JPS59120328A - Forming method of end part of square pipe - Google Patents

Abstract

PURPOSE:To facilitate forming without having any notched or weld part and to improved strength and rigidity by forming the end part of a square pipe to a convergent tapered shape having the crushed top and bottom and bulging the side face in the end part toward the outside. CONSTITUTION:When a lifting table 33 is lowered, a cam face 31 engages with the cam face 30 of a forming die 28, and the die 28 quided by a groove 27 is slided backward in an axial direction by the effect of the cam faces 31, 30. A forming part 29 fits to the top end of a pipe 1, then the top end is bent from the uppermost end in a vertical direction and is formed to a convergent tapered shape between said forming part and the top end part 26C of a core. On the other hand, the side piece in the part to be worked of the pipe 1 is regulated on the inside by both sides of the part 26C of the core and is thus made prohibitive to deform toward the inside direction. On the other hand, both inner sides of the part 29 have clearances and therefore both side parts are bulged outward in a semi-circular shape.

Description

[Detailed Description of the Invention] The present invention is suitable for welding a vibrator or a shaft member to an end.
- Concerns the forming force method for the end of a square vibrator.

Square pipe molded products are used for the rear forks of motorcycles, etc. As is known, the rear fork has a vibe between the front ends of the left and right vibe members so as to be perpendicular to the axial direction of the members.
or shaft-shaped pivot members are welded.

In the case of welding the piezoelectric material and the inner 111-shaped part 4 to such an end part, the end part is conventionally formed as shown in FIGS. 11 to 15.

That is, as shown in FIG. 12, a V-shaped J cutout 63 is provided on both sides 62 and 62 of the end 61 of the square vibro 0 as shown in FIG. Then, the end portion 61 is pressed and crushed from above to close the notch 63, and the end portion is formed into a kedeber shape as shown in FIG. 13. The closed slit portion 64 is welded and joined. Then, as shown in FIG. 14, four semicircular sections 6 are attached to the edge 65 corresponding to the diameter of the vibrator or shaft to be connected to the section.
6 is formed by notching or forging.

Below'2 conventional molding method 1d1, Forming of type notch - L step,
The welding process of the overlapped slit parts, etc., is completely required, the number of T is large, workability and productivity are poor, and it is disadvantageous in terms of cost. Although it is difficult to say that it is the best in terms of rigidity, the welded portion 67 is within the width W of the square pipe as shown in FIG.

The present invention has been made to improve the following.

The object of the present invention (1) is that it is easy to achieve and can be achieved with a minimum cost of about 1. His own strength ((, Tsuyoshi V
In addition to the published version 11-1, we will also present a method for forming the end of a square vibrator using pipe silk, ili+, and welding.

My duty is to achieve the above 1-'ll objective by adjusting the end of the square vibrator to fit the shape of the inner L fC tapered core (pressurizing the end of the square vibrator). 1 is formed into a tapered Buber shape 5, and the lateral surface of the end portion is formed so as to bulge in response to an outward force L7.

Next, A--Preferences of the invention--Example 14 (according to the accompanying drawings of BJ example) will be described in detail.

1 to 5 are explanatory diagrams showing a molding method according to the present invention; FIG.

Figure 1 is the 21SF congratulatory map of Kaku Vibe 1, Ba Eve 1i7
1 For example, horizontally long 91j shape l, 1 [Menkina +-,,,,-
1 Lower bars 2, 3 and right S right side pieces 4, 5 to f? vinegar,
Cut the pipe to a fixed length and cut the pipe to a fixed length (3, -1 of the toe end 6, make the lower pieces 4 and 5 taper) from the knee 1. l"L2, don't approach the end force surface 11 <#t+1i'i 7 t 84-
'to form a 91 taper j--of the end 6 in the form of a bar.
While forming I site as oblique +fi 7 +8,
Under this forming process, 9,104 J-[Me, this J7? I'J4 shows L2 in the figure, and J1 on both sides of the end L7 formed as shown in 1-1 below.
Edge 11 i'(': Vibrator material, shaft 9 ! Four semicircular parts 12 corresponding to the diameter of Ij are J-cut or forged-C+1<
2, FIG.

