Wheel Spinning Die With Slide Blocks for Reverse Draft Release
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Solution Overview
Problem
Traditional cold spinning dies for wheel hubs and rims face difficulties in die releasing due to reverse draft issues, leading to damage and deformation of the wheel blank, which affects production efficiency and yield.
Innovation Solution
A wheel spinning die design featuring an upper die, connecting sleeve, slide blocks, lower die, and central connecting block, where slide blocks form a circular ring and are inserted into an annular groove, allowing for vertical movement during die releasing, and a die releasing device with lifting components and pallets to lift the wheel blank, avoiding damage and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a reverse draft die is used at the joint between the cold spinning die and the wheel blank, then the die can be fixed securely during spinning, but the die cannot be released easily and causes damage to the wheel blank
Solution Approach 1:
The die is divided into two separate parts: a fixed die that remains stationary during spinning, and a movable die that can be easily removed after spinning. This segmentation allows the fixed die to provide secure fixing strength during the spinning process, while the movable die enables easy release without damaging the wheel blank.
2Ease of operation
If the central connecting block is used as an ejector rod to release the die, then die releasing can be achieved, but the front surface of the wheel blank becomes deformed
Solution Approach 1:
The ejection function is extracted from the central connecting block and assigned to a dedicated ejector mechanism. This allows the central connecting block to focus on its primary function of connecting the die parts, while the separate ejector mechanism handles die release without deforming the wheel blank's front surface.
3Ease of operation
If forced die releasing is used to remove the die, then the die can be removed from the wheel blank, but damage occurs to the die and the wheel blank
Solution Approach 1:
The die design incorporates dynamic elements that allow the movable die to be easily detached from the wheel blank after spinning. The dynamic mechanism enables smooth release without forced removal, preventing damage to both the die structure and the wheel blank while maintaining structural integrity.
Data Source
AI summary
Provided is a wheel spinning die wherein the plurality of identical slide blocks are connected end to end to form a circular ring, and the slide blocks are inserted into an annular groove between the side wall of a circular groove at the upper end of the lower die and the central connecting block; during spinning, each arc flange is clamped at the joint of an outer wheel lip and a rim under a spoke; and during die releasing, the slide blocks can move up and down together with the vertical movement of a wheel blank, so that the problem of releasing of a reverse draft die at the joint of the cold spinning wheel rim and the outer wheel lip can be solved, wheel damage caused by die releasing can be eliminated, and the yield and production efficiency of wheels are improved.