KR200186354Y1 - Chucking orifice open/closing device for Aato chuck changer - Google Patents

Abstract

The present invention relates to a chucking flow opening and closing device of an automatic chuck exchange device for automatically opening and closing the pneumatic flow path for the workpiece chucking according to the seating state of the chuck in the automatic exchange of the workpiece to be processed on the CNC lathe and the finished workpiece.

Accordingly, the configuration of the present invention, and the changer body for fixing so that the spindle device vertically placed on the processing area and the chuck base of the non-processing area to be located on the same horizontal line; A chuck exchanger which is axially coupled to the change body at the center of the processing region and the non-processing region so as to be rotated for a predetermined period to move the chuck of the finished workpiece to the chuck base, and to move the chuck of the workpiece to be processed toward the spindle device; Table up / down means fixed to the changer body and configured to move the chuck exchange means in a vertical direction by a hydraulic actuation force; A power generation and transmission means configured to connect the changer body and the chuck exchange means, converting the linear motion by the hydraulic actuation force into a rotary motion to rotate the chuck exchange means 180 °; And a coupling coupling between the spindle device and the chuck of the machining area, during the selective operation of the drawbar of the spindle device to clamp or unclamp the chuck while the air pressure supplied from the rear of the spindle device flows into the chuck. Chuck clamp means; In the chuck exchange apparatus of the CNC lathe comprising a, the chucking passage opening and closing means for opening and closing the chucking passage according to the clamping or unclamping state of the chuck the air pressure flowing into the chuck on the chucking passage further configured.

Description

Chucking orifice open / closing device for Aato chuck changer}

The present invention relates to an automatic chuck changer of a CNC lathe, and more particularly, in the automatic exchange of the workpiece to be processed on the CNC lathe and the finished workpiece, the pneumatic flow path for the workpiece chucking is automatically opened and closed according to the seating state of the chuck. It relates to a chucking flow path opening and closing device of an automatic chuck changer.

In order to process a workpiece in a general CNC lathe, as shown in FIG. 1, the chuck 120 should be directly fixed to the spindle 100 with the bolt 110, and in the case of exchanging the workpiece, the machined workpiece is fixed to the chuck 120. After removing from), the process has to go through the process of clamping by moving to the position of the chuck 120 for shape processing of the workpiece to be processed. Not only did it cause a great deal of productivity, but also when processing a workpiece with a different shape, there was an inconvenience of replacing the chuck 120 by replacing the fixing bolt 110 or machining it in another dedicated equipment.

130, which is not shown in the drawing, is a drawby, 140 is a hydraulic cylinder, and 150 is a workpiece.

The present invention was devised to solve the above problems, and its purpose is to automatically exchange the workpiece to be processed on the CNC lathe and the finished workpiece to minimize the non-working time, and to replace the chuck or additional equipment. In the automatic chuck changer of the CNC lathe that allows simultaneous machining of workpieces with different shapes simultaneously on a single lathe, the chucking flow opening / closing device of the automatic chuck changer allows the pneumatic flow path for the workpiece chucking to be automatically opened and closed according to the seating state of the chuck. In providing.

In order to achieve the above object, the present invention includes a changer body for fixing the spindle device vertically placed on the processing area and the chuck base of the non-processing area to be positioned on the same horizontal line; A chuck exchanger which is axially coupled to the change body at the center of the division between the machining area and the unprocessed area so as to rotate the chuck of the finished workpiece to the chuck base and to move the chuck of the workpiece to be processed toward the spindle device; Table up / down means fixed to the changer body and configured to move the chuck exchange means in a vertical direction by a hydraulic actuation force; A power generation and transmission means configured to connect the changer body and the chuck exchange means, converting the linear motion by the hydraulic actuation force into a rotary motion to rotate the chuck exchange means 180 °; And a coupling coupling between the spindle device and the chuck of the machining area, during the selective operation of the drawbar of the spindle device to clamp or unclamp the chuck while the air pressure supplied from the rear of the spindle device flows into the chuck. Chuck clamp means; In the CNC lathe chuck exchange device configured to include,

The chucking passage opening and closing means for opening and closing the chucking passage according to the clamping or unclamping state of the chuck the air pressure flowing into the chuck on the chucking passage further has a feature.

1 is a side cross-sectional view showing a main axis of a conventional CNC (numeric control) lathe.

