JP4541254B2 - Brazing material and brazing method - Google Patents

Description

  The present invention relates to a brazing material and a brazing method used in assembling a turbine runner.

  A torque converter is known as a component that constitutes an automatic transmission mounted on a passenger car. This torque converter is composed of a turbine runner or the like, and the turbine runner is manufactured by brazing many plate-shaped blades to a bowl-shaped shell and a ring-shaped inner core. A large number of slits (elongated holes) are formed in the shell and the inner core, and protrusions inserted into the large number of slits are formed on the blade.

When brazing, a blade projection is inserted into the slits of the shell and the inner core and bent, and a brazing material is disposed in the vicinity of the bent projection and the whole is heated. By this heating, the brazing material is melted and the projections are joined to the shell and the inner core, so that the blade is joined to the shell and the inner core. As a technique for heating the turbine runner during brazing, a technique using a heating apparatus including a heating furnace, a halogen lamp, an induction heating coil, or the like is known (for example, see Patent Document 1).
JP 2004-176166 A

  However, in the above-described brazing, the brazing material may be displaced from a predetermined position (positional displacement) due to vibration during conveyance, vibration of a brazing device, or electromagnetic force. When the brazing material deviates from a predetermined position in this manner, brazing accumulates in a portion of the blade that does not require brazing, and a phenomenon in which there is no brazing material in the portion to be joined with the brazing material (brazing) occurs.

  In view of the above circumstances, an object of the present invention is to provide a brazing material and a brazing method capable of preventing the above-described brazing.

To achieve the above object, the brazing material of the present invention is a bowl having an opening formed in the center, and a shell having a plurality of slits formed at predetermined intervals on the outer peripheral edge and the inner peripheral edge, A ring-shaped member disposed between the outer peripheral edge portion and the inner peripheral edge portion of the shell, wherein a slit facing the slit of the outer peripheral edge portion of the shell is formed in the outer peripheral edge portion, and the inner peripheral edge of the shell An inner core in which a slit facing the slit of the part is formed on the inner peripheral edge thereof, and a space from between the outer peripheral edge portions of both the shell and the inner core to the inner peripheral edge portions of both the shell and the inner core The blade of the turbine runner provided with protrusions that are inserted into the respective slits and bent and are bent to the shell and the inner core. In the brazing material to,
(1) an inner portion extending along the inner peripheral surface side portion of the slit formed in the outer peripheral edge of the shell;
(2) The projection of the blade includes an outer portion extending along a portion exposed on the outer peripheral surface of the shell.

Here, the brazing material is
(3) The inner portion is disposed along the inner peripheral surface side portion of the slit formed in the outer peripheral edge portion of the shell, and the outer portion is disposed on the outer peripheral surface of the shell among the protrusions of the blade. It is hooked on the outer peripheral edge of the shell so as to be arranged along the exposed portion.

In order to achieve the above object, the brazing method of the present invention is a bowl having an opening formed in the central portion, and a shell having a plurality of slits formed at predetermined intervals on the outer peripheral edge and the inner peripheral edge. A ring-shaped member disposed between the outer peripheral edge portion and the inner peripheral edge portion of the shell, the slit facing the slit of the outer peripheral edge portion of the shell is formed in the outer peripheral edge portion, and the inside of the shell An inner core having a slit facing the slit on the peripheral edge formed on the inner peripheral edge, and between the outer peripheral edge of both the shell and the inner core, and between the inner peripheral edge of both the shell and the inner core. The blade of a turbine runner provided with a blade formed in the space and having protrusions inserted into the slits and bent, is filtered into the shell and the inner core. In brazing process for attaching,
(4) An inner portion extending along the inner peripheral surface side portion of the slit formed in the outer peripheral edge of the shell, and an outer portion extending along a portion of the projection of the blade exposed on the outer peripheral surface of the shell. Use brazing material with
(5) The brazing material is brazed while being hooked on the outer peripheral edge of the shell.

  According to the present invention, an inner portion that extends along the inner peripheral surface side portion of the slit formed in the outer peripheral edge portion of the shell, and an outer portion that extends along the portion of the blade projection exposed on the outer peripheral surface of the shell. Since the brazing material provided with is hooked on the outer peripheral edge of the shell, the brazing material does not come off due to impact or the like, and brazing without brazing can be realized.

  The present invention has been realized in brazing when manufacturing a turbine runner.

  An example of the brazing material of the present invention and a turbine runner brazed by the brazing material will be described with reference to FIGS.

