KR102507372B1 - Support device for boring spindle - Google Patents

Abstract

The present invention provides a support device for supporting a boring spindle disposed to be linearly movable forward in a milling spindle, comprising: a rear supporter that accommodates the boring spindle and is fixed to the milling spindle; a sleeve disposed on an outer circumferential surface of the rear supporter; and a front supporter accommodating a boring spindle, allowing the sleeve to be closely attached to and fixed to the outer circumferential surface of the rear supporter when threadedly engaged with the inner circumferential surface of the sleeve, and allowing the sleeve to move on the outer circumferential surface of the rear supporter when the coupling is released. It relates to a support device for a boring spindle including

Description

Boring spindle support device {SUPPORT DEVICE FOR BORING SPINDLE}

The present invention relates to a support device for a boring spindle, and more particularly, to a support device for a boring spindle having a rear supporter, a sleeve, and a front supporter and having an improved support structure.

In general, a machine tool refers to a machine used for the purpose of processing a metal/non-metal workpiece into a desired shape and dimension using an appropriate tool by various cutting processing methods or non-cutting processing methods.

Various types of machine tools, including turning centers, vertical/horizontal machining centers, door type machining centers, Swiss turns, electric discharge machines, horizontal type NC boring machines, CNC lathes, and multi-tasking machines, are widely used in various industrial fields to suit the purpose of the work. It is being used.

Among machine tools, a multi-tasking machine refers to a turning center equipped with a multifunctional automatic tool changer (ATC) and tool magazine that performs various types of machining such as turning, drilling, tapping, and milling. In a multi-tasking machine, an operator loads or replaces tools necessary for machining by manually loading the tools into the tool magazine.

In general, various types of machine tools currently in use have a control panel to which numerical control (NC) or computerized numerical control (CNC) technology is applied. Such a control panel has various function switches or buttons and a monitor.

In addition, the machine tool has a table on which the material, which is a workpiece, is seated and transported for processing, a pallet for preparing the workpiece before processing, a spindle that rotates with a tool or workpiece combined, a tailstock for supporting the workpiece, etc. provide etc.

In general, in a machine tool, a table, a tool post, a main shaft, a tailstock, a resting ball, etc. are provided with a feed unit that feeds along a feed axis to perform various machining operations.

Also, in general, machine tools use a plurality of tools for various processing, and a tool magazine or a turret is used as a tool storage space for storing and storing a plurality of tools.

These machine tools use a plurality of tools for various processing, and a tool magazine is used in the form of a tool storage area for storing and storing a plurality of tools.

In addition, in general, machine tools are provided with an automatic pallet changer (APC) to minimize non-processing time. An Automatic Pallet Changer (APC) automatically exchanges pallets between the workpiece processing area and the workpiece installation area. A workpiece may be mounted on the pallet.

Also, in general, a machine tool includes an automatic tool changer (ATC) for withdrawing or re-accommodating a specific tool from a tool magazine according to a command of a numerical controller to improve productivity of the machine tool.

The boring machine as one aspect of such a machine tool can process a deep hole by making the W-axis linear motion in the milling spindle, or facilitate milling while avoiding interference with the workpiece.

In particular, among machine tools, the aforementioned boring type can perform more diverse hole processing and milling processing using W-axis movement, but when the boring spindle protrudes a lot from the milling spindle, deflection occurs due to the load of the boring spindle itself, or Vibration may occur, which may cause problems in machining precision.

Korean Patent Publication No. 10-2011-0069633 (Title of Invention: Device for Maintaining Spindle Support Pressure of Machine Tool) provides a technical idea to solve this problem.

Specifically, the prior art patent has a boring spindle that rotates and performs linear motion inside the milling spindle, and a bush support disposed between the milling spindle and the boring spindle to support the boring spindle and a hydraulic pressure for supporting the bush support. wealth may be included.

However, according to the prior art, since the bush support is disposed on the spindle with a fixed length, there is a problem in that it is difficult to flexibly deal with the cutting process by protruding the boring spindle with various lengths.

That is, if the bush support is made long to compensate for the deflection of the boring spindle, the W-axis cannot be used as much as the length of the bush support, and the interference section with the workpiece increases. In the case of a long protrusion on the shaft, deflection or vibration may occur, which may cause a problem in machining precision.

