Portable Boring Machine Clamping Device Axial Nesting
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Solution Overview
Problem
Existing portable boring machines face issues with complex structures, poor operability, and difficulty in adjusting the position of the mandrel due to complicated cam and electric motor-driven clamping mechanisms, leading to clogging and inaccurate hole positioning.
Innovation Solution
A clamping device with a movable cylinder and fluid supply system that allows for axial movement, enabling the clamping unit to be positioned near the axis of the boring machine, simplifying the structure and improving operability by integrating the drive systems for stable clamping and drilling operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cam driven by a return spring and air cylinder is used to enlarge or reduce the head and collet in diameter, then the clamping function is achieved, but the structure around the front end becomes complicated and the boring machine is enlarged, worsening operability
Solution Approach 1:
The movable cylinder is disposed to cover the fixed piston, with the clamping unit nested within the connecting mechanism which is connected to the movable cylinder. This nested arrangement allows multiple functional components to occupy overlapping spatial volumes, reducing the overall envelope size and simplifying the front end structure while maintaining the clamping function.
Solution Approach 2:
The clamping unit is moved from a parallel arrangement with the nose piece to an axial arrangement along the spindle axis. The movable cylinder moves in the axial direction, and the connecting mechanism translates this axial motion to the clamping unit, repositioning it near the axis of the boring machine. This dimensional reorganization simplifies the front end structure and improves operability.
2Reliability
If an electric motor is disposed in parallel with a nose piece to drive the clamping mechanism, then the clamping function is achieved, but the structure around the front end becomes complicated and the boring machine is enlarged
Solution Approach 1:
The electric motor is replaced with a fluid-driven system consisting of a fixed piston and movable cylinder. Pressurized fluid is supplied to the first and second pressure chambers to move the movable cylinder axially, which then drives the clamping unit through the connecting mechanism. This substitution eliminates the need for an electric motor and associated dust-preventing processing, simplifying the front end structure.
Solution Approach 2:
A fluid supply device is used to supply pressurized fluid into the first pressure chamber and second pressure chamber formed in the movable cylinder. The pressure differential moves the movable cylinder in the axial direction, providing a compact and simple mechanical advantage system that replaces complex electrical motors while maintaining clamping functionality.
3Reliability
If the clamping unit is positioned away from the axis, then the clamping function is achieved, but the boring machine structure becomes complex and operability deteriorates
Solution Approach 1:
The clamping unit is repositioned from a lateral arrangement to an axial arrangement along the spindle axis. The movable cylinder moves in the axial direction, and the connecting mechanism translates this motion to position the clamping unit near the axis. This axial positioning simplifies the overall structure and significantly improves operability by reducing the machine's envelope and improving balance.
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 enhances the operability and workability of portable boring machines by simplifying the structure, allowing for stable clamping and precise hole positioning, and integrating the drive systems for improved control and efficiency.
Implementation Method 1
a fluid supply device capable of supplying pressurized fluid into each of the first pressure chamber and the second pressure chamber to move the movable cylinder in the axial direction
Data Source
AI summary
A clamping device is attached to a front part of a body of a boring machine for clamping the boring machine and a workpiece together. The clamping device comprises a fixed piston fixed on the front part of the body, a movable piston equipped over the front part of the body movably in the axial direction of a spindle of the boring machine, a first pressure chamber, a second pressure chamber, a pressurized fluid-supply device to supply pressurized air to the first pressure chamber and the second pressure chamber so that the movable cylinder is moved in the axial direction, a connecting mechanism an end portion of which is connected to the movable cylinder, and a clamping unit which is connected to the other end portion of the connecting mechanism, and is fixed to a certain position of the workpiece.