, a threaded hole is formed in the end face of one end, provided with an axial step, of the die body, the fastener penetrates through the connecting hole and then is in threaded connection with the threaded hole, one end, away from the threaded hole, of the fastener sinks into the connecting hole, a limiting portion is arranged in the connecting hole, and after the fastener is matched and connected with the threaded hole, the fastener can be clamped with the limiting portion. According to the back extrusion die provided by the utility model, through the arrangement of the fastening piece, the connection hole and the threaded hole are matched, the die body and the die pad can be disassembled and assembled only by rotating the fastening piece, and the gap is arranged between the spigot and the axial step, so that interference fit between the spigot and the axial step is avoided, the die pad and the die body are disassembled and assembled more conveniently, and the die body is more convenient to replace.

The 2500t back extrusion equipment provided by the utility model is provided with the back extrusion die, and the back extrusion die has the technical effects, so the 2500t back extrusion equipment provided with the back extrusion die also has the corresponding technical effects.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a structure of a back extrusion die according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of a die core in the back extrusion die shown in FIG. 1;

Wherein: a die body 1; a threaded hole 11; an axial step 12; a circumferential step 13; a die pad 2; a connection hole 21; a spigot 22; a limiting portion 23; a positioning pin 3; and a fastener 4.

Detailed Description

The core of the utility model is to provide a back extrusion die and 2500t back extrusion equipment, which can reduce the manufacturing cost and the processing period and improve the application range.

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of a back extrusion die according to an embodiment of the present utility model; fig. 2 is a schematic structural view of a die core in the back extrusion die shown in fig. 1.

In this embodiment, the back extrusion die comprises a die body 1, a die pad 2 and a fastener 4, wherein a die cavity is arranged in the middle of the die body 1; a spigot 22 is arranged on the periphery of one end face of the die pad 2, an axial step 12 clamped with the spigot 22 is arranged on the periphery of one end face of the die body 1, and the spigot 22 and the axial step 12 are annular; the die pad 2 is provided with a connecting hole 21 in a penetrating mode, the end face of one end of the die body 1, which is provided with an axial step 12, is provided with a threaded hole 11, a fastener 4 penetrates through the connecting hole 21 and then is in threaded connection with the threaded hole 11, one end, far away from the threaded hole 11, of the fastener 4 is sunk into the connecting hole 21, a limiting part 23 is arranged in the connecting hole 21, and after being matched and connected with the threaded hole 11, the fastener 4 can be clamped with the limiting part 23.

Specifically, the clearance between the spigot 22 and the axial step 12 refers to the clearance between the spigot 22 and the axial step 12 in the radial direction of the die pad 2 or the die body 1; after penetrating through the connecting hole 21 through the fastener 4, the die is connected with the threaded hole 11, one end of the fastener 4 is clamped with the limiting part 23, and the other end of the fastener is matched and connected with the threaded hole 11, so that the die body 1 and the die pad 2 are fixedly connected; meanwhile, the fastening piece 4 extends into the connecting hole 21, specifically, the end part of the fastening piece 4 can be sunk into the connecting hole 21, or the end part of the fastening piece 4 is flush with the end part of the connecting hole 21, so that the influence of the fastening piece 4 on the structure of the die cushion 2 is avoided. When the die pad 2 and the die body 1 are required to be disassembled and assembled, the fastener 4 is only required to be screwed by a tool; the end of the fastener 4 is preferably flush with the end of the attachment hole 21 to facilitate attachment of the tool to the fastener 4.

According to the back extrusion die provided by the utility model, through the arrangement of the fastening piece 4, the connection hole 21 and the threaded hole 11 are matched, the die body 1 and the die pad 2 can be disassembled and assembled only by rotating the fastening piece 4, and the gap is arranged between the spigot 22 and the axial step 12, so that interference fit between the spigot 22 and the axial step 12 is avoided, the die pad 2 and the die body 1 are disassembled and assembled more conveniently, the replacement efficiency of the die body 1 is higher, and the use is more convenient.