In addition, as the length of the conventional boring spindle support device is determined, the cost of the machine tool increases as the support device for various boring spindles must be manufactured for each equipment, and the maintenance cost increases as time and workers are required to install it. There were growing problems.

Moreover, the support device of the conventional boring spindle has a problem in that productivity decreases with the increase of non-processing time for mounting various support devices having different lengths as the length is determined, and causes inconvenience to the operator.

Republic of Korea Patent Publication No. 10-2011-0069633

The present invention has been made to solve the above problems, and an object of the present invention is to adjust the length of the support device so that the boring spindle does not sag or vibrate due to its own load even if the boring spindle protrudes long in the W axis. It is to provide a support device for a boring spindle capable of supporting and improving processing quality.

In order to achieve the object of the present invention, a support device for a boring spindle according to the present invention includes a rear supporter that accommodates the boring spindle and is fixed to the milling spindle; a sleeve disposed on an outer circumferential surface of the rear supporter; and a front supporter accommodating a boring spindle, allowing the sleeve to be closely attached to and fixed to the outer circumferential surface of the rear supporter when coupled with the inner circumferential surface of the sleeve, and allowing the sleeve to move on the outer circumferential surface of the rear supporter when uncoupled. can include

In addition, in another preferred embodiment of the boring spindle support device according to the present invention, the sleeve of the boring spindle support device has an inner circumferential surface formed identical to the outer circumferential surface of the rear supporter, and the outer circumferential surface is tapered to have a smaller outer diameter toward the front A sleeve body having a cylindrical shape to be formed; and a sleeve flange formed at the rear of the sleeve body.

In addition, in another preferred embodiment of the boring spindle support device according to the present invention, the front of the inner circumferential surface of the front supporter of the boring spindle support device, which is not opposed to the sleeve body, is formed in a shape corresponding to the outer circumferential surface of the boring spindle, , The rear facing the sleeve body may be formed in a shape corresponding to the outer circumferential surface of the sleeve body.

In addition, in another preferred embodiment of the boring spindle support device according to the present invention, a male thread is formed on the sleeve body adjacent to the sleeve flange of the boring spindle support device, and a female thread is formed on the inner circumferential surface of the rear of the front supporter can

In addition, in another preferred embodiment of the boring spindle support device according to the present invention, the sleeve body of the boring spindle support device has a plurality of open slots formed long in the axial direction so that the front of the sleeve body is opened at a predetermined interval from each other. can be formed with

In addition, in another preferred embodiment of the boring spindle support device according to the present invention, the bottom surface of the sleeve flange of the boring spindle support device is fastened with a wrench for rotating the sleeve clockwise or counterclockwise. At least two of these may be formed.

In addition, in another preferred embodiment of the boring spindle support device according to the present invention, a threaded hole formed in the direction of the rear supporter is formed on the outer circumferential surface of the sleeve flange of the boring spindle support device, and the sleeve is fastened to the threaded hole. It may further include a fixing piece for fixing the sleeve to the rear supporter.

In addition, in another preferred embodiment of the boring spindle support device according to the present invention, the rear supporter of the boring spindle support device includes a cylindrical rear body; and a rear flange formed at the rear of the rear body and bolted to the milling spindle.

In addition, in another preferred embodiment of the boring spindle support device according to the present invention, a guide slot is formed in the axial direction in the rear body of the boring spindle support device, and the front supporter is placed in the guide slot to It may further include a guide pin to limit the extension distance of.

In addition, in another preferred embodiment of the boring spindle support device according to the present invention, the boring spindle support device may further include a ring-shaped fixing flange fastened to the front surface of the front supporter.

In the boring spindle support device according to the present invention, a sleeve is disposed between the rear supporter and the front supporter, and the length capable of supporting the boring spindle can be varied depending on whether the sleeve and the front supporter are fastened. The cutting process can be performed by protruding the spindle, and thus there is an effect of improving the machining precision.

In addition, the boring spindle support device according to the present invention reduces the manufacturing cost of the support device because it does not require separate manufacturing for each length of the boring spindle as the length of the support device capable of supporting the boring spindle is varied. Due to the device, there is an effect that can promote miniaturization and compactness of the entire machine tool.

