Agricultural Machinery Conveyor Bearing Housing Stamping Die

Product Detail:

1. Die Specifications & Technical Parameters

Die type: Multi-station progressive transfer die, incorporating drawing, piercing, trimming, and flanging stages.

Strip material: Mild steel (DC01–DC04) or high-strength low-alloy steel, thickness range 1.5–3.0 mm.

Press compatibility: Fits mechanical or servo presses from 200 to 400 tonnes, with a bed size up to 2500 mm.

Production speed: 12 to 20 strokes per minute, achieving an annual output capacity exceeding 500,000 housings.

Die dimensions: approx. 1200 × 900 × 600 mm, total weight around 2.8 tonnes.

Finished part tolerances: inner diameter concentricity ≤ 0.08 mm, flange flatness ≤ 0.1 mm.

2. Material & Heat Treatment of Critical Die Components

Punches and die inserts: DC53 cold-work die steel, vacuum hardened to HRC 60–62, cryogenically treated for dimensional stability.

Drawing rings and high-wear areas: Tungsten carbide (VG12 grade) sleeves shrink-fitted into steel housings, surface finished to Ra 0.05 µm to prevent galling.

Upper and lower die shoes: FC300 grey cast iron, stress-relieved, with a parallelism tolerance of 0.03 mm over 300 mm.

Guide pillars and bushings: SUJ2 bearing steel, hardened to HRC 60, arranged in a four-pin roller cage configuration for zero-clearance alignment.

Surface enhancement: TiCN PVD coating on drawing punches to reduce friction and extend regrind intervals to over 200,000 cycles.

3. Forming Process & Die Structure

The strip enters the die and first undergoes a cupping operation, where a blankholder controlled by programmable nitrogen gas springs prevents wrinkling.

Subsequent stations deepen the cup via reverse drawing, while the flange is coined flat. A piercing station punches bolt holes and a central shaft hole simultaneously, ensuring relative position accuracy.

Final stations trim the outer flange and perform a restrike/calibration operation to guarantee flatness.

Ejection is assisted by spring-loaded lifters and an overhead stripper plate; mis-feed is detected by induction sensors that instantly cut press power to protect tooling.

A centralised automatic lubrication system meters grease to guide elements and carbide rings every cycle.

4. Quality Assurance & Production Benefits

All die plates are measured on a coordinate measuring machine (CMM) before assembly; a trial run of 50 pieces verifies every critical dimension and burr condition.

The die is supplied with a complete spare parts kit (extra carbide inserts, springs, and sensors) and a QR code for traceability to manufacturing records.

By producing the bearing housing in one press line instead of casting plus machining, the customer achieves a 30% cost reduction and nearly double the throughput, with parts ready for conveyor assembly without secondary operations.