KR101668062B1 - Numerical control machine tool - Google Patents

Numerical control machine tool Download PDF

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Publication number
KR101668062B1
KR101668062B1 KR1020150008776A KR20150008776A KR101668062B1 KR 101668062 B1 KR101668062 B1 KR 101668062B1 KR 1020150008776 A KR1020150008776 A KR 1020150008776A KR 20150008776 A KR20150008776 A KR 20150008776A KR 101668062 B1 KR101668062 B1 KR 101668062B1
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KR
South Korea
Prior art keywords
post member
horizontal
post
block
guide
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Application number
KR1020150008776A
Other languages
Korean (ko)
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KR20160089170A (en
Inventor
민병덕
Original Assignee
민병덕
(주)케이엠씨
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Priority to KR1020150008776A priority Critical patent/KR101668062B1/en
Publication of KR20160089170A publication Critical patent/KR20160089170A/en
Application granted granted Critical
Publication of KR101668062B1 publication Critical patent/KR101668062B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/01—Frames, beds, pillars or like members; Arrangement of ways
    • B23Q1/015—Frames, beds, pillars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/01—Frames, beds, pillars or like members; Arrangement of ways
    • B23Q1/017—Arrangements of ways
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C9/00—Details or accessories so far as specially adapted to milling machines or cutter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • 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
    • B23Q5/22—Feeding members carrying tools or work
    • 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
    • B23Q2701/00—Members which are comprised in the general build-up of a form of the machine
    • B23Q2701/02—Movable or adjustable work or tool supports for milling machines, their drive, control or guiding

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machine Tool Units (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerically controlled machine tool, and more particularly, to a numerically controlled machine tool capable of precision machining by precise position control of a machining member for machining a workpiece. The numerical control machine tool according to the present invention comprises: a post member which is movably mounted on a main body or other constituent elements provided in the main body and supports a processing member for machining the workpiece; A guide member provided in the main body or other structure to guide movement of the post member in one direction and configured so that the three guide rails surround the post member and have a triangular arrangement structure; And drive means mounted on the body or other components for moving the post member.

Description

[0001] NUMERICAL CONTROL MACHINE TOOL [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerically controlled machine tool, and more particularly, to a numerically controlled machine tool capable of precision machining by precise position control of a machining member for machining a workpiece.

A numerically controlled machine tool is a machine tool that is operated by using a numerical control device and is also referred to as an NC machine tool. The numerical control device includes a calculator command mechanism for instructing the machine to operate, a mechanism for detecting whether the machine is moving according to the command, and a mechanism for automatically comparing the detected value with the target value, .

From the machining plan, the shape dimensions of the workpiece, the machining order as the machining conditions, the cutting speed and the type and size of the cutting tool are translated into special numerical symbols. When this symbol is input to the control device, a command is issued to the machine tool, The tool operates automatically according to the command.

It is made to manufacture multiple parts and is applied to cam cutting by milling machine or automatic positioning of hole drilling position in boring machine. At present, numerical control is applied to shelves and so on. With the development of semiconductor technology and computers, an NC machine tool incorporating a computer in an NC machine tool is called a CNC machine tool.

An example of a conventional CNC machine tool is disclosed in Korean Patent Publication No. 1996-0013171 (hereinafter, referred to as Prior Art 1), Korean Patent Publication No. 2009-0032675 (hereinafter referred to as Prior Art 2), Japanese Patent Application Laid- -021271 (hereinafter referred to as Prior Art 3).

According to the CNC lathe of the prior art document 1, since the spindle spindle bundle for machining the workpiece is moved up and down and left and right, the position of the chuck for machining the workpiece is automatically determined. At this time, a pair of guides for moving the spindle spindle bundle in the left and right direction are installed long in the left and right direction, and the two guides are installed up and down. The pair of guides are slidably engaged with the back surface portion of the main spindle bundle.

According to the CNC lathe of the prior art 1 having such a structure, since only the back side of the main spindle bundle is supported by the guide and the front side is not supported, when the main spindle spindle is slid to the left and right, And as a result, it is difficult to precisely control the position of the chuck.

According to the CNC machine tool of the prior art document 2, since the three drive parts are slid up and down, the position of the cutter for machining the workpiece is automatically determined. At this time, a pair of guides for sliding the three drive portions up and down are provided on the front surface of the post member in the vertical direction. The two guides are spaced apart from each other. A pair of guides are slidably engaged with the back surface portion of the sliding member that supports the three driving portions.

