CN201291421Y - Grinding machine static head frame capable of realizing accurate/ultra-accurate grinding - Google Patents
Grinding machine static head frame capable of realizing accurate/ultra-accurate grinding Download PDFInfo
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- CN201291421Y CN201291421Y CNU2008201593019U CN200820159301U CN201291421Y CN 201291421 Y CN201291421 Y CN 201291421Y CN U2008201593019 U CNU2008201593019 U CN U2008201593019U CN 200820159301 U CN200820159301 U CN 200820159301U CN 201291421 Y CN201291421 Y CN 201291421Y
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- sleeve
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Abstract
Disclosed is a hydrostatic headstock for a grinder, which can realize precise and super-precise grinding, comprising a sleeve, a headstock principal shaft, a support box, a headstock finial installed at the front end of the headstock principal shaft, and a headstock motor connected at the rear end of the headstock principal shaft. The sleeve is arranged on the support box; a front end cover is arranged at the front end of the sleeve; the front end and the back end of the headstock principal shaft are respectively supported on the sleeve through a front liquid hydrostatic bearing and a rear liquid hydrostatic bearing; liquid media are filled both between the front liquid hydrostatic bearing and the headstock principal shaft and between the rear liquid hydrostatic bearing and the headstock principal shaft; an anti-thrust shaft shoulder is arranged on the headstock principal shaft; a lap of gasket is sleeved on the anti-thrust shaft shoulder; both the anti-thrust shaft shoulder and the gasket are located between the front liquid hydrostatic bearing and the front end cover; a front-end clearance is left between the front end of the anti-thrust shaft shoulder and the front end cover; a back-end clearance is left between the rear end of the anti-thrust shaft shoulder and the front liquid hydrostatic bearing; and the front-end clearance and the back-end clearance are both filled with liquid media to form a liquid hydrostatic bearing. The headstock is good in rigidity, high in revolving precision, good in damping property and long in service life.
Description
Technical field
The utility model relates to mechanical manufacturing field, relates in particular to the grinding machine static pressure headstock that can realize the accurate ultra grinding.
Background technology
Accurate and superfine grinding is a key technology in the advanced machinery manufacturing technology field.Along with more and more higher to the requirement of part processing precision and working (machining) efficiency, in technology and industrial development direction that state key supports listed research and development accurate and the superfine grinding equipment by many in the world developed countries.Accurate and superfine grinding equipment is for the common process equipment, and is higher to the requirement of the rigidity of the rigidity of the rigidity of lathe bed, grinding wheel spindle and rotating accuracy, workpiece installation and rotating accuracy.
The grinding machine of domestic production at present, headstock spindle adopts the brasses sliding bearing of rolling bearing or thin oil lubricant as supporting member mostly, and all is to drive with belt transmissioning mode.Because belt transmission imports the vibration and the noise of driving-chain easily, has reduced transmission efficiency and main shaft precision, will add the influence that the drain charge device is offset the belt additional load at the spindle drive end usually.Rolling bearing is owing to the wearing and tearing that objectively exist between rolling element and the inner and outer ring, after the long-time running, the bearing clearance changes easily, thereby the headstock spindle that adopts roller bearings is when driving the workpiece rotation, can reduce the rotating accuracy of workpiece, thereby cause the surface profile precise decreasing of wheel grinding workpiece and surface roughness to increase.The brasses sliding bearing supporting construction of thin oil lubricant, because the supply and the oil return of thin oil are open fully, be difficult to form the oil film pressure of stable high rigidity, when thereby the headstock spindle that causes adopting the brasses sliding bearing supporting construction of thin oil lubricant drives the workpiece rotation, the rigidity of support of workpiece is lower, has influenced the raising of the surface quality of wheel grinding workpiece.Because there is above-mentioned defective in existing headstock spindle aspect two of supporting member and the kinds of drive, cause the rigidity of the grinding machine headstock less, rotating accuracy is lower, limited the further raising of existing grinding equipment machining accuracy.
The utility model content
The technical problems to be solved in the utility model is to overcome the deficiencies in the prior art, and the grinding machine static pressure headstock that a kind of good rigidly, rotating accuracy height, damping property are good, do not have the long accurate ultra the realized grinding of wearing and tearing, accuracy life is provided.
For solving the problems of the technologies described above, the utility model by the following technical solutions.
