JPS59161210A - Bevelling device for square pipe or the like - Google Patents

Abstract

PURPOSE:To carry out a bevelling work along the peripheral surface to be worked of, for example, a square pipe with a high degree of accuracy and a high degree of efficiency, by providing, in a rotatable rotary disc, at least two cutting mechanisms movable toward the rotating center of the disc, and as well by providing a contouring roll to the end of a cutter in each of the cutting mechanism. CONSTITUTION:Upon applying a desired bevelling work to the outer peripheral end edge of a square pipe, the vertical center of a material to be worked, which is set in a predetermined position, is at first aligned with the center position of a rotary disc 29, and pressing cylinders 37a, 37b are actuated under the condition of that cutters 40a, 40b are rotated. The cutters 40a, 40b are cut into the material to be worked until contouring rolls abut against the center section outer end edges on both top and bottom sides of the material, so that the bevelling work is initiated. That is, by rotating a gear 32 with the use of a motor M2, the rotary disc 29 which is rotatably supported on a supporting disc 23 by means of rolls 30... is rotated in the direction Q. Then, the contouring rolls 43 are always press-contacted with the outer periphery of the material under the action of the cylinders 37a, 37b so that the outer peripheral end edge of the material to be worked may be entirely subjected to the bevelling work.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a beveling device for forming a required beveling on the outer peripheral edge of various steel pipes such as square steel pipes and round steel pipes.

Conventionally, gas cutting has often been used to prepare bevels for various types of pipe materials, but when this method is used, the shape of the cut periphery is inconsistent or changes in quality, so it is not suitable for welding as is. Therefore, the defective cutting was manually corrected 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.

Therefore, in recent years, a type of cutter head has appeared that moves the cutter head in the X-axis and Y-axis directions using numerical control to perform beveling on the peripheral edge. Although this type of type can process the edges, that is, the flat surface, without any problems, The small rounded part in the corner could not be processed properly. Therefore, this part still has no choice but to rely on manual machining such as rounding, and from the viewpoint of improving productivity and machining accuracy, it is desirable to develop a beveling machine that can automatically machine up to this rounded part. Furthermore, this method has the problem that if the material to be processed is distorted in its cross section, it is not possible to precisely form a bevel on the outer peripheral edge of the material.

Based on such technical requirements, the present inventor previously filed a patent application in 1983.
- We have developed an automatic beveling device for square steel pipes, etc. according to No. 207922, and have provided it to the market, but this device has only one cutting mechanism, so its work efficiency is low. Undeniably, since cutting is performed by applying a large pressing force, a large-sized clamp for the workpiece material is required, and the cutting balance is not good.

The present invention is an improvement and extension of the previous invention, and aims to rationally solve the problems described above by using a plurality of cutting mechanisms.

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

The beveling machine according to the present invention has two basic components: a clamp device that clamps and fixes a workpiece material such as a square steel pipe (hereinafter simply referred to as a workpiece) in a predetermined position, and an outer peripheral edge of the workpiece. First, the configuration of the former clamping device will be described.

In FIGS. 1 to 3 of the drawings, the reference numeral 2 indicates a horizontal bed disposed on the front side of the machine 1 (at the right side in FIG. 1), and a third A horizontal guide rail 3 shown in the horizontal direction in the figure is installed on the west side.A pair of vice pieces 4a and 4b on both sides are engaged with this guide rail 3, and these vice pieces 4a and 4b are fixed to the lower part of the guide rail 3, respectively. The nut cylinders 5a and 5b are opened and closed in a centripetal manner by a feed screw shaft 6 having counter threaded portions screwed into the nut cylinders 5a and 5b.

The feed screw shaft 6 is supported by both ends of the guide tray lv3 and is free to rotate, and an opening/closing operation handle 7 is fixed to one end thereof.

