Machine tool spindle air curtain air cut-off detection system and machine tool

Abstract

The utility model relates to the field of machine tool air path detection, in particular to a machine tool spindle air curtain air-break detection system and a machine tool, which comprise an on-off switch, an air pressure detection component and an air pressure detection component, after the air pressure detection component used for detecting the on-off switch is arranged on the on-off switch, air flow sequentially passes through the on-off switch and the air pressure detection component, and the on-off switch is connected with the air pressure detection component. When the on-off switch breaks down, the air pressure detection component can detect that the on-off switch breaks down, so that the on-off switch which breaks down can be correspondingly processed.

Description

Technical Field

[0001] The utility model relates to the field of machine tool gas path detection, in particular to a system for detecting gas failure of a machine tool spindle air curtain and a machine tool. Background Art

[0002] In the prior art, a solenoid valve 200 and a spindle interface 400 are provided on the spindle gas circuit 300. The solenoid valve 200 is used to control the on-off of the spindle gas circuit 300. The spindle interface 400 is used to connect an external spindle. An air pressure detection device 100 for detecting the air pressure of the spindle gas circuit 300 is provided in front of the solenoid valve 200. The air flow first passes through the air pressure detection device 100 and then passes through the solenoid valve 200. This makes it impossible for the air pressure detection device 100 to detect the solenoid valve 200 when the solenoid valve 200 on the spindle gas circuit 300 is damaged, for example, the solenoid valve 200 is cut off from air. However, when the solenoid valve 200 is cut off from air, if the spindle still works normally, and the spindle has no airtight protection at this time, external cutting fluid, dust, water vapor, iron filings, oil mist and other dirt can easily enter the spindle, which will reduce the service life of the spindle. Long-term operation may even cause damage to the spindle. For reference, Figure 1 .

[0003] After the solenoid valve 200 is cut off from air, the air pressure detection device 100 cannot effectively detect the solenoid valve 200. After the solenoid valve 200 is damaged, the spindle has no airtight protection and continuing to work may cause damage to the spindle. Therefore, the prior art still has deficiencies and needs to be improved. Utility Model Content

[0004] To solve the above problems, the purpose of the utility model is to provide a system and machine tool for detecting air curtain air failure of a machine tool spindle, by arranging an air pressure detection component on the main air path and before the on-off switch to detect whether the on-off switch is on.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] The utility model provides a system for detecting air curtain failure of a machine tool spindle, comprising: a main air circuit and a spindle air curtain air circuit connected with the main air circuit;

[0007] The main gas circuit includes an on-off switch for opening / closing the main gas circuit and an air pressure detection component for detecting the air pressure of the main gas circuit. The main gas circuit is provided with an air source inlet, and the air source inlet, the on-off switch and the air pressure detection component are arranged in sequence;

[0008] The connection point between the spindle air curtain air path and the main air path is located at one end of the air pressure detection component away from the air source inlet, and the spindle air curtain air path is provided with an air source outlet for connecting with the spindle.

[0009] In one embodiment, the main gas circuit further includes a water separator and a main circuit pressure reducing valve which are connected in sequence, one end of the water separator is connected to the on-off switch, and the other end of the water separator is connected to the gas source inlet;

[0010] One end of the main pressure reducing valve is connected to the side of the on-off switch away from the air source inlet, and the other end of the main pressure reducing valve is connected to the spindle air curtain air path. The air pressure detection component is arranged on the main pressure reducing valve.

[0011] In one embodiment, the main gas circuit further includes a filter, one end of the filter is connected to a side of the main circuit pressure reducing valve away from the gas source inlet, and the other end of the filter is connected to the main shaft air curtain gas circuit.

[0012] In one embodiment, the system also includes a diverter valve, which includes a diverter inlet and at least two diverter outlets, wherein the diverter inlet is connected to the side of the filter away from the air source inlet, one diverter outlet is connected to the side of the spindle air curtain air path away from the air source outlet, and the remaining diverter outlets are used to connect to external pneumatic components.

