Method for reboring a shaft having a complex profile

A technology of re-boring and mandrel, applied to the parts of boring machine/drilling machine, the measurement of positioning in boring machine/drilling machine, manufacturing tools, etc., it can solve mechanical problems, complex problems, etc., and achieve simple manufacturing, simple operation, and reduced Quantity effect

Active Publication Date: 2016-12-14
SAFRAN AIRCRAFT ENGINES SAS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This operation is obviously complicated to handle, since the pilot diameter created in the pre-calibration phase no longer exists due to the failure of the first borehole
[0013] Generally speaking, the recontact of parts including reboring operations is always fine, but in the case of blind machining, there will be mechanical problems that cannot be solved

Method used

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  • Method for reboring a shaft having a complex profile
  • Method for reboring a shaft having a complex profile
  • Method for reboring a shaft having a complex profile

Examples

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Embodiment Construction

[0048] image 3 An example of the structure of the shaft 35 before calibration is shown. The shaft is machined to provide a pre-calibrated diameter 19 using a calibration head 20 to enable finishing operations using a finishing head. The guide assembly of the device proposed by the present invention makes it possible to repeat the drilling of the shaft 35 by the controlled pouring of resin into said shaft 35 in which the first hole has been drilled. The purpose is to reshape the cylindrical cavity 19 to form a guide channel for the calibration head and the finishing head. These devices include a plate 38 and a device 301 for securing the end piece 30 on which the shaft 35 is mounted.

[0049] Figure 4A An embodiment of the guide assembly of the present invention is represented, comprising a tube 32 made of 2mm-3mm incomparable steel mounted at each end centered on two end pieces 30,34.

[0050] The outer surface of the fixing tube 32 includes a coating which is anti-adhes...

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Abstract

A method for reboring a shaft (35) to be drilled, said shaft (35) having a hollow cavity (37) extending along a longitudinal axis, said method comprising the following steps of: introducing a holding tube (32) into the hollow cavity (37), the tube having a diameter that corresponds to the desired precalibration diameter of the shaft (35); injecting a resin (33) between the internal wall of the cavity (37) in the shaft (35) and the external surface of the tube (32); withdrawing the tube (32) following the curing of the resin (33), the space (19) freed by the holding tube (32) providing a guiding function for reboring the shaft; carrying out a first, machining reboring operation on the shaft (35) by pushing a calibration head (20) introduced along the longitudinal axis of the shaft (35) into the freed space (19); carrying out a second, finishing reboring operation on the shaft (35) by pulling a finishing head (51) into the shaft (35) in order to machine the freed space (19) with a varying diameter.

Description

technical field [0001] The field of the invention relates to methods for machining shafts produced with different calibration heads when the contour to be produced is complex, that is to say has a varying diameter. More specifically, the method of the invention relates to the reboring of a part, such as a shaft, when the part has already been drilled and when minimum mechanical tolerances have not been maintained during said first drilling. Background technique [0002] Currently, there is a need to manufacture specific bores for shafts with complex profiles. When the shaft is profiled during drilling, it brings about a defined change in the inner diameter of the shaft. A change in diameter leads to a change in shape, which makes machining more or less difficult and for this reason tolerances are difficult. [0003] As an example, a bottle shape can be produced which corresponds to a variation in the diameter of a borehole whose profile resembles that of the bottle. figur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B41/00B23B49/02
Inventor 克劳德·杰拉德·雷内·德杰布鲁诺·比思卡蒂西里尔·杜安迪
Owner SAFRAN AIRCRAFT ENGINES SAS
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