Piston-skirt screen printing film thickness measuring instrument and measuring method thereof

Abstract

The invention discloses a piston-skirt screen printing film thickness measuring instrument and a measuring method thereof. The instrument comprises a pedestal, the upper end of the pedestal is provided with a left-right translation slide block and a slide block driving mechanism, the upper end of the left-right translation slide block is connected with a rotary guiding liner seat, the rotary guiding liner seat is provided with a piston connecting fixed rotating shaft, one end of the piston connecting fixed rotating shaft is provided with an adjusting mechanism which includes a telescopic adjustment mechanism and a rotary adjusting mechanism, the other end of the piston connecting fixed rotating shaft is connected with a piston, a slide rail fixed vertical block is arranged on the pedestaland provided with a slide rail, an elevating slide block is arranged on the slide rail and provided with a probe fixing plate, probe fixing plate is used to fix a probe of the thickness measuring instrument, the elevating slide block slides downwardly, and the probe makes contact with the piston skirt portion and measures the thickness of a screen printing film in the contact position.

Description

technical field [0001] The invention relates to a measuring instrument and a measuring method for the film thickness of a piston skirt silk screen printing. Background technique [0002] As one of the key precision components inside the engine, the importance of the piston is unquestionable. Its important characteristic dimensions must be strictly controlled. The thickness of the screen printing film directly affects the precision of the cooperation between the piston and the cylinder, the stability of the working state and the wear resistance. In the past, the technical conditions were backward, and the usual measurement method was to first measure the outer diameter of a batch of pistons at a specified height, make corresponding records and then carry out screen printing, then measure the outer diameter at the specified height, and pass the outer diameter twice. The amount of change can roughly calculate the film thickness on both sides. After the whole process, the wor...

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Problems solved by technology

The correct measurement method should make the center of the coating measuring instrument face the long axis direction of the piston, and cannot form an angle measurement, nor can it deviate from the position measurement, (as shown in the attached manual figure 2 As shown, the first one is the correct measurement method, the second and the third are the wrong measurement methods), if the wrong measurement method is used, the measured results will be distorted, resulting in deviation, so that the internal Purpose of external uniform measurement and acceptance

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