[0013] In one embodiment, the spindle air curtain air circuit also includes a spindle air curtain pressure reducing valve and a speed regulating valve connected to the spindle air curtain pressure reducing valve. The side of the spindle air curtain pressure reducing valve away from the speed regulating valve is connected to the diverter valve, and the air source outlet is arranged on the speed regulating valve.

[0014] In one embodiment, the on-off switch is connected to the water separator through a first partition, and the on-off switch is connected to the main pressure reducing valve through a second partition.

[0015] In one embodiment, the main pressure reducing valve is connected to the filter via a third partition plate.

[0016] In one embodiment, the main pressure reducing valve is a filter pressure reducing valve.

[0017] In one embodiment, the on-off switch is a direct-acting two-way solenoid valve.

[0018] In one embodiment, the diverter valve is a T-type three-way valve.

[0019] In one embodiment, the system further comprises an alarm module, which is electrically connected to the air pressure detection component and is configured to generate an alarm according to a signal from the air pressure detection component.

[0020] A machine tool comprises a machine tool body and any one of the above-mentioned systems for detecting air curtain failure of the machine tool spindle. The system for detecting air curtain failure of the machine tool spindle is arranged on the machine tool body, and the air source outlet is connected to the spindle of the machine tool body.

[0021] The beneficial effect of the utility model is that the air pressure detection component for detecting the on-off switch is arranged after the on-off switch, and the air flow passes through the on-off switch and the air pressure detection component in sequence. When the on-off switch fails, the air pressure detection component can detect that the on-off switch has failed, so that corresponding processing can be performed on the failed on-off switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0023] Figure 1 It is a structural schematic diagram of the prior art;

[0024] Figure 2 The utility model is a structural schematic diagram of a system for detecting air curtain air failure of a machine tool spindle.

[0025] The reference numerals are: 100 - air pressure detection device, 200 - solenoid valve, 300 - spindle air circuit, 400 - spindle interface;

[0026] 1-air source inlet, 2-water separator, 3-first partition, 4-on-off switch, 5-second partition, 6-main line pressure reducing valve, 7-air pressure detection component, 8-third partition, 9-filter, 10-second elbow, 11-diverter valve, 12-third elbow, 13-spindle air curtain pressure reducing valve, 14-speed regulating valve, 15-air source outlet. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0028] refer to Figure 2, a system for detecting the air curtain disconnection of a machine tool spindle in an embodiment of the utility model comprises: a main air circuit and a spindle air curtain air circuit connected to the main air circuit, the main air circuit comprises an on-off switch 4 and an air pressure detection component 7, the on-off switch 4 is used to control the disconnection or conduction of the air circuit, and the air pressure detection component 7 is used to detect the air pressure of the main air circuit. An air source inlet 1 is provided on the main air circuit, and the air source inlet 1 is used to connect to an external air source, and the air source inlet 1, the on-off switch 4 and the air pressure detection component 7 are arranged in sequence. The connection point between the spindle air curtain air circuit and the main air circuit is located at the end of the air pressure detection component 7 away from the air source inlet 1, and the spindle air curtain air circuit comprises a spindle air curtain pressure reducing valve 13, and the spindle air curtain pressure reducing valve 13 is provided with an air source outlet 15, and the air source outlet 15 is used to communicate with the spindle. When the system is running, the air flow enters the main air circuit from the air source inlet 1, and is transported to the spindle from the air source outlet 15 through the spindle air curtain air circuit.

[0029] When the system is running, the air pressure detection component 7 always detects the air pressure passing through it. When the on-off switch 4 fails and cannot open the air circuit, the air pressure passing through the air pressure detection component 7 will be low. After the air pressure detection component 7 detects the decrease in air pressure, it will issue an alarm signal. At this time, the machine tool operator can obtain information about the machine tool abnormality and repair the air circuit to prevent the machine tool from continuing to work after the spindle air curtain air circuit is interrupted, thereby causing more valuable spindle damage.

[0030] The spindle air curtain is commonly known as the spindle air seal, which can prevent external cutting fluid, dust, water vapor, iron filings, oil mist and other dirt from entering the spindle bearings, thereby preventing damage to the spindle bearings, thereby ensuring the accuracy of the spindle and extending the service life of the spindle.

