Centerless Grinding Loading Frame for Faster Workpiece Changeover
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Solution Overview
Problem
Centerless external cylindrical grinding processes face inefficiencies in workpiece changeover times due to the need for sequential actions to expel finished workpieces and insert new ones, which increases production time and requires additional handling tools.
Innovation Solution
A loading device with a receiving frame and displacement actuator for a plunge-cut grinding machine that allows for simultaneous axial displacement and gravity-induced insertion of new workpieces into the grinding gap, reducing the need for separate handling tools and expediting the workpiece changeover process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If sequential actions are used to expel finished workpieces and insert new ones, then the process is simple to control, but the workpiece changeover time increases
Solution Approach 1:
The receiving frame integrates multiple functions: it holds blank workpieces, positions them for insertion, and simultaneously expels finished workpieces. The conveying stop and positioning stop are combined in a single movable frame structure, allowing simultaneous execution of workpiece expulsion and new workpiece insertion operations.
Solution Approach 2:
The receiving frame pre-positions blank workpieces in a ready-to-insert state before the machining cycle completes. The positioning stop pre-establishes the correct axial position of workpieces in the receiving frame, so that when the frame moves into the grinding gap, the workpiece is already correctly positioned for immediate machining.
2Productivity
If a receiving frame is used for workpiece insertion and expulsion, then productivity increases, but the device complexity increases
Solution Approach 1:
The receiving frame serves multiple purposes: it acts as a storage container for blank workpieces, a positioning device with stops, a transfer mechanism via axial displacement, and an expulsion device through the conveying stop. This multi-functionality reduces the need for separate handling tools while maintaining high productivity.
Solution Approach 2:
The receiving frame is designed to be axially displaceable relative to the support body, allowing dynamic adjustment of its position. This dynamic capability enables the frame to move into and out of the grinding gap, facilitating both workpiece insertion and expulsion operations in a coordinated manner.
3Ease of operation
If the receiving frame is positioned offset from the support body, then workpiece insertion is simplified, but positioning precision may be compromised
Solution Approach 1:
The receiving frame acts as an intermediary between the support body and the grinding gap. It provides a stable platform for workpiece positioning with its positioning stop, while its axial displacement capability mediates the transfer of workpieces into the grinding gap without requiring direct positioning from the support body.
Solution Approach 2:
The offset positioning of the receiving frame replaces complex mechanical positioning mechanisms with a simpler axial displacement system. The positioning stop on the receiving frame provides precise axial positioning, while the frame's movement handles the lateral positioning requirement.
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 significantly reduces workpiece changeover time, enabling higher production volumes by allowing the next blank workpiece to be prepared and inserted while the current workpiece is being machined, and ensures precise positioning to prevent material waste and machine damage.
Implementation Method 1
The blank workpiece can, where necessary, fall by force of gravity out of the receiving frame into the grinding gap
Data Source
AI summary
A loading device for a plunge-cut grinding machine for centerless external cylindrical grinding includes a receiving frame, a support body, and a displacement actuator. The receiving frame is open in a gravitational direction and is for receiving a blank workpiece to be machined. The support body forms a support base for the blank workpiece. The displacement actuator is for axially displacing the receiving frame relative to the support body and into a grinding gap of the plunge-cut grinding machine. The receiving frame includes a conveying stop on an axially facing end face. The conveying stop is for axially expelling a final workpiece arranged in the grinding gap.