JPH01284442A - Method of bending and joining bar - Google Patents

Abstract

PURPOSE:To easily form a fitting recess for joining the other bar by bending a bar which is provided with a hollow notch to the side face thereof and is provided with a V-shaped notch orthogonal with the notch to the bottom thereof to a suitable angle to form the fitting recess and matching and fixing the end of the other bar thereto. CONSTITUTION:A square pipe 10 is bored with the U-shaped hollow notch 12 and is then bored with the V-shaped notch 14 orthogonal with the notch 12. The pipe 10 is square in section of the length A on one side and the U-shaped notch 12 is formed with the aperture end of about twofold the length A of one side of the square pipe 10 and is bored to the notching depth of about 1/2 the length A. The V-shaped notch 14 is formed to a rectangular equilateral triangle and the square pipe 10 is bent at the vertical angle of the notch 14 to bring the opposite two sides 15 into contact with each other, then the sides are fixed by welding, etc. The end part of the other square pipe 20 is inserted into the fitting recess 18 having the rectangular sectional shape of this angle part and the fitting part is fixed. The horizontal and vertical positioning is executed by the erecting walls of the V-shaped notch and the hollow notch, by which the positioning in three-dimensional direction is executed.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for bending and joining bars, and more specifically, for example, bending and joining bars such as square or round pieces or square or round pipes by bending them at appropriate angles. This invention relates to a method for bending and joining a bar, and joining another bar to the corner of the bar.

[Prior Art] Generally, when a solid or hollow bar is used to form the corner part of a machine frame of a machine or equipment, when the bar is hollow, a V-shape is formed on the bar. A method is known in which a notch is provided, the bar is bent at the notch and fixed by a fixing means such as welding or adhesive, and then the end of another bar is abutted and joined to the corner. In addition, when the bar is a solid material, the end of the bar on the side that forms one side of the corner portion is brought into contact with an appropriate angle and joined by a fixing means such as welding or adhesive. A method is used in which the end of another bar is brought into contact with the corner. Furthermore, bonding methods that combine these methods are also known.

[Problems to be Solved by the Invention] However, since all of these conventional bending and joining methods involve contact joining, there are problems such as not only is it not easy to determine the position of the joining, but also skill is required for the joining work. Ta. Furthermore, when the bar is a hollow material, there are problems such as insufficient strength.

This invention was made in view of the above circumstances, and its purpose is to cut out a bar material and then bend it to form a fitting recess for joining. It is an object of the present invention to provide a method for bending and joining bars that can be easily and firmly joined using the above method.

[Means for Solving the Problems] In order to achieve the above object, the bending and joining method of the present invention provides a recessed notch on an arbitrary side surface of one of the bars to be joined, and After providing a V-shaped cutout in a direction perpendicular to this concave cutout at the bottom of the bar, the bar is bent at an appropriate angle at the V-shaped cutout to form a fitting recess at the corner. However, the end of the other bar to be joined is fitted and fixed in the fitting recess.

In this invention, the concave notch may have any shape as long as it forms a fitting recess when the bar is bent, but the bottom of the concave notch is located at the end of another bar. It is preferable that the side wall surface of the concave notch is flat because it forms a contact surface.Also, since the side wall surface of the concave notch affects the vertical angle when another bar is fitted and fixed, it is important to consider its positioning. It is preferable to use an angle or shape that can be used.

Further, the V-shaped notch may be at any angle as long as it is used for bending the bar, and the bending angle may be set to a right angle or an arbitrary obtuse angle depending on the widening angle of the V-shaped notch. , can be made into an acute angle.

In addition, the bar may be solid or hollow, and its cross section may be of any shape, such as square or circular.

[Function] As described above, by providing a concave notch on an arbitrary side surface of one of the bars to be joined, a fitting recess is formed when the bar is bent. Furthermore, by providing a V-shaped notch at the bottom of the concave notch in a direction perpendicular to the concave notch, the bar can be bent at an appropriate angle to form a fitting concave at the corner. The end of the other bar to be joined to this fitting recess is fitted and fixed.

