Integrated Rotary Machining and Roller Burnishing for Worm Profiles

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Solution Overview

Problem

Existing devices for producing cylindrical worm profiles require complex and cumbersome transport routes between machining and post-processing stages, leading to inefficient processing and increased noise and roughness issues.

Innovation Solution

A compact machining device integrates both machining and finishing units with a common loading device, eliminating external transport and enabling rapid, precise processing with integrated surface treatment and quality control, utilizing whirling and roller burnishing methods for high-quality surface finishing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If machining and post-processing are performed in separate devices, then each device can be optimized for its specific function, but the transport route becomes long and complex, reducing productivity

Engineering Contradiction:
Improvesurface finish qualityVSAvoidprocessing efficiency
Core Design Contradiction:
Manufacturing precisionVSProductivity

Solution Approach 1:

The patent combines the machining device and post-processing device into a single integrated system. The machining unit performs rough machining of worm gear blanks, and the post-processing unit immediately follows with surface finishing operations, eliminating the need for external transport and enabling continuous processing without intermediate handling or repositioning.

Inventive Principle:
Principle #5Merging (Combining)

2Productivity

If a common loading device is used for both machining and post-processing, then device complexity is reduced and productivity increases, but the loading device must perform multiple functions

Engineering Contradiction:
Improveprocessing speedVSAvoidloading device functionality
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The loading device is designed as a universal component that serves multiple functions: it loads blanks into the machining unit, transfers machined blanks to the post-processing unit, and removes finished parts from the system. This multi-functional design eliminates the need for separate loading mechanisms for each processing stage.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Manufacturing precision

If machining is performed first followed by post-processing, then the basic profile is established, but the transport time between operations reduces overall efficiency

Engineering Contradiction:
Improveprofile accuracyVSAvoidtransport time
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

The machining operation is completed first to establish the basic worm gear profile and dimensions. Once machining is complete, the blank is immediately transferred to the post-processing unit without external transport, and surface finishing operations begin immediately, minimizing idle time and maintaining continuous production flow.

Inventive Principle:
Principle #10Preliminary action

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

This integration significantly reduces transport routes, enhances processing efficiency, and achieves high-quality surface finishes with precise quality control, improving smooth operation and noise reduction.

Implementation Method 1

the loading device expediently has a cooling device for cooling at least one blank received from the first device, expediently in the form of a fan that blows cooling air onto the blank

Methodology Applied
Scientific EffectForced Convection: Forced Convection

Data Source

PatentEP1747841B1Device for manufacturing metal parts, particularly cylindrical screw profiles, by rotary machining and rolling processing of cylindrical blanks
Publication Date: 2010.11.24 LEISTRITZ PRODUKTIONSTECHNIK GMBH
  • EP1747841B1 patent drawingFigure 1
  • EP1747841B1 patent drawingFigure 2
  • EP1747841B1 patent drawingFigure 3

AI summary

The device has a first machining unit (2) which cuts into cylindrical blanks (27,28) followed by a second machining unit (15) which finishes the surface of the machined blank (29,27) to form the finished part. A loading device (8) moves the blank from an associated magazine (25) to the first machining unit, from here to the second machining unit and then moves the finished part from here to the finished part pick-up (22). Parts of the loading device can be grippers (11,12). A cooling device (13) such as a blower can be provided on the loading device.