A mounting structure for a central water outlet device in a vertical machining center

Abstract

This invention discloses a central water outlet device installation structure for a vertical machining center, including a spindle and a rotary joint mounted on its top. A central water outlet cylinder sleeve, fixed to the main body of the machining center, is fitted on the outer side of the top of the spindle, and a cylinder sleeve base is sealed and fixed at the bottom of the central water outlet cylinder sleeve. A rubber sealing ring is fixed at the top of the spindle, which cooperates with the cylinder sleeve base to form a labyrinth seal structure. A shuttle valve is connected to the top of the rotary joint through a connector and a high-pressure pipe. One end of the shuttle valve is connected in parallel to an external water circuit and an external air circuit. This invention reduces pressure and flow fluctuations in the spindle's central water outlet device by setting a pressure switch and a flow control valve, thus reducing the impact of pressure fluctuations on the sealing structure. At the same time, the labyrinth seal structure formed by the cylinder sleeve base and the rubber sealing ring prevents leaked liquid from flowing into the spindle gaps. Furthermore, the leak discharge connector actively collects waste liquid, completely solving the corrosion problem caused by liquid seeping down the spindle and extending the equipment's lifespan.

Description

Technical Field

[0001] This invention relates to the technology of connecting gas and liquid supply pipelines in machining centers, specifically to an installation structure for a central water outlet device in a vertical machining center. Background Technology

[0002] Currently, center cooling systems in machining centers are prone to leakage. Although existing rotary joints have leak-proof designs, leakage still occurs due to installation issues, unstable flow and pressure, and sealing problems. When the machining center is operating continuously, leakage occurs due to pressure fluctuations caused by water-vapor switching and spindle vibration. The leaked cutting fluid corrodes the spindle and timing belt, significantly reducing their service life. It also causes the timing belt and spindle bearings to malfunction, accelerating bearing wear. Therefore, we propose a new installation structure for the center cooling system in vertical machining centers. Utility Model Content

[0003] The purpose of this invention is to provide a central water outlet device installation structure for a vertical machining center.

[0004] The technical problem solved by this invention is: The existing central water outlet device is not equipped with a pressure switch and flow control valve, and the pressure and flow fluctuations at the joint reduce the reliability of the sealing effect; The rotary joint of the central water outlet device is not equipped with a leak-proof device at the connection point with the spindle. Leaking liquid will flow directly down the spindle, causing corrosion of the internal components of the spindle. The existing central water outlet device does not have protection against leakage from the rotary joint or a waste liquid collection device.

[0005] The present invention can be achieved by the following technical solution: a center water outlet device mounting structure for a vertical machining center, including a spindle and a rotary joint disposed on its top, wherein the bottom of the rotary joint is fixed to the spindle so as to rotate freely, and the top of the rotary joint remains relatively fixed; A central water outlet cylinder sleeve, which is fixed to the main body of the machining center, is fitted on the outer side of the top of the spindle. A cylinder sleeve base is sealed and fixed at the bottom of the central water outlet cylinder sleeve. The top of the spindle passes through the cylinder sleeve base, and a rubber sealing ring is fixed at the end to cooperate with the cylinder sleeve base to form a labyrinth sealing structure. The top of the rotary joint is connected to a shuttle valve for switching water / air media via a connector and a high-pressure pipe. The end of the shuttle valve away from the high-pressure pipe is connected in parallel to an external water circuit and an external air circuit.

[0006] A further technical improvement of the present invention is that an overflow connector is connected to one side of the top of the rotary joint for discharging excess cutting fluid into the rotary joint.

[0007] A further technical improvement of the present invention is that a seepage discharge connector is provided on one side of the bottom of the central water outlet cylinder liner to discharge the cutting fluid leaking from the joints connected to the rotary joint.

[0008] A further technical improvement of the present invention is that the external water circuit includes a flow control valve and a pressure control switch that are sequentially connected to the shuttle valve.

