GB2617973A - Carbon composite material shaft and carbon composite material motor spindle comprising same - Google Patents

Carbon composite material shaft and carbon composite material motor spindle comprising same Download PDF

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Publication number
GB2617973A
GB2617973A GB2311033.1A GB202311033A GB2617973A GB 2617973 A GB2617973 A GB 2617973A GB 202311033 A GB202311033 A GB 202311033A GB 2617973 A GB2617973 A GB 2617973A
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GB
United Kingdom
Prior art keywords
shaft
composite material
carbon composite
space part
reinforcing bar
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
GB2311033.1A
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GB202311033D0 (en
Inventor
Gyu Kim Kang
Yeon Kim Sang
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Individual
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Individual
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Filing date
Publication date
Priority claimed from KR1020210016094A external-priority patent/KR102279051B1/en
Priority claimed from KR1020210029818A external-priority patent/KR102264898B1/en
Application filed by Individual filed Critical Individual
Publication of GB202311033D0 publication Critical patent/GB202311033D0/en
Publication of GB2617973A publication Critical patent/GB2617973A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/003—Couplings; Details of shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • F16C3/023—Shafts; Axles made of several parts, e.g. by welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • F16C3/026—Shafts made of fibre reinforced resin
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/14—Casings; Enclosures; Supports
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/02—Casings or enclosures characterised by the material thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2206/00—Materials with ceramics, cermets, hard carbon or similar non-metallic hard materials as main constituents
    • F16C2206/02—Carbon based material
    • F16C2206/06—Composite carbon material, e.g. carbon fibre reinforced carbon (C/C)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/30—Material joints
    • F16C2226/40—Material joints with adhesive

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Turning (AREA)

Abstract

The present invention relates to: a carbon composite material shaft in which a reinforcing rod made of a carbon composite material constitutes the inside of a space part of a shaft body made of a metal material; and a carbon composite material motor spindle, in which a support pipe of a housing consists of an inner tube made of a metal material and an outer tube made of a carbon composite material, comprising a carbon composite material shaft. While the weight of the shaft and the housing can be reduced, the strength of the shaft and the housing can be increased, and the thermal variation characteristics of the shaft and the housing can be improved.