Moreover, the boring spindle support device according to the present invention does not need to install a separate support device for each equipment as the length of the support device capable of supporting the spindle is varied, eliminating the time and work process for installing them individually. It has the effect of reducing maintenance costs and preventing resource waste.

In addition, the boring spindle support device according to the present invention effectively supports boring spindles having various lengths by varying the length of the support device capable of supporting the boring spindle, thereby reducing non-processing time to maximize productivity, and There is an effect that can promote the convenience of.

1 shows a perspective view of a reduced support device for a boring spindle according to an embodiment of the present invention.
Figure 2 shows a cross-sectional side view of Figure 1;
Figure 3 shows a view of releasing the coupling of the sleeve and the front supporter with a wrench to extend the support device of the boring spindle according to the embodiment of the present invention in the state of FIG.
4 shows a perspective view of an extended boring spindle support device according to an embodiment of the present invention.
Figure 5 shows a cross-sectional side view of Figure 4;
6 shows a perspective view of a sleeve according to an embodiment of the present invention.

Hereinafter, a support device for a boring spindle according to an embodiment of the present invention will be described in detail with reference to drawings. The embodiments introduced below are provided as examples to sufficiently convey the spirit of the present invention to those skilled in the art. Accordingly, the present invention may be embodied in other forms without being limited to the embodiments described below. And, in the drawings, the size and thickness of the device may be exaggerated for convenience. Like reference numbers indicate like elements throughout the specification.

Advantages and features of the present invention, and methods for achieving them, will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only these embodiments make the disclosure of the present invention complete, and the common knowledge in the art to which the present invention belongs It is provided to fully inform the holder of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification. The sizes and relative sizes of layers and regions in the drawings may be exaggerated for clarity of explanation.

Terms used in this specification are for describing embodiments, and therefore are not intended to limit the present invention. In this specification, singular forms also include plural forms unless specifically stated otherwise in a phrase. As used herein, "comprise" and/or "comprising" means that a stated component, step, operation, and/or element is the presence of one or more other components, steps, operations, and/or elements. or do not rule out additions.

1 shows a perspective view of a reduced support device for a boring spindle according to an embodiment of the present invention, and FIG. 2 shows a cross-sectional side view of FIG. Figure 3 shows a view of releasing the coupling of the sleeve and the front supporter with a wrench in order to extend the support device of the boring spindle according to the embodiment of the present invention in the state of Figure 1, Figure 4 shows the boring according to the embodiment of the present invention The spindle's support device is shown in an extended perspective view. 5 shows a cross-sectional side view of FIG. 4, and FIG. 6 shows a perspective view of a sleeve according to an embodiment of the present invention.

1 to 6, the boring spindle support device 100 according to the embodiment of the present invention is a device for supporting the boring spindle 20 disposed to be linearly movable forward in the milling spindle 10. And, as shown in FIG. 3, the coupling of the sleeve 120 and the front supporter 130 to be described later may be released using a wrench 30 to vary the length according to the processing situation.

The boring spindle support device 100 according to the present invention may largely include a rear supporter 110, a sleeve 120, and a front supporter 130, and may further include a fixing flange 140.

The rear supporter 110 accommodates the boring spindle 20 and may be fixed to the milling spindle 10, and guarantees a basic support interval of the boring spindle 20.

The rear supporter 110 may include a cylindrical rear body 111 and a rear flange 112 formed at the rear of the rear body 111 and fastened to the milling spindle 10 by bolts.

In addition, a guide slot 111a may be formed in the axial direction in the rear body 111, which limits the moving distance of the front supporter 130 by placing a guide pin 132 of the front supporter 130, which will be described later. can do.

The sleeve 120 may be disposed on an outer circumferential surface of the rear supporter 110 .

When only the sleeve 120 is disposed on the outer circumferential surface of the rear supporter 110, it can be freely moved in the longitudinal direction, but when combined with the front supporter 130 to be described later, it can be fixed on the rear supporter 110. there is.

Specifically, the sleeve 120 includes a cylindrical sleeve body 121 having an inner circumferential surface formed identical to an outer circumferential surface of the rear supporter 110 and an outer circumferential surface tapered to have a smaller outer diameter toward the front, and the sleeve body 121 It may include a sleeve flange 122 formed at the rear of.

