Spherical Oscillating Grinding Device for Bowling Balls
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Solution Overview
Problem
Conventional grinding machines for spherical products, such as bowling balls, are inefficient and prone to producing uncontrolled grinding patterns with parallel scratches, leading to uneven surfaces and potential form defects, which affect the ball's grip and rotation.
Innovation Solution
A grinding device with a spherically oscillating clamping plate that allows for neutral orientation of the grinding pattern, eliminating parallel scratches by using a freely spinning or oscillating clamping plate synchronized with the grinding machine's eccentric drive shaft, ensuring even and accurate surface grinding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional grinding machine with rotating grinding units is used, then the grinding operation can be performed, but the effective grinding bearing surface is reduced and the ball must be rotated for a long period of time
Solution Approach 1:
The invention uses a spherical grinding head that contacts the ball surface, allowing the grinding surface to conform to the spherical geometry of the ball. This increases the effective grinding bearing surface area compared to conventional rotating cup grinders, enabling more material removal per unit time and reducing the overall grinding duration.
2Productivity
If a rotating grinding tool is used, then grinding can be performed efficiently, but parallel grinding scratches are produced within the same area leading to uncontrolled orientation
Solution Approach 1:
The invention employs an oscillating mechanism that superimposes a reciprocating motion on the rotational movement of the grinding head. This dynamic combination ensures that the grinding contact point continuously changes position and orientation on the ball surface, preventing the formation of parallel scratches and producing a uniform, neutral surface pattern.
Solution Approach 2:
The oscillating mechanism introduces periodic reciprocating motion to the grinding head, causing the grinding contact point to move back and forth across the ball surface in a controlled manner. This periodic action ensures even distribution of grinding pressure and eliminates directional scratch patterns, resulting in a uniform surface finish.
3Ease of operation
If manual grinding is performed by hand, then flexibility is achieved, but it is difficult to decide whether an even result has been obtained and form defects may occur
Solution Approach 1:
The invention incorporates automatic control mechanisms including sensors that detect the ball's rotation and position, automatically adjusting the grinding head's oscillation amplitude and frequency to maintain optimal grinding conditions. This self-regulating system ensures consistent surface evenness without requiring manual intervention or expertise, while preserving operational flexibility.
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 solution provides an efficient and reliable grinding process that maintains the spherical geometry of the product, ensuring an even surface structure without orientation issues, improving the ball's performance by eliminating parallel scratches and stabilizing the grinding machine's operation.
Implementation Method 1
a spherical oscillation, with a clamping plate (6) driven by the grinding machine (1), wherein the grinding machine (1) is provided with an eccentric drive shaft (4)
Implementation Method 2
grinding out this in order to obtain a surface layer that is as flawless as possible
Data Source
AI summary
The present invention relates to a method and an arrangement for grinding spherical products (12), such as e.g. bowling balls, in particular. Such an arrangement comprises at least one grinding machine (1) having a spherically oscillating grinding movement. A fastening plate (6) fitted on the grinding machine has a spherically shaped bearing surface (7) and a grinding product (9) fitted on this, which through its slits (13) adopts a position with accuracy of shape on the spherically shaped surface. The grinding product (9) will form a contact surface (17) in the interface, in which the grinding product cooperates with the spherical product. This contact surface then adopts a radius of curvature arranged to substantially correspond to the radius (r) of the spherical product (12). The grinding is performed with a spherically oscillating grinding movement, which is adapted to the radius of the spherical product and simultaneously coincides with the radius of curvature of the contact surface.