JPH0276648A - Parts fixing method and device with band - Google Patents

Abstract

PURPOSE:To allow a common laser oscillator for two working lines to perform parts fixing operation altenately with good efficiency by arranging the two working lines parallelly, and carrying out the band welding process on one of the lines while preparatory process is made on the other line. CONSTITUTION:While the preparatory process is made on one of the working lines 1, i.e., transporting objects to be installed between working stations 51-54 and subsequent winding-fast of a band at each working station, the other working line 1 is fed with laser beam from a laser oscillator 25, and band welding is carried out one after another at a plurality of working stations belonging to this line 1 using laser irradiating heads 231, 232 of this line. The other line 1 is under preparatory process when this welding process is finished on the first named line, and laser beam is supplied from the laser oscillator 25 to this line 1 with the preparatory process completed, and band on one line performs welding.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a boot or the like that is inserted into an object to be assembled, mainly consisting of a drive shaft for a vehicle, so as to cover the open ends of constant velocity joints at both ends of the object. The present invention relates to a method and device for fixing parts using a band.

(Prior art) Conventionally, Japanese Patent Publication No. 58-34710 and J.S. 58
- According to Publication No. 146630, after a band is wrapped around the end of the boot using a band wrapping device, the overlapping portions at both ends of the band are welded using a laser beam irradiated from a laser irradiation head to fix the boot. Things are known.

By the way, the boot that is inserted into the drive shaft needs to be fixed at the large diameter end to a constant velocity joint and at the small diameter end to the shaft body. The large-diameter end and the small-diameter end of each boot inserted into both ends of the shaft are fixed in sequence in a staggered manner.

(Problem to be Solved by the Invention) It is inefficient to fix the boots while shifting the position of the drive shaft as described above.In order to improve productivity, a work line with multiple work stations has been developed. A band wrapping device for wrapping a band around the end of each predetermined boot is arranged at each work station, and the drive shaft is sequentially conveyed to these work stations to perform the work of fixing the boots in an assembly line. It is considered.

In this case, in order to increase efficiency, it is desirable to install multiple laser oscillators at each work station so that the bands can be welded simultaneously at multiple work stations after the band wrapping process is completed, but laser oscillators are quite expensive. Therefore, in order to reduce equipment costs, it is recommended to use a single laser oscillator, sequentially supply the laser beam to multiple work stations, and perform the welding processes at these stations in sequence according to a predetermined welding order. I have no choice but to do it.

Therefore, the welding process takes time, which is an obstacle to further improving productivity.

In view of the above points, it is an object of the present invention to provide a method and apparatus that can perform a component fixing operation with the highest possible efficiency using a single laser oscillator.

(Means for Solving the Problems) In order to achieve the above object, in the present invention, the objects to be assembled are transported to a work line having a plurality of work stations, and the objects to be assembled are transported by a band winding device at each work station. Wrap the band around each predetermined tightening point of the part inserted into the object,
In a method of fixing parts in which the band is welded by irradiating a laser beam from a laser irradiation head to the overlapping parts at both ends of the band, two work lines are installed in parallel, and a common one
The laser beam from the laser oscillator on the table can be selectively supplied line by line to the laser irradiation head provided in each work line, and the workpieces to be assembled are carried alternately into both work lines, and the band is wound. The present invention is characterized in that while the setup process including the attaching process is carried out on one work line, the band welding process is carried out on the other work line.

(Function) While one work line is carrying out the setup process, that is, transporting the workpiece between each work station and then winding the band at each work station, a laser oscillator is placed on the other work line. The bands are sequentially welded at a plurality of work stations on the line using a laser irradiation head attached to the line.

Then, during the setup process on the other line after the welding process is completed, a laser beam from a laser oscillator is supplied to the one work line that has completed the setup process, and the band welding process on the one line is started. By repeating the above operations, parts are fixed alternately and continuously using two work lines.

(Example) As shown in FIG. 14, the illustrated embodiment includes a boot C4 inserted into a first joint B consisting of a tripod type constant velocity joint at one end of a drive shaft A, and a bell type constant velocity joint at the other end. A boot C2 inserted into a second joint B2 consisting of
4.82, and a damper weight D assembled to the shaft body A is similarly secured with a band E.

