JP2009226505A - Gear shaving apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gear shaving apparatus improving the rigidity of a shaving cutter and preventing the deterioration of a machining accuracy caused by catching of chips, with an appropriate amount of cutting fluid. <P>SOLUTION: This gear shaving apparatus is provided with: a shaving cutter body 31 having a plurality of through-holes 35k1 and the like; a cutter spindle inner cylinder 32 disposed at a central part of the shaving cutter body 31, and having a plurality od radial oil passages 37h1 and the like that are disposed on a same radial line to columns of an axial oil passage 39 axially extendingly formed at the central part and the through-holes 35k1 and the like into a plurality of columns, opened to the axial oil passage 39 and the like at the radial inner ends of the respective columns and opened to the circumferential face at the radial outer ends; and a cutter spindle outer cylinder 33 positioned between the shaving cutter body 31 and the cutter spindle inner cylinder 32, and having a plurality of slits 41a that are disposed on the same radial line to the columns of the through-holes 35k1 and the like and formed circumferentially isolated at the respective columns. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a gear shaving apparatus, and more particularly, to a gear shaving apparatus that increases the rigidity of a blade of a shaving cutter and prevents chipping.

Generally, a gear shaving apparatus is used as a processing apparatus that finishes a tooth surface of a gear that has been cut by a hob, a pinion cutter, or an overall milling cutter, leaving a slight finishing allowance.
As this type of gear shaving processing device, a relief groove of a groove cutting tool used for serration groove machining is formed at the tooth bottom of a shaving cutter, and the cutting oil supplied into the main shaft of the shaving processing device is formed in this relief groove. There is known one in which a cutting oil passage through which the gas passes is opened (see, for example, Patent Document 1).
In a conventional gear shaving processing apparatus, a large amount of cutting oil in the main shaft is ejected from the relief groove opening of the tooth bottom portion toward each tooth tip portion through the cutting oil passage, and chips are discharged from the tooth portion. I have to.
Japanese Utility Model Publication No. 61-184623

However, in the above-described gear shaving processing apparatus, the relief groove of the shaving cutter has a shape that pierces the tooth base of the shaving cutter, so that the rigidity of the tooth base is reduced and cutting applied to the shaving cutter during processing is performed. There is a problem that the shaving cutter is bent by the load and the processing accuracy is deteriorated.
Moreover, in order to discharge the chips generated during processing, a large amount of cutting oil is ejected from the opening of the escape groove toward each tooth tip, but it is ejected toward all the tooth tips of the shaving cutter. Therefore, the cutting oil supplied to the processing portion where the workpiece and the tooth tip portion contact each other is reduced, and it cannot be said that sufficient supply is made. Therefore, there is a problem that the chips cannot be completely discharged from the processed part, and the chips remaining in the processed part may be bitten by the tooth tip, which may cause deterioration of the processing accuracy.
In addition, since the cutting oil is sprayed toward all the tooth tips of the shaving cutter, a large amount of cutting oil is required because it is supplied in large quantities to unnecessary parts that have not been processed. was there.
An object of the present invention is to solve the above-described conventional problems and achieve the following objects. That is, an object of the present invention is to provide a gear shaving processing device that increases the rigidity of a shaving cutter and prevents deterioration of processing accuracy due to biting of chips with an appropriate amount of cutting oil.

  In order to achieve the above object, the gear shaving apparatus according to the present invention includes: (1) a central hole formed in the central portion extending in the axial direction and an axial line that opens at the tooth bottom of the central hole and the serration groove; A shaving cutter body having a plurality of through holes formed in a plurality of rows spaced apart in the direction and formed in each row at an equal angle in the circumferential direction toward the center hole, and disposed in the central portion of the shaving cutter body A plurality of axial oil passages formed in the central portion extending in the axial direction and arranged on the same radiation as the rows of the through holes, and the axial oil passages at the radial inner ends of the respective rows. A cutter shaft inner cylinder having a plurality of radial oil passages opened to the peripheral surface at the radial outer end, and located between the shaving cutter main body and the cutter shaft inner cylinder, the same as the row of the through holes Multiple rows on radiation A cutter shaft outer cylinder having a plurality of slits formed circumferentially separated in each row, and any one of the cutter shaft inner cylinder and the cutter shaft outer cylinder together with the shaving cutter body It is characterized by being rotated.

With this configuration, the through hole is formed so as to open at the tooth bottom portion of the serration groove, so that when the serration groove of the shaving cutter is machined with the groove machining bit of the serration groove, the through hole functions as a clearance of the groove machining bit For this reason, it is not necessary to separately form a relief hole in the tooth trace direction. Since the relief hole is not formed in the tooth bottom portion, the tooth thickness of each tooth root portion is larger than that of the conventional one, and the rigidity of the tooth root portion is increased as compared with the conventional one.
Further, since the cutting oil is discharged directly from the opening portion of the through-hole toward the cutting portion, chips generated during cutting are quickly discharged together with the cutting oil and prevented from being bitten by the shaving cutter. . As a result, deterioration of processing accuracy due to biting is prevented.
In addition, since either the cutter shaft inner cylinder or the cutter shaft outer cylinder is rotated together with the shaving cutter body, the cutting oil enters the through hole of the shaving cutter body only from the radial oil passage communicating with the slit. Inflow. As a result, the cutting oil reaches the required amount of cutting oil before the start of cutting, the required amount of cutting oil is maintained in a constant state during cutting, and the supply is quickly stopped upon completion of cutting. Therefore, the cutting oil in the axial oil passage is supplied to the cutting portion in a state where the workpiece is being cut, so that the cutting oil is supplied to the tooth portion of the other workpiece that has not been cut. Therefore, the amount of cutting oil can be reduced, and the cutting oil required for cutting can be reduced.

  In the gear shaving apparatus described in (1) above, preferably (2) among the slits of the cutter shaft outer cylinder, adjacent two rows of slits are staggered.

  With this configuration, two adjacent rows of slits are arranged in a staggered manner, so that when the cutting oil is discharged from the opening portion of the through hole toward the cutting portion, one of the slits communicated with the through hole. The state can be maintained, and the supply of cutting oil is not interrupted. As a result, chips generated during cutting are quickly discharged together with the cutting oil and are prevented from being bitten by the shaving cutter, thereby preventing deterioration in processing accuracy due to biting.

