CN114559221A - Processing method of front sleeve in air static pressure electric spindle system - Google Patents
Processing method of front sleeve in air static pressure electric spindle system Download PDFInfo
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- CN114559221A CN114559221A CN202210250471.2A CN202210250471A CN114559221A CN 114559221 A CN114559221 A CN 114559221A CN 202210250471 A CN202210250471 A CN 202210250471A CN 114559221 A CN114559221 A CN 114559221A
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- phi
- inner hole
- grinding
- sleeve
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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
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
- B24B5/04—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
- B24B5/06—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces internally
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
The invention provides a processing method of a front sleeve in an air static pressure electric spindle system, and relates to the technical field of air static pressure electric spindles. The method comprises the steps of adopting a phi 85 martensitic stainless steel blank; roughly turning the outer circle and the inner hole of the part, and leaving a single-side finish machining allowance of 1 mm; carrying out quenching and tempering to enhance the comprehensive mechanical property of the workpiece; carrying out external circle and inner hole finish turning, and reserving grinding allowance of 0.2 mm; performing oil boiling qualitative treatment, heating to 120-; grinding phi 36 by using special tool
An inner hole reference; at phi 36
Description
Technical Field
The invention relates to the technical field of air static pressure electric spindles, in particular to a processing method of a front sleeve in an air static pressure electric spindle system.
Background
The high-speed air static pressure main shaft is an electromechanical integrated functional component which directly depends on static pressure gas bearing technology, motor design and manufacture, high-speed driving technology and rotator vibration control technology, and its principle is mainly that the electric main shaft is supported by static pressure gas bearing, the thrust bearing bears axial load, the shaft diameter bearing bears radial load, and is driven by frequency conversion motor, so that it can implement zero transmission of main shaft system.
The front sleeve is used as a supporting and positioning part of the aerostatic bearing and is a key core part of an aerostatic motorized spindle system, the machining precision of the front sleeve directly affects the operation function and efficiency of the motorized spindle, and the machining precision of the front sleeve is difficult to guarantee only by alignment and the precision of a machine tool, so that a machining method capable of producing the high-precision front sleeve is urgently needed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a processing method of a front sleeve in an air static pressure electric spindle system, which aims to solve the problems that the grinding inner hole of the front sleeve in the static pressure electric spindle system is difficult to clamp due to irregular appearance and the positioning of the inner hole and the reference positioning during grinding the outer circle during processing, so as to meet the dimensional tolerance and the form and position precision of each item required by a drawing and further ensure that the whole electric spindle system reaches the precision of each form and position required by the drawing.
In order to achieve the purpose, the invention is realized by the following technical scheme: a processing method of a front sleeve in an air static pressure electric spindle system comprises the steps of grinding an inner hole by using a special tool, grinding an outer circle by using the inner hole as a reference by combining a special conical plug, and specifically comprises the following processing steps:
A. adopting a phi 85 martensitic stainless steel blank;
B. roughly turning the outer circle and the inner hole of the part, and leaving a single-side finish machining allowance of 1 mm;
C. carrying out quenching and tempering to enhance the comprehensive mechanical property of the workpiece;
D. carrying out external circle and inner hole finish turning, and reserving grinding allowance of 0.2 mm;
E. after the threaded hole on the outer surface is processed by using a vertical processing center, oil boiling qualitative treatment is carried out, and the temperature is maintained for 12 hours at the temperature of 120-;
F. grinding phi 36 by using special tool
The inner hole is used as a reference, and the requirements on the size, roundness and roughness of the hole are met;
G. at phi 36
The hole is taken as a reference, a tool is designed to be conical and blocked, and the excircle phi 70 is finely ground
Ensure the axis of the excircle and phi 36
The coaxiality tolerance of the axis of the inner hole is phi 0.008.
Preferably, in the step B, all the outer circles and the inner holes are left with single-side finishing allowance of 1 mm.
Preferably, the heating temperature of the thermal refining treatment in the step C is 1000-1050 ℃, the cooling is carried out in oil, and the tempering is 600-700 ℃.
Preferably, in the step D, all the outer circles and the inner holes are left with single-side finish machining allowance of 0.2 mm.
Preferably, in step E, oil boiling qualitative treatment is performed, and the mixture is heated to 130-135 ℃ and is kept for 12 hours.
