Forging Ram Drive Cams for Adjustable Stroke Speed
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Eccentric drives for forging rams require mass balancing and limit stroke speed, and existing solutions like sliding blocks on abutments necessitate spring pressurization for return strokes, complicating the forging process.
Innovation Solution
The use of a drive shaft with two 180° angularly offset, centrally symmetric drive cams allows for double stroke frequency and eliminates the need for mass balancing, enabling adjustable stroke velocity and efficient force transmission without spring pressurization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If eccentric drives are used for forging rams, then high pressure forces can be transmitted to the forging ram, but mass balancing is required and stroke speed is limited
Solution Approach 1:
The drive shaft is segmented into two separate drive cams instead of using a single eccentric mechanism. Each drive cam independently acts on its own forging ram, allowing the system to achieve force transmission without requiring mass balancing of a rotating eccentric mass. The segmentation of the drive function eliminates the need for complex mass balancing while maintaining effective force transmission to both rams.
2Force
If eccentric drives are used for forging rams, then high pressure forces can be transmitted to the forging ram, but the stroke rate is limited by the speed of the eccentric shaft
Solution Approach 1:
The drive cams are designed with variable geometry along their circumference, allowing the stroke velocity to be dynamically adjusted during the rotation of the drive shaft. The cam profile can be optimized to provide different stroke speeds during the forging stroke and return stroke, enabling higher stroke rates while maintaining effective force transmission. This dynamic control of stroke velocity breaks the limitation imposed by constant-speed eccentric shafts.
3Force
If a sliding block rests on an abutment of the forging ram, then high pressure forces can be transmitted, but the return stroke cannot be performed by the sliding block and spring pressurization is required
Solution Approach 1:
The drive cam is designed to automatically perform both the forging stroke and the return stroke without requiring external spring pressurization. The cam profile itself provides the necessary force to push the forging ram during the forging stroke and to return it during the return stroke. The sliding block simply follows the cam surface, and the cam's geometry ensures that the ram is returned to its initial position without needing additional pressurization mechanisms.
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 configuration enhances the efficiency of forging by allowing adjustable stroke speed and eliminating the need for mass balancing, while maintaining effective force transfer and reducing structural complexity.
Implementation Method 1
high pressure forces can be transmitted onto the abutment of the forging Rams via the drive cams
Data Source
AI summary
The invention relates to a forging apparatus, comprising forging rams (4) that are guided in the direction of stroke and accommodate forging tools (3), and lifting drives (7) which can be driven by a shaft (10) and which are supported in a non-positive manner on an abutment (12) of the forging rams (4) held under pretension in contact on the lifting drives (7). In order to provide simple constructional conditions it is proposed that the shafts (10) of the lifting drives (7) comprise two drive cams (11) which are angularly offset by 180° in relation to each other, are centrally symmetric with respect to the shaft axis, and cooperate with the abutments (12) of the forging rams (4).