JPS59107817A - Edge preparing device of square steel pipe - Google Patents

Abstract

PURPOSE:To enable edge preparation of the whole circumference continuously and automatically, by a method wherein the titled device is so constituted that profile machining can be done under a pinching, pressing and holding state of a circumferential face (stock) of a material to be machined. CONSTITUTION:In case of edge preparation in relation to a square steel pipe, the square steel pipe on a conveyor C is fed up to the upper part of a receiving face 3a of a guide rail 3, to begin with, and positioning is done by hitting the tip part against a hitting piece 16. Then the hitting piece 16 is retired, and the square steel pipe is clamped by a pair of both side vice pieces 4b and an upper pressure plate 11. Then the center of the square steel pipe in the vertical direction is made to coincide with a center position of a revolving board 29 through an up-and-down operation of a supporting board 23. The revolving board 29 is revolved, and the edge preparation to a fringe part of the edge of the external circumference of the square steel pipe is made to perform through a cutter 40 under action of a profiling roller 43 and a pressing roller 50 after the cutter 40 is revolved after that and after depth setting motion has been made to perform by moving a machining mechanism in the central direction of the revolving board 29 through a moving unit 36.

Description

[Detailed description of the invention] This invention can be applied to various steel pipes such as square steel pipes and round steel pipes.

Conventionally, beveling of various types of pipe materials has often been done by gas cutting, but when this method is used, the shape of the cut periphery may not be consistent or the quality may change.
It is not suitable for welding as is. Therefore, the defective cutting was corrected manually using a grinder or an electric planer, and the deteriorated layer was removed, but this method was inefficient and required a significant amount of labor.

In recent years, a type of cutter head has been developed that moves the cutter head in the X-axis and Y-axis directions to perform beveling on the peripheral edge.This type of cutter can process edges, or flat surfaces, without any problem, but it is difficult to cut corners. I was unable to process a certain small radius part. Therefore, this part still has no choice but to rely on manual processing such as grinding, and from the viewpoint of improving productivity and processing accuracy, it is desired to develop a beveling machine that can automatically process up to this rounded part. It had been. Further, this method also has the problem that when the workpiece material is distorted, it is not possible to precisely perform beveling according to the shape of the outer peripheral edge of the material.

The present invention has been made in view of the above-mentioned circumstances, and the first object of the present invention is to carry out profile cutting while holding the peripheral surface (inside) of the workpiece material under pressure from both the front and back sides. The peripheral bevel processing is performed continuously and automatically to make it smooth, and at the same time, it eliminates the occurrence of chatter especially in the case of thin-walled materials, allowing high-precision and highly efficient processing. The purpose is to be able to perform smooth beveling to accommodate any size of workpiece material, and the third purpose is to stabilize υ machinability by using a balanne weight that balances the load applied to the cutting mechanism. The object of the present invention is to provide a beveling machine for square steel pipes, etc. whose cutting mechanism can be easily operated.

An embodiment embodying the present invention will be described in detail below with reference to the drawings.

The basic structure of the beveling machine according to the present invention is a clamping device that clamps and fixes a workpiece material such as a corner cutter (hereinafter simply referred to as a cutter) in a predetermined position, and a clamp device that clamps and fixes a workpiece material such as a corner cutter (hereinafter simply referred to as a cutter) in a predetermined position, and a The clamping device is equipped with a cutting device for cutting, and the configuration of the former clamping device will be described first.

In Figures 1 to 3 of the drawings, the code 1 is 1.
A horizontal bed is disposed on the front side (right position in FIG. 1) of the horizontal bed 2, and a horizontal guide tray /L/ 3 as shown in the left-right direction in FIG. A pair of vice pieces 4a and 4b on both sides are held on this guide rail 3, and these vice pieces 4a,
4b is opened and closed in a centripetal manner by nut cylinders 5a and 51] fixed to the lower part of the nut cylinders 5a and 51, respectively, and a feed screw shaft 6 having reverse threaded portions screwed into these nut cylinders 5a and 5b.