  Preferably, in the gear shaving processing device according to (1) or (2), (3) the shaving cutter body extends in an axial direction on an inner wall portion surrounding the central hole of the shaving cutter body. And a communication groove that communicates the opening portion of the through hole, and the plurality of through holes are configured to open at the communication groove.

  With this configuration, the cutting oil that has flowed into the axial oil passage of the inner cylinder of the cutter shaft flows into the radial oil passage that communicates with the slit, and further circulates through the slit to communicate with the communication groove of the shaving cutter body. Flow into. The cutting oil that has flowed into the communication groove flows through the through hole, and is discharged from each tooth bottom portion to the cutting portion along the serration groove. Since the cutting oil once flows into the communication groove, it flows through the through hole regardless of the communication state between the radial oil passage and the slit. Thus, new cutting oil is always discharged from the through hole toward the cutting portion, and the chips are discharged together with the cutting oil from the cutting portion.

  In the gear shaving processing apparatus according to the above (1) to (3), (4) the cutter so that the slits of the cutter shaft outer cylinder and the through holes of the shaving cutter main body communicate with each other. The shaving cutter main body is fixed to the shaft outer cylinder, the cutter shaft outer cylinder and the shaving cutter main body rotate together, and the cutter shaft inner cylinder directs the opening of the radial oil passage toward the workpiece. Configured to be stationary.

  With this configuration, each slit functions as an on-off valve that opens and closes the cutting oil passage, so that the cutting oil flows into the through hole of the shaving cutter body only from the radial oil passage communicating with the slit. As a result, the cutting oil reaches the required amount of cutting oil before the start of cutting, the required amount of cutting oil is maintained in a constant state during cutting, and the supply is quickly stopped upon completion of cutting. Since the opening of the radial oil passage of the cutter shaft inner cylinder faces the direction of the work piece, the cutting oil in the axial oil passage is quickly applied directly to the cutting part while the work piece is being cut. Supplied. Therefore, the cutting oil is not supplied to the teeth of other workpieces that are not cut, the amount of cutting oil can be reduced, and the cutting oil required for cutting can be reduced.

  ADVANTAGE OF THE INVENTION According to this invention, while improving the rigidity of a shaving cutter, the gear shaving processing apparatus which prevented the deterioration of the processing precision by biting of a chip with an appropriate amount of cutting oil can be provided.

  Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a configuration diagram showing an outline of the configuration of a gear shaving apparatus according to a first embodiment of the present invention, FIG. 2 is a partially enlarged perspective view of a shaving cutter and a workpiece, and FIG. FIG. 4 is an exploded perspective view of the shaving cutter, FIG. 5 is a partial side view of the shaving cutter and the workpiece, and FIG. 6 is formed on the cutter shaft outer cylinder of the shaving cutter. It is an expanded view which shows the arrangement | sequence of the made slit.

  First, the configuration will be described.

  As shown in FIG. 1, a gear shaving apparatus 1 according to a first embodiment of the present invention includes an apparatus main body 11, a base 12 that supports the apparatus main body 11, and a gear shaving apparatus 1. The workpiece shaft 13 for rotating the workpiece W to be processed, the substrate 14 for supporting the workpiece shaft 13, the substrate inclined portion 15 for inclining the substrate 14, the shaving cutter 16, and the shaving cutter 16 are rotatably supported. A control shaft for controlling the respective parts of the gear shaving apparatus 1, the cutter shaft section 17 that rotates the cutter shaft section 17 in the azimuth direction, the lift section 19 that lifts and lowers the cutter shaft section 17. 20.

The apparatus main body 11 includes a casing supported by a base 12 provided at a place where the gear shaving apparatus 1 is installed. The apparatus main body 11 accommodates the control block 20 therein and supports the elevating unit 19. The elevating part 19 is provided with an elevating mechanism (not shown) inside, and elevates the cutter shaft part 17 according to the processing conditions of the workpiece W.
The work shaft portion 13 includes holding mechanisms 13a and 13b provided on the base 14 so as to be movable in the axial direction. The holding mechanisms 13a and 13b hold both side surfaces of the work W, and a work shaft (not shown) in the holding mechanisms 13a and 13b rotates. That is, the workpiece W held on the workpiece shaft portion 13 rotates with the workpiece shaft.

The base inclination part 15 is rotated in the EL direction around a rotation shaft (not shown) according to the processing conditions of the workpiece W, thereby inclining the base 14.
The cutter rotating portion 18 rotates the cutter shaft portion 17 in the AZ direction around a rotating shaft (not shown) according to the processing conditions of the workpiece W. Since these parts are configured in the same manner as known ones, further detailed description is omitted.

  As shown in FIGS. 1 and 2, the shaving cutter 16 is supported by the cutter shaft 17 so that the axis CL and the axis of the cutter shaft 17 coincide with each other, and the upper part of the work W is engaged with the work W. Arranged on the side. The workpiece W is supported by the workpiece shaft portion 13 so that the axis line WL and the axis line of the workpiece shaft portion 13 coincide with each other. The axis line CL of the cutter shaft part 17 and the axis line WL of the work shaft part 13 are substantially parallel but intersect and mesh with each other at a predetermined intersection angle θ. Therefore, when the work shaft and the cutter shaft are rotated simultaneously, the shaving cutter 16 and the work W are caused to slide relative to each other, and the tooth surface of each tooth tip portion of the work W is cut.

  The shaving cutter 16 is controlled to rotate in the AZ direction by the cutter rotating unit 18 and to move up and down in the Z-axis direction by the elevating unit 19 so as to cut the tooth surface of each tooth tip portion of the workpiece W. ing.

  As shown in FIGS. 3 and 4, the shaving cutter 16 includes a shaving cutter main body 31, a cutter shaft inner cylinder 32, a cutter shaft outer cylinder 33, and a key for fixing the shaving cutter main body 31 and the cutter shaft outer cylinder 33. 34.

