KR101106041B1 - Automatic works change device for machining center - Google Patents

Abstract

PURPOSE: An automatic workpiece exchange device of machining center is provided to enable a user to stably perform the movement and stop of first and second pallets without clearance. CONSTITUTION: An automatic workpiece exchange device of machining center comprises a feeding unit(42) supplying and drawing out work piece to and from machine center. The feeding unit comprises a fixed rail(35) and first and second pellets(60,90). The fixed rail comprises the motor and pinion. The motor is fixed on a lift frame and is installed in the floor side. The pinion is rotated using the power of the motor. The first pellet is placed on the fixed rail. A rack is installed in the bottom of the first pellet and meshed with the pinion. The first pellet receives the power of the motor and reciprocates forward and backward. The second pellet is placed on the first pellet.

Description

Automatic workpiece changer in machining centers {AUTOMATIC WORKS CHANGE DEVICE FOR MACHINING CENTER}

The present invention relates to a workpiece changer of a machining center, and in particular, to supply and withdraw the workpiece more quickly, and to move and stop the first and second pellets in the movement to the correct position without play. It relates to a workpiece automatic changer of a machining center.

As is well known, the machining center is a complex machine tool that combines boring machine, milling machine and drilling machine into one, and is divided into vertical machine, horizontal machine and vertical and horizontal machine type according to the direction of movement of the main axis. There are three operations of the machining center: linear motion, rotational motion and spindle rotation. These motions are controlled by the numerical servo (NC) servo and NC spindle.

On the other hand, the machining center is provided with a workpiece exchange device for automatically supplying and withdrawing the workpiece for machining to the machining center.

The workpiece changer automatically feeds the workpiece onto the machining tool in the machining center, and withdraws the finished workpiece, transfers it to the set position, clamps the new workpiece to the machining center, and supplies the workpiece. Withdrawal is made continuously.

However, in the conventional workpiece exchange device, it is common that only one unit is provided with a supply unit, which is a means for supplying and withdrawing a workpiece into a machining center, thus causing the following problems in the supply and withdrawal of the workpiece.

In other words, when the workpiece is supplied into the machining center, the supply unit waits in front of the machining center for the time that the workpiece is being processed. By removing other workpieces before processing and feeding them to the machining center, the feeding and withdrawal operations of the workpieces are not only inefficient, but also cause unnecessary problems in workability and productivity due to unnecessarily delayed work time.

In addition, the supply unit generally feeds and withdraws the workpiece into the machining center by rotating the table in a turntable manner, and thus, a phenomenon in which the supply unit interferes with various components provided in the machining center often occurs.

(Prior art document)

Document 1: Korea Patent Office Registered Patent Publication No. 10-0816637

Accordingly, an object of the present invention for solving the problems as described above is to automatically change the workpiece of the machining center for the first and second pellets sequentially withdraw operation to move and stop to the correct position without play In providing.

Another technical problem to be achieved by the present invention is to provide a machining unit with a plurality of feed units for supplying and withdrawing a workpiece into the machining center, as necessary, on a workpiece changer, so that the feeding and withdrawing work of the workpiece can be performed more quickly. To provide an automatic workpiece changer.

The present invention for achieving the above object is a lifting unit equipped with a lifting base which is mounted on the base and left and right reciprocating movement of the rail, and the lifting frame is provided by the power of the motor, and the workpiece is installed on the lifting frame In the automatic work piece exchange apparatus of the machining center comprising a supply unit for supplying and withdrawing to the machining center, the supply unit is fixedly installed on the lifting frame, the motor is installed on the bottom surface, the upper surface is rotated by the power of the motor A fixed rail to which a pinion is installed, and a rack which is mounted on the fixed rail and engaged with the pinion at a lower end thereof, the first pellet being reciprocated before and after receiving power from the motor, and on the first pellet. Raised and moved back and forth with the first pellets to feed and withdraw the workpiece into the machining center. It includes a second pellet, a fixed sprocket is installed on the upper surface of the fixing rail, a moving sprocket is installed on the lower surface of the second pellet, the first and second idle rollers are provided before and after the first pellet. The first and second idler rollers are configured to be wound around the chain, and the chain rotates according to the movement of the first pellets in a state of being bitten by the fixed and movable sprocket, and the second movable sprocket is installed. It is configured to move the pellets, characterized in that for moving the second pellets at a speed faster than the moving speed of the first pellets.

The present invention allows the first and second pellets to be sequentially drawn out to move and stop the work to the correct position without play, so that more accurate and stable work can be achieved, and the feed unit as needed It is provided with a plurality of phases to enable the supply and withdrawal work of the work more quickly has the effect of improving the work efficiency and productivity.

