JP3193603U - End processing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an end processing apparatus capable of suppressing a misalignment when transporting a work material to a processing position and reducing an installation space and equipment cost. SOLUTION: A chuck 12 for rotating a work material 71, a processing tool 11 for processing an end portion of the work material 71, and a support device 20 for rotatably sandwiching the work material 71 by support rollers 24 on both sides. The transfer roller 50 that moves the work material 71 in the longitudinal direction and conveys it to the processing position, and the work material at the entry side position is transferred to the transfer roller 50, and the work material on the transfer roller 50 is ejected. A transfer device 30 for transferring to a side position is provided, and the transfer device 30 moves a kicker 31 that guides the work material arranged on the upper side by rotationally moving the kicker 31 and the kicker 31 in the vertical direction. The elevating device 32 is provided, and the kicker 31 has a first guide surface that becomes lower as it approaches the exit side position and a second guide surface that becomes lower as it moves away from the entrance side position. [Selection diagram] Fig. 1

Description

  The present invention relates to an end processing apparatus including a chuck that holds and rotates a workpiece (for example, a steel pipe) whose outer surface is a cylindrical surface, and a processing tool. More specifically, the present invention relates to an end processing apparatus that can suppress a positional shift when a workpiece is conveyed to a processing position and can reduce installation space and equipment cost.

Unless otherwise stated, the definitions of terms in this specification are as follows.
“Work material”: a material whose outer surface is a cylindrical surface and is processed by an end processing apparatus. For example, a tubular material or a rod-shaped material is applicable, and more specifically, a steel pipe or a round steel is applicable.

  In the manufacture of steel pipes and round steels, chamfering, groove processing, and screw processing may be performed on the end portions, and an end processing apparatus is used for the processing. In the processing by the end portion processing apparatus, a processing tool (for example, a bite) is brought into contact with the end portion of the workpiece in a state where the vicinity of the end portion is held by the chuck and is rotated. Thereby, the edge part of a workpiece is cut.

  By the way, the oil well pipe is about 10 m long, and there is an oil well pipe called tubing having an outer diameter of 114 mm or less. Further, since the oil well pipe is connected using a threaded joint, a screw is formed at the end of the oil well pipe. In threading in such an oil well pipe manufacturing process, cutting is performed while rotating the pipe at a high speed. When the pipe is rotated at a high speed by screw machining, the oil well pipe having a long and small outer diameter has a slight bend in the longitudinal direction, so that vibration is generated. This vibration deteriorates the machining accuracy of the screw.

  Therefore, the portion of the workpiece behind the chuck is restrained in a state where it can be rotated by the support roller of the support device, thereby suppressing the occurrence of vibration. A plurality of such support devices are installed at predetermined intervals in the longitudinal direction of the workpiece.

  Various proposals have been made for such an end processing apparatus, and for example, Patent Document 1 is available. The edge processing apparatus proposed in Patent Document 1 includes four support rollers that are paired with two upper and lower support devices disposed on both sides of a workpiece, and two support rollers that are paired with the upper and lower two support rollers. And an air cylinder that individually moves toward and away from the workpiece. Thereby, while being able to support a to-be-processed material with suitable force, even when it rotates at high speed, it is supposed that it can track to a run-out of a to-be-processed material.

  By the way, while moving the workpiece in a posture in which the longitudinal direction is horizontal and moving in the direction perpendicular to the longitudinal direction (the X direction when the vertical direction is the Y direction and the longitudinal direction is the Z direction in the orthogonal coordinate system), The workpiece may be transferred by moving in the direction.

  Various proposals have heretofore been made regarding a transfer apparatus that performs such transfer, for example, Patent Document 2. In Patent Document 2, a lever turning type transfer device has been proposed, and the transfer device performs transfer by turning a lever in a state where a bar-shaped material to be conveyed is held by a recess. In the embodiment, the transfer device includes a driven lever for delivering a material to be conveyed, an interlocking shaft for synchronizing the driven lever, a hydraulic cylinder for causing the driven lever to pivot, and a linear operation of the hydraulic cylinder. It is comprised with the drive lever which converts into rotary motion. Two hydraulic cylinders are arranged in the longitudinal direction of the conveyed material. Patent Document 2 targeting such a transfer apparatus proposes adjusting the number of hydraulic cylinders to be driven based on the load (size, weight) of the rod-shaped material to be transferred.