In addition, the means for opening and closing the vice pieces 4a and 4b may include a hydraulic cylinder, an electric motor, etc.
It goes without saying that these things should be adopted 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 vise device is disposed, and a cross beam 9 is installed on these columns 8a and 8b so that the vertical position can be freely adjusted. And the piston rod 1 is placed in the center of this cross beam 9.
The hydraulic cylinder 10 is fixed with its 0a facing downward, and a press plate 11 is attached to the lower end of the piston rod 10a. In addition, in the above, the horizontal beam 9 is a screw type lifting adjustment means 12.
After the height has been set by , it is connected to the columns 8a, 8b by fixing pins 13.13, so that the press plate 11 can be adapted to workpieces having various dimensions.

Further, the reference numeral 14 is a roller for receiving processed materials arranged on the front side of the horizontal bed 2, and this roller for receiving 14 is arranged in line with the receiving surface 3a formed on the upper surface of the guide tray/L/3 described above. will be established. In this embodiment, a conveyor device C consisting of free rotating rollers is connected to the front side of the receiving rollers 14.

The workpiece is clamped from both sides by the vice pieces 4a and 4b, and is pressed from above by the pressing plate 11 to clamp and fix the workpiece in a fixed position.

Note that the clamp device is installed in the front and back direction (left and right direction in Figure 1).
It may also be configured to be connected in series.

Next, a description will be given of a ruler device that positions the workpiece while cutting the workpiece.

This ruler device protrudes to the front position of the workpiece when feeding the workpiece in order to abut the tip of the workpiece and determine its position.
(See Figure 1) Also, it is configured to be evacuated from there (see Figure 1) when clamping is completed and cutting is started. That is, reference numeral 15 is a rotating arm having an abutment piece 16 attached to its tip, and the other end of this arm is pivotally supported by a horizontal bearing metal 17 provided on the horizontal bed 2.

A hydraulic cylinder 18 is associated with this rotating arm 15 with the piston rod 18a facing upward, and when the piston rod 18a is extended, the abutting piece 16
is made to protrude upward so as to face the front side of the lower side of the workpiece.

Further, when the piston rod 18a is shortened, the abutment piece 16 is retracted downward from there.

Here, the abutment piece 16 is screwed and held by the rotating arm 15, and its position can be adjusted in the front and rear direction.
The root face of the cutting surface during machining can be set as required by making it possible to finely adjust the mounting position of the workpiece relative to the cutter, which will be described later.

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 corresponding to the clamping device side. Reference numeral 21 denotes a machine frame disposed on the rear side of the machine frame 1 (left position in FIG. 1). A pair of vertical frames 21 and 21 are installed on both sides of the machine 1.
b, and a cross beam 21G connecting the upper ends of these vertical frames 21a and 21b, forming a gate shape.

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

Further, the horizontal beam 21e supports a pair of feed screw shafts 24124 facing downward and freely rotating, and the feed screw shafts 24.24 are attached to nut cylinders 25.25 fixed to the upper end of the support plate 23. The vertical position of the support plate 23 is adjusted by screwing them together and rotating them.

The feed screw shafts 24,24 are associated with an electric motor M via a transmission gear means 26,26 and an interlocking shaft '27 provided at their respective upper ends, and this electric motor M1
Rotation is driven by forward/reverse rotation control.

Next, in the center of the support plate 23 is a large circular recessed hole 2.
8 is bored, and a circular rotary member 29 is rotatably provided in the recessed hole 28 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 groove rotation drive mechanism is the gear 3 carved on the outer peripheral surface of the support plate 29.
1, a pinion 33 connected to this gear 31 through an intermediate gear 32, and an electric motor M2 with a reduction gear that has the pinion and on gear 33 fixed to the output shaft. The rotary disk 29 is rotated at a constant speed in the direction indicated by arrow Q 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.

