Product Description
Punching parts play a crucial role in numerous industries, seamlessly transitioning from a mere concept to a fully realized component that enhances the functionality and aesthetics of various products.

Our products show
Workcraft |
CNC punching machining & stamping, laser cutting, bending, threading, welding, deep drawing, polishing, tapping, riveting, final assembly. |
Materials we can process on |
any steel sheet, copper, aluminum, brass, iron |
Surface Treatment |
Brushing, sand blastig, electroplating (zinc , nickel , chrome coating) Powder coating, polishing(mirror polishing, electrolytic polishing), |
Tolerance |
the best can be +/-0.01mm |
Packing |
carton, pallet |
Application |
electrics , Vehicles, Construction Machineries Engineering Machineries, Food Machineries, |
Quality Control |
we have testing tooling or can apply different tests from the 3rd party |
Technical File Formats |
Solidworks, PRO/E, Auto CAD, PDF, Step, Stp, Dwg, Drw, Prt, etc |
Inspections to work |
IQC, PQC, FQC, OQA |
Our production
Conceptualization and Design
The journey of punching parts begins with a concept. Designers collaborate closely with clients to understand their specific requirements, whether it's for automotive, electronics, home appliances, or other sectors. Using advanced computer - aided design (CAD) software, they translate these ideas into detailed blueprints, carefully considering factors like material selection, dimensions, and the intended function of the part. This initial stage is vital as it lays the foundation for a high - quality punching part that meets all performance and compatibility criteria.
Material Selection
Selecting the right material is key to the success of punching parts. Depending on the application, materials such as stainless steel, aluminum, carbon steel, or copper are chosen. For example, in the automotive industry, parts that require high strength and durability might be made from stainless steel, while aluminum is often preferred for electronics due to its lightweight and good electrical conductivity. The material's properties, including its strength, formability, and corrosion resistance, are carefully evaluated to ensure the punching part can withstand the rigors of its intended use.
Manufacturing Process
Once the design and material are finalized, the manufacturing process commences. Modern punching operations utilize high - precision punching machines. These machines use a die and a punch to cut, shape, and form the metal sheet according to the design specifications. The process is highly automated, ensuring consistent quality and rapid production. Advanced technologies such as progressive die stamping can produce complex parts in a single continuous operation, increasing efficiency and reducing costs.
Quality Control
Throughout the production of punching parts, stringent quality control measures are in place. Every part is inspected for dimensional accuracy, surface finish, and structural integrity. Non - destructive testing methods, such as X - ray and ultrasonic testing, may be employed to detect any internal flaws. This meticulous quality assurance process guarantees that only flawless punching parts are delivered to clients, minimizing the risk of product failures in the end - use application.
Completion and Customization
At completion, punching parts are ready to be integrated into various products. They can be further customized with additional processes like surface treatment (such as plating, painting, or anodizing) to enhance their appearance, corrosion resistance, or other properties. Whether it's a small connector in a smartphone or a large structural component in an industrial machine, punching parts from concept to completion are engineered to perfection, providing reliable performance and contributing to the overall success of your products.
Technology capabilities
We work as per AUTOCAD, PRO-E, Solidworks , UG. 3D max WORKS and other 2D & 3D softwares. can design,develop,produce and deliver your PO according to your drawings, samples or just an idea. control of non-standard products and OEM products.


Our quality control
Quality Control
1. IQC, incoming quality control
2.Check the details before the production line operated
3.IPQC, have full inspection and routing inspection during mass production
4.FQC, check the goods after they are finished
5.OQC,check the goods before the delivery
1. Incoming Quality Control (IQC)
- Purpose: IQC serves as the first line of defense in the quality control process for punching parts. Its primary objective is to ensure that all incoming raw materials, components, and supplies meet the required quality standards before they enter the production line. This helps prevent the use of substandard materials that could lead to defective punching parts downstream.
- Inspection Process:
- Material Verification: Upon receipt of materials such as steel sheets, copper, aluminum, or brass, the quality control team verifies the material type, grade, and specifications against the purchase order and technical requirements. For example, if stainless steel sheets are ordered for a specific punching part, the IQC team checks that the steel conforms to the correct stainless - steel grade (e.g., 304 or 316) and has the appropriate thickness tolerance.
