KR200270564Y1 - CNC milling machine for vertical type - Google Patents

Abstract

The present invention relates to a vertical CNC milling machine, comprising: a frame having a base; A knee member installed to reciprocate in the Z-axis direction along a column installed upright with respect to the base; A work piece to be processed is set, and a table member installed on the needle member to reciprocate in the X-axis direction with respect to the upper surface of the needle member; A tool (tool) for processing the workpiece is provided, is installed perpendicular to the table member, the spindle head assembly installed in the frame to be reciprocated in the Y-axis direction crossing the sliding direction of the table member ( spindle head assembly); An X-axis transfer unit provided between the table member and the needle member for reciprocating the table member in the X-axis direction; A Y-axis feed unit installed between the spindle head assembly and the frame to reciprocate the spindle head assembly in the Y-axis direction; And a Z-axis transfer unit provided between the needle member and the base to reciprocate the needle member in the Z-axis direction.

Description

CNC milling machine for vertical type

The present invention relates to a vertical CNC milling machine, more specifically to eliminate the saddle for moving the table in the Y-axis direction, and to transfer the spindle head assembly in the Y-axis direction It relates to a vertical CNC milling machine employing a ram structure that can be made.

In general, CNC milling machines are mainly used for milling cutting, machine tools that can efficiently perform cutting operations such as plane cutting, curved cutting, various groove cutting as well as screws, gears, cams, etc., vertical and horizontal The milling work and the work of the plane, side and slope of the work can be performed in parallel, and the workpiece is processed by adjusting the feed of a table having a driving range up, down, front, back, left, and right. It can easily adjust the processing speed of grinding, drilling, etc., and has a structure to improve the precise processing and processing efficiency by arbitrarily adjusting the temporary work or continuous work.

Such types of CNC milling machines are largely classified into a knee type and a bed type according to their structure, and are classified into a horizontal type and a vertical type according to the installation position of the spindle head.

Among them, the most commonly used CNC milling machine is a needle-type vertical milling machine, which mainly includes columns, knees and saddles, and a niga supporting saddles and tables. It is reciprocated up and down along the column, and the birds are transported in the front and rear directions on the top surface of the teeth and the table is transported from side to side on the saddle.

However, in the conventional vertical CNC milling machine, the saddle and the table-supported needle are installed to be elevated along the column by the lead screw, so that the total load of the table, the saddle and the needle is weighted on the lead screw. Abrasion occurs, and as a result, processing accuracy of the workpiece is lowered, and there is a problem that frequent failure occurs. In addition, when the saddle and the table is transported forward, the load of the saddle and the table is forwarded there is a problem that the machining accuracy is lowered as the drive range of the overall milling machine is variable.

The present invention has been conceived to improve the above problems, it is applied to the knee by adopting a ram structure that can move the spindle head assembly in the Y-axis direction and exclude the birds for transferring the table in the Y-axis direction. By limiting the load to the table, the load of the table, the needle and the spindle head assembly in the X, Y, and Z axis directions can be prevented from being concentrated to one side, thereby preventing frequent failure of the milling machine and improving machining accuracy. The object is to provide a vertical CNC milling machine with a structure that can

1 is a perspective view schematically showing the configuration of a vertical CNC milling machine according to a preferred embodiment of the present invention.

2 is a front configuration diagram of FIG. 1.

3 is a side configuration diagram of FIG. 1.

4 is a cross-sectional view showing the structure of the spindle head assembly shown in FIG.

5 is a longitudinal cross-sectional view showing the structure of the X-axis transfer unit for transferring the table member shown in Figure 1 in the X-axis direction.

6 is a cross-sectional view of FIG. 5.

FIG. 7 is a longitudinal sectional view showing the structure of a Y-axis feed unit for transferring the spindle head assembly shown in FIG. 1 in the Y-axis direction. FIG.

8 is a cross-sectional view of FIG. 7.