[0009] A further technical improvement of the present invention is that: the external air circuit includes an air source inlet connector that is connected to the shuttle valve, and the air source is adjusted and filtered by the starter disc.

[0010] A further technical improvement of the present invention is that the cylinder liner base is fixedly connected to the bottom of the center outlet cylinder liner by an internal hexagonal head bolt, and a rubber sealing ring is provided in the inner gap for sealing.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model monitors the inlet pressure in real time through a pressure control switch and links it with the CNC system. Combined with a flow control valve to stabilize the flow, it significantly reduces the impact of pressure fluctuations on the sealing structure and improves the reliability of the seal.

[0012] 2. This utility model adopts a labyrinth sealing structure composed of a cylinder liner base and a rubber sealing ring, which physically prevents the leakage liquid from flowing into the main shaft gap; at the same time, the waste liquid is actively collected through the leakage discharge joint, which completely solves the corrosion problem caused by the liquid seeping down the main shaft.

[0013] 3. This utility model discharges excess liquid from the rotary joint through the overflow connector and recovers waste liquid intercepted by the labyrinth structure through the seepage discharge connector, thereby preventing the cutting fluid from corroding the spindle and surrounding components and extending the equipment life. Attached Figure Description

[0014] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of cross-section along line A; Figure 3 For the present invention Figure 2 A magnified view of a section at point B in the middle; Figure 4 For the present invention Figure 2 A magnified view of a section at point C.

[0016] In the diagram: 1. Pressure control switch; 2. First connector; 3. Flow control valve; 4. Second connector; 5. Air source inlet connector; 6. Shuttle valve; 7. Third connector; 8. High-pressure pipe; 9. Transition connector; 10. Rotary connector; 11. Overflow connector; 12. Leakage discharge connector; 13. Cylinder liner base; 14. Center outlet cylinder liner; 15. Rubber sealing ring; 16. Hex socket head cap bolt; 17. Rubber sealing ring; 18. Main shaft. Detailed Implementation

[0017] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0018] Please see Figures 1-4 As shown, a center water outlet device mounting structure for a vertical machining center includes a spindle 18, on which a rotary joint 10 is rotatably mounted. The rotary joint 10 is a connecting component that introduces water / air into the spindle 18, and it contains bearings to ensure that air and cutting fluid can smoothly enter the spindle 18 while the spindle rotates. The bottom of the rotary joint 10 is connected to the spindle 18 and rotates with it, while the top of the rotary joint 10 is fixed. An overflow connector 11 is connected to one side of the fixed end of the rotary joint 10 for discharging excess cutting fluid entering the rotary joint 10. A center water outlet cylinder sleeve 14 is fitted on the outside of the spindle 18. The center water outlet cylinder sleeve 14 is fixed to the machining center body. The bottom of the center water outlet cylinder sleeve 14 is fixedly connected to the cylinder sleeve base 13 by an internal hexagonal head bolt 16. A rubber sealing ring 17 is installed at the inner joint of the cylinder sleeve base 13 to ensure the sealing of the connection. At the same time, a rubber sealing ring 15 is coaxially fixed on the outer circumference of the spindle 18. The rubber sealing ring 15 and the cylinder sleeve base 13 cooperate to form a labyrinth ring to prevent liquid from flowing out from the gap between the cylinder sleeve base 13 and the spindle 18. A seepage discharge connector 12 is connected to one side of the bottom of the center water outlet cylinder sleeve 14 to discharge the leaking liquid from each joint on the rotary joint 10 blocked by the rubber sealing ring 15 to the center water outlet cylinder sleeve 14.