Figure 2 is a plan view showing an automatic chuck changer of the CNC lathe according to the present invention.

Figure 3 is a front view showing an automatic chuck exchange device of the CNC lathe according to the present invention.

4 is a cross-sectional view taken along the line A-A of FIG.

5 is a cross-sectional view taken along the line B-B in FIG.

6 is an enlarged view illustrating main parts of FIG. 4.

FIG. 7 is an enlarged view illustrating main parts of FIG. 6, (a) shows a state in which the chucking flow path is opened, and (b) shows a state in which the chucking flow path is closed.

<Explanation of symbols for main parts of the drawings>

53: clamp block, 56: chucking euro,

70: opening and closing means of the chucking flow passage, 71: valve installation hole,

72: valve housing, 72a: locking jaw,

73a, 73b: upper and lower communication grooves, 74: chuck valve,

74a: hollow inner portion, 74b: protrusion,

75: flow path switching groove, 76: elastic spring,

77: branching euros,

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

Figure 2 is a plan view showing an automatic chuck changer of the CNC lathe according to the present invention, Figure 3 is a front view showing an automatic chuck changer of the CNC lathe according to the present invention, Figure 4 is a line A-A of Figure 2 5 is a cross-sectional view taken along the line B-B of FIG. 3, FIG. 6 is an enlarged view of the main portion of FIG. 4, and FIG. 7 is an enlarged view of the main portion of FIG. 6 (a) with the chucking flow path opened. (B) is a view showing a state in which the chucking flow path is closed.

The constitution of the present invention constitutes a changer body 10 which fixes the spindle device 1 vertically placed on the processing area Ta and the chuck base 12 of the non-processing area T to be positioned on the same horizontal line. do.

In addition, the chuck Wa of the finished workpiece is axially coupled to the changer body 10 of the division center of the machining area Ta and the non-processing area T so as to rotate. It constitutes a chuck exchange means 20 for moving the chuck W of the workpiece toward the spindle device 1 side.

In addition, it is fixed to the changer body 10 and constitutes a table up / down means 30 which moves the chuck exchange means 20 in the vertical direction by a hydraulic actuation force.

In addition, as a configuration of the coupling of the changer body 10 and the chuck exchange means 20, the power generating means for converting the linear movement by the hydraulic actuation force to the rotary movement to rotate the chuck exchange means 20 180 ° And a delivery means 40.

Clamping or unclamping of the chuck Ca during the selective operation of the drawbar 4 of the spindle device 1 by the coupling between the spindle device 1 and the chuck Ca of the machining area Ta. To constitute a chuck clamping means (50).

Meanwhile, the changer body 10 according to the present invention is manufactured and configured to be included in both the machining area Ta and the non-processing area T of the machine, while the spindle included in the spindle device 1 is included in the machining area Ta. The body 2 is fixedly installed perpendicular to the changer body 10, and inside the changer body 10 a hollow spindle shaft 3 is supported by a bearing, and also inside the hollow of the spindle shaft 3. A drawbar 4 is provided at the rear end, and at the rear end of the spindle shaft 3, a hydraulic rotary cylinder 5 for generating a constant linear stroke of the drawbar 4 in the vertical direction is provided. In addition, the spindle shaft 3 is shaft-coupled with a pulley 6 which is belt-coupled with a servomotor (not shown) to receive power.

Meanwhile, the chuck exchange means 20 of the present invention is a chuck in which the chuck seating holes 21 are symmetrically formed to guide the chuck C of the non-processing area T and the chuck C of the processing area Ta. The change table 22 and the rotating shaft 24 axially coupled orthogonally to the chuck change table 22 are comprised.

On the other hand, the table up / down means 30 is a cylinder tube 31 which is fixed to the inner side and the outer side of the changer body 10, and is installed inside the tube 31 and at the same time rotates the rotating shaft 24 in the vertical direction And a piston (32) supported by a bearing (35) to be liftable, the piston guide pin being positioned on the opposite side of the cylinder tube (31) and the piston (32) for positioning of the piston (32). 33 and the guide hole 34 are formed. In addition, the piston 32, which is a non-rotating body, is coupled to the bearing 35 to support the rotating shaft 24 that is the rotating body. In addition, a dog 36 is installed at the outer end of the piston 32 and a sensing switch 37 for detecting the movement of the dog 36 at a predetermined vertical interval close to the dog 36 is composed of a pair of 2EA.

