CN102962766A - Super-speed precision motorized spindle structure for grinding small-diameter deep hole - Google Patents
Super-speed precision motorized spindle structure for grinding small-diameter deep hole Download PDFInfo
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- CN102962766A CN102962766A CN2012105085473A CN201210508547A CN102962766A CN 102962766 A CN102962766 A CN 102962766A CN 2012105085473 A CN2012105085473 A CN 2012105085473A CN 201210508547 A CN201210508547 A CN 201210508547A CN 102962766 A CN102962766 A CN 102962766A
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Abstract
The invention discloses a super-speed precision motorized spindle structure for grinding a small-diameter deep hole. The super-speed precision motorized spindle structure comprises a high-speed spindle driving system and a cutting fluid internal jetting cooling system, wherein the high-speed spindle driving system comprises a front bearing, a front bearing pedestal, a spindle, a motor rotor, a motor stator, a cooling water jacket, a shell, a rear bearing, a rear bearing pedestal and a linear bearing, wherein the cutting fluid internal jetting cooling system comprises a cutting fluid jet pipe, a cutting fluid reflux pipe, a preloaded spring, a water inlet pipe and a drainage pipe. According to the super-speed precision motorized spindle structure, through the cutting fluid internal jetting cooling system, cutting cooling fluid is input from the cutting fluid jet pipe and then is sent to a small-diameter deep hole grinding area through an air-sealed non-contact coupling to play a cooling and lubrication role; and meanwhile, the high-speed grinding for the small-diameter deep hole is realized based on a variable-frequency speed control super-speed motorized spindle driving system.
Description
Technical field
The present invention relates to a kind of ultra-speed precise electricity main axle structure for the grinding Small-deep Hole, belong to High-speed machining equipment field.
Background technology
Use more widely in that mechanical engineering field is existing with the part of high accuracy, minor diameter, ultralong deep hole, such as the spool of diesel injector and nozzle etc., its median pore diameter is Φ 3mm ~ Φ 6mm, and mesopore circularity, cylindricity should be strict controlled in the micron order precision.The accurate grinding equipment of this type of part of China mainly relies on by import at present.
This type of Small-deep Hole of grinding proposes higher requirement to electric spindle design manufacturing.On the one hand, for obtaining the machining accuracy of regulation, very high grinding linear velocity must be arranged, and because the aperture is little, main shaft need reach the linear velocity that high rotating speed could obtain regulation; On the other hand, because main axis stiffness the softening phenomenon of rigidity can occur with the rotating speed rising, i.e. the rigidity of main shaft curved decline along with the rising of rotating speed, therefore the main shaft of design needs also to provide corresponding rigidity under high rotating speed.
In addition, because the processing aperture is little, emery wheel occupies most of space in the aperture, adopts traditional outer jet type of cooling, cooling fluid to be difficult for arriving grinding area as continuing, and is difficult to the cooling and lubricating effect that reaches desirable.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of high-speed motorized spindles structure for the grinding Small-deep Hole is provided, improve the grinding linear velocity; Adopt spraying cooling system in the cutting fluid in electric main axle structure, cutting fluid is difficult for entering the technical barrier of grinding area when overcoming the Small-deep Hole internal grinding.
The technical solution used in the present invention is: a kind of ultra-speed precise electricity main axle structure for the grinding Small-deep Hole comprises spraying cooling system in high-speed main spindle drive system and the cutting fluid;
Described high-speed main spindle drive system comprises fore bearing, front-end bearing pedestal, main shaft, rotor, motor stator, cooling jacket, shell, rear bearing, rear bearing block and linear bearing, described shell front end is equipped with cooling jacket, described motor stator interference is installed in the cooling jacket middle part, described main shaft middle part interference is equipped with rotor, main shaft supports by fore bearing and the rear bearing that is installed in its two ends, described fore bearing is installed in the front-end bearing pedestal, described rear bearing is installed in the rear bearing block, and rear bearing block is installed in the enclosure by linear bearing;
Spraying cooling system comprises cutting fluid jet pipe, cutting fluid reflux line, preloading spring, inlet channel and drainage pipeline in the described cutting fluid, described cutting fluid jet pipe and cutting fluid reflux line are positioned at the rear bearing block middle part, and the cutting fluid jet pipe is concentric with main shaft, described preloading spring applies axial pretightening by cutting fluid reflux line and rear bearing block to rear bearing, described inlet channel is connected with the cutting fluid jet pipe, and described drainage pipeline is connected with the cutting fluid reflux line.
Described cutting fluid jet pipe and the endoporus of main shaft are that the noncontact joint of air seal is connected.
