JP3606009B2 - Screw tightening completion position detecting device, marking device and method using screw gauge - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is, for example, like the tapered thread provided on the end of an oil well pipe, apparatus and method for detecting completion position the fastening with screws gauge for detecting the clamping completion position of the screw having a sealing function, and The present invention relates to an apparatus and a method for marking the tightening completion position.
[0002]
[Prior art]
For example, in the case of the oil well pipe 2, depending on the shipping destination, a marking M as shown in FIG. 13 or FIG. It may be required to apply. As a means for detecting or marking the tightening completion position, conventionally, as shown in FIG. 15, the operator fits the stop mark gauge 1 to the pipe end screw portion 2 a provided at the end of the oil well pipe 2. The position in the circumferential direction is detected by, and the marking M is applied by manually spraying or engraving the detected position. Alternatively, a coupling-like screw gauge 3 as shown in FIG. 16 is screwed into the pipe end thread portion of the oil well pipe by rotating the oil well pipe or the screw gauge, and the tightening completion position is detected. Marking was performed on the detection position by a marking device.
[0003]
[Problems to be solved by the invention]
By the way, when the detection and marking of the tightening completion position are performed on-line, when relying on the conventional artificial work, it is necessary to always place an operator at the detection and marking position. Further, in the case where the tightening completion position is mechanically detected by the coupling-shaped screw gauge, it is necessary to accurately align the center of the pipe end screw portion and the coupling-shaped screw gauge. This is because if the centering is not performed accurately, a screwing failure occurs or a screw thread is damaged. In addition, in this manual operation or mechanical detection method using a coupling thread gauge, it takes time for detection and marking after detection, so that the efficiency of the line is lowered.
[0004]
The present invention has been made in view of the conventional problems described above, the detection device and method of detecting and clamping completion position using screws gauge that allows the marking automatically clamping completion position and the marking device and method The purpose is to provide.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention , a thread gauge having a hook shape and having an inner surface provided with a screw that fits the screw is employed . And by making it into a hook shape, the screw gauge can be easily fitted to the pipe end thread portion, and accurate centering is not required.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The tightening completion position detecting device of the present invention includes a hook-shaped screw gauge provided on the inner surface with a screw that fits a screw having a sealing function provided at an end of a pipe, and the pipe stopped at a predetermined position. A rotating mechanism that rotates at the stop position, an approach feed mechanism that lifts and positions the screw gauge on the pipe end thread of the pipe located on the rotating mechanism, and a lifting mechanism, and the pipe that rotates with the screw gauge fitted When the screw gauge is tightened, a floating mechanism that allows the screw gauge to follow the eccentricity of the tube and the bending of the nose and a detection mechanism that detects the completion of the tightening are provided .
[0007]
The tightening completion position marking device of the present invention includes the above-described tightening completion position detection device and a marking mechanism for marking the tightening completion position detected by the tightening completion position detection device .
[0008]
In the present invention, since the thread gauge is formed in a bowl shape, the fitting with the pipe end thread portion can be easily performed.
Further, in the tightening completion position detecting device of the present invention, the approach feed mechanism and the lifting mechanism are operated with respect to the pipe stopped on the rotating mechanism, and the screw gauge is positioned on the pipe end thread portion of the pipe and fitted. Let Then, the tube is rotated in a state in which the screw gauge is fitted by operating the rotation mechanism, and the screw gauge is tightened. When the screw gauge is tightened, the screw gauge follows the eccentricity and the nasal bending by the action of the floating mechanism even if the tube is eccentric and the nasal bending. The completion of tightening is detected by a detection mechanism. This is the tightening completion position detection method of the present invention.
[0009]
Further, clamping completion position marking method of the present invention, the clamping completion position detected by said clamping completion position detecting apparatus constituting the marking device position of the present invention, in which markings in the marking device.
[0010]
【Example】
Hereinafter, the present invention will be described based on the embodiments shown in FIGS.
