JPH0857654A - Plasma cutting device - Google Patents

Abstract

PURPOSE: To automate cutting work and save manpower thereof by traveling a moving board, moving block, moving arm respectively forward/backward, left/right, up/down slidable and operating position of plasma torch. CONSTITUTION: By rotating a pinion 9 meshed with a rack 6, while a servo motor M1 is driven, a moving board 7 to support whole device is traveled in the longitudinal direction along a linear guide G1, the whole device is travelled up to piercing start position. At about the same time, the servo motor M3 is driven, a traverse feed screw shaft 28 is rotated a moving block 22 of torch holder T is traveled forward/backward in the left/right width directions along a linear guide G3, the plasma torch T is traveled up to piercing start position. Successively, a servo motor M2 is driven, a vertical feed screw shaft 17 is rotated to descend a moving arm 13, the tip part of plasma torch T and a work W is adjusted to the prescribed cutting gap and then the plasma torch T starts plasma cutting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma cutting apparatus, and perforates a circular hole, a rectangular hole or the like at a predetermined position of various steel materials such as a beam material, a girder material and a column material, and various cut grooves and It is used for cutting punched patterns, etc., and contributes to automation and labor saving of this kind of punching and cutting work.

[0002]

2. Description of the Related Art Conventionally, when a circular hole, a rectangular hole or the like is drilled at a predetermined position of various steel materials such as a beam material, a girder material or a column material, or various cutting grooves or punched patterns are cut, A scribe is manually inserted along the cutting line, and an operator having a cutting torch manually perforates the gas by performing a gas cutting along the scribe.

[0003]

Therefore, in the conventional gas cutting, the scribing work by hand is indispensable, and since the gas cutting is done by hand, the cut surface is relatively rough and the appearance is not good. When chipping, especially when a large number of holes are formed in various steel materials, the holes are considerably uneven.

[0004]

Therefore, in the present invention, the above-described punching work and cutting work are invented in order to cope with automation, labor saving, etc. with a relatively small and compact cutting device. The rack 6 and the linear guide G1 are installed and fixed in parallel on the rail base 5, and the slidable movable plate 7 is mounted on and supported by the linear guide G1, and the pinion 9 that meshes with the rack 6 is mounted on the movable plate 7. Servo motor M to operate
1 and a vertically supported support mast 10, a linear guide G2 is vertically fixed to the support mast 10, and a slidable movable arm 1 is attached to the linear guide G2.
3, the movable arm 13 is supported by the servo motor M2 and the vertical feed screw shaft 17 so as to be vertically reciprocally movable up and down, and the linear guide G3 is fixed to the movable arm 13 in the left-right width direction, The linear guide G3 supports a movable block 22 of a slidable plasma torch T, and the movable block 22 is connected to the servo motor M3 and the lateral feed screw shaft 2.
8 provides a plasma cutting device configured to be movable back and forth in the left-right width direction.

[0005]

