JP2017042848A - Gear polishing tool and polishing sheet used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gear polishing tool and a polishing sheet used therefor, capable of easily executing work for forming a polishing part along its surface shape on the polishing side surface side of a tooth part of a gear-shaped body, in the gear polishing tool having the gear-shaped body molded in a gear shape of meshing with a processed gear, and polishing when the gear-shaped body meshes with the processed gear.SOLUTION: A gear polishing tool comprises a gear-shaped body 8 molded in a gear shape of meshing with a processed gear 2 and a polishing sheet 9 formed of a separate body from the gear-shaped body 8 and stuck to a polishing side surface 7a in a tooth part 7, and the polishing sheet 9 comprises a resiliently deformable deformation sheet piece 11 stuck to the polishing side surface 7a and a processed gear side sheet piece 12 stuck to an opposite side surface of the gear-shaped body 8-side of the deformation sheet piece 11, and a polishing part 16 including an abrasive grain is formed on an outer surface of the processed gear side sheet piece 12.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a gear polishing tool for polishing a tooth surface of a gear to be processed and a polishing sheet used therefor.

  A gear-shaped main body formed in a gear shape having a tooth portion that meshes with a gear to be processed, and a polishing portion including abrasive grains is integrally formed on the polishing side surface of the tooth portion along the surface shape. A technique for polishing the tooth surface of the gear to be processed by rotating the gear-shaped main body while meshing with the gear to be processed is known (for example, see Patent Document 1). .

No. 7-8137

In the above-mentioned document, a polishing part is formed on the polishing side surface along the surface shape, thereby reducing useless use of abrasive grains constituting the polishing part and improving economy.
However, the work of forming the polishing part on the polishing side surface by directly bonding the abrasive grains to the polishing side surface having a complicated shape, or the process of forming the polishing part on the polishing side surface by integral sintering, etc. In some cases, skill is required, and the cost may be high.

  The present invention includes a gear-shaped main body formed in a gear shape that meshes with a gear to be machined, and the gear-shaped main body meshes with the gear to be machined to perform polishing, and polishing a tooth portion of the gear-shaped main body. It is an object of the present invention to provide a gear polishing tool and a polishing sheet used for the gear polishing tool capable of easily performing a work for forming a polishing portion on the side surface along the surface shape.

  A gear polishing tool of the present invention is a gear polishing tool for polishing a tooth surface of a gear to be processed, the gear-shaped main body formed into a gear shape having a tooth portion that meshes with the gear to be processed, and the gear. A polishing sheet that is formed separately from the main body and is affixed to the polishing side surface of the tooth portion, and the polishing sheet includes a deformation sheet piece that is affixed to the polishing side surface, and the gear of the deformation sheet piece A processed gear side sheet piece that is affixed to a surface opposite to the main body side and contacts the tooth surface of the processed gear when meshed with the processed gear, and the deformed sheet piece is elastic A polishing portion including abrasive grains is integrally formed on the outer surface of the gear piece to be processed, which is a surface opposite to the deformation sheet piece.

  According to the above configuration, the polishing sheet formed separately from the gear-shaped main body is attached to the polishing side surface of the gear-shaped main body, so that the surface of the gear-shaped main body on the polishing side surface is aligned with the surface shape. Thus, since the polishing portion is formed, the operation of providing the polishing portion in a desired state can be easily performed, and the cost can be reduced. Further, since the deformed sheet piece of the polishing sheet functions as an impact absorbing member or a member that allows a meshing error during the polishing operation due to its own elastic deformation, the efficiency of the polishing operation is improved. Furthermore, the function of the deformed sheet piece expands the material selection range of the gear piece to be processed, and for example, it is possible to employ a material that is easy to hold, such as abrasive grains, and the product life of the abrasive sheet Can be extended.

  The polishing portion may be formed on the outer surface by loose abrasive particles for lapping polishing that are movably attached to the outer surface of the processed gear side sheet piece.

  The polishing portion may be integrally formed on the outer surface by fixed abrasive grains fixedly attached to the outer surface of the gear side sheet piece to be processed.

