JPH0646634Y2 - Electrode roller shaping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an electrode roller shaping device for shaping the outer circumference of a pair of electrode rollers of a roll spot welding machine.

(Prior Art) Various types of electrode roller shaping devices have been devised. For example, there is an electrode roller shaping device disclosed in Japanese Utility Model Publication No. 60-25341. This electrode roller shaping device
When the electrode roller shaping device is installed at a predetermined position on the seam welding machine body and a pair of electrode rollers provided on the seam welding machine body sandwich the work to be welded and perform seam welding, electrodes are formed on the outer circumference of the pair of electrode rollers. The roller shaping device presses the cutting blades to press the rotation of the pair of electrode rollers to shape the outer circumference of the electrode rollers.

(Problems to be Solved by the Invention) However, in a portable roll spot (or seam) welder which is attached to a robot arm and rolls spot (or seam) welds an object to be welded by guiding the robot arm, Since the main body of the welding machine is made light and small so that it can be moved sequentially by the robot arm, there is a problem that it is difficult to attach the conventional electrode roller shaping device to the main body of the roll spot welding machine.

Therefore, conventionally, there has been a demand for a device for shaping the electrode roller of a portable roll spot welding machine using such a robot arm.

The present invention has been made to solve the above-mentioned conventional problems, and an electrode roller of a flexible roll spot welding machine attached to a robot arm and moved to a desired position by the robot arm is extremely effective. An object of the present invention is to provide an electrode roller shaping device that can be shaped easily, has a simple structure, and is inexpensive to manufacture.

(Means for Solving the Problem) In order to achieve the above-mentioned object, the present invention provides a first substrate oscillatably provided on a vertical rail laid on a base, and laid on the first substrate. A second board swingably provided on the horizontal rail, and a rotation driving means provided on the second board;
It comprises a large-diameter gear meshed with the drive shaft of the rotary drive means and a cutting blade for shaping the electrode roller, which is provided at the tip of the rotary shaft of the small-diameter gear. When cutting the electrode roller, it is characterized in that the electrode roller is provided with an interval sandwiched by a pair of electrode rollers.

(Operation) As described above, according to the present invention, a cutting blade is provided at each of the tips of the rotary shafts of the large-diameter and small-diameter gears meshed with the drive shaft of the swingable rotary drive means, and these two cuttings are provided. Since the blade interval is set so as to be sandwiched between the pair of electrode rollers when the electrode roller is cut, the cutting blade can be held swingably and the cutting blade can be reliably sandwiched between the electrode rollers. It will be possible.

Therefore, when the pair of electrode rollers of the roll spot welding machine sandwiches the cutting blade, the positioning changes due to the positioning accuracy of the robot or the bending of the bracket of the electrode roller, etc., and some deviation occurs in the vertical and horizontal directions. However, it is possible to reliably absorb this deviation.

Further, since the cutting blades are provided at the tips of the rotary shafts of the small-diameter gear and the large-diameter gear meshed with the drive shaft of the rotary drive means, respectively, the cutting blade of the small-diameter gear side and the large-diameter gear side are cut. The peripheral speed ratio of the blade is different from that of the blade. That is, the rotation of the large-diameter gear-side cutting blade has a low peripheral speed, and the rotation of the small-diameter gear-side cutting blade has a high peripheral speed. Therefore, when the pair of electrode rollers pinch the cutting blade by pressure, if the pair of electrode rollers rotates following the cutting blade of the low peripheral speed,
It becomes possible for the high peripheral speed cutting blade to shape the tips of the pair of electrode rollers, and conversely, if the pair of electrode rollers rotates following the high peripheral speed cutting blade, the low peripheral speed cutting is performed. The blade can shape the tips of the pair of electrode rollers.

That is, the pair of electrode rollers can be reliably shaped by the speed difference between the driven rotation speed of the pair of electrode rollers and the rotation speed of the two cutting blades having different peripheral speeds.

