Online inspection of machine tools provides better process control for mold manufacturing


The strain gauge probe is testing the injection mold of a computer mouse. This strain gauge testing technique overcomes the disadvantage of measuring unevenness with conventional contact-trigger probes because parts with complex geometries need to be approached from all directions. This omni-directional probe maintains the machining accuracy of Western Industrial Tooling in Redmond, Washington, between +0.0000 and -0.013 mm, and produces parts with a precision that meets 25% of customer tolerances. Drive mechanisms that are fast, labor-saving, and more flexible produce industrial focus away from traditional post-process quality management. In most workshops, the most expensive and invaluable job is the inspection of parts. Testing unqualified parts wastes time and wastes money and manpower. The focus now is not on the late detection, but on the prevention of the previous period. The aim is to produce 100% qualified products from the outset with particularly tight tolerances and minimal processing times. Under this aim, a variety of practical techniques have been applied to the machine tools for better process control purposes. Automated process inspection keeps processes and parts under control to minimize downtime due to operator intervention.

These improvements in process control are critical to the mold manufacturing industry. Most mold processing has a one-shot feature because higher cumulative error values ​​are transferred to complex molds, which requires us to complete all processing at once. At the same time, shorter lead times and global competition also require faster tooling. In order to minimize the interference of operators and other factors, these process control systems add a pair of monitoring eyes to the mold manufacturer, which is beneficial to monitor the machining of the machine in the long-term processing and the second and third processes.

Machine tool processing capability

In order to prevent defects from occurring, companies must have the ability to edit process documentation and the process accuracy of the machine. In order to achieve this, it is necessary to follow the standards recognized and accepted by the state, such as in accordance with ISO 230 or ASME B5.54. Both standards require the use of a club and laser interferometer to test the accuracy of the machine in accordance with the recommended procedures. The purpose of using these standards is not to specify that the machine must meet certain accuracy, but to find out what level of precision the machine can achieve. The written data of the parts stipulates that the precision of the machine tool of the enterprise must be able to produce qualified parts and set the precision benchmark in this place. Tested to give you an idea of ​​how high your machine can reach. As long as the machine can reach that accuracy benchmark, it has the ability to process.

Modern machine tools are equipped with test and calibration techniques and are also available to ensure that the machine is accurate and up-to-date. More and more factories and large workshops have their own laser interferometers and electronic equipment, while small factories can use a variety of channels to commercialize and acquire equipment and inspection services at a competitive price. .

In fact, it is now possible to provide a retractable ball detector for any shop for rapid inspection of the machine, and the inspection task can be completed in as little as 15 minutes to maintain the machining accuracy of the machine. The club inspection can accurately evaluate the machine's geometric accuracy, roundness and stick/slip error, servo gain mismatch, vibration, backlash, repeatability and mismatch of the scale. Some club software provides diagnostics for specific errors based on ISO 230-4 and ASME B5.54 and B5.57 standards, and then provides a common English list that lists the various errors in order of overall impact on machine accuracy. source. This allows machine tool maintenance personnel to work directly on the problem area.

Phased club testing keeps pace with the performance trends of machine tools. Preventive maintenance facilitates planning in advance of the machine's ability to deviate from process capability. Industry generally tends to calibrate machine tools as needed, rather than time. There is no reason to take care of a good machine that is being produced for maintenance. When it is found that something is not normal, let the test club and the produced parts be determined. Production can continue during the test.

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