Zero Point Clamping Device Arc-Shaped Contact Area
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Solution Overview
Problem
Existing zero-point clamping devices face challenges in precisely positioning and guiding components due to the risk of jamming when inserting draw-in bolts into receiving openings, which requires precise manufacturing and coordination, and conical clamping surfaces can lead to axial position changes with force application.
Innovation Solution
A zero-point clamping device design featuring a receiving opening with an insertion area larger than the pull-in bolt and a radially offset arc-shaped contact area allows easy insertion and precise positioning, using a lateral displacement mechanism with an adjustable slide and wedge surface for clamping, ensuring precise positioning in X, Y, and Z axes without complex deformations or vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If draw-in bolts are inserted into receiving openings with precise manufacturing, then positioning precision is improved, but the risk of jamming during insertion increases
Solution Approach 1:
The receiving opening is divided into two functional areas: an insertion area with larger dimensions for easy bolt insertion, and a contact area with precise arc-shaped surfaces for accurate positioning. This segmentation allows the bolt to be inserted easily through the larger opening while achieving precise positioning when it contacts the arc-shaped surfaces.
Solution Approach 2:
Different regions of the receiving opening have different dimensional characteristics. The insertion area has larger dimensions to facilitate easy insertion, while the contact area has precisely defined arc-shaped surfaces for accurate positioning. This local differentiation resolves the contradiction between easy insertion and precise positioning.
2Ease of operation
If conical clamping surfaces are used, then insertion ease is improved, but axial position stability deteriorates due to position changes with pull-in force
Solution Approach 1:
The contact surfaces are designed as arc-shaped surfaces rather than conical surfaces. The arc-shaped geometry provides a stable positioning reference that does not change its positioning characteristics with applied force, unlike conical surfaces which can cause axial position changes. The arc shape ensures consistent positioning in the radial direction while maintaining axial stability.
3Measurement precision
If precise positioning is achieved through precise manufacturing of bolts and openings, then positioning accuracy is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The receiving opening is segmented into an insertion area and a contact area, allowing different manufacturing approaches for each region. The insertion area can be manufactured with standard tolerances, while the contact area uses arc-shaped surfaces that provide precise positioning with simpler geometry than fully precision-machined interfaces.
Solution Approach 2:
The design changes the geometric parameters of the receiving opening by incorporating arc-shaped contact surfaces with specific radii. This parameter change allows precise positioning to be achieved through geometric constraints rather than requiring extremely tight manufacturing tolerances throughout the entire interface.
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 enables easy insertion and removal of the pull-in bolt, achieves high holding forces without vibrations, and provides precise positioning and accessibility, enhancing the usability and accuracy of the clamping system.
Implementation Method 1
a contact area that is radially offset from the insertion area and has at least one contact surface that is arc-shaped when viewed from above
Implementation Method 2
The clamping mechanism preferably has a slide that can be adjusted transversely to the receiving opening and has a wedge surface for engagement with an inclined clamping surface of a wedge groove of the draw-in bolt
Implementation Method 3
As a result, high holding forces can be achieved without vibrations in the clamping
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to a zero point clamping device for clamping a first component (1) to a second component (2) at a precise position, wherein the first component (1) comprises at least one draw-in bolt (3) and the second component (2) comprises a receiving opening (4) for the draw-in bolt (3) and a clamping mechanism (5) for drawing in the draw-in bolt (3) into the receiving opening (4). According to the invention, the receiving opening (4) comprises an insertion area (12) having larger outer dimensions than the draw-in bolt (3) and a contact area (13) radially offset relative to the insertion area (12) and having at least one contact surface (14) having a circular shape in top view.