--- id: "assembly-capability-en" title: "Precision Parts & Product Assembly" description: "Zhongde Precision provides parts subassembly, press fitting, heat staking, torque fastening, final assembly, inspection, packing and batch traceability." source: "/en/assembly-capability" language: "en" generated: true --- # Precision Parts & Product Assembly Subassembly · Press Fit · Heat Staking · Torque Fastening · Inspection From subassembly, press fitting, heat staking and controlled fastening to final assembly, inspection, packing and traceability, we support precision machinery, robotics, electronics and custom industrial products. - Parts and module subassembly - Press fitting, heat staking and fastening - Final assembly, inspection and traceability ## Key Figures ### Parts and functional modules Subassembly ### Fixture-assisted joining Press Fit · Staking ### Standardized tightening control Torque Fastening ### Assembly · inspection · packing Integrated ## 01. From Parts Subassembly to Final Assembly Based on product structure, BOM, assembly sequence and quality requirements, we provide parts subassembly, functional module assembly, final product assembly, inspection and packing, integrated with molding, machining and surface treatment operations. ### Capabilities #### 01. Parts Subassembly Machined, molded, die-cast and standard parts are assembled into independent functional units. ##### Details - Machined parts - Molded parts - Standard parts #### 02. Module Assembly Shafts, bearings, gears, fasteners, motors and structural parts are assembled into functional modules. ##### Details - Shaft systems - Motor units - Structural modules #### 03. Final Assembly Final products are assembled according to the BOM, work sequence and standardized instructions. ##### Details - BOM control - Standard work - Final assembly #### 04. Inspection & Packing Appearance, dimensions, movement, fastening, packing protection and traceability are confirmed. ##### Details - Visual inspection - Function check - Traceability ## 02. Assembly & Joining Processes According to part structure, material, joining method and quality requirements, we configure manual assembly, torque fastening, press fitting, riveting, heat staking and fixture-assisted workstations, followed by inspection, packing and batch traceability. ### Manufacturing Processes #### 01. Precision Manual Assembly Manual assembly of small parts, springs, bushings, seals and complex structures. ##### Details - Small parts - Springs & seals - Complex structures #### 02. Torque Fastening Electric or pneumatic tools are used for controlled screw fastening and tightening. ##### Details - Torque control - Tightening sequence - Missing-screw prevention #### 03. Press Fit & Riveting Positioned press fitting and riveting of bearings, bushings, pins and structural parts. ##### Details - Press force - Insertion depth - Riveting #### 04. Heat Staking Stable thermal joining of plastic posts, metal inserts and molded structures. ##### Details - Temperature - Cycle time - Staking height #### 05. Fixture-Assisted Assembly Positioning, error-proofing, clamping and guiding fixtures improve consistency. ##### Details - Positioning - Error proofing - Clamping #### 06. Inspection & Packing Appearance, movement, fastening, identification, packing and traceability are confirmed. ##### Details - Visual & motion - Fastening check - Packing records ### Process Configuration Workstations and joining methods are configured according to product structure, production volume, critical quality requirements and the required level of automation. Critical parameters such as press force, torque, temperature and height can be controlled and recorded. ## 03. Core Equipment & Flexible Assembly Workstations Multiple assembly, press-fit, heat-staking and fastening systems are combined with modular workstations, positioning fixtures and standardized operations to support different products and production volumes. ### Engineering Items #### 01. Semi-Automatic Press-Fit Station Positioned press fitting and semi-automatic assembly of bearings, bushings, pins and structural components. ##### Key Items - Force control - Accurate positioning - Stable output #### 02. Four-Column Heat Staking Machine Temperature, pressure and cycle-time control provide stable joining of plastic posts, inserts and structures. ##### Key Items - Temperature - Cycle time - Height consistency #### 03. Torque Fastening Station Electric or pneumatic fastening tools control tightening sequence, torque and missing-screw risks. ##### Key Items - Torque control - Sequence control - Error prevention #### 04. Precision Press-In Equipment Precision insertion of bearings, bushings, pins and small structural parts with consistent depth and position. ##### Key Items - Precision pressing - Force monitoring - Stable process #### 05. Flexible Assembly Area Collaborative workstations support high-mix, low-volume production and efficient product changeovers. ##### Key Items - Flexible output - Team workflow - Fast changeover #### 06. Modular Assembly Workstations Modular stations, material containers and auxiliary tools support standardized work and flexible expansion. ##### Key Items - Modular design - Quick adjustment - Flexible expansion ## 04. From Material Confirmation to Packing A controlled assembly workflow covering engineering review, material verification, workstation preparation, standardized assembly, inspection and batch traceability helps reduce incorrect assembly, missing parts and material-mixing risks. ### Process Steps #### 01. Engineering & BOM Review Confirm drawing revision, BOM, assembly sequence, critical dimensions and quality requirements. #### 02. Material & Parts Verification Verify in-house parts, purchased parts, standard parts, cosmetic parts and packing materials. #### 03. Fixture & Station Preparation Prepare positioning fixtures, error-proofing tools, press-fit tools and work instructions. #### 04. Subassembly & Final Assembly Complete fastening, press fitting, heat staking and module assembly according to standard work. #### 