JPH09141158A - Apparatus for applicating lubricant to welding wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for applicating lubricant to a welding wire having a wipe-off member and a lubricant applicating member withstanding long-time use and made economical and stable in the adhesion amt. of a lubricant. SOLUTION: A lubricant applicating apparatus is equipped with a wipe-off roller pair 31 wherein a pair of wipe-off rollers 32 having wipe-off members 38 attached to the outer peripheral surfaces thereof hold a running wire W, an applicating roller pair 51 wherein a pair of the applicating rollers positioned on the downstream side of the wipe-off pair 31 in a wire running direction A and a pair of applicating rollers having lubricant applicating members 53 attached to the outer peripheral surfaces thereof are arranged so as to hold the running wire W, and roller feed drive devices 41 respectively sending the wipe-off roller pair 31 and the applicating roller pair 51 in the roller axis direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding wire lubricant applying device for continuously applying a lubricant to the surface of a running wire.

[0002]

2. Description of the Related Art At the welding site, if the conduit tube from the wire feeding motor to the welding torch is long or bent, the wire feeding resistance increases. In addition, the welding wire easily induces discoloration and rust, which also increases the feeding resistance. If the feeding resistance is large, the wire may not be fed smoothly and the welding arc may become unstable, which is one of the causes of a decrease in the efficiency of welding work. For this reason, a lubricant having functions such as lubrication and rust prevention is attached to the wire surface.

The conventional lubricant applying device cleans the wire surface by sandwiching the traveling wire with a pair of flat felts to wipe off dirt on the wire surface and deposits such as copper powder, and then impregnating the lubricant oil. The felt was applied with an appropriate amount of new oil on the wire surface. Currently, the wire traveling speed is 1
The speed is extremely high, from 000 to 1500 m / min. As a result, dirt and copper powder on the wire surface are often brought in, which adheres to the felt and impairs the original purpose of cleaning the wire surface, thus reducing the durability of the wiping felt and the lubricant-coated felt. It was falling. Therefore, it was necessary to move the contact position of the felt with the wire to the next new contact position at a short time interval. Currently, the felt is moved per spool (wire length: about 2700 m). For example, if the wire traveling speed is 1300 m / min, the felt must be moved in about 2 minutes.
Therefore, it is desirable to move the felt automatically, as the felt must be moved frequently.

As a lubricant coating device for automatically moving the felt, there is a liquid coating device for welding wire surface, which is disclosed in Japanese Utility Model Publication No. 57-86655. This device is provided with a plate-shaped felt, a sandwiching plate that sandwiches the felt under pressure, and a linear head mechanism that moves the pressing device in the direction of 90 ° with respect to the wire traveling direction. In this device, the felt is moved laterally at a predetermined pitch at preset time intervals.

[0005]

In the above-mentioned conventional lubricant applying device, the felt is consumed so much that it takes a long time to replace the felt, and the felt consumption is large, so that the cost of the felt becomes high. . Therefore, the above-mentioned lubricant application device is not economically viable at present.
Further, the felt brings in dirt or copper powder and impairs the original cleaning effect, so it is necessary to always move it to a new position. In other words, stains on the surface of the wire cause unevenness in the color tone of the finished product, resulting in deterioration of quality.

An object of the present invention is to provide a welding wire lubricant applying device in which the wiping member and the lubricant applying member endure long-term use, and which supplies an economical and stable wire in quality. To do.

[0007]

The lubricant applying device of the present invention comprises a wiping roller pair, an applying roller pair, and a roller moving device. The pair of wiping rollers is arranged so as to sandwich a wire running by a pair of wiping rollers having a wiping member attached to the outer peripheral surface thereof. The coating roller pair is located on the downstream side of the wiping roller pair in the wire traveling direction, and is arranged such that a pair of coating rollers having a lubricant coating member attached to the outer peripheral surface sandwich the traveling wire. The roller feed driving device feeds the pair of wiping rollers and the pair of application rollers in the roller axial direction.

It is desirable that the wiping roller and the application roller be rotationally driven. In the case of driving, it is desirable that the wire is rotationally driven in the direction opposite to the wire traveling direction. When the wiping roller is rotated in the opposite direction, the contact resistance between the wire and the wiping member increases, which acts to squeeze the deposits and dirt on the wire surface. When the coating roller is rotated in the opposite direction, the contact resistance increases in the same manner as above, and the lubricant is pressed and adhered to the wire surface to increase the effect of the lubricant penetrating into the concave portion of the wire surface. The rotation speed is 0.5-5 rev / min, depending on the diameter of the wire.
It is about. The wiper roller pair and the application roller pair may have roller axes parallel to each other or orthogonal to each other. By making the roller axes of the wiping roller pair and the application roller pair orthogonal to each other, the wire can be cleaned more uniformly.

