WO2010073944A1 - 内歯車研削盤及び樽形ねじ状工具のドレッシング方法 - Google Patents
内歯車研削盤及び樽形ねじ状工具のドレッシング方法 Download PDFInfo
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- WO2010073944A1 WO2010073944A1 PCT/JP2009/070955 JP2009070955W WO2010073944A1 WO 2010073944 A1 WO2010073944 A1 WO 2010073944A1 JP 2009070955 W JP2009070955 W JP 2009070955W WO 2010073944 A1 WO2010073944 A1 WO 2010073944A1
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- Prior art keywords
- tool
- dresser
- rotation axis
- shaped
- screw
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
- B24B53/12—Dressing tools; Holders therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F23/00—Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
- B23F23/12—Other devices, e.g. tool holders; Checking devices for controlling workpieces in machines for manufacturing gear teeth
- B23F23/1225—Arrangements of abrasive wheel dressing devices on gear-cutting machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F5/00—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made
- B23F5/02—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by grinding
- B23F5/04—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by grinding the tool being a grinding worm
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
- B24B53/06—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels
- B24B53/075—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels for workpieces having a grooved profile, e.g. gears, splined shafts, threads, worms
Definitions
- the present invention relates to an internal gear grinding machine for grinding an internal gear with a barrel-shaped screw-shaped tool, and more particularly, to an internal gear grinding machine having a dressing function for dressing a barrel-shaped screw-shaped tool and a method for dressing a barrel-shaped screw-shaped tool.
- an internal gear grinding machine having a dressing function for dressing a barrel-shaped screw-shaped tool and a method for dressing a barrel-shaped screw-shaped tool.
- a gear is formed by performing gear cutting processing on a predetermined gear material, and after the processed gear is heat-treated, finishing processing (grinding) for removing distortion or the like due to the heat treatment is performed. Processing).
- various tooth grinding methods using tools such as a WA-based grindstone and a superabrasive (diamond, CBN, etc.) grindstone have been provided.
- the shapes of the tools used for these include an external gear shape, an internal gear shape, a screw (worm) shape, etc., depending on the shape of the gear to be ground.
- Non-Patent Document 1 discloses an internal gear grinding method for grinding an internal gear with a barrel-shaped screw-shaped grinding wheel with high accuracy.
- some gear grinding machines are provided with a dressing device for dressing a worn grindstone with a dresser.
- a dressing device for dressing a barrel-shaped threaded grindstone for grinding an internal gear simply placing this dressing device on the internal gear grinding machine, due to restrictions due to the shape of the internal gear, Since the dressing operation is complicated, there is a risk of increasing the size of the machine.
- the present invention solves the above-mentioned problem, and by simplifying the dressing operation, space saving can be realized, and the internal gear grinding machine and barrel-shaped screw shape that can reduce the size of the machine can be achieved. It aims at providing the dressing method of a tool.
- An internal gear grinding machine for solving the above-mentioned problems is as follows. By engaging and synchronously rotating an internal gear to be machined that can rotate around a workpiece rotation axis and a barrel-shaped screw-shaped tool that can rotate around a tool rotation axis having a predetermined axis crossing angle with the workpiece rotation axis.
- Dressing means for dressing the threaded tool by meshing the threaded tool with a disk-shaped dresser rotatable around a dresser rotation axis;
- the dressing means is Dresser turning means for turning the dresser around a dresser turning axis orthogonal to the dresser rotation axis;
- Tool rotating means for rotating the screw-shaped tool around the tool rotation axis;
- Tool vertical direction moving means for moving the screw-shaped tool in the vertical direction;
- Tool horizontal movement means for moving the screw-shaped tool so as to adjust the distance between the tool rotation axis and the dresser rotation axis;
- Tool lateral movement means for moving the screw-shaped tool in a direction orthogonal to the tool rotation axis direction and the horizontal direction,
- the dresser turning means, the tool rotating means, the tool vertical direction moving means, the tool horizontal direction moving means, and the tool lateral direction moving means are driven according to the shape of the threaded tool. .
