Large-upsetting-ratio bolt head pre-upsetting die

Abstract

The utility model discloses a large upsetting ratio bolt head pre-upsetting die which comprises an upper bottom plate, a lower bottom plate and a material returning cross beam, an upper punch is installed on the upper bottom plate, a tail punch, a material ejecting punch and an adjusting pad are arranged on the lower bottom plate, a lower round die outer sleeve is arranged on the adjusting pad, and a lower die is arranged in the lower round die outer sleeve. And the upper bottom plate, the lower bottom plate and the material returning cross beam are connected together through pull rods. Compared with the prior art, the head pre-upsetting die has the positive effects that 1, the head pre-upsetting die is convenient to change, and products with different sizes can be produced only by replacing the upper punch, the lower die and the guide die; 2, according to the head pre-upsetting die, the height size of the head can be finely adjusted by replacing the adjusting pad, and the operation is simple and convenient; and 3, the head pre-upsetting die positioning structure is good in use effect, the size of a produced product is stable, and the head pre-upsetting die positioning structure can be widely used in the production of forming the head of a bolt with a large upsetting ratio.

Description

TECHNICAL FIELD

[0001] The utility model relates to a big upsetting ratio bolt head pre-upsetting die. BACKGROUND

[0002] Upsetting ratio refers to the ratio of the length of the deformed part of the blank to the diameter, and the upsetting ratio directly affects the quality of the product and the service life of the die in practical application. When the upsetting ratio is too large, longitudinal bending may occur during one upsetting, resulting in defects such as product interlayer. Therefore, the product with large upsetting ratio needs to be pre-upset, and the process is as shown in the figure. Figure 1 The utility model discloses a pre-upsetting die designed for the pre-upsetting process. SUMMARY

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the utility model provides a big upsetting ratio bolt head pre-upsetting die.

[0004] The utility model discloses a big upsetting ratio bolt head pre-upsetting die, which comprises an upper bottom plate, a lower bottom plate and a material returning beam, an upper punch is installed on the upper bottom plate, a tail punch, a material lifting punch and an adjusting pad are arranged on the lower bottom plate, a lower round die outer sleeve is arranged on the adjusting pad, a lower die is arranged in the lower round die outer sleeve, and the upper bottom plate, the lower bottom plate and the material returning beam are connected together through a pull rod.

[0005] Further, a guide die is arranged in the lower round die outer sleeve.

[0006] Further, the upper punch is connected together with the upper bottom plate through an upper die seat.

[0007] Further, the lower die is assembled together with the lower round die outer sleeve through interference fit.

[0008] Further, the material returning beam and the pull rod are fixed together through screw thread connection.

[0009] Further, the pull rod and the upper bottom plate are fixed together through screw thread connection.

[0010] Further, a material returning tail punch is arranged on the material returning beam.

[0011] Further, the upper bottom plate is connected with the equipment sliding block through bolts.

[0012] Compared with the prior art, the utility model has the following positive effects:

[0013] 1、The head pre-upsetting die of the utility model is convenient to change type, and only needs to replace the upper punch, the lower die and the guide die to produce products of different sizes.

[0014] 2. The head pre-upsetting mold of this utility model can be finely adjusted in terms of head height by changing the adjustment pad, which is simple and convenient to operate.

[0015] 3. The head pre-upsetting mold positioning structure of this utility model has good performance and produces products with stable dimensions. It can be widely used in the production of bolt heads with large upsetting ratio. Attached Figure Description

[0016] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0017] Figure 1 This is a schematic diagram of the pre-upsetting process for products with a large upsetting-to-forging ratio;

[0018] Figure 2 This is a schematic diagram of the head pre-upsetting mold of this utility model;

[0019] The reference numerals in the figure include: upper base plate 1, upper mold base 2, upper punch 3, lower mold 4, lower round mold outer sleeve 5, guide mold 6, ejector punch 7, adjusting pad 8, tie rod 9, lower base plate 10, tail punch 11, ejector tail punch 12, and ejector crossbeam 13. Detailed Implementation

