CN112975459A - Vacuum mandrel rotary type ultralow-temperature medium internal spraying type electric spindle - Google Patents
Vacuum mandrel rotary type ultralow-temperature medium internal spraying type electric spindle Download PDFInfo
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- CN112975459A CN112975459A CN202110398606.5A CN202110398606A CN112975459A CN 112975459 A CN112975459 A CN 112975459A CN 202110398606 A CN202110398606 A CN 202110398606A CN 112975459 A CN112975459 A CN 112975459A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/14—Methods or arrangements for maintaining a constant temperature in parts of machine tools
Abstract
A vacuum core shaft rotary ultralow temperature medium internal spraying type electric main shaft comprises a main shaft body structure and an ultralow temperature medium supply and heat insulation conveying structure; the main structure of the main shaft comprises a hollow main shaft, a hollow tool handle, a main shaft outer shell, a hollow shaft motor rotor magnetic pole, a hollow shaft motor stator core, a winding and a hydraulic cylinder; the ultra-low temperature medium supply and heat insulation conveying structure comprises a vacuum heat insulation core shaft and an ultra-low temperature rotary joint; the hollow main shaft is of a rotating main body structure, and meanwhile, an internal hollow channel provides a mounting position for the vacuum heat insulation core shaft; the vacuum heat insulation core shaft provides a passage for conveying the ultralow temperature medium and simultaneously plays a role in bearing the cutter pulling force of the disc spring and the cutter loosening force of the hydraulic cylinder; the vacuum heat insulation core shaft is communicated with a cutter cooling channel through the inside of the hollow cutter handle, so that ultralow-temperature medium leakage in the cutter handle and medium diffusion to the inside of the main shaft are avoided, and a better heat insulation effect is achieved. The whole structure is relatively simple, the assembly, the maintenance and the repair are easy, and the reliability and the precision retentivity are higher.
Description
Technical Field
The invention belongs to the technical field of numerical control machines, and particularly relates to a vacuum mandrel rotary type ultralow-temperature medium internal-spraying electric spindle.
Background
The ultra-low temperature processing is a green processing technology, can realize the extremely low cooling temperature of less than-153 ℃ in the processing process, and has incomparable advantages for processing difficult-to-process metal materials such as titanium alloy, high-temperature alloy, cobalt-chromium alloy and the like. The internal spraying type cooling mode has the advantages of being accurate in cooling and high in cooling efficiency, and the development of related processing equipment is significant.
The ultralow temperature internal-spraying type motorized spindle is an important component of an ultralow temperature processing machine tool for high-quality and high-efficiency operation. In the working process, the ultralow temperature medium is directly sprayed from the tool tip position of the tool through the main shaft internal pipeline, the hollow tool handle and the hollow tool, and directly cools the workpiece. The ultralow temperature medium liquid represented by liquid nitrogen-196 ℃ has stronger cooling capacity, can greatly reduce the cutting temperature, improve the processing quality and prolong the service life of the cutter, but is extremely easy to be heated and vaporized, and has higher requirements on the transmission process. The traditional inner-cooling type motorized spindle is weak in internal heat insulation capability and very easy to generate heat transfer in a medium transmission process, so that the spindle structure is seriously shrunk or even frozen, and the problems of matching failure, lubrication failure and the like of parts such as an internal motor, a bearing and the like are very easy to generate. Therefore, the above-mentioned problems have made higher demands on the design of the internal heat insulation and sealing mechanism of the ultralow temperature medium internal injection type electric spindle suitable for high-speed operation.
