Method for testing temperature rise of spindle of numerical control lathe
A technology of CNC lathes and testing methods, applied in mechanical bearing testing, thermometers giving average/integrated values, etc. The effect of high efficiency, improving work efficiency and improving assembly quality
Active Publication Date: 2010-05-19
NEWAY CNC EQUIP SUZHOU
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[0004] However, when testing according to the above-mentioned standards, since the time for the main shaft to run at low, medium and high speeds is relatively short, the relationship between the main shaft and the bearing has not reached sufficient stability before running to the highest speed, and the running time at the highest speed is longer, making the The temperature of the spindle bearing rises sharply at the highest speed, and it is easy to reach the limit temperature, which will cause damage to the bearing and further affect the assembly quality of the spindle components
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Embodiment 1
[0023] A method for testing the temperature rise of a CNC lathe spindle, comprising the steps of:
[0024] (1) According to the main parameters of the CNC lathe, set the initial speed of the spindle, the speed increase value of each level and the maximum speed;
[0025] (2) Measure the temperature of the spindle bearing in real time. At each level of speed, if the temperature rise exceeds 0.5°C in 10 minutes, control the spindle to continue running at this level of speed, otherwise the current speed will be raised to the next level of speed;
[0026] (3) Repeat step (2) until the spindle reaches the maximum speed. When running-in at the maximum speed, measure the temperature of the spindle bearing in real time. If the temperature rise exceeds 5°C in 1 hour, continue to run-in until the above-mentioned temperature rise standard is met. At this time, the temperature of the spindle bearing reaches saturation, the temperature rise of the spindle is qualified, and the test is termi...
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The invention discloses a method for testing temperature rise of a spindle of a numerical control lathe, which comprises the following steps: setting the initial speed, promoting value of the speed of each level and the maximum speed of the spindle according to a main parameter of the numerical control lathe; measuring the temperature of a spindle bearing in real time, if the temperature rise exceeds a set temperature T1 in unit time at the speed of each level, controlling the spindle to continue the running-in at the speed of the level, and otherwise promoting the current speed to the speed of next level; repeating the steps until the spindle is up to the maximum speed; when performing the running-in at the maximum speed, measuring the temperature of the spindle bearing in real time, if the temperature rise exceeds a set temperature T2 in unit time, continuing the running-in until the temperature rise accords with the temperature rise standard, then determining that the temperature rise of the spindle is qualified, and stopping testing; and if the temperature of the spindle bearing exceeds 70 DEG C or the temperature rise of the spindle bearing exceeds 35 DEG C / hour, determining that temperature rise of the spindle is below standard, and stopping the testing. The method can prevent the bearing from reaching an extreme temperature and being damaged, and the assembly quality of spindle components is improved effectively.
Description
technical field [0001] The invention belongs to the technical field of testing numerically controlled lathes, and in particular relates to a method for testing the temperature rise of the main shaft of numerically controlled lathes. Background technique [0002] At present, CNC lathes have been widely used in our country, laying a solid foundation for mechanized manufacturing and production in our country. Among them, the spindle is the core component of the CNC machine tool, so the requirements for the precision and rigidity of the spindle are very high. Generally speaking, the precision error and deformation of each part of the main shaft are very small, but when running at high speed, the bearing generates a lot of heat, which leads to a high temperature rise of the bearing and thermal deformation, and the error caused by thermal deformation is much larger than that of the bearing. Accuracy error and deformation, and thermal deformation directly changes the preload condi...
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Login to View More IPC IPC(8): G01K3/04G01M13/04
Inventor 管强赵敏
Owner NEWAY CNC EQUIP SUZHOU