- An internal gear grinding machine for solving the above-mentioned problems is as follows. During dressing, the screw-like tool is rotated around the tool rotation axis arranged vertically.
- An internal gear grinding machine for solving the above-mentioned problems is as follows.
- Tool turning means for turning the screw-shaped tool around a tool turning axis orthogonal to the workpiece rotation axis is provided.
- the dressing method of the barrel-shaped screw-shaped tool which concerns on 4th invention which solves the said subject is as follows.
- grinding is performed on the internal gear to be machined that can rotate around the workpiece rotation axis, it is engaged with the workpiece rotation axis in a state in which an axis crossing angle is given.
- a dressing method for dressing the screw-shaped tool by meshing a screw-shaped tool formed in a barrel shape whose diameter gradually decreases toward both ends, and a disk-shaped dresser, While rotating the dresser around a dresser rotation axis and turning around a dresser rotation axis orthogonal to the dresser rotation axis,
- the screw-like tool is rotated around a tool rotation axis, and the vertical direction, the direction for adjusting the distance between the tool rotation axis and the dresser rotation axis, the tool rotation axis direction, and the tool rotation axis and the dresser rotation. It is characterized by being moved in a direction orthogonal to the direction of adjusting the distance between the shafts.
- the dressing method of the barrel-shaped screw-shaped tool which concerns on 5th invention which solves the said subject,
- the dresser is Swiveling around the dresser swivel axis so that the swivel angle around the dresser swivel axis with respect to the axial position of the threaded tool with which the dresser contacts changes in a quadratic curve;
- the threaded tool is: The rotation angle about the tool rotation axis with respect to the axial position of the screw-shaped tool with which the dresser contacts is rotated about the tool rotation axis so as to change linearly;
- the amount of movement in the vertical direction with respect to the axial position of the screw-shaped tool with which the dresser is in contact moves in the vertical direction so as to change linearly,
- the tool rotation is performed so that the amount of movement in the direction of adjusting the distance between the tool rotation axis and the dresser rotation axis with respect to the axial position of the screw-shaped tool with which the dresser contacts changes in a quadr
- the amount of movement in the direction of the tool rotation axis relative to the axial position of the screw-shaped tool with which the dresser is in contact and the direction orthogonal to the direction of adjusting the distance between the tool rotation axis and the dresser rotation axis is a cubic curve. It moves to the direction orthogonal to the direction which adjusts the tool rotating shaft direction and the distance between the said tool rotating shaft and the said dresser rotating shaft so that it may change to (3).
- the entire dressing operation is performed by operating the screw tool and the dresser according to the shape of the screw tool during dressing. Therefore, the space can be saved and the machine can be downsized.
- FIG. The figure which showed the relationship with the Y-axis direction movement amount, (e) is the figure which showed the relationship between the axial direction position of the screw-shaped grindstone which a disk dresser contacts, and the Z-axis direction movement amount of a screw-shaped grindstone.
- a column (tool lateral movement means) 12 is supported on a bed 11 of an internal gear grinding machine 1 so as to be movable in the horizontal X-axis direction.
- a saddle (tool vertical direction moving means) 13 is supported on the column 12 so as to be movable up and down in the vertical Z-axis direction.
- the saddle 13 has a turning head (tool turning means) 14 on a horizontal grindstone turning axis A. It is supported so that it can turn around.
- a slide head (tool horizontal direction moving means) 15 is supported on the revolving head 14 so as to be movable in the horizontal Y-axis direction. Yes.
- a grindstone arbor 16a (see FIG. 8) is supported on the grindstone head 16 so as to be rotatable around the grindstone rotation axis B1, and a barrel-shaped screw-shaped grindstone is described below in detail at the lower end of the grindstone arbor 16a.
- a (screw-like tool) 17 is detachably mounted. Accordingly, by driving the turning head 14 and the grindstone head 16, the threaded grindstone 17 turns around the grindstone turning axis A and also rotates around the grindstone rotating axis B1.
