JPS60161013A - Grinding device of internal surface groove in cylindrical structure - Google Patents

Abstract

PURPOSE:To enable an air grinder by its revolution around a hollow shaft to efficiently grind an internal surface groove, by supporting the hollow shaft, which mounts a cam and the air grinder, to the axial center part of a cylindrical structure of cylinder liner or the like in large diameter through a mounting bed. CONSTITUTION:When the internal surface groove of a cylinder liner 1 in large diameter is ground, first a mounting bed 2, constituted by providing four arms 2c around a cylindrical supporter 2b, is coaxially mounted to the liner 1, and then a hollow shaft 5 is laterally moved to be adjusted by turning a pinion 6. The hollow shaft 5 mounts to the periphery of its intermediate part a ring-shaped cam 21 through a mounting fixture 8 while a cutter head mounting bed 10 rotatably neighboring to this mounting fixture 8. Then an air grinder mounting bed 23 integrally formed with this mounting bed 10 fixes an air grinder 27 mounting an end mill 24, and the mounting bed 10 is rotated by driving a motor 13 through gear trains 14, 15 and 17-19 or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for machining inner grooves of a cylindrical body.

For example, when machining an oil groove in a cylinder liner 101 as shown in FIG. 5, a worker gets into the narrow A cylinder liner 101, and the machining is performed using a manual tool 127 in an unnatural posture. In this way, workers are forced to work in unnatural postures, which increases worker fatigue and reduces work efficiency.Furthermore, dust, chips, etc. are scattered around, making the work environment more difficult. The problem was that it was bad.

In addition, when the above-mentioned cylinder liner is machined using 9 cutting machines across the width, it takes time to adjust the position of the cylinder liner with respect to the main shaft of the machine, and there is also the problem that the main shaft lacks rigidity due to the large length of the main shaft. occurs. Therefore, it is necessary to support the tip of the spindle, and in that case, it takes a lot of effort to adjust the centering of the machine spindle, cylinder liner, and supporter, and it is almost impossible to visually check the cutting condition inside the cylinder liner. It's possible.

The present invention has been made to effectively solve the above problems.
The object of the present invention is to provide an apparatus for machining internal grooves of a cylindrical body, which is capable of cutting automatically and with high precision.

In order to achieve such an object, the present invention provides a pedestal in which a plurality of cylindrical supports are orthogonally combined with a plurality of arms, and a hollow pedestal coaxially and slidably inserted into the supporter of the pedestal. a shaft, a rotating shaft disposed coaxially within the hollow shaft, a rotational drive means for the rotating shaft fixedly installed at the rear end of the hollow shaft, and a fitting provided at an intermediate portion of the hollow shaft. The device of the present invention is characterized in that it is constituted by a ring-shaped cam fixed to the rotary shaft, and an air grinder that is rotatably attached to the tip of the hollow shaft and interlocks with the rotary shaft.

A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

Figure 1 is a vertical sectional side view of the device of the present invention, and Figure 2 is the same as Figure 1 -
■An arrow view, Figure 3 is a broken sectional view of the air grinder attachment part of the device, Figure 4 is a sectional view taken along the line ■-■ in Figure 3, and Figure 6 (a).
is a side view of the cam (for intermittent oil grooves), Figure 6 (b) is an exploded view of the same cam, Figure 7' (IL) is a side view of the cam (for continuous oil grooves), Figure 7 (b) 8 is a developed view of the same cam, and FIG. 8 is an enlarged sectional view taken along the line 1--2 in FIG.

In FIG. 1, 1 is a cylinder liner which is a cylindrical body,
Reference numeral 2 denotes a pedestal for the present apparatus, and as shown in FIG. 2, this pedestal 2 is constructed by combining four arms 2c and a cylindrical supporter 2b orthogonally to each other. A cylindrical hollow shaft 5 is coaxially and slidably inserted into the supporter 2b, and a rank 5a is carved on a part of the outer circumference of the rack 5.
A pinion 6 is meshed with a.

A rotary shaft 16 is rotatably inserted and held inside the hollow shaft 5, and a worm gear 15 is fixed to the rear end of the rotary shaft 16. It meshes with a worm 14 fixed to the output shaft of a drive motor 1.3' fixed to the rear end. A ring-shaped cam (template) 21 is attached to the outer periphery of the intermediate portion near the tip of the hollow shaft 5 via a cam fitting 8, and a clamp is attached to the cam fitting 8 as shown in FIG. A bolt 33 and index notch 32 are attached. Further, a cutter head mount 10 is rotatably attached to the outer periphery of the tip of the hollow shaft 5 at a position adjacent to the cam mount 8, and thrust bearings 9 are attached to both sides of the cutter head mount 100. There is.

The cam mount 8 and the cutter head mount 10 are fixed by being screwed into the outer periphery of the hollow shaft 5 by a nut 7.12.

By the way, an air grinder 27 for groove machining is fixed to the air grinder mount 23 connected to the protrusion of the cutter head mount 10, and the air grinder mount 23 has a row 222 attached to the side thereof. It is configured to follow the cam surface of the cam 21 via the cam surface. Further, an end mill 24 is attached to the air grinder 27, and the air grinder mounting base 23 has a cutting base for moving the air grinder 27 back and forth using a cutting screw 25, as shown in FIG. 24 is included.

On the other hand, a spur gear 17 is fixed to the tip of the rotating shaft 16, and a bracket 2 is attached to the spur gear 18 that meshes with the spur gear 17.
The pinion 19 attached through the cutter head mount 10 meshes with a spur gear 10a provided on the outer peripheral surface of the cutter head mount 10.