The feed screw shaft 6 is rotatably supported at both ends of the guide rail 30, and the opening/closing operation 4/handle 7 is fixed to one end thereof. It should be noted that other means for opening and closing the vice pieces 4a, 4b include a hydraulic cylinder, an electric motor, etc., and it goes without saying that these can be used as appropriate.

Next, reference numerals 8a and 8b denote a pair of left and right columns erected on both sides of the horizontal bed 2 on which the vice device is disposed, and a cross beam 9 is installed on these columns 8a and 8b so as to be vertically adjustable. A hydraulic cylinder 10 is fixed to the center of the cross beam 9 with the piston rod 10a facing downward, and a press plate 11 is attached to the lower end of the piston rod 10a. In addition, in ``2'', the horizontal beam 9 is a screw type lifting adjustment means 1.
After the height is set by 2, it is connected to the columns 8a, 8b by fixing pins 13.13, so that the suppression plate 11 can be adapted to workpieces having various dimensions.

What is indicated by the trench symbol 14 is a roller for receiving processed materials placed on the front side of the horizontal bed 2, and this receiving roller 14 is arranged in alignment with the receiving surface 3a formed on the upper surface of the guide rail 3 described above. be done. In this example, the above-mentioned receiving roller 1
A conveyor device C consisting of free rotating rollers is connected to the front side of 4.

The workpiece is clamped from both sides by the above-mentioned double-sided pieces 4a, 41, and is pressed from above by the pressing plate 11 to clamp and fix the workpiece in a fixed position. Note that the clamping device may be configured to be installed twice in the front-rear direction (left-right direction in FIG. 1).

This section describes a ruler device that positions the machined part when cutting the workpiece.8 This ruler device is used for machining when feeding the workpiece, in order to bring the tip of the workpiece into contact and determine its position. It is configured to protrude to a position in front of the material and to retract therefrom when clamping is completed and cutting is started. That is, reference numeral 15 is a rotating arm having an abutment piece 16 at its tip, and the other end of this arm is pivotally supported by a horizontal bearing mechanism 17 provided on the horizontal bed 2. A hydraulic cylinder 18 is associated with this rotating arm 15, with a piston rod 18a facing upward, and when the piston rod 18a is extended, the abutment piece 16 is projected upward and the lower side of the workpiece is moved. I try to face the front side. Further, when the piston rod 18B is shortened, the contact piece 1
Insert 6 downward from there.

Here, the abutment piece 16 marked 11) is screwed onto the rotating arm 15 and can be adjusted in its position in the front and back direction, so that the attachment position of the workpiece to the cutter, which will be described later, can be finely adjusted. Set the root face of the cutting surface as required during machining.

The above are the details of the clamp device that clamps and fixes the workpiece at a predetermined position.

Next, a description will be given of the cutting device provided in correspondence with the clamping device. Reference numeral 21 is a machine frame disposed on the rear side of the machine base 1 (the left position in FIG. 1), and this machine frame 21 is A pair of vertical frames 21B and 21 on both sides erected on the machine stand 1
b, and a cross beam 21C connecting the upper ends of the vertical frames 21a and 21b, forming a gate shape.

A vertical guide 22° 22 is provided inside each of the vertical frames 21 a and 21 b, and this guide 2
2 and 22 are engaged and held so that the substantially rectangular support plate 23 can be moved up and down.

Further, the horizontal beam 21C is configured to freely support a pair of feed screw shafts 24, 24 facing downward and rotating freely, and the feed screw shafts 24, 24 are supported by a nut cylinder 25.24 fixed to the upper end of the support plate 23. 25, and the vertical position of the support plate 23 is adjusted by rotating the support plate 25.

The feed screw shafts 24.24 are connected to electric motors M via transmission gear means 26.26 and interlocking shafts 27 provided at their respective upper ends.
, are related and are rotationally driven by the forward/reverse rotation control of the electric motor Ml.

Next, in the center of the support plate 23 is a large circular recessed hole 2.
A circular rotary disk 29 is rotatably provided in the recessed hole 2 via a support member and a rotational drive mechanism, which will be described later.

