JPS59232696A - Coater for coating material of coated electrode - Google Patents

Abstract

PURPOSE:To provide a titled device which eliminates the nuisance in coating by the residual gas in a flux by pressing the flux in a forming cylinder provided with vent holes to degas thoroughly the flux and forcing the flux into a flux cylinder which is exchangeable in position by rotation. CONSTITUTION:An electrode 48 delivered by rollers 47 passes through a coating head 42 and is coated with a flux extruded by a piston 40. The coated electrode is fed forward by a belt conveyor 43 and is dried while the electrode is traversed by a belt conveyor 44. The charged flux 56 on the other flux cylinder 30 side is pushed by cylinders 36, 39 to vent gas thoroughly from the flux through vent holes 49 during said time. The holes 49 are then closed 50 and a piston 35 is advanced to force the flux into a cylinder 30. The flux cylinders 30, 31 are brought to the extruding position by the rotation of a shaft 32. Since the flux is thoroughly degassed, the coating is satisfactorily accomplished and the generation of the nuisance such as blistering, offcentering, surface flawing, dislodging, etc. is obviated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an apparatus for coating a core wire of a coated arc welding rod with a coating material.

When manufacturing coated arc welding rods (hereinafter referred to as welding rods), a coating agent (hereinafter referred to as flux) mixed with desired ingredients and wet kneaded is applied around the core wire, and then sent to a drying process to be dried. It is well known that welding rods can be obtained by

However, it is required that the process from the wet kneading process to the coating process be efficient and that the flux be applied uniformly and sufficiently around the core wire (with sufficient first coat strength. First, An example of a conventional flux coating device will be explained based on the drawings.

Figure 1 shows the entire conventional coating equipment on the 2141st day.
.

This is a cross-sectional view, and the wet mixer is omitted, but in the figure, 1 is a flux chute that supplies and stores the flux sent from the wet mixer, and allows the extrusion cylinder 2 to cut out a predetermined amount at a time, and 3 is a flux chute. A flux molding and coating machine connected to the cutting position 1 of the chute 1, 4 is a base on which the molding and coating 4'lU 3 is installed, 2
o is a core wire feeder, 1st is a cross conveyor, and 19 is a transfer conveyor.

” The two-legged flux forming and coating machine 3 has a rotating shaft 9 supported on a base 4 by a rotating support 14, as shown in the figure.
Two rotating disks 12.13 with their centers fixed are provided, and the pair of flux cylinders 10.11 are held symmetrically across the rotating shaft 9 by the rotating disks 12.13. Flux cylinder 10.11
A pressurizing cylinder 5 for painting and a pressurizing cylinder 6 for molding are fixed to a base 4 at intervals on one end side (opposite side of the goo head). -tJ's Franks Gilinda 10
．． On the other end side of 11, the Franks Girinda 10.11
A forming presser cylinder 1G and a tie hand 17 are installed which fit the respective cylinders when the machine is stopped. The coating cylinder 5 also includes a pair of flux cylinders 10 and 1.
1 is provided at a position that coincides with the core of one flux cylinder IO or 11 when the cylinder 6 is stopped at a predetermined position, and the forming cylinder 6 is also aligned with the core of the flux cylinder IO or 11.
．． 11+! : Provided at a position that coincides with the b center. Furthermore, the molding cylinder and the flux cylinder 10 or 1
A flux receiver 15 is disposed between the flux shoe 1 and the flux receiver 15, which is integrated with the cutting opening of the flux shoe 1.

With such flux forming and the arrangement of the coating machine 3, the piston 7 of the coating cylinder 5 is inserted into the Franks cylinder 10 or 11 and the flux is transferred to the head 17.
At the same time, the screw I/n 8 of the other forming cylinder 6 passes through the flux receiver 15 and is inserted into the flux cylinder 10 or 11, where it is combined with the piston of the forming presser cylinder 16 to form the flux molded product. This means that 71 molding operations are required. Moreover, rotating disk 1
2.13 by 180 degrees, the pair of flux cylinders 10 and 11, which are arranged symmetrically across the rotation center line, can be moved to a position that coincides with the flux receiver 15 and the forming presser cylinder 16 (flux forming position). )
and a position corresponding to the tie hand 17 (flux coating position). The painting cylinder 5 and the forming cylinder 6 are generally hydraulic cylinders.

