JPS6251718B2 - - Google Patents

Description

[Detailed Description of the Invention] In manufacturing a coated arc welding rod, the present invention includes:
Regarding the configuration of the coating equipment that coats the core wire with flux, in particular, a large number of die blocks equipped with nipples and dies provided in the flux coating extrusion molding part of the coating equipment are arranged in a turret type, and the size of the arc welding rod to be manufactured can be adjusted. It is constructed so that the replacement of the dive block, which is necessary when switching or maintaining the dive block, can be performed extremely easily, and it is also constructed so that switching and replacement can be performed in a short time.

To continuously manufacture coated arc welding rods, a core wire is introduced into the tip of a flux extrusion molding device, and the wire is extruded while being coated with flux. The coating section of the flux extrusion molding apparatus is comprised of a core wire introduction guide nipple, a flux pressurizing reservoir section, and a die block equipped with a die. For example, FIG. 1 (partially cut away side view) shows an example of a die block provided at the tip of a flux extrusion device. 9, and the flux extrusion device 2 is constructed such that flux is extruded by a flux containing cylinder and a piston inserted into the cylinder. A flux reservoir 6 is formed in the die block 1, and a nipple 1a is provided projecting into the reservoir 6. A die support member 3 is attached to a flux discharge portion of the flux reservoir 6 on the nipple-directed side. A die 4 is provided on the supporting member 3 via a die holding member 4a, and the die holding member 4a is positioned by a plurality of (four in the illustrated example) adjustment bolts 5 provided around the supporting member 3. It is now possible to adjust. The core wire 7 is guided to the nipple 1a, coated with flux in the flux reservoir 6, and extruded through the die 4 to form a coated welding rod 8 while its outer diameter is regulated. In order to make the coating layer uniform, that is, to hold the core wire 7 at the center of the coated welding rod 8, the movement of the die 4 can be adjusted.

By the way, when changing the production type (size) of coated welding rods or performing maintenance on the die block, remove the mounting bolts 9 and remove the die block 1, and then clean the residual flux inside the die block 1. They are removed and cleaned, and the nipple 1a and die 4 are replaced manually. However, this kind of die block replacement work requires at least 30 minutes because it is manual work, and since die block 1 weighs nearly 45 kg, it is difficult for one person to handle it and two workers are required. For this reason, the implementation of conventional die block replacement work has had major problems in terms of both productivity and workability. From this point of view, when replacing the die block, it is recommended to place the die block for the changeover size or the die block that has been cleaned in advance near the die block that is in use, and automatically replace it when it is time to replace it to increase productivity. There has been a desire for a flux coating device of this type.
The present invention was arrived at as a result of intensive studies to satisfy these demands, and it is possible to replace one or more of the die blocks and switching die blocks in use.
It is constructed so that it is installed on the same rotating plate material, and the joint between the die block and the flux discharge part of the flux coating extrusion device can be attached and detached using a clamp device, so that the die block can be replaced extremely easily. It is.

The present invention will be described in detail below based on the drawings, but the drawings show one example of a specific implementation of the present invention, and the present invention is not limited to the illustrated example. The desired purpose can be achieved by changing the design or by using a device with the same function with a different configuration. FIG. 2 is a front view of a flux coating apparatus to which the present invention is applied, and FIG. 3 is a partially cutaway plan view of FIG.
and a coated welding rod 8 are additionally shown. Figure 4 is the second
5 is a sectional view taken along the cutting line - of FIG. 4 in the direction of the arrow, and FIG. 6 is a sectional view taken along the cutting line - of FIG. 3 in the direction of the arrow. In these figures, the flux coating device 10 of the present invention is constructed such that a bonding abutment seat 2a (FIG. 5) is attached to the flux discharge portion of the flux extrusion device 2, and a die block 12 is pressed against and held in close contact with this. The die block 12 and the abutment seat 2a are closely held together by a clamp device to be described later.
The die block 12 is constructed by combining the core wire introduction nipple 1a and the die block 1 provided with the die 4 as illustrated in FIG. 1 above. Reference numeral 11 in FIG. 2 indicates a clamping device, and the clamping device 11 is composed of arm rods 11a, 11b and a tightening/release actuating device 11c, which are pivotally supported by a support shaft 11d. It is attached to a pivot seat 11e provided on the extrusion device 2 side. The inside of each of the arm rods 11a, 11b is formed with a concave portion having an inclined surface, and the die lock 12 is moved to the above position by the tightening operation of the tightening/release actuating device 11c provided at one end side of the arm rods 11a, 11b. It is configured to be held in close contact with the abutting seat 2a. FIGS. 2 to 6 show the state in which the die block 12 is held under pressure, and when the release operation is performed, it is opened as shown in FIG. 8 (explanatory diagram of the operation in FIG. ). Furthermore, the tightening/release actuating device 1
1c is shown as having a cylinder and a piston, but the design can be changed freely, such as a motor screw type or a rack and pinion type. Further, the present invention is not limited to the arm rod pivot type, and may be similarly implemented with a clamp device in which the arm rods 11a and 11b are moved apart from each other to hold the die block 12 and the abutting seat 2a in close contact with each other.