  The abrasive sheet of the present invention is an abrasive sheet that is affixed to the gear-shaped main body of a gear polishing tool, and the gear-shaped main body formed into a gear shape so as to have a tooth portion that meshes with a gear to be processed. A deformed sheet piece to be affixed to the grinding side surface of the tooth portion, affixed to the surface of the deformed sheet piece on the side opposite to the gear-shaped main body side, and on the tooth surface of the processed gear when engaged with the processed gear. The deformed sheet piece is configured to be elastically deformable, and abrasive grains are provided on an outer surface of the polishing side sheet piece opposite to the deformed sheet piece side. The included polishing portion is integrally formed.

  A protective sheet that covers and protects a pre-formed adhesive layer on the side of the deformable sheet piece that contacts the polishing side surface before being attached to the polishing side surface of the tooth portion, and a state before polishing Thus, a protective cover that covers and protects the polishing portion may be provided.

  By attaching a polishing sheet formed separately from the gear-shaped main body to the polishing side surface of the gear-shaped main body, a polishing portion is formed along the surface shape on the polishing side surface of the tooth portion of the gear-shaped main body. Therefore, it is possible to easily perform the operation of providing the polishing unit in a desired state, and it is possible to reduce the cost. Further, since the deformed sheet piece of the polishing sheet functions as an impact absorbing member or a member that allows a meshing error during the polishing operation due to its own elastic deformation, the efficiency of the polishing operation is improved. Furthermore, the function of the deformed sheet piece expands the material selection range of the gear piece to be processed, and for example, it is possible to employ a material that is easy to hold, such as abrasive grains, and the product life of the abrasive sheet Can be extended.

(A), (B) is the side view and front view of the grinding | polishing apparatus to which this invention is applied. It is a principal part front sectional view of the meshing part of FIG. It is a perspective view which shows the structure by the side of the tooth | gear part of the tool for gear grinding | polishing. It is sectional drawing which shows the structure of the polishing sheet in the state affixed on the grinding | polishing side surface of the tooth | gear part. (A), (B) is sectional drawing and an exploded sectional view of an abrasive sheet in a state before being affixed. It is explanatory drawing explaining the state before cutting out of the protective cover which functions as a pattern paper. It is sectional drawing which shows the structure of the modification of an abrasive sheet. (A), (B) is the side view and front view which show the structure of other embodiment of this invention. It is a sectional side view of the polish device concerning other embodiments. (A) and (B) are the top views and side views of the gear grinding | polishing tool shown in FIG. (A) is a principal part enlarged view which shows a grinding | polishing operation state, (B) is explanatory drawing which shows the cutout shape of an abrasive sheet. (A), (B) is sectional drawing and the exploded sectional view which respectively show the attachment structure of an abrasive sheet. It is sectional drawing which shows the structure of the modification of the polishing sheet 9 shown in FIG. 9 thru | or FIG. It is a sectional side view which shows the structure of the modification of the grinding | polishing apparatus 1 shown in FIG. 9 thru | or FIG.

  FIGS. 1A and 1B are a side view and a front view of a polishing apparatus to which the present invention is applied, and FIG. 2 is a front sectional view of a main part of a meshing portion of FIG. The illustrated polishing apparatus 1 includes a gear polishing tool 4 formed in a gear shape that meshes with a tooth 3 of a processing gear 2 to be processed, and a processing side support mechanism that rotatably supports the processing gear 2. And a tool side support mechanism that rotatably supports the gear polishing tool 4.

  In this example, the workpiece gear 2 is an external helical gear, and the gear polishing tool 4 is an external gear having a tooth portion 7 that meshes with the teeth 3 of the workpiece gear 2. It has a gear-shaped main body 8 formed in a helical gear shape, and a polishing sheet 9 (see FIGS. 2 to 5) formed separately from the gear-shaped main body 8. The polishing sheet 9 will be described later.

  The rotation axis S1 of the work gear 2 and the rotation axis S2 of the gear polishing tool 4 are inclined with respect to each other, and the angle (axis crossing angle) θ between them is the work gear 2 and the gear polishing tool. At the time of meshing synchronous rotation with the gear 4, relative slip is generated on the contact surface side, and the teeth 3 of the gear 2 to be machined are polished by the gear polishing tool 4 by this relative slip.

