CN203875355U - Special center for machining outer cylinder of impacter - Google Patents
Special center for machining outer cylinder of impacter Download PDFInfo
- Publication number
- CN203875355U CN203875355U CN201420322066.8U CN201420322066U CN203875355U CN 203875355 U CN203875355 U CN 203875355U CN 201420322066 U CN201420322066 U CN 201420322066U CN 203875355 U CN203875355 U CN 203875355U
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- Prior art keywords
- hole
- fixed connection
- connection shaft
- supporting seat
- thrust bearing
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Abstract
A special center for machining an outer cylinder of an impacter comprises a fixed connecting shaft and a supporting base. The supporting base is composed of a cylindrical segment and a conical segment. The big end of the conical segment is connected with the front end of the cylindrical segment, four stepped holes are formed in the center of the rear end face of the supporting base in the axial direction from rear to front and are blind holes, two stepped shaft parts of the fixed connecting shaft are provided with a single-row angular contact bearing and a one-way thrust ball bearing respectively, the single-row angular contact bearing is assembled in the second hole of the supporting base, the one-way thrust ball bearing is assembled in the third hole of the supporting base, threads are arranged on the inner wall of the first hole of the supporting base, and a gland matched with the rear end of the single-row angular contact bearing in a pressed mode is connected in the first hole of the supporting base through threads. The special center for machining the outer cylinder of the impacter is reasonable in design and simple in structure, the problem that manpower is wasted because repeated disassembly is needed in the machining process is solved, the center is high in clamping precision, good in universality and long in service life, production efficiency is greatly improved, and product quality consistency is guaranteed.
Description
Technical field
The utility model belongs to machining manufacturing technology field, relates in particular to a kind of impactor outer shell processing center special.
Background technology
Down-hole hammer impactor can be used for exploration, earth and rock works, mining boring and oil drilling field, has brought into play huge effect.The outer cylinder structure of down-hole hammer impactor is elongated thin-walled parts (wall thickness 10mm, length 1000mm).Processing technology, for first carrying out roughing on lathe, is carried out fine finishining by grinding machine again after Overheating Treatment.No matter be roughing or fine finishining process, clamping all needs the top auxiliary clamping that carries out behind location.
Top is machine tool component in machining, has two kinds of stationary center and rolling centers.Stationary center can and not allow the part of centering to support to the part of end face complexity.Toply mainly by thimble, clamping device, housing, steady pin, bearing and mandrel, formed.Top one end can top centre bore or the endoporus of materials in the tube, and the other end can top end face be spherical or the part of taper, toply by clamping device, is fixed.When part does not allow or cannot centering, available clamping device is directly clamped turning.Housing and mandrel are drilled with pin-and-hole, with the pin of steady pin, enter or remove, and realize top life or death dual-purpose.Top boring, cover tooth and the fraising that also can be used for workpiece.
The feature of rolling center:
1, external diameter is little, interference cutter is less, is suitable for high rotating speed, the cutting of moderate;
2, regularly oiling increases the service life;
3, have certain water-proof function, globality is easily dispelled the heat;
4, adopt the long needle bearing of gradient, supported at three point arrangement architecture rigidity is strengthened, good stability.
Stationary center has the shapes such as tapered and head one side of something, the feature of stationary center:
1, the preposition standard type tungsten carbide top heart;
2, heartwood matter in tungsten carbide top is SK2, and hardness reaches 75HRC ± 2;
3, the top heart and body all need precise finiss to reach requirement.
At present, on lathe, use traditional standard top because the problems such as head dimensions is little, specification is few cannot meet the requirement of processing impactor outer shell, therefore, a lot of impactor outer shell manufacturer's employings two ends all clamp the mode of outer ring, so just can not guarantee the concentricity of inner circle and cylindrical, and clamping operation is loaded down with trivial details, has a strong impact on production efficiency.Therefore,, in order to improve clamping precision and assurance product quality, to enhance productivity, need badly improving for processing the top of impactor outer shell.
