NC Machining Program Creation with Automatic Grinding Allowance Adjustment

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Solution Overview

Problem

Existing methods for creating NC machining programs often result in errors due to manual calculation and data entry, particularly when incorporating grinding allowances, leading to unreliable programs and potential uncut portions during machining.

Innovation Solution

A method and apparatus that store and modify shape data to include grinding allowances, automatically adjusting for tool cutting edge radii and creating pecking-for-grinding shapes to eliminate uncut portions, with the ability to recognize and apply pecking types automatically.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual calculation and data entry are used to incorporate grinding allowances, then the operator can create NC machining programs, but errors in calculation and data entry occur, reducing reliability

Engineering Contradiction:

Improvereliability of NC machining programVSAvoidease of creating NC machining program

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The system automatically performs calculations and data entry for grinding allowances using the stored shape data and grinding allowance data, eliminating the need for manual operator intervention. The apparatus self-generates the corrected coordinate values and creates the NC machining program without human calculation or data entry, thus ensuring reliability while maintaining ease of operation.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces the manual mechanical process of calculation and data entry with an automated computer-based system. The shape data modification means automatically calculates the corrected coordinates by applying grinding allowance data to the stored shape data, substituting human operators with an automated computational system that eliminates calculation errors and data entry mistakes.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Manufacturing precision

If machining margins are removed by cutting, then the structure can be finished, but uncut portions remain due to tool cutting edge radius

Engineering Contradiction:

Improveprecision of machined surfaceVSAvoidease of removing machining margin

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The system performs preliminary action by automatically calculating and applying the necessary adjustments to the shape data before machining. The shape data modification means pre-computes the corrected coordinate values that account for the tool cutting edge radius, so that when the NC program is executed, the grinding allowance is properly established without leaving uncut portions, eliminating the need for additional manual intervention.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system incorporates feedback by using the tool cutting edge radius information to automatically adjust the shape data. The shape data modification means takes into account the tool characteristics and feeds this information back into the coordinate calculation process, ensuring that the machining program compensates for the tool radius effect and prevents uncut portions from remaining.

Inventive Principle:

Principle #23Feedback

3Productivity

If designers and CAD data operators manually calculate machining target dimensions with grinding allowance, then the NC machining program can be created, but time and effort are consumed

Engineering Contradiction:

Improvespeed of creating NC machining programVSAvoidtime for calculating and entering dimensions

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The apparatus performs self-service by automatically generating the machining target dimensions with grinding allowance incorporated. The shape data modification means takes the stored shape data and grinding allowance data, automatically calculates the corrected dimensions, and generates the NC machining program without requiring designers or operators to perform manual calculations or data entry, thus eliminating time loss and increasing productivity.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system uses copying by storing the original shape data and then creating a modified copy that incorporates the grinding allowance. The shape data modification means generates a corrected version of the shape data with the necessary adjustments already applied, allowing the NC program to be created directly from this modified copy without requiring manual recalculation of the original dimensions.

Inventive Principle:

Principle #26Copying

Data Source

PatentUS9268322B2Method and apparatus for creating numerical control machining program and program for causing computer to implement same method

Publication Date: 2016.02.23 MITSUBISHI ELECTRIC CORP

AI summary

An apparatus that creates, based on shape data of an object to be machined and grinding allowance data for the shape data, a numerically controlled machining program that has the grinding allowance data reflected in the shape data, is configured to include storing means 2 and 4 that store the shape data of the object to be machined and the grinding allowance data; a shape data modification means 5 that modifies the shape data to create, based on the grinding allowance data, shape data having a grinding allowance; and a numerically controlled machining program creation means 6 that creates a numerically controlled machining program for the modified shape data, with the apparatus enabling easy and efficient creation of a numerically controlled machining program having the grinding allowance reflected in the shape data.