Lubricating system of numerical control machine tool

Abstract

The utility model relates to the technical field of numerically-controlled machine tool lubrication, and discloses a numerically-controlled machine tool lubrication system which comprises a lead screw and a sliding shaft which are installed on a numerically-controlled machine tool, a moving block comprises a block body which is arranged on the lead screw in a threaded mode and provided with a guide groove opening and a sliding groove, and a first oil groove and a second oil groove are formed in the two sides of the block body correspondingly. The first oil groove is communicated with the guide groove opening, a detection ring is slidably arranged in the second oil groove, the second oil groove is slidably arranged on the sliding shaft in a sleeving mode, and a detection assembly is arranged on the side, away from the detection ring, of the second oil groove; through cooperative use of the moving block, the detection ring, the detection assembly, the oil inlet pipe and the oil outlet pipe, automatic oil supply and lubrication are achieved through balance of friction force and magnetic force, the temperature sensor monitors the oil temperature and keeps the oil temperature within a suitable range, the problem of excessive or insufficient lubrication is avoided, and the beneficial effects of oil supply as needed and excellent effect are achieved; and the intelligence and the efficiency of the lubricating system are improved.

Description

Technical Field

[0001] The present application relates to the technical field of lubrication of numerically controlled machine tools, and in particular to a lubrication system for numerically controlled machine tools. Background Art

[0002] The automatic lubrication system continuously supplies lubricating oil to the machine tool guides, lead screws, bearings and other mechanical parts to ensure the machining accuracy of CNC machine tools and extend the service life of machine tools. Therefore, the frequency and amount of lubricating oil supply directly affect the lubrication effect and oil consumption.

[0003] At present, most automatic lubrication systems of CNC machine tools realize program-controlled timed global lubrication by setting the oil supply time and interval time through key programs (or PLC control programs). However, in many cases, CNC machine tools are idle when turned on. As long as the set time interval is reached, the program-controlled timed global lubrication system will still supply oil. In the actual processing of CNC machine tools, the operation conditions of each axis are different, and even some axes do not move. As long as the set time interval is reached, the lubrication system will still supply oil, which causes waste of lubricating oil and environmental pollution, and fails to achieve the defect of lubrication effect.

[0004] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0005] In order to solve the problem in the lubrication system of CNC machine tools that the fixed interval refueling method leads to uneven lubrication of the screw rod, affects the processing accuracy and causes waste of lubricating oil, the present application provides a lubrication system for CNC machine tools.

[0006] The present application provides a CNC machine tool lubrication system that adopts the following technical solution:

[0007] A lubrication system for a numerically controlled machine tool comprises a moving block, a lead screw, a sliding shaft, a detection ring and a detection assembly;

[0008] Wherein, the moving block comprises a block body, the block body is threadedly sleeved on a screw rod, and the screw rod is used to drive the block body to move, thereby realizing the axis movement of the machine tool;

[0009] The sliding shaft passes through the block and is movably connected to the block, and is used to guide the block;

[0010] The detection ring is slidably arranged on both sides of the block on the sliding shaft, and is used to supply lubricating oil to the block after the relative friction between the sliding shaft and the detection ring reaches a threshold value;

[0011] The detection component is arranged on a side of the block away from the detection ring, and the detection component includes a distance sensor and a temperature sensor.

[0012] The distance measuring sensor is used to detect the relative position of the detection ring, and then determine whether the relative friction between the sliding shaft and the detection ring reaches the threshold;

[0013] The temperature sensor is used to detect the oil temperature threshold of the lubricating oil and determine whether the lubricating oil needs to be supplied to the block.

[0014] Preferably, the block is provided with a guide groove opening adapted to the screw rod, first oil grooves are provided on both sides of the block, the first oil grooves are connected to the guide groove opening, a sliding groove adapted to the sliding shaft is provided on the block, second oil grooves are provided on both sides of the block, the second oil grooves are connected to the sliding groove, and the first oil grooves are connected to the second oil grooves.

[0015] Preferably, a second rubber plug is provided on one side of the two first oil grooves away from the guide groove opening to seal the first oil groove, and a first rubber plug is provided on one side of the two second oil grooves away from the slide groove.

[0016] Preferably, the two distance measuring sensors are respectively arranged on the corresponding rubber plugs 1, the temperature sensor is arranged on one of the rubber plugs 1, and magnetic rings are arranged on the sides of the two rubber plugs 1 close to each other, and the detection ring and the magnetic ring have the same magnetic poles on the sides close to each other.

