KR101612129B1

KR101612129B1 - attachment of the machine tool

Info

Publication number: KR101612129B1
Application number: KR1020090128557A
Authority: KR
Inventors: 최춘규
Original assignee: 두산인프라코어 주식회사
Priority date: 2009-12-22
Filing date: 2009-12-22
Publication date: 2016-04-12
Also published as: KR20110071868A

Abstract

The present invention relates to attachment of a machine tool.

The attachment of the machine tool according to the present invention is provided with a housing 230 which is installed inside the upper body 110 to be rotatable through a bearing 230 and descends by hydraulic action to be disengaged from the upper body 110, A drive spindle 130 rotatably installed in the housing shaft 170, a drive spindle 130 mounted on the upper end of the drive spindle 130, coupled with a ram spindle 32 on the upper side, A first index member 140 formed with an inner circumferential surface of the housing shaft 170 and a second index member 140 formed on the outer circumferential surface of the housing shaft 170. The inner circumferential surface of the housing shaft 170 is partially inserted, A second index member 150 formed with a gear 152 and a second index member 150 installed at one side of the housing shaft 170 and the second index member 150 so that the housing shaft 170 and the second index member 150 The key portion As shown in FIG.

Attachment, Sentinel Machine, Indexing, Clamping, Unclamping, Indexing

Description

[0002] Attachment of the machine tool [0003]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to attachment of a machine tool, and more particularly, to attachment of a machine tool to be mounted on a ram spindle unit of a machine tool to machine four sides of the workpiece.

In general, the machine tool is additionally equipped with an attachment to perform other types of machining in addition to the dedicated machining.

In particular, the attachment is additionally mounted on the end of the ram spindle unit, and the axis directions of the ram spindle and the attachment spindle of the ram spindle unit may be different from each other. For example, both axis directions may be perpendicular to each other, So that it is possible to vertically process it.

However, the workpiece is three-dimensional, and the sides have sides on the front, rear, left and right sides, and the direction of the attachment spindle must be indexed in order to process these various sides.

The configuration for indexing in the conventional attachment will be described with reference to the accompanying drawings 1 and 2.

1 is a view for explaining a conventional attachment, in which (a) shows a direction in which a drive spindle is seen, (b) shows a direction in which a fastening nut is seen, and FIG. 2 Section.

1 and 2, the attachment 10 can be divided into an upper body 12 and a lower body 14. A scale 12a is formed at a boundary between the upper body 12 and the lower body 14, Can be formed.

The drive spindle 16 is installed in the upper body 12 in the vertical direction and the attachment spindle 18 is installed in the lower body 14. The drive spindle 16 and the attachment spindle 18 And is rotated by interlocking with the gear structure.

The T groove 24 is formed on the lower side of the upper body 12 in an annular shape concentric with the center of the drive spindle 16 described above.

In addition, the lower body 14 is provided with a plurality of mounting holes 26 at positions corresponding to the T grooves 24 described above.

The T groove 22 is provided in the T groove 24. The T bolt 22 is passed through the mounting hole 26 to expose the male screw portion to the outside and the nut 20 is attached to the exposed male screw portion. Respectively.

That is, the upper body 12 and the lower body 14 are fixed by tightening the plurality of nuts 20.

The ram spindle unit 30 of the machine tool on which the above-described attachment 10 is mounted will be described with reference to Fig. 3 attached hereto.

3 is a view for explaining a ram spindle.

3, a ram spindle 32 is provided below the ram spindle unit 30 and the ram spindle 32 is driven by a servo motor. In particular, numerical control is possible, .

When the attachment 10 is mounted on the ram spindle unit 30, the ram spindle 32 of the ram spindle unit 30 is engaged with the drive spindle 16 of the attachment 10, The rotary motion is transmitted to the attachment spindle 18 via the drive spindle 16 and rotates the tool mounted on the attachment spindle 18 to machine the work.

In order to index the conventional attachment 10 constructed as described above, the worker manually loosens the nut 20 loosely at the portion where the upper body 12 and the lower body 14 are fixed, and the upper body 12 is fixed The lower body 14 is rotated and indexed at a desired angle.

That is, although the conventional attachment 10 described above has the scale 12a on the outside, the worksite can be scaled by the cutting chips and cutting oil generated during the workpiece machining, It is a very difficult task to do.

In addition, the indexed values are not uniform and the quality of the machined workpieces is not uniform, resulting in a reduction in precision.

Further, there is a problem that the fatigue is increased by performing the indexing manually by the operator.

