Automatic Sawing Machine Positioning Device for Stone Blocks
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Solution Overview
Problem
Existing automatic sawing machines for cutting stone and concrete blocks have limited thickness compensation capabilities, typically handling variations within 30-50 mm, requiring manual block selection and resulting in high production costs for surface coating elements.
Innovation Solution
An automatic sawing machine with a positioning device featuring a bar with rotatably mounted arms and movable conveyor belts, allowing for thickness compensation up to 150-200 mm, ensuring straight cuts and eliminating the need for manual selection, by using arms that pivot towards a bar and are urged by tensioning devices, and incorporating rollers to reduce friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional positioning devices with fixed conveyor belts are used, then the structure is simple, but the thickness compensation capability is limited to 30-50 mm requiring manual block selection
Solution Approach 1:
The patent applies dynamics by making the conveyor belts movable relative to the frame and the bar movable perpendicular to the cutting path. This dynamic configuration allows the positioning device to adapt to blocks with thickness variations of 150-200 mm, eliminating the need for manual block selection while maintaining automated processing.
Solution Approach 2:
The positioning device is segmented into multiple independent components: a bar with multiple rotatably mounted arms, each arm having rollers that can independently contact blocks of different thicknesses. This segmentation allows each arm to independently compensate for thickness variations, achieving high adaptability without requiring an overly complex monolithic structure.
2Manufacturing precision
If manual block selection is performed to ensure homogeneous thickness, then cutting precision is improved, but productivity decreases and production costs increase
Solution Approach 1:
The positioning device performs self-service by automatically compensating for thickness variations through its movable bar and rotatably mounted arms with rollers. The system self-adjusts to maintain proper block positioning and cutting straightness without requiring manual intervention for block selection, thereby maintaining high productivity and automated processing.
3Manufacturing precision
If the conveyor belts are made rigid to maintain positioning stability, then cutting precision is improved, but the ability to compensate for thickness variations is reduced
Solution Approach 1:
The patent resolves this contradiction by making the conveyor belts movable relative to the frame while maintaining stability during operation. The movability allows the belts to adapt to different block thicknesses (150-200 mm range), while the tensioning devices and guide mechanisms ensure stable positioning accuracy during the cutting process.
Solution Approach 2:
The system changes the parameter of conveyor belt position relative to the frame, allowing dynamic adjustment to accommodate thickness variations. The movable bar perpendicular to the cutting path further enables parameter changes in the positioning mechanism to maintain both adaptability and precision.
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
Enables higher hourly throughput and significantly lower manufacturing costs by accommodating blocks of varying sizes, allowing for automated processing without manual operations and producing calibrated pieces according to industry needs.
Implementation Method 1
a plurality of arms that are consecutively mounted on the bar and are rotatably restrained to the bar and are urged away from it by tensioning devices
Implementation Method 2
two conveyor belts that are disposed at right angles to each other and are mounted on a frame or base. The conveyor belts define a channel suitable to receive blocks to be cut
Data Source
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AI summary
The invention relates to an automatic sawing machine (100) for sawing natural stones pieces and concrete blocks. The sawing machine comprises: i) a frame (110); ii) a first motorized conveyor belt (120) and a second motorized conveyor belt (130) mutually arranged at right angles, the first conveyor belt (120) and the second conveyor belt (130) being inclined relative to an horizontal plane so as to define a channel -like cutting path; iii) a plurality of cutting devices (140), each cutting device comprising a motor (141) on whose shaft a circular blade (142) is keyed, said cutting devices (140) being restrained to said frame (110) and being arranged above the channel-like cutting path defined by the conveyor belts (120, 130) with respect to a vertical direction (Z) so that the respective circular blades (142) are located within the channel-like cutting the path; iv) a positioning device (150) configured to maintain said blocks (B) in contact with the conveyor belts (120, 130) during their processing. The positioning device (150) comprises a bar (151) restrained to the frame (110) in a longitudinal direction (X) of the automatic sawing machine (100) parallel to the cutting path defined by the conveyor belts (120, 130), said bar (151) comprising a plurality of arms (152) pivotally restrained thereto and urged away therefrom by way of respective tensioning devices.