According to the CNC machine tool of the prior art 2 having such a structure, as in the prior art document 1, only the back side of the sliding member is supported by the guide and the front side is not supported. Therefore, in the process of sliding the sliding member in the up and down direction, the load is directed to the front side, and the sliding is not smoothly performed. As a result, it is difficult to precisely control the position of the cutter.

According to the machine tool of the prior art document 3, two linear motors as driving means and four rails as guide rails are provided to slide the main shaft portion, and one linear motor and two rails are provided on both sides of the main shaft portion .

According to the machine tool of the prior art 3 having such a structure, since the driving means and the guide rail are symmetrically provided on the left and right sides, even if the operation of the left and right driving means (double drive shaft) is slightly shifted, the sliding of the main shaft portion can not be performed smoothly A control error may occur.

Korean Patent Publication No. 1996-0013171 Korean Patent Publication No. 2009-0032675 Japanese Unexamined Patent Application Publication No. 2006-021271

It is an object of the present invention to provide a numerical control machine tool capable of precisely machining a workpiece through precise position control of a machining member.

The numerical control machine tool according to the present invention comprises: a post member which is movably mounted on a main body or other constituent elements provided in the main body and supports a processing member for machining the workpiece; A guide member provided in the main body or other structure to guide movement of the post member in one direction and configured so that the three guide rails surround the post member and have a triangular arrangement structure; And drive means mounted on the body or other components for moving the post member.

The post member includes: a first post member disposed horizontally and movably on the body or another component; And a second post member disposed movably in a vertical direction on the first post member and supporting the processing member, wherein a triangular arrangement structure of the three guide rails surrounding the post member includes first and second post members Applies to all, or to only one.

The driving means are each provided to slide the first and second post members, respectively, and each driving means is a single driving shaft type which is connected to the first and second post members and has only one driving shaft for transmitting the driving force.

The guide member includes: a horizontal guide member provided for a horizontal guide of the first post member; And a vertical guide member provided for a vertical direction guide of the second post member.

The main body is provided with a first support block and a second support block spaced apart from each other on which a horizontal guide member and a drive means are installed and the first post member is moved horizontally between the first support block and the second support block do.

The horizontal guide member includes: a first horizontal rail horizontally installed horizontally in the first support block; A second horizontal rail disposed parallel to the first horizontal rail below the first horizontal rail in the first support block; A third horizontal rail installed parallel to the first and second horizontal rails on the second support block; And a horizontal guide block provided at the rear portion and the front portion of the first post member and slidably engaged with the horizontal rails, respectively.

The drive shaft of the driving means for sliding the horizontal guide member is disposed between the first and second horizontal rails in the first support block and the drive shaft is located at the center of a line segment connecting the drive centers of the first and second horizontal rails, 3 The driving center of the horizontal rail is positioned on a line perpendicular to the center of the line segment connecting the driving centers of the first and second horizontal rails.

The first post member is provided with a movement space in which the second post member is vertically movably installed. The vertical guide member includes a first vertical rail vertically installed vertically in the longitudinal direction on the front surface of the second post member. Second and third horizontal rails vertically installed vertically in the longitudinal direction so as to face each other on opposite sides of the second post member; And a vertical guide block fixedly installed on the inner side of the moving space and each of the vertical rails slidably engaged with each other.

The first vertical rail is located at the front center of the second post member and the drive shaft of the drive means for sliding the second post member is located at the rear center of the second post member and connects the drive shaft and the drive center of the first vertical rail The line segment is perpendicular to the center of the line connecting the drive centers of the second and third vertical rails.

The numerical control machine tool according to the present invention is characterized in that the first and second support blocks are connected to each other to firmly hold the two support blocks and to minimize the change in the interval that can be generated between the two support blocks due to the temperature change affecting the support blocks A support; And a horizontal guide block, and a block engaging portion provided on the first post member and coupled to the horizontal guide block, so that even if different thermal deformation occurs on the side of the horizontal rail and the first post member due to the temperature change, So that the sliding of the first post member can be smoothly performed.

The spacer includes: a first engaging portion coupled to the horizontal guide block; And a second engaging portion coupled to the block engaging portion, wherein the first and second engaging portions are connected to each other so as to allow relative movement when different thermal displacements occur on the horizontal rail side and the first post member side.

And the processing member is decelerated at a safe position to be lowered at a low speed while the processing member is lowered at a low speed and the second post member is provided with a processing member at a safe position set by the control member, And a length sensor for detecting the length of the machining member is installed in the tool supply portion provided on the main body for supplying the machining member, and a peripheral temperature is detected around the machining member, A temperature sensor is provided to help adjust the fall height of the member.

According to the numerical control machine tool of the present invention, the following effects can be expected.