- Visual Inspection: A thorough visual inspection is carried out to check for surface defects such as scratches, dents, rust, or uneven surfaces on the raw materials. Any visible flaws that could affect the punching process or the final quality of the part are noted, and the materials may be rejected or sent back to the supplier for replacement.
- Documentation Review: The quality control team reviews all relevant documentation, including material certificates, test reports, and inspection records provided by the supplier. This ensures that the materials have undergone the necessary testing and meet the required quality criteria.
2. Pre - production Line Check
- Purpose: Before the production line commences operation, a detailed check is performed to ensure that all equipment, tools, and processes are in proper working condition and ready to produce high - quality punching parts. This step helps minimize the risk of production - related quality issues from the start.
- Inspection Process:
- Equipment and Tooling Inspection: All punching machines, dies, punches, and other related equipment are inspected for proper calibration, wear and tear, and functionality. For instance, the punching machine's hydraulic system is checked for leaks, and the dies and punches are inspected for any signs of damage or excessive wear that could affect the shape and accuracy of the punched parts.
- Process Parameter Verification: The production process parameters, such as punching force, speed, and feed rate, are verified against the established process specifications. Incorrect parameter settings can lead to parts with incorrect dimensions, poor surface finish, or even damage to the equipment.
- Operator Training and Readiness: Ensuring that the production operators are properly trained and understand the production process, quality requirements, and safety procedures is also an essential part of the pre - production check. This includes verifying that they are familiar with the operation of the equipment and know how to identify and report any potential quality issues.
3. In - Process Quality Control (IPQC)
- Purpose: IPQC is crucial for maintaining consistent quality during mass production. It involves both full inspections of parts at specific intervals and routing inspections of the production process to identify and correct any quality problems in a timely manner.
- Inspection Process:
- Full Inspection: At regular intervals (e.g., every hour or every 100 parts produced), a sample of punching parts is selected for a full inspection. This includes checking the dimensions of the parts using precision measuring instruments such as calipers, micrometers, and height gauges to ensure they are within the specified tolerance range (e.g., ±0.01mm). The surface finish of the parts is also inspected for any defects such as burrs, scratches, or unevenness.
- Routing Inspection: Quality control personnel regularly tour the production line to monitor the production process. They check for compliance with the established process parameters, observe the operation of the equipment, and ensure that the operators are following the correct procedures. For example, they may check if the metal sheets are being properly loaded into the punching machine, if the dies are being changed correctly, and if the parts are being handled and stored properly during the production process.
- Non - Conformance Handling: If any quality issues are detected during IPQC, the production line may be stopped immediately to prevent the production of more defective parts. The root cause of the problem is investigated, and corrective actions are taken, which may include adjusting the process parameters, repairing or replacing faulty equipment, or providing additional training to the operators.
4. Final Quality Control (FQC)
- Purpose: FQC is conducted after the punching parts have been fully manufactured and assembled (if applicable). Its main goal is to ensure that all parts meet the final quality requirements and specifications before they are sent for packaging and storage.
- Inspection Process:
- Comprehensive Inspection: A complete inspection of each finished punching part is carried out. This includes a final check of all dimensions, surface finish, functionality (if applicable), and any other relevant quality criteria. For example, if the punching part is a component of an electrical device, its electrical conductivity and insulation properties may also be tested.
- Functionality Testing: In cases where the punching part has a specific function, such as a spring - loaded punching part used in a mechanical assembly, functionality tests are performed to ensure that it operates as intended. This may involve testing the part's load - bearing capacity, its ability to return to its original shape after being deformed, or its compatibility with other components.
- Quality Assurance Documentation: All inspection results are documented, and a quality assurance certificate may be issued for each batch of parts that passes the FQC. This documentation provides evidence of the part's quality and can be used for traceability and customer satisfaction purposes.
5. Outgoing Quality Assurance (OQC)
- Purpose: OQC is the last quality control check before the punching parts are delivered to the customer. Its main purpose is to ensure that the parts are in the correct quantity, properly packaged, and in good condition for shipping.
- Inspection Process:
- Quantity Verification: The number of punching parts in each shipment is counted and verified against the shipping list and customer order. This helps prevent shortages or overages, which could cause inconvenience to the customer.
- Packaging Inspection: The packaging of the parts is inspected to ensure that it provides adequate protection during transportation. This includes checking that the parts are properly secured in cartons or on pallets, that there is sufficient cushioning material to prevent damage, and that the packaging is labeled correctly with the part name, quantity, destination, and any other relevant information.
