Forming method for high-temperature alloy sine bellows spring

Abstract

The invention belongs to a thermal forming technique and relates to the improvement of a manufacture method for a high-temperature alloy sine bellows spring, which comprises the following forming steps of punching and cutting spring blank, mechanically deforming the spring blank, and carrying out solid solution and aging thermal treatment to the spring blank together with a thermal treating mould. The invention solves the problem that the shape of the bellows spring can not be kept after the bellows spring is machined and formed, ensures the design requirements of physical dimensions and waveshapes of the bellows spring, and improves the machining qualified rate of the bellows spring.

Description

technical field

[0001] The invention belongs to thermoforming technology and relates to the improvement of the manufacturing method of the high-temperature alloy sinusoidal wave corrugated spring. Background technique

[0002] The superalloy sine wave corrugated spring is a special-shaped spring, which is made of GH4169 superalloy plate. The ripple spring is circular, see figure 1 , after its torus is unfolded, it presents a sine wave waveform of 3 to 5 cycles, and its thickness is 0.1±0.05mm. The existing forming method is: using a stamping die to form by cold stamping, followed by heat treatment to eliminate internal stress and stabilize dimensions. However, for high-temperature alloy plates with a wall thickness of only 0.1±0.05mm, it is very difficult to maintain the shape after cold forming, which cannot meet the requirements of the drawing. Contents of the invention

[0003] The purpose of the present invention is to propose a forming method for a high-temperature...

Examples

Embodiment 1

[0035] Five planar spring rings that have been punched are loaded into a tooling with a ring cavity with 3 cycles of sine waves, and the surface of the tooling is thermally sprayed with 10 μm zirconia coating, and vacuum heat treatment is carried out:

[0036] 1.1. Place a thermocouple on the upper and lower surfaces of the heat treatment tool; when measuring temperature, record the temperature value of the heat treatment tool when the indication values ​​of the two thermocouples reach the predetermined temperature;

[0037] 1.2. Lock the furnace door and carry out vacuuming, and the vacuum in the furnace is pumped to 6×10 -2 Pa;

[0038] 1.3. Raise the temperature, raise the temperature of the heat treatment tool to 800±10°C at a rate of 10°C / min, divide the pressure to 6Pa, then raise the temperature of the heat treatment tool to 970±10°C at a rate of 6°C / min, and keep it warm for 60 minutes;

[0039] 1.4. Cooling, turn on the argon gas and fan, and cool the heat treatment ...

Embodiment 2

[0047] 10 punched planar spring rings are put into the tooling with 3-period sine wave annular cavity, and the surface of the tooling is thermally sprayed with 10μm zirconia coating, and vacuum heat treatment is carried out:

[0048] 2.1. Place a thermocouple on the upper and lower surfaces of the heat treatment tool; when measuring temperature, record the temperature value of the heat treatment tool when the indication values ​​of the two thermocouples reach the predetermined temperature;

[0049] 2.2. Lock the furnace door and carry out vacuuming, and the vacuum in the furnace is pumped to 6×10 -2 Pa;

[0050] 2.3. Raise the temperature, raise the temperature of the heat treatment tooling to 800±10℃ at a rate of 10℃ / min, divide the pressure to 6Pa, then raise the temperature of the heat treatment tooling to 970±10℃ at a rate of 6℃ / min, and keep it warm for 60min;

[0051] 2.4. Cooling, turn on the argon gas and fan, and cool the heat treatment tooling to 60°C;

[0052] 2.5. ...

Embodiment 3

[0059] Five planar spring rings that have been punched are loaded into a tooling with a ring cavity with 4 cycles of sine waves. The surface of the tooling is thermally sprayed with a 20 μm zirconia coating and vacuum heat treated:

[0060] 3.1. Place a thermocouple on the upper and lower surfaces of the heat treatment tool; when measuring temperature, record the temperature value of the heat treatment tool when the indication values ​​of the two thermocouples reach the predetermined temperature;

[0061] 3.2. Lock the furnace door and carry out vacuuming, and the vacuum in the furnace is pumped to 6×10 -2 Pa;