WO2006 / 033314 JP 2011-144851 A

  As described above, the end processing apparatus is provided with a processing tool, a chuck, and one or more support devices in that order along the longitudinal direction of the workpiece. In such an end processing apparatus, it is necessary to transport the work material to a processing position in order to hold the work material by the chuck and hold the work material by the support device. However, in the above-mentioned Patent Document 1, no consideration is given to a method of conveying a workpiece to a machining position.

  As a method of transporting the workpiece to the processing position, for example, a method of lifting and transporting the workpiece with a crane can be considered. However, if the workpiece is conveyed using a crane, the workpiece is likely to be shaken. For this reason, there is a possibility that the processing accuracy is lowered and product defects occur.

  Further, as a method for conveying the workpiece to the machining position, for example, a method of conveying the workpiece in the longitudinal direction by a conveyance roller is conceivable. In this method, a transport roller is installed between the chuck and the support device or between adjacent support devices, and a transport roller is also installed behind the support device farthest from the chuck. Thus, the workpiece can be conveyed from the rear of the support device farthest from the chuck to the machining position, and the processed workpiece can be conveyed from the machining position to the rear of the support device farthest from the chuck. In this method, it is possible to suppress positional deviation due to shaking, but if the work material is long like an oil well pipe, the end processing apparatus becomes long and the installation space becomes a problem.

  As a method of transporting the workpiece to the processing position, for example, a method of combining a transport roller and a lever turning type transfer device as proposed in Patent Document 2 is considered. In this method, a transport roller is installed between the chuck and the support device or between adjacent support devices. In addition, a transfer device is installed to transfer the material before end processing sent from the previous process to the transport roller, and after processing the processed material on the transport roller, Install a transfer device to send to the process. In this method, the installation distance can be reduced by shortening the conveyance distance by the conveyance roller, but it is necessary to install a plurality of transfer devices, and the equipment cost becomes a problem.

  Also, after operating the hydraulic cylinder of one transfer device to transfer the work material from the transport roller and sending it to the subsequent process, the hydraulic cylinder of the other transfer device is operated and sent from the previous process. The transferred work material is transferred to the transport roller. For this reason, reduction of the time required for transfer and input energy is desired.

  Further, the lever turning type transfer device transfers the workpiece held by the lever by the turning operation of the lever. If the holding position of the workpiece is shifted during the turning operation, the workpiece may collide with the support roller, and the support roller may receive the driving force from the hydraulic cylinder via the workpiece. In this case, it is necessary to confirm whether or not the support roller is damaged due to the collision. If damage is confirmed, further maintenance is required. As a measure for preventing the collision between the workpiece and the support roller, it is conceivable to largely retract the support roller during transfer. However, it is necessary to lengthen the movable range of the support roller, which increases the size of the end processing device and increases the equipment cost.

  The present invention has been made in view of such circumstances, and with a simple apparatus configuration, it is possible to suppress misalignment when conveying a workpiece to a machining position, and to reduce installation space and equipment cost. An object of the present invention is to provide an end processing apparatus.

  The gist of the present invention is as follows.

(1) A chuck that rotates a workpiece whose outer surface is a cylindrical surface in a posture where the longitudinal direction is horizontal, and an end portion of the workpiece that is held and rotated by the chuck. An end processing apparatus comprising: a movable processing tool to be supported; and a support device for rotatably holding the outer surface of the workpiece by support rollers on both sides, and is long from the end of the workpiece to be processed In the direction, the processing tool, the chuck, and one or more support devices are installed in that order, and the end processing device further moves the workpiece in the longitudinal direction and conveys the workpiece to a processing position. Therefore, the conveyance rollers installed at two or more places between the chuck and the support device and between the support devices adjacent to each other, and the workpiece at the entry side position in a direction perpendicular to the longitudinal direction thereof Move And a transfer device that moves the workpiece on the transport roller in a direction perpendicular to its longitudinal direction and moves it to the delivery side position while moving it down to the transport roller. The transport roller has a recess for receiving the outer surface of the workpiece, and the transfer device guides the kicker by rotating the workpiece disposed on the upper side, and the kicker in the vertical direction. A first guide surface that is lowered as it approaches the exit position, and a second guide surface that is lowered as it moves away from the entry position. When the guide surface is observed from above, it extends at least from the axial center of the workpiece at the entry side position to at least the side end of the recess closer to the entry side position, and the second guide surface is from above. When extending from at least the axis of the workpiece on the transport roller to at least the axis of the workpiece at the exit position, and between the first guide surface and the second guide surface, An end machining apparatus, wherein a step is provided to stop the workpiece that is rotated and guided by one guide surface.