As the wiping member and the lubricant applying member, a thick cloth-like material such as felt or nonwoven fabric, or a soft and porous material is used. If the wiping member and the lubricant applying member are too soft or too hard, the wiping member and the lubricant applying member become unfamiliar with the wire surface, and the wiping effect and the lubricant applying effect sharply decrease. From this point, when felt is used as the wiping member and the lubricant applying member, the felt is 80% or more of wool,
Density is 0.25 to 0.35 g / m ³ , felt thickness is 5
~ 8 mm is suitable. The wiping member and the lubricant applying member are detachably attached to the roller body by tightening them with a band or the like. Since the wiping member and the lubricant applying member are removed together with the roller body and replaced with a new roll prepared in advance, the working time is shortened. The outer diameter of the wiping roller and the application roller is 100.
A length of ~ 150 mm and a length of 100-150 mm is suitable.
In addition, the distance between the wiping roller pair and the lubricant application roller pair should be as close as possible in order to make the device compact, but in consideration of efficiency of roller replacement work, the distance between the center of the roller pair is: 200 to 250 mm is preferable. The lubricant is continuously or intermittently supplied to the lubricant applying member. As the lubricant, a lubricating oil having a rust preventive function is used. Well-known lubricants such as vegetable oils, animal oils, mineral oils and synthetic oils are used as the lubricant.

The roller feed driving device intermittently or continuously moves the wiping roller and the application roller in the roller axial direction. The movement pitch is a wire diameter or slightly larger than the wire diameter. Movement speed is 100-300 mm / min
It is about. As the roller feed drive device, a combination of a rotary motor and a rack and pinion mechanism or a screw mechanism, a linear motor, or the like is used to move the moving table that supports the roller pair.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an example showing an embodiment of the present invention and is a schematic configuration diagram of a lubricant applying device.

The lubricant coating device comprises a wiping unit 1 and a coating unit 2 arranged on the downstream side of the wiping unit 1 in the wire traveling direction A.

The wiping unit 1 is provided with a pedestal 11, on which a movable table 15 which is reciprocated by being guided by a guide plate 12 of the pedestal 11 is mounted. A stand 19 is provided on the substrate 16 of the moving table 15. The stand 19 is provided with a movable bearing block 21 and a fixed bearing block 22 below the movable bearing block 21. The movable bearing block 21 can be moved up and down, and the vertical position of the movable bearing block 21 is adjusted by an adjusting screw 24. Wire W by wiping roller 32
The pressure applied to the movable bearing block 21 is adjusted in the vertical position. A motor 28 with a reducer is attached to the back of the movable bearing block 21 and the fixed bearing block 22. Movable bearing block 21 and fixed bearing block 2
2 holds a wiping roller 32 rotatably, respectively. Output shaft of motor 28 with reduction gear (not shown)
The roller shaft 35 of the wiping roller 32 is connected to the. The wiping roller 32 has a flange 34 near the roller axis.
Is provided with a roller body 33. A cylindrical wiping felt 38 is fitted into the roller body 33. The wiping felt 38 is sandwiched between the flange 34 and a pressing flange 36 attached to the tip of the roller body, and the pressing flange 36 is fixed to the roller body 33 with bolts 37. Also, wipe felt 38
The outer peripheries of both ends are fastened with bands 39, respectively. The wiping felt 38 is removable. The wiping rollers 32 are paired up and down to form a wiping roller pair 31. The speed reducer-equipped motor 28 rotationally drives the wiping roller 32 in a direction opposite to the wire traveling direction A.

A roller feed driving device 41 is provided below the mount 11.
Is arranged. The roller feed drive device 41 includes a reversible motor 42 and a gear box 44. The gear box 44 incorporates a rack and pinion mechanism.
The output shaft of the reversible motor 42 is connected to a pinion (not shown) of the rack and pinion mechanism, and the tip of the rack 46 of the rack and pinion mechanism is connected to the connecting plate 17 extending downward from the tip of the moving table 15. It is connected to the lower end.

The structure of the coating unit 2 is almost the same as that of the wiping unit 1. The same members of the coating unit 2 as those of the wiping unit 1 are designated by the same reference numerals, and detailed description thereof will be omitted.

The coating unit 2 includes a lubricant coating roller 52.
Are attached to the movable bearing block 21 and constitute a lubricant application roller pair 51. Like the wiping roller 32, the lubricant application roller 52 also has a lubricant application felt 53 attached to the roller body 33. Further, the coating unit 2 includes a lubricant supply device 55. In the lubricant supply device 55, a needle valve 58 is connected to a lubricant tank 56 via a pipe 57. The needle valve 58 is arranged immediately above the lubricant application roller 52 and adjusts the amount of lubricant dripped.