- a rotary table 18 is provided so as to be rotatable around a vertical workpiece rotation axis C1.
- a cylindrical mounting jig 19 is attached to the upper surface of the rotary table 18, and a workpiece W that is an internal gear to be processed is detachably attached to the upper peripheral surface of the mounting jig 19. . Therefore, by driving the rotary table 18, the workpiece W rotates around the workpiece rotation axis C1.
- a dressing device 20 is provided on the side of the rotary table 18 in the Y-axis direction.
- a disk-shaped disk dresser 56 for dressing the threaded grindstone 17 is detachably mounted on the dressing device 20.
- the column 12, the saddle 13, the swivel head 14, the slide head 15, the grindstone head 16, the dressing device 20, and a dresser swivel driving motor 53 to be described later constitute dressing means.
- the dressing apparatus 20 includes a base portion 31 provided on the upper portion of the bed 11 and a swiveling portion 32 provided on the upper portion of the base portion 31.
- the base portion 31 includes a fixed portion 41 and a rotating portion 42, and the fixed portion 41 is fixed to the upper surface of the bed 11, and the rotating portion 42 is around a dresser advance / retreat axis C ⁇ b> 2 that is perpendicular to the fixed portion 41. It is supported so that it can be indexed and rotated.
- a base end of the swivel unit 32 is supported at the center of the upper surface of the rotation unit 42, and a disk dresser 56 is attached to the distal end side of the swivel unit 32.
- the turning portion 32 turns around the dresser advance / retreat axis C ⁇ b> 2 by rotating the rotating portion 42 relative to the fixed portion 41 of the base portion 31.
- the disk dresser 56 can advance and retreat between a dress position P2 where the threaded grindstone 17 can be dressed and a retract position P1 retracted from the dress position P2 during grinding.
- a cylindrical storage portion 51 is formed on the distal end side of the turning portion 32.
- the rotating shaft 52 is accommodated rotatably around the horizontal dresser turning axis B2 via a plurality of bearings.
- a direct drive type dresser turning drive motor (dresser turning means) 53 is interposed between the storage portion 51 and the rotating shaft 52.
- the dresser turning drive motor 53 includes an outer stator 53a and a rotor 53b disposed on the radially inner side of the stator 53a.
- the stator 53 a is fixed to the inner peripheral surface of the storage portion 51, while the rotor 53 b is fixed to the outer peripheral surface of the rotation shaft 52. That is, by driving the dresser turning drive motor 53, the rotor 53 b rotates with respect to the stator 53 a, so that the rotating shaft 52 can rotate with respect to the storage portion 51.
- a dresser rotation drive motor 55 is supported at one end of the rotation shaft 52 via a support member 54.
- the output shaft of the dresser rotation driving motor 55 is rotatable around the dresser rotation axis C3, and a disk dresser 56 is mounted on the output shaft. Accordingly, by driving the dresser turning drive motor 53 and the dresser rotation driving motor 55, the disk dresser 56 turns around the dresser turning axis B2 and also rotates around the dresser rotation axis C3.
- the dresser swivel axis B2 and the dresser rotation axis C3 are arranged so as to be orthogonal to each other.
- the dresser swivel axis B2 is disposed between the cutting edges (blade surfaces) of the disk dresser 56 mounted on the dresser rotation driving motor 55. It is located to pass. That is, when the disk dresser 56 is mounted on the dresser rotation drive motor 55, the mounting position of the disk dresser 56 is set so that the dresser turning shaft B2 passes between the blade edges.
- an encoder 57 is connected to the other end of the rotating shaft 52 on the outside of the storage portion 51. Thereby, when the rotating shaft 52 rotates, the rotation angle is always detected by the encoder 57.
- a brake mechanism 58 that can stop the rotation of the rotary shaft 52 is provided between the other end side of the rotary shaft 52 and the storage portion 51.
- the brake mechanism 58 includes a rotating disk 71 on the rotating shaft 52 side and a fixing member 72 on the storage unit 51 side.