Referring to FIGS. 1 and 2, (1) shows a work line in which the drive shaft A is held and transported by a transport jig (2), two work lines (1) are provided in parallel, First to fourth work stations (51), (52), (53), and (54) are provided between the input station (3) at the starting end of each work line (1) and the unloading station (4) at the end. The drive shaft A that has been transported by the conveyor (6) from the external assembly equipment is transferred to the transport jig (2) located at the input station (3) of each work line (1) by the transport device (7). , the transport jig (2) is transferred from the loading station (3) to each work station (5+) (
52) (53) Transfer device (8) to (54)
At the first work station (51), the large diameter end of the boot c2 for the second joint B2 is fixed, and at the second work station (52) the boot C2 for the second joint 82 and the first joint B are , fixing the small diameter end of the boot C1 for the 3rd work station (
At step 53), the large diameter end of the boot C7 for the first joint B is fixed, and at the fourth work station (54), the damper weight D is fixed, and then at the dispensing station (4), the dispensing device (9) is fixed. The drive shaft A was removed from the transport jig (2) and delivered to the delivery conveyor (IO), and the empty transport jig (2) was returned to the input station (3) via the return conveyor (It).

The conveyance jig (2) has guide rails (la) (la) on both sides of the work line (1), as shown in FIGS. 3 to 5.
A jig main body that can be slid along
3a), and a first clamper (13) that grips the shaft portion of the first joint B1 is attached to the jig frame (13).
14+), a second clamper (142) that grips the shaft body A1, and a third clamper (143) that grips the shaft portion of the second joint 82. ) (14a), as shown in FIG.
A pair of left and right clamp pieces (14c) (14c') are supported slidably in the lateral direction via a pair of upper and lower guide bars (14b) (14b), and both clamp pieces (14c) (
14c'), a pinion (14c') is pivotally supported on the holder (14a)
A pair of upper and lower racks (14e) interlocking with (14d) (1
4ci are connected to each other, and both clamp pieces (14c) (1
4c') are configured so that they can be opened and closed in the lateral direction in synchronization with each other, and one clamp piece (14c) is held by a spring (
141') to the closing side, and normally each clamper (141') is biased toward the closing side.
41) (142) (143) are held in a clamped state, and the other clamp piece (14c') is attached to the holder (14a).
) is inserted into the loading station (3) and the dispensing station (4), facing the suppressing members (14g) of the clampers (141, 142, and 143). An operating device ('
1Sl is arranged, each pressing member (14g) is pushed by the suppression plate (15a), and each clamper (14d (1
42) The unclamp operation of (143) was performed.

The carrying-in device (7), as shown in FIGS. 1 and 7,
The tenth device (1 (9)) receives the drive shaft A from the work receiver (6a) provided at the end of the conveyor (6)
(between the IG, a pair of positioning devices ■0 placed on both sides of the end of the conveyor (6), and the input station (3) of each work line (1) and each positioning device (+7) It consists of a pair of 20-day devices (1g), which are movable back and forth.

The drive shafts A are alternately received and transferred to each positioning device (ID), and then transferred to each positioning device (17
1, connect drive shaft A to each joint BI, B2
and boots CI and C2 are aligned in their respective positions, and then the loading station (3) of one work line (1) and the loading station (3) of the other work line (1) are connected by the cue aa of both boxes 20-da device. The drive shafts A were carried in alternately to station (3) and station (3).

Each of the TS10-da devices ao has a slide table (IGa) that can be slid laterally mounted on a machine frame aS installed horizontally so as to straddle the terminal end of the conveyor (6), and
A movable frame (1Gb) that can freely move forward and backward in the front and back direction is mounted on the movable frame (16b), and three clampers are mounted on the movable frame (16b) to grip the drive shaft A between the shaft portion of each joint B2 and the shaft body A1. (16c) and a horizontally elongated gripping head (IGd) is suspended by a cylinder (IGe) so as to be able to rise and fall freely, and a drawing brush 10-da device (
A shift cylinder (16g) connected to one slide table (16a) by connecting the slide tables (16a) (16a) of IO (IO) via a connecting rod (16f')
so that the brush 10-da device aO can be moved alternately between a central receiving position facing the conveyor (6) and a lateral delivery position facing each positioning device 0, and each of the 10th -Gripping head of da device 00 (1G d )
is lowered, and the workpiece receiver (
6a) receiving the upper drive shaft A, lowering the gripping head (IGd) with the movable frame (IGb) of each tenth device CIO advanced at the delivery position;
The drive shaft A was placed on each positioning device (Iη).

