KR101507283B1 - Connecting clamp manufacturing apparatus for plastic pipe and the manufacturing method - Google Patents

Abstract

The present invention relates to a clamp manufacturing apparatus to connect a plastic pipe joint, and a manufacturing method thereof. The clamp manufacturing apparatus manufactures a clamp (10) by bending both side ends downward at 90° after forming a plurality of clamping holes (11) and riveting holes (12, 13) respectively in a continuously supplied plate-type material (1). The clamp manufacturing apparatus is composed of a lower die (100) and an upper punch (200) installed by facing each other on the top and bottom, and the clamp (10) is manufactured as the plate-type material (1) is pierced, notched, bent, and cut by being gradually transferred between the lower die (100) and the upper punch (200). Therefore, the present invention can easily and quickly manufacture a clamp of a complex shape which requires a plurality of processes for piercing and notching, and primary and secondary bending using a single mold.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a clamping apparatus for a plastic pipe joint,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus and a method for manufacturing a clamp for connecting a plastic pipe joint, and more particularly, And more particularly, to a manufacturing apparatus and a manufacturing method of a clamp for connecting a plastic pipe joint used.

Generally, when a pipe of a sewer pipe or the like is connected, a separate clamp is used to prevent leakage of the joint of the pipe. Among them, a fixing fixture of Omega (Ω) is wrapped around the outer circumference of the pipe joint, A method of tightly tightening the both ends of the open ends by bolts and nuts to tightly tighten the outer circumferential surface of the pipe to prevent the leakage of the joints is mainly used.

For example, a conventional sewage pipe joining device of the registered utility model No. 0458178 can be used. In such a conventional sewer pipe joining device, a through-hole through which a bolt passes is formed integrally at both ends of an omega-shaped fastener. Since the method of manufacturing the clamps in one piece is difficult to manufacture and is subject to the constraints of the equipment that can be produced, there is considerable difficulty in manufacturing clamps for connecting large diameter pipes.

Accordingly, the omega-shaped fixture is formed of a synthetic resin material such as plastic, a metal clamp is riveted to both ends of the fixture, and the clamps of both sides are fastened to each other using bolts and nuts, Clamps that can wrap the joints of the tube have been developed and used.

The clamp having the above-described structure is formed by a process for forming a plurality of bolt fastening holes, a process for machining a riveting hole, and a bending process of a complicated shape to be fastened and fixed to each other by using the respective devices In this case, it takes a lot of time to manufacture the clamp, and at the same time, the manufacturing cost of the clamp increases greatly.

KR 20-0458178 Y1 KR 10-2012-0111860 A JP 2011-241884 A

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a plastic pipe joint connecting clamp manufacturing apparatus capable of easily and accurately forming a clamp of a metal plate used for connecting plastic pipes And a manufacturing method thereof.

The above and other objects and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which: FIG. 1 is a perspective view of a clamping apparatus according to a first embodiment of the present invention; Bending and cutting so that the clamp is manufactured.

In addition, the present invention is characterized in that the lower die is provided with a plurality of conveying guides which are vertically moved up and down by elastic springs spaced apart from each other by a predetermined distance and are arranged in a plurality of rows, and the both ends of the material are guided by the plurality of conveying guides, It is preferable to be continuously supplied.

According to the present invention, the lower die comprises: a piercing portion having a first piercing hole for forming a fastening hole of the clamp and a second and a third piercing hole for forming a riveting hole, respectively; A notching portion in which a notching hole of an "H" shape is formed so as to catch the material in an "H" shape; A first bending portion formed with a slanting projection for bending at one end formed at the notching portion at a predetermined angle; A secondary bending portion in which a pair of insertion holes are formed at predetermined intervals so as to bend the bending material in the primary bending portion downward at 90 ° with respect to the fastening hole; And a cutting portion formed with cutting holes at both side ends of the bending material in the secondary bending portion.