A kind of grinding machine static pressure headstock of realizing the accurate ultra grinding, comprise sleeve, headstock spindle, supporting box, the headstock motor that is connected in the headstock spindle rear end is top with the headstock that is installed in the headstock spindle front end, sleeve is installed on the supporting box, the rear end of sleeve is equiped with rear end cap, the front end of sleeve is equiped with drive end bearing bracket, the rear and front end of described headstock spindle is supported on the sleeve by preceding hydrodynamic journal liquid polymers and back hydrodynamic journal liquid polymers respectively, before hydrodynamic journal liquid polymers and back hydrodynamic journal liquid polymers all and be full of between the headstock spindle liquid medium is arranged, headstock spindle is provided with the thrust shaft shoulder, be with a circle pad on the thrust shaft shoulder, the described thrust shaft shoulder and pad are all between preceding hydrodynamic journal liquid polymers and drive end bearing bracket, leave preceding splaying between thrust shaft shoulder front end and the drive end bearing bracket, leave the splaying, back between thrust shaft shoulder rear end and the preceding hydrodynamic journal liquid polymers, be full of liquid medium in preceding splaying and the splaying, back and constitute the fluid pressure thrust bearing.
The rear end of described sleeve is equiped with rear end cap, and the headstock spindle rear end connects by shaft coupling headstock motor.
Described headstock spindle rear end is set in the rotor of headstock motor, and headstock motor is provided with flange near an end of sleeve, and the stator casing of headstock motor is fixed on the sleeve by flange.
Described sleeve is provided with preceding feed pathway, preceding back flow channel, back feed pathway, back back flow channel, liquid feeding channel and is located at the sleeve hole for back flow at sleeve middle part, described supporting box is provided with liquid storage cylinder, feed pathway and back feed pathway are communicated with liquid feeding channel respectively before described, and described preceding back flow channel, back back flow channel and sleeve hole for back flow all are communicated with liquid storage cylinder.
Hydrodynamic journal liquid polymers are provided with the first shaft orientation liquid feeding hole before described, first inlet opening radially, thrust front end inlet opening and thrust rear end inlet opening, the outer wall of preceding hydrodynamic journal liquid polymers is provided with the first feed liquor annular groove, the inwall of preceding hydrodynamic journal liquid polymers is provided with the first static pressure chamber, described pad is provided with through hole and hole for back flow, described drive end bearing bracket is provided with thrust front end delivery hole and drive end bearing bracket back flow channel, the first feed liquor annular groove, one end and preceding feed liquor channel connection, the other end through first radially inlet opening be communicated with the first static pressure chamber, the first shaft orientation liquid feeding hole with first radially inlet opening be communicated with, thrust front end inlet opening one end is communicated with the first shaft orientation liquid feeding hole, the other end is via through holes successively, thrust front end delivery hole is communicated with preceding splaying, thrust rear end inlet opening one end is communicated with the first shaft orientation liquid feeding hole, the other end is communicated with the splaying, back, and the drive end bearing bracket back flow channel is communicated with preceding back flow channel through hole for back flow.
Described back hydrodynamic journal liquid polymers are provided with second inlet opening radially, the outer wall of back hydrodynamic journal liquid polymers is provided with the second feed liquor annular groove, the inwall of back hydrodynamic journal liquid polymers is provided with the second static pressure chamber, the second feed liquor annular groove, one end and back feed liquor channel connection, the other end through second radially inlet opening be communicated with the second static pressure chamber.
Compared with prior art, advantage of the present utility model is: by preceding hydrodynamic journal liquid polymers, back hydrodynamic journal liquid polymers and fluid pressure thrust bearing have been realized the radial support and the axial support of fluid pressure formula, make the rotating accuracy height of headstock spindle, radial rigidity and axial rigidity improve, when driving the workpiece rotation, can make the corresponding raising of rotating accuracy of workpiece rotation, the ability of bearing grinding load strengthens, simultaneously, headstock spindle and preceding hydrodynamic journal liquid polymers, the static pressure deielectric-coating damping that forms between the back hydrodynamic journal liquid polymers is big, be very beneficial for reducing the vibration of workpiece spindle in the workpiece process, improve the workpiece spindle rotational stabilization, thereby help improving the surface profile machining accuracy and the workpiece surface quality of workpiece; Contactless wearing and tearing between headstock spindle and preceding hydrodynamic journal liquid polymers, the back hydrodynamic journal liquid polymers, accuracy life is long, reduces cost of equipment maintenance; Be with a circle pad on the thrust shaft shoulder of headstock spindle, the thrust shaft shoulder and pad are all between preceding hydrodynamic journal liquid polymers and drive end bearing bracket, by changing the pad of different-thickness, can adjust the size of preceding splaying and splaying, back, all very convenient to the debugging and the maintenance of fluid pressure thrust bearing.The headstock spindle rear end is passed through shaft coupling or directly is connected with headstock motor, can improve the rotating accuracy of transmission efficiency and whole main shaft like this, simultaneously can reduce equipment occupation space, minimizing equipment material, save when device fabrication cost, particularly headstock spindle are direct to be connected with headstock motor, electric motors function and headstock spindle function are combined together from structure, save complicated middle transmission link, had compact conformation, in light weight, advantage such as inertia is little, vibration is little, noise is low, response is fast.Set preceding back flow channel and back back flow channel are used for liquid medium is recycled to liquid storage cylinder on the sleeve, and the liquid medium in the liquid storage cylinder can be sent liquid supply box back to by other pipelines again, make the liquid medium can be recycling.Development of the present utility model and the use integral level that grinding is equipped for the lifting accurate ultra, and then advance the industrialization of high-grade numerically control grinder to have important practical value.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment 1;
Fig. 2 is the structural representation of the utility model embodiment 2;
Fig. 3 is the enlarged drawing at I place among Fig. 1.
