JP2002011608A - Handy cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small and light handy cutter that can offer quick high- precision finishing at a site. SOLUTION: The handy cutter comprises a cutter body 10 manually longitudinally movable along a reference plane, and a milling cutter 13 supported rotatably and adjustably in the height to the reference plane on the cutter body 10 via a tool rest 11. The tool rest 11 is laterally movably supported on the cutter body 10. The cutter body 10 is movable by virtue of a plurality of longitudinally arranged rollers 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small and lightweight handy cutter capable of processing the inside and outside diameters of a casing of a turbine device or the like and the processing of the tip of a seal fin quickly and by hand.

[0002]

2. Description of the Related Art In a turbine device, a seal ring is provided to seal a gap between an outer periphery of a rotor on which a moving blade is fixed and rotating and an inner periphery of a seal ring at a tip of a stationary blade fixed to a vehicle compartment side. A plurality of seal fins are implanted on the inner peripheral surface. Since the height of the seal fins greatly affects the sealing performance, it is necessary to strictly control the height.
In order to seal a gap between the interior surface of the vehicle compartment and the outer periphery of the seal fin fixed to the body of the rotor, a plurality of seal fins are planted on the interior surface of the vehicle compartment.

Therefore, conventionally, when a new seal fin is to be implanted, the tip of the seal fin is machined by a turning device or the like in a machine shop with the seal fin implanted in the seal ring and the vehicle compartment. At the time of replacement at the time of regular inspection, etc., the finishing work was carried out locally using a small grinder or a file using a vernier caliper or micrometer.

[0004]

Therefore, when newly implanting seal fins, the setup time and machining time of the machine factory take a long time and lack of responsiveness. However, there is a problem that the finishing accuracy varies and the reliability is lacking.

The present invention has been made in view of the above-mentioned prior art, and has as its object to provide a small and lightweight handy cutter capable of performing high-precision finishing quickly on site.

[0006]

A handy cutter according to the present invention for achieving the above object has a cutter body which can be manually moved in the front-rear direction according to a reference plane;
A tool rotatably supported by the cutter body via a tool rest and supported in a height-adjustable manner with respect to the reference plane.

Further, the tool rest is supported by the cutter body so as to be movable in the left-right direction.

Further, the cutter body is movable by a plurality of rollers arranged in the front-rear direction.

[0009] Further, the invention is characterized in that the rollers are provided as a pair of left and right sides, and the mounting positions in the left and right directions are adjustable.

A method of adjusting the height of a seal fin according to the present invention is characterized in that a tip of the seal fin in a turbine device is machined by using the handy cutter.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a method for adjusting the height of a handy cutter and a seal fin according to the present invention.

FIG. 1 is a structural explanatory view of a handy cutter according to an embodiment of the present invention. FIG. 1 (a) is a side view, FIG. 1 (b) is a rear view, and FIG. FIG. 2 is a plan view, FIG. 2 is an exploded perspective view, and FIG. 3 is an explanatory view of a used state (when the height of the seal fin is adjusted).

As shown in FIG. 3, an annular groove 1a is formed on the inner peripheral surface of a seal ring 1 in a steam turbine provided in a power plant, and seal fins 2 are formed in the annular groove 1a.
Protrudes from the inner peripheral surface of the seal ring 1 by a predetermined height so as to be able to seal a gap L between the inner peripheral surface of the seal ring 1 and the outer peripheral surface of the rotor 3.

The tip of the seal fin 2 is finished by a handy cutter 4, and
(A protruding height H with the inner peripheral surface of the seal ring 1 as a reference surface) is adjusted.

FIGS. 1 and 2 show the handy cutter.
As shown in FIG. 3, a housing-shaped cutter body 10, a tool rest 11 slidably supported on the upper surface of the cutter body 10 in the left-right direction, and the reference face via a feed screw mechanism 12 to the tool rest 11 A rotatable milling cutter (tool) 13 supported so as to be adjustable in height is a main member.