(Embodiment) Next, an embodiment of the present invention will be described with reference to FIGS. 1 is an electrode roller shaping device of the present invention. Reference numeral 2 is a base of the electrode roller shaping device 1, and 3 is a substrate fixed to the base 2. Reference numeral 4 denotes a swinging mechanism that swings in a vertical direction (a direction perpendicular to the paper surface in FIG. 1, that is, a front-back direction of the electrode roller shaping device 1), and 5 denotes a horizontal direction (horizontal direction in the paper surface in FIG. 1). This is a rocking mechanism that rocks. The vertical swing mechanism 4 and the horizontal swing mechanism 5 are the same mechanism,
Only the direction of rocking is different.

Reference numeral 6 denotes a pair of guide rails fixed to the substrate 3 in the vertical direction. Reference numerals 7 and 8 denote bearings slidably fitted to the pair of guide rails 6, and a first substrate (hereinafter referred to as a substrate) 9 is fixed to the bearings 7 and 8. Numeral 10 is a fixed spring clamp fixed between the pair of guide rails 6 and substantially in the center of the substrate 9. Reference numeral 11 denotes a spring holder which is arranged on both sides in the vertical direction of the electrode roller shaping device 1 with the fixed spring retainer 10 as a center and fixed to the substrate 3.

A spring (not shown) is interposed between the fixed spring retainer 10 and the spring holder 11, and always urges elastically toward the center. The mounting means for the spring (not shown) is the same as the lateral swing mechanism 5 described later (see FIGS. 4 and 5). Reference numeral 12 is an adjusting bolt screwed into the spring holder 11 to adjust the elastic force of a spring (not shown), and 13 is a lock nut screwed into the adjusting bolt 12 (see FIG. 5).

Therefore, the substrate 9 is supported by the substrate 3 so as to be vertically swingable. The vertical swing range of the substrate 9 is determined by the distance between the fixed spring retainer 10 and the tip of the spring holder 11 (the same as the tip 19b of the spring holder 19 shown in FIG. 5 described later).

Reference numeral 14 is a pair of guide rails fixed laterally to the substrate 9 (direction orthogonal to the pair of guide rails 6), and 15 and 16 are bearings slidably fitted to the pair of guide rails 14. A second substrate (hereinafter referred to as a substrate) 17 is fixedly attached to 16. Reference numeral 18 is a fixed spring clamp fixed between the pair of guide rails 14 and substantially in the center of the substrate 17, and 19 is arranged on both sides of the electrode roller shaping device 1 in the lateral direction with the fixed spring clamp 18 as the center. The spring holder is fixed to the substrate 9.

A spring hole 20 is formed on the opposite side of the spring holder 19, and a screw hole 21 communicating with the spring hole 20 is provided on the bottom portion 19a (side wall opposite to the fixed spring retainer 18). 22 is a spring hole of the spring holder 19
It is a movable spring clamp slidably disposed on the. twenty three
Is a spring interposed between the fixed spring retainer 18 and the movable spring retainer 22 so as to always elastically urge it.

Reference numeral 24 is an adjuster bolt screwed into the screw hole 21 of the spring holder 19, and the adjuster bolt 24 is engaged with the movable spring retainer 22 to adjust the elastic force of the spring 23. Reference numeral 25 is a lock nut screwed into the adjustment bolt 24.

Therefore, the substrate 17 is supported by the substrate 9 slidably in the lateral direction. The lateral movement range of this board 17 is defined by the fixed spring retainer 18 and the tip of the spring holder 19.
It depends on the distance from 19b (see Fig. 5).

Reference numeral 26 is a bracket fixed to the board 17, and 27 is a bearing case fixed to the top of the bracket 26. Reference numeral 28 denotes a drive shaft rotatably supported by a bearing 29 installed in the bearing case 27, and gears 30 and 31 are attached to a rear protrusion of the drive shaft 28. 32 is a color provided between the gears 30 and 31.

33 and 34 are bearings 35 installed in the bearing case 27,
A rotary shaft rotatably supported by 36, a large-diameter gear 37 meshing with the gear 30 is mounted on the rear projection of the rotary shaft 33, and a gear is mounted on the rear projection of the rotary shaft 34. A gear 38 of small diameter that meshes with 30 is mounted. Therefore, the drive shaft
When 28 rotates, the rotating shafts 33 and 34 simultaneously rotate in the same direction, and the rotating shaft 34 rotates faster than the rotating shaft 33 due to the gear ratio of the large diameter gear 37 and the small diameter gear 38 (see FIG. 6). .

