JP3750105B2 - Steel pipe end processing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a steel pipe end processing apparatus, and more particularly to a processing apparatus that rotates a rotating disk and performs a chamfering or flattening process on a steel pipe end with a tool tip mounted on the rotating disk. It is.
[0002]
[Prior art]
A processing device that performs chamfer chamfering on the outer end and inner end of a steel pipe and flattenes the shaft end surface of the steel pipe is disposed on a main shaft that is rotatably supported by the main body of the device and rotates integrally. A rotating disk is provided, and three saddles are arranged on the front surface of the rotating disk so as to be movable and adjustable in the radial direction. Each saddle is positioned and fixed at an appropriate position displaced in the radial direction from the rotation center of the rotating disk, and a turret equipped with a tool equipped with a tip corresponding to the processing position or processing shape of the steel pipe is attached to the saddle. Installed. Then, while positioning the end face of the steel pipe so as to face the front surface of the rotating disk and rotating the rotating disk in a required direction with the tool post positioned through each saddle in accordance with the processing position of the steel pipe, The tip of the tool post that turns with the rotation of the turntable is configured to chamfer chamfering on the outer end and inner end of the steel pipe, and to planarize the shaft end surface.
[0003]
[Problems to be solved by the invention]
In the above processing apparatus, when the material or processing shape of the steel pipe to be processed is changed by changing the order, a new turret with a chip corresponding to that and an old turret corresponding to the old order mounted on the saddle Need to be replaced. Conventionally, the tool post is bolted to the saddle, and the operator manually removes the bolt and removes the old tool post from the saddle using an overhead crane, and then uses the overhead crane to the saddle with the new tool post. after the rice much-decided and are fixed again bolt. In other words, since the turret replacement work relies on the operator's manual work, the loss time is large, and it takes about 30 minutes to replace one turret, which reduces the production efficiency. Was the cause.
[0004]
OBJECT OF THE INVENTION
In view of the above-mentioned problems inherent in the above-described conventional technology, the present invention has been proposed to suitably solve this problem, and a steel pipe end that can save labor by automating the exchange of a tool post. An object of the present invention is to provide a processing apparatus.
[0005]
[Means for Solving the Problems]
In order to overcome the above-described problems and achieve the intended purpose, a steel pipe end processing apparatus according to the present invention includes:
A plurality of saddles are movably arranged in the radial direction on the front surface of a turntable rotatably arranged on the apparatus main body, and can be inserted into a tool mounting portion that is formed in each saddle and opens forward. The tool post, which is provided with a section and is detachably mounted on the saddle, is equipped with a cutting tool having a tip for chamfering or flattening the end of the steel pipe, and is turned by the rotation of the rotating disk. In a processing device that performs Kaisaki chamfering and flattening on the end of a steel pipe with each tip
An adjusting device for moving and adjusting the saddle in the radial direction with respect to the rotating disk;
A holding means that is disposed on the saddle and always holds the tool post fixed to the saddle and is capable of releasing the holding;
Release that can release the fixed holding of the tool post by the holding means in a state in which the saddle disposed in the apparatus main body and moved to the release position by the adjusting device is positioned at the tool change position by the rotation of the rotating disk. Means,
A tool magazine in which a plurality of tool rests are detachably mounted, and an automatic tool changer having an exchanging means for exchanging the tool rest of the magazine and the tool rest of the saddle at a tool change position.
The holding means is capable of moving back and forth in a direction perpendicular to the axial center line of the tool mounting portion of the saddle, and has a tip formed in a recess formed on the peripheral surface of the arbor portion of the tool rest that is fitted into the tool mounting portion. An engaging member whose portion can be engaged and disengaged, an urging means for urging the engaging member to always engage with the recess, and the engaging member moving away from the recess against the urging force of the urging means And a release mechanism that can be moved. The release member is operated by the release means to move the engagement member away from the recess .
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, a preferred embodiment of the steel pipe end processing apparatus according to the present invention will be described below with reference to the accompanying drawings.