That is, the support member is composed of trochanters 30 arranged at four corners of the support plate 23, and these trochanters 3
0... are in contact with the outer peripheral surface of the rotating disc 29. The rotational drive mechanism still includes a gear 31 carved on the outer peripheral surface of the rotary disk 29.
It is composed of a pinion 33 connected to this gear 31 via an intermediate gear 32, and an electric motor M2 with a reduction gear that has this pinion gear 33 fixed to an output shaft.
By driving this electric motor M2, the rotary disk 29 is rotated at a constant speed in the direction shown by the arrow KQ in FIG. Note that this electric motor M2 is equipped with an electrical rotation speed variable means, so that the rotation speed can be freely set.

Further, a straight and wide recessed hole 34 is bored in the center of the rotary disk 29, and a pair of linear guides 35. 35 are provided. A movable body 36 is engaged with this linear guide 35, 35 so as to be able to freely ride.
is equipped with a cutting mechanism and a moving operation mechanism that presses and moves the cutting mechanism toward the center of the rotary disk 29 via this member.

First, the moving operation mechanism will be explained. This mechanism is composed of a hydraulic cylinder 37 disposed in the recessed hole 34, and its piston rod 37a is connected to the movable body 36 side, and the cylinder tube 37 The b side is connected to the peripheral edge of the rotary disk 29. and the piston rod 37
When B is contracted, the movable body 36 is moved in a direction approaching the center of the rotary disk 29, and the piston rod 37 a
Move in the direction away from the center when expanding.

Further, a restricting means for supplying and discharging oil is connected to the hydraulic cylinder 37, so that the moving speed of the moving body 36 can be adjusted as appropriate.

Next, the cutting mechanism first attaches and fixes the bearing sleeve 38 to the moving body 36, and also attaches and fixes the bearing sleeve 38 to the bearing sleeve 38.
to be rotatably supported. Then, one end of the spindle 39 is made to protrude forward (to the right in FIG. 1), and a cutter 40 is attached to the tip. A gear 41 is fixed to the other end, and an electric motor M3 is associated with this gear 41 via a pinion 42.

Here, the cutter 40 is a milling cutter with an umbrella-shaped cutting edge, and the slope (corner radius) of the cutter determines the angle of the groove that can be cut. Therefore, this milling cutter can be applied to curved bevel machining and
Various types are available depending on the situation, and they are installed in a replaceable manner.

The spindle is placed in front of the cutter 40/''3
A copying roller 43 is rotatably supported at the end of the cutter 40 with a size substantially equal to the minimum diameter of the cutter 40. This imitation trochanter 43
When the cutting device is moved toward the center, the cutter 40 comes into contact with the outer peripheral surface of the workpiece to determine the position of the cutter 40.

Next, a description will be given of the suppressing means that comes into contact with the inner circumferential surface of the workpiece and cooperates with the copying roller 43 to hold the curved surface under pressure.

This pressing means operates prior to the start of the cutting process, causes the pressing trochanter 5o to protrude toward the copying trochanter 43 so as to come into contact with the inner circumferential surface of the workpiece, and when the cutting process is finished, from there. Configured to evacuate. That is, reference numeral 51 denotes a rotating arm having a pressing rotor 5o attached to its free end, and the root of this arm is pivoted inside the upper part of the movable body 36. A hydraulic cylinder 52 is attached to the movable body 36 with a piston rod 52a facing upward, and is associated with this rotating arm 51, and operates the oil pressing rotor 50 when the piston rod 52B is extended. state. Furthermore, when the piston rod 5211 is shortened, the pressing rotor 50 is brought into a retracted state.

