CN109570915B - Machining device for large hydrostatic bearing and bearing machining method using machining device - Google Patents
Machining device for large hydrostatic bearing and bearing machining method using machining device Download PDFInfo
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- CN109570915B CN109570915B CN201811307889.2A CN201811307889A CN109570915B CN 109570915 B CN109570915 B CN 109570915B CN 201811307889 A CN201811307889 A CN 201811307889A CN 109570915 B CN109570915 B CN 109570915B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/003—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass bearings
Abstract
The invention discloses a processing device of a large hydrostatic bearing and a bearing processing method using the same, and relates to the field of processing of large hydrostatic bearings; the plasma powder feeding device is connected with the pushing device in a sliding mode, the pushing device is connected with a welding gun, the welding gun comprises a gun head and a gun body, the gun head is located in the hydrostatic bearing, the plasma powder feeding device is connected with the welding gun, the plasma powder feeding device is provided with an electromagnetic valve for switching a powder feeding pipe, the position changing machine comprises a position changing machine ring, a plurality of contacts are arranged at the edge of the position changing machine ring, a proximity switch is arranged near the edge of the position changing machine ring, the proximity switch is electrically connected with a time relay, and the time relay is electrically connected with the electromagnetic valve; the invention has high processing efficiency.
Description
Technical Field
The invention belongs to the field of large hydrostatic bearing processing, and particularly relates to a processing device and a processing method for a large hydrostatic bearing.
Background
The hydrostatic bearing is a core component in the hydroelectric generator, plays a role in supporting and lubricating, protects the normal work of a rotating component, and directly determines the service life of equipment.
The pressure bearing is bulky, hydrostatic bearing hole build-up welding area exceeds 1.5 square meters, the hydrostatic bearing inside wall is equipped with a plurality of rectangle recesses, the rectangle recess distributes along hydrostatic bearing's circumferencial direction, conventional art generally carries out continuous build-up welding to hydrostatic bearing body inside wall, then carry out the milling flutes to the hydrostatic bearing that the build-up welding was accomplished, because hydrostatic bearing is bulky, this hydrostatic bearing's material hardness is big simultaneously, consequently, the milling flutes speed is very slow, it needs more than 48 hours to mill a rectangle recess, machining efficiency is very low.
Disclosure of Invention
The invention aims to overcome the defect of low processing efficiency in the prior art, and provides a processing device of a large hydrostatic bearing with high processing efficiency, wherein discontinuous overlaying is adopted, so that a few welding blocks are formed in the rectangular groove area by overlaying, the time for milling grooves is reduced, welding materials are saved, and the processing device is provided.
The invention adopts the following technical scheme that:
the utility model provides a processingequipment of large-scale hydrostatic bearing, includes vertical action bars, plasma powder send powder device and is used for the positioner of fixed hydrostatic bearing, sliding connection has thrust unit on the vertical action bars, the last welder that is connected with of thrust unit, welder includes rifle head and body of a gun, the rifle head is located hydrostatic bearing, plasma powder send powder device and welder connection, be equipped with the solenoid valve that is used for the switch to send the powder pipe on the plasma powder send powder device, the positioner includes the positioner ring, positioner ring edge is equipped with a plurality of contacts, near positioner ring edge is equipped with a proximity switch, proximity switch is connected with a time relay electricity, time relay is connected with the solenoid valve electricity.