In some embodiments, the die cushion further comprises a locating pin 3, a first locating hole is arranged on the end surface of the die cushion 2 provided with the spigot 22, the end face of the die body 1 provided with the axial step 12 is provided with a second positioning hole, and two ends of the positioning pin 3 are respectively connected with the first positioning hole and the second positioning hole. Specifically, the number of the positioning pins 3 is preferably at least two, and the positioning of the die body 1 and the die pad 2 can be facilitated through the arrangement of the positioning pins 3, so that the die body 1 is prevented from rotating in use, the assembly and the disassembly are simple and convenient, and the installation efficiency is improved; the apertures of the first positioning hole and the second positioning hole can be consistent, and the processing and the installation of the positioning pin 3 are convenient.

In some embodiments, the fastener 4 is a bolt, and the limiting portion 23 is an axial stepped surface provided in the connection hole 21, and a bolt head of the bolt can be engaged with the axial stepped surface. Specifically, by providing the axial step surface in the connecting hole 21, that is, the diameter of the end, close to the spigot 22, in the connecting hole 21 is smaller than the diameter of the end, far away from the spigot 22, of the connecting hole 21, an axial step surface is formed in the connecting hole 21, and the axial step surface plays a limiting role in facing the fastener 4, so that the fastener 4 is convenient to tighten the die body 1 and the die pad 2.

In some embodiments, the fastener 4 is an M20 bolt, and the strength is high by adopting the M20 bolt, so that the die body 1 and the die pad 2 are firmly connected and are not easy to break.

In some embodiments, the clearance between the spigot 22 and the axial step 12 is 0.1-0.2mm. Specifically, by setting an assembly gap of 0.1-0.2mm, the die pad 2 and the die body 1 can be conveniently disassembled and assembled, and the replacement efficiency of the die body 1 is improved; the gap is not easy to be too large, so that the positioning efficiency of the die body 1 is low, and the gap is not too small, so that the die body 1 is inconvenient to assemble and disassemble.

In some embodiments, the thickness of the die body 1 in its axial direction is 0.6-0.7 times the thickness of the die pad 2 in its axial direction. Specifically, through the split of mould body 1 and die cushion 2, can effectively reduce the thickness of mould body 1, reduce processing cost, same die cushion 2 can correspond a plurality of mould bodies 1 that have different die cavities.

Preferably, the thickness of the die body 1 in the axial direction thereof is 60-70mm, the thickness of the die pad 2 in the axial direction thereof is 90-100mm, the die pad 2 can be used commonly, and the strength of the die pad 2 should be sufficient to support and fix the die body 1.

In some embodiments, the height of the spigot 22 along the axial direction of the die pad 2 is 4-5mm, and the width along the radial direction of the die pad 2 is 8-12mm, so that the limit of the spigot 22 on the axial step 12 on the die body 1 can be met, and the limit of the disassembly and assembly of the die body 1 due to the structure of the spigot 22 can be reduced.

In some embodiments, the circumferential direction of the die body 1 is provided with a circumferential step 13, the circumferential step 13 being located on the side of the die body 1 remote from the axial step 12, and the side of the circumferential step 13 close to the axial step 12 being provided with a chamfer. Specifically, the circumferential step 13 is arranged in the circumferential direction of the die body 1, and the diameter of the inlet end of the die body 1 is increased by the circumferential step 13, so that the strength of the inlet end of the die body 1 is higher, and the stability of the die body 1 in use is ensured; the chamfer is arranged on one side of the circumferential step 13, which is close to the axial step 12, so that stress concentration is avoided, and balanced stress is ensured.

It should be noted that, when designing the mold cavity, the pre-deformation amount needs to be considered, the pre-deformation amount is selected appropriately according to the size and shape of the section bar and extrusion experience, and then the pre-deformation amount is gradually adjusted after mold test to form a relatively perfect design scheme.

