JP2010023152A - Gear shaping machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain a desired smooth surface to be cut with sufficient accuracy even in a shaper blade repeatedly vertically moved at a relatively slow cutting speed when an outer peripheral surface of a portion in an axial direction of a workpiece with a shaft shape is cut by a gear shaping machine to form an engagement tooth. <P>SOLUTION: The gear shaping machine can form a plurality of engagement teeth 5 on the outer peripheral surface of the portion 22a in the axial direction of the workpiece 22 in its circumferential direction in the state that an axis 4 of the workpiece 22 with the shaft shape is vertically directed. The gear shaping machine 1 is provided with the shaper blade 36 repeatedly vertically moved I, J and cutting the outer peripheral surface of the portion 22a of the workpiece 22 at descending movement to form the engagement tooth 5; and a lubricant feeding device 48 for injecting and feeding oil mist 47 toward a cutting clearance 46 between a flank 36a of the shaper blade 36 at cutting and a surface 22b to be cut from above the cutting clearance 46. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a gear shaper that forms a plurality of engaging teeth such as gear teeth and chain teeth on the outer peripheral surface of a shaft-shaped workpiece.

  As a device for forming a plurality of engaging teeth on the outer peripheral surface of a shaft-shaped workpiece, there is a hobbing machine shown in Patent Document 1 below. According to this publication, the shaft formed by the hobbing machine is the crankshaft of the engine.

  The crankshaft includes a shaft body and a plurality of gear teeth formed on the outer peripheral surface of the shaft body along the circumferential direction of the shaft body. The shaft body includes a pair of crank main shafts arranged on an axis, a pair of crank webs integrally fixed to the respective base portions of the crank main shafts, and a crank mounted on both crank webs. With pins. The gear teeth are formed on the outer peripheral surface of the crank web.

  The hobbing machine includes a rotary table that supports a shaft-shaped workpiece for forming the crankshaft by a chuck so that the axial center thereof is vertically oriented, and a hob blade that rotates at high speed around a horizontal axis. . This hob blade repeatedly moves up and down while rotating at high speed. When the hob blade moves upward, the gear teeth are formed by cutting the outer peripheral surface of the portion of the workpiece corresponding to the crank web.

The hobbing machine is of a dry type, and no lubricating oil is used when cutting with the hob blade. Then, instead of this lubricating oil, compressed air is jetted by the jet nozzle toward the cutting gap between the relief surface of the hob blade and the surface to be cut of the workpiece.
JP 2006-272530 A

  By the way, according to the above conventional technique, there are the following problems.

  That is, there are cases where it is desired to provide the gear teeth at the base of the crankshaft of the crankshaft. In this case, the gear teeth are adjacent to the crank web in the axial direction of the crankshaft, and the crank web protrudes more outward in the radial direction than the gear teeth. For this reason, when it is going to form the said gear teeth with a hob blade, the said crank web interferes with this hob blade, and there exists a possibility that formation of the said gear teeth may be difficult.

  Therefore, it is conceivable to use a gear shaper instead of the hobbing machine, and to form the gear teeth while avoiding interference with the crank web by using a shaper blade that is repeatedly moved up and down. However, since the shaper blade moves up and down as described above, the cutting speed is usually slower than the rotating hob blade. For this reason, if lubricating oil is not used for cutting as in the prior art described above, a smooth and accurate desired surface to be cut may not be obtained.

  It is also conceivable to use a large amount of coolant for the above-mentioned cutting as in a conventional gear shaper. However, since the coolant is originally poor in lubricity, it is still difficult to obtain a desired cutting surface with high accuracy.

  The present invention has been made paying attention to the above situation, and an object of the present invention is to form an engagement tooth by cutting a part of the outer peripheral surface in the axial direction of a shaft-shaped workpiece with a gear shaper. In this case, a smooth and accurate desired surface to be cut can be obtained even with a shaper blade that repeatedly moves up and down at a relatively slow cutting speed.

