th800系列数字式韦氏硬度计.pptVIP

TIME TH800 Series Digital Webster Hardness Tester Outline Introduction to Webster Hardness Testing Method Analog Webster Hardness Tester Digital Webster Hardness Tester Webster Hardness Tester Originally produced since 1932 Applications Identifies heat-treated from nonheat-treated parts. Provides correlation between a bench mounted hardness tester and the production line. Segregates materials in stock. Differentiates between soft or work-hardened material. Identifies parts made from improper or substandard alloys. Checks for proper heat-treatment response. Useful in conjunction with stationary laboratory hardness testers. Gives a rapid 100% check on parts which would consume many man hours with slower operating test equipment. Can be used on assemblies that cannot be brought to the labs. Working Principle Static Hardness Testing Analog Webster Hardness Tester Essential design elements remain unchanged for 70+ years Indication of Webster Hardness Testing: Load spring, penetrator and anvil Pliers-like frame-and-handle structure Mechanical device measuring the depth of dent Dial indicator assembly Shortcoming Must keep griping force when reading test value Pointer of the dial indictor drifts during testing Right hand use only Testing locations limited to the direct visibility of indicator during testing process Dial indicator introduces vision error Steel penetrator easily wears Have to write the values one-by-one in a piece of paper if testing records are needed, thus not suitable for quality control, e.g., SPC Digital v.s. Analog Illustration of Digital Webster Hardness Tester Digital Webster Hardness Tester The first Digital Webster Hardness Tester in the world Design Advanced micro linear sensor for measuring the depth of dent LCD displayer Use the same type of load spring, penetrator and anvil Remain the frame-and-handle structure Features Testing value keep display after the griping force is released Peak-value auto-catching ensures testing precisi