Custom Fabrication
We manufacture welded metal assemblies and assemble hardware components in Hangzhou, China. We review how your parts locate, join and fit before quoting. Choose a welded subassembly or discuss a mechanical assembly with the hardware, finish and checks your order requires.
Service scope
Choose the delivery state that suits your product, then confirm the interfaces, hardware and inspection points before production begins.
Joining service
We join sheet metal parts to make brackets and other weldments defined by your drawing. Review the weld locations, access to each joint and the mounting faces that need to stay aligned. For recurring orders with accessible joints, we can review whether robotic welding suits the part and its fixture.
Discuss a Welded Assembly
Assembly service
We assemble hardware components such as gate hinge and latch assemblies. The assembly drawing and bill of materials define how the parts go together and which hardware ships loose. Specify any mating clearance, moving parts and checks that matter before packing.
Gate hardware assembly and packing example
Discuss Hardware AssemblyDrawing review
Define the reference faces and functional features that control the finished unit, not just the separate components.
| What needs to work | What to specify and check |
|---|---|
| A welded bracket must sit flat | Identify the mounting face and its flatness requirement. Review the locating points and check the face after the weldment has cooled. |
| Holes must line up across two parts | Dimension the hole pattern from the assembly reference face. Agree whether to check the separate parts, the welded unit or both. |
| A hinge or latch needs to move freely | Define the closed position, travel and clearance. Check the movement of a representative assembly with the specified hardware. |
| A weld sits on a visible surface | Show which welds will be visible and specify the required appearance or blending. Review acceptance before finishing the part. |
| A coated part fits against a tight interface | Identify the contact faces, threads and mating dimensions. Agree which surfaces are coated or masked and whether fit is checked after finishing. |
Share your assembly drawing and mark the features that control fit.
Submit Drawings for ReviewDelivery planning
We can review cutting, forming and joining as part of one drawing-based project. Decide which operations we should include and which parts your team will fit later. When finishing is part of the order, we coordinate it with partner factories and review how it affects mating surfaces and final assembly.
| Delivery condition | When to choose it | Confirm before approving the quote |
|---|---|---|
| Welded subassembly | Your team will fit it into a larger product or complete later work. | Welded joints, finished geometry, supplied hardware and the condition of exposed surfaces. |
| Mechanically assembled unit | You need specified components and hardware fitted before shipment. | Parts list, orientation, fastening details, clearance and any agreed movement checks. |
| Assembled parts with installation hardware packed separately | The main unit is assembled, and mounting hardware is fitted at the job site. | Which items are fitted, what ships loose, counts per set and how the parts are identified in the pack. |
Before you order
Review it when the same joints recur across batches and the parts can be located consistently in a fixture. Joint access, part variation and the expected order quantity affect the choice. Share the joint layout and batch forecast so we can review whether the geometry suits our robotic welding setup.
Welding and cooling can change flatness, angles or hole alignment. Identify the faces and dimensions that control the finished assembly, and specify where they should be measured. Joint layout, locating fixtures and weld sequence can affect the result. Where a critical dimension is hard to hold, discuss the joint layout or a follow-on operation during drawing review.
A welded joint can suit a permanent connection when the materials, access and finished geometry allow it. Mechanical fastening may suit parts that need to be removed, adjusted or replaced later. Compare access for the welding torch or installation tool, how much space the joint takes and how the product will be serviced.
The assembly drawing shows the orientation, joints, interfaces and dimensions that control fit. The bill of materials lists each part, revision and quantity, including fasteners and hardware packed separately. Add a weld symbol or project specification where required, and mark whether any dimensions apply after welding, coating or final assembly.
Start with the features used at installation. Check mounting faces and hole alignment, then review accessible welds against the agreed appearance criteria. For moving hardware, verify that the part opens, closes or travels as specified. If the order requires a formal inspection record or a specified weld inspection method, include the requirement in the quote request so its scope can be agreed.
Cost depends on part count, joint access, fixture needs, assembly time and batch size. Finishing, supplied hardware, inspection and protective packing can also change the quote. Compare offers against the same drawing revision, parts list and delivery condition.
Repeat-order review
Our Hangzhou workshop carries out welding and hardware assembly. Use the first unit to confirm the mounting interfaces, weld appearance and any moving hardware before the next batch. Keep the drawing revision, bill of materials and packing configuration together so repeat orders can be checked against the same requirements.
Project enquiry
Send your drawing, parts list and order quantity. Identify the material, joints and mounting features that matter. Tell us which parts should arrive assembled, what should ship loose and whether finishing or inspection needs to be included.
You can also email your drawing to susan@hzjiansen.com.
Phone: +86 137 3588 7730
