Is there a standard for mold inspection?

Inspect external materials, internal processing parts and assembly molds as required to ensure that the materials, parts and molds put into use meet the expected requirements.

2. Scope

It is suitable for all parts and molds that constitute the mold, including purchased parts, outsourced parts and processed parts.

3. Definition

Incoming inspection: inspection of externally purchased materials and processed products.

Process inspection: inspection of mold parts, semi-finished products and finished products processed internally.

Final inspection: inspection after mold assembly, including inspection of mold appearance, formability, molded products, etc.

4. Responsibility

4. 1 The engineering department is responsible for providing relevant inspection data.

4.2 The quality inspection department is responsible for incoming inspection, process inspection and final inspection of materials, parts and molds.

4.3 The warehouse shall be responsible for the quality of purchased materials and cooperate with the quality inspection department to do a good job in incoming inspection.

4.4 The production department shall assist the process inspection to ensure that the materials that have not been inspected or failed the inspection are not put into use.

5. Inspection workflow

5. 1 incoming inspection

5. 1. 1 operation flow chart

5. 1.2 operation flow

5. 1.2. 1 The warehouse keeper shall confirm the information such as material type, supplier and quantity when receiving foreign materials.

After confirmation, store the materials in the temporary storage area, mark them as "pending inspection" and notify the quality control department.

5. 1.2.2 After receiving the inspection information, the quality inspection department will check the name, specifications, suppliers, packaging and labels of the materials with the corresponding procurement documents, and then sample or inspect all the materials without error, and fill the inspection results into the Inspection Record for delivery/receipt.

5. 1.2.3 qualified materials shall be labeled as "qualified", and the warehouse keeper shall go through the warehousing formalities.

5. 1.2.4 the quality inspection department will review the unqualified materials together with designers, assemblers, CNC and other relevant personnel, and the qualified materials will be marked as "specially adopted", while the unqualified materials will be marked as "unqualified" and isolated.

5. 1.2.5 The purchasing person-in-charge will feed back the information of nonconforming products to the supplier, and those that can't be used will be returned, and at the same time, fill out the Quality Abnormal Corrective Measures Sheet.

5. 1.2.6 If special materials need to be trimmed, they can only be put into use after passing the inspection.

5.2 Process inspection

5.2. 1 Operation Flowchart

workflow

5.2.2. 1 Conduct self-inspection after each working procedure is completed; Self-inspection is unqualified, rework again. If this process cannot be reworked, it will be treated as unqualified.

After 5.2.2.2 receives the inspection information, the quality inspection department will conduct sampling or full inspection, and fill in the inspection results in the Inspection Record for Outgoing/Warehousing.

Parts that pass the inspection in 5.2.2.3 shall be marked as "qualified" and handed over to the next process.

5.2.2.4 Quality Inspection Department will review the unqualified parts together with designers, assemblers, CNC and other related personnel. Acceptable ones will be marked as "specially adopted", and those that cannot be used will be marked as "unqualified" and isolated.

For nonconformities in 5.2.2.5, the quality inspection department will issue a rectification report on nonconformities, and relevant departments will analyze, correct and prevent the problems and confirm the preventive measures.

If the parts specially used in 5.2.2.6 have an impact on other processes, the responsible person shall promptly notify the relevant parties; Parts that need to be trimmed must pass inspection before they can be put into use.

5.3 Final inspection

5.3. 1 Operation Flowchart

workflow

5.3.2. 1 After the mold parts are manufactured, the fitter is responsible for assembling all the composite parts, and then assembling the composite mold, and ensuring that all the parts function normally and the nonconformities are corrected in time.

After the final assembly in 5.3.2.2 is actually assembled, the quality inspection department will conduct inspection according to the relevant contents of the mold self-inspection table, and form a mold trial contact sheet provided according to the design, and provide a mold trial report.

5.3.2.3: After the trial product samples are delivered, the inspection department will inspect the products; The person in charge of business technology judges the test data provided by the testing department, and puts forward corrective opinions to the production department for problems that do not meet the requirements of drawings or appear in trial operation, as well as design changes required by customers.

The qualified molds produced in 5.3.2.4 are handed over to customers for acceptance.

6. Inspection and testing

6. 1 sampling

Articles of the same specification shall be sampled according to 3 ~ 5 pieces in each batch, or determined by the quality controller. All batches with less than 3 pieces should be inspected, and all key dimensions with tolerance standards should be measured if existing resources can measure them.