In a specific embodiment, the back extrusion die is split into two parts, namely a die body 1 and a die pad 2, and the split die body 1 is easy to replace in production and easy to process; the die body 1 and the die pad 2 are connected by two M12 or M20 bolts, two positioning pins 3 with the diameter of 12mm and a spigot 22 are positioned, the clearance between the axial step 12 of the die body 1 and the spigot 22 of the die pad 2 is 0.1-0.2mm, the disassembly and the assembly are convenient, the die body 1 can be replaced by loosening the bolts by adopting an inner hexagonal wrench, and the die body 1 with the required specification can be replaced; the die pad 2 is provided with a process hole, so that the die pad is convenient to fix on the back extrusion equipment. Compared with a movable die in the prior art, the back extrusion die does not need special equipment or special personnel to replace, and the back extrusion die is split into the die body 1 and the die pad 2, so that the thickness of the die body 1 is thinned, the processing procedure is simplified, and the same die pad 2 can meet the die body 1 with at least three specifications; particularly, the die pad 2 of the rod die and the tube die can be manufactured at intervals of 20-30mm, and the back extrusion die is arranged separately, so that the processing amount is reduced, the processing period is shortened, and the processing cost is effectively reduced. Meanwhile, since the die body 1 is a vulnerable part, the die pad 2 is generally not easy to break, and therefore, only the die body 1, particularly the die pad 2 of the rod die and the pipe die, can be processed in the later stage, and the die pad 2 can be not processed except for the damage or the new addition of the die pad 2.

Therefore, the back extrusion die is optimized from the aspect of design structure, and no additional investment is needed; the die is simple to process, and the processing cost of the die is reduced.

In addition to the above-mentioned back extrusion die, the present utility model further provides a 2500t back extrusion device including the above-mentioned back extrusion die, and the structure of each part of the 2500t back extrusion device is referred to the prior art, and will not be described herein.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The back extrusion die provided by the utility model is described in detail above. The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.

Claims (10)

1. The back extrusion die is characterized by comprising a die body (1), a die pad (2) and a fastener (4), wherein a die cavity is formed in the middle of the die body (1); a spigot (22) is arranged on the periphery of one end face of the die pad (2), an axial step (12) clamped with the spigot (22) is arranged on the periphery of one end face of the die body (1), the spigot (22) and the axial step (12) are annular, and a gap is reserved between the spigot (22) and the axial step (12); the die pad (2) is provided with a connecting hole (21) in a penetrating mode, the die body (1) is provided with a threaded hole (11) on one end face of the axial step (12), the fastener (4) penetrates through the connecting hole (21) and then is in threaded connection with the threaded hole (11), one end of the fastener (4) away from the threaded hole (11) is immersed into the connecting hole (21), a limiting part (23) is arranged in the connecting hole (21), and the fastener (4) can be connected with the limiting part (23) in a matched mode.

2. The back extrusion die according to claim 1, further comprising a positioning pin (3), wherein a first positioning hole is formed in an end face of the die pad (2) provided with the spigot (22), a second positioning hole is formed in an end face of the die body (1) provided with the axial step (12), and two ends of the positioning pin (3) are respectively connected with the first positioning hole and the second positioning hole.

3. The back extrusion die according to claim 1, wherein the fastener (4) is a bolt, the limiting portion (23) is an axial stepped surface provided in the connecting hole (21), and a bolt head of the bolt can be clamped with the axial stepped surface.

4. A back extrusion die according to claim 3, characterized in that the fastener (4) is an M20 bolt.

5. The back extrusion die according to claim 1, characterized in that the clearance between the spigot (22) and the axial step (12) is 0.1-0.2mm.

6. The back extrusion die according to claim 1, wherein the thickness of the die body (1) in the axial direction thereof is 0.6 to 0.7 times the thickness of the die pad (2) in the axial direction thereof.

7. A back extrusion die according to claim 6, characterized in that the die body (1) has a thickness of 60-70mm in its axial direction and the die pad (2) has a thickness of 90-100mm in its axial direction.

8. A back extrusion die according to claim 1, characterized in that the height of the spigot (22) in the axial direction of the die pad (2) is 4-5mm and the width in the radial direction of the die pad (2) is 8-12mm.

9. The back extrusion die according to any one of claims 1 to 8, characterized in that the die body (1) is circumferentially provided with a circumferential step (13), the circumferential step (13) being located on a side of the die body (1) remote from the axial step (12), and a chamfer being provided on a side of the circumferential step (13) close to the axial step (12).

10. A 2500t back extrusion apparatus comprising a back extrusion die, wherein the back extrusion die is the back extrusion die of any one of claims 1 to 9.