At present, various ultralow temperature internal injection type electric spindle structures are developed by domestic and foreign institutions. In 2012, krey ltd, usa discloses in patent CN102427912A "a device for delivering a cryogenic fluid to a spindle through a machine tool", which delivers the cryogenic fluid to a tool tip along a vacuum heat insulation pipeline on an internal rotation axis of the spindle, thereby achieving cryogenic fluid internal-injection cooling. But the actuating structure which is arranged at the middle rear part of the main shaft and is used for realizing the driving force of automatic tool changing has larger axial size, poorer integration and relative complexity, higher failure rate and higher maintenance cost. The 5ME company Tao Lu in the united states published a Cryogenic Machining through the Spindle and Tool for Improved Machining Process Performance and sustaniability at the fifteenth global conference of sustainable manufacturing, and introduced a liquid nitrogen internal injection type Spindle for delivering liquid nitrogen to a Machining area through a heat insulating fluid passage via the Spindle and Tool holder to achieve ultra-low temperature cooling. However, the heat-insulating fluid channel of the main shaft is a hose, the radial size is small, the strength is low, and the pulling force and the pushing force of the automatic loosening broach cannot be borne, so that the main shaft can only be used for manually assembling and disassembling the tool. The university of major associates discloses a liquid nitrogen internal injection type numerical control drilling and milling machine spindle device in patent 201410182721.9, which ensures low-loss transmission of liquid nitrogen medium in the spindle through a liquid nitrogen heat insulation pipe assembly in the spindle. However, the device is easy to leak and diffuse liquid nitrogen at the joint of the heat insulation pipe fitting and the handle rivet. Meanwhile, the main shaft is a mechanical transmission main shaft, and related structural designs such as an internal motor stator, a rotor and an automatic tool changing device are not involved.
Disclosure of Invention
The invention provides a vacuum mandrel rotary type ultralow temperature medium internal spraying type electric main shaft aiming at the defects or improvement requirements of the prior art, realizes the reliable conveying of an ultralow temperature medium in the main shaft, and avoids the problems of shrinkage freezing of a main shaft structure, matching failure of parts such as a motor and a bearing, lubrication failure and the like caused by the heat transfer of the ultralow temperature medium in the main shaft.
In order to achieve the purpose, the invention adopts the technical scheme that:
a vacuum core shaft rotary ultralow temperature medium internal spraying type electric main shaft comprises a main shaft body structure and an ultralow temperature medium supply and heat insulation conveying structure; the main structure of the main shaft mainly comprises a hollow main shaft 1.1, a hollow tool shank 1.3, a main shaft outer shell 1.4, a hollow shaft motor rotor magnetic pole 1.8, a hollow shaft motor stator core and winding 1.9 and a hollow annular hydraulic cylinder 1.12; the ultra-low temperature medium supply and heat insulation conveying structure comprises a vacuum heat insulation core shaft 1.2 and an ultra-low temperature rotary joint 1.6;
the hollow main shaft 1.1 is a main body structure of the main shaft rotation, and a hollow channel processed inside provides an installation space for the vacuum heat insulation core shaft 1.2; the outer end face 2.1 at the front part of the hollow main shaft and the outer end face 2.2 at the tail part of the hollow main shaft are positioning faces of the hollow main shaft 1.1; the front bearing group 1.14 and the rear bearing group 1.15 play a role in supporting the hollow main shaft 1.1 and internal parts thereof to rotate; the outer conical surface of the hollow tool handle 1.3 is attached to the inner conical surface 2.3 at the front end of the hollow main shaft, so that the positioning and clamping effects are achieved;
the vacuum heat insulation core shaft 1.2 is a conveying channel of an ultralow temperature medium and is used for suppressing heat exchange between the ultralow temperature medium and a main shaft material and internal parts; the vacuum heat insulation core shaft 1.2 simultaneously bears the tension of the disc spring 1.7 and the thrust of the hydraulic cylinder 1.12, so that the axial movement of the vacuum heat insulation core shaft 1.2 during automatic tool changing is realized; the outer wall surface 2.5 at the front end of the vacuum heat insulation mandrel and the outer wall surface 2.8 at the rear part of the vacuum heat insulation mandrel are positioning surfaces of the vacuum heat insulation mandrel 1.2, and a key groove is processed on the surface of the outer end surface 2.6 at the middle part of the vacuum heat insulation mandrel to realize the fixation with the disc spring 1.7;
