JP2015009245A - Manufacturing method for geared member and geared member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method that obtains a geared member of high dimensional accuracy without changing production facilities, and to provide a geared member.SOLUTION: A manufacturing method for a geared member W comprising an internal gear 24 having a toric body part 24a and a gear tooth 24b and a clutch hub 44 with which one end of the body part 24a is joined comprises the preparation process of forming a toric projection part 24c at one end of the body part 24a and providing a toric diameter expansion suppressor 24d extending from the body part 24a to the radial outer peripheral side in a part in a vicinity of one end of the body part 24a, the positioning process of positioning the projection part 24c so as to come in contact with a prescribed part of the clutch hub 44, and the welding process of pressing the other end of the body part 24a and the clutch hub 44 with a pair of electrodes 51, 52 for electric conduction to make projection weld, so that the thermal expansion of the internal gear 24 in the diameter expansion direction is suppressed by the diameter expansion suppressor 24d.

Description

  The present invention relates to a geared member manufacturing method including a gear member and an annular member, and more particularly to a geared member capable of suppressing thermal expansion in the diameter expansion direction of the gear member during projection welding. The present invention relates to a method and a geared member.

  Conventionally, a plurality of planetary gear mechanisms (also referred to as planetary gear sets) and drum-like multi-plate clutches are used in automatic transmissions. The planetary gear mechanism includes a plurality of rotating elements such as a sun gear, an internal gear (also referred to as a ring gear), a pinion gear, and a carrier. In the case of a layout in which a planetary gear mechanism is disposed adjacent to a clutch formed of steel plate material, a geared member in which an internal gear is integrally connected to a clutch hub for the main purpose of making the transmission mechanism compact. Is often adopted.

Generally, the clutch hub is an annular plate member obtained by pressing a steel plate material. Therefore, when the clutch hub and the internal gear are joined, general-purpose spot welding is not easy, and the electron beam welding may increase the production cost in terms of equipment and the like.
Although the joining method of Patent Document 1 is not joining of the clutch hub and the internal gear, a rib for welding is formed on the flange portion of the cylindrical cap, and the welding is performed on the hollow disk-like plate. In professional welding, a protrusion is formed on one member and energized while pressing this protrusion against the other member, so that a part of the protrusion is melted to form a weld nugget and the two come into contact with each other. The parts are joined.

Since the welded structure is affected by heat from the melted portion, the dimensional accuracy is reduced due to heat distortion or the like, and there is a risk that the generation of gear noise and durability will be reduced.
In the joining method of Patent Document 2, when projecting the internal gear onto the plate portion, a collet is prepared in which the diameter of the axially welded portion is smaller than the diameter of the portion opposite to the axially welded side. The plate portion and the internal gear are subjected to professional welding by a pair of electrodes with the gear fitted on the collet. This is because during welding energization, the welding side and the non-welding side of the internal gear are hot, so the diameter is increased as a whole, and in the process of gradually cooling after the welding is completed, the welding of the expanded internal gear is performed. Since the welded plate portion suppresses the radial contraction of the side, the diameter remains in the expanded state, while the anti-weld side gradually contracts, resulting in a shape with different diameters on the weld side and the anti-weld side. It is intended to prevent. In other words, in this joining method, the internal gear is deformed in advance by a collet that expands the diameter of the end of the gear part opposite to the welding side from the end of the gear part on the welding side, before the heat generated by welding. Yes.

JP 11-179558 A JP 2009-50896 A

In the joining method of Patent Document 2, considering the thermal expansion at the time of welding, the inner diameter difference between the welded side of the internal gear and the welded side caused by the springback due to the forced deformation before the heat generated by welding. Therefore, the dimensional accuracy of the member can be ensured.
However, this joining method has the following problems in terms of productivity and merchantability.
1stly, in the joining method of patent document 2, exclusive jigs, such as a collet, are required for every kind of internal gear other than the welding equipment provided with one pair of electrodes, and there exists a possibility that production cost may increase. .
Secondly, in this joining method, the diameter of the opposite side of the weld, which is less affected by the heat of the internal gear, is forcibly expanded, so that damage such as microcracks may occur in the gear trough and the merchantability may be reduced. is there.

  The object of the present invention is to manufacture a geared member that can suppress the diameter of the welded portion from becoming larger than that of the anti-welded portion without changing the production equipment and can obtain a geared member with high dimensional accuracy. It is to provide a method and a geared member.