Next, in FIG. 2, reference numeral L81 is a limit switch associated with the dock 44 installed on the rotary plate 29, and this limit switch LS controls the one-round movement of the rotary plate 29 and its stop position. , to set the cutting position of the cutting mechanism at the start of cutting. Incidentally, in this embodiment, when the cutting mechanism moves toward the center, it is set so that the direction is downward. Reference numeral SW designates a photoelectric switch consisting of a pair of light emitting element and light receiving element attached to nut 53jx3 extended from the movable body 36 on both sides. The material is detected at the position, and the hydraulic cylinder 52 is operated based on the detection signal. As a result, the pressing roller 50 comes into contact with the inner peripheral surface of the workpiece immediately before the cutter 40 cuts into the workpiece. Further, the symbol LS2 is a limit switch that detects that the cutting mechanism is in the retracted position, and this limit switch LS2 is used to confirm the completion of the cutting process and stop the driving of various actuators such as the electric motor and hydraulic cylinder. be.

Reference numeral 45 indicates the load applied to the moving body 36, that is, the moving body 36
This balance weight 45 and the bearing tube 38 of the cutting mechanism are connected by a chain 46, and the chain 46 is hung on a sprocket (47.47). Balance the two.

Now, in order to use the beveling device configured as described above to perform the required beveling on the outer peripheral edge of a square steel pipe, first, the cutter 40 having the required bevel cutting angle is attached to the spindle 39. Then, the trochanter 43 is pivotally supported following the tip. After cutting the cutter 40, the next step is to convey the conveyor device C.
The upper workpiece is fed onto the receiving surface 3a of the guide rail 3 in the clamping device, and its tip is abutted against the protruding contact piece 16 for positioning.

The cutting abutment piece 16 whose tip processing position of the workpiece has been determined in the above manner is retracted downward, and the material is moved from the left and right sides by the pair of vise pieces 4a and 4b on both sides, and then the suppressing plate 11 to press the material from above and firmly clamp it. In this case, the center of the workpiece in the left-right direction is exactly aligned with the center of the rotary disk 29 by the centripetal vice piece 4a14b.

When the workpiece is set as described above and the cutter 40 is cut from above, the outer peripheral edge of the material has the required root face and bevel angle θ as shown in Fig. 4. The positions of each part and the contact piece 16 are set in advance so that the abutting pieces 16 are cut. Note that the adjustment of the root face 1t in the above is performed by adjusting the abutment piece 16 back and forth, but the amount of adjustment at that time is based on a conversion table with the specifications of the material thickness, bevel angle, and root face. Determined by

Further, this conversion table may be associated with the contact piece 16 as a dimension display scale.

After the above operations are completed, the vertical center of the workpiece is aligned with the center position of the rotating disc 29.

This operation is performed by moving the support plate 23 upward or downward under the control of the electric motor Ml, and when this is done, the cutting mechanism that is pressed toward the center of the rotation plate 23 is When the rotary disk 23 is rotated and displaced, the pressing force can be applied to any of the peripheral edges of the workpiece, that is, the top and bottom, left and right sides, and four corners, in substantially the same manner.

Once the various parts have been set, the moving operation mechanism is operated while the cutter 40 is being rotated, and the cutting mechanism is moved toward the center of the rotary disk 29 via the moving body 36. In this way, during the movement, the photoelectric switch SW detects the upper side of the workpiece, and the hydraulic cylinder 52 is activated, and the pressing roller 50 is applied to the inner circumferential surface side immediately before the cutter 40 cuts. The cutter 40 cuts along the outer periphery of the center part of the upper side of the workpiece until the roller 43 comes into contact with it and then stops. In this case, even if the workpiece is thin, there is no chatter and the cutting can be done easily and well.

When the cutting operation of the cutter 40 is completed, the moving operation mechanism and the suppressing means are activated, and the rotary drive mechanism is activated to rotate the rotary disk 29 in the direction of the arrow Q in FIG. 2. In this case, the profiling rotor 43 and the pressing rotor 50 are engaged with the circumferential surface of the workpiece from both the front and back sides, and the profiling operation of the cutting mechanism is performed while the clamping force is maintained. The cutter 10 can be applied well even to the marked corners, and the required beveling process can be uniformly performed on the edge of the material by one rotation of the rotary disk 29.

Further, according to the above-mentioned clamping and holding type, cutting can be performed stably especially in the case of a thin material, and the copying pressing force of the copying rotor 43 can be made as small as possible.

