Parallel-Link Transfer Arm for Rigid Press Workpiece Handling
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Solution Overview
Problem
In press devices, the small separation distance between the die and punch makes it difficult to place and hold workpieces effectively, leading to reduced rigidity, transfer speed, and increased power requirements due to the need for elongated mechanisms and servomotors to recline the main arm.
Innovation Solution
A transfer device with a pivoting arm and main arm that uses a parallel link mechanism for inclination adjustment, eliminating the need for elongated horizontal mechanisms and servomotors by sliding the connection part along the main arm, allowing for horizontal posture without joints or additional motors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a joint is provided in the intermediate portion of the main arm to bend the main arm, then the main arm can be reclined to a posture close to horizontal to access the workpiece, but the rigidity of the main arm is reduced
Solution Approach 1:
The transfer device is divided into functionally independent parts: the main arm maintains its structural integrity while the inclination adjustment mechanism operates separately through parallel linkages. This segmentation allows the main arm to remain rigid without requiring intermediate joints, thus resolving the contradiction between accessibility and rigidity.
Solution Approach 2:
Instead of bending the main arm in the horizontal plane (which would compromise rigidity), the invention adjusts the inclination of the main arm in a different dimensional approach using parallel link mechanisms. This allows the distal end to reach the workpiece position without compromising the main arm's structural strength.
2Ease of operation
If a joint is provided in the intermediate portion of the main arm to bend the main arm, then the main arm can be reclined to a posture close to horizontal, but the transfer speed and stability of the object decrease
Solution Approach 1:
By separating the inclination adjustment function from the main arm structure itself, the main arm can maintain its full rigidity and structural integrity. This segmentation enables faster and more stable transfer operations while still achieving the necessary inclination for workpiece accessibility through the parallel link mechanism.
Solution Approach 2:
The parallel link mechanism provides dynamic inclination adjustment capability, allowing the main arm to achieve the required posture for workpiece access without permanently compromising its structural properties. This dynamic adjustment maintains transfer speed and stability while enabling operational flexibility.
3Ease of operation
If a servomotor is provided for bending the main arm, then the main arm can be reclined to horizontal posture, but more power is required to drive the main arm
Solution Approach 1:
The inclination adjustment function is separated from the main arm's primary drive system. Instead of using a servomotor to bend the entire main arm (which would require significant power), the parallel link mechanism provides mechanical advantage with minimal power input, reducing the power requirement while achieving the same operational effect.
Solution Approach 2:
Rather than powering the entire main arm structure to achieve inclination, the invention applies power only to the inclination adjustment mechanism through parallel links. This partial action approach significantly reduces the power requirement while still achieving the necessary distal end position for workpiece access.
Data Source
AI summary
This transfer device is a transfer device which transfers an object to be transferred and includes a pivoting arm supported by a frame and configured to be rotatably driven around a pivot axis, a main arm which is rotatably connected to the pivoting arm and to which a support part which supports the object to be transferred is connected at a distal end portion, and an inclination adjustment part which is slidably connected to the main arm in a longitudinal direction of the main arm and has a parallel link mechanism to adjust an inclination of the main arm.