JP2002154043A - Grinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable type grinder capable of automatically grinding a fillet welding portion, thus honogenizing a finish surface, resolving a health problem of workers by labor saving, and being compacted and fabricated at low costs. SOLUTION: This portable type grinder comprises a self-travelling carriage 2 running on a work 1; a carriage fixing mechanism for fixing or making movable the carriage 2 to the work 1; a first frame 26 attached to the carriage 2 through a horizontal position regulating mechanism 10 forming an approximate right angle with the work and a vertical position regulating mechanism 15 and the work; a second frame 27 approaching/separating from the fillet welding portion 1c by a cutting mechanism having a driving device; a grinder body 9 attached to the second frame 27; and a control board 8 for controlling operations of a running motor 6 for the carriage 2, the driving device of the cutting mechanism and the driving device of the grinder body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinder for grinding a fillet weld, and more particularly to a grinder suitable for grinding a ring-shaped fillet weld such as a turning wheel of a construction machine.

[0002]

2. Description of the Related Art Conventionally, when grinding a fillet weld of a turning wheel of a construction machine, work is generally performed by a hand-held grinder. In the case of grinding a fillet weld of a turning wheel, a rail is provided along the turning ring, and a fillet weld is ground by a grinder robot traveling on the rail.

[0003]

Conventionally, the fillet welds are ground by a hand-held grinder, so that the quality of the finished surface is uneven due to the skill of the worker and requires skill. In addition, dust is generated by the grinding, the working environment is deteriorated, and vibration at the time of grinding acts on the hands of the worker, which may adversely affect the health of the worker. Further, in the case of grinding a fillet weld by a grinder robot traveling along the rail, it is necessary to install the rail, and there is a problem that the apparatus is large and expensive.

SUMMARY OF THE INVENTION In view of the above problems, the present invention can automate the grinding of a fillet welded portion, thereby making it possible to homogenize the finished surface and to eliminate the problem of worker health due to labor saving, and to be compact and more compact. It is an object of the present invention to provide a portable grinder that can be manufactured at low cost.

Another object of the present invention is to provide a grinder in which a belt grindstone device can be formed with a simple structure, which can perform arc-shaped grinding.

[0006]

A grinder for grinding a fillet weld is a self-propelled bogie that runs on a work and the grinder is fixed to the work. A movable frame fixing mechanism, a first frame mounted on the vehicle via a vertical position adjusting mechanism and a left / right position adjusting mechanism for adjusting a position in a direction approaching and separating from the work, and a first frame mounted on the first frame. A second frame which is attached and is moved toward and away from the fillet weld by a cutting mechanism having a driving device, a grinder body attached to the second frame, a traveling motor of the bogie, the notch A drive unit for the mechanism and a control panel for controlling the operation of the drive unit for the grinder body.

In this grinder, the bogie is fixed on the work by the bogie's vertical bogie fixing mechanism, and the position is adjusted by the position adjusting mechanism in the vertical direction of the first frame and in a direction substantially perpendicular to the work by the position adjusting mechanism. I do. Then, the first frame, that is, the belt grindstone is brought close to the fillet welded portion by the cutting mechanism while driving the belt grindstone, and the fillet welded portion is ground. After grinding the portion, the cutting mechanism retracts the belt grindstone from the fillet weld, and moves the bogie to the next adjacent portion to grind the fillet weld in the same manner as described above.

Such a movement can be carried out by automatic control by mounting a control panel supplied with power from an external power supply on the bogie, thereby saving labor and unmanning, and eliminating the health problem of workers. You. In addition, by adopting a configuration in which a bogie is set on the work to change the grinding location, a large-scale device for providing a rail along the work is not required, and can be provided at a low cost. In addition, since the trolley is mounted on the work, the work can be portable and can be applied to various work places.

According to a second aspect of the present invention, in the first aspect, the grinder main body wraps the belt grindstone between the tail end side driving roller and the front end side driven roller, and rotates the driving roller by a motor to form the belt grindstone. The driven roller is mounted on a pivot shaft that is rotatably mounted on a base shaft mounted on the second frame, and the driven roller is mounted on the driven roller, and the driven motor and the driven roller are mounted. The frame of the grinder body is rotatably supported by a pivot shaft of the tip roller and a support arm swingably attached to the second frame.