In addition, this beveling device is equipped with a balance weight 45 that balances the load applied to the cutting mechanism, so that when cutting each part of the workpiece, there is no imbalance in clamping force, and stable cutting action is achieved and high performance is achieved. It allows for precision machining.

As is clear from the above description of the embodiments, the present invention provides a clamping device for the workpiece material on one side of the machine base, and a supporting plate corresponding to the clamping device on the other side, and the supporting plate is provided with a rotary plate driven by a rotational drive mechanism, and the rotary plate further includes a moving body that is operated to move toward the center of the rotary plate by a movement operation mechanism, and a movable body fixed to the movable body,
and a cutting mechanism having a cutter rotated by a motor, and a profiling roller that rolls in contact with the outer circumferential surface of the workpiece is attached to the end of the cutter, and the movable body is provided with a profiling roller that rolls in contact with the outer peripheral surface of the workpiece material. It operates towards the trochanter.'
a This is equipped with a suppressing means that comes into contact with the inner circumferential surface of the material to be processed and holds the circumferential surface of the material to be processed under pressure together with the profiling trochanter, ensuring that the contouring movement against the curved surface of the material to be processed is performed and that beveling is possible. It exhibits excellent effects as it can be performed with high precision, automatically, and efficiently. It also has the effect of stably cutting thin-walled materials without chatter.

Furthermore, the present invention has a mechanism for adjusting the height of a rotary disk equipped with a cutting mechanism, so that the cutting mechanism can be applied to the center of the workpiece of any size to smoothly perform cutting. It has the effect that it can. Furthermore, by providing a balance weight that matches the load applied to the cutting mechanism, when cutting each part of the workpiece material, the imbalance of the clamping force is eliminated and the cutting action is stabilized, resulting in a constant and constant cutting action. If high-precision machining can be performed, the operation of the sister cutting mechanism can be performed smoothly and easily.

The present invention is not limited to the above embodiments, but can be embodied in the following embodiments.

(a) When the material to be processed is a round steel pipe, the configuration of the clamp device must be changed as appropriate to accommodate this material.

(b) The entire clamping device should be constructed so that it can be moved and adjusted in the front-back direction, so that the amount of bevel at which the workpiece material is clamped can be adjusted.

(＼) The receiving rollers and conveyor device should be actively driven to automatically carry in and out the workpiece material, and at the same time, the edge of the material should be brought into automatic contact with the ruler device.

(2) The rotating disc is provided with a rotating arm that operates toward the center of the rotating disc, and this rotating arm is equipped with a cutting mechanism and a suppressing means.

(E) Cutting I11 equipped with a pressing means 2. or more, and these cutting mechanisms are operated simultaneously to improve cutting efficiency.

Alternatively, the cutting mechanism may be equipped with various cutters so that any one can be used alone.

(-X) When two cutting mechanisms are provided at symmetrical positions and are operated simultaneously, they can be controlled by the same suppressing operation mechanism to simplify the configuration.

(g) Movement operation mechanism Currently, a torque motor, torque limiter mechanism (=I electric motor, etc.) is used as the driving member of the pressing means.

(4-) Prepare various copying trochanters with different diameters and use them interchangeably to change the opening amount setting.

(S) A chip removal fluid (liquid, air) is injected near the rolling side of the copying trochanter to prevent incorrect copying operations due to adhesion of chips.

(v) When groove processing a square steel pipe with a square cross section,
A detection means (for example, a limit switch) is provided to detect when the cutter of the cutting mechanism approaches the vicinity of the corner, and the rotary plate is rotated for a certain distance or a certain period of time based on this approach signal. To reduce the speed and correct the machining speed, (to provide a means to vary the rotational speed of the rotary plate according to the size of the workpiece to be glue-clamped).

(w) Turn the ruler device to position the workpiece material.
Prepare for the J board.

