KR20090111489A - 2-Spindle Type Vertical Machining Center - Google Patents

Abstract

PURPOSE: A two-spindle type vertical machining center is provided to reduce the work time in continuous processing by employing a pair of spindles controlled at the same time or separately. CONSTITUTION: A two-spindle type vertical machining center comprises a bed part(10) with a table on which a work piece is placed, a pair of Z-axis moving units moving the table in a Z-axis direction, column units(30) which are fixed to both upper ends of the bed part, a pair of X-axis moving units(40) which are supported on the column units and move together or separately in an X-axis direction, a pair of Y-axis moving units(50) which are formed on the upper side of the bed part and move together or separately in a Y-axis direction, a pair of tool exchange units(60) which is installed behind the Y-axis moving units and exchange tools of spindles(SP1,SP2) at the same time or separately, and a control unit controlling the operation of the Z-, X-, and Y-axis moving units, the spindles and the tool exchange units.

Description

2-Spindle Type Vertical Machining Center}

The present invention relates to a vertical machining center, which is a kind of machine tool, and more particularly, to a vertical machining center to which a pair of spindles capable of simultaneous or independent control is applied.

In general, a machine tool having an automatic tool changer (ATC) for automatically exchanging a tool to a numerically controlled machine tool NC is called a machining center.

Such machining centers automatically process workpieces requiring various operations such as milling, boring, or cutting, and are classified as horizontal machining centers or vertical machining centers according to the position of the spindle, and are disposed in the X, Y, and Z directions. It is designed as a structure including three axes.

In other words, the vertical machining center is capable of rotating a plurality of tools for rotation by means of rotary drive means, and selecting them from the tool magazine, removing the tools mounted on the spindle, and replacing these tools. It has an automatic tool changer that can be used. Therefore, if all the tools needed for machining are equipped in the tool magazine, various operations can be performed in one machining center.

However, the conventional vertical machining center has only one spindle, and thus, there is a structural disadvantage in that productivity is deteriorated while a lot of working time is required during continuous machining of a workpiece.

Accordingly, the present invention has been made to solve the conventional problems as described above, the vertical machining having a double spindle structure consisting of a pair of spindles in which the feed rate and position control is controlled simultaneously or independently in the vertical machining center The purpose is to provide a center.

Vertical machining center having a double spindle structure of the present invention for achieving the above object; A bed part having a table on which a work piece is placed; A Z-axis feeding unit for feeding the table in the Z-axis direction (forward and backward); A column part fixed to both upper ends of the bed part; A pair of X-axis conveying units supported by the column portion and conveyed simultaneously or independently in the X-axis direction (left and right); A pair of Y-axis feeds are respectively coupled to the front of the pair of X-axis feed units through a guide device, and are simultaneously or independently fed in the Y-axis direction (up and down), and each of which is equipped with a spindle equipped with a machining tool. unit; A pair of tool automatic exchange units installed at the rear of the pair of Y-axis transfer units and automatically or independently replace the machining tool at the pair of spindles; It includes, the Z-axis transfer unit and the X-axis transfer unit and Y-axis transfer unit, and the spindle and the tool automatic replacement unit is configured to control the drive by the control unit.

In addition, the filler is configured in the bed portion to prevent shaking due to the load generated during the processing of the workpiece.

In addition, the Z-axis transfer unit includes a Z-axis slider coupled to the table, the Z-axis slider is a Z-axis motor for driving forward / reverse rotation, and the first ball screw to rotate in accordance with the drive of the Z-axis motor By the Z-axis direction (forward and backward).

In addition, reinforcing ribs are formed in the column part to maintain the degree of processing due to heat deformation.

In addition, the X-axis transfer unit includes a pair of X-axis sliders which are supported at both ends of the column portion, respectively, the pair of X-axis sliders each of the pair of X-axis motor for driving forward / reverse rotation; A pair of second ball screws that rotate in accordance with the drive of the X-axis motor is configured to be carried out simultaneously or independently in the X-axis direction (left and right).

In addition, the Y-axis transfer unit is fixed to the X-axis transfer unit and comprises a pair of Y-axis sliders are coupled to each of the pair of spindles, the pair of Y-axis sliders respectively drive forward / reverse rotation A pair of Y-axis motors and a pair of third ball screws that rotate in accordance with the driving of the Y-axis motors are configured to perform simultaneous or independent transfer in the Y-axis direction (up and down).

In addition, the pair of spindles are each directly connected to the motor, characterized in that the acceleration and deceleration and the load amount according to the driving of the direct motor is sensed by the sensor.