[0007]
FIG. 1 is a schematic configuration diagram illustrating an entire processing apparatus according to an embodiment. The processing apparatus 10 includes a chamfering apparatus 11 and an automatic tool changer 12 disposed on the side of the chamfering apparatus 11. Basically composed.
[0008]
(Automatic tool changer)
In the automatic tool changer 12, a tool magazine 15 is rotatably disposed on a support member 14 standing on a base 13, and a plurality of tool magazines 15 are arranged on the outer periphery of the tool magazine 15 at predetermined intervals in the circumferential direction. A tool holding portion 15a is formed, and various tool rests 16 are detachably attached to the tool holding portions 15a from the front side. The tool magazine 15 is configured to be indexed and rotated by an indexing motor (not shown) so that an arbitrary tool holding portion 15a can be indexed and positioned at the tool change position.
[0009]
A support base 17 is erected on a base 13 between the tool magazine 15 and the chamfering device 11, and a change arm 18 as an exchanging means is provided between the tool magazine 15 and the chamfering device 11 on the support base. It is arranged to be movable. The change arm 18 includes gripping portions 18 a and 18 a at both ends in the longitudinal direction thereof, and is positioned at a tool post 16 positioned at a tool change position of the tool magazine 15 or a tool change position described later of the chamfering device 11. The tool post 16 is configured to be gripped by the gripping portions 18a. In addition, the change arm 18 is configured to be movable in the front-rear direction and is configured to be rotatable by 180 °, and the tool post 16 gripped by each gripping portion 18a is attached to a tool holding portion 15a of the tool magazine 15 or a saddle 28 described later. The tool post 16 of each gripping part 18 a can be exchanged between the saddle 28 and the tool magazine 15 while being removed from the tool mounting part 28 a and attached to the front.
[0010]
(Chamfering device)
2 and 3, the chamfering device 11 has a pair of guide rails 20 and 20 arranged in parallel on the upper surface of the base 19 so that the device main body 21 can slide on the guide rails 20 and 20. It is mounted. On the base 19 facing the front of the apparatus main body 21, a work support device 23 that holds the steel pipe 22 with the end face of the steel pipe 22 facing the apparatus main body 21 is disposed. The apparatus main body 21 is configured to move toward and away from the steel pipe 22 held by the work support apparatus 23 by moving means 24 comprising a combination of a screw shaft and a nut that is rotated forward and backward by a servo motor, for example. It is.
[0011]
A main shaft (not shown) parallel to the guide rail 20 is rotatably supported inside the apparatus main body 21, and a circular turntable 25 is integrally formed at a shaft end protruding from the main body of the main shaft. It is arranged. A drive motor 27 is connected to the main shaft via a transmission system 26 composed of a gear, a belt, and the like. By driving the drive motor 27, the main shaft and the rotating plate 25 are configured to rotate integrally. The turntable 25 is configured to be rotated by a drive motor 27 so that each saddle 28 can be positioned at a tool change position by the automatic tool changer 12.
[0012]
As shown in FIG. 4, a plurality (three in the embodiment) of saddles 28 are arranged on the front surface of the rotating plate 25 so as to be movable in the radial direction. Each saddle 28 is adjusted by an adjusting device 31 described later. The position is adjusted according to the dimensions of the steel pipe 22 and the like. Further, each saddle 28 is provided with a tool post 16 that can be attached and detached by the automatic tool changer 12. Each tool post 16 includes an arbor portion 29 (see FIG. 6) that can be inserted into a tool mounting portion 28a formed on the saddle 28, and also performs chamfer chamfering on the outer end portion and the inner end portion of the steel pipe 22. Alternatively, a cutting tool 30 is provided on a shaft end surface of the steel pipe 22 on which a chip for performing a flat processing is detachably mounted. Note that the tool post 16 on which chips for chamfering chamfering are disposed on the outer end portion and the inner end portion of the steel pipe 22 includes a copying roller that abuts on the outer peripheral surface or the inner peripheral surface of the steel pipe 22. The tip is in contact with the outer end or the inner end of the steel pipe 22 at a required angle in a state where the tip is in contact with the outer peripheral surface or the inner peripheral surface of the steel pipe 22, and the portion can be suitably subjected to chamfering chamfering. ing. Further, a concave portion 29a is formed on the peripheral surface portion of the arbor portion 29 of the tool post 16 as an engaged portion to which an engaging member 44 of a holding device 43 described later is detachably engaged. An inclined surface 29b is formed on the inner surface on the rotating disk side (see FIG. 6).