According to the first aspect of the present invention, a plurality of engaging teeth 5 are formed in the circumferential direction on the outer circumferential surface of a portion 22a in the axial direction of the workpiece 22 in a state where the axial center 4 of the shaft-shaped workpiece 22 is oriented vertically. A gear shaper,
The shaper blade 36 that repeatedly moves up and down I and J and cuts the outer peripheral surface of the part 22a of the workpiece 22 to form the engaging teeth 5 during the downward movement J, and the relief surface 36a of the shaper blade 36 during the cutting A gear shape machine comprising a lubricating oil supply device 48 that supplies oil mist 47 by spraying oil mist 47 from above the cutting gap 46 toward the cutting gap 46 between the surface to be cut 22b. It is.

  According to a second aspect of the present invention, there is provided an oil mist generator 52 for generating the oil mist 47 by the lubricating oil supply device 48 joining the compressed air 57 and the lubricating oil 60 which are individually pumped, and the oil mist. The extending end 62a extends from the generator 52, and extends downward into a workpiece side gap 67 between the outer surface of the movement locus 66 of the shaper blade 36 and the outer surface of the workpiece 22 facing the outer surface of the movement locus 66. The oil mist 47 generated by the oil mist generator 52 flows through the supply pipe 62 and is jetted downward from the extended end 62a of the supply pipe 62. The gear shaper according to claim 1, wherein the gear shaper is supplied to the cutting gap through the workpiece side gap.

  According to a third aspect of the present invention, the lubricating oil supply device 48 includes an air pipe 64 that introduces compressed air 57 into the oil mist generator 52 and an oil pipe 65 that introduces lubricating oil 60 into the oil mist generator 52. The gear shaper according to claim 2, wherein the oil mist generator is provided separately and the oil mist generator is disposed in the vicinity of the workpiece side gap.

  According to a fourth aspect of the present invention, there is provided a cover 70 for preventing swarf 44 from being scattered from the outside to cover a part 22a of the workpiece 22 at the time of cutting by the shaper blade 36. It is a gear shaper as described in any one of them.

  In addition, in this section, the reference numerals and drawing numbers appended to the above terms are not intended to limit the technical scope of the present invention to the “Example” section and the contents of the drawings described later.

  The effects of the present invention are as follows.

The invention according to claim 1 is a gear shaper that forms a plurality of engaging teeth in the circumferential direction on a part of the outer circumferential surface in the axial direction of the workpiece in a state where the axis of the shaft-shaped workpiece is oriented vertically. There,
A gap for cutting between the shaper blade that repeatedly moves up and down and cuts the outer peripheral surface of a part of the workpiece to form the engaging teeth during the downward movement, and the flank of the shaper blade and the surface to be cut during the cutting And a lubricating oil supply device for injecting and supplying oil mist from above the cutting gap.

  For this reason, the cutting is performed by a shaper blade that moves up and down, and the cutting speed by the shaper blade is slower than that of the hob blade. Since oil mist is jetted and supplied to the cutting gap between the two, the machining point, which is a cutting portion by the shaper blade, is effectively lubricated by a small amount of mist-like lubricating oil. Therefore, even when the engaging teeth are formed by the shaper blade having a relatively slow cutting speed by repeatedly moving up and down as described above, the surface to be cut by the shaper blade can be smooth and accurate.

  According to a second aspect of the present invention, there is provided an oil mist generator for generating the oil mist by combining the compressed oil and the lubricating oil, which are individually pumped, and the oil mist generator extending from the oil mist generator. A supply pipe whose extending end is disposed downward in a workpiece-side gap between the outer surface of the movement locus of the shaper blade and the outer surface of the workpiece facing the outer surface of the movement locus, The oil mist generated by the oil mist generator flows through the supply pipe, is sprayed downward from the extended end of the supply pipe, and is supplied to the cutting gap through the workpiece side gap. Yes.

  In other words, since the extended end of the supply pipe is disposed downward in the workpiece side gap between the movement trajectory of the shaper blade and the outer surface of the workpiece, the extended end of the supply pipe is disposed on the shaper blade. It is arranged closer to the cutting gap between the flank and the surface to be cut. Accordingly, since the oil mist can be effectively supplied to the cutting gap without waste, the machining point by the shaper blade is more reliably lubricated by a smaller amount of lubricating oil.

  According to a third aspect of the present invention, the lubricating oil supply device individually includes an air pipe that introduces compressed air into the oil mist generator and an oil pipe that introduces lubricating oil into the oil mist generator.