  By this polishing, in addition to general polishing of the tooth surface 3a (see FIG. 2) of the tooth 3 of the gear to be processed, mirror finishing, removal of scratches and dents on the tooth surface 3a and the like are performed. Incidentally, when the synchronous rotation is performed, it is necessary to provide actuators such as a motor for rotating the workpiece gear 3 and the gear polishing tool 4 in the workpiece side support mechanism and the tool side support mechanism, respectively.

  FIG. 3 is a perspective view showing the configuration of the tooth side of the gear polishing tool, and FIG. 4 is a cross-sectional view showing the configuration of the polishing sheet attached to the polishing side surface of the tooth unit. The tooth portion 7 of the gear polishing tool 4 is formed of a rigid body such as metal, and the shape thereof is formed so as to be able to mesh with the tooth 3 of the gear 2 to be processed, and the rotation direction of the tooth portion 7 formed into the shape is formed. On the front side, a polishing side surface 7a, which is a surface on the side where the tooth surface 3a is polished when the gear 2 to be machined is rotated, is formed.

  The polishing sheet 9 is affixed to the polishing side surface 7a of the tooth portion 7 and is deformed flexibly and flexibly (more specifically, elastically deformed), a deformed sheet piece (deformed sheet) 11, and the deformed sheet piece 11 Of the gear 2 to be machined when the gear grinding tool 4 (gear-shaped body 8) and the gear 2 to be machined are engaged with each other and the surface (inner surface) opposite to the surface (inner surface) in contact with the grinding side surface 7a. 3 to be processed and the processed gear side sheet piece (processed gear side sheet) 12 in contact with the third tooth surface 3a.

  The deformable sheet piece 11 is made of a deformable material having flexibility and elasticity, and specifically, is made of a urethane resin or the like. The inner surface side of the deformable sheet piece 11 is attached to the polished side surface 7 a of the tooth portion 7 with a strong adhesive (adhesive layer) 13.

  The processed gear side sheet piece 12 is attached to the outer surface side of the deformable sheet piece 11 via an adhesive (adhesive layer) 14. A polishing portion 16 containing abrasive grains such as diamond and CBN is formed on the surface (outer surface) opposite to the surface (inner surface) to be bonded to the deformable sheet piece 11 in the processed gear side sheet piece 12. Yes.

  Specifically, the abrasive portion 16 is integrally formed on the outer surface of the workpiece-gear-side sheet piece 12 by affixing abrasive grains to the outer surface. That is, the abrasive grains become fixed abrasive grains that are fixedly adhered to the outer surface side of the processed gear side sheet piece 12 with an adhesive or the like, and the infinite number of fixed abrasive grains constitute a polishing portion. In addition to this, the polishing portion 16 may be formed by, for example, causing electrodeposited straight hair to a yarn-like pile containing abrasive grains on the outer surface.

  On the other hand, when processing the tooth surface 3a into a more sophisticated mirror surface, lapping polishing can be performed using loose abrasive grains as abrasive grains constituting the polishing portion 16 instead of fixed abrasive grains. The polishing unit 16 is configured by attaching loose abrasive grains to the outer surface of the workpiece gear-side sheet piece 12. The adhering countless free abrasive grains are attached in a rollable and movable state, unlike fixed abrasive grains fixedly attached with an adhesive or the like.

  For this reason, at the time of lapping polishing operation, the loose abrasive grains slide along the tooth surface 3a of the gear 2 to be processed, move while rolling, and lapping the tooth surface 3a with a stable processing pressure. The tooth surface 3a can be processed into a more sophisticated mirror surface by this stable processing pressure.

  Incidentally, it is possible to attach the free abrasive grains to the outer surface of the gear piece 12 to be processed in advance before the lapping process. In principle, however, in order to prevent the abrasive grains from falling off, lapping During polishing, loose abrasive grains are supplied to the outer surface of the gear piece 12 to be processed.