39 and 40 are a pair of cutting blades for shaping the electrode rollers, which have the same size and are attached to the tips of the rotary shafts 33 and 34 with nuts 41 and 42, and which have substantially the same shape. 3
Reference numerals 9 and 40 shape the outer periphery of the electrode roller, which will be described later, that is, the side surface of the tip end portion of the electrode roller and the electrode top (see FIG. 7).

43 and 44 are collars interposed between the flange 33a of the rotary shaft 33 and the flange 34a of the rotary shaft 34 and the bearing case 27, 4
5 is a motor bracket fixed to the rear of bracket 26, 4
A drive motor 6 is mounted on the motor bracket 45 and serves as a rotation drive means. A drive shaft 46a of the drive motor 46 is provided with a gear 47 that meshes with the gear 31. Reference numeral 48 is a roll spot welder attached to the robot arm, and 49 is a pair of electrode rollers rotatably supported by the roll spot welder 48.

Next, the operation will be described. When the drive motor 46 is operated, the drive shaft 46a of the drive motor 46 rotates, the rotation is transmitted from the gear 47 to the gear 31, and the drive shaft 28 rotates. The rotation of the drive shaft 28 causes the gear 30 to rotate. Two gears having different gear ratios, that is, a large-diameter gear 37 and a small-diameter gear 38 are meshed with the gear 30, so that the large-diameter gear 37 rotates at a low speed and the small-diameter gear 38 rotates at a high speed.

Rotating shaft 33 and rotating shaft 33 due to the low speed rotation of large diameter gear
The cutting edge 39 for shaping the electrode roller attached to the tip of the blade also rotates at a low speed, and the peripheral speed of the cutting edge 39 becomes slow. Further, due to the high speed rotation of the gear 38 having a small diameter, the rotating shaft 34 and the electrode roller shaping cutting blade 40 mounted on the tip of the rotating shaft 34 also rotate at high speed, and the peripheral speed of the cutting blade 40 increases. That is, the drive motor
When the 46 is activated, a pair of cutting blades 39 for shaping the electrode roller,
While 40 rotates in the same direction, one electrode roller shaping cutting blade 39 rotates at a low speed and its peripheral speed becomes slow, and the other electrode roller shaping cutting blade 40 rotates at a high speed and its peripheral speed. Will be faster.

In this way, a pair of cutting blades 39, 40 for shaping the electrode rollers
When the tool rotates, the roll spot welder 48 attached to the robot arm (not shown) moves to the vicinity of the electrode roller shaping device 1, and a pair of cutting blades for shaping the electrode rollers.
39 and 40 are sandwiched by a pair of electrode rollers 49.

A pair of electrode rollers 49 is a cutting blade for shaping a pair of electrode rollers.
When sandwiching 39, 40, if the position of the pair of electrode rollers 49 is displaced in the vertical direction, when the pair of electrode rollers 49 abut the pair of electrode roller shaping cutting blades 39, 40, A force acts, and the vertical swing mechanism 4 causes the pair of cutting blades 39, 40 for shaping the electrode rollers to move integrally in the vertical direction, and the pair of electrode rollers 49 forms a pair of cutting blades for shaping the electrode rollers. 3
Make correct and even contact with 9, 40.

Similarly, when the positions of the pair of electrode rollers 49 are displaced in the lateral direction, when the pair of electrode rollers 49 come into contact with the pair of electrode roller shaping cutting blades 39, 40, a lateral force acts and the lateral force acts. A pair of cutting blades 3 for shaping the electrode rollers by the direction swing mechanism 5
9 and 40 integrally move laterally, and the pair of electrode rollers 49 correctly and evenly contact the pair of electrode roller shaping cutting blades 39 and 40.

In this way, when the pair of electrode rollers 49 contact the pair of electrode roller shaping cutting blades 39, 40, the pressure of the roll spot welder 48 causes the pair of electrode rollers 49 to have a predetermined pressure. Since the cutting blades 39 and 40 for shaping the rollers are to be sandwiched, the pair of electrode rollers 49 has a pair of cutting blades 3.
It rotates following 9 and 40.