  According to a first aspect of the present invention, there is provided a geared member manufacturing method in which a gear member having an annular main body portion and gear teeth provided on an inner peripheral portion of the main body portion are joined to one end portion in the axial direction of the main body portion. In the manufacturing method of the geared member provided with the annular member formed, a protrusion projecting in an annular shape is formed at one axial end portion of the main body portion, and in the vicinity of one axial end portion of the main body portion A preparation step of providing an annular diameter-increasing suppressing portion extending from the main body portion to the radially inner peripheral side or the outer peripheral side at the portion, and a positioning step of positioning the projection portion so as to contact a predetermined portion of the annular member; A welding step in which the other end portion in the axial direction of the main body portion and the annular member are pressed and energized with a pair of electrodes to perform projection welding, and the diameter expansion direction of the gear member at the time of projection welding The thermal expansion of the It is characterized in that to suppress.

  In the manufacturing method of the geared member according to the first aspect, the annular diameter expansion suppressing portion extending from the main body portion to the radially inner peripheral side or the outer peripheral side is provided in the vicinity of the one axial end portion of the main body portion. The diameter-enlargement suppression portion, which is the structure on the gear member side, can suppress thermal expansion in the diameter-enlargement direction of the main body portion of the gear member during welding, and performs forced deformation and forced deformation of the gear member before welding. This eliminates the need for a dedicated jig.

According to a second aspect of the present invention, in the first aspect of the invention, the electrode that presses the other axial end of the main body portion is an annular electrode, and the diameter expansion suppressing portion is the annular shape used for the projection welding. It is characterized by projecting radially inward or outward from the electrode.
According to a third aspect of the present invention, in the first or second aspect of the present invention, the annular member is formed of a steel plate material and has an axial wall formed with a shaft hole, and the axial center from the outer peripheral end of the annular wall portion. A clutch hub having a cylindrical portion extending in parallel with the direction, wherein the gear member is an internal gear.

  According to a fourth aspect of the present invention, there is provided a geared member having an annular main body portion, gear teeth provided on an inner peripheral portion of the main body portion, and a projecting portion protruding in an annular shape at one end portion in the axial direction of the main body portion. A geared member including a gear member and an annular member on which the projection is projected and welded using an annular electrode, and is radially inward from the main body portion at a position near one axial end portion of the main body portion. An annular diameter expansion suppressing portion extending to the circumferential side or the outer circumferential side is provided, and the diameter expansion suppressing portion projects to the radially inner circumferential side or the outer circumferential side from the annular electrode used for the projection welding, and the projection The thermal expansion in the diameter expansion direction of the gear member during welding is suppressed by the diameter expansion suppression portion.

  According to the first aspect of the present invention, the diameter expansion suppressing portion which is a structural portion on the gear member side can suppress the thermal expansion in the diameter expanding direction of the main body portion of the gear member during welding, and the gear member before welding Since it is possible to eliminate the need for forced deformation and a dedicated jig for performing forced deformation, it is possible to obtain a highly geared member while suppressing production costs.

According to invention of Claim 2, since the expansion suppression part has protruded to the radial direction inner peripheral side or outer peripheral side rather than the annular electrode used for projection welding, the thermal influence at the time of the welding to a diameter expansion suppression part is carried out. This can be further reduced, and the dimensional accuracy of the geared member can be further increased.
According to the invention of claim 3, the productivity and merchantability of the geared member in which the internal gear is integrally connected to the clutch hub can be increased.

  According to invention of Claim 4, a diameter expansion suppression part can suppress the thermal expansion of the diameter expansion direction of the gear member at the time of welding, and is exclusive for the forced deformation and forced deformation of the gear member before welding. Therefore, the geared member with high dimensional accuracy can be obtained without changing the production equipment.

It is a fragmentary longitudinal cross-sectional view of the automatic transmission which incorporated the geared member which concerns on Example 1 of this invention. It is a perspective view of an internal gear and a clutch bubble. It is a longitudinal cross-sectional view of a projection welding apparatus. It is a principal part longitudinal cross-sectional view which shows the contact state of the internal gear at the time of a positioning process, and a clutch bubble. It is a conceptual diagram which shows the electricity supply path | route of a welding current. FIG. 6 is a diagram corresponding to FIG. 5 according to the second embodiment. FIG. 6 is a diagram corresponding to FIG. 5 according to the third embodiment.

