JPH0152146B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a removal device for removing deposits that adhere to a welded part when welding is performed on an opening of a hollow workpiece.

Generally, when a workpiece is welded by projection welding or laser welding, it is inevitable that deposits such as evaporated particles and oxide scale will adhere to the welding location. Unless this is removed, the workpiece cannot be used satisfactorily as a part or the like.

Conventionally, in order to remove deposits from the welding part of a workpiece, methods such as grinding with a grinder or applying a vibrating wire bundle to the welding part and using the impact force of the wire bundle to remove the deposits have been carried out. It was

However, with such means, deposits could only be removed from areas to which a grinder or wire bundle could be applied. For example, as shown in Fig. 1, if workpiece a is a hollow cylinder with an open end, and a cylindrical member b is welded to the open end surface of workpiece a, deposits c will be formed when the two are joined together. It adheres to the inner circumferential surface of the upper end of the workpiece a, but since the grinder or the wire bundle cannot be applied to this adhered area because the member b gets in the way, it is not possible to reliably remove the adhered substance c. Can not. Moreover, since the means using a grinder or a wire bundle is so-called manual work, it results in a decrease in productivity.

This invention has been made based on the above circumstances, and its purpose is to weld a member to the opening of a hollow workpiece, and to remove the adhesive that adheres to the part where a grinder or wire bundle cannot be applied. An object of the present invention is to provide a device for removing deposits in welding processing, which can reliably and automatically remove particles from kimono.

An embodiment of the present invention will be described below with reference to FIGS. 2 to 4. 1 in the figure is a conveyance path. This conveyance path 1 consists of a pair of guides 2, 2 arranged in parallel and spaced apart from each other, and belts 3, 3 that run intermittently in the direction of the arrow along the upper surfaces of these guides 2, 2. A workpiece a as shown in FIG. 1 is conveyed along this conveyance path 1 with both ends of a member b welded thereto in contact with the belts 3, 3.

Further, in the conveyance path 1, a supply mechanism 4, a holding mechanism 6 vibrated by a vibration mechanism 5, and a reversing mechanism 7 are sequentially arranged along the conveyance direction of the workpiece a. The above-mentioned supply mechanism 4 is provided with a hopper 8 whose lower part gradually becomes narrower in diameter above the conveyance path 1, and this hopper 8 has spherical objects, cubes, triangular pyramids, etc. made of glass beads, steel balls, or super steel. Particulate matter 9 is accommodated. A supply pipe 10 is connected to the lower end opening of the hopper 8, and a flexible tube 11 whose lower end is diagonally cut open is connected to the supply pipe 10. Further, a shutter 12 is removably inserted into the lower end of the hopper 8 so as to close the lower end opening of the hopper 8, and this shutter 12 is connected to a rod 14 of a first cylinder 13. When the workpiece a that has been transported along the transport path 1 reaches a position below the supply mechanism 4, that is, a position where the member b welded to the workpiece a comes into contact with the flexible tube 11, a detection (not shown) is performed. This detection signal causes the first cylinder 13 to operate. first cylinder 13
When the shutter 12 operates, the lower end opening of the hopper 8 which has been closed by the shutter 12 is opened, so that the granules 9 contained in the hopper 8 are transported from the open upper surface of the workpiece a through the flexible tube 11. Supplied internally. Note that the first cylinder 13 is operated by a timer for a predetermined period of time, and supplies a predetermined amount of granules 9 into the workpiece a.

The workpiece a, into which the granules 9 have been supplied, is conveyed again through the conveyance path 1 and when it reaches a position facing the holding mechanism 6, it is held between the holding mechanisms 6. That is, the holding mechanism 6 is supported by a substrate 15 having a horizontal portion 15b at the upper end of a vertical portion 15a, with the horizontal portion 15b being connected to the vibrator 17 of the oscillator 16 constituting the vibration mechanism 5. At the lower end of the vertical portion 15a of the substrate 15, one end of a support shaft 18 is rotatably and horizontally supported by a bearing 19 provided on the back surface of the substrate 15. A pinion 20 is fitted onto the other end of the support shaft 18, and a mounting plate 21 is fixed thereto. This mounting plate 21
, the second cylinder 22 and the third cylinder 23
are held by frames 24 and 25. Second
A first clamping body 27 made of an elastic material such as synthetic rubber is connected to the rod 26 of the cylinder 22, and a second clamping body 29 also made of an elastic material is connected to the rod 28 of the third cylinder 23 at one end. Curved surfaces 27a and 29a are formed on opposing surfaces of the other end portions of the clamping bodies 27 and 29 to be joined to the outer peripheral surface of the member b welded to the workpiece a. Therefore, by operating the second and third cylinders 22 and 23, the pair of clamping bodies 27 and 28 are driven in the direction toward and away from each other. Then, in a state where the pair of clamping bodies 27 and 29 are separated, the workpiece a is pushed up by the push-up plate 32 connected to the rod 31 of the lift cylinder 30 arranged below the conveyance path 1, and the workpiece a is pushed up. is held between the curved surfaces 27a and 29a of the pair of holding bodies 27 and 29. At this time, the open upper surface of the workpiece a is closed by the lower end surfaces 27b and 29b of the clamping bodies 27 and 29.