[0020] A type of pre-upsetting die for bolt heads with a large upsetting ratio, such as Figure 2 As shown, it includes: upper base plate 1, upper mold base 2, upper punch 3, lower mold 4, lower round mold outer sleeve 5, guide mold 6, ejector punch 7, adjusting pad 8, tie rod 9, lower base plate 10, tail punch 11, ejector tail punch 12, and ejector crossbeam 13, wherein:

[0021] The upper punch 3 is connected to the upper base plate 1 via the upper die holder 2. The ejector tail punch 12 is placed on the ejector beam 13. The ejector beam 13 is fixed to the tie rod 9 via a threaded connection. The tie rod 9 is fixed to the upper base plate 1 via a threaded connection. The upper base plate 1 is bolted to the equipment slider. The lower die 4 and the lower circular die sleeve 5 are assembled together via an interference fit. A guide die 6 is set in the lower circular die sleeve 5. The lower circular die sleeve 5 is placed on the adjusting pad 8. The adjusting pad 8 is placed on the lower base plate 10. The tail punch 11 and the ejector punch 7 are set on the lower base plate 10.

[0022] The method of using the head pre-upsetting mold of this utility model includes the following steps:

[0023] Step 1: Install the upper punch 3 in the upper die holder 2, and then connect the upper die holder 2 to the upper base plate 1 with bolts;

[0024] Step 2: Place the ejector punch 12 on the ejector beam 13, and then fix the ejector beam 13 and the pull rod 9 together by threaded connection;

[0025] Step three, set tail punch 11 and top material punch 7 on the lower base plate 10, then install the lower base plate 10 with the pull rod 9 together, and then fix the pull rod 9 with the upper base plate 1 through threaded connection;

[0026] Step four, place the guide die 6 in the lower round die outer sleeve 5, then assemble the lower die 4 with the lower round die outer sleeve 5 through interference fit, then place the workpiece in the lower die 4 and position it through the guide die 6;

[0027] Step five, place the lower round die outer sleeve 5 on the adjusting pad 8, and then place the adjusting pad 8 on the lower base plate 10;

[0028] Step six, place the lower base plate 10 on the equipment workbench, and connect the upper base plate 1 to the equipment slide through bolts;

[0029] Step seven, the equipment slide goes down, driving the upper punch 3 to move downward, cooperating with the top material punch 7 and the tail punch 11 to extrude the workpiece to make the workpiece form in the lower die 4;

[0030] Step eight, after forming, the equipment slide goes up, driving the pull rod 9 and the material withdrawal cross beam 13 connected with the pull rod 9 to go up, the material withdrawal cross beam 13 drives the material withdrawal tail punch 12 to go up, after going up for a distance, the material withdrawal tail punch 12 contacts with the tail punch 11, driving the top material punch 7 to go up, and the workpiece is ejected.

[0031] The utility model discloses through replacing upper punch 3, lower die 4, guide die 6 can realize quick change of type, through replacing adjusting pad 8 can carry out the fine adjustment to the head height size, and the adjustment is simple and convenient.

Claims

1. A large upset ratio bolt head pre-upset die characterized by: It comprises an upper bottom plate, a lower bottom plate and a material returning beam, an upper punch is installed on the upper bottom plate, a tail punch, a material ejecting punch and an adjusting pad are arranged on the lower bottom plate, a lower round die sleeve is arranged on the adjusting pad, and a lower die is arranged in the lower round die sleeve.

2. A large upset ratio bolt head pre-upset die according to claim 1, characterized in that: A guide die is arranged in the lower round die sleeve.

3. A large upset ratio bolt head pre-upset die according to claim 1, characterized in that: The upper punch is connected with the upper bottom plate through an upper die seat.

4. A large upset ratio bolt head pre-upset die according to claim 1, characterized in that: The lower die is assembled with the lower round die sleeve through interference fit.

5. A large upset ratio bolt head pre-upset die according to claim 1, characterized in that: The material returning beam is fixed with the pull rod through thread connection.

6. A large upset ratio bolt head pre-upset die according to claim 1, characterized in that: The pull rod is fixed with the upper bottom plate through thread connection.

7. A large upset ratio bolt head pre-upset die according to claim 1, characterized in that: A material returning tail punch is arranged on the material returning beam.

8. A large upset ratio bolt head pre-upset die according to claim 1, characterized in that: The upper bottom plate is connected with an equipment slide through bolts.

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