[Examples] Examples of the present invention will be described in detail below with reference to the drawings.

Fig. 1 is a perspective view of an example of a state joined by the bending and joining method of the present invention, and Fig. 2 is an exploded perspective view thereof. However, it does not necessarily have to be this kind of metal,
It may also be made of plastic or the like.

As shown in FIG. 3, one of the square vibrators 10 to be joined is first provided with a mouth-shaped recessed notch 12 (hereinafter referred to as a mouth-shaped notch) on an appropriate side surface. As shown in FIG. 4, a V-shaped notch 14 is bored in a direction perpendicular to the mouth-shaped notch 12 (see FIGS. 5(a) and 5(b)). In this case, the square vibrator 10 is formed with a square cross section having a side length A, and the mouth-shaped notch 12 is formed in the square vibrator 1.
The opening width is approximately twice the length A of one side of the square vibrator 10, and the cutting depth is approximately half the length A of one side of the square vibrator 10. On the other hand, the ■-shaped notch 14 is connected to the square vibrator 1.
It is formed in the shape of a right-angled isosceles triangle that opens toward the side of the square vibrator 10, and its apex is provided across one side wall of the square vibrator 10, and is used for positioning in the bending process described later. There is. Next, after drilling the V-shaped notch 14, the square pipe 10 is bent at the apex angle of the V-shaped notch 14, and the two opposing sides 15 and 16 of the V-shaped notch 14 are bent. When they are abutted and fixed by a fixing means such as welding, a fitting recess 18 having a square cross section is formed at the corner (see FIGS. 2 and 6). Then, the end of the other square vibrator 20 is fitted into the fitting recess 18, and the joint is fixed by a fixing means such as welding to complete the joining operation. In this case, the upright wall 13.13 of the mouth-shaped notch 12 can be used as a positioning surface for the square via 20 to be joined.

When bending and joining the rectangular vibrator 10 in the above steps, a concave notch processing device described below is used to form the mouth-shaped notch 12. In this case, the recessed notch machining device has a die block 31 installed in the device main body 30, as shown in FIGS. 7, 9, and 10.
An upper material presser 33 and a cutter 34 for cutting the U-shaped recess, which are located above the die block 31 and are movable up and down by applying the elastic force of the first spring 32, are connected to the die block 31. The second one toward the side of the square vibrator 10 in the processing section.
A side material presser 36 is disposed to be movable forward and backward by applying the elastic force of a spring 35, and a third spring 37 is provided at the rear upper part of the main body 30 to move the side material presser 36 forward and backward. Driving body 3 arranged to be able to move up and down by applying force
8, a lowering means 41 for lowering a cutter mounting plate 39 fixed to the upper end of the U-shaped recess cutting cutter 34 and a driver mounting plate 40 fixed to the upper part of the driver 38 with a time lag. The square pipe set core bar 42 is moved onto the die block 31 from a direction perpendicular to the cutter 34, the upper material presser 33, and the side material presser 36. Note that the processing section of the die block 31 is provided with an H-shaped discharge section 43 for discharging cut material pieces. In addition, the square pipe set core bar 42 has a square pipe guiding taper 42a formed at its tip, a mouth-shaped recess 42b at the processed part (see Fig. 8), and is movable. A type positioning block 42c is mounted so that its position can be adjusted.

In order to form the mouth-shaped notch 12 in the square pipe 10 using the concave notch lowering device configured as described above, the core bar 42 for the square pipe set is moved onto the die block 31, and the square pipe set The square pipe 10 is moved from the tip side of the core metal 42, the core metal 42 is inserted into the square vibrator 10, and the square pipe 10 is set.

Next, when the descending means 41 descends, first, the descending means 41
contacts the driver mounting plate 40, the driver 38 descends against the third spring 31, and the drive-side inclined cam portion 38a provided at the lower end of the driver 38 moves behind the side material presser 36. The side material presser 36 is engaged with the driven side inclined cam portion 36a at the end, and is pressed toward the square pipe 10 against the second spring 35, so that the square pipe 10 is fixed. The lowering means 41 that has come into contact with the driver mounting plate 40 then moves to the cutter mounting plate 39.
The upper material presser 33 and cutter 34 are lowered against the first spring 32 to fix the upper part of the square vibrator 10, and the cutter 34 is pushed into the side of the square pipe 10 to form a mouth shape. A notch 12 is bored.

