KR200379619Y1 - device of transfer work for numerical control - Google Patents

Abstract

 The present invention is a workpiece conveying apparatus for conveying a workpiece to a plurality of general-purpose NC machine tools arranged in a line on a machining line, the clamp for clamping the workpiece with the first, second grippers operated by the power of the first cylinder At least one clamping device including a unit, a lifting unit installed at a lower end of the clamp unit and lifting and lowering by the power of a second cylinder and raising and lowering the clamp unit, and supporting the clamping devices while driving the clamping device. The present invention proposes a workpiece conveying apparatus of a general-purpose NC machine tool, comprising a TR bar reciprocating by a predetermined pitch in a forward and backward direction by a power and reciprocating the clamping devices before and after.

Description

Device transfer device of general purpose machine tool {device of transfer work for numerical control}

The present invention relates to a workpiece transfer device for transferring a workpiece to a plurality of general-purpose NC machine tools arranged in a line on one machining line, in particular to be sequentially transferred to each individual general-purpose NC machine tools are processed step by step The present invention relates to a workpiece feeding and discharging device of a general-purpose NC machine tool, which allows the workpiece to be conveyed more stably and efficiently.

As is well known, NC (numerical control) machine tools (NC lathes or MCTs) are cutting machines for freely machining a workpiece by input data while the workpiece is held on the chuck. The configuration of the spindle motor The spindle is interlocked with the high speed rotation of the spindle and the spindle unit is provided with a chuck or jig that can clamp the workpiece or tool on the shaft. It is common to install several NC machine tools on one line according to the machining part. That is, the NC machine tool having such a configuration has many advantages other than the conventional handle operating machine tool with high precision and easy processing of complex curved workpieces.

On the other hand, in front of the NC machine tools 10a, 10b, ... arranged in a line as described above for automatically supplying and discharging the workpieces to the respective NC machine tools (10a, 10b, ...) Bar is provided with a workpiece feeder 300, the general configuration of the workpiece feeder 300 of the NC machine tool of such NC machine tools will be briefly described with reference to FIG.

As shown in FIG. 1, the workpiece conveying apparatus 300 reciprocates by a predetermined pitch before and after the power of the driving unit 200, and is connected to the rod 250 of the cylinder 240 and the link 230 to increase and decrease. The operating bar (or T / R BAR) 210 which is lowered and the operating bar 210 are installed on the operating bar 210 and the workpiece D according to the lifting and lowering operation of each NC machine tool 10a, 10b, ...) supplied to the chuck and according to the movement of the operation bar 210 before and after clamping the workpiece supplied to the chuck or the jig NC machine tools (10a, 10b, ... are largely composed of clamps 220 to be conveyed.

However, since the lifting, lowering, and before and after conveyance of the clamp 220 are made only by the operation of the operation bar 210 as described above, the deformation of the operation bar 210 is not satisfactory in the process of use and the operation bar 210 sags downward. There is a possibility that the operation bar 210 for raising and lowering the clamp 220 is operated by the operation of the link 250 connected to the rod 250 of the cylinder 240, the length of the T / R BAR Long and heavy, there was a problem that the operation is not stable and the loading time of the workpiece may be delayed.

Therefore, the present invention for solving the above problems is to install a clamping device consisting of a clamp unit for clamping the workpiece on the TR bar reciprocating before and after, and a lifting unit for lifting up and down the clamp unit, the transfer of the workpiece is more It is to provide a workpiece supply and discharge device of a general-purpose NC machine tool that can be made stable and simple.

Another object of the present invention is to provide a workpiece supply and discharge device of a general-purpose NC machine tool that can prevent the deformation of the TR bar by the TR bar is responsible for the front and rear movement of the clamping device.

Another object of the present invention is to provide a workpiece supply and discharge device of a general-purpose NC machine tool to reduce the loading time according to the transfer of the workpiece.

The present invention for achieving the above object is a workpiece transfer apparatus for transferring a workpiece to a plurality of general-purpose NC machine tools arranged in a line on one machining line, the first, which operates by the power of the first cylinder, At least one clamping device comprising a clamp unit for clamping a workpiece with two grippers, and a lifting unit installed at a lower end of the clamp unit and lifting and lowering by a power of a second cylinder, and lifting and lowering the clamp unit; And a TR bar that supports the clamping devices and reciprocates by a predetermined pitch in the front and rear directions by the power of a driving unit and reciprocates the clamping devices before and after.