[0031] In one embodiment, reference Figure 2 The main gas circuit also includes a water separator 2 and a main pressure reducing valve 6 which are connected in sequence. One end of the water separator 2 is connected to the on-off switch 4, and the other end of the water separator 2 is connected to the gas source inlet 1, which is arranged at the first elbow joint. One end of the main pressure reducing valve 6 is connected to the side of the on-off switch 4 away from the gas source inlet 1, and the other end of the main pressure reducing valve 6 is connected to the main shaft air curtain gas circuit. The air pressure detection component 7 is arranged on the main pressure reducing valve 6. The water separator 2 is mainly used for water vapor separation (mainly for water vapor), and the main pressure reducing valve 6 is mainly used for main gas circuit pressure regulation and monitoring.

[0032] In one embodiment, reference Figure 2 The main gas circuit also includes a filter 9, one end of the filter 9 is connected to the side of the main pressure reducing valve 6 away from the gas source inlet 1, and the other end of the filter 9 is connected to the main shaft air curtain gas circuit.

[0033] Specifically, after the airflow passes through multiple filtrations of the water separator 2, the main line pressure reducing valve 6 with the air pressure detection component 7 (mainly for pressure regulation and monitoring of the main air line, primary filtration of water vapor and oil mist), and the filter 9 (for secondary filtration of water vapor and oil mist), a dry and clean airflow is obtained for use by the pneumatic components of the main shaft air curtain air line and each branch.

[0034] In one embodiment, reference Figure 2 The system further includes a diverter valve 11, which includes a diverter inlet and at least two diverter outlets. The diverter inlet is used to communicate with the main air circuit, specifically, the diverter inlet is connected to the side of the filter 9 away from the air source inlet 1. One diverter port on the diverter valve 11 is connected to the side of the spindle air curtain air circuit away from the air source outlet 15, and is used for air flow to the spindle; the other diverter ports on the diverter valve 11 are used to connect to external pneumatic components, which are other components on the machine tool that need to be driven by air pressure.

[0035] In one embodiment, reference Figure 2 The spindle air curtain gas circuit also includes a spindle air curtain pressure reducing valve 13 and a speed regulating valve 14 connected to the spindle air curtain pressure reducing valve 13. The side of the spindle air curtain pressure reducing valve 13 away from the speed regulating valve 14 is connected to the diverter valve 11, and the air source outlet 15 is arranged on the speed regulating valve 14. Further, the system also includes a second elbow joint 10 connected to the filter 9. The side of the second elbow joint 10 away from the filter 9 is connected to the diverter inlet of the diverter valve 11, and the air source outlet 15 is arranged on the speed regulating valve 14. Since excessive air pressure and flow rate will cause the lubricating grease of the spindle bearing to be blown away, which will reduce the service life of the spindle, the spindle air curtain gas circuit needs to add the spindle air curtain pressure reducing valve 13 and the speed regulating valve 14 for pressure and speed regulation.

[0036] In one embodiment, reference Figure 2 The on-off switch 4 is connected to the water separator 2 through the first partition 3, the on-off switch 4 is connected to the main pressure reducing valve 6 through the second partition 5; the main pressure reducing valve 6 is connected to the filter 9 through the third partition 8. The first partition 3, the second partition 5 and the third partition 8 are all partitions with brackets.

[0037] In one embodiment, reference Figure 2 The main pressure reducing valve 6 is a filter pressure reducing valve, the on-off switch 4 is a direct-acting two-way solenoid valve, and the diverter valve 11 is a T-type three-way valve.

[0038] Specifically, the water separator 2 is connected to the direct-acting two-way solenoid valve by a bracket partition, and a sealing ring is installed between the water separator 2 and the direct-acting two-way solenoid valve to achieve sealed communication between the two. The direct-acting two-way solenoid valve and the filter pressure reducing valve are connected to the bracket partition and are connected to the direct-acting two-way solenoid valve by a bracket partition, and a sealing ring is installed between the direct-acting two-way solenoid valve and the filter pressure reducing valve to achieve sealed communication between the two. The air pressure detection component is fastened to the main pressure reducing valve 6 by threads. The main pressure reducing valve 6 and the filter 9 are connected to the bracket partition, and a sealing ring is installed between the main pressure reducing valve 6 and the filter 9 to achieve sealed communication between the two.

