Automatic tapping machine quality appraisal

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automatic tapping machine takes the synergy of precision thread processing and dynamic stability as its core principle. By optimizing the spindle speed, tapping depth accuracy and coaxiality, it achieves the synergy of thread processing quality, processing efficiency and tool life. It is widely used in automotive parts, aerospace, 3C electronics and mold manufacturing fields. In the processing of aluminum alloy thin-walled parts, it is used for efficient forming of fine threads below M3; in stainless steel deep hole tapping, it meets the precise supply of coolant; in multi-axis linkage scenarios, it ensures the accuracy and consistency of multi-station synchronous processing. Compared with traditional equipment, automatic tapping machines have features such as intelligent compensation, multi-material adaptation and data traceability, and are the core equipment for precision thread processing.

Zhongke Testing is a product quality appraisal service organization registered with the court. It can provide automatic tapping machine quality appraisal services. It has a professional appraisal team and advanced instruments and equipment to provide fair and accurate appraisal results for automatic tapping machine quality appraisal.

As the demand for high-precision processing increases, related quality dispute cases have increased significantly. The judicial dispute focuses on:

1, performance index dispute: excessive thread diameter, spindle vibration intensity;

2, material defects: insufficient tap coating adhesion, guide sleeve wear resistance life;

3, process problems: cooling system flow fluctuations, multi-axis synchronization errors;

4, contract performance disputes: core modules (such as imported servo drive systems, intelligent compensation algorithms) are inconsistent with the technical agreement.

0 Such cases require thread accuracy testing, tool life verification and dynamic processing simulation to clarify the quality responsibility.

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Automatic tapping machine litigation quality appraisal mainly includes the following technical methods:

1. Equipment appearance inspection

The appraiser will inspect the appearance of the automatic tapping machine to see whether there is obvious damage, deformation, etc. of the equipment. For example, whether there are any collision marks on the device's casing, or whether the parts are missing or loose, etc. Appearance inspection can initially determine whether the equipment has been affected by external forces during transportation, installation or use.

2, performance testing

Performance testing is a key link in identification. Appraisers will test various performance indicators of the equipment, including tapping accuracy, torque, speed, etc. By actually processing the workpiece, the size and quality of the tapping are measured and compared with the standards agreed in the contract. At the same time, it will also test whether the automation functions of the equipment are normal, such as automatic loading and unloading, program control, etc.

03, electrical system detection

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2The detection of electrical systems mainly includes performance testing of electrical components, circuit connection inspection, etc. Appraisers will use professional testing equipment to check whether the parameters of electrical components meet the requirements and whether there are short circuits, open circuits and other problems in the lines. The stability of the electrical system directly affects the normal operation of the equipment, so electrical system testing is one of the important aspects of identification.

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44, material quality analysis

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6If there are quality problems with some parts of the equipment, appraisers may analyze the materials. Determine whether the quality of the material meets the requirements through metallographic analysis, chemical composition analysis and other methods. Material quality issues can be one of the causes of component damage, so material quality analysis can help pinpoint the source of quality issues.

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An aviation parts factory of the applicant signed a "Procurement Contract for Titanium Alloy Thin-walled Parts Tapping Machines" with an equipment manufacturer of the respondent, and it was agreed that the thread qualification rate is ≥99.8%. After being put into production, the pass rate of thread stop gauges was only 97%. The manufacturer argued that it was caused by batch differences in titanium alloy materials.

identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of the "automatic tapping machine", contract technical agreement, on-site inspection case materials and other data, and made the following qualitative analysis Quantity analysis opinion:

The spindle radial runout of the automatic tapping machine involved in the case is 0.015mm (agreement ≤0.008mm), the CrAlN content of the tap coating is only 70% (agreement ≥85%); the coolant flow fluctuates by ±18% (agreement ±5%), resulting in poor chip removal.

The appraisal conclusion determined that the mechanical accuracy of the equipment and defects in the coating process were the main reasons for the failure.

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Automatic tapping machine quality appraisal report should include:

1, appraisal purpose (such as processing defect attribution, contract compliance verification) and reference standards;

2, involved equipment model, control system version, process parameter record;

3, detection method and equipment List (such as thread measuring instrument, SEM);

4, detection data and failure correlation analysis (such as the impact of spindle runout on thread pitch diameter);

05,clear quality responsibility determination conclusion and technical basis;

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26,signature of appraiser, mechanical engineer qualification certificate and official seal of the organization.

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