JPS58149111A - Portable type bore cutting device - Google Patents

Abstract

PURPOSE:To cut a bore by arranging a cutting tool holder on the outer periphery of one end of a turning spindle adapted to be inserted in the bore to be cut so that the cutting tool is advanced while the spindle is rotated. CONSTITUTION:In case that a complicated machining including a groove cutting process (see the oblique line part G) for the internal surface 3b of, for example, a bearing, a cutting tool 16 which is set on a saddle in a cut-in mechanism is moved in the radial direction (arrow C) by manipulating a cut-in handle 15 while a turning spindle 4 is rotated and fed in the axis direction (arrow B), and desired cutting steps are carried out one by one for completing the cutting process. Further, accurate sizing may be made by manipulating the handle 15 while observing a dial gage 62.

Description

[Detailed description of the invention] Ru.

Generally, in machining, the equipment to be machined is dismantled on site, brought to a machine shop, installed on a machine tool, and machined.

However, when modifying large equipment, such as cutting the main reducer for driving rolling rolls or the bearing fitting part of a binion stand that has already been installed in steelmaking equipment, it is necessary to dismantle it from the site and bring it to the machine shop. In order to bring it in, it requires disassembly, transportation, and assembly (: a long production stoppage and a huge amount of labor, and it is actually impossible to bring it to a machine shop.Therefore, when corrective processing is absolutely necessary) The only way to do this is by hand finishing (it is difficult to perform corrections to the expected precision).

In order to solve the above-mentioned problems, the present invention brings a cutting device suitable for the workpiece to the site, and allows for simple and quick correction machining by simply disassembling the reducer, which is the workpiece, to a minimum. The purpose of the present invention is to provide a portable internal diameter cutting device that enables highly accurate machining, and its gist is as follows.

That is, it is a portable cutting device that performs cutting at the installation position of the workpiece, in which a turning spindle inserted into the inner diameter part to be cut is connected to a rotational drive mechanism at one end thereof, and installed.
A cutter is held at the end of a cutter holder provided on the outer periphery of the turning spindle so as to be able to move forward and backward, and a telescoping mechanism is attached to the outer periphery of the spindle for adjusting the centering of the turning spindle in the radial direction and fixing it to the inner diameter part; This is a portable inner diameter cutting device characterized in that a saddle equipped with a rotational drive mechanism for the turning spindle is movable on a base in the spindle axis direction and in a direction perpendicular to the spindle axis direction.

Next, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 shows the drive system arrangement of a main reduction gear 1 and a binion stand 2 of a rolling equipment, which is a workpiece. Figure 2 is a cross-sectional view of the pinion stand 2, showing bearing fitting parts 3a, 3b, 3c, 3d.
This figure shows the shape of .

Figure 3 is a side view of the entire assembly of the device of the present invention.
The cutter holder 7a+7b+7c+7d is fitted into the 4/5O-4R1 part through the key 6, and a notch body 8 having a dovetail groove shape is formed at one end of the cutter holder (Figs. 5 and 6). , Fig. 7) is fixed, and the upper saddle 9 of the notch body 8 is fitted and arranged so as to be movable back and forth.The saddle 9 is provided with a female thread 1o, and the notch body 8 is provided with a group screw 11, and the two are engaged. A gear 13 with this installed on the interlocking shaft 12
The gear 14 provided on the dowel screw 11 is engaged, and the interlocking shaft 1
When the handle 15 fixed to the other end of the handle 2 is rotated left and right, the saddle 9 on which the cutter 16 can be mounted guides the cutting body 8 and slides in the direction of arrow A as shown in Fig. 7 for groove machining. The depth of cut is now possible. The cutting mechanism is configured with the above configuration.

