Press Brake Tool Holder Guide Structure for Parallel Alignment
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Solution Overview
Problem
In stand-alone press brakes, the attachment of a guide member to an upper tool holder is difficult due to space constraints, leading to inaccurate parallelism and interference issues, which affect the reliability of the upper tool changing unit and the stability of bending operations.
Innovation Solution
A press brake design with an attachment base on the upper table surface featuring protruding tabs and connecting members, along with guide members and regulating members, ensures accurate alignment and stability by maintaining parallelism and preventing lateral misalignment of the upper tool holder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a guide member is attached directly to an upper tool holder, then parallelism between the guide member and upper tool holder can be maintained with high accuracy, but space constraints prevent this attachment in stand-alone press brakes equipped with upper tool changing units
Solution Approach 1:
The patent introduces an intermediary structure (the attachment base with protruding tabs and connecting members) that mediates between the upper tool holder and the guide member. This intermediary allows the guide member to be positioned accurately relative to the upper tool holder without direct attachment, resolving the space constraint while maintaining parallelism accuracy.
2Volume of moving object
If multiple connecting members are arranged on the back surface of the upper table to support the guide member, then space constraints are addressed, but the attachment reference surfaces become different, making it difficult to maintain high parallelism accuracy
Solution Approach 1:
The attachment system is segmented into multiple components: the attachment base with protruding tabs, the connecting members, and the guide member. Each segment has a specific function and attachment reference surface, allowing them to be independently positioned and adjusted to achieve both space utilization and high parallelism accuracy.
Solution Approach 2:
The connecting members act as intermediaries that transfer the attachment reference from the front surface of the upper table (where the upper tool holder is attached) to the back surface (where the guide member is positioned). This intermediary mechanism ensures that both components share the same attachment reference surface, maintaining high parallelism accuracy.
3Adaptability or versatility
If the upper tool holder is made adjustable in the left-right direction, then interference from side flanges can be avoided, but alignment accuracy and stability during bending operations may be compromised
Solution Approach 1:
The upper tool holder is designed with dynamic adjustability in the left-right direction, allowing it to be repositioned according to different workpiece configurations. The guide member and connecting members provide stable support that maintains alignment accuracy even when the tool holder position is adjusted, resolving the contradiction between adaptability and precision.
Data Source
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AI summary
An attachment base (28) extending in a left-right direction is provided on a lower end side of a front surface of an upper table (24) of a press brake (10). On the attachment base (28), a plurality of protruding tabs (32) protruding downward are formed at intervals in the left-right direction. An upper tool holder (38) is disposed between the protruding tabs (32) adjacent to each other in the left-right direction in the front surface of the attachment base (28). A connecting member (64) is attached to a back surface of each protruding tab (32), and the connecting member (64) includes a distal end located on a back side of the upper table (24). A guide member (70) supporting a moving body (74) movably in the left-right direction is coupled to a distal-end face of the connecting member (64).