Dry cutting numerical control gear hobbing machine tool cutting space temperature rise optimal regulation method

A CNC machine tool and space technology, applied in the direction of control/regulation system, adaptive control, general control system, etc., can solve problems such as the optimal control method of the cutting space temperature rise of dry cutting machine tools

Active Publication Date: 2018-05-15
CHONGQING UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, there is no report on the optimal control method for the temperature rise of the cutting space of the dry cutting machine tool.

Method used

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  • Dry cutting numerical control gear hobbing machine tool cutting space temperature rise optimal regulation method
  • Dry cutting numerical control gear hobbing machine tool cutting space temperature rise optimal regulation method
  • Dry cutting numerical control gear hobbing machine tool cutting space temperature rise optimal regulation method

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Experimental program
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Effect test

Embodiment 1

[0091] see Figure 1 to Figure 3 , a dry-cut CNC gear hobbing machine tool cutting space temperature optimization control method, the main steps are as follows:

[0092] 1) Establish the heat accumulation model and heat balance model in the cutting space of the dry cutting CNC gear hobbing machine tool. The main steps are as follows:

[0093] 1.1) According to the law of energy conservation, the heat accumulation model of the cutting space of the dry cutting CNC gear hobbing machine tool during the machining process is established. The heat accumulation model is expressed as follows:

[0094] Q accum =Q cut -(Q chip +Q workpiece +Q comair +Q exhair +Q tel ). (1)

[0095] In the formula, Q accum Heat accumulated in the cutting space. Q cut is the cutting heat generated in the cutting space. Q chip It is the heat taken away by chips when they leave the cutting space. Q workpiece It is the heat taken away by the workpiece when it moves out of the cutting space. ...

Embodiment 2

[0169] see Figure 4 to Figure 6 , This embodiment takes the high-speed dry cutting and hobbing machine tool as the object.

[0170] The main steps of optimizing and controlling the temperature rise in the cutting space of the high-speed dry cutting gear hobbing machine are as follows:

[0171] 1) Determine the basic parameters of the high-speed dry cutting gear hobbing machine tool. That is, the hob speed range is 100 ～ 1500r / min, the hob axial feed speed range is 1 ～ 1000mm / min, the rated power of the spindle motor P max 15kW. The maximum displacement of the air exchange device is 1500m 3 / h, and the ambient temperature of the workshop is 21°C. The base material of the dry cutting hob is S390, and the coating material is TiAlN. The normal modulus of the hob is 2.5mm, the number of heads is 2, the number of grooves is 15, the diameter is 80mm, and the helix angle is 1°56'. The number of teeth of the processed gear workpiece is 36, the normal pressure angle is 20°, the...

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Abstract

The invention discloses a dry cutting numerical control gear hobbing machine tool cutting space temperature rise optimal regulation method. The method mainly comprises the following steps: 1) a dry cutting numerical control gear hobbing machine tool cutting space heat accumulation model and a heat balance model are built; 2) dry cutting numerical control gear hobbing machine tool cutting space temperature rise optimal regulation is carried out; 3) a dry cutting numerical control gear hobbing machine tool cutting space temperature rise optimal regulation model is solved, and thus, values of a hob rotation speed nh, a hob axial feeding amount fa, low-temperature compressed air temperature Tcom and an air commutation device exhaust volume Vexh when Tspace-T1 is the minimum are acquired; and 4) the hob rotation speed nh, the hob axial feeding amount fa, the low-temperature compressed air temperature Tcom and the air commutation device exhaust volume Vexh which are acquired after optimization are used for dry cutting gear hobbing processing.

Description

technical field [0001] The invention relates to the field of dry cutting numerical control gear hobbing processing, in particular to a method for optimizing and controlling the temperature rise of a cutting space of a dry cutting numerical control gear hobbing machine tool. Background technique [0002] Dry cutting CNC gear hobbing technology is an emerging green and efficient gear manufacturing process in recent years. However, due to the lack of cooling and lubrication of cutting oil, cutting heat is the main cause of rapid wear of the hob and thermal deformation of the machine tool in dry cutting CNC gear hobbing. [0003] In dry cutting CNC gear hobbing, the use of a large inclined stainless steel protective cover prevents chips from entering the moving parts such as guide rails, and also prevents high-temperature chips from transferring cutting heat to the main body of the machine tool, which is conducive to ensuring the machining accuracy of the machine tool. However,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 曹华军李本杰杨潇陈二恒曾丹
Owner CHONGQING UNIV
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