Multipoint Crank Press Slide Adjustment for Parallelism Alignment
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Solution Overview
Problem
In multipoint crank presses, installation and machining errors lead to nonparallelism between the sliding block and the working table, causing inaccurate movement, guide rail wear, and reduced machining precision and die service life, resulting in significant production losses.
Innovation Solution
A device with an eccentric pin shaft micro-adjustment mechanism, comprising a crank, connecting rods, and bevel gears, is used to adjust the sliding block, allowing for precise alignment and elimination of gaps through hydraulic loading and fine-tuning of eccentric pin shaft positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional installation and machining processes are used, then manufacturing cost and simplicity are maintained, but manufacturing precision and alignment accuracy deteriorate due to connection gaps and errors
Solution Approach 1:
The invention uses an eccentric pin shaft mechanism that changes the positional parameter of the sliding block through eccentric rotation. By rotating the eccentric pin shaft, the position of the sliding block relative to the working table can be adjusted, thereby improving alignment precision without requiring complex reassembly procedures.
Solution Approach 2:
The invention introduces an intermediary adjustment mechanism (eccentric pin shaft with bevel gears) between the sliding block and the fixed structure. This intermediary device mediates the alignment issue by providing a controlled adjustment capability, allowing precise positioning while maintaining structural simplicity.
2Reliability
If traditional fixed installation is used, then device complexity is low, but reliability deteriorates due to guide rail wear and mechanism damage
Solution Approach 1:
The invention transforms the fixed installation into a dynamic adjustable system. The eccentric pin shaft can be rotated to adjust the sliding block position, and the bevel gears provide a mechanism for controlled movement. This dynamic capability allows for compensation of wear and misalignment, improving reliability while adding only moderate complexity.
3Manufacturing precision
If traditional installation methods are used, then ease of manufacture is maintained, but manufacturing precision deteriorates due to nonparallelism between sliding block and working table
Solution Approach 1:
The invention incorporates preliminary adjustment capabilities into the assembly process. The eccentric pin shaft mechanism allows for pre-adjustment of the sliding block position during assembly, ensuring proper parallelism before final operation. This preliminary action prevents the need for complex post-assembly adjustments.
Solution Approach 2:
The eccentric pin shaft mechanism provides self-adjustment capability that can be operated by the assembler during installation. By rotating the pin shaft and observing the alignment, the assembler can achieve proper parallelism without requiring specialized equipment or complex procedures, maintaining ease of manufacture while improving precision.
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 solution ensures high-precision assembly and operation of multipoint crank presses, improving machining accuracy and extending die service life by eliminating nonparallelism and lateral forces, thereby reducing production losses.
Implementation Method 1
each of the eccentric pin shaft micro-adjustment mechanism includes an eccentric pin shaft, a large bevel gear and a small bevel gear; wherein one end of the eccentric pin shaft is provided with a positioning part, and an eccentric part is disposed at the position on the eccentric pin shaft close to the positioning part
Implementation Method 2
the large bevel gear sleeves the eccentric pin shaft, the large bevel gear is meshed with the small bevel gear, and an axis of the small bevel gear perpendicularly intersects with an axis of the eccentric pin shaft
Data Source
AI summary
The present invention discloses a device and method for installing and adjusting a sliding block of a multipoint crank press. The device comprises a crank, a connecting rod with an end provided with a U-shaped notch, a sliding block and an eccentric pin shaft micro-adjustment mechanism. The eccentric pin shaft micro-adjustment mechanism is installed at the joint between the connecting rod and the sliding block. The crank, the connecting rod and the sliding block of the multipoint press are normally machined and installed through a classical process, so that the sliding block of the multipoint press runs to a bottom dead center. A gap among mechanisms is eliminated through the loading by a hydraulic loader. The position of one set of crank, connecting rod and sliding block mechanism is taken as a reference, and then the eccentric positions and directions of the eccentric pin shafts at other adjustment positions are finely adjusted, thus realizing high-precision assembly and operation of the multipoint press.