the hollow knife handle 1.3 is internally provided with a hollow channel, so that the vacuum heat insulation core shaft 1.2 passes through the interior of the hollow knife handle and is directly communicated to the foremost end of the knife handle, the leakage of an ultralow temperature medium in the hollow knife handle 1.3 is avoided, and the inner arc surface 2.4 of the hollow knife handle processed in the hollow knife handle 1.3 is a limiting surface after the pulling claw 1.10 is opened;
when the vacuum mandrel rotary type ultralow-temperature medium internal-spraying electric spindle is assembled, a pull claw 1.10 and a broach ejector rod mechanism 1.11 are arranged along the front end of a vacuum heat insulation mandrel 1.2 in an interference manner; vertically installing a disc spring 1.7 from an opening at the tail part of a hollow main shaft 1.1; the vacuum heat insulation mandrel 1.2 is loaded from an opening at the tail part of the hollow main shaft 1.1 until the outer wall surface 2.5 at the front end of the vacuum heat insulation mandrel is tightly attached to the broach ejector rod mechanism 1.11; sleeving the end cover 1.5 along the vacuum heat insulation mandrel 1.2 from the tail part of the main shaft until the outer wall surface 2.5 at the front end of the vacuum heat insulation mandrel is attached to the rightmost end of the broach ejector rod mechanism 1.11; loading the end cover 1.5 along the tail part of the vacuum heat insulation core shaft 1.2 until the end cover is attached to the outer wall surface 2.7 of the tail part of the hollow main shaft, and screwing and fastening bolts into the hollow main shaft and the threaded hole 1.a of the end cover by using a torque wrench; sleeving a magnetic pole 1.8 of a hollow shaft motor rotor into the outer end face 2.9 in the middle of the hollow main shaft from the tail part of the vacuum main shaft 1.1 and completely attaching the magnetic pole; sleeving a stator core and a winding 1.9 of the hollow shaft motor into a hollow main shaft 1.1 and ensuring the stator core and the winding to be concentric; sleeving a hollow annular hydraulic cylinder 1.12 along the tail part of the vacuum heat insulation mandrel 1.2 until the hollow annular hydraulic cylinder is attached to the end cover 1.5; sleeving the tail cover 1.13 along the tail part of the vacuum heat insulation mandrel 1.2 until the tail cover is attached to the right end face of the hollow annular hydraulic cylinder 1.12, and screwing a bolt into the outer shell and the tail cover threaded hole 1.c by using a torque wrench for fastening; a front bearing group 1.14 is arranged along the outer end face 2.1 of the front part of the hollow main shaft and tightly attached with force; a rear bearing group 1.15 is arranged along the outer end face 2.2 of the rear part of the hollow main shaft and tightly attached with force; the hollow main shaft 1.1 with the assembled bearing group and the internal structure is installed from the front end of the main shaft outer shell 1.4, and a bolt is screwed into a threaded hole 1.b in the front of the outer shell; finally, the ultralow temperature rotary joint 1.6 is connected with the tail joint of the vacuum heat insulation core shaft 1.2;
when the vacuum mandrel rotary type ultralow-temperature medium internal-spraying electric main shaft works, the hollow tool shank 1.3 is installed into the vacuum main shaft 1.1 from the front end of the main shaft, and the outer conical surface of the tool shank is ensured to be attached to the inner conical surface 2.3 at the front end of the hollow main shaft; opening an external main shaft regulating and controlling device to enable a main shaft to start rotating, keeping the rotating speed at 5000rpm, starting an external ultralow temperature supply system, and at the moment, forcibly inputting ultralow temperature media from the outside to an ultralow temperature rotary joint 1.6 and conveying the ultralow temperature media to the foremost end of a hollow cutter handle 1.3 through a vacuum heat insulation core shaft 1.2; keeping the main shaft rotating and ultra-low temperature medium spraying for 10-12min to complete integral debugging and precooling.