(2) The edge part processing apparatus as described in said (1) is further provided with the height adjustment mechanism which adjusts the up-down direction position of the said conveyance roller.

(3) The support roller is composed of four support rollers that are paired on the upper and lower sides disposed on both sides of the workpiece, and the support device further includes a pair of support that is paired on the upper and lower sides. The end portion processing apparatus according to (1) or (2), further comprising an air cylinder that individually moves the roller as a unit with respect to the workpiece.

(4) The end machining apparatus according to (3), wherein the four support rollers are all arranged on the same plane in the axial direction of the workpiece with the same outer diameter.

  Since the edge part processing apparatus of this invention conveys a to-be-processed material to a process position with a conveyance roller, the position shift by a shake can be suppressed and processing precision can be ensured. Moreover, since a conveyance roller and a transfer apparatus are combined, it can reduce that an edge part processing apparatus becomes long and enlarges, and securing of an installation space becomes easy.

  Since the transfer device includes the kicker having the first guide surface and the second guide surface, the transfer device can perform transfer from the entry position to the relay position and transfer from the relay position to the exit position. For this reason, the edge part processing apparatus of this invention does not need to install multiple transfer apparatuses, can reduce installation cost and can reduce installation space. In addition, the time required for transfer and the input energy can be reduced.

It is a top view which shows typically the structural example of the edge part processing apparatus of this invention. It is a schematic diagram which shows the transfer apparatus with which the structural example of the edge part processing apparatus of this invention is provided, The figure (a) is a front view, The figure (b) is a top view. It is a front view which shows the transfer procedure in the transfer apparatus with which the structural example of the edge part processing apparatus of this invention is equipped, The same figure (a) is the beginning of conveyance of the workpiece of a relay position, The same figure (b) is input. (C) shows when the workpiece reaches the exit position, and (d) shows when the workpiece comes into contact with the recess at the relay position. Show. It is a front view which shows the support apparatus with which the structural example of the edge part processing apparatus of this invention is provided. It is a front view which shows typically arrangement | positioning angle (theta) of a support roller.

  Below, the edge part processing apparatus of this invention is demonstrated, referring drawings.

  FIG. 1 is a top view schematically showing a configuration example of an end machining apparatus of the present invention. In the drawing, the end processing apparatus 10 is shown, and in order to facilitate understanding of the configuration, a processing position (a workpiece to be processed at the processing position) 71 and a position (relay position) that can be transferred by the transfer apparatus The imaginary line indicates the end 72 of the workpiece at). An end processing apparatus 10 shown in the figure includes a processing tool 11, a chuck 12, and a support apparatus 20.

  The processing tool 11 is held by a tool post (not shown), and the tool post can be moved in the longitudinal direction (Z-axis direction in the drawing) of the workpiece by an axial feed mechanism (not shown). Further, the tool post can be moved in a direction (X-axis direction in the figure) perpendicular to the longitudinal direction of the workpiece by a radial feed mechanism (not shown). The machining tool 11 moves with such movement of the tool post. The chuck 12 is rotated around its axis while holding the outer surface of the workpiece in a posture in which the longitudinal direction is horizontal.

  The support device 20 includes a base 21, a holder 23 that can move in the X-axis direction on the base 21, an air cylinder 22 that drives the movement of the holder 23, and a support that is rotatably supported by the holder 23. And a roller 24. Among them, the air cylinder 22, the holder 23, and the support roller 24 are provided on both sides of the workpiece.

  At the end processing, the air cylinder 22 is operated to move the support rollers 24 on both sides together with the holder 23 in the approaching direction. As a result, the support roller 24 is brought into contact with the outer surface of the workpiece, and the outer surface of the workpiece is clamped rotatably by the support rollers 24 on both sides. On the other hand, when conveying the workpiece before or after the end portion processing, the air cylinder 22 is operated to move the support rollers 24 on both sides together with the holder 23 in the direction of separating. Thereby, as shown in the figure, the support rollers 24 on both sides are retracted.

  The machining tool 11, the chuck 12, and the support device 20 are installed in the order of the machining tool 11, the chuck 12, and the support device 20 along the longitudinal direction from the end of the workpiece to be processed. Further, a plurality of support devices 20 are installed at intervals, and four support devices 20 are installed in the figure. In addition, in the case of end part processing of an oil well pipe, 1 to 20 support devices 20 are usually installed.