  Hereinafter, modes for carrying out the present invention will be described based on examples. In the figure, the upper direction is the upper side, the lower side direction is the lower side, the left side direction is the left side, and the right side direction is the right side.

Embodiment 1 of the present invention will be described below with reference to FIGS.
In the first embodiment, a geared member W that includes an internal gear 24 (gear member) and a clutch hub 44 (annular member) and is built in the automatic transmission 1 will be described as an example.
In addition, the following description includes description of the manufacturing method of the member W with a gear.

First, the automatic transmission 1 incorporating the geared member W will be described.
As shown in FIG. 1, the automatic transmission 1 includes a torque converter (not shown) attached to an output shaft of an engine (not shown) arranged on the right side, and an output rotation of the engine via the torque converter. Is provided.
The speed change mechanism 2 includes first, second, and third planetary gear sets (hereinafter abbreviated as PGS) 10, 20, and 30 as components of a power transmission path, and first and second clutches as frictional engagement elements (whichever And the first, second and third brakes 41, 42, 43 and the like.

  The first PGS 10 and the second PGS 20 are single pinion PGSs, and the third PGS 30 is a double pinion PGS. Each PGS 10, 20, 30 includes sun gears 11, 21, 31, pinions 12, 22, 32 that mesh with the sun gears 11, 21, 31, respectively, and carriers 13, 23, 32 that support the pinions 12, 22, 32, respectively. 33 and internal gears 14, 24, and 34 that mesh with the pinions 12, 22, and 32, respectively.

The first and second clutches are arranged between the torque converter and the first PGS 10 side by side in the radial direction, and the first, second, and third brakes 41, 42, and 43 are shafts so as to be separated from the engine side. Arranged in order on the left side of the direction.
In the first brake 41, a plurality of friction plates 41 a are alternately splined to a hub portion 14 f formed on the internal gear 14 and an end cover 6 a of the case 6.
In the second brake 42, a plurality of friction plates 42 a are alternately splined to a hub portion 44 d formed on the clutch hub 44 and an end cover 6 a of the case 6.
In the third brake 43, a plurality of friction plates 43 a are alternately splined to a hub portion 33 a formed on the carrier 33 and an end cover 6 a of the case 6.

  The sun gear 11 of the first PGS 10 and the sun gear 21 of the second PGS 20 are connected, the internal gear 14 of the first PGS 10 and the carrier 23 of the second PGS 20 are connected, the internal gear 24 of the second PGS 20 and the internal gear 34 of the third PGS 30 Are connected. The output rotation of the engine is caused by the first path directly input from the input shaft 3 to the sun gear 31 of the third PGS 30 and the output member 4 connected from the input shaft 3 to the first clutch to the sun gear 11 and the second PGS 20 of the first PGS 10. It is transmitted by the second path input to the sun gear 21 and the third path input from the input shaft 3 to the carrier 23 of the second PGS 20 via the output member 5 connected to the second clutch.

Next, the geared member W will be described.
As shown in FIGS. 1 to 4, the geared member W is formed by projection welding the internal gear 24 and the clutch hub 44.
As shown in FIGS. 2 and 4, the internal gear 24 includes an annular main body 24a and gear teeth 24b provided on the inner peripheral portion of the main body 24a before the projection welding. Molded. The main body 24a has a wedge-shaped projection 24c projecting in an annular shape at the left end in the axial direction on the joining side, and an annular shape extending from the main body 24a to the outer circumferential side in the vicinity of the left end in the axial direction. A pair of chamfered portions 24e are provided on the inner periphery and the outer periphery of the diameter expansion suppressing portion 24d and the axially right end on the anti-joining side.

As shown in FIG. 2, the clutch hub 44 is integrally formed by pressing a steel plate material before the projection welding. The clutch hub 44 includes an annular wall portion 44a in which a shaft hole 44c is formed, a cylindrical portion 44b extending from the outer peripheral end of the annular wall portion 44a to the left side in parallel with the axial direction, and the like. On the outer peripheral portion of the cylindrical portion 44b, a hub portion 44d is provided in which the plurality of friction plates 42a are alternately splined.
The projection 24c of the internal gear 24 is welded to the right side surface of the annular wall 44a of the clutch hub 44 by projection welding, which is a type of capacitor resistance welding.

Next, the welding process will be described.
As shown in FIG. 3, in the welding process, the clutch hub 44 and the internal gear 24 are joined using a projection welding device 50. The projection welding apparatus 50 includes a fixed electrode 51 (annular electrode) fixed to a base 53, a movable electrode 52 that can be moved up and down by a cylinder mechanism 54, and the like.

