JPH0370599B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a flux cylinder cleaning device for an automatic coating machine for coated welding rods, and in particular, to completely and quickly clean the inside of the flux cylinder when switching flux brands. This relates to a device for

(Prior art) When manufacturing coated welding rods, a device is used to apply a predetermined flux around the core wire, and a flux cylinder filled with flux is pressurized by a hydraulic piston to provide coating at the tip of the flux cylinder. An apparatus is known in which the core wire is extruded from the die of the coating head and simultaneously supplied to the die of the coating head to coat the outer periphery of the core wire with flux.

Figure 3 shows a typical example of an automatic coating machine. As shown in the figure, two flux cylinders 41,
42 is attached to a rotating disk 43 so that it can be rotated and interchanged between the two positions of the molding position and the coating position, and a molding pressure cylinder 44 and a molding presser cylinder 4 are installed on both sides of the axis of the flux cylinder at the molding position.
5, a coating apparatus is used in which a coating pressure cylinder 46 and a coating die head 47 are arranged on both sides of the axis of a flux cylinder at the coating position.

Therefore, when changing the brand of flux, it is necessary to completely remove the flux remaining in the flux cylinder.

Conventionally, as a cleaning device for the flux cylinder in the above-mentioned type of automatic coating machine, the
Examples include those shown in Japanese Patent No. 57-84772. That is, as shown in FIG. 3, a cleaning cylinder 48 is installed at an intermediate position between the molding position and the coating position, and a cleaning cylinder 48 that can be inserted into the flux cylinder is inserted into the tip of the rod of the cylinder. Examples of structures in which members are attached are known.

(Problem to be Solved by the Invention) However, since a thin layer of flux adheres to the inner surface of the flux cylinder and forms a hardened layer, the above-mentioned cleaning member simply reciprocates to clean the inner surface of the flux cylinder. It has been difficult to completely remove residual flux using the type of cleaning equipment used. Therefore, in order to completely clean the flux cylinder, manual labor is still required.

In view of these circumstances, the present invention provides a flux cylinder cleaning device that completely automates the cleaning of flux cylinders, provides a perfect clean state with no residual flux, and can quickly carry out all operations. The purpose is to provide

(Means and operations for solving the problem) The configuration of the present invention to achieve this object is as follows. That is, in a flux cylinder cleaning device for a coated welding rod coating device, which is equipped with two flux cylinders that are rotatable and interchangeable between two positions, a forming position and a coating position, A hollow shaft that can move back and forth in the axial direction of the flux cylinder and rotate around the axis is provided at a position corresponding to an appropriate rotational intermediate position, and a cleaning brush is attached around the tip of the hollow shaft,
Flux cylinder cleaning for a coated welding rod coating machine, characterized in that an injection nozzle communicating with the hollow part of the shaft is attached to the top of the hollow shaft, and the rear end of the hollow shaft is connected to a switchable cleaning water/air supply source. It is a device.

As described above, the present invention uses a combination of the cleaning brush that can move and rotate in the axial and circumferential directions of the flux cylinder and the cleaning water jetted from the nozzle to completely clean the inside surface of the flux cylinder. The water used in the process is blown away using high-pressure air to maintain the flux in the desired properties.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

As shown in FIG. 1, a cleaning device 19 of the present invention
is installed at an appropriate position (cleaning position) corresponding to a predetermined intermediate position of the flux cylinders 12 and 13, which are rotatable between two positions by the rotary shaft 11. 14 is a molding pressure cylinder, 15 is a painting pressure cylinder, 16 is a molding cylinder, 1
7 is a die head, and 18 is a base on which these are mounted. An example of the structure of this cleaning device will be described based on FIG.

As shown in the figure, a hollow ball spline shaft 22 (hereinafter simply referred to as the hollow shaft) having a cleaning brush 21 fixed to its tip extends on the same axis as the flux cylinder at the cleaning position. The brush 21 is preferably made of plastic.
Further, a jet nozzle 23 is provided at the top of the hollow shaft 22, and the nozzle 23 communicates with a passage 24 in the shaft and directs the fluid (cleaning water or air) fed through the passage into the flux cylinder. It is held at an angle that allows it to be sprayed toward the wall. Further, the rear end of the hollow shaft 22 is connected to a flexible hose 26 via a rotary joint 25.
6 is connected to water and air supply sources via a switching valve (not shown).

