Decoring Machine Vibration Isolation via Leaf Spring Suspension
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Solution Overview
Problem
Coring machines/vibrating machines have a short service life due to the exposure of gearboxes to strong vibrations and gyroscopic forces caused by rotating eccentric masses, leading to premature wear and reduced efficiency.
Innovation Solution
A coring machine design featuring a machine frame with a suspension system using a leaf spring and rotary bearing, allowing the workpiece carrier to rotate independently, reducing the need for the machine table to rotate and minimizing gyroscopic forces, along with a synchronization mechanism for eccentric masses driven by a single motor, and a coring hammer for effective core removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the machine table is rotated to tilt the cast workpiece, then the workpiece can be positioned for core removal, but gyroscopic forces are introduced into the machine table due to rotating eccentric masses
Solution Approach 1:
The system is divided into two independent rotational components: the machine table rotation for workpiece positioning and the workpiece carrier rotation for tilting. This segmentation allows each component to perform its specific function without interfering with the other, eliminating gyroscopic forces from the machine table while maintaining workpiece positioning capability.
Solution Approach 2:
Instead of achieving workpiece tilting through machine table rotation (one dimension), the invention introduces a second degree of freedom by adding workpiece carrier rotation about a horizontal axis. This dimensional change allows tilting to occur independently without affecting the machine table's rotational state, thus avoiding gyroscopic forces.
2Productivity
If the eccentric masses are rotated to excite oscillating movement of the machine table, then core removal function is achieved, but strong vibrations are generated causing short machine lifespan
Solution Approach 1:
The harmful vibrations and gyroscopic forces are extracted from the machine table structure by moving the eccentric mass rotation to the workpiece carrier. This separation allows the core removal function to continue while the machine table remains free from damaging rotational forces, extending machine lifespan.
3Stability of the object's composition
If a gearbox is used to synchronize the two eccentric masses, then synchronized rotation is achieved, but the gearbox is subjected to strong vibrations resulting in short lifespan
Solution Approach 1:
A synchronization belt is introduced as an intermediary element to replace the vibration-prone gearbox. The belt transmits rotational synchronization between the two eccentric masses mounted on the workpiece carrier without being subjected to the same vibration loads, thereby extending the synchronization mechanism's lifespan while maintaining synchronized operation.
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
The design extends the service life of the machine by reducing vibrations and gyroscopic forces, improving the efficiency of core removal, and allowing for flexible handling of various cast workpieces.
Implementation Method 1
the leaf spring being coupled to the machine frame at both its longitudinal ends and to the machine table at its longitudinal center by means of a swivel joint... the leaf spring is well-suited to absorbing vibrations
Implementation Method 2
the leaf spring is installed vertically in the core removal machine. This ensures that the leaf springs are primarily subjected to tensile/compressive or bending loads
Implementation Method 3
The swivel joints on which the leaf spring is mounted can be provided with a rubber buffer to compensate for any shortening of the leaf spring caused by deflection
Implementation Method 4
a first eccentric mass which is rotatably mounted on the machine table; a second eccentric mass which is rotatably mounted on the machine table, wherein the second eccentric mass is driven in the opposite direction to the first eccentric mass
Implementation Method 5
the eccentric masses used to excite the oscillating movement of the machine table
Implementation Method 6
The workpiece carrier is coupled to the machine table by means of a rotary bearing, wherein the rotary bearing is designed in such a way that the workpiece carrier is rotatably mounted about a horizontal axis of rotation relative to the machine table
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
The invention relates to a decoring machine (1) for decoring cast workpieces (2). The decoring machine (1) comprises: - a machine frame (3); - a machine table (6), which is coupled to the machine frame (3) by means of a mounting bracket (7); - a first eccentric mass (10), which is mounted in a rotatable manner on the machine table (6); - a second eccentric mass (12), which is mounted in a rotatable manner on the machine table (6), wherein the second eccentric mass (12) is driven in the opposite direction to the first eccentric mass (10); - a workpiece carrier (21) for receiving the cast workpiece (2) to be decored, wherein the workpiece carrier (21) is coupled to the machine table (6) by means of a rotary mounting (22), wherein the rotary mounting (22) is configured such that the workpiece carrier (21) is mounted so as to be rotatable about a horizontal axis of rotation (23) relative to the machine table (6).