[0013]
(Saddle adjustment device)
The adjusting device 31 that adjusts the movement of each saddle 28 with respect to the rotating plate 25 includes a drive mechanism 32 provided in the apparatus main body 21 and a moving mechanism provided on the rotating plate 25 corresponding to each saddle 28. Part 33. In addition, since the structure of each moving mechanism part 33 is the same, only the moving mechanism part 33 of the saddle 28 located on the left side in FIG. 4 will be described, and the same members of the moving mechanism parts 33, 33 of the other saddles 28, 28 will be described. Are denoted by the same reference numerals.
[0014]
The drive mechanism portion 32 includes an operating shaft 34 disposed coaxially and rotatably inside the main shaft, and the operating shaft 34 is an adjustment motor such as a servo motor disposed in the apparatus main body 21. 35 (see FIG. 2) is configured to be rotationally controlled in the forward and reverse directions. As shown in FIG. 5, a main bevel gear 36 is disposed at the front end of the operating shaft 34 so as to be integrally rotatable, and a bevel gear 38 disposed on a transmission shaft 37 constituting each moving mechanism portion 33 is disposed on the bevel gear 36. Each is designed to mesh.
[0015]
A pair of guide portions 39, 39 extending in the radial direction are provided in parallel on the front surface of the rotating disk 25, and the saddle 28 is slidably disposed between the guide portions 39, 39. An adjusting screw shaft 40 constituting the moving mechanism portion 33 is rotatably disposed between the guide portions 39, 39, and the screw shaft 40 is screwed into a nut 41 provided on the saddle 28. Has been. Further, between the guide portions 39, 39, the transmission shaft 37 is parallel to the adjustment screw shaft 40 and extends radially from the rotation center of the rotating disk 25, and is rotatably disposed. The shaft 37 is connected to the adjusting screw shaft 40 via a gear train 42. That is, when the operating shaft 34 is rotated in the forward / reverse direction by the adjusting motor 35, the adjusting screw shaft 40 is rotated in the forward / reverse direction via the transmission shaft 37, whereby the saddle is operated in cooperation with the nut 41. 28 is adapted to move and adjust in the radial direction of the rotary disk 25 along the guide portions 39 and 39.
[0016]
In the embodiment, the slave bevel gear 38 of each moving mechanism section 33 meshes with the main bevel gear 36 of the operating shaft 34 in common, and the movement of each saddle 28 can be adjusted by one adjustment motor 35. ing. However, the connection between the transmission shaft 37 and the adjustment screw shaft 40 in each moving mechanism section 33 is configured to be able to be released by appropriate means, and is configured so that only an arbitrary saddle 28 can be individually moved and adjusted. is there.
[0017]
(Tool post holding device)
Each saddle 28 is provided with a holding device 43 as a holding means for detachably holding the tool post 16. As shown in FIG. 6, the holding device 43 includes an engagement member 44 that can move forward and backward in a direction orthogonal to the axial center line of the tool mounting portion 28 a in the saddle 28, and the distal end portion 44 a of the engagement member 44 is It protrudes into the tool mounting portion and is configured to detachably engage with the recess 29a in the arbor portion 29 of the tool post 16 fitted into the tool mounting portion 28a. The engaging member 44 is urged in a direction in which the tip end portion 44a is always engaged with the recess 29a by a disc spring 45 as urging means. In addition, an inclined surface 44b corresponding to the inclined surface 29b formed in the concave portion 29a is formed at the distal end portion 44a, and an arbor with respect to the tool mounting portion 28a is caused by a wedge action in which both the inclined surfaces 29b and 44b abut. The portion 29 can be firmly fixed and held.