  For this reason, compared with making the said air pipe and an oil pipe into a double pipe structure, the structure of the said lubricating oil supply apparatus can be simplified.

  Further, the oil mist generator is arranged in the vicinity of the workpiece side gap.

  For this reason, since the supply pipe can be made shorter, it is possible to prevent the lubricating oil from separating from the oil mist flowing in the supply pipe and adhering to the inner surface of the supply pipe. Therefore, since the oil mist is supplied to the cutting gap more reliably in the mist state, the lubrication of the processing point by the shaper blade is further effectively performed with a smaller amount of lubricating oil.

  According to a fourth aspect of the present invention, there is provided a cover for preventing scattered dust from covering a part of the workpiece during cutting by the shaper blade from the outside.

  For this reason, it is more reliably prevented by the said cover that the cutting waste produced by the cutting of the said shaper blade is scattered greatly. Therefore, it is prevented more reliably that the formation operation | work of the said engagement tooth is inhibited by scattering of cutting waste.

  The shaper of the present invention relates to a shaper that repeatedly moves up and down at a relatively slow cutting speed when an engagement tooth is formed by cutting a part of the outer peripheral surface in the axial direction of a shaft-shaped workpiece with a gear shaper. The best mode for carrying out the present invention is as follows in order to achieve the object of obtaining a smooth and accurate desired cut surface even with a blade.

  This is a gear shaper that forms a plurality of engaging teeth in the circumferential direction on a part of the outer circumferential surface in the axial direction of the workpiece in a state where the axis of the shaft-shaped workpiece is vertically oriented. This gear shaper has a shaper blade that repeatedly moves up and down and cuts the outer peripheral surface of a part of the workpiece to form the engagement teeth when moving downward, and the flank and cut surface of the shaper blade at the time of cutting And a lubricating oil supply device that injects and supplies oil mist from above the cutting gap toward the cutting gap.

  In order to explain the present invention in more detail, an embodiment thereof will be described with reference to the accompanying drawings.

  1-4, the code | symbol 1 is a gear shaper. A shaft body 2 formed by the gear shaper 1 is a crankshaft of a single cylinder engine. For convenience of explanation, the arrow Fr is assumed to be the front, and the left-right direction described below refers to the direction toward the front.

  The shaft body 2 includes a shaft body main body 3 and a plurality of engaging teeth 5 formed on the outer peripheral surface of the shaft body main body 3 along the circumferential direction around the axis 4 of the shaft body main body 3. Yes. The shaft body 3 includes a pair of crank main shafts 7 and 7 arranged on the shaft center 4 and a pair of crank webs 8 integrally fixed to the bases of the crank main shafts 7 and 7. 8 and a crank pin 9 installed on both the crank webs 8 and 8. The engagement teeth 5 are gear teeth and are formed on the outer peripheral surface of the base of each crank main shaft 7 adjacent to each crank web 8 in the axial direction of the shaft body 2.

  The gear shaper 1 is a rotary table supported by the bed 12 so as to be able to be rotationally driven A in one direction around an axis 13 extending in the vertical direction and a bed 12 which is a stationary side member extending horizontally. 14, a collet chuck 15 supported on the rotary table 14 on the shaft center 13 and capable of being rotationally driven A together with the rotary table 14, and standing on the bed 12 in the vicinity of the rear of the rotary table 14. A column 17 provided, a center support 18 projecting forward from the column 17 and supported by the column 17 so as to be able to move up and down B, C, and the protruding end of the 18 on the shaft 13 A center 19 supported by the portion and located below the center support 18 and projecting forward from the column 17 so that the column 17 can be moved vertically. And a workpiece gripper 20 is lifting. The center support 18 and the work gripper 20 can be fixed to the column 17 at arbitrary positions in the vertical direction of the column 17, respectively.

  The shaft-shaped workpiece 22 for forming the shaft body 2 has a posture in which the axis 4 is vertically oriented (vertical). The lower crankshaft 7 of the work 22 is detachably secured to the chuck 15 on the shaft center 13 of the rotary table 14. The upper end portion of the work 22 is supported by the center 19. The work gripper 20 can grip the crank pin 9 of the shaft body 3. In the state of FIG. 2, the work gripper 20 is detached from the crankpin 9 of the shaft body 3.