Description

CARBON COMPOSITE MATERIAL SHAFT AND CARBON COMPOSITE MATERIAL MOTOR SPINDLE COMPRISING SAME
Field of the invention
P-1 This invention relates to a carbon composite material shaft having a new structure with improved thennal variation characteristics while reducing weight, and a carbon composite material motor spindle including the same.
Background of the invention
[2] In general, as shown in FIG. 1, a motor spindle used in machine tools or the like is composed of a housing 1, a shaft 2 which is provided rotatably inside the housing 1, and one end of which extends to the outside of the housing 1, and a rotor 3a and a stator 3b which are provided on the outer circumferential surface of the shaft 2 and the inner circumferential surface of the housing 1, and thus the shall 2 is rotated when power is applied.
[S] The housing I is composed of a support cylinder part la extending in the front and rear direction, and front cover members lb and rear cover members lc coupled to the front and rear ends of the support cylinder part la, respectively, and the support cylinder part la and the front cover members lb and rear cover members lc are made of a high-strength metal material.
[4] In addition, a through hole penetrating the front and rear surfaces is fonned in the central portion of the front cover member lb. [5] In addition, as shown in FIG. 2, the shaft 2 is composed of a round rod shape of a metal material with high strength extending in the front and rear direction, an enlarged diameter portion is fonled in the central portion, and coupling portions are formed at both of the front and rear ends so that it is rotatably coupled to the inside of the housing I, and the front end portion extends forward of the housing 1 through the through hole of the front cover member lb. [6] In addition, the shaft 2 is made of a metal material having high strength and is configured to ensure sufficient strength.
[7] However, since the shaft 2 and the housing 1 of the motor spindle including the shaft 2 and the entire of the shaft 2 are made of a metal material, there have been problems in that they are not only heavy, but also have a large expansion rate due to temperature change.
[8] Therefore, there is a need for a new method capable of solving these problems.
[9] [Prior Art Document] [Patent Document]
[101 Korean Patent No. 10-0428375
SUMMARY OF THE INVENTION
[11] This invention is to solve the above problems, and an object of this invention is to 15 provide a carbon composite material shaft having a new structure with improved thermal variation characteristics while reducing weight, and a carbon composite material motor spindle including the same.
[12] In order to achieve the above object, a carbon composite material shaft according to this invention is characterized in that it includes a shaft main body 21 composed of a rod shape made of a metal material and having a space part 21a formed therein and a reinforcing bar 22 made of a carbon composite material inserted and fixed into the space part 21a of the shaft main body 21, wherein the reinforcing bar 22 is fixed to the inside of the space part 21a by the adhesive.
[13] Further, in the carbon composite material shaft 20 according to this invention, the reinforcing bar 22 is configured by winding a carbon fiber 22b around the circumferential surface of a shaft member 22a made of a carbon material.
[14] Further, in the carbon composite material shaft 20 according to this invention, 1151 the shaft member 22a made of a carbon material of the reinforcing bar 22 is a sealed core material or a core material in which a hollow is formed in the longitudinal direction of the shaft.
1161 Further, in the carbon composite material shaft 20 according to this invention, 1171 an insulating material 22d may be further provided on the contact surface between the reinforcing bar 22 and the shaft main body 21, and the insulating material 22d may be separately provided on the inner circumferential surface of the space part 21a of the shaft main body 21 or formed by applying an insulating material to the inner circumferential surface of the space part 21a of the shaft main body 21, or may be separately provided on the outer circumferential surface of the reinforcing bar 22 or formed by coating an insulating material on the carbon fiber 22b wound around the shaft member 22a of the reinforcing bar 22, or may be formed by alternately stacking the carbon fiber 22b and the insulating material wound around the shaft member 22a of the reinforcing bar 22.
1181 Further, in the carbon composite material shaft 20 according to this invention, [19] the space part 21a formed in the shaft main body 21 is configured so that the front end portion thereof is closed and the rear end portion thereof is open, a communication hole 2Ib connected to the space part 2 la is formed in the central portion of the front end portion of the shaft main body 21, and a cap 23 coupled to the rear end portion of the space part 2Ia is further included.