[0039] The first elbow joint is arranged at the air source inlet 1, and is fastened and connected with the air inlet end of the water separator 2 by means of threads. The second elbow joint 10 is fastened and connected with the air outlet end of the filter 9 by means of threads. The third elbow joint 12 is fastened and connected with the air inlet end of the spindle air curtain pressure reducing valve 13 by means of threads. The air outlet end of the spindle air curtain pressure reducing valve 13 is fastened and connected with the speed regulating valve 14 by means of threads, and the air source outlet 15 is connected with the speed regulating valve 14.

[0040] Through the above connection structure: the main gas circuit is: gas source inlet 1-first elbow joint-water separator 2-direct-acting two-way solenoid valve-filter pressure reducing valve (with air pressure detection component 7 installed)-filter 9-second elbow joint 10. The main shaft air curtain gas circuit is: T-shaped three-way valve (for diversion)-third elbow joint 12-spindle air curtain pressure reducing valve 13-speed regulating valve 14.

[0041] Furthermore, the system also includes an alarm module for alarming, the alarm module is electrically connected to the air pressure detection component, and the alarm module is used to alarm according to the signal of the air pressure detection component. When the air pressure is detected to be too low, the alarm module will sound an alarm. The alarm mode includes an indicator light or a voice control indication.

[0042] In another embodiment, a machine tool includes a machine tool body and any one of the above-mentioned systems for detecting air curtain air failure of the machine tool spindle, wherein the system for detecting air curtain air failure of the machine tool spindle is arranged on the machine tool body, and the air source outlet 15 is connected to the spindle of the machine tool body.

[0043] By setting up a system for detecting air curtain failure of the machine tool spindle on the machine tool, the system provides airtight protection for the machine tool. When the system is ventilated, gas flows out of the air source outlet to prevent debris from entering the air source outlet, thereby ensuring that the connection between the air source outlet and the spindle is not affected by debris.

[0044] When the air source outlet 15 does not deliver air and the spindle is still rotating, debris may enter the spindle or the air source outlet 15, affecting the spindle. The air pressure detection component 7 on the system of the utility model detects the air pressure of the main air path in real time. When it is detected that the air pressure is too low, the main air path can be closed through the on-off switch 4 to prevent the spindle from still rotating when the air source outlet 15 does not deliver air.

[0045] The utility model controls the on and off of the main air circuit and the spindle air curtain air circuit by switching the direct-acting two-way solenoid valve. When the direct-acting two-way solenoid valve fails or is damaged and cannot open the air circuit, the air pressure detection component 7 behind it will send out an alarm signal of too low air pressure. At this time, the machine tool operator can obtain the abnormal information of the machine tool and inspect the air circuit. It is prevented that the machine tool continues to work after the spindle air curtain air circuit is interrupted, thereby causing more expensive spindle damage.

[0046] The utility model at least has the following beneficial effects:

[0047] 1. Added the function of detecting the air interruption of the air curtain of the spindle: the on-off switch 4 (direct-acting two-way solenoid valve) is installed in front of the filter pressure reducing valve (with pressure detection component 7). So that the on-off switch 4 can control the on-off of the air curtain of the spindle, and when it fails or is damaged and cannot open the air circuit, the air pressure detection component 7 behind it can send out an alarm signal of low air pressure, so that the machine tool operator can obtain the abnormal information of the machine tool and repair the air circuit, so as to avoid the machine tool continuing to work after the air curtain of the spindle is interrupted, thereby causing more expensive spindle damage.

[0048] 2. Prolong the service life of the direct-acting two-way solenoid valve: Install the direct-acting two-way solenoid valve behind the water separator 2. The airflow passes through the water separator 2, so that the air passing through the direct-acting two-way solenoid valve is dry and relatively clean, which can achieve the purpose of prolonging the service life of the direct-acting two-way solenoid valve.

