Pressure Plate Clamping for Accurate Bearing Cage Pocket Machining
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Solution Overview
Problem
The existing methods for machining rolling bearing cages are inefficient due to the need for custom-designed clamping covers, manual clamping, difficulty in cooling the machining tool, and the risk of chip build-up and warping, which increase production costs and reduce machining accuracy.
Innovation Solution
A machine tool system with a clamping means featuring a pressure plate and pressure cylinders that can be adjusted to securely hold the workpiece in place, allowing for precise machining and improved cooling, while enabling the use of a single clamping system for various cage types and preventing warping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If custom-designed clamping covers with openings are used for each cage type, then the workpiece can be securely clamped during machining, but the design, manufacturing and storage costs increase significantly
Solution Approach 1:
The pressure plate is designed with a universal geometry that can accommodate multiple cage types and sizes. Instead of creating custom clamping covers for each cage variant, a single pressure plate design can be used across different applications by adjusting the clamping force and positioning, thereby reducing design, manufacturing and storage costs while maintaining secure clamping.
Solution Approach 2:
The invention allows for adjustable clamping parameters such as pressure magnitude and distribution through the pressure plate. By varying these parameters rather than changing the physical clamping cover structure, the same clamping device can effectively secure different cage types, reducing the need for multiple specialized components.
2Reliability
If manual clamping with clamping covers is used, then the workpiece can be held in position, but the time required to attach and detach the cover for each workpiece is appreciable
Solution Approach 1:
The invention replaces the manual mechanical clamping operation with an automated pressure application system. The pressure plate can be actuated through automated means (such as hydraulic or pneumatic systems integrated with the machining center), eliminating the need for manual attachment and detachment of clamping covers, thereby significantly reducing setup time while maintaining secure workpiece positioning.
Solution Approach 2:
The pressure plate system can be pre-positioned and pre-configured for different cage types, allowing for rapid adjustment rather than complete reattachment. The system enables preliminary setup where the clamping mechanism is already in place and only requires parameter adjustment, reducing the time required for each workpiece changeover.
3Ease of operation
If clamping covers with openings are used, then the machining tool can pass through to the workpiece, but optimal cooling of the tool cutting edges is difficult and chip build-up forms
Solution Approach 1:
The pressure plate design incorporates localized features such as cooling channels or fluid delivery paths that can be positioned to provide optimal cooling directly at the cutting zone. The plate's geometry can be tailored to direct coolant flow precisely where needed, improving thermal management of the cutting edges while maintaining tool access through the plate structure.
Solution Approach 2:
The pressure plate serves as an intermediary structure that facilitates both clamping and cooling functions. It can incorporate integrated cooling channels or act as a barrier that directs coolant flow to the cutting area, mediating between the need for tool access and the requirement for effective cooling, thereby preventing chip build-up and managing temperature.
4Productivity
If the rolling bearing cage is machined without adequate clamping pressure, then the machining process can proceed quickly, but the cage is prone to warping and torsion during machining
Solution Approach 1:
The pressure plate system enables dynamic adjustment of clamping pressure during the machining process. The clamping force can be optimized for each specific machining operation and cage type, providing sufficient pressure to prevent warping and torsion while allowing for efficient material removal. This dynamic control allows the system to maintain manufacturing precision without unnecessarily sacrificing productivity.
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 solution reduces design, production, and storage costs, minimizes setup times, enhances machining accuracy, and prevents chip build-up and warping, allowing for efficient machining of rolling bearing cages with improved precision and consistency.
Implementation Method 1
The receiving arrangement and the pressure plate are connected via at least one pressure cylinder. A contact pressure of the pressure plate on the workpiece can be adjusted in a defined manner by means of the at least one pressure cylinder.
Implementation Method 2
a pressure plate for pressing a workpiece on a workpiece support
Data Source
AI summary
A device for machining rolling element pockets in a workpiece includes a workpiece support, a main spindle, a clamping means fastened to the main spindle, a pressure cylinder and a machining tool. The clamping means includes a receiving arrangement for fastening the clamping means to the main spindle and a pressure plate for pressing the workpiece on the workpiece support. The pressure plate has a passage opening. The pressure cylinder connects the receiving arrangement to the pressure plate. The pressure cylinder is arranged to provide a force to adjust a contact pressure of the pressure plate on the workpiece. The machining tool is fastened to the main spindle and guidable through the passage opening to machine the workpiece.