Clamp Device Cam Mechanism for Cutting Insert
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing clamping devices for cutting inserts face challenges in achieving high operability and clamping force, making it difficult to efficiently attach and detach the cutting insert and ensuring firm clamping during cutting operations.
Innovation Solution
A clamping device with a clamp member and screw member design that includes inclined sliding surfaces and engagement surfaces, allowing for precise movement and firm contact with the cutting insert, enhancing clamping force and operability by using a guide hole with specific inclination angles and a diameter-enlarged portion for the screw member to facilitate easy attachment and detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional clamp pin and lock screw design is used, then the structure is simple, but the clamping force is insufficient and operability is poor
Solution Approach 1:
The clamp pin is segmented into multiple functional zones: a clamp portion with clamp surfaces for contacting the cutting insert, first and second cam surfaces for engagement with the lock screw, and positioning features. This segmentation allows each zone to perform its specific function optimally, achieving high clamping force through distributed contact surfaces while maintaining reasonable structural complexity
Solution Approach 2:
The lock screw acts as an intermediary mechanism that translates rotational motion into linear motion to actuate the clamp pin. The cam surfaces on both the lock screw and clamp pin serve as intermediary elements that provide mechanical advantage and controlled movement, enabling precise clamping action with enhanced force multiplication
2Ease of operation
If the clamp pin is moved directly without cam surfaces, then the structure is simpler, but the operability for attaching/detaching the cutting insert deteriorates
Solution Approach 1:
The cam surfaces create a dynamic engagement mechanism where the lock screw's rotation dynamically controls the clamp pin's position. The cam profiles are designed to provide smooth transition between clamped and unclamped states, enabling easy operation for attaching and detaching cutting inserts while maintaining controlled mechanical movement
Solution Approach 2:
The cam surfaces on both the lock screw and clamp pin feature curved geometries that facilitate smooth rotational-to-linear motion conversion. These curved surfaces enable gradual engagement and disengagement of the clamp pin, improving operability by allowing controlled movement during the attaching and detaching operations
3Strength
If the clamp portion does not have specific clamp surfaces, then manufacturing is easier, but the clamping force and contact with the cutting insert are insufficient
Solution Approach 1:
The clamp portion features localized clamp surfaces with specific geometric characteristics designed for optimal contact with the cutting insert. These locally optimized surfaces concentrate clamping force at critical contact points while the rest of the clamp pin maintains simpler geometry for ease of manufacture. The clamp surfaces are positioned to engage specific features on the cutting insert for secure holding
Data Source
AI summary
A clamping device having a high clamping force and operability when a cutting insert is attached/detached is provided. The clamping device has a guide hole (22), a screw hole (21), a clamp member (1) having a clamp portion (2), and a screw member (10) screwed with the screw hole (21). The screw member (10) can be engaged with the clamp member (1) in movement both in the first and second directions and the guide hole (22) has a first cam surface (22a) converting a force in the first direction received from the screw member (10) into a force for moving the clamp member (1) in a direction toward the cutting insert (30) and a second cam surface (22b) converting a force in the second direction into a force for moving the clamp portion (2) in a direction away from the cutting insert (30).