Quality Control Overview
At Wuyuan Jieyi Automotive Electrical Appliance Co., Ltd., quality requirements are defined by the approved product drawing, applicable standard, material specification and agreed order requirements. These requirements provide the basis for manufacturing control and product acceptance.
Quality Management System & Certifications
The company holds ISO 9001 Quality Management System certification and IATF 16949 Automotive Quality Management System certification. The company also lists ISO Environmental Management System Certification and RoHS Product Certification.
For relevant automotive projects, the company reports the use of Advanced Product Quality Planning (APQP), Production Part Approval Process (PPAP) and Failure Mode and Effects Analysis (FMEA). Their application is determined by the requirements of the individual project and customer.
Incoming Material Inspection
Incoming raw materials are reviewed before release to production. The inspection scope is based on the material specification and the requirements for the ordered part.
- Material identification: Check the material grade and identification against the order and applicable product requirements.
- Supplier documentation: Review available material certificates or supporting documents when required by the specification.
- Appearance and condition: Examine the incoming material for visible defects or conditions that could affect cold forming and subsequent processing.
- Additional verification: Arrange relevant material checks when they are specified in the inspection plan or product requirements.
In-Process Quality Control
Cold Forging and Machining
During cold forging, the forming sequence is controlled against the required part configuration. Machining checks focus on features created by the operation, such as steps, holes, shoulders and other specified profiles, where applicable.
Thread Rolling
For threaded parts, the rolling operation is controlled against the specified thread form and applicable drawing or standard. Setup and process checks are used to maintain the required thread configuration during production.
Heat Treatment
The heat-treatment route and process parameters are set against the specified material and required mechanical properties. Applicable process conditions are controlled for the part rather than applying one setting across all fastener designs.
Surface Treatment
Available finishes listed by the company include galvanizing, Dacromet coating, black zinc plating and blackening. The selected finish is defined by the order specification and is matched to the part and its intended application.
Finished Product Inspection
Final inspection determines whether the completed product meets the approved drawing, applicable product standard and agreed acceptance criteria. The inspection plan is specific to the part; the same test package is not applied to every bolt, screw, rivet, pin or shaft.
Acceptance criteria are established before inspection and may cover the characteristics required for the individual order. Final results are assessed against those criteria before the product is accepted.
Inspection Equipment & Testing Capabilities
The company identifies the following instruments in its standardized laboratory:
- Digital Rockwell Hardness Tester: Used to test the surface hardness of fasteners.
- Micro Vickers Hardness Tester: Used for hardness measurement on coatings and small or thin-walled parts, where applicable.
- JVB250 2D Image Measuring Instrument: Used to measure product contours, hole diameters and dimensional tolerances.
- Precision Salt Spray Tester: Used to conduct neutral salt spray tests on product coatings.
Quality Control FAQ
Can you provide samples before a production order?
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Sample availability, sample or tooling charges, and preparation time are confirmed after review of the drawing, material, finish and requested quantity.
What are the MOQ, lead time, packaging and shipping arrangements?
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MOQ and lead time are quoted according to part design, material, tooling or setup needs, and order quantity. Packaging, transport method, delivery schedule and payment terms are stated in the quotation or pro forma invoice for confirmation before the order is placed.
What information is needed to quote a custom stepped shaft or locating pin?
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Provide a dimensioned drawing showing overall length, each diameter and step length, shoulder positions, grooves or holes, material grade, tolerances and surface finish. Include the drawing revision and required quantity.
Can you manufacture custom rivets to a drawing?
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The company's listed range includes solid, semi-tubular and slotted rivets. For a custom inquiry, provide the rivet type, material, shank diameter and length, head dimensions, joining thickness, drawing and required quantity for technical review.