1, subject content and scope of application
1, 1 this specification specifies the sheet metal production use of cold blanking die and bending die acceptance methods and other content.
1,2 This specification applies to the acceptance of outsourcing, outsourcing, self-cooling blanking dies and bending dies.
2, acceptance of the use of measuring instruments
Micrometer (accuracy of 0.01mm, range 25mm), vernier caliper (accuracy of 0.02mm, range 150mm), tape measure (range 3m), the universal angle ruler, the percentage meter (accuracy of 0.01mm, range 20mm).
3, acceptance procedures
Company outsourcing, outsourcing, self-cooling punching dies and bending molds and dies put into use, must be organized by the mold management department of the relevant quality inspection personnel to carry out acceptance, acceptance criteria in accordance with this specification and the relevant "process equipment commissioned the implementation of the card", acceptance of the test piece shall not be less than three pieces.
3,1?Acceptance of cold blanking mold
First, refer to the "process equipment commission card" requirements to measure the size of the convex and concave die to be accepted mold, if there are no special requirements, punching mold convex mold tolerance take 0?~? +0.02mm, the tolerance of concave die of drop mold is 0?~? -0.02mm, convex-concave mold (new mold) with clearance according to Table I selected; and then installed in the corresponding punch mold and test piece and processing, check the test piece processing to determine whether the acceptance of the mold to be qualified.
3, 2? Bending mold acceptance
First of all, refer to the "process equipment commission card" data to measure the relevant dimensions of the mold to be accepted, in addition to the "process equipment commission card" special requirements of the dimensions of the mold work and the installation of the dimensions should be consistent with the "various
The tolerance of the product parts are not noted tolerance dimensions of the tolerance requirements, and then install the mold on the bending machine to complete the knife and tighten the mold mounting screws, and the die. Tighten the mold mounting screws, the percentage meter to measure the straightness of the upper and lower mold, the requirements are not greater than 0.03mm / m, and finally bend the test piece and measure the angle value, the length of the test piece is not less than 2,500mm (to be accepted by the length of the mold is greater than 2,500mm), the measurement point selection: both ends of the test piece, from the ends of the 300mm respectively, from the ends of the 800mm respectively, the center of the test piece; the measurement point selection of which Three to seven, after completing the measurement, the data will be filled in the "process equipment acceptance card" in the relevant column.
The angle of the specimen is qualified or not in accordance with Table II data evaluation.
3, 3?Stamping mold acceptance
Stamping mold test piece angle qualified or not in accordance with Table III data evaluation.