KR900004276B1 - Automatic tool feed apparatus for a boring machine - Google Patents

Abstract

A spindle shaft (1) from a boring spindle head (H) is supported on an outer support (S), and can be rotated when the spindle head is rotating by a driving motor. A lead screw (2) inserted into the spindle shaft allows the inner face of an tool (16) assembled in the spindle shaft to move, when the spindle shaft is rotated in the CCW and CW direction by means of gears in a feed gear box (3). The feedgear box comprises a sun gear (5), a center shaft (5'), a transmission gear (6), and reduction gears (7)(8)(9) coupled to a driving gear (10) of a screw shaft (4).

Description

Automatic tool feeder using spindle rotation in boring machine

1 is a schematic perspective view of a boring machine according to the present invention.

2 is a perspective view of the main portion of the present invention.

3 is a longitudinal sectional view showing main parts of the present invention.

4 is a plan sectional view in a state where the main part of the present invention is developed.

5 is a cross-sectional view showing the configuration of the gearbox according to the present invention.

6 is a sectional view of a main shaft provided with a tool according to the present invention.

Figure 7 (a) (b) is a block diagram showing the tool position according to the present invention.

8 is a block diagram of a headstock according to the present invention.

9 is a front view showing a conventional boring machine.

10 is a perspective view of a conventional tool and headstock.

* Explanation of symbols for main parts of the drawings

H: Spindle Head S: Outer Support

1: Spindle Shaft 2: Lead Screw

3: feed gear box 4: screw shaft

5: Sun gear 6: Speed gear

7, 8, 9: gear reduction gear group 10: drive gear

12: clutch 14: shift lever

The present invention relates to an automatic tool feeder using the spindle rotation applied to the boring machine (BORING MACHINE).

Specifically, the hole cutting tool of the workpiece is rotated and moved by the rotation of the spindle shaft, and the forward and backward movements are freely adjusted so as to process the holes for the workpiece of the fixed body.

Generally, boring machines are machine tools for processing holes in a workpiece, and are intended to cut or polish the inner diameter of the holes by rotating tools.

That is, the rotating tool is cut to the same inner diameter while being moved and connected to the long hole as a whole, and is mainly used to machine the precise inner diameter of the workpiece.

In the conventional boring machine, the line boring operation is a long hole of the workpiece because the rotation of the workpiece is performed with the tool mounted at the intermediate point of the main shaft as shown in FIGS. 9 and 10 of the accompanying drawings. To cut, the table on which the workpiece is seated is reciprocated to machine the inner diameter of the hole.

In the above machining operation, the table is reciprocated between the spindle head and the support, so the reciprocation section is narrowed as much as the length. Moreover, the large reciprocating section is short even if it is placed on the table. Overall machining will be impossible.

Therefore, the spindle may be extended to extend the distance between the spindle head and the support. However, the longer the spindle, the more vibration is generated, which makes precision machining impossible.

In the present invention, the machining is not performed while the table on which the workpiece is seated is reciprocated, but the workpiece is fixed and the tool is configured to process the hole while the tool is reciprocated.

In other words, the table on which the workpiece is seated is configured to allow the tool rotated by the main shaft to move together with the rotation to secure a grand processing section (reciprocating section) corresponding to the entire length of the main shaft. This will be described in detail with reference to the accompanying drawings.

When the other end of the grand spindle 1 connected to the shaft from the spindle head H is supported by the support S, and the spindle head H is rotated by a drive motor (not shown), the spindle 1 is rotated. In a known boring machine configured to rotate, the lead screw (2) having a threaded surface is formed by forming a longitudinal groove in the main shaft (1) in a longitudinal direction, and one side thereof is mounted at the end of the main shaft (1). It is connected to the screw shaft 4 of the fed feed box (Feedgear Box) 3, the feed gear box 3 is rotated with the main shaft (1) at the end of the main shaft (1).

The inner configuration of the cover gear box (3) is a sun gear (Sungear) (5) is built in the center, the reduction gear group (7) (8) (9) is engaged with each other meshing around the sun gear (5). As it is installed in a spiral line with the transmission gear, it is configured to achieve a single speed reduction. That is, the gear engaged with the sun gear 5 in the center is the transmission gear 6, and the gear 1 has the first gear reduction gear 7, the second gear gear 8 and the third gear gear 9. Deceleration is performed by being engaged in series, and the drive gear 10 of the lead screw 2 is engaged with the third reduction gear 9.

The center shaft 5 'of the sun gear 5 penetrates through the feed gear box 3, and the clutch gear 11 is connected to the outside, and the clutch 12 penetrates from the housing K. ) Is configured to be coupled to surround the clutch gear (11).

The clutch 12 is connected to the sliding shaft as shown in FIG. 5, and the longitudinal axis is formed in the clutch shaft 12 'so that the key l3 is lodged, thereby suppressing the rotation of the clutch shaft 12'. When the clutch 12 is engaged with the clutch gear 11, the central shaft 5 ′ including the sun gear 5 is fixed.