  The end processing apparatus 10 shown in the figure further includes a transport roller 50 and a transfer device 30. The conveyance roller 50 rotates in accordance with the operation of a driving device (not shown), thereby moving the transferred workpiece in the longitudinal direction thereof and conveying it to the machining position 71. Such a conveyance roller can be installed between the chuck 12 and the support device 20 and between the adjacent support devices 20. The conveyance rollers 50 need to be installed in at least two places. In the figure, one conveyance roller 50 is installed in each of five places. The conveyance roller 50 has the recessed part 50a which receives the outer surface of a workpiece, respectively.

  When the work material is held and rotated by the chuck and is processed while being held by the support device, if the conveying roller 50 is in contact with the work material, the work material may be wrinkled. is there. For this reason, the conveyance roller 50 can be moved in the vertical direction by a roller lifting device (for example, a hydraulic cylinder). Thereby, a conveyance roller can be evacuated below at the time of a process.

  The transfer device 30 transfers the workpiece before end processing to the transport roller 50 from a first skid (not shown). In addition, the end-worked workpiece is transferred from the transport roller 50 to a second skid (not shown). The transfer device 30 will be described with reference to FIG.

  2A and 2B are schematic views showing a transfer device provided in the configuration example of the end machining apparatus of the present invention, where FIG. 2A is a front view and FIG. 2B is a top view. In the figure, a transfer device 30, a transport roller 50, a first skid 61, and a second skid 62 are shown. In order to facilitate the understanding of the configuration of the transfer device 30, the support roller 24 of the support device, the entry side position (the workpiece at the entry side position) 41, and the relay are shown in FIG. A position (workpiece in a transferable state on the transport roller) 42 and an exit side position (workpiece at the exit position) 43 are shown. Further, in FIG. 5B, a work piece axis 41a at the entry position, a work piece axis 42a at the relay position, and a work center axis 43a at the exit position are shown by a one-dot chain line. And a side end 50b closer to the entry side position of the recess 50a of the transport roller.

  The first skid 61 receives the workpiece before end processing from the carry-in conveyor (not shown) and moves it to the entry side position 41. Moreover, the 2nd skid 62 receives the workpiece by which edge part processing was carried out in the delivery side position 43, and delivers it to a carrying-out conveyor (not shown). The transfer device 30 moves the workpiece at the entry side position 41 while moving it in a direction perpendicular to the longitudinal direction, and transfers the workpiece onto the transport roller 50. In addition, the transfer device 30 moves the workpiece on the transport roller 50 while moving it in a direction perpendicular to the longitudinal direction, and transfers it to the delivery position 43.

  The transfer device 30 includes a kicker 31 that guides the workpiece disposed on the upper side by rotating it, and a lifting device 32 (for example, a hydraulic cylinder or an air cylinder) that moves the kicker 31 in the vertical direction. To do. A plurality of transfer devices 30 having such a kicker 31 and a lifting device 32 are arranged along the longitudinal direction of the workpiece. In this configuration example, as shown in FIG. Has been placed.

  The kicker 31 has a first guide surface 31a and a second guide surface 31b as shown in FIG. The first guide surface 31 a becomes lower as it approaches the exit side position 43, and the second guide surface 31 b becomes lower as it moves away from the entry side position 41. The first guide surface 31a and the second guide surface 31b of the kicker shown in FIG.

  The first guide surface 31a, when viewed from above (as shown in FIG. 5B), is at least closer to the entry side position of the recess 50a from the axis 41a of the workpiece at the entry position. Extends to the side edge 50b. As described above, when the first guide surface 31a extends at least from the axis 41a of the workpiece at the entry position, the workpiece at the entry position 41 can be rotated by the first guide surface 31a. Further, when the first guide surface 31a extends to at least the side end 50b closer to the entry side position of the recess 50a, the workpiece is rotated by the first guide surface 31a, whereby the axis of the workpiece is rotated. It can be located above the recess 50a. If the kicker 31 is moved downward in this state, the workpiece reaches the relay position 42 by being guided by the recess 50 a and is transferred onto the transport roller 50.

  On the other hand, when the second guide surface 31b is observed from above (as shown in FIG. 5B), the second guide surface 31b is at least at the exit position from the axis 42a of the workpiece at the relay position (on the transport roller 50). It extends to the axis 43a of the workpiece. In this way, when the second guide surface 31b extends from at least the axis 42a of the workpiece at the relay position (on the conveyance roller 50), the workpiece at the relay position can be rotated by the second guide surface 31b. Further, when the second guide surface 31b extends at least to the shaft center 43a of the workpiece at the exit side position, the workpiece can be rotated by the second guide surface 31b to reach the exit side position 43.

