Press Brake Attachment Base for Tool Holder Parallelism
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Solution Overview
Problem
In stand-alone press brakes, space constraints prevent direct attachment of a guide member to the upper tool holder, leading to difficulties in maintaining parallelism and reliability of the upper tool changing unit, and increased deflections during bending cause side misalignment and bending defects.
Innovation Solution
A press brake design featuring an attachment base with protruding tabs and connecting members that support the upper tool holder and guide member, along with regulating members to prevent side misalignment, ensures accurate parallelism and stability during tool changing and bending operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a guide member is attached directly to the upper tool holder, then parallelism between the guide member and upper tool holder can be maintained with high accuracy, but space constraints in stand-alone press brakes prevent direct attachment
Solution Approach 1:
An attachment base is introduced as an intermediary component between the upper tool holder and the press brake body. The attachment base includes a mounting surface that attaches to the press brake and protruding tabs that engage with the upper tool holder, thereby mediating the connection and enabling the guide member to be properly positioned without direct attachment to the tool holder itself.
Solution Approach 2:
The attachment system is divided into separate functional components: the attachment base (with mounting surface and protruding tabs), the upper tool holder, and the guide member. This segmentation allows each component to be optimized independently while maintaining their relative positions through the engagement mechanism.
2Adaptability or versatility
If the upper tool holder is made adjustable in the left-right direction to avoid side flange interference, then flexibility is improved, but side misalignment occurs due to table deflection during bending
Solution Approach 1:
The attachment base provides a fixed reference framework (protruding tabs at specific positions) that establishes local quality constraints for the upper tool holder. While the tool holder can be adjusted within the framework, the protruding tabs ensure that critical alignment parameters are maintained, creating different degrees of freedom in different directions.
Solution Approach 2:
The system allows changes in positional parameters (left-right adjustment for avoiding side flange interference) while maintaining other critical parameters (parallelism and alignment) through the geometric constraints provided by the attachment base and protruding tabs.
3Device complexity
If connecting members are arranged at intervals on the back surface to support the guide member, then space constraints are addressed, but parallelism between the guide member and upper tool holder becomes difficult to maintain
Solution Approach 1:
The attachment base merges multiple functions into a single component: it provides the mounting surface for the press brake, supports the protruding tabs for tool holder engagement, and establishes the reference framework for guide member alignment. This consolidation ensures that all these elements share a common reference system, maintaining parallelism accuracy.
Data Source
AI summary
An attachment base extending in a left-right direction is provided on a lower end side of a front surface of an upper table of a press brake. On the attachment base, a plurality of protruding tabs protruding downward are formed at intervals in the left-right direction. An upper tool holder is disposed between the protruding tabs adjacent to each other in the left-right direction in the front surface of the attachment base. A connecting member is attached to a back surface of each protruding tab, and the connecting member includes a distal end located on a back side of the upper table. A guide member supporting a moving body movably in the left-right direction is coupled to a distal-end face of the connecting member.