On the other hand, as described above, the conventional attachment 10 can be indexed so as to be turned in the direction of the attachment spindle 18, but the indexing is performed manually and takes a lot of time. As a result, the machining time of the workpiece is delayed There is a problem.

Accordingly, it is an object of the present invention to provide an apparatus and a method for indexing attachment spindles of a machine tool, which can perform indexing by the power provided by a ram spindle unit, thereby relieving operator fatigue and improving the accuracy of indexing, And to provide an attachment of a machine tool to improve the performance of the machine tool.

It is another object of the present invention to provide an attachment of a machine tool capable of speeding up the indexing operation so as to turn the orientation of the attachment spindle of the machine tool, thereby shortening the machining time of the workpiece.

The present invention has been made in view of the above problems, and it is an object of the present invention to at least partially solve the problems in the conventional arts. There will be.

According to an aspect of the present invention, there is provided an attachment of a machine tool, comprising: a housing shaft installed in an upper body to be rotatable through a bearing and lowered by a hydraulic action to release clamping from the upper body; A drive spindle rotatably installed inside the housing shaft; A first index member installed on an upper end of the drive spindle, an upper index member coupled to the ram spindle and having an external gear at an outer diameter, A second index member which is partially inserted into the inner diameter of the housing shaft and which is pressed by the ram spindle unit elastically and whose internal diameter is engaged with the external gear; And a key member installed at one side of the housing shaft and the second index member to prevent the housing shaft and the second index member from loosening.

A first flange formed at an upper outer diameter of the first index member; And a set screw which is engaged with the first flange so as to press the internal gear of the second index member to engage the external gear and the internal gear.

The apparatus may further include a guide bolt fastened on the second index member to press the second index member while pushing against the bottom surface of the ram spindle unit.

The details of other embodiments are included in the detailed description and drawings.

The attachment of the machine tool according to the present invention as described above can perform indexing using the power provided by the ram spindle unit when indexing is performed in the attachment of the machine tool, thereby alleviating fatigue of the worker .

Further, the attachment of the machine tool according to the present invention is indexed accurately by the power provided by the ram spindle unit, thereby improving the indexing accuracy and improving the quality of the workpieces.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings.

Throughout the description, the same reference numerals denote the same components, and the same reference numerals are assigned to the same components as those of the conventional technology, and a detailed description thereof will be omitted.

Hereinafter, attachment of a machine tool according to an embodiment of the present invention will be described with reference to FIGS. 4 and 5. FIG.

FIG. 4 is a view for explaining a standby state when the attachment of the machine tool according to the embodiment of the present invention is put on the automatic exchange apparatus, and FIG. 5 is a detailed sectional view of FIG.

4 and 5, the attachment of the machine tool according to the embodiment of the present invention includes the first and second index members 140 and 150 in the attachment 100.

More specifically, the lower body 120 of the upper body 110 is rotatable via a housing shaft 170, a drive spindle 130 is installed inside the housing shaft 170, A first index member 140 is provided on the upper side of the spindle 130 and a second index member 150 is provided on the upper side of the housing shaft 170.

The housing shaft 170 is fixed to the lower body 120 and the bearing 230 is disposed between the outer diameter of the housing shaft 170 and the inner diameter of the upper body 110.

The first index member 140 is formed with a circumscribed gear 142 at a lower outer diameter and a first flange 144 at an upper outer diameter of the first index member 140. The first flange 144 is provided with a set screw 160 .

When the attachment 100 is mounted on the ram spindle unit 30, the first index member 140 is engaged with the drive spindle 32 and the drive groove 140a, Power can be delivered.

An internal gear 152 is formed on the lower inner diameter of the second index member 150 so as to engage with the external gear 142. A second flange 154 is formed on the upper external diameter of the second index member 150, And a key hole 158 is formed at a position spaced apart from the spring receiving portion 156. In addition,

The spring 180 is housed in the spring housing portion 156 and the lower side of the spring 180 abuts against the upper surface of the housing shaft 170. The spring 180 elastically contacts the housing shaft 170, So that the second index member 150 is floated.

A key member 190 is provided at the upper end of the housing shaft 170 and a part of the key member 190 is inserted into the key hole 158 described above, 150 are rotated, the housing shaft 170 can be rotated, and the lifting movement of the second index member 150 described above does not affect the housing shaft 170.

In addition, the lower end of the set screw 160 may be fastened so as to protrude downward from the first flange 144, and in particular, the extent to which the set screw 160 is protruded can be varied. Can be maintained.

The lower end of the set screw 160 may be in contact with the upper surface of the internal gear 152 of the second index member 150 described above.