  A step 31c is provided between the first guide surface 31a and the second guide surface 31b in order to stop the workpiece that rotates while being guided by the first guide surface 31a. Thereby, the workpiece rotated by the first guide surface 31a stops in a state where the axis is located above the recess 50a.

  The transfer device provided in the edge processing apparatus of the present invention is configured to move the kicker 31 having the first guide surface 31a and the second guide surface 31b described above in the vertical direction by the lifting device 32, thereby inserting the workpiece. While being transferred from the side position 41 to the relay position 42 on the transport roller, it is transferred from the relay position 42 on the transport roller to the exit position 43. Further, the workpiece is transported from the relay position 42 to the processing position by the transport roller 50 to process the end, and the processed workpiece is transported to a position where it can be transferred by the transfer device (relay position 42). To do. These procedures will be described with reference to FIG.

  FIG. 3 is a front view showing a transfer procedure in the transfer device provided in the configuration example of the edge processing device of the present invention. FIG. b) at the start of conveyance of the workpiece at the entry side position, (c) at the time when the workpiece reaches the exit position, and (d) at the drawing, the workpiece contacts the recess at the relay position. Each time. The figure shows a transfer position 42 in which the first work piece 73 before end portion processing arranged at the entry side position 41 is transferred by the transfer device provided in the configuration example of the end portion processing apparatus of the present invention shown in FIG. A procedure for transferring the second processed material 74 that has been end-finished and disposed at the relay position 42 to the delivery-side position 43 is shown.

  In transferring the workpiece, the kicker 31 is raised by the operation of the lifting device 32. As a result, as shown in FIG. 6A, the second guide surface 31b of the kicker is brought into contact with the second workpiece 74 placed on the transport roller 50 at the relay position 42.

  When the kicker 31 in a state where the second workpiece 74 at the relay position 42 and the second guide surface 31b are in contact with each other is further raised, the second workpiece 74 is rotationally moved by the guidance of the second guide surface 31b. But rises. Further, the first guide surface 31a of the kicker comes into contact with the first workpiece 73 at the entry side position as shown in FIG.

  When the kicker 31 is further raised, the second workpiece 74 rises while being rotationally moved by the guidance of the second guide surface 31b, and reaches the exit side position 43 as shown in FIG. Further, the first workpiece 73 is rotationally moved by the guidance of the first guide surface 31a.

  Thus, the kicker 31 in a state where the first workpiece 73 is guided by the first guide surface 31a is lowered. Here, after the first workpiece 73 is rotationally moved by the guidance of the first guide surface 31a, the first workpiece 73 is stopped by a step 31c provided between the first guide surface 31a and the second guide surface 31b. For this reason, the axial center of the 1st workpiece 73 will be located above the crevice 50a. For this reason, when the first workpiece 73 descends as the kicker 31 descends, the first workpiece 73 comes into contact with the recess 50 a of the transport roller 50 as shown in FIG.

  When the kicker 31 is further lowered, the first workpiece 73 is guided by the recess 50 a to reach the relay position 42 and is transferred onto the transport roller 50.

  The first workpiece transferred onto the transport roller 50 is transported to the processing position by the transport roller 50. In the processing position, the first workpiece is held by the chuck and is held by the support roller 24 of the support device. Thereafter, the transport roller 50 is lowered and retracted by the roller lifting device. In this state, the first workpiece is rotated by the chuck, and the end of the first workpiece is machined by the machining tool.

  After the end processing is completed, the conveying roller 50 is raised by the roller lifting device and brought into contact with the workpiece. In this state, the holding (restraining) by the chuck is released and the support roller 24 of the support device is retracted. Such a first workpiece is conveyed to a position (relay position) 42 that can be transferred by the transfer device by the transfer roller 50.

  On the other hand, the second workpiece 74 transferred to the delivery position is transferred to the carry-out conveyor (not shown) via the second skid 62 and sent to the next process. In addition, a new workpiece before end processing is carried into the entry side position 41 by a carry-in conveyor (not shown), and reaches the entry side position via the first skid 61. As a result, a state similar to that at the start of conveyance is obtained.

