KR100656629B1 - auto chucking changer for CNC lathe - Google Patents

Abstract

The present invention automatically minimizes non-working time by automatically exchanging the workpiece to be processed on the CNC lathe and the finished workpiece, and simultaneously allows machining of workpieces of different shapes on one lathe without the need for chuck replacement or additional equipment. It relates to an automatic chuck changer of a lathe.

According to the present invention, in configuring a device for exchanging chucks in a CNC lathe, the spindle device 1 vertically placed on the machining area and the chuck base 12 of the non-working area are fixed to be positioned on the same horizontal line. A changer body 10; A chuck exchange means for moving the chuck of the finished workpiece to the chuck base and moving the chuck of the workpiece to be processed toward the spindle apparatus, the shaft center being installed so that the divided centers of the machining zone and the unprocessed zone are rotated; A table up-down means (30) fixed to the changer body and having a piston (32) bearing-supported to move the chuck exchange means in a vertical direction by a hydraulic actuation force and to lift the rotary shaft (24) in a vertical direction; Hydraulic cylinders (41a, 41b) installed in the change body in a direction orthogonal to the rotation shaft (24) as a means for turning the chuck exchange means; A piston rack (42) formed on the hydraulic cylinder and configured to generate a predetermined stroke; A pinion 43 engaged with the rack; Chuck clamp means (50) coupled to the spindle device and the chuck of the machining area to clamp or unclamp the chuck by a selective action of the drawbar of the spindle device; It is an automatic chuck exchange device of a CNC lathe characterized in that configured to include.

Description

Automatic chucking changer for CNC lathe}

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 changer of the CNC lathe according to the present invention.

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

FIG. 5 is a cross-sectional view taken along the line BB of FIG. 4. FIG.

6 is an enlarged side sectional view of the table up / down means in FIG. 4;

7 is an enlarged side sectional view of the chuck clamp means in FIG.

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

T: unprocessed area, Ta: process area,

W: workpiece to be processed, Wa: machined workpiece,

C: chuck of workpiece to be machined, Ca: chuck of workpiece to be machined,

1: spindle unit, 2: spindle body,

3: spindle axis, 4: drawbar,

5: hydraulic rotary cylinder, 6: pulley,

10: changer body, 12: chuck base,

20: chuck exchange means, 21: chuck seat hole,

22: chuck change table, 24: rotary shaft,

30: table up / down means, 31: cylinder tube,

32: piston, 33: piston guide pin,

34: guide hole, 35: bearing,

36: dog, 38: sensing switch,

40: power generation and transmission means, 41a, 41b: hydraulic cylinder,

42: piston rack, 43: pinion,

44: stopping block, 45: stopper,

50: chuck clamp means, 51: fixing bolt,

52: spherical jaw, 52a: locking groove,

53: clamp block, 54: jaw,

54a: clamp groove, 55: clamp link,

56: chucking euros, 60: cover,

62: changer door,

The present invention relates to an automatic chuck changer of a CNC lathe, and more particularly, to an automatic chuck changer of a CNC lathe for automatically exchanging a workpiece to be processed on a CNC lathe and a finished workpiece. .

In order to process a workpiece in a general CNC lathe, as shown in FIG. 1, the chuck 120 must be directly fixed to the spindle 100 with a bolt 110, and when the workpiece 150 is replaced, the processed workpiece is After removing from the chuck 120, it has to go through the process of clamping by moving to the position of the chuck 120 for processing the shape of the workpiece to be processed. Not only did the processing time take a lot of time, but also caused a huge obstacle in productivity, there was an inconvenience to replace the chuck 120 by loosening the fixing bolt 110, or to process in other dedicated equipment when processing a workpiece with a different shape.

Reference numeral 130 is a drawby, 140 is a hydraulic cylinder.

The present invention was created to solve the above problems, the object is to automatically exchange the workpiece to be processed on the CNC lathe and the finished workpiece to minimize the non-working time, chuck replacement or additional additional equipment An object of the present invention is to provide an automatic chuck changer of a CNC lathe, which allows machining of different shapes simultaneously on a single lathe without the need.

