KR960005359Y1 - Turret head in spindle feeding type horizontal machining center - Google Patents

Abstract

None.

Description

Turret head of main side horizontal machining center

1 is a front view showing a spindle-type horizontal machining center according to the present invention.

2 is a side cross-sectional view of the main part of FIG.

3 is a cross-sectional view seen from the bottom of FIG.

* Explanation of symbols for main parts of the drawings

10: Bed 11, 20, 30: Straight guide

12, 21, 31: Ball screw 13: Slide block

15, 70: hydraulically driven servo motor 25, 35: AC servo motor

23: column 34: headbody

50: turret head 51: multi-sided

52, 53: coupling 54: cylindrical boss

55: hollow part 56: driven gear

60: single rod double acting hydraulic cylinder 63: port A

64 Port B 65 Cylinder Tube

66: head cover 68: hydraulic cylinder

72: reduction gear group 74: final deceleration stage

75: electric gear 76: rotary encoder

80: spindle axis 82: driven gear

84: tool clamping device 85: spindle motor

90: clutch 92: motive gear

95: oil

The present invention relates to a turret head of a spindle-type horizontal machining center. More specifically, it is possible to carry out multiple positioning and to mount a turret that can be equipped with multiple tools and a horizontal spindle of the machining center. A turret head of a spindle moving horizontal machining center adapted for an automatic production line of production.

In general, the machining center is capable of automatic machining in a variety of shapes on large workpieces by using an automatic tool changer and an automatic tool standby device, and it is possible to automatically multi-sided machining by pallets and tables. The technology is equipped with a heavy, high-strength structure that supports the entire machine against the ground, and a straight guide in the left and right directions and a ball screw parallel to it are installed on the upper surface of the bed. By driving the ball screw using a hydraulically driven servomotor, the slide block has a high load driving force and is capable of positioning in the left and right directions, and a linear guide in the left and right directions on the upper surface of the slide block. Install another front and rear straight guide and ball screw perpendicular to the The column on which the spindle type is installed is vertically rolled to form a cloud-coupling and is driven by the front and rear ball screw AC servomotors so that the column can be positioned forward and backward. Another vertical and horizontal guide and ball screw perpendicular to the front, rear left and right linear guides are installed vertically on one side of the vertical plane, and the head body is provided with a horizontal spindle shaft. By combining and driving the ball screw in the up and down direction by using the AC servo motor, the head body can be positioned in the up and down direction, allowing the three-dimensional face machining of the workpiece freely according to the machining program. have.

On the other hand, an automatic tool changer is provided on one side of a spindle shaft of a machine tool that is automatically operated as described above for automatically exchanging various kinds of tools according to a series of machining operations. It is connected with the automatic tool waiting device in the form of circular partition table or conveyor belt which is circulated in equal division, and it automatically snaps the tool positioned according to the exact circular motion of the automatic tool waiting device and inserts it into the spindle axis of the machine tool. Function and to take out the tools that are not needed in the spindle axis.

First, after machining the workpiece to be processed by the machining center at the predetermined position of the machining table of the machining center, and then operating the machining center according to the predetermined machining program, the automatic tool waiting apparatus is circulated according to the control program. The tool is brought to the correct position to be replaced, and then the automatic tool changer is operated to grab the necessary tool from the automatic tool changer and move to the spindle axis where the tool is not inserted to fit the tool necessary for the spindle axis. When the automatic tool change is completed, the spindle axis automatically moves to the machining point to automatically process the workpiece, and when the tool needs to be replaced, the automatic tool changer is operated so that it is unnecessary from the spindle axis. Pull out the tool It is inserted into the empty slot of the machine. Afterwards, the automatic tool changer moves away from the automatic tool waiter at a predetermined distance. At the same time, the automatic tool waiter circulates a number of tools to meet the current needs. The tool is brought to the tool change position, and the automatic tool changer is operated again to remove the tool from the automatic tool standby device and to insert the tool into the empty spindle shaft to automatically change the tool.

However, the machining center of such a structure caused the complexity of the whole machine configuration because the automatic tool standby device and automatic tool changer, which are essential for the automation line configuration, are installed separately from the workpiece processing unit to realize automatic tool change. It took a lot of time and space, and there was a cumbersome problem of comprehensive review to prevent the collision and interference with peripheral devices and jigs (JIG), the workpiece.

In addition, precise work is required for disassembling the machine, centering the spindle axis for tool replacement during tool assembly, precise tool positioning in the automatic tool changer, and tool positioning in the automatic tool standby device. A countermeasure for each position shift due to vibration and noise was required, and there were problems that caused inefficiency of the measures when a failure occurred because the sensors were installed in various places to cause difficulty in repairing and checking each position.