As described above, the present invention constitutes a pair of spindles in which the feed speed and the position control are simultaneously or independently controlled in the vertical machining center, thereby increasing productivity by shortening the working time during continuous machining of the workpiece. The effect of improving the inefficiency caused by the excessive input of manpower is obtained.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a front view showing a structure of a vertical machining center having a double spindle structure in an embodiment of the present invention, Figure 2 is a side view showing a structure of a vertical machining center having a double spindle structure in an embodiment of the present invention, 3 is a block diagram showing an operation flow of a vertical machining center having a double spindle structure according to an embodiment of the present invention.

Figure 4 is a front schematic view showing the X-axis / Y-axis feed state of the vertical machining center having a double spindle structure in an embodiment of the present invention, Figure 5 is a state in which the table in the Z-axis direction in the embodiment of the present invention It shows a side schematic view.

The X-axis direction, the Y-axis direction, and the Z-axis direction described below will be described as indicating left, right, up, and down directions, respectively.

1 to 5, the vertical machining center having a double spindle structure according to an embodiment of the present invention is a bed portion 10, Z-axis transfer unit 20, column portion 30, X-axis transfer unit 40, the Y-axis feed unit 50, the spindle (SP1) (SP2), the tool automatic change unit 60, and the control unit 70.

The bed portion 10 is a workpiece 11 is raised, the Z-axis transfer unit 20 is configured in the direction of the Z-axis, that is, a table 11 that can be moved forward and backward, which minimizes the bending caused by thermal deformation to maintain accuracy It is made of castings to make it possible.

Here, the inside of the bed 10 is filled with a filler (not shown) such as mortar so as to correct the mechanical static and dynamic accuracy and to prevent shaking due to the workpiece cutting load during processing.

The Z-axis transfer unit 20 is for transferring the table 11 in the Z-axis direction, the Z-axis slider 21 for transferring the table 11 in the Z-axis direction, and the Z-axis slider ( A Z-axis motor 22 capable of numerical control (NC) to feed 21 and a first ball screw 23 are included.

That is, the Z-axis motor 22 is a servo motor capable of numerical control by the control unit 70, and the first ball screw 23 when the forward or reverse rotation driving of the Z-axis motor 22 is performed. While the direction of rotation is determined, the Z-axis slider 21 coupled to the table 11 is moved in the Z-axis direction, that is, forward and backward, wherein the Z-axis slider 21 is a two-line LM that is a guideway. Follow the guide will be carried out as described above.

The column part 30 is a cast-opening structure of the front opening and closing fixed to the upper both ends of the bed portion 10, the reinforcement ribs 31 are formed inside to maintain the degree of processing due to thermal deformation, the X It is configured to support both ends of the X-axis transfer unit 40 in order to correct the degree of deflection caused by the amount of movement of the shaft transfer unit 40.

The X-axis transport unit 40 is a pair of symmetrical structures supported by the column unit 30 and simultaneously or independently transported in the X-axis direction under the control of the control unit 70, and the X-axis slider ( 41, 42, X-axis motors 43, 44, and second ball screws 45, 46.

The X-axis motors 43 and 44 are servomotors capable of numerical control with a pair of structures, and are configured to be driven in forward / reverse rotation simultaneously or independently under the control of the control unit 70.

The second ball screws 45 and 46 are configured as a pair of structures such that the rotation direction is determined according to simultaneous or individual driving of the X-axis motors 43 and 44.

The X-axis sliders 41 and 42 are supported by the column part 30 as a casting material as a pair of structures, respectively, and according to the rotational direction of the second ball screws 45 and 46. Left and right) simultaneously or separately.

That is, the X-axis sliders 41 and 42 are configured to be conveyed to the left and the right, respectively, or to the left (or the right) in a direction away from each other or in a direction facing each other.

The Y-axis transfer unit 50 is a symmetrical structure that is respectively coupled to the front of the pair of X-axis transfer unit 40 through a guide device, and simultaneously or independently transfer in the Y-axis direction, Y-axis slider ( 51, 52, Y-axis motors 53, 54, and third ball screws 55, 56.

The Y-axis motors 53 and 54 are servomotors capable of numerical control as a pair, and are configured to be driven forward / backward simultaneously under the control of the control unit 70 simultaneously or independently.

The third ball screws 55 and 56 are configured in a pair so that the rotation direction is determined according to simultaneous or individual driving of the Y-axis motors 53 and 54.

The Y-axis sliders 51 and 52 are guide devices supported by the X-axis saddles 41 and 42 in pairs, respectively, in the Y-axis direction according to the rotation of the third ball screws 55 and 56. It is configured to be transported simultaneously or separately (up and down).

That is, the Y-axis sliders 51 and 52 are transferred to the left and right in the direction of the X axis by the X-axis sliders 45 and 46, but are independently transferred or the same to each other in the vertical direction in the Y axis. It is configured to.