Hereinafter, a detailed description of a preferred embodiment of the present invention will be described with reference to the accompanying drawings. In the present invention, a clamp unit for clamping a workpiece and a lifting unit for lifting and lowering the first and second grippers to transfer the workpiece to a plurality of general-purpose NC machine tools arranged in one line on a machining line. At least one clamping device and a TR bar for reciprocating the clamping devices by a predetermined pitch in the forward and backward directions to provide a more stable and convenient supply and discharge of the workpiece into each individual general NC machine tool, TR It is possible to minimize the deformation of the TR bar such as bending by allowing the bar to operate only forwards and backwards rather than up and down, and to shorten the loading time according to the supply and discharge of the workpiece. Make a point. General-purpose NC machine tool is a general term for machine tools such as NC lathes and MCTs.

2 and 3 are diagrams schematically showing the entire machining line in which the general-purpose NC machine tools are installed according to the present invention, and the workpiece D supplied from the workpiece supply device 5 as shown in the figures. Is moved in the direction of the arrow (→) in the drawing through the workpiece feeder (A) of the present invention, and is sequentially processed into each individual general NC machine tool (10a, 10b, 10c .....) and processed step by step. It is made into a finished product.

4 is a view showing the configuration of the workpiece transport device (A) according to the first embodiment of the present invention by cutting away from the side. Referring to FIG. 4, the workpiece transport apparatus A includes a clamp unit 22 that clamps the workpiece D largely and a lower end of the clamp unit 22 and the first and second clamp units 22. A clamping device 20 composed of lifting units 44 for lifting and lowering the grippers 40 and 42, and supporting the plurality of clamping devices 20 to move the clamping device 20 left and right. Consists of a TR bar 62 (Transfer BAR) (or referred to as an operation bar, hereinafter referred to as a "TR bar"), the details of these configurations will be described below.

5 and 6 are views showing the detailed configuration of the clamp unit 22. As illustrated in FIGS. 5 and 6, the clamping unit 22 has a housing 23, and a rod 26 penetrates and is installed horizontally in the housing 23, and the rod 26 has the above-described TR. In accordance with the operation of the first cylinder 24 located close to one end of the bar 62, the horizontal movement in the forward and backward directions. In addition, the first and second rotation shafts 36 and 38 are vertically penetrated on both sides of the housing 23, respectively, and the first and second rotation shafts 36 and 38 are provided with the rod 26 and the rack. The pinions are connected to each other and rotated according to the horizontal movement of the rod 26. That is, the first and second rack gears 28 and 30 are respectively formed on one side front and the other rear surface of the rod 26 located in the housing 23, and the first rack gear 28 is formed at the first time. The first pinion 32 coupled to the coaxial 36 is engaged, and the second pinion 34 coupled to the second pivot 38 is engaged with the second rack gear 30. The first and second pivot shafts 36 and 38 can rotate by the horizontal movement of the rod 26. Here, the first and second rack gears 28 and 30 are formed on the front and rear surfaces of the rod 26 in opposite directions, respectively, and the first and second rack gears 28 and 30 and the first and second pinion 32 are respectively formed. The first and second rotation shafts 36 and 38 meshed with each other are rotated in opposite directions (forward and reverse rotation) when the rod 26 is operated.

Meanwhile, first and second grippers 40 and 42 are coupled to front ends of the first and second rotation shafts 36 and 38, respectively, and the first and second grippers 40 and 42 are connected to the first and second grippers 40 and 42, respectively. According to the rotation of the rotation shaft (36, 38) to perform the function of clamping the workpiece (D).

7 is a view showing a detailed configuration of the lifting unit 44 for lifting and lowering the clamp unit 22, preferably the first and second grippers 40, 42 configured as described above.