At this time, if the pair of electrode rollers 49 is rotated by following the low peripheral speed cutting blade 39 rotating at a low speed, the high peripheral speed cutting blade 40 rotating at a high speed becomes If the tip portion is shaped and, conversely, the pair of electrode rollers 49 rotates in response to the high peripheral speed cutting blade 40 rotating at high speed, the pair of low peripheral speed cutting blades 39 rotating at low speed becomes a pair. The tip portion of the electrode roller 49 is shaped. That is, the pair of electrode rollers 49 is shaped by the speed difference between the driven rotation speed of the pair of electrode rollers 49 and the rotation speed of the pair of cutting blades 39 and 40 having different peripheral speeds.

Further, the pressure of the roll spot welding machine 48 causes the pair of electrode rollers 49 to move in the direction of approaching each other, so that the tip end side surfaces of the pair of electrode rollers 49 are first shaped, and burrs and the like attached to the tip end side surfaces are cut. To be removed. Then, the next electrode top is shaped. After shaping the pair of electrode rollers 49, the roll spot welding machine 48
49 is opened, and the nipping of the pair of cutting blades 39, 40 for shaping the electrode rollers is released.

After the pinch is released, the drive motor 46 is deactivated and the pair of electrode roller shaping cutting blades 39, 40 is deactivated. Then, the roll spot welding machine 48 returns to its original position by the robot arm and prepares for the next roll spot welding.

(Effect of the Invention) Since the present invention is configured as described above, the cutting blade can be swingably held, and the cutting blade can be accurately sandwiched by the pair of electrode rollers. Therefore, when the pair of electrode rollers of the roll spot welding machine sandwiches the cutting blade of the electrode roller shaping device, the positioning changes due to the positioning accuracy of the robot and the bending of the bracket of the electrode roller, and the vertical and horizontal directions are changed. Even if some deviation occurs, this deviation can be reliably absorbed by swinging the cutting blade. As a result, the electrode roller can be properly brought into contact with the cutting blade, and the electrode roller can be satisfactorily cut. Therefore, the shaping quality of the electrode roller can be improved and also the welding quality can be improved.

Further, since the cutting blades attached to the tips of the rotary shafts of the large diameter gear and the small diameter gear are sandwiched by the pair of electrode rollers, the pair of electrode rollers can be shaped simultaneously.

Further, since the cutting blades are provided at the tips of the rotating shafts of the small-diameter gear and the large-diameter gear that mesh with the gear provided on the drive shaft of the rotary drive means, the cutting blade on the small-diameter gear side and the large-diameter gear The peripheral speed ratios of the cutting blades on the side are different from each other, and the pair of electrode rollers has a peripheral speed different from the driven rotational speed of the electrode rollers.
With the speed difference between the cutting speed and the rotation speed of the cutting blade, the shaping can be reliably performed.

Moreover, since the structure is simple, the manufacturing cost is low and the maintenance is easy.

Further, by this, the shaping of the pair of electrode rollers of the roll spot welding machine can be automated.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 2 is a first view.
The right side view of the thing of a figure, FIG. 3 is the top view of the thing of FIG. 1,
4 is an enlarged arrow view taken along line IV-IV in FIG. 2, FIG. 5 is a sectional view taken along line VV in FIG. 4, and FIG. 6 is VI- in FIG.
FIG. 7 is an enlarged sectional view taken along line VI, and FIG. 7 is an enlarged sectional view taken along line VII-VII in FIG. 1 ... Electrode roller shaping device 39 ... Cutting blade 40 ... Cutting blade 46 ... Drive motor (rotational drive means) 49 ... A pair of electrode rollers

Claims (1)

[Scope of utility model registration request] 1. A first substrate swingably provided on a vertical rail laid on a base, and a second substrate swingably provided on a horizontal rail laid on the first substrate. And a rotary drive means provided on the second substrate, and a cutting for shaping an electrode roller provided at the tip of the rotary shaft of the large diameter gear and the small diameter gear meshed with the drive shaft of the rotation driving means. It consists of a blade and the 2
An electrode roller shaping device, characterized in that an interval between two cutting blades is set to an interval sandwiched by a pair of electrode rollers when the electrode roller is cut.