When the invention is used, the hydrostatic bearing is fixed at the circle center of the ring of the positioner; according to the static pressure bearing to be processed, a plurality of contacts are arranged along the edge of the positioner ring, and 8 rectangular grooves are formed in the inner side wall of the static pressure bearing and are uniformly arranged along the circumferential direction of the static pressure bearing, so that 8 contacts are uniformly arranged in the circumferential direction of the positioner ring; adjusting the positioner to enable the static pressure bearing to be horizontal to the axis of the welding gun; adjusting the height of the pushing device to enable the distance between the gun head and the inner side wall of the hydrostatic bearing to be the distance required by work; setting a time relay according to the rotating speed of the positioner ring and the hydrostatic bearing to be processed; preheating a hydrostatic bearing; the inner side wall of the hydrostatic bearing is subjected to surfacing welding by using a welding gun, a plasma powder feeding device starts to feed powder, a positioner ring starts to rotate at the same time, a pushing device pushes the welding gun to slowly move along the axial direction of the welding gun, and the surfacing path of the gun head to the inner side wall of the hydrostatic bearing is spiral; when the ring of the positioner rotates, the ring of the positioner drives the contact to rotate, when the contact moves to the vicinity of the proximity switch, the proximity switch sends a signal to a time relay, the time relay starts timing, meanwhile, the time relay sends a signal to an electromagnetic valve, the electromagnetic valve closes a powder feeding pipe, a plasma powder feeding device stops feeding powder to a welding gun, the welding gun performs arc empty melting on the inner side wall of the hydrostatic bearing, the time relay sends a signal to the electromagnetic valve after a period of time, the electromagnetic valve opens the powder feeding pipe, the plasma powder feeding device feeds the powder to the welding gun again, and the welding gun starts overlaying welding again; after surfacing is completed, milling grooves in the inner side wall of the surfacing hydrostatic bearing; because the invention adopts the discontinuous overlaying welding during the overlaying welding, when the gun head passes through the position of the rectangular groove, the plasma powder feeding device stops feeding powder, thicker welding blocks formed by the overlaying welding are not formed at the position of the rectangular groove, meanwhile, the periphery of the rectangular groove is not smooth, the rectangular groove needs to be milled first, and the rectangular groove is milled, and because the welding blocks formed by the overlaying welding in the rectangular groove area are few, the time for milling the groove is greatly reduced, meanwhile, the welding materials are saved, and the processing efficiency can be improved by about 80 percent by adopting the invention; then, placing a panel which is made of the same material as the hydrostatic bearing in the rectangular groove on the inner side wall of the hydrostatic bearing; turning the inner side wall of the hydrostatic bearing, and adjusting the thickness of surfacing; when turning, the invention puts the paneling with the same material as the hydrostatic bearing in the rectangular groove part, thereby changing the discontinuous turning into continuous turning, effectively avoiding the jumping edge and greatly improving the service life of the cutter.
Preferably, the vertical operating rod is in threaded connection with a positioning nut which abuts against the lower part of the pushing device.
The positioning nut is connected to the straight operating rod in a threaded mode, abuts against the lower portion of the pushing device, rotates, moves up and down on the vertical operating rod, pushes the pushing device to move up and down, and accordingly height of the welding gun is adjusted, and meanwhile the height of the welding gun in the surfacing process is prevented from changing by the positioning nut.
Preferably, the welding gun comprises a gun head and a gun body, the gun head is sleeved with a gun head protection cover matched with the gun head, the gun body is sleeved with a gun body protection cover matched with the gun body, cooling liquid flowing cavities are formed in the gun head protection cover and the gun body protection cover respectively, a cooling liquid circulating water tank is arranged outside the gun body protection cover, a water inlet pipe and a water outlet pipe are arranged on the cooling liquid circulating water tank, the cooling liquid flowing cavities are connected with the cooling liquid circulating water tank through the water inlet pipe, and the cooling liquid flowing cavities are connected with the cooling liquid circulating water tank through the water outlet pipe.
