Cam Gear Drive for Sheet Processing Tool Synchronization
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Solution Overview
Problem
Sheet processing machines face challenges in efficiently processing and aligning sheets due to limitations in drive systems that affect processing speed, accuracy, and synchronization of tools, leading to inefficiencies and increased wear.
Innovation Solution
The implementation of a cam gear system that converts rotary movement into reciprocal movement, enabling high-speed processing of sheets while minimizing wear and ensuring precise alignment and synchronization of stripping and blanking tools, along with a central lubrication system for reduced maintenance and improved accessibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional drive system is used, then the machine structure is simpler, but the processing speed is limited and tool synchronization is imprecise
Solution Approach 1:
The patent replaces conventional mechanical drive systems with a cam gear mechanism that converts rotary movement into reciprocal movement. This substitution enables high-speed processing (up to 8000 sheets per hour) while maintaining precise synchronization of stripping and blanking tools through the geometric precision of cam profiles, rather than relying on complex mechanical linkages.
Solution Approach 2:
The invention changes the motion parameter from continuous rotary movement to controlled reciprocal movement through cam gears. This parameter transformation allows the tools to achieve precise positioning and synchronization at high speeds, resolving the contradiction between processing speed and synchronization accuracy by fundamentally altering how motion is transmitted.
2Productivity
If high-speed processing is implemented, then productivity increases, but wear on tools and drive components increases
Solution Approach 1:
The patent converts the potentially harmful effect of high-speed operation into beneficial controlled reciprocal movement through cam gears. The cam profile geometry ensures that even at 8000 sheets per hour, the tools follow precise motion paths with controlled acceleration and deceleration, transforming what would be destructive high-speed impact into smooth, controlled motion that reduces wear while maintaining high productivity.
Solution Approach 2:
The cam gear system implements periodic reciprocal movement for the stripping and blanking tools, allowing them to engage and disengage in a controlled cyclic manner. This periodic action at high speed reduces continuous friction and impact wear, as tools are only in contact with sheets during the necessary processing portion of each cycle, thereby increasing reliability while maintaining high throughput.
3Manufacturing precision
If tools are precisely synchronized, then processing accuracy improves, but the drive system becomes more complex
Solution Approach 1:
The patent merges the drive mechanisms for multiple tools (stripping and blanking tools) into a single integrated cam gear system. All tools are synchronized through their connection to the same cam gear mechanism, which converts one rotary input into coordinated reciprocal movements of multiple tools. This merging approach achieves precise synchronization without requiring separate complex control systems for each tool.
Solution Approach 2:
The cam gear acts as an intermediary mechanism between the rotary drive and the multiple tools requiring synchronization. It mediates the motion transmission by converting rotary movement into precisely controlled reciprocal movement for each tool based on its specific cam profile, achieving accurate tool alignment and synchronization while simplifying the overall drive system architecture.
4Ease of manufacture
If a central lubrication system is implemented, then maintenance cost decreases, but the system requires additional infrastructure
Solution Approach 1:
The patent implements a central lubrication system that serves multiple drive components and tool mechanisms simultaneously. This multi-functional lubrication infrastructure provides lubrication to cam gears, tool contacts, and other moving parts through a single centralized source, reducing the need for multiple separate lubrication systems and lowering overall maintenance costs despite the added infrastructure.
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
This solution allows for high-speed processing of up to 8000 sheets per hour with increased accuracy and reduced wear, while the central lubrication system enhances cost-effectiveness and accessibility for maintenance, ensuring smooth and register-accurate processing.
Implementation Method 1
at least one downstream gear is arranged downstream of the at least one gear. The at least one downstream gear is in contact with the at least one stripping drive shaft. The at least one downstream gear is designed to convert at least one rotary movement into at least one reciprocal movement.
Data Source
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AI summary
The invention relates to a sheet processing machine (01) comprising at least one contact unit (200) and at least one shaping unit (300) and at least one stripping unit (400) and at least one blanking unit (500), the sheet processing machine (01) having at least one drive (1001), the at least one drive (1001) being designed to drive at least one stripping tool (402; 403) of at least one stripping means (401) of the at least one stripping unit (400) and/or at least one blanking tool (502) of at least one blanking means (501) of the at least one blanking unit (500) by means of at least one transmission (1007), at least one downstream transmission (1019) being arranged after the at least one transmission (1007), the at least one downstream transmission (1019) being coupled to the at least one stripping tool (402; 403) of the at least one stripping unit (400) and/or to the at least one stripping tool (502) of the at least one stripping unit (500), the at least one downstream transmission (1019) being designed to convert at least one rotary movement into at least one reciprocal movement, the at least one downstream transmission (1019) being designed as a disc cam gear (1019). The invention also relates to a further sheet processing machine (01) and to a method for driving at least one tool (402; 403; 502) of a sheet processing machine (01).