Service Process

Qinhuangdao Zhongwei Precision Mechanical Parts Co., Ltd. provides you with the following services in an all-round way: saving customers' time and bringing products online quickly, our fastest solution, the investment casting process is the fastest 15-20 days for sample production, and the forging process is 25-30 days Samples can be produced within 3 days, metal injection molding process can be produced in 30-35 days, CNC machining process depends on the product structure, and samples can be produced in 2-3 days.

We provide you with: investment casting process customization services; metal injection molding process customization services, forging process customization services; and CNC precision machining process services, specific service processes

1: Process formulation, choose your production process

According to the requirements of the drawings, the production process is determined. Our company will formulate the production process requirements of each process according to the production situation of each process to ensure that the product is formed at one time during the development stage, solving customers' worries and saving costs for customers.

2: According to the process and product design,

According to the drawing requirements, we will develop a series of product solutions for you, and the investment casting process will match the size of the parts.

As shown below:

2-1: The sharpest part of the product is easily under-poured, so the nozzle is placed on the opposite side. When pouring molten steel, the molten steel must be replaced at the sharpest part as soon as possible to ensure the product yield.

2-2: The marked size requires an addition or subtraction of 0.075mm.

2-3: The size is plus or minus 0.1, which is restricted by the position size of 2. Therefore, when designing the size process, select their closest size as the production size.

Cooperate with product display

According to the drawing requirements, we will develop a series of product solutions for you. The investment casting process matches the size of the parts. Our optimal tolerance is 0.05mm. The metal injection molding process is 0.02mm. The forging process is 0.10-0.20mm. After casting, it can Ensure that two or more parts can be used together. It is suitable for parts that are not very precise and can be used directly together. If your product requires electroplating or other surface treatment, please explain it based on the technology. We will provide it based on the plating of the product. You control the tolerance range.

3: Confirm the drawings (the displayed drawings are obtained online. The company keeps each customer's drawings confidential and will not upload them to third parties or to the Internet to protect all the rights of customers)

We can perform projector surveying and mapping based on customer samples, conduct three-dimensional inspection of complex parts and generate three-dimensional drawings, and can also produce according to customer drawings and confirm the final drawings.

4: Mold development

After communicating with the customer, we determine the drawing structure and production dimensions, and start designing and making abrasive tools. Good products come from good molds. As we said in the second item, the quality of matching parts depends entirely on good mold manufacturing. Solution, we can ensure that the products we produce are consistent with your products, with smooth and delicate surfaces,

5: Sample trial production

5: Sample trial production

The mold production cycle is generally 5-15 days, and the trial sample is about 7-15 days. The sample is formulated through the process, and the sample is initially tested to see if it matches the drawing size. During the inspection process, this product will address the issues 2-2; 2-3. , there is a deviation. After the later shaping and grinding tool, these two dimensions are corrected. The correction tool is simply displayed. The specific usage is,

After the parts are put into the Correction mold standard outer diameter, stamping correction is performed with 1Correction mold punch to ensure that the two dimensions are qualified and that the subsequent processing procedures, surface treatment, and assembly meet the requirements.

6: Mechanical processing

According to the requirements of the drawing, secondary processing is performed on the dimensions that need to be processed to ensure that the dimensions are consistent with the drawing. During the production process, the product dimensions are fully inspected with pass and stop gauges to ensure that the shipment yield is 100%. If there are any individual items that do not meet the requirements Yes, we will replenish unqualified products next time.

7: Product inspection

The company will conduct testing according to the drawing requirements, such as salt spray test, mechanical properties, material analysis, mechanical properties, etc. The company's testing methods are as follows

1-1. Dimensional inspection: Inspect the dimensions of components to ensure they meet design requirements. Including measuring length, diameter, width, height, thickness and other dimensional parameters.

1-2. Geometric shape detection: Detect the geometric shape of parts, including straightness, roundness, right angle, cylindricity, flatness, coaxiality and other parameters to ensure that its shape meets the design requirements.

1-3. Surface quality inspection: Test the surface quality of parts and components, including surface finish, surface roughness, surface flatness and other parameters to ensure that the surface quality meets the requirements

1-4. Material composition testing: Detect the composition of materials used in parts and components, and determine whether the composition of parts materials meets the requirements through chemical analysis and other methods.

1-5. Mechanical property testing: Test the mechanical properties of parts, including tensile strength, yield strength, hardness, toughness and other parameters to ensure that the parts have sufficient strength and durability during use.

1-6. Assembly and fit testing: Test the assembly performance and fit of parts to ensure that the parts can be assembled and matched normally and meet the design requirements.

8: Surface treatment

The company can perform shot blasting, polishing, pickling, electroplating, spraying, oxidation and other treatments according to the drawing requirements.

9: Assembly

The company assembles the parts according to the specified technical requirements and makes them into qualified products through debugging and inspection. The assembly starts with the design of the assembly drawings.

10: Pack and ship

Shipments are carried out according to the customer's order quantity. Generally, the order quantity will fluctuate by 10%. If the quantity is insufficient due to a link in the process, we will notify the customer as soon as possible whether to replenish the order quantity, so as to ensure the interests of the customer in the shortest possible time.