- Final Visual Inspection: A final visual inspection of the parts is carried out to check for any damage or defects that may have occurred during the packaging or handling process. If any issues are found, the parts are either repaired or replaced before the shipment is released for delivery.
Applications
Punching parts are mainly used in the following industries:
- Automotive Industry: The automotive industry is one of the main application fields of metal stamping parts. During the automobile manufacturing process, a large number of metal stamping parts are used in the manufacturing of components such as the vehicle body, chassis, engine, and interior, such as body panels, doors, hoods, and chassis support parts.
- Home Appliance Industry: Metal stamping parts also have important applications in the home appliance industry. Home appliance products such as washing machines, refrigerators, and air conditioners require a large number of metal stamping parts, such as the outer casing of washing machines, the door panels of refrigerators, and the outer casings of air conditioners.
- Electronic Communication: Metal stamping parts also play an important role in the field of electronic communication. Components such as the metal casings, keyboards, and connectors in electronic products like mobile phones, computers, and routers are often manufactured through the stamping process.
- Construction and Decoration: In the construction and decoration industry, metal stamping parts are used in the manufacturing of door and window hardware fittings, staircase handrails, interior decoration components, etc.
Company Profile

Zhuji Bosswinn Springs Co., Ltd. is a company that integrates manufacturing and trading, with main business including the production of metal springs, CNC machining, punching parts, and other hardware products2. Here is a detailed introduction:
- Metal Springs10: The company has rich experience in metal spring production, with a history of 19 years in the metal springs business. It can produce various types of springs, such as spiral springs, wave springs, compression springs, tension springs, and torsion springs. These springs are made of various materials, including stainless steel, carbon steel, alloy steel, etc. The material diameter or thickness ranges from 0.1mm to 8mm. They have a wide range of applications in industrial equipment, automobiles, motorcycles, electronics, sports equipment, and telecommunications products.
- CNC Machining: The CNC machining production line of Zhuji Bosswinn Springs Co., Ltd. is equipped with advanced and high - precision equipment, such as inclined rail compound machine tools, CNC machine tools, and induction hardening equipment2. It is mainly engaged in the production of precision parts for various auto parts, mechanical equipment, and other intelligent products2. The company has independent mold development and processing capabilities, which can provide customers with customized CNC machining parts according to their needs2.
- Punching Parts: The stamping parts production line of the company is equipped with advanced machinery, including high - speed punch machines, CNC hydraulic presses, and CNC bending machines2. It can produce a variety of high - quality punching parts, such as metal stamping parts for automobiles, hardware male metal stamping parts, and other stamping components6. These punching parts have the characteristics of high precision and good quality, and can meet the needs of different customers.
- Other Services: The company provides a series of value - added services while producing metal springs, CNC machining, and punching parts, such as surface treatment services including painting, electroplating, polishing, and blackening10. In addition, the company also provides customized services, which can provide customers with overall solutions according to their specific requirements, helping customers improve product performance and reduce costs.
FAQ
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Is Bosswinn a manufacturer?
Yes, we are a manufacturer. The business owner owns 2 factories dedicated to producing metal springs, CNC machining parts, and stamping parts. This setup enables us to have full control over the production process, ensuring high - quality products and on - time delivery.
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What is the delivery time?
Under normal circumstances, the delivery time ranges from 10 to 15 days. However, during peak seasons, it may take up to one month. We strive to meet our customers' deadlines and will keep you informed throughout the production and shipping process.
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What is the Minimum Order Quantity (MOQ)?
For the first - time orders, we are flexible and can accept orders of any quantity. For mass production orders, we recommend a quantity of 10,000 pieces. This helps us to optimize production efficiency and offer more competitive prices, while still meeting the needs of our customers.
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What are the payment methods?
We offer multiple payment methods for your convenience, including T/T (Telegraphic Transfer), L/C (Letter of Credit), and Western Union. These options provide secure and reliable ways to conduct transactions, ensuring a smooth business process for both parties.
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How can we confirm the samples?
We offer free samples to our customers. This allows you to assess the quality, specifications, and functionality of our products before placing a bulk order. We believe that providing free samples is an important step in building trust and ensuring customer satisfaction.