First, by adopting a three-guide member structure having a triangular arrangement structure in three places surrounding the post member in the guide structure of the X axis and Z axis and guiding the sliding, it is possible to precisely control the position of the processing member by effectively eliminating the error factor in sliding .

Second, since the post member is slid in the X axis or the Z axis through one drive shaft, sliding of the post member can be performed smoothly as compared with a system in which the double drive shaft is applied, and control errors that may occur during operation are minimized can do.

Third, it is possible to suppress the structural thermal deformation due to heat generated in the driving portion of the driving means and the slide portion through the block supporting portion and the spacer, or to compensate for the deviation in the sliding portion in the thermal deformation, thereby maintaining the constant precision.

Fourth, regardless of the ambient temperature change, the machining member is always made to descend at a constant height, and the descending speed is automatically decelerated when the machining member reaches the safe position even if the operator's setting is wrong or incorrect data is input , The machining member, the spindle, and the workpiece can be prevented from being damaged.

1 and 2 are perspective views of a numerically controlled machine tool according to a preferred embodiment of the present invention.
3 is a plan view of a numerically controlled machine tool according to a preferred embodiment of the present invention.
4 is a left side view of a numerically controlled machine tool according to a preferred embodiment of the present invention.
5 is a right side view of a numerically controlled machine tool according to a preferred embodiment of the present invention.
6 is an enlarged perspective view showing a state in which the first post member is installed in the first and second support blocks;
7 is a view showing the relationship between the first post member, the horizontal guide member, and the second driving means;
8 is a view schematically showing the arrangement relationship between the horizontal rail and the second drive shaft;
9 is an enlarged perspective view showing a state in which the second post member is installed in the first post member;
10 is a view showing the relationship between the second post member, the vertical guide member, and the third drive means;
11 is a cross-sectional view showing a state in which a guide block and a post member are connected.
12 is a perspective view showing an example of the spacer shown in Fig.
13 is a plan view showing an example of the spacer shown in Fig.
14 is a plan view showing another embodiment of the spacer shown in Fig.
FIGS. 15 and 16 are views schematically showing a state in which a sensor senses a lowering position of a processing member and decelerates at a specified speed when reaching a safety position. FIG.
17 is a view showing a process in which the processing member is controlled to be lowered at a constant height regardless of the temperature change around the processing member.
18 is a wiring diagram showing a process of supplying power to a position sensor, a tool length sensor or a temperature sensor.
19 is a view showing a structure in which a cover is provided on the outside of the first supporting block and the second supporting block, and the air cooled / heated through the circulating fan is circulated to the inside by the cover.
20 is a view showing a structure in which a circulating fan is installed in a machine body to circulate air in a closed space to a lower portion of the main body.
21 is a view showing a circulating flow state of air in a lower portion of the machine body;

Hereinafter, preferred embodiments of the numerical control machine according to the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 1 and 2 are perspective views of a numerically controlled machine tool according to a preferred embodiment of the present invention, and FIG. 3 is a plan view of a numerically controlled machine tool according to a preferred embodiment of the present invention. FIGS. 1 and 2 show a state in which the direction is viewed in a different direction, and a state in which the cover covering the entire machine tool is removed is shown.

The numerical control machine tool according to the present invention includes a main body 10, a first post member 20 provided for horizontal positional movement (X-axis movement) of the machining member, and a vertical position movement (Z- And a second post member 30 provided for the second post member 30.

The main body 10 includes a base 11 and first and second support blocks 12 and 13 formed on the base 11 at an interval therebetween with an interval therebetween and formed of an X axis of the first post member 20 .

On the upper surface of the base 11, a table 40 on which a workpiece is placed is horizontally moved in the fore-and-aft direction (Y-axis direction), and a table guide member is provided for this purpose. The table guide member includes a pair of table horizontal rails 51 projecting from the upper surface of the base 11 in the forward and rearward directions and spaced apart from each other in parallel left and right, ). On both sides of the table guide member, a downwardly sloping slope 11a is formed in a rearward direction, so that the cleaning liquid containing chips can be easily removed during cleaning.

A first driving means (60) for horizontally moving the table (40) is mounted between the two table horizontal rails (51) constituting the table guide member. The first driving means 60 includes a first driving motor 61 and a first coupling portion (not shown) axially coupled to the first driving motor 61 and provided at the center of the bottom surface of the table 40, And a first drive shaft 62 in the form of a screw. The Y axis movement of the table 40 is precisely controlled through the normal and reverse drive of the first drive motor 61. [

The first support block 12 is installed on the upper surface of the base 11 and supports the rear portion of the first post member 20 so as to be slidable in the X-axis direction. The second support block 13 is installed on the upper surface of the base 11 at a distance in front of the first support block 12 to support the front portion of the first post member 20 in a manner capable of sliding in the X axis direction. The first support block 12 is a main support block for supporting the first post member 20 and has a height higher than that of the second support block 13 and a wide front and rear width. The second support block 13 is relatively less deformed as compared with the second support block 13.

