Sealing Structure of the Workpiece Spindle of a CNC Vertical Lathe

Abstract

The present invention belongs to the technical field of bearing processing equipment, and particularly relates to a sealing structure for the workpiece spindle of a numerically controlled vertical lathe. It includes an upper sleeve, an intermediate annular plate, and a lower sleeve; the bottom of the upper sleeve is fixedly connected to the inner diameter of the intermediate annular plate, and the outer diameter of the intermediate annular plate is fixedly connected to the upper part of the lower sleeve; the upper sleeve is detachably sleeved on the chuck of the numerically controlled vertical lathe, and the structure formed by the intermediate annular plate and the lower sleeve covers the connection position between the upper end cover of the spindle of the numerically controlled vertical lathe and the bed body. It avoids the infiltration of cooling water into the hydraulic system of the machine tool, eliminates such faults of the machine tool, saves hydraulic oil, workpiece rejects, maintenance cycle, and spare parts costs, and ensures the continuous production and processing of the machine tool.

Description

Technical Field

[0001] The present invention belongs to the technical field of bearing processing equipment, and particularly relates to a sealing structure for the workpiece spindle of a numerically controlled vertical lathe. Background Art

[0002] Existing numerically controlled vertical lathe equipment undertakes the processing of various processes of large bearing rings. During the processing, it is necessary to use cooling water to cool the cutting tool and the workpiece. Due to the defects of the original sealing structure of the workpiece spindle of the machine tool, the cooling water seeps into the spindle of the machine tool. The leaked cooling water flows into the oil sump through the spindle and then back to the fuel tank through the return oil pipe, polluting the hydraulic oil and causing various faults in the hydraulic system, which occur frequently. When more cooling water is mixed in, the hydraulic system will generate pressure fluctuations, resulting in unstable pressure. If a workpiece is being processed at this time, the clamping pressure of the chuck will be reduced. When the cutting force is greater than the clamping force, the workpiece will rotate, flip and fly out, and the tool holder will fall off, the workpiece will become a waste product, and even personal and equipment accidents will occur.

[0003] In the above situation, when repairing, it is necessary to change the hydraulic oil, clean the fuel tank, adjust the pressure and then work. The hydraulic oil needs to be replaced about every 2 to 6 months. The spare parts cost, hydraulic oil, maintenance cycle, workpiece waste products, etc. caused by such faults every year are tens of thousands of yuan, resulting in waste and increased costs. Summary of the Invention

[0004] In view of the defects of the prior art, the present invention provides a sealing structure for the workpiece spindle of a numerically controlled vertical lathe, which avoids the infiltration of cooling water into the hydraulic system of the machine tool, eliminates such faults of the machine tool, saves hydraulic oil, workpiece waste products, maintenance cycle and spare parts cost, and ensures the continuous production and processing of the machine tool.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is a sealing structure for the workpiece spindle of a numerically controlled vertical lathe, which includes an upper sleeve, an intermediate annular plate, and a lower sleeve; the bottom of the upper sleeve is fixedly connected to the inner diameter of the intermediate annular plate, and the outer diameter of the intermediate annular plate is fixedly connected to the upper part of the lower sleeve; the upper sleeve is detachably sleeved on the chuck of the numerically controlled vertical lathe, and the structure formed by the intermediate annular plate and the lower sleeve covers the connection position between the upper end cover of the spindle of the numerically controlled vertical lathe and the bed body.

[0006] Further, a plurality of threaded holes are opened on the outer diameter of the chuck of the numerically controlled vertical lathe, and the upper sleeve is fixed to the chuck of the numerically controlled vertical lathe through a plurality of screws.

[0007] Preferably, 12 screw holes are provided on the upper sleeve and are evenly distributed in a circumferential manner, and the positions of the screw holes correspond to the threaded holes one by one.

[0008] Preferably, the screw holes are countersunk screw holes, and the screws are M8 countersunk screws.