(A base 23 having a flat surface 22 is fixedly erected at a portion 1'4 near one end in the length direction of the base 211.)
Turn 4JJ in the base 23, install the shaft 24 vertically ~, turn the shaft 2
4 upper end 4/base 231. A handle 25 is provided on the iPX I/. 18 units 21 ,,,L, is parallel to this one land, surface and 1iJ-r
Arrange the cores 26 so that they are spaced apart, and set the center 1'26 no+()'Xl! 26 a l", i base 23 and the current surface 22 are connected to the shaft 24 inside -C [-7,
For the time being, the base 26a of the core 26 is swung by a predetermined angle IW to the right in the horizontal plane by 11 degrees, and there is a gap 11 inches wide and 3-7" wide. The base 26a Ij of 26, the aperture formed to tightly fit with the inner periphery of the pipe 1, and the intermediate part 26b
The tip portion 26 is formed to have a small diameter so as to fit with the vibrator 1.
The base 26d of C is in close contact with the inner periphery of the vibrator, the right side of the chisel is in close contact with the side pieces 4 and 5 of the tip tape 1, and J-T26e
, 26f are set so that they become tapered tapered surfaces that approach the tip force.

Then rotate the handle 25 of the core 26r1 left and right by some 7'L so that the tip 26C faces the outside VC of the base 21. Fit the vibrator 1 from the tip 26C, and All (IC fits. Based on handle 25 5, core 49
Set the 9 units so that they match the axis of the 21, and push the 11 units further in.
2 and turn L7. As shown in FIG. 6, the length from the front end 22 to the tip 26g of the core 26 is equal to the length of the vibrator 1, which is the workpiece.

゛The part J near the other end on the base 21, the length direction of the hip 11,
That is, the mold 2 is slidable in the length direction of the core and the vibrator 1.
Eight molds 28 are arranged on the base 211. It is provided in the front 4-rear direction, and is provided in the snout base 28a that engages with the idle groove 27. The mold 28 has [1-]
A tapered female tapered molded part 29 k+#i which is open in the r-26 direction and whose axial direction is the same as that of the inner core 126 is formed. A tapered 1-lower slope 26e.

26f and the male and female are fitted with a gap equivalent to 11 mm of the flesh of 1.
It is open to the front of 9th ward, 1st tsukuda, and 1st direction.

The rear surface of the mold 28 has a cam 30 formed of an inclined surface, and a lift cup 3 having a cam 31 facing thereto.
Throw 1 2, 32 is 11, move with ram, etc.
``The mold 1 is supported on the descending platform 33, and the mold 28ij No. 6
As shown in the figure, the lowering table 33 is located in front of and separated from the tip of the core and the vibrator 7, and the upper Fr[, 7, and the cutter 32 is separated from the mold 28 and 7 is the state before molding and in the dispensing state. The mold 28 is configured to apply pressure to the separation force using, for example, a spring.
It is placed in the position shown in Fig. 6 by means of a stopper, etc.

By the way, in the width direction of the molded part 29r1 in FIG.
is sufficiently larger than the 1 width of Ba-Eve 1, and set slightly larger than 9 [- minutes after the left and right bulges J mentioned above. , 29f is formed into a chi-bar shape that gradually becomes wider inside.
, above, smell - move 33 platforms, CJ
Due to l) J No. 32 is 1 inch - t, 3 cam and 31 is 1 戊 form) M! t 28 No i, + Engagement L5 to the mu face 30, joint to F movement? 'The force A is 31.30, and the mold 28 is 27 and 1.
te1 Shinsenshi7, I) η11 force direction fixed +llll+ intermediate completion,
Transfer 1 to the 1st bye. Molded part 2 at the tip of vibrator 1
9 are fitted, and the upper and lower walls 29a and 29b of the molded part 29 are 11< as described above, so the tip of the vibrator 1 is relatively thin! Iih L, from the leading edge to -t-t'', bent in the Jj direction, #I5 middle]' Tapered between the tip 26C and the
- Shaped into a bar shape, r, to, l', 7),,
and JLke shown in Figure 7 L7, the tip M of the vibrator 1 (~shi↑L
, 7111F x fL at the lower blade turn, tapered J-bar shape, on the other hand, the vibrator (1 to be shipped - F part side) 1 is inside, both fll of the tip part 26C of middle r-26! l-C,1
, 11I constraint, deformation in the inward direction -\ is impossible. On the other hand, since there is clearance on the inside of the mountain of the molded part 29 as mentioned above, both sides are semicircular (inflated outward). It will be released.