  The shaving cutter main body 31 includes a disc-shaped main body portion 35 and a plurality of teeth 36 that are formed to protrude on the outer circumference of the main body portion 35. A central hole 35a extending in the axial direction and penetrating therethrough is formed in the central portion. The cutter shaft outer cylinder 33 is inserted into the center hole 35a.

  Each tooth portion 36 includes a tooth tip portion 36a, a tooth surface portion 36b, and a tooth bottom portion 36c, and the tooth surface portion 36b has four rows of serration grooves 36s1, 36s2, 36s3, 36s4 in the toothpaste direction. Is formed. A blade of a shaving cutter is formed on the tooth surface portion 36b by the serration grooves 36s1 to 36s4, and the tooth surface of the workpiece W is cut by the blade.

  Further, the main body portion 35 is arranged in four rows spaced apart in the axial direction so that each tooth portion 36 opens at the center hole 35a and each tooth bottom portion 36c of the serration grooves 36s1 to 36s4. Four through holes 35k1, 35k2, 35k3, and 35k4 formed at the same angle toward the center hole 35a are formed.

  The main body portion 35 is formed with a plurality of communication grooves 35r extending in the axial direction on an inner wall portion 35b surrounding the center hole 35a, and the opening portions of the through holes 35k1 to 35k4 are communicated. That is, the through holes 35k1 to 35k4 are opened by the communication groove 35r. Further, the main body portion 35 is formed with a key groove 35k extending in the axial direction on the inner wall portion 35b, and the key 34 is inserted therein.

  The cutter shaft inner cylinder 32 includes a cylinder part 37 and a flange part 38 formed integrally with the cylinder part 37, and cutting oil is supplied to the cylinder part 37 and the flange part 38 in the axial direction. An axial oil passage 39 is formed. Cutting oil is supplied to the axial oil passage 39 via the cutter shaft portion 17.

In the cylindrical portion 37 of the cutter shaft inner cylinder 32, four rows are arranged on the same radiation as the rows of the axial oil passages 39 and the through holes 35k1 to 35k4. Four radial oil passages 37 h 1, 37 h 2, 37 h 3, and 37 h 4 that open to the peripheral surface at the radial outer end and discharge the cutting oil from the axial oil passage 39 are formed.
As shown in FIG. 5, the radial oil passages 37h1 to 37h4 are open toward the workpiece W at the peripheral surface of the radial outer end.

  The cutter shaft inner cylinder 32 is connected to the cutter shaft inner cylinder support portion 17a of the cutter shaft portion 17 by a flange portion 38 and is stationary.

  The cutter shaft outer cylinder 33 includes a slit portion 41 formed in a cylindrical shape and a support portion 42, and the cutter shaft outer tube support portion 17 b is rotatable on the support portion 42 via a bearing 43. It is supported. The slit shaft 41 of the cutter shaft outer cylinder 33 is formed with a cutter shaft inner cylinder accommodating hole 41b and a key groove 41c that are opened at the end in the axial direction. A slight gap is formed in the cutter shaft inner cylinder accommodating hole 41b. The cutter shaft inner cylinder 32 is inserted. A key 34 is inserted into the keyway 41c.

  Further, as shown in FIG. 6, four rows of A, B, C, and D rows are arranged in the slit portion 41 of the cutter shaft outer cylinder 33 on the same radiation as the rows of the through holes 35k1 to 35k4. A plurality of slits 41a are formed in each row so as to be spaced apart in the circumferential direction.

The length L ₁ of the rotating direction of each slit 41a, as shown in FIG. 5, is formed to connect the communicating groove 35r close. That, L ₁ is has the same length and circumferential interval between Kakurendorimizo 35r.

  As shown in FIGS. 3 and 5, each slit 41 a opens to the cutter shaft inner cylinder accommodating hole 41 b at the radial inner end, opens to the circumferential surface at the radial outer end, and the radial direction of the cutter shaft inner cylinder 32. The cutting oil flowing from the oil passages 37h1 to 37h4 is circulated in the communication groove 35r of the main body portion 35.

Each slit 41a, as shown in FIG. 6, the two A rows and B columns adjacent the overlap in the circumferential direction by a distance L ₂ from one another. That is, the slits 41a of the odd rows A and C and the even rows B and D are staggered from each other.

  As shown in FIGS. 3 and 4, in the shaving cutter 16, the cutter shaft outer cylinder 33 is inserted into the center hole 35 a of the shaving cutter main body 31, and the shaving cutter main body 31 and the cutter shaft outer cylinder 33 are fixed by the key 34. The cylinder portion 37 of the cutter shaft inner cylinder 32 is accommodated in the cutter shaft inner cylinder accommodation hole 41 b of the cutter shaft outer cylinder 33. A spacer 49 is interposed between the shaving cutter main body 31 and the flange portion 38 of the cutter shaft inner cylinder 32 to restrict movement of the shaving cutter main body 31 in the axial direction, and within the communication groove 35r of the shaving cutter main body 31. The leakage of the cutting oil is suppressed.

  As shown in FIG. 1, the control block 20 is housed in the apparatus main body 11, and includes a cutter shaft driving unit 21 that rotates the shaving cutter 16, a work shaft driving unit 22 that rotates the workpiece W, and a workpiece W. The cutting oil supply unit 23 that supplies the cutting oil S to the machining part, the control unit 24 that controls each part of the control block 20, information on the workpiece W such as the shape and structure of the workpiece W, machining conditions such as the rotation speed, etc. The setting unit 25 that stores the various setting values and the power supply unit 26 that supplies power to each unit of the control block 20 are configured.

  The control unit 24 includes a CPU (Central Processing Unit) (not shown), a ROM (Read Only Memory) that stores processing programs, a RAM (Random Access Memory) that temporarily stores data, an A / D converter, a buffer, and the like. The input interface circuit includes an output interface circuit including a drive circuit and the like.

  In the control unit 24, the rotation speed (rpm) of the cutter shaft of the cutter shaft driving unit 21 and the rotation speed (rpm) of the work shaft of the work shaft driving unit 22 are controlled, and a predetermined amount is set between the shaving cutter 16 and the work W. Relative sliding speed (m / sec) is generated. Since the control block 20 and each of these parts are configured in the same manner as known ones, further detailed description is omitted.

