Cold Rolling Rack Inclination for Post-Hardening Profile Accuracy
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Solution Overview
Problem
Cold rolling machines often produce profiles that do not meet dimensional requirements after hardening, due to conical deformation or warp, which can result in profiles outside tolerance ranges.
Innovation Solution
A cold rolling machine with two tool units, each equipped with a cold rolling rack and a pivoting carrier, allows for adjustable inclination angles between the racks to compensate for potential conical deformations during hardening, ensuring the profile remains within predefined tolerance ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the workpiece is hardened after profile creation by cold rolling, then the torque-proof connection is strengthened, but the profile develops conical deformation or warp causing dimensional inaccuracy
Solution Approach 1:
The patent applies preliminary action by intentionally creating a counter-conical deformation during cold rolling that anticipates and compensates for the conical warp that will occur during subsequent hardening. The cold rolling rack is designed with a specific inclination angle to pre-distort the profile in the opposite direction of the expected hardening deformation, ensuring the final profile remains within tolerance after hardening.
Solution Approach 2:
The patent utilizes parameter changes by adjusting the inclination angle of the cold rolling rack profile based on the specific hardening process parameters (temperature, time, material properties). By varying the rack inclination angle as a controllable parameter, the system compensates for different degrees of hardening-induced deformation to maintain profile accuracy.
2Device complexity
If the cold rolling rack has a fixed inclination angle, then the device structure is simple, but the profile cannot compensate for hardening deformation
Solution Approach 1:
The patent applies dynamics by making the cold rolling rack inclination angle adjustable rather than fixed. The rack can be repositioned or reoriented to different inclination angles depending on the specific workpiece material, hardening process parameters, and desired compensation amount, allowing the system to adapt to varying conditions while maintaining profile accuracy.
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 machine effectively creates profiles that maintain desired dimensions after hardening by adjusting the inclination angle to prevent conical deformation, reducing waste and ensuring consistent production.
Implementation Method 1
at least a section of a workpiece is deformed and thereby a profile is created in the workpiece
Implementation Method 2
The workpiece is usually hardened
Data Source
AI summary
A cold rolling machine and method for producing a profile on a workpiece. The cold rolling machine having two constructed tool units. Each tool unit has at least one rolling rod extending in the longitudinal direction, a tool slide, a slide drive device, a pivoting carrier and a pivot drive. The at least one rolling rod is fastened to the tool slide and can be moved in the longitudinal direction by the slide drive device. The pivoting carrier can be pivoted about a pivot axis extending in the longitudinal direction by a pivot drive. The tool slide is arranged on the pivoting carrier. An angle of inclination can thereby be set between the two rolling rods, which angle of inclination can have, for example, a value of 0 degrees to 2.0 degrees or to 0.2 degrees. Conical profiles can thereby be produced in the workpiece.