Processing device of crack source bead notch on drop hammer test block

Abstract

A processing device of a crack source bead notch on a drop hammer test block is fixed on a milling machine, and an arbitrary drop hammer test block to be processed is supported by a support plate; a back end of a support bar is pushed downwards by adjusting a bolt, so by the lever principle, a front end of the support bar suspending in the air is propped up from the lower part to the drop hammer test block and lifts the drop hammer test block; and when the top surface of the base material of the drop hammer test block clung upward to a locating block above the support plate, the support bar is fixed; therefore, the height difference between a milling cutter and the top surface of the base material can be adjusted according to the requirement of the distance between the top surface of the base material and its notch plane. Even if other drop hammer test blocks with dimension deviation or of different types are disposed on the processing device, no readjustment of the height difference between the milling cutter and the top surface of the base material is necessary; therefore the invention can achieve precise processing of bead notches, and is rapid for use.

Description

technical field [0001] The invention relates to a mechanical processing device, in particular to a processing device for crack source weld bead notch on a drop weight test block. Background technique [0002] The drop weight test is a test method used to measure the brittle fracture of structural steel, and it is one of the important means for judging the performance of surfacing welds for metals such as nuclear power equipment and components. A single-pass weld bead with a certain length, width and thickness that is longitudinally surfacing on the surface of the base metal of the drop weight test block is called a brittle weld bead. A small physical break defect. Since the drop weight test block represents the material in the final heat treatment state, the cutting and preparation of the base metal and the selection of surfacing electrodes have very high requirements; to use the correct surfacing welding process, except for the selected surfacing welding In addition to go...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a processing device for the notch of the crack source weld bead on the drop weight test block, which can fix different drop weight samples on the same reference plane by using the principle of leverage, and only need to adjust the milling cutter and the sample Once the position of the surface is adjusted, there is no need to re-adjust the position even if it is replaced with a sample with a deviation in size or a different type. Therefore, the processing is accurate and the use is fast, and the problem of difficult processing of the weld bead notch in the drop weight test is solved.

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