A shift lever 14 is mounted on a side of the feed gear box 3, and a fork 14 ′ penetrated into the inside shifts the shift gear 6 from the shaft to achieve three levels of shifting. The idler gear 15 is engaged with the reversing lever 15 '.

The tool 16 reciprocated while being rotated by the main shaft 1 is configured such that the tool 16 is divided into upper and lower parts and assembled into bolts 17 and 17 'as shown in FIGS. 6 and 7. The upper and lower tool positions are alternately installed at the front and rear positions, and the radius at the center is set so that the tool at the front position has a short radius and the tool at the rear position has a long radius. It is designed to compensate for the tool shake while increasing the cutting amount by the first and second cutting operations by the upper and lower tools.

In addition, the inner diameter surface inserted into the main shaft (1) is coupled to the key 18 to form a sliding rail to suppress the idle rotation of the tool 16, the upper ball ball (Ball Cup interviewed by the lead screw 2) 19 is inserted and installed.

The present invention configured as described above operates the clutch 12 or the shifting and reversing lever 14 and 15 'of the feed gear box 3 while the tool 16 rotates together when the spindle 1 rotates. As a result, the operation of the tool 16 can be varied.

Referring to the machining operation of the present invention in more detail as follows.

When the spindle 1 driven from the spindle head H is rotated, the tool 16 is rotated together, and the entire gear inside the feed gear box 3 is also rotated together with the spindle 1.

Thus, the tool 16 is to be rotated in place, and when the operator operates the clutch lever to engage the clutch 12 with the clutch gear 11, the sun gear shaft 5 'is fixed.

At this time, the transmission gear 6 meshed with the sun gear 5 rotates about the sun gear 5 and rotates, thereby engaging the first-third reduction gears 7, 8, and 9 engaged therewith. The lead screw 2 is rotated because the drive gear 10 of the screw shaft 4 is rotated in the state of finally decelerating properly.

On the other hand, while the tool 16 is rotated by the main shaft (1) while the lead screw 2 is rotated to move forward along the screw surface of the lead screw 2, the moving speed is the shift lever 14 It is possible to increase or decrease the moving speed of the tool 16 by selectively sliding engagement of the transmission gear 6 by operating.

On the contrary, when the idler gear 15 is engaged with the drive gear 10 by operating the reversing lever l5 ', the lead screw 2 is reversed because the drive gear 10 receives the opposite rotational force. 16 is made backward, the rotational direction of the tool 16 is always the same, and the backward movement speed can also be increased or decreased in the same way as forward.

In this way, when the tool 16 is rotated equally by the rotation of the main shaft 1, the primary cutting is performed by the upper tool located at the center with a short radius at the center, and then the lower tool located at the rear with a long radius at the rear side. The inner diameter of the workpiece is cut by performing fine cutting, and the overall cutting operation of the inner diameter proceeds as the tool 16 reciprocates on the main shaft 1.

On the other hand, when the tool 16 is in place, the operator pulls the clutch lever 12.

At this time, since the clutch 12 is separated from the sun gear 5 and the restraint of the sun gear shaft 5 'is released, the sun gear 5 is rotated together with the main shaft to stop the rotation of the reduction gear group related thereto.

Therefore, since the rotation of the lead screw 2 is in a stopped state, the tool 16 is only rotated in place.

In the present invention as described above, since the tool is not reciprocated and the tool is rotated to reciprocate the hole contents of the workpiece, the processing stroke section is further increased.

Therefore, even large workpieces with long holes can be machined by the present invention as long as they do not deviate from the length of the spindle. Also, the tool can be easily moved forward, backward, increase, and decelerate to achieve various machining conditions with precision. It is effective.

In addition, since the boring machine of the present invention is placed in a fixed state, the configuration for reciprocating a table with a relatively high load can be abolished, and the occurrence of severe wear and error on the sliding surface of the bed is prevented, and repair And it is a very useful invention that the trouble of exchange can be eliminated.

Claims (2)

Well-known boring configured so that the other end of the grand spindle 1 connected from the spindle head H to the shaft is supported by the support S, and the spindle 1 rotates when the spindle head H is rotated by the drive motor. In the machine, the main screw (1) when the lead screw (2) in the longitudinal direction of the main shaft (1) is rotated forward or reverse by the gear group in the feed gear box (3) at the end of the main shaft (1) Automatic tool feeder using the spindle rotation in the boring machine, characterized in that the internal contact surface of the tool (16) assembled in the structure is configured to be moved by the screw of the lead screw (2). The center gear and the sun gear 5 are located in the center of the inside of the feed gear box 3, where the transmission gear 6 and the reduction gear group 7, 8, 9 are engaged in series. Gears of the reduction gear group (7) (8) (9) or reverse rotation idler (15) are selectively mounted on the drive gear (10) of the screw shaft (4) connecting the lead screw (2). The sun gear 5 is restrained and released by the clutch 12 installed at the rear of the gear box, and the increase / deceleration speed lever 14 and the reverse lever 15 'are placed on the side of the gear box 3, respectively. And variable rotation, automatic tool feeder using the spindle rotation in the boring machine, characterized in that the feed gear box (3) configured to rotate while all the gears are rotated around the sun gear (5).

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