CNC Toolholder Fixture with Ball Lock Collar
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Solution Overview
Problem
Current holding fixtures for V-Flange toolholders in CNC machinery lack ease of use, safety, and flexibility, particularly in protecting precision taper shanks and securely fastening the toolholder without requiring additional tools or posing safety hazards during assembly.
Innovation Solution
A fixture with a ball lock collar and taper guide sleeve that securely holds and orients the V-Flange toolholder, allowing for easy insertion and locking without additional tools, protecting the taper shank and enabling safe handling, with features for left or right-handed use and 45-degree radial orientation for tool accessibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional holding fixtures are used for V-Flange toolholders, then the toolholder can be held during assembly, but the precision taper shank is not protected from damage and deformation
Solution Approach 1:
A soft protective sleeve is introduced as an intermediary component between the fixture's gripping mechanism and the toolholder's precision taper shank. The sleeve contacts the shank during clamping operations, preventing direct metal-to-metal contact that could cause damage or deformation to the precision surfaces, while still allowing effective gripping and positioning.
Solution Approach 2:
The fixture is divided into separate functional components: a protective sleeve that interfaces with the toolholder, a clamping mechanism that applies force, and a positioning system that orients the toolholder. This segmentation allows the protective function to be isolated and optimized without compromising the clamping effectiveness or ease of operation.
2Ease of operation
If the V-Flange toolholder is securely fastened to a fixture surface, then the operator can safely assemble cutting tools with both hands, but the assembly process becomes more complex and time-consuming
Solution Approach 1:
The fixture pre-positions the V-Flange toolholder in the correct orientation and secures it to the fixture surface before the cutting tool assembly begins. This preliminary securing action eliminates the need for the operator to manually hold or stabilize the toolholder during assembly, enabling immediate two-handed operation on the cutting tool while maintaining safety.
Solution Approach 2:
The fixture design includes self-aligning features and automatic positioning mechanisms that orient the toolholder correctly without requiring precise manual placement by the operator. The toolholder self-positions into the fixture's locating features, reducing the time and skill required for secure mounting while ensuring safety.
3Reliability
If a retention stud assembly is required for the V-Flange toolholder, then the toolholder can be retained in the machine spindle, but the assembly becomes difficult without immobilizing the toolholder using a fixture
Solution Approach 1:
The assembly process is segmented into distinct phases: first, the toolholder is mounted and secured to the fixture using simple clamping action; second, the retention stud is assembled to the immobilized toolholder while it remains fixed in the fixture; third, the completed assembly is released from the fixture. This segmentation allows the complex retention stud assembly to be performed on a stationary, supported toolholder rather than a free-floating one.
Solution Approach 2:
The fixture serves as an intermediary support system during the retention stud assembly operation. It provides a stable reference frame and immobilization mechanism that enables precise alignment and secure fastening of the retention stud to the toolholder, which would be difficult to achieve without external support.
4Ease of operation
If current holding fixtures are used, then the V-Flange toolholder can be held, but they lack the ability to securely fasten and protect the toolholder with ease and safety
Solution Approach 1:
The fixture is designed with multiple integrated functions: positioning the toolholder in correct orientation, securing it to the fixture surface, protecting the precision taper shank, and maintaining immobilization during retention stud assembly. By combining these functions into a single universal fixture system, ease of operation is improved without sacrificing adaptability, as the fixture handles all these tasks through coordinated mechanisms.
Solution Approach 2:
Previously separate functions (holding, protecting, positioning, and securing mechanisms) are merged into an integrated fixture system where components work together synergistically. The protective sleeve, clamping mechanism, and positioning features are combined in a unified design that provides comprehensive toolholder support while maintaining operational simplicity and safety.
Data Source
AI summary
A toolholder tightening fixture for selectively engaging a V-flange toolholder is provided. The fixture comprises a ball lock collar movably coupled relative to a housing and includes an inner surface having a recess formed therein. A lock housing is fixedly coupled with the fixture and is positioned within the ball lock collar. The lock housing includes at least one radial bore and is configured for receiving the toolholder. A lock ball is positioned within the radial bore of the lock housing. The ball lock collar is moved to an unlocked position when the lock ball is positioned in the recess in the ball lock collar to allow the toolholder to be inserted and removed from the lock housing. The ball lock collar is moved to a locked position when the lock ball is removed from the recess and placed in engagement with the toolholder.