CN214720234U - Cold heading closed pre-deformation die for T-shaped cylindrical fastening bolt - Google Patents

Abstract

A cold heading closed pre-deformation die for T-shaped cylindrical body fastening bolts comprises a spring, a punch, a pre-deformation die, an upper die, a lower die and a lower die seat; the upper die is provided with a hollow bin; one end of the pre-deformation die is provided with There is a first cavity groove; the bottom surface of the first cavity groove is provided with a blind installation hole; the other end of the pre-deformation die slides into the hollow chamber and is connected to the spring; the springs are connected to the inner wall of the hollow chamber; one end of the punch is connected to the installation The inner wall of the blind hole; the lower die is connected to the lower die base; the end face of the lower die is provided with a second cavity groove; the bottom surface of the second cavity groove is provided with a through hole for the punch to pass through; the upper end face of the lower die In the state of being in contact with the lower end surface of the pre-deformation die, the first cavity groove and the second cavity groove form a sealed pre-deformation bin for extruding and deforming the blank. The cold heading closed pre-deformation die provided by the utility model can meet the requirements of forming bolts of various shapes, and can effectively improve the forming quality of the bolt head and the utilization rate of materials.

Description

Cold heading closed pre-deformation die for T-shaped cylindrical fastening bolt

Technical Field

The utility model relates to a bolt production technical field especially relates to a T shape cylinder fastening bolt cold-heading seals predeformation mould.

Background

The product shown in the attached figures 1 and 2 is a bolt for fixing a fuel tank of a heavy-duty car; the head of the bolt is in a T-shaped cylinder shape and penetrates through the rod part of the bolt to form the overall bolt appearance structure; the head structure of a T-shaped bolt commonly seen in the market at present is generally a cuboid, and a T-shaped cylinder structure is very rare; because the bolt head of the T-shaped cylinder head structure is made of more materials and has large upsetting deformation degree, the head of the product is formed on a cold header at one time, so that the difficulty is great; however, if other machining methods are adopted to manufacture the bolt, the normal production requirements cannot be met, and the machining cost is extremely high; because the blank forming of the product is directly finished on the cold header, whether the design of the cold-heading pre-deformation die is reasonable or not is a main factor directly influencing the success and failure of the cold forming process of the final-heading product, and the final quality of the head of the bolt is also decisive.

SUMMERY OF THE UTILITY MODEL

Objects of the invention

For solving the technical problem who exists among the background art, the utility model provides a pre-deformation mould is sealed in T shape cylinder fastening bolt cold-heading, the utility model provides a pre-deformation mould is sealed in cold-heading can satisfy the bolt to multiple shape and carry out fashioned demand, can effectively promote the utilization ratio of bolt head shaping quality and material.

(II) technical scheme

The utility model provides a T-shaped cylinder fastening bolt cold heading closed predeformation die, which comprises a spring, a punch rod, a predeformation die, an upper die, a lower die and a lower die holder;

a hollow bin is arranged in the upper die; an opening is formed in one end of the upper die of the hollow bin;

one end of the pre-deformation die is provided with a first cavity groove; the bottom surface of the first cavity groove is provided with a mounting blind hole; the other end of the pre-deformation die extends into the hollow bin in a sliding mode through the opening and is connected with a spring; the springs are all connected with the inner wall of the hollow bin;

one end of the punching rod penetrates through the first cavity groove and extends into the mounting blind hole, and one end of the punching rod is connected with the inner wall of the mounting blind hole;

the lower die is connected with a lower die base; in the installation state of the lower die, the lower die is positioned right below the pre-deformation die, and a second cavity groove is formed in the end face, facing the pre-deformation die, of the lower die; the bottom surface of the second cavity groove is provided with a through hole for the punch rod to pass through; and under the condition that the upper end surface of the lower die is in a fit state with the lower end surface of the pre-deformation die, the springs are in a compressed state, the other side of the punch rod penetrates through the through hole in a matched mode, and the first cavity groove and the second cavity groove form a sealed pre-deformation bin for extrusion deformation of blanks.

Preferably, the spring is provided in plurality; the plurality of springs are uniformly distributed in a circumference mode by taking the central axis of the pre-deformation die as the center.

Compared with the prior art, the above technical scheme of the utility model following profitable technological effect has:

the utility model discloses in, adopt the utility model provides a cold-heading seals predeformation mould according to the metal cold deformation flow principle to and the upset unstability criterion, the second die cavity groove of rational design lower mould and the first die cavity groove of predeformation mould, the blank that will process carries out extrusion deformation in sealed predeformation storehouse, avoid the unstability phenomenon of product in the predeformation deformation process, let the head of blank extend the deformation in advance to the X axle direction simultaneously, the metal deformation of the station after being convenient for flows and forms required head shape gradually, realized once accomplishing product blank shaping on multistation cold heading machine, reached high efficiency, high-quality, the purpose of mass production; in addition, the space shape of the pre-deformation bin is designed according to the shape of the head of the bolt, so that the requirement of high-efficiency and high-quality production of bolts with different head shapes is met.

Drawings

Fig. 1 is a front view of a bolt for fixing an oil tank of a conventional heavy-duty car.

Fig. 2 is a right side view of fig. 1.

Fig. 3 is the utility model provides a T shape cylinder fastening bolt cold-heading seals the schematic structure of predeformation mould.

Fig. 4 is a schematic view of the pre-deformed blank of fig. 3.

Fig. 5 is the utility model provides a predeformation mould's among T shape cylinder fastening bolt cold-heading seals predeformation mould structural schematic.

