JPH048953A - Balance weight joining method for torque converter and its device - Google Patents

Abstract

PURPOSE:To accurately correct unbalance by cutting the balance weight out of a band shaped metallic plate, joining the balance weight onto the outer circumference of a torque converter at a specified position by means of spot welding or bonding, and thereby preventing the occurrence of strain due to heating. CONSTITUTION:When a feeding servo motor 35 is driven as required in response to the magnitude of the unbalance of a torque converter T, a drive plate 38 is advanced, and the tip end of a metallic plate 33 is held by chuck pawls 68, so that the metallic plate 33 is thereby fixed on a cutting table 44 by a clamp member 45. The balance weight 34 of a specified length is cut off by a cutter 47 from the metallic plate 33, the balance weight 34 is abutted against the side surface of the torque converter T on a turn table 76 by means of a rocking arm 57, the turn table 76 is rotated to a specified position by a detecting device, and a welding chip 74 is inserted, so that the balance weight 34 is thereby spot welded to the torque converter T. By this constitution, the balance weight can be accurately adjusted in weight, the deformation of a torque converter casing due to welding heat can thereby be avoided.

Description

Detailed Description of the Invention A1 Objective of the Invention (1) Industrial Application Field The present invention provides a balance weight for a torque converter that transmits torque from an internal combustion engine to a driven side in order to correct the unbalance of the torque converter. and a device for direct use in carrying out the method.

(2) Conventional technology Conventionally, it has been known to measure the unbalance of a rotating body such as a torque converter or propeller shaft, and to apply a build-up to the outer circumference of the rotating body by seam welding in order to correct the detected unbalance. (See Japanese Unexamined Patent Publication No. 63-40829).

(3) Problems to be Solved by the Invention However, when the conventional unbalance correction method described above is applied to correct the unbalance of a torque converter, the casing of the torque converter is locally heated by the seal welding torch, causing distortion in the casing. In addition, there is a problem that it is difficult to apply an accurate amount of overlay due to instability of welding conditions, and the working environment is worsened by torch sparks.

In order to avoid such inconvenience, various preparations are made in advance.
It is conceivable to select an appropriate balance weight from among the weights of the torque converter and weld it to the torque converter casing, but with this method, the types of balance weights are limited, so it is difficult to completely correct the unbalance. It is.

The present invention has been made in view of the above-mentioned circumstances, and provides a torque converter unbalance correction method and device that can accurately correct the unbalance without causing distortion in the torque converter casing due to heating. The purpose is to provide.

B1 Structure of the Invention (1) Means for Solving the Problems In order to achieve the above object, the present invention measures the unbalance of a torque converter, and in order to correct the unbalance, a balance weight is attached to the outer periphery of the torque converter. A torque converter balance weight joining method includes the steps of cutting a balance weight of a weight capable of correcting the amount of unbalance of the torque converter from a band-shaped metal plate, and transporting the cut balance weight to the outer periphery of the torque converter. and a step of joining the balance weight to the torque converter by spot welding or adhesion.

The present invention also provides a torque converter balance weight joining device for measuring an unbalance of a torque converter and joining a balance weight to the outer periphery of the torque converter in order to correct the unbalance, the device rotatably supporting the torque converter. a feeding mechanism that feeds out a strip-shaped metal plate in predetermined lengths, a cutting mechanism that cuts the fed-out strip-shaped metal plate to form a balance weight, and a rotation drive mechanism that transports the formed balance weight to rotate the The present invention is characterized by comprising a conveying mechanism that contacts the outer periphery of the torque converter supported by a drive mechanism, and a welding mechanism that spot-welds the balance weight to the torque converter. At this time, it is desirable to employ laser welding or beam welding as the welding mechanism.

(2) Function According to the torque converter balance weight joining method described above, the balance weight is obtained by cutting a band-shaped metal plate into a predetermined length, and this balance weight is transported to a position where it abuts the side surface of the torque converter. and is joined to the torque converter by spot welding or gluing.

