JPH03275238A - Forming method for loop member to be formed - Google Patents

Abstract

PURPOSE:To form a loop member to be formed such as a temporarily flatly formed metallic combined band in a prescribed shape by pressurizing the inner wall surface of a member to be formed simultaneously with the outer surface of each pressurizing member to be widened in a stretched state. CONSTITUTION:A pressurizing member is arranged on the inside of the loop member to be formed such as the metallic combined band, each pressurizing member is moved outward in the radial direction, the inner wall surface of the member to be formed is pressurized simultaneously by the outer surface of each pressurizing member to be widened in the stretched state and the member to be formed is pressurized in the desired shape to widen the member to be formed in the stretched state. Consequently, it is possible to obtain a metallic combined band 1 high in accuracy which is provided with a band part 2 formed nearly in the complete roundness state.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention provides a loop-shaped material that is formed into a predetermined shape to obtain a loop-shaped member such as a metal coupling band used for tightening hoses, tightening boots of universal joints, etc. The present invention relates to a method for molding a member to be molded.

(Prior Art) The loop-shaped object of the present invention is a metal coupling band 1 shown in FIGS. 7 and 8. This metal joint hand 1 has already been proposed by the applicant of the present invention (Japanese Patent Publication No. 14702/1983). To explain this metal joint hand 1, it includes a band part 2 formed into a ring shape by cutting a band-shaped steel material into a predetermined length, a lever 3 which is welded to the overlapping end of this band part 2 and formed into a curve. It consists of a fastener 4, which is made by cutting a steel band to a predetermined length, bending it into a U-shape, and welding it to a predetermined position of the band 2 with both ends facing outward.

Additionally, the applicant has already proposed a manufacturing device for automatically manufacturing this metal bonding band 1 (Japanese Patent Publication No. 58-2
No. 5550).

(Problem to be Solved by the Invention) However, in the above-mentioned metal joint hand manufacturing apparatus, the end 2a of the band 2 and the end 3a of the lever 3 are overlapped and welded. As shown in FIG. 9, the portion 2 is formed flat. For this reason, it becomes difficult to insert a hose or the like into the band portion 2.

The present invention has been made in view of the above-mentioned problems, and is directed to forming a loop-shaped member for forming a loop-shaped bottomed part assembly such as a flat plate-formed metal joint hand into a predetermined shape. The purpose is to provide a method.

(Means for Solving the Problems) In order to solve the problems described in -, the present invention has the following configuration.

That is, the inner side of the member to be formed, which has been temporarily formed into a looped state. Arrange the plurality of pressing members 1, move each pressing member outward in the radial direction, press the inner wall surface of the to-be-formed member at the same time with the surface of each pressing member, and spread the to-be-formed member into an elongated state. It is characterized by deforming into a desired shape.

(effect) The effect will be explained.

A pressing member is placed inside a loop-shaped member to be formed, such as a metal joint hand, and each pressing member is moved radially outward to simultaneously press the inner wall surface of the member to be formed with the outer surface of each pressing member and elongate it. The member to be formed is pressed into a desired shape by spreading it into a stretched state.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a front view of a forming machine for forming a loop-shaped member, and FIG. 2 is a plan view.

The forming machine 10 of this embodiment includes a firmness removing mechanism 12 that removes firmness of the lever 3 of the metal coupling band 1, a lever forming mechanism 14 that forms the lever 3 of the metal coupling band 1"1 into an arc shape, First, the firmness removing mechanism 12 and the lever forming mechanism 14 will be explained with reference to FIGS. 1 to 5. do.

A deburring mechanism 12 and a lever forming mechanism 14 are provided on the left side of the machine frame 18 on which the molding machine 10 is placed, in FIGS. 1 and 2.