Meanwhile, the power generating means and the transmission means 40 are hydraulic cylinders 41a and 41b fixedly installed at both sides of the changer body 10 in a direction orthogonal to the rotation shaft 24, and the hydraulic cylinders 41a and 41b. And a pinion 43 axially coupled to the rotary shaft 24 and engaged with the piston rack 42 so as to generate a predetermined stroke that is reversed / reversed thereto.

In addition, the stopper block 44 is axially coupled to the rotation shaft 24 to determine the rotation range (180 °) of the chuck exchange means 20 in the lower portion of the power generation and transmission means 40, the opposite The changer body 10 is configured with a stopper 45 fixed side by side.

On the other hand, the chuck clamp means 50 is a spherical jaw 52 fixed to the end of the draw bar (4) by the fixing bolt 51 and the spindle shaft (3) is fixed to the chuck (Ca) The jaw (54) for clamping the clamp is pivotally coupled to the clamp block (53) and the clamp block (53) configured to slide so that one end of the jaw (54) and the other end of the spherical jaw (52) are caught. An interlocking relationship is established during vertical movement of the bar 4, and includes a clamp link 55 for clamping / unclamping the chuck Ca.

In addition, the clamp block 53 has a chuck in which the air pressure flowing from the rear of the spindle device 1 is chucked in the machining area Ta through the hollow portion 7 between the drawbar 4 and the spindle shaft 3. A chucking flow path 56 is formed to extend to Ca and clamp the work Wa.

On the other hand, in the clamp block 53 connected to communicate with the chucking flow path 56 to open and close the chucking flow path 56 for chucking to the chuck (Ca) according to the seating state of the chuck (Ca) of the processing area (Ta). The chucking flow path opening and closing means 70 is provided.

The chucking flow path opening and closing means 70 according to the present invention communicates with the chucking flow path 56 as shown in FIGS. 6 and 7, and when the chuck Ca is seated with the clamp block 53, the chuck Ca is inside. The valve installation hole 71 is formed at the position opposite the chuck of the clamp block 53 so that the air pressure flows into the furnace.

More specifically, the valve installation hole 71 is fixedly installed with a valve housing 72 having a predetermined inner diameter, and a hollow inner core portion 74a having a sliding material at an inner diameter and having upper and lower portions penetrated therein is formed therein. A chuck valve 74 having a protrusion 74b is provided to cause interference due to the mounting of the chuck Ca so as to be movable downward, and the chuck valve 74 is vertical to the hollow inner core 74a. An elastic spring 76 to which upward force is applied is interposed.

In addition, a locking jaw 72a is formed at an inner upper end of the valve housing 72 to control upward sliding above a set, and a chuck valve 74 that slides above and below a lower end of the locking jaw 72a. The upper communication groove 73a and the lower communication groove 73b which are not interviewed are formed, while the chucking flow path 56 of the clamp block 53 is formed to penetrate the sliding outer diameter of the valve housing 72 and the upper communication groove ( In the range of 73a), it is penetrated so as to communicate with the branching flow path 77 which is newly branched further toward the chuck 73a.

In addition, in the outer diameter of the chuck valve 74, a flow path switching groove 75 which is not interviewed at the time of sliding is formed at a predetermined interval between the sliding sections. The communication relationship between the upper and lower communication grooves 73a and 73b of the valve housing 72 and the flow path switching groove 75 of the chuck valve 74 is such that the chuck valve 74 is secured by the seat of the chuck Ca. In the case of downward movement, as shown in FIG. 7A, the chucking flow path 56 and the lower communication groove 73b communicate with each other, and the air pressure flows into the chuck Ca through the hollow inner core portion 74a. When the chuck valve 74 is caught up by the locking jaw 72a of the valve housing 72 and moved upward by the return force of the elastic spring 76 due to the detachment of the chuck Ca, (b) of FIG. As in the flow path switching groove 75 is in communication with the upper communication groove (73a) is a structure for switching so that the air pressure is discharged to the branch flow path (77) without passing through the hollow inner core portion (74a).

The formation of the branch flow path 77 is such that chips or cutting oil generated during machining of the workpiece when the chuck Ca for exchanging the workpiece and the workpiece to be machined fall into the chuck valve 74 of the clamp block 53. To prevent this.

