Trimming Press Cutting Blade Liquid Pressure Mechanism

Solution Overview

Problem

Existing trimming press working apparatuses often produce burrs and chips during cutting, leading to unreliable severing of scrap pieces and quality issues in hood or door panel products, as they rely on tension shear or tear rupture.

Innovation Solution

A trimming press working apparatus that uses a liquid pressure generating means to impart a cutting force to a movable cutting blade, eliminating tension shear and tear rupture, and allowing simultaneous cutting along a trimming line and subsequent severing into scrap pieces without producing burrs or chips.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If tension shear or tear rupture is used to sever scrap pieces, then the cutting process can be completed, but burrs and chips are produced and severing reliability is reduced

Engineering Contradiction:

Improvecutting completionVSAvoidsevering reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The invention separates the cutting process into two distinct stages: first, the trimming cutting blade cuts along the trimming line to separate the product portion from the non-product portion; second, the scrap cutting blades sever the non-product portion into multiple scrap pieces. This segmentation eliminates the need for tension shear or tear rupture, preventing burr and chip formation while ensuring reliable severing of scrap pieces.

Inventive Principle:

Principle #1Segmentation

2Productivity

If tension shear or tear rupture is used to sever scrap pieces, then the cutting process can be completed, but chip occurrence is unavoidable

Engineering Contradiction:

Improvecutting completionVSAvoidchip occurrence

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The invention separates the cutting process into two distinct stages: first, the trimming cutting blade cuts along the trimming line to separate the product portion from the non-product portion; second, the scrap cutting blades sever the non-product portion into multiple scrap pieces. This segmentation eliminates the need for tension shear or tear rupture, preventing burr and chip formation while ensuring reliable severing of scrap pieces.

Inventive Principle:

Principle #1Segmentation

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The apparatus reliably severs non-product portions into scrap pieces without burrs or chips, ensuring high-quality product surfaces by eliminating the need for tension shear or tear rupture.

Implementation Method 1

a liquid pressure generating means (81) for imparting to the cutting blade a cutting force based on compressible liquid pressure

Methodology Applied

Scientific EffectHydraulic pressure: Hydraulic Press

Data Source

PatentEP2735385B1Trimming press working apparatus

Publication Date: 2017.02.22 OILES CORP

AI summary

A trimming press working apparatus 1 includes a trimming means 6 for cutting a plate material 2 along a trimming line 5 which divides a product portion 3 from a non-product portion 4 in the plate material 2; a scrap cutting means 9 for cutting the non-product portion 4 along scrap severing lines 7 each intersecting the trimming line 5 to make the non-product portion 4 into a plurality of scrap pieces 8; and a pad 10 for pressurizing and restraining the product portion 3 of the plate material 2.