TH37753A - Methodology and Preforms for Metal Tube Liquid Forming - Google Patents

Abstract

DC60 (17/07/41) Methodology and Finishing Machine for Liquid Metal Tube Forming This includes a preliminary process of extending the metal tube on an axial part longer than the length of the extension of the The end product when measured in the axial direction of the metal tube; And compression in the preliminary extension as Say in the axial direction of the metal tube To form the shape of the extension of the final product In a manner consistent with the methodology and success of this invention Resistance due The friction between the pipe material and the handling tool can be reduced, and the pressure inside the metal pipe can be reduced during the stretching process. In addition The cost of producing metal molds is lower. And the tolerance of the material will be improved even further. Methodology and Preforms for Metal Tube Liquid Forming This includes the procedure: Initially stretching the metal tube on an axial part longer than the length of the extension of the The end product when measured in the axial direction of the metal tube; And compression in the preliminary extension as Say in the axial direction of the metal tube To form the shape of the extension of the final product In a manner consistent with the methodology and success of this invention Resistance due Friction between the material of the pipe and Handling tools can be mitigated and, in addition, the pressure inside the metal tubes can be reduced during the stretching process. In addition The cost of producing metal molds is lower. And the material tolerance will be improved:

Claims (4)

1. Methodology for forming metal pipes with liquid Where parts of the metal tube are enlarged Released by applying the internal pressure exerted by the fluid contained in the metal tube. In combination with pipe compression Axial metal It consists of the process of initially expanding the metal tube on one part. Along the axis which is longer than the length of the extension of the final product when measured in the axial direction Of metal pipes with fluid pressure exerted on the inside of the metal tube and compressive pressure acting in the direction The axial path of the pipe, which moves the material of the pipe in the non-enlarged part initially. Flows into the preliminary expansion and compression of the part through the expansion in Preliminary in the axial direction of the metal pipe To shape the section through the expansion of the final product. 2. Methodology according to claim 1, where the compressive pressure in the axial direction of the pipe is exerted on the section Through the enlargement formed by initial expansion At the same time, the axial pressure of the pipe is applied simultaneously to the metal pipes at each end of the pipe to make The compression is performed so that the compression rate is within the section through the expansion in a horizontal direction. The core of the metal tube is equal to the compression rate exerted on each end of the metal tube. 3.Finished machines for liquid metal tube forming include Type hammer holder A separate piece with holes through one pair of hollow cylindrical outer studs inserted in a sliding motion. Got into through holes from both ends of through holes And a pair of studs inside which insert In the form of sliding into the corresponding outer studs In order to compress the axial metal pipe, which has been inserted into the studs from both ends of the metal tube. Where the path through Hydraulic fluids have been formed into the inner studs. And a device to make the rods move A pair of forwards-backwards have been provided for making the inner rods and The outer pegs move forwards or backwards independently of each other in the axial direction of the metal tube. 4. The machine completes claim 3, where the device makes the bar move forward-backward. Includes an inner piston for making the inner pegs forward or reverse in a direction. Along the axis of the metal tube And cylindrical outer pistons for making the outer hammer rods Forwards or backwards in the axial direction of the metal pipe. With the inner piston has been provided Inside piston outside cylinder And the path through the hydraulic fluid has been formed Up in the inner piston In such a way that it can be connected to the passage through which hydraulic fluid Has been formed in the studs inside