1 is a view schematically showing the automatic workpiece exchanger installed in the machining center according to the present invention.
Figure 2 is a front view showing the configuration of the automatic workpiece exchanger according to the present invention.
3 shows the side of FIG. 2;
4 is a diagram three-dimensionally showing the configuration of the lifting unit shown in FIG.
5 is a diagram three-dimensionally showing the configuration of the supply unit shown in FIG.
6 is a front cross-sectional view of FIG.
7 is a side cross-sectional view of FIG.
8 is an operational state diagram of the supply unit shown in FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In the following detailed description, exemplary embodiments of the present invention will be described in order to accomplish the above-mentioned technical problems. And other embodiments that can be presented with the present invention are replaced by the description in the configuration of the present invention.

Hereinafter, a detailed description of a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a view schematically showing a machining center 200 and a workpiece automatic exchange device for automatically supplying and withdrawing a workpiece to the machining center 200. Referring to the drawings, the workpiece automatic implementation is realized in the present invention. The exchange device 100 automatically supplies the work 1 to the machining center 200 according to the operation of the moving unit 12, the lifting unit 24, and the supply unit 42, and the finished work 1 Withdrawal) to perform the operation of moving to a separate storage die, the detailed configuration of the automatic workpiece exchanger will be easily understood through the description of Figures 2 to 7 to be described later.

Referring to FIGS. 2 to 7, the automatic workpiece exchanger 100 has a rectangular shape and forms an appearance with a base 10 placed on a plurality of rails 20, and the base 10 is moved up and down with the mobile unit 12. The unit 24 and the supply unit 42 are installed.

The moving unit 12 is a device for moving the base 10, which is the automatic workpiece exchanger 100, to the left and right directions through the rail 20, and as shown in FIG. 3, the motor 14. And a pinion 16 coupled to the shaft of the motor 14 to forward and reverse rotation, wherein the pinion 16 is provided on a fixed frame 22 installed between the rails 20. Meshes with the rack 18. That is, when the shaft rotates by the power of the motor 14, the pinion 16 moves in the left and right directions along the rack 18 according to the rotation direction, and thus the base 10 rides on the rail 20. You can move left and right.

On the other hand, the lifting unit 24 is an apparatus for vertically moving the work piece 1 up and down so that the work piece 1 can be easily supplied and withdrawn without interfering with the components in the machining center 200, The detailed configuration of the lifting unit 24 will be described with reference to FIGS. 3 and 7.

3 and 4, the lifting unit 24 has a motor 26 installed in the base 10, and the motor 26 has a drive shaft 28 installed horizontally in the base 10. It is connected to the forward and reverse rotation by the power of the motor 26. A driven shaft 30 is installed at the upper end of the drive shaft 28 in the same line, and the driven shaft 30 is connected to the drive shaft 28 and the chain 36 by interlocking with the rotation of the drive shaft 28. , Reverse rotation. Here, the chain 36 is wound or unwound according to the rotation of the drive shaft 28 to move the lifting shaft 32 and the lifting frame 34 to be described later, up and down. That is, as shown in FIG. 4, the chain 36 passes through the driving shaft 28 and the driven shaft 30 in order with the spring 38 connected to one end, and then passes through the lifting frame 34. After the lifting shaft 32 is installed, it is fixed to the fixing pin 40 fastened to the upper plate of the base 10 described above. That is, when the drive shaft 28 is rotated forward and reverse by the power of the motor 26, the chain 36 is wound or unwound by the power of the drive shaft 28, and the lifting shaft 32 is in the process. It moves up and down by the operation of 36 to raise and lower the lifting frame 34.

On the other hand, a plurality of the supply unit 42 is installed on the elevating unit 24, preferably the elevating frame 34, and moves in the front and rear directions, respectively, by the power of each individual motor 44, the workpiece (1) ) Is supplied to the machining center 200, and the detailed configuration of the supply unit 42 as a device for withdrawing the finished workpiece (1) from the machining center 200 will be described with reference to the accompanying Figures 5-7. Shall be.

The supply unit 42 is largely divided into a fixed rail 35, and the first and second pellets (60, 90).

The fixed rails 35 are fixedly installed on the elevating frame 34 of the elevating unit 24 described above, and a plurality of fixed rails 35 are installed at both sides of the first roller 48 at predetermined intervals. The first roller 48 moves forward and backward of the first pellets 60 in a state of being fitted into the first guide grooves 66 of the guides 64 installed on both sides of the first pellets 60. The guide will be made to be stable.