05. Inspection & Function Check Inspect assembly dimensions, fastening, movement, appearance and required functional items. #### 06. Packing & Traceability Record batch, inspection and product data, followed by scratch- and impact-resistant packing. ### Workflow Control Critical torque, press-fit depth, heat-staking height, assembly clearance and functional movement can be managed through inspection standards, first-piece confirmation and batch records. ## 05. Assembly Quality and Process Controls Critical assembly characteristics are controlled through BOM revision management, standardized work, process parameters, error-proofing fixtures and batch traceability. ### Six Engineering Controls #### 01. BOM and Revision Control Confirm drawing revisions, BOM structure, part numbers and engineering changes. ##### Key Items - Revision - ECN - Part consistency #### 02. Assembly Sequence and SOP Perform assembly according to documented work instructions. ##### Key Items - SOP - Standard work - Sequence #### 03. Torque and Fastening Control Control fastening parameters, screw specifications and tightening sequence. ##### Key Items - Torque - Missing screws - Thread protection #### 04. Press Force and Insertion Depth Manage force, depth and perpendicularity during precision press fitting. ##### Key Items - Force - Depth - Perpendicularity #### 05. Fixture Error Proofing Use positioning fixtures and poka-yoke features to control part orientation. ##### Key Items - Fixtures - Poka-yoke - Orientation #### 06. Function Check and Traceability Record assembly results, inspection status and product batch data. ##### Key Items - Function - Batch records - Traceability ### Assembly CTQ Matrix #### Fastening TORQUE CONTROL ##### Engineering Items - Torque - Missing screws - Floating screws - Thread damage - Screw specification #### Press Fit PRESS FIT ##### Engineering Items - Press force - Insertion depth - Perpendicularity - Deformation - Loosening #### Heat Staking HEAT STAKING ##### Engineering Items - Temperature - Time - Height - Joint appearance - Joint strength #### Final Assembly FINAL ASSEMBLY ##### Engineering Items - Clearance - Movement - Abnormal noise - Appearance - Part completeness #### Packaging PACKAGING ##### Engineering Items - Quantity - Label - Orientation - Protection - Batch record ## 06. Applicable Components & Product Types Suitable for multi-level assembly needs from precision sub-assemblies and functional modules to final product assembly, covering robotics, liquid cooling, optical communication, electronics, and custom industrial products. ### Engineering Items #### Precision Mechanical Components Suitable for sub-assemblies and functional assemblies built from shafts, sleeves, brackets, housings, and standard parts. Sub-assemblies / Functional units / Standard hardware #### Robot Joint & Actuator Assemblies Suitable for fastening, press-fit, heat staking, and final assembly of joint modules, actuator sub-assemblies, and transmission units. Joint modules / Actuators / Transmission units #### Liquid Cooling Accessories & Modules Suitable for cooling plate accessories, fluid connectors, sealing units, and other liquid-cooling related functional modules. Cooling accessories / Sealed connections / Functional modules #### Optical Module Structural Assemblies Suitable for small precision assembly and inspection of heat sinks, housings, brackets, and optical communication structural parts. Structural parts / Thermal parts / Precision assembly #### Electronic Equipment Structural Assemblies Suitable for assembly and poka-yoke confirmation of enclosures, frames, connection structures, and insert-related parts. Enclosures / Structural frames / Mixed-material assembly #### Custom Industrial Products & Final Assemblies Suitable for custom industrial product assembly and packaging according to BOM, assembly sequence, and work instructions. Module assembly / Final assembly / Inspection & packing ## RFQ Requirements and FAQ ### 07. Information Required for Assembly Quotation Complete RFQ information supports an accurate review of assembly feasibility, process planning, inspection requirements, lead time and pricing. #### Engineering Items ##### Drawings & BOM Part / assembly / exploded drawings / revision ##### Assembly Sequence Fastening / press fit / heat staking / steps ##### Material Sources In-house / customer-supplied / purchased / standard ##### CTQ & Inspection Torque / press force / function / appearance ##### Quantity & Lead Time Sample / pilot / production / schedule ##### Packing & Traceability Labels / barcodes / batches / protection ### 08. Common Engineering Questions #### Engineering Items ##### What levels of assembly can you support? We support component sub-assemblies, functional modules, subsystem assembly and final product assembly. Scope depends on BOM completeness, part sourcing, joining processes, inspection requirements and delivery format. ##### Can you source purchased and standard parts? We can assist with screws, bearings, seals, connectors and other standard parts. Specified brands and critical functional parts require clear model numbers, supplier requirements and substitution rules. ##### How do you prevent incorrect or missing assembly? Controls include BOM and revision management, material segregation, defined assembly sequence, positioning fixtures, poka-yoke fixtures, first-piece approval and in-process inspection. ##### How are screw torque and fastening quality controlled? Screw specification, torque range and fastening sequence are defined, followed by checks for missing, floating, stripped or loose screws and the final assembled condition. ##### How are press fitting and heat staking controlled? Press fitting focuses on force, depth, perpendicularity, deformation and loosening. Heat staking focuses on temperature, time, height, joint appearance and connection strength. ##### Can you support functional inspection and traceability? Dimensional, movement, appearance, fastening and required functional checks can be performed, with batch, inspection, label and product traceability records.