[0017] Preferably, an oil inlet pipe is provided at the upper end of the block, an oil passage is provided at the lower side of the oil inlet pipe on the block, the oil passage is respectively connected with the guide groove mouth and the slide groove, an oil outlet pipe is provided at the bottom of the block, an oil outlet passage is connected between the two first oil grooves, and the oil outlet passage is connected with the oil outlet pipe.

[0018] Preferably, the oil inlet pipe and the oil outlet pipe are respectively connected to the oil supply pipe and the oil return pipe of the lubrication system of the CNC machine tool.

[0019] In summary, this application includes the following beneficial technical effects:

[0020] Through the coordinated use of a moving block, a detection ring, a detection assembly, an oil inlet pipe and an oil outlet pipe, and by utilizing the magnetic force between a magnetic ring fixed on the moving block and a detection ring slidingly sleeved on the sliding shaft, when the friction force is greater than the magnetic force, the detection ring does not move on the sliding shaft when the moving block moves, and the temperature sensor detects that the relative position reaches a threshold value. At this time, the lubrication system supplies oil to lubricate the block. When the friction force is less than the magnetic force, the magnetic force of the magnetic ring pushes the detection ring to move along the sliding shaft, and it automatically resets, and the lubrication system stops supplying oil. At the same time, the temperature sensor can be used to detect the temperature of the lubricating oil, and the oil temperature is kept at a certain threshold, so that the problems of over-lubrication and insufficient lubrication can be avoided. Compared with the existing technology, the method has the advantages of supplying oil on demand and having a good lubrication effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1is a schematic diagram of a three-dimensional structure from a first-view perspective of an embodiment of the application;

[0022] Figure 2 is a schematic diagram of a second perspective stereoscopic structure of an embodiment of the application;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure from a third perspective of an embodiment of the application.

[0024] Explanation of the reference numerals: 1. Moving block; 101. Block body; 102. First oil groove; 103. Second oil groove; 104. Oil passage; 105. Oil outlet; 2. Screw rod; 3. Sliding shaft; 4. Detection ring; 5. Detection assembly; 501. Distance measuring sensor; 502. Temperature sensor; 503. Magnetic ring; 6. Rubber plug one; 7. Rubber plug two; 8. Oil inlet pipe; 9. Oil outlet pipe. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-3 This application is described in further detail.

[0026] The present application embodiment discloses a lubrication system for a CNC machine tool. Figure 1-3 A lubrication system for a numerically controlled machine tool comprises a screw rod 2 and a sliding shaft 3 installed on the numerically controlled machine tool, and is used to drive a moving block 1 to move along an axial direction. The moving block 1 is installed on the screw rod 2, and the moving block 1 comprises a block body 101 which is threadedly installed on the screw rod 2 and has a guide groove and a slide groove. The slide shaft 3 is located in the slide groove and is slidably connected with the slide groove. The block body 101 is guided to move by the slide shaft 3. The guide groove is threadedly connected with the screw rod 2. A first oil groove 102 and a second oil groove 103 are provided on both sides of the block body 101. The first oil groove 102 is connected to the guide groove, and the second oil groove 103 is connected to the slide groove. The first oil groove 102 and the second oil groove 103 are connected to each other. A detection ring 4 is slidably installed in the second oil groove 103, and the sliding sleeve is arranged on the sliding shaft 3. A detection component 5 is installed on the side of the second oil groove 103 away from the detection ring 4. The detection component 5 includes a distance sensor 501 and a temperature sensor 502, wherein the distance sensor 501 is used to detect the relative position of the detection ring 4, and then determine whether the relative friction between the sliding shaft 3 and the detection ring 4 reaches a threshold value, and the temperature sensor 502 is used to detect the oil temperature threshold value of the lubricating oil, and determine whether the lubricating oil needs to be supplied to the block 101;

[0027] By adopting the above technical solution, through the magnetic force between the magnetic ring 503 fixed on the moving block 1 and the detection ring 4 slidably mounted on the sliding shaft 3, when the friction force is greater than the magnetic force, when the moving block 1 moves, the detection ring 4 does not move on the sliding shaft 3, and the temperature sensor 502 detects that the relative position reaches the threshold value. At this time, the lubrication system supplies oil to lubricate the block 101. When the friction force is less than the magnetic force, the magnetic force of the magnetic ring 503 pushes the detection ring 4 to move along the sliding shaft 3, and it automatically resets, and the lubrication system stops supplying oil. At the same time, the temperature sensor 502 can be used to detect the temperature of the lubricating oil, and the oil temperature is kept at a certain threshold, which can avoid the problems of over-lubrication and insufficient lubrication.

