阅读说明：本技术 四方头带倒角螺栓头部成形热镦模具 (Hot heading die for forming head of square head chamfer bolt ) 是由 刘勇 刘德军 吴旭 王红宇 于 2021-09-29 设计创作，主要内容包括：本发明公开了一种四方头带倒角螺栓头部成形热镦模具,其特征在于；模头座(1)下端头设置有四方阳模头(2),四方阳模头(2)插入头部成形模具(3)上端,头部成形模具(3)下端插入顶料杆(5),头部成形模具(3)外面套有外套应力环(4)。本发明四方头的头部及头部内边倒角全部镦制成形,减少后续倒角加工工序,且镦制的倒角光滑无毛刺,产品质量好,效率高。(The invention discloses a hot heading die for forming a square head fillet bolt head, which is characterized in that a hot heading die is arranged on the head of a square head fillet bolt; the lower end of the die head seat (1) is provided with a square male die head (2), the square male die head (2) is inserted into the upper end of the head forming die (3), the lower end of the head forming die (3) is inserted into the ejector rod (5), and an outer sleeve stress ring (4) is sleeved outside the head forming die (3). The head part of the square head and the chamfer angles on the inner side of the head part are all formed by upsetting, so that the subsequent chamfer angle processing procedures are reduced, and the upset chamfer angles are smooth and have no burrs, the product quality is good, and the efficiency is high.)

1. A hot heading die for forming the head of a square head chamfer bolt is characterized in that the hot heading die comprises a die body, a die head and a die head; the lower end of the die head seat (1) is provided with a square male die head (2), the square male die head (2) is inserted into the upper end of the head forming die (3), the lower end of the head forming die (3) is inserted into the ejector rod (5), and an outer sleeve stress ring (4) is sleeved outside the head forming die (3).

2. The fillet bolt head forming hot heading die as claimed in claim 1, wherein; the head forming die (3) is conical in outside, a square hole is formed in the upper end of the inside of the head forming die, a chamfer is formed below the hole, a round through hole is formed in the middle of the head forming die and the lower end of the head forming die, the square hole is communicated with the round through hole, and the ejector rod (5) can move up and down in the round through hole.

3. The fillet bolt head forming hot heading die as claimed in claim 1, wherein; the inner part of the outer sleeve stress ring (4) is provided with a conical perforation.

4. The fillet bolt head forming hot heading die as claimed in claim 1, wherein; the top end of the ejector rod (5) is provided with a groove.

5. The fillet bolt head forming hot heading die as claimed in claim 1, wherein; the square male die head (2) can move up and down in the head forming die (3).

Technical Field

The invention belongs to the technical field of machinery, and particularly relates to a hot heading die for forming a fillet bolt head of a square head.

Background

For a long time, four sides of the inner four-side chamfer of the head part of a square bolt with chamfers are all formed by upsetting into a round head and then milling the four sides of the head part, and then milling the chamfer at the inner sides of the four sides according to requirements.

Disclosure of Invention

The invention aims to overcome the defects and provide the cold-heading knockout sleeve which is capable of completely upsetting and forming the head part of the square head and the chamfer angle inside the head part, reducing the subsequent chamfer angle processing procedures, and avoiding blockage due to smooth and burr-free upset chamfer angles, good in product quality and high in efficiency.

The purpose of the invention and the main technical problem of solving the invention are realized by adopting the following technical scheme:

the invention discloses a hot heading die for forming the head of a square head chamfer bolt, which is characterized in that a square head chamfer bolt is provided with a square head chamfer; the lower end of the die head seat is provided with a square male die head, the square male die head is inserted into the upper end of the head forming die, the lower end of the head forming die is inserted into the ejector rod, and the outer sleeve stress ring is sleeved outside the head forming die.

The head forming die is conical outside, a square hole is formed in the upper end of the interior of the head forming die, a chamfer is formed below the hole, a round through hole is formed in the middle of the head forming die and the lower end of the head forming die, the square hole is communicated with the round through hole, and the ejector rod can move up and down in the round through hole.

The inner part of the outer sleeve stress ring is provided with a conical through hole.

The top end of the ejector rod is provided with a groove.

The square male die head can move up and down in the head forming die.

