Cylinder Head Combustion Chamber Digitizing With CNC Touch Probing
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Solution Overview
Problem
The existing methods for digitizing cylinder head combustion chambers are time-consuming and inefficient due to the need for multiple repositioning of the probe and reorientation of the CNC machine, as well as the transfer of the cylinder head between digitizing and manufacturing stages, which results in extraneous measurements and alignment issues.
Innovation Solution
A computer numerical control (CNC) machine system that integrates the digitizing process by using a touch probe to measure and generate probe measurement lines and planes for each portion of the combustion chamber, allowing for automated and efficient digitization by specifying top and valve planes, step angles, and step over distances, thereby reducing the need for extraneous measurements and streamlining the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional probe repositioning and reorientation methods are used to digitize combustion chambers, then measurement completeness is improved, but time consumption and process complexity increase significantly
Solution Approach 1:
The combustion chamber is divided into multiple measurement zones (intake valve region, exhaust valve region, piston crown region, etc.), and the probe automatically transitions between these segments using pre-defined measurement lines. This segmentation allows comprehensive coverage without manual repositioning, resolving the contradiction between measurement completeness and time consumption.
Solution Approach 2:
Measurement lines and measurement planes are pre-calculated and programmed before the actual digitizing process. The probe automatically follows these pre-defined paths, eliminating the need for manual repositioning and reorientation during measurement. This preliminary preparation resolves the time consumption issue while maintaining measurement completeness.
2Measurement precision
If multiple repositioning and reorientation operations are performed during digitizing, then all combustion chamber portions are captured, but device complexity and operation difficulty increase
Solution Approach 1:
The measurement process for different combustion chamber portions (intake valve, exhaust valve, piston crown) is merged into a single automated workflow. The probe systematically traverses all measurement lines and planes without requiring separate setup operations, reducing process complexity while maintaining digitization accuracy through unified measurement protocols.
Solution Approach 2:
The complex geometry of the combustion chamber is captured by copying measurement data onto standardized measurement planes and lines. This digital copying approach simplifies the physical measurement process, allowing accurate digitization without repeated manual repositioning and reorientation operations.
3Measurement precision
If cylinder head is transferred between digitizing and manufacturing stages, then specialized measurement can be performed, but alignment issues and time loss occur
Solution Approach 1:
The digitizing process is merged with the manufacturing process by performing measurements directly on the cylinder head in its final mounting position. The probe measures combustion chamber geometry in-situ without requiring transfer to separate measurement equipment, eliminating alignment issues and time loss while maintaining measurement accuracy through automated probe positioning.
Solution Approach 2:
The CNC machine tool is given multi-functionality by integrating both manufacturing capabilities and measurement capabilities. The same equipment used for machining can perform digitizing operations, eliminating the need for specialized separate measurement equipment and the associated alignment procedures. This universal approach resolves the contradiction between measurement accuracy and operational ease.
Data Source
AI summary
In one embodiment there is a computer numerical control machine implementing a method for measuring and digitizing a cylinder head combustion chamber using a touch probe, wherein the cylinder head combustion chamber includes an intake valve and an exhaust valve. The method includes receiving combustion chamber characteristics of the cylinder head combustion chamber. The method includes receiving probe measurement variables that describe how the touch probe measures the cylinder head combustion chamber. The method includes generating probe measurement lines for each portion of the cylinder head combustion chamber using the combustion chamber characteristics and the probe measurement variables. The method includes measuring, using the touch probe, probe measurement planes for each portion of the cylinder head combustion chamber using the probe measurement lines to generate probe measurements. The method includes digitizing the probe measurement planes for each portion of the cylinder head combustion chamber using the probe measurements.