Referring to FIG. 7, the lifting unit 44 has a housing 45 installed at a lower end of the clamp unit 22 mentioned above, and a rod 48 is horizontally installed through the housing 45. The rod 48 is horizontally moved forward and backward in accordance with the operation of the second cylinder 46 installed at the end of the TR bar 62 described above. The rod 48 has a rack gear 50 formed therein, the rack gear 50 is engaged with the first pinion 52 of the shaft 54 which is horizontally in the housing 45, The shaft 54 rotates forward and backward as the rod 48 moves forward and backward. In addition, a second pinion 56 is integrally formed at the front end of the shaft 54, and the second pinion 56 is a rack gear of the elevating rod 60 which is vertically embedded in the housing 45. 58, and the lifting bar 60 is raised and lowered according to the forward and reverse rotation of the shaft 54, and raises and lowers all the components of the clamp unit 22 described above. That is, when the lifting bar 60 is raised and lowered, the housing 23 of the clamp unit 22 installed at the tip of the lifting bar 60 is raised and lowered, and thus is installed in the housing 23. The rod 26 and the first cylinder 24 for operating the rod 26, and the first and second pivot shafts 36 and 38 meshed with the rod 26 by racks and pinions. By doing so, the first and second grippers 49 and 42 clamping the workpiece also move up and down. The reason for raising and lowering the first and second grippers 40 and 42 as described above is to be installed in the general-purpose NC machine tool when the workpiece is transferred into the general-purpose NC machine tool according to the operation of the TR bar 62 to be described later. This is to prevent interference with the chuck or jigs.

Meanwhile, as illustrated in FIGS. 3 and 4, the clamp unit 22 and the lifting unit 44 having the above-described configurations include a TR bar reciprocating before and after a predetermined pitch by the power of the driving unit 64. A plurality of units are installed at predetermined intervals on the 62 so as to reciprocate forward and backward according to the operation of the TR bar 62.

Hereinafter, the operating state of the workpiece transfer device of the general-purpose NC machine tool of the present invention configured as described above will be described with reference to FIGS. 3 and 8A to 8E.

First of all, before describing the operation of the workpiece feeder 100, the following description is given of one step in which the workpiece D is transferred, that is, the workpiece D supplied through the workpiece feeder 5 for the first universal NC machine tool 10a. Only the process to be transported in) will be described representatively, and the process in which the workpiece (D) continues to be transferred step by step to other general-purpose NC machine tools (10b, 10c ...) is all done in the same way. Detailed description will be omitted.

First, when the work D is supplied through the work supply device 5 shown in FIG. 3, the clamp unit 22 corresponding to the clamp device 20 of the work feed device 100 is shown in FIG. 8A. To clamp the workpiece (D). That is, when the rod 26 is pulled in the right direction by the power of the first cylinder 24, the rod 26, the first and second rack gears 28 and 30, and the first and second pinions 32 and 34 are moved. The first and second rotation shafts 36 and 38 are connected to each other through rotation, and thus the first and second grippers 40 and 42 coupled to the front ends of the first and second rotation shafts 36 and 38 are rotated. It rotates and clamps the workpiece (D). When the workpiece D is clamped as described above, the lifting unit 44 operates as shown in FIG. 8B to lift the first and second grippers 44. In other words. When the rod 48 is pulled to the right by the power of the second cylinder 46, the shaft 54 connected to the rod 48, the rack 50, and the first pinion 52 rotates forward. At the same time, the elevating rod 60, which is connected to the front end of the shaft 54 and the second pinion 56 and the rack gear 58, is elevated as the shaft 54 rotates, and the first and second grippers 40 are lifted. By raising and lowering the plate 43 supporting the 42, the work piece D is to be elevated to a certain height.

As shown in FIG. 8C, when the work D is raised and lowered as described above, the TR bar 62 supporting the clamp device 20 moves by a predetermined pitch in the right direction by the power of the driving unit. The workpiece D clamped at 20 is transferred into the universal NC machine tool 10a and placed on the jig 1a of the universal NC machine tool 10a.

Thereafter, as shown in FIG. 8D, the lifting unit 44 of the clamp device 20 operates again to lower the first and second grippers 40 and 42, and thus the first and second grippers 40 and 42. The workpiece D, which is clamped on the blades, is lowered and placed in the chuck 1a of the general-purpose NC machine tool 10a. At the same time, as shown in FIG. 8E, the first and second grippers 40 and 42 unclamp the workpiece D according to the operation of the clamp unit 22, and thus the workpiece D may be a workpiece supply device ( 5) After being transferred into the general-purpose NC machine tool 10a, the first and second grippers 40 and 42 freeze the workpiece D while being bitten by the chuck 1a of the general-purpose NC machine tool 10a. Simultaneously with clamping, interference with the jig 1a does not occur and the workpiece is precisely processed.

Then, the TR bar 62 returns to the workpiece supply device 5 which is the initial position according to the movement of the left side.

Subsequently, the workpiece D processed as described above is sequentially moved to the next general-purpose NC machine tools 10b, 10c, ... by the continuous operation of the workpiece transfer device 100 of the present invention. It is processed into a finished product.