FIG. 1 is a perspective view showing an embodiment of a screw gauge constituting the present invention, FIG. 2 is a view showing an example of a mounting fitting for the screw gauge shown in FIG. 1, (a) is a left side view, and (b) is a left side view. FIG. 3 is a front view, FIG. 3 is a right side view, FIG. 3 is a front view showing an embodiment of a tightening completion position marking device of the present invention when only a spray marker is provided as a marking mechanism, and FIG. FIG. 5 is a plan view of FIG. 3, and FIG. 6 is a diagram showing an approach feeding mechanism, a tightening completion detection mechanism, and a marking mechanism in an embodiment provided with a marking marker and a spray marker as a marking mechanism. 7 is a right side view of FIG. 6, FIG. 8 is a left side view of FIG. 6, FIG. 9 is a view showing the spray marker in FIG. 6, and FIG. 10 is a case where the fastening completion position marking device of the present invention is used. Rotation mechanism speed pattern FIG. 11 is a diagram showing an example in which marking is performed at the tightening completion position of the pipe using the tightening completion position marking device of the present invention, and FIG. 12 shows another example similar to FIG. FIG.
[0011]
1 to 12, reference numeral 11 denotes a screw gauge constituting the present invention. For example, an oil well which is formed in a bowl shape obtained by dividing a cylinder at an angle of 120 [deg.] Of the circumference and is intended to detect the tightening completion position on the inner surface. This is a configuration in which a screw 11 a to be fitted to the tube end screw portion 2 a of the tube 2 is provided. The screw gauge 11 of the present invention is used by being attached to a mounting bracket 12 as shown in FIG. 2, for example.
[0012]
According to the root Ji gauge 11 thus constructed, which the upper and lower oil well pipe 2, after pressing the right or left direction in the tube thread portion 2a, only by rotating the oil well pipe 2, thread gauge 11 Tightening is completed at the same position as the case where the pipe end thread portion 2a is easily fitted and a conventional coupling-type thread gauge is used. Therefore, it is not necessary to perform accurate centering as in the case of using a conventional coupling screw gauge.
[0013]
Incidentally, the gauge 11 Ji above seed as long as it can ensure accuracy and prevent deformation, After preparing coupling shaped thread gauge, etc. to be divided at an arbitrary angle in the circumferential direction, a method of manufacturing the same Does not matter. However, division angle, the outer diameter of the tube, it is necessary to determine the gauge 11 Flip splashing there have stability when mated to the tube thread portion 2a of the oil well pipe 2, to confirm the detection precision.
[0014]
Next, the fastening completion position marking device of the present invention provided with the above-described screw gauge 11 will be described.
Reference numeral 13 denotes a rotation mechanism, for example, a turning roller, which rotates the oil well pipe 2 stopped at a predetermined position on the spot.
[0015]
Reference numeral 14 denotes a first lifting mechanism installed on the frame 16, which detects a tightening completion position and guides a guide 16 a provided on the frame 16 according to the outer diameter size of the oil well pipe 2 that performs marking at the position. The height position of the arm 17 laid sideways so as to freely move up and down is adjusted. The first elevating mechanism 14 transmits, for example, forward / reverse rotation of the output shaft of the motor 14a to the first bevel gear 14c via the power transmission shaft 14b, and meshes with the first bevel gear 14c. By transmitting to the ball screw 14e via the bevel gear 14d, the arm 17 is moved up and down along the guide 16a via the nut 14f screwed to the ball screw 14e.
[0016]
Reference numeral 15 denotes an approach feeding mechanism. The oil well pipe 2 is stopped on the turning roller 13 in a state where the height of the arm 17 is adjusted by the first lifting mechanism 14 according to the outer diameter size of the oil well pipe 2. Then, the slide carriage 18 disposed on the arm 17 laid sideways in the axial direction of the oil well pipe 2 is made to approach the axial direction of the oil well pipe 2 along the guide 17 a laid on the upper surface of the arm 17. It is. The approach feed mechanism 15 transmits, for example, forward / reverse rotation of the output shaft of the motor 15a to the ball screw 15b, and moves the slide carriage 18 along the guide 17a via a nut 15c screwed to the ball screw 15b. It is a configuration.
[0017]
Reference numeral 19 denotes an end face detection sensor that detects the end face of the oil well pipe 2 when the slide carriage 18 moves close to the axial direction of the oil well pipe 2 by the approach feed mechanism 15, and approach feed is detected when the end face detection sensor 19 detects the end face. The mechanism 15 is stopped. The end face detection sensor 19 is not limited to the non-contact type shown in the present embodiment, and may be a contact type as long as it can detect the end face of the oil well pipe 2.
