Mandrels TRIZ Cases

A mandrel bar cooling zone with coolant damming limits rear-end overcooling, improving longitudinal temperature uniformity in seamless tube piercing.

Adjustable guide slides lock to fit different mandrel or driving bar diameters, cutting wear, tooling time, and maintenance in rolling mills.

Adjustable guide slides lock at preset positions to support mandrels and driving bars of different diameters with less wear and downtime.

Localized mandrel bar cooling and coolant damming keep hollow shell inner-surface temperature uniform during seamless pipe rolling.

Differential heat treatment hardens the piercer plug tip while keeping the trunk tough, reducing deformation, cracking, and coating peeling.

A tapered hole at the billet end spreads piercing stress in the Mannesmann process, reducing plug damage and inner tube surface flaws.

A 30 m mandrel-to-chuck layout lets a cold pilger mill roll longer hollows efficiently while maintaining tube wall and surface quality.

A turret drum with independently supported mandrels improves ring rolling precision and throughput while avoiding heavy rotary tables.

Reversing mandrel motion prevents acceleration-induced compression defects and eliminates downstream extraction equipment, maintaining dimensional quality.

A piercing mill tool substrate steel forms a net structure scale layer to prevent peeling and extend service life.

Controlling rotational frequency and roll diameter ratios suppresses shear deformation to prevent internal surface flaws in hollow shells.

Segmented nose caps with radial cooling outlets prevent clogging and reduce thermal loading on high-chromium steel seamless tube production.

Optimized oxide ratios in the arc-sprayed coating prevent inner surface flaws while avoiding ejection hole clogging.

Applying a boric acid lubricant to an arc-sprayed plug prevents seizing and extends tool life without reducing production efficiency.

A powder lubricant composition comprising sodium borate and cryolite forms a fluid film on pipe inner surfaces during elongation rolling.

Profiled hot work tool surfaces anchor multi-layer oxide coatings, preventing peeling under thermal stress to extend service life.

High-pressure water jets remove graphite lubricants from mandrel bars to prevent inner surface carburization in seamless pipe mills.

A piercing mill uses a specific plug nose rolling reduction ratio to prevent inner surface flaws in seamless pipes.

Controlled oxidation forms a porous outer scale layer on piercing plugs, enabling low-load peeling to prevent metal pipe surface defects.

Multi-softening glass frits in hot working lubricants maintain viscosity across temperature ranges to prevent surface flaws.

A temperature-dependent lubricant composition maintains friction protection at 80°C while dissolving below 40°C.

A nitrided rolling rod with specific hardness and yield strength enhances service life during stretch-forming operations.

A hot pipe making plug connects detachable pieces via a permanent magnet, enabling partial exchange of eroded tips while maintaining joint strength.