Each label is represented among the figure:
1, sleeve 2, headstock spindle
3, headstock motor 4, the headstock are top
5, preceding hydrodynamic journal liquid polymers 6, back hydrodynamic journal liquid polymers
7, rear end cap 8, drive end bearing bracket
9, shaft coupling 10, supporting box
11, preceding feed pathway 12, preceding back flow channel
13, back feed pathway 14, back back flow channel
15, liquid feeding channel 16, liquid storage cylinder
17, sleeve hole for back flow 21, the thrust shaft shoulder
22, pad 31, rotor
32, stator casing 33, flange
50, the first annular groove static pressure chamber 51, the first feed liquor annular groove
52, the first static pressure chamber 53, the first shaft orientation liquid feeding hole
54, thrust front end inlet opening 55, thrust rear end inlet opening
56, first radially inlet opening 61, the second feed liquor annular groove
62, the second static pressure chamber 63, second inlet opening radially
81, thrust front end delivery hole 82, drive end bearing bracket back flow channel
83, the second annular groove static pressure chamber 211, preceding splaying
212, splaying 221, back, through hole
222, hole for back flow
The specific embodiment
Embodiment 1: as Fig. 1, shown in Figure 3, the grinding machine static pressure headstock of realizing the accurate ultra grinding of the present utility model, comprise sleeve 1, headstock spindle 2, supporting box 10, headstock motor 3 and the headstock top 4, the headstock top 4 is installed in headstock spindle 2 front ends, headstock motor 3 is directly connected in the rear end of headstock spindle 2 by shaft coupling 9, reach the minimizing equipment occupation space, reduce the purpose of equipment cost.The rear end of sleeve 1 is equiped with rear end cap 7, the front end of sleeve 1 is equiped with drive end bearing bracket 8, sleeve 1 is provided with preceding feed pathway 11, preceding back flow channel 12, back feed pathway 13, back back flow channel 14, liquid feeding channel 15 and is located at the sleeve hole for back flow 17 at sleeve 1 middle part, supporting box 10 is provided with liquid storage cylinder 16, preceding feed pathway 11 and back feed pathway 13 are communicated with liquid feeding channel 15 respectively, and preceding back flow channel 12, back back flow channel 14 and sleeve hole for back flow 17 all are communicated with liquid storage cylinder 16.Before back flow channel 12, back back flow channel 14 and sleeve hole for back flow 17 be used for fluid is recycled to liquid storage cylinder 16, send the fluid in the liquid storage cylinder 16 back to oil feeding reservoirs by other pipelines again, make the fluid can be recycling.The rear and front end of headstock spindle 2 is supported on the sleeve 1 by preceding hydrodynamic journal liquid polymers 5 and back hydrodynamic journal liquid polymers 6 respectively.
