Three-Chamber Spring End Grinding for Dust Containment and Cooling
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Solution Overview
Problem
Grinding machines face challenges in productivity, occupational safety, and energy efficiency due to the spread of grinding dust and exhaust air, as well as complex cooling systems, particularly in spring end grinding machines where thermal management and dust containment are inadequate.
Innovation Solution
A grinding machine design featuring a three-chamber structure – an inner chamber, an intermediate chamber, and an outer chamber – with a shielding device and pivotable intermediate doors to contain dust and sparks, and integrated cooling systems for effective cooling of workpieces and grinding wheels, allowing for improved airflow and reduced dust deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a single-chamber design is used, then the device complexity is low, but grinding dust and sparks spread uncontrollably into the loading area
Solution Approach 1:
The grinding chamber is divided into three separate chambers (first chamber for grinding zone, second chamber as intermediate zone, third chamber for loading area) separated by first and second shielding devices. This segmentation contains grinding dust and sparks within the first chamber while allowing the loading plate to move through the second chamber, preventing contamination of the loading area.
Solution Approach 2:
The second chamber functions as an intermediary zone between the grinding zone and loading area. The loading plate moves through this intermediate chamber which is sealed off from both the grinding zone and the loading area, acting as a buffer that prevents direct exposure of the loading area to grinding contaminants.
2Ease of operation
If the loading plate is accessible during grinding, then the ease of operation is high, but occupational safety is compromised due to sparks and dust
Solution Approach 1:
The chamber system separates the loading operation from the grinding operation spatially. The loading plate can be loaded and unloaded in the third chamber which is sealed off from the grinding zone by the first shielding device, allowing continuous operation while protecting operators from sparks and dust generated in the first chamber.
Solution Approach 2:
The second chamber serves as an intermediate passage that allows the loading plate to move between the grinding zone and loading area without exposing the loading area to grinding contaminants. This intermediary zone maintains operational continuity while ensuring occupational safety.
3Temperature
If cooling fluids are supplied to the grinding zone, then the temperature control is improved, but the loss of substance increases due to fluid consumption
Solution Approach 1:
A cooling air supply unit provides cooling fluid to the grinding zone through the shielding device. The cooling air flows through channels in the first shielding device to cool the grinding wheel and workpiece, then exits through the second shielding device into the second chamber where it can be managed and potentially recirculated, reducing overall fluid consumption.
Solution Approach 2:
The shielding devices serve multiple functions: they separate the chambers to contain dust and sparks, and simultaneously provide pathways for cooling air to reach the grinding zone. This multi-functionality eliminates the need for separate cooling system components, reducing overall system complexity and fluid loss.
4Productivity
If the intermediate chamber is sealed, then the productivity is improved by continuous operation, but the device complexity increases due to door mechanisms
Solution Approach 1:
The first and second shielding devices are designed to be movable rather than fixed. The first shielding device can move to allow loading plate insertion into the first chamber, and the second shielding device can move to allow cooling air passage and loading plate exit. This dynamic design enables continuous operation while maintaining chamber seals, balancing productivity with manageable complexity.
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 design enhances productivity by minimizing dust and heat exposure, extends tool life, and improves occupational safety by containing hazardous particles, while optimizing energy use through targeted cooling and efficient airflow management.
Implementation Method 1
a cooling air supply unit which supplies cooling air to the grinding zone (15)
Implementation Method 2
the first shielding device (38) having a first cooling air outlet (38c) through which the cooling air can be directed into the grinding zone (15)
Implementation Method 3
The friction work performed between the surface of the workpiece and the grinding wheel generates heat
Data Source
Figure 1A~1b
Figure 1c
Figure 2
AI summary
Grinding machine (1), in particular spring end grinding machine, comprising: a rotary table (10) rotatably mounted about a rotary axis (A), at least one loading plate (11) for loading workpieces (12), in particular coil springs, wherein the loading plate (11) can be moved from a loading position (L) to a grinding position (S) by rotating the rotary table (10), a grinding unit (13) with at least one grinding wheel (14), wherein the grinding wheel (14) comes into grinding contact with at least one workpiece (12) in a grinding zone (15) when the loading plate (11) loaded with workpieces is in a grinding position (S), a grinding chamber (16) enclosing the grinding zone (15), wherein an inner chamber (36) at least partially enclosing the grinding zone (15) and an intermediate chamber (37) can be separated from each other by a shielding device (38), at least one outer chamber (17) at least partially enclosing the intermediate chamber (37). encompasses,wherein the intermediate chamber (37) has at least one intermediate door (18) that separates the outer chamber (17) from the intermediate chamber (37).