JP2005324272A - Threading device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a threading device for continuously carrying out burring and tapping. <P>SOLUTION: The threading device comprises a driving means 19 for vertically moving a movable body 10 by supporting a rotating cylinder body 16 having a driving gear A, rotatably to a screw column 4 fixed to a base; a transmission gear group 17 for transmitting the rotation of the driving gear A by the vertical motion of the movable body 10, to an output shaft 12 of a driving cartridge mounted in a replaceable manner; and a machining means 22 with a tapping shaft 40 mounted to the lower part of a holder 13 connected to the output shaft 12 and supported in a vertically movable and rotatable manner to project downward. Rotation generated by the vertical motion of the movable body 10 screwed with the screw column 4 is transmitted to the output shaft 12 provided at the driving cartridge 11 through the transmission gear group 17, and burring and tapping are continuously performed to a plate to be machined by the machining means 22 mounted to the output shaft through the holder 13. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a screw machining apparatus capable of continuously performing burring and tapping.

  In order to attach a work plate used for various products, a screw hole for screwing a bolt is formed. A press machine with a punch is pressed down to punch a small hole in the work plate. There are a burring process in which a flange portion is raised around the inner surface and a tapping process in which a thread is engraved on the inner wall of the flange portion. However, both processing methods are performed using different machine tools because the work processes are different from each other. That is, since there is no screw processing device that continuously processes with one device while mechanically controlling the feed amount of the shaft in burring processing and the rotation speed and feed speed of the tap shaft in tapping processing, Processing is performed separately using another processing device.

  Each machine tool that performs burring and tapping processing is installed at a location separated by the convenience of arrangement due to the difference in the size of the machine, etc. There is a drawback that it takes a long time to move the work plate. In addition, there is a problem in that work efficiency is extremely poor because a plurality of manpower is required when there is a restriction on a place where a machine for moving a hoist or a crane cannot be used during the movement.

As a machine tool for performing tapping processing, a processing device for controlling the rotation speed and feed speed of the tap shaft by a computer is known. However, a machine tool controlled by a computer is large because the device is complicated. In addition, this type of apparatus is inevitably expensive because it is complicated and precise, and this type of expensive machine cannot be purchased from the viewpoint of the cost of processing parts. Moreover, performing a small amount of screw processing using such an expensive machine is unsuitable as a screw processing machine that performs a small amount of production with a variety of products.
Japanese Patent Laid-Open No. 07-112322

  When performing burring and tapping on a work plate in one step mechanically using a single device, the tap shaft is matched to the processing pitch (lead), and the rotation speed and feed speed are adjusted to the tap shaft. Therefore, each time the tap shaft is replaced due to the difference in the diameter of the screw hole, it is necessary to adjust the rotational speed and feed speed and to perform the centering work. There was a problem that work efficiency was bad.

  The present invention continuously performs burring and tapping on a workpiece plate using a single machine tool, and when tapping with different pitches (leads), the tap shaft is replaced. It is an object of the present invention to be able to perform screw machining by attaching a drive magazine that rotates at a rotation speed in accordance with the rotation speed of the tap shaft in a replaceable manner.

  In order to solve the above-mentioned problems, the present invention allows a screw cylinder 4 having a lower end fixed to a base base 2 of a press machine 1 to rotatably support a rotating cylinder body 16 having a drive gear A so that the press machine A drive means 19 for moving up and down the movable body 10 attached to the lower part of the lift body 1a provided so as to be movable up and down, and rotation of the drive gear A due to the vertical movement of the movable body 10 is attached to the movable body in an exchangeable manner. A transmission gear group 17 provided in the movable body for transmitting to the output shaft 12 of the drive cartridge, and the output shaft 12 are detachably connected to the movable body 10 so that the movable body 10 can be moved up and down and rotated to project from below. The processing means 22 detachably attached to the lower part of the holder 13 is a tap shaft 40 continuously provided with a spiral cutting edge portion 43, an inclined spiral cutting edge portion 44, an enlarged diameter portion 46, and a punch portion 47, Screwed into the threaded column 4 Processing means for transmitting the rotation generated by the vertical movement of the movable body 10 having the drive gear A to the output shaft 12 provided in the drive cartridge 11 via the transmission gear group 17 and mounting the output shaft via the holder 13. The tapping shaft 22 is moved up and down while rotating, and a burring process and a tapping process are continuously performed on a work plate installed on a die provided on the base table.