In the square pipe 10 in which the mouth-shaped notch 12 has been bored as described above, a V-shaped notch 14 is next bored. Drilled using notch processing equipment. In this case, as shown in FIGS. 11 to 14, the ■-shaped notch processing device is disposed so as to be movable up and down above the processing portion of the die block 51 installed on the lower mold plate 50. A cutter 52 having a blade portion, a material presser 53 disposed so as to be movable toward the square pipe 10 from the front side of the processing section of the die block 51, and a material presser 53 that moves up and down to press the material presser 53 toward the square pipe 10. A material presser drive body 54, the cutter 52 that biases the elastic force of a spring 55, and a cutter mounting plate 5 fixed to the upper part of the material presser drive body 54.
6 and a lowering means 58 for lowering the material presser driver mounting plate 57 with a time lag.

By the V-shaped notch processing device configured as described above, the V-shaped notch 14 is formed in the mouth-shaped notch 12 of the square pipe 10.
To make a hole, first, the square vibrator 10 with the mouth-shaped cutout 12 is set in the die block 51 in a predetermined state with the mouth-shaped cutout 12 facing upward. Then, when the lowering means 58 is lowered, the lowering means 58 comes into contact with the material presser driver mounting plate 57 and lowers the material presser driver 54, and the material presser 53 is pressed against the front side of the square pipe 10, so that the square vibrator 10 is fixed. Furthermore, since the lowering means 58 continues to come into contact with the cutter mounting plate 56 and lower the cutter 52, the cutter 52 is pushed into the side of the mouth-shaped notch 12 of the fixed square pipe 10, and the square pipe 10 is A V-shaped notch 14 is formed which opens laterally.

In addition, in the above description, the mouth-shaped notch 12 of the square pipe 10
Although a case has been described in which the V-shaped notch 12 and the V-shaped cutout 14 are formed using dedicated processing equipment, it is not necessarily necessary to use the dedicated processing equipment as described above.
The single-character notch portions 14 may be individually processed by a device that continuously processes them. Further, in the above embodiment, the mouth-shaped notch 12 is bored in one of the square pipes 10, and the square pipe 10 is bent at a substantially right angle.
Although a case has been described in which the end of the other square pipe 20 is joined at a right angle to the bent square vibe 10, the bending angle does not necessarily have to be a right angle, and may be set at any angle. A horn vibrator 20 that can be joined together with
The joining mode can also be set arbitrarily. A modification thereof will be explained below.

◎First modification Figures 15(a) and (b) are a plan view and a front view of one square pipe of the first modification, Figure 16 is a plan view of the bent state, and Figure 17(a) ) to (C) show a plan view, a back view, and a side view of the bonded state.

In this case, the concave notch 12 has an upright wall 13a perpendicular to the square vibrator 10 and a side surface of the square pipe 10 about 4
It has a shape with a 5° inclined standing wall 13b,
Further, the V-shaped notch 14 is formed at an angle of approximately 45° with the opening located at the narrow side of the right-angled upright wall 13a and the inclined upright wall 13b, and the bent portion is formed at two locations. The vertical upright walls 1 of the fitting recesses 18 and 18 of both bent portions are formed at 135 degrees, respectively.
Both ends of the other square vibrator 20, which is bent into a mouth shape, are fitted and connected to each of 3a and 13a in a positioned state.

◎KIL BACK Figures 18 (a) and (b) are a plan view and a front view of one corner vibrator of the second modification, Figure 19 is a plan view of its folded state, and Figure 20 (a). ) to (C) show a plan view, a back view, and a side view of the bonded state.