Next, the centering and fixing mechanism of the turning spindle will be explained with reference to FIG. The turning spindles 4.5 are equipped with a plurality of elastic tension bolts 18 on the outer periphery in the axial direction of the turning spindles 4 and 5 in which the cutting mechanism is arranged, and the turning spindles 4.5 are equipped with an eccentric cam 17 and a built-in bearing 16a'=16d. It is pivotally supported to form a turning spindle centering and fixing mechanism. However, the turning spindle 4.5 is fixed with tension port 1.
8 is fixed to the inner surface of the workpiece by expanding and contracting 5. Rough centering is also possible at the same time as fixing. By rotating the eccentric cam 17, the turning spindle is accurately centered.

Next, the drive that applies rotational force to the turning spindles 4 and 5 will be explained with reference to FIGS. 3 and 4. From the figure, the bed m mounted on the drive frame 19, the upper part ζ2 of 21, and the prime mover η, respectively.
, 23 and cutting thrust receivers 24.25 are arranged, and the prime mover η, 23 and cutting thrust receivers 24.25 are sequentially connected to a turning spindle to constitute a drive mechanism that provides cutting rotational force.

Further, a compound saddle 26.27 is fitted onto the sliding portion a of the bed 20.21. The double saddle 26, 27ζ
- is a female screw, 29 is provided, and the female screw, 29 is engaged with a lead screw, 31, provided on the bed 20, 21;
Group screw 30. :Double saddle 2 by rotating 3+
6°27 moves back and forth using the bed 20.21 as a guide and slides in the direction of the arrow in the figure. To make this operation continuous 1
, the electric motors 32, 33 are arranged on the upper part of the drive frame 19 as shown in FIG.
37 is connected with a chain: '38.39, and a feeding mechanism that enables single interlocking by applying rotational force is constructed.

The inner diameter cutting device of the present invention is constituted by the cutting mechanism, the turning spindle centering and fixing mechanism, the turning spindle driving mechanism, and the feeding mechanism described above. In addition, although the explanation so far has shown the specific configuration of the minimum mechanism required for internal diameter cutting,
Adding a secondary item is more preferable for cutting.

That is, as shown in Fig. 3, a dovetail groove is provided on the upper part of the double saddle 26° nail, and the turning spindle rotation prime mover 22,
The saddle 40.41 carrying the 2.3 is fitted into the groove. The saddle 40.41 is provided with a female thread 42.43, while the compound saddle 26.27 is provided with group screws 44a, 44b that engage with the female thread 42.43.
, 44b by rotating the saddle 1.
0゜41 is guided by the dovetail groove of the compound saddle 26.27 and slides left and right, and the saddle 40゜41 equipped with the prime mover 22.23 can move along the X axis (X-X), and the drive unit Makes centering easy.

In addition, support and fixation of the drive frame 19 on which the drive mechanism is mounted will be explained with reference to FIGS. 3, 4, and 10.

A leveling block 46 is placed on the workpiece 45 as shown in the figure.
a, 46b (46c, 46d) are arranged at the minimum necessary four locations, and the drive frame 19 is supported on the workpiece 45 via these leveling blocks. By configuring a spherical seat C on the leveling block, the drive mount can be used even if the mounting surface of the workpiece 45 is uneven.]9
It supports the weight of the drive part proportionally, does not cause distortion in the drive part when it is fixed, and also skillfully absorbs chatter caused by cutting resistance. Mana drive frame 19 (second is 8 telescopic tension bolts 61a l 6'lb + 61c 161d
1.6iet 6, 1 fri 6t, 61h and presser metal fittings are arranged to ensure support and fixation of the drive frame 19.

Next, the cutting means by the apparatus of the present invention will be explained.

Figures 2 and 3 show the bearing fitting part 3 a + 3 b + 3 C + 3 of the binion stand 2 for driving rolling mill rolls.
This is an example of processing d. First, the turning spindles 4 and 5 are installed on the spigot surface 3 provided on the binion stand 2.
A, 3B, 3C, 3Dln Centering bearings 16a, 16b, 16c installed in the turning spindle.

