CNC Spindle Marking Device Using Rotational Impact
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Solution Overview
Problem
Existing marking devices for rotating machines require additional equipment and steps for machining and marking, increasing manufacturing costs and complexity, and existing solutions do not provide reliable, long-lasting, coaxial stylus mechanisms for efficient axial impact marking.
Innovation Solution
A marking device that utilizes the rotation of a CNC machine to convert into axial impact force through impact balls and hammer pins, positioning the stylus co-axial with the machine spindle for efficient and wear-reduced marking, allowing for reliable and precise indentation on workpieces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate stand alone marking device is used after machining, then marking capability is provided, but manufacturing cost and process complexity increase
Solution Approach 1:
The marking device is integrated into the CNC machine tool, combining the marking function with the existing machining operation. The marking stylus is mounted on the CNC spindle, allowing marking to be performed during the same machining process, thereby eliminating the need for a separate marking device and reducing overall process complexity
Solution Approach 2:
The CNC machine tool is designed to perform both machining and marking operations using the same spindle and control system. The marking stylus can be installed on the existing spindle, enabling the machine to serve multiple functions (machining and marking) without requiring additional dedicated equipment
2Ease of operation
If an off-set marking stylus is used from the axis of rotation, then marking is possible, but programming and process control become more complex
Solution Approach 1:
The marking stylus is positioned co-axially with the spindle axis of rotation, creating a symmetric arrangement where the stylus rotates in perfect alignment with the spindle. This symmetric configuration simplifies the programming and control requirements compared to off-set positioning, as the marking motion naturally follows the rotational path without requiring complex offset calculations
3Productivity
If conventional marking mechanisms are used, then marking can be performed, but reliability and wear resistance are insufficient
Solution Approach 1:
The marking stylus is actuated through periodic impact forces generated by falling weights or springs that strike the stylus at regular intervals during spindle rotation. This periodic impact mechanism provides reliable and consistent marking action, improving both the reliability and wear resistance of the system compared to continuous contact methods
Solution Approach 2:
The conventional continuous contact mechanical marking system is replaced with an impact-based mechanism where weights or springs deliver periodic striking forces to the stylus. This substitution improves reliability and reduces wear by eliminating continuous friction and contact between the stylus and workpiece
4Speed
If high RPM rotation is used for marking, then marking speed increases, but impact force and marking precision decrease
Solution Approach 1:
The marking mechanism uses periodic impact forces from falling weights or springs that strike the stylus at specific moments during rotation. This allows the system to operate at high RPM for speed while the impact forces provide the necessary axial force for precise marking, as the impact occurs in discrete bursts rather than continuously
Solution Approach 2:
The marking stylus remains in continuous contact with the workpiece surface throughout the rotation cycle, ensuring continuous marking action. The periodic impact mechanism ensures that the stylus receives continuous axial force delivery while maintaining high rotational speed, thereby achieving both speed and precision simultaneously
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 efficient, reliable, and cost-effective marking by eliminating the need for separate marking devices, reducing wear, and providing precise axial impact for consistent markings, while integrating with CNC machine programming for enhanced control.
Implementation Method 1
impact balls (preferably impact ball) technology to transform the rotation force provided by the CNC machine (or other machine tool) to axial impact force on a stylus
Data Source
AI summary
This invention discloses a component marking device to allow components to be marked by using the rotation provided by a CNC type of machine or other machine tool, and which utilizes a stylus which shares the same approximate axis of rotation as the CNC machine and which utilizes rotating impact balls to impart a strong throwing force on hammer pins and a hammer to cause the sudden downward movement of the stylus as desired.