- the rotating disk 71 is formed in a disk shape and is key-coupled to the rotating shaft 52.
- a plurality of fixing members 72 are arranged at equal intervals in the circumferential direction on the radially outer side of the rotating shaft 52, and one end thereof is fixed to the inner peripheral surface of the storage portion 51, while the other end Is capable of sliding contact with the outer peripheral surface of the rotating shaft 52.
- a coil 73 In the fixing member 72, a coil 73, a spring 74, and a support pin 75 are embedded.
- the coil 73 is energized to generate a magnetic force when the internal gear grinding machine 1 is powered on.
- One end of the spring 74 is supported in the fixing member 72 to generate an urging force in the axial direction of the rotating shaft 52 (direction of the dresser turning axis B2) toward the outside of the fixing member 72. is there.
- a disk-shaped armature 76 is fitted on the outer side of the rotating shaft 52, and the armature 76 is slidably supported by the support pin 75 at the outer periphery thereof and is in contact with the other end of the spring 74. Are arranged to be. Further, a brake plate 77 is supported on the support pin 75. That is, the rotating disk 71 fixed to the rotating shaft 52 is disposed so as to be sandwiched between the armature 76 and the brake plate 77 in the axial direction of the rotating shaft 52.
- the internal gear grinding machine 1 is provided with a coolant supply device (not shown).
- the coolant supplied from the coolant supply device is sprayed toward the processed portion of the threaded grindstone 17 by the disk dresser 56 during dressing. Therefore, as shown in FIGS. 3 and 4, a coolant injection port 59 for injecting the coolant is supported on the swivel portion 32 of the dressing device 20.
- the workpiece W to be ground by the internal gear grinding machine 1 is provided with workpiece specifications such that a predetermined tooth profile shape is obtained, and a predetermined twist angle is given to the tooth profile. It has been.
- the thread-like grindstone 17 that grinds the workpiece W is provided in a barrel shape with grindstone specifications that appropriately mesh with the workpiece specifications, The blade shape is given a predetermined twist angle.
- the thread-like grindstone 17 is formed in a barrel shape whose diameter is gradually reduced from the axially intermediate portion toward both axial end portions, and its axial length (grindstone width). Length) is the length h.
- the workpiece rotation axis of the workpiece W is increased in order to increase the relative speed (sliding speed) generated between them and increase the grinding speed.
- the grindstone rotation axis B1 of the threaded grindstone 17 can turn so as to intersect with C1 at a predetermined axis crossing angle (hereinafter referred to as an axis angle ⁇ ). That is, the threaded grindstone 17 rotates around the grindstone rotation axis B1 that intersects with the workpiece rotation axis C1 of the workpiece W at an axis angle ⁇ . Therefore, by forming the threaded grindstone 17 in a barrel shape, the threaded grindstone 17 attached at the shaft angle ⁇ can be engaged with the workpiece W.
- the workpiece W is mounted on the mounting jig 19.
- the column 12, the saddle 13, the turning head 14, and the slide head 15 are driven to move the threaded grindstone 17 in the X-axis, Y-axis, and Z-axis directions, and the shaft angle corresponding to the torsion angle of the workpiece W It is swung around the grindstone swivel axis A so as to be ⁇ and arranged inside the workpiece W.
- the column 12 is driven to move the threaded grindstone 17 in the X-axis direction (left side in FIG. 1) and mesh with the workpiece W (see FIG. 8), and then the grindstone head 16 is driven to The shaped grindstone 17 is rotated around the grindstone rotation axis B1, and the rotary table 18 is driven to rotate the workpiece W around the workpiece rotation axis C1.
- the column 12 and the saddle 13 are further driven to swing the threaded grindstone 17 in the Z-axis direction while moving in the X-axis direction. As a result, the threaded grindstone 17 is cut into the workpiece W, and the tooth surface of the workpiece W is ground by the blade surface of the threaded grindstone 17.
