CN112536413A

CN112536413A - Integrated production process of lower end hardware fitting and forging die thereof

Info

Publication number: CN112536413A
Application number: CN202011205355.6A
Authority: CN
Inventors: 王旭
Original assignee: Wuxi Changzhisheng Machinery Manufacturing Co ltd
Current assignee: Wuxi Changzhisheng Machinery Manufacturing Co ltd
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2021-03-23

Abstract

The invention discloses an integrated forging die of a lower end fitting, which comprises a pre-forging die and a precision forging die, wherein the pre-forging die comprises an upper pre-die and a lower pre-die, the upper pre-die is provided with an upper die cavity for placing blanks, the lower pre-die comprises a lower forging head which is attached to and inserted into the upper die cavity, an upper forging head is vertically arranged in the middle of the upper die cavity, a lower die cavity for inserting the upper forging head is penetrated through the center of the lower forging head, the gap between the lower die cavity and the upper forging head is the same as the wall thickness of an anti-slip head, the length of the lower forging head is smaller than the depth of the upper die cavity, and the pre-forging die is used for processing an initial blank in the shape of the anti-; the precision forging die comprises an upper precision die and a lower precision die, wherein a precision forging cavity with the same shape as the anti-slip head is formed in the lower precision die, the precision forging cavity is sealed by one surface, attached to the lower precision die, of the upper precision die, and a deep hole with the same length and diameter as the screw rod is formed in the middle of the upper precision die. By means of the matching of the preforging die and the precision forging die, the integral forming is realized, the forging piece quality is good, the processing is simple, and the precision is high.

Description

Integrated production process of lower end hardware fitting and forging die thereof

Technical Field

The invention relates to a forging tool die, in particular to an integrated production process of a lower end fitting and a forging die thereof.

Background

Metal fittings, iron or aluminum metal fittings, which are widely used for power transmission lines, are collectively called as fittings. Most hardware fittings need to bear larger pulling force during operation, and some hardware fittings need to ensure good electrical contact.

The hardware has a variety of types and uses, for example, various wire clamps for installing wires, various suspension loops for forming insulator strings, various crimping tubes and repairing tubes for connecting wires, various spacers on split wires, and the like, and various stay wire hardware for towers and the size of the protection wires are related and need to be matched with each other.

The lower end fitting shown in fig. 1, which includes the anti-slip head 1 and the screw rod 2, is generally produced integrally by a casting process in the prior art, but due to the limitation of the casting process, the screw rod has insufficient mechanical strength and is easy to break.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an integrated forging die for a lower end fitting, which has the effect of ensuring the sufficient mechanical strength of a screw.

In order to achieve the technical purpose, the invention provides the following technical scheme: an integrated forging die for a lower-end fitting comprises a pre-forging die and a precision forging die, wherein the pre-forging die comprises an upper pre-die and a lower pre-die, the upper pre-die is provided with an upper die cavity for a blank to be placed in, the lower pre-die comprises a lower forging head which is attached to and inserted into the upper die cavity, an upper forging head is vertically arranged in the middle of the upper die cavity, a lower die cavity for the upper forging head to be inserted into is arranged in the center of the lower forging head in a penetrating mode, the gap between the lower die cavity and the upper forging head is the same as the wall thickness of an anti-slip head, the length of the lower forging head is smaller than the depth of the upper die cavity, and the pre-forging die is used for;

the precision forging die comprises an upper precision die and a lower precision die, wherein a precision forging cavity with the same shape as the anti-slip head is formed in the lower precision die, the precision forging cavity is sealed by one surface, attached to the lower precision die, of the upper precision die, and a deep hole with the same length and diameter as the screw rod is formed in the middle of the upper precision die.

Preferably, the surface of the lower precision die is provided with a sealing groove communicated with the precision forging cavity, the width of the sealing groove is larger than that of the precision forging cavity, the upper precision die is provided with a sealing end attached to the sealing groove, and the deep hole is formed in the sealing end.

Preferably, a through hole penetrates through the middle of the lower precision die, the lower precision die is provided with a die head in threaded connection with the through hole, and the die head and the lower precision die form a precision forging cavity.

In view of the defects in the prior art, another object of the present invention is to provide an integrated forging and processing die for a lower end fitting, which has an effect of ensuring sufficient mechanical strength of a screw.

In order to achieve the technical purpose, the invention provides the following technical scheme: an integrated production process of a lower end fitting comprises the following steps:

s1, processing a disc-shaped blank;

s2, processing the blank into an initial blank with a similar shape of an anti-slip head by using a hydraulic punch through a pre-forging die;

s3, forging the initial blank into the shape of an anti-slip head by means of a precision forging die, and extruding redundant materials into a deep hole to form the shape of a screw rod;

s4, roughly turning external threads of the screw;

s5, finely turning an inner hole and an outer circle of the anti-slip head, and turning fine threads of 0.5 x 0.5 on the outer circle.

In summary, the present invention achieves the following effects:

1. by means of the matching of the preforging die and the precision forging die, the integral forming is realized, the forging piece quality is good, the processing is simple, and the precision is very high;

2. the yield, the precision and the quality completely exceed those of the prior casting or welding parts;

2. after forging, the screw rod is roughly turned by a lathe, and the screw rod is directly turned out, and the screw rod is rolled in the prior art, so that the precision is completely different from that of turning.