Also, a pair of flux cylinders 10. II 1r-,
The m-movement has a structure that allows the flux cylinder to accurately stop at a predetermined position. The core wire supply machine 20 is a core wire storage box 2
It consists of an OA and a foot roller 22, and the guide 1? The core wire is supplied to the die through the core wire kite at a desired speed. The direction in which the core wire is supplied and the direction in which the flux is supplied from the forming/coating machine 3 are arranged to be substantially perpendicular to each other.

In this way, a pair of flux cylinders 10. II is configured to be interchangeable by rotational operation, but the tip surface 21 that comes into contact with the da f head 1 of the Franks Girinda 10 is connected to the opposing tie.

Grooves for air release are provided on both sides.

- When coating with flux using the conventional coating equipment described in 2.2, the time from the completion of extruding 10 ton of flux to the start of extruding the next lot of flux can be shortened by using a pair of Franks Girindas. The operating rate has improved and productivity is high. However, since the forming flux is directly pressure-formed in the flank cylinder and lengthened by joining short circular companions,
It is pressurized and loaded with air mixed in due to gaps, molding flux dripping, etc. This Franks Girinda 18
It is rotated 0° and used for painting. Therefore, the air trapped in the molding flux is vented in the gap 21 between the grooved surfaces of the flux cylinder and the head, but it is not sufficiently vented. In this case, the following problems arise in the painting process and the welded body.

1. The amount of air in the flux, jl, depends on the uneven distribution of 11 people.
C coating becomes eccentric coating.

2. The surface of the welded body partially expands and its 1°″i+
+ minute is a little less than 1 euro, and surface scratches are likely to occur.

3. The degree to which the flux adheres to the core wire, the so-called degree of adhesion, is poor, causing the coating to fall off.

If air remains in the forming flux in this way, it will have a negative effect on the painting work and the welded body, so a forming flux with a long cylindrical body and high density that does not contain air at all is required.

In addition, there is a technology to continuously form and paint flux using a screw in a vacuum, but it is not easy to supply a fixed amount and constant pressure of flux to the guide, and it is necessary to use a homogeneous, high-quality welding rod. There are problems in producing efficiently.

The present invention was developed to solve the above-mentioned problems, and its gist is that the main part has a larger inner diameter than the flux cylinder and has a plurality of air vent holes, and a circular
A forming cylinder with an F drawing part is installed at the flux forming position to create a long forming flank that does not contain air, and this is used to coat the core wire with flux. In the coating equipment, the coating forming position is switchable between the coating forming position and the coating coating position, which has a coating head at the front that discharges the coated welding rod, and the coating forming position is At a rear position of the coating cylinder, a forming cylinder having a main part with an inner diameter larger than that of the coating cylinder and a circular drawing part is placed axially along the main part of the forming cylinder. to form multiple air vent holes that can be opened and closed.
Further, a molding pressure cylinder is provided at the rear position, and a pressure cylinder for painting is provided at the rear position of the coating material cylinder at the coating material coating position, and a drive for adjusting the position after nij is provided for each of the pair of coating material cylinders independently. 4. Turn the device on its side. ν
The characteristic is in the coating coating equipment for coated arc welding rods.

Next, the structure of the coating material coating apparatus of the present invention will be explained using FIG. 3.4.

FIG. 3 is an overall plan view including a partial cross section of the coating agent coating apparatus of the present invention, and FIGS. 4 (a), (b), (/\).

(d) is a plan view showing the process of forming the hula/length.

In the figure, numeral 23 is a chute that supplies the franks sent from the wet mixer to the forming cylinder 54, and the forming cylinder 54.
A flank cylinder 28 and a forming pressure cylinder 36 are provided before and after the forming cylinder 54. 2
Reference numeral 8 denotes a flux cylinder in the flux forming position that rotates around the Franks cylinder 28 and the rotation 411 (32 via the connecting rod 34). There is a coating pressure cylinder 41, 48 a core wire feeder, 43 a cross conveyor, and 44 a welding rod conveyor.