  The transmission gear group 17 includes a gear C coaxially supported with a gear B meshed with the drive gear A and a gear E coaxially supported with the gear D meshed with the gear C on the same straight line. The gear G of a drive cartridge provided with a gear E that is detachably engaged with the gear E and a gear G having an output shaft is arranged on the straight line L, and is integrated with the drive cylinder 16. The drive gear A is connected to a gear G having an output shaft 12 of the drive cartridge. Further, the processing means 22 rotatably supports the holder 13 in a guide cylinder 25 accommodated in the space 10e of the movable body so as to be movable up and down, and an engaging convex portion 12a provided at the lower portion of the output shaft 12. And an engaging recess for fixing in the circumferential direction, a tap shaft 40 is detachably attached to the lower part of the holder, and a buffer means 20 comprising a spring or the like for absorbing an impact during burring, and a workpiece to be pressed against the die The holding means 32 is provided. Further, the buffer means 20 urges the flanges 25a of the guide cylinder formed in the space 10e of the movable body so as to be movable up and down downwards by a plurality of springs 26, and the guide cylinder 25, the holder 13, and the tap shaft. 40 is provided so as to be movable up and down. Further, the holding means 32 is inserted into a guide rod 35 pivotally supported at the lower part of the movable body so as to be able to move up and down through a holding plate 33 having an opening at the center, and a spring 26 for urging the holding plate downward. It is characterized by comprising.

  The present invention is economical because it can perform burring and tapping on a workpiece plate in one step continuously by a mechanical driving means, and can be machined with a single screw machining device. Since there is no need to move the plate, the centering operation for drilling can be performed only once, which can be simplified. Further, since manpower can be reduced, the workability can be further improved and the cost can be reduced. . Further, by attaching the drive magazine containing the gear group corresponding to the rotational speed of each tap shaft in an exchangeable manner, it is economical because screwing with different diameters can be performed with a single device. Further, the vertical movement of the rotating cylinder having the driving gear is used as the feed width of the tap shaft, and the rotational movement of the rotating cylinder is transmitted as a driving force to the tap shaft through the transmission gear group, so that appropriate barring is achieved. Processing and tapping can be performed continuously in one step, and the operation is simple and workability can be improved. By attaching the holder that attaches the tap shaft to the movable body so that it can move up and down, the tap shaft absorbs the impact when it abuts the work plate, and the center of the tap shaft shifts or the tap shaft breaks. Can be prevented and work safety can be improved.

  An embodiment of the present invention will be described. In FIG. 1, the screw machining apparatus of the present invention fixes, for example, a support table 3 on one side of the upper surface of a base table 2 provided at the lower part of a press machine 1, and the support table 3 A threaded column 4 made of a multi-threaded screw having a lower end fixed and established is provided. An attachment substrate 5 is attached to the lower part of the elevating body 1a which is positioned above the base table 2 and moves up and down by the operation of the press, and the threaded pillar 4 can be inserted through one side of the attachment substrate 5. A hole 5a is provided. Therefore, the mounting substrate 5 can be lowered below the upper end of the threaded column 4 made of multiple threads, and the movable body 10 is detachably attached to the lower portion of the mounting substrate 5. The movable body 10 is formed by superposing an upper plate 10a, an intermediate plate 10b, and a lower plate 10c, and a drive magazine 11 is attached on the intermediate plate 10b on one side of the upper plate 10a in a replaceable manner. A die 6 for providing a flange portion on the plate to be processed and a die receiving portion 7 for holding the die are mounted on the base table 2 so as to be adjacent to the threaded column 4.