  The processed gear side sheet piece 12 is made of a material having sufficient strength to hold the abrasive grains of the polishing portion 16, and the material is, for example, metal foil, polyester, polyethylene, carbon sheet, or the like. It is. Furthermore, when using metal foil, it is good also as a thing with further favorable holding | maintenance performance of an abrasive grain using what was formed in net shape, and what was pierced with many holes.

  Further, when the abrasive part 16 is integrally formed on the outer surface of the processed gear side sheet piece 12 by electrodeposition or adhesion or the like, the abrasive grains 16 form a lattice pattern and a plurality of parallel patterns. Draw a geometric pattern such as a straight line pattern, a curved line pattern, or a polka dot pattern, thereby preventing clogging during polishing by making a part of the outer surface of the processed gear side sheet piece 12 non-working surface. May be.

  The polishing sheet 9 configured as described above is cut out into an arc shape corresponding to the polishing side surface 7a of the tooth portion 7, and is affixed to the polishing side surface 7a of each tooth portion 7 of the gear-shaped main body 8, whereby the gear polishing is performed. A polishing mechanism (polishing function) is imparted to the tool 4.

  5A and 5B are a cross-sectional view and an exploded cross-sectional view of the abrasive sheet material, and FIG. 6 is an explanatory view illustrating a state before the protective cover functioning as a pattern is cut out. The deformation sheet piece 11 and the processed gear side sheet piece 12 are cut out from the corresponding sheet materials 17 and 18, respectively. The deformable sheet piece 11 is cut out from the deformable sheet material 17, and the processed gear side sheet piece 12 is cut out from the processed gear side sheet material 18.

  The deformation sheet material 17 is made of the same material as the deformation sheet piece 11. The adhesives (adhesive layers) 13 and 14 described above are formed in advance on both surfaces of the deformable sheet material 17 by application or the like, and the adhesive layers 13 and 14 are formed of a protective sheet 19 made of paper that can be flexibly deformed. , 21 to cover and protect.

  The processed gear side sheet material 18 is made of the same material as the processed gear side sheet piece 12, and a polishing portion 16 is formed on the outer surface thereof.

  A protective cover 22 made of paper or the like that covers and protects the polishing section 16 is also provided. An adhesive layer 23 is formed on the surface of the protective cover 22 on the side to be affixed to the polishing unit 16 by application or the like, and the adhesive layer 23 is covered with a protective sheet 24 made of paper or the like.

  Then, the protective sheet 21 on the adhesive layer 14 side of the deformation sheet 17 is peeled off, the gear sheet material 18 to be processed is pasted, and the protective sheet 24 on the protective cover 22 side is peeled off, By affixing the protective cover 22 to the polishing unit 16 to protect the cover, the polishing sheet material 26 is manufactured.

  The abrasive sheet 9 can be cut out from the abrasive sheet material 26 by using a cut-out drawing 27 of cut formation displayed on the surface (outer surface) opposite to the adhesive layer 23 of the protective cover 22 by printing or the like. That is, the protective cover 22 is also used as a pattern paper. Further, in each cutout drawing 27, a mark 28 indicating the orientation of the abrasive sheet 9 after the cutout, and a model number, a manufacturing number, and the like of the abrasive sheet 9 are displayed by printing or the like. The operator can accurately perform the attaching operation of the polishing sheet 9 by using the mark 28, the model number, the manufacturing number, and the like.

  When the polishing sheet 9 is attached to the polishing side surface 7 a of the tooth portion 7 of the gear polishing tool 4, the protective sheet 19 is peeled off and the attaching operation is performed via the adhesive layer 13. Before performing the polishing operation, the protective cover 22 is peeled off together with the adhesive layer 23, and then the polishing operation is performed.

  The polishing operation by the polishing apparatus 1 will be described. When the gear polishing tool 4 and the gear 2 to be processed are engaged with each other, by rotating both of them, the tooth surface 3a of each tooth 3 of the gear 2 to be processed is rotated. Perform polishing work.

  According to the above configuration, since the gear-shaped main body 8 is a separate body from the polishing sheet 9 including the polishing portion 16, the material of the gear-shaped main body 8 can be freely determined and is hard. A material in which the shape of each portion such as the tooth portion 7 can be molded with high accuracy can be selected as the material of the gear-shaped main body 8, and thus necessary polishing accuracy and strength can be easily ensured.