Preferably, grinding Φ 36 in step F
The special tool for the inner hole comprises a base, a sleeve, a front bearing, a rear bearing, a front bearing gland, a rear bearing gland and a jackscrew, wherein the base is fixed on a guide rail of a bed of the internal grinding machine through a bottom flat plate by a hexagon socket head cap screw, the center distance between a support hole at two ends of the base and the bottom surface is designed to be the elevation of the center distance between the main shaft of the internal grinding machine and the guide rail surface of the grinding machine, and the two holes are respectively connected with the front bearing and the rear shaftThe outer ring interference fit that holds, the inner circle of front bearing and rear bearing and the telescopic both ends step external diameter and the terminal surface interference fit of centre, the grinding machine main shaft drives the sleeve rotation in the anchor clamps through the heart of a chicken clamp, and the work piece leans on 3 jackscrews to compress tightly and rotates along with the main shaft on the sleeve inner wall, and the front bearing gland at sleeve both ends and rear bearing gland play the effect of sealed front bearing and rear bearing respectively.
Preferably, the tool conical plug structure in the step G consists of a nut, a gasket, a left conical plug, a workpiece and a right conical plug, the workpiece is in interference contact positioning with the left conical plug and the right conical plug by a small taper of 1:2500, the nut and the gasket are not assembled temporarily when an excircle is ground, and only the left conical plug and the right conical plug are slowly pressed into phi 36 of the workpiece
Two tops on two sides of the inner hole are clamped and ground to grind the excircle, and because the workpiece is in interference fit with the small taper of 1:2500 of the taper plugs on the two sides, no gap exists, the grinding effectively ensures that the inner hole phi is 36
With the outer circle phi of 70
The coaxiality tolerance is phi 0.008, the gasket and the nut are assembled when the conical plug is disassembled after machining is finished, the nut is screwed in to take out the left conical plug, and then the plastic rod is used for ejecting the right conical plug.
The invention provides a processing method of a front sleeve in an air static pressure electric spindle system. The method has the following beneficial effects:
the invention grinds the inner hole by using a special tool firstly through selection of a blank, formulation of a process route, design of a tool, selection of processing equipment and a cutter, grinds the outer circle by using the special taper plug and combining the inner hole as a reference, and finally obtains good effect.
Drawings
FIG. 1 is a schematic structural view of an inner hole grinding tool of the present invention;
FIG. 2 is a schematic structural view of a two-side conical plug tool of the present invention;
FIG. 3 is a combined machining drawing of the left and right conical plugs of the invention
FIG. 4 is a drawing of a part processed according to the present invention.
Wherein, 1, a sleeve; 2. a front bearing gland; 3. a base; 4. a front bearing; 5. carrying out top thread; 6. a rear bearing; 7. a rear bearing gland; 8. a nut; 9. a workpiece; 10. right cone blocking; 11. a gasket; 12. and (5) plugging a left cone.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
as shown in fig. 1-4, an embodiment of the present invention provides a method for processing a front sleeve in an aerostatic motorized spindle system, which includes steps of grinding an inner hole by using a special tool, grinding an outer circle by using a special taper plug as a reference with the inner hole, and specifically includes the following steps:
adopting a phi 85 martensitic stainless steel blank;
roughly turning the outer circle and the inner hole of the part, and leaving a single-side finish machining allowance of 1 mm;
carrying out quenching and tempering to enhance the comprehensive mechanical property of the workpiece;
carrying out fine turning on the outer circle and the inner hole, and reserving grinding allowance of 0.2 mm;
after the threaded hole on the outer surface is processed by using a vertical processing center, oil boiling qualitative treatment is carried out, and the temperature is maintained for 12 hours at the temperature of 120-;
grinding phi 36 by using special tool
The inner hole standard, guarantee the size, roundness and roughness requirement of the hole, as shown in figure 1, the frock clamp is composed of 8 parts including a base 3, a sleeve 1, a front bearing 4, a rear bearing 6, a front bearing gland 2, a rear bearing gland 7 and a jackscrew 5, the base 3 is fixed on a guide rail of a bed of an internal grinding machine through a bottom flat plate by an internal hexagonal screw, the center distance between a support hole at two ends and the bottom surface of the base 3 is designed to be the elevation of the center of the main shaft of the internal grinding machine from the guide rail surface of the grinding machine, two holes are respectively in interference fit with the outer rings of two precise ball bearings, the inner rings of the two precise bearings are in interference fit with the outer diameter and the end surface of a step at two ends of a middle sleeve, the main shaft of the grinding machine drives the sleeve in a clamp to rotate through a chicken heart hoop, a workpiece is pressed on the inner wall of the sleeve 1 by 3 jackscrews 5 to rotate together with the main shaft, the front