9 is a longitudinal cross-sectional view showing the structure of the Z-axis transfer unit for transferring the table member shown in Figure 1 in the Z-axis direction.

10 is a cross-sectional view of FIG. 9.

<Explanation of symbols for the main parts of the drawings>

110 ... control member 120 ... manual handle

130 ... frame 140 ... knee member

150 ... table member

160 ... spindle head assembly

210 ... X-axis feed unit 213 .. X servo motor

214 ... X ball screw shaft 215 ... X ball screw nut

220 ... Y-axis feed unit 221 ... Y guide rail

222 ... RAM Base 223 ... Y Guide Section

224 Ram Body 225 Y Servo Motor

226 ... Y ball screw shaft 227 ... Y ball screw nut

230 ... Z-axis feed unit 231 ... Z guide rail

232 ... Z guide part 233 ... Z servo motor

234 ... Z ball screw shaft 236 ... Z ball screw nut

T ... tool

The present invention for achieving the above object, the frame having a base; A knee member installed to reciprocate in the Z-axis direction along a column installed upright with respect to the base; A work piece to be processed is set, and a table member installed on the needle member to reciprocate in the X-axis direction with respect to the upper surface of the needle member; A tool (tool) for processing the workpiece is provided, is installed perpendicular to the table member, the spindle head assembly installed in the frame to be reciprocated in the Y-axis direction crossing the sliding direction of the table member ( spindle head assembly); An X-axis transfer unit provided between the table member and the needle member for reciprocating the table member in the X-axis direction; A Y-axis feed unit installed between the spindle head assembly and the frame to reciprocate the spindle head assembly in the Y-axis direction; And a Z-axis transfer unit provided between the needle member and the base to reciprocate the needle member in the Z-axis direction.

In the vertical CNC milling machine according to the present invention, the X-axis feed unit: X guide rail formed on the upper surface of the needle member so as to reciprocally slide the table member in the left and right directions with respect to the upper surface of the needle member ; An X guide part formed along a length direction on a bottom surface of the table member to be slidably coupled to the X guide rail; An X-ball screw shaft rotatable at a predetermined rotational speed by an X-servo motor and installed in the knee member along a length direction of the table member; And an X ball screw nut installed on the bottom surface of the table member so as to slide the table member in the X axis direction by converting the rotational movement of the X ball screw shaft into a linear motion. .

In the vertical CNC milling machine according to the present invention, the Y-axis feed unit: is installed in the frame in a direction crossing the feed direction of the table member, the spindle head assembly to the front and rear direction with respect to the table member A ram base with a Y guide rail to be transported to the base; A ram main body having the main head assembly installed therein and having a Y guide part to be slidably coupled to the Y guide rail of the ram base; A Y ball screw shaft rotatable at a predetermined rotational speed by a Y servo motor and installed in the ram body along a length direction of the ram base; And a Y ball screw nut installed on the upper surface of the ram base so as to convert the rotational motion of the Y ball screw shaft into a linear motion so as to slide the ram main body in the Y axis direction. .

In the vertical CNC milling machine according to the present invention, the Z-axis transfer unit includes: a Z guide rail provided in the column to transfer the needle member in the up and down direction with respect to the column; A Z guide part provided on the needle member corresponding to the column to be slidably coupled to the Z guide rail; A Z ball screw shaft rotatable at a predetermined rotational speed by a Z servo motor and installed on the knee member to be inserted into a stand provided upright on the base; And a screw ball coupled to the Z ball screw shaft to be installed at an end side of the stand into which the Z ball screw shaft is inserted to convert the rotational movement of the Z ball screw shaft into a linear motion so as to slide the needle member in the Z axis direction. Z ball screw nut.

In the vertical CNC milling machine according to the present invention, the Z-axis feed unit: is installed on the rotating shaft of the Z servo motor to transmit the rotational force of the Z servo motor to the Z ball screw shaft, the Z ball screw It is further provided with a spiral gear meshed with the shaft.

