CN213701250U

CN213701250U - Concatenation type terrace die

Info

Publication number: CN213701250U
Application number: CN202020848150.9U
Authority: CN
Inventors: 江孟若; 孙雪琦
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-18
Filing date: 2020-05-18
Publication date: 2021-07-16
Anticipated expiration: 2030-05-18

Abstract

The utility model relates to a concatenation type terrace die, mainly used take shape cyclic annular work piece. The male die comprises: fixed part, shaping part, round pin axle. The forming part is provided with a through hole, and the wall of the through hole of the forming part is provided with four protrusions. The fixing portion surface has four grooves and the fixing portion has a through hole. Any protrusion and any groove form a clamping groove structure. The pin may be inserted into the through hole of the fixing portion. The fixed part and the forming part are connected with the pin shaft through a clamping groove structure. When the male die structure is applied, a special ejection device is provided, and the ejection device consists of an outer ejection ring and an inner ejection ring. The two move together, then the outer ejection ring moves independently to achieve the purpose of ejecting the blank. The male die structure can replace a forming part to meet the production and maintenance requirements, is convenient and quick to replace, and improves the production efficiency. And the production cost is also saved.

Description

Concatenation type terrace die

Technical Field

The utility model relates to a machining technical field, concretely relates to concatenation type terrace die.

Background

When the annular workpiece is formed, a processing method of matching a concave die and a convex die can be adopted, the inner surface of the annular workpiece is processed by the convex die, and the outer surface of the annular workpiece is processed by the concave die. The method has the advantages of high production efficiency, high utilization rate of blanks, excellent mechanical property of manufactured workpieces and wide application, but the male die is easy to wear, the processing cost is increased, and the processing efficiency is reduced.

The punch is typically the part used to form the inner surface of the workpiece. In the prior art, a unitary male mold design is typically employed. This structure has the following problems in production: firstly, the size of the male die cannot be changed, and if the shape and the size of the product are changed, the processing male die can only be redesigned to complete the processing of a new product. The production cost is increased, and the production efficiency is reduced. Secondly, when the cutting edge of the male die is abraded, the male die needs to be dismounted, and then the male die is mounted after the repair is completed, so that the production efficiency is reduced. Thirdly, the part of the male die used for extruding the workpiece is easy to wear, when the part is damaged, the whole male die needs to be replaced, and other parts of the male die are intact and a new male die needs to be produced again, so that unnecessary cost is increased.

At present, a combined type male die is initially researched, and the part of the male die used for extruding a workpiece is replaced to reduce the production cost and increase the production efficiency. However, when the replacement is performed, complicated installation is required. The production efficiency also has the space of promotion.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the spliced male die is mainly used for forming an annular workpiece.

The technical scheme of the utility model is that: a spliced male die comprises a fixing part, a forming part and a pin shaft.

The forming part is provided with a through hole, and the wall of the through hole of the forming part is provided with four protrusions. The fixing portion has a through hole, and the surface of the fixing portion has four grooves. Any groove and any protrusion can be mutually matched to form a clamping groove structure. The pin may be inserted into the through hole of the fixing portion.

A direction of a side where the fixing portions connect the forming portions is referred to as an "up" direction, and a direction of a side opposite to the "up" direction is referred to as a "down" direction. In the description of the present invention, the direction is selected only for the sake of simplifying the description and is not to be construed as the directional limitation of the present invention.

The fixed part and the forming part can be connected with the pin shaft by four clamping groove structures. After the fixing part is connected with the forming part through the clamping groove structure, the pin shaft can be inserted into the through hole of the fixing part, after the pin shaft is inserted into the through hole of the fixing part, the side surface of the pin shaft is tightly attached to the surface of the through hole of the fixing part, the lower surface of the pin shaft is tightly attached to the forming part, the lower surface of the forming part is tightly attached to the fixing part, the forming part and the pin shaft are spliced together, and the stability of the forming part and the fixing part in connection is ensured.

When the annular workpiece is extruded, the material is extruded into the forming cavity from one end of the male die fixing part and is extruded from the other end of the male die fixing part.

The spliced male die is provided with a special ejection device for ejecting the blank. The special ejection device comprises an inner ejection ring and an outer ejection ring and is positioned between the inner die holder and the outer die holder. The inner ejection ring and the outer ejection ring move together to extrude the billet so that the residual billet between the forming part and the ejection device participates in forming. And when the inner ejection ring is pressed against the surface of the forming part, the inner ejection ring stops moving, and the outer ejection ring continues moving to eject the blank. And after the blank is obtained, finishing the blank to obtain the annular workpiece.

The forming parts are provided with a plurality of cuboids, cylinders and prisms, and the shapes and the sizes of the different forming parts are different and can be replaced according to production requirements.

It should be noted that, when viewed from the direction "up" to the direction "down", the outer contour of the fixing portion should not protrude beyond the outer contour of the forming portion, so as not to cause the fixing portion to affect the inner surface of the annular workpiece.

It should be noted that, when viewed from the direction "up" to the direction "down", the pin shaft should not protrude from the outer contour of the formed part in the axial direction of the pin shaft itself, so as not to affect the inner surface of the annular workpiece by the pin shaft.

It should be noted that, when viewed from the direction "up" to the direction "down", the outer contour of the forming portion should completely protrude from the inner contour of the inner ejection ring and should not protrude from the outer contour of the inner ejection ring, so as to ensure smooth proceeding of the ejection process.