With such a configuration, even if the driven roller revolves around the base shaft and rotates about the pivot shaft, the distance between the driven roller and the driving roller becomes constant, and arc-shaped grinding is performed. In addition, it is possible to perform the operation with a simple configuration without loosening the belt grinding wheel due to the revolution of the driven roller.

[0011]

FIG. 1 is a side view of a grinder according to the present invention, and FIG. 2 is a plan view thereof. 1 is a work,
Fillet weld 1c is formed between horizontal portion 1a and vertical portion 1b. The work 1 in this example is a case where the work 1 is a turning wheel of a construction machine. The grinder of the present invention includes a carriage 2 that is mounted so as to be able to travel along a work 1. The carriage 2 includes an upper roller 3 that rolls on the upper surface of the vertical portion 1b, and side rollers 4 and 5 as guide rollers that roll on one side (inner surface) and the other side (outer surface). A traveling motor 6 is mounted on the carriage 2, and the upper roller 3 is driven to rotate by the driving of the motor 6 to travel along the work 1.

One of the side rollers 4, 5 is a work fixing mechanism for fixing the carriage 2 to the work by pressing the roller 4 against the side of the work 1 by the air cylinder 7. Reference numeral 8 denotes a control panel mounted on the carriage 2 and supplied with power from the outside. The control panel 8 includes switches and a computer for controlling the operation of the motor 6, the air cylinder 7, or an actuator described later. The control is performed.

Reference numeral 9 denotes a grinder body. Reference numeral 10 denotes a left / right position adjustment mechanism for horizontally moving the grinder body 9 to adjust the position of the grinder body 9 toward and away from the work 1. The right and left position adjusting mechanism includes a horizontal guide frame 11 installed on the carriage 2.
A laterally movable frame 12 movably mounted along the lateral guide frame 11, and a female screw member 13 fixed to the laterally movable frame 12
And an adjusting screw rod 14 with a knob 14a, which is rotatably inserted into the horizontally movable frame 12 so as to be relatively unmovable and screwed to the female screw member 3, and by turning the knob 14a, 12 moves left and right in FIG.

Reference numeral 15 denotes a vertical position adjusting mechanism for the grinder body 9. The vertical position adjusting mechanism 15 is provided with the horizontal movable frame 1.
2, a vertical movable frame 17 movably mounted along the vertical guide portion 16, a female screw member 19 fixed to the horizontal movable frame 12, and a relative vertical movement to the vertical movable frame 17. An adjusting screw rod 20 with a knob 20a which is impossiblely and rotatably inserted therethrough and screwed into the female screw member 19;
By turning the knob 20a, the vertically movable frame 17 moves up and down in FIG.

Reference numeral 21 denotes a first frame fixed to the lower end of the vertical movable frame 17 for supporting the grinder body 9. 22
Denotes a cutting mechanism of the grinder body 9, wherein the cutting mechanism 22 is provided on the movable member 23, the movable member 23 being attached to the first frame 22 so as to be close to and releasable from the fillet weld 1 c. And a rod rotation motor 25 attached to the first frame 21. By rotating the rod 24 by the motor 25, the movable member 23 is attached to the fillet weld 1c. Approach and depart from. Reference numeral 26 denotes a second frame fixed to the movable member 23.

The grinder body 9 is mounted on the second frame 26. 27 is a frame of the grinder body 9. The frame 27
Is rotatably connected at one end to a pivot shaft 30 of a driven roller 29 attached to the second frame 26 with a structure described later, and as shown in FIG. The lower end of a support arm 32 rotatably connected to a shaft 31
3, and are rotatably connected and supported.

FIG. 4 is a cross-sectional view showing the structure of the grinder body 9. A cylindrical shaft 35 is fixed to one end of the frame 27, and a driving roller 39 is rotatably mounted on the outside of the cylindrical shaft 35 via a bearing 36 concentrically. The motor 40 for rotating the drive roller 39 (see FIG. 1)
7 is fixedly attached to one end. An output shaft 40 a of the motor 40 is coupled to a rotation shaft 42 via a coupling 41. The rotating shaft 42 is rotatably fitted in the cylindrical shaft 35 via a bearing 43. The rotating shaft 42 and the driving roller 39 are integrally connected by a connecting plate 44 and a bolt 45. Therefore, the output shaft 40 of the motor 40
The drive roller 39 also rotates by the rotation of a.