[0009] Further, the upper part of the middle annular plate is a slope surface that slopes from one side of the chuck of the CNC vertical lathe towards the side away from the chuck of the CNC vertical lathe.

[0010] Further, the bottom of the upper sleeve contacts the edge of the upper end cover of the spindle of the CNC vertical lathe, and a sealant coating is provided between the bottom of the upper sleeve, the connection position between the upper sleeve and the inner diameter of the middle annular plate, and the edge of the upper end cover of the spindle of the CNC vertical lathe.

[0011] Further, a sealant coating is provided at the connection position between the upper end cover of the spindle of the CNC vertical lathe and the machine body.

[0012] On the other hand, the present invention provides a method for sealing the workpiece spindle of a CNC vertical lathe, and its specific steps include:

[0013] Roll the upper sleeve, roll the lower sleeve, and make an intermediate annular plate. Fix the bottom of the upper sleeve to the inner diameter of the intermediate annular plate, and fix the outer diameter of the intermediate annular plate to the upper part of the lower sleeve; process a number of screw holes on the upper sleeve to obtain a cap-shaped sealing ring; install the cap-shaped sealing ring on the chuck of the CNC vertical lathe, position the bottom of the upper sleeve in contact with the upper end cover of the spindle of the CNC vertical lathe, and fix it with countersunk head screws.

[0014] The above method is further described, and the specific steps include:

[0015] Step 1: Roll an upper sleeve with an iron plate, then roll a lower sleeve with an iron plate, and then turn an intermediate annular plate. Weld the lower part of the upper sleeve to the inner diameter of the intermediate annular plate, weld the upper part of the lower sleeve to the outer diameter of the intermediate annular plate, and process a number of circumferentially evenly distributed countersunk head screw holes on the upper sleeve to obtain a cap-shaped sealing ring;

[0016] Step 2: Disassemble and lift the chuck of the CNC vertical lathe and place it on the platform. Remove the upper end cover of the spindle of the CNC vertical lathe, apply a sealant coating and then reinstall the upper end cover;

[0017] Step 3: Fit the cap-shaped sealing ring made in Step 1 onto the chuck. The bottom surface of the cap-shaped sealing ring contacts and positions the upper end cover of the spindle of the CNC vertical lathe. Then, based on the countersunk head screw holes on the upper sleeve on the chuck, make a number of threaded holes;

[0018] Step 4: Remove the cap-shaped sealing ring, reinstall the chuck on the spindle, apply a sealant coating at the lower end of the chuck and the end face of the upper end cover of the spindle, then fit the cap-shaped sealing ring onto the chuck and fix it with countersunk head screws.

[0019] The beneficial effects of the present invention: It avoids the infiltration of cooling water into the hydraulic system of the machine tool, eliminates such faults of the machine tool, saves hydraulic oil, workpiece rejects, maintenance cycle and spare part costs, and ensures the continuous production and processing of the machine tool. Description of the Drawings

[0020] Figure 1 is the structural schematic diagram of the present invention;

[0021] Figure 2 is the structural schematic diagram of the cap-shaped sealing ring;

[0022] In the figure: 1. Chuck of CNC vertical lathe, 2. Cap-shaped sealing ring, 2.1 Upper sleeve, 2.2 Intermediate annular plate, 2.3 Lower sleeve, 3. M8 countersunk head screw, 4. Upper end cover of the main shaft, 5. Main shaft, 6.1 First sealant coating, 6.2 Second sealant coating, 7. Bed body. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the present invention clearer, the following will be described in conjunction with the drawings in the specification and specific examples.