[20] Further, in the carbon composite material shaft 20 according to this invention, [21] the space part 21a has a ring-shaped concave groove 24 formed on the inner circumferential surface of the rear end portion thereof to correspond to the position of the rear end portion of the reinforcing bar 22 so that, when the adhesive is injected into the space part 21a, the adhesive is configured to be temporarily stored inside the concave groove 24. Here, depending on the type of adhesive used, if the reinforcing rod 22 with an adhesive applied to the outer circumferential surface and the rear end portion is inserted into the space part 21a, the adhesive applied to the rear end of the reinforcing rod 22 can be pushed and temporarily stored inside the concave groove 24.
1221 Further, the carbon composite material shaft 20 according to this invention is characterized in that it is manufactured through the steps of inserting the reinforcing bar 22 into the space part 21a of the shaft main body 21, injecting the adhesive into the space part 2Ia so that the adhesive permeates the reinforcing bar 22, thereby hardening the reinforcing bar 22 and, at the same time, fixing the reinforcing bar 22 to the inside of the space part 21a, and discharging an extra adhesive to the outside of the space part 21a through the communication hole 2 lb, and coupling the cap 23 to the rear end portion of the space part 2 I a.
[23] Furthermore, a carbon composite material motor spindle according to this invention including: 1241 a housing 10 configured by including a support cylinder part II extending in the front and rear direction, and front cover members 12 and rear cover members 13 coupled to front and rear ends of the support cylinder part 11, respectively; 1251 a carbon composite material shaft 20 which is rotatably provided inside the housing 10 and of which one end is provided to extend to the outside of the housing 10; and [26] a rotor 31 and a stator 32 which are provided on the outer circumferential surface of the carbon composite material shaft 20 and the inner circumferential surface of the housing 10, [27] wherein the support cylinder part 11 of the housing 10 is composed of an inner cylinder body II a made of a metal material and an outer cylinder body 11 b made of a carbon composite material coupled to the outer side of the inner cylinder body lla 1281 wherein the carbon composite material shaft 20 is configured by including a shaft main body 21 made of a metal material having a space part 21a formed therein, and a reinforcing bar 22 made of a carbon composite material inserted and fixed into the space part 21a of the shaft main body 21.
1291 Further, in the carbon composite material motor spindle according to this invention, 1301 the outer cylinder body lib is configured by winding a carbon fiber around the outer circumferential surface of the inner cylinder body lla and then impregnating and curing the carbon fiber with an adhesive.
1311 Further, in the carbon composite material motor spindle according to this invention, [321 the reinforcing bar 22 of the carbon composite material shaft 20 is fixed to the inside of the space part 21a by the adhesive.
p31 Further, in the carbon composite material motor spindle according to this invention, [34] the reinforcing bar 22 of the carbon composite material shaft 20 is configured by winding a carbon fiber 22b around the circumferential surface of the shaft member 22a made of a carbon material.
P5] Further, in the carbon composite material motor spindle according to this invention, 1361 the shaft member 22a made of a carbon material of the reinforcing bar 22 of the carbon composite material shaft 20 is a sealed core material or a core material in which a hollow is formed in the longitudinal direction of the shaft.
p7I Further, in the carbon composite material motor spindle according to this invention, 1381 the reinforcing bar 22 and the shaft main body 21 of the carbon composite material shaft 20 may have an insulating material 22d further provided on a contact surface therebetween, and the insulating material 22d is separately provided on the inner circumferential surface of the space part 21a of the shaft main body 21, formed by applying the insulating material to the inner circumferential surface of the space part 21a of the shaft main body 21, or separately provided on the outer circumferential surface of the reinforcing bar 22, or formed by coating the insulating material on the carbon fiber 22b wound around the shaft member 22a of the reinforcing bar 22, or formed by alternately stacking the carbon fiber 22b and the insulating material wound around the shaft member 22a of the reinforcing bar 22 1391 Further, in the carbon composite material motor spindle according to this invention, [40] the space part 21a formed in the shaft main body 21 of the carbon composite material shaft 20 is configured such that the front end portion is closed and the rear end portion is open, a communication hole 2 lb connected to the space part 2 la is formed in the central portion of the front end portion of the shaft main body 21, and a cap 23 coupled to the rear end portion of the space part 21a is further included, and 1411 a ring-shaped concave groove 24 is formed on the inner circumferential surface of the rear end portion of the space part 21a to correspond to the position of the rear end portion of the reinforcing bar 22 so that, when the adhesive is injected into the space part 21a, the adhesive is configured to be temporarily stored inside the concave groove 24. Here, depending on the type of adhesive used, if the reinforcing rod 22 with an adhesive applied to the outer circumferential surface and the rear end portion is inserted into the space part 21a, the adhesive applied to the rear end of the reinforcing rod 22 can be pushed and temporarily stored inside the concave groove 24.