After molding, the Ken f-1 boat platform 33 is disengaged from the cup 32 and the mold 2831-, thereby removing the mold (
51, Released, h, Move to the left in the figure and return to the position before molding in Figure 6. Next, the handle 25 and the handle 24 are fully rotated, and as a result, the base end 13 of the square pipe follows and contacts the surface 22 and is moved by the side force Φ nano, moving in the direction of removal from the core. That will happen. ζ': tT is shown by an imaginary line in FIG.

In this way, the tip can be formed into a shape that is completely tapered and bulges out laterally. Above process i and 1
1101 [The mouth 2 is formed by forging or the like.

Below, in -1-, we will explain an example using molded t-bevel pipes, and in 1-, we will explain the rear four. At the same time as welding the end pieces C and Cf to the rear end, the intermediate i"+
1 spray) D is horizontally joined between the iJ part, and between the tip parts formed according to the above description, for example, a vibe holder E 7- is welded, 16 circumferences of the pipe material E are welded to the fourth part F, Figure 9: Obtain a rear fork with a diameter of 11 mm and a diameter of 4''310.

In the above embodiments, the molding of an angle vibrator with a four-way structure and a four-way rear structure is shown in 1-. AV- is real 14 (target of +j is Renha,
It is.

According to the present invention, as is clear from "-°";h&dimension, notch 21
Culm, square pipe to reduce the welding process (tip C)
It is possible to form a tapered shape, it is easy to form, and it bulges out to the side of the moon.
1. When welding shaft objects, 5. The lateral bulge allows you to obtain a joint that is even larger than the base + 4 method! ■ Due to the increased welding area, the welding strength is the same as before2.
Furthermore, since there are no notches or welds on the side of the tip, it is excellent in terms of strength and rigidity, and since there are no notches or welds, it is also excellent in terms of appearance. 21
It has many advantages such as being advantageous in terms of strikes.

[Brief explanation of the drawing]