  The gear shaper 1 is erected on the bed 12 in the vicinity of the front of the rotary table 14 and is supported by the other column 24 supported by the bed 12 so as to be movable forward and backward. A cutter head 25 supported by the other column 24 so as to protrude rearward from the upper part of the other column 24 is provided. The cutter head 25 includes upper and lower heads 26 and 27. The rear surface 28 of the upper head 26 is located behind the rear surface 29 of the lower head 27. The transition surface 30 from one of the rear surfaces 28 and 29 to the other is an inclined surface extending rearward and upward.

  Inside the cutter head 25, there are provided a movable base 33 which can be moved back and forth with respect to the cutter head 25, and a support shaft 35 having an axial center 34 extending in the vertical direction. The support shaft 35 is supported by the movable base 33 so as to be movable in the axial direction and to be rotatable around the axis 34. The lower end portion of the support shaft 35 protrudes downward from the lower surface of the cutter head 25. On the shaft 34, a truncated cone-shaped bevel gear-shaped shaper blade 36 is supported on the lower end portion of the support shaft 35 as a whole. The rear surface 29 of the lower head 27 is positioned slightly forward of the rear end of the shaper blade 36.

  A worm wheel 38 located on the shaft center 34 is attached to the support shaft 35. The support shaft 35 is linked to a drive device (not shown) via the worm wheel 38 and a worm gear 39 meshing with the worm wheel 38. The support shaft 35 is accompanied by a shaper blade 36 supported by the support shaft 35 and can be rotationally driven H in one direction. In this case, the diameter of the worm wheel 38 is increased in order to reduce the speed of the rotational drive H of the support shaft 35 to a desired low speed. Therefore, the worm wheel 38 is provided inside the upper head 26 having a larger internal space in the horizontal direction than the lower head 27.

  The support shaft 35 is repeatedly moved up and down I and J by a drive device 41 with a shaper blade 36 supported by the support shaft 35. The movable table 33 is repeatedly moved back and forth K and L by another driving device 42 with the support shaft 35 and the shaper blade 36 supported by the support shaft 35.

  The rotation drive A of the rotary table 14 and the chuck 15 and the rotation drive H of the shaper blade 36 are synchronized with each other. Further, the vertical movements I and J of the support shaft 35 and the back-and-forth movements K and L of the movable base 33 are interlocked so as to be synchronized with each other. A portion 22a in the axial direction of the work 22 corresponds to the upper engagement tooth 5 of the upper and lower engagement teeth 5 and 5, and each drive of the chuck 15 and the shaper blade 36 causes the work 22 to move. The outer peripheral surface of the portion 22a is cut to form the upper engaging tooth 5.

  Specifically, first, as indicated by a one-dot chain line in FIG. 1, the shaper blade 36 is positioned above the portion 22 a of the work 22 corresponding to the upper engaging tooth 5. From this state, the shaper blade 36 moves downward J together with the support shaft 35. As shown by the solid line in FIGS. 1 and 2, the cutting edge of the shaper blade 36 is positioned below the part 22 a of the workpiece 22. During the downward movement J of the shaper blade 36 described above, the outer peripheral surface of the part 22a of the workpiece 22 is cut. At this time, the cutting waste 44 falls below the part 22 a of the workpiece 22.

  Next, the shaper blade 36 is moved forward K together with the movable base 33, and the shaper blade 36 is slightly separated forward from the work 22 portion. Next, the shaper blade 36 moves up I together with the support shaft 35. Next, the shaper blade 36 moves rearward L together with the movable base 33, and the shaper blade 36 reaches the upper position (the chain line in FIG. 1) of the part 22a of the workpiece 22 which is the original position.

  Thereafter, the movements I to L of the shaper blade 36 described above are repeated, and during this time, the workpiece 22 is rotationally driven A along with the rotary table 14 and the chuck 15, and the shaper blade 36 is rotationally driven H together with the support shaft 35. As a result, the engagement teeth 5 are gradually formed.