The four telescopic tension bolts 18 disposed on the outer periphery of 16d are lightly laminated to support the turning spindle 4.5, and then the cutter boulders 7a, 7b, 7 which constitute the cutting mechanism are formed.
c and 7d are fitted onto the turning spindle 4.5, and the installation of the cutting part is completed. Further, the cutter holder may be installed in advance with the turning spindle (two-fitting arrangement) and then installed together with the turning spindle.

Next turning spindles 4, 5 and bearing fitting part 3a.

3b, 3c, and 3d, as shown in FIGS. 8 and 9, dial gauges 49a, 49b are brought into contact with the bearing surfaces 3b, 3d (3a, 3c) of the turning spindles 4, 5. Gently rotate the dial gauge 4.
While checking 9a and 49b, install the free centering bearing (
(See Figure 3) 16a, 16b, 16c, 1
6d telescopic tension bolt 18 and eccentric cam 17 are adjusted to match the bearing surface 31), 3d (3a, 3c) to be cut on the turning spindle 4.5.

Next, as shown in Fig. 9, a water level is mounted on the upper part of the turning spindle, which is aligned with the center of the bearing surface to be machined, to measure the levelness.
3 and stretches 53a and 53b to increase the center distance e1. Measure θ2 and parallelism.

This makes it possible to clearly measure the horizontality and parallelism of the axes and the distance between the axes, which are most important for workpieces such as reducers, and enables highly reliable centering.

Figure 10 shows drive couplings 54 and 55 connected to the centers of the two upper and lower turning spindles 4 and 5, which are aligned with the axis of the machined part.
Indicates a construction method that matches the That is, as shown in FIG.
Support rods 56 and 57 on which sb, 59a, 59b, 60a, 60b are arranged are connected to the drive coupling 54.
+ 551 = fixedly installed, the prime mover n, 23 is rotated quietly, and the amount of misalignment of the turning spindles 4, 5 (two paired drive couplings 54, 55) is measured.

Here, the y-axis and the Y-axis are dial gauges 58a and 58b.
Read with the y-axis, and the y-axis is the dial gauge 59a.
, 59b is used to read the amount of misalignment. That is, by arranging and rotating the dial gauges in this manner, it is possible to judge not only the y-axis and the center of the Y-axis, but also the axis difference between Y and y and the axis difference between X and X from the readings of dial gauges 58a and 59a. Possible, this is the core of the turning spindle and drive coupling.

This is extremely advantageous because it allows the difference in the y-axis to be measured at the same time.

Next, a method for centering each of these x, y, and z axes will be explained. Fig. 10 (- As shown, the centering of the y-axis and the two axes is done by setting the tension poles on the drive frame 19 while checking the dial gauges 58b and 59b) 61a, 61b...
・・・・・・・・・ Alternately adjust the 8 wires up to 61h to eliminate misalignment. In addition, while checking the dial gauges 58a and 59a for centering the Y-axis and the y-axis, leveling rings 46a, 46b, 46c, which constitute spherical seats, are used.
46d (see Figures 3 and 4) alternately to eliminate misalignment.

Centering is completed by repeating the centering operations in the X and Y directions as described above and confirming that the readings on each dial gauge have become zero or the required minimum value.

That is, each dial gauge 58a, 58b, 59
a, 59b.

If the readings of 60a and 60b become zero or the minimum value, the differences between Y and y and between x and X also become zero or the minimum value, which means that the centering in the Z direction is inevitably completed.

On the other hand, the center of the driving force coupling 55 is determined at the machine factory based on the drive coupling 54 and the axis distance e between the x, y, and z axes.
By performing centering in advance, on-site centering can be saved. Alternatively, centering may be performed on-site using the drive coupling 55 and the turning spindle 5. A presser metal fitting 48 that tightens the drive frame 19 once the core is determined
After final tightening is performed, the drive couplings 54 and 55 are connected to the turning spindles 4 and 5, and the work of centering and fixing the device is completed, and cutting operations are performed one after another.

That is, as shown in FIG. 11, it is necessary to cut a groove on the inner surface 3b of the bearing portion (hatched area G). When performing complex machining, the blade 16 is mounted on the saddle of the cutting mechanism, transmitting rotation and feed in the axial direction (arrow B) to the turning spindle 4, and operating the cutting handle 15 to move the blade 16 in the radial direction (arrow B). C) and perform the desired cutting process one after another to complete.