In addition, the flux cylinders 28 and 29 are
Air cylinders 33', 33', which are driving devices for sliding the flank cylinders 28 and 29, are held by the flank cylinder holders 30 and 31, and the rotation shaft 32 The rotating part 34 is rotated 180 degrees by a drive device (not shown) around , and the flux forming position and the flux coating position: ξ
It has a structure in which it stops accurately alternately. The flux cylinder 28 at the coating material forming position is moved to the rear position (rightward in the drawing) by the air cylinder 33 and joined to the tip 27 of the forming cylinder 54. The forming cylinder 54 has a cylindrical main portion 25. whose diameter is larger than the inner diameter of the flux cylinder 28. It has a conical throttle part 26 having a predetermined angle of 0, and a short cylindrical part having the same diameter as the inner diameter of the flank cylinder 28 at the tip. In addition, a plurality of (four in the figure) air vent holes 49 are bored in one part of the main part 25 of the molding cylinder 54 along its axial direction, and each of these air vent holes 49 is It can be opened and closed by a stopper 52 that is raised and lowered by a corresponding number of cylinders 50 installed on one side. A molding pressure piston 35 and a molding pressure cylinder 36 (hydraulic type) are provided at the rear of the molding cylinder 54. Furthermore, a forming presser cylinder 39 is coaxially located at the +iij position of the flat screw link 28. A molding presser piston 37 is provided.

Next, the flux cylinder 29 in the flux coating position
is held by the flux cylinder holder 31 and connected to the flux cylinder 28 and the gouey head 42 by a sliding air cylinder 33'. A painting pressurizing piston 40 and a painting pressurizing cylinder (hydraulic) 41 are provided at a rear position of the flank cylinder 29.

Fee 1' roller 47 of the core wire feeder 46. Kite pipe 48. Daihen l? '42. Crosscon (A43-1)
One side is installed horizontally in the same i1u+ manner, and the flux forming position is below the guide pipe 48.

A flux cylinder 28. is provided 411 at the flux forming position described above. Forming cylinder 54, forming pressure piston 35. Figure 4 (a), (b), (c), (about forming flux with forming presser piston/37)
d).・At the same time when a predetermined amount of flux 58 corresponding to the internal volume of the flux cylinder 28 is supplied, the 23 force 1 is also
8 is connected to the molding cylinder 54 by an air cylinder 33, and the molding presser piston 37 is moved to the leading edge 27 of the flux cylinder 28 by a presser cylinder (hydraulic) 38 as shown in FIG. 4(A). Go ahead and wait. The molding pressure piston 35 is advanced by +iij, and the full-socket 56 is added 1i-L, as shown in FIG. 4 (b).
The 25th cylindrical main part of the forming cylinder 54 is the piston 35
As it is press-fitted, the air in the flank is gradually released from the open air vent hole 48. If the detection means (trowel) detects that the flux pressure has reached a predetermined value (air in the flux is almost completely absent),
Each shilling 50 is actuated 119 times and the stomper 52 is used to open the hole 4.
9 to prevent flux from flowing out of the forming cylinder 54. In the next step (7), the flax in the molding cylinder 54 is squeezed to a diameter of 'i'Il at the conical drawing part 26, and is extruded from the molding cylinder 54 as a flux. The molded flux is stopped by the molding presser piston 37 at a pressure slightly lower than the pressurizing force of the molding pressurizing piston 35, and the molding presser piston 37 is sequentially retreated (to the left position in the drawing) to start flux molding. The entire flux cylinder 28 is filled with the flux as shown in FIG. 4(d), and the flux forming process is completed.

On the other hand, the flux cylinder 29 at No. 1δ at the flux coating position slides against the Franks cylinder holder 30 through the flux cylinder 29 and the cylinder holder 30 and is press-connected to the die cylinder 42, and the piston 40 located at f1h after the Franks cylinder 29 moves forward. Then, flux pressure 1) Pushes out the molding flux inside the lid 29 and coats it on the core wire.

