Rolling Element Guide Rail Panel Machining for High Load Capacity
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Solution Overview
Problem
Existing rolling element guide rails face challenges in achieving high load capacity and cost-effective manufacturing, with limitations in precision and service life due to material constraints and manufacturing processes.
Innovation Solution
The solution involves manufacturing rolling element guide rails from high-strength materials like rolling bearing steel or ceramics using profile grinding and hard milling processes, incorporating fracture grooves for cost-effective production and precise mounting, and employing parallel machining with breakable webs to achieve high load ratings and extended service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If high-strength materials like rolling bearing steel or ceramics are used to ensure high load capacity and long service life, then the load-bearing capacity and durability are improved, but the manufacturing cost and machining difficulty increase significantly
Solution Approach 1:
Multiple rolling element guide rails are machined simultaneously as a single panel unit using profile grinding processes. This merging approach allows synchronous machining of several high-strength material components in one operation, significantly reducing manufacturing time and cost while maintaining the high load-bearing capacity required for each individual guide rail
Solution Approach 2:
Fracture grooves are incorporated as predetermined breaking points between adjacent rolling element guide rails in the panel. These grooves create segments that can be easily separated after machining, allowing individual guide rails to be released from the panel without complex cutting operations. The grooves have considerably lower material thickness compared to the profile bodies, enabling clean separation while preserving the integrity of each guide rail's load-bearing surfaces
2Productivity
If multiple rolling element guide rails are machined together as a panel to reduce manufacturing cost, then productivity increases, but the complexity of separating individual rails and maintaining profile geometry precision increases
Solution Approach 1:
Fracture grooves are machined into the panel during the profile grinding process itself, creating predetermined breaking points before the rails need to be separated. This preliminary action ensures that when bending forces are applied during separation, the rails break cleanly at the grooves without damaging the profile geometry of the rolling element running surfaces or guide surfaces, eliminating the need for complex post-machining separation operations
3Ease of manufacture
If fracture grooves with low material thickness are used to enable easy separation, then the ease of manufacture is improved, but the structural integrity of the guide rail may be compromised
Solution Approach 1:
The fracture grooves are designed with considerably lower material thickness compared to the profile bodies, but only in the specific regions where separation is needed between adjacent guide rails. The rolling element running surfaces, guide surfaces, and overall profile geometry maintain their full required thickness and strength. This local quality differentiation allows easy separation at the grooves while preserving the structural integrity and load-bearing capacity of the functional surfaces
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 approach results in rolling element guide rails with increased load capacity and extended service life, while reducing production costs and improving precision, exceeding ISO standard load ratings by up to 25% and doubling service life compared to conventional methods.
Implementation Method 1
carrying out a first grinding operation on an upper side of the material blank facing away from the underside with a profile grinding wheel
Data Source
AI summary
Rolling element guide rail for a linear rolling bearing, having a profile body on which at least one rolling element running surface extends along a straight line of movement with a constant profiling and is designed for a rolling movement of a rolling element, and on which two guide surfaces each extend along the straight line of movement with a constant profiling and are designed to be accommodated in a guide groove of a bearing housing, a breaking edge being formed on at least one of the guide surfaces.