1421 Further, in the carbon composite material motor spindle according to this invention, 1431 the carbon composite material shaft 20 is manufactured through the steps of inserting the reinforcing bar 22 into the space part 21a of the shaft main body 21, injecting the adhesive into the space part 21a so that the adhesive permeates the reinforcing bar 22 to harden the reinforcing bar 22, and at the same time, the reinforcing bar 22 is fixed to the inside of the space part 21a, and discharging an extra adhesive to the outside of the space part 21a through the communication hole 21b, and coupling the cap 23 to the rear end portion of the space part 21a.
1441 In the carbon composite material shaft according to this invention, a reinforcing bar made of a carbon composite material is formed inside the space part of the shaft main body made of a metal material so that a weight reduction effect of 20 to 25% or more can be obtained compared to a conventional shaft entirely made of a metal material. In addition, there is an effect of improving the strength and improving the thermal variation characteristics of the shaft.
[451 Further, the carbon composite material shaft according to this invention has an effect of thermal variation of the shaft by configuring the carbon composite material shaft so that a hollow is formed in the shaft member of the reinforcing bar made of a carbon composite material in the axial direction and cooling water is supplied along the hollow to cool the heat generated according to the rotation of the shaft, and has the effect of preventing galvanic corrosion on the inner circumferential surface of the space part of the shaft main body by providing an insulating material to the carbon fiber wound around the inner circumferential surface of the space part of the shaft main body made of a metal material, the outer circumferential surface of the reinforcing bar made of the carbon composite material, or the shaft member, 1461 Further, the motor spindle according to this invention is composed of the inner cylinder body made of a metal material and an outer cylinder body made of a carbon composite material for the support cylinder part of the housing in addition to the above-mentioned carbon composite material shaft, and thus has effects capable of reducing the weight of the housing, improving the strength of the housing, and improving the thermal variation characteristics of the housing.
BRIEF DESCRIPTION OF THE DRAWINGS
[47] FIG. 1 is a side cross-sectional view showing a conventional motor spindle [481 FIG. 2 is a side cross-sectional view showing a shaft provided in the motor spindle of Figure 1.
[491 FIG. 3 is a side cross-sectional view showing a carbon composite material motor spindle according to this invention.
[50] FIG. 4 is a side cross-sectional view showing the support cylinder part of the carbon composite material motor spindle according to this invention.
[511 FIG. 5 is a side cross-sectional view showing the inner cylinder body of the support cylinder part of the carbon composite material motor spindle according to this invention [52] FIG. 6 is a side cross-sectional view showing a carbon composite material shaft according to this invention [53] FIG. 7 is a side cross-sectional view showing an exploded state of the carbon composite material shaft according to this invention.
[541 FIGS. 6 to 10 are reference views showing a method for manufacturing a carbon composite material shaft according to this invention.
[55] FIG. 11 is a side cross-sectional view and a front cross-sectional view showing an example in which a hollow is formed in the shaft member of the carbon composite material shaft according to this invention [56] FIGS. 12A and 12B arc views exemplifying that an insulating material is provided in the carbon composite material shaft according to this invention.
DETAILED DESCRIPTION OF THE INVENTION
[571 Hereinafter, this invention will be described in detail based on the accompanying exemplary drawings.
[58] FIGS. 3 to 12 show a carbon composite material shaft according to this invention and a carbon composite material motor spindle including the same. in this invention, a carbon composite material shaft and a carbon composite material motor spindle are carbon composite hybrid materials made of metal material and carbon composite materials.
1591 The carbon composite material motor spindle according to this invention is configured by including a housing 10, a carbon composite material shaft 20, a rotor 31, and a stator 32.
1601 At this time, the housing 10 is composed of a support cylinder part II extending in the front and rear direction, and front cover members 12 and rear cover members 13 coupled to the front and rear ends of the support cylinder part 11, respectively.