[0018]
A second elevating mechanism 20 detects the end face of the oil well pipe 2 and lowers the screw gauge 11 suspended on the slide carriage 18 via a floating mechanism 21 and the like, which will be described later, after the approach feed mechanism 15 is stopped. It is an air cylinder for raising and lowering. Then, the rod gauge of the air cylinder 20 protrudes and the screw gauge 11 is guided by the guide 22 to be lowered and brought into contact with the pipe end screw portion 2 a of the oil well pipe 2 stopped on the turning roller 13. Thereby, the screw 11a of the screw gauge 11 and the pipe end screw part 2a of the oil well pipe 2 are fitted. When the screw 11a and the pipe end screw portion 2a are not fitted by this contact, the turning roller 13 may be slightly rotated in the screw tightening direction.
[0019]
21, after the screw gauge 11 and the oil well pipe 2 are fitted as described above, even when the oil well pipe 2 is eccentric or nose bent when the screw gauge 11 is tightened by the rotation of the turning roller 13, This is a floating mechanism for causing the screw gauge 11 to follow the oil well pipe 2 with certainty. The floating mechanism 21 has, for example, a floating block 21a provided with a spring inside at four corners as shown in FIG. 5 and a cylinder 21b that absorbs the lateral vibration, in order to absorb vertical vibration. As shown in FIG. 5, it is the structure arrange | positioned in two places.
[0020]
When the thread gauge 11 is tightened to the pipe end threaded portion 2a of the oil well pipe 2 by the rotation of the turning roller 13, the movement along the first guide frame 28 installed below the floating mechanism 21 is free. The screw gauge 11 suspended from the first guide frame 28 and the tightening completion stopper 23 disposed on the frame 16 side from the screw gauge 11 move together in the axial direction of the oil well pipe 2. Then, when the end surface of the oil well pipe 2 comes into contact with the fastening completion stopper 23, the rotation of the turning roller 13 is stopped and the fastening is completed. The installation position of the tightening completion stopper 23 is set in advance using, for example, a stopper adjusting device 24 including a linear gauge 24a and a fixing device 24b. An example of the control pattern of the rotational speed of the turning roller 13 at this time is shown in FIG. The deceleration position in FIG. 10 is detected by optical means.
[0021]
Reference numeral 25 denotes a marking mechanism installed so as to be movable along a second guide frame 29 installed below the first guide frame 28, and includes a marking marker 26 and a spray marker 27. . Then, by selecting these, three kinds of markings are possible, which are only the marking mark, the marking and the spraying mark, or only the spraying mark.
[0022]
Among these, as shown in FIG. 6, for example, the marking marker 26 includes a longitudinal feed motor 26d and a ball screw that move an end mill 26b rotated by a rotation motor 26a in the axial direction of the oil well pipe 2 along the longitudinal feed guide 26c. 26m, a transverse feed motor 26f that moves in a direction perpendicular to the axis of the oil well pipe 2 along the transverse feed guide 26e, and a lift actuator 26h that moves up and down along the lift guide 26g, for example, as shown in FIG. 11, a configuration for performing marking M ₂ of the required on the outer peripheral portion of the marking M ₁ blown onto the predetermined position of the oil well pipe 2 by spraying markers 27 to be described later.
[0023]
Reference numeral 26i denotes a descending amount of the end mill 26b by the lift actuator 26h, that is, a marking depth setting mechanism for setting a marking depth, 26j denotes a purge nozzle for blowing off chips at the time of marking by the end mill 26b, and 26k denotes an oil well pipe 2 by the end mill 26b. It is a marking fitting detection apparatus which detects contact | abutting to the surface of this. The marking fitting detecting device 26k is retracted to the raised position as indicated by an imaginary line in FIG. 6 when marking by the end mill 26b.
[0024]
The spray marker 27 is moved in the axial direction of the oil well pipe 2 together with the marking marker 26 by the vertical feed motor 26d. For example, as shown in FIG. 9, a spray nozzle 27a is provided at the lower portion. , while moving from the spray starting position in the axial direction of the oil well pipe 2 by blowing paint 27b from the spray nozzle 27a, for example, as shown in FIG. 11, those markings M ₁ to a predetermined position of the oil well pipe 2 It is. In the present embodiment, the spray nozzle 27a is disposed so as to be inclined obliquely in plan view as shown in FIG. 5 so that it can be adapted to the oil well pipe 2 of any outer diameter. Reference numeral 27 c denotes a detection device that detects the distance from the spray nozzle 27 a to the surface of the oil well pipe 2.
[0025]
The tightening completion position marking device of the present invention is configured as described above. Next, the present invention method for marking after detecting the tightening completion position of the oil well pipe 2 using this tightening completion position marking device will be described.
