KR101535745B1 - Tool rotation supporting apparatus for working crank bore - Google Patents

Abstract

The present invention relates to a tool rotation support apparatus for working a crank bore, which increase productivity by cleaning the inside of a rotational bush to ensure safety of an operator and maintain continuity of working a crank bore, and can realize the high quality of a cylinder block through processing the high accuracy of a crank bore. A tool rotation support apparatus for working a crank bore, wherein an end is mounted on a spindle to rotate and support the other end processing a crank bore of a cylinder block, comprises: a frame; a housing fixedly installed in a longitudinal direction of the frame; a rotational bush which is a cylindrical shape to be rotationally installed inside the housing with a medium of a bearing, wherein the other end of the tool for working a bore is inserted into the front for the other end of the tool for working a bore to be rotationally supported; an injection nozzle installed in the rear of the rotational bush by penetrating a rear end of the housing, wherein a plurality of injection ports are formed to an inner circumferential surface of the rotational bush; and a fluid supply unit supplying a fluid to the injection nozzle for a fluid to be injected from the injection ports of the injection nozzle.

Description

Technical Field [0001] The present invention relates to a tool for rotating a tool for crank bore machining,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a rotary support apparatus for a crank bore for use in machining a crank bore of a cylinder block constituting a framework of an engine body.

A cylinder block, commonly referred to as a crankcase or engine block, is an integral part of a combustion engine or internal combustion engine, such as is used in, for example, passenger cars, trucks, aircraft or ships. The most widely used design is a multi-cylinder engine design, in which the piston of the engine is connected to the crankshaft by a connecting rod, which transmits the power generated by the engine to the wheel, propeller, generator,

The crankshaft is placed under the cylinder in the case of an in-line or V-type engine, between cylinders in the case of a countercylinder engine, and the crankshaft is rotatably supported via a crankshaft bearing in the crank bore of the cylinder block. These crankshafts must have a high degree of concentricity and meet high dimensional tolerance requirements in order to minimize the effects of unwanted wear and vibration during operation, as is the crank bore on which the crankshaft is supported.

Thus, the shape, size, and surface shape of the crank bore determine the output and efficiency of the combustion engine as a result of wear, friction, and oil consumption and emissions values of the combustion engine. In addition, the exact position of the crankshaft relative to the piston or crank bore is important to reduce wear of the engine parts under high load.

In this respect, crank bore machining of cylinder blocks requires high precision machining because of dimensional and positional tolerances in the micrometer range. That is, irregularities to the crank bores caused by casting of the cylinder block require a relatively large amount of material to be removed, which is cut and honed by a tool for crank bore machining.

As for the tool for crank bore machining, a "boring tool of a cylinder block for preventing the adhesion of a cylinder block" of the prior art publication No. 10-2001-0029204 and a "tool for machining the crank bore of a cylinder block" of the registered patent publication No. 10-0634619 have been disclosed A detailed description of the configuration and functions thereof will be omitted.

The process of machining the crank bores of the cylinder block using the tool for crank bore machining is as shown in Fig. That is, the cylinder block 1 is fixed to a fixed chuck (not shown) in the machining center, one end of the bore machining tool 10 is mounted on the spindle 20, and the other end of the bore machining tool 10 is fixed to the cylinder The crank bore 2 is machined by the rotation of the spindle 20 through the crank bore 2 of the block 1.

However, if the other end of the elongated bore processing tool 10 is a free end, the size and the positional tolerance of the crank bore 2 are in the micrometer range. It will be difficult to process and adversely affect the quality.

Therefore, as shown in Figs. 2 to 4, there is provided a rotation support device 30 for a tool for crank bore machining, in which the other end of the bore machining tool 10 is inserted and rotatably supports the bore machining tool 10. 2 to 4, a rotation supporting device 30 of a tool for crank bore machining according to the related art includes a frame 31, a housing 32 fixed to the frame 31, And a rotary bush 33 (not shown) which is rotatably installed inside the bore 32 through a bearing B and into which the other end of the bore machining tool 10 is inserted and rotatably supports the other end of the bore machining tool 10 ).

One end of the bore machining tool 10 is mounted on the spindle 20 through the rotation support device 30 of the tool for crank bore machining and the other end is inserted into the rotary bush 33 and is rotationally supported thereby to rotate the bore machining tool 10 Can precisely process the crank bore 2 of the cylinder block 1 without vibrating in the coaxial phase.

