KR20140080836A - Machinie tool with tool turret - Google Patents

Machinie tool with tool turret Download PDF

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Publication number
KR20140080836A
KR20140080836A KR1020120149090A KR20120149090A KR20140080836A KR 20140080836 A KR20140080836 A KR 20140080836A KR 1020120149090 A KR1020120149090 A KR 1020120149090A KR 20120149090 A KR20120149090 A KR 20120149090A KR 20140080836 A KR20140080836 A KR 20140080836A
Authority
KR
South Korea
Prior art keywords
turret
drive shaft
gear
servo motor
tool
Prior art date
Application number
KR1020120149090A
Other languages
Korean (ko)
Inventor
주태환
정철안
Original Assignee
두산인프라코어 주식회사
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 두산인프라코어 주식회사 filed Critical 두산인프라코어 주식회사
Priority to KR1020120149090A priority Critical patent/KR20140080836A/en
Publication of KR20140080836A publication Critical patent/KR20140080836A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B23B29/24—Tool holders for a plurality of cutting tools, e.g. turrets
    • B23B29/32—Turrets adjustable by power drive, i.e. turret heads
    • B23B29/323—Turrets with power operated angular positioning devices
    • 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
    • B23Q16/00—Equipment for precise positioning of tool or work into particular locations not otherwise provided for
    • B23Q16/02—Indexing equipment
    • 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
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/54—Arrangements or details not restricted to group B23Q5/02 or group B23Q5/22 respectively, e.g. control handles
    • B23Q5/56—Preventing backlash

Abstract

An embodiment of the present invention relates to a machine tool having a turret tool bar, wherein the machine tool according to the embodiment of the present invention includes a drive shaft having a tooth formed at an end thereof and has a maximum rotational driving force of 500 Torr (kg.cm) A servo motor and a turret gear connected to the drive shaft of the servo motor and having a reduction ratio falling within a range of 1/6 to 1/12 of the drive shaft having the teeth formed at the end thereof, And a turret including a turret head.

Description

[0001] MACHINERY TOOL WITH TOOL TURRET WITH TURET TOOL [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine tool, and more particularly, to a machine tool having a turret tool.

Machine tools are machines that are used for machining metal or non-metal workpieces to various shapes and sizes using various cutting or non-cutting methods.

Machine tools are classified into Turning Center and Machining Center depending on the machining method. Among them, the turning center is provided with a turret tool holder which is equipped with a plurality of tools and indexes necessary tools in the machining process.

The turret tool pivots the turret through a hydraulic motor or servomotor, which receives power from the motor using a number of gears.

However, noise generated from multiple gears to transmit power is an obstacle to achieving a quiet working environment. In addition, backlash accumulated in a plurality of gears causes shaking in the turret tool band, and there is a problem in that the speed of the motor must be reduced in order to control such shaking. And space for supporting multiple gears and additional components are also required.

Embodiments of the present invention provide a machine tool having a turret tool bar that simplifies the structure and minimizes backlash.

According to an embodiment of the present invention, a machine tool having a turret tool bar includes a servo motor including a drive shaft having teeth formed at an end thereof and having a maximum rotational driving force of 500 Torr (kg.cm) or more, A turret gear including a turret gear connected to the drive shaft of the servo motor and a turret head integrally coupled to the turret gear and having a gear ratio within a range of 1/6 to 1/12 of the drive shaft formed with the toothed gear, .

The tooth formed on the end of the drive shaft of the turret gear and the servo motor can be directly engaged.

And an idle gear interposed between the turret gear and a tooth formed at an end of the drive shaft of the servo motor, the idle gear being engaged with the teeth formed on the turret gear and the drive shaft.

The servo motor can maintain a rotational driving force of 500 Torr (kg.cm) or more in a section where the rotational speed exceeds 0 rpm and 1000 rpm or less.

The servomotor may further include a backlash adjusting unit for correcting a backlash of a tooth formed at an end of the driving shaft.

According to the embodiment of the present invention, a machine tool having a turret tool can simplify the structure and minimize backlash.

1 is a partial perspective view of a machine tool having a turret tool bar according to a first embodiment of the present invention.
2 is a cross-sectional view of Fig.
Fig. 3 is a graph showing the rotational driving force of the servomotor of Fig. 1. Fig.
4 is a partial perspective view of a machine tool having a turret tool bar according to a second embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

In addition, in the various embodiments, elements having the same configuration are represented by the same reference symbols in the first embodiment, and in the other second embodiment, only the configurations different from those of the first embodiment are described .

The drawings are schematic and illustrate that they are not drawn to scale. The relative dimensions and ratios of the parts in the figures are shown exaggerated or reduced in size for clarity and convenience in the figures, and any dimensions are merely illustrative and not restrictive. And to the same structure, element or component appearing in more than one drawing, the same reference numerals are used to denote similar features.

The embodiments of the present invention specifically illustrate ideal embodiments of the present invention. As a result, various variations of the illustration are expected. Thus, the embodiment is not limited to any particular form of the depicted area, but includes modifications of the form, for example, by manufacture.