[0024] Embodiment 1

[0025] As Figure 1 shown, the workpiece main shaft sealing structure of the CNC vertical lathe includes an upper sleeve 2.1, an intermediate annular plate 2.2 and a lower sleeve 2.3; the bottom of the upper sleeve 2.1 is fixedly connected to the inner diameter of the intermediate annular plate 2.2, and the outer diameter of the intermediate annular plate 2.2 is fixedly connected to the upper part of the lower sleeve 2.3; the upper sleeve 2.1 is detachably sleeved on the chuck 1 of the CNC vertical lathe, and the structure formed by the intermediate annular plate 2.2 and the lower sleeve 2.3 covers the connection position between the upper end cover 4 of the main shaft of the CNC vertical lathe and the bed body 7.

[0026] Furthermore, a plurality of threaded holes are opened on the outer diameter of the chuck 1 of the CNC vertical lathe, and the upper sleeve 2.1 is fixed to the chuck 1 of the CNC vertical lathe through a plurality of screws.

[0027] Preferably, 12 screw holes are evenly distributed in a circumferential manner on the upper sleeve 2.1, and the positions of the screw holes correspond to the threaded holes one by one.

[0028] Preferably, the screw holes are countersunk head screw holes, and the screws are M8 countersunk head screws 3.

[0029] Furthermore, the upper part of the intermediate annular plate 2.2 is a slope that inclines from one side of the chuck 1 of the CNC vertical lathe to the side away from the chuck 1 of the CNC vertical lathe.

[0030] Furthermore, the bottom of the upper sleeve 2.1 is in contact with the edge of the upper end cover 4 of the main shaft of the CNC vertical lathe, and a first sealant coating 6.1 is provided among the bottom of the upper sleeve 2.1, the connection position between the upper sleeve 2.1 and the inner diameter of the intermediate annular plate 2.2, and the edge of the upper end cover 4 of the main shaft of the CNC vertical lathe.

[0031] Further, a second sealant coating 6.2 is provided at the connection position between the upper end cover 4 of the spindle of the CNC vertical lathe and the machine body 7.

[0032] On the other hand, the present invention provides a method for sealing the workpiece spindle of a CNC vertical lathe, and its specific steps include:

[0033] Step 1: The cap-shaped sealing ring 2 is made of three iron plates. First, an upper sleeve 2.1 is formed by rolling an iron plate, then a lower sleeve 2.3 is formed by rolling an iron plate, and then an intermediate annular plate 2.2 is turned. The lower part of the upper sleeve 2.1 is welded to the inner diameter of the intermediate annular plate 2.2, the upper part of the lower sleeve 2.3 is welded to the outer diameter of the intermediate annular plate 2.2, and a number of countersunk screw holes evenly distributed in the circumferential direction are machined on the upper sleeve 2.1 to obtain the cap-shaped sealing ring 2; ensure the dimensions and machining accuracy during this process.

[0034] Step 2: Remove and lift the chuck 1 of the CNC vertical lathe and place it on the platform. Remove the upper end cover 4 of the spindle of the CNC vertical lathe, apply a sealant coating and then reinstall it on the upper end cover 4 of the spindle;

[0035] Step 3: Fit the cap-shaped sealing ring 2 made in Step 1 onto the chuck 1 of the CNC vertical lathe. The bottom surface of the cap-shaped sealing ring 2 is in contact with and positioned against the upper end cover 4 of the spindle of the CNC vertical lathe. Then, with reference to the countersunk screw holes on the upper sleeve 2.1 on the chuck 1 of the CNC vertical lathe, a number of threaded holes are made by matching;

[0036] Step 4: Remove the cap-shaped sealing ring 2, reinstall the chuck 1 on the spindle 5, apply a sealant coating at the lower end of the chuck 1 of the CNC vertical lathe and the end face of the upper end cover 4, then fit the cap-shaped sealing ring 2 onto the chuck 1 of the CNC vertical lathe and fix it with M8 countersunk screws 3.

[0037] It should be noted that M8 countersunk screws 3 are selected so that there is no protruding high point when fixing the sealing ring, and there will be no rubbing phenomenon during the rotation of the chuck. After the sealant coating solidifies, the improvement work on the workpiece spindle sealing structure of the CNC vertical lathe is completed.

