ZH-GCPH-6 type "tolerance fit" teaching showcase 1. Overview "Tolerance fit" showcase is an important technical requirement on the design drawings of mechanical parts and is an important part of the static and dynamic geometric accuracy of mechanical products. With the development of science and technology and the improvement of production level, the geometric accuracy of mechanical products has also been put forward higher and higher requirements, geometric accuracy has formed an independent technical discipline, and is well known by academia and engineering technology Zhishi attaches great importance.
Showcase size: 1200 × 430 × 1800m
Second, the display cabinet details the serial number and name of the model content in the display cabinet. The first cabinet: the use of measuring tools with depth vernier calipers; height vernier calipers; outer diameter micrometers; depth vernier calipers; depth micrometers; external calipers; internal calipers; plug gauges; spirit level; Thick and thin gauge.
Cabinet 2: Straightness and flatness straightness (1 given direction) 3 pieces; straightness (2 in the given orientation) one direction; straightness (two directions perpendicular to each other); straightness (in any direction) 2; flatness 2; flatness error discrimination method (1) three highs and one low; (2) two highs and two lows; (3) two highs and one low;
Straightness error discrimination method (in a given plane); straightness error discrimination method (given direction); straightness error discrimination method (arbitrary direction) 3;
Cabinet 3: Roundness and cylindricity and line profile 2 roundness; cylindricity; line profile 2; roundness error judgment method; least square center; minimum circumscribed circle center 2; maximum inscribed circle center 2 pieces; minimum roundness area;
Cabinet No. 4: plane profile degree and parallelism and perpendicularity plane profile degree; parallelism (1) one direction a face to face; parallelism (1) one direction b line to face; parallelism (1) one direction c face to line; Parallelism (1) one direction d line to line 2 pieces; parallelism (2) two directions perpendicular to each other; parallelism in any direction; perpendicularity one direction a face to face; perpendicularity one direction b line to face; perpendicularity One direction c faces the line; the perpendicularity one direction d line-to-line two pieces; the perpendicularity (2) two directions perpendicular to each other; the perpendicularity in any direction (line-to-face); the perpendicularity error discrimination method.
Fifth cabinet: inclination and coaxiality inclination a face to face in the given direction; inclination b face to the line in the given direction; inclination c line to line 3 pieces in the given direction; inclination at any Opposite the line in the direction; 3 pieces of coaxiality.
Cabinet 6: Symmetry and position and beating symmetry a face to face; symmetry b line opposite to 2 pieces; symmetry face to line; symmetry line to line; position degree to 1 point position degree 2 pieces; position degree to 2 lines Positional degree 2 pieces; positional degree 2 in any direction 2 pieces; face positional degree; compound position degree; circle runout 1 radial circle runout 2 pieces; oblique circle runout 2 pieces.

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