Figures 1 to 5 are explanatory diagrams showing the forming process. Figure 1 is a perspective view of the J-angle tube, Figure 2 is a side view of the 1-molding state, and Figure 3 is the 4th part molded t7. Figure 6 is a side view of the molding device. The figure is a view of the same molding, Fig. 8 is an irz view of the same, Fig. 9 is an inside view of the rear wing A, - Fig. 10 is a side view of the same, and Figs. 11 to 15 are conventional views. 3, which is a diagram illustrating the molding process of
In addition, 1 in the drawing is a square pipe, 7, 80. Part of the tapered taper,
12. 12 is a bulge, and 26 is a core. Patent Applicant Hon [11 Giken Dogyo Co., Ltd. Agent Patent Attorney] EE Yobetsu Patent Attorney Hitoshi Hashi Kuni Production Volume
Patent Attorney Koyama I”゛Unexamined Japanese Patent Application Publication No. 12032-12032
8 (5) Supplementary procedure letter (voluntary) ■Display of small items 4! f, N [i 1977 228526
No. 2, Title of the invention Forming method of square piping and piping ends 3, Each small part to be corrected (Relationship with 'I! π1 Applicant (532)
Book F11 Giken - F Industry Co., Ltd. 7-14, Agent 5
Old -1・S・Increase-Add 4 Kidney Rime's awesomeness 6:l/:
Subject of amendment: Set 4 IA1 and Drawing 7g', Supplement 1 [:, Contents (1) Detailed explanation of the invention in the specification as follows) (21) Page 3, line 20 (Me C1 toe 1, piece 4,51
Dodoru is revised to rl lower piece 2, 31 for 11 guests. (1)) From the 15th line 11 to the 16th line of the 5th Tei, “
"Tip 26q" is revised to 1 tip 26q1. fc) Add the following content between page 9, line 4 and line 5 [1]. 1. FIG. 16 to FIG. 23 show modified embodiments of the present invention, and the same parts as those in L are designated by the same reference numerals.
I will only comment on the changed parts. In this embodiment, 1-lower piece 1 of the end 106 of the square pipe 101
02, 103 to 1. Lower ka, ra ka 7. - Figure 8 shows: (Molded into a tapered shape, end 10
6. Form the slopes 107, 108 and j, and perform this forming. □Downward side piece 104. 105, one side piece, for example, the side piece 105, is expanded laterally as shown in Fig. 17 (□109),
FIG. 16 shows an end view of the end 106 of the pipe 101. Next, the above forming will be explained in relation to the apparatus 120 and the 1111 pieces 104 of the pipe 101. 7 right side surface 126h of the tip 126c of the core 1262- which is in close contact with 105, 126
i, 5F), expand the pipe 101] ~ 4) - Provide a recess 140 having a length in the axial direction and opening at the tip 126q of the core 126 on the side surface 126h on the side to be molded 3) On the other hand, the mold 128 The molding part 129 provided in -I
Nido walls 129a and 129b are tapered as shown.
) is formed into a tapered shape, and the inner wall 129 e
, 129)) are formed so as to form a cell j=X in the axial direction. The width of the molded part 129 is the same as the width of the pipe 101.
σ) Inner wall 129e and 6 years old (pipe 101 of same ku1)
(]) A clearance is formed between the side pieces 105'1
, l] so that the opposite inner wall 129b and the side 14104 are in close contact with each other. The inner wall 129 on the recess 140 side of the molded part 129 that takes 1υi
An inner mold 141 for expanding the side piece 105 of the piebe 101 is disposed near e). Inner mold 141 (↑ Core 126
The side surface 142 on the inner wall 129e side of the molded part 129 is tapered, and the first side surface 143 on the inner wall 129b side is tapered.
The inside wall of the mountain was f29 e, 129 b and the crime was carried out by the middle child 1.
A convex portion 144 is provided in the axial direction so as to engage with a concave portion 140 formed in 26. From I- to t-5, when the mold 128 moves toward the core and the vibrator 71 in the same manner as described above, the tip of the pipe 101 relatively slides against the upper and lower walls 129a of the molded portion 129. 129b and the upper and lower slopes 126e of the core tip 126c. Between 126b and 126b, it is bent downward from the leading edge to form a tapered shape. This is shown in Figure 19 as a small l-. When the molding part 129I/i'' arrangement ^L8-inner mold 141 moves in the middle A, P and I directions together with the mold 128, the second
As shown in FIGS. 1 to 213, a convex portion 144 is provided on the side surface 143 of the inner mold 141, and a convex portion 144 is formed on the tip portion 126c of the inner mold and engages with the T-4 portion 140, and the liquid injector portion 1 of the old pipe is The side piece 104 on the opposite side of the recess 140 is regulated on the inside by the wall 1261 of the core tip 126C, and on the outside by the inner wall 129b of the molded part 129, and is impossible to deform. The side piece 105 on the side of the recess 140 is
-J-shaped side wall 142 is expanded laterally. Figure 20 shows the state after molding. Thus, the square pine is tapered and the moon-shaped side pieces are glued l')-,-
,, it can be formed by forming only one side into a U shape that expands laterally. ,) (2) A brief explanation of the drawings (Al, page 9, line 5, g, 1-15, 26 is the core.) is corrected by < = 1 as follows. [Figure 15 is a diagram explaining the process of conventional molding, Figure 16
Figures 2 and 3 are explanatory diagrams showing modified embodiments.
The figure is an end view of the square pipe in the formed state, Fig. 17 is a cross-sectional view of the same, Fig. 18 is a 11tll 'ifxi view of the same, Fig. 19
20th is a side view of the molding equipment during molding, Figure 20 is a top view after the same molding, Figure 21 is an enlarged 3V side view of the main part of the molding equipment before molding, and Figure 22 is a view during the same molding. Figure 23 is the 22nd
Figure A-A shows the diagram. (1)) In page 9, line 7, 11, 112.12 is written as bulge 1, but 19.10 is corrected to bulge -1. (3) Attach the drawings (Figures 2 and 3) (correct as in 1 and add new drawings (Figures 16 to 2:3). 5-8 Attached document 1 ”Record 101

Claims (1)

[Claims] Press the end of the square vibrator so that the interior L2 has a tapered shape and is suitable for the shape of the middle A. A method of forming an end of a 1° angle pipe, characterized in that the side surface of the pipe is bulged by an external force.