The present invention also relates to a pneumatic tire comprising an upper plate on which an upper punch has a plurality of punch pins protruded downward from a bottom surface thereof and a lower plate positioned below the upper plate and having a plurality of through holes formed therein so as to protrude downwardly, , And a plurality of springs are preferably provided between the upper plate and the lower plate.

The upper punch includes a first punching pin for forming a fastening hole of the clamp and a second punching pin for forming a second hole for forming a riveting hole, H "-shaped notching protrusion is formed so as to pick up the material in an" H "shape; A first bending portion having an inclined groove formed at an end portion formed at the notch portion to bend at a predetermined angle; A secondary bending part in which a pair of bending blocks are formed at regular intervals so as to bend the bending material in the primary bending part downward at 90 ° with respect to the fastening hole; And a cutting portion formed with a cutting plate for cutting both side ends of the bent material in the secondary bending portion.

In the upper punch, a plurality of pressing protrusions are preferably formed to protrude at one side of the upper punch, which is bent at both ends of the material in a downward bending process at 90 °.

According to another aspect of the present invention, there is provided a method of manufacturing a clamp, the method comprising: positioning a plate-like material on a transfer guide of a lower mold, aligning the lower plate with a transfer guide of the lower mold; lowering the upper mold to form a plurality of fastening holes and a riveting hole; In a piercing step, a work having a plurality of fastening holes and a riveting hole formed therein is moved by a predetermined distance, and then the riveting holes are formed in an "H" shape to form both end portions; A first bending step of moving the notched material by a predetermined distance in the notching step and then bending one end of the material so as to be inclined upward by a predetermined angle; A second bending step of bending the material bent at the first bending step to a predetermined width and then bending both sides of the bending material to 90 ° with reference to the fastening hole; And a cutting step in which the material bent down to 90 ° in the second bending step is moved by a predetermined distance and then both side ends are cut into a single clamp.

According to the present invention, a process of piercing, notching, bending, cutting, and the like is continuously performed in a process of feeding a plate-like metal material having a length to a space between a lower die and an upper punch, When the process is completed, the material is moved to the next process, and the time for rearranging the materials in each mold is shortened. At the same time, there is no position alignment error inevitably occurring in the process of rearranging the materials, .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an example of a clamp manufactured by a clamping apparatus for connecting a plastic pipe joint according to the present invention,
2 is a cross-sectional view showing an example of a clamping apparatus for connecting a plastic pipe joint according to the present invention,
3 is a photograph showing an example in which a clamp is manufactured by supplying a material to a clamping apparatus for connecting a plastic pipe joint according to the present invention,
4 is a perspective view showing an example of a lower die of the present invention,
5 is a photograph showing an example of a lower die of the present invention,
6 is a perspective view showing an example of the upper punch of the present invention,
7 is a photograph showing an example of the upper punch of the present invention,
8 is a flow chart showing an example of a method of manufacturing a clamp for connecting a plastic pipe joint according to the present invention,
9 is a perspective view showing an example in which a workpiece according to the method of manufacturing a clamp for connecting a plastic pipe joint of the present invention is formed and shaped.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to an apparatus and a method for manufacturing a clamp for connecting a plastic pipe joint, which are used to connect and fix a joint of a large-diameter plastic pipe by fixing both ends of a plate-shaped plastic material in contact with each other.

1, a plurality of fastening holes 11 are formed in the upper part of the clamp 10 manufactured by the manufacturing apparatus and the manufacturing method of the present invention. At both ends of the fastening hole 11, (The second and third bending portions B2 and B3). In this process, a plurality of riveting holes 12 and 13 are formed in the portion where the relatively downwardly bent portions are bent. The free ends of the rivets 12 and 13 are bent at a predetermined angle (first bending portion B1).

2 and 3, the apparatus for manufacturing a clamp according to the present invention comprises a lower die 100 and an upper punch 200. At this time, the lower die 100 is provided with a plate- 100 and the upper punch 200 so as to be shifted by a distance corresponding to the width of both sides of the work 1 and conveyed by a conveying guide G provided in a plurality of rows, The clamps 10 are manufactured while the stepping portions 110 and 210, the notching portions 120 and 220, the first bending portions 130 and 230, the second bending portions 140 and 240, do.