The invention has the advantages that when the electric main shaft runs at a high speed, the internal vacuum heat insulation conveying core shaft consisting of the vacuum multilayer heat insulation materials is adopted, so that the whole structure can not shrink or even freeze in the process of transmitting the ultralow-temperature medium in the main shaft, and the problem of various low-temperature failures of parts such as an internal motor, a bearing and the like is avoided.
Drawings
FIG. 1 is a schematic structural view of an ultra-low temperature medium internal injection type electric spindle;
FIG. 2 is a hollow spindle construction incorporating a vacuum insulation mandrel;
in the figure: 1.1-hollow main shaft; 1.2-vacuum heat insulation core shaft; 1.3-hollow shank; 1.4-spindle outer housing; 1.5-end cap; 1.6-ultralow temperature rotary joint; 1.7-disc spring; 1.8-hollow shaft motor rotor magnetic pole; 1.9-hollow shaft motor stator core and winding; 1.10-pulling claw; 1.11-broach ejector rod mechanism; 1.12-hollow ring hydraulic cylinder; 1.13-tail cap; 1.14 — front bearing set; 1.15-rear bearing set; 1, a-a hollow main shaft and end cover threaded hole; b-front threaded hole of outer shell; 1, c-threaded holes of the outer shell and the tail cover; 2.1-the front outer end face of the hollow main shaft; 2.2-the outer end face of the tail part of the hollow main shaft; 2.3-inner conical surface of front end of hollow main shaft; 2.4-inner arc surface of hollow handle; 2.5-the front outer wall surface of the vacuum heat insulation core shaft; 2.6-the outer end face of the middle part of the vacuum heat insulation mandrel; 2.7-the outer wall surface of the rear part of the hollow main shaft; 2.8-the outer wall surface of the rear part of the vacuum heat insulation mandrel; 2.9-the outer end face of the middle part of the hollow main shaft.
Detailed Description
The following detailed description of the embodiments of the invention refers to the accompanying drawings and claims.
In the embodiment, liquid nitrogen is used as a cooling medium, the vacuum heat-insulating mandrel 1.2 is based on a special stainless steel metal material, and the diameter of the thinnest end is 14 mm; the hollow knife handle 1.3 adopts HSK-A100 type customized processing hollow channel, and adds heat insulation material on the inner cavity surface; the ultralow temperature bearing is assembled in the ultralow temperature rotary joint 1.6, and the ultralow temperature rotary joint can normally operate at the temperature of-196 ℃ by adopting a high-nitrogen stainless steel material.
The assembling and installing process of the ultralow temperature medium internal injection type electric spindle is as follows: as shown in attached figures 1 and 2, in the first step, a pulling claw 1.10 and a broach ejector rod mechanism 1.11 are arranged at the front end of a vacuum heat insulation mandrel 1.2 in an interference manner and are ensured to be attached; the pulling claw 1.10 is tightened by a binding belt and is ensured to be in a closed state; the thinner end of the vacuum heat insulation mandrel 1.2 is parallelly arranged along the opening at the rear part of the hollow main shaft 1.1 structure until the outer wall surface 2.5 at the front end of the vacuum heat insulation mandrel is attached to the end surface at the rear part of the broach ejector rod mechanism 1.11; sleeving an end cover 1.5 along the tail part of the vacuum heat insulation mandrel 1.2 until the left end surface of the end cover is attached to the outer wall surface 2.7 at the rear part of the hollow main shaft; screwing four bolts into the threaded holes 1.a at 15 N.m by using a torque wrench;
