The design of the clearance between the crankshaft and the copper bushing of a press machine follows a certain pattern, with an open tonnage of about 1/1200 and a closed tonnage of about 1/1000.Therefore, when making clearance adjustments between the crankshaft and the copper bushing of this type of machine tool, it is necessary to determine an optimum point of operating pressure in the first place. In addition, we need to observe the speed of rotation during continuous operation and determine whether the lubricant used is thick or thin. For different types of engines, their working conditions are different. the diameter of the crankshaft of a 100-ton press is usually like this
In the range of Φ180 to 200, the speed of a conventional non-high-speed punch press is about 50 times/minute. If thick oil is used for lubrication, it is recommended to keep the clearance around 0.15. At the same time, the cylindricity of shafts and holes should be strictly controlled, preferably below 0.02, during machining. In the case of using high speed and thin oil lubrication, it is necessary to appropriately expand the clearance of the fit.Antenna Shrapnel High Speed Punching Machine
Antenna Shrapnel High Speed Punching Machine
The matching clearance between the ends of the crankshaft of a 100-ton punch press and the brass bushing is not a constant value, but is determined by a number of different factors. Many of these are determined by process conditions, such as requirements for surface roughness of the part and dimensional tolerance requirements. Factors involved are the type of press (e.g., conventional non-high-speed or high-speed press), the lubrication method used (e.g., thick or thin oil lubrication), and the accuracy of the process.
Antenna Shrapnel High Speed Punching Machine
In a standard non-high-speed punch press design, the diameter of the crankshaft generally falls in the Φ180 to 200 range, and the speed of the crankshaft and the lubrication method will also have an impact on determining the fit clearance. For some small-sized parts or complex shaped shaft parts, the fit clearance can be reduced by appropriately increasing the oil flow rate, but when the speed increases other factors such as lubricant viscosity must be considered. For example, when the use of thick oil lubrication, the recommended clearance is generally about 0.15. If the use of thin oil lubrication, you can properly reduce the journal diameter. In addition, in the process, the shaft and hole cylindricity also need to be accurately controlled, usually recommended to control it in the range of 0.02, in order to achieve the best fit.
However, for high-speed presses and the use of thin oil lubrication, it may be necessary to appropriately expand the fit gap to accommodate high-speed operation and different lubrication conditions.
All things considered, in order to obtain an accurate fit clearance value, it is recommended that you consult the technical specifications provided by the press manufacturer or consult a professional engineer to ensure that the fit clearance between the press crankshaft and the copper bushings meets the needs of the equipment and the conditions of use. In addition, in the actual operation process, fine adjustments can be made according to the working conditions and performance of the equipment in order to realize the optimal working effect.
Antenna Shrapnel High Speed Punching Machine
High-speed punching machine compared to ordinary punching machine, there are mainly the following aspects of difference. First of all, the stamping speed, high-speed press is usually much faster, the number of times per minute can reach hundreds or even thousands of stamping, while the ordinary press is relatively slow.
Secondly, in terms of precision, the precision of high-speed presses is usually higher, to meet the needs of more precise parts stamping. Furthermore, the structural design and parts selection of high-speed presses pay more attention to stability and durability to adapt to the requirements of high-speed operation.
Dongguan OREKU Precision Machine Tool Co., Ltd., established in 2001, is a high-tech innovative enterprise dedicated to manufacturing high-precision machinery and equipment. Since its establishment, the company has focused on the R&D and manufacturing of CNC precision machining centers, precision stamping machining centers, high-speed vertical lathes and automated production lines, leading the development of the industry.
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