[0018]
The holding device 43 includes a release mechanism 46 that moves the engaging member 44 away from the recess 29 a against the urging force of the disc spring 45. The release mechanism 46 rotates with respect to the saddle 28 via a second pin 49 and a connecting plate 48 whose one end is rotatably connected to the rear end of the engaging member 44 via a first pin 47. The L-shaped actuating plate 50 is movably disposed, and one end of the actuating plate 50 and the other end of the connecting plate 48 are rotatable via the third pin 51. It is connected. Further, an operating pin 52 that can be moved toward and away from the other end of the operating plate 50 is slidably disposed at a portion of the saddle 28 on the turntable side. The distal end portion 44a of the engaging member 44 is moved to the arbor portion 29 by rotating the operating plate 50 in a predetermined direction (counterclockwise in FIG. 6) with the second pin 49 as a fulcrum. The turret 16 is moved away from the recess 29a, whereby the tool holder 16 is fixedly held to the saddle 28.
[0019]
At the release position set between the guide portions 39, 39 in the rotating disk 25, the drive pin 53 is disposed so as to be movable in the axial direction of the rotating disk 25 (the same direction as the moving direction of the operating pin 52). The drive pin 53 is always urged by the compression spring 54 in a direction away from the saddle 28 (backward). The drive pin 53 is set so as to be separated from the operation pin 52 and aligned in the axial direction in a state where the saddle 28 is moved and positioned by the adjusting device 31 to the release position.
[0020]
At the tool change position set on the arrangement side of the automatic tool changer 12 in the apparatus main body 21, a hydraulic cylinder 55 as a release means is arranged at a portion facing the back side of the rotary plate 25. The piston rod 55a is directed to the rotating disk 25. The piston rod 55a is set so as not to interfere with the rotation of the rotating disc 25 by being separated from the drive pin 53 at the standby position retracted into the barrel. Further, when each saddle 28 facing the release position by rotating the turntable 25 is positioned at the tool change position, the drive pin 53 and the piston rod 55a are aligned in the axial direction, and the piston rod 55a extends from the barrel. By energizing the hydraulic cylinder 55 so as to come out, the operating pin 52 is moved so as to come into contact with the other end of the operating plate 50 via the drive pin 53.
[0021]
The apparatus body 21 of the chamfering device 11 is provided with a positioning device (not shown) capable of positioning the rotating disk 25 so that the rotating disk 25 is positioned and held when the tool post 16 described later is replaced. Composed.
[0022]
[Effect of the embodiment]
Next, the operation of the processing apparatus according to the embodiment configured as described above will be described. When the turntable 25 in which each saddle 28 is positioned at a position corresponding to the dimension of the steel pipe 22 is rotated, the tip mounted on each tool post 16 is moved to the outer end, inner end or shaft of the steel pipe 22. A trajectory that follows the end face turns. When the apparatus main body 21 is moved close to the end of the steel pipe in this state, Kaisaki chamfering is performed on the outer end and the inner end of the steel pipe 22 by each of the turning tips, and the shaft end face is flattened. Is given.
[0023]
When exchanging the tool post 16 by changing the order, the adjustment device 31 is controlled to move, and the saddle 28 is moved along the guide portions 39, 39, thereby positioning it at the release position. Next, by rotating the turntable 25 and positioning the saddle 28 on which the tool post 16 to be replaced is mounted at the tool change position, as shown in FIG. 6, the piston rod 55a and the drive pin of the hydraulic cylinder 55 53 and the operating pin 52 are aligned in the axial direction. At this time, the rotating disk 25 is held by the positioning device provided in the apparatus main body 21 so as not to be rotationally displaced.