Each of the 20th-day devices ('Ie represents each positioning device (+)
7) Loading station (3) in front of the upper position
Slide frame (18a) that can freely move back and forth on the machine frame that extends to the side.
A cylinder (18b) is attached to the slide frame (18a).
) is attached to the elevating frame (18c), and the elevating frame (18c) is equipped with a
A gripping head (18c) equipped with several clampers (18d)
) is rotatably suspended via a rotary actuator (18f'), and the 20th-day device ('l
ε by the movement of the slide frame (18a).
7) Rear receiving position and loading station facing upward (3)
At the receiving position, the gripping head (18e) is lowered with its elongate direction facing the lateral direction, and the drive shaft A on the positioning device cD is moved to the front delivery position facing above. After receiving it at (18e),
While moving to the delivery position, the gripping head (18e) is rotated 90'' so that the drive shaft A is in a vertical position with the first joint BI facing forward, and after moving to the delivery position, the reading gripping head (18e) is 18e) was lowered to deliver the drive shaft A to the transport jig (2) which was returned to the loading station (3).In addition, each loader device ae CI
The clampers (16c) (18d) of e are attached to the gripping heads (16d) (18e) so that their positions can be adjusted to accommodate changes in model.

Each of the work stations (51) to (54) is provided with a band winding device, that is, the first work station (51) has a first band winding device that matches the large diameter end of the boot C2 for the second joint B2. Band winding device (21t) and second
At the work station (52), there are two band winding devices (second and third) that match the small diameter ends of the boot C2 for the second joint 82 and the boot C for the first joint B, respectively.
12) (213) and the third work station (53)
A fourth band winding device (21a) that matches the large diameter end of the boot C2 for the first joint 81, and a fifth band winding device (21s) that matches the damper weight D at the fourth work station (54). Further, each work station (51) to (54) is provided with a positioning unit that positions the transport jig (2) and lifts up the drive shaft A to a fixed position, and lifts up the drive shaft A. In this state, the band E is wound by each band winding device.

Each band winding machine device 0 is equipped with a winding head (21b) that supplies the band E fed out from a band coil (21a) as shown in FIG. 2, and after lifting up the drive shaft A, the winding head (21b) The arm (
21c) upward from the lower relief position, and move the pair of left and right guide pieces (21d) ( 2
1d) and the attached guide piece (21e) leaving a gap between the arm (21c) and the attached guide piece (21e), feed the band E into this gap and wrap the band E around the outer periphery of the wrapping point a little more than one time. Then, as shown in FIG. 8(b), these guide pieces (2
1d) (21c) while tightening the pan lower E.
The upper guide sleeve (21f) of the winding head (21b)
') with a cutting blade (21g) inserted into the suppression member (21
After cutting, the laser beam irradiated from the laser irradiation head (described later) is passed through the irradiation hole formed in the suppression member (21h) to overlap both ends of the band E. The band E was welded. In the figure, (2N) indicates a back bar provided on the winding head (21b) so as to be movable in the shaft axial direction so as to be attached to the inner surface of the overlapping portion of the band E.

The configuration of the band winding device described above is
It is not particularly different from that known in No. 630, and further detailed explanation will be omitted.

In this embodiment, the second to fifth band winding devices (21
2) to (2ts) can be moved in the front-rear direction by each motor (21j) via a screw rod (21k), as shown in FIG. 1, so that their positions can be changed depending on the model.