Further, according to the torque converter balance weight joining device described above, the band-shaped metal plate sent out by the feeding mechanism is cut into a predetermined length by the cutting mechanism to form the balance weight. This balance weight is brought into contact with the outer periphery of the torque converter rotatably supported by the rotary drive mechanism by the transport mechanism, and spot welded by the welding mechanism.

(3) Examples Hereinafter, the present invention will be described in detail based on the drawings.

Figures 1 to 4 show one embodiment of the present invention.
The figure is a perspective view of the balance weight supply mechanism, Figure 2 is an overall plan view of the balance weight welding mechanism, Figure 3 is a sectional view taken along the line ■-■ in Figure 2, and Figure 4 is the rV-- line in Figure 2. rV
FIG.

As shown in FIG. 1, the balance weight supply mechanism 31 cuts a band-shaped metal plate 33 wound on a reel 32 into a predetermined length to form a balance weight 34 to be welded to the outer periphery of the torque converter T. It is composed of a feeding mechanism for the band-shaped metal plate 33 and a cutting mechanism for the band-shaped metal plate 33.

The feeding mechanism for the strip metal plate 33 is a feeding servo motor 35.
It is equipped with an L-shaped drive plate 38 supported by a rack 37 that reciprocates in mesh with a pinion 36 that is rotationally driven by a pinion 36, and a pressing cylinder 40 supported on the upper part of this drive plate 38 via a bracket 39. A pressing plate 41 is provided vertically movably to sandwich the band-shaped metal plate 33 between the driving plate 38 and the pressing plate 41 . The reel 32 is attached to the output shaft of a tension loosening motor 42 in order to sequentially feed out the strip metal plates 33, and the strip metal plates 3 fed out from the reel 32 are
3 is provided with a limit switch 43 that detects the tension of the belt-shaped metal plate 33 and controls the drive of the tension loosening motor 42.

The cutting mechanism for the band-shaped metal plate 33 includes a cutting table 44 provided adjacent to the moving end of the drive plate 38, and a cutting table 44 provided adjacent to the moving end of the drive plate 38.
A clamp member 45 that fixes the tip of the band-shaped metal plate 33 to
and a cutting cylinder 48 for driving a cutter 47 that cuts the fixed band-shaped metal plate 33 in cooperation with the cutting table 44. The distal end of the fed-out band-shaped metal plate 33 is cut by the cutter 47 while being held by a pair of chuck claws 68, which will be described later, to form a balance weight 34 of a predetermined length.

As shown in FIGS. 2 to 4, the balance weight joining mechanism 49 includes a transport mechanism for the balance weight 34, a welding mechanism for spot welding the transported balance weight 34 to the outer periphery of the torque converter T, and a welding mechanism for spot welding the transported balance weight 34 to the outer periphery of the torque converter T.
It consists of a rotation drive mechanism that supports and rotates the

The conveyance mechanism for the balance weight 34 is slidably supported by two guide rods 50, connected to a piston rod 52 of a moving cylinder 51, and reciprocated in a direction parallel to the feeding direction of the band-shaped metal plate 33. A base 53 is provided. Two guide rods 54 arranged perpendicular to the guide rods 50 are supported on the upper surface of the base 53, and a slider 55, which is slidably supported by both guide rods 54, is supported by a connecting rod 56. interconnected. A swing arm 570 base block 57a is rotatably supported in the middle of the connecting rod 56, and a U-shaped U-shaped shaft is provided at the tip of a piston rod 60 of a swing cylinder 59 supported on the base 53 via a bracket 58. Knuckles 61 are connected. A cam plate 62 is fixed to the upper surface of the base 53 in parallel with the guide rod 54, and a roller 63 provided on the lower side surface of the base block 57a is engaged with a cam groove 62a formed in the cam plate 62. It matches. Therefore, by contracting the swing cylinder 59, the base block 5 is moved along the guide rod 54.
When 7a is moved backward, the roller 63 is guided by the cam groove 62a of the cam plate 62, and the swing arm 57 is tilted together with the base block 57a to the horizontal position shown by the chain line. Furthermore, when the swinging cylinder 59 is extended, the swinging arm 57 moves forward and rises to the vertical position shown by the solid line.

