JPH0377786A - Automatic seam welding method for fuel tank or the like - Google Patents

Abstract

PURPOSE:To perform automatic welding only by changing a record of a given numerical command by giving a numerical command signal to each of a mechanical constitution part and first, second and third numerically controlled motors on automatic profiling. CONSTITUTION:The rotating speed of a rotary disk 13 and a sliding guide member 15 based on the numerical command signal of the first numerically controlled motor 2, the moving speed of a slide base 25 by reversible rotation of a feed screw 17 on the sliding guide member 15 based on the numerical command signal of the second numerically controlled motor 19 and the rotating speed of a work supporting base 34 and materials 42 to be welded on the supporting base based on the numerical command signal of the third numerically controlled motor 39 are harmonized with one another. Accordingly, an annular weld line having >= two corners of the materials 42 to be welded is moved between a couple of seam welding electrode plates 52 and automatic profile welding can be performed. Further, at the time of welding setup, it can be carried out only by changing the record of the given numerical command.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a 3-pongee automatic tracing/seam welding method for fuel tanks. By simply recording each annular welding line according to its standard and replacing multiple numerical commands, the drive mode of each of the three numerically controlled motors (first to third) can be converted, which was previously necessary. There is no need for a copying plate, multiple copying bins installed on the copying plate to detect the corners of the weld line, and other mechanical copying tools that vary depending on the specifications of the workpiece, and the workpiece can be welded by sandwiching the workpiece. Seam 7IL The welding speed is not controlled by the circumferential speed of the electrode plate pair, but rather the welding electrode plate pair follows the welding movement of the workpiece! The present invention relates to a method for welding fuel tanks, etc., which also enables the welding of fuel tanks and the like.

(Prior art) Conventionally, two parts such as a fuel tank are manufactured by welding, so the workpiece is 2r! An annular weld line with J or more corners can be welded once using a seam welder. However, in the past, as shown in Figure PtrJ9, welding fi
Ironman b with two or more joints installed on the side a, and the terminal of Ironman b: A copying plate installed horizontally rotatably on the side a) A workpiece support stand e installed on c, and copying of the lower surface of the copying plate c. A detection switch, etc. that detects the bin f and the moving profiling pin f is required, and especially when the standards of the workpiece 42 to be attached to the workpiece support base e are different, the profiling that conforms to the standard is required each time the welding setup is changed. Since it has to be replaced with plate C etc., it is necessary to prepare many types of jigs such as copying plate C, which has the disadvantage that setup change is not easy.

(Problems to be Solved by the Invention/Object of the Invention) The present invention provides numerical values to be assigned to each of three numerically controlled motors when changing the setup for welding workpieces of different standards using a seam welding machine. We are not only trying to solve problems that can be easily done by simply exchanging command records, but we are also trying to make it possible to almost eliminate the use of jigs such as copying plates and copying pins that were required in the past. This is the subject of the present invention.

(Means for Solving the Problems) The present invention has been made to meet the above-mentioned objectives, and specifically, it is driven by a numerical command signal selectively applied to the installation plate 1 attached to the seam weld fill. A rotary plate 1 that is reversibly rotated in two horizontal directions by a first numerically controlled motor 2.
3 and is mounted on its rotary disk 13 and driven by a numerical command signal that is selected and given! A horizontally rotating sliding guide member 15 is provided with a feed screw 17 that is reversibly rotated by one second numerical control motor 11J, and a nut 28 is screwed onto the directly arranged feed screw 17. It consists of a sliding slide 25 and a workpiece support 34 that is attached to the slide 25 and is reversibly rotatable by a third numerically controlled motor 39 that is driven by a numerical command signal that is selectively applied. Rotational speed and sliding based on numerical command signal of numerically controlled motor 2! #I The rotational speed of the guide member 15, the reversible rotational speed of the feed screw 17 on the sliding guide member 15 according to the numerical command signal of the second numerically controlled motor 19, the advancing and retreating speed of the slide table 25, and the three numerical values of the third numerically controlled motor The rotational speeds of the workpiece support table 34 and the workpiece 42 on the support table 34 are harmonized according to the command signal, and three of the workpieces 51 are
To provide a seam welding method for fuel tanks, characterized in that an annular welding line 43 having a corner C larger than a spear point is moved between a pair of seam welding electrode plates 52 to perform automatic copy welding. .

(Function of the present invention) The present invention utilizes the first numerical control motor 2, the second numerical control motor 19, and the third Wl value control motor 39 to fuel the fuel without using the conventional mechanical means such as the iron man or copying plate. This system automatically performs seam welding of an object 42 to be welded such as a tank, and the welding is carried out by <linear motion> as shown in FIG. It is essential to perform the rotational movement shown in FIG. 7 without relying on the copying plate.

In the present invention, the mechanical component is a part driven by the first, second, and third numerically controlled motors 2, 19, and 39, and is constituted by three tsumugi, the first, second, and third.

