KR100899091B1 - Eccentric Boring Equipment Using Vertical Lathe - Google Patents

Abstract

The present invention relates to an eccentric boring device using a vertical lathe, and more specifically, to boring the inside of a workpiece having two insertion holes eccentrically, such as an oil pump housing used for a transmission of an automobile, using a vertical lathe. It is to. Eccentric boring device using a vertical shelf of the present invention is installed on the lower side and the chuck for fixing the workpiece on the upper surface, the first cutting tool for cutting the workpiece rotated by the rotation of the chuck, and the first cutting tool is installed An eccentric boring apparatus using a normal vertical lathe comprising: a cutting tool mounting plate; and a conveying device installed on the upper side and a first cutting tool fixed to the cutting tool mounting plate; A frame attached to the cutting tool mounting plate; A rotating shaft rotatably installed on the frame; A second cutting tool installed to protrude laterally at a lower end of the rotating shaft; A driving device installed in the frame and generating a driving force for rotating the rotating shaft of the frame; And an anti-rotation device capable of selectively inhibiting rotation of the chuck.

Vertical lathe, eccentric, boring

Description

Eccentric Boring Equipment Using Vertical Lathe}

1 is a view showing the structure of the oil pump housing.

2 is a view showing the shape of a conventional vertical shelf.

Figure 3 shows an eccentric boring device of the present invention.

4 is a view showing a first cutting tool of the present invention.

5 is a view showing a second cutting tool of the present invention.

Figure 6 shows the assembly structure of the oil pump housing.

** Explanation of symbols on the main parts of the drawing **

1: Vertical Lathe 10: Chuck 20: First Cutting Tool

30: cutting tool mounting plate 40: feeder 50: frame

60: rotating shaft 70: driving device 80: second cutting tool

90: power transmission unit

The present invention relates to an eccentric boring device using a vertical lathe, and more specifically, to boring the inside of a workpiece having two insertion holes eccentrically, such as an oil pump housing used for a transmission of an automobile, using a vertical lathe. It is to.

As shown in FIG. 1, an outer rotor 100 and an inner rotor 200 are mounted in a gear pocket of a housing, as shown in FIG. 1. The outer shaft surface 110 and the lower surface of the outer rotor 100 is in contact with the center of the gear pocket 310, the drive shaft insertion hole 320 is inserted into which the drive shaft for rotating the inner rotor 200 is inserted The oil is supplied into the transmission by the rotation of the outer rotor 100 and the inner rotor 200 which are formed and engaged in an eccentric state.

Since the outer / inner rotors 100 and 200 and the drive shaft should be inserted into and rotated in the gear pocket 310 of the oil pump housing 300, the housing forming the gear pocket 310 and the drive shaft insertion hole 320 may be primary. After casting the furnace, boring is used to finally control the inner surface dimensions and surface roughness.

As shown in FIG. 2, the conventional vertical lathe 1 includes a chuck 10 installed at a lower portion thereof, a first cutting tool 20 for cutting a work piece, and a first cutting tool 20. It comprises a cutting tool mounting plate 30 to be installed, and a conveying device 40 for transferring the first cutting tool 20 is installed on the top and fixed to the cutting tool mounting plate 30 to the top, bottom, left and right. . Although not shown in the drawings, the lower part of the chuck is provided with a driving source such as a motor and a driving force transmission device such as a gear to rotate the chuck, and the workpiece fixed to the upper part of the chuck in accordance with the rotation of the chuck is cut by the first cutting tool. Can be. However, in this case, since the chuck rotates, it is possible to boring the same hole in the workpiece as the center of rotation of the chuck. However, when another eccentric hole exists in the workpiece, it is not easy to boring it.

In some cases, boring for workpieces with eccentric holes, such as oil pump housings, may be performed using machining centers or eccentric moving chucks used in automatic lathes. In this case, the parallelism and tolerance of the machining plane and the reference plane are not only difficult to adjust, but also require a long machining time. When the eccentric travel chuck is used, it takes much time to set up, and the machining center or the eccentric travel chuck is the price. There was a problem of this expensive.

The present invention has been made to solve the above problems, an object of the present invention is to enable boring processing of two eccentric insertion holes simply by using an existing vertical lathe without using a machining center or an eccentric moving chuck. .

Eccentric boring device using a vertical shelf of the present invention

A chuck for fixing the workpiece on the upper surface, a first cutting tool for cutting the workpiece rotated by rotation of the chuck, a cutting tool mounting plate for installing the first cutting tool, and an upper portion An eccentric boring apparatus using a normal vertical lathe comprising a conveying apparatus for conveying the first cutting tool fixed to the cutting tool mounting plate up, down, left and right;

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A frame attached to the cutting tool mounting plate;

A rotating shaft rotatably installed on the frame;

A second cutting tool installed to protrude laterally at a lower end of the rotating shaft;

A driving device installed in the frame and generating a driving force for rotating the rotating shaft of the frame;

Characterized in that the anti-rotation device that can selectively suppress the rotational movement of the chuck.

The eccentric boring device using the vertical shelf may further include a power transmission unit for transmitting the driving force of the driving device to the rotating shaft.

It is also preferable that the eccentric boring device using the vertical lathe further includes an adjusting mechanism for adjusting the distance between the bite tip of the second cutting tool and the center of the rotation axis.

