KR102572463B1 - Automatic elbow manufacturing apparatus - Google Patents

Abstract

The present invention relates to an automatic elbow forming device, which supplies a pipe-shaped material cut to a certain length through a material pressing unit to a material heating unit provided with a high-frequency induction heating coil, and at the same time supplies the heated pipe-shaped material to the left end of the transfer guide rod A series of elbow forming processes in which the diameter of the pipe-shaped material is enlarged and bent into an elbow shape can be automatically performed by pressing and moving toward the molding jig.
The present invention for achieving the above object, the material supply unit for supplying the pipe-shaped material to the transfer guide rod provided on the top of the work table 160; a material transfer unit provided on the upper left side of the material supply unit of the work table and transferring the pipe-shaped material input to the right side of the transfer guide bar to the pressing position on the left side of the transfer guide bar; A material pressing unit provided at the upper right side of the work table and pressing and moving the pipe-shaped material transferred to the pressing position on the left side of the transfer guide rod through the material transfer unit toward the molding jig installed at the left end of the transfer guide rod; A material heating unit provided at the left side of the top of the work table and heating the pipe-shaped material that is pressed and moved toward the molding jig through the material pressing unit; provided at the left end of the top of the work table, while passing through the molding jig. It is characterized in terms of technical configuration by further comprising; a correction unit for correcting the deformation of the pipe-shaped material forming process that is bent into an elbow shape.

Description

Automatic elbow forming device {AUTOMATIC ELBOW MANUFACTURING APPARATUS}

The present invention relates to an automatic elbow forming device, and more particularly, to supply a pipe-shaped material cut to a certain length through a material pressing unit to a material heating unit provided with a high-frequency induction heating coil, and at the same time supply the heated pipe-shaped material to the left side of the transfer guide rod. It relates to a series of elbow forming processes in which the diameter of a pipe-like material is enlarged while bending and forming into an elbow shape by moving the pressure toward a forming jig provided at a stage.

In general, in a transfer pipe that transfers a fluid such as water, oil, or gas, the transfer direction of the fluid is often changed through various connecting pipes.

The present invention molds an elbow that allows the fluid transfer direction to be changed by 90°, such as converting a fluid transferred in a vertical direction among the connecting pipes to a horizontal direction or converting a fluid transferred in a horizontal direction to a vertical direction. It relates to an elbow forming device that enables

The elbow forming apparatus has been proposed and used in various forms such as a casting method, a bending method, and an extrusion method. It relates to an elbow forming device of a bending extrusion method.

In Patent Document 1 below, a frame is installed long in front and back, a curved portion is formed so that the diameter gradually increases as it goes forward, and a straight line portion having a smaller diameter than the diameter of the front end surface of the curved portion from the curved portion to the rear is formed, and the curved portion is formed. An elbow forming rod installed at the upper part of the frame so that it protrudes forward of the frame, a material supply unit installed at the rear of the frame, and continuously supplying the elbow forming material by pushing the elbow forming material to a mill plate so as to be inserted into the rear end of the straight part of the elbow forming rod, and the upper part of the frame A pusher that is installed to be movable back and forth, presses and moves the elbow molding material inserted into the straight part of the elbow forming rod to the curved part of the elbow forming rod, and a first installed in front of the frame to surround the straight part meeting the curved part of the elbow forming rod. Disclosed is an elbow expansion forming apparatus comprising a high frequency induction heating coil and a second high frequency induction heating coil rotatably installed along the radius of curvature of the curved portion of the elbow forming rod so as to surround the curved portion of the elbow forming rod.

Korean Registered Patent Publication No. 10-1328868 (registered on November 06, 2013)

In the prior art elbow forming apparatus of the heat-expanding extrusion method, since the pipe-shaped material is heated through a burner using oil or gas as a raw material, the working environment is very poor due to dust and heat, and the work is inconvenient. there was.