  In FIG. 6, on one side of the movable body 10, a rotating cylinder 16 integrally provided with a large-diameter driving gear A composed of a multi-thread screw that moves up and down while being screwed into the screw pillar 4 and rotating. Provided in the drive magazine 11 transmitted through a transmission gear group 17 composed of a plurality of gears that are supported in a space 10e provided in the movable body and transmit the rotation of the gear A caused by the vertical movement of the movable body 10. Using the rotation of the output shaft 12 as a drive source, threading is performed by the processing means 22 including the tap shaft 40. That is, the processing means 22 uses the tap shaft 40 detachably attached to the chuck portion 14 provided at the lower portion of the holder 13 interlocked with the output shaft 12 provided in the drive cartridge 11 to perform burring processing and tapping processing on the work plate. Is performed continuously.

  A driving means 19 is provided by a threaded column 4 made of a multi-threaded screw and a rotary cylinder 16 having a driving gear A made of a multi-threaded screw supported in the movable body 10. The rotating cylinder 16 having the drive gear A screwed together is rotatably supported on the upper plate 10a and the lower plate 10c constituting the movable body 10 via bearings, respectively, and the lifting body 1a of the press machine. When the movable body 10 moves up and down together with the up and down movement, the drive gear A rotates while moving up and down. The stroke in which the movable body 10 moves up and down along the threaded column is the amount by which the tap shaft 40 is lowered, that is, the feed amount and the feed speed, and the rotational speed of the gear A is the output shaft 12 of the drive magazine 11. The number of rotations of the tap shaft 40 attached to the lower part of the holder 13 via the.

  The transmission gear group 17 is slightly fixed coaxially with a small-diameter gear D, which is a pinion meshed with a slightly larger gear C, which is fixed coaxially with a small-diameter gear B, which is a pinion meshing with the drive gear A of the driving means 19. It consists of a large-diameter gear E and is positioned on a straight line L in the space 10e in the movable body 10. The tooth portion of the gear E protrudes outwardly from the connecting surface 10f at the rear end of the upper plate 10a of the movable body 10 so that it can be easily engaged with the gear of the magazine.

  In FIGS. 8 and 9, a gear F that is positioned in front of the drive magazine 11 and meshes with a gear E provided on the movable body 10 is engaged with a gear G that is supported by an intermediate portion of the drive magazine. At the lower part of the output shaft 12, there is provided an engaging convex portion 12a that is formed in a square shape and is slightly longer in the vertical direction. The engaging convex portion 12a protrudes below the drive magazine 11 and is positioned in the space portion 10e. The engaging convex portion 12a is engaged with a slightly deep engaging concave portion 13a provided on the upper surface of the holder 13 and fixed in the circumferential direction. It is. The drive magazine 11 is detachably attached to an attachment portion 10d provided on the intermediate plate 10b on the upper rear side of the movable body 10.

  The engagement concave portion 13a provided at the center of the upper surface of the holder 13 and the engagement convex portion 12a of the output shaft 12 are engaged in the circumferential direction even when the holder is slightly moved up and down with respect to the output shaft 12. A movable body 10 is mounted so that it can move up and down within a certain range, and 13 is inserted through a bearing hole 15 provided in the lower plate 10c so as to be movable up and down. Further, the upper portion of the guide tube 25 inserted through the holder so as to be movable up and down is engaged with the hook portion 13b provided at the upper portion of the holder, and the inside of the plurality of spring holes 24 provided in the intermediate plate 10b and the guide tube 25 are engaged. A shock absorbing means 20 is provided by springing a spring 26 between the flange 25a provided at the lower part of the spring. Therefore, the holder 13 is mounted in the bearing hole 15 provided in the lower plate 10c so as to move up and down and rotate. When an impact is applied from below, the holder 13 moves up and down while compressing the buffer means 20 including the spring 26. Has the function of absorbing water.

  2, 3, and 4, an opening 33 a is provided at the center of the holding plate 33 of the holding means 32 that is attached to the lower part of the movable body 10 so as to be adjacent to the threaded column 4 made of the multi-threaded screw. A plurality of guide rods 35 attached to the lower portion of the lower plate 10c are inserted into a plurality of retaining holes 34 provided on one side of the lower plate 10c, and the presser plate is inserted into the guide rod 35 so as to be movable up and down. The holding plate 33 is supported so as to have a stopper function by hooking a locking portion 35a provided at the lower end of the collar to the lower surface of the holding hole 34 of the holding plate. Further, a plurality of springs 36 are elastically mounted between the lower plate 10c and a plurality of recesses 34a provided in the presser plate 33 so as to be movable up and down. Further, the die 6 is detachably mounted in the die receiving portion 7 mounted on the base table 2 below the pressing plate 33, the tap shaft 40 is positioned in the opening 33a of the pressing plate, and the tap shaft And the center of the die 6 are arranged on the same axis.