  The fixed electrode 51 is formed in a cylindrical shape having a cavity at the center. The upper end of the fixed electrode 51 is formed in a flat shape so as to be able to come into surface contact with the end portion on the opposite side of the main body 24a. The inner diameter of the fixed electrode 51 is set to be smaller than the outer diameter of the gear tooth 24b and larger than the inner diameter of the gear tooth 24b, and the outer diameter of the fixed electrode 51 is larger than the inner diameter of the diameter expansion suppressing portion 24d and suppressed from expanding. It is set smaller than the outer diameter of the portion 24d.

On the base 53, a fixed electrode 51, a positioning member 55 for positioning the welding position of the internal gear 24, and a positioning member 56 for positioning the welding position of the clutch hub 44 have a plurality of bolts 59. It is fixed concentrically.
The positioning member 55 is formed in a disc shape, and has an outer diameter substantially the same as the inner diameter of the gear teeth 24b. The positioning member 56 is formed in a cylindrical shape, and has an inner diameter that is substantially the same as the outer diameter of the hub portion 44d. The vertical length (axial length) of the positioning member 56 is set to be larger than the total length of the vertical length of the fixed electrode 51 and the vertical length of the internal gear 24.

  The movable electrode 52 is formed in a cylindrical shape having a cavity in the center, and is disposed concentrically with the fixed electrode 51 at a position facing the protrusion 24c (see FIGS. 4 and 5) with the clutch hub 44 therebetween. Yes. The lower end of the movable electrode 52 is formed in a flat shape and is configured to be able to come into surface contact with the anti-joining side end wall portion of the annular wall portion 44a. The cylinder mechanism 54 raises the movable electrode 52 away from the fixed electrode 51 by shortening the rod, and lowers the movable electrode 52 closer to the fixed electrode 51 by extending the rod.

Next, the procedure of the welding process will be described.
First, the internal gear 24 is set on the projection welding device 50. At this time, with the protrusion 24c facing upward, the inner diameter of the gear tooth 24b is fitted to the outer peripheral edge portion of the positioning member 55, and the upper end of the fixed electrode 51 and the opposite end of the main body 24a are in surface contact. Thus, the internal gear 24 is positioned. The movable electrode 52 is retracted to an initial position spaced upward from the fixed electrode 51.

  Next, as shown in FIGS. 3 and 4, the clutch hub 44 is set in the projection welding apparatus 50. At this time, the outer diameter of the hub portion 44d is fitted into the inner peripheral edge portion of the positioning member 56 so that the joint side end wall portion of the annular wall portion 44a and the top portion of the projection portion 24c are in contact with each other in a substantially circular line shape. The hub 44 is positioned.

  Next, the cylinder mechanism 54 is driven to extend, and after the lower end of the movable electrode 52 comes into surface contact with the end wall portion on the opposite side of the annular wall portion 44a, a predetermined bonding load (for example, a pressure applied to both of them is set in advance). The movable electrode 52 is driven downward until 3t). A predetermined direct current (for example, 170 kA) is supplied for a predetermined time (for example, 30 msec) in a state where a predetermined bonding load is applied between the internal gear 24 (protrusion 24c) and the clutch hub 44 (annular wall 44a), Both are projection welded.

As shown in FIG. 5, when a current is supplied, the energized current is concentrated on the top of the protrusion 24c, and the vicinity of a part of the annular wall 44a where the top of the protrusion 24c is in contact with the top of the protrusion 24c. Are heated and melted to form a weld nugget, whereby both are firmly joined.
After the joining is completed, the energization is stopped and the cylinder mechanism 54 is shortened to move the movable electrode 52 to the initial position, thereby completing the projection welding process.

At the time of current supply, the current energization path P flows in a region formed by the top of the protrusion 24c and the lower ends of the pair of chamfers 24e of the main body 24a, so that the current is closer to the top of the protrusion 24c. The density increases, and the amount of heat generation increases as it approaches the top of the protrusion 24c.
As described above, when the thermal expansion of the main body portion 24a is not restricted at all, the thermal expansion amount of the internal gear 24 also increases as it approaches the top of the projection 24c.

