Core Functions in a Robot System
Angular Transition Connection
The curved bracket provides a defined angular offset between two robot joint units, supporting the spatial arrangement of robotic arm segments at common deflection angles. This allows engineers to configure joint layout while minimizing mechanical interference during rotation.
Torque Transmission and Structural Support
The part acts as a load-bearing interface between joint modules. It withstands cyclic mechanical loads generated during limb movement, holds actuators and reduction units in alignment, and contributes to the overall stiffness of the kinematic chain.
Lightweight Mechanical Optimization
Made from 6061-T6 aluminum alloy, the bracket reduces moving mass compared with heavier steel alternatives. This helps lower motor load, improve system response, and support more dynamic robot motion.
Precision Mounting Interface
The machined hole positions and mounting features provide a consistent assembly interface, making the part suitable for prototype development, laboratory testing, and small-batch robot production.
CNC Machining Key Points
Material Selection
The bracket is made from 6061-T6 aluminum alloy, which offers good strength-to-weight ratio, machinability, and fatigue resistance. Material traceability and incoming quality control are important to avoid structural defects under repeated joint loading.
Dimensional and Geometric Tolerance Control
Critical dimensions, hole positions, flatness, and angular accuracy are controlled during CNC machining. General linear tolerances are managed within ±0.1 mm, while angular tolerances remain within ±0.5°. Mounting holes must be machined with high positional accuracy to ensure proper assembly and interchangeability.
Counterbore and Verticality Requirements
All countersunk holes for socket head cap screws must be machined accurately to ensure seating surface contact and assembly reliability. Verticality of the mounting holes is essential for consistent bolt loading.
Deburring and Edge Finishing
Sharp edges are removed after machining, and unmarked edges receive a C0.5 chamfer. This reduces stress concentration, prevents assembly damage, and improves both functional reliability and cosmetic finish.
Black Hard Anodizing
The surface is processed with black hard anodizing for improved wear resistance, corrosion protection, and a uniform appearance. The anodized layer should meet a minimum thickness requirement while remaining consistent in color and free from pitting or base-material exposure.
Pre-Compensation for Surface Treatment
Because anodizing introduces a thin dimensional change, CNC machining allowances are pre-compensated so that the final part still meets the required dimensions after surface treatment.
Cleaning and Process Control
Parts are thoroughly cleaned before anodizing to remove cutting fluid, oil, and machining residues. Poor cleaning can cause adhesion problems, surface defects, and inconsistent oxidation results.
Final Quality Verification
Finished parts undergo visual inspection, dimensional verification, and assembly compatibility checks. The goal is to ensure that each bracket is interchangeable, structurally reliable, and ready for robot integration.
Item | Specification |
|---|
Product Type | Arc-Shaped Joint Transition Bracket |
Material | 6061-T6 Aluminum Alloy |
Surface Treatment | Black Hard Anodizing |
Application | Humanoid robot joints, robotic arm segments, actuator mounting interfaces, prototype R&D |
Manufacturing Process | CNC milling, precision hole machining, deburring, anodizing |
Tolerance Level | General linear tolerance ±0.1 mm, angular tolerance ±0.5° |
Customization | Available |
MOQ | No MOQ |
Custom Manufacturing Service – No MOQ
We support flexible custom manufacturing for robot structural components, from single-piece prototyping to small-batch trial production. Whether you need a modified outline, adjusted hole pattern, different thickness, alternative aluminum material, or changed surface finish, we can work directly from your CAD file or engineering drawing.
Our service is particularly suitable for robotics startups, university laboratories, research institutes, and engineering teams that require fast iteration and responsive supply support. We provide design-for-manufacturability feedback before machining, helping you reduce unnecessary costs and improve part reliability.
Custom Capabilities
Custom machining based on CAD / STEP files
Material options including 6061-T6 and 7075-T6 aluminum alloy
Surface finish options such as black hard anodizing, clear anodizing, and bead blasting
Support for 1-piece prototype orders
Small-batch trial production
DFM review and engineering suggestions
Fast quotation and prototype lead time
Who This Part Is For
Humanoid robot R&D teams
Robotics startups
University robotics laboratories
Research institutes
Robotic arm integrators
Automation system developers
Maker communities and robotics competition teams
FAQ
Q: Can you produce this type of arc-shaped joint transition bracket according to my drawing?
A: Yes. We can produce precision-machined aluminum brackets based on your engineering drawing or CAD file.
Q: Do you accept small orders or one-piece prototyping?
A: Yes. We support custom CNC machining with no MOQ, including one-piece prototype orders for robot development and testing.
Q: Can the hole positions, thickness, or outer profile be modified?
A: Yes. Custom modifications are available to match your specific assembly requirements.
Q: What materials and surface finishes are available?
A: We typically work with 6061-T6 aluminum alloy, with 7075-T6 as an alternative. Surface finish options include black hard anodizing, clear anodizing, and bead blasting.
Q: How quickly can I get a prototype?
A: We can provide a fast quotation, and prototype lead time is typically 3 to 7 working days, depending on part complexity and order quantity.