Regarding the automatic copying of the present invention method, 1 mechanical components such as rotation g113, feed screw 17, slide table 25, workpiece support table 35, etc.) and 1.2.3 Numerical control motor 2.19
．． The (numeric command signals) given to each of the three will be explained.

(Mechanical components) 1st detail Rotation center of rotation g113 (first numerically controlled motor 2) 2nd detail Center of slide table 25 that moves by reversible rotation of feed bar 17, (concentric with workpiece support 35) (2nd The welding line 43 of the workpiece 42 attached to the work support stand 35 is shown in Fig. 5 and #fJ7. As shown, 2r
b has a corner 43a, the center of the welding line 43 (in many cases, the center of the object to be welded 39); the center of each corner 43a; the straight #ili connecting the above-mentioned centers; and the electrode plate pair. It has an intersection ■ with the straight line ii connecting the 42 contact points.

(Numerical command signal) For example, in <straight line welding> from passing the left corner 43a to welding the right corner 43a in FIG. Numerical signals related to each other are given to the first numerically controlled motor 2 and the second numerically controlled motor 19, and the m#: wire 43 passed between the electric bridge plate pair 52 and the Weld # passed between the electrode plate pair 42 from the center ■! 43
Welding is performed by controlling expansion and contraction so that up to (up to the intersection ■) a straight line is formed. The mode is from point (1) to point (II) in Figure 6.
Same as the previous <linear motion>, the rotation of the second fine slide base 25 by the feed Qhji17 (second
This is done by controlling the rotation of the numerically controlled motor 19). However, when moving points (1) to (II) in Fig. 6 at a constant speed in a straight line, the third numerically controlled motor 39
As described above, a non-driving numerical control signal is applied to the f52 numerical control motor 2 to control the sliding guide member 15 (feed screw 17) by the first numerical control motor 2 under uniform horizontal rotation of the sliding guide member 15 (feed screw 17). Therefore, the feed screw 17 must be rotated reversibly.

For example, when welding the upper right corner 43a of No. 711, a "stop J" signal is given to the third numerically controlled motor 39 to restrain the workpiece support base 35 from rotating relative to the slide base 25, and the second numerically controlled motor Welding is performed by giving an 11-value rotation signal to the first numerically controlled motor 2 (without giving a "stop" signal to any one of them). the! Mr. S has 1 sleeve q
Rotation of the rotary disk 13 (rotation of the first numerically controlled motor 2)
The rotation of the second fine feed bar 17 (rotation of the second numerically controlled motor 19) is controlled in synchronization with . The rotation radius r at this time is determined by the distance At (unchanged distance) between the rotation center of the first fine rotary disk 13 and the electrode plate N42,
Regarding the speed, as shown in Fig. 8, the rotation radius r and the center of the workpiece support stand 34 with 3 tsumugi 0 (welding line -7 - center ■)
control by the ratio of the distances.

The above describes the original ff+7 regarding the number #1 command signal of the present invention, and since the welding line 43 of the workpiece 42 is not uniform but has various curves, the numerical control signal is recorded by teaching.

(Implementation N) Figures 1 to 4 show the punching machine used in the present invention, Figure 1 is a partially cutaway side view, Figure @2 is a plan view, and Figure 3 is #1 Figure A-
The Afi cut front view and FIG. 4 are side views showing the relationship with the seam welding machine 51. 5.6U7J is an explanatory diagram of the linear motion of the welded object in this welding method, and FIG. 7.8 is an explanatory diagram of the same rotational motion.

1 to 4 illustrate the structure of the substitute part of the present invention, in which 1 is an installation plate and includes a reduction gear 5 with a reversible output shaft 7 projecting upward;
Install the first WL value motor 2, and output shaft 3 of the motor 2.
Sprocket wheel 4 fixed to and input shaft 6 of Makureniso 5
A fixed shaft 11 is set upright on the installation board 1 next to the reducer IfIi 7, and a bearing 1 is attached to the outer periphery of the shaft.
A large gear 14 that meshes with the pinion 10 fixed to the reversible output shaft 7 of the reduction gear 8115 is mounted on the rotary disk 13, and a frame-shaped slide is mounted on the rotary g113. A second numerical control device is equipped with a movable guide member 15, a shaft support member 16 of this guide member 15 provides a feed line 17 parallel to the longitudinal direction of the member 15, and is fixed to the lower surface of the guide member 15 by hanging. A chain wheel (or timing belt) 22 is connected to the sprocket wheel 21 of the output shaft 20 of the motor 19 and the sprocket wheel 18 of the feed height 17.

Print! ! 1. Lay the I-shaped cross-section rail 23 and plate-shaped rail 24 shown in FIG. A slide base 25 is mounted on the lower surface of which a movable plate 26 and a small wheel 27 that rides on a plate-shaped rail 24 are mounted, and a nut 23 is provided on the lower surface of the slide base 25 to be screwed into the feed screw 17. A cylindrical piece 31 with a shelf 32 on the top surface
A work support stand 34 is rotatably mounted on a bearing 33 on the outer periphery of the upper end of the cylindrical piece 31, and the center of a block 35 fixedly attached to the lower surface of the center of the support stand 34 is rotated so that it cannot rotate. The shaft 36 is rotatably protruded from the lower surface of the shelf 32 to fix the ratchet wheel 37, and the sprocket wheel of the third numerically controlled motor 39 is attached in a hanging manner to the arm 38 which protrudes in either direction of the cylindrical piece 31. A chino (or timing belt) 41 passing through the window hole 31a of the cylindrical piece 31 is passed between the two and the workpiece support 34 is rotated by the three motors.