9 and 10 are views illustrating a second embodiment of the clamp unit 72 and the elevating unit 86, which are components of the clamping device 70, of the workpiece conveying apparatus of the general-purpose NC machine tool mentioned above. .

First, the clamp unit 72 has a structure of the first and second grippers 40 and 42 for clamping the work D as shown in FIGS. 9 and 10 and FIGS. 11 and 12. As in the example, the components for operating the first and second grippers 40 and 42 are different. That is, the clamp unit 72 has a housing 73, the rod 76 is horizontally installed through the housing 73, the rod 76 is at one end of the above-described TR bar 62 In accordance with the operation of the first cylinder 74 located in close proximity to the horizontal movement in the forward and backward directions. In addition, first and second pivotal shafts 82 and 84 are vertically penetrated on both sides of the housing 73, respectively, and the rods 76 and the first and second pivotal shafts 82 and 84 are respectively installed. It is connected to the two links (78, 80) is rotated in accordance with the horizontal movement of the rod (76). That is, one end of the first and second links 78 and 80 is fastened to the pins 76a and 80a, respectively, to the rod 76 located in the housing 73, and the first end of the first link 78 is connected to the rod 76. The first rotational shaft 82 is vertically coupled, and the other end of the second link 80 is coupled to the second rotational shaft 84 vertically, thus the first and second rotational shafts 82 and 84. ) Is forward and reverse rotation in accordance with the operation of the first and second links 78 and 80 pivoting around the pins 78a and 80a according to the horizontal movement of the rod 76. In this case, the first and second links 78 and 80 may be formed on the front and rear surfaces of the rod 26 in opposite directions, respectively, and the first and second links 78 and 80 may be coupled to the first and second links 78 and 80. In order to allow the two rotation shafts 82 and 84 to rotate in opposite directions (forward and reverse rotation) when the rod 76 is operated. First and second grippers 40 and 42 are coupled to the front ends of the first and second rotation shafts 82 and 84, respectively, and the first and second grippers 40 and 42 are the first and second times. According to the rotation of the coaxial (82, 84) to perform the function of clamping the workpiece (D).

Meanwhile, the lifting unit 86 has a housing 87 installed at the lower end of the clamp unit 72 mentioned above, as shown in FIGS. 9 and 10 and 13 and 14, and the housing 87. The rod 90 is installed horizontally through the rod 90, and the rod 90 moves horizontally in the forward and backward directions according to the operation of the second cylinder 88 installed at the end of the TR bar 62. . A rack gear 92 is formed in the rod 90, and the rack gear 92 meshes with the first pinion 92 of the shaft 94 horizontally installed in the housing 87. The shaft 94 rotates forward and backward as the rod 90 moves forward and backward. In addition, a second pinion 96 is integrally formed at the front end of the shaft 94, and the second pinion 96 is a rack gear 100 of a lift table 102 installed vertically in the housing 87. ) Is engaged. The platform 102 is attached to the bottom surface of the housing 73 of the clamp unit 72 described above and installed on both sides of the shaft 94 in accordance with a rotational motion of the shaft 94 (hereinafter, referred to as a linear motion block 104). LM block) to move up and down to raise and lower the entire components of the clamp unit 76. That is, when the platform 102 is lifted and lowered by the LM block 104, the housing 73 of the clamp unit 72 installed at the tip of the platform 102 is raised and lowered, and thus the housing The rod 76 installed in the 73 and the first cylinder 74 for operating the rod 76 and the first connected to the rod 76 and the first and second links 78, 80 The first and second grippers 40 and 42 clamping the work piece D also move up and down as the two pivot shafts 82 and 84 move up and down. The reason for raising and lowering the first and second grippers 40 and 42 as described above is to transfer the workpiece D into the general-purpose NC machine tool according to the operation of the TR bar 62 as in the first embodiment. In this case, to prevent interference with the chuck installed in the general-purpose NC machine tool.

That is, the clamping device 70 configured as described above is installed on the TR bar 62 as in the first embodiment described above, and the general purpose of the workpiece D in accordance with the movement of the TR bar 62 before and after Since the NC machine tools 10b, 10c, ... can be moved sequentially, detailed operation descriptions thereof will be omitted as described above.