  Next, a processing method using the gear shaving processing apparatus 1 according to the first embodiment of the present invention will be described.

  FIG. 7 is a diagram of the gear shaving apparatus 1 according to the first embodiment of the present invention. FIG. 7A is a diagram in which the tooth surface portion 36b of the shaving cutter 16 and the tooth surface portion of the workpiece W are in contact with each other. FIG. 7B is a schematic diagram showing a state where the radial oil passage 37h1 of the cutter shaft inner cylinder 32 and the slit 41a of the cutter shaft outer cylinder 33 communicate with each other. is there. FIG. 8 is a partial enlarged cross-sectional view of the shaving cutter 16 and shows the state of distribution of the cutting oil that circulates inside. FIG. 9 is a graph showing the relationship between the cutting state and cutting oil supply amount for each cutting tooth to be cut.

  The shaving process is performed in the order of a work W preparation step, a work step for cutting the work W, and a removal step for removing the processed work W.

  As shown in FIG. 1 and FIG. 2, in the preparation step, first, the workpiece W is sandwiched between the both side surfaces by the holding mechanism 13 a and the holding mechanism 13 b of the workpiece shaft portion 13, and is placed in the gear shaving apparatus 1. Set. At this time, the inclination angle of the base 14 is set by the base inclined portion 15 according to the shape of the workpiece W. Next, the shaving cutter 16 selected according to the shape of the workpiece W is set on the cutter shaft portion 17. In the case of the dedicated shaving processing device 1 corresponding to the shape of the workpiece W, since the shaving cutter 16 corresponding to the workpiece W is already provided, selection and setting of the shaving cutter 16 are omitted.

  Next, the set shaving cutter 16 is set to a predetermined azimuth angle by the cutter rotating unit 18, and the shaving cutter 16 and the work W are lowered by the elevating unit 19 to engage with each other. At this time, the axis line CL of the cutter shaft part 17 and the axis line WL of the work shaft part 13 intersect with each other at a predetermined crossing angle θ corresponding to the cutting of the work W, and the cutter shaft part 17 and the work shaft part 13 rotate. It is set so that a predetermined relative sliding speed (m / sec) is generated.

  In the machining step, the cutter shaft portion 17 and the workpiece shaft portion 13 are rotated at a predetermined rotational speed (rpm) by the control unit 24 of the control block 20, and the tooth surface of the workpiece W is cut by the shaving cutter 16. At this time, as shown in FIG. 7A, the tooth surface portion 36b of the shaving cutter 16 and the tooth surface portion Wa of the work W are brought into pressure contact with a predetermined pressing force (MPa), whereby the tooth surface portion Wa of the work W is shaved. . The tooth portion 36 shown in the center portion of the shaving cutter 16 shown in FIG. 7A indicates that cutting is in progress, and the tooth portion 36 on the starting point side of the arrow in the rotational direction of the shaving cutter 16 indicated by an arrow is at the start of cutting. Yes, the tooth portion 36 on the tip side of the arrow indicates that the cutting is finished.

  As shown in FIG. 7B, at the start of cutting, the radial oil passage 37h1 of the cutter shaft inner cylinder 32 and the slit 41a of the cutter shaft outer cylinder 33 start to communicate, and at this time, the cutter shaft inner cylinder The cutting oil in the 32 axial oil passages 39 flows into the slit 41a from the radial oil passage 37h1. At the time of cutting, the radial oil passage 37h1 and the slit 41a of the cutter shaft outer cylinder 33 communicate with each other, so that the cutting oil in the axial oil passage 39 passes from the radial oil passage 37h1 into the slit 41a. Inflow is maintained. At the end of cutting, communication between the radial oil passage 37h1 of the cutter shaft inner cylinder 32 and the slit 41a of the cutter shaft outer cylinder 33 is completed, and a slit is formed from the radial oil path 37h1 of the cutting oil in the axial oil passage 39. Inflow into 41a stops.

  Such supply start and stop of the cutting oil are performed for each slit 41a. In the cutter shaft inner cylinder 32, radial oil passages 37h1 to 37h4 are formed in a line in the axial direction, and slits 41a of the cutter shaft outer cylinder 33 are arranged in four rows of A row, B row, C row, and D row. Since the rows A and B, the rows C and D are arranged in a staggered manner, the supply start and stop of cutting oil are performed with the same synchronization in the rows A and C. And D columns are performed with the same synchronization. As a result, since any one of the slits 41a communicates with the radial oil passages 37h1 to 37h4, it is possible to prevent the cutting oil from being supplied at all.

  As shown in FIG. 8, the supply of such cutting oil is supplied to the cutting portion of the workpiece W by the circulation of the cutting oil in the direction of the arrow, and the chips generated during the cutting are removed together with the cutting oil to the outside of the workpiece W. It is discharged and prevented from being bitten by the shaving cutter 16. As a result, deterioration of processing accuracy due to biting is prevented.

  That is, the cutting oil flowing into the axial oil passage 39 of the cutter shaft inner cylinder 32 by the cutting oil supply unit 23 shown in FIG. 1 circulates in the direction of the arrow, and the radial oil passage 37h1 communicates with the slit 41a. 37h3, further flows through the slit 41a, and flows into the communication groove 35r of the shaving cutter body 31. The cutting oil flowing into the communication groove 35r flows through the through holes 35k1 to 35k4, and is discharged from each tooth bottom portion to the cutting portion along the serration grooves 36s1 to 36s4. Since the cutting oil once flows into the communication groove 35r, it circulates in the through holes 35k1 to 35k4 regardless of the communication state between the radial oil passages 37h1 to 37h4 and the slit 41a. In this way, new cutting oil is constantly discharged from the through holes 35k1 to 35k4 toward the cutting portion, and chips are discharged from the cutting portion together with the cutting oil.

As shown in FIG. 9, the cutting oil reaches the required amount of cutting oil before the start of cutting, and the required amount of cutting oil is maintained in a constant state during cutting, and the supply thereof is quickly stopped upon completion of cutting.
Accordingly, the cutting oil in the axial oil passage 39 is supplied to the cutting portion in a state where the workpiece W is being cut, so that the cutting oil is not supplied to the tooth portion of the other workpiece W that has not been cut. The amount of cutting oil is reduced.