A connecting member 47 is rotatably mounted on a base shaft 46 mounted on the work-side end of the second frame 26 via a bearing 48 (see FIG. 5). The connecting member 47
The pivot shaft 30 of the driven roller 29 is eccentrically attached to the base shaft 46. As described above, one end of the frame 27 of the grinder body 9 is rotatably connected to the pivot shaft 30. The driven roller 29 is rotatably fitted to the pivot shaft 30 via a bearing 49. A belt grindstone 50 is wound around the driven roller 29 and the driving roller 39. Therefore, when the drive roller 39 rotates by the drive of the motor 40, the power is also transmitted to the driven roller 29 via the belt grindstone 50, and the driven roller 29 also rotates. The frame 27 is configured so that the length of the belt grindstone 50 can be adjusted by combining the two members 27a and 27b so that the length can be adjusted, but the details are omitted.

The driven roller 29 is swung about the base shaft 46. The swing mechanism will be described with reference to the cross-sectional view of FIG. 5 and the side view of FIG. 53 is the second frame 2
6 is a gear that is rotatably attached to the gear 6 via a bearing 54. The gear 53 is a gear 5 rotated by a motor 55.
6, and the gears 53 and 56 are rotated by the rotation of the motor 55.

A shaft 57 is fixed to the gear 53 at an eccentric position, and the shaft 57 is rotatably connected to the shaft 57 via a bearing 59.
0 is attached. One end of a link 61 is connected to the plate 60, and the other end of the link 61 is connected via a bearing 63 to a shaft 62 fixed to a connecting member 47 rotatably attached to the base shaft 46. Therefore, the driven roller 29 swings about the base shaft 46 by the rotation of the motor 55.

The link 61 of this embodiment has two members 61a,
The structure in which the bolts 61b are connected by bolts 64 passing through the elongated holes 61c allows the length to be adjusted, thereby enabling the swing position to be changed.

The grinding of the fillet welded portion 1c using this grinder is performed, for example, as follows. First, the carriage 2 is positioned at a predetermined position on the work 1 by driving the traveling motor 6, and the side cylinder 4 is pressed against the inner surface of the work 1 and fixed by extension of the air cylinder 7. The motor 25 of the cutting mechanism 22 is actuated from the state where the second frame 26 is separated from the workpiece 1 to bring the second frame 26 close to a predetermined distance. At the same time, the motor 40 of the grinder main body 9 is operated to rotate the belt grindstone 50, and the motor 55 is operated to swing the driven roller 29 about the base shaft 46, so that the fillet weld 1
Grind c. In this case, as the driven roller 29 swings, the frame 27 of the grinder body 9 is also supported by the pivot shaft 30 and the swingable support arm 32.
The frame 27 also oscillates following the swaying of the frame 9.

By the swing of the driven roller 29, the fillet weld 1c is ground in an arc shape. As a mechanism for swinging the driven roller 29, it is conceivable to attach the driven roller so as to be able to swing about an axis attached to the frame 27, but in this configuration, the interval between the driven roller and the driven roller changes with the swing. Therefore, a roller or the like for preventing loosening of the belt grindstone is required, and the structure is complicated, but the structure shown in the present embodiment has a simple configuration without loosening the belt grindstone,
Arc-shaped grinding can be performed.

As described above, after the grinding by the belt grindstone 50 is performed a plurality of times while the driven roller 29 is rocked, the motor 25 of the cutting mechanism 22 is operated to move the frame 26,
27 is evacuated. Next, the air cylinder 7 is contracted to stop the pressing of the side roller 4 against the work 1 so that the side roller 4 can run.
Next, the carriage 2 is run for a distance slightly shorter than the width of the belt grindstone 50, and the carriage 2 is again moved to the work 1 by the air cylinder 7.
And the same grinding operation as described above is performed.

After repeating the running and stopping of the bogie 2 a plurality of times in the forward direction, the running is stopped in the opposite direction, that is, in the reverse direction, at the same pitch as described above, and the grinding is performed. Is repeated. In this case, the cutting depth of the second frame 26 is set to be deeper than that in the grinding in the forward direction, that is, the grinding is performed closer to the work 1 side.