The positioning unit is a machine stand c! placed on the outside of the guide rail (la) on the minus side of the work line (1) as shown in FIGS. 9 to 11. 2a) on top of the cylinder (22b
), a pair of positioning bins 122c) C22c) are provided that can move forward and backward in the lateral direction, and a support column C! 2d) Fixed guide rail G! 2e) along cylinder c! 2r) and a stopper cl attached to the upper end of the support column 22d). 2h) and each positioning bin (!2h).
c) is moved inward in the lateral direction to engage each positioning block (12a) fixed to the jig main body aδ of the transport jig (2) to position the transport jig (2), and then the lifter (
22g) to the position where the jig frame of the transport jig (2) (the arm (13b) contacts the stopper 22h via the operating arm (13b)), and lift the jig frame. (
The drive shaft A, which is held via the clamper (14d (142) (14a)) on the drive shaft A, is lifted into position by a lift door knob.

In addition, the shaft diameter and join can be changed by changing the model! - When the diameter changes, it is necessary to change the lift-up position of the drive shaft A accordingly, so in this embodiment, two sliders of different heights are attached to the slider 1221) attached to the upper end of the support column (22d). Install the stopper (22h) C22h) stingily, IJ 7/'C22g)1. 17 so that both the stoppers 122h) (22h) can be selectively moved and set to the opposing through operation position.

In addition, on each work line (1), there are two laser irradiation heads (23t) (232), the first and second laser irradiation heads that can move back and forth.
is provided for each work line (
1) Above the machine frame C, which is longitudinally extending from the first work station (51) to the fourth work station (54)! 12 and 13 to the machine frame I2Φ.
As shown in the figure, for each laser irradiation Rad (23t)
2) of each support plate attached to a) is supported slidably in the front and back direction along a pair of upper and lower guide rails (24a) (24a), and the machine frame (
Binion (2
A motor (23C) that rotates the base plate 3b) is mounted so that the table support plate (23a), that is, each laser irradiation head (Z3 +) (232) can be moved back and forth independently of each other by the motor (23c). I made it.

Then, the first loser irradiation head (Z3+) is connected to the first and second
The second laser irradiation head 2) is attached to the third to fifth band winding devices (213) (21A) (216) at positions corresponding to the band winding devices (21+) (212).
), and five band winding devices (
21+) to (2b) were divided into welding bands.

At the front end of the machine frame Q/D, there is a mirror box ■ that introduces the laser beam from the laser oscillator ■ (see Figure 1), and each laser irradiation head (Z3 +
) (Z32) also has a mirror box (27t) at the top end.
(272) and these boxes ■ (27d (
272) are connected in series via a bellows-shaped light guide tube (2), and the laser beam is further connected to the mirror box (272) at the upper end of the second laser irradiation head (232).
A movable mirror (27a) is housed in a reflecting position where the laser beam is reflected downward toward the laser beam, and an open position where the laser beam is directed straight toward the second loser irradiation head (2h). Laser irradiation head (23d (
232) so that a laser beam can be selectively introduced.

And both laser irradiation heads (23+) (232)
the first to fifth band winding devices (21+) to (215)
The band E that was wrapped in the above steps was welded in order.

Referring to Figures 1 and 2, ■ indicates a light guide path connected to the laser oscillator ■, and the tip of the light guide path ■ is connected to the mirror box ■ at the above-mentioned introduction end of one work line (1). At the same time, a branch part (29a) is provided in the middle of the light guide path (2), and the mirror box Qe- at the introduction end of the other work line (1) is connected to the branch part (29a).
A reversing mirror (29b) was housed in 9a) so that a laser beam could be selectively supplied to both work lines (1) (1).

Next, the operation of this embodiment will be explained.

First, one work station (1) is moved by the loading device (7).
) After loading and setting the drive shaft A in the transfer jig (2) located at the input station (3), the transfer operation is performed at the one work station (1), and each work station (51) to (54) is loaded and set. ), each transport jig (2) is positioned by each positioning device to lift up the drive shaft A, and then each band winding device (21+) to (21s) Accordingly, the first band wrapping device (2h) is used to tighten the large diameter end of the boot C2 of the drive shaft A in the first work station (51), and the second and third band wrapping devices ( 212) and the small diameter end of the boot CI of the drive shaft A in the second work station (52) by (212) (213), and the drive shaft A in the third work station (53) by the fourth band winding device (214). The large diameter end of the boot C1, the fifth band winding device (2
16), the bands E are wrapped around the damper weights D of the drive shaft A present at the fourth work station (54) and cut.

