CN103008693A - Lathe spindle unit - Google Patents
Lathe spindle unit Download PDFInfo
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- CN103008693A CN103008693A CN 201210527341 CN201210527341A CN103008693A CN 103008693 A CN103008693 A CN 103008693A CN 201210527341 CN201210527341 CN 201210527341 CN 201210527341 A CN201210527341 A CN 201210527341A CN 103008693 A CN103008693 A CN 103008693A
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- main shaft
- bearing
- spindle
- chuck
- spindle unit
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Abstract
The invention relates to a lathe spindle unit, which comprises a spindle, a front bearing and a rear bearing which are arranged on the spindle, a guide sleeve and a spline part, wherein the spindle is arranged on a bearing seat, a top rod is arranged in the spindle, a collet sleeve is fixed at the front end of the top rod, a collet is arranged in the collet sleeve, an elastic part is arranged between the collet and the collet sleeve, the rear end of the spindle is provided with a spindle positioning device, and the spindle positioning device comprises a positioning wheel, a positioning pin and a positioning cylinder. According to the lathe spindle unit disclosed by the invention, the positioning precision of the spindle is improved, the output rate of inferior-quality products is reduced, the production efficiency is improved, the temperature rise is low, and the influence on the precision of a processed product is small.
Description
Technical field
The present invention relates to relate to a kind of main axle unit, relate in particular to a kind of lathe spindle unit.
Background technology
Shaft type turnning and milling complex centre main shaft electronic main shaft and the sleeve-type main shafts of adopting are walked in numerical control more on the market now.The electronic main shaft of high-end lathe is the Japanese world.Fanuc and MITSUBISHI company on the basis of their advanced person's servomotor technology with the electronic main shaft function admirable of the famous Company co-production such as NSK, high scooter 30000 turns, angle orientation is accurate, operates steadily.Particularly Fanuc company has almost monopolized the market of the electronic main shaft of Chinese numerically controlled lathe.But Japanese electric main shaft supply Chinese market price is high going against accepted conventions all, high 180,000 RMB, and also reach three or four months delivery date, even half a year.Medium and small lathe is difficult to cooperate with it.Domestic also have the rich top grade numerically controlled lathe electricity consumption main shaft in Shandong but because they are incompatible with the control system of reputable brand, generally all is the employing Frequency Converter Control.Allow rotating speed also not high, say to allow 6000 to turn, but in fact turn higher with regard to temperature rise to more than 4000, vibrations are larger to the Accuracy of converted products greatly.It is not bery high to add positioning accuracy, therefore can't be widely accepted.
The Chinese patent Granted publication number is CN 201086132Y, Granted publication day is that the utility model patent on July 16th, 2008 discloses a kind of lathe spindle unit, it has main shaft, be installed on the front and back two bearings on the main shaft, be placed in the outer sleeve of bearing, pull bar is arranged in the main shaft, the pull bar front end is fixed with the chuck cover, chuck places in the chuck cover and is provided with elastic component between the two, and chuck openend and chuck cover are equipped with the coadapted conical surface, and end cap is pressed on chuck and chuck upper shield in the main shaft.
Said apparatus can be so that the processing rigidity reinforced, and process more accurate, but has C axle calibration function owing to walk core type numerical control cutting center, it is inadequate depending synchronous tightening force alone, this device main shaft when cutting is certain to shake, at this time positioning accuracy has just been run, and just can't guarantee the precision of processing parts, causes the occurrence probability of waste product to increase.
Summary of the invention
The objective of the invention is to overcome the problem of existing apparatus main shaft orientation weak effect, provide a kind of main shaft orientation effective lathe spindle unit.
For realizing above purpose, technical solution of the present invention is: a kind of lathe spindle unit, comprise main shaft, be installed in fore bearing and rear bearing, guide pin bushing and splined section on the main shaft, described main shaft is installed on the bearing block, be provided with push rod in the described main shaft, the push rod front end is fixed with the chuck cover, be provided with chuck in the described chuck cover, be provided with elastic component between described chuck and the chuck cover, the rear end of described main shaft is equipped with main shaft positioning device, and described main shaft positioning device comprises locating wheel, alignment pin and location cylinder.
On the described spindle drum spindle servo electric machine is installed, on the power transmission shaft of described spindle servo electric machine synchronous pulley is installed, described synchronous pulley is connected Timing Belt with main shaft and connects.
Open and close claw, tapering ring set and adjusting nut are installed on the described main shaft, the rotating shaft core is installed on the Open and close claw.