Utility model content
The utility model, in order to solve weak point of the prior art, provides a kind of and can on lathe and grinding machine, use, enhance productivity, guarantee the conforming impactor outer shell processing of product quality center special simultaneously.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: impactor outer shell processing center special, comprise fixed connection shaft and supporting seat, supporting seat is comprised of cylindrical section and conical section, the larger end of conical section is connected with cylindrical section front end, described supporting seat rear end face center by backward front axle to offering level Four shoulder hole, level Four shoulder hole is blind hole, the first hole that level Four shoulder hole is reduced successively by external diameter, the second hole, the 3rd hole and the 4th hole form, fixed connection shaft front end edge axially extend in level Four shoulder hole, the part of fixed connection shaft in level Four shoulder hole is two-stage multidiameter structure, the two-stage multidiameter of fixed connection shaft is partly respectively equipped with single-row centripetal thrust bearing and single direction thrust ball bearing, single-row centripetal thrust bearing is assemblied in the second hole of supporting seat, single direction thrust ball bearing is assemblied in the 3rd hole of supporting seat, the width of single-row centripetal thrust bearing and single direction thrust ball bearing is less than respectively the axial length in the second hole and the 3rd hole, supporting seat is provided with screw thread at the first hole inwall, the first hole internal thread of supporting seat is connected with the gland with the top interference fit of single-row centripetal thrust bearing rear end, fixed connection shaft is provided with the baffle ring for locating single-row centripetal thrust bearing and coordinating with gland inner ring, single-row centripetal thrust bearing front end is provided with the circlip being enclosed within on fixed connection shaft,
The interference fit stress of single-row centripetal thrust bearing inner ring and fixed connection shaft is greater than the interference fit stress of the second hole inwall of single-row centripetal thrust bearing outer ring and supporting seat, and the interference fit stress of single direction thrust ball bearing inner ring and fixed connection shaft is greater than the interference fit stress of the 3rd hole inwall of single direction thrust ball bearing outer ring and supporting seat;
The conical section of described supporting seat compared with small end center, in axial direction offer the screwed hole being communicated with the 4th hole, screwed hole internal thread is connected with adjustment screw, adjustment screw rear end is connected with the pressing plate that is positioned at the 4th hole, pressing plate is parallel with the front end face of fixed connection shaft, pressing plate rear surface and fixed connection shaft front end face are corresponding to be respectively provided with one and to take and be fixedly connected with the toroidal cavity that shaft centre line is axis, in two toroidal cavities, be provided with ball, between pressing plate rear surface and fixed connection shaft front end face, there is gap, before and after ball respectively with pressing plate and the interference fit of fixed connection shaft top,
Fixed connection shaft is pre-large post-small conical structure in one end, rear portion of baffle ring, and this conical tapering is Morse's taper.
The cylindrical section of described supporting seat is radially provided with the oil filler point being communicated with the second hole, the oil filler point external port place plug cock that has been threaded.
Adopt technique scheme, when the utility model is used in work, the rear portion of fixed connection shaft plugs in the hole of tailstock tool, the front end of impactor outer shell directly or by fixture, be clamped on the chuck of machine tool chief axis, the rear end of impactor outer shell is held out against by conical supporting seat, when carrying out turning or grinding operation, machine tool chief axis drives impactor outer shell and supporting seat High Rotation Speed by chuck.Because fixed connection shaft of the present utility model is by single-row centripetal thrust bearing and single direction thrust ball bearing, so just make supporting seat can bear larger axial force when High Rotation Speed.Because impactor outer shell is in process, supporting seat rotates and fixed connection shaft is fixed, supporting seat also will drive adjustment screw and press plate rotary, therefore between pressing plate and fixed connection shaft, correspondence arranges groove and ball is set in groove, so just can make pressing plate when fixed connection shaft is pressed on top, sliding friction is become to rolling friction, thereby reduce kinetic equation loss.