  When the portion 22a of the workpiece 22 is cut by the downward movement J of the shaper blade 36, the flank (an inclined surface on the upper surface side of the blade edge) 36a of the shaper blade 36 and the surface 22b to be cut of the portion 22a of the workpiece 22 A lubricating oil supply device 48 is provided for injecting and supplying oil mist 47 from above the cutting gap 46 toward the cutting gap 46 therebetween.

  The lubricating oil supply device 48 includes a bracket 51 attached to the lower end portion of the rear surface 29 of the lower head 27 by a fastener 50, and a plurality of (front and rear pair) oils supported by the bracket 51 and generating the oil mist 47. Mist generators 52 and 52 are provided. Each of these oil mist generators 52 is disposed in the vicinity of the cutting gap 46. Each of the oil mist generators 52 is formed with an air passage 53 penetrating in the horizontal direction on the left and right sides, and an oil passage 54 having a downstream end communicating with a midway portion in the longitudinal direction of the air passage 53. A midway portion of the air passage 53 and a downstream end of the oil passage 54 serve as a junction 55 of both the passages 53 and 54.

  The lubricating oil supply device 48 includes an air compressor 58 capable of supplying approximately 0.5 MPa of compressed air 57 to one end of the air passage 53 via a solenoid type on-off valve 56, and an upstream end of the oil passage 54. An oil pump 61 capable of supplying the lubricating oil 60 in the oil tank 59 at about 0.8 to 1 MPa and the oil mist generator 52 so that the other end of the air passage 53 communicates with the cutting gap 46 side. And a supply pipe 62 extending from.

  The lubricating oil supply device 48 includes an air pipe 64 that introduces compressed air 57 that is pumped from the air compressor 58 into the air passage 53 of the oil mist generator 52, and a lubricating oil 60 that is pumped from the oil pump 61. And an oil pipe 65 for introducing the oil into the oil passage 54. The air pipe 64 and the oil pipe 65 are provided separately. For this reason, the compressed air 57 and the lubricating oil 60 are individually pumped and flowed into the oil mist generator 52. The oil mist generator 52 is disposed in the vicinity of the workpiece side gap 67. The extension end 62 a of the supply pipe 62 faces the outer surface on the upper side (the chain line in FIG. 1) of the movement locus 66 of the shaper blade 36 and the outer surface on the upper side of the movement locus 66. Is disposed downward in a workpiece-side gap 67 between the outer surface of the workpiece and the outer surface of the workpiece.

  The compressed air 57 that has been pressure-fed through the air passage 53 from the air compressor 58 and the lubricating oil 60 that has flowed through the oil passage 54 from the oil pump 61 are impacted together at the junction 55. As a result, oil mist 47 is generated at the junction 55. The oil mist 47 flows from the oil mist generator 52 through the supply pipe 62 and is jetted downward from the extended end 62a. The injected oil mist 47 is supplied to the cutting gap 46 through the workpiece side gap 67, and the machining point which is a cutting portion of the part 22a of the workpiece 22 by the shaper blade 36 is lubricated.

  As described above, a plurality of (two) supply pipes 62 are provided. The extended ends 62a of the supply pipes 62 are arranged toward a plurality of (two) processing points in the circumferential direction around the axis 34 of the shaper blade 36. And the oil mist 47 is simultaneously injected toward each said process point from each said extended end 62a.

  2 and 3, a cover 70 is provided for preventing scattering of cutting waste 44 that covers a part 22a of the workpiece 22 at the time of cutting by the shaper blade 36 from the rear side and the outer sides on the left and right sides. The cover 70 is made of sheet metal or resin, and includes upper and lower covers 71 and 72 provided individually. The upper cover 71 is supported by the center support 18 and is moved up and down B and C together with the center support 18. The lower cover 72 is supported by the work gripper 20 and is moved up and down D and E together with the work gripper 20.

  The upper and lower covers 71 and 72 are formed in a U-shape that opens forward in the plan view of the gear shaper 1. Specifically, the upper and lower covers 71 and 72 include a main cover plate 74 extending in the vertical direction and left and right, respectively, and a pair of side cover plates 75 extending forward from the left and right ends of the main cover plate 74. 75. The upper part of the lower cover 72 is fitted to the lower part of the upper cover 71, and the lower part of the upper cover 71 and the upper part of the lower cover 72 are overlapped in the horizontal direction.