The invention works for a long time at a higher preheating temperature (more than or equal to 600 ℃), the gun head is sleeved with the gun head protective cover matched with the gun head, the gun body is sleeved with the gun body protective cover matched with the gun body, and the gun head protective cover and the gun body protective cover protect the gun head and the gun body, so that the gun head and the gun body are not directly heated, and the temperature of the gun head and the gun body is reduced; cooling liquid flowing cavities are arranged in the gun head protective cover and the gun body protective cover, a water inlet pipe and a water outlet pipe are arranged on the cooling liquid circulating water tank, the cooling liquid flowing cavities are connected with the cooling liquid circulating water tank through the water inlet pipe, and the cooling liquid flowing cavities are connected with the cooling liquid circulating water tank through the water outlet pipe; when the welding gun is in operation, the cooling liquid is continuously circulated and input into the cooling liquid flowing cavities in the gun head protective cover and the gun body protective cover by the cooling liquid circulating water tank, so that the gun head protective cover and the gun body protective cover are always at a lower temperature, the temperature in the gun head protective cover and the gun body protective cover is ensured not to rise, the surface temperature of the welding gun is not more than 70 ℃ after the welding gun continuously operates for 45 hours in an environment higher than 600 ℃, and the welding gun is ensured not to be burnt out under long-time operation.
A bearing processing method applying a large-scale hydrostatic bearing processing device comprises the following specific steps:
(1) fixing a hydrostatic bearing at the circle center of the positioner ring, wherein the hydrostatic bearing is of a cylindrical structure, and when the positioner ring rotates, the hydrostatic bearing rotates along the axis of the hydrostatic bearing;
(2) arranging contacts along the edge of the positioner ring, determining the number and the positions of the contacts according to the number and the positions of rectangular grooves of the hydrostatic bearing to be processed, wherein the number of the contacts is equal to that of the rectangular grooves of the hydrostatic bearing, and the connecting line of each contact and the corresponding rectangular groove is intersected with the shaft of the hydrostatic bearing;
(3) adjusting the positioner to enable the static pressure bearing to be horizontal to the axis of the welding gun, and keeping the distance between the gun head and the inner wall of the static pressure bearing unchanged when the welding gun moves along the axis of the welding gun;
(4) adjusting the height of the pushing device to enable the distance between the gun head and the inner side wall of the hydrostatic bearing to be the distance required by work;
(5) setting a time relay according to the rotating speed of the circular ring of the positioner and the width of the rectangular groove of the hydrostatic bearing to be processed, wherein the time relay controls the time interval from powder feeding stop to powder feeding restart of the plasma powder feeding device, and the powder feeding stop is to prevent a welding block from being formed in the rectangular groove of the hydrostatic bearing, so that the larger the width of the rectangular groove is, the larger the time interval from power failure to power re-energization of the time relay is, the slower the rotating speed of the circular ring of the positioner is, the larger the time interval from power failure to power re-energization of the time relay is, and vice versa;
(6) preheating the hydrostatic bearing to prepare for surfacing;
(7) the inner side wall of the hydrostatic bearing is subjected to surfacing welding by using a welding gun, a plasma powder feeding device starts to feed powder, a positioner ring starts to rotate at the same time, a pushing device pushes the welding gun to slowly move along the axial direction of the welding gun, and the surfacing path of the gun head to the inner side wall of the hydrostatic bearing is spiral;
(8) when the ring of the positioner rotates, the ring of the positioner drives the contact to rotate, when the contact moves to the vicinity of the proximity switch, the proximity switch sends a signal to a time relay, the time relay starts timing, meanwhile, the time relay sends a signal to an electromagnetic valve, the electromagnetic valve closes a powder feeding pipe, a plasma powder feeding device stops feeding powder to a welding gun, the welding gun performs arc empty melting on the inner side wall of the hydrostatic bearing, the time relay sends a signal to the electromagnetic valve after a period of time, the electromagnetic valve opens the powder feeding pipe, the plasma powder feeding device feeds the powder to the welding gun again, and the welding gun starts overlaying welding again;
(9) the inner side wall of the static pressure bearing after overlaying is milled, because the invention adopts interrupted overlaying during overlaying, and when the gun head passes through the position of the rectangular groove, the plasma powder feeding device stops feeding powder, thicker welding blocks formed by overlaying are not formed at the position of the rectangular groove, meanwhile, the periphery of the rectangular groove is not smooth, the rectangular groove needs to be milled first, and the rectangular groove is milled, because the welding blocks formed by overlaying in the rectangular groove area are few, the time of milling the groove is greatly reduced, meanwhile, welding materials are saved, and the processing efficiency can be improved by about 80 percent by adopting the invention;
(10) a panel made of the same material as the hydrostatic bearing is placed in the rectangular groove on the inner side wall of the hydrostatic bearing;
(11) the inner side wall of the hydrostatic bearing is turned, the thickness of overlaying is adjusted, the hydrostatic bearing after groove milling is directly turned in the turning process of the traditional technology, due to the existence of the rectangular groove, when a tool bit passes through the rectangular groove, a section of neutral space exists, the tool bit is easy to generate edge jumping, and the service life of the tool is short.
