Custom Sheet Metal Bending Services

ShincoMetal manufactures custom bent sheet metal components for equipment and assemblies in China. Send us your finished-part drawing and CAD model so the material, geometry, functional dimensions, and quantity can be reviewed together.

A bend that looks straightforward in a flat pattern may be limited by flange support, tooling access, springback, or the order in which features are formed. We review the complete part rather than treating thickness or bend count as the only measure of feasibility.

Is Your Part a Fit?

ShincoMetal bends mild steel, annealed 304 stainless steel, and 5052-H32 aluminum, with a preliminary thickness screening range of 1–6 mm for each material. Feasibility also depends on bend length, inside radius, flange dimensions, and tooling access.

Maximum bend length: up to 3,000 mm for suitable material and thickness combinations. Actual capacity depends on forming force, tooling, and part geometry and is confirmed during drawing review.

Use these ranges for initial screening. Final acceptance follows a review of the complete formed part, including return flanges, deep sections, short legs, holes near bends, and clearance throughout the bend sequence. Identify critical assembly dimensions and visible surfaces so these requirements can be reviewed before quotation.

Materials, Radii, and Flat Patterns

Material selection affects more than the finished appearance. Alloy or grade, temper or strength, grain direction, thickness, and inside radius should be considered together. For example, 5052-H32 aluminum is generally more suitable for tight forming than 6061-T6; stainless steel often requires greater forming force and springback allowance than comparable mild steel. The appropriate choice still depends on the specific part and forming route.

A flat pattern should be developed for the intended tooling and material. Bend allowance and bend deduction connect the blank to the finished dimensions, while the K-factor is an empirical input rather than a universal material constant. If you supply a DXF flat pattern, include the finished-part model and drawing so its assumptions can be checked.

How the Bending Route Is Chosen

Air bending forms an angle by controlling punch penetration while the sheet is supported on the die shoulders. The die opening, material behavior, and setup influence the resulting angle and radius. Bottom bending and coining involve greater contact or pressure and may reduce springback, but neither supports a blanket accuracy promise for every part.

For each drawing, the manufacturing route should account for tool clearance, flange support, the order of bends, and the location of cosmetic faces. Short flanges may need a different die or a design change. Holes near bends can distort, and adjacent flanges may need relief to prevent tearing or bulging.

ShincoMetal uses CNC press brake bending with V-dies and suitable punches for the part types described on this page. Any specialist forming or outsourced operation should be identified during quotation.

Fit, Appearance, and Inspection

The acceptance criteria should follow the part’s function. An angle measurement alone may not establish whether a bracket or enclosure fits its assembly. The drawing should identify critical flange heights, hole positions, datums, parallelism, twist, and any mating surfaces that need closer control.

ShincoMetal checks bend angles, flange lengths, hole positions, and overall dimensions using angle gauges, calipers, and other suitable measuring tools against the approved drawing. If material certificates, first-article inspection, traceability, or inspection records are required, state them in the RFQ so their availability and scope can be confirmed before an order.

Tooling may leave witness lines. Mark visible faces on the drawing and provide an appearance reference where finish quality matters. Protective film, die protection, or alternative tooling may help, but the suitable method depends on the material and part.

Related Operations and Production Planning

Bent parts may also require cutting, deburring, inserted hardware, welding, finishing, or assembly. Their sequence can affect final fit: installed hardware may obstruct a bend, welding can introduce distortion, and coating thickness may change the fit of holes or mating faces.

ShincoMetal can supply laser cutting, welding, deburring, surface finishing, and assembly as part of a quoted scope, with in-house and outsourced operations identified during quotation. Prototype and repeat-production quantities should be stated separately so setup, design maturity, inspection, and release pattern can be considered for each stage.