Press assembly equipment quality appraisal

press-fit assembly equipment takes precision pressure control and thermal conduction synergy as its core principles. By optimizing press-fit pressure, temperature uniformity and time accuracy, it achieves synergy between material interface bonding strength, assembly dimensional accuracy and production efficiency. It is widely used in fields such as consumer electronics, semiconductor packaging, new energy batteries and precision optical components. In mobile phone screen lamination, it is used for bubble-free bonding of OLED panels and covers; in power battery manufacturing, it meets the high-precision alignment requirements of battery core stacks; in the field of camera modules, it ensures micron-level lamination of lenses and sensors. Compared with traditional equipment, press-fit assembly equipment has the characteristics of multi-stage pressure curve control (AI adaptive algorithm), real-time deformation monitoring (laser interference + strain feedback), and dust-free environment compatibility (Class 1000 cleanliness level). It is the core equipment of high-precision manufacturing.

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

As precision manufacturing requirements increase, related quality dispute cases have increased significantly. The judicial dispute focuses on:

1, performance index dispute: lamination force deviation, yield;

2, material defects: insufficient thermal conductivity of the heating plate, hardness of the surface hardened layer of the indenter;

3, process issues: temperature field uniformity deviation, servo system positioning repeatability accuracy;

4, contract performance dispute: core modules (such as imported pressure sensors, nano-level alignment systems) are inconsistent with the technical agreement.

Press assembly equipment quality appraisal technical methods mainly include:

1. Equipment performance testing

Test various performance indicators of the equipment, including pressure, temperature, speed, accuracy and other parameters of the equipment, to determine whether the equipment can meet the performance requirements agreed in the technical contract.

2. Structural inspection of the equipment

Check whether the structure of the equipment is reasonable, whether the parts are damaged or deformed, etc., and evaluate the structural strength and stability of the equipment.

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An electronics factory of the applicant signed an "OLED screen lamination equipment purchase contract" with an equipment manufacturer of the respondent, agreeing that the yield rate is ≥99%. After being put into production, the bubble defect rate exceeded 8%. The manufacturer argued that it was caused by the substandard operating environment.

identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of "press assembly equipment", contract technical agreements, on-site investigation case materials and other data, and made the following Quality analysis opinion below:

The lamination pressure deviation of the press-fit assembly equipment involved in the case is ±1.2kN (agreement ±0.5kN), the temperature difference at the edge of the heating plate reaches ±8℃ (agreement ≤±2℃); the HV of the hardened layer of the indenter is only 750 (agreement ≥1000), resulting in local stress concentration.

The appraisal conclusion determined that pressure control and material defects were the main causes of the defect.

Press assembly equipment quality appraisal report should include:

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

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

3, testing methods and equipment Checklist (such as universal testing machine, thermal imaging camera);

4, correlation analysis of test data and failure (such as the impact of pressure deviation on bubble rate);