While the above setup process is being carried out, a laser beam from the laser oscillator ■ is supplied to the mirror box ■ at the introduction end of the other work line (1),
) equipped with a first and second laser irradiation head (Z3t)
(Z32) is moved alternately to sequentially weld each band E that has already been wound.

Then, during this welding process, the other work line (1)
The drive shaft A is carried in and set by the carrying device (7) to the carrying jig (2) located in the loading station (3) of , and each carrying jig (2) of l is set on the reading work line (1) after the welding process is completed. Each is transported to the next station and the same setup process as above is performed, and during this setup process, a laser beam from the laser oscillator ■ is applied to the mirror box ■ of the one work line <1) where the setup process has already been completed. and band E in the other work line (1).
Perform the welding process.

As described above, the setup process and the welding process are alternately repeated on both work lines (1) and (1), and the work of fixing the boots B7 and 82 and the damper D is continuously performed.

(Effects of the Invention) As is clear from the above description, according to the present invention, two work lines are installed in parallel, and during the setup process on one work line, the band welding process is performed on the other work line. As a result, both work lines can alternately and efficiently fix parts using a common laser oscillator, which has the effect of greatly improving productivity.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an example of the device according to the present invention, Fig. 2 is a front view taken from line ■-■ in Fig. 1, and Fig. 3 is a plan view of a conveying jig used for conveying the drive shaft. , Fig. 4 is a sectional view taken along the line IV-IV in Fig. 3, Fig. 5 is a sectional view taken along the line ■-V in Fig. 4, and Fig. 6 is a sectional view taken along the line Vl-VI in Fig. 4. Figure 7 is an enlarged side view of the transfer device seen from the line ■-■ in Figure 1, Figures 8 (a) and (b) are explanatory diagrams showing the operation of the band winding device, and Figure 9 is an illustration of the operation. FIG. 10 is a right side view of FIG. 9, FIG. 11 is a plan view taken along line XI-XII of FIG. 9, and FIG. 12 is a front view of the positioning device provided in the station. FIG. 13 is a left side view of FIG. 12, and FIG. 14 is a longitudinal sectional view of a drive shaft as an assembly object. A...Drive shaft (assembled item) Self・02゛°°
Boo'') (Parts) D... Damper weight E... Band (1)... Work line (51) to (54)... Work station (7)...
・Carry-in device (2h) ~ (21s)...Band wrapping device (231)
(Z32)...To laser irradiation...Laser oscillator (29a)...Moving mirror (switching means) Fig. 8 (a) (b) Fig. 6

Claims (1)

[Claims] 1. The object to be assembled is transported to a work line having a plurality of work stations, and at each work station, each predetermined tightening of the parts inserted into the object to be assembled is performed by a band winding device. In this method of fixing parts, a band is wrapped around a location and the overlapping parts at both ends of the band are irradiated with a laser beam from a laser irradiation head to weld the band. Two work lines are installed in parallel, and one common unit is used. A laser beam from a laser oscillator is selectively supplied line by line to a laser irradiation head provided in each work line, and objects to be assembled are alternately delivered to both work lines and the band is wound. A method for fixing parts using a band, characterized in that while a setup process including a process is being performed on one work line, a band welding process is performed on the other work line. 2. A work line for transporting objects to be assembled is provided with a plurality of work stations, and each work station is equipped with a band wrapping device that wraps a band around each predetermined tightening location of the parts inserted into the objects to be assembled. In a device for fixing parts using a band, in which the band is welded by irradiating a laser beam from a laser irradiation head to the overlapping portions at both ends of the band that has been placed and wound by the band winding device, two work lines are provided. In addition to providing a loading device that is installed in parallel and alternately loading objects to be assembled into both work lines, a common laser oscillator and a laser irradiation head equipped with a laser beam from the laser oscillator are installed in each work line. A component fixing device using a band, characterized in that it is provided with a switching means for selectively supplying it on a line-by-line basis.