In the lubricant applying device constructed as described above, the wiping roller pair 31 and the applying roller pair 51 are set so that the wire W is sandwiched between the rollers 32 and 52 at a position apart from the bearing blocks 21 and 22 side. Has been done. When the work is started, the wire W is wound by a wire winding device (not shown), and proceeds in the direction of arrow A. The wire W is
First, the wiping roller pair 31 wipes off dirt on the surface and deposits such as copper powder to clean the surface. Next, coating roller pair 5
In 1, the lubricant is applied to the wire surface. The lubricant is dropped from the needle valve 58 onto the surface of the application roller and impregnated in the lubricant application felt 53. The wiping roller pair 31 and the coating roller pair 51 are advanced by the roller feed drive device 41 in the direction B orthogonal to the traveling direction A of the wire W.
Therefore, as the wire W travels, the contact position between the felt surfaces of the rollers 32 and 52 and the wire W gradually moves in the right-hand direction in FIG. 1, and the wire W always comes into contact with the fresh felt surface to wipe off dirt. Lubricating oil is applied. When the rollers 32 and 52 rotate once, the rollers 32 and 52 are moved in the roller axial direction at a pitch corresponding to the diameter of the wire W. If the entire surface of the felts 38, 53 has been used to wipe or apply lubricant, replace with new felt. To replace felts 38 and 53, bolt 37
Is removed from the roller main body 33, the pressing flange 36 is removed, the band 39 is removed, and the felts 38 and 53 are extracted from the roll main body 33. Then, a new felt is fitted into the roll main body 33, held by the holding flange 36, and tightened by the band 39 to be fixed.

FIG. 2 shows another embodiment of the present invention. The wiping roller pair 61 and the application roller pair 64 are
The roller axes are arranged so as to be orthogonal to each other.
When the roller axes are orthogonal to each other in this manner, the surface of the wiping roller 62 for wiping the wire surface and the surface of the applying roller 65 for applying the lubricating oil are displaced by 90 °. Therefore, the left and right side surfaces of the wire are sufficiently wiped by the wiping roller pair 61, but when the upper and lower surfaces are not sufficiently wiped off, the coating roller pair 64 wipes the upper and lower surfaces of the wire, so that the entire circumferential surface of the wire becomes clean. .

[0019]

According to the present invention, the welding wire always contacts new parts of the wiping member and the lubricant applying member. Therefore, the wire surface is constantly wiped off by the clean surfaces of the wiping member and the lubricant applying member, and the lubricant is applied, so that the lubricant is applied stably and uniformly. In addition, the color tone of the wire surface is beautiful, the wire feedability is stable during field welding, and rust progresses slowly even if the welding wire is left for a long time. Further, since the contamination in the conduit tube through which the welding wire passes is reduced and the clogging of the tip is eliminated, the workability of welding is significantly improved. Furthermore, the life of the wiping member such as felt and the lubricant applying member is significantly improved as compared with the conventional one. According to the experiment, the life of the wiping member and the lubricant applying member of the present invention is about 1 as compared with the conventional one.
It has improved by a factor of 0. Further, the variation in the amount of lubricant adhered was stabilized within 2% as compared with the conventional value of about 5%.

[Brief description of the drawings]

FIG. 1 shows an example of an embodiment of the present invention, and is a schematic configuration diagram of a wire lubricant coating device.

FIG. 2 shows an example of another embodiment of the present invention and is a schematic view showing an arrangement of a wiping roller and a lubricant applying roller.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wiping unit 2 Application unit 11 Stand 15 Moving stand 19 Stand 21 Moving bearing block 22 Fixed bearing block 28 Motor with reduction gear 31 Wiping roller pair 32 Wiping roller 38 Wiping felt 41 Roller feed drive device 42 Reversible motor 44 Gear Box 51 Lubricant application roller pair 52 Lubricant application roller 53 Lubricant application felt 55 Lubricant supply device 61 Wiping roller pair 64 Lubricant application roller pair W Welding wire

Claims (2)

[Claims] 1. A pair of wiping rollers having a wiping member attached to an outer peripheral surface thereof, the wiping roller pair being arranged to hold a traveling wire, and a downstream side of the wiping roller pair in the wire traveling direction. A pair of coating rollers having a lubricant coating member mounted on the outer peripheral surface thereof are arranged so as to sandwich the traveling wire, and a pair of wiping roller and coating roller are respectively fed in the roller axial direction. A lubricant applying device for welding wire, comprising: a roller feed drive device. 2. The welding wire lubricant applying device according to claim 1, further comprising a rotation drive device that rotationally drives each of the wiping roller pair and the applying roller in a direction opposite to the wire traveling direction.