In addition, a straight and wide recessed hole 34 is bored in the center of the rotary disk 29, and the inner wall of this recessed hole 34 has a direction of -° in the same direction as the center line of the rotary disk 29. Pair of linear guides 35 a
and 35b are provided. This straight line guide 3
5a and 35b have moving bodies 36a and 36, respectively.
b is slidably engaged with the movable bodies 36a and 36b, and each of the movable bodies 36a and 36b is provided with a cutting mechanism and a suppression operation mechanism for suppressing the cutting mechanism toward the center of the rotary plate 29. It will be done.

To explain the Ushizu pressing operation mechanism, this robot has an X linear guide 3535 on the front side of the rotary plate 29.
It is composed of hydraulic cylinders 37a and 37b arranged in parallel with the cylinders 37a and 37b, whose respective piston rods 37; 37' are connected to the movable bodies 36a and 36b, and the cylinder tube 37' : The 37' side is tied to the peripheral edge of the rotary disk 29. and the piston rod 31
When the piston rod 3τ37' is contracted, the movable bodies 36a and 36b are moved in a direction approaching the center of the rotary disk 29, and when the piston rod 3τ37' is extended, they are moved in a direction away from the center.

Further, the hydraulic cylinders 37a and 37b have oil supply and discharge oil restrictions 9.
By connecting the means, the moving speed of the movable bodies 36a and 36b can be adjusted as appropriate.

Next, the cutting mechanism first attaches and fixes the bearing sleeves 38a and 38b to the movable bodies 36a and 36b, and
A spindle zlz39a139b is rotatably supported by 8a and 38b. And these spindo/V 39 a
, 39b are made to protrude forward (to the right in FIG. 1), and cutters 40a and 4.013 are attached to the tips.

Gears 41a and 41b are fixed to the other end, and electric motors M3 and M3 are associated with the gears 41a and 41b via gears 42a and 42b. The cutters 40a and 40b are fly cutters having an umbrella-shaped cutting edge, and the angle of the groove that can be cut is determined by the slope (corner angle) of the cutter. Therefore, this fly cutter is prepared in various ways depending on the applicable beveling angle, and is installed in a replaceable manner.

Further, a cutter 40a is installed at the end of the spindles 39a and 39b immediately before the cutters 408 and 40b.
, 40b, the copying trochanters 43 and 4 have approximately the minimum diameter size.
3 is supported for free rotation. When the cutting device is moved toward the center, the copying rollers 43, 43 come into contact with the outer circumferential surface of the workpiece, and the cutters 40a and 40
This determines the position of b.

Next, in FIG. 2, reference numeral L81 is a limit switch' associated with the docks 44a and 44b attached to the rotary disk 29, and this limit switch LSI controls the half-round movement of the rotary disk 29 and its stroke end position. Control. Incidentally, in this embodiment, the initial cut by the cutting mechanism is set in the vertical direction, that is, the vertical direction, as shown in FIG. Further, the docks 44a and 44b are arranged with a rotational phase difference of 180''.
S2 and LS2 are limit switches that detect 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 drive of various actuators such as the electric motor and hydraulic cylinder. It is something.

Reference numerals 45a and 45b refer to loads applied to the movable bodies 36a and 36b, i.e., balance weights having a weight equivalent to the sum of the weight of the movable bodies 36a and 36b and the cutting mechanism. The bearing tubes 38a and 38b of the mechanism are connected by chains 46 and 46, and each chain 46, 46 is connected to a sprocket 47.
47 to balance the two.

Now, in order to perform the required beveling on the outer circumferential edge of the square pipe using the beveling device configured as described above, first set the spindles 39 FL and 39 b to a beveling machine of the same shape with the required bevel cutting angle. The cutters 40 a and 40 b are attached, and then copying trochanters 43 and 43 having the same diameter are pivotally supported at their tips. After the cutters 4.0a and 40b have been installed, the workpiece on the conveyor device C is fed 9 to above the receiving surface 3a of the guide rail 3 in the clamping device, and its tip is connected to the protruding abutment piece. 16 for positioning.