  A gear F, which is positioned approximately at the center of the drive magazine 11 and rotatably supports an output shaft 12 having a small gear G for output, and connects the gear G and the gear E provided with the transmission gear group is a gear. In accordance with the distance between E and the gear G, the position is adjusted in the vertical direction as shown by the arrow Y in FIG. That is, if the diameter of the gear G is large, the distance between the gears E and G becomes narrow, so the gear F is positioned below. Further, if the diameter of the gear G is small, the distance between the gears E and G increases, so that the gear F is positioned upward. Thus, the position of the gear F is adjusted in the vertical direction according to the type of drive magazine. Since the gear F is located in front of the drive magazine 11, it can be easily engaged with the gear E protruding from the connecting surface 10f of the movable body.

  5 and 6, the drive gear A provided on the movable body 10 and the gears B, C, D, E constituting the transmission gear group 17 are meshed with each other, and the gear F provided on the drive magazine 11 has a diameter of the gear. Accordingly, the gears A to E located on the straight line L and the shaft core of the gear G are axially supported with their positions shifted downward from the same straight line L on which the shaft cores are located. The small-diameter gear B and the slightly large-diameter gear C are attached to the first shaft 18, and the small-diameter gear D and the somewhat large-diameter gear E are attached to the second shaft 18a. The two shafts are pivotally supported on the upper plate 10a and the lower plate 10c via bearings. The position of the gears A to E and the gear G is positioned on the arrow Y line orthogonal to the straight line L where the axes of the gears G are positioned, and the position of the shaft is adjusted and attached to the drive cartridge. The gear F and the gear G are accommodated in the drive magazine 11 by combining gears synchronized with the rotational speed and the rotational speed of a special tap shaft 40 used for tapping, and matched with the rotational speed of the tap shaft 40. Several drive magazines are available. The gears A to E are respectively installed in the space 10e inside the movable body.

  The combinations of the gears A to E and the gears F and G are provided so as to match the rotational speed of the tap shaft 40 used for the pitch diameter to be processed. Here, when tapping, the relationship between the screw diameter and the screw lead is defined by JIS. For example, when machining a 1 mm lead thread groove, tapping is performed using a tap shaft 40 that rotates 36 times. In that case, the number of teeth of each gear is, for example, 45 for the drive gear A, 10 for the gear B, 48 for the gear C, 12 for the gear D, and 12 for the gear E. Is set to 40. Next, when the number of teeth of the gear F and the gear G provided in the drive magazine 11 is set to 20, and the gear A, which is the output gear, rotates once, the tap shaft 40 rotates 36 times.

  5 and 6, the rotation width 16 and the rotation speed of the rotating cylindrical body 16 integrated with the driving gear A screwed to the screw column 4 as the driving means 19 are rotated and rotated. The desired number of rotations of the tap shaft 40 mounted at the lower part of the holder 13 that forms the processing means 22 connected to the output shaft 12 in which one rotation of the rotating cylinder 16 is rotated via the gears A to E. It becomes. A predetermined tap shaft 40 and a drive magazine 11 that matches the number of rotations of the tap shaft are exchangeably mounted, and the tap shaft 40 and the drive magazine 11 can be replaced with a single screw processing device without using a plurality of screw processing devices. By simply exchanging, the tap shaft 40 of the processing means 22 can continuously perform the burring process and the tapping process in which a thread is provided on the inner surface of the flange portion provided by the burring process, thereby reducing labor and reducing costs. As a result, work efficiency can be improved.