In this case, the concave notch 12 has two inclined upright walls 13b, 13b that are symmetrical about 120 degrees with respect to the square vibrator 10, and the ■-shaped notch 14 has both inclined upright walls. The openings are formed at an angle of approximately 135° at the widening side portions of the openings 13b and 13b, and the apex portion thereof is formed in the shape of a small circular arc. Therefore, the square pipe 10
When it is bent at the V-shaped notch 14, the bending angle of the bent portion is 45°, and the both inclined upstanding walls 13b
, 13b are formed at right angles to each other to form a fitting recess 18 (see FIG. 19).

With one end of the other square vibrator 20 bent in a mouth shape being positioned on both inclined upstanding walls 13b, 13b of the fitting recess 18 of the bent part of the square vibrator 10 bent in this way, They are designed to be fitted together.

Figures 21 (a) and (b) are a plan view and a front view of one square pipe of the third modification, Figure 22 is a plan view of its bent state, and Figure 23 ( a) to (C) show a plan view, a back view, and a side view of the bonded state.

In this case, the concave notch 12 has two inclined upright walls 13b, 13b that are symmetrical about 70 degrees with respect to the square pipe 10, and the V-shaped notch 14 has both inclined upright walls. The openings are formed at an angle of approximately 45° at the narrow sides of the openings 13b and 13b, and the apex portions thereof are formed in the shape of a small circular arc. Therefore, when the square vibrator 10 is bent at the V-shaped notch 14, the bending angle of the bent portion is 135°, and the both inclined upright walls 13b
, 13b are formed at right angles to each other to form a fitting recess 18 (see FIG. 22). Both inclined upright walls 13b of the fitting recess 18 of the bent portion of the square pipe 10 bent in this way,
One end of the other square vibrator 20 bent into a mouth shape at 13b is fitted and joined in a positioned state.

OLiiuLM FIGS. 24(a) and 24(b) are a plan view and a front view of the first concave notch and V-shaped notch of one square pipe of the fourth modification, and FIG. 25 is its bent state. The plan view of the 26th
Figures (a) and (b) are plan views and front views of the second concave notch 12 and the V-shaped notch formed at different positions on one square pipe, and Figure 27 is the bent state. 28(a) to (C) are respectively a plan view, a rear view, and a side view of the state in which the other square vibrator is joined to both bent portions of one of the square pipes. It is shown.

In this case, the first concave notch 12 has a shape having an upright wall 13a perpendicular to the square vibe 10 and an inclined upright wall 13b at an angle of about 135° to one side of the square pipe 10. The V-shaped notch 14 of No. 1 has an opening located at the widening side of the right-angled upright wall 13a and the inclined upright wall 13b.
It is formed at an angle of 5 degrees, and its apex corner is formed into a small arc shape. In addition, the second concave notches 12 stand up at a symmetrical angle of about 135° with respect to the corner vibe! l
13b, 13b, and the second V
The letter-shaped notch 14 is formed at an angle of approximately 135° with the opening located outward from the inwardly inclined upright walls 13b, 13b on the expanding side of the inwardly inclined upright walls 13b, 13b, and its top angle is small. It is formed in an arc shape. Therefore, when the square vibrator 10 is bent at the V-shaped notch 14, the bending portion will be bent.

Two bent portions each having a bending angle of 45° are formed, and fitting recesses 18, 18 that are perpendicular to each other are formed in both bent portions (see FIGS. 25 and 27). . Each of the upright walls 13a, 13a; 1 of the fitting recess 18.18 of the bent portion of one of the square vibrators 10 bent in this way;
3b, 13b Both ends of the other square pipe 20 bent into a D-shape are fitted and joined in a positioned state.

In the above embodiments, the rod material is a square pipe. However, the rod material does not necessarily have to be a square pipe, and may be a solid material with a square cross section. In addition, the bar material is not limited to a square pipe or a solid square material,
Even if it is of any shape, such as a round vibrator or a solid round material, it can be bent and joined in the same way.

The case where the bar material is a round pipe will be explained below.

