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Turning process for primary planet carrier of gear box of 3.5 megawatt wind generating set

A technology of wind power generators and planetary carriers, which is applied in metal processing equipment, metal processing machinery parts, turning equipment, etc. It can solve problems such as explosive blades/burning knives, decreased accuracy of machine tools, and tool wear, and achieves convenient clamping of workpieces Fast, guaranteed uniformity of strength, and the effect of saving tool costs

Active Publication Date: 2021-09-17
惠尔信机械(泰兴)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the material after normalizing is more difficult to process, and the time is longer
The current process schemes are as follows: rough turning plus semi-finishing turning after casting normalizing; It is difficult to process after fire, and it is impossible to turn quickly / large depth of cut, resulting in a single-piece processing time of more than 20H
2), processing after normalizing is easy to break the blade / burn the knife, the cost of the tool is high, and the non-processing time is prolonged due to shutdown processing
3), the material is very hard after normalizing, and the rigidity of the machine tool will be severely damaged by roughing for a long time, resulting in a decrease in the accuracy of the machine tool. Uniform, irregular, some areas do not meet customer requirements
The disadvantages of the latter process plan are: 1), local deformation after heat treatment, resulting in a long time for the correction of the finishing clip
2), due to normalizing heat treatment will cause local deformation of the workpiece
Therefore, there is a risk of severe deformation leading to scrapping 3), the surface is very hard after normalizing heat treatment, and the tool wears seriously during finishing turning, which is very unfavorable for finishing turning

Method used

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  • Turning process for primary planet carrier of gear box of 3.5 megawatt wind generating set
  • Turning process for primary planet carrier of gear box of 3.5 megawatt wind generating set
  • Turning process for primary planet carrier of gear box of 3.5 megawatt wind generating set

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as Figure 1 to Figure 4 As shown, the planetary carrier hydraulic tooling includes a first-order tooling for turning the front side of the planetary carrier and a second-order tooling for turning the reverse side of the planetary carrier. Datum pin hole 1; Workpiece support 2 driven by hydraulic parts 9 for centering positioning is slid on the tooling bottom plate 4 of the first-order tooling, and the slide rail 6 on which the workpiece support 2 slides is provided with a limit plate for automatic workpiece correction 3. The bottom of the first-order tooling and the second-order tooling share a tooling base plate 4, and an upper base plate 5 of the first-order tooling used for automatic correction and hydraulic clamping is also adapted on the tooling base plate 5, and the upper base plate 5 is fixed. Rail 6, on slide rail 6, slide plate 7 is slidably arranged, and described workpiece support 2 and the pressure plate 8 for hydraulic pressure clamping workpiece are...

Embodiment 2

[0028] The difference from Embodiment 1 is that, as Figure 5 As shown, the planetary carrier hydraulic tooling includes a first-order tooling for turning the front of the planetary carrier and a second-order tooling for turning the reverse side of the planetary carrier. Datum pin hole; The lathe is provided with the pin shaft 16 that is adapted with described datum pin hole, and the size of pin shaft is less than the size of datum pin hole, and ring-shaped rubber inflatable air bag 17 is set up around the pin shaft; The inflation tube of rubber inflatable air bag passes through It is connected to the air pump through the through hole provided on the machine tool, and the rubber inflatable air bag is in the shape of a stepped ring.

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Abstract

The invention discloses a turning process for a primary planet carrier of a gearbox of a 3.5 megawatt wind generating set. The turning process comprises the following process steps of rough turning of the planet carrier, normalizing treatment of a casting and semi-finish turning of the planet carrier. The method is low in rough turning difficulty as a result of non-normalizing. The cutter cost is saved, and machine tool precision is protected; the rough turning allowance is 4 mm on a single side and is enough to cover casting deformation caused by normalizing. After normalizing heat treatment, the unilateral allowance of 4 mm is not too much, and it is not difficult to perform semi-finish turning; due to the fact that rough turning is conducted before heat treatment, and the single-side allowance is 4 mm, the workpiece can be clamped conveniently and rapidly during semi-finish turning without correcting the center. After semi-finish turning, the hardest part of the surface is removed, but the removal amount is only about 4 mm, so that the subsequent finish turning is facilitated, and the strength uniformity of the surface is ensured. The complete working time of a single piece is shortened to about 12H.

Description

technical field [0001] The invention relates to a processing technology for a first-stage planetary frame vehicle of a gear box of a 3.5 megawatt wind power generating set. Background technique [0002] As the main part of large-scale power equipment, the planetary carrier must meet high requirements for its material and strength. According to customer specifications: use ductile iron 700 material, tensile strength ≥ 550MPa, yield strength ≥ 340MPa, tensile coefficient ≥ 2%. Such as figure 1 , figure 2 . The hardness is 235-280HB; in order to meet the above requirements, the cast must be subjected to normalizing heat treatment. But the material after normalizing is more difficult to process, and the time is also longer. The current process plan has the following two types: rough turning plus semi-finishing turning after casting normalizing; or rough turning plus semi-finishing turning before casting normalizing; the disadvantages of the former traditional process plan ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P23/04B23Q3/00B23B5/00
CPCB23P23/04B23Q3/00B23B5/00B23Q2703/04
Inventor 徐惠民何军项苏建
Owner 惠尔信机械(泰兴)有限公司
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