Spring-End Grinding Machine Temperature Control
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Solution Overview
Problem
The existing methods for grinding spring ends of helical compression springs face challenges in achieving high productivity while maintaining the quality and preventing overheating, which can lead to material damage and reduced performance.
Innovation Solution
A method and machine that utilize real-time temperature monitoring and control during the grinding process, allowing for optimal adjustment of grinding parameters such as infeed speed and cooling air flow to maintain the spring material at a safe temperature, thereby maximizing productivity without overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If grinding speed and infeed rate are increased to improve productivity, then manufacturing output increases, but spring material temperature rises causing overheating and material damage
Solution Approach 1:
The patent implements a temperature monitoring system that continuously measures the temperature of spring material during grinding and feeds this information back to the control unit. The control unit automatically adjusts grinding parameters (infeed rate, wheel speed) based on the temperature feedback to maintain optimal grinding conditions without overheating, thus resolving the contradiction between productivity and temperature control
Solution Approach 2:
The system dynamically changes grinding parameters (infeed rate, wheel speed, depth of cut) based on real-time temperature conditions. When temperature rises, the system automatically reduces infeed rate or wheel speed to lower the temperature, allowing sustained high productivity while preventing material damage from overheating
2Temperature
If cooling air flow is increased to prevent overheating, then temperature control improves, but energy consumption increases
Solution Approach 1:
The cooling air flow rate is made dynamic rather than constant. The system adjusts cooling air flow based on real-time temperature measurements and grinding parameters - increasing cooling when temperature rises and reducing it when temperature is stable, thereby preventing overheating while minimizing unnecessary energy consumption during normal operation
Solution Approach 2:
The temperature monitoring system provides feedback that controls not only grinding parameters but also cooling air flow. The control unit modulates cooling air delivery based on temperature feedback, ensuring adequate cooling only when needed, thus resolving the contradiction between temperature control and energy efficiency
3Productivity
If grinding pressure is increased to improve material removal rate, then productivity increases, but temperature rise accelerates leading to reduced machining time window
Solution Approach 1:
The system dynamically adjusts grinding pressure (through infeed rate control) based on real-time temperature conditions. When temperature approaches critical levels, the system automatically reduces infeed rate to lower grinding pressure and cooling, extending the usable machining time window while maintaining optimal average productivity throughout the process
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 enables continuous high-performance grinding with reduced risk of overheating, maintaining the quality of the spring ends and extending the machine's lifespan with minimal maintenance.
Implementation Method 1
a temperature signal representing a temperature is determined by a temperature measurement during a grinding operation
Implementation Method 2
cooling air flow to maintain the spring material at a safe temperature
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a method for grinding spring ends of helical compression springs (F) using a numerically controlled spring-end grinding machine (100) having a grinding unit (120), a loading unit (150) and a control unit (160) for controlling the loading unit (150) and the grinding unit (120). The grinding unit (120) has a grinding disc pair with two rotatable grinding discs (130, 140), between which a grinding space (135) is formed. The loading unit (150) has at least one loading plate (160, 170), which is rotatable substantially axially parallel to the grinding discs (130, 140) and has a plurality of off-axial spring receptacles (166), each for receiving a respective helical compression spring (F). During a grinding operation, helical compression springs (F) received in spring receptacles (166) are successively transported through the grinding space between the rotating grinding discs (130, 140) by rotation of the loading plate (160, 170) and in the process both spring ends of the helical compression springs (F) located in the grinding space are simultaneously machined by grinding. The method is characterized in that a temperature signal representing the temperature is determined on at least one of the helical compression springs (F) by a temperature measurement during the grinding operation. The spring-end grinding machine (100) is preferably controlled on the basis of the temperature signal. In one embodiment, the temperature is measured using a thermal imaging camera (190). The temperature measuring device (190) is arranged in a cooling air supply duct (200) belonging to a cooling device and/or in a cooling air stream generated by the supply duct (200).