Hereinafter, the present invention will be described in more detail according to an embodiment of the boring operation of the gear pocket and the drive shaft insertion hole of the oil pump housing. In this embodiment, the description of the well-known known configuration for the cutting oil supply device, the feed device, and the like used in the vertical lathe is omitted.

3 shows an eccentric boring apparatus using the vertical lathe according to the present invention. The frame 50 is attached to the cutting tool mounting plate 30 of the conventional vertical lathe 1 of FIG. 2, and the rotating shaft is attached to the frame 50. After rotatably installing (60), the rotating shaft (60) is rotated using a driving device (70) such as a motor. The lower end of the rotary shaft 60 is provided with a second cutting tool 80 that can cut the workpiece in accordance with the rotation of the rotary shaft.

The first cutting tool 20 is the attachment of the bite 24 to the cutting bag 22, as shown in Figure 4, it may be attached to the cutting tool changer 26, as shown in Figure 2 to the cutting tool mounting plate 30 It can also be used by attaching a cutting bag.

The second cutting tool may also be provided with a bite to protrude laterally at the bottom of the rotating shaft in the form as shown in FIG. In addition, the second cutting tool 80 further includes an adjusting mechanism for adjusting the distance between the center of the rotating shaft and the tip of the bite at the lower end of the rotating shaft 60 as shown in FIG. 5 to boring the inner surfaces of the drive shaft insertion holes of various diameters. It is also possible. The adjusting mechanism can adjust the distance y between the tip of the bite and the center of the rotating shaft to form a hole 86 penetrated in the radial direction of the rotating shaft 60, and the cutting bag 82 inserted through the hole. ) To adjust the distance and to fix the position with a bolt (88) or the like.

 3 is shown to transmit the rotational force using a drive belt 90 corresponding to the power transmission unit between the drive and the rotating shaft, of course, it is also possible to rotate the rotating shaft by connecting the drive directly to the rotating shaft.

At this time, the workpiece that is in contact with the second cutting tool that rotates in accordance with the rotation of the rotary shaft is required to prevent the rotation device for fixing the chuck because the machining position can be changed when the chuck is rotated.

The anti-rotation device 12 for preventing the rotation of the chuck is a normal vertical as well as a brake device that can suppress relative rotational movement of the chuck 10 and the main body of the vertical lathe 1, or a fastening member for mutually fixing the chuck and the vertical lathe. It can be implemented as any means capable of suppressing rotation of a power source or power transmission device such as a motor or gear installed in a lathe.

Hereinafter, a method of processing an oil pump housing using an eccentric boring device using the vertical lathe as described above will be described.

6 shows the outer rotor 100 and the inner rotor 200 are inserted into the gear pocket 310 in the oil pump housing, the inner rotor 200 is connected to the drive shaft through the drive shaft insertion hole 320, The gear pocket 310 and the drive shaft insertion hole 320 are eccentric with each other.

First, the oil pump housing is fixed to the chuck so that the center of the gear pocket in which the outer rotor of the oil pump housing is mounted is positioned equal to the center of the chuck.

Subsequently, the first cutting tool having the shape shown in FIG. 4 is moved into the gear pocket by using a vertical lathe feeder, and the bottom and side surfaces of the gear pocket are bored while the chuck is rotated.

After the boring of the gear pocket on which the outer rotor is mounted is finished, the feed device is operated to move the second cutting device to the drive shaft insertion hole. In some cases, the inner surface of the drive shaft insertion hole coincides with the arc formed by the rotation of the second cutting tool through a process of moving the chuck slightly in the rotational direction. After fixing the chuck by the anti-rotation device to rotate, the driving device is driven to rotate the second cutting tool protruding from the bottom of the rotary shaft to the side as shown in Figure 5 to boring the drive shaft insertion hole.

The driving device used in the present invention can be any one capable of generating a rotational force regardless of electric or hydraulic pressure, and the power transmission unit can achieve the technical idea of the present invention by using any known configuration such as a gear or a belt. Of course it can.

In addition, the above-described processing method may be changed to a form in which the drive shaft insertion hole for rotating the inner rotor is first bored, and then boring the gear pocket in which the outer rotor is mounted, as necessary.

According to the present invention, the chuck movement time or machining time required when using the eccentric moving chuck or the machining center can be omitted, and the processing time can be shortened, and precise boring processing can be performed without using expensive equipment. .

Claims (3)

A chuck for fixing the workpiece on the upper surface, a first cutting tool for cutting the workpiece rotated by rotation of the chuck, a cutting tool mounting plate for installing the first cutting tool, and an upper portion An eccentric boring apparatus using a normal vertical lathe comprising a conveying apparatus for conveying the first cutting tool fixed to the cutting tool mounting plate up, down, left and right; A frame attached to the cutting tool mounting plate; A rotating shaft rotatably installed on the frame; A second cutting tool installed to protrude laterally at a lower end of the rotating shaft; A driving device installed in the frame and generating a driving force for rotating the rotating shaft of the frame; Eccentric boring device using a vertical shelf characterized in that it comprises a rotation preventing device that can selectively inhibit the rotational movement of the chuck. The eccentric boring apparatus according to claim 1, further comprising a power transmission unit for transmitting the driving force of the driving device to the rotating shaft. The eccentric boring apparatus according to claim 1, further comprising an adjusting mechanism for adjusting a distance between the bite tip of the second cutting tool and the center of the rotating shaft.

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