[0028] Reference Figure 1 , a rubber plug 2 7 is installed on the side away from the guide groove opening of the two first oil grooves 102, which is used to seal the first oil groove 102, and a rubber plug 6 is installed on the side away from the slide groove of the two second oil grooves 103, and the distance measuring sensor 501 is installed on the corresponding rubber plug 6, and the temperature sensor 502 is installed on one of the rubber plugs 6. A magnetic ring 503 is installed on the side of the two rubber plugs 6 close to each other, and the magnetic poles of the detection ring 4 and the side of the magnetic ring 503 close to each other are the same;

[0029] By adopting the above technical solution, when the lubricating oil on the surface of the screw rod 2 and the sliding shaft 3 is normally lubricated, the moving block 1 moves along the screw rod 2 and the sliding shaft 3. Due to the lubricating effect of the lubricating oil on the surface of the sliding shaft 3, the friction of the sliding shaft 3 relative to the detection ring 4 is not enough to overcome the magnetic effect of the magnetic ring 503 on the detection ring 4, and the distance between the detection ring 4 and the distance measuring sensor 501 does not reach the set threshold. As the moving time of the moving block 1 along the screw rod 2 and the sliding shaft 3 increases, the lubricating oil in the contact parts between the screw rod 2 and the moving block 1, and the sliding shaft 3 and the moving block 1 is lost, and the sliding friction between the sliding shaft 3 and the detection ring 4 gradually increases until the friction between the sliding shaft 3 and the detection ring 4 overcomes the magnetic ring 5 03 acts on the magnetic force of the detection ring 4. During the movement of the moving block 1, the distance between the detection ring 4 and the distance measuring sensor 501 reaches the set threshold, and the lubrication system of the CNC machine tool starts to lubricate the contact parts between the screw rod 2 and the moving block 1, and the sliding shaft 3 and the moving block 1. At this time, the friction value of the sliding shaft 3 on the detection ring 4 is a pre-set value, and there is no need to install the oil filling time in advance to add lubricating oil. Therefore, according to the working frequency of one of the axes of the CNC machine tool, that is, the consumption rate of the lubricating oil on the axis, automatic oiling and lubrication can be carried out in time, thereby ensuring that the overall processing of the CNC machine tool is less affected by friction resistance, thereby improving the processing accuracy of the CNC machine tool.

[0030] Reference Figure 2-3The upper end of the block 101 is provided with an oil inlet pipe 8, and an oil passage 104 is provided on the lower side of the oil inlet pipe 8 on the block 101, and is communicated with the oil inlet pipe 8, and the oil passage 104 is communicated with the guide groove opening and the slide groove respectively, and an oil outlet pipe 9 is provided at the bottom of the block 101, and an oil outlet passage 105 is communicated between the two first oil grooves 102, and the oil outlet passage 105 is communicated with the oil outlet pipe 9, and the oil inlet pipe 8 and the oil outlet pipe 9 are respectively communicated with the oil supply pipe and the oil return pipe of the lubrication system of the CNC machine tool;

[0031] By adopting the above technical solution, the lubricating oil enters the oil passage 104 through the oil inlet pipe 8, acts on the contact parts between the screw rod 2 and the block 101, and the sliding shaft 3 and 01, so as to achieve comprehensive lubrication, and the oil is discharged through the oil outlet passage 105 and the oil outlet pipe 9.