  Further, the portion of the gear-shaped main body 8 to which the polishing sheet 9 is attached is formed with a thin tooth thickness corresponding to the thickness of the polishing sheet 9, but the thickness of the polishing sheet 9 can be made almost uniform. The high-precision gear polishing tool 4 can be manufactured at low cost.

  Further, due to the elastic force and flexibility of the deformable sheet piece 11, the deformable sheet piece 11 functions as a cushioning material and deforms along the tooth surface 3 a of the gear 2 to be processed. In addition, the generation of a concentrated load on a predetermined part is prevented, and an impact is absorbed. As a result, unpolished defects and abnormal wear of the abrasive grains are prevented, the abrasive grains are prevented from falling off and damaged, and the product life is extended.

  In addition, due to the elastic force and flexibility of the deformable sheet piece 11, a meshing error of the gear 2 to be processed and a mounting error of the polishing sheet 9 to the gear-shaped main body 8 are allowed to some extent. The shape error of the side surface 7a and the shape error of the tooth surface 3a of the tooth 3 are also allowed to some extent by the function of the deformable sheet piece 11, and as a result, the gear-shaped main body 8 ( The need to form the polished side surface 7a) with high accuracy is also reduced.

  On the other hand, the processed gear-side sheet piece 12 is formed separately from the deformable sheet piece 11 and is not required to protect the elastic force and flexibility, and thus is suitable for protecting the abrasive grains constituting the polishing unit 16. Since the material can be selected, it is possible to more efficiently prevent the abrasive grains from dropping off or being damaged.

  Further, since the polishing sheet 9 is flexibly deformed and pasted in correspondence with the tooth portions 7 of various shapes, the polishing sheet 9 can be formed as long as the tooth portions 7 of the gear-shaped main body 8 that is a rigid body can be formed. Since various shapes can be easily created, it is compatible with various types of gears and is highly versatile.

  Specifically, the present invention can be applied to an external gear and an internal gear, and can be applied to all gears such as a screw gear, a bevel gear, and a hypoid gear.

  Also, when performing the polishing operation, by controlling the processing pressure and the meshing rotation speed, the abrasive grains 16 can be prevented from being worn and dropped, and the abrasive surface can be prevented from being clogged. It is easy to finish the mirror surface by the damper effect due to the elasticity of 9, and the performance (transmission efficiency, tooth surface strength) of the gear 2 to be machined is greatly improved by the mirror surface processing of the tooth surface 3a. This also contributes to an improvement in fuel consumption of an automobile using the work gear 2.

  Furthermore, if the gear-shaped main body 8 is formed using a light material, the whole can be reduced in weight, and processing energy can be reduced. Incidentally, it is possible to easily reduce the weight by adopting a means using a lightweight rigid material as a material or a hollow shape as the gear-shaped main body 8.

  Further, for the purpose of increasing the strength of the gear, a method of applying a residual stress to the surface of the gear by causing a hard shot ball to collide with the hardened gear 2 to be processed is widely used. Fine indentations (unevenness) remain on the surface of the work gear 2, and wear of the tooth surface 3a may be promoted due to the indentations (particularly convex portions) remaining on the surface. However, since the polishing portion 16 using the fine abrasive grains as described above can eliminate fine irregularities (particularly convex portions) on the surface of the gear 2 to be processed, measures against such problems can be taken.

  Note that the polishing sheet 9 may be formed as a single piece by forming a polishing portion 16 on the outer surface of the deformation sheet piece 11 as in the modification shown in FIG. For example, when lapping polishing is performed, loose abrasive grains may be attached to the outer surface of the deformable sheet piece 11. On the other hand, even when performing normal polishing, the abrasive grains may be fixedly adhered to the outer surface of the deformable sheet piece 11 so as to be kneaded.

  Next, a different part from the above-mentioned form is demonstrated about other embodiment of this invention based on FIG.