secondly, processing a groove with an angle of 60 degrees and a depth of 15mm on the outer wall of the hollow main shaft, putting the magnetic pole of the hollow shaft motor rotor into a heating box, heating to 180-200 ℃, taking out, and vertically installing the magnetic pole into the groove on the 2.9 outer end face of the middle part of the hollow main shaft in an interference manner to be completely attached; sleeving a stator core and a winding 1.9 of the hollow shaft motor into the assembled hollow main shaft to ensure that the stator core and the winding are concentric; heating the bearing group 1.14 and the bearing group 1.15 in oil to 75 ℃, loading and tightly attaching the bearing group 1.14 along the outer end face 2.1 at the front part of the hollow main shaft, and loading and tightly attaching the bearing group 1.21 along the outer end face 2.2 at the rear part of the hollow main shaft; the hollow main shaft 1.1 with the assembled bearing group and the internal structure is arranged from the front end of the main shaft outer shell 1.4, and a torque plate is screwed into a threaded hole 1.b in the front of the outer shell by a torque of 18 N.m; the hollow annular hydraulic cylinder 1.12 is installed along the tail part of the vacuum heat insulation mandrel 1.2, four bolts are sequentially screwed into the threaded hole 1.c at the tail part of the outer shell, and a torque wrench is adopted to screw down at the torque of 18 N.m;
when the ultralow temperature medium internal-spraying type electric main shaft works, the hollow tool shank 1.3 is firstly installed into the hollow main shaft 1.1 from the front end of the main shaft, and the outer conical surface of the tool shank is ensured to be attached to the inner conical surface 2.3 at the front end of the hollow main shaft; connecting an external liquid nitrogen supply with an ultralow-temperature rotary joint 1.5 at the tail part of the main shaft; opening the main shaft regulating and controlling device to enable the main shaft to start rotating, and keeping the rotating speed at 5000rpm, wherein the hollow main shaft 1.1, the vacuum heat insulation core shaft 1.2, the hollow cutter handle 1.3 and the ultralow temperature rotary joint 1.5 are in a synchronous rotating state; and opening an external liquid nitrogen supply switch, inputting liquid nitrogen through the ultralow-temperature rotary joint 1.5, conveying the liquid nitrogen to the foremost end of the hollow cutter handle 1.3 through the vacuum heat insulation core shaft 1.2, pre-cooling for 10-12min, and ensuring that the liquid nitrogen jet state reaches a temperature state. When the automatic tool loosening action is executed, the spindle shaft stops rotating, the tail hydraulic cylinder 1.12 is compressed to the limit position, the end cover 1.5 under the action of hydraulic pressure drives the vacuum heat insulation liquid nitrogen conveying mandrel 1.2 and the broach ejector rod mechanism 1.11 to move towards the front end of the spindle along the axial direction, the disc spring 1.7 is in a compressed state at the moment until the pulling claw 1.10 moves to the inner arc surface 2.4 of the hollow tool shank, the mandrel pulling claw automatically opens, the tool shank and the spindle are in a separated state at the moment, and the tool shank can be automatically replaced by an external tool magazine at the moment; when the automatic broaching is executed, after the tool holder is arranged at the position of the tool holder of the main shaft by the external tool magazine, the hydraulic cylinder 1.12 is restored to the initial position before compression, the vacuum heat insulation core shaft 1.2 and the broaching tool ejector rod mechanism 1.11 move to the tail part of the main shaft along the axial direction under the action of the tension of the disc spring 1.7 until the broaching claw 1.10 moves to the limiting position, and the tool holder and the main shaft are in a tensioned state at the moment.