A fixed plate 64 is fixed to the tip of the swinging arm 57, and a movable plate 67, which is biased by a spring 66, is slidably supported by two guide bins 65 planted in front of the fixed plate 64. . A balance weight 34 cut from the band-shaped metal plate 33 is mounted on the front surface of the movable plate 67.
A chuck cylinder 69 is provided with a pair of chuck claws 68 that can be closed and closed in order to grip the chuck. That is, when the swing arm 57 is in the tilted position shown by the chain line, the tip of the band-shaped metal plate 33 is fed between the pair of chuck claws 680 and gripped, and cut by the cutter 47 (see FIG. 1). The chuck claw 68 that grips the balance weight 43 cut from the band-shaped metal plate 33 is attached to the base 5.
3 and at the same time, the swinging arm 57 stands up on the base 53 at the position indicated by the solid line, so that the balance weight 34 held by the chuck claw 68 is moved horizontally by the torque converter supported by the rotational drive mechanism described below. It touches the side of T. At this time, as the spring 66 is compressed, the chuck claw 68 is slightly retracted, and the balance weight 34 is pressed against the side surface of the torque converter T with a predetermined pressure.

The welding mechanism includes a welding cylinder 72 supported at the upper end of a column 70 via a bracket 71, and a welding tip 74 for laser welding or beam welding is attached to the tip of a piston rod 73. Then, when the swing arm 57 stands up to the position indicated by the solid line, the welding tip 74 moves into the chuck claw 68 due to the extension of the welding cylinder 72.
It comes into contact with the side surface of the balance weight 34 which is held by the user.

The rotational drive mechanism includes a turntable 76 that rotatably supports the torque converter T on a base 75. A rotary servo motor 77 is provided on the upper part of the turntable 76 so as to be movable up and down, and a drive member 78 that can be engaged with the center of the torque converter T is attached to the lower end of its output shaft. Further, a detection device 7 for detecting the rotational position of the torque converter T is provided near the turntable 76.
9 is provided.

Next, the operation of the embodiment of the present invention having the above-described configuration will be explained.

With the suppression cylinder 40 of the balance weight supply mechanism 31 extended and the belt-shaped metal plate 33 sandwiched between the suppression plate 41 and the drive plate 38, supply is performed according to the amount of unbalance of the torque converter T detected in the previous process. When the servo motor 35 is driven by a predetermined amount, the pinion 36 and the rack 37
The drive plate 38 moves forward through the movement, and the tip of the band-shaped metal plate 33 is inserted between the chuck claws 680 provided at the tip of the swinging arm 57 in a horizontal position. Next, the chuck cylinder 69 is driven and the tip of the band-shaped metal plate 33 is gripped by the chuck claw 68.
At the same time, the clamp cylinder 46 is extended to fix the band-shaped metal plate 33 on the cutting table 44 with the clamp member 45. Next, when the cutting cylinder 48 is driven and the cutter 47 cuts the band-shaped metal plate 33, the balance weight 34 of a predetermined length held by the chuck claws 68 is separated from the band-shaped metal plate 33. At this time, when the belt-shaped metal plate 33 is fed out by the supply servo motor 35 and tension is applied to the belt-shaped metal plate 33, the limit switch 43 is activated and the tension loosening motor 42 is rotated. The reel 32 is driven to supplement the belt-shaped metal plate 33.

Now, when the balance weight 34 is gripped by the chuck claw 68 as described above, the balance weight joining mechanism 4
The moving cylinder 51 of No. 9 contracts and moves the base 53 along the guide rod 54, and at the same time the swinging cylinder 59
extends to swing the swinging arm 57 from the tilted position to the upright position. As a result, the balance weight 34 held by the chuck claws 68 comes into contact with the side surface of the torque converter T supported by the turntable 76.