Compared with the prior art, the invention has obvious beneficial effects; the technical scheme shows that: a square male die head is arranged at the lower end of a die head seat and inserted into the upper end of a head forming die, an ejector rod is inserted into the lower end of the head forming die, and an outer sleeve stress ring is sleeved outside the head forming die. The traditional four-side and inner four-side chamfering processing of the milling head is replaced by upsetting the once-formed four-side head, so that the processing efficiency is improved; the flow line of the head of the upset square head is complete, the chamfer at the sharp corner is smooth and has no burr, and the related mechanical property and the product appearance quality of the square head part are improved; the die head seat and the square male die head of the hot heading die are integrated, the concentricity of the die head seat and the square male die head after heading completely meets the requirement of a part, and the subsequent machining allowance of the part is reduced; the hot heading die is used for forming the head-shaped part by hot heading, and during heading, the raw material blank is heated to improve the plasticity of the raw material blank and reduce the heading deformation resistance and then is subjected to heading forming, so that the problem of head size forming of a head square head of a material which is easy to be upset and cracked at normal temperature and a special material with larger heading deformation resistance at normal temperature is solved, and the scope of heading materials is improved. In summary; the head part of the square head and the chamfer angles on the inner side of the head part are all formed by upsetting, so that the subsequent chamfer angle processing procedures are reduced, and the upset chamfer angles are smooth and have no burrs, the product quality is good, and the efficiency is high.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a cross-sectional view of FIG. 2A-A;

FIG. 4 is a bottom view of a die holder, square male die head of the present invention;

FIG. 5 is a top view of the head forming die, outer stress ring of the present invention;

FIG. 6 is a schematic view of the construction of the ejector pin of the present invention;

FIG. 7 is a state diagram of the use of the present invention;

figure 8 is a front view of the square head component of the present invention.

In the drawings, reference numerals

1. The die comprises a die head seat, 2 parts of a square male die head, 3 parts of a head forming die, 4 parts of an outer sleeve stress ring, 5 parts of a material ejecting rod, 6 parts of an upper die seat, 7 parts of an upper backing plate, 8 parts of a male die fixing sleeve, 9 parts of an upper thread back cap, 10 parts of a lower thread back cap, 11 parts of a lower die fixing gland, 12 parts of a square head and 13 parts of a lower die seat.

Detailed Description

The details of the embodiments, structures, features and functions according to the present invention are described in the following detailed description and the preferred embodiments.

The invention discloses a hot heading die for forming the head of a square head chamfer bolt, which is characterized in that a square head chamfer bolt is provided with a square head chamfer; the lower end of the die head seat 1 is provided with a square male die head 2, the square male die head 2 is inserted into the upper end of the head forming die 3, the lower end of the head forming die 3 is inserted into the ejector rod 5, and the outer sleeve stress ring 4 is sleeved outside the head forming die 3.

The head forming die 3 is conical in outside, a square hole is formed in the upper end of the inside of the head forming die, a chamfer is formed below the hole, a round through hole is formed in the middle of the head forming die and the lower end of the head forming die, the square hole is communicated with the round through hole, and the ejector rod 5 can move up and down in the round through hole.

The inner part of the outer sleeve stress ring 4 is provided with a conical perforation.

The top end of the ejector rod 5 is provided with a groove.

The square male die head 2 can move up and down in the head forming die 3.

When the hot upsetting die is used, referring to fig. 7, a hot upsetting die formed by combining an outer sleeve stress ring 4 and a square male die head 2 is installed in a die cavity of a lower die base 13 of a press machine, the die cavity is locked by a lower thread back cap 10 after being fixed by a lower die fixing gland 11, the upper die base 6 is provided with the die base 1 and the square male die head 2 with the same specification, the die base is locked by an upper thread back cap 9 after being fixed by a male die fixing sleeve 8, the press machine is opened, a heated blank part to be formed is placed into a round hole type cavity of a head forming die 3, then the square male die head 2 is pressed into the die cavity of the head forming die 3 by the press machine, the heated blank part is upset to form the head of the square head part 12, and then the part is ejected by an ejector rod 5 to complete a work cycle.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the present invention without departing from the technical spirit of the present invention.