Fig. 6 is a right side view of the knot of fig. 5.

Fig. 7 is a perspective view of a pre-deformed product according to an embodiment of the present invention.

Reference numerals: 1. a spring; 2. punching a rod; 3. pre-deforming the mold; 4. an upper die; 5. a lower die; 6. a blank; 7. a lower die holder; 101. and (4) a hollow bin.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

As shown in fig. 3-6, the utility model provides a T-shaped cylinder fastening bolt cold heading seals predeformation mould, including spring 1, impact bar 2, predeformation mould 3, upper die 4, lower mould 5 and die holder 7;

a hollow bin 101 is arranged in the upper die 4; the hollow bin 101 is provided with an opening at one end of the upper die 4;

one end of the pre-deformation die 3 is provided with a first cavity groove; the bottom surface of the first cavity groove is provided with a mounting blind hole; the other end of the pre-deformation die 3 is extended into the hollow bin 101 in a sliding mode through the opening and is connected with the spring 1; the springs 1 are all connected with the inner wall of the hollow bin 101;

one end of the punching rod 2 penetrates through the first cavity groove and extends into the mounting blind hole, and one end of the punching rod 2 is connected with the inner wall of the mounting blind hole;

the lower die 5 is connected with a lower die base 7; in the installation state of the lower die 5, the lower die 5 is positioned right below the pre-deformation die 3, and a second cavity groove is formed in the end face, facing the pre-deformation die 3, of the lower die 5; the bottom surface of the second cavity groove is provided with a through hole for the punch rod 2 to pass through; the upper end face of the lower die 5 is in a fit state with the lower end face of the pre-deformation die 3, the spring 1 is in a compressed state, the other side of the punch rod 2 is matched to penetrate through the through hole, and the first cavity groove and the second cavity groove form a sealed pre-deformation bin for extrusion deformation of the blank 6; the space shape of the pre-deformation bin and the shape of the product to be obtained.

In an alternative embodiment, the spring 1 is provided in plurality; the plurality of springs 1 are uniformly distributed in a circumference manner by taking the central axis of the pre-deformation die 3 as the center; the spring 1 is in the form of a single piece.

Specific examples are:

the utility model provides a method for processing products by a T-shaped cylinder fastening bolt cold heading closed predeformation die, which comprises the steps of firstly connecting an upper die 4 in the T-shaped cylinder fastening bolt cold heading closed predeformation die with the movable end of a cold heading machine and installing a lower die holder 7 on a frame of the cold heading machine, wherein the upper die 4 is positioned right above the lower die holder 7; the concrete during operation:

s1, placing the blank 6 in a second cavity groove of the lower die 5;

s2, the cold header operates to drive the upper die 4 to gradually approach the lower die base 7, and the upper end face of the blank 6 is gradually inserted into the first cavity groove;

along with the downward movement of the upper die 4, the spring 1 is compressed and deformed, and the blank 6 is not deformed;

s3, the cold header continues to operate until the upper end face of the lower die 5 is attached to the lower end face of the pre-deformation die 3, at the moment, the blank 6 is completely accommodated in the pre-deformation bin, and the blank 6 is extruded and deformed in the pre-deformation bin; because the pre-deformation bin is in a closed state, the blank 6 can only flow along the shape of the pre-deformation bin in the pre-deformation bin, the whole cavity is filled with the blank along with the completion of the extrusion process, the pre-deformed shape of the required product is obtained as shown in the attached figure 7, and meanwhile, the phenomenon of deformation instability caused by overlarge deformation ratio is also avoided;

the utility model discloses in, adopt the utility model provides a T shape cylinder fastening bolt cold-heading seals predeformation mould adds man-hour to blank 6, and the preformed shape of blank 6 is when carrying out the deformation of back station head, is favorable to the metal to flow to its length direction very much, takes shape to finally accomplishing the head cold-heading and has played decisive effect, can effectively promote product head shaping quality and promote material utilization and rate, can bring more economic benefits for the enterprise.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims (1)

1. A T-shaped cylinder fastening bolt cold heading closed pre-deformation die is characterized by comprising a spring (1), a punch rod (2), a pre-deformation die (3), an upper die (4), a lower die (5) and a lower die holder (7);

a hollow bin (101) is arranged in the upper die (4); an opening is formed in one end of the upper die (4) of the hollow bin (101);

one end of the pre-deformation die (3) is provided with a first cavity groove; the bottom surface of the first cavity groove is provided with a mounting blind hole; the other end of the pre-deformation die (3) is slidably extended into the hollow bin (101) through the opening and is connected with the spring (1); the springs (1) are connected with the inner wall of the hollow bin (101);

one end of the punching rod (2) penetrates through the first cavity groove and extends into the mounting blind hole, and one end of the punching rod (2) is connected with the inner wall of the mounting blind hole;

the lower die (5) is connected with a lower die base (7); in the installation state of the lower die (5), the lower die (5) is positioned right below the pre-deformation die (3), and a second cavity groove is formed in the end face, facing the pre-deformation die (3), of the lower die (5); the bottom surface of the second cavity groove is provided with a through hole for the punch rod (2) to pass through; and under the condition that the upper end surface of the lower die (5) is attached to the lower end surface of the pre-deformation die (3), the spring (1) is in a compressed state, the other side of the punch rod (2) penetrates through the through hole in a matched mode, and the first cavity groove and the second cavity groove form a sealed pre-deformation bin for extrusion deformation of the blank (6).

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