[0026]
The first lifting mechanism 14 is operated to adjust the height of the arm 17 according to the outer diameter size of the oil well pipe 2. Then, after adjusting the height of the arm 17, when the oil well pipe 2 stops on the turning roller 13, the approach feed mechanism 15 is operated to bring the slide carriage 18 closer to the axial direction of the oil well pipe 2. Then, when the end face detection sensor 19 detects the end face of the oil well pipe 2, the approach feed mechanism 15 is stopped.
[0027]
Next, the rod of the air cylinder 20 is protruded and the screw gauge 11 is lowered to come into contact with the pipe end thread portion 2a of the oil well pipe 2 stopped on the turning roller 13, and the screw 11a of the screw gauge 11 and the oil well pipe The two pipe end screw portions 2a are fitted. When the screw 11a and the tube end screw portion 2a are not fitted, the turning roller 13 is slightly rotated in the screw tightening direction.
[0028]
After the screw gauge 11 and the oil well pipe 2 are fitted, the turning roller 13 is rotated to tighten the screw gauge 11. At this time, due to the action of the floating mechanism 21, the screw gauge 11 can be made to follow the oil well pipe 2 even when the oil well pipe 2 is eccentric or has a nasal curve. When the end surface of the oil well pipe 2 comes into contact with the tightening completion stopper 23, the rotation of the turning roller 13 is stopped in a state where the end surface is pressed against the tightening completion stopper 23. Then, when the timer ends, the operation stops and the tightening is completed. Thereby, the tightening completion positioning can be performed with high accuracy and the tightening completion position can be detected. This is the tightening completion position detection method of the present invention.
[0029]
After detecting the tightening completion position, the longitudinal feed motor 26d, the lateral feed motor 26f, and the lifting actuator 26h are operated to move the end mill 26b in a three-dimensional direction, or the vertical feed motor 26d is operated to spray nozzles. 27a is moved in the axial direction of the oil well pipe 2, and the marking M2 is applied to a predetermined position of the oil well pipe 2, or the marking M1 is applied. This is the fastening completion position marking method of the present invention.
[0030]
After the marking, the rod of the air cylinder 20 is retracted to raise the screw gauge 11, the marking mechanism 25, etc., and then move to the standby position and wait for the arrival of the next oil well pipe 2.
[0031]
In the above-described embodiment, the case where the marking M ₂ and the marking M ₁ are applied to the positions as shown in FIG. 11 after detecting the tightening completion position has been described, but the order of applying the marking M ₂ and the marking M ₁ is described above. The present invention is not limited to the embodiment. For example, when marking M ₂ and marking M ₁ are performed at positions as shown in FIG. 12, the approach feed mechanism 15 is activated, the end face detection sensor 19 detects the end face of the oil well pipe 2, and the approach feed mechanism 15 is stopped. After that, the longitudinal feed motor 26d and the lateral feed motor 26f are operated to move the end mill 26b to the marking start position. Thereafter, the air cylinder 20, by operating the elevating 26h down the end mill 26b, longitudinal feed motor 26 d, to operate the cross-feed motor 26f is subjected to marking _{M 2,} then, similarly to the above by spraying marker 27 it may be subjected to marking _{M 1.} That is, the order of the marking M ₂ and the marking M ₁ may be appropriately changed so that the marking M ₂ and the marking M ₁ can be performed with a cycle time as short as possible.
[0032]
Although the above described clamping completion position marking device of the present invention with a bouncing Flip gauge 11 in the embodiment described above, if it is only detection of the clamping completion position may be omitted relate marking mechanism 25 . This is the fastening completion position detecting device of the present invention.
[0033]
In this embodiment, the first lifting mechanism 14 for adjusting the height position of the arm 17 according to the outer diameter of the oil well pipe 2 and the second lifting mechanism (air cylinder 20) for lowering the screw gauge 11 are used. However, it is needless to say that both may be performed by one lifting mechanism. Moreover, when installing for every size of the oil well pipe 2, the 1st raising / lowering mechanism 14 is unnecessary.
[0034]
In this embodiment, the detection of the pipe end is performed by the end face detection sensor 19, but if the stop position of the oil well pipe 2 on the turning roller 13 is fixed, the approach feeding mechanism is disclosed. The stop position may be fixed by control 15.
[0035]
In addition, the various drive mechanisms and power transmission mechanisms described in the present embodiment are merely examples, and the present invention is not limited thereto. Therefore, as long as the same action can be performed, a lead screw feed mechanism, a rack and a pinion may be used instead of the cylinder device, and vice versa.