As described above, after the forward movement is repeated a plurality of times and the backward movement is repeated the same number of times, the carriage 2 is then advanced by a distance that jumps over the area ground as described above, and a plurality of forward, stop, Repeat the same number of reverse, stop, and deeper grinding.

Such a grinding operation is performed for the entire area of the work. Such a grinding operation can be automatically performed by program control by a computer mounted on the control panel 8. For this reason, labor saving and unmanned operation can be achieved, and the health problem of the worker is solved. In addition, by adopting a configuration in which the carriage 2 is installed on the work 1 to change a grinding position, a large-scale device for providing a rail along the work 1 is not required, and can be provided at a low cost. In addition, since the trolley 2 is installed on the work 1, it can be portable and can be applied to various work places.

The present invention can be applied not only to the case where the work 1 has a ring shape but also to a straight or curved work.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a grinder according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a side view showing a part of a support structure of the frame of the grinder body of the present embodiment for a second frame.

FIG. 4 is a cross-sectional view showing the grinder body of the present embodiment.

FIG. 5 is a cross-sectional view illustrating a swing mechanism of a driven roller according to the present embodiment.

FIG. 6 is a side view showing a swing mechanism of a driven roller according to the embodiment.

[Explanation of symbols]

1: Work, 1c: Fillet weld, 2: Bogie, 3: Top roller, 5, Roller, 6: Motor for running, 7: Air cylinder for fixing bogie, 8: Control panel, 9: Grinder body , 10: left and right position adjustment mechanism, 11: horizontal guide frame, 1
2: horizontal movable frame, 13, 19: female screw member, 14, 20:
Adjustment screw rod, 14a, 20a: knob, 15: vertical position adjustment mechanism, 16: vertical guide section, 17: vertical movable frame, 2
1: first frame, 22: cutting mechanism, 23: movable member, 2
4: screw lot, 25: motor, 26: second frame, 2
7: Frame of grinder body, 29: driven roller, 30: pivot shaft, 31: shaft, 32: support arm, 33: shaft, 35:
Cylindrical shaft, 39: drive roller, 40: motor, 40a: output shaft, 41: coupling, 42: rotating shaft, 44: coupling plate, 45: bolt, 46: base shaft, 47: connecting member, 5
0: belt whetstone, 53, 56: gear, 55: motor, 5
7: eccentric shaft, 60: plate, 61: link

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Tsugio Udagawa 650, Kandate-cho, Tsuchiura-shi, Ibaraki Hitachi Construction Machinery Co., Ltd. (72) Inventor Kazutoshi Furukawa 5-5-1 Kita Shinagawa, Shinagawa-ku, Tokyo Inside Aichi Sangyo Co., Ltd. (72) Shinya Furuta 5-5-Kita Shinagawa, Shinagawa-ku, Tokyo No. 12 Aichi Sangyo Co., Ltd. F-term (reference) 3C058 AA05 AA09 AA11 AA14 AA16 BA07

Claims (2)

[Claims] 1. A grinder for grinding a fillet weld, comprising: a self-propelled trolley running on a work; a trolley fixing mechanism for fixing and moving the trolley relative to the work; A first frame attached via a left / right position adjustment mechanism for adjusting the position in a direction approaching and separating from the mechanism and the workpiece; and a notch attached to the first frame and having a driving device for the fillet weld. A second frame approached and separated by a mechanism, a grinder main body attached to the second frame, a driving motor of the carriage, a driving device of the cutting mechanism, and an operation control of a driving device of the grinder main body. And a control panel for performing the grinding. 2. The grinder according to claim 1, wherein the grinder body wraps a belt grindstone between a tail end side driving roller and a front end side driven roller, and drives the belt grindstone by rotating the driving roller by a motor. Wherein the tip roller has a shaft attached to a pivot shaft which is rotatable about a shaft attached to the second frame, and the drive roller, its drive motor and a driven roller are attached. The grinder is characterized in that a frame of the grinder body is rotatably supported by a pivot shaft of the tip roller and a support arm swingably attached to the second frame.