[0038] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Those skilled in the art make some simple modifications, equivalent changes or decorations using the disclosed technical content above, and all fall within the protection scope of the present invention.

Claims

1. The sealing structure of the workpiece spindle of a numerically controlled vertical lathe, characterized in that: It includes an upper sleeve, an intermediate annular plate, and a lower sleeve; the bottom of the upper sleeve is fixedly connected to the inner diameter of the intermediate annular plate, and the outer diameter of the intermediate annular plate is fixedly connected to the upper part of the lower sleeve; the upper sleeve is detachably sleeved on the chuck of a CNC vertical lathe, and the structure formed by the intermediate annular plate and the lower sleeve covers the connection position between the upper end cover of the spindle of the CNC vertical lathe and the bed body; A number of threaded holes are provided on the outer diameter of the chuck of the CNC vertical lathe, and the upper sleeve is fixed to the chuck of the CNC vertical lathe by a number of screws; The bottom of the upper sleeve is in contact with the edge of the upper end cover of the spindle of the CNC vertical lathe, and a sealant coating is provided among the bottom of the upper sleeve, the connection position between the inner diameter of the upper sleeve and the intermediate annular plate, and the edge of the upper end cover of the spindle of the CNC vertical lathe; A sealant coating is provided at the connection position between the upper end cover of the spindle of the CNC vertical lathe and the bed body; The specific steps for manufacturing the workpiece spindle sealing structure of the CNC vertical lathe include: Roll the upper sleeve, roll the lower sleeve, make an intermediate annular plate, fix the bottom of the upper sleeve to the inner diameter of the intermediate annular plate, and fix the outer diameter of the intermediate annular plate to the upper part of the lower sleeve; process a number of screw holes on the upper sleeve to obtain a cap-shaped sealing ring; install the cap-shaped sealing ring on the chuck of the CNC vertical lathe, position the bottom of the upper sleeve in contact with the upper end cover of the spindle of the CNC vertical lathe, and fix it with countersunk head screws; Step 1: Roll an upper sleeve with an iron plate, then roll a lower sleeve with an iron plate, and then turn an intermediate annular plate. Weld the lower part of the upper sleeve to the inner diameter of the intermediate annular plate, weld the upper part of the lower sleeve to the outer diameter of the intermediate annular plate, and process a number of circumferentially evenly distributed countersunk head screw holes on the upper sleeve to obtain a cap-shaped sealing ring; Step 2: Disassemble and lift the chuck of the CNC vertical lathe and place it on a platform. Remove the upper end cover of the spindle of the CNC vertical lathe, apply a sealant coating and then reinstall the upper end cover; Step 3: Put the cap-shaped sealing ring made in Step 1 on the chuck, position the bottom surface of the cap-shaped sealing ring in contact with the upper end cover of the spindle of the CNC vertical lathe, and then, based on the countersunk head screw holes on the upper sleeve on the chuck, make a number of threaded holes by matching; Step 4: Remove the cap-shaped sealing ring, install the chuck back on the spindle, apply a sealant coating at the lower end of the chuck and the end face of the upper end cover of the spindle, then put the cap-shaped sealing ring on the chuck and fix it with countersunk head screws.

2. The sealing structure of the workpiece spindle of the numerically controlled vertical lathe according to claim 1, characterized in that: 12 circumferentially evenly distributed screw holes are provided on the upper sleeve, and the positions of the screw holes correspond one by one to the threaded holes.

3. The CNC vertical lathe workpiece spindle sealing structure according to claim 2, characterized in that: The screw holes are countersunk head screw holes, and the screws are M8 countersunk head screws.

4. The sealed structure of the workpiece spindle of the numerically controlled vertical lathe according to claim 1, wherein: The upper part of the intermediate annular plate is a slope that slopes from one side of the chuck of the CNC vertical lathe to the side away from the chuck of the CNC vertical lathe.

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