Described splined section comprises splined shaft and spline bearing overcoat, is connected by hardboard between described spline bearing overcoat and the bearing block, is connected by Timing Belt between splined shaft and main shaft, the guide pin bushing.
Described fore bearing and main shaft are interference fit, and shrink value is 0.002～0.004mm, and described rear bearing and main shaft are matched in clearance, and fit clearance is 0.002～0.006mm.
Compared with prior art, the present invention has following benefit:
1, the present invention has increased main shaft positioning device, has improved the positioning accuracy of main shaft, has reduced the substandard products rate of output, has improved production efficiency, has reduced cost.
2, adopt main shaft, spindle servo electric machine to be installed in structure on the same spindle drum among the present invention, so both guaranteed the main shaft rigidity, the depth of parallelism of guaranteed spindle servo electric machine axle center axis and alignment of shafts axis.
3, fore bearing and main shaft are interference fit among the present invention, and rear bearing and main shaft are matched in clearance, and the accuracy guarantee and the running adstante febre back that are beneficial to chuck are installed like this swell gap.
4, the present invention adopts spindle servo electric machine band 3GT synchronous pulley in transmission, and transmission efficiency is high, the accurate and stable drive of gearratio.
5, the forward and backward bearing among the present invention adopts the high-speed spindle bearing special grease, once fill and can not change in 3 years in right amount, and spindle drum takes Open architecture, and performance of ventilating is good, and actual 8000 temperature rises when turning are all in 25 ℃.
Description of drawings
Fig. 1 is structural representation of the present invention (analysing and observe).
Fig. 2 is the A-A face cutaway view of Fig. 1.
Fig. 3 is the B-B face cutaway view of Fig. 1.
Among the figure: main shaft 1, fore bearing 2, rear bearing 3, guide pin bushing 4, bearing block 5, push rod 6, chuck cover 7, chuck 8, elastic component 9, main shaft positioning device 10, locating wheel 11, alignment pin 12, positioning cylinder 13, spindle servo electric machine 14, synchronous pulley 15, Open and close claw 16, tapering ring set 17, adjusting nut 18, rotating shaft core 19, splined shaft 20, spline bearing overcoat 21, hardboard 22, shift fork 23, bearing 24.
The specific embodiment
The present invention is further detailed explanation below in conjunction with description of drawings and the specific embodiment:
Referring to Fig. 1, Fig. 3, a kind of lathe spindle unit, comprise main shaft 1, be installed in fore bearing 2 and rear bearing 3 on the main shaft 1, guide pin bushing 4 and splined section, described splined section comprises splined shaft 20 and spline bearing overcoat 21, described main shaft 1 and spindle servo electric machine 14 are installed on the bearing block 5, be provided with push rod 6 in the described main shaft 1, push rod 6 front ends are fixed with chuck cover 7, be provided with chuck 8 in the described chuck cover 7, be provided with elastic component 9 between described chuck 8 and the chuck cover 7, the end cap of main shaft 1 front end is pressed on chuck 8 and chuck cover 7 lids in the main shaft 1, the rear end of described main shaft 1 is equipped with main shaft positioning device 10, described main shaft positioning device 10 comprises locating wheel 11, alignment pin 12 and location cylinder 13, synchronous pulley 15 is installed on the power transmission shaft of described spindle servo electric machine 14, described synchronous pulley 1 is connected with main shaft and is connected by Timing Belt, be connected by hardboard 22 between described spline bearing overcoat 21 and the bearing block 5, splined shaft 20 and main shaft 1, connect by Timing Belt between the guide pin bushing 4, can realize the run-in synchronism of main shaft 1 and guide pin bushing 4.
Described fore bearing 2 is interference fit with main shaft 1, shrink value is 0.002～0.004mm, described rear bearing 3 is matched in clearance with main shaft 1, and fit clearance is 0.002～0.006mm, and the accuracy guarantee and the running adstante febre back that are beneficial to chuck so are installed the swell gap.
Open and close claw 16, tapering ring set 17 and adjusting nut 18 are installed on the described main shaft 1, rotating shaft core 19 is installed on the Open and close claw 16.
Referring to Fig. 1-Fig. 2, the process of main shaft chuck locking material is: open and close cylinder by the bearing 24 on flake joint connection shift fork 23 and the shift fork 23, when the switching cylinder promotes forward, shift fork 23 and bearing 24 can drive vertically upward displacement of tapering ring set 17, tapering ring set 17 can back down Open and close claw 16, so that Open and close claw 16 is done the pull bar motion around rotating shaft core 19, push rod 6 and chuck cover 7 are pushed move ahead to compressing chuck 8 locking materials; The process of main shaft chuck unwound material is: when the switching cylinder promotes backward, shift fork 23 and bearing 24 can drive vertically displacement downwards of tapering ring set 17, can drive tapering ring set 17 and break away from Open and close claw 16, by the elastic component 9 in the chuck cover 7 chuck cover 7 be separated with chuck 8, thus unwound material.
