Scroll Compressor Groove Chamfering via Turning Guide
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Solution Overview
Problem
The existing methods for chamfering corners of workpieces in machining processes, such as scroll compressors, are costly and inefficient due to the need for specialized fixtures and tools, leading to increased production and maintenance costs, as well as reduced machining quality and efficiency.
Innovation Solution
The implementation of an annular groove formed by turning on the orbiting scroll of a scroll compressor, which replaces the traditional chamfering process using a milling tool, allowing for the same product function while reducing manufacturing and maintenance costs and improving machining efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional chamfering process using milling tool and specialized fixture is used, then chamfer can be formed to avoid assembly interference and stress concentration, but device complexity and manufacturing cost increase due to specialized fixtures and tools
Solution Approach 1:
The patent merges the chamfering function into the standard turning fixture by adding a simple guide plate with positioning groove, eliminating the need for specialized chamfering fixtures. The guide plate integrates positioning and guiding functions that were previously required by complex specialized fixtures, thereby reducing device complexity while maintaining assembly reliability.
Solution Approach 2:
The standard turning fixture is enhanced with a guide plate that provides multiple functions: positioning the workpiece, guiding the turning tool, and enabling chamfering operation. This universal fixture can handle both standard turning and chamfering operations, eliminating the need for separate specialized fixtures and reducing overall device complexity.
2Reliability
If traditional chamfering process using milling tool is used, then chamfer can be formed on workpiece corners, but productivity decreases due to additional machining time
Solution Approach 1:
The patent replaces the milling process (rotary cutting tool) with a turning process (linear cutting tool guided by guide plate). This substitution allows chamfering to be performed during the same setup as standard turning operations, eliminating the need for separate milling operations and significantly improving productivity while maintaining chamfer quality for assembly reliability.
Solution Approach 2:
The guide plate is pre-positioned on the fixture before workpiece installation, establishing the chamfering geometry in advance. This preliminary setup allows the turning tool to automatically generate the correct chamfer angle and depth during the turning operation, eliminating the need for separate chamfering operations and improving machining efficiency.
3Reliability
If traditional chamfering process using milling tool and fixture is used, then chamfer can be formed to eliminate stress concentration, but manufacturing cost increases due to specialized tools and fixtures
Solution Approach 1:
The patent uses a simple guide plate made from inexpensive material (such as aluminum alloy) that can be easily manufactured and replaced if needed. This cheap positioning component replaces expensive specialized fixtures and tools, significantly reducing manufacturing cost while maintaining the ability to produce accurate chamfers for stress concentration elimination.
Solution Approach 2:
The patent changes the machining parameter from milling (rotary tool motion) to turning (linear tool motion with workpiece rotation). This parameter change allows the use of standard turning tools and fixtures instead of specialized milling fixtures, reducing tooling costs while maintaining the structural reliability benefits of proper chamfering.
4Object-affected harmful factors
If traditional chamfering process using milling tool is used, then chamfer can be formed to prevent sharp corner injury, but time consumption increases due to additional machining processes
Solution Approach 1:
The patent merges the chamfering operation with the standard turning operation by using a guide plate that enables both operations with the same fixture and tool setup. This combination eliminates the need for separate milling operations, reducing machining time while still producing the safety chamfers needed to prevent sharp corner hazards.
Solution Approach 2:
The patent replaces the time-consuming milling process with a faster turning process enabled by the guide plate. The turning operation can remove material more efficiently for chamfer creation, reducing machining time while still effectively eliminating sharp corners to prevent injury hazards.
Data Source
AI summary
A scroll assembly includes an orbiting scroll and a cross ring. The orbiting scroll is configured to have a bottom plate. A plurality of bayonets and two positioning slots are provided on the outer peripheral surface of the bottom plate. The bayonets are adapted to be clamped by a chuck of a turning tool. The cross ring is configured to have an annular body and two positioning pins. An annular groove adapted for being formed by turning is provided on the lower surface of the bottom plate of the orbiting scroll, and a chamfer is formed on the edge of the annular groove formed by the intersection of the circumferential vertical surface of the positioning groove and the lower surface of the bottom plate.