First, the servo motor M1 is driven to move the rack 6
By rotating the pinion 9 that meshes with the movable platen 7, the movable platen 7, which supports the entire device, is moved along the linear guide G1 in the longitudinal direction by a predetermined distance, and the device is moved to the hole drilling start position. Move the whole. Around this time, the servo motor M3 is driven to rotate the lateral feed screw shaft 28 to move the movable block 22 of the torch holder T supported by the lateral feed screw shaft 28 along the linear guide G3 in the left-right width direction. The plasma torch T is moved to the start position of hole processing. Then, the servomotor M2 is driven to rotate the vertical feed screw shaft 17 to move the movable plate 13 supported by the vertical feed screw shaft 17 downward, and thereby the tip of the plasma torch T and the workpiece. The object W is adjusted to have a predetermined cutting gap. Then, the plasma jetting from the plasma torch T starts the plasma cutting of the workpiece W, and thereafter, the servomotors M1 to M3 rotate in the normal and reverse directions according to the initially input data such as the hole diameter and the cutting line shape. Is controlled automatically, so that the cutting process is performed while the plasma torch T is appropriately moved in the front-rear, left-right direction, or the front-rear, left-right, up-down direction.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the accompanying drawings. In FIGS. 1 and 2, reference numeral 1 is a mounting table for a work W on which various steel materials such as beam materials, girder materials, and pillar materials are mounted. That is, the upper table surface 2 is partitioned and formed in a grid pattern. Reference numeral 3 is a mounting bracket which is formed so as to overhang the table leg 4 at one side of the mounting table 1. Reference numeral 5 denotes a long rail mount installed and fixed to the mounting bracket 3, and a long rack 6 having meshing teeth formed on the front surface on the front side of the upper surface thereof.
And a long linear guide G1 on the rear side of the upper surface of the rack 6 with respect to the rail mount 5.
And the linear guide G1 are arranged in parallel. Reference numeral 7 denotes a rectangular movable plate mounted on and supported by the linear guide G1, and a gear box 8 having a built-in reduction mechanism at the other side of the upper surface thereof.
Is installed and fixed, and a servo motor M1 for moving the movable plate 7 back and forth in the longitudinal direction is installed above the gear box 8. Reference numeral 9 is a pinion fixed to the output shaft of the gear box 8, and as shown in FIGS.
After being exposed from the bottom surface of the rack, the rack 6 is engaged with and engaged with the rack 6. Reference numeral 10 denotes a support mast, which is vertically erected and installed and fixed at a position on one side of the rear portion of the upper surface of the movable platen 7. 4 and 5, reference numeral 11 denotes a guide piece fixed to the bottom surface of the movable plate 7, which is slidably fitted into the linear guide G1. Reference numeral 12 denotes a stopper guide fixed to the rear bottom surface of the movable platen 8, which comes into contact with the limit switches L1 and L2 attached to the forward and backward ends of the rail mount 5 to stop the drive of the servo motor M1 and move the movable plate 8. The range of movement of the board 7 in the longitudinal direction is regulated and controlled.

G2 is a linear guide fixed vertically to the side surface of the support mast 10, and 13 is a movable arm slidably inserted in the linear guide G2. It extends in an extended state. 1
Reference numeral 4 denotes a U-shaped bearing bracket fixed to the lower portion of the front surface of the support mast 10, and the movable arm 1 is attached to the lower end portion thereof.
A servo motor M2 for vertically reciprocating 3 is fixed. Reference numeral 15 is a bearing plate fixed to the upper end portion of the support mast 10, 16 is a nut plate protrudingly fixed to the base end portion of the movable arm 13, 17 is a vertical feed screw shaft, and the lower end portion thereof is a bearing bracket. Supported by 14
The other end is screwed into the nut plate 16, and the upper end portion thereof is rotatably supported by the bearing plate 15, and the servomotor M2 and the vertical feed screw shaft 17 are connected by the shaft joint 18. In FIGS. 3, 6 and 7, 19 is a guide piece fixed to the back surface of the base end of the movable arm 13 and slidably fitted in the linear guide G2. 20
Is a stopper guide fixed to the rear surface of the movable arm 13 near the base end, and drives the servomotor M2 by contacting the upper end of the rear surface of the support mast 10 and the limit switches L3 and L4 attached to the lower part. Is stopped, and the vertical movement range of the movable arm 13 is regulated and controlled.

