Forming method of solid rocket motor case

An engine casing and molding method technology, which is applied in the furnace type, heating/cooling equipment, furnace and other directions, can solve the problems of the thickness of the wall of the engine casing, affecting the coordination between the projectile and the carrier, and increasing the weight of the projectile. High accuracy of housing shape and position tolerance, avoiding the effect of low material utilization

Active Publication Date: 2021-05-07
湖北三江航天江北机械工程有限公司
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Problems solved by technology

Traditional ultra-high-strength steel such as D406A, 30Cr3 and other materials have become less and less satisfactory, mainly in the following aspects: First, the material strength level is about 1600MPa, resulting in thicker engine shell wall thickness and increased projectile weight; Second, ultra-high-strength steels such as D406A and 30Cr3 need to be quenched and strengthened by high-temperature heat treatment, and the thin-walled shell has large deformation, which affects the cooperation between the projectile body and the carrier

Method used

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  • Forming method of solid rocket motor case
  • Forming method of solid rocket motor case
  • Forming method of solid rocket motor case

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Embodiment 1

[0087] This example discloses a preparation process for a solid motor casing with a specific size. Its external dimensions are ￠430mm×3050mm, and the wall thickness of the cylinder section is 1.9mm. The specific preparation process is as follows:

[0088] 1) Blank forging and machining;

[0089] Open-hole forging is adopted for bar stock. The specific open-hole forging process includes firstly punching ￠90mm in the center of the bar stock, and then forging and rolling into required ring parts. The starting forging temperature is 1030°C, and the final forging temperature is 850°C. Then rolled into a ring with a wall thickness of 7.5 mm, the solution heat treatment of the ring is twice, the first solution heat treatment temperature is 930 ° C, the heat preservation T1 = 55 min, the second solution heat treatment temperature is 830 ° C, Insulation T2 = 60min;

[0090] Then the ring parts are processed into front joints, rear joints, front skirts, rear skirts, front sliders and r...

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Abstract

The invention discloses a molding method for a solid rocket motor casing, which belongs to the technical field of medium-sized solid rocket motors. It includes dividing the engine casing into front joints, rear joints, front skirts, rear skirts, front sliders, rear sliders, front butterfly bodies, rear butterfly bodies, cylinder one and cylinder two parts, and then Each component is welded and formed at the corresponding position to form the engine casing, and the material of each component is C250 maraging steel. The engine casing designed by the present invention is made of C250 maraging steel, and high-temperature heat treatment is avoided during specific preparation, and the shape and position tolerance accuracy of the casing is higher; at the same time, the specific process includes ellipsoid deep drawing forming, and high-resistance maraging steel cylinder Spinning forming and other processes solve the problem of difficulty in deep drawing and forming of this material, and at the same time avoid the technical defect of low material utilization rate caused by the traditional overall forging processing scheme.

Description

technical field [0001] The invention relates to a processing method for a solid rocket motor combustion chamber casing, which belongs to the technical field of medium-sized solid rocket motors, in particular to a molding method for a solid rocket motor casing. Background technique [0002] The air-to-ground missile weapon system has developed rapidly in recent years, and it launches missiles from aircraft to attack ground (water) surface targets. It is one of the main equipments for the air force to carry out assaults in the hole, and it is equipped on aircraft such as strategic bombers, fighter bombers, attack aircraft, fighter planes, armed helicopters and anti-submarine patrol aircraft. Compared with aerial bombs, aerial rockets and other weapon systems, air-to-ground bombs have strong maneuverability and good concealment, and can be launched from outside the range of enemy air defense weapons, which can reduce the threat of ground air defense firepower to carrier aircraf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00C21D1/00C21D9/00C21D9/40B21K29/00B21J5/00
CPCB21J5/002B21K29/00B23P15/008C21D1/00C21D9/0068C21D9/40
Inventor 杨江波刘进曾永春付德生
Owner 湖北三江航天江北机械工程有限公司
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