Chuck Front-Body Correction for Precise Workpiece Centering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing chuck systems face challenges in accurately aligning the center of a workpiece with the rotation center of the chuck due to differences in the clamping surfaces and the positions where forming plugs are clamped, leading to potential shifts during workpiece attachment.
Innovation Solution
A chuck correction method involving the movement or tilting of the front body relative to the rear body within the chuck, while maintaining the workpiece's position, to adjust the radial alignment and ensure precise matching of the workpiece center with the chuck's rotation center, utilizing guide bars, adjustment bolts, and a damper mechanism to achieve accurate clamping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the clamping surfaces of jaws are machined while clamping forming plugs, then the rotation centers of chucks and the centers of workpieces coincide with high accuracy, but the centers of workpieces may be slightly shifted from the rotation centers of chucks when workers attach workpieces to chucks
Solution Approach 1:
The chuck body is divided into a rear body and a front body that can move relative to each other in the radial direction. This segmentation allows independent adjustment of the front body's position to correct center alignment errors without affecting the overall chuck structure or requiring jaw reformation.
Solution Approach 2:
The invention performs preliminary correction of the front body's position relative to the rear body before actual workpiece clamping. By adjusting the front body radially while the workpiece is already clamped, the system pre-corrects alignment errors that would otherwise require jaw reformation.
2Ease of operation
If a clamping portion is provided in the draw bar, then the jaw is separated from a chuck body to a front of the chuck axis, but the center of the workpiece tends to shift from the rotation center of the chuck
Solution Approach 1:
The front body is designed to be movable relative to the rear body in the radial direction, creating a dynamic adjustment mechanism. This allows the front body to be shifted radially to compensate for center alignment errors caused by jaw separation, maintaining accurate workpiece positioning despite operational flexibility.
3Measurement precision
If the front body is moved or tilted relative to the rear body, then the accuracy of matching the workpiece center with the rotation center is improved, but the device complexity increases
Solution Approach 1:
The front body is nested within the rear body structure, with the plunger mechanism housed inside the body. This nested arrangement allows the correction mechanism to be integrated within the existing chuck structure, minimizing additional complexity while enabling radial movement and tilting of the front body.
Solution Approach 2:
The plunger mechanism serves multiple functions: it drives the jaws for clamping workpieces and simultaneously enables radial movement of the front body for center correction. This multi-functionality reduces the need for separate correction mechanisms, thereby limiting the increase in device complexity.
Data Source
AI summary
The present disclosure improves the accuracy of matching the center of the workpiece with the rotation center of the chuck. It provides a chuck correction method for a chuck including a body, a plunger, and jaws, the body including a rear body and a front body provided in a front side of the rear body, the plunger provided inside the body and configured to move along an axis of the body, and the jaws each configured to move in a radial direction of the axis while guided by the front body along when the plunger moves, the chuck correction method including: a correction step including moving the front body in the radial direction of the axis with a position of the rear body keeping with respect to the axis in a state that a workpiece is clamped in the jaws.