[0024]
Next, when the hydraulic cylinder 55 is urged in the direction in which the piston rod 55a extends from the barrel, the rod 55a abuts against the drive pin 53 and moves forward (saddle side). Thus, the drive pin 53 comes into contact with the operation pin 52, and the operation pin 52 moves toward the front (the other end portion of the operation plate 50). The operating pin 52 abuts against the other end of the operating plate 50 and presses it forward, so that the operating plate 50 rotates counterclockwise in FIG. 6 with the second pin 49 as a fulcrum, The engaging member 44 is moved through the connecting plate 48 so as to retract from the tool mounting portion 28a against the biasing force of the disc spring 45. That is, the distal end portion 44a of the engaging member 44 is separated from the concave portion 29a of the arbor portion 29 in the tool post 16 fitted into the tool mounting portion 28a, and the fixed holding of the tool post 16 to the saddle 28 is released.
[0025]
In the automatic tool changer 12, the new tool rest 16 corresponding to the new order is held by one holding part 18 a of the change arm 18, and the empty holding part 18 a of the arm 18 is attached to the chamfering apparatus 11. The change arm 18 moves toward the chamfering device 11 so as to approach each other. Thereby, the old tool post 16 corresponding to the old order whose fixed holding with respect to the saddle 28 is released is gripped by the empty gripping portion 18a. Then, the old tool post 16 is removed from the saddle 28 by moving the change arm 18 away from the rotating plate 25 forward.
[0026]
Next, after rotating the change arm 18 to move the gripping portion 18a holding the new tool post 16 to the front of the saddle 28, the change arm 18 is moved close to the rotating plate 25, The arbor part 29 of the new tool post 16 is inserted into the tool mounting part 28 a of the saddle 28. Further, by reversely energizing the hydraulic cylinder 55 and retracting the piston rod 55a into the barrel, the drive pin 53 moves away from the operating pin 52 by the elasticity of the compression spring 54. As a result, the operation plate 50 is allowed to rotate clockwise (in FIG. 6), and the engagement member 44 has the tip 44a protruding into the tool mounting portion by the biasing force of the disc spring 45. It moves and engages with the recess 29a of the arbor part 29. At this time, the new tool rest 16 is firmly fixed and held on the saddle 28 by a wedge action in which the inclined surface 44 b of the engaging member 44 and the inclined surface 29 b of the arbor portion 29 abut. After releasing the gripping portion 18 a of the change arm 18, the arm 18 is moved away from the rotating plate 25 and moved closer to the tool magazine 15, thereby completing the replacement of the old and new tool post 16, 16. To do.
[0027]
The old tool post 16 held by the gripping portion 18a of the change arm 18 is returned to the tool holding portion 15a in the tool magazine 15 that is indexed and positioned in advance at the tool change position by moving the arm 18 back and forth. It is.
[0028]
By performing the above-described replacement operation for each saddle, the new tool post 16 corresponding to the new order is attached to all the saddles 28. Each saddle 28 is moved and adjusted to a position corresponding to the machining position of the steel pipe 22 with respect to the rotating disk 25 by controlling the operation of the adjusting device 31.
[0029]
That is, in the embodiment, the hydraulic cylinder 55 (release means) for releasing the holding device 43 that fixes and holds the tool post 16 to the saddle 28 is provided in the device main body 21 that does not rotate. It is possible to automate the replacement work of the tool post 16 without any trouble. Therefore, manpower is not required for exchanging the tool post 16 and labor saving can be achieved.
[0030]
In the above-described embodiment, the case where each tip for processing the outer end portion, the inner end portion or the shaft end surface of the steel pipe is individually attached to the tool post has been described. For example, the outer end portion and the inner end portion of the steel pipe The present invention can be applied to a type in which two chips to be processed are mounted on one tool post. Further, the tool post for processing the outer end portion and the inner end portion of the steel pipe may be a fixed type that does not include a copying roller. In the embodiment, the operation plate of the release mechanism is configured to rotate through the operation pin. However, a configuration in which the operation plate is directly rotated by the drive pin or the piston rod of the hydraulic cylinder may be employed. The release means is not limited to a hydraulic cylinder, and may be a pneumatic cylinder or the like, or a mechanism that combines a motor and a cam rotated by the motor may be employed. Furthermore, the biasing means is not limited to a disc spring, and other elastic members such as a compression spring may be used.