Preceding hydrodynamic journal liquid polymers 5 adopt interference fit to be installed in sleeve 1 front end, headstock spindle 2 is provided with the thrust shaft shoulder 21, be with a circle pad 22 on the thrust shaft shoulder 21, the thrust shaft shoulder 21 and pad 22 are all between preceding hydrodynamic journal liquid polymers 5 and drive end bearing bracket 8, the thickness of its Intermediate gasket 22 is greater than the thickness of the thrust shaft shoulder 21, pad 22 1 ends contact with preceding hydrodynamic journal liquid polymers 5, the other end contacts with drive end bearing bracket 8, leave preceding splaying 211 between the thrust shaft shoulder 21 front ends and the drive end bearing bracket 8, leave splaying 212, back between the thrust shaft shoulder 21 rear ends and the preceding hydrodynamic journal liquid polymers 5, be full of liquid medium in preceding splaying 211 and the splaying 212, back and constitute the fluid pressure thrust bearing, by changing the pad 22 of different-thickness, can adjust the size of preceding splaying 211 and splaying 212, back, all very convenient to the debugging and the maintenance of fluid pressure thrust bearing.
Drive end bearing bracket 8 is provided with thrust front end delivery hole 81 and drive end bearing bracket back flow channel 82, and with the thrust shaft shoulder 21 opposing end faces on be provided with the second annular groove static pressure chamber 83.Pad 22 is provided with through hole 221 and hole for back flow 222.Before hydrodynamic journal liquid polymers 5 be provided with the first shaft orientation liquid feeding hole 53, first radially inlet opening 56, thrust front end inlet opening 54 and thrust rear end inlet opening 55, the outer wall of preceding hydrodynamic journal liquid polymers 5 is provided with the first feed liquor annular groove 51, the inwall of preceding hydrodynamic journal liquid polymers 5 is provided with the first static pressure chamber 52, and preceding hydrodynamic journal liquid polymers 5 are provided with the first annular groove static pressure chamber 50 near the end face of the thrust shaft shoulders 21.Pad 22 is provided with through hole 221 and hole for back flow 222, drive end bearing bracket 8 is provided with thrust front end delivery hole 81 and drive end bearing bracket back flow channel 82, the first feed liquor annular groove, 51 1 ends are communicated with preceding feed pathway 11, the other end through first radially inlet opening 56 be communicated with the first static pressure chamber 52, the first shaft orientation liquid feeding hole 53 with first radially inlet opening 56 be communicated with, thrust front end inlet opening 54 1 ends are communicated with the first shaft orientation liquid feeding hole 53, the other end is via through holes 221 successively, thrust front end delivery hole 81 is communicated with preceding splaying 211, thrust rear end inlet opening 55 1 ends are communicated with the first shaft orientation liquid feeding hole 53, the other end is communicated with splaying 212, back, and drive end bearing bracket back flow channel 82 is communicated with preceding back flow channel 12 through hole for back flow 222.
Rear end cap 7 is provided with the rear end cap positioning boss, and rear end cap 7 is connected by this boss location and with sleeve 1, and back hydrodynamic journal liquid polymers 6 adopt interference fit to be installed in sleeve 1 rear end.Back hydrodynamic journal liquid polymers 6 are provided with second inlet opening 63 radially, the outer wall of back hydrodynamic journal liquid polymers 6 is provided with the second feed liquor annular groove 61, the inwall of back hydrodynamic journal liquid polymers 6 is provided with the second static pressure chamber 62, the second feed liquor annular groove, 61 1 ends with the back feed pathway 13 be communicated with, the other end through second radially inlet opening 63 be communicated with the second static pressure chamber 62.
Liquid medium by each radially inlet opening be filled into the static pressure chamber rapidly and form radial support static pressure deielectric-coating, headstock spindle 2 is suspended on this static pressure deielectric-coating, to headstock spindle 2 radial locations; Simultaneously, be filled into preceding splaying 211 and splaying 212, back rapidly, form axial support static pressure deielectric-coating in the thrust shaft shoulder 21 front and back by the thrust inlet opening, with this static pressure deielectric-coating to headstock spindle 2 axial location.
Adopt highly pressurised liquid lubricating oil as liquid medium in the present embodiment, the utility model is described in further detail below in conjunction with the route of flowing through of highly pressurised liquid lubricating oil in the utility model device.
The oily stream line of preceding hydrodynamic journal liquid polymers 5: highly pressurised liquid lubricating oil enters the preceding feed pathway 11 of sleeve 1 through a part of liquid feeding channel 15, the first feed liquor annular groove 51 before preceding feed pathway 11 enters on the hydrodynamic journal liquid polymers 5, and enter first inlet opening 56 radially through the first feed liquor annular groove 51, again by first radially inlet opening 56 enter the first static pressure chamber 52, form radial support static pressure oil film, headstock spindle 2 is suspended on this static pressure oil film, to headstock spindle 2 radial locations, and make headstock spindle 2 produce friction not and between the inwall of preceding hydrodynamic journal liquid polymers 5; Highly pressurised liquid lubricating oil in the first static pressure chamber 52 leaks from the both sides, front and back, directly get back to liquid storage cylinder 16 from the highly pressurised liquid lubricating oil that rear side leaks from the sleeve hole for back flow 17 of sleeve 1, the highly pressurised liquid lubricating oil that leaks from the front side is back to the preceding back flow channel 12 of sleeve 1 through hole for back flow 222, back flow channel 12 is back to liquid storage cylinder 16 in the past again, highly pressurised liquid lubricating oil in the liquid storage cylinder 16 can be sent oil feeding reservoirs back to by other pipelines again, make the fluid can be recycling, make from the fluid of the first static pressure chamber, 52 internal leakages and can constantly be replenished.