015 Koko 1 FIGS. 29(a) and 29(b) are a plan view and a front view of the round vibe 11, which is one bar of the fifth modification, and FIG. 30(a).
) and (b) are a plan view and a side view of the joined state, and FIG. 31 is a sectional view of the joined portion of one of the round pipes 11.

In this case, the concave cutout 12 is formed by a pair of right-angled upstanding walls 13a.
, 13a, and the V-shaped notch 14 is approximately 45 mm.
When the round pipe 11 is bent, a rectangular fitting recess 18 is formed.

Fitting recess 1 of one round pipe 11 formed in this way
The end of the other round pipe 21 is positioned within the pipe 8 and is fitted and joined. In addition, as shown in FIG. 31, the joint part of one round pipe 11
1a, and other joints are connected by fixing means such as welding.

Figures 32 (a) and (b) are a plan view and a front view of one round vibrator 11 of the sixth modification, and Figures 33 (a) and (b)
shows a plan view and a side view of the bonded state.

In this case, the concave cutout 12 is formed by a pair of right-angled upstanding walls 13a.
, the other round pipe 2 is attached to the side end of the V-shaped notch of 13a.
1, and the V-shaped notch 14 is formed at an angle of about 45°, so that when the round pipe 11 is bent, one corner is formed. A rectangular fitting recess 18 having an arcuate portion is formed. The end of the other round pipe 21 is positioned and fitted to the arcuate portion and bottom of the fitting recess 18 of the one round pipe 11 thus formed.

◎Seventh Modification Figures 34(a) and (b) are a plan view and a front view of one round vibrator 11 of the seventh modification, and Figures 35(a) and (b)
shows a plan view and a side view of the bonded state.

In this case, the concave cutout 12 is formed by a pair of arcuate standing walls 13d.
, 13d, and the ■-shaped notch 14 is approximately 45
A fitting recess 18 is formed at an angle of ``'', and has an arcuate shape in which about 2/3 of the round pipe 11 matches the circumferential surface of the other round pipe 21 when the round pipe 11 is bent. The end of the other round pipe 21 is positioned and connected to the arcuate portion and bottom of the fitting recess 18 of the one round pipe 11 formed in the round pipe 11 .

018 Koko 1 Figures 36(a) and (b) are a plan view and a front view of one round vibrator 11 of the eighth modification, and Figures 37(a) and (b)
are a plan view and a side view of the bonded state, and the third
FIG. 8 shows a sectional view of the joint of one round pipe 11.

This eighth modification is a case in which consideration has been given to giving even greater strength to the fifth modification. That is, the concave cutout 1
This is a case where the depth of the notch 2 is made shallower and the area of the notch remaining portion 11a is made larger than that of the fifth modification, thereby providing further strength. Note that in this eighth modification, other parts are the same as in the fifth modification, so the same parts are given the same reference numerals and the explanation thereof will be omitted.

[Effects of the Invention] As explained above, according to the bending and joining method of the present invention, a concave notch is provided on any side surface of one of the bars to be joined, and a concave notch is provided at the bottom of the concave notch. After providing a V-shaped notch in a direction perpendicular to the concave notch, the bar is bent at an appropriate angle at the V-shaped notch to form a fitting recess at the corner, and Since the end of the other bar to be joined into the fitting recess is fitted and fixed, the following effects can be obtained.

1) Since a concave notch and a V-shaped notch are formed in the bar,
The bar can be easily bent, and at the same time, a fitting recess for joining the other bar can be easily formed.

2) The V-shaped notch allows for horizontal positioning, and the upright wall of the concave notch allows for vertical positioning, so three-dimensional positioning is possible.

3) By setting the shape of the concave notch and/or the angle of the V-shaped notch to an arbitrary shape and angle, it is possible to easily obtain the angle of the bent part and the shape of the fitting recess according to the purpose. .