According to the invention, through effective heat insulation structure design and material selection, the problems of cold deformation and failure of main shaft materials, internal motors, bearings and other parts when the ultralow temperature medium is transmitted in the main shaft are solved, the loss rate of liquid nitrogen medium in the main shaft is greatly reduced, and a foundation is laid for reliable operation of ultralow temperature internal injection type high-speed processing equipment. While the invention has been described in detail and with particular reference thereto, it should be understood that the invention is not limited to the details of construction and that various changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (1)
1.A vacuum mandrel rotary type ultralow-temperature medium internal spraying type electric spindle is characterized by comprising a spindle main body structure, an ultralow-temperature medium supply and heat insulation conveying structure; the main structure of the main shaft mainly comprises a hollow main shaft (1.1), a hollow tool handle (1.3), a main shaft outer shell (1.4), a hollow shaft motor rotor magnetic pole (1.8), a hollow shaft motor stator core and winding (1.9) and a hollow annular hydraulic cylinder (1.12); the ultra-low temperature medium supply and heat insulation conveying structure comprises a vacuum heat insulation core shaft (1.2) and an ultra-low temperature rotary joint (1.6);
the hollow main shaft (1.1) is a main body structure of the main shaft rotation, and a hollow channel processed inside provides an installation space for the vacuum heat insulation core shaft (1.2); the outer end face (2.1) at the front part of the hollow main shaft and the outer end face (2.2) at the tail part of the hollow main shaft are positioning faces of the hollow main shaft (1.1); the front bearing group (1.14) and the rear bearing group (1.15) play a role in supporting the hollow main shaft (1.1) and internal parts thereof to rotate; the outer conical surface of the hollow tool handle (1.3) is attached to the inner conical surface (2.3) at the front end of the hollow main shaft, so that the positioning and clamping effects are achieved;
the vacuum heat insulation core shaft (1.2) is a conveying channel of the ultralow temperature medium and is used for suppressing heat exchange between the ultralow temperature medium and a main shaft material and internal parts; the vacuum heat insulation core shaft (1.2) bears the tension of the disc spring (1.7) and the thrust of the hydraulic cylinder (1.12) at the same time, so that the axial movement of the vacuum heat insulation core shaft (1.2) during automatic tool changing is realized; the outer wall surface (2.5) at the front end of the vacuum heat insulation mandrel and the outer wall surface (2.8) at the rear part of the vacuum heat insulation mandrel are positioning surfaces of the vacuum heat insulation mandrel (1.2), and key grooves are processed on the surface of the outer end surface (2.6) at the middle part of the vacuum heat insulation mandrel to realize the fixation with the disc spring (1.7);
the hollow knife handle (1.3) is internally provided with a hollow channel, so that the vacuum heat insulation core shaft (1.2) passes through the interior of the hollow knife handle and is directly communicated to the foremost end of the knife handle, the leakage of an ultralow temperature medium in the hollow knife handle (1.3) is avoided, and the inner arc surface (2.4) of the hollow knife handle, which is processed in the hollow knife handle (1.3), is a limiting surface after the pulling claw (1.10) is opened;
when the vacuum mandrel rotary type ultralow-temperature medium internal-spraying electric spindle is assembled, a pulling claw (1.10) and a broach ejector rod mechanism (1.11) are arranged along the front end of a vacuum heat insulation mandrel (1.2) in an interference manner; vertically installing a disc spring (1.7) from an opening at the tail part of a hollow main shaft (1.1); a vacuum heat insulation mandrel (1.2) is arranged from an opening at the tail part of a hollow main shaft (1.1) until the outer wall surface (2.5) at the front end of the vacuum heat insulation mandrel is tightly attached to a broach ejector rod mechanism (1.11); the end cover (1.5) is arranged along the tail part of the vacuum heat insulation core shaft (1.2) until the end cover is attached to the outer wall surface (2.7) of the tail part of the hollow main shaft, and a torque wrench is used for screwing and fastening bolts into the hollow main shaft and the threaded hole (1.a) of the end cover; sleeving a hollow shaft