The invention has the beneficial effects that: (1) because the invention adopts the discontinuous overlaying welding during the overlaying welding, when the gun head passes through the position of the rectangular groove, the plasma powder feeding device stops feeding powder, thicker welding blocks formed by the overlaying welding are not formed at the position of the rectangular groove, meanwhile, the periphery of the rectangular groove is not smooth, the rectangular groove needs to be milled first, and the rectangular groove is milled, and because the welding blocks formed by the overlaying welding in the rectangular groove area are few, the time for milling the groove is greatly reduced, meanwhile, the welding materials are saved, and the processing efficiency can be improved by about 80 percent by adopting the invention; (2) the panel made of the same material as the hydrostatic bearing is placed in the rectangular groove part, so that the intermittent turning is changed into continuous turning, the edge jumping is effectively avoided, and the service life of the cutter is greatly prolonged; (3) the positioning nut is rotated, moves up and down on the vertical operating rod, pushes the pushing device to move up and down, so that the height of the welding gun is adjusted, and meanwhile, the positioning nut prevents the height of the welding gun from changing in the surfacing process; (4) the gun head protective cover and the gun body protective cover protect the gun head and the gun body, so that the gun head and the gun body are not directly heated, and the temperature of the gun head and the gun body is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a cross-sectional view of a hydrostatic bearing;
FIG. 4 is a schematic view of a torch;
fig. 5 is a cross-sectional view of the welding gun.
The method comprises the following steps: the device comprises a vertical operating rod 1, a pushing device 2, a welding gun 3, a plasma powder feeding device 4, an electromagnetic valve 5, a positioner 6, a static pressure bearing 7, a gun head 8, a positioner ring 9, a contact 10, a proximity switch 11, a gun body 12, a gun head protective cover 13, a gun body protective cover 14, a cooling liquid flowing cavity 15, a cooling liquid circulating water tank 16, a water inlet pipe 17, a water outlet pipe 18 and a positioning nut 19.
Detailed Description
The invention will be further described in detail with reference to the following drawings and detailed description:
FIG. 1, FIG. 2 and FIG. 3 show a large-scale hydrostatic bearing processing device, which comprises a vertical operating rod 1, a plasma powder feeding device 4 and a positioner 6 for fixing a hydrostatic bearing 7, the vertical operating rod 1 is connected with a pushing device 2 in a sliding way, the pushing device 2 is connected with a welding gun 3, the welding gun 3 comprises a gun head 8 and a gun body 12, the gun head 8 is positioned in the hydrostatic bearing 7, the plasma powder feeding device 4 is connected with the welding gun 3, the plasma powder feeding device 4 is provided with an electromagnetic valve 5 for opening and closing a powder feeding pipe, the position changing machine 6 comprises a position changing machine ring 9, a plurality of contacts 10 are arranged at the edge of the positioner ring 9, a proximity switch 11 is arranged near the edge of the positioner ring 9, the proximity switch 11 is electrically connected to a time relay, which is electrically connected to the solenoid valve 5.