Further, the hollow shaft 22 needs to rotate around the shaft and move back and forth in the axial direction. First, as shown in the figure, the rotation mechanism of the hollow shaft 22 is provided with a gear 31 on the hollow shaft side that meshes with a gear 30 provided on a screw shaft 29 connected to an electric motor 27 via a belt 28. Since the gear 31 must transmit only the rotation of the hollow shaft 22 and automatically allow the axial movement of the hollow shaft 22, the gear 31 and the hollow shaft 22 are connected via a ball spline bearing 32. There is. 33 and 34 in the figure are bearings on the screw shaft side, 35,
36 is a bearing on the hollow shaft side.

On the other hand, as shown in the figure, the forward and backward movement mechanism for the hollow shaft 22 is exemplified by a type in which a forward and backward movement supporter 37 that is screwed into a threaded portion on the outer periphery of the screw shaft 29 is fixed to the hollow shaft 22 via a bearing 38. . The bearing 38 is fixed in the axial direction of the hollow shaft 22, but has a structure that allows the shaft to rotate freely. Further, the screw shaft 29 is held on the base 39 by the aforementioned bearings 33 and 34, and the electric motor 27 is also attached to the base 39. Therefore, the hollow shaft itself is also held on the base 39 via the rotation transmission mechanism, the forward and backward movement mechanism, and the screw shaft 29.

In the illustrated example, the rotation and forward/backward movement of the hollow shaft 22 are
Although it is performed using two electric motors 27,
It goes without saying that the present invention is not limited to this, and may be operated by separate drive systems. Moreover, it is also possible to employ other known structures for the rotation and forward/backward movement mechanisms themselves.

To explain the operation of the device of the embodiment, when it becomes necessary to clean the flux cylinder due to a change in the brand of flux, the flux cylinder 12 or 13 is rotated to the cleaning position so that it is on the same axis as the hollow shaft 22. Stop at a position. Next, when the electric motor 27 is activated and the screw shaft 29 is rotated, the forward/reverse supporter 37 advances toward the flux cylinder, advances the hollow shaft 22, and rotates the cleaning brush 21 at the tip. When the brush 21 enters the flux cylinder in this state, cleaning water is ejected from the injection nozzle 23.

In this way, the cleaning brush 21 advances in the axial direction while rubbing the inner wall surface of the flux cylinder, and at the same time sprays cleaning water from the nozzle.
The flux remaining on the inner surface of the flux cylinder is completely removed. When cleaning is completed, the switching valve is switched to jet high-pressure air from the jet nozzle 23 to remove moisture that will affect the properties of the flux next time. For example, cleaning water may be ejected when the hollow shaft moves forward, and high-pressure air may be ejected during backward movement.

(Effects of the Invention) As described above, according to the present invention, the flux cylinder can be cleaned automatically and in a short time, and the flux used in the previous painting operation can be completely removed without leaving any residue. . This makes it possible to efficiently perform tasks such as switching flux brands, and greatly contributes to the high-mix, low-volume production system of coated welding rods.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an outline of a coated welding rod coating device equipped with a cleaning device of the present invention, Fig. 2 is a sectional view showing an example of the cleaning device of the present invention, and Fig. 3 is a conventional flux cylinder. FIG. 1 is a schematic diagram of a coating device equipped with a cleaning device. 12, 13...flux cylinder, 19...
... Cleaning device, 21 ... Cleaning brush, 22 ... Hollow ball spline shaft, 23 ... Spray nozzle, 2
4...Hollow passage, 26...Flexible hose,
27...Electric motor, 29...Screw shaft, 32...
Ball spline bearing, 37... Supporter for forward and backward movement, 39... Base.

Claims (1)

[Claims] 1. Rotating and rotating between two positions: molding position and painting position.
In a flux cylinder cleaning device for a coated welding rod coating device comprising two interchangeable flux cylinders, the flux cylinder is placed at a position corresponding to an appropriate rotational intermediate position between the two positions of the flux cylinder. A hollow shaft is provided that can move back and forth in the axial direction and rotate around the shaft, a cleaning brush is attached around the tip of the hollow shaft, and an injection nozzle that communicates with the hollow part of the shaft is attached to the top of the hollow shaft. A flux cylinder cleaning device for a coated welding rod coating machine, characterized in that the rear end of the hollow shaft is connected to a switchable cleaning water/air supply source.