阅读说明：本技术 防止憋气的异形零件热镦模具 (Prevent breathing out special-shaped part hot-heading mould ) 是由 刘勇 吴旭 吴传江 张娜 于 2021-09-30 设计创作，主要内容包括：本发明公开了一种防止憋气的异形零件热镦模具,其特征在于；通用圆阳模头(1)插入硬质合金模芯A(2)内,硬质合金模芯A(2)外面套有外套应力环A(5),硬质合金模芯A(2)下面安装硬质合金模芯B(3),外套应力环A(5)下面安装有外套应力环B(6),外套应力环B(6)套在硬质合金模芯B(3)外面,硬质合金模芯B(3)下面插入顶料杆(4),硬质合金模芯A(2)上设置有排气沟槽(7)。本发明异形零件热镦时模具型腔底部气体能排出,镦制后零件退模时间短,效率高。(The invention discloses a special-shaped part hot heading die capable of preventing breath holding, which is characterized in that; the universal round male die head (1) is inserted into a hard alloy die core A (2), an outer sleeve stress ring A (5) is sleeved outside the hard alloy die core A (2), a hard alloy die core B (3) is installed below the hard alloy die core A (2), an outer sleeve stress ring B (6) is installed below the outer sleeve stress ring A (5), the outer sleeve stress ring B (6) is sleeved outside the hard alloy die core B (3), a jacking rod (4) is inserted below the hard alloy die core B (3), and an exhaust groove (7) is formed in the hard alloy die core A (2). According to the invention, gas at the bottom of the die cavity can be discharged during the hot upsetting of the special-shaped part, and the die stripping time of the upset part is short and the efficiency is high.)

1. A special-shaped part hot heading die capable of preventing breath holding is characterized in that a die body is arranged on the die body; the universal round male die head (1) is inserted into a hard alloy die core A (2), an outer sleeve stress ring A (5) is sleeved outside the hard alloy die core A (2), a hard alloy die core B (3) is installed below the hard alloy die core A (2), an outer sleeve stress ring B (6) is installed below the outer sleeve stress ring A (5), the outer sleeve stress ring B (6) is sleeved outside the hard alloy die core B (3), a jacking rod (4) is inserted below the hard alloy die core B (3), and an exhaust groove (7) is formed in the hard alloy die core A (2).

2. The anti-breathing special-shaped part hot heading die as claimed in claim 1, characterized in that; the hard alloy mold core A (2) is conical in outer surface, a groove and a through hole are formed in the middle of the hard alloy mold core A, the upper surface of the through hole is arc-shaped, and the lower surface of the through hole is door-shaped.

3. The anti-breathing special-shaped part hot heading die as claimed in claim 1, characterized in that; the exhaust grooves (7) are obliquely arranged on the hard alloy mold core A (2), and an included angle between the two exhaust grooves (7) is 90 degrees.

4. The anti-breathing special-shaped part hot heading die as claimed in claim 1, characterized in that; the inside of the outer sleeve stress ring A (5) is conical.

5. The anti-breathing special-shaped part hot heading die as claimed in claim 1, characterized in that; the outer surface of the hard alloy mold core B (3) is conical.

6. The anti-breathing special-shaped part hot heading die as claimed in claim 1, characterized in that; the inside of the outer sleeve stress ring B (6) is conical.

Technical Field

The invention belongs to the technical field of machinery, and particularly relates to a special-shaped part hot heading die capable of preventing breath holding.

Background

Among the prior art, can lead to special-shaped parts both sides to suppress the gas position part size that fills out and upset not full because the unable discharge of mould die cavity bottom gas forms high-pressure gas (holding out the gas) when upsetting to special-shaped parts, influence appearance quality when slight, influence the upsetting qualification rate when serious, secondly because hold out the gas, can lead to after the upsetting part demolding time long, influence the upsetting efficiency.

Disclosure of Invention

The invention aims to overcome the defects and provide the special-shaped part hot upsetting die which can discharge gas at the bottom of the die cavity during the hot upsetting of the special-shaped part, has short die withdrawal time of the part after the upsetting and has high efficiency and can prevent gas blockage.