  FIG. 1 is a perspective view showing the position of a brazing material when brazing a turbine runner. FIG. 2 is a sectional view taken along line XX in FIG. FIG. 3 is a side view showing the blade. FIG. 4A is a perspective view showing a conventional brazing material, and FIG. 4B is a perspective view showing an example of the brazing material of the present invention. FIG. 5 is a partially enlarged view showing a turbine runner in which the brazing material of FIG.

  The turbine runner 70 includes a bowl-shaped shell 72 having an opening 72 a formed in the center, a ring-shaped inner core 74 disposed between the outer peripheral edge 72 b and the inner peripheral edge 72 c of the shell 72, and the shell 72. A plurality of blades 76 that extend in a space between the outer peripheral edge portion 72b of the inner core 74 and the inner peripheral edge portion 74c of the inner core 74 and the inner peripheral edge portion 74c of the inner core 74. It has. In FIG. 1, a part of the jig 12 on which the turbine runner 70 is placed protrudes from the opening 72 a of the shell 72. In FIG. 2, the jig 12 is not shown.

  A plurality of slits 72bs are formed at substantially equal intervals in the outer peripheral edge portion 72b of the shell 72, and a plurality of slits 72cs are also formed at substantially equal intervals in the inner peripheral edge portion 72c. In each figure, the projection 76a of the blade 76 is inserted into the slit 72bs of the shell 72 and bent, and the projection 76b of the blade 76 is inserted into the slit 72cs of the shell 72 and bent. The number of the plurality of slits 72bs is the same as the number (number of sheets) of the blades 76, and the number of the plurality of slits 72cs is also the same as the number (number of sheets) of the blades 76. As shown in FIG. 2, the shell 72 is formed with a ring-shaped (annular) bottom 72d that smoothly falls from the outer peripheral edge 72b and is lower than the outer peripheral edge 72b. A portion of the bottom portion 72d opposite to the outer peripheral edge portion 72b is higher than the lowest portion of the bottom portion 72d, and forms an inner peripheral edge portion 72c. A portion surrounded by the inner peripheral edge portion 72c (a portion inside the inner peripheral edge portion 72c) is an opening 72a.

  A slit 74bs is formed in a portion of the outer peripheral edge portion 74b of the inner core 74 facing the slits 72bs of the shell 72. Similarly, a slit 74cs is formed in a portion of the inner peripheral edge 74c of the inner core 74 facing the slits 72cs of the shell 72. In each figure, the projection 76c of the blade 76 is inserted into the slit 74bs of the inner core 74 and bent, and the projection 76d of the blade 76 is inserted into the slit 74cs of the inner core 74 and bent. The number of the plurality of slits 74bs is the same as the number (number of sheets) of the blades 76, and the number of the plurality of slits 74cs is also the same as the number (number of sheets) of the blades 76. As shown in FIG. 2, the inner core 74 is located above the bottom 72 d of the shell 72 and is connected to the shell 72 via a blade 76. The inner core 74 is disposed at a position where it is placed on the blade 76. Further, the inner core 74 is disposed at a position slightly lower than the outer peripheral edge portion 72b of the shell 72 and slightly higher than the inner peripheral edge portion 72c.

  As described above, the blade 76 is formed with protrusions 76a, 76b, 76c, and 76d that are inserted into the slits 72bs, 72cs, 74bs, and 74cs and bent as shown in FIG. Further, the blade 76 rises from the outer peripheral edge portion 72b, the inner peripheral edge portion 72c, and the bottom portion 72d by inserting the protrusions 76a, 76b, 76c, and 76d into the slits 72bs, 72cs, 74bs, and 74cs, In addition, they are arranged at equal intervals (equal angles) along the outer peripheral edge 72b of the shell 72 (along the inner peripheral edge 72c, or along the outer peripheral edge 74b and the inner peripheral edge 74c of the inner core 74). The blade 76 is present in a space that is sandwiched between the shell 72 and the inner core 74. For example, as shown by the protrusions 76e and 76f and the slits 72gs and 72hs, between the slit 72bs and the slit 72cs of the shell 72, the slits 72gs and 72hs, and although not shown, the slit 74bs of the inner core 74 and Slits similar to the slits 74bs and 74cs may be formed between the slits 74cs, and protrusions (similar to the protrusions 76a) inserted into the similar slits may be formed on the blade 76.

  The projection 76a inserted and bent into the slit 72bs of the shell 72 is joined to the outer peripheral surface 72e of the shell 72 by the brazing material 100 shown in FIG. Further, the projection 76c that is inserted and bent into the slit 74bs of the inner core 74 is joined to the inner peripheral surface (upper surface) 74d of the inner core 74 by the brazing material 110 shown in FIG.