[61] In addition, according to this invention, the support cylinder part 11 is composed of an inner cylinder body 1 I a made of a metal material, and an outer cylinder body 1lb made of a carbon composite material coupled to the outer side of the inner cylinder body 1 la.
1621 As shown in FIGS. 4 and 5, the inner cylinder body I la is configured to have the same overall shape as the support cylinder part provided in the housing I of the conventional motor spindle, but a concave portion is formed on the outer circumferential surface of the middle portion.
1631 The outer cylinder body 1lb is configured by winding a carbon fiber around the concave portion, and then impregnating and curing the carbon fiber with an adhesive.
[64] As the carbon fiber, PAN-based carbon fiber or pitch-based carbon fiber may be used, and an appropriate one may be selected depending on the properties to be imparted to the housing 10, or other various types of carbon fibers may be selected and used.
[65] A mixture of a liquid epoxy resin and a hardening material is used as the adhesive. It is not limited to the illustrated adhesives.
1661 Therefore, after winding the carbon fiber to a predetermined thickness around the concave portion of the inner cylinder body 11a, a liquid adhesive is applied to the carbon fiber so that the adhesive permeates the carbon fiber, and when dried for a certain period of time, the adhesive is hardened to fix the carbon fiber, and thus the outer cylinder body Ilb is manufactured so that it is firmly fixed to the concave portion of the inner cylinder body lla.
1671 In addition, as shown in FIGS. 9 and 10, the carbon composite material shaft 20 is formed in a rod shape made of a metal material and is composed of a shaft main body 21 having a space part 21a formed therein, and a reinforcing bar 22 made of a carbon composite material inserted and fixed into the space part 21a of the shaft main body 21, and the reinforcing bar 22 is fixed to the space part 21a by the adhesive 1681 To explain this in detail, the shaft main body 21 has a rod shape, and a space part 21a having a closed front end portion and an opened rear end portion is formed in the longitudinal direction inside the shaft main body 21.
1691 The space part 21a is configured in the form of a hole having a circular cross section in which inner diameters of the front and rear ends are constant.
1701 At this time, a communication hole 2 lb connected to the space part 2Ia is formed in the central portion of the front end portion of the shaft main body 21, and a screw thread is formed at the rear end portion of the space part 21a so that a cap 23 made of a metal material may be screw-coupled thereto, or the cap 23 made of a metal material may be coupled to the rear end portion of the space part 21a in a shrinkage/cooling fitting method.
1711 In the shrinkage/cooling fitting method, when it is inserted into the rear end portion of the space part 21a after shrinking the cap 23 made of a metal material by cooling it using liquid nitrogen, etc., it is tightly coupled to the rear end portion to seal the space part 21a as the shrunk metal material expands overtime, 1721 Although, in this invention, only screw coupling or shrinkage/cooling fitting coupling is exemplified as a method of coupling the cap to the rear end portion of the space part 21a, but it is not limited thereto, and it goes without saying that various sealing means may be applied.
[731 The reinforcing bar 22 is configured by winding a carbon fiber 22b around a circumferential surface of a shaft member 22a made of a carbon material.
[741 The shaft member 22a uses a carbon composite material rod or a pultrusion carbon composite material rod [75] Thc carbon fiber 22b uses PAN-based carbon fiber or pitch-based carbon fiber.
[761 As such a carbon fiber 22b, an appropriate one may be selected and used depending on properties to be imparted to the shaft 20.
[771 Therefore, as shown in FIG. 8, the reinforcing bar 22 may be produced by allowing the carbon fiber 22b to be wound a constant thickness on the circumferential surface of the shaft member 22a while rotating the shaft member 22a at a constant speed by fixing the shaft member 22a to a chuck or the like.
[781 At this time, the outer diameter of the reinforcing bar 22 is adjusted to correspond to the inner diameter of the space part 21a.
[79] In addition, the carbon fiber 22b wound around the outer circumferential surface of the reinforcing bar 22 is cured by an adhesive and simultaneously fixed to the inside of the space part 2 la.
[801 At this time, as the adhesive, a mixture of a liquid epoxy resin and a hardening material is used.
[81] In addition, as shown in FIG. 11, the carbon composite material shaft 20 according to this invention may be made of a core material in which the shaft member 22a of the reinforcing bar 22 is sealed, or may be fanned of a core material which has a certain thickness, has a hollow 22c with a predetermined diameter formed therein in the longitudinal direction of the shaft, and has an open front or rear end of the hollow.