As described above, the present invention installs a clamping device consisting of a clamp unit for clamping the workpiece on the TR bar reciprocating before and after, and a lifting unit for lifting and lowering the clamp unit, so that the transport of the workpiece is more stable and convenient. Has the effect that can be achieved. In addition, since the TR bar is only responsible for the front and rear movement of the clamping device, it has an effect of preventing deformation of the TR bar and a synergistic effect of shortening the loading time according to the movement of the workpiece.

1 is a view schematically showing the structure of a workpiece transport apparatus of a conventional dedicated NC machine tool.

Figure 2 is a schematic view showing a processing line installed with a plurality of general-purpose NC machine tools, and a workpiece transfer device installed in the NC machine tools according to the present invention.

3 is a front view of FIG. 2;

Figure 4 is a view showing a partially cut away in the configuration of the workpiece transport apparatus according to the present invention.

Figure 5 is a three-dimensional view showing the configuration of the clamping device constituting the configuration of the workpiece transport apparatus according to the first embodiment of the present invention.

Figure 6 is a view showing a part of the clamp unit of the clamping device of the clamping device shown in FIG.

7 is a view showing the configuration of the lifting unit of the clamp device that is the configuration of the workpiece transport device shown in FIG.

8a to 8e are views sequentially showing the operating state of the workpiece conveying apparatus of the general-purpose NC machine tool according to the present invention.

9 is a view schematically showing a clamping device constituting a workpiece transport apparatus according to a second embodiment of the present invention.

10 is a diagram three-dimensionally showing the configuration of the clamping device shown in FIG.

FIG. 11 is a view showing a partial cutaway view of the clamp unit, which is a configuration of the clamping device shown in FIG. 10;

12 is a view showing an operating state of the clamp unit shown in FIG.

FIG. 13 is a view showing a partial cutaway view of a configuration of a lifting unit, which is a configuration of the clamping device shown in FIG. 9;

14 is a side view showing the configuration and operation of the lifting unit shown in FIG.

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

10a, 10b, 10c, .....: general purpose NC machine tools

20: clamping device 22: clamp unit

24: first cylinder 26: rod

36: 1st coaxial 38: 2nd coaxial

40: first gripper 42: second gripper

44: lifting unit 46: the second cylinder

48: rod 54: shaft

60: lifting bar 62: TR bar

64: drive unit A: workpiece feeder

Claims (5)

In the workpiece transfer device for transferring the workpiece to a plurality of general-purpose NC machine tools arranged in one line, A clamp unit for clamping the workpiece with first and second grippers operated by the power of the first cylinder; At least one clamping device installed at a lower end of the clamp unit and configured to move up and down by the power of a second cylinder, and a lift unit configured to lift and lower the clamp unit; And a TR bar that supports the clamping devices and reciprocates by a predetermined pitch in the forward and backward directions by the power of a driving unit, and includes a TR bar that reciprocates the clamping devices before and after. The method of claim 1, wherein the clamp unit comprises a housing; A rod passing through the housing and horizontally moved by the operation of the first cylinder; First and second pivots which have first and second pinions engaged with the first and second rack gears respectively formed on the front and rear surfaces of the rod, and which rotate in the horizontal movement of the rod and rotate the first and second grippers. The workpiece feeder of the general-purpose NC machine tool, characterized in that consisting of. According to claim 1 or 2, wherein the lifting unit is a housing; A rod passing through the housing and horizontally moved by the operation of the second cylinder; A shaft rotating with a first pinion engaged with the rack gear formed on the rod; And a rack gear that engages with a second pinion coupled to the tip of the shaft, and comprises a lifting rod for lifting and lowering the clamp unit by the rotation of the shaft. The method of claim 1, wherein the clamp unit comprises a housing; A rod passing through the housing and horizontally moved by the operation of the first cylinder; First and second links pinned to the rods in opposite directions to rotate about the pins according to the operation of the rods; General purpose NC machining, which is installed through the end of the first and second links, respectively, and comprises first and second rotation shafts that rotate according to the rotation of the first and second links and rotate the first and second grippers. Workpiece feeder of the machine. According to claim 1 or 3, wherein the lifting unit is a housing; A rod passing through the housing and horizontally moved by the operation of the second cylinder; A shaft rotating with a first pinion engaged with the rack gear formed on the rod; It has a rack gear that is engaged with the second pinion coupled to the front end of the shaft and ascends and descends by riding the LM blocks installed on both sides by the rotation of the shaft, characterized in that consisting of a lifting platform for lifting and lowering the clamp unit Workpiece feeder of general purpose NC machine tool.