The present invention has been made to solve the above-mentioned problems. The object of the present invention is to provide a high speed, a small amount of tools in a state in which machining operations assigned to each machining center are limited as the machining centers are equipped and operated in several automation lines. It is to provide the turret head of the spindle type horizontal machining center which can be exchanged with high precision.

In order to achieve the object of the present invention, in the spindle type horizontal machining center equipped with a head body, the spindle shaft is installed, two positioning couplings in the form of a disk-like mating on the front of the head body The piston rod end of the single rod type double acting hydraulic cylinder having two ports for sucking and discharging the piston rod is slidably coupled to the hollow polygonal turret head having a cylindrical boss formed in the center for free rotational movement. The cylinder tube of the single rod type double acting hydraulic cylinder is fixedly coupled to the head body while slidingly passing through the hollow portion of the cylindrical boss of the turret head, which is the center of rotation of the turret head, and slidingly coupled with the hollow portion. Through two ports A and B formed in the single rod type double acting hydraulic cylinder By converting the oil flow path of the oil supply to the front and rear of the turret head in accordance with the movement of the cylinder tube before and after, and on the rear of the head body of the hydraulic drive-type servo motor for positioning the turret head equally divided and A reduction gear group for decelerating the power generated from the hydraulically driven servomotor, and a rotary encoder for detecting the rotational position of the turret head at the final deceleration end of the reduction gear group, and on the outer circumference of the cylindrical boss of the turret head A driven gear that is engaged with the electric gear of the deceleration stage is installed, and a plurality of spindle shafts radially installed at the center of rotation of the turret head are respectively cloud-coupled so as to freely rotate the radiation in the twisted direction on various surfaces of the turret head. Power for machining the workpiece on one of the spindle axes, In order to transfer, the driven gear is installed at the rear end of each spindle shaft, and the main shaft movable type according to the present invention is installed on the head body by installing a driven gear with a clutch engaged with one of the spindle shaft and a spindle motor serving as a driving source of the spindle shaft. The turret head of a horizontal machining center is provided.

Hereinafter, an embodiment of a turret head of a spindle-type horizontal machining center according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 shows an embodiment of the turret head of the spindle-type horizontal machining center according to the present invention, as shown in the upper surface of the bed (10) for supporting the entire mechanical device located on the lowest surface of the machine A straight guide 11 in the left and right directions on the slide block and slides the slide block 13 therein, and a ball screw 12 parallel to the straight guide 11 is installed on the upper surface of the bed 10. The preload nut (not shown) coupled with the ball screw 12 is coupled to the slide block 13, and a hydraulic drive type servomotor 15 is installed at one end of the ball screw 12 to provide the slide block. While the left and right positioning of (13) is made possible, another front and rear linear guide (20) perpendicular to the left and right linear guides (11) is provided on the upper surface of the slide block (13). ) And the ball screw (21) and the turret head (50) The turret head 50 attached to the column 23 is moved by vertically setting up the column 23 to be vertically cloud-coupled and installing the AC servo motor 25 at one end of the front and rear ball screws 21. · Make positioning free in the backward direction.

In addition, on one vertical upper surface of the column 23, the straight guides 30 and the ball screw 31 in the up and down directions perpendicular to the front and rear left and right straight guides 20 and 11 are disposed. Install and slide the head body 34 with the turret head 50 thereon, and install the AC servo motor 35 at one end of the upper and lower ball screws 31 to raise the turret head 50. Allow positioning in the downward direction.

The polygon turret head 50 is installed on the front surface of the head body 34 in which the movement in the up and down directions is free, and the polygonal turret is freely positioned in the state of biting a plurality of tools T. 50 will be described with reference to FIGS. 2 and 3 of the accompanying drawings.

First, on the front surface of the head body 34, a hollow regular turret having a cylindrical boss 54 formed in the center via two positioning couplings 52 and 53 in the form of disk-shaped mating. The piston of the single rod type double acting hydraulic cylinder 60 having two ports A 63 and B 64 for sucking and discharging the piston rod 62 while slidingly coupling the head 50 to the rotational movement freely. The tip of the rod 62 is slid through the hollow part 55 of the cylindrical boss 54 of the turret head 50, which is the center of rotation of the turret head 50, and is slidably engaged with the hollow part 55. It is fixed to the head body 34, the cylinder tube 65 of the single rod type double acting hydraulic cylinder 60 is bound to the front center of the turret head 50, the fund rod type double acting hydraulic cylinder (60) By converting the flow path of the oil supplied through the two ports A (63) and B (64) formed in the The turret head 50 is interlocked with the front and back according to the front and rear movement of the cylinder tube 65, and the hydraulic pressure for equally positioning the turret head 50 on the rear surface of the head body 34. The reduction gear group 72 for reducing the power generated from the driven servomotor 70 and the hydraulically driven servomotor 70, and the turret head 50 at the final deceleration stage 74 of the reduction gear group 72. While the rotary encoder 76 for rotational position detection is provided, the driven gear 56 meshes with the electric gear 75 of the final reduction gear 74 on the outer circumference of the cylindrical boss 54 of the turret head 50. And a plurality of spindle shafts (80) radially installed at the center of rotation of the turret head (50) on the polygonal surface (51) of the turret head (50) in the twist direction. Each spin freely, one spin in a horizontal position of each spindle axis 80 A prime mover 92 and a spindle shaft 80 with a clutch 90 provided with a driven gear 82 at the rear end of each spindle shaft 80 so as to transmit power for machining the workpiece to the shaft 80. The spindle motor 85 serving as a driving source of the motor is provided on the head body 34.

