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Foshan Li Dexin Machinery Manufacturing Co., Ltd.

Foshan Li Dexin Machinery Manufacturing Co., Ltd.

Specializing in the production of TCT circular saw blades, TCT band saw blades, finger joint knives, flying knives, various non-standard CNC grinding machine production lines

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Structural Design of Static Pressure Direct Drive Turntable of Large Forming Gear Grinding Machine

  • Time of issue:2020-09-21 19:45

(Summary description)Structural Design of Static Pressure Direct Drive Turntable of Large Forming Gear Grinding Machine

Structural Design of Static Pressure Direct Drive Turntable of Large Forming Gear Grinding Machine

(Summary description)Structural Design of Static Pressure Direct Drive Turntable of Large Forming Gear Grinding Machine

  • Time of issue:2020-09-21 19:45
Structural Design of Static Pressure Direct Drive Turntable of Large Forming Gear Grinding Machine
At present, the working table of the domestically produced gear grinding machine is a worm gear structure. Compared with similar international products in terms of specifications, overall accuracy and functions, there is still a big gap, and it is at a disadvantage in market competition, especially Large-scale gear grinding machines with a machining diameter of more than 2,000 mm, a load of more than 40 t, and a precision of more than 4 are all monopolized by a few foreign manufacturers. This status quo is extremely out of proportion to the rapid development of the national economy in my country.
 
 
 
 
The direct drive table of the large-scale precision CNC gear grinding machine adopts the torque motor direct drive form, which eliminates the worm-worm transmission structure. It has a short transmission chain, no mechanical wear, high transmission efficiency, "zero" backlash, good rigidity, and accurate positioning. , Good accuracy retention and other characteristics.
 
The grinding accuracy of gears first needs to enhance the rigidity of the machine tool and improve the vibration resistance. The hydrostatic guideway and hydrostatic bearing that work under high-speed and heavy-load conditions must comprehensively consider the dynamic pressure effect, thermal effect, squeeze film effect, and oil Compressibility effect. The project will focus on the number and parameters of the oil cavity of the hydrostatic guide rail and the bearing, as well as structural design, manufacturing and assembly processes, material selection, high-speed moving feed components, oil supply methods, oil temperature effects, oil film temperature control, filter devices, etc. the study. The goal of the research is to improve the precision, load-carrying capacity and damping characteristics of guide rails and bearings, and develop robust design ideas to reasonably equip bearings and design parameters to reduce the impact of dynamic unbalanced force, cutting force and cutting vibration of rotating parts on machining accuracy. Utilize the stiffness, damping and good vibration absorption ability of the pressure oil film to improve the smoothness of movement, and at the same time use the pressure oil film to homogenize the error to improve the rotation accuracy.
 
The static pressure direct drive table has a diameter of 4 000 mm, a maximum load-bearing capacity of 80 t, and a floating lift of 0.01 mm. The positioning accuracy of the C axis can reach 3″, the end face runout accuracy of the worktable can reach within 0.005 mm, and the final gear grinding accuracy can reach level 4 or more (including level 4).
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