The amount of cutting oil required for the cutting process is appropriately selected depending on the specifications of the workpiece W and the processing conditions of the gear shaving apparatus 1 according to the present embodiment.
In the machining step, when all the teeth of the workpiece W have been cut, the control unit 24 of the control block 20 stops the rotation of the cutter shaft unit 17 and the workpiece shaft unit 13.

  In the removing step, after the rotation of the cutter shaft portion 17 and the workpiece shaft portion 13 is stopped, the holding of the workpiece W by the holding mechanism 13a and the holding mechanism 13b of the workpiece shaft portion 13 is released, and the workpiece W is a gear shaving processing device. Removed from 1.

  Since the gear shaving apparatus 1 according to the present embodiment is configured as described above, the following effects can be obtained.

  That is, the gear shaving processing apparatus 1 according to the present embodiment is disposed at the center of the shaving cutter body 31 having the center hole 35a, the center hole 35a, and the through holes 35k1 to 35k4, and at the center of the shaving cutter body 31. A plurality of rows are arranged on the same radiation as the rows of the axial oil passages 39 and the through holes 35k1 to 35k4 formed extending in the axial direction, and open to the axial oil passages 39 at the radial inner ends of the rows. The cutter shaft inner cylinder 32 having radial oil passages 37h1 to 37h4 opened to the circumferential surface at the outer radial end, and located between the shaving cutter main body 31 and the cutter shaft inner cylinder 32, and a row of through holes 35k1 to 35k4 A cutter shaft outer cylinder 33 having a plurality of slits 41a arranged in a plurality of rows on the same radiation and spaced apart in the circumferential direction in each row. It is more configuration.

  Further, the shaving cutter body 31 is formed to extend in the axial direction on the inner wall portion 35b surrounding the central hole 35a, and has a communication groove 35r that communicates the opening portions of the through holes 35k1 to 35k4. 35k4 is configured to open at the communication groove 35r.

As a result, in the gear shaving apparatus 1 according to the present embodiment, the through holes 35k1 to 35k4 are formed so as to open at the tooth bottom portions 36c of the serration grooves 36s1 to 36s4, so that the serration grooves 36s1 of the shaving cutter 16 are formed. When the through holes 35s1 to 35k4 function as the clearance of the groove processing tool when the 36s4 is processed with the groove processing tool, it is not necessary to separately form the escape hole in the tooth trace direction.
Further, since no relief hole is formed in the tooth bottom portion 36c, the tooth thickness of each tooth root portion is larger than that of the conventional one, and the rigidity of the tooth root portion is increased as compared with the conventional one.

  Further, since the cutting oil is discharged directly from the opening portions of the through holes 35k1 to 35k4 toward the cutting portion of the workpiece W, chips generated during the cutting are quickly discharged together with the cutting oil to the outside of the workpiece W, Biting into the shaving cutter 16 is prevented. As a result, deterioration of processing accuracy due to biting is prevented.

  Further, the cutting oil flows into the communication groove 35r of the shaving cutter main body 31 only from the radial oil passages 37h1 to 37h4 communicating with the slit 41a, so that the cutting oil reaches the necessary amount of cutting oil before the start of cutting, During cutting, the required amount of cutting oil is maintained in a constant state, and the supply is promptly stopped upon completion of cutting. Accordingly, the cutting oil in the axial oil passage 39 is supplied to the cutting portion in a state where the workpiece W is being cut, so that the cutting oil is not supplied to the tooth portion of the other workpiece W that has not been cut. The amount of cutting oil can be reduced, and the cutting oil required for cutting can be reduced.

  In the gear shaving processing apparatus 1 according to the present embodiment, the case where the communication groove 35r is formed in the main body portion 35 of the shaving cutter main body 31 has been described. However, in the gear shaving processing apparatus according to the present invention, each slit The shaving cutter body may be configured to communicate directly with the plurality of through holes of the shaving cutter body without passing through the communication groove.

  In the gear shaving processing apparatus 1 according to the present embodiment, the case where four rows of serration grooves 36s1 to 36s4 are formed in each tooth portion 36 of the shaving cutter body 31 has been described. In the shaving apparatus, a plurality of serration grooves other than four rows may be formed in the shaving cutter body.

  FIG. 10 is a cross-sectional view of the shaving cutter of the shaving apparatus 1 according to the first embodiment of the present invention, and shows a case where a large number of serration grooves are formed. FIG. 11 is a development view showing the arrangement of the slits of the shaving cutter in which a large number of serration grooves are formed. FIG. 11A shows a state where the slits are arranged substantially parallel to the axial direction, and FIG. The state which inclined and arrange | positioned to the axial direction is shown. FIG. 12 is a development view showing the arrangement of the slits of the shaving cutter in which a large number of serration grooves are formed, FIG. 12 (a) shows a state of being arranged in a mountain shape in the axial direction, and FIG. 12 (b) It is an expanded view at the time of arrange | positioning at zigzag form in an axial direction. FIG. 13 is a partial enlarged cross-sectional view of a shaving cutter in which a large number of serration grooves are formed.

As shown in FIG. 10, in the gear shaving processing apparatus 1 according to the present embodiment, for example, nine rows of serration grooves 36 s 1, 36 s 2, 36 s 3, 36 s 4, 36 s 5, 36 s 6 are formed in each tooth portion 36 of the shaving cutter body 31. , 36s7, 36s8, and 36s9 may be formed. In this case, as shown in FIG. 11 (a), the slit 41a is arranged in the axial direction, and nine rows A, B, C, D, E, F, G, H, and I are arranged substantially parallel to the axial direction. Alternatively, as shown in FIG. 11B, the slits 41a may be arranged with the nine rows A, B, C, D, E, F, G, H, and I inclined in the axial direction in the axial direction. Good. Further, as shown in FIG. 12A, the slits 41a may be inclined and arranged in a mountain-shaped row, and as shown in FIG. 12B, the slits 41a are arranged in the axial direction. it may be arranged in a zigzag manner so as to have an overlap portion of the distance L _3.