However, even in the case of the rotation support device 30 of the tool for crank bore machining according to the related art as described above, the cutting dust and chips blown into the inside of the rotary bush 33 after machining of the crank bore 2 are forced to flow , There is a problem that the bore processing tool 10 inserted into the rotary bush 33 due to the inflow of such dust or chips tends to be slightly twisted from the axial line.

Of course, although the interior of the rotary bush 33 of the rotary support device 30 of the crank bore machining tool is manually cleaned, it is very cumbersome for the operator to carry the cleaner by holding the air gun or the water gun every time, It is not only difficult to clean it, it is dangerous for safety, and the continuity of the work is broken, and the productivity is inevitably lowered.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and it is an object of the present invention to solve the above-mentioned problems and to provide a crank bore Which is capable of realizing a cylinder block of high quality through the use of a rotary shaft.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments with reference to the accompanying drawings.

In order to achieve the above object, a rotation support device for a tool for crank bore machining according to the present invention comprises a tool for crank bore machining, which is rotatably supported on one end of a bore machining tool mounted on a spindle for machining a crank bore of a cylinder block A rotary support apparatus comprising: a frame; a housing fixedly secured to the frame along a longitudinal direction of the frame; a housing provided in a cylindrical shape so as to be rotatable through a bearing in the housing, the other end of the bore processing tool A spray nozzle having a plurality of injection holes formed in a rear portion of the rotary bushing to penetrate a rear end of the housing and face the inner circumferential surface of the rotary bush; And a fluid supply unit for supplying fluid to the injection nozzle so as to inject fluid from the injection port of the injection nozzle Than it has done.

The rotation support device of a tool for crank bore machining which rotatably supports the other end of a bore machining tool which is once mounted on a spindle and processes a crank bore of a cylinder block, And a housing having a cylinder coupling hole penetratingly formed at a rear end of the bore forming tool. The housing is rotatably installed in the housing through a bearing, and the other end of the bore forming tool is inserted into the front interior, A double-acting cylinder fixedly installed along the longitudinal direction of the cylinder behind the cylinder coupling hole of the housing; a cylinder rod provided in the inside of the double-acting cylinder so as to be movable back and forth, , The cylinder rod is moved rearwardly so as to be positioned inside the rear portion of the rotary bushing A spray nozzle coupled to a front end of the rotary shaft and having a plurality of ejection openings formed so as to face the inner circumferential surface of the rotary bush; a fluid supply unit coupled to a rear end of the cylinder rod for supplying a fluid to the spray nozzle through a hollow interior of the cylinder rod ≪ / RTI >

The rotation support device of a tool for crank bore machining which rotatably supports the other end of a bore machining tool which is once mounted on a spindle and processes a crank bore of a cylinder block, And a housing having a cylinder coupling hole penetratingly formed at a rear end of the bore forming tool. The housing is rotatably installed in the housing through a bearing, and the other end of the bore forming tool is inserted into the front interior, A double-acting cylinder fixedly installed along the longitudinal direction of the cylinder behind the cylinder coupling hole of the housing; a cylinder rod provided in the inside of the double-acting cylinder so as to be movable back and forth, , The cylinder rod is rotatable through a bearing so as to move back and forth together with the cylinder rod A fluid transfer tube supported and rearwardly opened at its front and rear ends and coupled to the front end of the fluid transfer tube so as to be located inside the rear of the rotary bush in a state in which the cylinder rod is moved rearward, And a fluid supply unit coupled to a rear end of the fluid transfer pipe and supplying fluid to the injection nozzle through a hollow interior of the fluid transfer pipe.

The fluid supply unit may selectively supply compressed air or washing water to the injection nozzle.

A rotary guide plate fixed to the rear of the double acting cylinder along the longitudinal direction of the double row and having an elongated plate shape having an arc shape and formed with a helical rail hole along the longitudinal direction, And a track roller coupled to the guide bracket and operated to rotate along a rail hole of the rotation guide plate.

The rotating support device of the tool for crank bore machining according to the present invention can maintain the continuity of the crank bore machining operation while improving the safety of the operator by automatically cleaning the inside of the rotary bush through the injection nozzle and the fluid supply part, High-quality cylinder block can be realized by high precision crank bore machining.

Further, the injection nozzle can be moved back and forth inside the rotary bush through the double acting cylinder and the cylinder rod, so that the fluid ejected from the injection nozzle can clean the inside of the rotary bush more cleanly.