- the meshing position of the threaded grinding wheel 17 with the workpiece W during grinding is a contact (meshing) line 17a as shown in FIG. That is, in grinding the workpiece W with the threaded grinding wheel 17, the plurality of blade surfaces of the threaded grinding wheel 17 grind the plurality of tooth surfaces of the workpiece W simultaneously.
- the base portion 31 of the dressing apparatus 20 is driven to rotate the rotating portion 42 with respect to the fixed portion 41.
- the turning portion 32 turns around the dresser advance / retreat axis C2
- the disk dresser 56 turns 90 ° from the retracted position P1 to the dress position P2.
- the dresser turning drive motor 53 is driven, and the disk dresser 56 is turned around the dresser turning axis B2 in accordance with the twist angle of the threaded grindstone 17.
- the coil 73 of the brake mechanism 58 is energized and the armature 76 resists the biasing force of the spring 74. Is attracted to the coil 73.
- the rotation of the rotary disk 71 is allowed, the brake is turned off, and the rotary shaft 52 is rotatable.
- the column 12, the saddle 13 and the slide head 15 are driven to move the threaded grindstone 17 in the X-axis, Y-axis, and Z-axis directions, so that the disk dresser 56 disposed at the dress position P2 is Opposite in the axial direction.
- the swivel head 14 is driven so that the grindstone rotation axis B1 is swung in the vertical direction, and the swivel angle (axis angle ⁇ ) is 0 °. It has become.
- the slide head 15 is driven to move the threaded grindstone 17 in the Y-axis direction and mesh with the disk dresser 56 disposed at the dress position P2 (see FIG. 9).
- the column 12, saddle 13, slide head 15 and grindstone head 16 are driven according to the helix angle and barrel shape of the threaded grindstone 17, and the screw grindstone 17 is moved to the grindstone.
- the disk dresser 56 is rotated about the dresser rotation axis B2 and rotated about the dresser rotation axis C3.
- the disk dresser 56 cuts into the threaded grinding wheel 17, and the blade surface of the threaded grinding wheel 17 is dressed by the blade surface of the disk dresser 56.
- This dressing operation is performed for the number of blade grooves of the threaded grindstone 17.
- the coolant is sprayed from the coolant spray port 59 toward the processed portion of the threaded grindstone 17 by the disk dresser 56.
- the disk dresser 56 is turned from the dressing position P2 to the retracted position P1 to be in a standby state, while a predetermined number of workpieces W are ground by the dressed screw-shaped grindstone 17. Further, such a series of operations is repeatedly performed.
- FIG. 10A shows the relationship between the axial position of the threaded grindstone 17 with which the disk dresser 56 contacts and the turning angle around the dresser turning axis B2 of the disk dresser 56.
- a downwardly convex quadratic curve relationship is established. That is, the turning angle of the disk dresser 56 is the smallest in the axially intermediate portion of the screw-shaped grindstone 17 and the meshing position of the disk dresser 56 is the upper end in the axial direction of the screw-shaped grindstone 17. It is set to gradually increase as it moves toward the part side or the lower end side in the axial direction. The reason for this setting is that since the threaded grindstone 17 has a barrel shape, its twist angle increases from its axially intermediate part toward both axially opposite ends. This is because the turning angle of the dresser 56 is also increased.
- FIG. 10B shows the relationship between the axial position of the threaded grindstone 17 with which the disk dresser 56 contacts and the rotational angle of the threaded grindstone 17 around the grindstone rotation axis B1.
- the threaded grindstone 17 moves to the lower end side in the axial direction, it is set to gradually increase in the left rotation direction.
- FIG. 10C shows the relationship between the axial position of the threaded grinding wheel 17 with which the disk dresser 56 contacts and the amount of movement of the threaded grinding wheel 17 in the X-axis direction.
- a curvilinear relationship is established. That is, the amount of movement of the threaded grinding wheel 17 in the X-axis direction is such that the grinding wheel rotational axis B1 approaches the workpiece rotational axis C1 as the meshing position of the disk dresser 56 moves toward the upper end of the axial direction of the threaded grinding wheel 17.