  8A and 8B are a side view and a front view showing the configuration of another embodiment of the present invention. In the example shown in the figure, the gear-shaped main body 8 of the gear polishing tool 4 is formed into the shape of an internal-toothed helical gear that meshes with the workpiece gear 2 that is an external-toothed helical gear. A polishing sheet 9 is attached to the tooth portion 7 (more specifically, the polishing side surface 7a of the tooth portion 7) by the same means as described above.

  Next, based on FIG. 9 thru | or FIG. 12, about another embodiment of the grinding | polishing apparatus 1, a different part from the above-mentioned form is demonstrated.

  9 is a side sectional view of a polishing apparatus according to another embodiment, and FIGS. 10A and 10B are a plan view and a side view of the gear polishing tool shown in FIG. ) Is an enlarged view of a main part showing a polishing operation state, and (B) is an explanatory view showing a cutout shape of the polishing sheet. The gear grinding tool 4 meshed with the teeth 3 of the workpiece gear 2 is rotated by the tool-side support mechanism 29, whereby the teeth 3 of the workpiece gear 2 supported rotatably by the workpiece-side support mechanism. Polishing operation is performed on the tooth surface 3a.

  The gear-shaped main body 8 of the gear polishing tool 4 has a gear shape (specifically, multiple gear teeth) having a helical tooth portion 7 that meshes with the teeth 3 of the workpiece gear 2 that is a helical gear. The polishing sheet 9 is affixed to the polishing side surface 7 a of the tooth portion 7.

  The gear-shaped main body 8 is made of any material that satisfies the required strength (for example, a metal material, hard plastic, or the like), and the shape of the gear-shaped main body 8 only needs to be formed into a gear shape that can mesh with the gear 2 to be processed. However, it is not limited to the above multi-threaded shape. For example, when the gear 2 to be machined is an externally toothed spur gear or a helical gear, the gear-shaped main body 8 is formed into a mountain-shaped screw-shaped gear shape, or a lotus with the above-mentioned crossing angle θ taken into account. It is formed into a gear shape. In addition, it is formed into the above-mentioned internal gear type gear.

  In addition, a cylindrical mounting hole 8a is formed in the center of rotation of the gear body 8 which is a cylindrical shaft center, whereby the gear polishing tool 4 is formed into a circular ring shape as a whole. ing. The tool side support mechanism 29 rotates the gear polishing tool 4 in the circumferential direction of the annular shape of the gear polishing tool 4. Details will be described later.

  When the gear polishing tool 4 meshes with the workpiece gear 2, the polishing side surface 7 a of the tooth portion 7 contacts the tooth surface 3 a of the tooth 3 of the workpiece gear 2. Incidentally, while the gear polishing tool 4 is rotating about its own axis as the rotation axis S2, the polishing side surface 7a of the tooth portion 7 of the gear polishing tool 4 is the tooth of the tooth 3 of the gear 2 to be processed. The tooth 3 is brought into contact with the surface 3a and is fed in the direction in which the tooth 3 that forms the spiral shape of the gear polishing tool 4 travels.

  A plurality of arc-shaped polishing sheets 9 are sequentially attached to at least the polishing side surface 7 a of the tooth portion 7, and the polishing side surface 7 a is covered with the polishing sheet 9 over the entire spiral forming direction of the tooth portion 7.

  The tool-side support mechanism 29 rotates the gear polishing tool 4 in the circumferential direction of the annular shape with the shaft center of the gear polishing tool 4 as the rotation axis S2. Specifically, the tool-side support mechanism 29 uses a motor (power source) 31 in which an output shaft (drive shaft) 31a is rotatably arranged on the rotation axis S2, and a gear polishing tool 4 as a motor. And a fixture 33 to be attached to the output shaft 31a.

  The attachment 33 holds and holds the gear polishing tool 4 from both end faces (both restricting surfaces) of the rotation axis S2 and is attached and fixed so as to rotate integrally with the output shaft 31a. It is composed of

  The holding member 34 on the side close to the drive shaft 31a is a disk-like and flange-like attached portion 37 that is attached and fixed to the distal end portion of the drive shaft 31a, and on the side away from the attached portion 37 to the drive shaft 31a. A shaft portion 38 is formed so as to project integrally and has the rotational axis S2 as an axis. The shaft portion 38 is formed in a cylindrical shape that can be fitted and inserted into the mounting hole 8 a of the gear body 8.