  As shown in FIG. 5, the brazing material 100 includes an inner portion 100 a extending along the inner peripheral surface side portion of the slit 72 bs formed in the outer peripheral edge portion 72 b of the shell 72, and the shell 72 among the protrusions 76 a of the blade 76. It is formed of an outer portion 100b extending along a portion that is exposed and bent on the outer peripheral surface 72e, and a connecting portion 100c that connects the inner portion 100a and the outer portion 100b. The inner portion 100a is longer than the slits 72bs, and the outer portion 100b is slightly longer than one side of the projection 76a that is bent into a triangular shape. The outer portion 100b is in contact with one side of the projection 76a that is bent to have a triangular shape.

  The brazing material 100 is a rod-shaped material manufactured from copper (or a copper alloy), and the rear end portion (the portion close to the connection portion 100c) of the inner portion 100a is bent by about 90 ° by a wire rod processing machine. A part slightly ahead of the part is further bent by about 180 ° to produce a brazing material having the same shape (molding braze = preform). Thus, the connection part 100c is formed by bending twice.

  A brazing method for brazing the shell 72, the inner core 74, and the blade 76 will be described.

  In brazing, first, as shown in FIG. 5, the connecting portion 100 c of the brazing material 100 is hooked on the outer peripheral edge 72 b of the shell 72. In this case, the inner portion 100a of the brazing material 100 is placed on the blade 76, and the outer portion 100b is placed on one side of the projection 76a that has been bent into a triangular shape. Thereby, the brazing material 100 is stably held at one point and two sides on the outer peripheral edge portion 72 b of the shell 72 and is held at the boundary between the shell 72 and the blade 76. For this reason, even if the turbine runner 70 sways (vibrates) due to conveyance during brazing, the brazing material 100 hardly moves. Therefore, the phenomenon that the brazing material 100 does not exist in the portion to be joined by the brazing material 100 (wax cutting) is prevented.

  When the shell 72, the inner core 74, and the blade 76 are brazed with the brazing materials 100, 110 using a heating furnace, a halogen lamp, or a heating device equipped with an induction heating coil, it is shown in FIGS. As described above, the brazing material 100 is disposed in the vicinity of the slit 72bs formed in the outer peripheral edge portion 72b of the shell 72, and the brazing material 110 is disposed in the vicinity of the slit 74bs formed in the outer peripheral edge portion 74b of the inner core 74. Is done. No brazing material is disposed in the vicinity of the slit 72cs formed in the inner peripheral edge portion 72c of the shell 72 and in the vicinity of the slit 74cs formed in the inner peripheral edge portion 74c of the inner core 74.

  The brazing filler metal 100 is melted by heating the turbine runner 70 to a predetermined temperature using the above heating device, and the projection 76a that is inserted into the slit 72bs of the shell 72 and bent is joined to the outer peripheral edge 72b, The material 110 is also melted, and the projection 76c that is inserted into the slit 74bs of the inner core 74 and bent is joined to the outer peripheral edge 74b. On the other hand, in the slit 72cs of the inner peripheral edge 72c of the shell 72 where the brazing material is not disposed, the brazing material 100 melted at the outer peripheral edge 72b flows through the gap and boundary between the shell 72 and the blade 76 by capillarity. For this reason, the protrusion 76b inserted and bent into the slit 72cs is joined to the inner peripheral edge portion 72c by the brazing material 100. The brazing material 100 has a large amount (length) in order to join not only the protrusion 76a but also the protrusion 76b. In addition, the brazing material 110 melted at the outer peripheral edge portion 74b flows through the gap between the inner core 74 and the blade 76 by capillarity into the slit 74cs of the inner peripheral edge portion 74c of the inner core 74 where no brazing material is disposed. . For this reason, the protrusion 76d that is inserted into the slit 74cs and bent is joined to the inner peripheral edge 74c by the brazing material 110. The brazing material 110 has a length necessary for joining not only the protrusion 76c but also the protrusion 76d. Note that the lengths of the brazing materials 100 and 110, for example, 100a and 110a, are determined according to the brazing length, such as the gap between the parts to be brazed.

  As described above, the brazing material 100 is hooked on the outer peripheral edge portion 72b of the shell 72 by using the heating device, and the outer portion 100b of the brazing material 100 is disposed along the projection 76a and melted so as not to be broken. Brazing can be realized.

  With reference to FIGS. 6 and 7, another example of the brazing material of the present invention will be described.

  FIG. 6 is a perspective view showing another example of the brazing material of the present invention. FIG. 7 is a partially enlarged view showing a turbine runner in which the brazing material of FIG. 6 is arranged. In these drawings, the same components as those shown in FIGS. 1 to 5 are denoted by the same reference numerals.

