A hot push-bending forming method of a wind tunnel scimitar

Abstract

The invention discloses a hot push bending forming method of a wind tunnel scimitar. The forming method includes a. selecting a long steel plate with a rectangular cross-section and a width-to-thickness ratio of 7 to 10; b. installing a cooling water ring and an induction coil matching the cross-sectional size of the steel plate on the pushing machine; c. passing the steel plate through One end of the supercooled water ring and the induction coil is fixed on the push table of the hydraulic propulsion system of the pushing machine, and the other end is fixed on the straight plate clamp of the pushing machine, and the straight plate clamp is connected to the angle radius adjustment rod; d. Induction coil heating Part of the steel plate, when the local temperature of the steel plate reaches the bendable temperature, the hydraulic propulsion system of the pushing machine slowly pushes the steel plate forward, the straight plate clamp rotates around the angle radius adjustment rod, the steel plate is continuously bent at the position of the induction coil, and a flat semicircle is obtained after forming Ring machete. The scimitar forming method of the forming method has the advantages of stable forming, high speed, high precision, good mechanical properties, small blank tonnage required, obvious technical and economic advantages, and has the value of popularization and application.

Description

technical field [0001] The invention belongs to the technical field of wind tunnel equipment, and in particular relates to a hot push bending forming method of a wind tunnel machete. Background technique [0002] In the wind tunnel, the machete is an important part to support the model. In the wind tunnel test, the machete has to bear a large aerodynamic load, and also faces the influence of thermal stress and dimensional changes caused by temperature. Therefore, the machete is required to have the High strength and stiffness, good low temperature dimensional stability and toughness to ensure the correct attitude of the test model and the overall safe and reliable operation of the wind tunnel. For conventional high-speed wind tunnels, the machete is in the shape of a flat semi-circular ring. Generally, 30CrMnSiA forgings are selected, and the upper, middle and lower parts are mechanically screwed together. In comparison, the service conditions of the wide-temperature wind t...

AI Technical Summary

Problems solved by technology

[0003] At present, the machete forming methods all adopt the forging forming method, which has the following disadvantages: (1) the required steel ingots and forming dies are large, resulting in increased manufacturing costs and increased machining allowance; (2) forging There are many fire times, and the problem of coarse grains and mixed crystals is prone to occur; (3) There is a risk of forging cracks in the process of large deformation, and the quality control is difficult; (4) It is difficult to ensure the accuracy of forming dimensions, and it is easy to cause local insufficient dimensions

Images