A horizontal guide member for guiding the sliding of the first post member 20 in the X-axis direction is provided on the upper surface and the front surface of the first support block 12 and on the upper surface of the second support block 13, respectively. The horizontal guide member includes a first horizontal rail 71 horizontally extended horizontally on the upper surface of the first support block 12, a second horizontal rail 71 horizontally extended horizontally on the front surface of the first support block 12, A second horizontal rail 72 parallel to the rail and a third horizontal rail 73 horizontally and horizontally disposed on the upper surface of the second support block 13 and parallel to the first and second horizontal rails 71 and 72 And a horizontal guide block 74 slidably engaged with the horizontal rails 71, 72 and 73, respectively.

A second driving means 80 for horizontally moving the first post member 20 is mounted between the first and second horizontal rails 71 and 72 in the front surface of the first support block 12. The second driving means 80 includes a second driving motor 81 and a second engaging portion (not shown) axially coupled to the second driving motor 81 and provided on the outer side of the rear portion of the second post member 30, And a second drive shaft 82 in the form of a screw to which the drive shaft 82 is screwed. The movement of the first post member 20 in the X-axis direction is precisely controlled through the normal and reverse driving of the second drive motor 81. [

The first post member 20 horizontally moves in the X-axis direction between the first and second support blocks 12 and 13 by using a horizontal guide member to thereby hold the X-axis position of the processing member. The first post member 20 is provided with a first block engaging portion 21 which is seated on a horizontal guide block 74 sliding along the first horizontal rail 71, And a second block engaging portion 22 which is seated and engaged with a horizontal guide block 74 sliding along the second horizontal rail 72 is provided on the lower side of the rear surface of the first post member 20, And a third block engaging portion 23 that is seated and engaged with the horizontal guide block 74 sliding along the three horizontal rails 73. On the other hand, the first post member 20 is provided with a movement space 24 in which the second post member 30 is inserted and can move in the vertical direction.

The second post member 30 is installed in the moving space 24 of the first post member 20 so as to be slidable in the vertical direction and a spindle on which the machining member is mounted is mounted on the lower portion to hold the Z- give. The second post member 30 has a rectangular shape with a hole at the center when viewed from above, and is vertically moved in the vertical direction using a vertical guide member provided on the front surface and both side surfaces.

The vertical guide member includes a first vertical rail 91 vertically installed vertically in the vertical direction at the front center of the second post member 30 and a second vertical rail 91 vertically installed on both sides of the second post member 30, 3 vertical rails 92 and 93 and first and second vertical rails 91 and 92 and 93 which are provided on the inner wall of the moving space 24 of the first post member 20, And a vertical guide block 94 for guiding the vertical guide block.

At the rear end of the first post member 20, a third driving means 100 for vertically moving the second post member 30 is mounted. The third drive means 100 includes a third drive motor 101 and a third engagement portion (not shown) axially coupled to the third drive motor 101 and provided at the rear end of the second post member 30, And a third drive shaft 102 to be described later. The Z-axis movement of the second post member 30 is precisely controlled through the normal / reverse drive of the third drive motor 101. [

On the other hand, the unexplained reference numeral 110 denotes a tool supply unit which is rotatably installed on the base 11 in a state in which a plurality of processing members necessary for machining the workpiece are supported and supplies the machining member. When the spindle mounted on the lower portion of the second post member 30 is positioned on the upper side of the tool feeder 110, the tool is automatically supplied to the spindle and mounted on the spindle.

FIG. 4 is a left side view of a numerically controlled machine tool according to a preferred embodiment of the present invention, and FIG. 5 is a right side view of a numerically controlled machine tool according to a preferred embodiment of the present invention.

Heat is generated at the time of operation of the second and third driving means (80, 100) and at the sliding of the first and second post members (20, 30), and structural heat deformation occurs in the machine tool by the heat. In particular, there is a possibility that deformation (sagging) of the first and second support blocks 12 and 13 due to the clearance of the slide portion may occur due to deformation caused by heat generated at the slide portion during long-time operation. If the deformation occurs in the two support blocks 12 and 13, the first and second post members 20 and 30 can not be smoothly slid and the precise position control of the processing member becomes difficult.