[0062] 3.3. Raise the temperature, raise the temperature of the heat treatment tool to 800±10°C at a rate of 10°C / min, divide the pressure to 6Pa, then raise the temperature of the heat treatment tool to 970±10°C at a rate of 6°C / min, and keep it warm for 60min;

[0063] 3.4. Cooling, turn on the argon gas and fan, and cool the heat treatment tooling to 60°C;

[0064...

technical field

[0001] The invention belongs to thermoforming technology and relates to the improvement of the manufacturing method of the high-temperature alloy sinusoidal wave corrugated spring. Background technique

[0002] The superalloy sine wave corrugated spring is a special-shaped spring, which is made of GH4169 superalloy plate. The ripple spring is circular, see figure 1 , after its torus is unfolded, it presents a sine wave waveform of 3 to 5 cycles, and its thickness is 0.1±0.05mm. The existing forming method is: using a stamping die to form by cold stamping, followed by heat treatment to eliminate internal stress and stabilize dimensions. However, for high-temperature alloy plates with a wall thickness of only 0.1±0.05mm, it is very difficult to maintain the shape after cold forming, which cannot meet the requirements of the drawing. Contents of the invention

[0003] The purpose of the present invention is to propose a forming method for a high-temperature...

Examples

Embodiment 1

[0035] Five planar spring rings that have been punched are loaded into a tooling with a ring cavity with 3 cycles of sine waves, and the surface of the tooling is thermally sprayed with 10 μm zirconia coating, and vacuum heat treatment is carried out:

[0036] 1.1. Place a thermocouple on the upper and lower surfaces of the heat treatment tool; when measuring temperature, record the temperature value of the heat treatment tool when the indication values ​​of the two thermocouples reach the predetermined temperature;

[0037] 1.2. Lock the furnace door and carry out vacuuming, and the vacuum in the furnace is pumped to 6×10 -2 Pa;

[0038] 1.3. Raise the temperature, raise the temperature of the heat treatment tool to 800±10°C at a rate of 10°C / min, divide the pressure to 6Pa, then raise the temperature of the heat treatment tool to 970±10°C at a rate of 6°C / min, and keep it warm for 60 minutes;

[0039] 1.4. Cooling, turn on the argon gas and fan, and cool the heat treatment ...

Embodiment 2

[0047] 10 punched planar spring rings are put into the tooling with 3-period sine wave annular cavity, and the surface of the tooling is thermally sprayed with 10μm zirconia coating, and vacuum heat treatment is carried out:

[0048] 2.1. Place a thermocouple on the upper and lower surfaces of the heat treatment tool; when measuring temperature, record the temperature value of the heat treatment tool when the indication values ​​of the two thermocouples reach the predetermined temperature;

[0049] 2.2. Lock the furnace door and carry out vacuuming, and the vacuum in the furnace is pumped to 6×10 -2 Pa;

[0050] 2.3. Raise the temperature, raise the temperature of the heat treatment tooling to 800±10℃ at a rate of 10℃ / min, divide the pressure to 6Pa, then raise the temperature of the heat treatment tooling to 970±10℃ at a rate of 6℃ / min, and keep it warm for 60min;

[0051] 2.4. Cooling, turn on the argon gas and fan, and cool the heat treatment tooling to 60°C;

[0052] 2.5. ...

Embodiment 3

[0059] Five planar spring rings that have been punched are loaded into a tooling with a ring cavity with 4 cycles of sine waves. The surface of the tooling is thermally sprayed with a 20 μm zirconia coating and vacuum heat treated:

[0060] 3.1. Place a thermocouple on the upper and lower surfaces of the heat treatment tool; when measuring temperature, record the temperature value of the heat treatment tool when the indication values ​​of the two thermocouples reach the predetermined temperature;

[0061] 3.2. Lock the furnace door and carry out vacuuming, and the vacuum in the furnace is pumped to 6×10 -2 Pa;

[0062] 3.3. Raise the temperature, raise the temperature of the heat treatment tool to 800±10°C at a rate of 10°C / min, divide the pressure to 6Pa, then raise the temperature of the heat treatment tool to 970±10°C at a rate of 6°C / min, and keep it warm for 60min;

[0063] 3.4. Cooling, turn on the argon gas and fan, and cool the heat treatment tooling to 60°C;

[0064...

Images