Lock assembly machine quality appraisal

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lock assembly machine takes high-precision positioning and multi-station collaboration as its core principles. By optimizing the assembly cycle, torque control accuracy and visual positioning error, it achieves precise assembly of lock cores, pins, springs and other components, as well as functional reliability and production efficiency. It is widely used in automated production lines for smart door locks, automobile locks and industrial locks. In the assembly of smart locks, it is used for millimeter-level alignment of the fingerprint module and the lock body; in the field of automobile locks, it meets the anti-misinstallation requirements of lock cylinders with high anti-theft levels; in multi-variety mixed line production, it ensures rapid model change and automatic parameter adaptation. Compared with traditional equipment, lock assembly machines have the characteristics of intelligent error-proofing, data traceability and flexible compatibility, and are the core equipment of lock manufacturing.

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

With the expansion of the smart lock market, related quality dispute cases have increased significantly. The judicial dispute focuses on:

1, performance index dispute: the assembly qualification rate does not meet the standard, and the anti-misassembly function fails;

2, material defects: the wear-resistant coating of the fixture peels off, and the temperature of the servo motor rises;

3, process issues: visual positioning repeatability, torque sensor calibration deviation;

4, contract performance dispute: core modules (such as imported high-precision electric batch batchers, AI vision system versions) are inconsistent with the technical agreement.

0 Such cases need to pass functional testing, material failure analysis and dynamic assembly verification to clarify the quality responsibility.

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lock assembly machine quality identification technical methods mainly include:

1, physical detection method

The physical detection method is one of the commonly used methods in identification. By testing the appearance, size, hardness and other physical properties of the equipment, you can determine whether there are obvious quality problems in the equipment. For example, a hardness tester is used to test the hardness of parts and components to determine whether they meet the material requirements; measuring tools such as calipers and micrometers are used to detect the dimensional accuracy of the equipment to determine whether it meets the design requirements.

2, chemical analysis methods

For some issues involving material quality, chemical analysis methods can play an important role. By analyzing the chemical composition of equipment parts, we can determine whether the composition of the material meets the requirements and whether there are impurities and other problems. For example, a spectrum analyzer is used to analyze the chemical composition of metallic materials to determine their elemental content.

03, functional test method

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2The functional test method is mainly to conduct actual testing of various functions of the device to verify whether the device can operate normally. For example, test the lock core processing function of automated non-standard lock core equipment to observe whether the equipment can process lock cores according to predetermined process requirements, and whether the processed lock cores meet quality standards.

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A smart lock factory of the applicant signed a "Fingerprint Lock Automatic Assembly Line Procurement Contract" with an equipment manufacturer of the respondent, agreeing that the assembly pass rate is ≥99.8%. After being put into production, the actual measurement was only 97.5%. The manufacturer argued that it was caused by employee errors.

appraisal analysis results:

The quality analysis expert group conducted a review of relevant information, contract technical agreements, on-site inspection case materials and other data on the "lock assembly machine" After discussion and comprehensive technical analysis, the following quality analysis opinions were made:

The visual positioning system repetition accuracy of the lock assembly machine involved in the case was ±0.12mm (agreed ±0.05mm), resulting in misalignment of the pins and the lock core; the clamp coating hardness HV 650 (agreement ≥800), uneven clamping force after wear.

The appraisal conclusion concluded that equipment control accuracy and material defects are the main reasons for the insufficient pass rate.

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Lock assembly machine quality appraisal report should include:

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

2, involved equipment model, control system version, production log;

3, testing method and equipment list (such as laser interferometer, SEM);

4, correlation analysis between detection data and failure (such as the impact of positioning error on marble misalignment);

05,clear quality responsibility determination conclusion and technical basis;

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

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