Reference numeral 20 denotes a base, and a convex dovetail 20a extending in the direction of the arrow is formed on the upper surface of the base 20. The tip end side (forming mechanism 16 side) of this base 20 is fixed by being brought into contact with a rotary pedestal 22 . Also, dovetail 20a on the top surface of base 20! The dovetail groove 24a on the lower surface of the temporary slide 24 engages with the temporary slide 24 so that it can slide freely. A longitudinal groove 26 is formed on the upper surface of the slide plate 24. In addition, a concave groove 1 is provided at the tip of the slide plate 24.
A step 28 having the same height as 6 is formed. Further, an actuating plate 30 is disposed within the groove 26 and is movable in the longitudinal direction within the groove 26 while being guided by the groove 26 . A thin operating plate 30a is formed at the tip of the operating plate 30 and extends continuously from the upper surface of the operating plate 30 (extending like a canopy), and a space is formed below the operating plate 30a.

On the other hand, the mounting plate 32 is placed on the step 28 at the tip of the slide plate 24.
is fixed (approximately half the number of placing plates 32 are placed on the step 28), and the two sides of this placing plate 32 and the lower surface of the operation plate 30a are formed at a height that substantially coincides with each other.

In addition, the longitudinal direction of the operating plate 30 from the distal end surface of the operating plate 30 (
Two holes 30b are bored toward the rear), and springs 34 and 34 are arranged in these holes 30a and 30b,
The tip of this spring 34.34 hits the mounting plate 32 and urges it away from the actuating plate 30 (see Figure 3).
. Further, four groove-shaped portions 30c are formed on the upper surface of the operation portion 30a of the operation plate 30.

Further, an upright wall 36 for fixing the cylinder is fixed in contact with the rear end of the base 20. The tip of a plunger 38 a of a cylinder 38 fixed to the upright wall 36 and driven by pneumatic or hydraulic pressure is connected to the rear end of the operating plate 30 .

A stopper block 40 is fixed on the slide plate 24 so as to straddle the groove 26 of the slide plate 24.

Further, a threaded rod 44 is longitudinally engaged with a stopper 42 fixed on the operating plate 30 that moves along the groove 26 of the slide plate 24.

The rear end of this threaded rod 44 hits the stopper block 40, and positions the operating plate 30 in the retreated position.

Reference numeral 46 denotes a positioning tool for placing the mounting plate 32 of the metal joint hand. This positioning tool 46
It is placed on the mounting plate 32 of the step 28 of the slide plate 24 via a flat trapezoid-shaped fixture 4B fixed to the slide plate 24. Further, a portion of the positioning tool 46 on the mounting plate 32 is formed thinner toward the center, and is provided with a notch 46a for determining the position of the metal coupling hand 1.

The flat band portion 2 of the metal connecting hand 1 is inserted into this notch 46a.
is located. An upright wall 32a is formed on the mounting plate 32 at a portion facing the positioning tool 46, and the tip of the lever 3 of the metal joint hunt 1 hits the upright wall 32a and is positioned.

A step 50 is formed on the slide plate 24 side of the bending table 22, and is formed at the same height as the step 28 of the slide plate 24. When the cylinder 3 is driven, the operating plate 30 moves forward, and the springs 34, 34 are attached between the mounting plate 32 and the holes 30b, 30b of the operating plate 30.
Since the mounting plate 32 is biased in the direction of separation through
slide together. Moreover, since the mounting plate 32 and the slide plate 24 are fixed integrally, they slide together with the operating plate 30. Then, the end surface of the slide plate 24 and the end surface of the bending table 22 collide (the end surface of the mounting plate 32
). The mounting plate 32 rests on both the step 28 of the slide plate 24 and the step 50 of the bending table 33. Furthermore, since the operating plate 30 is pushed forward against the biasing force of the springs 34, 34, the flat metal coupling band l held in the notch 46a of the positioning tool 46 together with the operating plate 30 is The stylus 1' is passed over 32 and sent to a predetermined position on the bending table 22. A lower die 52 for forming the lever 3 into an arc shape is disposed at a position corresponding to the lever 3 of the metal coupling hand 1 that has been sent.