The spindles SP1 and SP2 are symmetrical structures respectively mounted on the pair of Y-axis transfer units 50, and a machining tool is fixed, and the Y-axis slider 51 capable of Y-axis transfer as a pair. 52) are fixed to each installation.

At this time, the pair of spindles SP1 and SP2 are directly connected to the motors 63 and 64 as servomotors capable of numerical control, respectively, and simultaneously or independently driven under the control of the control unit 70 for processing. The cutting of the plurality of workpieces by the tool is performed simultaneously or individually.

In addition, the acceleration and deceleration according to the driving of the motors 63 and 64 and the damage of the machining tool according to the load are sensed by a pair of sensors 65, and the sensors 65 each constitute a pair of spindles. (SP1) and SP2.

The tool automatic change unit 60 is a pair of symmetrical structures, and is used to automatically change the machining tool to the pair of spindles SP1 and SP2 simultaneously or independently, and control the control unit 70. Is configured to receive, the installation is made in the rear of the paired Y-axis transfer unit 50.

The control unit 70 may include motors directly connected to the spindles SP1 and SP2, as well as motors included in the Z-axis transfer unit 20, the X-axis transfer unit 40, and the Y-axis transfer unit 50. The programs for numerically controlling each independently or simultaneously are mounted, as well as configured to control the operation of automatic tool change of the tool automatic change unit 60.

That is, while the numerical control program is set by the operator, the control unit 70 is to numerically control the motors independently or simultaneously.

Here, the control unit 70 controls the tool automatic change unit 60 when the tool replacement of the tool for processing is made, the time of the tool change is the X-axis transfer unit 40 and the Y-axis transfer unit 50 And it is equipped with a program to enable at any point even if the Z-axis transfer unit 20 does not return to the origin.

Referring to Figures 1 to 5 attached to the operation of the vertical machining center according to an embodiment of the present invention configured as described above are as follows.

First, when the Z-axis motor 22 of the Z-axis transfer unit 20 formed on the bed portion 10 and guided by the LM guide is driven forward or reverse rotation under the control of the control unit 70, As the driving force of the first ball screw 23 is transmitted, the rotation direction of the first ball screw 23 is determined, and accordingly, the Z-axis slider 21 to which the table 11 is coupled moves forward with respect to the Z-axis direction. Or reversal transfer.

Next, the pair of X-axis motors 43 and 44 included in the X-axis transfer unit 40 fixed at both ends of the column part 30 are controlled to be forward or reverse rotation by the control unit 70. When driving at the same time or independently of each other, the driving force is transmitted to the pair of second ball screws 45 and 46, respectively, so that the second ball screws 45 and 46 are The direction of rotation is determined.

Then, the pair of X-axis sliders 41 and 42 respectively corresponding to the second ball screws 45 and 46 are simultaneously moved to the left (or right) with respect to the X-axis direction, or any one X When the axis slider 41 moves to the left (or right), another X-axis slider 42 moves to the right (or left), respectively, or one of the pair of X-axis sliders 41 and 42. In the stopped state, only one slider moves to the left or the right.

At this time, the pair of X-axis sliders 41 and 42 are provided with a pair of Y-axis sliders 51 and 52 included in the Y-axis feed unit 50, respectively, and the Y-axis sliders 51 (52) is also X-axis feed, and a pair of spindle (SP1) (SP2) fixed to the Y-axis slider (51) 52, respectively, is also possible to feed in the X-axis direction .

On the other hand, the pair of Y-axis sliders 51 and 52 mounted with the pair of spindles SP1 and SP2 are a pair of Y-axis motors 53 and 54 which are controlled by the control unit 70. Is driven at the same time in the forward or reverse rotation, or in different rotation directions through separate control, the driving force is transmitted to each of the pair of third ball screws (55, 56), The rotation direction of the third ball screws 55 and 56 is determined.

Then, the pair of Y-axis sliders 51 and 52 respectively corresponding to the third ball screws 55 and 56 are simultaneously moved downwardly (or upwardly) in the Y-axis direction, or one Y When the axis slider 51 is moved down (or raised), another Y axis slider 52 is moved up or down respectively, or a pair of Y axis sliders 51 and 52 are transferred. At any one of the stops), only one slider is moved in the downward or upward direction.

That is, the table 11 can be moved back and forth in the Y-axis direction by the Z-axis transfer unit 20, the pair of spindle (SP1) (SP2) is a pair of structures X-axis transfer unit 40 By being made simultaneously or independently in the left and right directions in the X-axis direction, respectively, as well as a combination made in the vertical direction in the Y-axis direction by the pair of structures Y-axis transfer unit 50, respectively Three-dimensional transfer is possible.

Accordingly, the plurality of workpieces to be placed on the table 11 can be made respectively from the machining tool mounted on the spindles SP1 and SP2 constituting the pair of structures in the same or independent state. will be.

