Specification Review
Sheet metal forming press die
Resolve forming area, blank-holder hardware, punch force versus chamber pressure, and who owns tool development before you select a sheet metal forming press die supplier. A press-only leaflet does not set the die envelope. This page is a procurement dossier, not an engineering stamp or a compliance guarantee for the forming cell.
Decision dossier
Input checklist
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Input checklist: Design input
Collect the same package for every bidder: finished part drawing, alloy, temper, blank size, draw depth, and the forming area the tool must occupy. Photograph how blanks will be loaded onto the tray or bolster. If a hydroforming specification sheet is in the file, keep chamber pressure (bar or psi) and punch force (kN) on separate lines so nobody copies one onto the other. State quantity, destination and whether a recorded demonstration is required before shipment. Name who will own the final tool drawings after acceptance.
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Supplier answer
Each factory should name the die, punch and blank-holding components included in the quoted pack, the press envelope those tools need, and how force is controlled through the required forming stroke. Ask for a demonstration that records loading, blank-holder setting and thinning against the drawing revision. Require a statement on whether the first recipe still holds after a second die is set, including setup minutes and rejected starts. Optional automation or handling aids must be confirmed as installable on that tool, not assumed from a different press accessory list.
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Open deviation
Typical gaps: one bidder prices a development program while another prices a proven tool; another uses a sample blank thinner than your production lot; a third quotes empty-ram speed as output. Leave those as open deviations. Geographic search position is not evidence. Affiliation with any named OEM is not implied by citing public specification pages.
Pass criteria belong in the purchase contract: draw depth achieved, thinning limits named by the product engineer, wrinkle checks, and whether a repeat run after a tool change is included. Sample blanks must be production-intent, not easier coupons. If you later add a stamping die or a brake tool, that is a second RFQ. We can circulate a comparison of documents; we cannot certify the forming process or promise a percent cost reduction. Single-machine versus integrated-line scope should stay explicit: destackers and robots change staffing and acceptance boundaries. Nominal ram speed is not validated output. Machine price is not installed project cost until tooling, shipping, utilities, installation and spare parts are split. For manufacturer-side quote alignment see quote coordination.