Press Brake Upper Die Inclined Stop Projection Alignment
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Solution Overview
Problem
In press brake systems, the temporary clamping of upper dies in the upper die mounting groove often results in slight displacement and inclination issues due to gaps between the die and the groove, leading to errors in die positioning and bending processes.
Innovation Solution
The implementation of a stop piece with an inclined stop projection that engages with a stop groove, utilizing a resilient member to apply an upward force and minimize the gap between the upper die and the mounting groove, preventing displacement and ensuring precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a stop piece with inclined stop projection is used to engage with the stop groove, then the upper die positioning precision is improved, but the device complexity increases
Solution Approach 1:
The inclined stop projection performs preliminary positioning action before final clamping. By engaging the stop projection with the stop groove in advance, the upper die is pre-positioned in the correct location, preventing displacement during subsequent clamping operations. This preliminary positioning action ensures manufacturing precision without requiring complex adjustment mechanisms during the clamping process itself.
Solution Approach 2:
The inclined stop projection acts as an intermediary element between the upper die and the mounting groove. It mediates the positioning function by providing a controlled engagement surface that guides the upper die into the correct position, reducing direct contact and potential displacement between the clamping surfaces while maintaining positioning precision.
2Stability of the object's composition
If the resilient member applies upward force to minimize the gap, then the die positioning stability is improved, but the force requirements increase
Solution Approach 1:
The resilient member applies an upward counteracting force to balance the downward gravitational force and minimize the gap between the upper die and the mounting groove. This counterweight action stabilizes the die position by continuously pressing the stop projection against the stop groove, ensuring positioning stability without requiring excessive clamping force from the main clamping mechanism.
Solution Approach 2:
The resilient member provides beforehand cushioning by pre-loading the stop projection into the stop groove before the main clamping force is applied. This prior cushioning action eliminates gaps and prevents potential displacement, creating a stable positioned state that requires less additional force to maintain during the clamping process.
3Manufacturing precision
If the inclined face lifts the upper die to contact the upper face of the mounting groove, then the displacement is reduced, but the manufacturing complexity increases
Solution Approach 1:
The inclined face performs preliminary lifting action to bring the upper die into contact with the upper face of the mounting groove before final clamping. This preliminary contact establishes the correct vertical position and prevents displacement during clamping, ensuring manufacturing precision without requiring complex post-manufacturing adjustments or specialized manufacturing processes.
Solution Approach 2:
The inclined face provides a curved engagement surface that smoothly guides the upper die into the correct position. This curvature allows for self-alignment and gradual contact, reducing the risk of misalignment and displacement while maintaining ease of manufacture through standard machining operations.
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 configuration effectively suppresses left-right displacement and maintains precise positioning of the upper die during clamping and release cycles, enhancing the accuracy of bending processes by maintaining the die in a vertical state.
Implementation Method 1
a resilient member that pushes the stop piece in a direction to project out of the surface of the upper die
Data Source
AI summary
An upper die 9B is removable in an up-down direction with respect to an upper die mounting groove 5 that is arranged in a left-right direction at a lower part of an upper table 1 of a press brake. The upper die includes a stop piece 19A having a stop projection 31 that is engageable with a stop groove 7 that is formed in the left-right direction in each of upper die contact faces 5F and 5R which face each other in a front-rear direction, the stop piece 19A being movable out of and into a surface of the upper die 9B and pushed in a direction to project out of the surface of the upper die. A bottom face 35 of the stop projection 31 for engaging with the stop groove 7 is an inclined face that rises toward a front end of the stop projection.