Measurement of Geometric And Functional Accuracy With ISO 1710 Standard on Feasibility of Welding Bending Test Equipment

Abstract

The bending test tool is a machine used for the bending strength testing process to determine the mechanical properties of metal materials and welded joints. Therefore a machine needs to have machine elements with ideal functional and geometric characteristics. The frame, hydraulics, and specimen mounts are examples of important machine elements in bending test machines. The ISO 1710 standard which is applied in functional and geometric testing of bending test equipment is expected to help analyze the test so that the bending test tool becomes more accurate the test results. The expected accurate category is the size, shape, and pressure applied to the specimen as desired. The accuracy of bending test equipment performance is very important in the manufacturing process to produce high-quality products. Testing includes functional on the frame by comparing actual dimensions and design, welding strength by comparing manual calculations and actual welding tests, and testing cylinder strength by comparing manual calculation of cylinder selection with the actual operation of cylinders on bending test equipment, and geometric testing, namely measuring flatness with deviations. permissible straightness 0.02mm per 1000mm, straightness with an allowable deviation of 0.025mm per 300mm and straightness 85 ° -90 ° in welded joint bending test equipment. The geometrical test results of flatness measurement at datum A using a waterpass are stated not to exceed the permitted limits with a flatness result of 0 °, the alignment test of the frame against datum A using a waterpass is still in accordance with the allowable deviation limits with the test results of the right side 89.7 ° and the left side 89.8 °, the test the alignment of the cylinder with the dial gauge is stated to be still in accordance with the permissible deviation with the results of the X-axis 0 mm and Y-axis 0 mm. measuring ruler with the results of each predetermined measurement point is 800 mm, geometric deviations were found on the flatness test of the specimen jig holder in the longitudinal and transverse directions, namely 0.2 ° or 0.88 mm on the backside of the stand or the third measurement, this is probably due to because the thickness of the diameter welded mount, it is highly recommended to re-weld so that the test results are in accordance with the permitted deviation. The results of the functional testing of the bending test equipment are stated to be able to carry out tests with an accuracy of 95-99% with details of the comparison of the dimensions of the frame with the actual test, the functional testing of the frame based on the strength of the welding and the functional testing of the cylinder is still below the allowable limit.