In order to achieve the above object, the present invention, in configuring a device for replacing the chuck in a CNC lathe,
A changer body 10 which fixes the spindle device 1 vertically placed on the processing area and the chuck base 12 of the non-processing area to be positioned on the same horizontal line;
A chuck exchange means for moving the chuck of the finished workpiece to the chuck base and moving the chuck of the workpiece to be processed toward the spindle apparatus, the shaft center being installed so that the divided centers of the machining zone and the unprocessed zone are rotated;
A table up-down means (30) fixed to the changer body and having a piston (32) bearing-supported to move the chuck exchange means in a vertical direction by a hydraulic actuation force and to lift the rotary shaft (24) in a vertical direction;
Hydraulic cylinders (41a, 41b) installed in the change body in a direction orthogonal to the rotation shaft (24) as a means for turning the chuck exchange means;
A piston rack (42) formed on the hydraulic cylinder and configured to generate a predetermined stroke;
A pinion 43 engaged with the rack;
And the chuck clamp means 50 coupled to the spindle device and the chuck of the machining area to clamp or unclamp the chuck by a selective action of the drawbar of the spindle device.

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EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described in detail based on attached drawing.

Figure 2 is a plan view showing an automatic chuck changer of the CNC lathe according to the 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. 4, FIG. 6 is an enlarged side cross-sectional view of the table up / down means in FIG. 4, and FIG. 7 is an enlarged side cross-sectional view of the chuck clamp means in FIG. to be.

In the configuration of the present invention, in configuring an apparatus for exchanging chucks in a CNC lathe,

The changer body 10 which fixes the spindle apparatus 1 vertically entered on the processing area Ta and the chuck base 12 of the non-processing area T is located on the same horizontal line.

In addition, the chuck Wa of the finished workpiece is axially coupled to the changer body 10 at the divided center of the machining region Ta and the non-processing region T to rotate. (12), the chuck exchange means 20 which moves the chuck | zipper W of the workpiece to process to the spindle apparatus 1 side is comprised.

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, by the configuration of the coupling of the changer body 10 and the chuck exchange means 20, by generating a power to rotate the chuck exchange means 20 by 180 ° by converting a linear movement by the hydraulic actuation force into a rotary motion and Configure the 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. The chuck clamp means 50 is configured.

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.

On the other hand, the chuck exchange means 20 of the present invention is a chuck formed in the chuck seating hole 21 symmetrical with each other to guide the chuck (C) of the non-processing area (T) and the chuck (Ca) 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.

Meanwhile, as shown in FIG. 6, the table up / down means 30 includes a cylinder tube 31 fixed to the inner side and the outer side of the changer body 10 and a rotating shaft installed inside the tube 31. And a piston (32) supported by a bearing (35) to lift the (24) in a vertical direction, the positive side of the piston (32) being opposed to the cylinder tube (31) and the piston (32). Piston guide pins 33 and guide holes 34 are formed for positioning. In addition, the bearing 35 is coupled to the piston 32, which is a non-rotating body, to support the rotating shaft 24, which is a rotating body. In addition, a dog 36 is installed at the outer end of the piston 32 and a sensing switch 38 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.

On the other hand, the power generating and transmitting means 40 is a hydraulic cylinder (41a, 41b) fixed to the both sides of the changer body 10 in the direction orthogonal to the rotating shaft 24, as shown in Figure 5, the hydraulic cylinder And a pinion 43 slidably engaged with the rotary shaft 24 and engaged with the piston rack 42 so as to generate a constant stroke reversed / reversed to (41a) and 41b. .

In addition, the stopper block 44 is axially coupled to the rotating shaft 24 to determine the rotation range (180 °) of the chuck exchange means 20 at the lower portion of the power generating and transmitting means 40, the opposite The changer body 10 has a stopper 45 fixed to be installed side by side.