In order to solve this problem, both side portions of the first and second support blocks 12 and 13 are firmly connected to the pair of block supporting portions 14. The block supporting portion 14 firmly holds both side portions of the first and second supporting blocks 12 and 13 so that the installation state of the first and second supporting blocks 12 and 13 can be firmly maintained, It is possible to suppress the change in the distance between the two support blocks 12 and 13 due to the above. When the length of the block supporting part 14 itself is changed during the thermal deformation, the block supporting part 14 and the supporting block 12 (13) So that it is equipped with thermal deformation compensation holes 14a for suppressing the change of its own length. The thermal deformation compensation hole 14a deforms only in the thermal deformation compensation hole 14a at the time of thermal deformation of the block supporting portion 14 itself and the change of the length of the block supporting portion 14 can be suppressed.

Fig. 6 is an enlarged perspective view showing a state in which the first post member is installed in the first and second support blocks, Fig. 7 is a view showing the relationship between the first post member, the horizontal guide member, Is a diagram schematically showing the arrangement relationship between the horizontal rail and the second drive shaft.

The first, second and third horizontal rails 71 and 72 for guiding the sliding of the first post member 20 to the first and second support blocks 12 and 13 constituting the main body 10, (73) is elongated in the X-axis direction. The height of the first support block 12 is higher than the height of the second support block 13.

The first horizontal rail 71 is provided on the upper surface of the first support block 12 and its guide surface faces upward. The second horizontal rail 72 is installed on the front surface of the first support block 12 with a distance downward from the first horizontal rail 71 and its guide surface faces forward. The second horizontal rail 72 is formed at a position protruding forward from the first horizontal rail 71. The third horizontal rail 73 is installed on the upper surface of the second support block 13 and its guide surface faces upward.

The block engaging portions 21, 22 and 23 provided at two positions on the rear side of the first post member 20 and one position on the front side are respectively slidable with the respective horizontal rails 71, 72 and 73 And is engaged with the horizontal guide block 74 to be engaged.

The first and second horizontal rails 71 and 72 and the first and second horizontal guide blocks 74 support the rear load of the first post member 20, The third horizontal guide block 74 engaging with the third horizontal guide block 74 supports a load that is directed to the front portion of the first post member 20, thereby smoothly sliding the first post member 20.

The installation position of the second drive shaft 82 is located at the center of the imaginary line segment L1 connecting the drive center portion of the first horizontal rail 71 and the drive center portion of the second horizontal rail 72. [ The position of the third horizontal rail 73 is located between the first and second horizontal rails 71 and 72 so that the center of the line L1 connecting the first and second horizontal rails 71 and 72 As shown in Fig. A virtual line segment L3 connecting the imaginary line segment L2 connecting the drive center portion of the first and third horizontal rails 71 and 73 to the drive center portion of the second and third horizontal rails 72 and 73 Are preferably formed to have the same length. Therefore, the triangle formed by the lines L1, L2, and L3 connecting the driving centers of the horizontal rails 71, 72, and 73 forms an isosceles triangle. This is because the third horizontal rail 73 offsets the unbalance of the force transmitted to the first and second horizontal rails 71 and 72 owing to the moment generated when the second driving shaft 82 rotates, 20 to slide in a stable manner. This makes it possible to precisely control the position of the processing member for machining the workpiece, in particular, on the X axis.

The second driving shaft 82 is axially coupled to the second driving motor 81 and the second driving shaft engaging portion 25 provided at the rear portion of the first post member 20 is screwed to the outside of the second driving shaft 82. Accordingly, when the second drive motor 81 is driven, the first post member 20 is slid in the X-axis direction while the second drive shaft 82 is rotated.

As described above, the first, second and third horizontal rails 71, 72 and 73, which slidably support the first post member 20, have a triangular arrangement structure at three points surrounding the first post member 20, So that the first post member 20 can be stably slid without any unbalance of force and the first post member 20 can be slid by using a single drive shaft, The control error that may occur can be minimized. In addition, a high acceleration / deceleration capability can be realized when the first post member 20 is slid on the X axis.

Fig. 9 is an enlarged perspective view showing a state in which the second post member is provided in the first post member, and Fig. 10 is a view showing the relationship between the second post member, the vertical guide member, and the third drive means.

As described above, the first post member 20 is provided with a movement space 24 through which the second post member 30 is vertically penetrated to be vertically movable.

The second post member 30 is hollow when viewed in plan and has an outer shape of a rectangular shape. A first vertical rail 91 is vertically provided at the center of the outer front surface of the second post member 30 and a second vertical rail 91 is provided at a position offset rearward from both outer sides of the second post member 30, (92) and (93) are vertically arranged. A plurality of vertical guide blocks 94 engaging with the first, second and third vertical rails 91, 92 and 93 are provided in the moving space 24.