Particularly, the cleaning water and the compressed air can be selectively injected from the injection nozzle to further enhance the convenience. Further, in addition to the fluid transfer pipe rotatably installed in the cylinder rod, It is possible to rotate at the same time as the movement, so that the cleanliness of the interior of the rotary bush can be further maintained.

1 is a side sectional view showing a process of machining a crank bore of a cylinder block with a general crank bore machining tool,
2 is a perspective view showing a rotating support device of a tool for crank bore machining according to the prior art,
3 is a side sectional view showing a process of machining a crank bore of a cylinder block with a tool for crank bore machining using the embodiment of Fig. 2,
Figure 4 is a side cross-sectional view of the embodiment of Figure 2,
5 is a perspective view showing a first embodiment of a rotation support device for a tool for crank bore machining according to the present invention,
Figure 6 is a side cross-sectional view of the embodiment of Figure 5,
7 is a side cross-sectional view illustrating an operation process of the embodiment of FIG. 5,
8 is a perspective view showing a second embodiment of a rotation support device for a tool for crank bore machining according to the present invention,
9 and 10 are side cross-sectional views illustrating the operation of the embodiment of FIG. 8,
11 is a perspective view showing a third embodiment of a rotation support device for a tool for crank bore machining according to the present invention,
Figs. 12 and 13 are side cross-sectional views illustrating the operation of the embodiment of Fig. 11,
FIG. 14 is an exploded perspective view of the embodiment of FIG. 11,
15 is a perspective view showing a fourth embodiment of a rotation support device for a tool for crank bore machining according to the present invention,
Figs. 16 and 17 are side cross-sectional views illustrating the operation of the embodiment of Fig. 15,
18 is an exploded perspective view of the embodiment of Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, a preferred embodiment of a rotation support device for a tool for crank bore machining according to the present invention will be described in detail with reference to the accompanying drawings.

1 and 3, the crank bore 2 of the cast cylinder block 1 is cut and honed by a bore machining tool 10. One end of the bore machining tool 10 is connected to a spindle 20 The other end of the bore machining tool 10 is passed through the crank bore 2 of the cylinder block 1 and the crank bore 2 is machined by the rotation of the spindle 20. [ At this time, the other end of the bore machining tool 10 mounted on the spindle 20 for machining the crank bore 2 of the cylinder block 1 rotates and supports the rotating support of the crank bore machining tool according to the present invention Device.

The first and second embodiments of the rotation support device for a tool for crank bore machining according to the present invention include a frame 100, a housing 200, a rotary bush 300, an injection nozzle 400 And a fluid supply unit 500.

The frame 100 may be fixed to the inside of the machining center or may be installed so as to be movable back and forth with respect to the spindle 20, As shown in Fig. However, when the crank bore 2 is to be machined, the frame 100 should be positioned so as to face the spindle 20.

The housing (200) is fixed to the frame (100) along the longitudinal direction. The housing 200 is configured to rotate and support the rotary bush 300 via the bearing B in relation to the rotary bush 300 to be described later and at the same time the injection nozzle 400 and the fluid supply unit 500 .

5 and 6, the rotary bush 300 has a cylindrical shape and is rotatably installed in the housing 200 through a bearing B, And the other end is inserted and rotatably supported at the other end of the bore machining tool 10. One end of the bore processing tool 10 is mounted on the spindle 20 and the other end is inserted and rotatably supported on the rotary bushing 300 so that the bore processing tool 10 is mounted on the cylinder block 1 The crank bore 2 can be precisely machined.

Since dust or chips cut from the crank bore 2 processed by the bore machining tool 10 are forced to flow into the rotary bush 300, the dust, chips, etc., An injection nozzle 400 and a fluid supply unit 500 described below are provided so as to be automatically and conveniently removed.

4 to 6, the injection nozzle 400 is installed inside the rear portion of the rotary bush 300 through the rear end of the housing 200, and has a plurality of The injection port 410 is formed. The fluid supply unit 500 supplies the fluid to the injection nozzle 400 so that the fluid is injected from the injection port 410 of the injection nozzle 400. That is, when the fluid is supplied to the injection nozzle 400 by the fluid supply unit 500, the fluid is injected through the injection port 410 of the injection nozzle 400, so that dust, chips, Is removed by being swept away by the injected fluid.

The injection port 410 of the injection nozzle 400 is formed such that the direction of the injected fluid is directed toward the inner circumferential surface of the rotary bush 300 but is inclined forwardly and the plurality of injection holes 410 are formed in the axial center of the injection nozzle 400 As shown in Fig. In addition, the fluid supply unit 500 may be a simple nipple, and may include an opening / closing valve or a flow rate control valve, though not shown in the drawing. The fluid supplied to the injection nozzle 400 may be a gas Or a liquid such as washing water.

