A connection method of an aero-engine filter screen
An aero-engine and connection method technology, which is applied in welding equipment, plasma welding equipment, welding/welding/cutting items, etc., can solve the problem of self-melting of stainless steel wire into a ball to block mesh holes, incomplete connection of stainless steel wire ends, and assembly accuracy. Difficult to guarantee and other problems, to achieve the effect of good weld consistency, no wire breakage, and lightweight manufacturing
Active Publication Date: 2018-01-16
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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Problems solved by technology
[0003] For the above-mentioned special parts, there are difficulties in welding: 1) It is difficult to guarantee the assembly accuracy when using butt welding; 2) The butt fixture cannot make the ends of each stainless steel wire contact, and there are staggered and gaps at the joints. The places where the stainless steel wires are not well matched are melted to form a similar ball, resulting in connection failure; 3) If lap joints are used, the lap joints must be at least one grid spacing, and one end of the stainless steel wire mesh is inserted into the grid, and then welded , Some of the ends of the stainless steel wire are not fully connected, and the stainless steel wire may self-melt into a ball to block the mesh; 4) Butt joint or lap joint is used, the welding pass rate is low, and the production time is long
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[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0022] Schematic diagram of the expansion of the aero-engine filter, such as figure 1 shown.
[0023] A method for connecting an aero-engine filter screen, comprising the steps of:
[0024] Step 1: Assemble the stainless steel wire mesh with end connection. To ensure the uniformity of the weld seam, when clamping the workpiece on the docking fixture, the joints should be closely aligned and trimmed flat. The end connection extension height is 2.9mm.
[0025] The melting of the wire mesh to form a full and good welded joint requires melting a certain amount of metal. The greater the height of the wire mesh termination, the farther the wire mesh end is from the clamping position of the fixture. During welding, the wire mesh is easily deformed and the wire forks , the wire cannot be connected with the wire; the smaller the height of th...
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The invention discloses a connecting method for an aero-engine filter screen and belongs to the technical field of aero-engines. The connecting method for the aero-engine filter screen is easy to operate and can achieve good welded joint quality. The method includes the following steps that (1) head joint assembly for a stainless steel screen is conducted, and head joint extending height is 2-3 mm; (2) tracing point demonstration is conducted through a robot, a welding track is determined, and the height between a welding gun and the head joint of the screen is controlled to be 1-2 mm; (3) welding process parameters are set, specifically, the welding current is 5-6 A, the welding speed is 8-9 mm / s, the orifice diameter is 0.8-1.0 mm, and plasma gas flow is 0.2-0.3 L / min; (4) micro-beam plasma welding is carried out through automatic welding by the robot; and (5) after welding is finished, filter screen shaping is performed through a forming circular cone.
Description
technical field [0001] The invention belongs to the technical field of aero-engines, in particular to a connection method of an aero-engine filter screen. Background technique [0002] The engine filter screen is welded by stainless steel wire mesh, which is mainly used to filter the impurities in the fuel. The filter material is OCr18Ni9, and the weaving type is plain weave square mesh, the basic size of the mesh is 0.71mm, and the diameter of the stainless steel wire is 0.31mm. [0003] For the above-mentioned special parts, there are difficulties in welding: 1) It is difficult to guarantee the assembly accuracy when using butt welding; 2) The butt fixture cannot make the ends of each stainless steel wire contact, and there are staggered and gaps at the joints. The places where the stainless steel wires are not well matched are melted to form a similar ball, resulting in connection failure; 3) If lap joints are used, the lap joints must be at least one grid spacing, inser...
Claims
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IPC IPC(8): B23K10/02B23K101/22
CPCB23K10/02B23K2101/22
Inventor 宋文清高山曲伸李晓光周冠男
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION