Services
CNC machining of automotive parts
High-Precision CNC Machining Manufacturer for Automotive Parts
Why US
Choose our Automotive CNC Machining Services
The automotive parts manufacturing industry faces real challenges such as parallel development of multiple vehicle models, rapid technological iteration, stringent quality standards, and tight delivery schedules. We provide the automotive industry with CNC machining and customized manufacturing solutions covering prototype development, verification testing, and functional parts manufacturing, supporting the diverse needs of traditional automobiles, electric vehicles, and emerging mobility technologies.
Leveraging our mature CNC machining, sheet metal processing, and 3D printing capabilities, we can provide stable and controllable parts manufacturing support for automotive OEMs, Tier 1/Tier 2 suppliers, and R&D teams, helping to shorten product development cycles while meeting the automotive industry’s requirements for consistency and traceability.
Why automotive industry clients choose us
Automobile manufacturing is not a competition of single-point processing capabilities, but a comprehensive capability encompassing systems, processes, and results. We have established a manufacturing support system applicable to the automotive industry, encompassing industry certification, quality control, and engineering execution.
Automotive Industry Certification and Compliance Support
We have established a quality and management system that meets the requirements of the automotive industry and have passed the following certifications and process requirements:
- IATF 16949
- ISO 9001
- ISO 14001
- PPAP
These systems are actually applied in the manufacturing process to ensure that parts meet automotive industry standards in terms of consistency, stability, and compliance.
Comprehensive quality documentation and traceability
For the quality requirements of automotive parts during the verification, prototyping, and pre-mass production stages, we can provide complete quality documentation upon request, including:
- Coordinate Measuring Machine (CMM) Inspection Report
- Comprehensive dimensional inspection records
- Materials testing report
- Material Certificate (MTC)
- Certificate of Conformity (CoC)
- First Article Inspection Report (FAI)
All documents are associated with the corresponding part batch, material, and process, enabling customers to conduct internal audits, project evaluations, and subsequent traceability.
Process quality control for automobile manufacturing
To ensure consistency of automotive parts across different projects and batches, we implement rigorous manufacturing and testing procedures:
- Use specialized tools and fixtures for machining and positioning.
- All dimensional measurements are performed using calibrated equipment.
- Review and retain all quality documents and industry certification records.
- Comprehensive intellectual property protection is provided within the platform and manufacturing network.
This process is applicable to the manufacturing of automotive prototypes, test pieces, and functional components.
Our automobile manufacturing capabilities
We provide the automotive industry with multi-process manufacturing capabilities covering CNC machining, sheet metal fabrication, and 3D printing, supporting different stages of needs from concept prototyping and functional verification to small-batch parts delivery. All manufacturing processes are performed under the quality system requirements of the automotive industry, ensuring dimensional consistency, material stability, and delivery reliability.
CNC machining is the most commonly used and stable process in automotive parts manufacturing, and it is suitable for functional parts with high requirements for precision and consistency.
Processing capabilities and characteristics
- Integrated support for milling, turning, and post-processing
- Suitable for automotive prototypes, test pieces, and functional components.
- Tolerances up to ±0.020 mm (±0.001 in)
- Supports the manufacturing of middleware, replacement parts, and tooling components.
- Minimum delivery time: 5 business days
CNC machining can cover a variety of commonly used automotive materials such as steel, aluminum alloy, titanium alloy and engineering plastics, and is suitable for the manufacturing needs of autonomous driving systems, electric vehicle components and commercial vehicle parts.
Sheet metal processing is widely used in automotive structural parts, brackets, shells, and production line tooling, and has high requirements for structural stability and assembly consistency.
Sheet metal manufacturing capabilities
- Laser cutting, precision bending and post-processing
- Suitable for automotive structural components, mounting brackets, and housing parts.
- Tolerances up to ±0.1 mm (±0.004 in)
- Minimum delivery time: 5 business days
Through mature sheet metal processes, we are able to reliably manufacture automotive structural and assembly parts suitable for mass production verification.
3D printing is widely used in the automotive R&D stage for rapid prototyping, structural verification, and functional testing, which helps to shorten development cycles and reduce prototyping costs.
Supported additive manufacturing processes
- FDM
- SLA
- SLS
- MJF
Machining accuracy and delivery
- Dimensional tolerance: ±0.3%, lower limit ±0.3 mm (±0.012 in)
- Minimum delivery time: 1 business day
3D printing is particularly suitable for the housings of autonomous driving systems, test components for electric vehicles, and prototypes of complex structures, complementing CNC machining and sheet metal processing.
Automotive materials and surface treatment capabilities
Automotive components have vastly different requirements for strength, durability, corrosion resistance, appearance consistency, and cost control depending on their application scenarios. We support a variety of commonly used metals and engineering plastics in the automotive industry and provide mature, controllable surface treatment processes to meet diverse needs from prototype verification to functional component manufacturing.
We can process a variety of metal materials commonly used in the automotive industry, suitable for structural parts, load-bearing components, functional parts, and tooling fixtures.
- Steel and stainless steel
Steel and stainless steel are widely used in automotive parts for applications requiring high strength, wear resistance, and structural stability.
- Aluminum alloy
Aluminum alloys are commonly used in lightweight automotive parts, electric vehicle structural components, and housing parts, effectively reducing overall weight while maintaining strength.
- Titanium alloy
Titanium alloys are suitable for automotive functional components and test kits that require high strength, corrosion resistance, and reliability.
In non-load-bearing or functional applications, engineering plastics can effectively reduce weight and simplify the manufacturing process.