In the first hole of supporting seat, be screwed hole, gland is threaded in screwed hole, like this can turn gland regulates the end play of single row angular contact ball bearing.In addition, by screwing adjustment screw, make adjustment screw hold out against fixed connection shaft, can regulate like this end play and the bearing pre-fastening of single-row centripetal thrust bearing and single direction thrust ball bearing, can guarantee that so single-row radial thrust bearing and single direction thrust ball bearing keep good working order, thereby extend bearing service life, increase work efficiency.
The tapering at fixed connection shaft rear portion adopts Morse's taper, and Morse's taper is the international standard of a tapering, for stationary fit accurately to locate.Because tapering is very little, utilize the principle of frictional force, can transmit certain moment of torsion, again because be taper fit, so can dismantle easily.In the certain limit of same tapering, workpiece is free to dismounting, can not have influence on result of use again when work simultaneously, such as the taper shank drill of boring, if need to dismantle drill bit grinding in using, again loads onto the center that can not affect drill bit after dismounting.Thereby realize the versatility of lathe and grinding machine.
After when the utility model is used one section, open plug cock, lubricating oil is injected in the second hole by oil filler point, so just can dismantles gland and realize single-row centripetal thrust bearing and single direction thrust ball bearing are lubricated, thereby extend service life of bearing.
In sum, the utility model is reasonable in design, simple in structure, has solved in process and has needed repeatedly to dismantle, the problem of waste of manpower, clamping precision is high, has good versatility, long service life, and greatly enhance productivity, the uniformity of product quality guaranteed.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
The specific embodiment
As shown in Figure 1, impactor outer shell processing center special of the present utility model, comprise fixed connection shaft 1 and supporting seat 2, supporting seat 2 is comprised of cylindrical section and conical section, the larger end of conical section is connected with cylindrical section front end, supporting seat 2 rear end face centers by backward front axle to offering level Four shoulder hole, level Four shoulder hole is blind hole, the first hole 3 that level Four shoulder hole is reduced successively by external diameter, the second hole 4, the 3rd hole 5 and the 4th hole 6 form, fixed connection shaft 1 front end edge axially extend in level Four shoulder hole, the part of fixed connection shaft 1 in level Four shoulder hole is two-stage multidiameter structure, the two-stage multidiameter of fixed connection shaft 1 is partly respectively equipped with single-row centripetal thrust bearing 7 and single direction thrust ball bearing 8, single-row centripetal thrust bearing 7 is assemblied in the second hole 4 of supporting seat 2, single direction thrust ball bearing 8 is assemblied in the 3rd hole 5 of supporting seat 2, the width of single-row centripetal thrust bearing 7 and single direction thrust ball bearing 8 is less than respectively the axial length in the second hole 4 and the 3rd hole 5, supporting seat 2 is provided with screw thread at the first hole 3 inwalls, the first hole 3 internal threads of supporting seat 2 are connected with the gland 9 with 7 top, the rear end interference fits of single-row centripetal thrust bearing, fixed connection shaft 1 is provided with the baffle ring 10 for locating single-row centripetal thrust bearing 7 and coordinating with gland 9 inner rings, single-row centripetal thrust bearing 7 front ends are provided with the circlip 14 being enclosed within on fixed connection shaft 1.
The interference fit stress of single-row centripetal thrust bearing 7 inner rings and fixed connection shaft 1 is greater than the interference fit stress of the second hole 4 inwalls of single-row centripetal thrust bearing 7 outer rings and supporting seat 2, and the interference fit stress of single direction thrust ball bearing 8 inner rings and fixed connection shaft 1 is greater than the interference fit stress of the 3rd hole 5 inwalls of single direction thrust ball bearing 8 outer rings and supporting seat 2.