[0031]
【The invention's effect】
As described above, according to the steel pipe end processing apparatus according to the present invention, the release device of the holding device that fixes and holds the tool post including the tip to the saddle is provided outside the rotating disk, thereby complicating the configuration. It is possible to automate the work of changing the tool post by the automatic tool changer without doing so. That is, the worker can be freed from heavy labor, and labor saving can be achieved. Moreover, since it is not necessary for the worker to work close to the mechanical device, safety can be ensured.
[Brief description of the drawings]
FIG. 1 is a schematic front view showing an entire processing apparatus according to an embodiment of the present invention.
FIG. 2 is a schematic side view showing a chamfering device of a processing apparatus according to an embodiment.
FIG. 3 is a schematic front view of a chamfering apparatus according to an embodiment.
FIG. 4 is a schematic front view showing the turntable of the chamfering apparatus according to the embodiment in a state where the tool post is removed from the saddle.
FIG. 5 is a schematic front view showing an adjustment device for a chamfering device according to an embodiment.
FIG. 6 is a cross-sectional view of an essential part showing a holding device for a chamfering apparatus according to an embodiment.
[Explanation of symbols]
12 Automatic tool changer 15 Tool magazine 16 Tool post 18 Change arm (change means)
21 Main body 22 Steel pipe 25 Turntable 28 Saddle
28a Tool mounting part
29 Arbor part 29a Concave part (engaged part)
29b Inclined surface 30 Bit 31 Adjusting device 43 Holding device (holding means)
44 engaging member
44a Tip
44b Inclined surface 45 Disc spring (biasing means)
46 Release mechanism 55 Hydraulic cylinder (release means)

Claims (2)

A plurality of saddles (28) are arranged to be movable in the radial direction on the front surface of a turntable (25) rotatably arranged on the apparatus body (21), and each saddle (28) has a front The end of the steel pipe is chamfered on the tool post (16) provided with an arbor part (29) that can be inserted into the tool mounting part (28a) that is open to the saddle (28). A cutting tool (30) equipped with a chip to be machined or a chip to be flattened is mounted, and Kaisaki chamfering and flattening are performed on the end of the steel pipe (22) with each chip swirled by the rotation of the rotating disk (25). In processing equipment,
An adjusting device (31) for moving and adjusting the saddle (28) in the radial direction with respect to the rotating disk (25);
A holding means (43) disposed on the saddle (28), which always holds the tool post (16) fixed to the saddle (28) and can be released;
The saddle (28) disposed on the apparatus body (21) and moved to the release position by the adjusting device (31) is positioned at the tool change position by the rotation of the rotating disk (25), and the holding Release means (55) capable of releasing the fixed holding of the tool post (16) by the means (43);
A tool magazine (15) in which a plurality of turrets (16) are detachably mounted, and the turret (16) of the magazine (15) and the turret (16) of the saddle (28) at the tool change position are replaced. and a automatic tool changer (12) having an exchange means (18) to
Said retaining means (43), said saddle (28) tool mounting part (28a) can be moved forward and backward perpendicular to the direction in which the axial center line of the, fitted interpolated the tool rest to the tool mounting portion (28a) ( 16) an engagement member (44) whose tip (44a) can be engaged with and disengaged from a recess (29a) formed on the peripheral surface of the arbor portion (29) , and the engagement member (44) is always recessed ( and biasing means (45) for biasing to engage in 29a), release may not moved away from the recess (29a) against the biasing force of the biasing means engaging member (44) (45) mechanism ( 46), and the engagement member (44) is moved away from the recess (29a) by operating the release mechanism (46 ) by the release means (55). Steel pipe end processing equipment. With recesses inclined surface to the inner surface of the rotating disk side of (29a) (29 b) is formed of the arbor portion (29), the inclined surface (44b) said engaging member and a corresponding inclined surface (29 b) (44 ) formed at the tip portion of (44a), when engaged distal portion (44a) in the recess (29a), both inclined surfaces (29 b, 44b) is in the tool mounting part (28a) by wedge action contacts processing apparatus of the steel pipe end according to claim 1, wherein the so that construction be firmly fixed holding arbor portion (29) for.

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