In addition, a ball clamping device 84 is provided at the tip of each spindle shaft 80 so that the tool T fitted to each spindle shaft 80 cannot be separated from the spindle shaft 80.

The single rod type double acting hydraulic cylinder 60 is the piston rod 62 is the fixed side and the cylinder tube 65 is the movable shaft when the single rod type double acting hydraulic cylinder 60 is the piston rod 62. The tip of the flange is in the form of a flange on the flange surface 61 is formed with a plurality of fastening holes (61a) for fastening the bolt to the head body 34, the cylinder tube (65) to the head body (34) In order to fasten, it forms a rather thick and short form, and forms several fastening holes 65a which penetrate the both ends of the thickness tube of this cylinder tube 65, covering the head cover 66, and the counter hole 66a of this head cover 66. And bolted to the turret head 50 through the fastening hole 65a of the cylinder tube 65, the single rod type double acting hydraulic cylinder 60 is configured to operate with high torque while having a short stroke.

The polygon turret head 50 may be implemented in any of a variety of integer division of the quadrilateral or more circumference within the scope not departing from the scope of the present invention and in the present invention embodiment is formed in a hexagonal shape It was.

Hydraulic cylinder 68 for supporting the moment load that is weighted on the upper and lower linear guide 30 and the ball screw 31 according to the installation of a rather heavy turret head 50 on the head body 34 The cylinder tube 68a of the hydraulic cylinder 68 is installed vertically on the column 23, and the tip of the piston rod 68b of the hydraulic cylinder 68 is the head body 34. The turret head 50 moves up and down simultaneously with the head body 34 by being fastened to the upper surface of the head body 34 so as to be operated simultaneously with the drive of the AC servo motor 35 to apply the up and down movement to the head body 34. It is configured to prevent sag and lowering of positioning accuracy due to its own weight.

In the figure, reference numeral 95 denotes an oil.

The operation of the present invention as described above is as follows.

3 is a view illustrating a state in which the spindle axis of the turret head of the spindle-type horizontal machining center according to the present invention is finished immediately after machining and immediately before exchanging a necessary tool. Only one horizontal position spindle shaft 80 of the shaft 80 receives the rotational power from the spindle motor 85 through the clutch 90, the prime gear 92, the driven gear 82, and bites the tool. When the workpiece is rotated at high and low speeds and the signal of a new tool is required from the predetermined machining program, the power transmission clutch 90 first falls, and thus the spindle side on which the power is being transmitted from The rotation of the 80 stops and the turret head 50 is free to rotate when only the engagement couplings 52 and 53 are engaged. do.

In this state, the single rod type double acting hydraulic cylinder 60 is operated to drop only the engagement of the positioning couplings 52 and 53 in this state, and this operation sequence is performed by removing the turret head 50 from the machining program. When the command to pull out is dropped, a single-rod double acting hydraulic pressure is applied to the two- or four-port solenoid valve (not shown) for the flow path conversion attached to the machine according to this command, converting the electrical weak signal into a mechanical flow path conversion. The cylinder tube 65 of the cylinder 60 is converted in the direction of pushing forward, and the oil 95 which has a strong pressure by the oil pump (not shown) and the hydraulic tank (not shown) is the solenoid valve (not shown). Flow path is formed to supply oil 95 through port A 63 of the single rod type double acting hydraulic cylinder 60, and at the same time, oil 95 is discharged through port B 64 and the cylinder is discharged. Tube (65) Pushing forward, the turret head 50, which is fastened to it, comes out together.

At this time, the turret head 50 is in a state where no resistance is received by the positioning couplings 52 and 53 and slides on the outer circumference of the piston rod 62 of the single rod type double acting hydraulic cylinder 60. It is free to rotate.

In this state, in order to rotate the turret head 50 as shown in FIG. 2 as shown in FIG. 2, the hydraulic drive type servomotor 70 installed on the rear side of the head body 34 is operated. When the motor 70 rotates according to a predetermined machining program, the reduction gear group 72 which decelerates the power from the hydraulically driven servomotor 70 generates the power generated from the hydraulically driven servomotor 70. Received and decelerated to transmit to the driven gear 56 formed on the outer periphery of the cylindrical boss 54 formed inside the turret head 50, at the same time the turret head 50 has a high torque to rotate at low speed .