  On the other hand, the holding member 36 on the different side from the drive shaft 31a is formed in the same disk shape as the mounted portion 37 as viewed in the axial direction of the rotation axis S2, and the holding member 36 is formed on the holding member 34 side. It has a convex portion 36a that protrudes integrally and is fitted and inserted into the mounting hole 8a.

  The shaft portion 38 of the holding member 34 and the convex portion 36a of the holding member 36 are fitted and inserted from the open ends on both sides of the mounting hole 8a, and the pair of holding members 34 and 36 are fastened and fixed to each other by bolts 39. As a result, the gear polishing tool 4 is clamped and fixed between the attached portion 37 of the holding member 34 and the holding member 36, whereby the gear polishing tool 4 is mounted so as to rotate integrally with the drive shaft 31 a. It becomes a state.

  Incidentally, concave portions 4a and 37a are formed on the opposed surfaces of the mounted portion 37 and the gear-shaped main body 8 so that the spaces are connected to each other, and the regulating pin is formed in the space formed by the upper and lower concave portions 4a and 37a. 41 is fitted and accommodated, and the restriction pin 41 restricts (specifically prohibits) relative rotation of the gear polishing tool 4 with respect to the fixture 33.

  FIGS. 12A and 12B are a cross-sectional view and an exploded cross-sectional view, respectively, showing the mounting structure of the abrasive sheet. The polishing sheet 9 is attached to the attached sheet piece 42 fixedly attached to the polishing side 7a side of the tooth portion 7 and the surface of the attached sheet piece 42 (the surface opposite to the polishing side 7a). The attachment sheet piece 43 is attached to the surface of the attachment sheet piece 43 (the surface opposite to the attachment sheet piece 42).

  The attached sheet piece 42 is made of a material that can be elastically deformed flexibly, and is fixed to the polished side surface 7a of the tooth portion 7 by an adhesive or a double-sided tape. When sticking using an adhesive, the adhesive is applied to one or both of the polished side surface 7a and the back surface of the attached sheet piece 42, and then the attached sheet piece 42 is attached to the surface of the polished side surface 7a.

  A surface fastener (velvet fastener) 42a is integrally formed on the surface of the sheet piece 42 to be attached, which is an engaging portion with which the attachment sheet piece 43 is engaged in a surface-like manner.

  The mounting sheet piece 43 is made of a material that can be elastically deformed flexibly. A hook and loop fastener (velvet fastener) 43a is integrally formed on the back surface of the mounting sheet piece 43, which is an engaging portion that is detachably engaged with the hook and loop fastener 42a of the attached sheet piece 42.

  In other words, one of the attached sheet piece 42 and the attached sheet piece 43 (in this example, the attached sheet piece 42) is formed with a male surface fastener 42a, and the other (in this example, the attachment sheet piece 42). The piece 43) is formed with a female surface fastener 43a, and the two sheet pieces 42 and 43 are detachably engaged.

  The applied sheet piece 44 is attached and fixed to the surface of the attachment sheet piece 43 with an adhesive, a double-sided tape, or the like. When sticking using an adhesive, the adhesive is applied to one or both of the front surface of the attachment sheet piece 43 and the back surface of the application-side sheet piece 44, and then the application-side sheet piece 44 is attached to the attachment sheet piece 43. Affix to the surface.

  The applied sheet piece 44 is made of a material that has flexibility and elasticity, such as nylon, cloth, film, and metal foil, and can be changed flexibly.

  A polishing portion (polishing layer) 16 is formed on the surface of the coated sheet piece 44 by attaching fine abrasive grains by adhesion or the like, or by electrically flocking a thread pile containing the abrasive grains. Yes. By this polishing part 16, the tooth surface 3a of the gear 2 to be processed is polished. The operation of forming the polishing portion 16 may be performed in advance before the application-side sheet piece 44 is attached to the attachment sheet piece 43, or may be performed after being attached.

