Bending Machine Cutting Device Segmentation

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Solution Overview

Problem

Existing bending machines for materials in wire, rod, or strip form, such as those used for producing stirrups in reinforced concrete construction, face issues with uncontrolled movement of cut-off pieces during high-speed cutting, making manual handling dangerous and preventing automated removal and precision guides.

Innovation Solution

A bending machine design featuring a pivotable feed device with a lever arm and swivel drive, allowing controlled pivoting movement between the cutting device's knife and counter-knife, along with a holding device near the counter-knife to stabilize cut-off pieces, enabling full automation and precision guides.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the knife and counter knife move at high relative speed for efficient cutting, then cutting productivity increases, but the cut-off piece is thrown uncontrollably

Engineering Contradiction:

Improvecutting speedVSAvoidcontrol of cut-off piece

Core Design Contradiction:

ProductivityVSStability of the object's composition

Solution Approach 1:

The cutting device is segmented into two independent parts: a stationary counter knife mounted on the support frame and a movable knife mounted on the pivoting feed device. This segmentation allows the counter knife to remain fixed while the knife moves, achieving high-speed cutting without throwing the cut-off piece uncontrollably.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of having both cutting elements move relative to each other, the invention inverts the conventional approach by making one element (counter knife) stationary and the other (knife) movable. This inversion stabilizes the cutting point and prevents uncontrolled movement of the cut-off piece while maintaining high cutting speed.

Inventive Principle:

Principle #13The other way round (Inversion)

2Device complexity

If manual handling of cut-off pieces is used, then equipment complexity is reduced, but safety hazards increase due to uncontrolled movement

Engineering Contradiction:

Improvehandling systemVSAvoidsafety hazard

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The invention converts the potentially harmful uncontrolled movement of cut-off pieces into a beneficial controlled ejection mechanism. The cut-off pieces are intentionally designed to be ejected in a predictable direction and location, transforming a safety hazard into a manageable ejection process that enables safe automated handling.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Manufacturing precision

If guide devices are installed near the bending head to improve precision, then bending precision increases, but installation is prevented by uncontrolled cut-off piece movement

Engineering Contradiction:

Improvebending precisionVSAvoidinstallation of guide devices

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The invention implements preliminary action by stabilizing the cutting process and controlling cut-off piece ejection before the material reaches the bending head. This preliminary control creates a stable environment that enables the subsequent installation and effective operation of guide devices near the bending head for improved precision.

Inventive Principle:

Principle #10Preliminary action

4Adaptability or versatility

If the feed device is made pivotable to enable cutting, then cutting functionality is achieved, but uncontrolled movement and stability problems occur

Engineering Contradiction:

Improvecutting functionalityVSAvoidstability of feed device

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The invention merges the pivotable feed device with a stationary counter knife mounted on the support frame. This combination allows the feed device to pivot for cutting functionality while the stationary counter knife provides a fixed reference point, stabilizing the overall cutting system and preventing uncontrolled movement.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentEP3439806B1Bending machine

Publication Date: 2019.11.20 PROGRESS HLDG

Figure 1a~1b
Figure 2~3
Figure 4~5

AI summary

The invention relates to a bending machine (1) for wire-, rod-, or strip-shaped material (2), in particular for producing bows for reinforced concrete construction, comprising a carrier frame (11, 12), at least one bending head (3), at least one supply device (4), by means of which the material (2) to be bent can be supplied to the at least one bending head (3), and a cutting device (5), which is arranged between the at least one bending head (3) and the at least one supply device (4) and is formed by at least one blade (6) and at least one counter-blade (7), wherein the at least one blade (6) and the at least one counter-blade (7) can be moved in relation to each other, wherein the at least one counter-blade (7) of the cutting device (5) is arranged at a first distance (44) from the bending head (3) and is immovably connected to the carrier frame (11, 12), and the at least one blade (6) of the cutting device (5) is arranged on a device (4) that can be moved in relation to the carrier frame (11, 12), wherein the movable device (4) has a second distance (45) from the bending head (5), which is greater than the first distance (44) of the at least one counter-blade (7) from the bending head (3).