6.2 Inspection requirements

6.2. 1 After sampling, the quality control personnel respectively judge the appearance and size, and then conduct destructive inspection.

6.2.2 Environmental requirements for appearance inspection: normal lighting (40W fluorescent lamp with sufficient light) should be adopted, the distance between the measuring surface of the measured object and the naked eye of the inspector should be 25-35 cm, and the observation angle should be 45 perpendicular to the measured surface of the measured object. Angle, observation time is10.5 seconds.

6.2.2 Requirements for monitoring and measuring devices: the accuracy grade of calipers shall not be lower than 0.02mm, the accuracy grade of micrometers shall not be lower than 0.0 1 mm, and the accuracy grade of standard gauges shall not be lower than 0.01mm. Other or self-made measuring devices shall meet the measurement requirements of relevant processes, inspection documents or engineering drawings.

6.3 inspection contents

6.3. 1 Hardware (screws, heating elements, springs, etc. )

Inspection methods of property inspection items require defect categories.

Appearance surface appearance is generally free of color difference, mixed color, oxidation and burr.

No mechanical damage, no defects, deformation and other undesirable matters.

The importance of functional adaptability and product coordination to conform to drawings or specifications.

Use functional tests to measure its mechanical and electrical requirements according to regulations.

It is important that the measuring ruler meets the specifications.

Packaging conditions depend on whether the packaging is intact and whether the labels are legible.

6.3.2 Die parts (including blanks and finished products)

Inspection methods of property inspection items require defect categories.

Appearance The appearance of the surface is visually free from mechanical damage, defects, deformation and cracks.

No oxidation phenomenon, smooth surface, even chamfering without sharp edges, and correct and clear numbering.

The purpose of material supplier testing depends on whether the quality guarantee (or physical property list) provided by the supplier meets the specification requirements.

The hardness of hardness tester meets the specification requirements (45c HRC: 45).

It is very important to verify the processing technology by using the department's trial confirmation.

Inspection methods of property inspection items require defect categories.

It is important that the size ratio meets the requirements of design drawings (holes and grooves can be measured with plug gauges and mandrels).

Dimension micrometer/machine tool

The 3D values of three elements/machine tools meet the requirements of modeling data.

The verticality of three elements/machine tool meets the requirements of design drawings.

Three-dimensional slope/angle ruler

The adaptive sliding part slides smoothly, and the product surface clearance is ≤0.03mm, and other clearances are ≤ 0.05mm..

piercing die

Appearance 1. Mold parts are not allowed to have cracks, and the working surface is not allowed to have surface defects such as scratches, mechanical damage and corrosion.

2. The cutting edge and side of the die must be sharp, and there can be no broken edge, missing edge and mechanical damage.

3. After heat treatment, the hardness of the parts should be uniform, without soft spots and decarbonization areas, and the oxides should be removed.

4. The front and back of the mold should be marked with the mold, including at least: product name, drawing number and mold name.

Mold test 1, the pushing and discharging mechanism must be flexible; And when the mold is opened, it must protrude 0.5- 1 mm from the surface of the male and female mold.

2. All moving parts of the mold should move smoothly and flexibly without stagnation.

3, punching, blanking hole should ensure smooth.

6.4 Defective isobar

6.4. 1 Important: the performance can't reach the expected goal, the mold can't be formed or the final product can't meet the requirements, and the customer doesn't accept it or has a major disassembly.

6.4.2 General: it is acceptable when it does not meet the specified requirements but does not affect the performance or communicate with customers.

6.5 Special adoption

The following situations that do not meet the specified requirements but do not affect the performance can be specially adopted.

A parts with out-of-tolerance dimensions can meet the requirements after actual matching, and can be specially produced (the product surface clearance shall not be greater than 0.03mm).

B. After reprocessing or repair, the product can meet the requirements.

C. after communicating with customers, defects can be accepted.

6.6 Exemption from inspection

Items with low requirements, fully guaranteed process and undetectable existing resources can be exempted from inspection after approval by the competent personnel.

6.7 Emergency release

Production is in urgent need of inspection, and the unqualified products in this process will not affect the processing of the next process before emergency release.

7. Relevant records

Unqualified report and inspection record of die electrode

Mold self-inspection form and incoming/outgoing inspection record form

Inspection records of formwork and corrective measures for abnormal quality

Examination, approval and preparation system

Date, date, date