Cylinder Bore Laser Machining With Local Particle Extraction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for surface processing of engine block piston raceways require large air flows and high energy expenditure for particle removal, leading to high investment and operating costs, as well as potential contamination risks.
Innovation Solution
A device comprising a hollow rod-shaped processing tool with a reflector and suction system that allows for efficient purging gas supply and removal of particles by using a suction system sealed to the cavity opening, reducing the need for large vacuum sources and enabling direct particle extraction through the cylinder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If large air flows are generated by suction to remove particles efficiently, then particle removal efficiency is improved, but vacuum source size and energy consumption increase
Solution Approach 1:
The invention extracts and removes particles directly at the generation site through a suction device positioned at the cavity opening, preventing particles from dispersing into the surrounding environment. This localized extraction approach maintains high particle removal efficiency while reducing the overall air flow volume that needs to be processed, thereby lowering energy consumption and vacuum source size requirements.
Solution Approach 2:
The invention introduces a purge gas as an intermediary medium that flows through the cavity and carries particles toward the suction device. This purge gas stream acts as a mediator that facilitates particle transport without requiring large volumes of suction air, thus improving particle removal efficiency while reducing the energy demand on the vacuum system.
2Speed
If large vacuum sources are used to generate sufficient air velocity for particle transport, then particle transport capability is improved, but investment costs increase
Solution Approach 1:
The invention concentrates the air velocity requirement locally at the particle generation and removal site rather than requiring high velocity throughout the entire system. The suction device is positioned to create focused high-velocity air flow exactly where particles need to be entrained and removed, while the overall system can operate with lower average velocities, reducing vacuum source size and investment costs.
Solution Approach 2:
The invention utilizes pneumatic principles by introducing purge gas that flows through the cavity and combines with the suction flow to create efficient particle transport. This pneumatic approach allows for effective particle removal using moderate vacuum pressures, avoiding the need for large, expensive vacuum sources while maintaining sufficient air velocity for particle entrainment.
3Productivity
If purge gas is introduced through the machining tool and extracted at the cavity opening, then particle removal efficiency is improved, but system complexity increases
Solution Approach 1:
The machining tool is designed with multi-functionality, serving both as the laser processing instrument and as the purge gas delivery conduit. By integrating the gas supply function into the existing machining tool structure, the system achieves improved particle removal efficiency without adding separate complex gas delivery systems, thus minimizing overall system complexity.
Solution Approach 2:
The invention merges the purge gas delivery system with the machining tool structure, combining multiple functions (laser delivery and gas flow) into a single integrated component. This consolidation simplifies the overall system architecture by eliminating the need for separate gas delivery infrastructure, reducing system complexity while maintaining effective particle removal.
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 significantly reduces suction volume flow, lowers energy consumption, and minimizes contamination risks by allowing for cost-effective and efficient particle removal directly through the cylinder, reducing the size of vacuum equipment and filtration needs.
Implementation Method 1
Abrasive processes, such as laser radiation, can be used to structure the surface
Implementation Method 2
A reflector element is inserted into a cavity within a protective tube, allowing the surface to be structured by means of a laser and the reflection of the laser
Implementation Method 3
suction extraction is often a suitable option. A negative pressure is used to generate a gas stream, such as an air stream, which is suitable for carrying the particles along and transporting them away from the site of removal
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a method for machining the surface of a cavity, particularly a piston track of a cylinder of an internal combustion engine block (50), according to which the cavity is provided, a machining tool (20) is inserted into the cavity, and the surface of the cavity is machined using the machining tool (20). Furthermore, a flushing gas (30) is introduced into the cavity and a suction system is connected to an opening in the cavity in order to suck out flushing gas (30) and particles that may have been produced during the machining.