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A high-strength corrosion-resistant explosion-proof pneumatic cylinder and its preparation method

A pneumatic cylinder and corrosion-resistant technology, applied in the field of high-strength corrosion-resistant explosion-proof pneumatic cylinder and its preparation, can solve the problems of easy existence of holes, porosity, segregation, affecting the internal structure and mechanical properties of the final product, etc. Defects, dense organization, and the effect of improving mechanical properties

Active Publication Date: 2019-11-22
NINGBO JIALILAI MACHINERY MFR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is easy to form in a turbulent flow mode, so the formed parts are prone to defects such as holes, looseness, and segregation, which will affect the internal structure and mechanical properties of the final product

Method used

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  • A high-strength corrosion-resistant explosion-proof pneumatic cylinder and its preparation method
  • A high-strength corrosion-resistant explosion-proof pneumatic cylinder and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0025] The components and weight percentages of the aluminum alloys used in the high-strength corrosion-resistant explosion-proof pneumatic cylinders in Examples 1 to 3 are shown in the following table:

[0026] Table 1: Components and weight percentages of aluminum alloys used in pneumatic cylinders in Examples 1 to 3

[0027]

Embodiment 4

[0029] The preparation method of the high-strength corrosion-resistant explosion-proof pneumatic cylinder in this embodiment comprises the following steps:

[0030] (1) Smelting molten aluminum: prepare raw materials according to the aluminum alloy in Example 1, melt the raw materials into molten aluminum, add additives to the molten aluminum, and stir evenly.

[0031] (2) Die-casting molding: the aluminum liquid is made into semi-solid droplets with a particle size distribution of 2-6 μm by spraying method to form a semi-solid slurry at a temperature of 610°C, and the semi-solid slurry is kept warm and immediately heated at a temperature of 610°C The lower injection is injected into the extrusion die-casting machine, and the finished product of the pneumatic cylinder is obtained by die-casting. The injection speed is 0.4m / s, the pressure of pressurized casting is 60MPa, and the pressurization time is 50s.

[0032] (3) Post-treatment: Cool the pressurized casting to 520°C for ...

Embodiment 5

[0034] The preparation method of the high-strength corrosion-resistant explosion-proof pneumatic cylinder in this embodiment comprises the following steps:

[0035] (1) Smelting molten aluminum: prepare raw materials according to the aluminum alloy in Example 1, melt the raw materials into molten aluminum, add additives to the molten aluminum, and stir evenly.

[0036] (2) Die-casting molding: the aluminum liquid is sprayed into semi-solid droplets with a particle size distribution of 2-6 μm to form a semi-solid slurry at a temperature of 590°C, and the semi-solid slurry is immediately pressed at a temperature of 590°C Injection into extrusion die-casting machine, die-casting molding, that is, the finished product of the pneumatic cylinder, the injection speed is 0.3m / s, the pressure of pressurized casting is 80MPa, and the pressurization time is 30s.

[0037] (3) Post-treatment: cool the pressurized casting to 525°C for solution treatment for 2 hours, then cool down to 250°C ...

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Abstract

The invention relates to a high-strength and corrosion-resistant explosion-proof pneumatic cylinder and a preparation method thereof, and belongs to the technical field of machines. The explosion-proof pneumatic cylinder is prepared from an aluminum alloy, and the aluminum alloy is prepared from the following components in percentage by weight: 7.5-9.5% of Si, 3.0-4.0% of Cu, less than or equal to0.50% of Mn, 0.40-0.60% of Mg, less than or equal to 0.10% of Fe, less than or equal to 0.5% of Ni, less than or equal to 2.9% of Zn, less than or equal to 0.10% of Pb, less than or equal to 0.15% ofSn, 0.05-0.12% of C, 0.03-0.08% of Ta, 0.1-0.2% of additives and the balance of Al. The explosion-proof pneumatic cylinder is prepared in the mode that semi-solid slurry is prepared from molten aluminum in a sprayed mode and then subjected to die-casting. Air entrapment is not liable to occur in the preparation process of the high-strength and corrosion-resistant explosion-proof pneumatic cylinder, the structural defects inside a prepared product are less, and the mechanical property is high.

Description

technical field [0001] The invention belongs to the technical field of machinery, and relates to a high-strength corrosion-resistant and explosion-proof pneumatic cylinder and a preparation method thereof. Background technique [0002] The pneumatic cylinder is a pneumatic actuator that converts pneumatic energy into mechanical energy and performs linear reciprocating motion (or swing motion). It has simple structure and reliable operation. When using it to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap, and the motion is stable, so it is widely used in various mechanical pneumatic systems. The output force of the pneumatic cylinder is proportional to the effective area of ​​the piston and the pressure difference on both sides; the pneumatic cylinder is basically composed of cylinder barrel and cylinder head, piston and piston rod, sealing device, buffer device and exhaust device. Pneumatic cylinders are often made...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02B22D17/00C22C1/02
CPCB22D17/007C22C1/026C22C21/02
Inventor 金华君顾成锋
Owner NINGBO JIALILAI MACHINERY MFR
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