subject: Measurement Of Piston Ring With Inclined Plane [print this page] 1 Introduction 1 Introduction
I have a diesel engine research, in the diesel engine using a dual bevel ring as sealing air more, but the gas ring high precision machining, production difficult, very difficult to measure, therefore, needed a simple measuring tools, in order to timely detect data products provide the basis for improvement of production technology.
2 of the original measurement method and its shortcomings
Original measurements are first gas ring in the special fixture to take a sample, ask the bisector of the sample gas through the center ring, and the whole plane and the bisector split; and then test block placed on a large tool microscope measurement methods used to measure threads.
Its shortcomings are:
sampling more complicated;
each measurement time, have destroyed a gas ring product, increased costs;
on the ring size distribution can not be fully measured, can only detect a specific point size.
In view of the existing measurement methods, we designed a new air ring the thickness of a fixed string, the angle of the measuring tools. Using this tool, you can in "MCD" universal micro Meter or "UMN" universal tool microscope, circular end of the period on a short side slope angle of measurement, as shown in Figure 1. Measuring satisfactory, well production sector and welcomed the inspectors.
2 new measurement tools to use
1) fixed to the universal measuring tool for measuring microscope stage;
2) adjust the focus, so that the blade contour image in the vision in the eyepiece when the most clear up;
3) Move XX axis, so that m word lines and cut lines the edges overlapping;
4) mounted on the workpiece to the workpiece and the bottom gently with the blades fitting mouth, while the fixed base plate;
5) reviewed the underside and the blade surface and the workpiece is a good fit;
6) will be riding on the measurement of the workpiece on the block, and fit with the bottom;
7) Measurement of the radial thickness H:
the XX axis coincides with the cylindrical gas ring and a note reading;
the XX axis coincides with the gas ring circle, and note reading;
difference between the two readings shall be the size of the radial thickness of the H;
8) Measurement of the axial thickness of the S:
the YY axis and the gas ring on the left contour overlap, and note reading;
the YY axis coincides with the gas ring on the right profile, and note reading;
difference between the two readings shall be the size of the axial thickness of the S;
9) La trapezoid angle measurement:
to cut feet on the horse block, close to the side of the ramp, mobile m word lines, so that one axis coincides with the knife-edge ruler, note the point of reading;
then cut close to the other side of the slope foot to meter the word line and the blade foot and then coincide, and note the point of reading;
difference between the two readings shall gradient angle La perspective.
3 advantages of the new measurement tools
1) does not require anatomical parts, thereby reducing costs.
2) can be measured by the same ring in the center of a circle of any section.
3) The knife-edge ruler riding block size is measured from the underside of body radius, so the data measured through the center of a circle to ensure the section size.
4 new measurement tools Precautions
1) blade cut through iron requirements and the vertical line.
2) high and riding blade knife edge knife block feet away from the bottom size requirements and are consistent with measurement items radius.
5 pass test tool design, use and advantages
Gas ring production is mass production, have to stand on the measurement instrumentation, process more complex, and the production process, they often need to be size of data to determine the allowances. To this end, we designed a transfer inspection tools, shown in Figure 3.
The field test tool for production use, environmental conditions require low.
5.1 Transfer to use test tools
1) with a universal tool microscope have been certified by the product, as a standard component on the transfer test tools, adjust the dial indicator to zero.
2) transfer installed on the test tools were seized artifacts on display in the dial indicator readings, that is, the angle and thickness of the part of the integrated error.
3) If the dial indicator readings in the tolerance range means that passing the workpiece, if outside the tolerance range, they have the universal tool microscope to re-test.
5.2 The advantages of passing test tools
1) large volume production, test speed, not environmental conditions, improve work efficiency.
2) processing time test, to detect problems, and rework opportunities.