  As shown in FIG. 7, the brazing material 200 includes an inner portion 200 a extending along the inner peripheral surface side portion of the slit 72 bs formed in the outer peripheral edge portion 72 b of the shell 72, and the shell 72 of the protrusion 76 a of the blade 76. It is formed of an outer portion 200b that extends along a portion that is exposed and bent on the outer peripheral surface 72e, and a connection portion 200c that connects the inner portion 200a and the outer portion 200b. The inner portion 200a is longer than the slits 72bs, and the outer portion 200b is slightly longer than one side of the projection 76a that is bent into a triangular shape. The outer portion 200b is in contact with one side of the projection 76a that is bent and has a triangular shape.

  The brazing material 200 is a rod-shaped material manufactured from copper (or copper alloy), and the rear end portion (the portion close to the connection portion 100c) of the inner portion 200a is bent by about 180 ° by a wire rod processing machine. A part slightly ahead of the part is further bent by about 90 °. Thus, the connection part 200c is formed by bending twice.

  A brazing method for brazing the shell 72, the inner core 74, and the blade 76 will be described.

  In brazing, first, as shown in FIG. 7, the connecting portion 200 c of the brazing material 200 is hooked on the outer peripheral edge 72 b of the shell 72. In this case, the inner portion 200a of the brazing material 200 is placed on the blade 76, and the outer portion 200b is placed on one side of the projection 76a that is bent and formed into a triangular shape. As a result, the brazing material 200 is stably hooked on the outer peripheral edge 72 b of the shell 72. For this reason, even if the turbine runner 70 sways (vibrates) due to conveyance during brazing, the brazing material 200 hardly moves. Therefore, a phenomenon (wax cutting) in which the brazing material 200 is not present in the portion to be joined by the brazing material 200 is prevented.

It is a perspective view which shows the position of the brazing material at the time of brazing a turbine runner. It is XX sectional drawing of FIG. It is a side view which shows a braid | blade. (A) is a perspective view which shows the conventional brazing material, (b) is a perspective view which shows an example of the brazing material of this invention. It is the elements on larger scale which show the turbine runner by which the brazing material of FIG.4 (b) was arrange | positioned. It is a perspective view which shows the other example of the brazing material of this invention. It is the elements on larger scale which show the turbine runner by which the brazing material of FIG. 6 is arrange | positioned.

Explanation of symbols

70 turbine runner 72 shell 72a shell opening 72b shell outer peripheral edge 72bs shell slit 72c shell inner peripheral edge 72cs shell slit 74 inner core 74b inner core outer peripheral edge 74c inner core inner peripheral edge 76 blade 100, 200 Brazing material 100a, 200a Brazing material inner part 100b, 200b Brazing material outer part

Claims (3)

A shell having an opening formed in the center and a plurality of slits formed in the outer peripheral edge and the inner peripheral edge at predetermined intervals, and disposed between the outer peripheral edge and the inner peripheral edge of the shell. A slit is formed on the outer peripheral edge of the ring that faces the outer peripheral edge of the shell, and a slit that faces the inner peripheral slit of the shell is formed on the inner peripheral edge. The inner core and the space between the outer peripheral edge of both the shell and the inner core and the space between the inner peripheral edge of both the shell and the inner core. A brazing material for brazing the blade of the turbine runner to the shell and the inner core.
An inner part extending along the inner peripheral surface side part of the slit formed in the outer peripheral edge of the shell;
A brazing material comprising: an outer portion extending along a portion of the protrusion of the blade exposed on the outer peripheral surface of the shell. The inner portion is disposed along the inner peripheral surface side portion of the slit formed in the outer peripheral edge portion of the shell, and the outer portion is a portion of the protrusion of the blade exposed on the outer peripheral surface of the shell. The brazing material according to claim 1, wherein the brazing material is hooked on an outer peripheral edge portion of the shell so as to be disposed along the outer periphery of the shell. A shell having an opening formed in the center and a plurality of slits formed in the outer peripheral edge and the inner peripheral edge at predetermined intervals, and disposed between the outer peripheral edge and the inner peripheral edge of the shell. A slit is formed on the outer peripheral edge of the ring that faces the outer peripheral edge of the shell, and a slit that faces the inner peripheral slit of the shell is formed on the inner peripheral edge. The inner core and the space between the outer peripheral edge of both the shell and the inner core and the space between the inner peripheral edge of both the shell and the inner core. A brazing method for brazing the blade of a turbine runner with a projection formed thereon to the shell and the inner core;
An inner portion extending along the inner peripheral surface side portion of the slit formed in the outer peripheral edge portion of the shell, and an outer portion extending along a portion of the projection of the blade exposed on the outer peripheral surface of the shell. A brazing method characterized by using a brazing material and brazing the brazing material in a state of being hooked on the outer peripheral edge of the shell.

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