Cam-Driven Clamping Mechanism for Drawing Machine
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Solution Overview
Problem
Conventional drawing machines are unreliable due to difficulties in maintaining consistent fluid pressure in pneumatic or hydraulic cylinders, fluid transmission drag, and vulnerability of related control circuits to malfunctioning.
Innovation Solution
A drawing machine design that eliminates hydraulic or pneumatic cylinders by using a cam with a groove and ridge portion to control a clamping device, allowing for reliable clamping and releasing of rods or pipes through a simple structure with fewer elements, including a first plate, clamping device, and driving device with a following roller and linkage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pneumatic or hydraulic cylinders are used to move the transmit element, then the clamping device can be actuated, but fluid pressure fluctuations and transmission drag occur leading to unreliable operation
Solution Approach 1:
The patent replaces the pneumatic or hydraulic cylinder with a cam mechanism. The cam converts rotational motion into linear reciprocating motion of the following roller, which directly moves the transmit element without requiring fluid transmission. This mechanical substitution eliminates fluid pressure fluctuations and transmission drag, thereby improving operational reliability and eliminating energy loss associated with fluid drag.
2Ease of operation
If pneumatic or hydraulic cylinders with control circuits are used, then the transmit element can be moved, but the control circuits are vulnerable to malfunctioning
Solution Approach 1:
The patent replaces the complex pneumatic or hydraulic control system with a simple cam mechanism. The cam's groove profile directly dictates the motion path of the following roller, eliminating the need for vulnerable control circuits. This mechanical approach maintains actuation capability while dramatically improving reliability by removing electronic or fluid control components that could malfunction.
3Reliability
If a cam mechanism with following roller is used to move the transmit element, then operational reliability is improved, but the structure becomes more complex
Solution Approach 1:
The patent integrates the cam mechanism directly into the existing plate structure. The cam is formed on the plate, and the following roller moves along the groove while being supported by the plate's geometry. This merging of the cam mechanism with the plate structure reduces overall device complexity while maintaining the reliability benefits of eliminating fluid cylinders.
4Force
If fluid cylinders are used to actuate the clamping device, then clamping force can be applied, but pressure maintenance is difficult
Solution Approach 1:
The patent replaces the fluid cylinder that applies clamping force with a cam mechanism. The cam's groove profile is designed to guide the following roller in a way that directly translates rotational motion into the linear motion needed to actuate the clamping device. This mechanical system provides consistent clamping force through precise geometric constraints rather than fluid pressure, eliminating pressure maintenance difficulties and improving force consistency.
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 provides reliable operation by eliminating fluid pressure fluctuations and transmission drag, resulting in a more reliable and simpler structure with reduced components, enhancing the drawing machine's performance and reliability.
Implementation Method 1
The cam includes a groove and a ridge portion. The following roller of the driving device is received in the groove and moves between the first and second positions so that the ridge portion drives the first plate to reciprocate horizontally
Implementation Method 2
a linkage for connecting the jaws to the following roller
Data Source
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AI summary
A drawing machine includes a plate (10), a clamping device (20), a driving device (30) and a cam (40) which has a groove (41) and a ridge portion (42). The clamping device includes two jaws movable on a first surface of the plate, a following roller (34) movable on a second surface of the plate and a linkage for connecting the jaws to the following roller. The driving device (30) includes a following roller (34) attached to the second surface of the plate. wherein the following roller (34) of the driving device (30) is received in the groove (41) of the cam and moves between the first and second positions so that the ridge portion (42) drives the plate (10) to reciprocate horizontally and control the clamping device (20) to switch between the clamping and releasing modes.