The cutter body 10 has a handle portion 14 and a pair of left and right rollers 15 arranged back and forth (for a total of 4 rollers).
). In the illustrated example, a female screw (hole) 1
A roller shaft 17 on which the roller 6 is formed rotatably penetrates through the inside of the cutter body 10, and the roller 15 is fitted to each end of the roller shaft 17 via collars 18a and 18b having different lengths on the right and left. After that, it is prevented from coming off by a bolt 19 screwed into the female screw (hole) 16.

Therefore, by changing the length of the collars 18a and 18b, the mounting position of the roller 15 with respect to the cutter body 10 in the left-right direction can be adjusted.
Also, the left and right sides of the cutter body 10 are provided with storage recesses 20a for the rollers 15 having different depths on the left and right.
20b are respectively formed.

In the tool rest 11, a support plate 22 having a through hole 22a extends rearward of the cutter body 10 from the rear part of the substrate 21 in two stages vertically and is attached to the lower surface of the substrate 21. A (projecting ridge) 23 is slidably fitted in a lateral groove 24 via a jib (wedge) 25 in a dovetail groove 24 formed in a rear portion of the upper surface of the cutter body 10. The jib (wedge) 25 is attached to the cutter body 10 with bolts 30.

A recess 26 is formed in the bottom surface of the dovetail groove 24, and a hexagonal hole 27 accommodated in the recess 26 is formed.
Female screw (nut part) 2 to be screwed with feed screw 27 with a
8 is formed on the lower surface of the dovetail 23. Therefore, by rotating the feed screw 27 with the hexagon wrench 29, the tool rest 11 slides in the left-right direction with respect to the cutter body 10.

The milling cutter 13 includes an L-shaped tube 31.
Is screwed to a shaft end 32 of an impeller (not shown) housed in the horizontal tube portion 31a of the L-shaped tube 31 and supplied with pressurized air from a pressurized air supply source (not shown) supplied through a vertical tube portion 31b of the L-shaped tube 31 The impeller is driven to rotate by being rotated.

The vertical tube portion 31b of the L-shaped tube 31
, The cover 33 of the milling cutter 13 is fitted, and the feed screw 34 of the feed screw mechanism 12 is externally fitted and fixed. A nut 35 screwed to the feed screw 34
Is disposed between the upper and lower support plates 22 of the tool rest 11.

In the drawing, reference numeral 34a denotes a vertical groove for preventing the rotation of the feed screw 34, and reference numeral 36 denotes a set bolt which penetrates through the upper support plate 22 and engages with the vertical groove 34a.

With this configuration, when the height of the seal fins 2 is adjusted (finish finishing) on site (when the seal fins 2 are newly implanted or replaced at the time of regular inspection). First, as shown in FIG. 3, the handy cutter 4 is first set on the inner peripheral surface of the seal ring 1.

At this time, if the side surfaces of the pair of front and rear rollers 15 close to the seal fins 2 are brought into contact with the side surfaces of the seal fins 2, stable running is performed using the side surfaces of the seal fins 2 as guides during the subsequent running.

Next, by operating the hexagon wrench 29, the tool post 1 is moved by the feed screw mechanism of the feed screw 27 and the female screw 28.
1 is moved horizontally (moving rightward in FIG. 3) to position the milling cutter 13 above the seal fins 2.

Next, while supplying the pressurized air from the pressurized air supply source to the L-shaped tube 31 and rotating the milling cutter 13, the nut 35 of the feed screw mechanism 12 is rotated to rotate the milling cutter 13. Is lowered to a predetermined processing position (set height of the seal fin 2), and is positioned by the set bolt 36.

Thereafter, the handy cutter 4 may be manually advanced in the direction of the arrow in FIG.