The second and third vertical rails 92 and 93 are provided on opposite sides of the second post member 30 so as to face each other. This is to prevent lateral shake due to vertical height change of the second post member 30 caused by the movement of the first post member 20 in the X axis direction.

The first vertical rail (91) is installed at the center of the front portion of the second post member (30). This is to prevent back-and-forth shaking due to a change in the center of gravity of the second post member 30, which occurs when the second post member 30 is vertically slid.

The third driving means 100 is installed at the rear center of the second post member 30. The third drive shaft 102 is located at the rear center of the second post member 30 and the first vertical rail 91 is located at the center of the front portion of the second post member 30, And the third drive shaft 102 are arranged side by side on the second post member 30.

When the first vertical rails 91 are disposed side by side relative to the third driving shaft 102 as described above, the second and third vertical rails 92 and 93 The first vertical rail 91 cancels the unbalance of the force transmitted to the second post member 30, so that the second post member 30 can be stably and smoothly slid. This makes it possible to precisely control the position of the processing member for machining the workpiece, in particular, the Z axis.

According to the Z-axis sliding structure having the above structure (that is, the structure in which the three vertical rails 91, 92 and 93 surrounding the second post member 30 are provided in a triangular arrangement structure) Even if the member 20 is moved in the X axis direction while having a high acceleration, it is not influenced, and the shaking error can be minimized even in the process of machining while the machining member is located at the lowest position. Further, by having a rigid Z-axis transfer structure, a high acceleration / deceleration capability of the second post member 30 can be realized. In addition, by configuring the first post member 20 to slide by using a single drive shaft, a control error that may occur during sliding can be minimized as compared with a case using a double drive shaft.

11 is a cross-sectional view showing a state in which a guide block and a post member are connected to each other, FIG. 12 is a perspective view showing an example of the spacer shown in FIG. 11, FIG. 13 is a plan view showing an example of the spacer shown in FIG. FIG. 14 is a perspective view showing another example of the spacer shown in FIG. 11, and FIG. 15 is a plan view showing another example of the spacer shown in FIG.

Not only the heat generated when sliding the first and second post members 20 and 30 but also the heat generated by the thermal deformation due to the ambient temperature change (for example, a temperature change due to morning / night / evening, The distance between the two support blocks 12 and 13 can be changed. Since there is a difference between the displacement of the first and second support blocks 12 and 13 and the displacement of the first post member 20 during the thermal deformation, a clearance may be generated in the slide portion, ) 30 may not smoothly slide.

In order to solve this problem, even if a clearance of the slide portion occurs due to heat between the horizontal guide block 74 and the block engaging portions 21, 22, 23 of the first post member 20, And a spacer 120 for allowing the post member 20 to slide smoothly.

12 and 13, the spacer 120 includes a first engaging portion 121 coupled to the horizontal guide block 74, and a block engaging portion 21 (22) of the first post member 20, And a second engaging portion 122 coupled to the second engaging portion 23. A separating part 123 separating the two engaging parts 121 and 122 from each other is formed at a predetermined interval between the first engaging part 121 and the second engaging part 122.

When the directions of the forces acting on the first and second coupling parts 121 and 122 are different due to the separating part 123, a relatively elastic movement becomes possible. The thermal deformation of the first and second support blocks 12 and 13 and the thermal deformation of the first post member 20 are different from each other so that the clearance of the first and second engagement portions 121 and 122 The clearance deviation can be compensated for by the relative movement, and the sliding of the first post member 20 can be smoothly performed.

A second coupling portion 122 is formed on both sides of the first coupling portion 121 and a separation portion 123 is formed between the first and second coupling portions 121 and 122. The first and second engaging portions 121 and 122 are connected to each other only at the central portion and the other portions are separated from each other. The first and second coupling portions 121 and 122 of the second coupling portion 122 are formed to be thinner than the other portions of the first and second coupling portions 121 and 122, When the force acts in the other direction, the influence of mutual force can be minimized.

The spacer 120 may be variously modified depending on the surrounding conditions.

An example of another embodiment of the spacer 120 is shown in Fig. 14 (a) to 14 (d), the spacer 120 is formed such that the first engaging portion 121 and the second engaging portion 122 are engaged only in a partial region, A spacer made of a structure that can be easily removed. The thickness and size of some areas can be designed differently depending on the magnitude of the force.

FIGS. 15 and 16 are views schematically showing how the sensor senses the lowered position of the processing member and decelerates at a specified speed when reaching the safe position.