When the invention is used, the hydrostatic bearing is fixed at the circle center of the ring of the positioner; according to the static pressure bearing to be processed, a plurality of contacts are arranged along the edge of the positioner ring, and 8 rectangular grooves are formed in the inner side wall of the static pressure bearing and are uniformly arranged along the circumferential direction of the static pressure bearing, so that 8 contacts are uniformly arranged in the circumferential direction of the positioner ring; adjusting the positioner to enable the static pressure bearing to be horizontal to the axis of the welding gun; adjusting the height of the pushing device to enable the distance between the gun head and the inner side wall of the hydrostatic bearing to be the distance required by work; setting a time relay according to the rotating speed of the positioner ring and the hydrostatic bearing to be processed; preheating a hydrostatic bearing; the inner side wall of the hydrostatic bearing is subjected to surfacing welding by using a welding gun, a plasma powder feeding device starts to feed powder, a positioner ring starts to rotate at the same time, a pushing device pushes the welding gun to slowly move along the axial direction of the welding gun, and the surfacing path of the gun head to the inner side wall of the hydrostatic bearing is spiral; when the ring of the positioner rotates, the ring of the positioner drives the contact to rotate, when the contact moves to the vicinity of the proximity switch, the proximity switch sends a signal to a time relay, the time relay starts timing, meanwhile, the time relay sends a signal to an electromagnetic valve, the electromagnetic valve closes a powder feeding pipe, a plasma powder feeding device stops feeding powder to a welding gun, the welding gun performs arc empty melting on the inner side wall of the hydrostatic bearing, the time relay sends a signal to the electromagnetic valve after a period of time, the electromagnetic valve opens the powder feeding pipe, the plasma powder feeding device feeds the powder to the welding gun again, and the welding gun starts overlaying welding again; after surfacing is completed, milling grooves in the inner side wall of the surfacing hydrostatic bearing; because the invention adopts the discontinuous overlaying welding during the overlaying welding, when the gun head passes through the position of the rectangular groove, the plasma powder feeding device stops feeding powder, thicker welding blocks formed by the overlaying welding are not formed at the position of the rectangular groove, meanwhile, the periphery of the rectangular groove is not smooth, the rectangular groove needs to be milled first, and the rectangular groove is milled, and because the welding blocks formed by the overlaying welding in the rectangular groove area are few, the time for milling the groove is greatly reduced, meanwhile, the welding materials are saved, and the processing efficiency can be improved by about 80 percent by adopting the invention; then, placing a panel which is made of the same material as the hydrostatic bearing in the rectangular groove on the inner side wall of the hydrostatic bearing; turning the inner side wall of the hydrostatic bearing, and adjusting the thickness of surfacing; when turning, the invention puts the paneling with the same material as the hydrostatic bearing in the rectangular groove part, thereby changing the discontinuous turning into continuous turning, effectively avoiding the jumping edge and greatly improving the service life of the cutter.
1 shows that a positioning nut 19 is connected to the vertical operating rod 1 in a threaded manner, and the positioning nut 19 abuts against the lower part of the pushing device 2.
The positioning nut is connected to the straight operating rod in a threaded mode, abuts against the lower portion of the pushing device, rotates, moves up and down on the vertical operating rod, pushes the pushing device to move up and down, and accordingly height of the welding gun is adjusted, and meanwhile the height of the welding gun in the surfacing process is prevented from changing by the positioning nut.
4 and 5 show that the welding gun 3 comprises a gun head 8 and a gun body 12, a gun head protective cover 13 matched with the gun head 8 is sleeved on the gun head 8, a gun body protective cover 14 matched with the gun body 12 is sleeved on the gun body 12, cooling liquid flowing cavities 15 are formed in the gun head protective cover 13 and the gun body protective cover 14, a cooling liquid circulating water tank 16 is arranged outside the gun body protective cover 14, a water inlet pipe 17 and a water outlet pipe 18 are arranged on the cooling liquid circulating water tank 16, the cooling liquid flowing cavities 15 are connected with the cooling liquid circulating water tank 16 through the water inlet pipe 17, and the cooling liquid flowing cavities 15 are connected with the cooling liquid circulating water tank 16 through the water outlet pipe 18.