In addition, since the heat-expanding extrusion type elbow forming apparatus according to the prior art expands the pipe-shaped material into an elliptical shape to facilitate extraction from the molding jig and then corrects it into a circular shape through a separate correction means, a lot of work time and manpower are required. There was a problem that not only productivity fell but also cost increased.

The present invention is to solve the problems of the elbow molding apparatus of the heat-expanding extrusion method according to the prior art, and its purpose is to improve the working environment by efficiently heating the pipe-shaped material through a high-frequency induction heating means. It is to provide an automatic elbow molding device that allows.

Another object of the present invention is to prevent a pipe-shaped material bent into an elbow shape from being deformed into an elliptical shape by forming pressure in the process of pipe expansion through a forming jig, thereby providing additional corrective work after forming the elbow. It is to provide an automatic elbow forming device that can form an elbow in a more precise form without going through, thereby improving productivity and reducing costs.

In order to achieve the above object, the automatic elbow forming apparatus according to the present invention is provided on the upper right side of the work table, the material supply unit for supplying the pipe-shaped material to the transfer guide rod provided on the top of the work table; a material transfer unit provided on the upper left side of the material supply unit of the work table and transferring the pipe-shaped material input to the right side of the transfer guide bar to the pressing position on the left side of the transfer guide bar; A material pressing unit provided at the upper right side of the work table and pressing and moving the pipe-shaped material transferred to the pressing position on the left side of the transfer guide rod through the material transfer unit toward the molding jig installed at the left end of the transfer guide rod; A material heating unit provided at the left side of the top of the work table and heating the pipe-shaped material that is pressed and moved toward the molding jig through the material pressing unit; provided at the left end of the top of the work table, while passing through the molding jig. It is characterized in that it further includes; a correction unit for correcting the deformation of the forming process of the pipe-shaped material that is bent and molded into an elbow shape.

In the automatic elbow forming apparatus according to the present invention, the correction unit includes a fixed frame installed at the upper left end of the work table; Calibration cylinder fixed to the fixed frame; A movable frame installed on the right side of the fixed frame at the top of the work table to be transportable in left and right directions and connected to the operating rod of the calibration cylinder protruding to the right side of the fixed frame; A first correction roller installed on the upper right side of the moving frame; It is characterized in that it includes; a second correction roller installed on the lower right side of the moving frame.

In the automatic elbow forming apparatus according to the present invention, the material conveying unit includes a guide rail installed on the upper right side of the work table; A transport bar installed to be transportable in the left and right directions on the guide rail; A transfer member installed at the lower end of the transfer bar to rotate in a clockwise direction and limited to rotate in a counterclockwise direction, wherein the lower end of the transfer member has an arc-shaped concave shape corresponding to the transfer guide rod. characterized by

In the automatic elbow forming apparatus according to the present invention, a first fixing block and a second fixing block are installed on the right and left sides of the material conveying unit 120 at the top of the work table, and the transfer guide rod passes in the left and right directions at the top center of each fixed block. It is characterized in that a space is provided, and a fixed shutter is installed to be able to open and close on the right side of the second fixing block to fix the transfer guide rod during the closing operation and at the same time to limit the transfer of the pipe-shaped material in the left direction.

In the automatic elbow molding apparatus according to the present invention, the material pressing unit; A pressure cylinder that is installed between the first fixed block and the second fixed block; A pressure block installed to be movable in the left and right directions on the left side of the second fixing block at the top of the work table and connected to the operating rod of the pressure cylinder protruding to the left of the second fixing block; including, the upper center of the pressure block A space for passing the transfer guide rod in the left and right directions is provided, and a pressure shutter contacting the transfer guide rod during a closing operation is installed on the left side of the pressure block to be able to open and close in the forward and backward directions.

In the automatic elbow molding apparatus according to the present invention, the material heating unit includes a fixing bracket installed at the front and rear of the top of the work table; A casing in which rotation angle adjustment is freely installed in the left and right directions between a pair of fixing brackets; A high-frequency induction heating coil is installed inside the casing and heats the pipe material moving toward the molding jig.