At this time, when the upper punch 200 is lowered and brought into close contact with the upper surface of the lower die 100, the conveying guide G is resiliently supported and supported by the lower die 100 by an elastic spring (not shown) The work 1 is lowered by the upper punch 200 and is simultaneously lowered with the conveying guide G.

4 and 5, the lower die 100 of the present invention includes a first piercing hole 111 for forming a fastening hole 11 of the clamp 10, A piercing portion 110 in which second and third piercing holes 112 and 113 are formed to form the first and second punching holes 112 and 113 and a notching hole 121 of "H" A first bending part 130 having an inclined projection 131 bent at one end of the first bending part 130 by bending the first end of the first bending part 120 at a predetermined angle, And a second bending part 140 and a second bending part 140 in which a pair of insertion holes 141 and 142 are formed at regular intervals to bend both ends of the bending material 1 downward at 90 ° with respect to the fastening hole 11, And cutting portions 150 formed with cutting holes 151 at both side ends of the material 1 bent at the car bending portion 140.

At this time, in the secondary bending portion 140, a pair of guide pins (not shown) are formed to protrude through a pair of first piercing holes 111 positioned at both side edges of the first piercing holes 111 formed in the piercing portion 110 The material 1 is positioned and aligned by using the guide pin 143. In the process of bending the material 1, the material 1 is fixed without being moved.

A pair of support pins 144 may be further provided between the pair of guide pins 143 so as to protrude at regular intervals to support the bottom surface of the work 1. The support pins 144 may be provided with a guide G), and is pressed downward as the upper punch 200 is lowered.

The pair of support pins 144 function to support the bottom surface of the work 1 so that the work 1 does not warp or deform in the width direction during secondary bending.

The second bending part 140 is formed with a plurality of concave grooves 145 at regular intervals to form the reinforcing bell 14 at the corner where the second bending part B2 of the clamp 10 is formed This is because the material 1 positioned between the secondary bending portions 140 is bent second by the pressing protrusions 245 formed in the upper punch 200 to be described later and a plurality of reinforcing pieces 14 are formed simultaneously .

The upper punch 200 according to the present invention includes an upper plate 200A having a plurality of punch pins protruded downward from a bottom surface thereof and a lower plate 200B positioned below the upper plate 200A, And a plurality of springs S are provided between the upper plate 200A and the lower plate 200B so that the lower plate 200B is disposed between the lower die 200 and the lower plate 200B. The upper plate 200A is further lowered by an interval between the upper plate 200A and the lower plate 200B while compressing the spring S so that a plurality of Punch pins and blocks are projected down through the through holes of the lower plate 200B.

6 and 7, a first punching pin 211 for forming the fastening hole 11 of the clamp 10, a second punching pin 211 for fastening the fastening hole 11 of the clamp 10, A piercing pin portion 210 in which second and third punching pins 212 and 213 for forming the first and second punching pins 12 and 13 are respectively formed; A first bending part 230 having an inclined groove 231 to bend at one end of the notched part 220 formed at the notch 220 at an angle; And a pair of bending blocks 241 and 242 are formed at regular intervals so as to bend the material 1 bent at the part 230 with respect to the fastening hole 11 by & And a cutting portion 250 where a cutting plate 251 for cutting both side ends of the material 1 bent at the first bending portion 140 and the second bending portion 240 is formed.

The second bending portion 240 of the lower plate 200B of the upper punch 200 is provided with a plurality of pressing protrusions (not shown) for forming reinforcing bars at one side portion bent in the process of bending down the blank 1 to 90 ° 245 are protruded.

In addition, it is preferable that a rectangular receiving groove 232 is further formed between the first bending portion 230 and the second bending portion 240 of the lower plate 200B of the upper punch 200, Even if the upper and lower dies 100 and 200 are in close contact with each other, the first bending portion 230 may be bent in a direction perpendicular to the first bending portion 230, The first bending portion of the material 1 positioned between the second bending portion 240 and the second bending portion 240 is maintained in the first bending shape without being pressurized.

