1 Pre-process/raw material quality standards
1.1 Check whether the quantity and external dimensions of the materials are consistent with the drawings, details, and process cards.
1.2 The surface of the workpiece to be machined should not be bumped, deformed, or rusted, especially the surface of the workpiece that has been sprayed.
1.3 The steel bending and twisting index inspection should meet the corresponding national standards. If the project has special requirements, the corresponding leveling and straightening should be done to meet its requirements.
2 Production and processing technology quality standards
2.1 In order to ensure the accuracy of the blanking size, the support frame must be adjusted to the height of the worktable, and adjusted by the gap between the profile and the surface of the worktable.
2.2 Band saw cutting processing range: the maximum cross-sectional width and height should be processed within the range of the band saw.
2.3 There must be sufficient manpower during processing and loading, and a special person must be instructed to prevent injuries and equipment damage.
2.4 Inspect strictly in accordance with the "three inspections" procedures. Mass production can only be carried out after the first piece has passed the inspection.
2.5 Pay attention to the burrs of the sawed parts. When the burrs are large, sharpen them again or replace the saw blade.
2.6 Allowable deviation of band saw cutting
Cutting length <3000mm, allowable error ±1.0mm;
Cutting length ≥3000mm, allowable error ±0.5mm;
Cutting height ≤200mm, allowable error of vertical angle ±0.5°;
The height of the blanking material is more than 200mm, and the allowable error of the vertical angle is ±0.3°.
3 Quality standards after the process is completed
3.1 After the process is completed, when the product is placed on the ground, a wooden square or section steel must be placed underneath, and the height of the wooden square or section steel must be the same. The principle of skidding square or section steel is: the products are properly spaced, placed neatly and orderly, and are suitable for rope or forklift operation.
3.2 The appearance quality of the product meets the requirements of the corresponding drawings, and the flash and burrs are removed in time.
3.3 After the product is processed and meets the above requirements, the quality inspector shall report to the final inspection, and the quality inspector shall confirm that it is qualified and the procedure card and the handover sheet can be stamped before the next order can be transferred.
