CN-115697627-B - Machine tool system

Abstract

Provided is a machine tool system capable of supplying an appropriate amount of lubricating oil to a machine tool according to an operation. The machine tool system includes a lubricant supply unit that supplies lubricant to a feed shaft of a machine tool, a code analysis unit that analyzes a machining program and determines whether or not a specific reciprocation is performed on the feed shaft, and a control unit that changes, when the machine tool performs the specific reciprocation, the supply of the lubricant by the lubricant supply unit to a dedicated mode when the specific reciprocation is determined.

Inventors

• NISHIMURA TAKUMA

Assignees

• 发那科株式会社

Dates

Publication Date

20260505

Application Date

20210525

Priority Date

20200529

Claims (5)

1. 1. A machine tool system is provided with: A lubricant supply unit that supplies lubricant to a feed shaft of a machine tool; A code analysis part for analyzing the processing program and judging whether to perform specific reciprocating motion on the feeding shaft, and A control unit that, when it is determined that the specific reciprocating operation is performed, changes the supply of the lubricating oil by the lubricating oil supply unit to a dedicated mode when the specific reciprocating operation is performed by the machine tool, Wherein the feed shaft includes a ball screw, and the code analysis unit determines that the specific reciprocation is performed on the feed shaft when both a first movement distance from a first reversing position to a second reversing position and a second movement distance from the second reversing position to a command position of the ball screw are within a specific distance in the machining program.
2. 2. The machine tool system of claim 1, wherein, When it is determined that the specific reciprocating operation is not performed, the control unit changes the supply of the lubricating oil by the lubricating oil supply unit to a normal mode when the machine tool performs a normal operation.
3. 3. The machine tool system according to claim 2, wherein, The normal mode and the dedicated mode each include a discharge interval and a discharge period of the lubricating oil, The discharge interval and the discharge period in the dedicated mode are shorter than the discharge interval and the discharge period in the normal mode, respectively.
4. 4. The machine tool system according to claim 1 to 3, wherein, The feed shaft includes a ball screw, and the specific reciprocation includes reciprocation performed within a distance within a lead width of the ball screw.
5. 5. The machine tool system according to claim 1 to 3, wherein, The machine tool further includes a display control unit that causes a display unit to display notification information indicating that the specific reciprocation is performed when the specific reciprocation is performed by the machine tool.

Description

Machine tool system Technical Field The present invention relates to a machine tool system. Background Conventionally, a machine tool using a ball screw and a linear guide for a feed shaft has a lubrication device for supplying lubrication oil to the ball screw and the linear guide. The lubrication device operates at regular intervals during the operation of the machine tool (for example, refer to patent document 1). In the method described in patent document 1, when the machine tool is operated, a time for which the table reciprocates on the guide surface of the support is accumulated, and when the accumulated time becomes time T0, a certain amount V0 of lubricating oil is supplied to the guide surface for a certain time T0. Prior art literature Patent literature Patent document 1 Japanese patent laid-open No. 2001-334442 Disclosure of Invention Problems to be solved by the invention In such a machine tool, if the discharge interval of the lubricating oil is too long, the lubricating oil is insufficient, and the ball screw is worn. On the other hand, if the discharge interval of the lubricating oil is too short, the consumption of the lubricating oil increases. Particularly, in the case of a rocking motion performed by the ball screw, the contact points of the balls are intensively contacted. Therefore, it is difficult to form an oil film by the lubricating oil, fretting occurs, and the ball screw is easily worn. If the ball screw is worn, there occurs a problem such as a decrease in machining accuracy of the machine tool. However, if the discharge interval of the lubricating oil is simply extended, there is a problem that the consumption of the lubricating oil increases. Accordingly, it is desirable to supply an appropriate amount of lubricating oil to the machine tool according to the operation. Solution for solving the problem The machine tool system according to the present disclosure includes a lubricant supply unit that supplies lubricant to a feed shaft of a machine tool, a code analysis unit that analyzes a machining program and determines whether or not a specific reciprocation is performed on the feed shaft, and a control unit that changes, when the machine tool performs the specific reciprocation, the supply of the lubricant by the lubricant supply unit to a dedicated mode when the specific reciprocation is determined to be performed. ADVANTAGEOUS EFFECTS OF INVENTION According to the present invention, an appropriate amount of lubricating oil can be supplied to a machine tool according to the operation. Drawings Fig. 1 is a diagram showing an outline of a machine tool system according to the present embodiment. Fig. 2 is a diagram illustrating an operation of the lubricant supply unit. Fig. 3 is a diagram illustrating a specific reciprocation of the ball screw. Fig. 4 is a flowchart showing a process of the machine tool system. Detailed Description An example of the embodiment of the present invention will be described below. Fig. 1 is a diagram showing an outline of a machine tool system 1 according to the present embodiment. The machine tool system 1 includes a numerical controller 10 and a machine tool 20. The numerical controller 10 is a device for controlling the machine tool 20 to perform predetermined machining or the like on the machine tool 20. The numerical controller 10 includes a code analysis unit 11, a buffer memory 12, a control unit 13, a display control unit 14, and a display unit 15. The machine tool 20 is a device that performs predetermined machining such as cutting and the like based on the control of the numerical controller 10. The machine tool 20 includes a servo amplifier 21, a servo motor 22, a ball screw 23, a linear guide 24, a PLC (Programmable Logic Controller: programmable logic controller) 25, and a lubricant supply unit 26. The code analysis unit 11 analyzes the code of the machining program P, and determines whether or not a specific reciprocation is performed on the ball screw 23 and the linear guide 24 as the feed shafts. The buffer memory 12 is constituted by, for example, a volatile memory or the like, stores data supplied from the code analysis unit 11, and transmits the data to the control unit 13 at an appropriate timing. The control unit 13 controls the supply of the lubricating oil by the lubricating oil supply unit 26 based on the machining program P. Specifically, when the code analysis unit 11 determines that the specific reciprocating operation is performed, the control unit 13 changes the supply of the lubricating oil by the lubricating oil supply unit 26 to the dedicated mode when the machine tool 20 performs the specific reciprocating operation. Further, details of the control performed by the control section 13 will be described later. The display control unit 14 causes the display unit 15 to display predetermined information according to the control of the control unit 13. Specifically, when the machine tool 20 performs a specific reciprocatin