Stamped Metal Thread Forming With Synchronous Radial Slides
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Solution Overview
Problem
Existing rolling processes for producing threads, particularly from metal, require the component and/or tool to be rotated during machining, which can be cumbersome and inefficient.
Innovation Solution
A method and device for producing a thread in a stamping process by axially inserting a thread core into a cylindrical blank, using a plurality of slides that are synchronously displaced radially inward, with drive wedges guiding this movement to form a threaded region, allowing for individual control and adjustment of each slide for optimal machining conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a rolling process is used to produce a thread from metal, then the thread can be formed effectively, but the component and/or tool must be rotated during machining which increases device complexity
Solution Approach 1:
Instead of rotating the component or tool during thread formation (conventional rolling process), the invention inverts the approach by using axially moving slides that displace radially inward to form the thread. The thread core remains stationary while the slides move linearly, eliminating the need for rotation and simplifying the device structure.
Solution Approach 2:
The invention replaces the rotational mechanical system with a linear axial movement system. The drive wedges convert axial movement into radial displacement of the slides, substituting the complex rotational mechanism with a simpler linear actuation system that achieves the same thread formation function.
2Manufacturing precision
If multiple slides are used to form the thread circumferentially, then the thread can be formed with precision, but the number of moving parts increases
Solution Approach 1:
The thread formation process is segmented into multiple discrete slides distributed circumferentially around the blank. Each slide independently forms a portion of the thread, allowing precise control over the threading process while maintaining manageable device complexity through modular segmentation.
Solution Approach 2:
The invention merges the functions of multiple slides with a single drive wedge system. The drive wedges are positioned to simultaneously actuate multiple slides in a coordinated manner, combining the control function into fewer elements and reducing the overall number of moving parts while maintaining precise thread formation.
3Ease of operation
If drive wedges with radially inner guide surfaces are used to move slides synchronously, then the slides can be controlled precisely, but the guide surfaces must be precisely manufactured
Solution Approach 1:
The drive wedges act as intermediary elements between the actuation system and the slides. The radially inner guide surfaces of the drive wedges interface with the radially outer guide surfaces of the slides, mediating the force transmission and enabling synchronous control. This intermediary mechanism allows for tolerance compensation and reduces the precision requirements compared to direct coupling.
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 approach reduces the number of required slides and moving parts, enhances precision and adjustability, and enables efficient thread formation with minimal tool complexity, while allowing for flexible speed regulation during different machining phases.
Implementation Method 1
a number of essentially axially arranged drive wedges with a radially inner guide surface which each widens in the closing direction of the tool is provided, at least corresponding to the number of slides, and these drive wedges are moved (synchronously) in the closing direction to close the slides
Implementation Method 2
the radially inner guide surfaces of the drive wedges slide on radially outer slide guide surfaces which widen correspondingly in the closing direction and displace the slides synchronously radially inwards
Implementation Method 3
the material of the substantially cylindrical section is formed or embossed to form the threaded section substantially circumferentially between the core contour region of the thread core and slider contour regions provided radially on the inside of the slides
Data Source
Figure 1a~2
Figure 3a
Figure 3b~3c
AI summary
Method and device for producing a component (1) with a threaded region (2) in a stamping process from a blank (12) with a substantially cylindrical section (16), characterized in that the threaded region (2) is formed in the form of at least one at least partially circumferential recess (3) with a thread pitch (g) by axially inserting a thread core (46) with a partially or completely circumferential core contour region (49) into an interior space (13) of the substantially cylindrical section (16) of the blank (12), and the at least one at least partially circumferential recess (3) with a thread pitch (g) is stamped by a plurality of sliders (40) arranged circumferentially around the substantially cylindrical section (16) of the blank (12) by synchronously displacing the plurality of sliders (40) radially inward.such that the material of the essentially cylindrical section (16) is formed into the threaded section (2) essentially circumferentially between the core contour region (49) of the thread core (46) and slide contour regions (44) provided radially on the inside of the slides (40), wherein for the synchronous movement of the slides (40) radially inward, a number of essentially axially arranged drive wedges (27) is provided, each with a radially inner guide surface (31) widening in the closing direction (63) of the tool, which corresponds at least to the number of slides (40), and the drive wedges (27) are displaced in the closing direction (63) to close the slides (40), wherein the radially inner guide surfaces (31) of the drive wedges (27) slide on radially outer slide guide surfaces (41) widening correspondingly in the closing direction (63), and the slides (40) synchronously shift radially inwards.,