A precision self-healing method for internal spray cooling spindle
An internal spray type, spindle technology, applied in the direction of program control, instrument, computer control, etc., can solve the problems that are not involved, and achieve the effect of improving machining accuracy, high accuracy and good robustness
Active Publication Date: 2021-10-15
DALIAN UNIV OF TECH
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However, none of the above invention patents involves the self-healing method for researching the thermal tilt error accuracy of the ultra-low temperature cooling machine tool spindle
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[0021] The specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and technical solutions. In the embodiment, the heat sink (4-4) at the hot end of the thermoelectric refrigeration device (4) adopts forced convection of a fan to dissipate heat.
[0022] The specific implementation is as follows:
[0023] Step 1, the temperature rise sensitive point of the internal injection ultra-low temperature processing machine tool, and the thermal tilt error test. Arrange multiple temperature sensors on the internal spray ultra-low temperature processing machine tool, and take such measures as Figure 5 The shown setup measures the thermal tilt error e at the end of the spindle θ , the measured value e of displacement sensor 1 (11-2-a) 1 , the measured value e of the displacement sensor 2 (11-2-b) 2 , the thermal tilt error is calculated according to the following formula:
[0024]
[0025] Let the machine to...
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The invention discloses a precision self-healing method for an internal spray cooling spindle, which belongs to the technical field of thermal deformation of the spindle of a numerical control machine tool. Establish the relationship model between the current of the thermoelectric cooler, the state parameters of the machine tool, and the temperature of the key points of the machine tool, and formulate the active control strategy function and active control system of the internal injection spindle temperature field; when the spindle self-heals, according to the temperature of the key points The value and the running state of the machine tool can be changed in real time to change the input current of the thermoelectric cooler, thereby controlling the temperature field of the machine tool and realizing the self-healing of the thermal tilt error. This method uses a thermoelectric cooler as an active thermal controller. By establishing a thermal tilt error model and a spindle self-healing control strategy, it can actively control the temperature of the thermal tilt error control sensitive point of the internal injection ultra-low temperature processing machine tool, and realize the precision self-healing of the internal injection spindle. , has the advantages of high accuracy, good robustness, and quick response, solves the thermal tilt error problem of the internal spray ultra-low temperature processing machine tool, and improves the processing accuracy of the machine tool.
Description
technical field [0001] The invention belongs to the technical field of thermal deformation of a CNC machine tool spindle, and in particular relates to an internal spray cooling spindle precision self-healing method. Background technique [0002] In aerospace and other fields, in order to meet the high service performance requirements under extreme working conditions, the core components of high-end equipment widely use advanced materials represented by titanium alloys and composite materials. However, the above-mentioned materials often exhibit characteristics such as high viscosity, high toughness, and low thermal conductivity, which are difficult to process. The cutting temperature is high during processing, and the cooling efficiency of the emulsion is obviously insufficient. Experiments have shown that applying ultra-low temperature media such as liquid nitrogen to local cutting areas can effectively reduce the extremely high cutting heat of difficult-to-machine material...
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IPC IPC(8): B23Q17/00B23Q11/12G05B19/404
CPCB23Q11/127B23Q17/00G05B19/404
Inventor 王永青班仔优刘阔韩伟姜少玮韩灵生刘海波
Owner DALIAN UNIV OF TECH