  In FIG. 10, the tap shaft 40 is continuously provided with a spiral cutting blade portion 43 and a sloped spiral cutting blade portion 44 for tapping on the front side of the shaft rod 41 provided with a square-shaped fixing portion 42 at the rear end, An enlarged portion 46 for burring is provided via a small diameter portion 45 provided at the tip of the inclined spiral cutting edge 44, a curved chamfered portion 46a is formed on the tip peripheral surface of the enlarged diameter portion, and A small-diameter punch portion 47 for forming a hole is formed at the center of the distal end of the enlarged diameter portion. A plurality of different types of tap shafts 40 are prepared in order to match the pitch (lead) of a screw to be processed on the workpiece plate 50.

  Hereinafter, the case where burring and tapping are performed on the processed plate by the screw processing apparatus of the present embodiment will be described. The processed plate 50 is positioned in accordance with the center of the die 6 positioned on the base table 2. The movable body 10 mounted on the mounting board 5 attached to the elevating body 1a is continuously operated from the uppermost position to the lowermost position by operating the press 1 having a driving source (not shown) such as a motor or a hydraulic cylinder. , The rotation generated by the drive means 19 is accelerated by the transmission gear group 17 and lowered while rotating the tap shaft 40 of the processing means 22 to perform burring and tapping in one step continuously. After stopping the descent and rotation of the tap shaft 40 at the lowermost position, the tap shaft 40 is returned to the original uppermost position while reversely rotating the tap shaft, and the manual operation is completed.

  Since the descending amount of the movable body 10 attached to the mounting substrate 5 is determined by the shape of the spiral groove between the threaded portion of the threaded column 4 and the female thread of the tubular body 16, the tubular body is moved up and down by one rotation. The width is large, and it moves up and down about 10 to 20 mm, preferably about 15 to 20 mm in one rotation of the gear A which is a driving gear. For example, when machining a thread groove with a pitch of 1 mm, the drive magazine 11 for 36 rotations is attached to the rear portion of the upper plate 10a of the movable body 10 in order to set the rotation speed of the tap shaft 40 to 36 rotations.

  The 36 rotations of the tap shaft 40 are caused by the number of teeth of the gear B meshing with the gear A while the drive gear A (the number of teeth is 45) integrated with the rotary cylinder 16 constituting the driving means 19 descends while rotating once. Since there are 10 sheets, the gear B rotates 4.5 times. In this way, each gear rotates according to the number of teeth of each gear, and when the gear A rotates once, the gear E rotates 720 times. Since the gear groups A to E are constant and the gears are not exchanged, the rotation speed of the gears does not change even when tap shafts having different diameters are used.

  In order to set the number of rotations of the gear G in the drive magazine 11 to 36, the number of teeth of the gear F and the gear G is set to 20, and the number of teeth of the gear E is divided by 20 of the gear F. The rotation speed of F is 36 rotations, and the rotation speed of the gear G having the same number of teeth can be 36 rotations.

  By changing and adjusting the combination of the number of teeth of the gears F and G, it is possible to provide different types of drive magazines 11 that accommodate gear groups having different tap shaft rotation speeds, and the drive magazines 11 can be exchanged. By doing so, burring and tapping with different diameters can be continuously performed using one screw processing apparatus.

  As shown in FIGS. 11 to 14, in the burring process, when the descent of the movable body starts from the state before the start (FIG. 11), the tap shaft 40 of the processing means 22 is lowered while rotating by the drive of the driving means 19, The holding plate 33 of the holding means 32 attached to the lower part of the movable body 10 presses and holds the workpiece plate 50 on the die 6 and the die receiving portion 7 (FIG. 12). In this case, the spring 36 can absorb an impact when the work plate 50 is pressed against the die 6 and the die receiving portion 7 with the presser plate 33. Further, when the movable body 10 is lowered, the punch portion 46 of the tap shaft 40 descending in the opening 33a of the presser plate 33 hits the surface of the work plate 50 and punches out the small diameter punch hole 51 (FIG. 13). At that time, the spring 26 of the buffer means 20 that absorbs the impact hitting the surface of the work plate 50 while the tip of the tap shaft 40 rotates compresses to raise the holder 13 and absorb the impact. For this reason, it is possible to prevent the tip end of the tap shaft from being displaced from the punch mark or the tap shaft from being broken due to an impact when the tap shaft 40 contacts the surface of the work plate 50 while rotating.

