Lower Die Block: V-opening Sizes 6-50 mm, Height 80-200 mm

Component Specifications

Definition

The lower die block is a precision-machined component in a V-die set that serves as the foundation for bending operations. It provides a stable, rigid platform that supports the die insert and maintains alignment with the upper punch during the bending cycle. Typically mounted to the press bed, it features precisely machined surfaces, mounting holes, and alignment features to ensure accurate part formation and repeatability in industrial metal fabrication processes.

Working Principle

The lower die block operates on the principle of providing a fixed, rigid reaction surface against which sheet metal is formed. When the upper punch descends, it forces the workpiece into the V-opening of the die insert mounted on the lower block, creating plastic deformation along a predetermined bend line. The block's mass and rigidity absorb bending forces while maintaining dimensional stability and alignment throughout the production cycle.

Materials

Typically manufactured from high-strength alloy steel (AISI 4140, 4340) or tool steel (D2, A2) with hardness ranging from 40-55 HRC. May include surface treatments like nitriding or chrome plating for wear resistance.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Height	80-200 mm
Standard Width	100-300 mm
Surface Finish	Ra 0.8-1.6 μm
Standard Length	500-3000 mm
V Opening Sizes	6-50 mm
Flatness Tolerance	±0.05 mm/m
Mounting Hole Pattern	Standard T-slots or threaded holes

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

DIN 55201, ISO 12165

Parent Products

This component is used in the following industrial products

V-Die Set

A specialized tooling assembly used in press brakes to create precise V-shaped bends in metal sheets.

View Product Details

Engineering Analysis

Risks & Mitigation

Wear and deformation from repeated loading
Misalignment causing part defects
Fatigue cracking in high-cycle applications
Surface damage from abrasive materials

FMEA Triads

Trigger: Excessive loading beyond design capacity
Failure: Plastic deformation or cracking of the block
Mitigation: Implement load monitoring systems and adhere to manufacturer's tonnage limits

Trigger: Improper alignment during installation
Failure: Uneven wear and poor part quality
Mitigation: Use precision alignment tools and follow installation procedures

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.1 mm for critical dimensions, ±0.05 mm for alignment features

Test Method

Coordinate measuring machine (CMM) verification, surface plate inspection, hardness testing per ASTM E18

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Lower Die Block

Manufacturer profiles associated with Lower Die Block.

Sourcing Lower Die Block from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Related Components

Upper Tool (Punch)

Upper Tool (Punch) is the active forming component in metal plate bending machines that applies precise downward force to create bends in sheet metal.

Main Frame

The main frame is the primary structural component of a hydraulic press, providing rigidity and stability to withstand high compressive forces during metal forming operations.

Shaft Bearing

Precision component supporting rotating shafts in vibration motors to reduce friction and maintain alignment.

Seal Groove

Precision-machined groove in aluminum bearing housings designed to accommodate sealing elements for fluid containment and contamination prevention.

Frequently Asked Questions

What is the difference between a lower die block and a die insert?

The lower die block is the main structural component that mounts to the press bed, while the die insert is the removable component that fits into the block and provides the specific V-opening geometry for bending.

How often should lower die blocks be inspected for wear?

Regular visual inspections should occur daily, with detailed dimensional checks every 500 operating hours or as specified by the manufacturer based on material thickness and production volume.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Lower Die Block