- the meshing position of the disk dresser 56 is set to gradually increase in the direction away from the workpiece rotation axis C1 as the meshing position of the disk dresser 56 moves toward the lower end side in the axial direction of the threaded grinding wheel 17.
- the amount of movement of the screw-shaped grindstone 17 in the X-axis direction is point-symmetric with respect to the axial position where the disk dresser 56 is in contact with respect to the intermediate portion in the axial direction.
- FIG. 10 (d) shows the relationship between the axial position of the threaded grindstone 17 with which the disk dresser 56 contacts and the amount of movement of the threaded grindstone 17 in the Y-axis direction.
- a convex quadratic curve relationship is established. That is, the amount of movement of the threaded grindstone 17 in the Y-axis direction becomes the largest in the direction in which the grindstone rotation axis B1 moves away from the dresser rotation axis C3 at the intermediate position of the threaded grindstone 17 at the meshing position of the disk dresser 56.
- the meshing position of the disk dresser 56 is set so that the grindstone rotation axis B1 gradually increases in a direction approaching the dresser rotation axis C3 as the threaded grindstone 17 moves toward the axial upper end side or the axial lower end side. ing.
- the reason for setting in this way is that the threaded grindstone 17 has a barrel shape, so that its diameter dimension gradually decreases from the axial intermediate portion toward both axial end portions. This is because the cut amount of the disk dresser 56 also gradually increases.
- FIG. 10E shows the relationship between the axial position of the threaded grinding wheel 17 with which the disk dresser 56 contacts and the amount of movement of the threaded grinding wheel 17 in the Z-axis direction.
- the relationship is established. That is, the amount of movement of the threaded grinding wheel 17 in the Z-axis direction gradually increases downward in the vertical direction as the engagement position of the disk dresser 56 moves toward the upper end in the axial direction, while the engagement position of the disk dresser 56 increases. As it moves to the lower end side in the axial direction, it is set to gradually increase upward in the vertical direction.
- the blade surface of the disk dresser 56 becomes the blade of the threaded grindstone 17.
- the dressing is performed by contacting the surface in the same manner as the tooth surface of the workpiece W that is in contact (engaged) with the contact line 17a.
- the dresser turning drive motor 53 is a direct drive type motor, unlike a motor using a gear, backlash can be suppressed. As a result, the disk dresser 56 can be turned continuously and smoothly. In addition, since the encoder 57 is connected to the dresser turning drive motor 53, the disk dresser 56 can be positioned with high accuracy with respect to the twist angle of the threaded grinding wheel 17.
- the coolant injection port 59 is provided in the swivel part 32 of the dressing device 20 that performs the advance / retreat operation of the disk dresser 56, the disk dresser 56 is disposed at the dress position P2, and the coolant injection port 59 is also a predetermined one. Since it is disposed at the position, it is not necessary to adjust the position of the coolant injection port 59 at the time of dressing.
- the dressing position P2 of the disk dresser 56 is set on the Y-axis direction side with respect to the threaded grindstone 17 to be dressed, but this dressing position P2 is the threaded grindstone to be dressed. 17 may be set on the X-axis direction side. In such a configuration, during dressing, the operation in the X-axis direction and the operation in the Y-axis direction of the threaded grindstone 17 and the disk dresser 56 can be switched.
- the entire dressing operation is performed by operating the threaded grindstone 17 and the disk dresser 56 in accordance with the twist angle and barrel shape of the threaded grindstone 17 during dressing. Is simplified and the operating range can be minimized, so that the space-saving and miniaturization of the dressing device 20 can be achieved. As a result, the entire internal gear grinding machine 1 can be reduced in size.
- the present invention can be applied to an internal gear grinding machine equipped with a dressing device capable of speeding up the dressing operation during non-grinding.