In this way, as soon as the flux molding and painting of Franks Gilinda 28.29 is completed, the famous piston retreats,
Furthermore, the air cylinders 33, 33' are used to connect the flux cylinders 28, 29 and the forming cylinders 54. Thailand Hendo 42
After disconnecting the flux cylinder 28.2
8 rotates 180 degrees around a rotating shaft 32 connected to a drive source (not shown) and stops at a predetermined position, and the next flux molding coating is immediately started in the same manner as described above. Therefore, the flux cylinders 28 and 29 are rotated alternately between the coating material forming position and the coating position, and are interchanged to perform continuous coating.In the flux forming process after the 62nd time, the circle of the forming cylinder 54 filled with the previous flux forming is filled. G1f
Due to the flux 56' remaining in the f1 constriction portion 2G, the air density at the tip of the molded sill 54 becomes higher.

The above illustrated example shows an example of the present invention, and may be modified as appropriate within the scope of the technical idea of the present invention. For example, air bleeding, changing the opening/closing mechanism of the hole 49, installing the air cylinder 33 on the base 55J-,
8.29 is stopped and air cylinder is activated when 1=! It is possible to appropriately adopt a change to a structure in which hi+ and Franks Girinda are connected and slid. Note that although the chute 23 is sunken, it is shown in the drawing for convenience.

Next, the operation of applying flux to a welding rod core wire using the apparatus of the present invention will be described.

First, the Franks cylinder 28 is located at the rearmost part (41A) of the molded pressure piston 35 and is connected to the air cylinder 33.
The molding cylinder 54 is joined to the molding cylinder 54, and the molding piston 37 is in the frontmost position (FIG. 4A). ! ::in,
A predetermined amount of flux 56 is thrown in from the chute 23. Next, the molding pressure piston 35 is moved forward to pressurize and charge the flux into the main fill 25 of the molding cylinder 54, and release the air in the flux from the air vent hole 48. The hole 49 is opened by 1-shi 1 until the flux pressure reaches a predetermined pressure.
is closed as shown in FIG. 4(c).

In this way, the IYfl in the flux shilling 28
The flux molded to +i is moved, and the flux molding is completed at the molding pressurizing piston 35 or the most forward jXJ (fu) shown in FIG. The charged flux cylinder 28 is slid by the air cylinder 33 (for example, by several n+m, rotated 1'i (capable distance 1), and is connected to the forming cylinder 54, released, and rotated 1Ijb.
32 rotates to shear the integrated forming flux, rotates 180 degrees and is replaced with the flux cylinder 29 located at the 1st position of the Franks painting machine, and stops at the flux painting position, and the Flanks cylinder 28 is moved to the flux painting position. Rotates to the flux forming position and stops. The flax sill 29 moved to this flux coating position is molded and filled with flax by the same operation as described above, but the high-density flux 56 from the previous franks molding is applied to the tip drawing part 2G+ of the forming cylinder 54. Since the particles remain in a concentrated state, the degree of air leakage at the front part of the forming cylinder 54 becomes higher, and the deaeration efficiency becomes higher from the second time onwards.

- On the other hand, the flank cylinder 28 which has been moved to the flank painting position is driven by the air cylinder 33 to slide forward inside the flank cylinder holder 30 and joined to the tie head 42. At the same time as the joint is detected, the painting pressure screw I/n 40 advances and is inserted into the flux sill 28, and by pressurizing the flux, the flux passes through the tie and throat 42 and is extruded from the tip die. Ru. On the other hand, the core wire is continuously fed from the core wire feeder 46 to the tie at a predetermined speed concentrically to the die at the tip of the clasp 1. The welding rod is coated uniformly around the core wire and extruded from a die to become a coated welding rod, which passes through a cross conveyor 43, collides with a contact plate 45, is placed on a conveyor 44, and is sent to the next process.

At the same time that all the flux in the flux cylinder 28 at the flux coating position is pushed out under pressure, the coating pressurizing piston 35 moves back and is no longer inserted into the flux cylinder 28, and the flux cylinder head 42
The connection between the two parts is also released and it becomes possible to rotate and move. During the time that the flux cylinder 28 is in the flux coating position, the flux cylinder 29 in the flux forming position has also completed the entire process of flux forming and filling and is in a state where it can be rotated.
They are rotated interchangeably and the above operation is immediately repeated.