  In the gear shaving processing apparatus 1 configured as described above, as shown in FIG. 13, the cutting oil circulates in the direction of the arrow and is supplied to the cutting portion of the workpiece W, and the chips generated during the cutting are the cutting oil. At the same time, it is discharged out of the workpiece W and prevented from being bitten by the shaving cutter 16. As a result, deterioration of processing accuracy due to biting is prevented.

  That is, the cutting oil flowing into the axial oil passage 39 of the cutter shaft inner cylinder 32 by the cutting oil supply unit 23 shown in FIG. 1 circulates in the direction of the arrow, and the radial oil passage 37h1 communicates with the slit 41a. , 37h3, 37h5, 37h7, 37h9, further circulates in the slit 41a, and flows into the communication groove 35r of the shaving cutter body 31. The cutting oil that has flowed into the communication groove 35r flows through the through holes 35k1, 35k2, 35k3, 35k4, 35k5, 35k6, 35k7, 35k8, and 35k9, and is supplied from each tooth bottom to the cutting portion through the serration grooves 36s1 to 36s9. Is done. Since the cutting oil once flows into the communication groove 35r, the radial oil passages 37h1, 37h2, 37h3, 37h4, 37h5, 37k6, 37h7, 37h8, 37h9 and the through holes 35k1 to 35k9 regardless of the communication state between the slit 41a. Circulate inside.

  The cutting oil reaches the required amount of cutting oil before the start of cutting, and the required amount of cutting oil is maintained in a constant state during cutting, and the supply thereof is promptly stopped upon completion of cutting. Accordingly, the cutting oil in the axial oil passage 39 is supplied to the cutting portion in a state where the workpiece W is being cut, so that the cutting oil is not supplied to the tooth portion of the other workpiece W that has not been cut. The amount of cutting oil is reduced.

(Second Embodiment)
FIG. 14 is a sectional view of the shaving cutter 56 of the gear shaving apparatus 10 according to the second embodiment of the present invention, and FIG. 14 (a) is a partial sectional view of the shaving cutter. FIG. 14B is a partial cross-sectional view of the shaving cutter showing a part of FIG. FIG. 15 is a partial enlarged cross-sectional view of the shaving cutter 56, and shows the state of flow of the cutting oil that circulates inside.

  In the gear shaving apparatus 10 according to the second embodiment, the shaving cutter body 31 and the cutter shaft inner cylinder 32 in the gear shaving apparatus 1 according to the first embodiment are fixed. Although the point is different, the other structure is comprised similarly. Therefore, the same configuration will be described using the same reference numerals as those of the first embodiment shown in FIGS. 1 to 13, and only differences will be described in detail.

First, the configuration will be described.
As shown in FIG. 1, the gear shaving apparatus 10 according to the second embodiment of the present invention is similar to the gear shaving apparatus 1 according to the first embodiment. A base 12 that supports the main body 11, a work shaft 13 that rotates the work W processed by the gear shaving processing device 1, a base 14 that supports the work shaft 13, and a base tilt that tilts the base 14. Part 15, shaving cutter 56, cutter shaft part 17 that rotatably supports shaving cutter 56, cutter rotating part 18 that rotates cutter shaft part 17 in the azimuth direction, and elevation that moves cutter shaft part 17 up and down A part 19 and a control block 20 for controlling each part of the gear shaving apparatus 10 are configured.

  As shown in FIG. 14A, the shaving cutter 56 includes a shaving cutter main body 61, a cutter shaft inner cylinder 62 formed integrally with the shaving cutter main body 61, and a cutter shaft outer cylinder 63. ing.

  The shaving cutter main body 61 includes a disk-shaped main body portion 65 and a plurality of tooth portions 66 formed to protrude on the outer circumference of the main body portion 65. A central hole 65a extending in the axial direction is formed at the center. The cutter shaft outer cylinder 63 is inserted into the center hole 65a.

  Each tooth portion 66 includes a tooth tip portion 66a, a tooth surface portion 66b, and a tooth bottom portion 66c. The tooth surface portion 66b has nine rows of serration grooves 66s1, 66s2, 66s3, 66s4 in the toothpaste direction. , 66s5, 66s6, 66s7, 66s8, 66s9 are formed. The serration grooves 66s1 to 66s9 form a shaving cutter blade on the tooth surface 66b, and the tooth surface of the workpiece W is cut by the blade.

  Further, the main body portion 65 is arranged for each tooth portion 66 in nine rows spaced in the axial direction so as to open at the center hole 65a and each tooth bottom portion 66c of the serration grooves 66s1 to 66s9, and in each row in the circumferential direction. Nine through-holes 65k1, 65k2, 65k3, 65k4, 65k5, 65k6, 65k7, 65k8, and 65k9 formed at the same angle toward the center hole 65a are formed. A projecting portion 65t having a center hole 65a is formed at the open end portion 65f of the main body portion 65, and is rotatably supported by the cutter shaft outer cylinder 63 via a bearing 72a.

  The cutter shaft inner cylinder 62 includes a cylindrical portion 67 and a connecting portion 68 that integrally connects the cylindrical portion 67 and the shaving cutter main body 61. The cylindrical portion 67 and the connecting portion 68 include an axial line. An axial oil passage 69 for passing cutting oil in the direction is formed. Cutting oil is supplied to the axial oil passage 69 via the cutter shaft portion 17.

As shown in FIG. 14 (b), in the cylindrical portion 67 of the cutter shaft inner cylinder 62, nine rows are arranged on the same radiation as the rows of the axial oil passages 69 and the through holes 65k1 to 65k9. Nine radial oil passages 67h1, 67h2, 67h3, 67h4, 67h5 that open to the axial oil passage 69 at the radial inner end, open to the peripheral surface at the radial outer end, and discharge the cutting oil from the axial oil passage 69. , 67h6, 67h7, 67h8, 67h9 are formed.
The radial oil passages 67h1 to 67h9 have the same number of rows as the plurality of tooth portions 66, and are formed so as to penetrate at an equal angle in the circumferential direction in each row, like the through holes 65k1 to 65k9. .
The cutter shaft inner cylinder 62 is rotatably supported by the cutter shaft inner cylinder support portion 17a of the cutter shaft portion 17 on the outer peripheral surface 68a of the connecting portion 68 via a bearing 17c.

