Crank Press Machine Oscillation Control via Segmented Motion Patterns

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Solution Overview

Problem

Existing press machines require a lengthy and complex input process for operators due to the increasing number of input items in motion data, leading to reduced efficiency and increased time for oscillation processes, and they struggle to maintain a constant oscillation frequency and pressing load, which affects productivity and processing quality.

Innovation Solution

The press machine generates motion patterns based on simplified input data, allowing for oscillation processes without return operations, reducing the number of input items and maintaining a constant oscillation frequency, thereby enhancing operator efficiency and productivity while minimizing wear on molds and preventing workpiece damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If the number of drive-in operations and return operations is increased to achieve better molding results, then the molding precision is improved, but the number of input items in motion datum increases, making operator work more complicated and time-consuming

Engineering Contradiction:

Improvemolding precisionVSAvoidoperator work complexity

Core Design Contradiction:

Manufacturing precisionVSEase of operation

Solution Approach 1:

The motion datum is segmented into two distinct parts: oscillation datum (containing oscillation-related parameters) and regular pressing datum (containing positioning and speed parameters). This segmentation allows the oscillation process to be independently configured without increasing the complexity of the entire motion datum structure, as the oscillation parameters are separated from the basic pressing parameters.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system dynamically generates the complete motion pattern by combining the oscillation datum with the regular pressing datum through automated calculation. The controller automatically determines the slide position and speed at each oscillation cycle based on the simplified oscillation datum, eliminating the need for operators to manually input detailed position and speed data for each operation.

Inventive Principle:

Principle #15Dynamics

2Manufacturing precision

If the number of drive-in operations and return operations is increased, then the molding precision is improved, but the time for operator input increases

Engineering Contradiction:

Improvemolding precisionVSAvoidoperator input time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system performs preliminary calculation of the complete motion pattern automatically. The controller pre-calculates the slide position and speed for each oscillation cycle based on the oscillation datum, so that when the oscillation process executes, the detailed motion parameters are already prepared and无需 real-time calculation or manual adjustment during the actual pressing operation.

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If return operations are included in the oscillation process, then the slide can be returned upward, but the oscillation frequency cannot be maintained constant and pressing load varies

Engineering Contradiction:

Improveslide motion flexibilityVSAvoidoscillation frequency stability

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

Instead of using traditional return operations to raise the slide and maintain oscillation frequency, the invention inverts the approach by using a crankshaft mechanism that continuously rotates in one direction. The slide's oscillating motion is generated through the geometric relationship between the crankshaft rotation and the connecting rod, eliminating the need for upward return movements while maintaining constant oscillation frequency and stable pressing load throughout the oscillation cycle.

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentEP1918091B1Pressing machine, crank pressing machine, and vibration processing method in these machines

Publication Date: 2017.03.08 AMADA HOLDINGS CO LTD

AI summary

A press machine includes: an electric motor (19) for raising and lowering a slide (11) by rotating a crank shaft (13); motion datum receiving means (29) through which, by an input operation, an operator inputs a motion datum including, as input items, height positions at which the slide (11) starts and ends an oscillation process, a speed at which the slide (11) carries out the oscillation process, an angle at which the crank shaft (13) is rotated in a direction during a drive-in operation, and an angle at which the crank shaft (13) is rotated in the other direction during a return operation; motion pattern generating means (63) for generating a motion pattern of the slide (11) on the basis of the motion datum inputted through the motion datum receiving means (29); and motor controlling means (73) for controlling the electric motor (19) on the basis of the motion pattern generated by the generating means (63).