[0019] The top fixed end of the rotary joint 10 is connected to the high-pressure pipe 8 through the transition joint 9. The high-pressure pipe 8 is used to introduce gas and liquid into the rotary joint 10. The end of the high-pressure pipe 8 away from the rotary joint 10 is connected to the shuttle valve 6 through the third joint 7. The main function of the shuttle valve 6 is to switch between water and gas under the control of the system and the solenoid valve, thereby realizing the air intake state or water intake state of the hollow spindle 18. The end of the shuttle valve 6 away from the high-pressure pipe 8 is connected in parallel to the external water passage and the external air passage. The external water circuit includes a flow control valve 3 connected via a second connector 4. The flow control valve 3 is connected to a pressure control switch 1 via a first connector 2. The function of the pressure control switch 1 is to detect the inlet cutting fluid pressure signal and feed it back to the CNC system for display, alarm and signal control. The external air circuit includes an external air source connected through the air source inlet connector 5. The air source inlet connector 5 is used to connect the air source. The air source needs to have its air pressure regulated by the starter plate and be filtered for water vapor and impurities.

[0020] In use, the present invention monitors the overall pressure of the cutting fluid filtered by the central water outlet filter at the inlet through the pressure control switch 1 to check whether the pressure is within the range that the device can withstand, and the pressure value is fed back to the CNC system for monitoring; then the inlet flow rate is adjusted by the flow control valve 3, and the flow rate is a preset fixed value; the device is judged to have a large leakage based on the data from the pressure control switch 1 and the flow control valve 3.

[0021] Shuttle valve 6 switches the communication channels between cutting fluid and air and rotary joint 10 to ensure that the medium entering rotary joint 10 is a single medium; if an excess of cutting fluid occurs during the supply process, overflow joint 11 discharges the excess cutting fluid, and at the same time, leakage discharge joint 12 discharges the leakage liquid blocked on the cylinder liner base 13 to prevent it from entering the gap between cylinder liner base 13 and spindle 18.

[0022] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A mounting structure for a central water outlet device in a vertical machining center, characterized in that: Includes a main shaft (18) and a rotary joint (10) disposed on its top, the bottom of the rotary joint (10) being fixed to the main shaft (18) so as to rotate freely, and the top of the rotary joint (10) remaining relatively fixed; The top outer side of the main spindle (18) is fitted with a central water outlet cylinder sleeve (14) fixed to the main body of the machining center, and the bottom of the central water outlet cylinder sleeve (14) is sealed and fixed with a cylinder sleeve base (13); the top of the main spindle (18) passes through the cylinder sleeve base (13), and the end is fixed with a rubber sealing ring (15) which cooperates with the cylinder sleeve base (13) to form a labyrinth sealing structure. The top of the rotary joint (10) is connected to a shuttle valve (6) for switching water / air media via a connector and a high-pressure pipe (8). The end of the shuttle valve (6) away from the high-pressure pipe (8) is connected in parallel to an external water circuit and an external air circuit.

2. The installation structure of the center water outlet device of a vertical machining center according to claim 1, characterized in that, An overflow connector (11) is connected to the top side of the rotary joint (10) for discharging excess cutting fluid into the rotary joint (10).

3. The installation structure of the center water outlet device of a vertical machining center according to claim 1, characterized in that, The bottom side of the central water outlet cylinder liner (14) is connected to a seepage discharge joint (12) to discharge the cutting fluid that leaks from the joints connected to the rotary joint (10).

4. The installation structure of the center water outlet device of a vertical machining center according to claim 1, characterized in that, The external water circuit includes a flow control valve (3) and a pressure control switch (1) that are sequentially connected to the shuttle valve (6).

5. The installation structure of the center water outlet device of a vertical machining center according to claim 1, characterized in that, The external air circuit includes an air source inlet connector (5) connected to the shuttle valve (6), and the air source is adjusted and filtered by the starter disc.

6. The installation structure of the center water outlet device of a vertical machining center according to claim 1, characterized in that, The cylinder liner base (13) is fixedly connected to the bottom of the center outlet cylinder liner (14) by an internal hexagonal head bolt (16), and a rubber sealing ring (17) is provided in the inner gap for sealing.

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