CN216881443U - A Superplastic Forming Device for Amorphous Spur Gears - Google Patents

Abstract

The utility model relates to the technical field of the preparation of bulk amorphous alloys, and discloses a superplastic forming device for an amorphous spur gear, comprising a heating temperature control device, an extrusion die, a detachable extrusion rod and a spacer; The heating and temperature control device is composed of a resistance furnace and a thermocouple. The heating method of the resistance furnace is resistance heating. The thermocouple is used for temperature measurement and temperature control. The resistance furnace is filled with inert gases such as argon and nitrogen for gas heating. protection; the extrusion die is composed of an upper module, a shaft sleeve, a detachable movable die and a lower template; the die adopts a detachable movable die, which is different from the previous fixed die, which can be directly disassembled and replaced. It is more convenient to form amorphous spur gears with different numbers of teeth and modules, which is convenient for experimenters and improves practicability. The movable concave die in the utility model adopts a high temperature alloy, which can be reused many times and is extremely economical.

Description

A superplastic forming device for amorphous spur gears

technical field

The utility model relates to the technical field of bulk amorphous alloy preparation, in particular to a superplastic forming device for amorphous spur gears.

Background technique

The preparation of bulk amorphous alloys has become a hot spot of attention in recent years. Compared with crystalline alloys, the parts formed from bulk amorphous alloys have high precision, high strength, high hardness, high impact toughness and excellent resistance. Corrosive properties. Therefore, gears prepared from bulk amorphous alloys have better performance and longer service life than conventional materials. However, due to the poor plasticity of amorphous alloys at room temperature, it is difficult to machine, which seriously restricts the development of amorphous alloys. The bulk amorphous alloys are thermodynamically metastable materials. When the temperature increases, the amorphous alloys will undergo a glass transition and then crystallize. The temperature interval between the glass transition temperature and the crystallization temperature is called the subcooled liquid phase region. The bulk amorphous alloy exhibits a Newtonian viscous flow state or an approximate Newtonian viscous flow state in the subcooled liquid phase region, showing excellent superplastic properties. Therefore, researchers have prepared many amorphous alloy parts by using the superplasticity of amorphous alloys in the supercooled liquid phase region.

At present, there are many reports on superplastic forming methods of amorphous alloys in China, but few reports on forming devices. The defects of the existing amorphous alloy superplastic forming device are:

1. The die and the die of the current amorphous alloy superplastic forming device are integrated and cannot be disassembled, which is inconvenient to replace the die and also not conducive to meeting the processing requirements of diversified gears; or a silicon die is used, which is a one-time Sexual use, the use of high cost.

2. The heating method of the current amorphous alloy superplastic forming device is mostly to pass current to the mold or insert a heating rod, which is not conducive to the uniform heating of the blank and has the safety risk of leakage.

3. At present, the extrusion rod of the amorphous alloy superplastic forming device is mostly non-removable and has a single function. It cannot process gears with different requirements, which reduces the scope of application.

4. At present, it is difficult to disassemble the amorphous alloy superplastic forming device. Acid is used to corrode the silicon mold during unloading, which is not only costly but also extremely dangerous.

Utility model content

(1) Technical problems solved

Aiming at the deficiencies of the prior art, the utility model provides a superplastic forming device for an amorphous spur gear, which has the advantages of saving cost and improving safety, and solves the problems of high cost and insecurity.

(2) Technical solutions

In order to achieve the above purpose, the utility model provides the following technical solutions: a superplastic forming device for amorphous spur gears, comprising a heating temperature control device, an extrusion die, a detachable extrusion rod and a pad;

The heating and temperature control device is composed of a resistance furnace and a thermocouple. The heating method of the resistance furnace is resistance heating. The thermocouple is used for temperature measurement and temperature control. The resistance furnace is filled with inert gases such as argon and nitrogen for gas heating. Protect;

The extrusion die is composed of an upper module, a shaft sleeve, a detachable movable die and a lower die. The detachable movable die is fixed between the upper die and the lower die by clearance fit. The upper module is fixed up and down with the lower template through pins, the upper module and the lower template are fixed through the side of the shaft sleeve, the extrusion die is integrally fixed on the pad, and the interior of the upper module is A fitting groove is provided, and the two upper modules are closely fitted through the fitting groove, and a disassembly groove is provided on the side of the upper module;

The detachable extrusion rod is composed of a flat-head extrusion rod and a stepped extrusion rod, and the detachable movable die is composed of a small-tooth movable die and a multi-tooth movable die.

Preferably, a discharge hole is opened in the lower template.

By adopting the above scheme, after the superplastic forming is completed, the formed parts can be directly ejected from the discharge hole.

Preferably, an exhaust groove is provided at the bottom of the lower template.

By adopting the above scheme, the exhaust gas is discharged when the exhaust groove is used for the superplasticity experiment.