Hereinafter, a method of manufacturing the clamp 10 using the clamp manufacturing apparatus of the present invention will be described.

8 and 9, the plate-like material 1 is mounted on the conveying guide G of the lower mold 100 and the pierced portions 110 and 210 of the upper and lower dies 100 and 200 The upper mold 200 is lowered so that the plurality of fastening holes 11 and the riveting holes 12 and 13 are moved simultaneously by using the first, second and third punching pins 211, 212 and 213 (S10).

The upper mold 200 is then raised and the work 1 is placed on the notches 120 and 220 of the upper and lower molds 100 and 200 and then the upper mold is lowered to the riveting holes 12 and 13 Quot; H "shape using the notching protrusion 221 of the" H "-shaped cross-sectional shape to form both end portions of the clamp 10 (S20).

After the upper mold 200 is raised again, the work 1 is positioned at the first bending portions 130 and 230 of the upper and lower dies 100 and 200 and the lower mold 200 is lowered again, The first bending portion B1 is first bent (S30) so that one end of the notched work 1 is inclined upward by a predetermined angle using the inclined projection 131 formed in the primary bending portion 130 of the metal mold 100 ).

After the primary bending, the upper mold 200 is lifted again, the primary bending material 1 is positioned on the secondary bending portions 140 and 240 of the upper and lower dies 100 and 200, The upper mold 200 is lowered and the both end portions are bent down to 90 degrees by using a pair of the bending blocks 241 and 242 based on the fastening holes 11 formed in the work 1 to perform secondary bending , And three bending portions B2 and B3 (S40).

Then the upper mold 200 is lifted again and the secondary bended workpiece 1 is positioned on the cutouts 150 and 250 of the upper and lower molds 100 and 200 and then the lower mold 200 is lowered (S50) by using a pair of left and right cutting plates 251. The finished single clamp 10 is cut at the same time as the cutting is performed on the inclined surface portion A of the lower mold 100 And is accommodated in a separate storage box.

As described above, the process of piercing, notching, bending, cutting, and the like is continuously performed in a process of feeding a plate-like metal material having a length to a space between a lower die and an upper punch, And the manufacturing cost is reduced.

1: Material 10: Clamp
11: fastening hole 12, 13: riveting hole
14: reinforcement solder 100: lower die
110: Piercing part 111: First piercing hole
112: second piercing hole 113: third piercing hole
120: Notching portion 121: Notching hole
130: primary bending portion 131: oblique projection
140: secondary bending portion 141, 142: insertion hole
143: guide pin 144: support pin
145: groove portion 150:
151: cutting ball 200: upper punch
200A: upper plate 200B: lower plate
210: Piercing part 211: First punching pin
212: second punching pin 213: third punching pin
220: Notching portion 221: Notching projection
230: primary bending portion 231: inclined groove
232: receiving groove 240: second bending portion
241, 242: a bending block 245: a pressing projection
250: Cutting section 251: Cutting plate
A: slope part B1: first bending part
B2: second bending portion B3: third bending portion
G: Feed guide S: Spring

Claims (10)

delete delete A clamp manufacturing apparatus for manufacturing a clamp (10) by forming a plurality of fastening holes (11) and riveting holes (12, 13) in a continuous plate material (1)
The clamp manufacturing apparatus includes:
A lower die 100 and an upper punch 200 facing each other,
The clamp 10 is manufactured by piercing, notching, bending and cutting as the plate material 1 is stepwise moved between one lower die 100 and the upper punch 200,

The lower die 100 is provided with a plurality of conveying guides G which are vertically moved up and down by elastic springs in a plurality of rows spaced apart from each other by a predetermined distance, Continuously fed through the lower die 100 while being guided at both ends thereof,

