Two-Crossbeam Forging Press Structure Without Hollowed Crossbeams
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Solution Overview
Problem
Existing three-crossbeam hydraulic presses are heavy, require hollowing out crossbeams for oil cylinders, reducing rigidity and strength, increasing manufacturing difficulty, and weakening bending resistance, leading to large size and high cost.
Innovation Solution
A lightweight two-crossbeam design with a fixed and movable crossbeam, integrating a hydraulic cylinder through a column and through hole, forming an annular oil chamber without needing a central hole in the movable crossbeam, and using a return oil cylinder for movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a traditional three-crossbeam structure is used with oil cylinders mounted on crossbeams, then the hydraulic press can achieve sufficient pressing force, but the crossbeams must be hollowed out which reduces their rigidity and strength, increases manufacturing difficulty, and weakens bending resistance
Solution Approach 1:
The patent transitions from mounting oil cylinders on the upper or lower surfaces of crossbeams to integrating them within the column's axial space. This dimensional repositioning allows the hydraulic system to occupy vertical space rather than compromising horizontal crossbeam integrity, thereby maintaining crossbeam strength while achieving pressing force.
Solution Approach 2:
The oil cylinders are nested within the column structure, specifically utilizing the space between the column's outer surface and the movable crossbeam. This nesting approach allows the hydraulic system to be contained within the existing structural envelope without requiring separate mounting locations that would compromise crossbeam integrity.
2Strength
If the height and cross-sectional area of crossbeams are increased to compensate for strength loss from hollowing, then crossbeam strength is improved, but the overall weight of the hydraulic press increases significantly
Solution Approach 1:
By relocating the oil cylinder mounting from crossbeam surfaces to the column's axial space, the design eliminates the need to increase crossbeam dimensions for strength compensation. This dimensional shift prevents weight increase while maintaining structural integrity.
3Stress or pressure
If a three-crossbeam structure with large-size cast-forged steel crossbeams is used to ensure rigidity and strength for high-tonnage applications, then the hydraulic press can handle several thousand to tens of thousands of tons, but the large size and mass make it costly to manufacture and difficult to mount
Solution Approach 1:
The patent relocates the hydraulic system to the column's axial space, which allows for more efficient load transmission paths. This dimensional repositioning enables the structure to handle high tonnage with reduced crossbeam sizes, simplifying manufacturing while maintaining stress-bearing capacity.
Solution Approach 2:
The movable crossbeam is extracted from the traditional three-crossbeam configuration and repositioned to work directly with the column-integrated hydraulic system. This extraction simplifies the overall structure by eliminating redundant crossbeams, reducing manufacturing complexity for high-tonnage applications.
4Length of stationary object
If oil cylinders are mounted on crossbeams to reduce overall height, then the hydraulic press achieves compact dimensions, but the crossbeam structure is damaged and bending resistance is greatly weakened
Solution Approach 1:
The patent achieves compact height by integrating oil cylinders within the column's axial space rather than mounting them on crossbeam surfaces. This dimensional repositioning maintains crossbeam integrity and bending resistance while achieving the desired compact overall height.
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 reduces overall weight and height, simplifies structure, enhances rigidity and bending resistance, lowers manufacturing and mounting costs, and improves production efficiency and energy efficiency.
Implementation Method 1
when a pressure in the annular closed oil chamber rises, hydraulic oil can push the movable crossbeam close to the fixed crossbeam to complete the pressing of a workpiece
Implementation Method 2
a return oil cylinder, connected between the movable crossbeam and the fixed crossbeam for driving the movable crossbeam away from the fixed crossbeam
Data Source
AI summary
Disclosed is a lightweight two crossbeam high-speed free forging hydraulic press. The hydraulic press includes a fixed crossbeam, a movable crossbeam, a column, and a return oil cylinder. By integrating a hydraulic cylinder with a through hole for the column to slide, an annular hydraulic cylinder is formed between the movable crossbeam and the column, and no hole is required to be specially provided on the movable crossbeam for mounting the hydraulic cylinder. Therefore, the rigidity, strength and bending resistance of the movable crossbeam serving as an upper crossbeam or a lower crossbeam can be effectively guaranteed, the crossbeam structure is simplified, and the manufacturing difficulty is reduced. Meanwhile, compared with the existing hydraulic press of a three-crossbeam structure, the two-crossbeam hydraulic press can greatly reduce the overall dimension and mass of the high-speed forging hydraulic press, reduce the overall height of the hydraulic press.