  Further, when the tap shaft 40 is lowered while rotating, the small-diameter punch hole 51 punched by the punch portion 47 is surrounded by a slightly larger diameter enlarged portion 46 continuously provided in the punch portion 47. The portion is expanded on the peripheral surface while pressing downward toward the inner surface of the die 6 to form the flange portion 52 (FIG. 14), thereby completing the burring process. In this case, the peripheral portion connected to the punch hole 51 is uniform without applying excessive force locally by a chamfered portion 46a formed of a smooth curved surface provided at the lower end peripheral portion of the enlarged diameter portion 46 that descends while rotating. Since it is expanded while being bent downward by force, the occurrence of cracks in the inner edge of the punch hole 51 is prevented, and the flange portion 52 can be uniformly formed by the die 6 and the enlarged diameter portion 46.

  Next, tapping is performed continuously to the burring process. When the rotating tap shaft 40 descends continuously in the burring process, the tap shaft 40 further descends and the inclined spiral cutting blade continuously provided in the small diameter portion 45 provided at the rear portion of the enlarged diameter portion 46. The tapping process is started by the part 44, and the threading process on the inner surface of the flange part 52 is started (FIG. 14).

  In order to form the screw hole 53 in the inner wall of the flange portion 52 whose outer peripheral surface is held by the die 6 by the spiral cutting blade portion 43 having a predetermined diameter continuously provided on the upper portion of the inclined screw cutting blade portion 44, The thread can be smoothly formed without applying an excessive force to the inner wall of the flange portion 52. At the same time, the outer peripheral surface of the flange portion is neatly shaped by the die 6 positioned on the outer periphery of the flange portion 52 (FIG. 15).

  When the movable body 10 is lowered to a predetermined position, a limit switch (not shown) is actuated to stop the lowering of the movable body 10 and simultaneously the rotation of the tap shaft 40 is stopped (FIG. 15). That is, the tap shaft continues to rotate while the movable body is descending. Next, the movable body 10 also returns and rises, and since the gear A integrated with the cylindrical body 16 screwed into the threaded column 4 rises in the reverse direction, the tap shaft 40 interlocked with the gear A also rotates in the reverse direction. When it rises and returns to its original uppermost position, a limit switch (not shown) is actuated to stop the rise, and the rotation of the tap shaft 40 is also stopped.

  When the tap shaft 40 rises while rotating in the reverse direction, the spiral cutting blade portion 43 of the tap shaft comes out upward from the inside of the flange portion along the thread of the threaded hole 53 provided in the inner wall of the flange portion 52 (FIG. 16). When the movable body 10 is lifted and returned, the work plate 50 is prevented from rising by the holding plate 33 pushed downward by the spring force of the spring 36, and the work plate 50 is smoothly extracted from the die 6 and is the same as FIG. It returns to the state, and the burring and tapping performed continuously are finished.

  As described above, it is possible to perform baring processing and tapping processing on a processed plate by a mechanical drive means in one step continuously with a single device, so that it is not necessary to provide a plurality of expensive devices, so it is inexpensive. It is economical and requires less manpower, making it suitable for high-mix low-volume production. Furthermore, centering work of processed plates can be performed only once, further improving workability and reducing product costs. There are advantages that can be made.