However, the fluid supply unit 500 may selectively supply compressed air or washing water to the injection nozzle 400, as shown in FIGS. 9, the cleaning water is first supplied to the injection nozzle 400, and the washing water is supplied to the rotary bush 300, The cleaning water remaining inside the rotary bush 300 may be cleaned out to the outside of the rotary bush 300 by supplying the compressed air to the injection nozzle 400 sequentially as shown in FIG. 10 will be.

As described above, according to the first and second embodiments of the rotation support device for a tool for crank bore machining according to the present invention, the inside of the rotary bush 300 is automatically opened through the injection nozzle 400 and the fluid supply part 500 It is possible to maintain the continuity of the crank bore 2 while ensuring the safety of the operator, thereby improving the productivity and realizing the high-quality cylinder block 1 through the high-precision crank bore 2 processing.

Although the cleaning of the interior of the rotary bush 300 is performed through the first and second embodiments described above, a third embodiment of a rotation support device for a tool for crank bore machining according to the present invention will be described in order to improve cleaning efficiency , Redundant description of the above-mentioned contents will be omitted.

In other words, the third embodiment of the rotation support device of the tool for crank bore machining according to the present invention includes the frame 100, the housing 200, the rotary bush 300, the injection nozzle 400, A fluid supply unit 500, and a double-acting cylinder 600 and a cylinder rod 700. The main features of the third embodiment differ from those of the first and second embodiments.

First, the housing 200 has a cylinder coupling hole 210 formed at its rear end. As shown in FIG. 12, the cylinder coupling hole 210 is coupled to the double acting cylinder 600 described later. 13, the cylinder rod 700 moving forward and rearward in the double acting cylinder 600 passes through the cylinder fitting hole 210 to pass through the rear end of the housing 200 and into the inside of the housing 200 .

Second, as shown in FIGS. 11 and 12, the double acting cylinder 600 is fixed to the rear of the cylinder coupling hole 210 of the housing 200 along the longitudinal direction. In addition, the cylinder rod 700 is installed inside the double acting cylinder 600 so as to be movable back and forth, and its front and rear ends are opened to have a hollow interior. The double acting cylinder 600 is a cylinder which can reciprocate the cylinder rod 700 as it is called, and is fixed to the rear of the cylinder coupling hole 210 of the housing 200. The cylinder rod 700 has a hollow interior with open front and rear ends, and the hollow interior functions as a passage through which the fluid supplied from the fluid supply part 500, which will be described later, passes.

12 to 14, the injection nozzle 400 is disposed at the front end of the scraper cylinder rod 700 so as to be located inside the rear portion of the rotary bush 300 in a state in which the cylinder rod 700 is moved rearward . The fluid supply part 500 is coupled to the rear end of the cylinder rod 700 and supplies the fluid to the injection nozzle 400 through the hollow interior of the cylinder rod 700.

Therefore, as shown in FIGS. 11 to 14, the double acting cylinder 600 is fixed to the rear of the housing 200, and the cylinder rod 700 moves forward and backward with respect to the double acting cylinder 600. Since the injection nozzle 400 is coupled to the front end of the cylinder rod 700 and the fluid supply part 500 is coupled to the rear end of the cylinder rod 700, the injection nozzle 400, (500) is also turned back and forth. When the injection nozzle 400 is advanced together with the cylinder rod 700, the injected fluid is also sprayed toward the inner circumferential surface from the rear to the front of the rotary bushing 300, so that the inside of the rotary bushing 300 can be more cleanly cleaned will be.

As described above, according to the third embodiment of the rotation support device for a tool for crank bore machining according to the present invention, the injection nozzle 400 is moved back and forth inside the rotary bush 300 through the double acting cylinder 600 and the cylinder rod 700 The fluid injected from the injection nozzle 400 can clean the inside of the rotary bushing 300 more cleanly.

Although the cleaning of the inside of the rotary bush 300 is performed through the third embodiment, in order to further maximize the efficiency of cleaning, a fourth embodiment of a rotation support apparatus for a crank bore processing tool according to the present invention will be described, A duplicate description of the above-mentioned contents will be omitted.