The oily stream line of fluid pressure thrust bearing: highly pressurised liquid lubricating oil enters the preceding feed pathway 11 of sleeve 1 through a part of liquid feeding channel 15, the first feed liquor annular groove 51 before preceding feed pathway 11 enters on the hydrodynamic journal liquid polymers 5, and enter first inlet opening 56 radially through the first feed liquor annular groove 51, again successively through the first shaft orientation liquid feeding hole 53, thrust front end inlet opening 54, through hole 221, enter the second annular groove static pressure chamber 83 behind the thrust front end delivery hole 81, fill up preceding splaying 211 again, another road enters the first annular groove static pressure chamber 50 by thrust rear end inlet opening 55, fill up splaying 212, back again, in preceding splaying 211 and splaying 212, back, form one deck axial support static pressure oil film respectively, to headstock spindle 2 axial location, and make the thrust shaft shoulder 21 not with preceding hydrodynamic journal liquid polymers 5, produce friction between the drive end bearing bracket 8; The fluid that release the past splaying 211 and splaying 212, back enters liquid storage cylinder 16 through hole for back flow 222, preceding back flow channel 12 successively, highly pressurised liquid lubricating oil in the liquid storage cylinder 16 can be sent oil feeding reservoirs back to by other pipelines again, make the fluid can be recycling, making in the past, the fluid of splaying 211 and back splaying 212 internal leakages can constantly be replenished.
The oily stream line of back hydrodynamic journal liquid polymers 6: a highly pressurised liquid lubricating oil part through liquid feeding channel 15 enter sleeve 1 after feed pathway 13, through after feed pathway 13 enter the second feed liquor annular groove 61 of back on the hydrodynamic journal liquid polymers 6, again through second radially inlet opening 63 enter the second static pressure chamber 62, form radial support static pressure oil film, headstock spindle 2 is suspended on this static pressure oil film, to headstock spindle 2 radial locations, and make headstock spindle 2 and between the inwall of back hydrodynamic journal liquid polymers 6 not produce friction; Highly pressurised liquid lubricating oil in the second static pressure chamber 62 leaks from the both sides, front and back, the highly pressurised liquid lubricating oil that leaks from the front side is directly got back to liquid storage cylinder 16 from the sleeve hole for back flow 17 of sleeve 1, after the flute profile reserve that the highly pressurised liquid lubricating oil that leaks from rear side forms through rear end cap 7 and sleeve 1 rear end enters a radial hole of sleeve 1 rear end, enter back back flow channel 14, be back to liquid storage cylinder 16 from back back flow channel 14 again, highly pressurised liquid lubricating oil in the liquid storage cylinder 16 can be sent oil feeding reservoirs back to by other pipelines again, make the fluid can be recycling, make from the fluid of the second static pressure chamber, 62 internal leakages and can constantly be replenished.
Embodiment 2: as shown in Figure 2, the grinding machine static pressure headstock of realizing the accurate ultra grinding of the present utility model, comprise sleeve 1, headstock spindle 2, supporting box 10, the headstock motor 3 and the headstock top 4, the headstock top 4 is installed in headstock spindle 2 front ends, headstock spindle 2 rear ends are set in the rotor 31 of headstock motor 3, headstock motor 3 is provided with flange 33 near an end of sleeve 1, the stator casing 32 of headstock motor 3 is fixed on the sleeve 1 by flange 33, the function of motor and the function of headstock spindle 2 are combined together from structure, save complicated middle transmission link, had compact conformation, in light weight, inertia is little, vibrate little, noise is low, respond advantages such as fast.The front end of sleeve 1 is equiped with drive end bearing bracket 8, sleeve 1 is provided with preceding feed pathway 11, preceding back flow channel 12, back feed pathway 13, back back flow channel 14, liquid feeding channel 15 and is located at the sleeve hole for back flow 17 at sleeve 1 middle part, supporting box 10 is provided with liquid storage cylinder 16, preceding feed pathway 11 and back feed pathway 13 are communicated with liquid feeding channel 15 respectively, and preceding back flow channel 12, back back flow channel 14 and sleeve hole for back flow 17 all are communicated with liquid storage cylinder 16.Before back flow channel 12, back back flow channel 14 and sleeve hole for back flow 17 be used for fluid is recycled to liquid storage cylinder 16, send the fluid in the liquid storage cylinder 16 back to oil feeding reservoirs by other pipelines again, make the fluid can be recycling.The rear and front end of headstock spindle 2 is supported on the sleeve 1 by preceding hydrodynamic journal liquid polymers 5 and back hydrodynamic journal liquid polymers 6 respectively.