It is a front view of the press machine provided with the screw processing apparatus. It is a front view of the principal part by which a processed board was mounted in a screw processing device, and it was partly fractured before processing. It is an expanded sectional view of the important section expanded by partially breaking before burring processing with a screw processing device. It is an expanded sectional view of the important section partially broken during tapping with a screw processing device. It is a top view of a movable body. It is a center longitudinal cross-sectional view of FIG. It is a front view of the state which removed the drive magazine from the movable body. It is a top view of a drive magazine. It is a center longitudinal cross-sectional view of FIG. It is a side view of a tap shaft. It is a principal part expanded sectional view before the action | operation of the tap shaft in a burring process. It is a principal part expanded sectional view before the fall start of the tap axis | shaft which hold | maintains a to-be-processed board to die | dye with a pressing board, and rotates. It is a principal part expanded sectional view of the state which punched the punched hole in the to-be-processed board in the punch part of the tap shaft. It is a principal part expanded sectional view which pushes down a tap axis | shaft, pushes the periphery of the punch hole provided in the to-be-processed plate in the enlarged diameter part, provides a flange part, and shows the state before the start of tapping. It is a principal part expanded sectional view of the state which taps the inner surface of a flange part with the spiral blade part of a tap shaft, and shapes the outer surface of a flange part with the die located outside. It is an important section expanded sectional view of the state where it raised and returned while reversely rotating a tap shaft, and it pulled out from the inside of a flange part of a processed plate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Press machine 2 Base stand 3 Support stand 4 Screw pillar 5 Mounting board 6 Die 10 Movable body 11 Drive magazine 12 Output shaft 13 Holder 16 Cylindrical body 17 Transmission gear group 19 Drive means 20 Buffer means 22 Processing means 25 Guide cylinder 26 Spring 32 Holding means 33 Presser plate 33a Opening 34 Latching hole 35 Guide rod 36 Spring 40 Tap shaft 41 Shaft rod 43 Spiral cutting blade portion 44 Slope spiral cutting blade portion 46 Expanded portion 47 Punch portion 50 Work plate 52 Flange portion 53 Screw hole A Drive gear B Gear C Gear D Gear E Gear F Gear G Gear

Claims (5)

A rotating cylinder (16) having a drive gear (A) is rotatably supported on a threaded column (4) whose lower end is fixed to a base base (2) of the press machine (1), and is moved up and down to the press machine. Drive means (19) for moving the movable body (10) attached to the liftable body (1a) provided in an up and down direction;
A transmission gear group provided in the movable body (10) for transmitting the rotation of the drive gear (A) due to the vertical movement of the movable body (10) to the output shaft (12) of the drive cartridge attached to the movable body in a replaceable manner. 17)
A spiral cutting edge portion (43) is provided at a lower portion of a holder (13) which is detachably connected to the output shaft (12) and is supported by the movable body (10) so as to move up and down and rotate and is protruded from below. It comprises processing means (22) removably attached with a tap shaft (40) provided with a sloped spiral cutting edge part (44), an enlarged diameter part (46) and a punch part (47),
An output provided in the drive cartridge (11) via the transmission gear group (17) for the rotation generated by the vertical movement of the movable body (10) having the drive gear (A) screwed to the screw column (4). It is transmitted to the shaft (12) and moved up and down while rotating the tap shaft of the processing means (22) attached to the output shaft via the holder (13), and installed on the die provided on the base table. A screw machining apparatus characterized by continuously performing burring and tapping on a workpiece plate to be processed.   The transmission gear group (17) includes a gear (C) that is coaxially supported with a gear (B) that meshes with the drive gear (A), and a gear that is coaxial with the gear (D) that meshes with the gear (C). The gear of the drive cartridge provided with a gear (E) and a gear (G) having an output shaft, the gears (E) supported being arranged on the same straight line and meshingly engaged with the gear (E). (G) is arranged on the straight line (L), and a drive gear (A) integrated with the drive cylinder (16) and a gear (G) having an output shaft (12) of the drive cartridge are connected. The screw machining apparatus according to claim 1, wherein:   The processing means (22) rotatably supports a holder (13) in a guide tube (25) accommodated in a space (10e) of a movable body so as to move up and down, and a lower part of the output shaft (12). An engaging protrusion (12a) provided on the holder and an engaging recess (13a) for fixing in the circumferential direction are provided a little deeper in the upper part of the holder, and the tap shaft (40) is detachably attached to the lower part of the holder. 2. A screw machining apparatus according to claim 1, further comprising a buffer means (20) comprising a spring or the like that absorbs the impact of the screw and a holding means (32) for pressing the work plate against the die.   The buffer means (20) urges a flange portion (25a) of a guide tube formed in the space portion (10e) of the movable body so as to be movable up and down downward by a plurality of springs (26). 25. The screw machining apparatus according to claim 1, wherein machining means (22) comprising 25), a holder (13) and a tap shaft (40) is provided so as to be movable up and down.   The holding means (32) is inserted into a guide rod (35) pivotally supported at the lower part of the movable body so that the presser plate (33) having an opening in the center is vertically movable, and the presser plate is attached downward. 2. A threading device according to claim 1, characterized in that it comprises a spring (26) for biasing.

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