On the other hand, the chuck clamp means 50 is fixed to the spherical jaw 52 and the spindle shaft 3 is fixed to the end of the draw bar (4) by the fixing bolt 51 as shown in FIG. The jaw (54) clamping the chuck (Ca) at its upper end is pivotally coupled to the clamp block (55) and the clamp block (55) configured to slide, and one end thereof is the jaw (54) and the other end is spherical jaw (52). It is configured to include a clamp link (55) for clamping / unclamping the chuck (Ca) is established by the interlocking relationship is established in the vertical movement of the draw bar (4).

In addition, the clamp block 55 has a chucking flow path 56 so as to clamp the workpiece Wa through the hollow portion between the spindle shaft 3 and the draw bar 4 to the air pressure flowing from the rear of the spindle device 1. Is formed.

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 should be separated, the area is divided into a cover 60 as shown in FIGS. 2 and 3. Also, 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 moved left and right so as not to interfere with the cover 60 that is fixed during the turning operation. After the installation was configured so that the table 22 is rotated.

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 rotating shaft 24 is moved upward by the operating stroke of the piston 32, and the processing area Ta and the non-processing area T are Both sides of the changer body 10 in a state where each chuck Ca (C) of the lifter is lifted to a position where interference does not occur with the chuck base 12 and the clamp block 53 while being seated in the chuck seating hole 21. The hydraulic cylinders 41a and 41b fixedly installed in the cylinder 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 rail 63, the area position of the chuck Ca (c) mounted on the chuck seating hole 21 of the chuck change table 22 is Completely 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.

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 drawbar 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 drawbar 4, and the upper side 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 is rotated by the driving force of the spindle motor (not shown) to process the workpiece W, while the operator completes the workpiece Ta which is changed to the unprocessed area T after the machining is completed. Just replace the workpiece (W) to be processed.

The apparatus of the present invention is repeatedly and 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 during the machining of the workpiece in advance, so that not only the unworking time such as replacement of the chuck or replacement of the workpiece can be reduced, but also suitable for the workpiece. Since the chuck can be automatically exchanged with the workpiece, multiple machining can be performed with one machine, which can be expected to have several advantages of improved productivity and workability.

Claims (5)

In constructing a device for changing the chuck on a CNC lathe, A changer body 10 which fixes the spindle device 1 vertically placed on the processing area and the chuck base 12 of the non-processing area to be positioned on the same horizontal line; A chuck exchange means for moving the chuck of the finished workpiece to the chuck base and moving the chuck of the workpiece to be processed toward the spindle apparatus, the shaft center being installed so that the divided centers of the machining zone and the unprocessed zone are rotated; A table up-down means (30) fixed to the changer body and having a piston (32) bearing-supported to move the chuck exchange means in a vertical direction by a hydraulic actuation force and to lift the rotary shaft (24) in a vertical direction; Hydraulic cylinders (41a, 41b) installed in the change body in a direction orthogonal to the rotation shaft (24) as a means for turning the chuck exchange means; A piston rack (42) formed on the hydraulic cylinder and configured to generate a predetermined stroke; A pinion 43 engaged with the rack; Chuck clamp means (50) coupled to the spindle device and the chuck of the machining area to clamp or unclamp the chuck by a selective action of the drawbar of the spindle device; Automatic chuck exchange device of the CNC lathe characterized in that comprising a. The chuck changing means comprises a chuck change table 22 for guiding the chuck in the unprocessed area and the chuck in the machining area, and a rotating shaft 24 axially coupled to the chuck change table. Chuck changer of CNC lathe. delete delete The method of claim 1, wherein the chuck clamp means is composed of a spherical jaw 52 fixed to the end of the draw bar and a jaw fixed to the spindle shaft and clamped on the upper end of the jaw to slide the spindle device therein. Clamping block 53 is formed with a chucking flow path for introducing the chucking air pressure flowing through the chuck, and one side end is jaw, the other end is spherical jaw while being pivotally coupled to the clamp block interlocked during vertical movement of the draw bar And a clamp link (55) configured to clamp / unclamp the chuck by establishing a relationship.

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