  The cutter shaft outer cylinder 63 includes a slit portion 71 formed in a cylindrical shape, a support portion 72, and a flange portion 73. The support portion 72 rotates the shaving cutter main body 61 via a bearing 72a. While supporting freely, it is connected with the cutter shaft outer cylinder support part 17b by the flange part 73, and is stationary.

The slit portion 71 of the cutter shaft outer cylinder 63 is formed with a cutter shaft inner cylinder accommodation hole 71b that opens at the end in the axial direction, and the cutter shaft inner cylinder accommodation hole 71b has a slight gap. The cutter shaft inner cylinder 62 is inserted.
The slit portion 71 of the cutter shaft outer cylinder 63 is formed with a plurality of slits 71a arranged on the same radiation as the rows of the through holes 65k1 to 65k9 and spaced apart in the circumferential direction. ing.

The length of each slit 71a in the rotation direction is a length corresponding to the tooth portion 66 adjacent to the shaving cutter main body 61, that is, on the circumference of the main body portion 65, and adjacent to the tooth portion 66 and the tooth portion 66. It is formed with the same length as the circumferential interval between the other tooth portions 66.
Each slit 71a opens to the cutter shaft inner cylinder accommodating hole 71b at the radial inner end and opens to the peripheral surface at the radial outer end, and the cutting flowed in from the radial oil passages 67h1 to 67h9 of the cutter shaft inner cylinder 62. Oil is allowed to flow into the through holes 65k1 to 65k9 of the main body 65.

  As shown in FIG. 14A, in the shaving cutter 56, the cutter shaft outer cylinder 63 is inserted into the center hole 65a of the shaving cutter main body 61, the shaving cutter main body 61 and the cutter shaft inner cylinder 62 are connected, and the cutter shaft The shaving cutter main body 61 and the cutter shaft inner cylinder 62 are both rotated by the portion 17.

  In the gear shaving processing apparatus 10 configured as described above, as shown in FIG. 15, the cutting oil circulates in the direction of the arrow and is supplied to the cutting portion of the workpiece W, and the chips generated during the cutting are the cutting oil. At the same time, it is discharged out of the workpiece W and prevented from being bitten by the shaving cutter 16. As a result, deterioration of processing accuracy due to biting is prevented.

  That is, the cutting oil that has flowed into the axial oil passage 69 of the cutter shaft inner cylinder 62 by the cutting oil supply section 23 flows in the arrow direction and flows into the radial oil passages 67h1 to 67h9 communicating with the slit 71a. Then, it circulates in the slit 71a, circulates in the through holes 65k1 to 65k9 of the shaving cutter main body 61, and is supplied from each tooth bottom portion to the cutting portion through the serration grooves 66s1 to 66s9.

  The cutting oil reaches the required amount of cutting oil before the start of cutting, as in the case of the supply of the cutting oil in the first embodiment, and the required amount of cutting oil is maintained in a constant state during cutting, The supply stops immediately. Therefore, the cutting oil in the axial oil passage 69 is supplied to the cutting portion in a state where the workpiece W is being cut, so that the cutting oil is not supplied to the tooth portion of the other workpiece W that has not been cut. The amount of cutting oil is reduced.

Since the gear shaving apparatus 10 according to the present embodiment is configured as described above, the following effects can be obtained.
That is, the gear shaving processing apparatus 10 according to the present embodiment is disposed at the center of the shaving cutter body 61 having the center hole 65a, the center hole 65a, and the through holes 65k1 to 65k9, and at the center of the shaving cutter body 61. A plurality of rows are arranged on the same radiation as the rows of the axial oil passages 69 and the through holes 65k1 to 65k9 formed extending in the axial direction, and open to the axial oil passages 69 at the radial inner ends of the respective rows. The cutter shaft inner cylinder 62 having radial oil passages 67h1 to 67h9 opened to the peripheral surface at the outer radial end, and located between the shaving cutter main body 61 and the cutter shaft inner cylinder 62, and a row of through holes 65k1 to 65k9 And a cutter shaft outer cylinder 63 having a plurality of slits 71a arranged in a plurality of rows on the same radiation.

  As a result, in the gear shaving apparatus 10 according to the present embodiment, the through holes 65k1 to 65k9 are formed so as to open at the tooth bottom portions 66c of the serration grooves 66s1 to 66s9, so that the serration groove 66s1 of the shaving cutter 16 is formed. Through holes 65k1 to 65k9 function as reliefs for the groove machining tool when machining 66s9 to the groove machining tool, it is not necessary to separately form a relief hole in the tooth trace direction. Further, since no relief hole is formed in the tooth bottom portion 66c, the tooth thickness of each tooth root portion is larger than that of the conventional one, and the rigidity of the tooth root portion is increased as compared with the conventional one.

  Further, since the cutting oil is discharged directly from the opening portions of the through holes 65k1 to 65k9 toward the cutting portion of the workpiece W, the chips generated during the cutting are quickly discharged together with the cutting oil to the outside of the workpiece W, Biting into the shaving cutter 16 is prevented. As a result, deterioration of processing accuracy due to biting is prevented.

  Further, the cutting oil flows into the through holes 65k1 to 65k9 of the shaving cutter main body 31 only from the radial oil passages 67h1 to 67h4 communicating with the slit 71a, so that the cutting oil reaches the necessary amount of cutting oil before the start of cutting. During cutting, the required amount of cutting oil is maintained in a constant state, and the supply is quickly stopped upon completion of cutting. Therefore, the cutting oil in the axial oil passage 69 is supplied to the cutting portion in a state where the workpiece W is being cut, so that the cutting oil is not supplied to the tooth portion of the other workpiece W that has not been cut. The amount of cutting oil can be reduced, and the cutting oil required for cutting can be reduced.

  As described above, the gear shaving processing apparatus according to the present invention increases the rigidity of the shaving cutter and prevents the deterioration of the processing accuracy due to the biting of chips with an appropriate amount of cutting oil. An apparatus can be provided. As a result, it is useful for gear shaving devices in general.