In the vertical CNC milling machine according to the present invention, the table member is slid in the X-axis direction, the sliding contact portion of the needle member is slid in the Z-axis direction with respect to the column, and the ram body is slid in the Y-axis direction It is further provided with a lubricant oil supply unit installed in the frame to supply lubricant to the sliding contact portion of the base.

In the vertical CNC milling machine according to the present invention, the lubricant oil supply unit comprises: an oil supply pump installed in the frame to supply lubricant oil to the sliding contact portion by a predetermined pumping force; And an oil supply line connected to each of the sliding contact portions and the oil supply pump.

Therefore, the present invention has a ram structure for excluding birds for transferring the table member in the Y-axis direction and conveying the spindle head assembly in the Y-axis direction, unlike the related art, so that the load acting on the needle member By limiting the members, the load of the table member, the needle member and the spindle head assembly in the X, Y, and Z axis directions can be prevented from being concentrated on one side. Since the structure is supported by the needle member which is conveyed to the teeth, the load acting on the needle member is reduced, thereby preventing wear of the transfer unit for raising and lowering the needle member so that failure of the milling machine can be suppressed and machining accuracy can be improved. In addition, the ram drive system that feeds the spindle head assembly in the Y-axis direction provides easy access to the workpiece and at least The Y-axis can be freely transported in the space of the product, and the simple structure without birds is provided. Therefore, it can be supplied to the processing company at a low price, so that it can secure a relative competitive advantage in terms of economy. have.

Hereinafter, a vertical CNC milling machine according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is a perspective view schematically showing the configuration of a vertical CNC milling machine according to a preferred embodiment of the present invention, Figure 2 is a front configuration of Figure 1, Figure 3 is a side configuration of FIG.

1 to 3, the vertical CNC milling machine 100 according to a preferred embodiment of the present invention, unlike the conventional, excludes the saddle (saddle) for feeding the table member 150 in the Y-axis direction And a ram structure for transferring the spindle head assembly 160 in the Y-axis direction to limit the load applied to the needle member 140 to the table member 150, thereby providing the table member 150 and the needle member ( 140 and the spindle head assembly 160 has a structure that can prevent the concentration of these loads to one side during the X, Y, Z axis direction transfer operation.

The vertical CNC milling machine 100 for this purpose, the frame 130 having the base 132, and the reciprocating movement in the Z-axis direction along the column (134: column) installed upright with respect to the base 132 The installed knee member 140 and a workpiece (not shown) to be machined are set, and a table installed on the knee member 140 to be reciprocated in the X-axis direction with respect to the upper surface of the knee member 140. A member 150 and a tool (T: tool) capable of processing a workpiece are mounted and installed vertically with respect to the table member 150 and capable of reciprocating in the Y-axis direction crossing the sliding direction of the table member 150. Spindle head assembly 160 installed on the frame 130 and the X-axis direction provided between the table member 150 and the needle member 140 to reciprocate the table member 150 in the X-axis direction. Y-axis transfer unit 210 and the spindle head assembly 160 Y-axis transfer unit 220 (Fig. 7) provided between the spindle head assembly 160 and the frame 130 to reciprocate in the direction of the direction, and the needle member (to reciprocate the needle member 140 in the Z-axis direction) Z-axis transfer unit 230 (Fig. 9) provided between the 140 and the base 132.

In addition, the vertical CNC milling machine 100 is a conversation type for machining inputs and machining operations using the same NC language as a normal NC machine tool, as well as processing holes, planes, sides, grooves, pockets, etc. by pattern programs. It is made of, and anyone has a numerical control method control member 110 capable of creating a program, and has a structure capable of processing the workpiece in the same sense as a universal machine by the operation of the manual handle 120.

The control member 110 is provided with an operation panel 112 provided with a switch 111 having a plurality of functions has a conventional structure that can automatically control the desired processing by the user's program operation.

