A controllable atmosphere protection device for laser rapid forming of titanium alloy parts

Abstract

The invention discloses a controllable atmosphere protection device for laser rapid prototyping of titanium alloy parts. The device is composed of a rigid sealed box body and a flexible bag-type sealed cover. The rigid sealed box body is provided with an inflation port and an exhaust port. There are valves on the inflation port and the exhaust port respectively; during the pumping process of the device, the air in the cavity is drawn out along with the exhaust port, and the flexible bladder-type sealing cover will gradually seal with the inner wall and cavity of the rigid box under the action of negative pressure. The bottom is close to the inner wall and the bottom of the cavity of the rigid sealed box, so as to discharge all the air in the cavity; then close the valve on the suction port, open the valve on the inflation port to fill in the required protective gas, and in the process of filling the protective gas During the process, the flexible bladder sealing cover is raised and inflated accordingly, so that the required protective atmosphere is formed in the cavity; the thickness of the flexible bladder sealing cover is 0.1 mm to 100 mm; the thickness of the rigid sealing box is 0.5 mm ~ 2m.

Description

technical field [0001] The invention relates to a smelting equipment, more particularly, to a controllable atmosphere protection device for laser rapid forming of titanium alloy parts. The device can be used for atmosphere protection in the laser rapid prototyping manufacturing and repairing process of large titanium alloy parts in advanced defense weapons and equipment such as aircraft, engines, missiles, rockets, spaceships and ships. Background technique [0002] The amount of large integral titanium alloy structural parts has become one of the important symbols to measure the technological advancement of advanced national defense equipment such as new generation fighter jets. However, the manufacturing technology of large titanium alloy structural parts of aircraft is very difficult. Using traditional manufacturing technology requires super-large forging equipment, manufacturing of large-scale forging molds, and preparation of super-large forging blanks. Moreover, there ...

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Problems solved by technology

However, the manufacturing technology of large titanium alloy structural parts of aircraft is very difficult. Using traditional manufacturing technology requires super-large forging equipment, manufacturing of large-scale forging molds, and preparation of super-large forging blanks. Moreover, there are many processes, large amount of machining, low material utilization rate, and low cost. high, long cycle

[0003] At present, there is no large-scale hydraulic forging industrial equipment of more than 35,000 tons in my country, and the manufacturing technology and capacity of large-scale integral titanium alloy structural parts are seriously insufficient (the maximum projected size of titanium alloy die forgings that can be produced at present is less than 0.8m 2 ), does not yet have the manufacturing capacity of large-scale overall titanium alloy structural parts that are urgently needed for the development and production of major national defense equipment such as new-generation fighter jets and large aircraft

This kind of protective device usually has a complex structure, bulky and heavy box body, and the box body is usually welded or bolted with thick stainless steel plates with reinforcing ribs; the sealing requirements for the connection and joint parts of the box body are extremely high, and the service life of the connecting seals It is short and needs to be replaced in a short period of time; the internal size of the box is small, which is not suitable for laser rapid prototyping of large parts; the supporting vacuum pumping equipment is complicated, which requires extremely high performance of the vacuum pump, and the vacuum pumping cycle is long; the overall manufacturing of the system and high operation and maintenance costs; observation and operation are not convenient and flexible enough and many other deficiencies

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