Cutting Tool Safety Retraction With Fixed-Cylinder Blade Lowering
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Solution Overview
Problem
Existing cutting machine tools face challenges in ensuring operator safety due to the high energy requirements and stress on internal components during the retraction of rotating blades, which can lead to reduced longevity and functionality.
Innovation Solution
A safety apparatus for cutting machine tools that uses a dual-chamber actuator with a low-pressure and high-pressure chamber, coupled with a kinematic mechanism and decelerating means, allowing the blade to retract without rotating the cylinder, thereby reducing energy consumption and stress on components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a tilting cylinder is used to allow rotation during blade retraction, then the blade can be lowered and lifted, but greater pressure energy buildup is required and higher pressure inside the accumulation chamber is needed
Solution Approach 1:
The patent extracts the rotation function from the cylinder itself, allowing the cylinder to remain fixed while only the stem rotates. This separation eliminates the need for the entire cylinder to tilt and rotate, thereby reducing the pressure energy required for operation.
Solution Approach 2:
Instead of making the cylinder rotate to achieve blade retraction, the patent inverts the approach by making the stem rotate within a fixed cylinder. This reversal of the rotation element significantly reduces the energy and pressure requirements.
2Ease of operation
If a tilting cylinder is used to allow rotation during blade retraction, then the blade can be lowered and lifted, but greater stress on the internal members of the cylinder occurs
Solution Approach 1:
The patent extracts the rotation function from the cylinder body, confining it to the stem only. This separation protects the cylinder's internal members from the damaging stresses of rotation, thereby preserving structural strength and reducing wear.
Solution Approach 2:
By inverting which component rotates (stem instead of cylinder), the patent eliminates the harmful rotational stresses on the cylinder's internal members, significantly improving durability and reducing maintenance requirements.
3Ease of operation
If the cylinder rotates during blade retraction, then the blade can be moved, but the stem is subjected to damaging stresses as it follows the rotation
Solution Approach 1:
The patent extracts the rotation function from the stem-cylinder combination, allowing only the stem to rotate independently. This controlled rotation within a fixed cylinder dramatically reduces the stresses on the stem, extending its service life.
Solution Approach 2:
By inverting the rotation arrangement so that the stem rotates within a fixed cylinder rather than the entire cylinder rotating, the patent eliminates the compound stresses that would damage the stem, thereby significantly extending its operational lifespan.
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 effectively lowers the rotating blade in case of contact, ensuring operator safety while minimizing energy usage and reducing stress on the machine's components, leading to increased longevity and efficient operation.
Implementation Method 1
an actuator (15) of the hydraulic type, comprised by a cylinder (18) and a piston (19), with a stem (20)
Implementation Method 2
a spring-loaded device (30, 34) for maintaining the cutting tool in the operating configuration
Data Source
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AI summary
A safety apparatus (10) for a cutting machine tool, of the type comprising a frame (11) that supports a worktable (12) on which the pieces being machined are cut and a cutting tool (13) with its own supporting structure (14) coupled to the frame (11). The apparatus (10) comprises an actuator (15) controlled by control means for moving the supporting structure (14), which is adapted to guide the cutting tool (13) from an operating configuration, for which it protrudes from the worktable (12), to a safe configuration by retracting it with respect to the worktable (12), and vice versa; the supporting structure (14) comprises a kinematic mechanism for moving the cutting tool (13), with at least one linkage (16) for the connection of a supporting arm (17) of the cutting tool (13) with the actuator (15), the latter being integral with the frame (11) of the machine.