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- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
ワーク回転軸周りに回転可能な被加工内歯車と、前記ワーク回転軸と所定の軸交差角を有する工具回転軸周りに回転可能な樽形のねじ状工具とを、噛み合せて同期回転させることにより、被加工内歯車に研削加工を行う内歯車研削盤において、
前記ねじ状工具と、ドレッサ回転軸周りに回転可能な円盤状のドレッサとを、噛み合わせることにより、前記ねじ状工具をドレッシングするドレッシング手段を備え、
前記ドレッシング手段は、
前記ドレッサを前記ドレッサ回転軸と直交するドレッサ旋回軸周りに旋回させるドレッサ旋回手段と、
前記ねじ状工具を前記工具回転軸周りに回転させる工具回転手段と、
前記ねじ状工具を鉛直方向に移動させる工具鉛直方向移動手段と、
前記ねじ状工具を前記工具回転軸と前記ドレッサ回転軸との間の距離を調整するように移動させる工具水平向移動手段と、
前記ねじ状工具を工具回転軸方向及び水平方向と直交する方向に移動させる工具横方向移動手段とを有し、
前記ねじ状工具の形状に応じて、前記ドレッサ旋回手段、前記工具回転手段、前記工具鉛直方向移動手段、前記工具水平方向移動手段、及び、前記工具横方向移動手段を駆動する
ことを特徴とする。
ドレッシング時に、前記ねじ状工具を鉛直に配置した前記工具回転軸周りに回転させる
ことを特徴とする。
前記ねじ状工具を前記ワーク回転軸と直交する工具旋回軸周りに旋回させる工具旋回手段を備える
ことを特徴とする。
ワーク回転軸周りに回転可能な被加工内歯車に研削加工を行うときに、前記ワーク回転軸に対して軸交差角が与えられた状態で噛み合わされるために、その軸方向中間部から軸方向両端部に向かうに従って、その径が漸次小さくなるような樽形に形成されるねじ状工具と、円盤状のドレッサとを、噛み合わせることにより、前記ねじ状工具をドレッシングするドレッシング方法であって、
前記ドレッサを、ドレッサ回転軸周りに回転させると共に、前記ドレッサ回転軸と直交するドレッサ旋回軸周りに旋回させる一方、
前記ねじ状工具を、工具回転軸周りに回転させると共に、鉛直方向、前記工具回転軸と前記ドレッサ回転軸との間の距離を調整する方向、工具回転軸方向及び前記工具回転軸と前記ドレッサ回転軸との間の距離を調整する方向と直交する方向に、移動させる
ことを特徴とする。
前記ドレッサは、
前記ドレッサが接触する前記ねじ状工具の軸方向位置に対する前記ドレッサ旋回軸周りの旋回角度が、2次曲線的に変化するように、前記ドレッサ旋回軸周りに旋回し、
前記ねじ状工具は、
前記ドレッサが接触する前記ねじ状工具の軸方向位置に対する前記工具回転軸周りの回転角度が、直線的に変化するように、前記工具回転軸周りに回転し、
前記ドレッサが接触する前記ねじ状工具の軸方向位置に対する鉛直方向の移動量が、直線的に変化するように、鉛直方向に移動し、
前記ドレッサが接触する前記ねじ状工具の軸方向位置に対する前記工具回転軸と前記ドレッサ回転軸との間の距離を調整する方向の移動量が、2次曲線的に変化するように、前記工具回転軸と前記ドレッサ回転軸との間の距離を調整する方向に移動し、
前記ドレッサが接触する前記ねじ状工具の軸方向位置に対する工具回転軸方向及び前記工具回転軸と前記ドレッサ回転軸との間の距離を調整する方向と直交する方向の移動量が、3次曲線的に変化するように、工具回転軸方向及び前記工具回転軸と前記ドレッサ回転軸との間の距離を調整する方向と直交する方向に移動する
ことを特徴とする。
Claims (5)