On the other hand, a support shaft 14 is provided near the die block 12 and is perpendicular to the joint surface of the abutment seat 2a.
A rotary plate member 13 is attached to the front end side of the support shaft 14, and the support shaft 14 has a bearing 1 fixed to one end of a bracket 15 attached to the flux extrusion device 2 side.
6, it is freely supported so as to be movable in the axial direction. The rotating plate 13 is auxiliary formed with a rim or the like, and has a plurality of die block mounting portions formed around it, and is provided so as to rotate in parallel with the abutting surface of the abutting seat 2a. The figure shows two spare dive blocks 12a, 1.
2b is installed in advance on the rotary plate material 13, but it may be one piece or three or more pieces. Figures 2 and 3 show dive block 1.
2 shows a state in which the core wire 7 is introduced and the covered welding rod 8 is taken out, and in FIG. 3, a traveling support belt device 8a is additionally shown. That is, rotating plate material 1
3 holds both the moving die block 12 and the preliminary die blocks 12a and 12b in the same plane. Therefore, when replacing the die block, first open the clamp device 11 as described above, then move the die block 12 away from the abutting seat 2a, bring the spare die block 12a to the position of the die block 12, and move it to this position. The replaced die block 12a that has reached the abutment seat 2a
It is necessary to actuate it so that it approaches the side. Therefore, it is necessary to provide a means for moving the rotary plate member 13 back and forth in the direction of the support shaft 14 together with the support shaft 14, and a means for rotating the rotary plate 13 by 120 degrees in the illustrated example. That is, the reciprocating device is
A gripping member 14a rotatably engaged with the rear end of the support shaft 14 is provided, and a piston of an operating cylinder 17 is connected to the gripping member 14a. Therefore, when the operating cylinder 17 operates, the support shaft 14 is pushed out as shown in FIG. 9 (operation diagram in FIG. 4), and the rotary plate 13 also moves forward to remove the die block 12 from the abutting seat 2a. When released, it can be moved to the outside of the clamping device 11.