A step portion 52a is formed in the lower die 52, following the step at the joint between the lever 3 and the band portion 2. Further, an eject bin 56, which is biased by a spring 54, protrudes from the bottom surface of the lower mold 52 so as to be removable and removable (see FIGS. 3 and 4).

A moving block 6 in which a punch 56 corresponding to the lower die 52 moves up and down along a support 58 provided in line with the bending table 22.
Fixed to 0. A bottomed hole 62 is bored upward from the lower surface of the moving block 60, and a bar 64 that stands up from the bending table 22 enters this hole 662. Further, a long spring 66 is arranged so as to wind around the bar 64, and urges the moving block 60 upward (in the direction away from the bending table 22) (see FIG. 5).

On the other hand, an arm t168 is pivotally attached to the top of the support column 5B via a shaft 69, the tip of the arm member 68 is in contact with the upper surface of the moving block 60, and the rear end of the arm member 68 is connected to the plunger 70a of the cylinder 70. There is. For this reason, cylinder 7
0 is driven to extend the plunger 70a upward, the arm member 68 rotates about the shaft 69, and the tip of the arm member 68 pushes down the moving block 60. Then, when the drive of the cylinder 70 is released, the movable block 60 is pushed upward by the biasing force of the spring 66.

A firmness removing mechanism 12 is provided on the base 20 side of the support column 58. This firmness removing mechanism 12 will be explained.

A fixed plate 80 is fixed to the support column 5B, and a side surface of the fixed plate 80 is in contact with the movable block 60. Further, a tapered surface 80 with an approximately 45 degree inclination is provided at the bottom of the fixed plate 80.
A is formed on the tapered surface 80a, and a crushing rotating body 82 for crushing the edge of the end 3a of the lever 3 of the metal coupling hand 1 is provided in a rotatable manner. It is preferable to use a radial hair ring or the like for this crushing rotating body 82. Then, when the firm part of the lever 3 passes below the corner 82a of the crushing rotating body 82, the firm part is removed. On the other hand, a planar support frame 84 is fixed from the fixed plate 80 so as to surround the moving block 60, and has the role of a guide for the moving block 60 (see FIG. 2).

86 is a stopper plate located ahead of the bending table 22;
This stopper plate 86 is a guide groove (
(not shown) so that the front end of the bending table 22 can be closed. This stopper plate 86 is connected to a plunger 90a of a cylinder 90, which is fixed to a fixed piece 88 fixed to the edge of the machine frame 18.

Next, the loop forming mechanism 16 will be explained. This loop-forming mechanism 16 is formed on the upper machine frame 1 in FIGS. 1 and 2.
It is located on the right side of 8.

The loop forming mechanism 16 will be explained with reference to FIGS. 1, 2, and 6.

92 is a base member of the loop forming mechanism 16, and on the upper surface of this base member 92, a convex dovetail 92a is formed in the elongated direction. 94 is a slide block, and this slide block 94 has a dovetail groove 94a formed on its lower surface, and is slidable by engaging with a dovetail 92a of the base member 92. A fixing plate 96 is erected at the rear of the base member 92, and a cylinder 98 is fixed thereto. A plunger 98a of this cylinder 98 is connected to a slide block 94, and the slide block 94 is moved by the driving force of the cylinder 98.

An upright wall 100 is erected on two sides of the rear section of the slide block 94, and a through hole 102 is bored in the center of the upright wall 100, and a rod-shaped wire as a pressing member is installed around the through hole 102. The rear end of 104 is planted so as to draw an imaginary circle. Therefore, the entire wire 104 is arranged as if it were located on the outer peripheral surface of the virtual cylinder.

A cylinder block 108 is fixed to the back surface of the upright wall 100, and a cylinder 110 is fixed to this cylinder block 108. Plunger 110a of cylinder 110
A drive bar 112 extends from the through hole 120 of the upright wall 100.
It is connected with. A disc-shaped restriction portion 114 is fixed to the tip of the drive bar 112. The same number of through holes 116 as the wires 104 are bored in the outer peripheral portion of the regulating member 114 in a circular shape. The wires 104 pass through the through holes 116 and extend forward, and the tips in the direction of extension are free ends.