Hereinafter, a machine tool having a turret tool stand 101 according to a first embodiment of the present invention will be described with reference to Figs. 1 and 2. Fig. 1 and 2 show the turret 10 and the servo motor 20 as a center.

1 and 2, a machine tool 101 having a turret tool bar according to a first embodiment of the present invention includes a turret 10 and a servomotor 20. As shown in Fig.

In the first embodiment of the present invention, the servo motor 20 includes a motor main body 21, an encoder 24, and a drive shaft 25. Further, the servomotor 20 further includes a backlash adjuster 29 provided on one side of the motor main body 21.

The drive shaft 25 is formed with a tooth 257 at an end thereof. That is, in the first embodiment of the present invention, the drive shaft 25 of the servo motor 20 operates as a direct gear. The backlash adjuster 29 corrects the backlash of the tooth 257 formed at the end of the drive shaft 25.

The encoder 24 provides rotation information for accurately indexing the turret 10 to the motor main body 21 by the servo motor 20 and rotates the drive shaft 25 based on this information.

Further, in the first embodiment of the present invention, the servo motor 20 has a maximum rotational driving force of 500 Torr (kg.cm) or more.

The turret 10 includes a turret head 11 and a turret gear 17.

A tool is mounted on the turret head 11 and the turret gear 17 is connected to the drive shaft 25 of the servo motor 20 to receive the rotational force from the servo motor 20. [ The turret head 11 and the turret gear 17 are integrally joined.

Further, in the first embodiment of the present invention, the machine tool 101 equipped with the turret tool stand further includes an idle gear 30. [

2, the machine tool 101 having the turret tool bar may further include an idle gear support bearing 38 for supporting the idle gear 30. [

The idle gear 30 is disposed between the turret gear 17 and the teeth 257 formed on the drive shaft 25 of the servo motor 20 and is provided with teeth 257 formed on the turret gear 17 and the drive shaft 25, Lt; / RTI >

The idle gear 30 transmits power from the drive shaft 25 of the servo motor 20 to the turret gear 17 of the turret 10. [ On the other hand, the rotational power transmitted from the servo motor 20 to the turret gear 17 by the idle gear 30 is changed in the opposite direction.

The idle gear support bearing 38 for supporting the idle gear 30 and the idle gear 30 is moved from the turret 10 to the servo motor 20 in the course of driving the turret 10, Thereby relieving impact loads and moments transmitted to the vehicle. Thus, the durability and life of the servomotor 20 can be improved.

The specific operation principle of the idle gear 30 will be described. The turret 10 is clamped so as to overcome the cutting resistance in the machining process after indexing, and is unclamped again for indexing after machining. At this time, the turret 10 is instantaneously accelerated, rotated at high speed, and rapidly stopped again. In this process, the turret gear 17 is deformed by stress, and the deforming force is transmitted to the idle gear 30 engaged with the turret gear 17.

Since the idle gear 30 is supported by the idle gear support bearing 38, the deformation force transmitted from the turret gear 17 is absorbed by the idle gear support bearing 38. [ Therefore, the influence of the deformation force generated in the turret gear 17 on the drive shaft 25 of the servo motor 20 can be minimized.

Further, the machine tool 101 having the turret tool bar according to the first embodiment of the present invention further includes an idle gear adjusting portion 39. The idle gear adjusting portion 39 includes a tooth 257 formed on the drive shaft 25 of the servo motor 20 together with the backlash adjusting portion 29 of the servo motor 20 and the idle gear 30 and the turret gear 17, Can be adjusted so that they are engaged with each other with suitable backlash.

In the first embodiment of the present invention, the final reduction ratio between the drive shaft 25 and the turret gear 17 of the servomotor 20 having the teeth formed at the end portion 257 falls within a range of 1/6 to 1/12. Therefore, the machine tool 101 having the turret tool bar according to the first embodiment of the present invention can realize a compact size.

If the final reduction ratio between the drive shaft 25 and the turret gear 17 of the servo motor 20 having the end tooth 257 is reduced to less than 1/6 the use efficiency of the servo motor 20 is lowered, The overall performance of the device is degraded. On the other hand, when the final reduction gear ratio between the drive shaft 25 and the turret gear 17 of the servo motor 20 having the end tooth 257 is larger than 1/6, there is a limit in realizing a compact size.

As shown in FIG. 3, the machine tool 101 having the turret tool bar according to the first embodiment of the present invention rotates at a speed of 500 Torr (kg.cm) or more in a section where the rotational speed exceeds 0 rpm and 1000 rpm or less, A servomotor 20 having a driving force is used.

Therefore, the machine tool 101 having the turret tool bar according to the first embodiment of the present invention is capable of reducing the reduction gear ratio by minimizing the intermediate gears used by the servomotor 20 to transmit the rotational power to the turret 10 And can be retrieved by using the servo motor 20 having a high torque rotating driving force in the low speed section.

On the other hand, when the rotational driving force of the servo motor 20 is less than 500 torr (kg.cm) in a range exceeding 0 rpm and less than 1000 rpm, the overall performance of the machine tool 101 is lowered.