[0032] The implementation principle of a lubrication system for a numerically controlled machine tool in an embodiment of the present application is as follows: when the lubricating oil on the surface of the screw rod 2 and the sliding shaft 3 is normally lubricated, the block 101 moves along the screw rod 2 and the sliding shaft 3. Due to the lubricating effect of the lubricating oil on the surface of the sliding shaft 3, the friction force of the sliding shaft 3 relative to the detection ring 4 is not enough to overcome the magnetic effect of the magnetic ring 503 on the detection ring 4. The magnetic ring 503 pushes the detection ring 4 to move, and the distance between the detection ring 4 and the distance measuring sensor 501 does not reach the set threshold. As the moving block 1 moves along the screw rod 2 and the sliding shaft 3 for an increasing time, the lubricating oil at the contact parts between the screw rod 2 and the moving block 1, and the sliding shaft 3 and the moving block 1 is lost, and the sliding friction force between the sliding shaft 3 and the detection ring 4 gradually increases until the friction force of the sliding shaft 3 on the detection ring 4 overcomes the magnetic ring 503. Due to the magnetic effect of ring 503 on the detection ring 4, during the movement of the moving block 1, the detection ring 4 does not move along the sliding shaft 3, so that the distance between the detection ring 4 and the distance measuring sensor 501 reaches the set threshold, and the lubrication system of the CNC machine tool is in operation. The contact parts between the screw rod 2 and the moving block 1, and the sliding shaft 3 and the moving block 1 are lubricated with oil through the oil supply pipeline. At this time, the friction value of the sliding shaft 3 on the detection ring 4 is a pre-set value, and there is no need to install the oil filling time in advance to add lubricating oil. Therefore, according to the working frequency of one of the axes of the CNC machine tool, that is, the consumption rate of the lubricating oil on the axis, automatic oiling and lubrication can be carried out in time, thereby ensuring that the overall processing of the CNC machine tool is less affected by friction resistance, thereby improving the processing accuracy of the CNC machine tool.

[0033] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0034] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0035] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

[0036] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A lubrication system for a numerically controlled machine tool, comprising a moving block (1), a screw rod (2), a sliding shaft (3), a detection ring (4) and a detection assembly (5); in, The moving block (1) comprises a block body (101), wherein the block body (101) is threadedly sleeved on a screw rod (2), and the screw rod (2) is used to drive the block body (101) to move, thereby realizing the axial movement of the machine tool; The sliding shaft (3) passes through the block (101) and is movably connected to the block (101) to guide the block (101); The detection ring (4) is slidably arranged on both sides of the block (101) on the sliding shaft (3) and is used to supply lubricating oil to the block (101) after the relative friction between the sliding shaft (3) and the detection ring (4) reaches a threshold value; The detection component (5) is arranged on a side of the block (101) away from the detection ring (4), and the detection component (5) comprises a distance sensor (501) and a temperature sensor (502). The distance measuring sensor (501) is used to detect the relative position of the detection ring (4), and then determine whether the relative friction between the sliding shaft (3) and the detection ring (4) reaches a threshold value; The temperature sensor (502) is used to detect the oil temperature threshold of the lubricating oil and determine whether the lubricating oil needs to be supplied to the block (101).

2. A lubrication system for a CNC machine tool according to claim 1, characterized in that: The block (101) is provided with a guide groove opening adapted to the screw rod (2), both sides of the block (101) are provided with a first oil groove (102), the first oil groove (102) is communicated with the guide groove opening, the block (101) is provided with a slide groove adapted to the slide shaft (3), both sides of the block (101) are provided with a second oil groove (103), the second oil groove (103) is communicated with the slide groove, and the first oil groove (102) is communicated with the second oil groove (103).

3. A lubrication system for a CNC machine tool according to claim 2, characterized in that: A second rubber plug (7) is provided on the side of the two first oil grooves (102) away from the guide groove opening for sealing the first oil groove (102), and a first rubber plug (6) is provided on the side of the two second oil grooves (103) away from the slide groove.

4. A lubrication system for a CNC machine tool according to claim 3, characterized in that: The two distance measuring sensors (501) are respectively arranged on the corresponding rubber plugs (6), the temperature sensor (502) is arranged on one of the rubber plugs (6), a magnetic ring (503) is arranged on the side of the two rubber plugs (6) close to each other, and the detection ring (4) and the magnetic ring (503) have the same magnetic pole on the side close to each other.

5. A lubrication system for a CNC machine tool according to claim 2, characterized in that: An oil inlet pipe (8) is arranged at the upper end of the block (101), and an oil passage (104) is arranged on the lower side of the oil inlet pipe (8) on the block (101), and the oil passage (104) is respectively connected to the guide groove opening and the slide groove; an oil outlet pipe (9) is arranged at the bottom of the block (101), and an oil outlet passage (105) is arranged between the two first oil grooves (102), and the oil outlet passage (105) is connected to the oil outlet pipe (9).

6. A lubrication system for a CNC machine tool according to claim 5, characterized in that: The oil inlet pipe (8) and the oil outlet pipe (9) are respectively connected to the oil supply pipe and the oil return pipe of the lubrication system of the numerical control machine tool.

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