1821 Cooling water may be supplied to the hollow 22c of the shaft member 22a formed in this way, and it is possible to co& the heat generated according to the rotation of the shaft by cooling water in real time. According to the configuration of such a shaft, thermal variation of the shaft may be prevented, and operation efficiency is increased by preventing an increase in operation tact time of the shaft due to heat generated in the shaft operation process.
1831 In addition, as shown in FIG. 12, the carbon composite material shaft 20 according to this invention may further include an insulating material 22d on die contact surface between the reinforcing bar 22 and the space part 21a of the shaft main body 21 made of a met& 10 material.
1841 In this way, the durability of die carbon composite material shaft 20 may be improved by providing the insulating material 22d on the contact surface between the reinforcing bar 22 and the shaft main body 21 and accordingly preventing galvanic corrosion from occurring on the inner circumferential surface of the space part 21a of the shaft main body 21 made of a metal material.
1851 At this time, the insulating material 22d may be fonned by a method such as separately providing it on the inner circumferential surface of the space part 21a of the shaft main body 21 made of a metal material, or applying and forming an insulating material onto the inner circumferential surface of the space part 2Ia of the shaft main body 21, separately providing it on the outer circumferential surface of the reinforcing bar 22 made of a carbon composite material, coating and forming an insulating material on the carbon fiber 22b wound around the shaft member 22a, or alternately stacking the carbon fiber 22b and the insulating material.
[86] Such a method for manufacturing the carbon composite material shaft 20 will be described as follows.
1871 First, the shaft main body 21 and the reinforcing bar 22 are manufactured.
1881 In addition, as shown in FIG. 9, after fixing the shaft main body 21 so that the communication hole 2!b faces downward, the reinforcing bar 22 is inserted into the space part 2!a of the shaft main body 2 I. 1891 In addition, as shown in FIG. 10, a sufficient amount of adhesive is injected into the space part 2Ia using the injector 33.
[901 In this way, when the adhesive is injected into the space part 21a, the adhesive is absorbed into the carbon fiber 22b of the reinforcing bar 22 while it is flowing down so that an effect of impregnating the entire reinforcing bar 22 with the adhesive is obtained.
1911 At this time, an extra adhesive out of the adhesive injected into the space part 2Ia is discharged to the outside of the space part 21a through the communication hole 21b as shown by arrows in FIG. 10.
1921 In addition, when it is confirmed that the adhesive injected into the space part 2Ia is discharged through the communication hole 2 lb, the cap 23 is coupled to the rear end portion of the space part 2Ia by a screw coupling or a shrinkage/cooling fitting method to seal the rear end portion of the space part 21a.
[931 In this way, when time elapses after the cap 23 is coupled to the rear end portion of the space part 21a, the adhesive is cured, and the reinforcing bar 22 is reinforced and the reinforcing bar 22 is fixed to the inside of the space part 21a at the same time by the adhesive cured in this way.
NI In the carbon composite material shaft 20 manufactured and completed in this way, since the reinforcing bar 22 is fixed to the inside of the space part 21a by the adhesive, the carbon composite material shaft 20 not only obtains a weight reduction effect of 20 to 25% or more compared to the conventional shaft 20 entirely made of a metal material, but also has improved strength and elasticity and has appropriate thermal variation characteristics at the same time.
19..5] Although, in this invention, when manufacturing the carbon composite material shaft 20, the reinforcing rod 22 is inserted into the space part 2Ia of the shaft main body 21, and then the adhesive is injected into the space part 21a using an injector 33, but it is not limited to this. Depending on the type of the adhesive used, it goes without saying that after applying an adhesive to the outer circumferential surface and rear end of the reinforcing rod 22 of the shaft main body 21, the reinforcing rod 22 with the adhesive can be inserted into the space 21a of the shaft main body 21.
1961 Further, in addition to the carbon composite material shaft 20 inserted into the housing 10, the support cylinder part I I of the housing ID includes an inner cylinder body ha made of a metal material and the outer cylinder body lib made of a carbon composite material coupled to the outer side of the inner cylinder body lla so that the carbon composite material motor spindle can improve the strength of the housing 10 and the thermal variation characteristics of the housing 10 while reducing the weight of the housing 10.
1971 Although this invention has been described above with reference to the drawings, those skilled in the art can variously implement modification and variation of this invention without departing from the spirit and scope of this invention described in the claims described below. Therefore, if the varied implementation basically includes the elements of the claims of this invention, all of them should be considered to be included in the technical scope of this invention.