The present invention uses the structure and operation described in detail above to coat the core wire with flux, and the forming cylinder is structured to naturally degas during flux forming, so after degassing, it is press-formed to release air. It is possible to load molding flux with a high sonic intensity without any contamination into the flux cylinder.

The molding flux can be used for painting (co-supplied) while being loaded into the flux cylinder.

That is, in order for the flux in a loose state that has been wet-combined to become an ideal forming flux, the flux that is pressurized in the circular Gf drawing part of the forming sill flows and becomes a dense forming flux.

One cylinder of flux passed through this constriction (e.g.
The elliptical rod with a length of 1 m and a flux Ij of 150 to 60 Kg has a uniform sound intensity and does not contain air, so it can be used as a coated welding rod to produce a uniform coated outer diameter without eccentricity, resulting in high-quality welding. You can paint sticks.

The preferable angle θ of the constricted portion of the molded sill of the present invention is in the range of 50 to 80°. If the aperture angle exceeds 90°, the flow of flux will become uneven, and the flow will be rounded at the corners.
This results in uneven density. -force, 50°
When it goes below , the distance l of the conical diaphragm section increases. lt is long, and as a result, there is only suppression and no flow effect, and there is also a large amount of residual flux, resulting in poor molding efficiency. In addition to this angle θ, the aperture ratio of the conical aperture portion is preferably 60% or more.

As described in detail below, the coating coating device of the present invention pressurizes and draws flux under deaerated conditions to form a long cylindrical shaped flux, which is immediately coated (as described above). <Knowledge of the prior art 5) It solves the various problems of cylindrical forming flux, and allows extremely high performance and very good coating. In other words, there is no variation in the outer diameter of the welding rod, eccentricity, cracking of the coating, etc. that occur with conventional molded flux coating, and the appearance of the welding rod is beautiful, resulting in a high-quality welding rod that can be coated and a higher yield. It is also a big direction] -.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view showing a specific example of a conventional coating device, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a plan view showing an embodiment of a coating device according to the present invention, and FIG. (a), (b), (
/\), (2) is a sectional view explaining the movement f1 of the device of the present invention. 23... Chute, 24... Seal, 25... Main part, 26... Conical constriction part, 28 .29...Flux cylinder, 30.31...Flux cylinder holder, 32...Rotating shaft, 33.33'...Air cylinder, 41...Painting pressure cylinder, 42...Die hend, 48 ...Air vent hole, 5o...Cylinder, 5
4... Molding cylinder, 56... Flux patent applicant Representative patent attorney Tomoyuki Yan (and one other person) Procedural amendment (voluntary) 11 February 2, 1958 Commissioner of the Japan Patent Office Kazuo Wakasugi 1. Indication of the case 1984 Application No. 106706 2. Name of the invention Coating agent coating device for coated arc welded bodies 3. Relationship with the person making the amendment 311. Applicant's address 3 Tsukiji, Chuo-ku, Tokyo. Name of No. 5-4] Tetsu Welding Kogyo Co., Ltd. 4, Agent 6, Contents of amendment (1) The formula on page 18, 2-31 of the specification is corrected as follows. Cross-sectional area of main part

Claims (1)

[Claims] In a coating material coating device, a pair of coating material cylinders are held interchangeably between two positions: a coating material forming position and a coating head discharging a geared welding rod at the front position. At the coating material forming position, there is provided a forming cylinder which has a main part with an inner diameter larger than that of the coating material cylinder and a circular 91F constriction part coaxially at a rear position of the coating material cylinder, and the main part of the forming cylinder is A plurality of air vent holes that can be opened and closed along the ++1 direction are formed, and a molding pressure cylinder is installed at the rear position, and a pressure cylinder for painting is installed at the rear position of the coating cylinder at the coating application position. A coating agent coating device for a coated arc welding rod is further characterized in that a driving device for longitudinal position adjustment is provided independently on the pair of coating agent sills.