On the other hand, in the CNC lathe to which the present invention is applied, since the processing area Ta and the non-processing area T must be isolated, the area is divided into the cover 60 as shown in FIGS. 2 and 3. In addition, since the chuck change table 22 is a rotating body, the changer door 62 having the same size as the rotation radius of the chuck change table 22 is installed so that the chuck change table 22 does not interfere with the cover 60 that is fixed during the turning operation. 22) was configured to rotate in conjunction with.

Referring to the operation of the present invention configured as described above are as follows.

During the machining of the workpiece Wa chucked to the chuck Ca in the clamp block 53 on the machining region Ta, the operator places the workpiece W to be machined on the chuck base 12. Chuck to the chuck (C).

After the work of the workpiece Wa is completed, the draw bar 4 of the spindle device 1 is moved downward by the operation of the hydraulic rotary cylinder 5 and at the same time, the fixing bolt ( The spherical jaw 52 fixed by 51 is also displaced downward in interlocking manner.

At this time, the jaw 54 is moved by the downward trajectory movement of the clamp link 55 which is engaged in the locking groove 52a of the spherical jaw 52 and the clamp groove 54a of the jaw 54, respectively. Unclamped.

After that, when the hydraulic oil flows into the cylinder tube 31 and pushes up the piston 32 upward, the rotary shaft 24 moves upward by the operating stroke of the piston 32, and at the same time, the valve installation hole of the clamp block 53 ( The chuck valve 74 of the chucking flow path opening / closing means 70 installed in the sliding motion 71 is removed by the separation of the chuck Ca by the separation of the chuck Ca as shown in FIG. By the elastic return force of 76, it is caught by the latching jaw 72a of the valve housing 73 and returned to its original position.

At this time, the flow path switching groove 75 of the chuck valve 74 is connected to the upper communication groove 73a of the valve housing 72 formed through the chucking flow passage 56 and the branch flow passage 77, and at the same time, the lower communication groove. The flow path connection to 73b is closed so that the air pressure is not supplied to the chuck Ca through the hollow inner portion 74a of the chuck valve 74 and is injected through the branch flow passage 77 so as to replace the chuck exchange means ( The operation of 20) prevents the processing chips, cutting oil, and the like from the processed workpiece from falling into the hollow inner core portion 74a of the chuck valve 74.

Subsequently, interference with the chuck base 12 and the clamp block 53 does not occur while the chucks Ca and C of the machining area Ta and the unprocessed area T are seated in the chuck seating hole 21. The hydraulic cylinders 41a and 41b fixedly installed at both sides of the changer body 10 in the lifted state are operated.

When the hydraulic oil flows into the hydraulic cylinder 41a, the piston rack 42 rotates the pinion 43 axially coupled to the rotary shaft 24 while being pushed by the hydraulic force.

The rotational stroke of the piston rack 42 is set by the rotational limit section of the stopper block 44 and the stopper 45 installed on the rotation shaft 24 and the changer body 10 at a position opposite thereto, and thus the chuck change means ( While the chuck change table 22 of the 20 is pivoted 180 ° with the change door 62, the area position of the chuck Ca (c) mounted on the chuck seating hole 21 of the chuck change table 22 is completely. Is changed. (In the attached drawing, the chuck change operation is not performed.)

When the chuck change table 22 reaches the turning limit point 180 °, the hydraulic oil flowing into the hydraulic cylinders 41a and 41b is interrupted to stop the operation of the piston rack 42, and the shaft is coupled to the rotary shaft 24. Rotation of the chuck change table 22 is interrupted by a stopper 45 fixed to the stopper block 44 and the changer body 10.

At this time, the piston as the hydraulic oil in the opposite direction to the upward movement into the cylinder tube 31 of the lower side on which the chuck change means 20 including the chuck change table 22 and the rotary shaft 24 is lifted is introduced. At the same time as the lowering of the 32, the chuck exchange means 20 interlocked with the lowering chuck lowers and changes its position, that is, the chuck C mounted on the workpiece W to be processed is the spindle device 1. With the clamp block 53, the finished workpiece Wa is seated on the chuck base 12 of the unprocessed region T.