Drawings

Fig. 1 is a schematic diagram for showing a fitting to be processed in the present embodiment;

FIG. 2 is a schematic diagram showing a specific structure of a blocker in the present embodiment;

fig. 3 is a schematic view for showing a structure of the precision forging die in this embodiment.

In the figure, 1, an antiskid head; 2. a screw; 3. performing premolding; 31. an upper cavity; 32. an upper forging head; 4. performing lower pre-molding; 41. a lower forging head; 42. a lower cavity; 5. putting a fine die; 51. deep holes; 52. sealing the end; 6. blanking a fine die; 61. a sealing groove; 62. a die head; 63. and (5) precisely forging the cavity.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Example (b): the utility model provides a mould is used in integration forging processing for lower extreme gold utensil, as shown in fig. 2, including preforging die and precision forging die, the preforging die includes cope match-die 3 and lower cope match-die 4, go up cope match-die 3 and offer the last die cavity 31 that supplies the stock to put into, lower cope match-die 4 is including the lower forging head 41 that the laminating inserted die cavity 31, go up the vertical upper forging head 32 that is provided with in the middle of the die cavity 31, lower die cavity 42 that supplies upper forging head 32 to insert is run through at lower forging head 41 central authorities, the clearance of lower die cavity 42 and upper forging head 32 is the same with the wall thickness of anti-skidding head 1, the length of lower forging head 41 is less than the degree of depth of last die cavity 31, the preforging die is used for processing the primary stock of anti.

As shown in fig. 3, the precision forging die comprises an upper precision die 5 and a lower precision die 6, a precision forging cavity 63 with the same shape as the anti-slip head 1 is formed in the lower precision die 6, one surface of the upper precision die 5, which is attached to the lower precision die 6, seals the precision forging cavity 63, and a deep hole 51 with the same length and diameter as the screw 2 is formed in the middle of the upper precision die 5.

As shown in fig. 3, a sealing groove 61 communicating with the finish forging cavity 63 is formed in the surface of the lower finish die 6, the width of the sealing groove 61 is larger than that of the finish forging cavity 63, the upper finish die 5 is provided with a sealing end 52 fitted into the sealing groove 61, and the deep hole 51 is formed in the sealing end 52.

As shown in fig. 3, a through hole penetrates through the lower finishing die 6, the lower finishing die 6 is provided with a die head 62 screwed with the through hole, and the die head 62 and the lower finishing die 6 form a finish forging cavity 63.

An integrated production process of a lower end fitting comprises the following steps:

s1, processing a disc-shaped blank;

s2, processing the blank into a primary blank with a similar shape of the anti-skid head 1 by using a hydraulic punch and a pre-forging die;

s3, forging the initial blank into the shape of the anti-slip head 1 by means of a precision forging die, and extruding redundant materials into the deep hole 51 to form the shape of the screw rod 2;

s4, roughly turning external threads of the screw rod 2;

s5, finely turning an inner hole and an outer circle of the anti-slip head 1, and turning fine threads of 0.5 x 0.5 on the outer circle.

Claims

1. The utility model provides a mould is forged in integration of lower extreme gold utensil which characterized in that: the forging die comprises a pre-forging die and a precision forging die, wherein the pre-forging die comprises an upper pre-die (3) and a lower pre-die (4), the upper pre-die (3) is provided with an upper die cavity (31) for placing blanks, the lower pre-die (4) comprises a lower forging head (41) which is attached to and inserted into the upper die cavity (31), an upper forging head (32) is vertically arranged in the middle of the upper die cavity (31), a lower die cavity (42) for inserting the upper forging head (32) is arranged in the center of the lower forging head (41), the gap between the lower die cavity (42) and the upper forging head (32) is the same as the wall thickness of the anti-sliding head (1), the length of the lower forging head (41) is smaller than the depth of the upper die cavity (31), and the pre-forging die is used for processing blanks in the shape of the anti-sliding head (1;

the precision forging die comprises an upper precision die (5) and a lower precision die (6), a precision forging cavity (63) with the same shape as the anti-slip head (1) is formed in the lower precision die (6), the precision forging cavity (63) is sealed by one surface, attached to the lower precision die (6), of the upper precision die (5), and a deep hole (51) with the same length and diameter as the screw (2) is formed in the middle of the upper precision die (5).

2. The integrated forging die for the lower end fitting of claim 1, wherein: seal groove (61) of intercommunication finish forge die cavity (63) are seted up on the surface of lower finish die (6), seal groove (61) width is greater than finish forge die cavity (63), it inserts seal end (52) of seal groove (61) to go up finish die (5) and is provided with the laminating, deep hole (51) are seted up at seal end (52).

3. The integrated forging die for the lower end fitting of claim 2, wherein: a through hole penetrates through the middle of the lower precision die (6), the lower precision die (6) is provided with a die head (62) in threaded connection with the through hole, and the die head (62) and the lower precision die (6) form a precision forging cavity (63).

4. A production process of an integrated forging die based on the lower end die of any one of claims 1 to 3, comprising the steps of:

s1, processing a disc-shaped blank;

s2, processing the blank into a primary blank with a similar shape of the anti-skid head (1) by using a hydraulic punch and a pre-forging die;

s3, forging the initial blank into the shape of an anti-slip head (1) by means of a precision forging die, and extruding redundant materials into a deep hole (51) to form the shape of a screw (2);

s4, roughly turning external threads of the screw (2);

s5, finely turning an inner hole and an outer circle of the anti-slip head (1), and turning fine threads of 0.5 x 0.5 on the outer circle.