Beneficial effect: the present invention adopts spraying cooling system in the cutting fluid, and cutting coolant is by the input of cutting fluid jet pipe, and gas coming through sealing noncontact pipe joint is delivered to the Small-deep Hole grinding area, plays the cooling and lubricating effect; Based on the high-speed motorized spindles drive system of frequency control, realize the high-speed grinding of Small-deep Hole simultaneously.
Description of drawings
Fig. 1 is the structural representation of a kind of ultra-speed precise electricity main shaft for the grinding Small-deep Hole provided by the invention.
The specific embodiment
The present invention will be further described below in conjunction with the drawings and specific embodiments.
As shown in Figure 1: a kind of ultra-speed precise electricity main axle structure for the grinding Small-deep Hole comprises spraying cooling system in high-speed main spindle drive system and the cutting fluid;
Described high-speed main spindle drive system comprises fore bearing 2, front-end bearing pedestal 3, main shaft 4, rotor 5, motor stator 7, cooling jacket 6, shell 9, rear bearing 8, rear bearing block 11 and linear bearing 10, described shell 9 front ends are equipped with cooling jacket 6, described motor stator 7 interference are installed in cooling jacket 6 middle parts, described main shaft 4 middle part interference are equipped with rotor 5, main shaft 4 supports by fore bearing 2 and the rear bearing 8 that is installed in its two ends, described fore bearing 2 is installed in the front-end bearing pedestal 3, described rear bearing 8 is installed in the rear bearing block 11, and rear bearing block 11 is installed in the shell 9 by linear bearing 10;
Spraying cooling system comprises cutting fluid jet pipe 12, cutting fluid reflux line 13, preloading spring 14, inlet channel 15 and drainage pipeline 16 in the described cutting fluid, described cutting fluid jet pipe 12 is positioned at rear bearing block 11 middle parts with cutting fluid reflux line 13, and cutting fluid jet pipe 12 is concentric with main shaft 4, described preloading spring 14 applies axial pretightening by cutting fluid reflux line 13 and 11 pairs of rear bearings 8 of rear bearing block, described inlet channel 15 is connected with cutting fluid jet pipe 12, and described drainage pipeline 16 is connected with cutting fluid reflux line 13.Described cutting fluid jet pipe 12 and the endoporus of main shaft 4 are that the noncontact joint of air seal is connected.
When the present invention works, pass into cutting fluid from inlet channel 15, the cutting fluid cutting fluid jet pipe 12 of flowing through passes into from the centre bore of main shaft 4, from bistrique 1 ejection, workpiece machining surface is cooled off.Remaining cutting fluid refluxes from the gap between cutting fluid jet pipe 12 and the main shaft 4, flows out through return port, discharges from drainage pipeline 16.Bearing lubrication oil gas is lubricated rear bearing 8 from rear bearing block 11 interior pipelines, and residual compression gas flows out from the gap between rear bearing block 11 and the main shaft 4, forms the noncontact sealing, prevents that cutting fluid from entering bearing chamber.
High-speed electric main shaft of the present invention adopts the High speed Angular Contact Ceramic ceramic ball bearing, and bearing rigidity is high.The cutting fluid spindle hole through hole of flowing through from the ejection of emery wheel extension bar hole for water spraying, cools off finished surface, simultaneously front and back bearings and rotor is cooled off, and reduces electric main shaft internal temperature rise.The residual gas of rear bearing oil-air lubrication forms air seal between main shaft and bearing block, prevent that cutting fluid from refluxing.
Should be pointed out that for those skilled in the art under the prerequisite that does not break away from the principle of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.In the present embodiment not clear and definite each part all available prior art realized.
Claims (2)
1. a ultra-speed precise electricity main axle structure that is used for the grinding Small-deep Hole is characterized in that: comprise spraying cooling system in high-speed main spindle drive system and the cutting fluid;
Described high-speed main spindle drive system comprises fore bearing, front-end bearing pedestal, main shaft, rotor, motor stator, cooling jacket, shell, rear bearing, rear bearing block and linear bearing, described shell front end is equipped with cooling jacket, described motor stator interference is installed in the cooling jacket middle part, described main shaft middle part interference is equipped with rotor, main shaft supports by fore bearing and the rear bearing that is installed in its two ends, described fore bearing is installed in the front-end bearing pedestal, described rear bearing is installed in the rear bearing block, and rear bearing block is installed in the enclosure by linear bearing;
Spraying cooling system comprises cutting fluid jet pipe, cutting fluid reflux line, preloading spring, inlet channel and drainage pipeline in the described cutting fluid, described cutting fluid jet pipe and cutting fluid reflux line are positioned at the rear bearing block middle part, and the cutting fluid jet pipe is concentric with main shaft, described preloading spring applies axial pretightening by cutting fluid reflux line and rear bearing block to rear bearing, described inlet channel is connected with the cutting fluid jet pipe, and described drainage pipeline is connected with the cutting fluid reflux line.
