Thermal displacement prevention device and thermal displacement prevention method for machine tool having ball screw
A technology of ball screw and thermal displacement, applied in the direction of feeding device, transmission device, automatic control device, etc., can solve the problems of reducing productivity, cost and time, and processing error, so as to improve productivity, save time and cost , Improve the effect of processing precision and productivity
Active Publication Date: 2015-06-17
DN SOLUTIONS CO LTD
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Problems solved by technology
However, in the case of such conventional technology, the bearing 21 that generates the most frictional heat is not directly cooled, but the ball screw 10 is indirectly cooled, and the bearing 21 is indirectly cooled according to the cooled ball screw, so in order to prevent Thermal deformation requires continuous forced injection of air, which requires a lot of cost and time
[0006] In addition, when the machine tool is operated while the machine tool is stopped, that is, the ball screw is cooled, the bearing is also kept cooled. Therefore, in order to prevent thermal displacement of the workpiece, the workpiece is not processed until the bearing reaches a certain temperature. Instead, the machine tool is preparatory to work and the machine tool is warmed up for a long time, thereby wasting power and reducing productivity.
[0007] Furthermore, machining errors occur due to thermal displacement during precision machining
Method used
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[0038] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, reference signs are assigned to constituent elements in each drawing, and the same symbols are attached to the same constituent elements.
[0039] figure 2 A conceptual diagram showing a thermal displacement prevention device for a machine tool including a ball screw according to a preferred embodiment of the present invention. image 3 It is a plan view showing installation positions of a heating unit and a temperature sensor in a thermal displacement preventing device for a machine tool equipped with a ball screw according to a preferred embodiment of the present invention. Figure 4 A detailed cross-sectional view showing a heating unit in a thermal displacement prevention device for a machine tool equipped with a ball screw according to a preferred embodiment of the present invention.
[0040] refer to Figure 2 to Figure 4 ...
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One object of the present invention is to prevent thermal displacement caused by the heat due to mechanical friction of a ball screw and bearing. The present invention relates to a thermal displacement prevention device for a machine tool having a ball screw and to a thermal displacement prevention method for a machine tool having a ball screw, wherein the thermal displacement prevention device includes: a bearing (22) disposed at the outer circumferential edge of a ball screw (10) in a machine tool having the ball screw (10); a bearing housing (21) which supports the bearing (22); a space part (50) formed on one upper side surface of the bearing housing (21); a heating unit (30) having an external shape which corresponds to the internal shape of the space part (50); a temperature sensor (40) disposed at a position facing the heating unit (30); and a control unit (70) which controls the ON / OFF of a power supply device (80) supplying power to the heating unit (30) according to the temperature measured by the temperature sensor (40).
Description
technical field [0001] The present invention relates to a thermal displacement preventing device and a thermal displacement preventing method of a machine tool equipped with a ball screw, and more particularly to a thermal displacement preventing device and a thermal displacement preventing method of a machine tool equipped with a ball screw as follows: The temperature sensor prevents thermal displacement, and the control unit controls on / off (on / off) of a power supply device that supplies power to the heating unit to prevent thermal displacement. Background technique [0002] Various types of machine tools including turning centers, machining centers, portal machining centers, EDM machines, horizontal NC boring machines, and NC lathes are widely used in various industrial sites according to the purpose of the work. [0003] like figure 1 As shown, in general, various types of machine tools use ball screws to convert rotary motion into linear motion. The ball screw 10 is c...
Claims
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Login to View More IPC IPC(8): B23Q5/40F16H25/20B23Q15/00
CPCB23Q5/40B23Q11/143F16H25/20B23Q15/00
Inventor 卢镇成
Owner DN SOLUTIONS CO LTD