A motor 44 is installed below the fixed rail 35, and the pinion 46 is coupled to the pinion 46 while the shaft of the motor 44 passes through the fixed rail 35. The rack 61 installed in the first pellets 60 is engaged.

In addition, the fixing sprocket 50 is installed at the center of the upper surface of the fixing rail 35. The fixed sprocket 50 is a rod-shaped tooth 52 is formed on the upper surface for the chain 80 to be bite.

The first pellet 60 is moved forward and backward by receiving the power of the motor 44, which is the driving source, and has a flat plate type plate 62 at the center and guides 64 at both sides of the plate 62. It is manufactured in a provided shape and is settled on the fixing rail upper surface so as to be movable.

A rack 61 is provided at one lower end of the plate 62 of the first pellet 60, and the rack 61 is coupled to the shaft of the motor 44 described above, and the pinion 46 is rotated forward and backward. The first pellets 60 are moved in the forward and backward directions while being linearly engaged by the rotation force of the pinion 46.

In addition, the first and second shafts 70 and 72 are coupled to the front and rear of the plate 62 of the first pellet 60, and the first and second idler pulleys to the first and second shafts 70 and 72. (74, 76) is coupled, the chain 80 is wound around the first, second idle pulley (74, 76), the chain 80 is fixed to the fixed sprocket is installed on the above-mentioned fixing rail 35 It is comprised so that it may engage with the tooth | gear 94 formed in the moving sprocket 92 with which the 50 and the 2nd pellet 90 are provided. The chain 80 is rotated in engagement with the teeth 52 formed on the fixed sprocket 50 of the fixed rail 35 in accordance with the movement of the first pellet 60, and at the same time the second pellet ( It is engaged with the teeth 94 formed in the mobile sprocket 92 of the 90 to move the mobile sprocket 92, through which the second pellet 90 is coupled to the mobile sprocket 92, After the movement will be made.

That is, the present invention is configured to move the first pellets 60 and 90 by the power of the motor 44 and to move the second pellet 90 separately through the chain 70 again. The pellet 90 does not move at the same speed with the movement of the first pellet 60, but also adds up to the rotational movement of the chain 80 before and after at a speed faster than the movement speed of the first pellet 60. You will be able to move. Particularly, in the present invention, when the second pellet 90 is moved, the power of the second pellet 90 is increased by the gear backlash when the power is transmitted through the gear engagement structure as in the prior art, whereas the chain ( As configured to move through the 80) it is possible to implement the effect of moving and stopping the second pellet 90 to the correct position without play.

The second pellet 90 is to supply or withdraw the workpiece placed on the upper portion to the machining center 200, and moves in conjunction with the movement of the first pellet 60, the first pellet 60 It is connected to the chain 80 to interlock with, and move forward and backward at a speed faster than the moving speed of the first pellet 60, the workpiece 10 is quickly supplied and withdrawn to the machining center 200.

That is, a mobile sprocket 92 having a rod shape and a tooth 94 formed on a bottom surface of the second pellet 90 is mounted, and the teeth 94 of the mobile sprocket 92 are formed. When the chain 80 rotates in a state of being bitten by the chain 80 wound around the first and second idler rollers 74 and 76 of the first pellet 60 described above, the second pellet moves together with the second pellet. In this case, the second pellet (90) moves at a constant speed together with the first pellets (60) by the power of the motor (44). By being added, it is possible to move forward and backward at a speed faster than the moving speed of the first pellet 60.

On both sides of the second pellet 90, a plurality of second rollers 96 are provided at a predetermined interval apart, and the second rollers 96 are provided on both sides of the first pellets 60 ( In the state inserted into the second guide groove (68) of the 64 to guide the movement before and after the second pellet 90 is made to be stable.

Meanwhile, in the exemplary embodiment of the present invention, only one supply unit 42 is installed in the elevating unit 24, but is representatively described. This is to allow each supply unit 42 to supply the workpiece 1 more quickly by alternately supplying the workpiece to the machining center 200 alternately. That is, when a plurality of supply units 42 are provided, two workpieces 1 may be moved simultaneously. Accordingly, when one workpiece 1 is processed at the machining center 200, the workpiece 1 is taken out. At the same time, the other work 1 can be immediately supplied to the machining center 200, so that the work 1 can be more quickly supplied and taken out.

Hereinafter, the operation of the workpiece exchanger of the machining center of the present invention configured as described above will be described with reference to FIGS. 1 to 8.

First, when a workpiece before processing is placed on the supply unit 42 provided in the automatic workpiece exchanger, the automatic workpiece changer rides on the rails 20 in front of the machining center 200 according to the operation of the mobile unit 12. Will be moved to.

