Precision Blanking Press Frame with Hydraulic Adjustment
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Solution Overview
Problem
Existing precision blanking press technologies lack sufficient stiffness, adjustability, and repeatability due to fixed upper cross heads and manual adjustment systems, leading to suboptimal precision and increased axial play, which affects the quality of cut parts.
Innovation Solution
A precision blanking press design featuring a one-piece core member with a separate stripping/pushing cylinder and ejector piston, pre-loading pistons, and a compact base with discus-shaped working surfaces, which eliminates axial play and enhances stiffness through hydraulic connection and saw-toothed threading, allowing for precise adjustment and high force transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed upper cross head is used, then the press frame structure is simple, but the upper clearance cannot be adjusted which makes it unsuitable for precision blanking
Solution Approach 1:
The upper cross head is replaced with an adjustable core member that can dynamically change its position relative to the top plate through threaded adjustment mechanisms, enabling clearance adjustment while maintaining structural integrity for precision blanking
Solution Approach 2:
The press frame is divided into separable components (top plate, core member, adjusting mechanism) that can be independently adjusted and assembled, allowing clearance modification without redesigning the entire frame structure
2Measurement precision
If a manual adjustment system is used, then the device complexity is reduced, but the adjustment repeatability and exactitude are insufficient
Solution Approach 1:
The manual hand-wheel adjustment mechanism is replaced with a hydraulic adjusting system that uses fluid pressure to rotate the adjusting nut, providing more precise and repeatable clearance adjustment while reducing operational complexity
Solution Approach 2:
A hydraulic motor is introduced to automatically rotate the adjusting nut through fluid pressure, enabling precise and repeatable clearance adjustment without manual intervention, thereby improving measurement precision while managing system complexity
3Reliability
If threaded cylinders with axial play are used, then the adjustment mechanism is simple, but the spindle rotation cannot be completely eliminated during blanking
Solution Approach 1:
Pre-loading pistons are introduced to apply preliminary axial force to the core member before the blanking operation, eliminating axial play and preventing spindle rotation during cutting, thereby ensuring adjustment stability without overcomplicating the cylinder structure
4Stability of the object's composition
If a rigid press frame with high mass is used, then the stiffness is improved, but the device mass and complexity increase
Solution Approach 1:
The press frame design transitions from heavy solid construction to a optimized structure using high-strength materials and strategic reinforcement only where needed (tie rods, columns), maintaining stiffness while significantly reducing overall mass through parameter optimization
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 design achieves higher cutting forces, improved operational safety, and precise clearance adjustment with reduced mass and complexity, ensuring high-stiffness and low-mass construction, thereby enhancing the precision and quality of cut parts.
Implementation Method 1
a hydraulic system for supplying the cylinder chambers disposed in the top and base with a fluid that is set to a predetermined pressure
Implementation Method 2
at least two pre-loading pistons...guided in a pre-loading cylinder chamber...The pre-loading pistons are connected together by way of an adjusting cross member such that an adjustment motion of the pre-loading piston and the piston rods applies an external vertical adjusting force to the core member
Data Source
AI summary
The invention relates to a precision blanking press including a top, a base and tie rods and columns that operatively connect the top and the base. The precision blanking press has a press frame with a high stiffness, low mass and simple design, the press allowing the transfer of higher cutting forces during fine blanking while safely eliminating axial play between adjustment elements and at the same time improving the operational safety.