Preceding hydrodynamic journal liquid polymers 5 adopt interference fit to be installed in sleeve 1 front end, headstock spindle 2 is provided with the thrust shaft shoulder 21, be with a circle pad 22 on the thrust shaft shoulder 21, the thrust shaft shoulder 21 and pad 22 are all between preceding hydrodynamic journal liquid polymers 5 and drive end bearing bracket 8, the thickness of its Intermediate gasket 22 is greater than the thickness of the thrust shaft shoulder 21, pad 22 1 ends contact with preceding hydrodynamic journal liquid polymers 5, the other end contacts with drive end bearing bracket 8, leave preceding splaying 211 between the thrust shaft shoulder 21 front ends and the drive end bearing bracket 8, leave splaying 212, back between the thrust shaft shoulder 21 rear ends and the preceding hydrodynamic journal liquid polymers 5, be full of liquid medium in preceding splaying 211 and the splaying 212, back and constitute the fluid pressure thrust bearing, by changing the pad 22 of different-thickness, can adjust the size of preceding splaying 211 and splaying 212, back, all very convenient to the debugging and the maintenance of fluid pressure thrust bearing.
Drive end bearing bracket 8 is provided with thrust front end delivery hole 81 and drive end bearing bracket back flow channel 82, and with the thrust shaft shoulder 21 opposing end faces on be provided with the second annular groove static pressure chamber 83.Pad 22 is provided with through hole 221 and hole for back flow 222.Before hydrodynamic journal liquid polymers 5 be provided with the first shaft orientation liquid feeding hole 53, first radially inlet opening 56, thrust front end inlet opening 54 and thrust rear end inlet opening 55, the outer wall of preceding hydrodynamic journal liquid polymers 5 is provided with the first feed liquor annular groove 51, the inwall of preceding hydrodynamic journal liquid polymers 5 is provided with the first static pressure chamber 52, and preceding hydrodynamic journal liquid polymers 5 are provided with the first annular groove static pressure chamber 50 near the end face of the thrust shaft shoulders 21.Pad 22 is provided with through hole 221 and hole for back flow 222, drive end bearing bracket 8 is provided with thrust front end delivery hole 81 and drive end bearing bracket back flow channel 82, the first feed liquor annular groove, 51 1 ends are communicated with preceding feed pathway 11, the other end through first radially inlet opening 56 be communicated with the first static pressure chamber 52, the first shaft orientation liquid feeding hole 53 with first radially inlet opening 56 be communicated with, thrust front end inlet opening 54 1 ends are communicated with the first shaft orientation liquid feeding hole 53, the other end is via through holes 221 successively, thrust front end delivery hole 81 is communicated with preceding splaying 211, thrust rear end inlet opening 55 1 ends are communicated with the first shaft orientation liquid feeding hole 53, the other end is communicated with splaying 212, back, and drive end bearing bracket back flow channel 82 is communicated with preceding back flow channel 12 through hole for back flow 222.
Liquid medium by each radially inlet opening be filled into the static pressure chamber rapidly and form radial support static pressure deielectric-coating, headstock spindle 2 is suspended on this static pressure deielectric-coating, to headstock spindle 2 radial locations; Simultaneously, be filled into preceding splaying 211 and splaying 212, back rapidly, form axial support static pressure deielectric-coating in the thrust shaft shoulder 21 front and back by the thrust inlet opening, with this static pressure deielectric-coating to headstock spindle 2 axial location.
Fluid flow path route in the present embodiment is substantially the same manner as Example 1, after difference only is that the highly pressurised liquid lubricating oil that leaks from the second static pressure chamber, 62 rear sides enters the radial hole of rear end of sleeve 1 through the flute profile reserve of flange 33 and sleeve 1 assembling back formation, return back flow channel 14, be back to liquid storage cylinder 16 from back back flow channel 14 again.