The frame 130 is wide at the bottom and has a fan-shaped chip tray 131 capable of collecting chips generated during processing of the workpiece, and a base 132 provided on the upper surface of the chip tray 131. And a chip cover 133 installed upright from the chip tray 131 to prevent the chip from being scattered from the workpiece during processing of the workpiece, and a base at approximately the center of the chip cover 133. The column 134 provided upright to the 132 side is provided.

The frame 130 is provided with a cutting oil lubrication tank (not shown) for lubricating cutting oil to the workpiece side to cool the heat generated by the friction between the tool T and the workpiece during machining of the workpiece, and from the lubrication tank to the workpiece side. It is preferable that a pipe nozzle (not shown) for supplying cutting oil is provided.

The needle member 140 is slidably supported by the column 134 to have a structure that can be moved upward and downward, and the table member 150 is slidably installed in a left and right direction with respect to an upper surface.

The table member 150, unlike the prior art having a structure that slides in the left and right directions with respect to the common saddle (saddle) supported on the upper surface of the needle member 140, the left side with respect to the upper surface of the needle member 140 , Has a structure sliding in the right direction.

The table member 150 has a structure in which the rigidity is increased by forming a box-shaped casting structure, and a plurality of T grooves 151 to which a general vise (not shown) is fastened to set a predetermined workpiece are provided along the length direction. do.

As shown in FIGS. 1 to 4, the spindle head assembly 160 is framed to be reciprocated in a direction crossing with the sliding direction of the table member 150 by the Y-axis transfer unit 220 which will be described later. It is installed on the upper side of 130, is installed perpendicular to the table member 150.

The spindle head assembly 160 has a structure of a conventional spindle head, and includes a spindle motor 161 that provides a rotational force of a predetermined rotational speed and a rotational motion of the spindle motor 161 to rotate. Tool T, for example, has a spindle 162 to which the milling cutter is fastened.

The spindle 162 has a driving pulley 163 installed on the rotation shaft of the spindle motor 161 and a driven pulley 165 connected to the V-belt 164 at one end thereof so as to receive the rotational force of the spindle motor 161. It is installed, and a matching groove 166 to which a tool (not shown) is fitted is provided at the other end.

The spindle 162 is located inside the spindle cover 167 so as to engage the tool T in a simple operation by the selective rotation of the spindle motor 161 is projected into the groove area of the mating groove 166. A drawing bolt 168 is provided.

In addition, the spindle head assembly 160 is provided with a conventional brake member 170 having a brake liner 171 to selectively restrain the rotation of the spindle 162 by a user's manual operation. In addition, a conventional rotational speed adjusting member 180 having an adjustment lever 181 is provided to adjust the rotational speed of the spindle 162 at a high speed or a low speed by a user's selective manual operation. Preferably, the spindle 162 is rotated at 4,500 rpm at high speed and 10 rpm at low speed by the rotation speed adjusting member 180.

The spindle head assembly 160 selectively rotates the spindle motor 161 by a switch action to mount the tool T to the drawing bolt 168 of the spindle 162 or to the drawing bolt 168 of the spindle 162. A conventional tool detachable member (not shown) for disengaging from is provided. Reference numeral 190 denotes a brake lever for operating the brake member 170.

As shown in FIGS. 5 and 6, the X-axis transfer unit 210 includes a needle member (not shown) so that the table member 150 can be reciprocated in left and right directions with respect to the upper surface of the needle member 140. X guide rails 211 formed on the upper surface of the table member 150 in the longitudinal direction of the table member 150 and the X guide rails 211 are complementarily slidably coupled to the table member 150 and the X guide rails 211. The X guide part 212 formed on the bottom surface of the table member 150 so as to slide in the left and right directions within a predetermined length range along the table member so as to be rotatable at a predetermined rotational speed by the X servo motor 213. Sliding the table member 150 in the X-axis direction by converting the rotational movement of the X-ball screw shaft 214 and the X-ball screw shaft 214 installed in the knee member 140 along the longitudinal direction of the 150 to linear movement. It is installed on the bottom surface of the table member 150 so that the X ball screw shaft 214 A threaded X ball screw nut 215 is provided.