Machinable plastic materials
- Polyethylene (PE)
- Polypropylene (PP)
- Polycarbonate (PC)
- ABS
- Polyethylene terephthalate (PET)
- Polyvinyl chloride (PVC)
These materials can be manufactured through CNC machining or 3D printing and are commonly used in automotive shells, supports, test components, and internal structural parts.
To improve the performance and appearance consistency of automotive parts in real-world use environments, we offer a variety of mature surface treatment and post-treatment processes.
Optional surface treatment methods
- Anodizing
- Powder coating
- Electroless nickel plating
- Polishing
- Insert installation
- Heat treatment
- Passivation
Surface treatment processes can be matched according to the part’s purpose, material type, and usage environment to improve corrosion resistance, wear resistance, or assembly performance.
Automotive Industry Application Examples
The automotive parts manufacturing industry is typically characterized by rapid development, multiple verification rounds, and frequent batch changes. Leveraging our combined manufacturing capabilities in CNC machining, sheet metal fabrication, and 3D printing, we provide practical parts manufacturing support for various automotive sub-sectors.
Prototyping and Engineering Verification
In the development phase of new car models and systems, it is crucial to quickly obtain testable physical parts.
Typical applications
- Structural and functional prototypes
- Assemble and verify parts
- Design iterative test components
By combining 3D printing with high-precision CNC machining, multiple rounds of design verification can be completed in a short time, shortening the overall development cycle.
Intermediate parts, replacement parts and small batch components
During the prototype manufacturing, testing, or later maintenance phases, there is often a need to deliver non-standard parts quickly.
Applicable Scenarios
- Intermediate and transitional components
- Replacement parts and repair parts
- Small batch functional parts
CNC machining and sheet metal processing can ensure the consistency of these parts in terms of size and performance.
Components related to autonomous driving systems
Autonomous driving systems have high requirements for the structural stability and assembly precision of components.
Typical parts
- Sensor mounting bracket
- Shell and structural components
- Components for testing and verification
These parts are typically made of aluminum alloy, steel, or engineering plastics, and are subject to strict dimensional checks and quality documentation.
Electric vehicle and charging system components
Electric vehicles and their supporting systems have placed new demands on lightweighting, structural strength, and safety.
Application Examples
- Structural components for electric vehicles
- Charging system components
- Electric vehicle battery testing components
By selecting appropriate materials and combining manufacturing processes, we can support the needs of the R&D verification and functional testing phases.
Production line tooling, fixtures and jigs
A stable production line cannot function without highly consistent tooling and fixtures.
Typical applications
- Assembly fixtures
- Inspection fixtures
- Auxiliary tooling for the production line
These parts typically require dimensional stability and high repeatability, making them suitable for CNC machining or sheet metal fabrication.
Commercial and multi-purpose vehicle parts
Commercial vehicles and multi-purpose vehicles have higher requirements in terms of structural strength and durability.
Applicable parts
- Structural support components
- Functional mechanical parts
- Customized installation components
During the manufacturing process, we focus on material strength, processing consistency, and durability.
Electric bicycle and electric scooter parts
The design of new modes of transportation emphasizes lightweight design and cost control.
Application scenarios
- Structural components and supports
- Housing and functional components
- Test and verification parts
By combining CNC machining and 3D printing, development efficiency can be improved while meeting performance requirements.
Revival of old technologies and replacement parts manufacturing
During the maintenance or technical upgrade of older models, original parts are often no longer available for direct purchase.
Application Examples
- Replacement manufacturing of discontinued parts
- Functional upgrade and modification parts
- We can manufacture replacement parts that meet the usage requirements based on existing designs or sample data.
Frequently Asked Questions
We ensure that parts meet automotive-grade standards through automotive industry certification systems, process quality control, and traceable quality documentation.
- The manufacturing process is carried out under the IATF 16949 and ISO 9001 quality management systems.
- Calibrated equipment is used in key manufacturing and testing processes.
- Implement key controls on important dimensions and functional features.
- Corresponding inspection and quality documents are available for all parts.
Whether a part meets automotive-grade standards depends on whether the manufacturing process is controlled, not just on the final inspection results.
Depending on the selected process, the machining accuracy is as follows:
- CNC machining: tolerances up to ±0.020 mm (±0.001 in)
- Sheet metal processing: tolerances up to ±0.1 mm (±0.004 in)
- 3D printing: Dimensional tolerance is ±0.3%, with a lower limit of ±0.3 mm (±0.012 in).
The specific accuracy will be evaluated and confirmed based on the part's structure, material type, and design requirements.
Automotive projects often involve undisclosed designs and core technologies. We provide comprehensive data and intellectual property protection measures within our platform and manufacturing network:
- The design documents are only for manufacturing of the corresponding project.
- Project information is stored and transmitted in a controlled environment.
- Internal processes ensure that design data is not accessed without authorization.
These measures are designed to ensure the security of customers' data during the research and development and manufacturing phases.
We support a variety of materials commonly used in the automotive industry, including:
Metallic materials
- Low carbon steel, stainless steel (304/304L, 316/316L, 430, 301)
- Alloy steel (4140, 4340), tool steel
- Aluminum alloys (6061-T6, 6063, 5052, 5083-H111, 2017, 7075-T651)
- Titanium alloys (Grade 1, Grade 2, Grade 5)
Engineering plastics
- PE, PP, PC, ABS
- PET, PVC
Materials can be manufactured through CNC machining, sheet metal processing, or 3D printing, depending on the purpose and performance requirements of the part.