This invention is! As shown in Figure #4, install the hem plate 1 on the machine base of the seam welding machine 51 (if it is not possible to install it on the machine base, install it as appropriate), The object to be welded 42 is attached, and the weld line 43 having three or more corners 43a of the mating greens X-3 and Y- of the object to be welded 42 is inserted between the pair of electrode plates 52 of the seam welder 51.

Welding speed is 1st, 2nd, rjS3 numerical control motor 2
．． It is determined based on one or three correlated speeds, and is not determined based on the circumferential speed of the electrode plate pair 52 as in the conventional case.One point is unique to the present invention. That is, the electrode plate pair 52 may be rotated by one rotation.

(Effects of the present invention) The present invention provides the following features: on the installation plate 1 attached to the seam welding machine 51;
tt driven by a selectively given numerical command signal
A rotary disk 13 that is reversibly rotated in two horizontal directions by a Si numerically controlled motor 2, and a tJS2 that is mounted on the rotary disk 13 and driven by numerical command signals that are selectively applied.
An m-movement guide member 15 equipped with a feed screw 17 that is reversibly rotated by one value-controlled numerical control motor, and a slide that slides on the feed screw 15 by screwing a nut 28 onto the feed screw 17. The components include a stand 25 and a workpiece support stand 34 installed on the slide stand and reversibly rotated by three third numerically controlled motors driven by numerical command signals selectively applied. , the center of the rotary disk 13 which is the first pongee, the center of the slide table 25 which is the second axis, PJ3
In addition to the work support stand 34, which is a pongee, most of the conventionally used iron man, copying plate, copying bottle, and other jigs are installed, and the first, second, and @3 loss value opening motors 2.19. 3
9, the numerical value f3, which is numerically controlled according to the standards of the workpiece, is recorded in an external record using a teaching means, etc., and the external record is selected and played back each time the workpiece is changed. Since it is only necessary to set the first and second
Automatic seam welding can be performed by driving all or any of the third numerically controlled motors to feed the electrode plate pair 52 of the workpiece 42 without moving the electrode plate pair 52 at the circumferential speed of the electrode plate N52 as in the conventional method. This has the effect that the electrode plate pair 52 can be rotated according to the welding speed of the three motors of the object to be welded.

[Brief explanation of drawings]

Figures 1 to 4 show the mechanical parts used in the present invention, Figure 1 is a partially cutaway side view, Figure 2 is a plan view, and Figure 3 is Figure 1A.
-A! The cutaway front view and FIG. 4 are side views showing the relationship between the seam 18 and the seam 51. Fig. 5.6 is an explanatory diagram of the linear motion of the welded object in this welding method, and Fig. 7.8 is an explanatory diagram of the same rotational motion. FIG. 9 is a plan view of a mechanical part in a conventional welding method. 1 → Installation plate 2 → First numerical control motor 13 → Rotating plate
15→Sliding guide member 17→Feed screw 19→vJ2 losing value control motor 22→
Chain (or timing belt) 25 → slide stand 2
8 → Nut 31 → Cylindrical piece 32 → Shelf 33 → Bearing 34 → Work support stand 36 → Rotating pongee 38 → Arm 39 → r: trJ3 numerical control motor 4
1 → Chain (or timing belt) 42 → Welded object
43 → Welding line 43a → Corner 51 → Seam welding 52 → Electrode plate pair

Claims (1)

[Scope of Claims] A rotary plate that is reversibly rotated in two horizontal directions by a first numerical control motor driven by a numerical command signal selectively applied to a mounting plate attached to a seam welding machine, and its rotation. a sliding guide member that rotates in a horizontal direction and includes a feed screw that is mounted on a panel and that is reversibly rotated by a second numerically controlled motor that is driven by a numerical command signal that is selected and given; a nut that is attached to the feed screw; A slide table that is screwed together and slides on a sliding guide member, and a workpiece that is attached to the slide table and can be rotated reversibly by a third numerically controlled motor that is driven by numerical command signals that are selectively applied. The rotation speed of the sliding guide member is based on the numerical command signal of the first numerically controlled motor, and the reversible rotation of the feed screw on the sliding guide member is based on the numerical command signal of the second numerically controlled motor. A circular weld line having two or more corners of the workpiece is created by harmonizing the rotational speed of the workpiece support base and the workpiece on the support base based on the advance and retreat speed of the slide base and the numerical command signal of the third numerically controlled motor. An automatic seam welding method for fuel tanks, characterized in that automatic copy welding is performed by moving between a pair of seam welding electrode plates.