In addition, when determining the dimensions with high precision in the final finishing process, by placing the dial gauge 62 in contact with the end of the cutter 16 and operating the cutting handle 15 while checking the dial gauge 62, the dimensions can be determined reliably. Able to work efficiently.

According to the portable inner diameter cutting device comprising the blade cutting mechanism, turning spindle centering support mechanism, turning spindle drive mechanism, and feeding mechanism of the present invention, it is possible to: ■ make grooves on the inner surface of the inner diameter of bearing fitting parts, etc. on site; By doing this, the unevenly worn parts can be removed and the sleeve can be fitted to repair it.

■ When replacing the blade, the folding blade can be easily aligned with the original cutting surface.

■ You can drive two cutting spindles at the same time to suit your purpose, allowing efficient cutting.

■ It is now possible to accurately and reliably measure the centering of parallelism, levelness, and center distance, which are the most important factors when machining the inner diameter of reducer bearings.

■ It has excellent effects such as making it possible to perform cutting operations in limited areas by making the device more compact and minimizing the range of obstacle removal on site.

As described above, it has become possible to carry out complex, high-precision machining repairs on-site on the fitting parts of bearings such as reducers in an extremely short period of time, which means that rolling equipment downtime can be significantly reduced and repair personnel can be saved. This can greatly save labor.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing the drive system arrangement of the rolling equipment that is the workpiece, Fig. 2 is an explanatory diagram showing the shape of the binion stand bearing fitting part of the workpiece, and Fig. 3 is an explanatory diagram showing the shape of the bearing fitting part of the workpiece. This is a side view showing the state in which the workpiece is attached to the binion stand.
The figure is a front view of the drive unit and is an explanatory diagram showing the arrangement of the drive mechanism and the transmission method of the feeding mechanism, and FIGS. 5, 6, and 7 are explanatory diagrams showing the configuration of the blade cutting mechanism. 8th. FIG. 9 is an explanatory diagram showing the procedure for centering a binion stand and a turning spindle, which are workpieces. FIG. 10 is an explanatory diagram showing the turning spindle and the centering procedure of the drive unit. FIG. 11 is an explanatory diagram showing the groove cutting process and dimension determination on the inner surface of the bearing fitting part. 1... Main reduction gear, 2... Binion stand,
3... Bearing fitting part, 4, 5... Turning spindle,
6...Key, 7...Knife holder, 8...Notch body, 9...-saddle, 10.28.29...
・Female thread, 11, 30.31...-Lead screw, 12
...Interlocking shaft, 13.14...Gear, 15...Handle, 16...Cutter, 17...Eccentric cam, 18.
...Tension bolt, 19...Drive frame, 20.21.
...Bed, n1%...Motor, 24.25...
・Cutting thrust receiver, 26.27...double saddle,
34-37...Gear, Seki, 39...Chain, 40
．． 41... Saddle, 45... Workpiece, 50.5
2.53...Level, 58-60...Dial gauge Fig. 5 Fig. 6 Rod Fig. 7 S\9 Fig. 10 Fig. 22 Fig. 11

Claims (1)

[Claims] A portable cutting device that performs cutting at the installation position of a workpiece, in which a turning spindle inserted into the inner diameter part to be cut is connected to a one-rotation drive mechanism at one end, and the outer circumference of the turning spindle is connected to a one-rotation drive mechanism. A cutter is held at the end of a cutter holder provided at the end of the cutter so as to be able to move forward and backward, and a telescoping mechanism is attached to the outer periphery of the spindle for adjusting the centering of the turning spindle in the radial direction and fixing it to the inner diameter part. A portable inner diameter cutting device, characterized in that a saddle equipped with a rotational drive mechanism for the turning spindle is movable on a base (in the spindle axis direction and in a direction perpendicular to the spindle axis direction).