Referring to Fig. 3, when lathe starts C axle calibration function, stop behind main shaft 1 calibration, positioning cylinder 13 obtains signal promotion alignment pin 12 and blocks locating wheel 11, thereby the radial clearance of main shaft 1 with rear bearing 3 eliminated, and reaches locating effect.Mill sell out after, C axle calibration function stop, positioning cylinder 13 drives alignment pins 12 and pulls back, and finishes position fixing process.
Claims (5)
1. lathe spindle unit, comprise main shaft (1), be installed in fore bearing (2) and rear bearing (3) on the main shaft (1), guide pin bushing (4) and splined section, described main shaft (1) is installed on the bearing block (5), be provided with push rod (6) in the described main shaft (1), push rod (6) front end is fixed with chuck cover (7), be provided with chuck (8) in the described chuck cover (7), be provided with elastic component (9) between described chuck (8) and the chuck cover (7), it is characterized in that: the rear end of described main shaft (1) is equipped with main shaft positioning device (10), and described main shaft positioning device (10) comprises locating wheel (11), alignment pin (12) and location cylinder (13).
2. a kind of lathe spindle unit according to claim 1, it is characterized in that: spindle servo electric machine (14) is installed on the described spindle drum (5), synchronous pulley (15) is installed on the power transmission shaft of described spindle servo electric machine (14), and described synchronous pulley (15) is connected 1 with main shaft) connect by Timing Belt.
3. a kind of lathe spindle unit according to claim 1 is characterized in that: Open and close claw (16), tapering ring set (17) and adjusting nut (18) are installed on the described main shaft (1), rotating shaft core (19) is installed on the Open and close claw (16).
4. a kind of lathe spindle unit according to claim 1, it is characterized in that: described splined section comprises splined shaft (20) and spline bearing overcoat (21), be connected by hardboard (22) between described spline bearing overcoat (21) and the bearing block (5), splined shaft (20) is connected by Timing Belt between (4) with main shaft (1), guide pin bushing.
5. a kind of lathe spindle unit according to claim 1, it is characterized in that: described fore bearing (2) is interference fit with main shaft (1), shrink value is 0.002～0.004mm, and described rear bearing (3) is matched in clearance with main shaft (1), and fit clearance is 0.002～0.006mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210527341 CN103008693A (en) | 2012-12-10 | 2012-12-10 | Lathe spindle unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210527341 CN103008693A (en) | 2012-12-10 | 2012-12-10 | Lathe spindle unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103008693A true CN103008693A (en) | 2013-04-03 |
Family
ID=47958105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210527341 Pending CN103008693A (en) | 2012-12-10 | 2012-12-10 | Lathe spindle unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103008693A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104015081A (en) * | 2014-06-10 | 2014-09-03 | 南京建克机械有限公司 | Locking structure for matching jaws with sliding sleeve of main shaft of sliding machine |
| CN104015081B (en) * | 2014-06-10 | 2016-11-30 | 南京建克机械有限公司 | Walk scheming main shaft sliding sleeve and coordinate the locking mechanism of claw |
| CN107442787A (en) * | 2017-08-31 | 2017-12-08 | 南京肯迈得机床制造有限公司 | Worm screw turnning and milling composite main shaft |
| CN109128835A (en) * | 2018-10-24 | 2019-01-04 | 威海博世特精密机械有限公司 | Longitudinal sectional formula complex milling machine tool |
-
2012
- 2012-12-10 CN CN 201210527341 patent/CN103008693A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104015081A (en) * | 2014-06-10 | 2014-09-03 | 南京建克机械有限公司 | Locking structure for matching jaws with sliding sleeve of main shaft of sliding machine |
| CN104015081B (en) * | 2014-06-10 | 2016-11-30 | 南京建克机械有限公司 | Walk scheming main shaft sliding sleeve and coordinate the locking mechanism of claw |
| CN107442787A (en) * | 2017-08-31 | 2017-12-08 | 南京肯迈得机床制造有限公司 | Worm screw turnning and milling composite main shaft |
| CN109128835A (en) * | 2018-10-24 | 2019-01-04 | 威海博世特精密机械有限公司 | Longitudinal sectional formula complex milling machine tool |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130403 |