Thereafter, the lifting unit 24 installed in the automatic workpiece exchanger is operated to raise and lower the supply unit 42 on which the work 1 is placed.

That is, as shown in FIG. 4, when power is applied to the motor 26, which is the driving source of the elevating unit 24, the drive shaft 28 rotates counterclockwise, and at the same time, the drive shaft 28 is connected to the drive shaft 28. The chain 36 is wound up. At this time, the end of the chain 36 is lifted up and down the lifting shaft 32 in the process of being wound by being fixed to the upper plate (10a) of the base 10 with a fixing pin 40, and thus lifting shaft 32 The lifting frame 34 which is installed through this, and the supply unit 42, which is placed on the lifting frame 34 and on which the work 1 is placed, are raised and lowered by a predetermined height upward.

Thereafter, after the supply unit 42 is elevated upward through the above process, the motor 44, which is the driving source of the supply unit 42, is operated to supply the workpiece 1 to the machining center 200.

That is, as shown in FIG. 8, when the power of the motor 44 is applied, the pinion 46 coupled to the shaft of the motor 44 rotates, and at the same time, one side of the first pellet 60. The rack 61, which is installed at the lower end and engaged with the pinion 46, moves linearly and moves the first pellet 60 toward the machining center 200.

In addition, when the first pellets 60 are moved, the second pellets 90, which are placed on the first pellets 60 and on which the workpieces 1 are placed, also move in conjunction with each other, and the workpiece 1 is moved to the machining center 200. Will be fed into. At this time, the second pellet 90 performs the front and rear movement operation at a speed faster than the movement speed of the first pellet 60 through the chain 80. That is, the chain 80 wound around the idle rollers 74 and 76 of the first pellets 60 is formed in the fixed sprocket 50 of the fixed rail 35 in accordance with the movement of the first pellets 60. And the moving sprocket 92 by rotating the moving sprocket 92 while being engaged with the teeth 94 formed in the moving sprocket 92 of the second pellet 90 at the same time. The second pellet 90 to which the 92 is coupled is moved forward and backward. Through this operation, the second pellet 90 is moved by the chain 80 in addition to the moving speed of the first pellet 60. By adding up to the moving speed, it is possible to move forward and backward at a speed faster than the moving speed of the first pellet 60. In particular, in the present invention, when the second pellet 90 is moved, when the power is transmitted through the gear engagement structure as in the prior art, there is a lot of play of the second pellet 90 by the gear backlash, so that the movement through the chain According to the configuration, the second pellet 90 can be moved and stopped to an accurate position without play, thereby enabling a more precise and stable operation.

Subsequently, when a workpiece is supplied onto a machining tool in the machining center 200 according to the operation of the supply unit, the first and second pellets 50 and 54, which are the supply unit 42, are machined according to the reverse rotation of the motor 44. After quickly exiting the center 200 and waiting while the work is completed, the finished work is withdrawn from the machining center 200 by the power of the motor 44.

12: moving unit 20: rail
24: lifting unit 32: lifting shaft
34: lifting frame 35: fixed rail
42: supply unit 44: motor
50: fixed sprocket 60: first pellet
80: chain 90: second pellet
92: feed sprocket 100: automatic workpiece changer
200: machining center

Claims (1)

An elevating unit 24 having a base 10 for reciprocating left and right on the rail 20, an elevating frame 34 installed on the base 10 and elevating with the power of the motor 26, and In the workpiece automatic exchange device of the machining center installed on the lifting frame 34, including a supply unit 42 for supplying and withdrawing the workpiece to the machining center 200,
The supply unit 42 is;
A fixed rail 35 fixedly installed on the elevating frame 34 and having a motor 44 installed at a bottom thereof, and a pinion 46 rotating at a power of the motor 44 on an upper surface thereof;
The first rail 60 which is mounted on the fixed rail 35 and engaged with the pinion 46 at the lower end thereof is reciprocated before and after receiving power from the motor 44. ;
It is mounted on the first pellet 60 and includes a second pellet 90 for moving back and forth with the first pellet 60 and supplying and withdrawing the workpiece 1 to the machining center 200, ;
A fixed sprocket 50 is installed on an upper surface of the fixed rail 35, and a moving sprocket 92 is installed on a lower surface of the second pellet 90;
First and second idle rollers (74, 76) are provided before and after the first pellet (60), and the chains (80) are wound around the first and second idle rollers (74, 76);
The chain 80 is rotated according to the movement of the first pellet 60 in a state of being bitten by the fixed and movable sprockets 50 and 92 and the second pellet having the movable sprocket 92 installed therein ( And 90) to move the second pellet (90) at a speed faster than the moving speed of the first pellet (50).

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