At this time, the rotary angle of the turret head 50 is rotated by the rotation angle detection rotary encoder 76 installed in the final deceleration end 74 of the reduction gear group 72 in order to equally position the rotating turret head 50. The rotation position information is counted and input to the main controller (not shown) from time to time. The turret head 50 may be compared with the rotation angle information of the turret head 50 and the stop angle data preset in the main controller (not shown). ) Does not reach the correct position, the rotary drive information is fed back from the rotary encoder 76 while continuously rotating the hydraulic drive motor 70 in the rotating direction, and the turret head 50 is fixed. When the position is reached, the rotating hydraulic drive motor 70 is suddenly stopped.

In the above operation, when the turret head 50 reaches the fixed position and comes to a stop state, the turret head 50 is returned to its original position by the single rod type double-acting hydraulic cylinder 60 which is pulled forward. The determination couplings 52 and 53 make a high-precision positioning. This operation can be realized by moving the cylinder tube 65, which has been removed from the front side, to the rear side again. The solenoid valve (not shown) is realized by converting the flow paths of the oil 95 flowing into the two port A 63 and the port B 64 provided in the rod-type double acting hydraulic cylinder 60. When automatically operated by a controller (not shown), the port B 64 becomes the inflow side and the port A 63 becomes the discharge side. At this time, the oil 95 which is high pressure delivered by the oil pump (not shown) is the port B. Flowed into (64) The cylinder body 65 and the turret head 50 fastened thereto is pushed toward the rear.

Follower gears of the spindle shaft 80 to give a rotational movement to the machining-side spindle shaft 80 installed on the turret head 50 positioned with high accuracy by the positioning couplings 52 and 53 as described above. The clutch 90 and the motive gear 92 which are separated from the 82 are engaged with each other. When the spindle motor 85 rotates, the tool and the spindle shaft 80 exchanged on the turret head 50 rotate. The spindle 10, the slide block 13, the column 23, the head body 34, which are the main shaft feeders, are the linear guides 11, 20, 30 and the ball screw 12, ( 21). By 31, another machining operation of the workpiece is performed.

When the present invention is applied as described above, the spindle moving machining center, which has been applied to the automation line of the existing mass production, requires a separate tool holding device and a tool changing device for tool change. The head and spindle shaft are integrated to shorten the tool change time, and the structure is simple, making it easy to manufacture and taking up less installation space, thus effectively avoiding collision and interference with peripheral devices. It is easy to repair, repair, and maintain the machine's life for a long time while maintaining high precision.

Claims (2)

In a spindle moving horizontal machining center equipped with a head body on which a spindle shaft is installed, two positioning couplings (52) and (53) are formed on a front surface of the head body (34) in the form of a disk-like pair. Two ports A 63 for sucking and discharging the piston rod 62 while slidingly coupling the hollow regular turret head 50 having a cylindrical boss 54 in the center thereof so as to rotate freely. The hollow part of the cylindrical boss 54 of the turret head 50, which is the center of rotation of the turret head 50, is connected to the tip of the piston rod 62 of the single rod type double acting hydraulic cylinder having the port B 64 ( 55 to slide and pass through the hollow portion 55 to be fixedly coupled to the head body 34, and the cylinder tube 65 of the single rod type double acting hydraulic cylinder 60 is the turret head ( Bound to the front center of the 50) to the single rod type double acting hydraulic cylinder (60) By converting the flow path of the oil supplied through the two formed port A (63) and port B (64), the turret head 50 is interlocked before and after the front and rear movement of the cylinder tube (65), On the rear surface of the head body 34, a hydraulic drive servomotor 70 for equally positioning the turret head 50 and a reduction gear group for reducing power generated from the hydraulic drive servomotor 70. (72) In the final reduction gear stage 74 of the reduction gear group 72, the rotary encoder 76 for detecting the rotation position of the turret head 50 is provided, while the cylindrical boss 54 of the turret head 50 is provided. On the outer circumference of the driven gear 56 is meshed with the electric gear 75 of the final reduction stage 74, a plurality of spindle shafts (80) radially installed at the center of rotation of the turret head (50) On the polygonal surface 51 of this turret head 50, the rotation of the radiation in the twist direction is free. Complementary gears 82 are provided at the rear end of each of the spindle shafts 80 in order to transmit the workpiece machining power to one of the spindle shafts 80 positioned in a horizontal position. And a spindle motor 85 which is a driving source of the drive gear 92 and the spindle shaft 80 with the clutch 90 engaged with the clutch 90, and is installed on the head body 34. Balanced Machining Center. According to claim 1, wherein the polygonal turret head (50) is a spindle-type horizontal machining center, characterized in that the six spindle axis (80) is installed hexagon.