That is, when a plurality of workpieces of the same shape required for the same cutting work are placed on the table 11, the pair of spindles SP1 and SP2 are simultaneously moved in the X-axis and Y-axis directions. In a state in which the spools are aligned, when a pair of motors 63 and 64 directly connected to the spindles SP1 and SP2 are simultaneously driven, the machining tool mounted on the spindles SP1 and SP2 is divided into a plurality of tools. It is possible to simultaneously perform cutting on the workpiece.

On the other hand, in the case where a plurality of different workpieces required for different cutting operations are placed on the table 11, the spindles SP1 and SP2 are independently moved in the X-axis and Y-axis directions. In the aligned state, when the motors 63 and 64 each connected directly to the pair of spindles SP1 and SP2 are driven independently, the machining tools mounted on the spindles SP1 and SP2 are respectively In the independent control mode, each of the corresponding workpieces is cut.

In this case, when a separate cutting process for a plurality of workpieces is made as described above, different spindles must be mounted on the spindles SP1 and SP2, respectively, which is a pair of pieces controlled by the control unit 70. It is possible by the tool automatic change unit 60.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

1 is a front view showing the structure of a vertical machining center having a double spindle structure in an embodiment of the present invention.

Figure 2 is a side view showing the structure of a vertical machining center having a double spindle structure in an embodiment of the present invention.

Figure 3 is a block diagram showing the operation flow of the vertical machining center having a double spindle structure in an embodiment of the present invention.

Figure 4 is a front schematic view showing the X-axis / Y-axis feed state of the vertical machining center having a double spindle structure in an embodiment of the present invention.

Figure 5 is a side schematic view showing a state in which the table is moved in the Z-axis direction in the embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10; Bed section 11; table

20; Z axis feed unit 21; Z-axis slider

22; Z axis motor 23; 1st ball screw

30; Column part 31; Reinforcement rib

40; X-axis transfer unit 41, 42; X-axis slider

43,44; X-axis motor 45,46; 2nd ball screw

50; Y-axis transfer unit 51, 52; Y-axis slider

53,54; Y-axis motor 55,56; 3rd ball screw

60; Tool automatic change unit 63,64; motor

65; Sensor 70; Control unit

SP1, SP2; Spindle

Claims (7)

A bed part having a table on which a work piece is placed; A Z-axis feeding unit for feeding the table in the Z-axis direction (forward and backward); A column part fixed to both upper ends of the bed part; A pair of X-axis conveying units supported by the column portion and conveyed simultaneously or independently in the X-axis direction (left and right); A pair of Y-axis feeds are respectively coupled to the front of the pair of X-axis feed units through a guide device, and are simultaneously or independently fed in the Y-axis direction (up and down), and each of which is equipped with a spindle equipped with a machining tool. unit; A pair of tool automatic exchange units installed at the rear of the pair of Y-axis transfer units and automatically or independently replace the machining tool on the pair of spindles; Including, And the Z-axis feed unit, the X-axis feed unit and the Y-axis feed unit, and the spindle and tool auto change unit are configured to control their driving by a control unit. The vertical machining center of claim 1, wherein a filler is formed in the bed to prevent shaking due to a load generated during processing of the workpiece. According to claim 1, wherein the Z-axis transfer unit, Z-axis slider coupled to the table, the Z-axis slider is Z-axis direction (forward and backward) by the Z-axis motor for driving forward / reverse rotation, and the first ball screw to rotate in accordance with the drive of the Z-axis motor Vertical machining center having a double spindle structure, characterized in that configured to be transferred to. The vertical machining center of claim 1, wherein a reinforcing rib is formed in the column part to maintain processing accuracy due to thermal deformation. According to claim 1, wherein the X-axis transfer unit, And a pair of X-axis sliders each of which is supported at both ends of the column portion, wherein the pair of X-axis sliders are driven by a pair of X-axis motors for forward / reverse rotation driving and the X-axis motors, respectively. A vertical machining center having a double spindle structure, characterized in that configured to be carried out simultaneously or independently in the X-axis direction (left and right) by a pair of rotating second ball screws. According to claim 1, wherein the Y-axis transfer unit, And a pair of Y-axis sliders supported by the pair of X-axis sliders, respectively, to which a pair of spindles are coupled, wherein the pair of Y-axis sliders each drive a pair of Y-axis drives for forward / backward rotation. Vertical with a dual spindle structure characterized in that the feed is performed simultaneously or independently in the Y-axis direction (up and down) by the motor and a pair of third ball screws that rotate according to the drive of the Y-axis motor. Type machining center. The vertical machining center of claim 1, wherein a motor is directly connected to the pair of spindles, and an acceleration and deceleration amount and a load amount according to driving of the directly connected motor are sensed by a sensor. .

Images