The utility model is by preceding hydrodynamic journal liquid polymers 5, back hydrodynamic journal liquid polymers 6 and fluid pressure thrust bearing have been realized radial support and the axial support to the fluid pressure formula of headstock spindle 2, make the rotating accuracy height of headstock spindle 2, radial rigidity and axial rigidity improve, when driving the workpiece rotation, can make the corresponding raising of rotating accuracy of workpiece rotation, the ability of bearing grinding load strengthens, simultaneously, headstock spindle 2 and preceding hydrodynamic journal liquid polymers 5, the static pressure oil-film damping that forms between the back hydrodynamic journal liquid polymers 6 is big, be very beneficial for reducing the vibration of workpiece spindle in the workpiece process, improve the workpiece spindle rotational stabilization, thereby help improving the surface profile machining accuracy and the workpiece surface quality of workpiece; Contactless wearing and tearing between headstock spindle 2 and preceding hydrodynamic journal liquid polymers 5, back hydrodynamic journal liquid polymers 6 and the drive end bearing bracket 8, accuracy life is long, reduces cost of equipment maintenance; Development of the present utility model and the use integral level that grinding is equipped for the lifting accurate ultra, and then advance the industrialization of high-grade numerically control grinder to have important practical value.
Claims (7)
1, a kind of grinding machine static pressure headstock of realizing the accurate ultra grinding, comprise sleeve (1), headstock spindle (2), supporting box (10), be connected in the headstock motor (3) of headstock spindle (2) rear end and be installed in the headstock top (4) of headstock spindle (2) front end, sleeve (1) is installed on the supporting box (10), the rear end of sleeve (1) is equiped with rear end cap (7), the front end of sleeve (1) is equiped with drive end bearing bracket (8), it is characterized in that: the rear and front end of described headstock spindle (2) is supported on the sleeve (1) by preceding hydrodynamic journal liquid polymers (5) and back hydrodynamic journal liquid polymers (6) respectively, before hydrodynamic journal liquid polymers (5) and afterwards hydrodynamic journal liquid polymers (6) are all and be full of between the headstock spindle (2) liquid medium is arranged, headstock spindle (2) is provided with the thrust shaft shoulder (21), be with a circle pad (22) on the thrust shaft shoulder (21), the described thrust shaft shoulder (21) and pad (22) all are positioned between preceding hydrodynamic journal liquid polymers (5) and the drive end bearing bracket (8), leave preceding splaying (211) between the thrust shaft shoulder (21) front end and the drive end bearing bracket (8), leave splaying (212), back between the thrust shaft shoulder (21) rear end and the preceding hydrodynamic journal liquid polymers (5), be full of liquid medium in preceding splaying (211) and the splaying, back (212) and constitute the fluid pressure thrust bearing.
2, the grinding machine static pressure headstock of realizing the accurate ultra grinding according to claim 1, it is characterized in that: the rear end of described sleeve (1) is equiped with rear end cap (7), and headstock spindle (2) rear end connects by shaft coupling (9) headstock motor (3).
3, the grinding machine static pressure headstock of realizing the accurate ultra grinding according to claim 1, it is characterized in that: described headstock spindle (2) rear end is set in the rotor (31) of headstock motor (3), headstock motor (3) is provided with flange (33) near an end of sleeve (1), and the stator casing (32) of headstock motor (3) is fixed on the sleeve (1) by flange (33).
4, according to each described grinding machine static pressure headstock of realizing the accurate ultra grinding in the claim 1 to 3, it is characterized in that: described sleeve (1) is provided with preceding feed pathway (11), preceding back flow channel (12), back feed pathway (13), back back flow channel (14), liquid feeding channel (15) and be located at the sleeve hole for back flow (17) at sleeve (1) middle part, described supporting box (10) is provided with liquid storage cylinder (16), feed pathway (11) and back feed pathway (13) are communicated with liquid feeding channel (15) respectively before described, described preceding back flow channel (12), back back flow channel (14) and sleeve hole for back flow (17) all are communicated with liquid storage cylinder (16).
