Workpiece Holder Clamping Structure for Non-Parallel Surfaces
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Solution Overview
Problem
Existing workpiece holder devices face challenges in precise machining of workpieces with non-plane-parallel clamping surfaces, leading to potential tilting or movement in the radial direction, which compromises machining accuracy and introduces deformation.
Innovation Solution
The workpiece holder device features a two-part clamping element design with movable parts, a spherical bearing, and adjustable contact surfaces, allowing for variable angles and force-locking mechanisms to ensure precise alignment and secure clamping without radial movement, utilizing a combination of mechanical and fluid spring elements for alignment and locking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rigid clamping element design is used, then the structure is simple and manufacturing is easy, but machining precision deteriorates due to inability to compensate for non-parallel clamping surfaces
Solution Approach 1:
The clamping element is divided into two separable parts: a first clamping element part and a second clamping element part. This segmentation allows each part to be independently adjusted and positioned, enabling compensation for non-parallel clamping surfaces while maintaining overall structural simplicity
Solution Approach 2:
The clamping element transitions from a rigid fixed structure to a dynamic adjustable structure. The second clamping element part can be moved relative to the first part along the clamping direction, allowing the system to adapt to varying workpiece surface geometries and maintain precise clamping
2Adaptability or versatility
If clamping surfaces are not plane-parallel, then the device can accommodate varying workpiece tolerances, but radial movement and tilting occur compromising machining accuracy
Solution Approach 1:
The movable connection between the two clamping element parts provides a feedback mechanism. When clamping forces are applied to workpieces with non-parallel surfaces, the parts automatically adjust their relative positions to maintain proper alignment, preventing radial movement and tilting that would compromise machining accuracy
3Manufacturing precision
If a movable connection between clamping element parts is implemented, then alignment precision is improved, but device complexity increases
Solution Approach 1:
A spherical bearing is introduced as an intermediary element between the two clamping element parts. This bearing provides the necessary movable connection and alignment capability while keeping the mechanism simple and easy to implement, avoiding complex adjustment devices
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 design enables precise machining of workpieces with varying tolerances by compensating for non-parallel clamping surfaces, preventing radial movement and deformation, while maintaining accurate positioning and allowing for automatic or semi-automatic operation without loss of positioning accuracy.
Implementation Method 1
The first clamping element part and the second clamping element part are connected by means of a spherical bearing
Implementation Method 2
at least one fluid spring element which is disposed at least partially through the second clamping element part
Data Source
AI summary
A workpiece holder device for workpieces to be machined on multiple sides, wherein the workpiece can be held axially and radially relative to the first axis between a first workpiece holder, operatively connected to at least one support spindle of the workpiece holder device and rotatable about the first axis, and at least one second workpiece holder, operatively connected to at least one drive spindle of the workpiece holder device and rotatable about the first axis, by force locking by means of a clamping force which can be built up in the manner of a vice between the first workpiece holder and the second workpiece holder in the axial direction of the first axis and acting on the opposite sides of the workpiece.