In addition, the attachment of the machine tool according to an embodiment of the present invention can fix and unlock the upper body 110 and the lower body 120 by hydraulic action, which will be described with reference to FIG.

6 is a view for explaining a hydraulic operation in an attachment of a machine tool according to an embodiment of the present invention.

6, a hydraulic line 200 is formed on one side of the housing shaft 170, a piston member 210 is provided on one side of the outer diameter of the housing shaft 170, and an outer diameter of the piston member 210 is Is disposed in the inner diameter of the upper body 110 described above.

A chamber 240 is formed between the bearing 230 and the piston member 210 so that the end of the hydraulic line 200 provides a working fluid to the chamber 240 do.

The ascending and descending device 220 may be installed on the lower side of the piston member 210 and may be mounted on the upper side of the upper body 110.

The above ascending and descending device 220 may be constituted by a thrust bearing and a spring, and the thrust bearing allows the housing shaft 170 to rotate smoothly with the pressure in the chamber 240 being smooth, When the pressure is extinguished, the restoring force acts in a direction to raise the thrust bearing.

That is, the up-return device 220 pushes up the housing shaft 170 from the upper body 110 when the pressure in the chamber 240 is extinguished.

Further, the ascending / descending device 220 can also function as a buffer when the housing shaft 170 is lowered by the pressure formed in the chamber 240.

The first and second couplings 260 and 262 are installed on the lower side of the upper body 110 and the lower side of the housing shaft 170 and the first and second couplings 260 and 262 When the first and second coupling rings 260 and 262 are opened, the upper body 110 and the housing shaft 170 are fixed without being able to move relative to each other. When the first and second coupling rings 260 and 262 are opened, The housing 110 and the housing shaft 170 can be relatively moved.

The engagement and disengagement of the first and second couplings 260 and 262 are related to the presence or absence of pressure build-up in the chamber 240. When the pressure is formed in the chamber 240, The first and second Kubic couplings 260 and 262 are opened and the first and second Kubik couplings 260 and 262 are engaged when the pressure in the chamber 240 is removed.

On the other hand, the guide bolt 155 can be further fastened to the upper side of the second flange 154. When the attachment 100 is mounted on the ram spindle unit 30, So that the head of the arm 155 comes into contact with the bottom surface of the ram spindle unit 30.

Hereinafter, the operation of the attachment 100 of the machine tool according to an embodiment of the present invention will be described with reference to FIGS. 4 to 8. FIG.

4 and 5 show the state in which the attachment 100 is put on the automatic exchange device 40 and is waiting.

Since the ram spindle 32 and the drive groove 140a have to be precisely engaged when the attachment 100 is mounted on the ram spindle unit 30, the first index member 140 must always be aligned in a certain direction, The location should be maintained.

The ram spindle 32 of the ram spindle unit 30 approaches in a phase aligned state in a specific direction by driving of the servo motor and the first index member 140 approaches the first attachment 100 It can be set at a time.

When the attachment 100 is in the standby state, the first and second coupling units 260 and 262 are engaged with each other, so that the upper body 110 and the housing shaft 170 are fixed. On the housing shaft 170, The upper body 110 and the lower body 120 are fixed to each other.

In addition, the drive spindle 130 and the first index member 140 installed inside the housing shaft 170 are fixedly installed so as not to change the height.

However, the above-mentioned second index member 150 is raised by the restoring force of the spring 180, whereby the internal gear 152 and the outer folding gear 142 are engaged with each other as shown in the detailed view of FIG. 5 .

That is, since the housing shaft 170 and the second index member 150 are coupled by the key member 190, the rotation of the second index member 150 And the internal gears 152 and the external gears 142 are engaged with each other, so that the drive grooves 140a are maintained in an aligned state.

Hereinafter, a state in which the attachment 100 is mounted on the ram spindle unit 30 and the drive spindle 130 is rotatable will be described with reference to FIG.

7 is a detailed sectional view showing a state in which a drive spindle is rotatable by a ram spindle in an attachment of a machine tool according to an embodiment of the present invention.

7, when the ram spindle unit 30 is mounted on the attachment 100, the bottom surface of the ram spindle unit 30 is brought into contact with the guide bolt 155 so that the guide bolt 155 is pressed, The second index member 150 is lowered.

That is, as the second index gear 150 is lowered, the engagement of the internal gear 152 and the external gear 142 is released so that the drive spindle 130 can rotate.

In addition, since the ram spindle 32 is aligned with the drive groove 140a, when the ram spindle 32 rotates, the drive spindle 130 is eventually rotated, thereby rotating the attachment spindle.

Thereafter, an indexing operation for switching the orientation of the attachment spindle in the attachment 110 can be performed, which will be described with reference to Fig. 8 attached hereto.