  Since the end processing apparatus of the present invention that operates in this way transports the workpiece to the processing position by the transport roller 50, it is possible to suppress positional deviation due to shaking and to ensure processing accuracy. Further, a transport roller 50 installed between the chuck and the support device or between adjacent support devices and a transfer device 30 for transferring a workpiece to the transport roller 50 are combined. For this reason, since it is not necessary to convey the workpiece to the rear of the support device farthest from the chuck, it is possible to reduce the length and size of the end processing device. For this reason, it is easy to secure the installation space.

  Further, since the transfer device 30 uses the rotational movement of the workpiece by the first guide surface 31a and the second guide surface 31b of the kicker, the workpiece is transferred only by moving the kicker 31 in the vertical direction. Can be realized. For this reason, an apparatus structure can be simplified and equipment cost can be reduced.

  Moreover, both the transfer from the entry side position 41 to the relay position 42 and the transfer from the relay position 42 to the exit side position 43 can be realized only by raising and lowering the kicker 31. For this reason, it is not necessary to install a plurality of transfer devices, the equipment cost can be reduced, and the installation space can be reduced. In addition, the time required for transfer and the input energy can be reduced.

  In the edge processing apparatus of the present invention, the workpiece may come into contact with the support roller 24 when the workpiece is transferred using the kicker 31. Here, the kicker 31 is placed on the first guide surface 31a and the second guide surface 31b in a rotatable state without holding the workpiece. For this reason, even if a work material contacts the support roller 24, the work material rotates and moves so that the support roller 24 is not damaged. For this reason, the operation | work and maintenance which confirm the presence or absence of damage of a support roller become unnecessary, and the deterioration of the manufacturing efficiency by them can be suppressed.

  Further, the retracted position may be set such that the interval between the support rollers arranged on both sides of the workpiece is slightly wider than the outer diameter of the workpiece, and the movable range of the support roller can be shortened. For this reason, it is possible to avoid the problem that the end processing apparatus is enlarged and the equipment cost is increased.

  In the end processing device of the present invention, it is preferable that the end processing device further includes a height adjusting mechanism for adjusting the vertical position of the transport roller. By adjusting the vertical position of the transport roller using the height adjusting mechanism, it is possible to further suppress the positional deviation and improve the processing accuracy. Moreover, it can respond also about the workpiece from which an outer diameter differs. As the height adjustment mechanism, for example, a pantograph type elevator, a jack, or a lever mechanism can be adopted.

  The concave portion of the transport roller has a first tapered surface whose outer diameter increases as it approaches the side end closer to the entry side position 41 and an outer diameter that increases as it approaches the side end closer to the exit side position 43. It is preferable that a 2nd taper surface is included. Thereby, compared with the case where the cross-sectional shape of a recessed part is a curve, such as a circular arc and an elliptical arc, the guide precision by a recessed part improves and it can further suppress the position shift of a workpiece.

  The first guide surface 31a of the kicker is not limited to the inclined surface as shown in FIG. A curved surface may be used as long as the workpiece placed on the upper side can be rotated and moved as it approaches the delivery side position 43. Further, the second guide surface 31b is not limited to the inclined surface as shown in FIG. A curved surface may be used as long as the workpiece can be rotated and moved as it moves away from the entry side position 41.

  In order to prevent the kicker 31 from wrinkling the workpiece to be rotated and moved, it is preferable that at least the surface layer portion of the end machining apparatus of the present invention that is in contact with the workpiece is made of engineering plastic. For example, MC nylon (registered trademark) can be used as the engineering plastic.

  In the end machining apparatus of the present invention, since the second guide surface extends at least to the axial center of the workpiece at the exit position, the workpiece falls between the kicker and the exit position (second skid). Can be prevented. However, there is a possibility that the workpiece is rotated by being guided by the second guide surface, and falls beyond the side edge of the second guide surface far from the entry side position below the exit side position (second skid). is there.

  In order to prevent this, as shown in FIG. 2, it is preferable that the support roller 24 regulates the range in which the workpiece is guided by the second guide surface and rotates. Accordingly, it is possible to prevent the workpiece to be rotated and moved by being guided by the second guide surface from falling while falling with the rise of the kicker 31 or rolling down to the lower side of the second conveyor. Specifically, the regulation of the workpiece by the support roller 24 can be realized by appropriately adjusting the retracted position of the support roller 24.

  In the present configuration example, four transfer devices 30 are arranged as shown in FIG. 1, but the number of transfer devices 30 may be set as appropriate according to the mass and length of the workpiece. Moreover, when installing the 3 or more transfer apparatuses 30, the embodiment which changes the transfer apparatus 30 operated according to the mass and length of a workpiece can be employ | adopted.