bearing gland 2 and the rear bearing gland 7 at two ends of the sleeve 1 respectively play the role of sealing the front bearing 4 and the rear bearing 6, scrap iron and other impurities in the grinding process are prevented from entering the ball bearing. During specific operation, the hole diameters of the supporting holes at the two ends of the base 3 and the outer ring of the selected precise ball bearing are matched and ground to be in interference fit with the interference magnitude of 0.005mm, the outer diameter and the end face of the step circle at the two ends of the supporting sleeve and the inner ring of the selected precise ball bearing are matched and ground to be 0.005mm in interference magnitude, and finally the bearing covers are installed at the two ends of the supporting sleeve and fastened by screws. The assembled tool clamp is placed on a guide rail of an internal grinding machine, the deviation between the center height of a middle hole of a sleeve and the elevation of the center of a main shaft of the internal grinding machine from the guide rail surface of the grinding machine is adjusted to be within 0.01mm by a dial indicator, meanwhile, a bus of the middle hole of the sleeve is aligned to ensure that the deviation between the center of the middle hole of the sleeve and the center of the main shaft of the grinding machine is within 0.01mm, then a base 3 is fixed on a guide rail of a machine body by an internal hexagonal screw, an inner hole in the middle of the positioning of the sleeve and the positioning excircle of a workpiece are matched and ground, the gap is about 0.02mm, finally, the excircle of the workpiece is inserted into the inner hole of the sleeve, the end surface of a step circle of the workpiece is axially positioned, and the workpiece is fastened by 3 jackscrew screws, so that the two ends of the workpiece can be clamped and ground with form and position tolerance inner holes 36 phi, step holes 39 and end surfaces at two ends to ensure the form and position tolerance of a drawing.
At phi 36
The hole is taken as a reference, a tool is designed to be conical and blocked, and the excircle phi 70 is finely ground
Ensure the axis of the excircle and phi 36
The coaxiality tolerance of the axis of the inner hole is phi 0.008, as shown in figure 2, the structure consists of a nut 8, a gasket 11, a left conical plug 12, a workpiece 9 and a right conical plug 10, the workpiece 9 and the conical plugs at two sides (the right conical plug 10 and the left conical plug 12) are in interference contact positioning by a small taper of 1:2500, the nut 8 and the gasket 11 are not assembled temporarily (the nut 8 and the gasket 11 are dismounting devices) during grinding of the outer circle, only the left conical plug 12 and the right conical plug 10 are slowly pressed into two sides of the inner hole of the workpiece phi 36, and the outer circle is ground by clamping and clamping two centers, and because the workpiece and the small taper of the conical plugs at two sides 1:2500 are in interference contact fit without gaps, the coaxiality tolerance of the inner hole phi 36 and the outer circle 70 is effectively guaranteed to be phi 0.008 after grinding. After the processing is finished, when the conical plug is disassembled, the gasket 11 and the nut 8 are assembled, the nut is screwed in to take the left conical plug 12 out, and then the right conical plug 10 is ejected out by a plastic rod. When the two-end taper plugs are machined, in order to ensure that two tip holes of the taper plugs are coaxial with the central line of the inner hole of the part, a combined machining method shown in a figure 3 is adopted, the figure is a combined machining diagram of the left taper plug and the right taper plug, the combined machining is to ensure that the two tip holes are coaxial and collinear with the central line of the inner hole of the part, and after the taper combination grinding at the two sides is finished, the two consistent left taper plugs and the right taper plugs are cut off by linear cutting at the perpendicular bisector to form two consistent left taper plugs and right taper plugs.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A processing method of a front sleeve in an air static pressure electric spindle system is characterized by comprising the following steps: firstly, grinding an inner hole by using a special tool, then grinding an excircle by using the inner hole as a reference through special conical plug combination, and specifically processing the excircle by using the following steps:
A. adopting a phi 85 martensitic stainless steel blank;
B. roughly turning the outer circle and the inner hole of the part, and leaving a single-side finish machining allowance of 1 mm;
C. carrying out quenching and tempering to enhance the comprehensive mechanical property of the workpiece;
D. carrying out external circle and inner hole finish turning, and reserving grinding allowance of 0.2 mm;
E. after the threaded hole on the outer surface is processed by using a vertical processing center, oil boiling qualitative treatment is carried out, and the temperature is maintained for 12 hours at the temperature of 120-;
F. grinding phi 36 by using special tool
The inner hole is used as a reference, and the requirements on the size, roundness and roughness of the hole are met;
G. at phi 36
The hole is taken as a reference, a tool is designed to be conical and blocked, and the excircle phi 70 is finely ground
Ensure the axis of the excircle and phi 36
The coaxiality tolerance of the axis of the inner hole is phi 0.008.