- ワーク回転軸周りに回転可能な被加工内歯車と、前記ワーク回転軸と所定の軸交差角を有する工具回転軸周りに回転可能な樽形のねじ状工具とを、噛み合せて同期回転させることにより、被加工内歯車に研削加工を行う内歯車研削盤において、
前記ねじ状工具と、ドレッサ回転軸周りに回転可能な円盤状のドレッサとを、噛み合わせることにより、前記ねじ状工具をドレッシングするドレッシング手段を備え、
前記ドレッシング手段は、
前記ドレッサを前記ドレッサ回転軸と直交するドレッサ旋回軸周りに旋回させるドレッサ旋回手段と、
前記ねじ状工具を前記工具回転軸周りに回転させる工具回転手段と、
前記ねじ状工具を鉛直方向に移動させる工具鉛直方向移動手段と、
前記ねじ状工具を前記工具回転軸と前記ドレッサ回転軸との間の距離を調整するように移動させる工具水平向移動手段と、
前記ねじ状工具を工具回転軸方向及び水平方向と直交する方向に移動させる工具横方向移動手段とを有し、
前記ねじ状工具の形状に応じて、前記ドレッサ旋回手段、前記工具回転手段、前記工具鉛直方向移動手段、前記工具水平方向移動手段、及び、前記工具横方向移動手段を駆動する
ことを特徴とする内歯車研削盤。 - 請求項1に記載の内歯車研削盤において、
ドレッシング時に、前記ねじ状工具を鉛直に配置した前記工具回転軸周りに回転させる
ことを特徴とする内歯車研削盤。 - 請求項1に記載の内歯車研削盤において、
前記ねじ状工具を前記ワーク回転軸と直交する工具旋回軸周りに旋回させる工具旋回手段を備える
ことを特徴とする内歯車研削盤。 - ワーク回転軸周りに回転可能な被加工内歯車に研削加工を行うときに、前記ワーク回転軸に対して軸交差角が与えられた状態で噛み合わされるために、その軸方向中間部から軸方向両端部に向かうに従って、その径が漸次小さくなるような樽形に形成されるねじ状工具と、円盤状のドレッサとを、噛み合わせることにより、前記ねじ状工具をドレッシングするドレッシング方法であって、
前記ドレッサを、ドレッサ回転軸周りに回転させると共に、前記ドレッサ回転軸と直交するドレッサ旋回軸周りに旋回させる一方、
前記ねじ状工具を、工具回転軸周りに回転させると共に、鉛直方向、前記工具回転軸と前記ドレッサ回転軸との間の距離を調整する方向、工具回転軸方向及び前記工具回転軸と前記ドレッサ回転軸との間の距離を調整する方向と直交する方向に、移動させる
ことを特徴とする樽形ねじ状工具のドレッシング方法。 - 請求項4に記載の樽形ねじ状工具のドレッシング方法において、
前記ドレッサは、
前記ドレッサが接触する前記ねじ状工具の軸方向位置に対する前記ドレッサ旋回軸周りの旋回角度が、2次曲線的に変化するように、前記ドレッサ旋回軸周りに旋回し、
前記ねじ状工具は、
前記ドレッサが接触する前記ねじ状工具の軸方向位置に対する前記工具回転軸周りの回転角度が、直線的に変化するように、前記工具回転軸周りに回転し、
前記ドレッサが接触する前記ねじ状工具の軸方向位置に対する鉛直方向の移動量が、直線的に変化するように、鉛直方向に移動し、
前記ドレッサが接触する前記ねじ状工具の軸方向位置に対する前記工具回転軸と前記ドレッサ回転軸との間の距離を調整する方向の移動量が、2次曲線的に変化するように、前記工具回転軸と前記ドレッサ回転軸との間の距離を調整する方向に移動し、
前記ドレッサが接触する前記ねじ状工具の軸方向位置に対する工具回転軸方向及び前記工具回転軸と前記ドレッサ回転軸との間の距離を調整する方向と直交する方向の移動量が、3次曲線的に変化するように、工具回転軸方向及び前記工具回転軸と前記ドレッサ回転軸との間の距離を調整する方向と直交する方向に移動する
ことを特徴とする樽形ねじ状工具のドレッシング方法。
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