At this time, the roller 15 and the milling cutter 1
Since the positional relationship with the seal fin 3 in the vertical direction is not changed, the handy cutter 4 performs a process on the tip of the seal fin 2 with the inner peripheral surface of the seal ring 1 as a reference surface.

As a result, the height of the seal fins 2 can be quickly adjusted by machining and precisely adjusted by following the entire circumference.

The use of the handy cutter 4 makes it possible to adjust the height of the seal fins 2 on site, so that when the seal fins 2 are newly planted or replaced during regular inspections, etc. Responsive and very convenient.

Since the handy cutter 4 is small and lightweight, it is convenient to carry.

It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the spirit of the present invention. For example, by replacing the milling cutter 13 with a diamond grindstone or the like, the end face (plane)
Can also be processed. Further, the cutter body 10 may be simply slid along the reference plane without using the roller 15. Further, the milling cutter 13 may be rotationally driven by other means instead of pressurized air.

[0033]

As described above in detail based on the embodiments, the invention according to claim 1 of the present invention comprises a cutter body which can be manually moved in the front-rear direction according to a reference plane,
A tool rotatably supported by the cutter body via a tool rest and supported in a height-adjustable manner with respect to the reference surface, so that high-precision finishing can be quickly performed on site. A compact and lightweight handy cutter that can be provided can be provided.

The invention according to a second aspect of the present invention is characterized in that the tool post is supported by the cutter body so as to be movable in the left-right direction, so that the alignment between the tool and the processing surface is easy. Become.

The invention according to claim 3 of the present invention is characterized in that the cutter main body is movable by a plurality of rollers arranged in the front-rear direction, so that the cutter body can smoothly run along the reference plane. Becomes

The invention according to a fourth aspect of the present invention is characterized in that the rollers are provided as a pair of left and right sides and the mounting position in the left and right direction is adjustable, so that the processing environment (the running width of the reference plane) can be adjusted. Changes in size, etc.).

The invention according to claim 5 of the present invention is characterized in that the tip of a seal fin in a turbine device is processed using the handy cutter, so that high-precision finishing can be quickly performed on site.

[Brief description of the drawings]

FIG. 1 is a structural explanatory view of a handy cutter showing an embodiment of the present invention, wherein FIG. 1 (a) is a side view, FIG. 1 (b) is a rear view, and FIG. 1 (c) is a plan view.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 shows the same operating condition (when adjusting the height of the seal fin)
FIG.

[Explanation of symbols]

 Reference Signs List 1 seal ring 1a annular groove 2 seal fin 3 rotor 4 handy cutter 10 cutter body 11 turret 12 feed screw mechanism 13 milling cutter 14 handle 15 roller 16 female screw 17 roller shaft 18a, 18b color 19 bolt 20a, 20b storage recess 21 substrate 22 Support plate 22a Through hole 23 With (projection) 24 With groove 25 Jib (wedge) 26 Depression 27 Feed screw 27a Hexagon hole 28 Female screw (nut part) 29 Hex wrench 30 Bolt 31 L-shaped tube 31a Horizontal tube portion 31b Vertical tube Part 32 Shaft end 33 Cover 34 Feed screw 34a Vertical groove 35 Nut 36 Set bolt

Claims (5)

[Claims] 1. A cutter body that can be manually moved in the front-rear direction following a reference plane, and a tool that is rotatably supported on the cutter body via a tool post and that is supported in a height-adjustable manner with respect to the reference plane. , A handy cutter characterized by comprising: 2. The tool post is supported by a cutter body so as to be movable in the left-right direction.
The handy cutter described. 3. The handy cutter according to claim 1, wherein the cutter main body is movable by a plurality of rollers arranged in the front-rear direction. 4. The handy cutter according to claim 3, wherein said rollers are provided in a pair of right and left sides, and their mounting positions in the left and right directions are adjustable. 5. A method for adjusting the height of a seal fin, wherein a tip of a seal fin in a turbine device is processed by using the handy cutter according to any one of claims 1 to 4.