On the other hand, the rotating device for the rotary plate material 13 is composed of a disk 18 attached to a support shaft 14 and an operating cylinder 19. Balls 18a, 18a, 18a are mounted on the disk 18 at concentric distances at an angle of 120 degrees. Along with being supported, slits 18b, 18b, 18b, which are equally divided into three at 120 degrees, are formed around the periphery of the disk. The slit 18b serves to regulate and hold the rotational position of the support shaft 14, and is adapted to fit into the tip of a regulator 20a protruding from an operating cylinder 20 provided on the flux extrusion device 2 side. Further, the fitting portion of the regulator 20a is connected to the support shaft 14.
It is formed to be elongated in the axial direction of the support shaft 14, and is designed to maintain its fitted state during the reciprocating movement of the support shaft 14 (see FIGS. 9 and 6). In order to drive the rotation of the rotary plate 13, the actuating cylinder 20 is actuated to separate the regulator 20a from the slit 18b (see Fig. 7), and the actuating cylinder 20 is actuated to release the regulator 20a from the slit 18b (see Fig. 7). The disc 18 is rotated by 120 degrees by the operation of the provided operating cylinder 19, and the regulator 20a protrudes again to open the slit 18.
b, and the correct rotational position is regulated. That is, as shown in FIG. 7 (operation diagram in FIG. 6), the operating engager 19 provided at the tip of the piston of the operating cylinder 19
a engages with the ball 18a and rotates the disc 18 by 120 degrees, thereby rotating the rotary plate member 13.
The operating cylinder 19 is pivoted at its base, and since it tilts due to the rotational action, the cylinder 19 is provided with a restoring spring 19b. Due to this rotation, the used die block 12
reaches the position of the preliminary die block 12b, and the preliminary die block 12a comes to a position facing the abutting seat 2a. Next, the actuating cylinder 17 is actuated to move the support shaft 14 backward, thereby moving the die lock 12.
a to the abutment seat 2a, and by tightening the clamp device 11, the replacement die block can be held in close contact with the abutment seat 2a. In addition, the figure shows guide groove seats 15a, 15a provided on the other end side of the bracket 15 and the lower side of the flux extrusion device, respectively, in order to reliably guide the movement of the arm rods of the clamp device, and guide groove seats 15a, 15a are provided on the receiving side of the arm rods 11a, 11b, respectively. Projection 11 planted in
Although a device is shown that guides e and 11e by fitting them into the guide groove seats 15a, this may be omitted or other guide devices may be used if necessary. Further, each actuating means is shown as a cylinder actuating device, but may be a motor screw type or a rack and pinion type, and these operations are configured to be sequentially and continuously operated by an operation panel (not shown).

Since the flux coating apparatus of the present invention is constructed in this way, the die block to be used can be attached to the rotary plate material in advance and can be replaced fully automatically with a single operation button.
As a result, the replacement time can be reduced to about 1/4 of the conventional time.
A large increase in production can be expected, and most of the replacement work can be done automatically, making it possible to improve work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view for explaining the structure of a die block, FIG. 2 is a front view of a flux coating apparatus to which the present invention is applied, and FIG. 3 is a partially cutaway plan view of FIG. 2. Figure 4 is the right side view of Figure 2, and Figure 5 is the right side view of Figure 2.
The figure is a sectional view in the direction of the arrow along the cutting line - in Fig. 4, Fig. 6 is a sectional view in the direction of the arrow along the cutting line - in Fig. 3, Fig. 7 is an explanatory diagram of the operation of Fig. 6, and Fig. 8 is a sectional view in the direction of the arrow. FIG. 2 is a partial operation explanatory diagram, and FIG. 9 is a partial operation explanatory diagram of FIG. 4. DESCRIPTION OF SYMBOLS 1...Die block, 2...Flux extrusion device, 3...Dice support member, 4...Dice, 5...
...Dice adjustment screw, 6...Flux reservoir, 7...
... Core wire, 8 ... Covered welding rod, 9 ... Mounting bolt,
10... Coating device of the present invention, 11... Clamp device, 12... Dive block, 13... Rotating plate material,
14... Support shaft, 15... Bracket, 16... Bearing, 17... Operating cylinder for supporting shaft movement, 18...
...Disc, 19... Cylinder for rotational operation, 20...
...Regulator operating cylinder.

Claims (1)

[Claims] 1. A flux coating device that can easily replace the die block installed at the tip of the cylinder of the device for coating flux on coated arc welding rod core wire, and the die block installed at the tip of the flux discharge section of the flux coating extrusion device. The die block is configured to be tightly gripped by a clamp device that opens and closes in parallel to the tip surface, and the die block is
A plurality of them are attached to a rotating plate material, and the mounting is configured such that they are arranged at a certain distance from the rotation center point and on the same plane, and the rotating plate material has a die block installed on the rotation center point. 1. A flux coating device for a coated arc welding rod, characterized in that a flux coating device for a coated arc welding rod is provided with an orthogonal support shaft and is configured to move and rotate in a direction orthogonal to the clamp opening/closing operation direction via the support shaft.