5, the grinding machine static pressure headstock of realizing the accurate ultra grinding according to claim 4, it is characterized in that: hydrodynamic journal liquid polymers (5) are provided with the first shaft orientation liquid feeding hole (53) before described, first inlet opening (56) radially, thrust front end inlet opening (54) and thrust rear end inlet opening (55), the outer wall of preceding hydrodynamic journal liquid polymers (5) is provided with the first feed liquor annular groove (51), the inwall of preceding hydrodynamic journal liquid polymers (5) is provided with the first static pressure chamber (52), described pad (22) is provided with through hole (221) and hole for back flow (222), described drive end bearing bracket (8) is provided with thrust front end delivery hole (81) and drive end bearing bracket back flow channel (82), the first feed liquor annular groove (51) one ends are communicated with preceding feed pathway (11), the other end through first radially inlet opening (56) be communicated with the first static pressure chamber (52), the first shaft orientation liquid feeding hole (53) with first radially inlet opening (56) be communicated with, thrust front end inlet opening (54) one ends are communicated with the first shaft orientation liquid feeding hole (53), the other end is via through holes (221) successively, thrust front end delivery hole (81) is communicated with preceding splaying (211), inlet opening (55) one ends in thrust rear end are communicated with the first shaft orientation liquid feeding hole (53), the other end is communicated with splaying, back (212), and drive end bearing bracket back flow channel (82) is communicated with preceding back flow channel (12) through hole for back flow (222).
6, the grinding machine static pressure headstock of realizing the accurate ultra grinding according to claim 4, it is characterized in that: described back hydrodynamic journal liquid polymers (6) are provided with second inlet opening (63) radially, the outer wall of back hydrodynamic journal liquid polymers (6) is provided with the second feed liquor annular groove (61), the inwall of back hydrodynamic journal liquid polymers (6) is provided with the second static pressure chamber (62), the second feed liquor annular groove (61) one ends with the back feed pathway (13) be communicated with, the other end through second radially inlet opening (63) be communicated with the second static pressure chamber (62).
7, the grinding machine static pressure headstock of realizing the accurate ultra grinding according to claim 5, it is characterized in that: described back hydrodynamic journal liquid polymers (6) are provided with second inlet opening (63) radially, the outer wall of back hydrodynamic journal liquid polymers (6) is provided with the second feed liquor annular groove (61), the inwall of back hydrodynamic journal liquid polymers (6) is provided with the second static pressure chamber (62), the second feed liquor annular groove (61) one ends with the back feed pathway (13) be communicated with, the other end through second radially inlet opening (63) be communicated with the second static pressure chamber (62).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201593019U CN201291421Y (en) | 2008-11-19 | 2008-11-19 | Grinding machine static head frame capable of realizing accurate/ultra-accurate grinding |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2008201593019U CN201291421Y (en) | 2008-11-19 | 2008-11-19 | Grinding machine static head frame capable of realizing accurate/ultra-accurate grinding |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102001000A (en) * | 2010-11-26 | 2011-04-06 | 威海华东数控股份有限公司 | Hydrostatic support |
| CN103543011A (en) * | 2013-10-11 | 2014-01-29 | 华中科技大学 | Static-pressure bearing test stand |
| CN104029119A (en) * | 2014-06-04 | 2014-09-10 | 湖南海捷主轴科技有限公司 | Workhead hydrostatic spindle of bearing ring grinder |
| CN106425844B (en) * | 2016-06-27 | 2019-03-08 | 德清勤龙磨床制造有限公司 | Back cone formula sleeve static pressure high-speed main shaft bistrique |
| CN110315433A (en) * | 2019-07-24 | 2019-10-11 | 马鞍山市恒利达机械刀片有限公司 | A kind of mandrel antidumping unit |
-
2008
- 2008-11-19 CN CNU2008201593019U patent/CN201291421Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102001000A (en) * | 2010-11-26 | 2011-04-06 | 威海华东数控股份有限公司 | Hydrostatic support |
| CN103543011A (en) * | 2013-10-11 | 2014-01-29 | 华中科技大学 | Static-pressure bearing test stand |
| CN103543011B (en) * | 2013-10-11 | 2016-04-13 | 华中科技大学 | A kind of hydrostatic support testing table |
| CN104029119A (en) * | 2014-06-04 | 2014-09-10 | 湖南海捷主轴科技有限公司 | Workhead hydrostatic spindle of bearing ring grinder |
| CN106425844B (en) * | 2016-06-27 | 2019-03-08 | 德清勤龙磨床制造有限公司 | Back cone formula sleeve static pressure high-speed main shaft bistrique |
| CN110315433A (en) * | 2019-07-24 | 2019-10-11 | 马鞍山市恒利达机械刀片有限公司 | A kind of mandrel antidumping unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090819 Effective date of abandoning: 20081119 |