The utility model has the advantages that: 1. when the size of the workpiece needs to be changed, only the forming part needs to be replaced, and the fixing part does not need to be replaced, so that the production cost is reduced, and the production efficiency is improved. 2. When the cutting edge of the male die is worn or damaged, only the forming part needs to be repaired or replaced without replacing the fixing part, so that the production cost is reduced, and the production efficiency is improved. 3. When the forming part is replaced, the forming part is connected with the fixing part through the clamping groove structure and the pin shaft, so that the replacement process is quick and convenient, and the production efficiency is improved.

Drawings

FIG. 1 is a schematic view of a spliced male mold forming section.

Fig. 2 is a schematic view of the fixing part of the split type male die.

FIG. 3 is a schematic structural diagram of the spliced male die forming part, the fixed part and the pin shaft when not spliced.

FIG. 4 is a schematic structural diagram of the spliced male die after the forming part, the fixing part and the pin shaft are spliced.

Fig. 5 is a schematic view of the application of the split punch to an extrusion device.

Fig. 6 is a schematic diagram of the blank ejection process of the extrusion forming device using the split type male die.

Wherein: 1. a forming section; 2. a fixed portion; 3. a pin shaft; 4. an upper die holder; 5. a blank; 6. a female die; 7. an outer die holder; 8. an outer ejection ring; 9. an inner ejection ring; 10. an inner die holder.

Detailed Description

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

As shown in fig. 3, a split type male die is divided into three parts: forming part 1, fixed part 2, round pin axle 3. The forming part 1 has a through hole with four protrusions on the wall. The fixing portion 2 has a through hole. The surface of the fixed part 2 is provided with four grooves, and any protrusion is matched with any groove to form a clamping groove structure.

As shown in fig. 4, after the fixing portion of the split-type male die is fixed to the extrusion molding apparatus, the protrusion of the molding portion 1 and the groove of the fixing portion 2 are used to connect the molding portion 1 and the fixing portion 2, and after the lower surface of the molding portion 1 is tightly attached to the fixing portion 2, the pin 3 is inserted into the through hole of the fixing portion, and it is necessary to pay attention to the relative position of the pin 3 and the molding portion, and when viewed from "up" to "down", the pin 3 is inserted into the through hole of the fixing portion and then does not protrude out of the outer contour of the molding portion 1 in the axial direction of the pin 3. The side surface of the pin shaft 3 is tightly attached to the surface of the through hole of the fixing part, the lower surface of the pin shaft 3 is tightly attached to the forming part 1, and the forming part 1, the fixing part 2 and the pin shaft 3 are spliced together. The forming part 1 is stably connected with the fixing part 2.

As shown in fig. 5, after the joining of the forming portion 1 and the fixing portion 2 is completed, the annular workpiece is placed into a forming chamber of an extruder, the extruder is started, and the workpiece is formed by extrusion between dies. The shape of the inner wall of the extruded blank is determined by the forming part 1, and the shape of the outer wall is determined by the female die 6.

As shown in fig. 6, the ejection process is divided into two steps. After the female die 6 is pressed against the outer die holder 7, the inner ejection ring 9 and the outer ejection ring 8 move together towards the forming part 1 to extrude the blank 5, so that the residual part of the blank 5 between the forming part 1 and the inner ejection ring 9 and the outer ejection ring 8 passes through the forming cavity to participate in forming. After the inner ejection ring 9 is pressed against the surface of the forming part 1, the inner ejection ring 9 stops moving, the outer ejection ring 8 continues moving to complete ejection of the blank, and after the ejected blank is obtained, the blank is trimmed to obtain a required annular workpiece.

When the production requirement needs to change the shape of the inner wall of the annular workpiece, the fixed part 2 does not need to be detached, and only the forming part 1 with different shapes needs to be replaced. When the cutting edge is worn or damaged, the fixed part 2 does not need to be detached, and only the forming part 1 needs to be repaired or replaced.

Claims

1. The spliced male die is characterized in that: the forming part is provided with a through hole, the hole wall of the through hole of the forming part is provided with four protrusions, the fixing part is provided with a through hole, the surface of the fixing part is provided with four grooves, any groove is matched with any protrusion to form a clamping groove structure, and the pin can be inserted into the through hole of the fixing part.

2. The split punch of claim 1, wherein: the fixed part and the forming part can be connected with each other by a clamping groove structure and a pin shaft, if the direction of one side of the fixed part connected with the forming part is called as the direction 'up' and the direction of the side opposite to the direction 'up' is called as the direction 'down', the pin shaft can be inserted into the through hole of the fixed part after the fixed part and the forming part are connected by the clamping groove structure, after the pin shaft is inserted into the through hole of the fixed part, the side surface of the pin shaft is tightly attached to the surface of the through hole of the fixed part, the lower surface of the pin shaft is tightly attached to the forming part, the lower surface of the part of the forming part is tightly attached to the fixed part, and the fixed part, the forming part and the pin shaft are spliced together to ensure.

3. The split punch of claim 1, wherein: the forming parts are provided with a plurality of cuboids, cylinders and prisms, and the shapes and the sizes of the different forming parts are different and can be replaced according to production requirements.

4. The split punch of claim 1, wherein: the special ejection device comprises an inner ejection ring and an outer ejection ring, and is positioned between the inner die holder and the outer die holder, the inner ejection ring and the outer ejection ring move together to extrude a blank, so that the residual blank positioned between a forming part and ejection equipment participates in forming, after the inner ejection ring is pressed against the surface of the forming part, the inner ejection ring stops moving, and the outer ejection ring continues to move to finish ejection of the blank.