Metal wire processing machine quality appraisal

metal wire processing machine takes precision drawing and intelligent control synergy as its core principles. By optimizing mold design, tension closed-loop control and annealing process parameters, it achieves synergy of wire diameter accuracy, surface finish and mechanical properties. It is widely used in cable manufacturing, automotive springs, precision electronics, aerospace and other fields. In the wire and cable industry, it is used for micro-drawing of copper and aluminum conductors; in the automotive parts industry, it meets the continuous processing needs of high-strength steel wires; in the electronics industry, it ensures nano-level surface treatment of bonding wires. Compared with traditional equipment, metal wire processing machines have the characteristics of high production efficiency, excellent yield, and low energy consumption. They are the core equipment for high-precision manufacturing of metal wires.

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

As the demand for metal wire refinement increases, related quality dispute cases have increased significantly. The judicial dispute focuses on:

1, performance index dispute: excessive wire diameter tolerance, surface scratch rate;

2, material defects: uneven grain size of polycrystalline diamond (PCD) in wire drawing die, annealing furnace Insufficient Cr content in the heat-resistant alloy;

3, process problems: delayed response of the tension control system, flow fluctuations in the cooling and lubrication system;

4, contract performance dispute: key modules do not comply with the technical agreement.

Metal wire processing machine litigation quality appraisal technical methods include:

1. Appearance inspection: Check the appearance of the machine for defects, corrosion or damage.

2. Dimensional measurement: Measure the size of the processed metal wire to verify whether it meets the design requirements.

3. Performance test: Test the processing capability, accuracy and stability of the machine.

4. Material analysis: Chemical analysis and microscopic examination of machine parts to determine whether materials meet standards.

A cable factory of the applicant signed a "Purchase Contract for Φ0.05mm Copper Wire Processing Machine" with an equipment manufacturer of the respondent, agreeing on a wire diameter tolerance of ±0.01mm. After being put into production, the ovality of the copper wire exceeded the standard (≥0.03mm). The manufacturer argued that the purity of the raw materials was insufficient.

identification analysis results:

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

The wire drawing die sizing area of the involved metal wire processing machine has a cone angle of 12° (agreement ≤ 8°), resulting in disordered metal streamlines; the tension control system fluctuates by ±2.5% (agreement ≤ ±1%); the temperature control deviation of the annealing furnace is ±10°C, and the grain size is uneven (2-8 μm).

The appraisal conclusion determined that defects in mold design and temperature control were the main causes of loss of accuracy.

Metal wire processing machine quality appraisal report should include:

1, appraisal purpose and reference standards;

2, specifications of the pipe involved, production batch number, construction record;

3, inspection List of methods and equipment;

4, analysis of correlation between test data and failure;