2. a kind of ultra-speed precise electricity main axle structure for the grinding Small-deep Hole according to claim 1 is characterized in that: described cutting fluid jet pipe and the endoporus of main shaft are that the noncontact joint of air seal is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105085473A CN102962766A (en) | 2012-12-03 | 2012-12-03 | Super-speed precision motorized spindle structure for grinding small-diameter deep hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105085473A CN102962766A (en) | 2012-12-03 | 2012-12-03 | Super-speed precision motorized spindle structure for grinding small-diameter deep hole |
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| CN102962766A true CN102962766A (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012105085473A Pending CN102962766A (en) | 2012-12-03 | 2012-12-03 | Super-speed precision motorized spindle structure for grinding small-diameter deep hole |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103286679A (en) * | 2013-06-17 | 2013-09-11 | 东南大学 | Super high speed air bearing electric main shaft |
| CN103962584A (en) * | 2014-04-30 | 2014-08-06 | 大连理工大学 | Liquid nitrogen inner spraying type numerical control drilling and milling machine main shaft device |
| CN108406342A (en) * | 2018-05-04 | 2018-08-17 | 深圳市速锋科技股份有限公司 | A kind of cooling structure and lubrication system of electro spindle |
| CN112975459A (en) * | 2021-04-12 | 2021-06-18 | 大连理工大学 | Vacuum mandrel rotary type ultralow-temperature medium internal spraying type electric spindle |
| CN115781522A (en) * | 2022-12-28 | 2023-03-14 | 哈尔滨工业大学 | Grinding electric spindle with internal spiral grinding fluid supply channel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2716578Y (en) * | 2004-08-09 | 2005-08-10 | 湖南大学 | Motor postpositive electric main shaft with sliding bearings |
| CN201275724Y (en) * | 2008-10-24 | 2009-07-22 | 北京第二机床厂有限公司 | Grinding head apparatus with multiple sand wheel main shaftings |
| CN201559121U (en) * | 2009-11-20 | 2010-08-25 | 无锡机床股份有限公司 | Grinding wheel spindle using air bearing |
| CN102172889A (en) * | 2011-03-03 | 2011-09-07 | 沈阳机床股份有限公司 | Universal grinding head device for vertical turning center |
| CN102717333A (en) * | 2012-06-29 | 2012-10-10 | 无锡机床股份有限公司 | High-speed electric main shaft structure of machine tool |
-
2012
- 2012-12-03 CN CN2012105085473A patent/CN102962766A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2716578Y (en) * | 2004-08-09 | 2005-08-10 | 湖南大学 | Motor postpositive electric main shaft with sliding bearings |
| CN201275724Y (en) * | 2008-10-24 | 2009-07-22 | 北京第二机床厂有限公司 | Grinding head apparatus with multiple sand wheel main shaftings |
| CN201559121U (en) * | 2009-11-20 | 2010-08-25 | 无锡机床股份有限公司 | Grinding wheel spindle using air bearing |
| CN102172889A (en) * | 2011-03-03 | 2011-09-07 | 沈阳机床股份有限公司 | Universal grinding head device for vertical turning center |
| CN102717333A (en) * | 2012-06-29 | 2012-10-10 | 无锡机床股份有限公司 | High-speed electric main shaft structure of machine tool |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103286679A (en) * | 2013-06-17 | 2013-09-11 | 东南大学 | Super high speed air bearing electric main shaft |
| CN103286679B (en) * | 2013-06-17 | 2015-12-02 | 东南大学 | A kind of ultrahigh speed air bearing electric main-shaft |
| CN103962584A (en) * | 2014-04-30 | 2014-08-06 | 大连理工大学 | Liquid nitrogen inner spraying type numerical control drilling and milling machine main shaft device |
| CN108406342A (en) * | 2018-05-04 | 2018-08-17 | 深圳市速锋科技股份有限公司 | A kind of cooling structure and lubrication system of electro spindle |
| CN112975459A (en) * | 2021-04-12 | 2021-06-18 | 大连理工大学 | Vacuum mandrel rotary type ultralow-temperature medium internal spraying type electric spindle |
| CN115781522A (en) * | 2022-12-28 | 2023-03-14 | 哈尔滨工业大学 | Grinding electric spindle with internal spiral grinding fluid supply channel |
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Application publication date: 20130313 |