  The upper part of the main cover plate 74 of the upper cover 71 is disposed close to the rear surface 28 of the upper head 26. The front end edge of each side cover plate 75 of the upper cover 71 is disposed close to the rear surface 29 of the lower head 27. Further, the upper edge of each side cover plate 75 of the upper cover 71 is disposed close to the transition surface 30.

  The cutting waste 44 generated from the cut surface 22b of the part 22a of the workpiece 22 due to the cutting of the shaper blade 36 tends to scatter greatly from the part 22a side of the workpiece 22 to the rear, each side, and above. This is prevented by the cover 70 and the transition surface 30.

  FIG. 5 shows a state in which the cutter head 25 and the shaper blade 36 are moved forward F together with the other column 24. According to this, one assembly of the rotary table 14, chuck 15, work 22 (or shaft body 2), and cover 70, the other column 24, the cutter head 25, the shaper blade 36, and the lubricant supply The other assembly by the device 48 is largely separated from the front and rear, and by using the space between the two assemblies, maintenance and inspection work for the shaper blade 36, the lubricating oil supply device 48, etc. are easy. Can be.

  6 shows that the chuck 15 detaches the workpiece 22 (or the shaft body 2) from the state shown in FIG. 5, while the workpiece gripper 20 grips the workpiece 22, and the center support 18 and the workpiece gripper 20 are separated from each other. Each of the center support 18 and the work gripper 20 moves upward and downward B and D, and is separated from each other in the vertical direction. This state shows a state immediately before the workpiece 22 (or the shaft body 2) is fixed to the chuck 15 or just after the workpiece 22 is detached.

  According to the above configuration, the shaper blade 36 that repeatedly moves up and down I and J and cuts the outer peripheral surface of the part 22a of the workpiece 22 to form the engaging teeth 5 during the downward movement J, and the shaper blade at the time of the cutting. And a lubricating oil supply device 48 for injecting and supplying oil mist 47 from above the cutting gap 46 toward the cutting gap 46 between the flank 36a and the surface 22b to be cut.

  For this reason, the cutting is performed by the shaper blade 36 that moves up and down I and J, and the cutting speed by the shaper blade 36 is slower than that of the hob blade. Since oil mist 47 is sprayed and supplied to the cutting gap 46 between the surface 36a and the surface 22b to be cut, lubrication of the machining point, which is a cutting portion by the shaper blade 36, is a small amount of mist. The lubricating oil 60 is effectively used. Therefore, even when the engaging teeth 5 are formed by the shaper blade 36 having a relatively slow cutting speed by repeatedly moving up and down I and J as described above, the surface 22b to be cut by the shaper blade 36 is made smooth and accurate. be able to.

  Further, as described above, the lubricating oil supply device 48 joins the compressed air 57 and the lubricating oil 60 that are individually pumped together to generate the oil mist 47, and the oil mist generation. A workpiece side between the outer surface of the workpiece 22 that extends from the vessel 52 and whose extension end 62a faces the outer surface of the movement locus 66 of the shaper blade 36 on the upper surface of the movement locus 66. A supply pipe 62 disposed downward in the gap 67, and the oil mist 47 generated by the oil mist generator 52 flows through the supply pipe 62, and extends downward from an extension end 62 a of the supply pipe 62. And is supplied to the cutting gap 46 through the workpiece-side gap 67.

  That is, since the extended end 62a of the supply pipe 62 is disposed downward in the work side gap 67 between the upper surface of the movement locus 66 of the shaper blade 36 and the outer surfaces of the work 22, the supply pipe 62 The extended end 62a of the 62 is disposed closer (about 50 mm or less) to the cutting gap 46 between the clearance surface 36a of the shaper blade 36 and the surface 22b to be cut. Therefore, since the oil mist 47 is effectively supplied to the cutting gap 46 without waste, the lubrication of the processing point by the shaper blade 36 is more reliably performed by the smaller amount of the lubricating oil 60.

  Further, as described above, the lubricating oil supply device 48 individually includes the air pipe 64 that introduces the compressed air 57 into the oil mist generator 52 and the oil pipe 65 that introduces the lubricating oil 60 into the oil mist generator 52. In preparation.