According to the automatic elbow forming device of the present invention, processes such as supply and transfer of pipe-shaped material, heating, pipe expansion, bending, and straightening are performed by a non-stop one-line automation system without any subsequent processes, thereby improving workability and productivity for elbow forming. It is possible to efficiently heat the pipe-type material through the high-frequency induction heating coil of the material heating part, so it is possible to improve the conditions at the work site (site air quality and risk reduction).

In addition, according to the automatic elbow forming apparatus according to the present invention, when the pipe-shaped material is expanded and bent into an elbow shape through a molding jig, the outer circumference of the pipe-shaped material is pressed by the first and second straightening rollers of the correction unit Since deformation that may occur during the molding process can be suppressed or corrected, it is possible to form an elbow in a precise shape and dimension without a separate additional correction process, securing quality stability, cost reduction and competitive advantage due to a reduction in the defective rate. will be provided

In addition, by shortening the elbow molding cycle time, productivity is improved and the expected effect of increasing sales can be obtained, and the defect rate of the existing process is significantly reduced due to the stability of high-frequency heating, as well as labor cost reduction due to omission of the calibration process, correction equipment and Management costs are drastically reduced, and fuel costs and carbon emissions can be reduced by replacing the use of refined oil for oil heating with electricity, high frequency.

1 and 2 are perspective views of an automatic elbow molding apparatus according to the present invention;
3 is a plan view of an automatic elbow forming apparatus according to the present invention;
Figures 4a and 4b is a front view showing the main part of the material supply state of the automatic elbow molding apparatus according to the present invention,
5a and 5b are front views of main parts showing the material transfer state of the automatic elbow molding apparatus according to the present invention;
6a and 6b are front views of main parts showing the material pressure state of the automatic elbow molding apparatus according to the present invention;
Figure 7 is a front view of the main part of the material molding state of the automatic elbow molding device according to the present invention.
8 is an enlarged perspective view of a correction unit according to an embodiment of the present invention.

Hereinafter, an automatic elbow forming apparatus according to the present invention will be described in detail based on the accompanying drawings. For reference, the size of components, the thickness of lines, etc. shown in the drawings referred to in describing the present invention may be somewhat exaggerated for convenience of understanding.

In addition, the terms used in the description of the present invention are defined in consideration of the functions in the present invention, and may vary depending on the user, operator's intention, convention, and the like. Therefore, the definition of this term deserves to be made based on the contents throughout this specification.

And in this application, terms such as 'include' and 'have' refer to the existence of a specific number, step, operation, component, part, or combination thereof described in the specification, but one or more other It should be understood that the presence or addition of features, numbers, steps, operations, components, parts, or combinations thereof is not precluded.

In addition, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and only this embodiment makes the disclosure of the present invention complete, and the scope of the invention to those skilled in the art. It is provided for complete information.

Therefore, since the present invention can have various changes and various forms, implementation examples (態樣, aspects) (or embodiments) will be described in detail in the specification. However, this is not intended to limit the present invention to a specific disclosed form, and it should be understood to include all changes, equivalents, and substitutes included in the technical spirit of the present invention, and the singular expression used in this specification is clearly different from the context. Include plural expressions unless otherwise indicated.

However, in describing the present invention, detailed descriptions of known or known functions or configurations will be omitted to clarify the gist of the present invention.

Hereinafter, "upward", "downward", "front" and "rearward" and other directional terms are defined based on the state shown in the drawings.

1 and 2 are perspective views of an automatic elbow forming apparatus according to the present invention, and FIG. 3 is a plan view of the automatic elbow forming apparatus according to the present invention.

The automatic elbow forming apparatus 100 according to the present invention includes a material supply unit 110, a material transfer unit 120, a material pressing unit 130, a material heating unit 140, and a correction unit 150.

The material supply unit 110 is a part that supplies a pipe-shaped material P of a certain length to the transfer guide rod 170 provided on the upper part of the work table 160, and is provided on the upper right side of the work table 160.

The material supply unit 110 is a feeder unit 111 that inputs the pipe-type material P one by one into the loading space, and pushes the right end of the pipe-type material P injected into the loading space to the right side of the transfer guide rod 170. It includes a supply unit 112 to.

Since the technical configuration of the feeder unit 111 including the stopper of the material supply unit 110 and the supply unit 112 including the left and right transfer cylinders is obvious in the art to which the present invention belongs, a detailed description thereof will be omitted.

The material transfer unit 120 is a part that transfers the pipe-shaped material (P) injected on the right side of the transfer guide rod 170 toward the material pressing unit 130, and is located on the upper left side of the material supply unit 110 of the work table 160. provided

The material transfer unit 120 includes a guide rail 121 installed on the upper right side of the work table 160; A transport bar 122 installed to be transportable in the left and right directions on the guide rail 121; A transfer member 123 installed at the lower end of the transfer bar 122 to rotate in a clockwise direction and to limit rotation in a counterclockwise direction at the same time.

The transfer member 123 has a lower end concave in an arc shape corresponding to the transfer guide bar 170.

Therefore, when the pipe-shaped material (P) in the loading space is input from the right end of the transfer guide rod 170 to the left through the material supply unit 110, the lower end of the transfer member 123 rotates clockwise to the left upper part. As it is, the pipe-shaped material (P) can be moved to the left side of the conveying member (123).

In the illustrated embodiment, the transfer bar 122 of the material transfer unit 120 is fixed to a transfer wire 125 installed on a pair of rotation pulleys 124 installed on both sides of the guide rail 121, and one rotation pulley It has a form in which it is transferred in the left and right directions by forward and reverse rotation of the rotation motor 126 connected to 124.

A first fixing block 127 and a second fixing block 128 are installed on the right and left sides of the material transfer unit 120 at the top of the work table 160, and the left and right sides are located at the center of the top of each fixing block 127, 128. A space for passing the transfer guide rod is provided in the direction.

At the front and rear of the right side of the second fixing block 128 installed on the left side of the material transfer unit 120 at the top of the work table 160, the transfer guide rod 170 is fixed during the closing operation and at the same time the pipe-shaped material P A fixed shutter 129 limiting leftward movement of is installed to be able to open and close.

Therefore, when the fixed shutter 129 is operated to close, the transfer guide rod 170 is fixed, and the pipe-shaped material P injected to the right of the second fixing block 128 of the transfer guide rod 170 is transferred to the second fixing block ( 128) cannot be moved to the left.

The material pressing unit 130 moves the pipe-shaped material P transferred to the left side of the transfer guide bar 170 through the material transfer unit 120 toward the molding jig 180 installed at the left end of the transfer guide bar 170. As a part for pressing and moving, it is provided on the upper right side of the work table 160.

The material pressing unit 130 includes a pressing cylinder 131 installed between the first fixing block 127 and the second fixing block 128; It is movably installed on the left side of the second fixing block 128 at the top of the work table 160 and connected to the operating rod of the pressure cylinder 131 protruding to the left of the second fixing block 128. Includes; press block 132.

Like the aforementioned fixing blocks 127 and 128, the pressure block 132 has a space for passing the transfer guide rods in the left and right directions at the center of the top, and transfers during closing operation at the front and rear of the left side of the pressure block 132. A pressure shutter 133 in contact with the guide rod 170 is installed to be able to open and close in the forward and backward directions.

The material heating unit 140 is a part that heats the pipe-shaped material P, which is pressed and moved toward the molding jig 180 through the material pressing unit 130, to a certain temperature (for example, 900 ° C to 1000 ° C). It is provided on the left side of the top of the table 160.

The material heating unit 140 includes a fixing bracket 141 installed at the top front and top rear of the work table 160; A casing 142 whose rotation angle can be freely adjusted in the left and right directions by a forward and reverse drive motor (not shown) and a meshing gear module (reference numerals omitted) between a pair of fixing brackets 141; A high-frequency induction heating coil 143 for heating the pipe material P moving toward the molding jig 180 but located inside the casing 142 to a temperature range suitable for thermal deformation; includes.

The correction unit 150 of the illustrated embodiment is a part that corrects the deformation of the molding process of the pipe-shaped material P, which is bent and molded into an elbow shape while passing through the molding jig 180, at the left end of the top of the work table 160. are provided in

The calibration unit 150 includes a fixed frame 151 installed at the upper left end of the work table 160 as shown in FIG. 8; A calibration cylinder 152 fixed to the fixed frame 151; A moving frame 153 installed on the right side of the fixed frame 151 at the top of the work table 160 to be transportable in the left and right directions and connected to the operating rod of the calibration cylinder 152 protruding to the right side of the fixed frame 151 ; A first correction roller 154 installed on the upper right side of the moving frame 153; A second correction roller 155 installed on the lower right side of the moving frame 153; includes.

The first correction roller 154 of the correction unit 150 is provided on the left side of the molding jig 180 and contacts the outer circumference of the pipe-shaped material P bent in an elbow shape during the elbow forming process, and the second correction roller 155 ) is provided at the bottom of the molding jig 180 and bent into an elbow shape through the molding jig 180 and then comes into contact with the outer circumference of the pipe-shaped material P drawn out of the molding jig 180.

Among the reference numerals, reference numerals 191 and 192 denote transfer guide rod support units.

In the automatic elbow forming apparatus 100 according to the present invention, the pipe-shaped material P is introduced to the right side of the transfer guide rod 170 through the material supply unit 110, and the pipe inserted into the right side of the transfer guide rod 170 The shaped material (P) is transferred to the press position on the left side of the transfer guide rod 170 through the material transfer unit 120, and the pipe-shaped material (P) transferred to the press position is transferred through the material press unit 130 to the transfer guide bar While being transferred to the forming jig 180 provided at the left end of the 170, it is heated through the material heating unit 140, and the heated pipe-shaped material P passes through the forming jig 180 while being bent into an elbow shape and expanding the tube. It is molded, and the pipe-shaped material P is corrected to have an accurate shape and dimension through the correction unit 150 during the elbow forming process and the discharge process by the molding jig 180, so that quality stability can be secured.

The following description is to examine the operation process of the automatic elbow forming apparatus 100 according to the present invention in more detail, and FIGS. 4A and 4B are front views of main parts showing the material supply state of the automatic elbow forming apparatus according to the present invention.

First, the feeder unit 111 of the material supply unit 110 provided at the upper right of the work table 160 inputs the pipe-shaped material P one by one into the loading space as shown in FIG. 4A, and the supply unit 112 is shown in FIG. As described above, the pipe-shaped material (P) injected into the loading space is pushed to the left and inserted into the right side of the transfer guide rod 170.

In the above, when the supply unit 112 inserts the pipe-shaped material P into the transfer guide rod 170, the lower end of the transfer member 123 rotates clockwise to the upper left as shown in FIG. 4B, and the pipe-shaped material ( P) is able to move to the left side of the transfer member 123.

The input of the pipe-shaped material P by the material supply unit 110 is carried out on the transfer guide rod 170 between the second fixing block 128 with the fixed shutter 129 closed and the transfer member 123 on its right side. It proceeds until no more pipe-shaped material (P) can be inserted.

5a and 5b are front views showing the main part of the material transfer state of the automatic elbow molding apparatus according to the present invention.

As shown in FIG. 5A, when the supply of the pipe-shaped material P is completed to the right side of the transfer guide rod 170, the fixed shutter 129 of the second fixing block 128 and the press shutter 133 of the press block 132 is operated to open, and the transfer bar 122 of the material transfer unit 120 and the transfer member 123 at the lower end are transferred in the left direction, and the pipe-shaped material P on the right side of the second fixing block 128 as shown in FIG. 5B ) is transferred to the pressing position on the left side of the pressing block 132.

Then, as shown in FIG. 5B, after the pipe-shaped material (P) inserted into the right side of the transfer guide rod 170 is moved to the pressing position on the left side of the transfer guide rod 170, the transfer bar 122 of the material transfer unit 120 ) and the transfer member 123 are transported in the right direction to return to the original position on the right side of the first fixing block 127, and press the fixing shutter 129 of the second fixing block 128 and the pressing block 132 The shutter 133 is operated to close.

6a and 6b are front views showing the main part of the material pressing state of the automatic elbow molding apparatus according to the present invention.

Next, as shown in FIG. 6A, the calibration cylinder 152 of the calibration unit 150 is extended and operated, and accordingly, the moving frame 153 and the first calibration roller 154 and the second calibration roller 155 installed on the right side thereof is moved toward the molding jig 180.

Next, as shown in FIG. 6B, the pressure cylinder 131 of the material pressure unit 130 extends, and accordingly, the pressure block 132 moving to the left moves the pipe-shaped material P at the pressure position to the molding jig 180. ) will be moved towards

7 is a front view of the main part of the material forming state of the automatic elbow forming apparatus according to the present invention.

The pipe-shaped material (P) moved toward the molding jig 180 by the extension operation of the pressure cylinder 131 passes through the material heating unit 140 in order from the left side to a certain temperature (for example, 900 ℃ ~ 1000 ℃) After being heated, it is expanded and molded into an elbow shape while passing through the molding jig 180 as shown in FIG.

The pipe-shaped material (P) whose diameter is enlarged while passing through the molding jig 180 in the automatic elbow molding process, has its outer periphery as shown in FIG. It is in contact with the straightening roller 154, and after passing through the molding jig 180, its outer periphery is in contact with the second straightening roller 155 so that it can be molded into an accurate circular shape without being deformed into an oval shape by the molding pressure.

As described above, the automatic elbow forming apparatus 100 according to the present invention forms the first straightening roller 154 of the straightening unit 150 in contact with the outer circumference of the pipe-shaped material P when forming the elbow shape through the forming jig 180 And since it is possible to suppress or correct the deformation that may occur in the molding process through the second correction roller 155, there is no need to perform a separate correction work after completing the elbow molding, so the productivity of the application is dramatically improved.

On the other hand, in the material supply unit 110, the transfer bar 122 and the transfer member 123 of the material transfer unit 120 transfer the pipe-shaped material P to the pressing position and return to the original position, and the second fixation in the open state. When the fixed shutter 129 of the block 128 and the pressure shutter 133 of the pressure block 132 are closed again, the pipe-shaped material P is transported through the feeder unit 111 and the supply unit 112 again. It is inserted to the right of (170).

And after the pressure cylinder 131 of the material pressure unit 130 that presses and moves the pipe-shaped material P toward the molding jig 180 is extended to the maximum stroke distance, the elbow molding is temporarily stopped and the pressure cylinder 131 is compressed and the pressing block 132 transferred toward the material heating unit 140 returns to its original position on the left side of the second fixing block 128.

In addition, after the pressure block 132 returns to its original position due to the compression operation of the pressure cylinder 131, the correction cylinder 152 of the correction unit 150 is compressed and moved toward the molding jig 180. The moving frame ( 153) and the first straightening roller 154 and the second straightening roller 155 are returned to their original positions on the upper left side of the work table 160.

The automatic elbow forming apparatus 100 according to the present invention heats the pipe-shaped material P through the high-frequency induction heating coil 143 of the material heating unit 140, so there is no dust generation at the work site, and work at the work site conditions can be improved.

In addition, the automatic elbow forming apparatus 100 according to the present invention performs the first correction roller 154 and the second correction of the correction unit 150 when the pipe-shaped material P is expanded and bent into an elbow shape through a forming jig. It is possible to correct the pipe-shaped material P into an accurate elbow shape with the roller 155, so that the elbow can be formed in a precise shape and dimension without an additional correction means or an additional correction process.