The invention works for a long time at a higher preheating temperature (more than or equal to 600 ℃), the gun head is sleeved with the gun head protective cover matched with the gun head, the gun body is sleeved with the gun body protective cover matched with the gun body, and the gun head protective cover and the gun body protective cover protect the gun head and the gun body, so that the gun head and the gun body are not directly heated, and the temperature of the gun head and the gun body is reduced; cooling liquid flowing cavities are arranged in the gun head protective cover and the gun body protective cover, a water inlet pipe and a water outlet pipe are arranged on the cooling liquid circulating water tank, the cooling liquid flowing cavities are connected with the cooling liquid circulating water tank through the water inlet pipe, and the cooling liquid flowing cavities are connected with the cooling liquid circulating water tank through the water outlet pipe; when the welding gun is in operation, the cooling liquid is continuously circulated and input into the cooling liquid flowing cavities in the gun head protective cover and the gun body protective cover by the cooling liquid circulating water tank, so that the gun head protective cover and the gun body protective cover are always at a lower temperature, the temperature in the gun head protective cover and the gun body protective cover is ensured not to rise, the surface temperature of the welding gun is not more than 70 ℃ after the welding gun continuously operates for 45 hours in an environment higher than 600 ℃, and the welding gun is ensured not to be burnt out under long-time operation.
A bearing processing method applying a large-scale hydrostatic bearing processing device comprises the following specific steps:
(1) fixing a hydrostatic bearing 7 at the center of a circle 9 of a positioner, wherein the hydrostatic bearing is of a cylindrical structure, and when the positioner rotates, the hydrostatic bearing rotates along the axis of the hydrostatic bearing;
(2) arranging contacts 10 along the edge of a circular ring 9 of the positioner, determining the number and the positions of the contacts 10 according to the number and the positions of rectangular grooves of the hydrostatic bearing 7 to be machined, wherein the number of the contacts is equal to that of the rectangular grooves of the hydrostatic bearing, and the connecting line of each contact and the corresponding rectangular groove is intersected with the shaft of the hydrostatic bearing;
(3) adjusting the positioner 6 to enable the hydrostatic bearing 7 to be horizontal to the axis of the welding gun 3, and keeping the distance between the gun head and the inner wall of the hydrostatic bearing unchanged when the welding gun moves along the axis of the welding gun;
(4) adjusting the height of the pushing device 2 to enable the distance between the gun head 8 and the inner side wall of the hydrostatic bearing 7 to be the distance required by work;
(5) setting a time relay according to the rotating speed of the circular ring 9 of the positioner and the width of the rectangular groove of the hydrostatic bearing 7 to be processed, wherein the time relay controls the time interval from powder feeding stop to powder feeding restart of the plasma powder feeding device, and the powder feeding stop is to prevent a welding block from being formed in the rectangular groove of the hydrostatic bearing, so that the larger the width of the rectangular groove is, the larger the time interval from power-off to power-on restart of the time relay is, the slower the rotating speed of the circular ring of the positioner is, the larger the time interval from power-off to power-on restart of the time relay is, and vice versa;
(6) preheating the hydrostatic bearing 7 to prepare for surfacing;
(7) the inner side wall of the static pressure bearing 7 is subjected to surfacing welding by using the welding gun 3, the plasma powder feeding device 4 starts to feed powder, meanwhile, the positioner ring 9 starts to rotate, the pushing device 2 pushes the welding gun 3 to slowly move along the axial direction of the welding gun 3, and the surfacing welding path of the gun head 8 on the inner side wall of the static pressure bearing 7 is spiral;
(8) when the positioner ring 9 rotates, the positioner ring 9 drives the contact 10 to rotate, when the contact 10 moves to the position near the proximity switch 11, the proximity switch 11 sends a signal to a time relay, the time relay starts timing, meanwhile, the time relay sends a signal to the electromagnetic valve 5, the electromagnetic valve 5 closes a powder feeding pipe, the plasma powder feeding device 4 stops feeding powder to the welding gun 3, the welding gun 3 performs arc empty melting on the inner side wall of the hydrostatic bearing 7, the time relay sends a signal to the electromagnetic valve 5 after a period of time, the electromagnetic valve 5 opens the powder feeding pipe, the plasma powder feeding device 4 feeds powder to the welding gun 3 again, and the welding gun 3 starts surfacing again;