G3 is a linear guide fixed to the front surface of the movable arm 13 in the left-right width direction, reference numerals 21 and 22 are torch holders having a plasma torch T inserted therethrough, and movable blocks thereof. As shown in FIG. 3, the guide piece 23 fixed to the back surface is slidably fitted into the linear guide G3. 24 is a movable arm 13
The motor holder is fixed to the base end of the plasma torch and has a servo motor M3 for moving the movable block 22 of the plasma torch T back and forth in the left-right width direction. Two
5 is a bearing plate fixed to the tip of the movable arm 13;
Is a bearing fixed to the base end portion of the movable arm 13, 27 is a nut member fitted and fixed to the lower rear position of the movable block 22, 28 is a horizontal feed screw shaft in the left-right width direction, and the base end portion is a bearing. 26, the other end of which is screwed into a nut member 27, and the front end of which is rotatably supported by a bearing plate 25, and the servomotor M3 and the lateral feed screw shaft 28 are connected by a shaft coupling. It is connected at 29. Reference numeral 30 denotes a stopper guide formed on the upper end of the back surface of the movable block 22 so that the stopper guide 30 comes into contact with a limit switch L5 attached to the base end of the movable arm 13. Reference numeral 31 denotes a stopper attached to the side portion of the movable block 22, which can be brought into contact with the limit switch L6 attached to the tip of the movable arm 13. The limit switches L5 and L6 regulate and control the moving range of the torch holder 21 in the left-right width direction.
In FIG. 1, reference numeral 32 denotes a cover plate having a U-shaped cross section, which covers the limit switches L3 and L4 attached to the back surface of the support mast 10. Reference numeral 33 denotes a cover hose, which accommodates a supply hose for the working gas, a power cord, etc., and is fitted into the head portion of the plasma torch T. Three
Reference numeral 4 is a cover hose containing sensor cords.

Therefore, as shown in FIG. 1 and FIG. 2, after setting a workpiece, which is the workpiece W, at a predetermined position on the table surface 2 of the mounting table 1, the workpiece W is separated by a space. ,
When drilling a circular hole, information such as the size of the mounted workpiece W, the distance between the drilling positions, and the hole diameter is input to the interactive control device (not shown) in advance, Operate a predetermined start button. First, when the servomotor M1 is driven to rotate the pinion 9 that meshes with the rack 6, the movable platen 7 that supports the entire device is moved along the linear guide G1 in the longitudinal direction by a predetermined distance. Then, the whole apparatus is moved to the start position of hole processing. Around this, when the servo motor M3 is driven to rotate the lateral feed screw shaft 28, the movable block 22 of the torch holder T is moved to the linear guide G3 via the nut member 27 screwed onto the lateral feed screw shaft 28. The plasma torch T is moved forward and backward in the left-right width direction along this, and the plasma torch T is moved to the start position of hole processing. Next, when the vertical feed screw shaft 17 is rotated by driving the servo motor M2, the movable plate 13 is moved downward via the nut plate 16 screwed onto the vertical feed screw shaft 17, and thereby the plasma torch T After adjusting the tip end of the and the workpiece W to a predetermined cutting gap,
The plasma ejected from the plasma torch T in a jet shape starts plasma cutting of the workpiece W. After that, the plasma torch T is moved in the front-rear, left-right direction by automatically controlling the forward and reverse rotations of the servomotors M1 to M3 according to the data such as the hole diameter and the cutting linearity that are initially input.
Alternatively, the cutting process is performed while appropriately moving in the front-back, left-right, and up-down directions.

[0010]

According to the present invention, as described above, the rail mount 5 is used.
A rack 6 and a linear guide G1 are installed side by side and fixed to the linear guide G1, and a slidable movable plate 7 is mounted on and supported by the linear guide G1. M1 and a vertically supported support mast 10 are provided, a linear guide G2 is vertically fixed to the support mast 10, and a slidable movable arm 13 is supported by the linear guide G2. Thirteen
Is supported by a servo motor M2 and a vertical feed screw shaft 17 so as to be able to reciprocate up and down in the vertical direction, and a linear guide G3 is fixed to the movable arm 13 in the lateral width direction, and is slidable on the linear guide G3. A plasma cutting device is provided which supports the movable block 22 of the plasma torch T and is configured to be movable back and forth in the left-right width direction by the servo motor M3 and the lateral feed screw shaft 28.
It can contribute to automation and labor saving of drilling and cutting work such as accurately drilling circular holes, rectangular holes, etc. at predetermined positions of various steel materials, cutting various grooving grooves, punching patterns, etc. However, it brings various effects such as dramatically improving the cutting work for this type of shaped steel.