That is, a fourth embodiment of a rotation support apparatus for a tool for crank bore machining according to the present invention includes a frame 100, a housing 200, a rotary bush 300, an injection nozzle 400, A fluid supply unit 500, a double acting cylinder 600, and a cylinder rod 700. The fluid delivery unit 500 includes a fluid passage (not shown) Further, it may further include a rotation guide plate 900, a guide bracket 910, and a track roller 930.

The frame 100 has the same structure, and the housing 200 is fixed to the frame 100 along the longitudinal direction, and the cylinder coupling hole 210 is formed at the rear end thereof. The rotary bush 300 has a cylindrical shape and is rotatably installed in the housing 200 through a bearing B, and the other end of the bore machining tool 10 is inserted into the front interior of the rotary bush 300, The other end of the tool 10 is rotatably supported. The double acting cylinder 600 is fixed to the rear of the cylinder coupling hole 210 of the housing 200 along the longitudinal direction and the cylinder rod 700 is installed in the double acting cylinder 600 so as to be movable back and forth , And the front and rear ends are open to have a hollow interior.

17, the injection nozzle 400 described later is moved up and down along with the forward and backward movement of the cylinder rod 700, so that the fluid to be injected is directed to the inner peripheral surface of the rotary bush 300 So as to further facilitate the removal of adhered foreign matter by applying a larger impact force. For this purpose, the fourth embodiment of the present invention is different from the third embodiment in that a separate fluid transfer pipe 800 is required as shown in FIGS. 15 to 18, and the injection nozzle 400 and the fluid supply part 500 The binding positions are also different.

That is, the fluid transportation pipe 800 is rotatably supported in the cylinder rod 700 through the bearings B so as to move back and forth together with the cylinder rod 700, and the front and rear ends thereof are opened, I have. In addition, the injection nozzle 400 is coupled to the front end of the fluid transfer pipe 800, the fluid supply part 500 is coupled to the rear end of the fluid transfer pipe 800, and through the hollow interior of the fluid transfer pipe 800 And supplies the fluid to the injection nozzle 400.

Therefore, as shown in FIGS. 15 to 18, when the cylinder rod 700 moves back and forth with respect to the double-acting cylinder 600, the fluid transfer tube 800 also moves back and forth together with the cylinder rod 700. However, the fluid transportation pipe 800 is rotatable through the bearing B with respect to the cylinder rod 700. Since the injection nozzle 400 is coupled to the front end of the fluid transfer pipe 800 and the fluid supply unit 500 is coupled to the rear end of the fluid transfer pipe 800, the injection nozzle 400, The fluid transportation pipe 800, the injection nozzle 400, and the fluid supply part 500 together with the cylinder rod 700 are made to be movable back and forth with respect to the cylinder rod 700. As a result, the injection nozzle 400 advances together with the fluid transfer tube 800 by the advancement of the cylinder rod 700 and rotates together with the fluid transfer tube 800 on the basis of the cylinder rod 700.

A motor-gear structure or a motor-belt pulley structure or the like is provided at the rear end of the fluid transportation pipe 800 as a separate power transmission means in order to rotate the fluid transportation pipe 800 and the injection nozzle 400 on the basis of the cylinder rod 700 . In addition, if the fluid injection direction of the injection port 410 formed in the injection nozzle 400 is made eccentric, it can be implemented as a self-rotatable moment according to the injection force of the fluid. However, if continuous rotation occurs only in one direction, the fluid transfer line connected to the fluid supply part 500 may be twisted, so that it is preferable to rotate the fluid in a normal direction by a predetermined angle.

For this, the injection nozzle 400 can be rotated in the normal or angular range within a predetermined angle range by mechanically rotating the fluid transfer tube 800 in the forward and backward directions of the cylinder rod 700 without a separate power source. In other words, as shown in FIGS. 15 to 18, it can be simply implemented through the rotation guide plate 910, the guide bracket 920, and the track roller 930.