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of a state joined by the bending and joining method in this invention, Fig. 2 is an exploded perspective view thereof, and Fig. 3 is a perspective view of a state in which a concave notch in this invention is processed. , FIG. 4 is a perspective view of the V-shaped notch according to the present invention in a processed state, FIGS. 5(a) and (b) are a plan view and a front view of FIG. 4, and FIG. Plan, 7th
The figure is a schematic front view of the concave notch processing device, FIG. 8 is a perspective view of the bar set mandrel in the concave notch processing device, and FIG.
10 is a schematic side view showing the processing state of the concave notch processing device, FIG. 11 is a schematic front view of the V-shaped notch processing device, FIG. 12 is a side view thereof, and FIGS. 13 and 14. The figure is a schematic side view showing the machining state of the V-shaped notch, and Figure 15 (
a) and (b) are a plan view and a front view of the first modification of the bar, FIG. 16 is a plan view of the first modification in a bent state, and FIG.
Figures (a) to (C) are a plan view, rear view, and side view of the joined state of the first modification, and Figures (a) and (b) are the second modification of the bar.
A plan view and a front view of the modified example, FIG. 19 is a plan view of the second modified example in a bent state, and FIGS. 20 (a) to (C) are a plan view and a rear view of the second modified example in a joined state. and a side view, FIGS. 21(a) and 21(b) are a plan view and a front view of the third modified example of the bar, and FIG. 22 is a plan view of the third modified example in a bent state, and FIG.
3 (a) to (C) are plan views of the joined state of the third modification,
A rear view and a side view, FIGS. 24(a) and 24(b) are a plan view and a front view of the first concave notch and V-shaped notch of the fourth modification of the bar, and FIG. 25 is a front view thereof. Plan view of folded state, 2nd
6(a) and (b) are a plan view and a front view of the second concave notch and V-shaped notch of the fourth modification, FIG. 27 is a plan view of the bent state, and FIG. 28 (a) to (C) are a plan view, a back view, and a side view of the joined state of the fourth modification, and Fig. 29 (
a) and (b) are a plan view and a front view of the fifth modification of the bar, FIGS. 30 (a) and (b) are a plan view and a side view of the joined state of the fifth modification, and FIG. The figure is a cross-sectional view of the joint part of the bar in the fifth modification, FIGS. 32(a) and 32(b) are a plan view and a front view of the sixth modification of the bar, and FIG.
(b) is a plan view and a side view of the joined state of the sixth modification, FIGS. 34(a) and (b) are a plan view and a front view of the seventh modification of the bar, and FIG. 35(a) ), (b) are a plan view and a side view of the joined state of the seventh modification, FIG. 36 (a),
(b) is a plan view and a front view of the eighth modification of the bar, FIGS. 37(a) and (b) are a plan view and a side view of the eighth modification, and FIG. 38 is the eighth modification. FIG. Code explanation (10)...One square pipe (bar) (11)...
One round vibe (bar) (12)... Concave cutout (trowel-shaped cutout) (13)... Standing wall (13a)... Right angle standing wall (13b)... Inclined standing wall (13c)... Small arc portion (13d)... Arc-shaped standing wall (14)... V-shaped notch (18>... Fitting recess (20)... Other square pipe ( bar) (21)...
Patent applicant for the other round pipe Fuji Xerox Co., Ltd. Representative Patent attorney Tomohiro Nakamura (3 others) Figure 2 Figure 3 Figure 5 Figure 6 Figure 7 Figure 8 Figure 2b Figure 9! 1-...-41 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Ca) (C) (b) Figure 18 Figure 19 Figure 2o (a) (C) (b) Fig. 21] 4° 22 Fig. 23 (b) 2° (C) Fig. 28 (c) (b) Fig. 29 I+ = One round vibrator (bar) No. 32
0 "°°"/l゛Fl'fiゝ(a)
(b) Fig. 34 +3d: Arc-shaped standing wall Fig. 35 (a) (b) Fig. 36

Claims (1)

[Claims] A concave notch is provided on any side surface of one of the bars to be joined, and a cross-shaped notch is provided at the bottom of the concave notch in a direction perpendicular to the concave notch, and then the V-shaped notch is The bar is bent at an appropriate angle to form a fitting recess in the corner thereof, and the end of the other bar to be joined is fitted and fixed into the fitting recess. A distinctive method of bending and joining bars.