That is, since the sleeve body 121 is formed to be tapered and the inner circumferential surface of the front supporter 130 to be described later is formed to correspond thereto, a fixing force may be generated on the rear supporter 110.

For this fixing force, a male screw thread 121a may be formed in the sleeve body 121 adjacent to the sleeve flange 122, which is engaged and fastened with the female screw thread 131 of the front supporter 130 to be described later.

In addition, the sleeve body 121 has a plurality of open slots 121b formed long in the axial direction so that the front of the sleeve body 121 is opened at a predetermined distance from each other, so that the sleeve body 121 opens when fastened with the front supporter 130 to be described later. The interval between the slots 121b is narrowed, and the original interval may be restored when coupling is released.

The narrowing of the gap between the open slots 121b means that the outer circumferential surface of the rear body 111 is pressed, and the return of the gap between the open slots 121b to the original state means that the sleeve 120 on the rear body 111 has a structural meaning that is movable in the axial direction.

In addition, at least two coupling grooves 122a into which a wrench 30 for rotating the sleeve 120 clockwise or counterclockwise may be formed on the bottom surface of the sleeve flange 122 .

After all, this allows the operator to easily vary the length of the boring spindle support device 100 with the dedicated wrench 30 .

Therefore, in the boring spindle support device according to the present invention, a sleeve is disposed between the rear supporter and the front supporter, and the length capable of supporting the boring spindle can be varied depending on whether the sleeve and the front supporter are fastened. It is possible to perform cutting processing by protruding the boring spindle, thereby improving the processing precision, and reducing the manufacturing cost of the support device because it does not require separate production for each length of the boring spindle, and miniaturization and It is possible to achieve compactness of the entire machine tool.

In addition, a threaded hole 122b formed in the direction of the rear supporter 110 may be formed on an outer circumferential surface of the sleeve flange 122, and the sleeve 120 is fastened to the threaded hole 122b to form the sleeve 120 into the rear supporter ( 110) may further include a fixing piece 123 for fixing.

That is, the sleeve 120 is primarily fixed to the rear supporter 110 by threaded coupling between the sleeve 120 and the front supporter 130 to be described later, and is secondarily fixed to the rear supporter 110 by a fixing piece 123. It is possible to implement a solid fixing force, thereby improving the processing precision.

The front supporter 130 accommodates the boring spindle 20 . In addition, the front supporter 130 performs a function of fixing the sleeve 120 in close contact with the outer circumferential surface of the rear supporter 110 when the inner circumferential surface of the sleeve 120 and the screw thread are engaged.

In addition, the front supporter 130 allows the sleeve 120 to move on the outer circumferential surface of the rear supporter 110 when the coupling is released.

That is, even if the boring spindle 20 protrudes long from the milling spindle 10 due to the extension of the front supporter 130, a solid supporting force can be implemented.

Specifically, the front of the inner circumferential surface of the front supporter 130, not facing the sleeve body 121, is formed in a shape corresponding to the outer circumferential surface of the boring spindle 20, and the rear facing the sleeve body 121 is the sleeve body ( 121) may be formed in a shape corresponding to the outer circumferential surface.

A female thread 131 is formed on the inner circumferential surface of the rear side of the front supporter 130 and engages with the male thread 121a formed on the outer circumferential surface of the sleeve body 121.

1 to 5 show a state in which the front supporter 130 and the sleeve 120 are coupled, and in order to change the state, the threaded coupling is released so that the distance between the rear end of the front supporter 130 and the sleeve flange 122 is reduced. It must be isolated.

As described above, the front supporter 130 may further include a guide pin 132 placed in the guide slot 111a to limit the extension distance of the front supporter 130 .

The fixing flange 140 has a ring shape fastened to the front surface of the front supporter 130, and can prevent the inflow of foreign substances such as chips and coolant and support the front end of the boring spindle 20.

Therefore, the boring spindle support device according to the present invention eliminates the need to install a separate support device for each equipment as the length of the support device capable of supporting the spindle is varied, eliminating the time and work process for installing them individually. Thus, it is possible to reduce maintenance costs, prevent resource waste, effectively support boring spindles having various lengths, reduce non-processing time, maximize productivity, and promote operator convenience.