[Brief description of drawings]

FIG. 1 is a perspective view of an attached state of a plasma cutting device as seen obliquely from the front.

FIG. 2 is a perspective view of the same seen from the rear.

FIG. 3 is a perspective view showing a disassembled state of a movable plate, a support mast, and a movable arm.

FIG. 4 is a rear view showing a movable plate which travels and moves in a longitudinal direction by a servo motor, and limit switches attached to front and rear ends of a rail mount.

FIG. 5 is a plan view of the same.

FIG. 6 is a side view showing an upper structure mounted on a rail mount, in which one of the servomotors rotates a pinion that meshes with a rack to move the movable plate forward and backward in the longitudinal direction and also to support the mast. The movable arm supported by
The other servo motor moves up and down in the vertical direction.

FIG. 7 is a front view showing a limit switch attached to the back surface of a support mast and a movable arm.

FIG. 8 shows a movable arm supported by a support mast and a movable block of a plasma torch attached to the movable arm.
It is a side view which shows the drive structure which moves back and forth with a servomotor.

FIG. 9 is a plan view of the same.

[Explanation of symbols]

 W Workpiece G1 to G3 Linear guide L1 to L6 Limit switch M1 to M3 Servo motor T Plasma torch 1 Mounting table 2 Table surface 3 Mounting bracket 4 Table leg 5 Rail mount 6 Rack 7 Movable plate 8 Gear box 9 Pinion 10 Support mast 11, 19, 23 Guide piece 12, 20, 30 Stopper guide 13 Movable arm 14 Bearing bracket 15, 25 Bearing plate 16 Nut plate 17 Vertical feed screw shaft 18, 29 Shaft joint 21 Torch holder 22 Movable block 24 Motor holder 26 Bearing 27 Nut Member 28 Side feed screw shaft 30 Stopper guide 31 Stopper 32 Cover plate 33, 34 Cover hose

Claims (2)

[Claims] 1. A rack 6 and a linear guide G1 are installed and fixed in parallel on a rail mount 5, and a slidable movable plate 7 is mounted on and supported by the linear guide G1. Servomotor M1 for operating the meshing pinion 9
And a supporting mast 10 that is vertically raised, and the linear guide G2 is fixed to the supporting mast 10 in the vertical direction.
A slidable movable arm 13 is supported by the linear guide G2, and the movable arm 13 is supported by a servomotor M2 and a vertical feed screw shaft 17 so as to be vertically reciprocally movable up and down. Fixes the linear guide G3 in the left-right width direction, supports the movable block 22 of the slidable plasma torch T on the linear guide G3, and attaches the movable block 22 to the servo motor M3 and the lateral feed screw shaft 28.
A plasma cutting device characterized in that it can be moved back and forth in the left-right width direction by and. 2. A movable plate 7 is provided with a stopper guide 12,
The stopper guide 12 comes into contact with the limit switches L1 and L2 provided at the forward and backward ends of the rail pedestal 5 to restrict the movable range of the movable plate 7 in the longitudinal direction, and the movable arm 13 is provided with a stopper. The guide 20 is provided, and the stopper guide 20 makes contact with the limit switches L3 and L4 provided at the rising end and the falling end of the support mast 10, thereby restricting the vertical movement range of the movable arm 13, and The movable block 22 is provided with a stopper guide 30, and the stopper guide 30 and the movable block 22 come into contact with the limit switches L5 and L6 provided at the forward end and the backward end of the movable arm 13 to move the movable block 22 in the left-right width direction. The plasma cutting device according to claim 1, wherein the moving range is restricted.