(9) the inner side wall of the static pressure bearing 7 after surfacing is milled, because the invention adopts interrupted surfacing during surfacing, and the plasma powder feeding device stops feeding powder when the gun head passes through the position of the rectangular groove, a thicker welding block formed by surfacing is not formed at the position of the rectangular groove, meanwhile, the periphery of the rectangular groove is not smooth, the rectangular groove needs to be milled first, and the rectangular groove is milled, because the welding block formed by surfacing in the rectangular groove area is less, the time for milling the groove is greatly reduced, meanwhile, the welding material is saved, and the processing efficiency can be improved by about 80% by adopting the invention;
(10) a panel made of the same material as the hydrostatic bearing 7 is placed in a rectangular groove on the inner side wall of the hydrostatic bearing 7;
(11) the inner side wall of the hydrostatic bearing 7 is turned, the thickness of overlaying is adjusted, the inner side wall of the hydrostatic bearing is turned, the thickness of overlaying is adjusted, the hydrostatic bearing after groove milling is directly turned in the turning process of the traditional technology, due to the existence of the rectangular groove, when a tool bit passes through the rectangular groove, a section of neutral space exists, the tool bit is easy to generate edge jumping, and the service life of the tool is short.
Claims (4)
1. The machining device for the large hydrostatic bearing is characterized by comprising a vertical operating rod (1), a plasma powder feeding device (4) and a position changing machine (6) used for fixing the hydrostatic bearing (7), wherein the vertical operating rod (1) is connected with a pushing device (2) in a sliding mode, the pushing device (2) is connected with a welding gun (3), the welding gun (3) comprises a gun head (8) and a gun body (12), the gun head (8) is located in the hydrostatic bearing (7), the plasma powder feeding device (4) is connected with the welding gun (3), the plasma powder feeding device (4) is provided with an electromagnetic valve (5) used for switching a powder feeding pipe, the position changing machine (6) comprises a position changing machine ring (9), a plurality of contacts (10) are arranged at the edge of the position changing machine ring (9), a proximity switch (11) is arranged near the edge of the position changing machine ring (9), the proximity switch (11) is electrically connected with a time relay, and the time relay is electrically connected with the electromagnetic valve (5);
the device comprises the following specific processing steps:
(1) fixing the hydrostatic bearing (7) at the circle center of the positioner ring (9);
(2) arranging contacts (10) along the edge of a positioner ring (9), and determining the number and the positions of the contacts (10) according to the number and the positions of rectangular grooves of a hydrostatic bearing (7) to be machined;
(3) adjusting the positioner (6) to enable the axial lines of the hydrostatic bearing (7) and the welding gun (3) to be horizontal;
(4) the height of the pushing device (2) is adjusted, so that the distance between the gun head (8) and the inner side wall of the hydrostatic bearing (7) is the distance required by work;
(5) setting a time relay according to the rotating speed of the positioner ring (9) and the width of a rectangular groove of the hydrostatic bearing (7) to be processed;
(6) preheating the hydrostatic bearing (7);
(7) the inner side wall of the hydrostatic bearing (7) is subjected to surfacing welding by using a welding gun (3), a plasma powder feeding device (4) starts to feed powder, a positioner ring (9) starts to rotate, a pushing device (2) pushes the welding gun (3) to slowly move along the axial direction of the welding gun (3), and a surfacing path of a gun head (8) on the inner side wall of the hydrostatic bearing (7) is spiral;
(8) when the positioner ring (9) rotates, the positioner ring (9) drives the contact (10) to rotate, when the contact (10) moves to the position near the proximity switch (11), the proximity switch (11) sends a signal to a time relay, the time relay starts timing, meanwhile, the time relay sends a signal to the electromagnetic valve (5), the electromagnetic valve (5) closes the powder feeding pipe, the plasma powder feeding device (4) stops feeding powder to the welding gun (3), the welding gun (3) performs arc melting on the inner side wall of the hydrostatic bearing (7), the time relay sends a signal to the electromagnetic valve (5) after a period of time, the electromagnetic valve (5) opens the powder feeding pipe, the plasma powder feeding device (4) feeds powder to the welding gun (3) again, and the welding gun (3) starts surfacing again;
(9) milling grooves in the inner side wall of the static pressure bearing (7) after overlaying;
(10) a panel made of the same material as the hydrostatic bearing (7) is placed in the rectangular groove on the inner side wall of the hydrostatic bearing (7);
(11) turning the inner side wall of the hydrostatic bearing (7) and adjusting the thickness of surfacing.