8 is a detailed sectional view showing an indexable state of an attachment spindle in an attachment of a machine tool according to an embodiment of the present invention.

The hydraulic oil can be supplied to the hydraulic line 200, and the hydraulic oil is supplied from the above-described ram spindle unit 30. [

As described above, when hydraulic oil is supplied to the hydraulic line 200, a pressure is generated in the chamber 240, whereby the engagement of the first and second coupling units 260 and 262 is released, .

When the housing shaft 170 is lowered, the first index member 140 descends together, whereby the external gear 142 and the internal gear 152 are engaged.

The set screw 160 provided on the first index member 140 presses the internal gear 152 of the second index member 150 so that the height at which the internal gear 152 and the external gear 142 mesh Lt; / RTI >

The drive spindle 130 is rotated by the driving of the ram spindle 32 and the rotational force is transmitted to the housing shaft 170 by the engagement of the internal gear 142 and the external gear 152, Is rotated.

That is, the axial direction of the attachment spindle is changed and indexed according to the rotation displacement of the housing shaft 170 described above.

When the indexing is completed, the pressure in the chamber 240 is removed, and the operation of the ascending / descending device 220 causes the housing shaft 170 to ascend.

Although the first index member 140 is raised by the height displacement equal to the height displacement of the housing shaft 170 while the second index member 150 is raised by the spring 180 and returned to the ram spindle unit 30 So that the upward displacement is limited.

That is, after the index is completed, as shown in FIG. 7, the drive spindle 130 is rotatable, and the upper body 110 and the lower body 120 are fixed so as not to mutually move.

As described above, the attachment 100 of the machine tool according to the embodiment of the present invention can easily perform the attachment indexing by the operation of the ram spindle 32 and the hydraulic action without the manual operation of the operator in the process of indexing do.

Therefore, the fatigue of the operator can be reduced, and in particular, the attachment indexing is performed by the numerical control of the servo motor, so that the product is uniform and the quality of the product is improved.

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.

The attachment of the machine tool according to the present invention can be used in indexing the axis of the tool mounted on the attachment in addition to the attachment to the ram spindle of the door type machine.

1 is a view for explaining a conventional attachment,

(a) shows the direction in which the drive spindle is visible,

(b) shows the direction in which the fastening nut is seen.

2 is a sectional view for explaining a conventional attachment.

3 is a view for explaining a ram spindle.

FIG. 4 is a view for explaining a standby state in which an attachment of a machine tool according to an embodiment of the present invention is placed on an automatic exchange apparatus.

5 is a detailed sectional view of Fig.

FIG. 7 is a detailed sectional view showing a state in which a drive spindle is rotatable by a ram spindle in an attachment of a machine tool according to an embodiment of the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS (S)

10: Attachment 12: upper body

12a: scale 14: lower body

16: drive spindle 18: attachment spindle

20: Nut 22: T Bolt

24: T groove 30: Ram spindle unit

32: Ram spindle 40: Tool changer

100: attachment 110: upper body

120: lower body 130: drive spindle

140, 150: first and second index members 142: external gears

144, 154: first and second flanges 152: internal gear

156: spring housing part 158: key hole

160: Set screw 170: Housing shaft

180: spring 190: key member

200: hydraulic line 210: piston member

220: ascending and descending device 230: bearing

240: chamber

260, 262: First and second Kubic couplings

Claims

A housing shaft (170) installed inside the upper body (110) through a bearing (230) so as to be rotatable and lowered by hydraulic action to release clamping from the upper body (110);

A drive spindle 130 rotatably installed in the housing shaft 170;

A first index member 140 installed at the upper end of the drive spindle 130 and coupled with the ram spindle 32 at an upper side and having an external gear 142 at an outer diameter;

A second index member 150 which is partially inserted into the inner diameter of the housing shaft 170 and is pressed down by the ram spindle unit 30 and has an internal gear 152 to be engaged with the external gear 142, ;

A key member 190 installed at one side of the housing shaft 170 and the second index member 150 to prevent the housing shaft 170 and the second index member 150 from loosening;

A first flange 144 formed at an upper outer diameter of the first index member 140; And

A set screw 160 is fastened to the first flange 144 to press the internal gear 152 of the second index member 150 to engage the external gear 142 and the internal gear 152, ;

The attachment of the machine tool.

delete

The method according to claim 1,

A guide bolt 155 fastened to the upper side of the second index member 150 to push the second index member 150 while pressing against the bottom surface of the ram spindle unit 30;

Wherein the attachment of the machine tool further comprises: