CN111408633A - An ultra-thin metal plate welding process, a composite water pipe and its production equipment - Google Patents

Abstract

The invention discloses an ultrathin metal plate welding process, a composite water pipe and production equipment thereof, wherein a first bending roller and a second bending roller are arranged before pipe making processing, and the left side edge and the right side edge of an ultrathin metal plate are downwards turned to form bending parts by utilizing the connection and the matching between a bending groove of the first bending roller and a bending boss of the second bending roller, so that the connection area between the two sides of the ultrathin metal plate is increased by the joint of the two bending parts when the ultrathin metal plate is bent, the welding area is large when the ultrathin metal plate is bent and welded, the connection is more stable after the ultrathin metal plate is welded to form a metal pipe, and the welding quality is higher; in addition, the metal pipe is arranged in the water pipe, so that the service life of the water pipe is longer, and the water pipe can not pollute water.

Description

An ultra-thin metal plate welding process, a composite water pipe and its production equipment

technical field

The invention relates to the technical field of machinery, in particular to an ultra-thin metal plate welding process, a composite water pipe and production equipment thereof.

Background technique

Most of the existing plastic water pipes are usually directly manufactured by injection molding machines. However, after using this type of plastic water pipes for a period of time, the plastic will pollute the water quality. At the same time, during the production of metal pipes, the metal plates are directly rolled into a tubular structure, and then welded. However, due to the thin metal plate thickness of this welding method, the connection area after bending is small, so that the weldable area is small, resulting in weak welding, and the welded metal tube is prone to cracks.

SUMMARY OF THE INVENTION

In view of the deficiencies of the prior art, the purpose of the present invention is to provide an ultra-thin metal plate welding process with high welding quality, a composite water pipe and its production equipment.

In order to achieve the above purpose, the solution provided by the present invention is: an ultra-thin metal plate welding process, comprising the following steps:

S1. Bend both sides of the ultra-thin metal plate upwards or downwards to form bending parts with the same direction on both sides;

S2. Bend the above-mentioned ultra-thin metal plate to make the bending parts on both sides fit together;

S3, welding the bent parts on both sides after bonding to form a metal tube.

A composite water pipe comprises an inner pipe and an outer pipe covering the outer surface of the inner pipe, the outer pipe is a plastic pipe, and the inner pipe is a metal pipe formed by the above-mentioned ultra-thin metal plate welding process.

The present invention also includes production equipment for composite water pipes, the production equipment includes unwinding rollers, pipe making machines, welding machines, cleaning machines, glue injection machines, injection molding machines, which are arranged in sequence along the conveying direction and are sheathed with ultra-thin metal plate coils. A cooling tank, a pulling machine and a pipe cutting machine, the pipe making machine includes a first bending roll and a second bending roll, the first bending roll and the second bending roll are arranged horizontally, and the first bending roll It is arranged up and down with the second bending roller, the outer surface of the first bending roller is provided with a connecting groove, and the connecting groove extends annularly on the outer surface of the first bending roller. The width of the groove is equal to the width of the ultra-thin metal plate, and the two sides of the bottom surface of the connecting groove are respectively provided with bending grooves extending along the length direction of the connecting groove, and the outer surface of the second bending roller is formed with The connecting boss is arranged in a ring shape, and the width of the connecting boss is the same as the width of the connecting groove, which is used to connect and cooperate with the connecting groove up and down. At the same time, the two sides of the top surface of the connecting boss are A bending boss is also formed on the upper part, and when the first bending roller and the second bending roller are connected and matched, the ultra-thin metal plate passes through the gap between the bending groove and the bending boss. In cooperation with the bending boss, the left and right sides of the ultra-thin metal plate are folded downward to form a bending portion.

The beneficial effects of the present invention are as follows: the welding quality of the ultra-thin metal pipe is higher. The connection between the bending groove and the bending boss of the second bending roller is used to fold down the left and right sides of the ultra-thin metal plate to form a bending part, so that the ultra-thin metal plate can be bent through two bending parts. The bonding of the upper part increases the connection area between the two sides of the ultra-thin metal plate, so that the welding area of the ultra-thin metal plate is large when the ultra-thin metal plate is bent and welded, so that the ultra-thin metal plate is welded to form a metal tube and the connection is more stable and the welding quality is higher. Moreover, the present invention makes the water pipe of the present invention have a longer service life by incorporating a metal pipe into the water pipe, and also ensures that the water pipe of the present invention will not pollute the water quality.

Further, the welding machine is a argon arc welding machine.

Further, the bending groove is composed of a first slope, a bottom groove and a second slope, the first slope, the bottom groove and the second slope are connected in sequence from outside to inside, and the first slope, the bottom groove and the second slope are Extending along the length direction of the bending groove, the first slope is inclined downward from the outside to the inside in a straight line, and the second slope is inclined upward from the outside to the inside in an arc shape.

Further, the bending boss is composed of a third slope and a fourth slope, the third slope and the fourth slope are connected in sequence from the outside to the inside, and the third slope and the fourth slope are along the length of the bending boss. The third slope is inclined upward from the outside to the inside and is inclined upward for fitting with the first slope, and the fourth slope is inclined downward from the outside to the inside in an arc and is arranged to be in line with the second slope. Fitting, wherein the intersection between the third slope and the fourth slope is located just below the bottom groove when the connecting groove and the connecting boss are connected. After the above structure is adopted in the present invention, the left and right sides of the ultra-thin metal plate can be folded downward to form a bent portion in cooperation with the bending groove.

Further, the gap between the bending groove and the bending boss is equal to the thickness of the ultra-thin metal plate.

Description of drawings

FIG. 1 is an overall structural diagram of the present invention.

2 is a perspective view of the first bending roll and the second bending roll of the present invention.

3 is a cross-sectional connection diagram of the first bending roll and the second bending roll of the present invention.

4 is a cross-sectional exploded view of the first bending roll and the second bending roll of the present invention.

FIG. 5 is a partial enlarged view of part A in FIG. 4 .

FIG. 6 is a structural diagram of the composite water pipe of the present invention.

FIG. 7 is a partial enlarged view of B in FIG. 6 .

Among them, 1 is the unwinding roller, 2 is the pipe making machine, 21 is the first bending roller, 211 is the connecting groove, 212 is the bending groove, 2121 is the first slope, 2122 is the bottom groove, and 2123 is the second slope , 22 is the second bending roller, 221 is the connecting boss, 222 is the bending boss, 2221 is the third slope, 2222 is the fourth slope, 3 is the welding machine, 4 is the cleaning machine, 5 is the glue injection machine, 6 is the injection molding machine, 7 is the cooling tank, 8 is the pulling machine, 9 is the pipe cutting machine, a1 is the outer layer pipe, a2 is the inner layer pipe, and a21 is the bending part.

Detailed ways

Below in conjunction with specific embodiment, the present invention will be further described:

Referring to Figures 1 to 7, an ultra-thin metal plate welding process includes the following steps:

S1. Bend both sides of the ultra-thin metal plate upwards or downwards to form a bending portion a21 with the same direction on both sides.

S2, bending the above-mentioned ultra-thin metal plate so that the bending parts a21 on both sides are attached.

S3, welding the bent portions a21 on both sides after bonding to form a metal tube.

A composite water pipe comprises an inner pipe a2 and an outer pipe a1 covering the outer surface of the inner pipe a2, the outer pipe a1 is a plastic pipe, and the inner pipe a2 is a metal pipe formed by a welding process of ultra-thin metal plates.

A production equipment for a composite water pipe, comprising an unwinding roller 1, a pipe making machine 2, a welding machine 3, a cleaning machine 4, a glue injection machine 5, and an injection molding machine 6, which are arranged in sequence along the conveying direction , cooling tank 7, tractor 8 and pipe cutting machine 9, the pipe making machine 2 includes a first bending roll 21 and a second bending roll 22, the first bending roll 21 and the second bending roll 22 are arranged horizontally and The first bending roller 21 and the second bending roller 22 are arranged vertically opposite each other. A connecting groove 211 is formed on the outer surface of the first bending roller 21. The connecting groove 211 extends annularly on the outer surface of the first bending roller 21. The groove width of the connecting groove 211 is equal to the width of the ultra-thin metal plate, and two sides of the bottom surface of the connecting groove 211 are respectively provided with bending grooves 212 extending along the length direction of the connecting groove 211. The first slope 2121 , the bottom groove 2122 and the second slope 2123 are formed. The first slope 2121 , the bottom groove 2122 and the second slope 2123 are connected in sequence from outside to inside, and the first slope 2121 , the bottom groove 2122 and the second slope 2123 are folded along the The curved groove 212 extends in the length direction, the first slope 2121 is inclined downward from the outside to the inside, and the second slope 2123 is inclined upward from the outside to the inside in an arc shape; the welding machine 3 is a argon arc welding machine 3 . Wherein, the thickness of the ultra-thin metal plate in this embodiment is less than 0.12 mm.

A connecting boss 221 is formed on the outer surface of the second bending roller 22, and the connecting boss 221 is annularly arranged. At the same time, bending bosses 222 are formed on both sides of the top surface of the connecting boss 221, respectively. When the first bending roller 21 and the second bending roller 22 are connected and matched, the ultra-thin metal plate passes through the bending groove 212 and the folding When the gap between the bosses 222 is bent, the bending groove 212 cooperates with the bending bosses 222 to fold down the left and right sides of the ultra-thin metal plate to form a bending portion a21, wherein the bending bosses 222 are formed by the third The slope 2221 and the fourth slope 2222 are formed. The third slope 2221 and the fourth slope 2222 are connected in sequence from the outside to the inside. The third slope 2221 and the fourth slope 2222 extend along the length of the bending boss 222, and the third slope 2221 extends from the outside to the outside. The inner straight line is inclined upward for fitting with the first slope 2121 , the fourth slope 2222 is inclined downward from the outside to the inner arc and is arranged downward for fitting with the second slope 2123 , wherein the third slope 2221 and the fourth slope 2222 The intersection between them is located just below the bottom groove 2122 when the connecting groove 211 is connected with the connecting boss 221 . The inclination angles of the first slope 2121 and the third slope 2221 are both 45°.

In this embodiment, the gap between the bending groove 212 and the bending boss 222 is equal to the thickness of the ultra-thin metal plate.

The production process of the composite water pipe of the present embodiment is:

S1. Control the unwinding roller 1 to unwind the ultra-thin metal plate coil. After the ultra-thin metal plate enters the pipe making machine 2, the ultra-thin metal plate passes through the gap between the first bending roller 21 and the second bending roller 22 to make the ultra-thin metal plate. The left and right sides are folded down to form the bending part a21, and then the ultra-thin metal plate is made into a tubular structure and output to the welding machine 3; When there is a gap between the bending rollers 22, through the cooperation between the bending groove 212 and the bending boss 222, the left and right sides of the ultra-thin metal plate are folded down to form the bending part a21, and then the tube is made The pipe bending mechanism in the machine 2 bends the left and right side plates of the ultra-thin metal plate upward to form a tubular structure. At this time, the bending parts a21 on the left and right sides of the ultra-thin metal plate are close to each other, which can facilitate subsequent welding.

S2. The welding machine 3 welds the tubular ultra-thin metal plate in step S1 to form a metal tube, and then outputs it to the cleaning machine 4 to clean the welded metal tube; wherein, in the welding machine 3, the left and right sides of the metal plate are cleaned. The attached bent portion a21 is welded to form a metal tube, so compared with the conventional one, the welding area of the metal plate in this embodiment is large and the welding is firm.

S3, output the metal pipe cleaned in step S2 to the glue injection machine 5 to inject glue on the outer surface of the metal pipe, and then output to the injection molding machine 6 to inject the outer surface of the metal pipe to form a water pipe; wherein the glue injection machine 5 is a pair of The metal pipe is glued to facilitate the subsequent injection molding process. In the injection molding machine 6, the injection molding machine 6 injects a layer of plastic on the outer surface of the metal pipe to form a water pipe. Compared with the traditional water pipe, the water pipe of this embodiment is It contains a metal pipe, and the metal pipe is made of stainless steel, so that the water flows from the inside of the metal pipe when passing through the water pipe of this embodiment, and will not be affected by plastic, so as to prevent the pollution of toxic impurities of plastic after using for a period of time. water.

S4. The water pipe formed after injection molding in step S3 is output to the cooling tank 7 for cooling, and then passes through the tractor 8, and then the pipe is cut in the pipe cutting machine 9.

The above-mentioned embodiments are only preferred embodiments of the present invention, and do not limit the present invention in any form. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, can make more possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above, or modify it into equivalent embodiments of equivalent changes . Therefore, without departing from the content of the technical solution of the present invention, the equivalent and equivalent changes made according to the idea of the present invention shall all be covered within the protection scope of the present invention.

Claims (7)

1. The welding process of the ultrathin metal plate is characterized by comprising the following steps of:

s1, bending the two sides of the ultrathin metal plate upwards or downwards to form bending parts (a 21) with the two sides in the same direction;

s2, bending the ultrathin metal plate to make the bending parts (a 21) at the two sides jointed;

and S3, welding the two side bending parts (a 21) after the bonding to form the metal tube.

2. A composite water pipe is characterized in that: the ultra-thin metal plate welding process comprises an inner layer pipe (a 2) and an outer layer pipe (a 1) covering the outer surface of the inner layer pipe (a 2), wherein the outer layer pipe (a 1) is a plastic pipe, and the inner layer pipe (a 2) is a metal pipe formed by the ultra-thin metal plate welding process of claim 1.

3. A production facility for a composite water pipe according to claim 2, characterized in that: the automatic pipe bending machine comprises an unreeling roller (1) which is sequentially arranged along a conveying direction and is sleeved with an ultrathin metal plate winding belt, a pipe making machine (2), a welding machine (3), a cleaning machine (4), a glue injection machine (5), an injection molding machine (6), a cooling tank (7), a traction machine (8) and a pipe cutting machine (9), wherein the pipe making machine (2) comprises a first bending roller (21) and a second bending roller (22), the first bending roller (21) and the second bending roller (22) are arranged in the horizontal direction and are oppositely arranged from top to bottom, a connecting groove (211) is formed in the outer side surface of the first bending roller (21), the connecting groove (211) extends on the outer side surface of the first bending roller (21) in an annular mode, the groove width of the connecting groove (211) is equal to the width of the ultrathin metal plate, and bending grooves (212) extending along the length direction of the connecting groove (211) are formed in two sides of the bottom surface of the connecting groove (211) respectively, the utility model discloses a bending machine, including the second bending roller (22), be formed with on the lateral surface of second bending roller (22) and connect boss (221), connect boss (221) annular setting, the width of this connection boss (221) with the width of coupling groove (211) is the same be used for with coupling groove (211) be connected the cooperation from top to bottom, simultaneously still be formed with respectively on the both sides of coupling boss (221) top surface and bend boss (222), first bending roller (21) is passed through with second bending roller (22) when being connected the cooperation ultra-thin metal sheet bend groove (212) and bend boss (222) cooperate and turn over the left and right sides limit of ultra-thin metal sheet and turn over down and form bending portion (a 21) with bending boss (222) during the clearance between bending groove (212) and the bending boss (222).

4. The production facility of a composite water pipe according to claim 3, characterized in that: the welding machine (3) is an argon arc welding machine (3).

5. The production facility of a composite water pipe according to claim 3, characterized in that: the bending groove (212) is composed of a first slope (2121), a bottom groove (2122) and a second slope (2123), the first slope (2121), the bottom groove (2122) and the second slope (2123) are sequentially connected from outside to inside and arranged, the first slope (2121), the bottom groove (2122) and the second slope (2123) extend along the length direction of the bending groove (212), the first slope (2121) is arranged from outside to inside in straight line in an inclined mode and arranged downwards, and the second slope (2123) is arranged from outside to inside in arc in an inclined mode and arranged upwards.

6. The production equipment of the composite water pipe according to claim 5, wherein: the bending boss (222) is composed of a third slope (2221) and a fourth slope (2222), the third slope (2221) and the fourth slope (2222) are sequentially connected from outside to inside and are arranged, the third slope (2221) and the fourth slope (2222) extend along the length direction of the bending boss (222), the third slope (2221) is arranged from outside to inside in a straight line inclined upward mode and is used for being attached to the first slope (2121), the fourth slope (2222) is arranged from outside to inside in an arc inclined downward mode and is used for being attached to the second slope (2123), and the intersection between the third slope (2221) and the fourth slope (2222) is located right below the bottom groove (2122) when the connecting groove (211) is connected with the connecting boss (221).

7. The production facility of a composite water pipe according to claim 3, characterized in that: and the gap between the bending groove (212) and the bending boss (222) is equal to the thickness of the ultrathin metal plate.

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