Multifunctional mistake-proof fixture for piston finish machining

Abstract

The invention provides a multifunctional mistake-proof fixture for piston finish machining. The multifunctional mistake-proof fixture comprises an upper base and a lower base, the two of which are stacked up and down into a step cylinder; at least three top surface air outlets for detecting whether a piston is mounted are formed at the outer edge of the top surface of the upper base, while bottom surface air inlets for introducing compressed air are formed in the bottom surface of the lower base; air ducts for correspondingly communicating the top surface air outlets with the bottom surface air inlets are formed in the upper base and the lower base; pressure gauges for detecting the pressures in the air ducts are connected to the bottom surface air inlets; side surface air outlets for piston detection are formed in the circumferential side edge of the upper base in positions corresponding to the top surface air outlets, and the side surface air outlets are communicated with the air ducts. The air holes are additionally formed in the circumferential side surface of the upper base of the multifunctional mistake-proof fixture for piston finish machining to effectively prevent outflow of products having abnormal piston inner diameter dimension; as a result, the product quality stability is improved; 100% monitoring of online devices can be realized, manual measurement by the personnel is not needed, and consequently, the labor intensity of the personnel is reduced and the operability is improved.

Description

technical field [0001] The invention relates to the technical field of fine boring of pistons, in particular to a multifunctional error-proof tooling for fine machining of pistons. [0002] Background technique [0003] Piston finishing requires the use of fine boring base tooling. The existing piston fine boring base tooling mainly includes upper and lower bases. There are three detection air holes on the top surface of the upper base, which communicate with the air intake holes of the lower base through air channels. And through three barometers to monitor the air pressure value in the airway, according to the change value and difference of the air pressure value, judge whether the piston is seated or not and whether it is seated correctly [0004] However, with this fine boring base tooling, there is no detection effect on the piston whose inner diameter becomes larger than 0.05mm (the technical tolerance is 0.05mm). When the piston is seated, the adhering point of the ...

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Problems solved by technology

[0004]However, with this fine boring base tooling, there is no detection function for pistons whose inner diameter becomes larger than 0.05mm (technical tolerance is 0.05mm), and the piston will only stop when it is seated. After the close point on the end surface of the mouth is in contact with the detection air hole, it can still be processed normally, resulting in the outflow of products with abnormal inner diameters; during processing, the piston and the tooling fit together, and the aluminum chips in the middle cannot be cleaned automatically, which is prone to accumulation and affects continuous processing; the piston adopts this tooling There is no reverse error prevention during finishing machining. After the piston is seated and reversed, the eccentric direction of the pin hole will be reversed, resulting in abnormal pin hole size during processing, which reduces the product qualification rate

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