Although the invention made by the present inventors has been specifically described according to the above embodiments, the present invention is not limited to the above embodiments and can be changed in various ways without departing from the gist of the invention.

100: elbow automatic molding device, 110: material supply unit,
111: feeder unit, 112: supply unit,
120: material transfer unit, 122: transfer bar,
127: first fixed block, 128: second fixed block,
130: material pressing unit, 132: pressing block,
140: material heating unit, 141: fixing bracket,
143: high frequency induction heating coil, 150: correction unit
153: moving frame, 154: first correction roller,
155: second correction roller, 160: work table,
170: transfer guide rod, 180: molding jig

Claims (6)

A material supply unit 110 provided on the upper right side of the work table 160 and supplying the pipe-shaped material P to the transfer guide rod 170 provided on the top of the work table 160; A material transfer unit provided on the upper left side of the material supply unit 110 of the work table 160 and transferring the pipe-shaped material P input to the right side of the transfer guide bar 170 to the pressing position on the left side of the transfer guide bar 170. (120); It is provided on the upper right side of the work table 160, and the pipe-shaped material (P) transferred to the pressing position on the left side of the transfer guide rod 170 through the material transfer unit 120 is transferred to the center of the transfer guide rod 170. A material pressing unit 130 for pressing and moving toward the molding jig 180 installed at the left end; A material heating unit 140 provided on the left side of the top of the work table 160 and heating the pipe-shaped material P that is pressed and moved toward the molding jig 180 through the material pressing unit 130; and , Correction unit 150 provided at the left end of the top of the work table 160 and correcting deformation in the molding process of the pipe-shaped material P, which is bent and molded into an elbow shape while passing through the molding jig 180. In the elbow automatic molding device,
The correction unit 150 includes a fixed frame 151 installed at the upper left end of the work table 160; A calibration cylinder 152 fixed to the fixed frame 151; A moving frame 153 installed on the right side of the fixed frame 151 at the top of the work table 160 to be transportable in the left and right directions and connected to the operating rod of the calibration cylinder 152 protruding to the right side of the fixed frame 151 ; A first correction roller 154 installed on the upper right side of the moving frame 153; An automatic elbow forming apparatus comprising a; second correcting roller 155 installed on the lower right side of the moving frame 153.
According to claim 1,
The material transfer unit 120 includes a guide rail 121 installed on the upper right side of the work table 160; A transport bar 122 installed to be transportable in the left and right directions on the guide rail 121; A transfer member 123 installed at the lower end of the transfer bar 122 so as to be rotatable in a clockwise direction and limited to rotate in a counterclockwise direction; including, and the lower end of the transfer member 123 is a transfer guide rod ( 170) and an automatic elbow molding apparatus characterized in that it has a concave shape in an arc shape corresponding to.
According to claim 1,
The first fixing block 127 and the second fixing block 128 are installed on the right and left sides of the material transfer unit 120 at the top of the work table 160, and the left and right sides of the top center of each fixing block 127 and 128 A fixed shutter that has a space for passing the transfer guide bar in the direction and fixes the transfer guide bar 170 at the time of closing operation on the right side of the second fixing block 128 and at the same time restricts the transfer of the pipe-shaped material P in the left direction. (129) is an automatic elbow molding apparatus, characterized in that installed to be openable.
According to claim 3,
The material pressing unit 130 includes a pressing cylinder 131 installed between the first fixing block 127 and the second fixing block 128; It is movably installed on the left side of the second fixing block 128 at the top of the work table 160 and connected to the operating rod of the pressure cylinder 131 protruding to the left of the second fixing block 128. A press block 132; includes, a space for passing the transfer guide rods in the left and right directions is provided at the center of the upper end of the press block 132, and the transfer guide bar 170 when the closing operation is performed on the left side of the press block 132 An automatic elbow molding apparatus, characterized in that the pressurized shutter 133 in contact with is installed to be able to open and close in the forward and backward directions.
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