motor rotor magnetic pole (1.8) into the outer end face (2.9) in the middle of the hollow main shaft from the tail part of the vacuum main shaft (1.1) and completely attaching; sleeving a hollow shaft motor stator core and a winding (1.9) into a hollow main shaft (1.1) and ensuring that the hollow shaft motor stator core and the winding are concentric; sleeving a hollow annular hydraulic cylinder (1.12) along the tail part of the vacuum heat insulation mandrel (1.2) until the hollow annular hydraulic cylinder is attached to the end cover (1.5); sleeving a tail cover (1.13) along the tail part of the vacuum heat insulation mandrel (1.2) until the tail part is attached to the right end surface of the hollow annular hydraulic cylinder (1.12), and screwing a bolt into the outer shell and the tail cover threaded hole (1.c) by using a torque wrench for fastening; a front bearing group (1.14) is arranged along the outer end face (2.1) of the front part of the hollow main shaft and tightly attached with force; a rear bearing group (1.15) is arranged along the outer end face (2.2) of the rear part of the hollow main shaft and tightly attached with force; a hollow main shaft (1.1) with a bearing set and an internal structure assembled is installed from the front end of a main shaft outer shell (1.4), and a bolt is screwed into a threaded hole (1.b) in the front of the outer shell; finally, connecting the ultralow temperature rotary joint (1.6) with the tail joint of the vacuum heat insulation core shaft (1.2);
when the vacuum mandrel rotary type ultralow-temperature medium internal-spraying electric main shaft works, a hollow tool shank (1.3) is installed into the vacuum main shaft (1.1) from the front end of the main shaft, and the outer conical surface of the tool shank is ensured to be attached to the inner conical surface (2.3) at the front end of the hollow main shaft; opening an external main shaft regulating and controlling device to enable a main shaft to start rotating, keeping the rotating speed at 5000rpm, starting an external ultralow temperature supply system, and at the moment, forcibly inputting ultralow temperature media from the outside to an ultralow temperature rotary joint (1.6) and conveying the ultralow temperature media to the foremost end of a hollow cutter handle (1.3) through a vacuum heat insulation core shaft (1.2); keeping the main shaft rotating and ultra-low temperature medium spraying for 10-12min to complete integral debugging and precooling.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110398606.5A CN112975459A (en) | 2021-04-12 | 2021-04-12 | Vacuum mandrel rotary type ultralow-temperature medium internal spraying type electric spindle |
| PCT/CN2021/089103 WO2022217636A1 (en) | 2021-04-12 | 2021-04-23 | Rotary ultra-low temperature medium internal spray-type electric spindle for vacuum mandrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110398606.5A CN112975459A (en) | 2021-04-12 | 2021-04-12 | Vacuum mandrel rotary type ultralow-temperature medium internal spraying type electric spindle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112975459A true CN112975459A (en) | 2021-06-18 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110398606.5A Withdrawn CN112975459A (en) | 2021-04-12 | 2021-04-12 | Vacuum mandrel rotary type ultralow-temperature medium internal spraying type electric spindle |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112975459A (en) |
| WO (1) | WO2022217636A1 (en) |
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- 2021-04-12 CN CN202110398606.5A patent/CN112975459A/en not_active Withdrawn
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| 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 |
| CN107282950A (en) * | 2017-06-30 | 2017-10-24 | 广州市昊志机电股份有限公司 | A kind of high-speed permanent magnetic synchronization Zuan Gong centers electro spindle |
| CN110666529A (en) * | 2019-11-11 | 2020-01-10 | 安阳德一机床附件制造有限公司 | Automatic tool changing high-speed electric spindle with middle hole filled with water |
| CN111360285A (en) * | 2020-05-14 | 2020-07-03 | 深圳市兴旺达科技有限公司 | High-speed electric spindle |
| CN111408744A (en) * | 2020-05-15 | 2020-07-14 | 东莞市显隆电机有限公司 | Knife handle type air-float high-speed electric spindle |
| CN112059680A (en) * | 2020-09-16 | 2020-12-11 | 清远市天一数控设备有限公司 | Novel high-speed spindle broach mechanism with self-locking and force-increasing pulling claws |
| CN214162598U (en) * | 2020-12-28 | 2021-09-10 | 濮阳丸松精密机械有限公司 | HSK-A100 vertical electric spindle |
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| WO2022217636A1 (en) | 2022-10-20 |
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