Meanwhile, as shown in FIG. 7A, the chuck C mounted on the workpiece W to be processed is mounted to the clamp block 53, and the chuck valve protruding outward from the chuck C When the protrusions 74b of 74 interfere with each other, the chuck valve 74 carried by the elastic spring 76 moves downward by a predetermined distance to switch the air pressure of the chucking flow path 56. That is, the flow path switching groove 75 of the chuck valve 74 closes the communication relationship with the upper communication groove 73a of the valve housing 72 by the downward movement of the valve, and opens with the lower communication groove 73b. Therefore, the air pressure supplied from the chucking flow path 56 is introduced into the chuck C through the hollow inner core portion 74a to chuck the workpiece.

The chuck C chucking the workpiece W to be machined moved to the machining area Ta is then seated with the clamp block 53 and installed at the rear end of the spindle shaft 3. When the draw bar 4 is moved upward, the clamp link 55 is rotated about the pivot point by the spherical jaw 52 installed at the end of the draw bar 4, and the upper part of the clamp block 53 is rotated. The configured jaw 54 is opened outward and clamped to the chuck C.

After that, the spindle shaft 3 rotates to process the workpiece W by the driving force of the servomotor (not shown), while the worker Ta Just replace the workpiece (W) to be processed.

The device of the present invention is repeatedly performed by the above operation.

By applying the present invention as described above, it is possible to prepare the workpiece to be processed next in advance during the machining of the workpiece, so that it is possible to reduce the unworking time such as replacing the chuck or replacing the workpiece. Since the chuck can be automatically exchanged with the workpiece, it is possible not only to carry out multi-processing with one piece of equipment, but also to add the chucking flow opening and closing means so that the chip or cutting oil on the workpiece or chuck during the unclamping operation of the chuck is clamped. It can be expected to have various effects to improve the reliability of the machine operation by preventing it from penetrating into the machine.

Claims (2)

A changer body 10 for fixing the spindle device 1 vertically placed on the processing area Ta and the chuck base 12 of the non-processing area T to be positioned on the same horizontal line; The chuck (Ca) of the finished work (Wa) is axially coupled to the change body (10) of the division center of the machining area (Ta) and the non-working area (T) by a predetermined interval to be processed into the chuck base (12). Chuck exchange means (20) for moving the chuck (C) of the workpiece (W) to the spindle device (1); A table up / down means (30) fixedly mounted to the changer body (10) to move the chuck exchange means (20) in a vertical direction by a hydraulic actuation force; As a configuration of the coupling between the changer body 10 and the chuck exchange means 20, power generation and transmission means for turning the chuck exchange means 20 by 180 degrees by converting a linear movement by a hydraulic actuation force into a rotary movement. 40; And the coupling arrangement between the spindle device 1 and the chuck Ca of the machining area Ta, thereby clamping or unfastening the chuck Ca during the selective operation of the drawbar 4 of the spindle device 1. Chuck clamp means (50) having a chucking flow path (56) for clamping and air pressure supplied from the rear of the spindle device (1) flows into the chuck (Ca); In the CNC lathe chuck exchange device configured to include, Further comprising a chucking flow path opening and closing means 70 for opening and closing the chucking flow path 56 according to the clamping or unclamping state of the chuck (Ca) on the air pressure flowing into the chuck (Ca) on the chucking flow path (56). Chucking flow path opening and closing device of the automatic chuck exchanger characterized in that. According to claim 1, The chucking flow path opening and closing means 70, A valve mounting hole 71 is formed in communication with the chucking flow path 56 and in the clamp block at the position opposite the chuck; The valve installation hole 71 has a sliding surface section having a predetermined inner diameter, and upper and lower communication grooves 73a and 73b of a non-sliding inner diameter larger than the inner diameter of the sliding surface are respectively formed in the upper and lower portions of the section. A non-sliding inner diameter of the valve housing 72 in which the chucking flow passage 56 and the communication structure are formed is fixedly installed; A hollow inner core portion 74a which is slidably coupled to the valve housing 72 and has an upper and a lower portion penetrated therein is formed, and the outer protrusion 74b is formed to be protruded at a predetermined vertical distance by the interference of the chuck Ca. A chuck valve (74) having a flow path switching groove (75) which is non-sliding between the sliding surfaces with the valve housing (72) is provided; The hollow inner core 74a of the chuck valve 74 is interposed with an elastic spring 76 which always pushes the chuck valve 74 upward; The chucking flow path opening and closing device of the automatic chuck changer, characterized in that the upper communication groove (73a) of the valve housing 72 forms a branch flow path (77) penetrating close to the protrusion (74b).