  Further, in this configuration example, as shown in FIG. 2, the kicker 31 is moved in the vertical direction by the lifting device 32. As the lifting device, for example, a hydraulic cylinder or an air cylinder can be used, and the number thereof may be appropriately set according to the mass of the workpiece and the thrust of the cylinder. Specifically, in the configuration example shown in FIG. 2, the center of the kicker 31 is supported by one lifting device. For example, by placing lifting devices at both ends of the kicker, two lifting devices can be used. 31 may be supported.

  Subsequently, a preferred embodiment of the chuck and the support device in the end portion processing apparatus of the present invention will be described.

  FIG. 4 is a front view showing a support device provided in the configuration example of the edge processing apparatus of the present invention. In the figure, the support device 20 is shown, and the position of the workpiece during clamping is indicated by an imaginary line in order to facilitate understanding of the configuration.

  As shown in the figure, the support device 20 has two support rollers 24 arranged one above the other. The holder 23 holds the above-described two upper and lower support rollers 24 and can move in a direction perpendicular to the longitudinal direction of the workpiece by the operation of the air cylinder 22. For this reason, the upper and lower two support rollers 24 can move integrally so as to approach the workpiece 71 and move away from the workpiece 71. The support roller 24, the holder 23, and the air cylinder 22 are disposed on both sides of the workpiece 71.

  As described above, the support device 20 does not move the four support rollers 24 arranged on the both sides of the workpiece in pairs, by the air cylinder 22, but by the hydraulic cylinder or the screw. It is preferable to move them apart. Thereby, even when the processing speed is increased and the productivity is improved, the support roller 24 can follow the bending, ellipse, and flatness of the workpiece with a quick response. Therefore, it is possible to effectively suppress the vibration caused by the bending, ellipse, and flatness of the workpiece 71 from being propagated to the end of the workpiece.

  Moreover, it is preferable that the four support rollers 24 are all arranged on the same plane in the axial direction of the workpiece with the same outer diameter. As a result, the force applied from the support roller 24 to the workpiece is the same for the four support rollers 24 that form a pair of the upper and lower two. For this reason, even when processing workpieces having different outer diameters, it is not necessary to adjust the positional relationship of the support rollers 24.

  The support device 20 sets the ratio (d / g) between the outer diameter d (mm) of the support roller 24 and the center distance g (mm) between the two upper and lower support rollers 24 to 0.5 to 0.98. Is preferred. This is because if the ratio (d / g) is less than 0.5, the force is not transmitted to the workpiece 71 and the clamping becomes insufficient. Further, when the support rollers 24 are arranged on the same plane, the ratio (d / g) is less than 1, but is preferably 0.98 or less in consideration of the clearance between the upper and lower two support rollers.

  When the range in which the workpiece is guided by the second guide surface and rotationally moves is regulated by the support roller, the workpiece passes between the two upper and lower support rollers and exceeds the side edge of the second guide surface. There is a risk of falling. In consideration of preventing this, the ratio (d / g) is more preferably as large as possible within the range of 0.5 to 0.98.

  At the time of end processing (clamping), the arrangement angle θ of the support roller 24 is preferably 22 to 45 °.

  FIG. 5 is a front view schematically showing the arrangement angle θ of the support rollers. In the same figure, the support roller 24 of the support device and the workpiece 71 during the edge processing are shown. The arrangement angle θ of the support roller 24 is an angle formed by a horizontal plane and a plane including the axis of the support roller 24 and the axis of the workpiece 71. When the arrangement angle θ of the support roller is less than 22 °, the difference between the horizontal component and the vertical component of the force applied by the support roller 24 becomes large, and the outer surface of the workpiece 71 is elliptical. There is a risk of deformation. On the other hand, if the support roller arrangement angle θ exceeds 45 °, the clearance between the support rollers 24 arranged on both sides of the workpiece may not be ensured depending on the outer diameter of the support roller 24.

  The force applied to the support roller 24 by the air cylinder 22 is preferably 1500 to 14000 N, more preferably 4000 to 6000 N, in total for the air cylinders on both sides. This is because if the force applied by the air cylinder 22 is too weak, the workpiece 71 is not sufficiently sandwiched, whereas if it is too strong, the workpiece 71 becomes resistant to rotation and the cutting speed is reduced.