Therefore, the table member 150, the X ball screw shaft 214, both ends of which are rotatably supported by the needle member 140 is rotated in the forward and reverse directions by the forward and reverse rotational motion of the X servo motor 213. In this case, since the X ball screw nut 215 is fixed to the table member 150 and screwed to the X ball screw shaft 214, the rotational motion of the X servo motor 213 is converted into linear motion. Sliding in the axial direction.

The X-axis transfer unit 210 is between the X guide rail 211 provided on the upper surface of the needle member 140 and the X guide portion 212 of the table member 150 in sliding contact with the X guide rail 211. A press-fit tapered gib 216 is provided.

The gib 216 is installed to adjust the play of the sliding contact surface of the X guide rail 211 and the X guide portion 212, the X guide rail (by the tightening operation or loosening operation of the adjustment screw 217). 211) and the clearance between the X guide portion 212 is selectively adjusted.

As shown in FIG. 7 and FIG. 8, the Y-axis transfer unit 220 is installed in the frame in a direction intersecting the transfer direction of the table member 150, and the spindle head assembly 160 is mounted on the table member 150. Ram base having a Y-guide rail 221 is provided on the top of the frame 130 so as to be transferred in the front and rear directions intersecting the conveying direction of the () along the conveying direction of the spindle head assembly (FIG. 1). (222: ram base), the spindle head assembly 160 is installed and complementarily slidingly coupled to the Y guide rail 221 of the ram base 222 and along the Y guide rail 221 of the ram base 222 Ram main body 224 having Y guide part 223 to slide forward and backward within a predetermined length range, and ram base 222 to be rotatable at a predetermined speed by Y servo motor 225. Y ball screw shaft 226 installed on the ram body 224 along the longitudinal direction of It is installed on the ram base 222 so as to slide the ram main body 224 in the Y-axis direction by converting the rotational movement of the screw shaft 226 into a linear motion is screwed on the coaxial of the Y ball screw shaft 226 A Y ball screw nut 227 is provided.

Therefore, the ram main body 224, the Y ball screw shaft 226, both ends of which are rotatably supported by the ram main body 224 is rotated in the forward and reverse directions by the forward and reverse rotation movement of the Y servo motor 225. In this case, since the Y ball screw nut 227 is fixed to the ram base 222 and screwed to the Y ball screw shaft 226, the rotational motion of the Y servo motor 225 is converted into a linear motion. Sliding in the axial direction.

The Y axis transfer unit 220 is press-fitted between the Y guide rail 221 provided in the ram base 222 and the Y guide portion 223 of the ram body 224 in sliding contact with the Y guide rail 221. A tapered gib 228 is provided.

The gib 228 is installed to adjust the clearance between the sliding contact surface of the Y guide rail 221 and the Y guide portion 223, and the Y guide rail (by the tightening or releasing action of the adjusting screw 229). The clearance between the 221 and the Y guide part 223 is selectively adjusted.

9 and 10, the Z-axis transfer unit 230 is a longitudinal direction of the column 134 so that the needle member 140 can be transferred in an up and down direction with respect to the column 134. Along the Z guide rail 231 and the Z guide rail 231 is formed to be complementary slidingly coupled to the Z guide rail 231 along the needle member 140 in the predetermined length range along the Z guide rail 231 , Z guide portion 232 formed in the needle member 140 and the stand 235 is rotatable at a predetermined rotational speed by the Z servo motor 233 to be slidable in the downward direction and is provided upright on the base 132. Z ball screw shaft 234 and Z ball screw shaft 234 installed in the needle member 140 to be inserted into a linear movement by converting the rotational movement of the needle member 140 in the Z-axis direction Z The Z ball screw shaft 234 is installed at the end side of the stand 235 into which the ball screw shaft 234 is inserted. And a ball screw nut screwed to a Z 236.