[0036]
【The invention's effect】
As described above, according to the present invention , since the thread gauge is formed in a bowl shape, it is not necessary to perform accurate centering and can be easily fitted to the tube end thread portion. Therefore, the work time required for detecting the tightening completion position can be shortened.
[0037]
Moreover, by employing the above noted seed Ji gauge, can be detected automatically by remote control, yet complete clamping position with high accuracy.
[0038]
Similarly, the detected position in the previous SL clamping completion position detecting device, automatically remotely, yet can be subjected to a marking with high accuracy.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a screw gauge constituting the present invention.
FIGS. 2A and 2B are diagrams illustrating an example of a mounting fixture for the screw gauge illustrated in FIG. 1, in which FIG. 2A is a left side view, FIG. 2B is a front view, and FIG.
FIG. 3 is a front view showing an embodiment of a tightening completion position marking device of the present invention when only a spray marker is provided as a marking mechanism.
4 is a view taken along the line AA in FIG. 3;
FIG. 5 is a plan view of FIG. 3;
FIG. 6 is a diagram showing an approach feed mechanism, a tightening completion detection mechanism, and a marking mechanism in an embodiment provided with a marking marker and a spray marker as a marking mechanism.
7 is a right side view of FIG. 6. FIG.
FIG. 8 is a left side view of FIG.
9 is a view showing the spray marker in FIG. 6 taken out.
FIG. 10 is a diagram showing an example of a speed pattern of a rotating mechanism when the fastening completion position marking device of the present invention is used.
FIG. 11 is a diagram showing an example in which marking is performed at a tightening completion position of a pipe using the tightening completion position marking device of the present invention.
FIG. 12 is a view showing another example in which marking is performed at a tightening completion position of a pipe using the tightening completion position marking device of the present invention.
FIG. 13 is a diagram showing an example of a marking completion position of a taper screw provided at an end portion of an oil well pipe and a marking M provided on a coupling connecting the oil well pipe.
FIG. 14 is a diagram showing another example of a tightening completion position of a taper screw provided at an end portion of an oil well pipe and another example of a marking M applied to a coupling for connecting the oil well pipe.
FIG. 15 is an explanatory diagram of a method for detecting a tightening completion position using a stop mark gauge.
FIG. 16 is an explanatory diagram of a method for detecting a tightening completion position using a coupling-shaped screw gauge.
[Explanation of symbols]
2 Oil Well Pipe 2a Pipe End Thread 11 Thread Gauge 11a Thread 13 Turning Roller 14 First Lifting Mechanism 15 Approach Feeding Mechanism 20 Air Cylinder 21 Floating Mechanism 23 Tightening Complete Stopper 25 Marking Mechanism

Claims (4)

A saddle-shaped thread gauge provided with a screw that fits into a screw on an inner surface having a sealing function provided in an end portion of the tube, a rotation mechanism for the tube is stopped at a predetermined position is rotated at the stop position, the When tightening the screw gauge by rotating the tube with the thread gauge fitted and the approach feed mechanism and lifting mechanism for positioning and fitting the screw gauge to the pipe end thread portion of the pipe located on the rotating mechanism, A tightening completion position detecting device comprising: a floating mechanism that causes a screw gauge to follow eccentricity or bending of a nose; and a detection mechanism that detects completion of tightening. A fastening completion position marking device comprising: a fastening completion position detecting device according to claim 1; and a marking mechanism for marking a fastening completion position detected by the fastening completion position detecting device. A method for detecting a tightening completion position using the apparatus according to claim 1, comprising:
To have been stopped on the rotating mechanism tube fitted position the saddle-shaped thread gauge provided with a screw that fits into the pipe end threaded portion of the tube by approach feed mechanism and the lift mechanism to the inner surface, this by a rotating mechanism A tightening completion position detecting method , comprising: rotating a pipe in a state, tightening a screw gauge while following the eccentricity and nose bending of the pipe by a floating mechanism, and detecting the tightening completion position by a detection mechanism . A method of applying a marking to complete clamping position by using the equipment according to claim 2,
The pipe stopped on the rotating mechanism is fitted and positioned with a hook-shaped thread gauge with a screw that fits on the pipe end thread of the pipe by the approach feed mechanism and the lifting mechanism. In this state, the tube is rotated, the screw gauge is tightened while following the eccentricity and nose curve of the tube by the floating mechanism, and then the marking mechanism is used to mark the tightening completion position detected by the detection mechanism. Tightening completion position marking method.

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