When the tip processing position of the workpiece is determined as described above, the abutment piece 16 is retracted downward, and the workpiece is clamped and pressed from the left and right sides by the pair of vice pieces 4a and 4bi on both sides, and further the suppression plate 11 The material is pressed from above and firmly clamped. In this case, the center of the workpiece in the left and right direction is fixed to the rotary plate 2 by the centripetal vice pieces 4a and 4b.
It is exactly aligned with the center of 9.

In addition, when the workpiece is set as described above and the cutters 40 & 40b are cut from above, the outer peripheral edge of the material has the required root face and bevel as shown in Figure 4. The positions of each part and the contact piece 16 are set in advance so that the angle θ is cut. The adjustment of the root face in the above is done by adjusting the abutment piece 16 back and forth, but the adjustment amount for one trench is based on a conversion table based on the material thickness, bevel angle, and root face. Determined based on. 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 to the right under the control of the electric motor M1, and when it is done in this way, it is pushed toward the center of the rotation 1+r 23. The cutting mechanism is the rotation of this rotary disk 23.ii/
When displaced along with I, the pressing force can be applied almost equally to any of the peripheral edges of the workpiece, that is, the top and bottom, left and right sides, and four corners.

Once the inspection of each part has been completed, the cutter 40a,
40b is rotated, hydraulic cylinders 37a and 37b, which are suppression operation mechanisms, are operated, and both moving bodies 3
6a and 36b, the cutting mechanism is moved toward the center of the rotary disk 29. In this way, the cutters 40a, 4. The ob is cut and its movement is stopped, and this cut portion forms a required groove shape.

When the cutting operation of the cutter 408.40b is completed, the rotary drive mechanism is operated while the pressing operation mechanism is kept operating, and the rotary disk 29 is rotationally driven in the direction of arrow Q in FIG. 2. In this way, the copying trochanter 43 is always pressed against the outer periphery of the material and rolls due to the suppression operation mechanism, and not only the flat sides but also the rounded corners are shaped like this and the edges are shaped like this. The edges are cut, and the rotation is 6
The required beveling process is performed uniformly on the entire circumferential edge of the material by making 29 half turns of 1 g.

In addition, in this embodiment, the two cutting mechanisms are arranged symmetrically with respect to the center in the operating direction, so the workpiece material is held stably by the operating pressing force, so the clamping is reliable. A beautiful cut surface with good cutting balance can be obtained.

Furthermore, by providing balanno weights 45a and 45b that balance the load applied to the cutting mechanism, when cutting each part of the workpiece, there is no imbalance in pressing force and stable cutting action can be achieved and high precision machining can be achieved. It is something.

Note that the present invention is not limited to the above embodiments, but can also 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 light opening can be adjusted while the workpiece q is being clamped.

(c) The receiving rollers and conveyor device should be actively driven to automatically withdraw and carry out the liquid processed material, and at the same time, the edges of the material should be brought into automatic contact with the ruler device.

(d) The rotary disc is provided with a rotary arm that operates toward the center of the rotary disc, and this rotary arm is equipped with a cutting mechanism.

(e) When the cutting mechanisms are operated simultaneously, they should be controlled by the same suppression operation mechanism to simplify the configuration.

(f) Use a torque motor, an electric motor with a torque limiter mechanism, etc. as the push operation mechanism.

(G) 'Prepare various copying trochanters with different diameters and use them interchangeably to change the brightness setting.

(H) A chip removal fluid (
(liquid, air) to prevent erroneous copying operations.

(S) Detection means (for example, a limit switch) that detects when the cutter of the cutting machine groove touches the vicinity of the corner when groove processing is performed on a square steel pipe with a square cross section.
The rotational speed of the rotary plate is decelerated by a certain distance or a certain period of time based on this detection signal, thereby correcting the machining speed.

(v) Provide a means to vary the rotational speed of the rotary plate according to the size of the workpiece material to be clamped.