  In the illustrated example, an example in which the polishing sheet 9 is attached only to one polishing side surface 7a of the tooth portion 7 has been described. However, as shown by a virtual line L in FIG. The polishing sheet 9 may be affixed to a surface (non-polished side surface) 7b opposite to the rotational direction of 7a. Incidentally, the non-polishing side surface 7b becomes the polishing side surface 7a when the gear polishing tool 4 rotates in the reverse direction.

  According to the polishing apparatus 1 having such a configuration, the mounting sheet piece 43 and the added side sheet piece 44 can be easily exchanged in the polishing operation by the rotation of the gear 2 and the gear polishing tool 4 or the synchronous rotation drive. , Maintenance and convenience are improved.

  Next, based on FIG. 13, a different part from the above-mentioned thing about the modification of the polishing sheet 9 shown to FIG. 9 thru | or FIG. 12 is demonstrated.

  FIG. 13 is a cross-sectional view illustrating a configuration of a modified example of the polishing sheet 9 illustrated in FIGS. 9 to 12. In the polishing sheet 9 shown in the figure, the polishing section 16 is formed on the surface of the attachment sheet piece 43 by the same means as described above, and the application-side sheet piece 44 is omitted.

  Next, a different part from the above-mentioned thing is demonstrated about the modification of the grinding | polishing apparatus 1 based on FIG.

  In the above-described example, the example in which the fixture 33 is configured by the pair of holding members 34 and 36 has been described. However, in the example illustrated in FIG. 14, the fixture 33 is configured only by the holding member 34 on the drive shaft 31a side. ing. Then, with the shaft portion 38 fitted and inserted into the mounting hole 8a of the gear polishing tool 4, a bolt 46 is inserted into the mounted portion 34 and the gear polishing tool 4 and tightened, thereby tightening the gear polishing tool. 4 is fixedly attached to the drive shaft 31a.

1 Polishing device 2 Workpiece gear (workpiece)
3a tooth surface 7 tooth portion 7a polishing side surface 8 gear-shaped main body 9 polishing sheet 11 deformation sheet piece (deformation sheet)
12 Machined gear side sheet piece (machined gear side sheet)
16 Polishing part (polishing layer)
19 Protective sheet 22 Protective cover

Claims (5)

A gear polishing tool for polishing a tooth surface of a work gear,
A gear-shaped main body formed into a gear shape having a tooth portion meshing with a workpiece gear;
A polishing sheet that is formed separately from the gear-shaped main body and is affixed to the polishing side surface of the tooth portion;
The polishing sheet is attached to the deformation sheet piece to be attached to the polishing side surface, and to the surface of the deformation sheet piece on the opposite side of the gear-shaped main body, and the gear to be processed is engaged with the processing gear. And a gear side sheet piece to be processed in contact with the tooth surface of
The deformation sheet piece is configured to be elastically deformable,
A gear polishing tool, wherein a polishing portion including abrasive grains is formed on an outer surface of the gear side sheet piece to be processed, which is a surface opposite to the deformation sheet piece. The gear polishing tool according to claim 1, wherein the polishing portion is formed on the outer surface by loose abrasive particles for lapping polishing that are movably attached to the outer surface of the gear-side sheet piece to be processed. The gear polishing tool according to claim 1, wherein the polishing portion is integrally formed on the outer surface by fixed abrasive grains fixedly attached to the outer surface of the processed gear side sheet piece. A polishing sheet affixed to the gear-shaped body of the gear polishing tool,
A deformed sheet piece to be affixed to the polished side surface of the gear-shaped body of the gear-shaped body so as to have a gear portion meshing with the workpiece gear;
A processed gear-side sheet piece that is affixed to the surface of the deformation sheet piece opposite to the gear-shaped main body side and that contacts the tooth surface of the processed gear when engaged with the processed gear;
The deformation sheet piece is configured to be elastically deformable,
A polishing sheet comprising a polishing part including abrasive grains formed on an outer surface of the polishing side sheet piece opposite to the deformed sheet piece side. A protective sheet that covers and protects a pre-formed adhesive layer on the side of the deformable sheet piece in contact with the polishing side surface before being attached to the polishing side surface of the tooth portion;
The polishing sheet according to claim 4, further comprising a protective cover that covers and protects the polishing portion in a state before polishing.

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