Therefore, the table member 150, the Z ball screw shaft 234, both ends of which are rotatably supported by the needle member 140 is rotated in the forward and reverse directions by the forward and reverse rotation movement of the Z servo motor 233. In this case, since the Z ball screw nut 236 is fixed to the stand 235 and screwed to the Z ball screw shaft 234, the rotational motion of the Z servo motor 233 is converted into a linear motion so that the needle member ( As the 140 is slid in the Z-axis direction, it is transported in the Z-axis direction together with the knee member 140.

The Z-axis feed unit 230 is installed on the rotary shaft 233a of the Z servo motor 233 so as to transmit the rotational force of the Z servo motor 233 to the Z ball screw shaft 234, and the Z ball screw shaft ( 234 has a spiral gear complementary to it.

The Z-axis transfer unit 230 is between the Z guide rail 231 provided on the sliding surface of the column 134 and the Z guide portion 232 of the needle member 140 in sliding contact with the Z guide rail 231. A press-fit tapered gib 237 is provided.

The gib 237 is installed to adjust the clearance of the sliding contact surface between the Z guide rail 231 and the Z guide portion 232, the Z guide rail (by the tightening operation or loosening operation of the adjustment screw 238). The clearance between the 231 and the Z guide part 232 is selectively adjusted.

Vertical CNC milling machine 100 of the present invention, the table member 150 and the sliding contact portion of the table member 150 and the needle member 140 in the X-axis direction (see Figs. 5 and 6), Sliding contact portions of the column 134 and the needle member 140, respectively sliding in the Z-axis direction relative to the column 134 (see Figs. 9 and 10), the ram main body 224 is sliding in the Y-axis direction A lubricant oil supply unit 240 installed on the frame 130 (FIG. 1) may be further provided to selectively supply lubricant oil to the sliding contact portions (FIGS. 7 and 8) of the main body 224 and the ram base 222.

The lubricating oil lubrication unit 240 is connected to the lubricating oil pump 241 installed on the frame 130 and the sliding contact and the lubricating pump 241 so as to supply the lubricating oil to each sliding contact by the predetermined pumping force An oil supply line 242 is provided.

The oil supply pump 241 preferably has a structure that generates a buzzer sound when the flow rate of the lubricating oil falls below a predetermined amount so that the user can recognize that the lubricating oil is insufficient.

Therefore, the lubricating oil supplied from the oil supply pump 241 is lubricated to each sliding contact portion through the oil supply line 242, thereby preventing the respective sliding contact portions from being worn.

As shown in FIG. 1, the vertical CNC milling machine 100 of the present invention removes chips by spraying compressed air to the workpiece side processed by the tool T, or chips scattered on the table member 150. It is provided with an air injection unit 250 for removing.

The air injection unit 250 and the compressed air tank 251 installed on the frame 130, and the compressed air tank 251 so as to spray the compressed air of the compressed air tank 251 to the table member 150 side and A connected hose 252 and an air jet nozzle 253 connected to the hose 252 and disposed on the spindle head assembly 160 side.

Therefore, the compressed air contained in the compressed air tank 251 is sprayed to the table member 150 side through the air injection nozzle 253.

Referring to the operation of the vertical CNC milling machine according to a preferred embodiment of the present invention configured as described above are as follows.

As shown in FIG. 1, the vertical CNC milling machine 100 of the present invention is provided with a table member at the same time as installing a tool T for a predetermined machining purpose on the spindle 162 (FIG. 2) of the spindle head assembly 160. In the state where a predetermined work is set on the upper surface of 150, the table member 150 is transferred in the X and Z-axis directions, and the spindle head assembly 160 is transferred in the Y-axis direction. The workpiece is machined according to the program of. Hereinafter, for convenience, the table members 150 are transported in the X-axis direction, the headstock assembly 160 is transported in the Y-axis direction, and the table members 150 are transported in the order in which they are transported in the Z-axis direction. However, the present invention is not limited thereto, and the X, Y, and Z-axis feeds are not made in order according to the machining program, and it may be made regardless of the order.