In FIG. 1, 5b is a gear box attached to the rear end of the hollow shaft 5, 2d is a support plate that connects the guide portion 2a of the pedestal 2 and the supporter 2b, and 35 and 36 are the supporter 2.
(b), 3.4 are the mounts 2' (i-clamps, bolts, 1 for fixing to the end face of the cylinder liner 1,
a is the collar of the cylinder liner 1. 4, reference numeral 26 denotes a spring for smoothing the tracing movement of the roller 22 relative to the cam 21, which is interposed between the grinder mounting base 23 and the cutter head mounting base 10 as shown in the figure. , the spring load can be adjusted by means of the screw member 28. Furthermore, in FIG. 4, 30 is the cutting table 29.
This is a screw for fixing the grinder to the grinder mounting base 23.

By the way, FIGS. 6 and 7 show the shape of the ring-shaped cam 21, and in FIG. 6, the oil groove is not continuous around the circumference,
Fig. 7 shows a shape in which the oil groove is continuous. Thus, the continuous groove machining on the inner surface of the cylinder 2 inner 1 is completed by one revolution of the cutter head mounting base lO, but it is carried out while stopping the row 222 with the interrupted groove machining line and the cam stopper. , this is the sixth
This is accomplished by activating the limit switch 38 shown in Figure (b), sending a feed (rotation of the cutter head mount 10) signal to the drive motor 13, and stopping the feed. Then, after machining of one of the interrupted grooves is completed, the cam mounting base 8 is indexed. In this case, after loosening the clamp bolt 33 and aligning the notch 32 with the next hole position, it is necessary to clamp with the clamp bolt 33 and at the same time turn the cutter head mounting base 10.
In that case, the spur gear 18' must be moved in parallel to completely release its mesh with the spur gear 17.

Next, the operation of the device of the present invention will be explained.

First, the frame 2 is attached coaxially to the cylinder liner 1, and then, in order to determine the longitudinal position of the cylinder liner 1 of the end mill 24, the pinion 6 is turned to move the hollow shaft 5 left and right as shown in Fig. 1. do. When the position of the cylinder liner IKJt of the end mill 21 is determined, the clamp bolts 35 and 36 are tightened to clamp the frame 2 and the cylinder liner 1.

Next, check the mounting position of the cam 21, and make sure that the roller 22 is aligned with the cam 2.
The set load of the spring 26 is adjusted by the screw member 28 so that it is pressed against the cam surface of the roller 22 with a predetermined pressure.
Then, the end mill 24 is positioned at the starting point, and the air grinder 27 is driven to rotate the end mill 24'Ii-.

Next, the end mill 24 is cut into the inner circumferential surface of the cylinder liner 1 to a desired depth using the cutting screw 25 shown in FIG. A rotating shaft 16 is rotationally driven via a worm gear 15. This rotation of the rotating shaft 16 causes the spur gear 17.1 to
8 rotates, and the rotation of the spur gear 18 causes the pinion 19 to rotate.
The pinion 19 turns a gear 10a provided on the outer periphery of the cutter head mount 10, and as a result, the cutter head mount 10 rotates around the hollow shaft 5.

On the other hand, the roller 2 attached to the clinder handle base 23
2 is always pressed against the cam surface of the cam 21, and therefore,
The rotation of the cutter head mounting base 10 causes the roller 22 to rotate following the cam shape of the cam 21. At the same time, the grinder mounting base 23 also rotates and moves in the axial direction by the lift of the cam 21, and the end mill 24 performs the required groove processing on the inner surface of the cylinder liner 1 by a synthetic interlocking of the circular movement and the axial movement.

As described above, according to the device of the present invention, the operator can machine the required grooves by simply operating a button on the outside of the cylindrical body, which simplifies the work and prevents the operator from damaging the working environment with dust, chips, etc. There's no way I'll be able to do it. In addition, since the work does not require unnatural postures, worker fatigue is reduced, work efficiency is improved, and the influence of the worker's skill level is small. Processing becomes possible.

[Brief explanation of the drawing]

Figure 1 is a vertical sectional side view of the device of the present invention, and Figure 2 is the same as Figure 1 -
■An arrow view, FIG. 3 is a broken sectional view of the air grinder attachment part of the same device, FIG. 4 is a sectional view taken along the line ■-■ in FIG. Figure 6(a) is a side view of the cam (for intermittent oil grooves), Figure 6(b) is an exploded view of the cam, Figure 7(a) is a side view of the cam (for continuous oil grooves), Figure 6(b) is a side view of the cam (for continuous oil grooves), Figure (b
) is a developed view of the same cam, and FIG. 8 is an enlarged sectional view taken along the line ■-■ in FIG. In the drawing, 1 is a cylinder liner, 2 is a stand, 2b is a supporter, 2c is an arm, 5 is a hollow shaft, 8 is a cam fixture, 13 is a drive motor, 16 is a rotating shaft, 21 is a ring-shaped cam, 27 is a It is Air Gusinda. Patent applicant Mitsubishi Heavy Industries, Ltd.

Claims (1)

[Claims] a pedestal comprising a plurality of cylindrical supports arranged perpendicularly to a plurality of arms;
a hollow shaft slidably inserted therein; a rotary shaft disposed coaxially within the hollow shaft; a rotational drive means for the rotary shaft fixed to a rear end of the hollow shaft; The ring-shaped cam is fixed to the middle part of the shaft via a fitting, and the air grinder is linked to the rotary shaft and rotatably attached to the tip r of the hollow shaft. Features: A device for machining internal grooves on cylindrical bodies.