The lower die (100)
A first piercing hole 111 for forming the fastening hole 11 of the clamp 10 and a second and third piercing holes 112 and 113 for forming the riveting holes 12 and 13 are formed (110);
A notch 120 in which a notched hole 121 having an "H" shape is formed to receive the work 1 in an "H"shape;
A first bending portion 130 having a slanting protrusion 131 bent at one end thereof formed at the notch 120 at an angle to bend;
A pair of insertion holes 141 and 142 are formed at predetermined intervals so as to bend the material 1 bent at the primary bending portion 130 downward at 90 ° with respect to the fastening hole 11 A secondary bending portion 140 which is formed at a lower portion of the bending portion 140;
And a cutting part (150) formed at both side ends of the material (1) bent at the secondary bending part (140) and each having a cutting hole (151).
The method of claim 3,
The upper punch 200 includes an upper plate 200A having a plurality of punch pins protruded downward from a bottom surface thereof and a plurality of punch pins 200b positioned below the upper plate 200A to protrude downward, And a lower plate 200B on which balls are formed,
Wherein a plurality of springs (S) are installed between the upper plate (200A) and the lower plate (200B).
The method of claim 4,
In the upper punch 200,
A first punching pin 211 for forming the fastening hole 11 of the clamp 10 and second and third punching pins 212 and 213 for forming the riveting holes 12 and 13 are formed (210);
A notching portion 220 in which a notching protrusion 221 of an "H" shape is formed to catch the work 1 in an "H"
A primary bending portion 230 having an inclined groove 231 formed at one end of the notched portion 220 so as to bend at a predetermined angle;
A pair of bending blocks 241 and 242 are formed at regular intervals to bend the material 1 bent at the primary bending portion 230 downward at 90 ° with respect to the fastening hole 11 A secondary bending portion 140 which is formed at a lower portion of the bending portion 140;
And a cutting part (250) formed with a cutting plate (251) for cutting both side ends of the material (1) bent at the secondary bending part (240) .
The method of claim 4,
In the upper punch 200,
And a plurality of pressing protrusions (245) protruding to form a reinforcing piece at one side of the bending part in the process of bending down both ends of the material (1) to 90 ° are formed protrudingly. Device.
The plate material 1 is mounted on the transfer guide G of the lower mold 100 and is aligned with the lower mold 100. The upper mold 200 is then lowered to form a plurality of fastening holes 11 and riveting holes 12, A piercing step (SlO) of forming a pillar (10);
The work 1 in which the plurality of fastening holes 11 and the riveting holes 12 are formed is moved by a predetermined distance in the piercing step S10 so that the gap between the rivetting holes 12 and 13 is set to & A notching step (S20) in which both ends are formed in a shape of a letter;
A first bending step (S30) of moving the work (1) notched in the notching step (S20) by a predetermined width and then bending one end of the work (1) so as to be inclined upward by a predetermined angle;
A secondary bending step (S40) of moving the material (1) bent in the primary bending step (S30) by a predetermined width and then bending both sides of the material (1) by 90 DEG with respect to the fastening hole (11);
And a cutting step S50 of moving the material 1 bent downward to 90 ° by a predetermined width in the secondary bending step S40 and then cutting both side ends thereof into a single clamp 10 (EN) A method of manufacturing a clamp for connecting a plastic pipe joint.
The method of claim 7,
The lower die (100)
A first piercing hole 111 for forming the fastening hole 11 of the clamp 10 and a second and third piercing holes 112 and 113 for forming the riveting holes 12 and 13 are formed (110);
A notch 120 in which a notched hole 121 having an "H" shape is formed to receive the work 1 in an "H"shape;
A first bending portion 130 having a slanting protrusion 131 bent at one end thereof formed at the notch 120 at an angle to bend;
A pair of insertion holes 141 and 142 are formed at predetermined intervals so as to bend the material 1 bent at the primary bending portion 130 downward at 90 ° with respect to the fastening hole 11 A secondary bending portion 140 which is formed at a lower portion of the bending portion 140;
And a cutting part (150) having cutting holes (151) at both side ends of the material (1) bent at the secondary bending part (140).
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