Preferably, two sides of the cavity of the detachable movable die are provided with threaded holes.

By adopting the above solution, it can be directly screwed out and disassembled after forming.

Preferably, the flat-end extrusion rod is used for forming solid amorphous spur gears.

By adopting the above scheme, the extrusion die and the billet are heated to the amorphous subcooled liquid phase range in the resistance furnace, and under the external pressure, the flat-head extrusion rod descends and extrudes the billet to fill the cavity for one-time forming.

Preferably, the stepped extrusion rod is used for forming hollow amorphous spur gears.

By adopting the above scheme, the extrusion die and the billet are heated to the amorphous subcooled liquid phase in the resistance furnace, and under the applied pressure, the stepped extrusion rod goes down to extrude the billet into the cavity, and the filling and punching are completed at one time. .

Preferably, the forming of the hollow amorphous spur gear also includes the following steps:

S1: Install a flat-head extrusion rod. The extrusion die and the billet are heated to the amorphous subcooled liquid phase in the resistance furnace. Under the external pressure, the flat-head extrusion rod goes down to extrude the billet to fill the cavity, and the filling is completed. type;

S2: Replace the stepped extrusion rod. Under the applied pressure, the stepped extrusion rod descends into the cavity, and extrudes the excess waste to complete the punching.

(3) Beneficial effects

Compared with the prior art, the utility model provides a superplastic forming device for amorphous spur gears, which has the following beneficial effects:

1. The concave die in the present utility model adopts a removable movable concave die, which is different from the previous fixed concave die, which can be directly disassembled and replaced, and can more conveniently form the amorphous spur gears with different numbers of teeth and modules. The experimenter and the practicality are improved. The movable concave die in the utility model adopts a high temperature alloy, which can be reused many times and is extremely economical.

2. The heating method in the utility model adopts resistance heating, and the mold and the blank are directly heated in the resistance furnace, so that the heating of the blank is more uniform and the heating is more stable. At the same time, because the heating wire is inside the resistance furnace, it is safer, and the safety of the device is improved.

3. The extruding rod in the utility model adopts a detachable extruding rod, which is easy to disassemble, and can process amorphous spur gears with different size requirements, which increases the scope of application.

4. The upper module of the present invention is provided with a fitting groove, which can effectively fit the left and right upper modules. A disassembly groove is provided on the side of the upper module, which is conducive to disassembly of the mold and improves the use efficiency of the mold. The lower module in the utility model is made of high-temperature alloy, and a discharge hole is arranged inside, and the amorphous spur gear after superplastic forming can be directly ejected from the discharge hole. , more secure and economical.

Description of drawings

Fig. 1 is the internal tooling diagram of the utility model

2 is a diagram of different movable concave molds in the utility model;

Fig. 3 is the extrusion rod diagram of different sizes in the utility model;

Figure 4 is a diagram of a gear formed in the utility model.

In the picture: 1. Detachable extrusion rod; 2. Upper module; 3. Shaft sleeve; 4. Detachable movable die; 5. Lower template; 6. Pin; 7. Spacer; 8. Resistance furnace; 9. Fitting slot; 10. Removal slot; 11. Thermocouple; 12. Tapped hole; 13. Discharge hole; 14. Exhaust slot; 15. Small tooth movable die; 16. Multi-tooth movable die; 17 , Flat head extrusion rod; 18. Step extrusion rod.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Example 1

A superplastic forming device for an amorphous spur gear, comprising a heating temperature control device, an extrusion die, a detachable extrusion rod 1 and a spacer 7;

The heating and temperature control device is composed of a resistance furnace 8 and a thermocouple 11. The heating method of the resistance furnace 8 is resistance heating. The thermocouple 11 is used for temperature measurement and temperature control. The resistance furnace 8 is filled with inert gases such as argon and nitrogen for gas protection. ;

The extrusion die is composed of an upper module 2, a shaft sleeve 3, a detachable movable die 4 and a lower die plate 5. The detachable movable die 4 is fixed between the upper module 2 and the lower die plate 5 through clearance fit, and the upper module 2 The upper module 2 and the lower template 5 are fixed up and down by the pins 6, and the upper module 2 and the lower template 5 are fixed by the side of the shaft sleeve 3. The extrusion die is integrally fixed on the spacer block 7. The interior of the upper module 2 is provided with a fitting groove 9. The upper module 2 is closely fitted by the fitting groove 9, and the side of the upper module 2 is provided with a disassembly groove 10;

The detachable extrusion rod 1 is composed of a flat-head extrusion rod 17 and a stepped extrusion rod 18 , and the detachable movable die 4 is composed of a small-tooth movable die 15 and a multi-tooth movable die 16 .

In this embodiment, specifically, the lower template 5 is provided with a discharge hole 13 .

In this embodiment, specifically, the bottom of the lower template 5 is provided with an exhaust groove 14 .

