The technical requirements for the assembly of automotive parts gage
The technical requirements for the assembly of automotive parts gage, mainly including the appearance of the gage, installation dimensions and overall assembly accuracy and other aspects of the content
The appearance of the inspection tool requirements
(1) automotive inspection tool parts non-machined surface without oxidation, rust, lack of flesh, sand eyes, shrinkage and other defects
(2) automotive inspection tool parts surface knife pattern requirements consistent, orderly, surface roughness in accordance with the drawing standards
Auto parts inspection tool
(3) automotive inspection tool parts all chamfering best to mechanical chamfering (except for special can not be processed), the same batch of parts on the same size chamfering and rounding dimensional tolerances refer to IT14; except for special requirements, inspection tool appearance of acute angle chamfering blunt 1X45 degrees.
(4) for complex inspection tool, more parts, assembly of parts shall have steel or mechanical automatic printing mark (pneumatic marking or laser engraving), general parts non-working surface with obvious part number or component number information, easy for the clampers to identify, to avoid the misassembly or omission of similar parts.
(5) parts assembly must use brass rods, rubber hammers and other soft material tools to avoid touching parts, assembly of the thread tightening torque in strict accordance with the value of the drawing, part of the precision structure when necessary, to ensure that the installation of a reliable connection structure before formal installation.
(6) Before and after assembly of the checker bracket, shape and other edges should be free of obvious burrs, sharp corners need to be chamfered blunt, to avoid operators scratching their bodies when using. The installation reference surface should ensure smooth, flat, no rust, no bruises and obvious surface processing defects, etc. The head of all screws, the end of the cylindrical pin can not be higher than the installation plane, generally should be lower than the installation plane more than 1MM
a, the inspection tool parts of the material, shape and size processing accuracy, surface roughness and heat treatment and other technical requirements, should be in line with the design requirements of the drawings, the working surface of the parts do not allow cracks and mechanical damage and other defects
b, considering the safety and appearance factors, the inspection tool protrudes from the table part, exposed moving parts and pipelines, etc. should have a protective cover.
Installation size requirements
(1) Inspection tool assembly accuracy requirements
Positioning device to ensure accurate and reliable positioning, assembled gage, must ensure the relative accuracy of the parts of the gage, the parts of the fit should meet the requirements of the specified grade, the gap should be uniform
Inspection tool assembly accuracy is generally determined by the designer according to the technical requirements of the inspection tool, batch size and other factors, mainly in the following areas.
1) Position accuracy, mainly the position of each inspection hole, positioning hole and the reference between the position degree
(2) motion accuracy, mainly linear motion accuracy, circular motion accuracy and transmission accuracy, such as the detection pin and guide bush movement flexibility, etc.
3） Fit accuracy, mainly refers to the fit relationship between the parts that fit each other is in line with the technical requirements
(4) Contact accuracy, mainly the consistency of the contact state before the opening and CUBing parts coincide