The conical section of supporting seat 2 compared with small end center, in axial direction offer the screwed hole being communicated with the 4th hole 6, screwed hole internal thread is connected with adjustment screw 11, adjustment screw 11 rear ends are connected with the pressing plate 21 that is positioned at the 4th hole 6, pressing plate 21 is parallel with the front end face of fixed connection shaft 1, pressing plate 21 rear surfaces and fixed connection shaft 1 front end face are corresponding to be respectively provided with one and to take the toroidal cavity that fixed connection shaft 1 center line is axis, between pressing plate 21 rear surfaces and fixed connection shaft 1 front end face, there is gap 23, the profile of the cross section of toroidal cavity is minor arc shape, in two toroidal cavities, be provided with ball 22, ball 22 front and back respectively with pressing plate 21 and fixed connection shaft 1 top interference fit.
Fixed connection shaft 1 is pre-large post-small conical structure in one end, rear portion of baffle ring 10, and this conical tapering is Morse's taper.
The cylindrical section of supporting seat 2 is radially provided with the oil filler point 12 being communicated with the second hole 4, the oil filler point 12 external port places plug cock 13 that has been threaded.
When the utility model is used in work, the rear portion of fixed connection shaft 1 plugs in the hole of tailstock tool, the front end of impactor outer shell directly or by fixture, be clamped on the chuck of machine tool chief axis, the rear end of impactor outer shell is held out against by conical supporting seat 2, when carrying out turning or grinding operation, machine tool chief axis drives impactor outer shell and supporting seat 2 High Rotation Speeds by chuck.Because fixed connection shaft 1 of the present utility model is by single-row centripetal thrust bearing 7 and single direction thrust ball bearing 8, so just make supporting seat 2 can bear larger axial force when High Rotation Speed.
Because impactor outer shell is in process, supporting seat 2 rotates and fixed connection shaft 1 is fixing, supporting seat 2 also will drive adjustment screw 11 and pressing plate 21 to rotate, therefore between pressing plate 21 and fixed connection shaft 1, correspondence arranges groove and ball 22 is set in groove, so just can make pressing plate 21 when fixed connection shaft 1 is pressed on top, sliding friction is become to rolling friction, thereby reduce kinetic equation loss.
In the first hole 3 of supporting seat 2, be screwed hole, gland 9 is threaded in screwed hole, like this can turn gland 9 regulates the end play of single row angular contact ball bearing.In addition, by screwing adjustment screw 11, make adjustment screw 11 hold out against fixed connection shaft 1, can regulate like this end play and the bearing pre-fastening of single-row centripetal thrust bearing 7 and single direction thrust ball bearing 8, can guarantee that so single-row radial thrust bearing 7 and single direction thrust ball bearing 8 keep good working order, thereby extend bearing service life, increase work efficiency.
The tapering at fixed connection shaft 1 rear portion adopts Morse's taper, and Morse's taper is the international standard of a tapering, for stationary fit accurately to locate.Because tapering is very little, utilize the principle of frictional force, can transmit certain moment of torsion, again because be taper fit, so can dismantle easily.In the certain limit of same tapering, workpiece is free to dismounting, can not have influence on result of use again when work simultaneously, such as the taper shank drill of boring, if need to dismantle drill bit grinding in using, again loads onto the center that can not affect drill bit after dismounting.Thereby realize the versatility of lathe and grinding machine.
After when the utility model is used one section, open plug cock 13, lubricating oil is injected in the second hole 4 by oil filler point 12, so just can dismantles gland 9 and realize single-row centripetal thrust bearing 7 and single direction thrust ball bearing 8 are lubricated, thereby extend service life of bearing.
Above-described embodiment is not done any pro forma restriction to shape of the present utility model, material, structure etc.; any simple modification, equivalent variations and modification that every foundation technical spirit of the present utility model is done above embodiment, all belong to the protection domain of technical solutions of the utility model.