  In the present embodiment, an annular diameter expansion suppressing portion 24d is provided over the entire circumference in the vicinity of the protruding portion 24c of the internal gear 24. Since this diameter expansion suppressing portion 24d has a large separation distance from the energization path P and is not easily affected by heat generated during welding, it is possible to restrict the thermal expansion in the diameter expansion direction by the main body portion 24a from the outer peripheral side. Thereby, the internal gear 24 and the clutch hub 44 are projection welded in a state where the thermal expansion of the main body 24a is suppressed. In addition, although thermal expansion also occurs in the vicinity of the end of the main body 24a on the side opposite to the weld, the shape and dimensions before welding are restored after the end of welding, so that no gear noise is generated due to the deformation of the gear teeth 24b.

Next, operations and effects of the method for manufacturing the geared member W according to the first embodiment will be described.
According to the method for manufacturing the geared member W, the diameter expansion suppressing portion 24d which is a structural portion on the internal gear 24 side suppresses thermal expansion in the diameter expansion direction of the main body portion 24a of the internal gear 24 during welding. Since the internal gear 24 before welding can be forcibly deformed and a dedicated jig for performing the forced deformation can be eliminated, the geared member W with high merchantability can be obtained while suppressing the production cost. .

The electrode that presses the anti-joining side end of the main body portion 24a is the fixed electrode 51, and the diameter expansion suppressing portion 24d protrudes more radially outward than the fixed electrode 51 used for projection welding. The influence of heat at the time of welding to 24d can be further reduced, and the dimensional accuracy of the geared member W can be further increased.
A clutch hub having an annular member formed of a steel plate and having an annular wall portion 44a in which a shaft hole 44c is formed and a cylindrical portion 44b extending parallel to the axial direction from the outer peripheral end of the annular wall portion 44a. 44, and the gear member is the internal gear 24. Therefore, the productivity and merchantability of the geared member W in which the internal gear 24 is integrally connected to the clutch hub 44 can be increased.

  The geared member W includes an annular main body 24a, gear teeth 24b provided on the inner peripheral portion of the main body 24a, and a projecting portion 24c projecting in an annular shape at one end in the axial direction of the main body 24a. In the geared member W including the internal gear 24 and the clutch hub 44 to which the projection 24c is projection welded using the fixed electrode 51, the main body 24a is located near one end in the axial direction of the main body 24a. Is provided with an annular diameter-increasing suppressing portion 24d extending to the outer peripheral side, and the diameter-increasing suppressing portion 24d protrudes more radially outward than the fixed electrode 51 used for projection welding, and an internal gear at the time of projection welding. The thermal expansion in the diameter expansion direction of 24 is suppressed by the diameter expansion suppressing portion 24d. Thereby, the diameter expansion suppression part 24d can suppress the thermal expansion in the diameter expansion direction of the gear internal gear 24 member during welding, for forced deformation and forced deformation of the internal gear 24 before welding. Therefore, the geared member W with high dimensional accuracy can be obtained without changing the production equipment.

Next, a manufacturing method of the geared member WA according to the second embodiment will be described with reference to FIG.
Only the configuration different from that of the first embodiment will be described, and the same members as those of the first embodiment are denoted by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 6, the geared member WA is formed by projection welding the internal gear 14 and the carrier 13.
The internal gear 14 is integrally formed with an annular main body portion 14a and gear teeth 14b provided on the inner peripheral portion of the main body portion 24a. The main body portion 14a has an annular cross-section protruding portion 14c projecting in an annular shape from the upper end portion on the joining side, and an annular diameter expansion suppression extending from the main body portion 14a to the radially outer peripheral side from the middle step portion to the upper end portion. A portion 14d, a pair of chamfered portions 14e on the inner periphery and outer periphery of the lower end portion on the anti-joining side, and a hub portion 14f provided on the outer peripheral portion of the diameter expansion suppressing portion 14d are provided.

  The carrier 13 is formed by pressing a steel plate material. The projection 14c of the internal gear 14 is welded to the lower surface of the carrier 13 by projection welding. As a result, the diameter expansion suppressing portion 14d of the internal gear 14 has a large separation distance from the energization path P1 and is not easily affected by the heat generated during welding. Therefore, the thermal expansion in the diameter expansion direction by the main body portion 14a is tightened from the outer peripheral side. Can be regulated. Further, since the hub portion 14f can be formed using the diameter expansion suppressing portion 14d, the geared member WA can be reduced in size.