Subsequently, the rotation servo motor 77 is activated, and the turntable 76 is rotated to a predetermined position while the rotation angle is detected by the detection device 79 in order to position the balance weight 34 at a predetermined position on the outer periphery of the torque converter T. next,
The welding cylinder 72 extends and the welding tip 74 provided at the tip of the piston rod 73 connects to the pair of chuck claws 680.
The balance weight 34 inserted between the two and held by the chuck claws 68 is spot welded to the outer periphery of the torque converter T. At this time, when the length of the balance weight 34 is short, only one spot is spot welded, but when the length of the balance weight 34 is long, the rotation servo motor 77 is driven and the torque converter T Spot welding is performed at multiple locations in the longitudinal direction of the balance weight 34 while rotating the balance weight 34.

When the balance weight 34 is welded to the torque converter T as described above, the welding tip 7 is first moved to receive the balance weight 34 to be welded to the torque converter T, which is then carried onto the turntable 76. Then, the base 53 returns to the original position and the swing arm 57 swings to the tilted position, completing one cycle.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the embodiments described above, and various small design changes may be made without departing from the scope of the present invention as set forth in the claims. It is possible to do so.

For example, instead of joining the balance weight 34 to the side surface of the torque converter T by spot welding, the balance weight 34 can be joined by adhesive.

C0 Effects of the Invention As described above, according to the torque converter balance weight joining method of the present invention, the balance weight is formed by cutting a band-shaped metal plate into a predetermined length. Not only is there no need to prepare a large number of balance weights, but the weight of the balance weight can be precisely adjusted. Furthermore, since the balance weight is joined to the torque converter by spot welding or adhesive, deformation of the casing of the torque converter due to the heat of conventional seam welding can be avoided.

Further, according to the torque converter balance weight joining device of the present invention, the balance weight is formed by cutting the belt-shaped metal plate sent out by the feeding mechanism into a predetermined length with the cutting mechanism. Balance weights with precise weights can be obtained without having to prepare a large number of balance weights. Furthermore, since the balance weight is spot welded by the welding mechanism, it is possible to avoid deformation of the torque converter casing due to the heat of conventional seam welding. Further, since the balance weight is welded while the torque converter is supported by the rotational drive mechanism, the balance weight can be easily welded along the outer periphery of the torque converter.

[Brief explanation of drawings]

Figures 1 to 4 show one embodiment of the present invention.
The figure is a perspective view of the balance weight supply mechanism, FIG. 2 is an overall plan view of the balance weight joining mechanism, FIG. 3 is a sectional view taken along line I-III in FIG. 2, and FIG. 4 is IV-IV in FIG.
It is a sectional view taken along the line IV. 33... Band-shaped metal plate, 34... Balance weight,
T...Torque converter

Claims (1)

[Claims] [1] The unbalance of the torque converter (T) is measured, and the balance weight (3
4) to the outer periphery of the torque converter (T), the balance weight (34) having a weight capable of correcting the amount of unbalance of the torque converter (T) is attached to the belt-shaped metal plate ( 33)
The cutting process and the cut balance weight (34
) is brought into contact with a predetermined position on the outer periphery of the torque converter (T), and the balance weight (34) is spot welded or bonded to the torque converter (T).
A torque converter balance weight joining method consisting of a process of joining. [2] Measure the unbalance of the torque converter (T), and add balance weight (3) to correct the unbalance.
4) to the outer periphery of the torque converter (T), the torque converter balance weight joining device comprises: a rotary drive mechanism that rotatably supports the torque converter (T); and a belt-shaped metal plate (33) of a predetermined length. A feeding mechanism that feeds out the metal strip (33) one by one, a cutting mechanism that cuts the fed band-shaped metal plate (33) to form a balance weight (34), and a cutting mechanism that conveys the formed balance weight (34) to the rotational drive mechanism. A balance weight joining device for a torque converter, comprising: a conveying mechanism for bringing the balance weight (34) into contact with the outer periphery of a supported torque converter (T); and a welding mechanism for spot welding the balance weight (34) to the torque converter (T). [3] The balance weight joining device according to claim [1], wherein the welding mechanism is a laser welding device or a beam welding device.