[0049] 3. Improve the modularization and integration of machine tool pneumatic components: In the prior art, the spindle air curtain solenoid valve used to control the on-off of the system air circuit is installed separately in the spindle air curtain air circuit. The utility model integrates the on-off switch 4 used to control the on-off of the system air circuit and the machine tool pneumatic triple (water separator 2, filter pressure reducing valve, filter 9), saving space and simplifying the assembly process, and improving the aesthetics of the machine tool.

[0050] The above are only preferred implementations of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A system for detecting air curtain failure of a machine tool spindle, characterized in that: include: A main air circuit and a main shaft air curtain air circuit connected to the main air circuit; The main gas circuit comprises an on-off switch (4) for opening / closing the main gas circuit and an air pressure detection component (7) for detecting the air pressure of the main gas circuit. The main gas circuit is provided with an air source inlet (1), and the air source inlet (1), the on-off switch (4) and the air pressure detection component (7) are arranged in sequence; The connection point between the spindle air curtain air path and the main air path is located at an end of the air pressure detection component (7) away from the air source inlet (1), and the spindle air curtain air path is provided with an air source outlet (15) for connecting with the spindle.

2. The system for detecting air curtain failure of a machine tool spindle according to claim 1, characterized in that: The main gas circuit also includes a water separator (2) and a main circuit pressure reducing valve (6) which are connected in sequence, one end of the water separator (2) is connected to the on-off switch (4), and the other end of the water separator (2) is connected to the gas source inlet (1); One end of the main pressure reducing valve (6) is connected to the side of the on-off switch (4) away from the air source inlet (1), and the other end of the main pressure reducing valve (6) is connected to the spindle air curtain air path, and the air pressure detection component (7) is arranged on the main pressure reducing valve (6).

3. The system for detecting air curtain failure of a machine tool spindle according to claim 2, characterized in that: The main air circuit further comprises a filter (9), one end of the filter (9) being in communication with a side of the main circuit pressure reducing valve (6) away from the air source inlet (1), and the other end of the filter (9) being in communication with the main shaft air curtain air circuit.

4. The system for detecting air curtain failure of a machine tool spindle according to claim 3, characterized in that: The system further comprises a diverter valve (11), wherein the diverter valve (11) comprises a diverter inlet and at least two diverter outlets, wherein the diverter inlet is connected to the side of the filter (9) away from the air source inlet (1), one of the diverter outlets is connected to the side of the spindle air curtain air path away from the air source outlet (15), and the remaining diverter outlets are used to connect to external pneumatic components.

5. The system for detecting air curtain failure of a machine tool spindle according to claim 4, characterized in that: The spindle air curtain gas circuit further comprises a spindle air curtain pressure reducing valve (13) and a speed regulating valve (14) connected to the spindle air curtain pressure reducing valve (13), a side of the spindle air curtain pressure reducing valve (13) away from the speed regulating valve (14) is connected to the diverter valve (11), and the air source outlet (15) is arranged on the speed regulating valve (14); and / or, The on-off switch (4) is connected to the water separator (2) via a first partition (3), and the on-off switch (4) is connected to the main pressure reducing valve (6) via a second partition (5).

6. The system for detecting air curtain failure of a machine tool spindle according to claim 5, characterized in that: The main line pressure reducing valve (6) is connected to the filter (9) via a third partition plate (8).

7. The system for detecting air curtain failure of a machine tool spindle according to claim 2, characterized in that: The main pressure reducing valve (6) is a filtering pressure reducing valve.

8. The system for detecting air curtain failure of a machine tool spindle according to claim 4, characterized in that: The on-off switch (4) is a direct-acting two-way solenoid valve; and / or, The diverter valve (11) is a T-type three-way valve.

9. The system for detecting air curtain failure of a machine tool spindle according to claim 4, characterized in that: The system further comprises an alarm module, which is electrically connected to the air pressure detection component (7) and is used for sounding an alarm according to a signal from the air pressure detection component.

10. A machine tool, characterized in that: It comprises a machine tool body and a system for detecting air curtain failure of a machine tool spindle as claimed in any one of claims 1 to 9, wherein the system for detecting air curtain failure of a machine tool spindle is arranged on the machine tool body, and the air source outlet (15) is connected to the spindle of the machine tool body.

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