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 breath holding prevention special-shaped part hot heading die which is characterized in that a die body is arranged on the die body; the universal circular male die head is inserted into the hard alloy die core A, the outer sleeve stress ring A is sleeved outside the hard alloy die core A, the hard alloy die core B is arranged below the hard alloy die core A, the outer sleeve stress ring B is arranged below the outer sleeve stress ring A, the outer sleeve stress ring B is sleeved outside the hard alloy die core B, the ejector rod is inserted below the hard alloy die core B, and the hard alloy die core A is provided with an exhaust groove.

The hard alloy mold core A (2) is conical in outer surface, a groove and a through hole are formed in the middle of the hard alloy mold core A, the upper surface of the through hole is arc-shaped, and the lower surface of the through hole is door-shaped.

The exhaust grooves are obliquely arranged on the hard alloy mold core A, and an included angle between the two exhaust grooves is 90 degrees.

The inside of the outer sleeve stress ring A is conical.

The outer surface of the hard alloy mold core B is conical.

The inside of the outer sleeve stress ring B is conical.

Compared with the prior art, the invention has obvious beneficial effects; the technical scheme shows that: the universal circular male die head is inserted into the hard alloy die core A, the outer sleeve stress ring A is sleeved outside the hard alloy die core A, the hard alloy die core B is arranged below the hard alloy die core A, the outer sleeve stress ring B is arranged below the outer sleeve stress ring A, the outer sleeve stress ring B is sleeved outside the hard alloy die core B, the ejector rod is inserted below the hard alloy die core B, and the hard alloy die core A is provided with an exhaust groove. The hard alloy mold core A at the gas-holding position of the special-shaped part is designed and processed with an exhaust groove, so that the generation of high-pressure compressed gas (gas-holding) is prevented. The hot heading die mainly comprises a hard alloy die core A, an outer sleeve compressive stress ring A, an outer sleeve stress ring B, a hard alloy die core B and a universal round male die head. The lower half part of a cavity in the hard alloy mold core A is in the shape of a special-shaped part, the size of the special-shaped part is determined according to the material shrinkage coefficient of the part, the depth size is the thickness size of the head of the part, the upper half part is a circular step hole, the depth of the circular step hole is about 1.5 times of the thickness of the head of the part, and the cavity of the lower half part is concentric; the excircle of the hard alloy mold core A is provided with 5 'to 8' taper, the size of the taper is in conformal interference fit with the inner shape of the outer sleeve compressive stress ring A, and the interference magnitude is 0.28 to 0.30, so that a larger pre-stress is provided for the hard alloy mold core, and the effect of protecting the hard alloy mold core A is achieved; the inner shape of the outer sleeve compressive stress ring A is in conformal interference fit with the appearance of the hard alloy mold core A, the appearance of the outer sleeve compressive stress ring A is in conformal clearance fit with the types of the outer sleeve compressive stress ring B and the mold-filling hard alloy mold core B, and the clearance amount is 0.01-0.05; the general round male die head is in a round table shape, the upper part of the general round male die head is large, the lower part of the general round male die head is small, the round table at the lower end of the general round male die head is a using part of the general round male die head, the size of the general round male die head is in clearance fit with the size of the round table at the upper half part of the hard alloy die core A, the clearance amount is 0.5-0.8, and the length size of the general round male die head is larger than the depth size of the round table at the upper half part of the hard alloy die core A. The key part is an exhaust groove arranged on the hard alloy mold core A. After the hard alloy mold core A and the outer sleeve compressive stress ring A are subjected to interference assembly, two end faces are subjected to flat grinding, then an exhaust groove is formed in a position easy to be subjected to air holding (the position is determined after trial upsetting and is not full on two side faces of the special-shaped part), the exhaust groove is always along the air holding position of the lower profile of the hard alloy mold core A, and redundant air is discharged along the exhaust groove during upsetting from the lower surface → the cylindrical surface → the upper surface, so that the problems of insufficient upsetting caused by air holding during hot upsetting and low material returning efficiency are solved. In summary; according to the invention, gas at the bottom of the die cavity can be discharged during the hot upsetting of the special-shaped part, and the die stripping time of the upset part is short 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 schematic structural diagram of a hard alloy mold core A of the invention;

FIG. 5 is a top view of the cemented carbide core A of the present invention;

FIG. 6 is a bottom view of the cemented carbide core A of the present invention;

fig. 7 is an enlarged view of fig. 6 a.

