Slitting machine quality appraisal

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slitting machine tool takes the synergy of high-precision slitting and tension control as its core principle. By optimizing the blade gap adjustment accuracy, coiling tension stability and shearing speed, it achieves synergy between strip slitting width tolerance, edge burr height and production efficiency. It is widely used in the field of slitting processing of metal coils (steel, aluminum, copper), plastic films and composite materials. In the steel industry, it is used for high-precision slitting of cold-rolled plates; in the field of new energy, it meets the slitting needs of lithium battery pole pieces; in packaging materials, it ensures clean and dust-free film slitting. Compared with traditional slitting equipment, slitting machine tools have the characteristics of dynamic tool distance compensation, multi-axis synchronization accuracy and intelligent diagnosis, and are the core equipment of precision slitting technology.

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

As the requirements for cutting accuracy increase, related quality dispute cases have increased significantly. The judicial dispute focuses on:

1, performance index dispute: the cutting width is out of tolerance, and the edge burrs exceed the standard;

2, material defects: the carbide layer of the blade peels off, the fatigue life of the tension roller bearing ;

3, process problems: cutter shaft concentricity deviation, coiling tension fluctuation;

4, contract performance dispute: core modules (such as servo correction system, pneumatic pressing device) are inconsistent with the technical agreement.

0 Such cases need to pass cutting accuracy verification, material failure analysis and dynamic parameter tracing to clarify the quality responsibility.

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1. Appearance inspection: Visually inspect the appearance of the slitting machine tool, verify the nameplate, model, specifications and other information, and evaluate the coating and assembly quality.

2. Structural size measurement: Measure the overall size of the machine tool, shear blade size, guide size and other key parameters, and compare them with design drawings or industry standards.

3. Processing performance test: actually process metal sheets of a certain thickness to evaluate the shearing accuracy, shearing flatness, surface quality and other processing performance of the machine tool.

4. Calibration measurement: Calibrate key components such as the shearing blade, guide device, and feeding device of the machine tool to check its accuracy and stability.

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An aluminum processing factory of the applicant signed a "Six-axis Slitting Machine Tool Purchase Contract" with an equipment manufacturer of the respondent, and it was agreed that the slitting burr should be ≤0.01mm. After being put into production, the edge burrs of the aluminum strip reached 0.08mm. The manufacturer argued that it was caused by uneven hardness of the raw materials.

The quality analysis expert group conducted a discussion and comprehensive technical analysis on the relevant information of "Slitting Machine Tool", contract technical agreement, on-site inspection case materials and other data, and made the following quality analysis opinions:

involved in the case, the repeatability of the blade gap adjustment mechanism of the slitting machine tool is ±0.03mm (agreement ±0.01mm), the radial runout of the cutter shaft is 0.05mm (agreement ≤0.02mm); the carbide coating is partially peeled off, and the microhardness is only HV 1550 (agreement ≥ 1800).

The appraisal conclusion concluded that the mechanical accuracy of the equipment and defects in the blade material were the main reasons for excessive burrs.

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Slitting machine tool quality appraisal report should include:

1, appraisal purpose (such as slitting defect attribution, performance verification) and reference standards;

2, equipment model involved, control system version, maintenance records;

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

4, correlation analysis between detection data and failure (such as the impact of cutter shaft runout on burrs);

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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