Mitre Sawing Machine with Movable Vice for Precise Angle Cuts
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Solution Overview
Problem
Existing sawmills for miter cuts in metallic workpieces face challenges in achieving precise cuts with straight sections, as they often result in long residue pieces due to asymmetrical clamping and geometric limitations, especially when sawing at flat miter angles.
Innovation Solution
The sawing machine incorporates a movable tensioning stick that integrates a saw table, allowing for symmetrical clamping of the workpiece based on the set miter angle. This design enables the saw band to operate without interference from the clamping cheeks, ensuring precise cuts with minimal residue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the vice is positioned close to the cutting plane to enable precise clamping, then cutting precision is improved, but the movable clamping jaw interferes with the saw blade during negative miter angle cuts
Solution Approach 1:
The vice is made movable along the feed direction instead of being fixed, allowing its position to be dynamically adjusted based on the miter angle. For negative miter angles, the vice moves to a first position where the clamping jaw does not interfere with the saw blade path, while for positive miter angles it moves to a second position for optimal clamping
Solution Approach 2:
The clamping function is separated from the vice by introducing an independent clamping device that can operate separately. This allows the vice to be positioned optimally for each miter angle without being constrained by the need to maintain clamping pressure through a fixed position
2Stability of the object's composition
If the stationary clamping jaw is widened to ensure symmetrical clamping, then clamping symmetry is improved, but leftover pieces longer than the jaw width cannot be sawn with automatic feeding
Solution Approach 1:
The stationary clamping jaw is made movable along the feed direction, allowing it to be dynamically repositioned. For automatic feeding operations, it moves to a first position that accommodates longer leftover pieces, while for precision clamping it moves to a second position that ensures symmetrical clamping
Solution Approach 2:
The stationary clamping jaw serves multiple functions by being movable: it acts as a long support for automatic feeding operations and as a precise clamping surface for manual operations, eliminating the need for different jaw widths for different operations
3Adaptability or versatility
If the vice is positioned further away from the sawing plane to free up pivoting range, then negative miter angle capability is improved, but cutting precision deteriorates due to elastic mobility of workpieces
Solution Approach 1:
The vice transitions from a fixed position to a dynamic positionable system. It can be moved closer to the cutting plane when high precision is needed and moved further away when maximum miter angle range is required, allowing optimal positioning for each specific operation
Data Source
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AI summary
The invention relates to a sawing machine for miter cuts in metallic workpieces. The sawing machine comprises a saw upper part 11 with at least two running wheels 12, at least one of which is driven by a motor, and with a saw band 13 that runs around the running wheels 12, further comprising a lifting and lowering device 15 for moving the saw upper part 11 up and down in order to move the saw band 13 in a sawing feed motion in a sawing area 17, a transport section 5 for feeding a workpiece to be sawn in a feed direction 25 to the sawing area 17, a frame 7 on which the saw upper part 11 is held and which is pivotable about a vertical axis 10 in order to set a miter angle between the saw band 13 and the feed direction 25, a movable saw table 3 arranged in the sawing area 17 for placing the workpiece to be sawn on it, and a clamping stock 27, 28 for clamping the workpiece to be sawn during the sawing process.The saw table 3 and the clamping vise 27, 28 are designed so that they can be moved in and against the feed direction 25.