Further, a guide wall 11B extending in the width direction is fixed to the distal end surface of the slide block 94, and the center of this guide wall 118 has a notch 1 for the wires 104 to extend forward.
19 is formed. Fixed pieces 120 and 120 for fixing the cylinder are fixed to both ends of the guide wall 118, and this fixed piece 1
A cylinder 122° 122 is fixed to each of the cylinders 20 and 120. This cylinder 122゜122 plunge +
122a, 122a are connected to slide pieces 124.124. A convex portion 124aX 124a is formed on the surface of this slide piece 124.124 that contacts the guide wall 118. The protrusions 124a, 124a are groove-shaped recesses 11 carved in the width direction on the front surface of the guide wall 118.
8a, the two slide pieces 124°124 slide toward and away from each other.

Furthermore, pressing plates 126 and 128 are fixed to the front surfaces of the slide pieces 124 and 124, respectively.

Opposing portions of the pressing plates 126 and 128 gradually become narrower and have semicircular notches 126a and 128a in the center.
is formed. A guide plate 128b is fixed thereto, which is formed by cutting a cylindrical body with one notch 128a tapered at the tip along the axis. For this reason, the pressing plate 126.
Wires 104 extending forward from intervals of 128...
* is a push plate 126. As the pressure plates 126 and 12 move in the approaching direction, the diameter of the wires 104 is reduced by the mutual notches 126a and 128a (guide plate 128b).

The pressure plates 126 and 128 reduce the diameter of the free end of the wire 104, and constitute a narrowing means.

The operation of the molding machine of the above-mentioned embodiment will be explained.

(a) First, the flat metal coupling hand 1 is placed R on the mounting plate 32. At this time, place the tip of the lever 3 on the upright wall 32.
a, and at the same time, the flat band portion 2 is attached to the notch 46a of the positioning tool 46.

(b) When the cylinder 38 is driven, the operating plate 30, the mounting plate 32, and the slide plate 24 slide together along the dovetail 20a toward the bending table 22.

Then, the side surfaces of the step 50 of the bending table 22 and the step 28 of the slide plate 24 touch, and the bottom surface of the front end of the mounting plate 32 enters (moves forward) so as to contact the step 50 of the bending table 22.

(C) Subsequently, the operating plate 30 is pushed, and the operating plate 30a moves forward against the biasing force of the springs 34 and 34 interposed between the mounting plate 32 and the operating plate 30, and as a result, the operating plate The positioning tool 4G fixed to the bending table 22 also advances to send the metal joining hand 1 to the position of the lower die 52 of the bending table 22. At this time, the lever 3 of the metal joint hunt "1 is moved to the crushing rotating body 8.
2 and the firmness is removed. The recesses 30c of the operation plate 30 and the operation plate 30a are relief grooves for the crushing rotating body 82.

(d) Metal binding hunt located at the lower mold 52"
The overlapping part (!! seam) between the lever 3 and the band part 2 of 1 is formed into an arc shape by lowering the punch 56 (the operation of the punch 56 has been described above, so it will be omitted).

(b) While the lower mold 52 and the punch 56 are holding the metal joint hand], the operating plate 30 (the operating plate 30a and the positioning tool 46) moves backward.

(f) On the other hand, in the loop forming mechanism 16, the cylinders 122 and 122 are operated to press the pressing plate 126° and 128°.
The wires 104 are brought closer together to reduce the diameter of the wires 104 (as shown by the two-dot chain line in FIG. 1). In this state, the cylinder 98 is operated to move the slide block 94 forward. Then, the lower mold 52
The lever 3 is held between the punches 56 and the band portion 2 is slightly lifted from the lower mold 52 inside the band portion 2 of the metal binding band 1.
Insert the tips of the wires 104 that have been compressed by pressing plates 126 and 128 (shrinking means).

Then, at the same time as the punch 56 is raised, the cylinder 1
02.102 is activated to release the reduced diameter state of the wires 104, and the tips (free ends) of the wires 104 become free, expand in diameter, and hold the metal coupling hand 1.