And a spindle on which the processing member (t) is mounted is provided below the second post member (30). As shown in Fig. 15, the machining member t descends at a high speed to increase the machining speed, and becomes closer to the workpiece 1, so that breakage of the machining member t, breakage of the spindle and breakage of the workpiece 1 To be lowered in order to prevent the rotation of the motor.

There is no problem when the worker is properly set, but a problem may arise if the worker's setting is wrong by mistake or the workpiece t is supplied in error. For example, when the machining member t is changed from a position lower than the safety position to a low speed due to a setting error, the point at which the machining member t is converted to the low speed is late, so that breakage of the machining member, the spindle and the workpiece can not be avoided.

In order to prevent such a problem in advance, in the present invention, the height of the work 1 is detected through the position sensor 130 as shown in FIG. 16, and the height of the work 1, The position of the machining member t is automatically set and the machining member t is automatically moved to the work position by detecting the end position of the machining member t reaching the safety position s by the position sensor 130, 1) at a safe speed.

As the position sensor 130 and the length sensor, an ultrasonic sensor or an infrared sensor may be used.

17 is a view showing a process in which the processing member is controlled to be lowered at a constant height regardless of the temperature change around the processing member.

When the temperature around the processing member changes, thermal deformation occurs not only in the processing member but also in the spindle, the post member, and the like, which causes a change in the lowering position of the processing member. If there is a change in the lowering position of the machining member, the machining can not be performed at the correct machining point of the workpiece, and machining of other portions may be performed, resulting in failure.

In order to prevent such a problem in advance, in the present invention, a temperature sensor 140 is provided in various places (for example, a spindle, a post member, etc.) around the processing member to sense a temperature change around the processing member, The position of the processing member is automatically controlled in accordance with the temperature change, so that the processing member is always lowered at a constant height, so that precision machining can be realized and breakage of the processing member, the spindle and the workpiece can be prevented. The relationship between the temperature change and the position of the processing member can be previously dataized and utilized.

18 is a wiring diagram showing a process of supplying power to a position sensor, a tool length sensor or a temperature sensor.

According to the present invention, two power 160 (161) are provided, and a relay 180 is provided between the sensor and the I / O module 170. Through this structure, the power supplied from the first power 160 is supplied to the I / O module 170 via the sensor and the relay 180 in a normal situation. If an overcurrent or a short circuit occurs due to an abnormal operation in the sensor, the relay 180 disconnects the power supplied from the first power 160 and supplies power from the second power 161 to the I / The I / O module 170, which is an expensive component, can be prevented from being damaged.

19 is a view showing a structure in which a cover is provided on the outside of the first support block and the second support block and the air cooled / heated through the circulation fan is circulated inside the cover by the cover.

19, in the numerical control machine tool of the present invention, a cover 15 is provided outside the first support block 12 and the second support block 13, and a cooling / heating device (Not shown), and the air cooled or heated through the circulating fans 191, 192, 193, and 194 can be circulated inside the cover 15 by the cover 15. The cooling / heating device automatically turns on / off the operation of the cooling / heating device according to the temperature of a temperature sensor (not shown) provided on the first post member 20 to maintain the temperature of the first post member 20 constant Thereby minimizing the temperature displacement caused by the ambient temperature change.

FIG. 20 is a view showing a structure in which a circulating fan is installed in a machine body to circulate air in a closed space to a lower portion of the body, and FIG. 21 is a view showing a circulating flow state of air in a lower portion of the machine body.

20 and 21, circulating fans 195, 196, 197 and 198 are installed in the machine body 10 so that the air in the closed space controlled by the temperature of the first post member 20 is supplied to the lower portion of the main body 10 Circulation (the flow of air is indicated by an arrow) through which the temperature of the first post member 20 and the main body 10 can be maintained constant.

As described above, the numerical control machine tool according to the present invention has been described on the basis of the preferred embodiments. However, the present invention is not limited to the specific embodiments, and a person skilled in the art can freely change .