Further, a rack 33 is meshed with the pinion 20. This rack 33 is connected to a rod 35 of a fourth cylinder 34 held on the base plate 15. And, this fourth cylinder 34
is activated after the pair of clamping bodies 27 and 29 clamp the member b welded to the workpiece a. This fourth
When the cylinder 34 is operated and the rack 33 is displaced downward, the pinion 2 meshed with this rack 33
0 is rotationally driven, the mounting plate 21 rotates 180 degrees together with the pinion 20. The mounting plate 21
When the workpiece a is rotated 180 degrees, the vertical direction of the workpiece a is reversed, and the upper end of the workpiece a is connected to the rod 38 of the fifth cylinder 37 attached to the substrate 15 via the pedestal 36. It is held by member 39. That is, the workpiece a is attached to the holding member 3
9 and a pair of clamping bodies 27 and 29, the member b is securely held on the substrate 15 with one welded end face facing downward. At this time, since the opening surface of the workpiece a is closed by the pair of clamping bodies 27 and 29, the particulate matter 9 accommodated in the workpiece a does not flow out.

In this way, when the workpiece a is held on the substrate 15, the oscillator 16 of the vibration mechanism 5 operates for a predetermined time, and the substrate 15 connected and held to the vibrator 17 is activated.
As the workpiece vibrates, the granules 9 in the workpiece a rub against the inner circumferential surface of the workpiece a, peeling off the deposits c attached to the welded part with the member b. Then, when the oscillator 16 stops operating, the fifth cylinder 37, the fourth cylinder 34, and the second and third cylinders
The cylinders 22 and 23 operate sequentially in the opposite direction to the previous direction to return the workpiece a to the conveyance path 1.

The workpiece a returned to the conveyance path 1 is sent to the reversing mechanism 7. The reversing mechanism 7 includes a sixth cylinder 40 disposed above the conveyance path 1, and seventh and eighth cylinders 41 and 42 disposed below. The rod 43 of the sixth cylinder 40 has a stopper 4 that comes into contact with the outer peripheral surface of the member b welded to the workpiece a.
4 is fixed, and the seventh and eighth cylinders 41, 42
The rods 45 and 46 have pressing bodies 47 and 4, respectively.
8 is fixed. When the workpiece a that has been transported along the transport path 1 is transported to a position corresponding to the sixth cylinder 40, the sixth cylinder 40 is activated and the stopper 44 comes into contact with the outer peripheral surface of the member b. come into contact with Next, the seventh cylinder 41 is operated and its pressing body 47 pushes the workpiece a to the stopper 4.
Rotate upward about 45 degrees using the member b in contact with 4 as a fulcrum. Then, the eighth cylinder 42 is operated and its pressing body 48 rotates the upper workpiece a by about 135 degrees from the initial state. Then, since the upper end opening of the workpiece a faces diagonally downward, the particulate matter 9 supplied inside by the supply mechanism 4 is discharged from this opening, and the discharged particulate matter 9 is transferred to a conveyor (not shown). Then, it is returned to the hopper 8 of the supply mechanism 4.

When the particulate matter 9 is discharged from the workpiece a, the sixth, seventh, and eighth cylinders 40, 41, and 42 operate in the opposite direction to the workpiece a from which the deposits c have been removed. is conveyed to the appropriate location by the conveyance path 1.

That is, according to the above configuration, by welding the member b to the upper opening of the workpiece a, the inner circumference of the workpiece a becomes obstructive and cannot be removed with a grinder or wire bundle. The deposits c adhering to the upper end portion of the surface can be reliably and automatically removed by the granules 9.

Note that this invention is not limited to the above embodiment,
For example, if the workpiece a has a cylindrical shape with both upper and lower end surfaces open, and the member b is welded to the opening at one end to close this opening, the pair of clamping bodies 27' of the holding mechanism 6,
If 29' is shaped so that it can be clamped so as to close the opening at the other end of the workpiece a, as shown in FIG. It can be removed well as in one embodiment. In this case, the pair of clamping bodies 2
It is sufficient to operate the vibration mechanism 5 without rotating the workpiece a held by 7 and 29 by 180 degrees.

As described above, according to the present invention, the granular material is supplied into the workpiece, the workpiece is vibrated, and the granular material is used to remove the deposits attached to the workpiece. Since the work of discharging the particulate matter from the workpiece can be performed automatically and continuously afterwards, there is an advantage that the deposits can be efficiently and reliably removed.

[Brief explanation of drawings]

Fig. 1 is a partially sectional side view of a workpiece to which members have been welded, Fig. 2 is a schematic configuration diagram of the entire apparatus showing an embodiment of the present invention, and Fig. 3 is a similar diagram of the holding mechanism. 4 is a plan view of the conveyance path, and FIG. 5 is a sectional view of a holding member of a holding mechanism showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Conveyance path, 4... Supply mechanism, 5... Vibration mechanism, 6... Holding mechanism, 9... Granular material, 27, 2
7', 29, 29'... clamping body, a... workpiece.

Claims (1)

[Claims] 1. In an apparatus for removing deposits from a hollow workpiece whose opening has been welded and deposits have adhered due to the welding process, a conveyance path for conveying the workpiece and this conveyance path are provided. a supply mechanism for supplying granules into a workpiece being conveyed; a holding mechanism for holding the workpiece between a pair of clamping bodies so as to close a hollow portion in which the granules are accommodated; Removal of deposits in welding processing, comprising a vibration mechanism that vibrates the workpiece to remove deposits attached to the workpiece, and an inversion mechanism that reverses the workpiece and discharges particulate matter supplied inside the workpiece. Device.