Device of precisely machining special shaped pin hole and machining method

Abstract

The invention discloses a device of precisely machining a special shaped pin hole and a machining method and relates to the technical field of machining. A fixed bracket is mounted on the right side of a main shaft of a boring mill, a coil bracket is fixed on the fixed bracket, a magnet exciting coil winds the outer side of the coil bracket, an ultra-magnetostrictive rod is fixedly mounted in the coil bracket, a boring bar is fixed at the right end of the coil bracket, a boring cutter is fixed on the right end portion close to the boring bar, an automatic control system is arranged on the side face of the boring bar. The machining method comprises the following steps: S1, casting a workblank; S2, performing quench aging treatment; S3, clamping the workblank; S4, roughly boring; S5, electrifying the magnet exciting coil; S6, adjusting the boring bar to a position of a piston hole; S7, starting the boring mill to feed a piston along the axial direction of the boring hole; S8, finishing hole boring, and retreating the boring bar; and S9, detecting the dimension of the piston hole. According to the device of precisely machining the special shaped pin hole and the machining method disclosed by the invention, the angle of deflection of the boring bar is conveniently adjusted, the precision of the special shaped hole is high, and the degree of automation is high.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a precision processing special-shaped pin hole device and processing method. Background technique [0002] The special-shaped pin hole of the piston can significantly improve the stress distribution of the pin hole seat and increase the service life of the piston. However, due to the particularity of the structure of the special-shaped pin hole of the piston, it poses a problem for its precision machining. At present, in the processing scheme of the special-shaped pin hole, piezoelectric Ceramic materials have fast speed response and sensitive boring bar movement, but when piezoelectric ceramics rotate with the spindle, it is difficult to supply power, and it is difficult to meet the requirements of high-speed boring by using the brush contact method. Giant magnetostrictive materials are used as a new type of intelligent material , has the characteristics of large d...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the difficulty in power supply of the piezoelectric ceramic boring bar, and adopt the brush contact method, which is difficult to meet the defects of high-speed boring. A precision machining special-shaped pin hole device and processing method are designed, and the deflection angle of the boring bar can be adjusted conveniently. The processing precision of special-shaped pin holes is high, and the degree of automation is high

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