As described above, the machine tool 101 having the turret tool bar according to the first embodiment of the present invention uses the servo motor 20 having the teeth 257 formed directly on the drive shaft 25, It is possible not only to eliminate the gear-driven noise due to the assembly error or tolerance generated when assembling with the gear 25, but also to maximize the space utilization.

In the first embodiment of the present invention, the teeth 257 formed on the drive shaft 25 of the servo motor 20 are engaged with the idle gear 30 to transmit rotational power to the turret gear 17. That is, by removing all intermediate gears other than the idle gear 30, the use of the intermediate gears is minimized, so that it is possible to work in a quiet and quiet environment.

In addition, in the first embodiment of the present invention, by reducing the number of gears used for the servomotor 20 to transmit the rotational power to the turret 10, accumulated backlash can be minimized, Shaking can be suppressed as much as possible. Therefore, the machine tool 101 equipped with the turret tool bar according to the first embodiment of the present invention can drive the servo motor 20 at a higher speed, so that the tool change time can be effectively shortened.

In the machine tool 101 having the turret tool holder according to the first embodiment of the present invention, the backlash accumulated between the servo motor 20 and the turret 10 is reduced, so that the turret 10 can be controlled more precisely can do.

With such a configuration, the machine tool 101 having the turret tool bar according to the first embodiment of the present invention can simplify the structure and minimize the backlash.

Hereinafter, a machine tool 102 having a turret tool bar according to a second embodiment of the present invention will be described with reference to FIG.

4, the machine tool 102 having the turret tool bar according to the second embodiment of the present invention is mounted on the turret gear 17 of the turret 10 and the drive shaft 25 of the servo motor 20, The teeth 257 are directly engaged with each other. That is, in the second embodiment of the present invention, the idle gear 30 shown in Fig. 1 is omitted.

In the second embodiment of the present invention, the reduction ratio between the drive shaft 25 and the turret gear 17 of the servomotor 20 having the teeth formed at the end portion 257 falls within a range of 1/6 to 1/12.

As described above, according to the second embodiment of the present invention, since the teeth 257 formed on the driving shaft 25 of the thermo-motor 20 are directly engaged with the turret gear 17, the use of gears is further reduced, It is possible to minimize not only the backlash but also the cumulative backlash.

Further, the noise and accumulated backlash can be further reduced, so that the servo motor 20 can be driven more quickly and the turret 10 can be controlled more precisely.

Further, since the space utilization is maximized, the machine tool 102 having the turret tool bar according to the second embodiment of the present invention can realize a more compact size.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. will be.

It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive, the scope of the invention being indicated by the appended claims, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

10: turret 11: turret head
17: Turret gear 20: Servo motor
21: motor body 24: encoder
25: drive shaft 29: backlash adjuster
30: idle gear 38: idle gear support bearing
39: idle gear adjustment portion
257: Tooth type
101: Machine tools

Claims (5)

1. A machine tool having a turret tool base,
A servomotor including a driving shaft having a tooth formed at an end thereof and having a maximum rotational driving force of 500 Torr (kg.cm) or more; And
A turret gear connected to the drive shaft of the servo motor and having a reduction ratio falling within a range of 1/6 to 1/12 as compared with a drive shaft having a tooth formed at the end, and a turret head integrally coupled with the turret gear and mounted with a tool Turret
And a turret tool rest. The method of claim 1,
Wherein the turret gear and the tooth formed at the end of the drive shaft of the servo motor are directly engaged with each other. The method of claim 1,
Further comprising an idle gear disposed between the turret gear and a tooth formed at an end of the drive shaft of the servo motor and meshed with a tooth formed on the turret gear and the drive shaft, respectively. The method of claim 1,
Wherein the servo motor maintains a rotational driving force of 500 Torr (kg.cm) or more in a section where the rotational speed exceeds 0 rpm and 1000 rpm or less. 5. The method according to any one of claims 1 to 4,
Wherein the servomotor further comprises a backlash adjuster for correcting a backlash of a tooth formed at an end of the drive shaft.
KR1020120149090A 2012-12-20 2012-12-20 Machinie tool with tool turret KR20140080836A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120149090A KR20140080836A (en) 2012-12-20 2012-12-20 Machinie tool with tool turret

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120149090A KR20140080836A (en) 2012-12-20 2012-12-20 Machinie tool with tool turret

Publications (1)

Publication Number Publication Date
KR20140080836A true KR20140080836A (en) 2014-07-01

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KR1020120149090A KR20140080836A (en) 2012-12-20 2012-12-20 Machinie tool with tool turret

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190083092A (en) 2018-01-03 2019-07-11 두산공작기계 주식회사 Tool turret of machine tool
KR20230157015A (en) 2022-05-09 2023-11-16 주식회사 디엔솔루션즈 Turret clamping confirmation apparatus of machine tool and method for setting thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190083092A (en) 2018-01-03 2019-07-11 두산공작기계 주식회사 Tool turret of machine tool
KR20230157015A (en) 2022-05-09 2023-11-16 주식회사 디엔솔루션즈 Turret clamping confirmation apparatus of machine tool and method for setting thereof

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