Claims (15)

  1. CLAIMS1 A carbon composite material shaft comprising: a shaft main body (21) composed of a rod shape made of a metal material and having a space part (21a) formed therein; and a reinforcing bar (22) made of a carbon composite material inserted and fixed into the space part (21a) of the shaft main body (21), wherein the reinforcing bar (22) is fixed to the inside of the space part (21a) by an adhesive.
  2. 2. The carbon composite material shaft of claim 1, wherein the reinforcing bar (22) is configured by winding a carbon fiber (22b) around the circumferential surface of a shaft member (22a) made of a carbon material.
  3. 3. The carbon composite material shaft of claim 2, wherein the shaft member (22a) made of a carbon material of the reinforcing bar (22) is a sealed core material or a core material in which a hollow is formed in the longitudinal direction of the shaft.
  4. 4. The carbon composite material shaft of claim 1, wherein the reinforcing bar (22) and the shaft main body (21) have an insulating material (22d) further provided on the contact surface therebetween, and the insulating material (22d) is separately provided on the inner circumferential surface of the space part (21a) of the shaft main body (21) or formed by applying an insulating material to the inner circumferential surface of the space part (21a) of the shaft main body (21), or is separately provided on the outer circumferential surface of the reinforcing bar (22) or formed by coating an insulating material on the carbon fiber (22b) wound around the shaft member (22a) of the reinforcing bar (22), or is formed by alternately stacking the carbon fiber (22b) and the insulating material wound around the shaft member (22a) of the reinforcing bar (22).
  5. 5. The carbon composite material shaft of claim 1, wherein the space part (21a) formed in the shaft main body (21) is configured so that the front end portion thereof is closed and the rear end portion thereof is opened, a communication hole (21b) connected to the space part (21a) is formed in the central portion of the front end portion of the shaft main body (21), and a cap (23) is coupled to the rear end portion of the space part (2 la).
  6. 6. The carbon composite material shaft of claim 1, wherein the space part (21a) has a ring-shaped concave groove (24) fanned on the inner circumferential surface of the rear end portion thereof to correspond to the position of the rear end portion of the reinforcing bar (22) so that, when the adhesive is injected into the space part (21a), the adhesive is configured to be temporarily stored inside the concave groove (24).
  7. 7. The carbon composite material shaft of claim 1, wherein the carbon composite material shaft is manufactured through the steps of inserting the reinforcing bar (22) into the space part (2 la) of the shaft main body (2 I), injecting the adhesive into the space part (2 la) so that the adhesive permeates the reinforcing bar (22), thereby hardening the reinforcing bar (22) and, at the same time, fixing the reinforcing bar (22) to the inside of the space part (21a), and discharging an extra adhesive to the outside of the space part (21a) through the communication hole (21b), and coupling the cap (23) to the rear end portion of the space part (21a).
  8. 8. A carbon composite material motor spindle comprising: a housing (10) configured by including a support cylinder part (11) extending in the front and rear direction and front cover members (12) and rear cover members (13) coupled to front and rear ends of the support cylinder part (11), respectively; a carbon composite material shaft (20) which is rotatably provided inside the housing (10) and of which one end is provided to extend to the outside of the housing (10); and a rotor (31) and a stator (32) which are provided on the outer circumferential surface of the carbon composite material shaft (20) and the inner circumferential surface of the housing (10), wherein the support cylinder part (II) of the housing (10) is composed of an inner cylinder body (11a) made of a metal material and an outer cylinder body (11b) made of a carbon composite material coupled to the outer side of the inner cylinder body (11a), wherein the carbon composite material shaft (20) is configured by including a shaft main body (21) made of a metal material having a space part (21a) famed therein, and a reinforcing bar (22) made of a carbon composite material inserted and fixed into the space part (21a) of the shaft main body (21).
  9. 9. The carbon composite material motor spindle of claim 8, wherein the outer cylinder body (11 b) is configured by winding a carbon fiber around the outer circumferential surface of the inner cylinder body (11a) and then impregnating and curing the carbon fiber with an adhesive.
  10. 10. The carbon composite material motor spindle of claim 8, wherein the reinforcing bar (22) of the carbon composite material shaft (20) is fixed to the inside of the space part (21a) by the adhesive.
  11. 11. The carbon composite material motor spindle of claim 8, wherein the reinforcing bar (22) of the carbon composite material shaft (20) is configured by winding a carbon fiber (22b) around the circumferential surface of the shaft member (22a) made of a carbon material.
  12. 12. The carbon composite material motor spindle of claim 8, wherein the shaft member (22a) made of a carbon material of the reinforcing bar (22) of the carbon composite material shaft (20) is a sealed core material or a core material in which a hollow is formed in the longitudinal direction of the shaft.
  13. 13. The carbon composite material motor spindle of claim 8, wherein the reinforcing bar (22) and the shaft main body (21) of the carbon composite material shaft (20) have an insulating material (22d) further provided on a contact surface therebetween, and the insulating material (22d) is separately provided on the inner circumferential surface of the space part (21a) of the shaft main body (21) or formed by applying an insulating material to the inner circumferential surface of the space part (21a) of the shaft main body (21), or is separately provided on the outer circumferential surface of the reinforcing bar (22) or formed by coating an insulating material on the carbon fiber (22b) wound around the shaft member (22a) of the reinforcing bar (22), or is fonned by alternately stacking the carbon fiber (22b) and the insulating material wound around the shaft member (22a) of thc reinforcing bar (22).
  14. 14. The carbon composite material motor spindle of claim 8, wherein the space part (21a) formed in the shaft main body (21) of the carbon composite material shaft (20) is configured such that the front end portion is closed and the rear end portion is opened, a communication hole (21b) connected to the space part (21a) is formed in the central portion of the front end portion of the shaft main body (21), and a cap (23) is coupled to the rear end portion of the space part (21a), and a ring-shaped concave groove (24) is formed on the inner circumferential surface of the rear end portion of the space part (21a) to correspond to the position of the rear end portion of the reinforcing bar (22) so that, when the adhesive is injected into the space part (21a), the adhesive is configured to be temporarily stored inside the concave groove (24).
  15. 15. The carbon composite material motor spindle of claim 8, wherein the carbon composite material shaft (20) is manufactured through the steps of inserting the reinforcing bar (22) into the space part (21a) of the shaft main body (21), injecting the adhesive into the space part (21a) so that the adhesive permeates the reinforcing bar (22), thereby hardening the reinforcing bar (22) and, at the same time, fixing the reinforcing bar (22) to the inside of the space part (21a), and discharging an extra adhesive to the outside of the space part (21a) through the communication hole (2 lb), and coupling the cap (23) to the rear end portion of the space part (21a).
GB2311033.1A 2021-02-04 2022-01-26 Carbon composite material shaft and carbon composite material motor spindle comprising same Pending GB2617973A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR1020210016094A KR102279051B1 (en) 2021-02-04 2021-02-04 carbon composite shaft
KR1020210029818A KR102264898B1 (en) 2021-03-08 2021-03-08 carbon composite motor spindle
PCT/KR2022/001400 WO2022169187A1 (en) 2021-02-04 2022-01-26 Carbon composite material shaft and carbon composite material motor spindle comprising same