Furthermore, although this is not the gist of the present invention, the cutting mechanism, which is a main component of the present invention, is operated to suppress the cutting mechanism outward from the center of the rotary plate by means of a pressing operation mechanism, and the copying trochanter is pressed against the workpiece. By bringing it into contact with the inner circumferential surface of the material, the inner surface of the tube can be beveled. In this case, the copying trochanter must be set to a diameter smaller than the minimum radius existing within the tube.

As is clear from the above description of the embodiments, the present invention includes a machine base equipped with a rotary disk that is driven and operated by a rotary drive mechanism, and furthermore, this rotary disk is operated by a pressing operation mechanism to rotate the rotary disk. The cutting mechanism of a set of cutters that moves toward the center of rotation has at least two
The cutting mechanism is arranged symmetrically with respect to the center of rotation, and the end of the cutter is provided with a copying rotor that transmits power by contacting the outer peripheral surface of the workpiece material. It has the excellent feature of being able to perform beveling along the circumferential surface of square steel pipes etc. with high precision, automatically and with high efficiency using the profile cutting method. In addition, multiple cutting mechanisms are arranged symmetrically with respect to the rotation center,
By operating these simultaneously, the slope of the material is held stably, resulting in the effect of obtaining a stable cutting surface with excellent cutting balance.

4゜Additional Relationship The present invention is disclosed in [Patent Application No. 2'07922 of 1982]
The machine base is equipped with a rotating/moving plate driven by a rotary drive mechanism,
Furthermore, this rotary disk is equipped with a cutting mechanism of a set of cutters that are moved toward the center of rotation of the rotary disk by a pressing operation mechanism, and furthermore, the cutter has an end that is in contact with the outer peripheral surface of the workpiece material. The main parts of the essential matters for the construction of a "beveling device for square steel pipes, etc. characterized by the provision of a transmission copying trochanter" are the main parts of the essential matters for the construction of the invention. Since it is an invention and achieves the same purpose as the original invention, it satisfies the requirements for a Class 1B patent as stipulated in Article 31, Item 1 of the Patent Law.

[Brief explanation of the drawing]

The drawings show an embodiment of the beveling device according to the present invention, and No. 11:1 is a partially longitudinal side view. Fig. 2 is a front view of the cutting device taken along line X-X shown in Fig. 1. Figure 3 is the first
FIG. 4 is an explanatory diagram of the shape of the groove to be machined. FIG. 5 is a side view of the positioning ruler device applied to the present invention. 1: Machine base 2: Horizontal bed 3: Guide tray/L/ 4a, 4b: Binu piece 8a
18b: Support column 9: Cross beam 10: Hydraulic cylinder 11: Pressing plate - [2: Lifting adjustment means 14: Receiving roller 15: Rotating arm 16: Contact piece 18: Hydraulic cylinder 21: Machine frame 21a, 21b: Vertical frame 21C: Cross beam 23: Support plate 24: Feed screw shaft 25: Nut tube 2
8: Recessed hole 29: Turning plate 30: Trochanter 34: Recessed hole 35a, 35b: R-line guide 3
6a, 36b: Moving body 37a, 37b: Hydraulic cylinder 38a, 38b: Bearing tube 39a, 39b
: Spindle 40B, 40b: Cutter 43: Copy trochanter 45B, 45b: Balance weight 46: Cheno 47: Sprocket Ml, M
2, M3: Electric motor LS1, LS2: Limit switch C: Conveyor equipment output Shinko Kogyo Co., Ltd.

Claims (1)

[Claims] The machine base is equipped with a rotary disk that is driven and operated by a rotary drive mechanism, and the rotary disk is equipped with at least two cutting mechanisms of a set of cutters that are moved toward the center of rotation of the rotary disk by a pressing operation mechanism. The cutting mechanism is arranged symmetrically with respect to the center of rotation of the rotary disk, and the end of the cutter is provided with a roller that rolls in contact with the outer peripheral surface of the workpiece material. Beveling equipment for square steel pipes, etc., characterized by having a copying trochanter.