  The distance between the support roller 24 and the chuck 12 of the support device arranged closest to the chuck 12 is z1 (see FIG. 1), and the distance between the support rollers 24 of the adjacent support devices 20 is z2 in order from the chuck side. z3,... zn (see FIG. 1), and the length of the workpiece is l, the relationship between zk (k = 1, 2, 3...) and l is {(zk / l) × 100}. Is preferably set to be 4% or more and 20% or less. This is because if the distance zk is too short, interference between the chuck 12 and the support roller and the support rollers occurs, while if the distance zk is too long, vibration occurs. The interval zk is not limited to a constant case, zk may be shortened on the chuck side, and zk may be lengthened as the distance from the chuck 12 increases.

  The material forming the support roller 24 is not particularly limited, but the support roller is formed of an elastic body such as rubber in order to prevent wrinkles on the outer surface of the workpiece during transfer or edge processing. It is preferable to do this. As the elastic body, for example, natural rubber or synthetic rubber can be employed. When the support roller 24 is formed of an elastic body, it is preferable to use an elastic body having a hardness HS of 60 to 100, and more preferably an elastic body having a hardness HS of 80 to 90. If the hardness HS is less than 60, the support roller itself may bend and the support of the workpiece may be insufficient. On the other hand, when the hardness HS exceeds 100, the vibration of the workpiece cannot be absorbed, and the vibration may be promoted.

  The end part processing apparatus of the present invention can suppress misalignment when a workpiece is conveyed to a processing position, and can reduce installation space and equipment cost. In addition, the time required for transfer and the input energy can be reduced. If such an end processing device of the present invention is applied to threading in the manufacturing process of an oil well pipe, it can greatly contribute to improving the quality of the well pipe and improving the manufacturing efficiency.

10: End processing device, 11: Processing tool, 12: Chuck, 20: Support device, 21: Base, 22: Air cylinder, 23: Holder,
24: Support roller, 30: Transfer device, 31: Kicker,
31a: 1st guide surface, 31b: 2nd guide surface, 31c: Level difference, 32: Lifting device,
41: entry side position, 41a: axis of workpiece at entry side position, 42: relay position,
42a: axis of the workpiece at the relay position 43: exit position,
43a: the axis of the workpiece at the exit position, 50: the transport roller, 50a: the recess,
50b: the side end closer to the entry side position of the recess, 61: first skid,
62: Second skid, 71: Workpiece at the processing position,
72: The end of the workpiece at a position that can be transferred by the transfer device, 73: the first workpiece,
74: Second workpiece

Claims (4)

A chuck that rotates a workpiece whose outer surface is a cylindrical surface with its longitudinal direction held in a horizontal posture, and a movable that processes the end of the workpiece that is held and rotated by the chuck. An end processing device comprising: a processing tool; and a support device for rotatably holding the outer surface of the workpiece by support rollers on both sides,
In the longitudinal direction from the end of the workpiece to be processed, the processing tool, the chuck, and one or more support devices are installed in that order,
The end processing device further moves the workpiece in the longitudinal direction thereof and transports it to a processing position between the chuck and the support device and between two adjacent support devices. The transport roller installed above and the workpiece at the entry side position are moved down in a direction perpendicular to the longitudinal direction of the workpiece and transferred to the transport roller, and the workpiece on the transport roller And a transfer device that moves it in a direction perpendicular to its longitudinal direction and transfers it to the exit position,
The transport roller has a recess for receiving the outer surface of the workpiece;
The transfer device comprises a kicker for guiding the workpiece disposed on the upper side by rotating and moving, and an elevating device for moving the kicker in the vertical direction,
The kicker has a first guide surface that decreases as it approaches the exit position, and a second guide surface that decreases as it moves away from the entry position;
When the first guide surface is observed from above, it extends from at least the axis of the workpiece at the entry position to the side end of the recess that is closer to the entry position,
When the second guide surface is observed from above, it extends from at least the axis of the workpiece on the transport roller to at least the axis of the workpiece at the exit position,
End machining, wherein a step is provided between the first guide surface and the second guide surface to stop the workpiece guided by the first guide surface and rotating. apparatus.   The end processing apparatus according to claim 1, further comprising a height adjusting mechanism that adjusts a vertical position of the transport roller.   The support roller is composed of four support rollers that are paired on the upper and lower two sides arranged on both sides of the workpiece, and the support device further includes a pair of support rollers that are paired on the upper and lower sides. The end part processing apparatus according to claim 1, further comprising an air cylinder that is individually moved toward and away from the workpiece. The end processing apparatus according to claim 3, wherein all of the four support rollers have the same outer diameter and are arranged on the same plane in the axial direction of the workpiece.

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