[Brief explanation of drawings]

The drawings show an embodiment of the beveling device according to the present invention, and FIG. 1 is a partially longitudinal side view, and FIG. 2 is an X shown in FIG. 1.
- A front view of the cutting device cut by X-rays. FIG. 3 is a front view of the clamp device seen from the Y-Y direction in FIG. 1. FIG. 4 is an explanatory diagram of the shape of the groove to be processed. 1: Machine stand 2: Horizontal bed 3 guide rail 4a, 4b: Pine pieces 8a, 8b: Support
9: Cross beam 10: Hydraulic cylinder 11: Press plate 12: Lifting adjustment means 14: Receiving roller 15: Rotating arm
16: Contact piece 18 Two hydraulic cylinders 21: Machine frame 21a121b: Vertical frame 21C: Cross beam 23: Support plate 24: Feed screw shaft 25: Nut cylinder
28: Recessed hole 29: Rotating plate 30: Trochanter 34: Recessed hole 35: Straight guide 36: Moving body 37: Hydraulic cylinder 38: Bearing tube
39 Nissin spindle 40: Cutter 43
= Copying trochanter 45: Balance weight 46; Cheno 4f: Nuproket 50: Pressing trochanter 51: Rotating arm 52: Oil field cylinder 52a: Pinton rod
53: Mounting stay SW: Photoelectric switch M11M2,
M3: Electric motor LS, LS2: Limit switch C: Conveyor device Applicant: Shinko Kogyo Co., Ltd. Figure 3

Claims (3)

[Claims] (1) A clamping device for the workpiece material is provided on one side of the machine base, and a support plate corresponding to the clamping device is provided on the other side, and a rotary plate driven by the support plate rotation drive mechanism is provided. The rotary plate further includes a moving body that is moved toward the center of the rotary plate by a moving operation mechanism, and a cutting mechanism that is fixed to the moving body and has a cutter that is rotated by a motor. Further, a copying rotor is attached to the end of the cutter that rolls in contact with the outer circumferential surface of the workpiece material, and the movable body operates toward the copying rotor marked mj to roll the workpiece material. A beveling device for a square steel pipe or the like, characterized in that it is provided with a suppressing means that comes into contact with the inner circumferential surface of the steel tube and holds the circumferential surface of the workpiece under pressure together with the copying trochanter. (2) @A clamping device for clamping the workpiece material at a fixed position is provided on one side of the machine base, and a support plate is provided on the other side of the machine base to accommodate this clamping device, and its vertical position can be adjusted freely. and the support plate is provided with a rotary plate driven by a rotary drive mechanism, and the rotary plate further includes a movable body that is operated to move toward the center of the rotary plate by a movement operation mechanism;
The movable body is equipped with a cutting mechanism having a cutter that is fixedly installed and rotated by a motor, and the end of the force/jitter has a copying roller that rolls in contact with the outer peripheral surface of the workpiece material. At the same time, the movable body sister moves toward the copying trochanter and comes into contact with the inner circumferential surface of the workpiece material,
A beveling device for a square steel pipe or the like, characterized in that it is provided with a copying trochanter and a pressing means for holding the circumferential surface of a workpiece material under pressure. (3) A clamping device for the workpiece material is disposed on one side of the machine base, and a support plate corresponding to the clamping device R is disposed on the other side, and the rotary plate is driven by a rotary drive mechanism on the support plate. Further, this rotary plate is provided with a moving body that is operated to move toward the center of the rotary plate by a moving operation mechanism, and a cutting machine that is fixedly attached to this moving body and has a power converter that is rotated by a motor. Equipped with a mechanism to prevent the above-mentioned forces and twists.
A copying rotor that rolls in contact with the outer peripheral surface of the workpiece material is attached to the end of the member, and a copying rotor that rolls in contact with the outer circumferential surface of the workpiece material is attached to the moving body, and a copying rotor that moves toward the copying rotor and contacts the inner peripheral surface of the workpiece material is attached to the moving body. , a suppressing means for holding the curved part of the workpiece material under pressure together with the copying trochanter is provided, and furthermore, a suppressing means is provided which is connected to the cutting mechanism and has a weight balanced with the load applied to the cutting mechanism (such as attaching a run weight). Beveling equipment for square steel pipes, etc.