5 and 6, in order to transfer the table member 150 in the X-axis direction, first, the X servo motor 213 is driven.

Then, the X ball screw shaft 214 fixed to the needle member 140 is selectively rotated forward and backward by the X servo motor 213, and the rotational motion of the X ball screw shaft 214 is the table member 150. Is converted to linear motion by an X ball screw nut 215 that is fixed to and screwed to the X ball screw shaft 214.

Subsequently, the table member 150 is guided to the needle member 140 as the X-ball screw shaft 214 is rotated in the forward and reverse directions by the X-servo motor 213 (left-right direction (X-axis direction)). Is sliding.

As shown in FIG. 7 and FIG. 8, in order to transfer the spindle head assembly 160 in the Y-axis direction, the Y servo motor 225 is first driven.

Then, the Y ball screw shaft 226 fixed to the ram body 224 is selectively rotated forward and backward by the Y servo motor 225, and the rotational movement of the Y ball screw shaft 226 is the ram base 222 Is converted to linear motion by a Y ball screw nut 227 fixed to the screw and screwed to the Y ball screw shaft 226.

Subsequently, the ram main body 224 is guided to the ram base 222 as the Y ball screw shaft 226 is rotated in the forward and reverse directions by the Y servo motor 225 (Y-axis direction). Is sliding.

9 and 10, in order to transfer the table member 150 in the Z-axis direction, first, the Z servo motor 233 is operated in the forward and reverse modes to drive the spiral gear 237.

Then, the Z ball screw shaft 234 fixed to the needle member 140 is selectively rotated forward and backward by the driving of the spiral gear 237, and the rotational movement of the Z ball screw shaft 234 is the stand 235. Is converted into linear motion by a Z ball screw nut 236 that is fixed to and screwed to the Z ball screw shaft 234.

Subsequently, the needle member 140 is guided to the column 134 as the Z ball screw shaft 234 is rotated in the forward and reverse directions by the Z servo motor 233 in the up and down directions (Z-axis direction). Is sliding. Therefore, the table member 150 supported by the needle member 140 is transferred in the Z-axis direction by the above-described operation.

Meanwhile, as shown in FIGS. 1 and 4, the spindle 162 of the spindle head assembly 160 in which the tool T is mounted is rotated at a predetermined rotation speed of the spindle motor 161. The drive pulley 163 and the driven pulley 165 connected to the V-belt 164 installed on the rotating shaft of the rotating by receiving the rotational force of the spindle motor 161. Then, the workpieces set on the table member 150 are moved in the X- and Z-axis directions, and the spindle head assembly 160 is moved in the Y-axis direction, so that the workpieces and the movements and tools thereof are transferred. It is processed into a predetermined shape by the rotation operation of (T).

As described above, the vertical CNC milling machine according to the preferred embodiment of the present invention has the following effects.

First, unlike the prior art, it has a ram structure for excluding birds for transferring the table member in the Y-axis direction and transferring the spindle head assembly in the Y-axis direction, thereby limiting the load acting on the needle member to the table member. This prevents the load of the table member, the needle member, and the spindle head assembly from concentrating their loads to one side during the X, Y, Z axis direction feeding operation.

Second, since the table member conveyed in the X-axis direction has a structure supported by the needle member conveyed in the Z-axis direction, unlike the related art, the wear of the transfer unit for raising and lowering the needle member as the load applied to the needle member is reduced. Is prevented so that failure of the milling machine is suppressed and the machining precision is improved.

Third, the ram drive system for transporting the spindle head assembly in the Y-axis direction facilitates access to the workpiece, and allows the Y-axis to be easily moved in the minimum space.