In this embodiment, specifically, both sides of the cavity of the detachable movable die 4 are provided with threaded holes 12 .

In this embodiment, specifically, the flat-head extrusion rod 17 is used for forming the solid amorphous spur gear.

In this embodiment, specifically, the stepped extrusion rod 18 is used for forming the hollow amorphous spur gear.

In this embodiment, specifically, the forming of the hollow amorphous spur gear also includes the following steps:

S1: Install the flat-head extrusion rod 17, the extrusion die and the billet are heated in the resistance furnace 8 to the amorphous subcooled liquid phase range, and under the external pressure, the flat-head extrusion rod 17 descends to extrude the billet to fill the cavity , complete the filling;

S2: Replace the stepped extrusion rod 18. Under the applied pressure, the stepped extrusion rod 18 descends into the cavity, and extrudes the excess waste material to complete the punching.

Referring to Figure 1-4, the forming object is the spur gear shown in Figure 4 used on a certain equipment. When forming the solid spur gear shown in Figure 4, first clean and grind the amorphous blank and put it into the cavity, then install the flat head A type extrusion rod 17, the amorphous blank is heated by the resistance furnace 8 and the thermocouple 11, so that the temperature of the gear blank reaches a certain temperature between the supercooled liquid phase region △Tx=Tx-Tg, and the flat head type extrusion rod The temperature of 17 is 7-10°C higher than the billet temperature to prevent solidification due to low temperature during forming, and then under the external pressure, the flat-head extrusion rod 17 descends to extrude the billet and fills the cavity at one time;

When forming the hollow spur gear shown in Figure 4, there are two forming methods;

The first is to first clean and grind the amorphous blank and put it into the cavity, install the stepped extrusion rod 18, and heat the amorphous blank through the resistance furnace 8 and the thermocouple 11, so that the temperature of the gear blank reaches the supercooled liquid. The phase zone △Tx = a certain temperature between Tx-Tg, and the temperature of the stepped extrusion rod 18 is 7-10 °C higher than the billet temperature to prevent solidification due to low temperature during forming. The extrusion rod 18 descends to extrude the blank to fill the cavity, and the filling and punching are completed at one time;

The second type is that the combined extrusion rod can be formed in two steps. In the first step, a flat-head extrusion rod 17 is installed. The extrusion die and the blank are heated in the resistance furnace 8, and the temperature is controlled by the thermocouple 11. In the cold liquid phase area, under the applied pressure, the flat-head extrusion rod 17 descends to extrude the blank to fill the cavity, and the filling is completed; the second step is to replace the stepped extrusion rod 18. Under the applied pressure, the stepped extrusion rod 18 Go down into the cavity, squeeze out the excess waste to complete the punching.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. A superplastic forming device for amorphous spur gear, characterized in that: comprising a heating temperature control device, an extrusion die, a detachable extrusion rod (1) and a pad (7); The heating and temperature control device is composed of a resistance furnace (8) and a thermocouple (11). The heating method of the resistance furnace (8) is resistance heating, and the thermocouple (11) is used for temperature measurement and temperature control. (8) Filling with inert gas for gas protection; The extrusion die is composed of an upper module (2), a shaft sleeve (3), a detachable movable die (4) and a lower die plate (5), and the detachable movable die (4) is fixed by clearance fit Between the upper module (2) and the lower template (5), the upper module (2) is fixed up and down with the lower template (5) by means of pins (6), and the upper module (2) is connected to the lower template (5). The lower template (5) is fixed by the side of the shaft sleeve (3), the extrusion die is integrally fixed on the spacer (7), and the upper module (2) is provided with a fitting groove inside (9), the two upper modules (2) are closely attached through the fitting groove (9), and the upper module (2) is provided with a dismounting slot (10) on the side surface; The detachable extrusion rod (1) is composed of a flat-head extrusion rod (17) and a stepped extrusion rod (18), and the detachable movable die (4) is composed of a small-tooth movable die (15). ) and a multi-tooth movable die (16). 2 . The superplastic forming device for amorphous spur gears according to claim 1 , wherein a discharge hole ( 13 ) is opened in the lower template ( 5 ). 3 . 3 . The superplastic forming device for amorphous spur gears according to claim 1 , characterized in that: the bottom of the lower template ( 5 ) is provided with an exhaust groove ( 14 ). 4 . 4 . The superplastic forming device for amorphous spur gears according to claim 1 , wherein the detachable movable die ( 4 ) has threaded holes ( 12 ) on both sides of the cavity. 5 . 5. A superplastic forming device for amorphous spur gears according to claim 1, characterized in that: the flat-end extrusion rod (17) is used for the forming of solid amorphous spur gears. 6 . The superplastic forming device for amorphous spur gears according to claim 1 , wherein the stepped extrusion rod ( 18 ) is used for forming hollow amorphous spur gears. 7 .

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