Next, a manufacturing method of the geared member WB according to the third embodiment will be described with reference to FIG.
Only the configuration different from that of the first embodiment will be described, and the same members as those of the first embodiment are denoted by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 7, the geared member WB is formed by projection welding the internal gear 24A and the clutch hub 44.
The internal gear 24A is integrally formed with an annular main body portion 24a and gear teeth 24f provided on the inner peripheral portion of the main body portion 24a. The main body 24a includes a protrusion 24c having a wedge-shaped cross section that protrudes in an annular shape from the upper end on the joining side, and an annular diameter expansion suppressing portion 24g that extends from the main body 24a to the radially inner peripheral side in the vicinity of the upper end. And a pair of chamfered portions 24e formed on the inner periphery and the outer periphery of the lower end on the anti-joining side.

  The inner edge portion of the diameter expansion suppressing portion 24g is formed so as to protrude radially inward from the inner diameter of the fixed electrode 51. Accordingly, the diameter expansion suppressing portion 24g of the internal gear 24 has a large separation distance from the energization path P and is not easily affected by heat generated during welding. Therefore, the thermal expansion in the diameter expansion direction by the main body portion 24a is caused from the inner peripheral side. The tension can be regulated.

Next, a modification in which the above embodiment is partially changed will be described.
1) In the above-described embodiment, an example of a geared member including an internal gear and a clutch hub and a geared member including an internal gear and a carrier has been described. However, the application member is not limited to these, Any combination is acceptable as long as both are adjacent and can be projection welded.

2] In the above-described embodiment, the example in which the hub portion is formed by using the expansion suppressing portion has been described. However, the gear teeth may be formed by using the expansion suppressing portion, and other functions are added. It is also possible.
3) In addition, those skilled in the art can implement the present invention by adding various modifications to the embodiments without departing from the spirit of the present invention, and the present invention includes such modifications. is there.

The present invention provides a geared member having a high dimensional accuracy without changing production equipment in a geared member manufacturing method and a geared member including a gear member and an annular member.

W, WA, WB Geared member 14 (first PGS) Internal gear 14a Main body portion 14b Gear tooth 14c Protruding portion 14d Diameter expansion suppressing portion 23 Carrier 24 (Second PGS) Internal gear 24a Main body portion 24b, 24f Gear tooth 24c Protrusion Parts 24d, 24g diameter expansion suppressing part 44 clutch hub 44a annular wall part 44b cylindrical part 51 fixed electrode 52 movable electrode

Claims (4)

A geared member comprising: a gear member having an annular main body portion and gear teeth provided on an inner peripheral portion of the main body portion; and an annular member in which one end portion in the axial direction of the main body portion is joined. In the manufacturing method of
A circular protrusion projecting in an annular shape at one axial end portion of the main body portion, and extending from the main body portion toward the radially inner peripheral side or outer peripheral side in the vicinity of one axial end portion of the main body portion A preparation step of providing an annular expansion suppression portion;
A positioning step of positioning the protruding portion so as to contact a predetermined portion of the annular member;
A welding step in which the other end in the axial direction of the main body and the annular member are pressed and energized with a pair of electrodes to perform projection welding,
A method for manufacturing a geared member, characterized in that thermal expansion in the diameter expansion direction of the gear member during the projection welding is suppressed by the diameter expansion suppressing portion. The electrode that presses the other axial end of the main body is an annular electrode,
2. The method for manufacturing a geared member according to claim 1, wherein the diameter-enlargement suppressing portion projects toward an inner peripheral side or an outer peripheral side in the radial direction with respect to the annular electrode used for the projection welding. The annular member is a clutch hub including an annular wall portion formed of a steel plate material and formed with a shaft hole, and a cylindrical portion extending in parallel with the axial direction from an outer peripheral end of the annular wall portion. ,
The method for manufacturing a geared member according to claim 1, wherein the gear member is an internal gear. Using an annular electrode, a gear member having an annular main body, gear teeth provided on an inner peripheral portion of the main body, and a projecting portion protruding in an annular shape at one end in the axial direction of the main body In the geared member provided with an annular member to which the projection is projection welded,
An annular diameter expansion suppressing portion extending from the main body portion toward the radially inner peripheral side or outer peripheral side in the vicinity of one axial end portion of the main body portion is provided,
The diameter expansion suppressing portion projects to the radially inner or outer peripheral side from the annular electrode used for the projection welding,
A geared member, wherein thermal expansion in the diameter expansion direction of the gear member at the time of projection welding is suppressed by the diameter expansion suppressing portion.