Claims (2)
1. impactor outer shell is processed center special, comprise fixed connection shaft and supporting seat, supporting seat is comprised of cylindrical section and conical section, the larger end of conical section is connected with cylindrical section front end, it is characterized in that: described supporting seat rear end face center by backward front axle to offering level Four shoulder hole, level Four shoulder hole is blind hole, the first hole that level Four shoulder hole is reduced successively by external diameter, the second hole, the 3rd hole and the 4th hole form, fixed connection shaft front end edge axially extend in level Four shoulder hole, the part of fixed connection shaft in level Four shoulder hole is two-stage multidiameter structure, the two-stage multidiameter of fixed connection shaft is partly respectively equipped with single-row centripetal thrust bearing and single direction thrust ball bearing, single-row centripetal thrust bearing is assemblied in the second hole of supporting seat, single direction thrust ball bearing is assemblied in the 3rd hole of supporting seat, the width of single-row centripetal thrust bearing and single direction thrust ball bearing is less than respectively the axial length in the second hole and the 3rd hole, supporting seat is provided with screw thread at the first hole inwall, the first hole internal thread of supporting seat is connected with the gland with the top interference fit of single-row centripetal thrust bearing rear end, fixed connection shaft is provided with the baffle ring for locating single-row centripetal thrust bearing and coordinating with gland inner ring, single-row centripetal thrust bearing front end is provided with the circlip being enclosed within on fixed connection shaft,
The interference fit stress of single-row centripetal thrust bearing inner ring and fixed connection shaft is greater than the interference fit stress of the second hole inwall of single-row centripetal thrust bearing outer ring and supporting seat, and the interference fit stress of single direction thrust ball bearing inner ring and fixed connection shaft is greater than the interference fit stress of the 3rd hole inwall of single direction thrust ball bearing outer ring and supporting seat;
The conical section of described supporting seat compared with small end center, in axial direction offer the screwed hole being communicated with the 4th hole, screwed hole internal thread is connected with adjustment screw, adjustment screw rear end is connected with the pressing plate that is positioned at the 4th hole, pressing plate is parallel with the front end face of fixed connection shaft, pressing plate rear surface and fixed connection shaft front end face are corresponding to be respectively provided with one and to take and be fixedly connected with the toroidal cavity that shaft centre line is axis, in two toroidal cavities, be provided with ball, between pressing plate rear surface and fixed connection shaft front end face, there is gap, before and after ball respectively with pressing plate and the interference fit of fixed connection shaft top,
Fixed connection shaft is pre-large post-small conical structure in one end, rear portion of baffle ring, and this conical tapering is Morse's taper.
2. impactor outer shell according to claim 1 processing center special, is characterized in that: the cylindrical section of described supporting seat is radially provided with the oil filler point being communicated with the second hole, the oil filler point external port place plug cock that has been threaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420322066.8U CN203875355U (en) | 2014-06-17 | 2014-06-17 | Special center for machining outer cylinder of impacter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420322066.8U CN203875355U (en) | 2014-06-17 | 2014-06-17 | Special center for machining outer cylinder of impacter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203875355U true CN203875355U (en) | 2014-10-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420322066.8U Expired - Fee Related CN203875355U (en) | 2014-06-17 | 2014-06-17 | Special center for machining outer cylinder of impacter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203875355U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106077721A (en) * | 2016-07-28 | 2016-11-09 | 无锡微研股份有限公司 | Photovoltaic slotting guide roller rotating centre device |
-
2014
- 2014-06-17 CN CN201420322066.8U patent/CN203875355U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106077721A (en) * | 2016-07-28 | 2016-11-09 | 无锡微研股份有限公司 | Photovoltaic slotting guide roller rotating centre device |
| CN106077721B (en) * | 2016-07-28 | 2017-12-15 | 无锡微研股份有限公司 | Photovoltaic slotting guide roller rotating centre device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141015 Termination date: 20150617 |
|
| EXPY | Termination of patent right or utility model |