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Optimization method for distance between headstock bearings of large ship used crankshaft lathe

A crankshaft lathe and bearing spacing technology, applied in metal processing equipment, etc., can solve the problems of late start, short time, time-consuming and laborious, etc., and achieve the effect of shortening the optimization time

Inactive Publication Date: 2010-01-20
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the cycle time from design to production of crankshaft lathes is getting shorter and shorter. Our country started relatively late in this area. There is not a lot of experiments and experience data. It is time-consuming and labor-intensive to do many physical prototypes for experiments to obtain optimization results, and the cost is too high. high

Method used

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  • Optimization method for distance between headstock bearings of large ship used crankshaft lathe
  • Optimization method for distance between headstock bearings of large ship used crankshaft lathe
  • Optimization method for distance between headstock bearings of large ship used crankshaft lathe

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Embodiment Construction

[0022] The simulation analysis method of the present invention will be further described below in conjunction with the accompanying drawings.

[0023] Taking static analysis as an example, the specific steps are as follows figure 1 Shown:

[0024] 1. Use PRO / ENGINEER for precise 3D geometric modeling

[0025] Use PRO / ENGINEER for precise modeling and assemble the model, such as figure 2 shown. image 3 is an exploded representation of the parts of the assembly drawing, showing that the model accurately simulates the actual physical model.

[0026] 2. Enter the PRO / ENGINEER sub-module PRO / MECHANICA, and impose physical constraints and various loads.

[0027] Set the physical characteristics of the model, various loads, boundary conditions and contact areas.

[0028] 3. Set the stiffness of the bearing

[0029] In various crankshaft lathes, there are various bearings, and the rigidity performance of each bearing is also different. Therefore, it should be set differently ...

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Abstract

The invention relates to an optimization method for distance between headstock bearings of large ship used crankshaft lathe, comprising the following steps: using PRO / ENGINEER to carry out the three-dimension geometric modeling; entering PRO / MECHANICA submodule of PRO / ENGINEER to definite the physical attribute of the model, the boundary condition and the load; carrying out the meshing to the model; carrying out the finite element simulation analysis; changing the distance between mainshaft bearings and the like to figure out the finite element in order to obtain analysis results; and comparing the analysis results to obtain the best distance between bearings in order to finally increasing the precision of crankshaft lathes. The method mainly uses PRO / ENGINEER and PRO / MECHANICA submodule thereof to carry out the three-dimension modeling, and carries out the finite element analysis under the seamless connecting condition. Because of using P method to deal with finite cells, the headstock can be automatically folded for stimulating the integrated transformation of the headstock of the large ship used crankshaft lathe with high-precision, and the time for optimization can be greatly shortened.

Description

technical field [0001] The invention relates to a method for optimizing the bearing spacing of the headstock of a lathe, in particular to an optimization method for the bearing spacing of the headstock of a marine crankshaft lathe. Background technique [0002] In large marine crankshaft lathes, the headstock part is one of the core parts of the lathe, and the selection of the spindle bearing support distance in the headstock has always been a difficult point. The selection of the spindle support distance abroad is based on a large number of experimental data based on experience. At present, the cycle time from design to production of crankshaft lathes is getting shorter and shorter. Our country started relatively late in this area. There is not a lot of experiments and experience data. It is time-consuming and labor-intensive to do many physical prototypes for experiments to obtain optimization results, and the cost is too high. high. Therefore, it is necessary to need a ...

Claims

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Application Information

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IPC IPC(8): B23B19/00
Inventor 周晓玲汪中厚周鹤群赵东升
Owner UNIV OF SHANGHAI FOR SCI & TECH
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