2. The processing device of the large hydrostatic bearing, according to claim 1, wherein the proximity switch (11) is located on the side of the positioner ring (9) close to the welding gun (3), and when the positioner ring (9) rotates, the distance between the proximity switch (11) and the contact (10) is 5 mm.
3. A large hydrostatic bearing machining device according to claim 1, characterized in that a positioning nut (19) is screwed on the vertical operating rod (1), and the positioning nut (19) abuts against the lower part of the pushing device (2).
4. A large hydrostatic bearing machining apparatus according to any one of claims 1, 2, or 3, it is characterized in that the welding gun (3) comprises a gun head (8) and a gun body (12), a gun head protective cover (13) matched with the gun head (8) is sleeved on the gun head (8), a gun body protective cover (14) matched with the gun body (12) is sleeved on the gun body (12), a cooling liquid flowing cavity (15) is arranged in the gun head protective cover (13) and the gun body protective cover (14), a cooling liquid circulating water tank (16) is arranged outside the gun body protective cover (14), a water inlet pipe (17) and a water outlet pipe (18) are arranged on the cooling liquid circulating water tank (16), the cooling liquid flowing cavities (15) are connected with a cooling liquid circulating water tank (16) through water inlet pipes (17), the cooling liquid flowing cavities (15) are connected with a cooling liquid circulating water tank (16) through water outlet pipes (18).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811307889.2A CN109570915B (en) | 2018-11-05 | 2018-11-05 | Machining device for large hydrostatic bearing and bearing machining method using machining device |
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| CN201811307889.2A CN109570915B (en) | 2018-11-05 | 2018-11-05 | Machining device for large hydrostatic bearing and bearing machining method using machining device |
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| CN109570915A CN109570915A (en) | 2019-04-05 |
| CN109570915B true CN109570915B (en) | 2021-01-12 |
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| CN114289928B (en) * | 2021-12-31 | 2023-05-12 | 武汉高力热喷涂工程有限责任公司 | Plasma surfacing method |
Citations (4)
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| DE102010026804A1 (en) * | 2010-07-10 | 2012-01-12 | Schaeffler Technologies Gmbh & Co. Kg | Bearing ring manufacturing method for swivel-joint roller bearing that is utilized in smithy, involves forming strip material portion and connecting annular elements to ends of butt joint based on external periphery of bearing ring |
| CN209453138U (en) * | 2018-11-05 | 2019-10-01 | 浙江富春江水电设备有限公司 | A kind of processing unit (plant) of large-scale hydrostatic bearing high in machining efficiency |
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| CN2083976U (en) * | 1990-12-26 | 1991-09-04 | 机械电子工业部哈尔滨焊接研究所 | Powdered plasma build-up welding gun |
| CN1147437A (en) * | 1995-08-08 | 1997-04-16 | 东芝机械株式会社 | Method and apparatus for cladding slide way of machine tool by welding |
| CN102091889A (en) * | 2010-11-27 | 2011-06-15 | 东方电气集团东方汽轮机有限公司 | Surfacing method and device |
| CN105382452A (en) * | 2015-12-23 | 2016-03-09 | 无锡三虹重工机械设备有限公司 | Pipe flange welding workstation |
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| CN109570915A (en) | 2019-04-05 |
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