Fourth, because of the simple structure that excludes birds, it can be supplied to a processing company at a low price, thereby securing a relative competitive advantage in terms of economy.

Claims (7)

Frame with base; A knee member installed to reciprocate in the Z-axis direction along a column installed upright with respect to the base; A work piece to be processed is set, and a table member installed on the needle member to reciprocate in the X-axis direction with respect to the upper surface of the needle member; A tool (tool) for processing the workpiece is provided, is installed perpendicular to the table member, the spindle head assembly installed in the frame to be reciprocated in the Y-axis direction crossing the sliding direction of the table member ( spindle head assembly); An X-axis transfer unit provided between the table member and the needle member for reciprocating the table member in the X-axis direction; A Y-axis feed unit installed between the spindle head assembly and the frame to reciprocate the spindle head assembly in the Y-axis direction; And And a Z axis transfer unit provided between the needle member and the base to reciprocate the needle member in the Z axis direction. The method of claim 1, The X axis transfer unit is: An X guide rail formed on an upper surface of the needle member so as to reciprocally slide the table member in a left and right direction with respect to an upper surface of the needle member; An X guide part formed along a length direction on a bottom surface of the table member to be slidably coupled to the X guide rail; An X-ball screw shaft rotatable at a predetermined rotational speed by an X-servo motor and installed in the knee member along a length direction of the table member; And It is provided on the bottom surface of the table member so as to slide the table member in the X-axis direction by converting the rotational movement of the X-ball screw shaft into a linear movement, provided with an X ball screw nut screwed to the X ball screw shaft Vertical CNC milling machine. The method of claim 1, The Y axis transfer unit is: A ram base installed on the frame in a direction crossing the transfer direction of the table member and having a Y guide rail to move the spindle head assembly in a forward and backward direction with respect to the table member; A ram main body having the main head assembly installed therein and having a Y guide part to be slidably coupled to the Y guide rail of the ram base; A Y ball screw shaft rotatable at a predetermined rotational speed by a Y servo motor and installed in the ram body along a length direction of the ram base; And It is provided with a Y ball screw nut which is installed on the upper surface of the ram base so as to slide the ram main body in the Y axis direction by converting the rotational movement of the Y ball screw shaft into a linear motion. Vertical CNC milling machine. The method of claim 1, The Z axis transfer unit is: A Z guide rail provided in the column to transfer the needle member in an up and down direction with respect to the column; A Z guide part provided on the needle member corresponding to the column to be slidably coupled to the Z guide rail; A Z ball screw shaft rotatable at a predetermined rotational speed by a Z servo motor and installed on the knee member to be inserted into a stand provided upright on the base; And Z screw screwed to the Z ball screw shaft is installed on the end side of the stand is inserted into the Z ball screw shaft to convert the rotational movement of the Z ball screw shaft into a linear movement to slide the needle member in the Z-axis direction Vertical CNC milling machine comprising a ball screw nut. The method of claim 4, wherein The Z axis transfer unit is: Vertical type, characterized in that it is further provided with a spiral gear is installed on the rotating shaft of the Z servo motor so as to transmit the rotational force of the Z servo motor to the Z ball screw shaft, and meshed with the Z ball screw shaft. CNC milling machine. The method according to any one of claims 1 to 4, The table member is slid in the X-axis direction and the sliding contact portion of the needle member which is slid in the Z-axis direction with respect to the column, respectively, and so that the lubricant can be supplied to the sliding contact portion of the ram base that the ram body is slid in the Y-axis direction A vertical CNC milling machine, further comprising a lubricant oil supply unit installed in the frame. The method of claim 6, The lubricant oil supply unit is: An oil supply pump installed in the frame to supply lubricant oil to the sliding contact portion by a predetermined pumping force; And And an oil supply line connected to each of the sliding contact portions and the oil supply pump.