The rotation guide plate 910 is fixed to the rear of the double-acting cylinder 600 along the longitudinal direction, and is formed into an elongated plate having an arc shape, and a rail hole 911 having a helical shape along the longitudinal direction is formed. The reason why the rotation guide plate 910 is fixed to the rear of the double acting cylinder 600 is that the rear end of the cylinder rod 700 moves forward and backward from the rear of the double acting cylinder 600. At this time, the rail hole 911 formed in the rotation guide plate 910 has a spiral shape, because the rotation guide plate 910 is a long plate shape having an arc shape. The guide bracket 920 is coupled between the rear end of the fluid delivery pipe 800 and the fluid supply unit 800 and rotates together with the fluid delivery pipe 800. Therefore, the guide bracket 920 rotates about the axial direction while moving forward and backward together with the fluid transfer pipe 800. At this time, the track roller 930 is coupled to the guide bracket 920 and operates in a rolling manner along the rail hole 911 of the rotation guide plate 910. The track roller 930 coupled with the guide bracket 920 is brought back and forth together with the guide bracket 920 and the track roller 930 is rotated in a rolling manner along the helical rail hole 911 of the rotation guide plate 910 The guide bracket 920 rotates forward and backward in the normal and reverse directions by an angle formed by the rail hole 911 in the rotation guide plate 910. [ When the guide bracket 920 rotates forward and backward, the fluid transfer tube 800 rotates forward and backward, and the injection nozzle 400 coupled to the front end of the fluid transfer tube 800 also rotates forward and backward It will rotate.

As described above, according to the fourth embodiment of the rotation support device for a tool for crank bore machining according to the present invention, a rotary guide plate 910, a guide bracket 910, The rotation of the injection nozzle 400 can be performed simultaneously with the forward and backward movement of the injection nozzle 400 through the guide roller 920 and the track roller 930 so that the cleanliness of the inside of the rotation bushing 400 can be further maintained.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the scope of the present invention as long as they are obvious to those skilled in the art.

B: Bearing
10: bore machining tool
100: frame
200: housing 210: cylinder coupling hole
300: rotating bush
400: jet nozzle 410: jet nozzle
500: fluid supply part
600: double acting cylinder
700: Cylinder rod
800: fluid conduit
910: rotation guide plate 911: rail hole
920: Guide bracket
930: Track rollers

Claims (5)

A rotation support device for a tool for crank bore machining which rotatably supports the other end of a bore machining tool which is once mounted on a spindle and which processes crank bores of a cylinder block,
Frame,
A housing fixedly installed along the longitudinal direction of the frame and having a cylinder coupling hole penetrating the rear end thereof,
A rotary bush installed to be rotatable through a bearing in the inside of the housing in a cylindrical shape and having the other end of the bore machining tool inserted into the front inside to rotatably support the other end of the bore machining tool;
A double-acting cylinder fixed to the housing behind the cylinder coupling hole along the longitudinal direction of the cylinder;
A cylinder rod provided inside the double acting cylinder so as to be movable forward and backward and having front and rear ends open and hollow inside;
An injection nozzle coupled to a front end of the cylinder rod so as to be positioned inside the rear of the rotary bush while the cylinder rod is moved backward and having a plurality of injection openings facing the inner circumferential surface of the rotary bush;
And a fluid supply unit coupled to a rear end of the cylinder rod and supplying fluid to the injection nozzle through a hollow interior of the cylinder rod.
A rotation support device for a tool for crank bore machining which rotatably supports the other end of a bore machining tool which is once mounted on a spindle and which processes crank bores of a cylinder block,
Frame,
A housing fixedly installed along the longitudinal direction of the frame and having a cylinder coupling hole penetrating the rear end thereof,
A rotary bush installed to be rotatable through a bearing in the inside of the housing in a cylindrical shape and having the other end of the bore machining tool inserted into the front inside to rotatably support the other end of the bore machining tool;
A double-acting cylinder fixed to the housing behind the cylinder coupling hole along the longitudinal direction of the cylinder;
A cylinder rod provided inside the double acting cylinder so as to be movable forward and backward and having front and rear ends open and hollow inside;
A fluid transfer pipe supported inside the cylinder rod so as to be movable back and forth together with the cylinder rod via a bearing and having front and rear ends open,
A spray nozzle coupled to a front end of the fluid delivery pipe so as to be located inside the rear of the rotary bush while the cylinder rod is moved rearward and having a plurality of injection openings facing the inner circumferential surface of the rotary bush;
And a fluid supply unit coupled to a rear end of the fluid delivery pipe and supplying fluid to the injection nozzle through a hollow interior of the fluid delivery pipe.
3. The method according to claim 1 or 2,
Wherein the fluid supply portion includes:
Wherein the compressed air or washing water is selectively supplied to the injection nozzle.
3. The method of claim 2,
A rotation guide plate fixedly installed along the front and rear longitudinal direction to the rear of the double acting cylinder and having an elongated plate having an arc shape and formed with helical rail holes along the longitudinal direction,
A guide bracket coupled between a rear end of the fluid delivery pipe and the fluid supply unit and rotated together with the fluid delivery pipe,
And a track roller coupled to the guide bracket and operated to roll along a rail hole of the rotation guide plate. delete

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