2. The processing method for the front sleeve in the aerostatic electric spindle system according to claim 1, characterized in that: and D, reserving single-side finish machining allowance of all the outer circles and the inner holes in the step B, wherein the allowance is 1 mm.
3. The processing method of the front sleeve in the aerostatic electric spindle system according to claim 1, characterized in that: and C, quenching and tempering at the heating temperature of 1000-1050 ℃, cooling in oil and tempering at the temperature of 600-700 ℃.
4. The processing method of the front sleeve in the aerostatic electric spindle system according to claim 1, characterized in that: d, reserving single faces of the outer circles and the inner holes, and finishing allowance of the outer circles and the inner holes to be 0.2 mm.
5. The processing method of the front sleeve in the aerostatic electric spindle system according to claim 1, characterized in that: in step E, oil boiling qualitative treatment is carried out, and the mixture is heated to 130-135 ℃ and is kept for 12 hours.
6. The processing method of the front sleeve in the aerostatic electric spindle system according to claim 1, characterized in that: grinding of phi 36 in step F
Special inner hole tool, which comprises a base (3), a sleeve (1), a front bearing (4), a rear bearing (6), a front bearing gland (2), a rear bearing gland (7) and a jackscrew (5), wherein the base (3) is fixed on a guide rail of a bed of an internal grinding machine through a bottom flat plate by an inner hexagonal screw, the center distance between a support hole at two ends of the base (3) and the bottom surface is designed to be the elevation of the center distance between a main shaft of the internal grinding machine and the guide rail surface of the grinding machine, the two holes are respectively in interference fit with the outer rings of the front bearing (4) and the rear bearing (6), the inner rings of the front bearing (4) and the rear bearing (6) and the outer diameters and the end surfaces of two end steps of the sleeve (1) in the middle are in interference fit, the main shaft of the grinding machine drives the sleeve (1) in a clamp to rotate through a chicken heart hoop, a workpiece is pressed on the inner wall of the sleeve (1) by the 3 jackscrews (5) to rotate together with the main shaft, the front bearing gland (2) and the rear bearing gland (7) at two ends of the sleeve (1) respectively play a role in sealing the front bearing (4) and the rear bearing (7) The bearing (6) functions.
7. The processing method of the front sleeve in the aerostatic electric spindle system according to claim 1, characterized in that: the tool cone block structure in the step G consists of a nut (8), a gasket (11), a left cone block (12), a workpiece (9) and a right cone block (10)The workpiece (9) is in interference contact with the left conical plug (12) and the right conical plug (10) by a taper of 1:2500 for positioning, the nut (8) and the gasket (11) are not assembled temporarily when grinding an excircle, and only the left conical plug (12) and the right conical plug (10) are slowly pressed into phi 36 of the workpiece
Two tops on two sides of the inner hole are clamped and ground to grind the excircle, and because the workpiece is in interference fit with the small taper of 1:2500 of the taper plugs on the two sides, no gap exists, the grinding effectively ensures that the inner hole phi is 36
With the outer circle phi of 70
The coaxiality tolerance of the right conical plug is phi 0.008, the gasket (11) and the nut (8) are assembled when the conical plug is disassembled after machining is finished, the nut (8) is screwed in to take out the left conical plug (12), and the right conical plug (10) is ejected out by a plastic rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210250471.2A CN114559221B (en) | 2022-03-15 | 2022-03-15 | Processing method of front sleeve in air static pressure electric spindle system |
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| CN202210250471.2A CN114559221B (en) | 2022-03-15 | 2022-03-15 | Processing method of front sleeve in air static pressure electric spindle system |
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| CN114559221B CN114559221B (en) | 2023-04-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115415747A (en) * | 2022-09-19 | 2022-12-02 | 四川精控阀门制造有限公司 | Machining method for overlaying ball body of forced sealing ball valve |
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| CN115415747B (en) * | 2022-09-19 | 2024-01-26 | 四川精控阀门制造有限公司 | Processing method of surfacing ball body of forced sealing ball valve |
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