FIG. 8 is a state diagram of the use of the present invention;

FIG. 9 is a schematic view of the construction of the profile element of the present invention;

figure 10 is a top view of a profiled element according to the invention.

In the drawings, reference numerals

1. The die comprises a general circular male die head, 2 hard alloy die cores A, 3 hard alloy die cores B, 4 ejector rods, 5 outer sleeve stress rings A,6 outer sleeve stress rings B,7 exhaust grooves, 8 upper die seats, 9 upper backing plates, 10 male die fixing sleeves, 11 upper thread back caps, 12 lower thread back caps, 13 lower die fixing pressing covers, 14 special-shaped parts and 15 lower die seats.

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 breath holding prevention special-shaped part hot heading die which is characterized in that a die body is arranged on the die body; the universal round male die head 1 is inserted into a hard alloy die core A2, an outer sleeve stress ring A5 is sleeved outside the hard alloy die core A2, a hard alloy die core B3 is arranged below the hard alloy die core A2, an outer sleeve stress ring B6 is arranged below the outer sleeve stress ring A5, an outer sleeve stress ring B6 is sleeved outside the hard alloy die core B3, a jacking rod 4 is inserted below the hard alloy die core B3, and an exhaust groove 7 is formed in the hard alloy die core A2.

The hard alloy mold core A2 is conical outside, and the middle part is provided with a groove and a perforation, and the upper part of the perforation is arc-shaped, and the lower part is door-shaped.

The exhaust grooves 7 are obliquely arranged on the hard alloy mold core A2, and the included angle between the two exhaust grooves 7 is 90 degrees.

The inside of the outer jacket stress ring a5 is tapered.

The outer surface of the hard alloy mold core B3 is conical.

The inside of the outer jacket stress ring B6 is tapered.

Before use, a hard alloy die core B3, an outer sleeve stress ring B6, a hard alloy die core A2 and an outer sleeve stress ring A5 are sequentially arranged in a die cavity of a lower die base 15 of a press machine, then a lower die fixing gland 13 is used for fixing, a lower thread back cap 12 is used for locking, a universal round male die head 1 is arranged on an upper die base 8, the universal round male die head 1 is locked by an upper thread back cap 11 after being fixed by a male die fixing sleeve 10, press machine equipment is opened, a heated blank special-shaped part 14 to be formed is placed in a round hole type cavity of the hard alloy die core A2, then the press machine works the upper die base 8 to press the universal round male die head 1 into the hard alloy die core A2, the special-shaped blank part 14 begins to fill a die cavity of a2, when the upper end face of the die cavity is almost closed, the lower end face of the die cavity is not completely filled with metal, the part which is not filled with metal is filled with air, the universal round male die head 1 continues to be upset into the special-shaped part 14, at the moment, redundant air is exhausted along the exhaust groove 7 (the exhaust groove 7 is positioned on the hard alloy mold core A2 and is exhausted along the contact surface of the hard alloy mold core A2 and the hard alloy mold core B3 to the contact surface of the hard alloy mold core A2 and a lower mold fixing gland) without forming compressed air to cause air holding (at the moment, air holding is formed if the exhaust groove 7 is not exhausted, when the air holding pressure reaches a certain pressure value, the upset of the special-shaped part 14 is influenced, the blank special-shaped part 14 is heated and formed into the head of the special-shaped part 14 by upsetting until the press reaches a bottom dead center, then the press drives the universal round male mold head 1 to move upwards to reach the top dead center, an air cylinder switch valve is opened, and the air cylinder pushes the ejector rod 4 to withdraw the special-shaped part 14 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.