Referring to FIGS. 1 to 6, the operating principle and driving principle of the boring spindle support device 100 according to an embodiment of the present invention will be described.

In order to extend from the state of FIG. 1 to the state of FIG. 4 or to expand and contract in the opposite direction, once the secondary fixing force is released by turning the fixing piece 123, and as shown in FIG. 3, using a wrench 30 or other tools The threaded connection between the sleeve 120 and the front supporter 130 needs to be released.

The release of the screw thread connection means the release of the primary fixing force, which is a state in which the distance between the rear end of the front supporter 130 and the sleeve flange 122 is spaced apart as described above. That is, this state means that the distance between the open slots 121b returns to the original state, and the sleeve 120 can be freely moved on the rear supporter 110.

When the sleeve 120 is moved to a desired position, the boring spindle 20 can be effectively supported by assembling in the reverse order described above.

In the detailed description of the present invention described above, it has been described with reference to preferred embodiments of the present invention, but those skilled in the art or those having ordinary knowledge in the art will find the scope of the present invention described in the claims to be described later. It will be understood that various modifications and changes can be made to the present invention without departing from the spirit and technical scope. Therefore, the technical scope of the present invention is not limited to the contents described in the detailed description of the specification, but should be defined by the claims.

10: milling spindle 20: boring spindle
30: wrench 100: support device for boring spindle
110: rear supporter 111: rear body
111a: guide slot 112: rear flange
120: sleeve 121: sleeve body
121a: male thread 121b: open slot
122: sleeve flange 122a: fastening groove
122b: threaded hole 123: fixing piece
130: front supporter 131: female thread
132: guide pin 140: fixed flange

Claims (10)

A rear supporter that accommodates the boring spindle and is fixed to the milling spindle;
a sleeve disposed on an outer circumferential surface of the rear supporter; and
A front supporter accommodating the boring spindle, allowing the sleeve to be closely attached to and fixed to the outer circumferential surface of the rear supporter when coupled with the inner circumferential surface of the sleeve, and allowing the sleeve to move on the outer circumferential surface of the rear supporter when uncoupled. A support device for a boring spindle, characterized in that for doing.
According to claim 1,
The sleeve,
a cylindrical sleeve body having an inner circumferential surface formed the same as an outer circumferential surface of the rear supporter and having an outer circumferential surface tapered to have a smaller outer diameter toward the front; and
A support device for a boring spindle comprising a; sleeve flange formed at the rear of the sleeve body.
According to claim 2,
Of the inner circumferential surface of the front supporter, the front side that is not opposed to the sleeve body is formed in a shape corresponding to the outer circumferential surface of the boring spindle, and the rear side opposite to the sleeve body is formed in a shape corresponding to the outer circumferential surface of the sleeve body. A support device for a boring spindle.
According to claim 3,
A male thread is formed in the sleeve body adjacent to the sleeve flange,
Support device for a boring spindle, characterized in that a female thread is formed on the inner circumferential surface of the rear of the front supporter.
According to claim 2,
The support device for the boring spindle, characterized in that the sleeve body is formed with a plurality of open slots formed long in the axial direction so that the front of the sleeve body is opened at a predetermined interval from each other.
According to claim 2,
Support device for a boring spindle, characterized in that at least two fastening grooves into which a wrench for rotating the sleeve clockwise or counterclockwise is formed on the bottom surface of the sleeve flange.
According to claim 2,
A threaded hole formed in the direction of the rear supporter is formed on an outer circumferential surface of the sleeve flange,
The support device of the boring spindle, characterized in that the sleeve is fastened to the threaded hole and further comprises a fixing piece for fixing the sleeve to the rear supporter.
According to claim 1,
The rear supporter,
Cylindrical rear body; and
A support device for a boring spindle comprising a; rear flange formed at the rear of the rear body and bolted to the milling spindle.
According to claim 8,
A guide slot is formed in the axial direction in the rear body,
The front supporter supports the boring spindle further comprising a guide pin placed in the guide slot to limit an extension distance of the front supporter.
According to claim 1,
Boring spindle support device further comprising a ring-shaped fixing flange fastened to the front surface of the front supporter.

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