  For this reason, the configuration of the lubricating oil supply device 48 can be simplified as compared with the double pipe structure of the air pipe 64 and the oil pipe 65.

  Further, the oil mist generator 52 is arranged in the vicinity of the workpiece side gap 67.

  For this reason, since the supply pipe 62 can be made shorter, it is possible to prevent the lubricating oil 60 from separating from the oil mist 47 flowing in the supply pipe 62 and adhering to the inner surface of the supply pipe 62. Therefore, the oil mist 47 is supplied to the cutting gap 46 more reliably in the mist state, so that the lubrication of the processing point by the shaper blade 36 is further effectively performed by a smaller amount of the lubricating oil 60. Made.

  Further, as described above, the cover 70 for preventing scattering of the cutting waste 44 covering the part 22a of the workpiece 22 at the time of cutting by the shaper blade 36 from the outside is provided.

  For this reason, the cover 70 can more reliably prevent the cutting waste 44 generated by the cutting of the shaper blade 36 from being greatly scattered. Therefore, it is more reliably prevented that the forming operation of the engaging teeth 5 is hindered by the scattering of the cutting waste 44.

  In addition, although the above is based on the example of illustration, the crankshaft which is the said shaft body 2 may be a thing of a multicylinder engine. Further, the engagement teeth 5 formed by cutting with the gear shaper 1 may be teeth of a chain wheel. In addition, the oil mist generator 52 in the lubricating oil supply device 48 may be single, or may be three or more. Further, the upper cover 71 may be provided with a ceiling plate that is installed on the upper edge of the both side cover plates 75, 75.

FIG. 3 is a partial enlarged partial sectional view of FIG. 2. It is a whole side view of a gear shaper. FIG. 3 is a partial plan sectional view of FIG. 2. FIG. 4 is a partial rear view of FIG. 3. It is a figure which shows an effect | action, and is a figure equivalent to FIG. It is a figure which shows another effect | action, and is a figure equivalent to FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gear shaper 2 Shaft body 3 Shaft body 4 Shaft center 5 Engagement tooth 22 Work part 22a Part 22b Surface to be cut 24 Other column 25 Cutter head 36 Shaper blade 36a Flank 44 Cutting waste 46 Cutting gap 47 Oil mist 48 Lubricating oil supply device 52 Oil mist generator 53 Air passage 54 Oil passage 55 Junction point 57 Compressed air 58 Air compressor 60 Lubricating oil 61 Oil pump 62 Supply pipe 62a Extension end 64 Air pipe 65 Oil pipe 66 Movement locus 67 Workpiece Side clearance 70 Cover 71 Upper cover 72 Lower cover A Rotation drive H Rotation drive I Up movement J Down movement K Forward movement L Rear movement

Claims (4)

A gear shaper that forms a plurality of engaging teeth in the circumferential direction on a part of the outer circumferential surface in the axial direction of the workpiece in a state where the axis of the shaft-shaped workpiece is vertically oriented,
A gap for cutting between the shaper blade that repeatedly moves up and down and cuts the outer peripheral surface of a part of the workpiece to form the engaging teeth during the downward movement, and the flank of the shaper blade and the surface to be cut during the cutting A gear shaper comprising: a lubricating oil supply device that injects and supplies oil mist from above the cutting gap.   The lubricating oil supply device joins the compressed air and the lubricating oil that have been individually pumped together to generate the oil mist, and the oil mist generator extends from the oil mist generator. A supply pipe arranged downward in a work side gap between the outer surface of the movement locus of the shaper blade and the outer surface of the workpiece facing the outer surface of the movement locus, and is generated by the oil mist generator. The oil mist flows through the supply pipe, is sprayed downward from an extended end of the supply pipe, and is supplied to the cutting gap through the workpiece side gap. The gear shaper according to 1.   The lubricating oil supply device separately includes an air pipe that introduces compressed air into the oil mist generator and an oil pipe that introduces lubricating oil into the oil mist generator, and the oil mist generator is connected to the workpiece side gap. The gear shaper according to claim 2, wherein the gear shaper is arranged in the vicinity of.   The gear shaper according to any one of claims 1 to 3, further comprising a cover for preventing dust from being scattered to cover a part of the workpiece during cutting by the shaper blade from the outside. .

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