(g) While holding the metal coupling band 1 with the wires 104..., operate the cylinder 98 to move the slide block 94 slightly backward. Then, the cylinder 90 is operated to position the stopper plate 86 in front of the metal binding band 1.

(h) Then, the cylinder 110 is operated to advance the regulating member 114 via the drive bar 112. Then, the diameter of the wires 104 is expanded all at once to the same extent as the through holes 116 of the regulating member 114 are located, and the band portion 2 of the metal coupling hand 1 is formed into a circular shape. At this time, the stopper plate 86 is located behind the metal coupling hand 1, and the metal coupling hand 1 is connected to the wire 10.
4 Prevents it from coming off.

0) Subsequently, when the cylinder 98 operates and the slide block 94 retreats, the cylinder 130 operates and drops the metal joint hand 1 with the band 2 formed into a circular shape, bending the bending table 22 into a loop shape. An appropriate storage case (not shown) below the hole 132 formed in the machine frame 18 between the forming mechanisms 16
It is stored in etc.

The same operations as above are repeated to sequentially form the combined hands in a circular shape.

Through the above-described process, a highly accurate metal connecting hand 1 having a band portion 2 formed in a substantially perfect circle shape is obtained. That is,
Metal joint hand 1 using multiple wires (pressing part wires)
The metal coupling hand 1 can be expanded in the elongated direction by pressing radially outward from the inside.

6. A loop-shaped member having a predetermined width can be formed into a perfect circle using the loop-forming mechanism of the above-mentioned molding machine, but if the member to be formed is not circular, but oval, triangular, or
Even polygonal shapes such as squares may be arranged so as to be located on the outer circumferential surface of the shape to obtain the implanted shape of the pressing member such as the wire and the shape formed by the through hole of the regulating member.

Note that the pressing member includes a rod-like body such as a wire or a narrow plate-like body. Moreover, the diameter of a plurality of pieces is not limited to a rod-shaped body, and the diameter of the pieces can be reduced or expanded, and the pieces may be placed inside a member to be formed, and the member to be formed may be expanded into an elongated state to be formed into a desired shape.

Although various explanations have been given above with reference to preferred embodiments of the present invention, the present invention is not limited to the above embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. It is.

(Effects of the Invention) As described above, the present invention allows a loop-shaped member to be formed (such as a metal joint hand) that is temporarily formed into a flat cylinder to be pressed inside the member to be formed with a plurality of pressing members reduced in diameter. The molded member is inserted into the mold and pressed radially outward from the inside to expand the molded member into an elongated state, and has great effects such as being able to reliably mold it into a desired shape.

[Brief explanation of drawings]

1 to 6 show an embodiment of a molding machine for a loop-shaped member according to the present invention, FIG. 1 is a front view, FIG. 2 is a plan view, and FIG. 3 is a molding machine for a loop-shaped member. FIG. 4 is a side view showing a portion of the molding machine for the loop-shaped member to be formed; FIG. 5 is a view of the molding machine in the direction of arrow B in FIG. 1;
FIG. 6 is a view of the molding machine in the direction of arrow A in FIG. 1. 7th
8 is a front view of the metal binding hand in the tightened state, and FIG. 9 is a perspective view of the metal binding hand in the tightened state. 10... Molding machine, 12... Harness removal mechanism, 14...
・Lever forming mechanism, 16... Loop forming mechanism, 18... Machine frame, 20... Base, 24... Slide plate, 30... Operating plate, lO4...
-Wire, 114...Regulation member, 126.128...Press plate.

Claims (1)

[Claims] 1. Arrange a plurality of pressing members inside the molded member that has been temporarily formed into a connected loop shape, and move each pressing member radially outward so that the outer surface of each pressing member touches the inner wall surface of the molded member. A method for forming a loop-shaped member, characterized in that the member to be formed is deformed into a desired shape by pressing the members all at once and expanding them into an elongated state.