10: main body 11: base
12: first support block 13: second support block
15: cover 20: first post member
21: first block connecting portion 22: second block connecting portion
23: third block connecting portion 24: moving space
25: second drive shaft engaging portion 30: second post member
40: Table 51: Table horizontal rail
60: first driving means 61: first driving motor
62: first drive shaft 71: first horizontal rail
72: second horizontal rail 73: third horizontal rail
74: horizontal guide block 80: second driving means
81: second drive motor 82: second drive shaft
91: first vertical rail 92: second vertical rail
93: third vertical rail 94: vertical guide block
100: third drive means 101: third drive motor
102: third drive shaft 110: tool feed section
120: spacer 121: first coupling portion
122: second engaging part 123: separating part
130: Position sensor 140: Temperature sensor
150: control unit 160,161: power
170: I / O module 180: Relay
191,192,193,194,195,196,197,198: Circulation fan

Claims (15)

A post member movably installed in the main body or other constituent elements provided in the main body and supporting the processing member for machining the workpiece;
A guide member provided in the main body or other structure to guide the movement of the post member in one direction and having three guide rails surrounding the post member and having a triangular arrangement structure; And
And drive means mounted on the body or other components for moving the post member,
The post member includes:
A first post member installed horizontally and movably on the body or other components; And
And a second post member installed movably in a vertical direction to the first post member and supporting the processing member,
The guide member
A horizontal guide member provided for a horizontal guide of the first post member; And
And a vertical guide member provided for a vertical guide of the second post member,
Wherein the first support member and the second support block are spaced apart from each other with a gap between the first support block and the second support block, Is moved in the horizontal direction,
The horizontal guide member
A first horizontal rail installed horizontally and horizontally horizontally in the first support block;
A second horizontal rail installed parallel to the first horizontal rail below the first horizontal rail in the first support block;
A third horizontal rail installed parallel to the first and second horizontal rails on the second support block; And
And a horizontal guide block provided respectively at a rear portion and a front portion of the first post member and slidably engaged with the horizontal rails,
Wherein the numerically controlled machine tool comprises:
A block support unit for connecting the first and second support blocks to firmly hold the two support blocks and minimizing a change in interval that may occur between the two support blocks due to temperature changes affecting the support blocks; And
And the block joining portion provided on the first post member and coupled to the horizontal guide block, so that even if different thermal deformation occurs on the side of the horizontal rail and the first post member due to the temperature change, And a spacer that compensates for the deviation to smoothly slide the first post member. delete The method according to claim 1,
The driving means is respectively provided to slide the first and second post members. Each of the driving means is a single driving shaft type which is connected to the first and second post members and has only one driving shaft for transmitting the driving force. Numerically controlled machine tools. delete delete delete The method according to claim 1,
Wherein the drive shaft of the driving means for sliding the horizontal guide member is disposed between the first and second horizontal rails in the first support block and the drive shaft is located at the center of a line segment connecting the drive centers of the first and second horizontal rails, And the driving center of the third horizontal rail is positioned on a line perpendicular to the center of the line segment connecting the driving centers of the first and second horizontal rails. The method according to claim 1,
Wherein the first post member is provided with a movement space in which the second post member is vertically movably installed,
The vertical guide member
A first vertical rail vertically installed vertically in a longitudinal direction on the front surface of the second post member;
Second and third vertical rails vertically and vertically installed opposite to each other on opposite sides of the second post member; And
And a vertical guide block fixedly installed on the inner side of the moving space and slidably engaged with the vertical rails, respectively. 9. The method of claim 8,
Wherein the first vertical rail is located at the front center of the second post member and the drive shaft of the driving means for sliding the second post member is positioned at the center of the rear surface of the second post member, And a line segment connecting the driving center is perpendicular to a center of a line segment connecting the driving centers of the second and third vertical rails. delete The method according to claim 1,
The spacer
A first coupling unit coupled to the horizontal guide block; And
And a second coupling portion coupled to the block coupling portion,
Wherein the first and second coupling portions are connected to each other so that relative movement is possible when different thermal deformation occurs between the horizontal rail side and the first post member side. The method according to claim 1,
The control member detects the height of the workpiece and automatically adjusts the safety position of the workpiece to the second post member so that the safety member can be moved to the safe position And a length sensor for detecting the length of the processing member is installed in the tool supply portion provided on the main body for supplying the processing member, and the peripheral temperature is detected around the processing member, Wherein a temperature sensor is provided to assist in adjusting the descent height of the processing member. The method according to claim 1,
A cover is provided on the outside of the first support block and the second support block and a cooling / heating device is installed in the space sealed by the cover, and the cover is cooled or heated by the cooling / heating device And a plurality of circulation fans for circulating the air to the inside of the closed space by the cover. 14. The method of claim 13,
The cooling / heating device may be operated by turning on / off the temperature according to the temperature of the temperature sensor provided on the first post member to keep the temperature of the first post member constant, thereby minimizing the temperature displacement caused by the ambient temperature change A numerically controlled machine tool characterized by. 15. The method of claim 14,
Wherein a plurality of circulation fans are installed in the main body and air in the closed space controlled by the temperature of the first post member is circulated through the circulation fan to a lower portion of the main body to adjust a temperature of the main body and the first post member Wherein the machine tool is kept constant.
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