It is a block diagram which shows the outline of a structure of the gear shaving processing apparatus which concerns on the 1st Embodiment of this invention. It is a partial expansion perspective view of the shaving cutter and workpiece of the shaving processing apparatus concerning a 1st embodiment of the present invention. It is sectional drawing of the shaving cutter of the shaving processing apparatus which concerns on the 1st Embodiment of this invention. It is a disassembled perspective view of the shaving cutter of the shaving processing apparatus which concerns on the 1st Embodiment of this invention. It is a partial side view of a shaving cutter and a workpiece of the shaving processing apparatus according to the first embodiment of the present invention. It is an expanded view which shows the arrangement | sequence of the slit formed in the cutter shaft outer cylinder of the shaving cutter of the shaving processing apparatus which concerns on the 1st Embodiment of this invention. It is a figure of the gear shaving processing apparatus which concerns on the 1st Embodiment of this invention, Fig.7 (a) shows the state which the tooth-surface part of the shaving cutter and the tooth-surface part of the workpiece | work W contact and process. FIG. 7B is a schematic diagram showing a state where the radial oil passage of the cutter shaft inner cylinder and the slit of the cutter shaft outer cylinder communicate with each other. It is a partial expanded sectional view of the shaving cutter of the shaving processing apparatus which concerns on the 1st Embodiment of this invention, and shows the distribution | circulation state of the cutting oil which distribute | circulates an inside. It is a graph which shows the relationship between the cutting state for every cutting tooth cut in the shaving processing apparatus which concerns on the 1st Embodiment of this invention, and cutting oil supply amount. It is sectional drawing of the shaving cutter of the shaving processing apparatus which concerns on the 1st Embodiment of this invention, and shows the case where many serration grooves are formed. FIG. 11A is a development view showing the arrangement of the slits of the shaving cutter in which a large number of serration grooves are formed in the shaving processing apparatus according to the first embodiment of the present invention, and FIG. 11A is arranged substantially parallel to the axial direction. FIG. 11 (b) shows a state in which it is disposed in an inclined direction in the axial direction. FIG. 12A is a development view showing the arrangement of the slits of the shaving cutter in which a number of serration grooves are formed in the shaving cutter of the shaving processing apparatus according to the first embodiment of the present invention. FIG. FIG. 12B is a development view in the case where they are arranged in a staggered manner in the axial direction. It is the elements on larger scale of the shaving cutter which formed many serration grooves of the shaving processing apparatus which concerns on the 1st Embodiment of this invention. FIG. 14A is a sectional view of a shaving cutter of a gear shaving processing apparatus according to a second embodiment of the present invention, FIG. 14A is a partial sectional view of the shaving cutter, and FIG. It is a fragmentary sectional view of the shaving cutter which shows a part of (a). It is a partial expanded sectional view of the shaving cutter of the shaving processing apparatus which concerns on the 2nd Embodiment of this invention, and shows the distribution | circulation state of the cutting oil which distribute | circulates an inside.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 10 Shaving processing apparatus 11 Apparatus main body part 13 Work shaft part 16, 56 Shaving cutter 17 Cutter shaft part 31, 61 Shaving cutter main body 31a Center hole 32, 62 Cutter shaft inner cylinder 33, 63 Cutter shaft outer cylinder 35, 65 Main body Part 35k1, 35k2, 35k3, 35k4, 35k5, 35k6, 35k7, 35k8, 35k9, 65k1, 65k2, 65k3, 65k4, 65k5, 65k6, 65k7, 65k8, 65k9 Through hole 35a Central hole 35r Communication groove 36s36, 36s 36s4, 36s5, 36s6, 36s7, 36s8, 36s9, 66s1, 66s2, 66s3, 66s4, 66s5, 66s6, 66s7, 66s8, 66s9 Serration groove 36, 66 tooth part 36a, 66a tooth tip part 36b, 6b Tooth surface portion 36c, 66c Tooth bottom portion 37, 67 Tube portion 37h1, 37h2, 37h3, 37h4, 37h5, 37k6, 37h7, 37h8, 37h9, 67h1, 67h2, 67h3, 67h4, 67h5, 67h6, 67h7, 67h8, 67h9 Oil passage 39, 69 Axial oil passage 41, 71 Slit portion 41a, 71a Slit 41b, 61a, 71b Cutter shaft inner cylinder accommodation hole 65a Center hole 68 Connection portion

Claims (4)

A central hole formed extending in the axial direction in the central portion and a plurality of rows spaced in the axial direction so as to open at the tooth bottom of the serration groove and the central hole are arranged at equal angles in the circumferential direction in each row A shaving cutter body having a plurality of through holes formed toward the center hole;
A plurality of rows are arranged on the same radiation as the rows of the axial oil passages and the through holes that are arranged in the central portion of the shaving cutter main body and extend in the axial direction in the central portion. A cutter shaft inner cylinder having a plurality of radial oil passages opened to the axial oil passage at the radial inner end and opened to the circumferential surface at the radial outer end;
A plurality of slits formed between the shaving cutter main body and the cutter shaft inner cylinder, arranged in a plurality of rows on the same radiation as the rows of the through holes, and separated in the circumferential direction in each row. A gear shaving processing apparatus, comprising: a cutter shaft outer cylinder, wherein the cutter shaft inner cylinder or the cutter shaft outer cylinder is rotated together with the shaving cutter body.   2. The gear shaving apparatus according to claim 1, wherein among the slits of the cutter shaft outer cylinder, adjacent two rows of slits are arranged in a staggered manner.   The shaving cutter main body is formed to extend in an axial direction on an inner wall portion surrounding the central hole of the shaving cutter main body, and has a communication groove that communicates with an opening portion of the through hole. The gear shaving apparatus according to claim 1 or 2, wherein the communication groove is opened.   The shaving cutter main body is fixed to the cutter shaft outer cylinder so that the slits of the cutter shaft outer cylinder communicate with the through holes of the shaving cutter main body, and the cutter shaft outer cylinder and the shaving cutter main body And the cutter shaft inner cylinder is stationary with the opening of the radial oil passage directed toward the workpiece. The gear shaving processing apparatus according to claim 1.

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