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GB202311033D0 GB202311033D0 (en) 2023-08-30
GB2617973A true GB2617973A (en) 2023-10-25

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GB2311033.1A Pending GB2617973A (en) 2021-02-04 2022-01-26 Carbon composite material shaft and carbon composite material motor spindle comprising same

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EP (1) EP4290743A1 (en)
GB (1) GB2617973A (en)
WO (1) WO2022169187A1 (en)

Citations (7)

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Publication number Priority date Publication date Assignee Title
KR100740592B1 (en) * 2004-12-24 2007-07-19 한국과학기술원 Hybrid shaft and method manufacturing the same
JP2013022674A (en) * 2011-07-20 2013-02-04 Nsk Ltd Main spindle device
KR20140115442A (en) * 2013-03-19 2014-10-01 삼성테크윈 주식회사 A motor
JP2018167869A (en) * 2017-03-30 2018-11-01 三井化学東セロ株式会社 Package for food and method for using package for food
KR102132818B1 (en) * 2019-05-03 2020-07-13 김병하 composite roller
KR102264898B1 (en) * 2021-03-08 2021-06-11 김강규 carbon composite motor spindle
KR102279051B1 (en) * 2021-02-04 2021-07-16 김강규 carbon composite shaft

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100428375B1 (en) 2001-06-15 2004-04-28 현대자동차주식회사 Spindle for machine tools
WO2018167869A1 (en) * 2017-03-15 2018-09-20 マーレエレクトリックドライブズジャパン株式会社 Rotating body, electric compressor, and turbine power generator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100740592B1 (en) * 2004-12-24 2007-07-19 한국과학기술원 Hybrid shaft and method manufacturing the same
JP2013022674A (en) * 2011-07-20 2013-02-04 Nsk Ltd Main spindle device
KR20140115442A (en) * 2013-03-19 2014-10-01 삼성테크윈 주식회사 A motor
JP2018167869A (en) * 2017-03-30 2018-11-01 三井化学東セロ株式会社 Package for food and method for using package for food
KR102132818B1 (en) * 2019-05-03 2020-07-13 김병하 composite roller
KR102279051B1 (en) * 2021-02-04 2021-07-16 김강규 carbon composite shaft
KR102264898B1 (en) * 2021-03-08 2021-06-11 김강규 carbon composite motor spindle

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