KR20100018682A - Formation system of elbow and formation method - Google Patents

Abstract

PURPOSE: An elbow formation system and a formation method thereof are provided to minimize damage to the surface of a product by converting a bending direction upward and prevent damage to the inner diameter by removing chips remaining in the inner diameter. CONSTITUTION: An elbow formation system comprises a upper hoisting feeding clamper(20), a lower hoisting feeding clamper(20'), a feeding cylinder(21), a bending die(B), an upper hoisting fixing clamper(30), a lower hoisting fixing clamper(30'), a cylinder(31), a rotary saw(32), a bending roller(33), a motor(M), a hose feeding roller(40), an injection nozzle(41), an oil hose(H), a tension reel(42), an idle roller(43), an oil recovery container(44), an oil filtering net(45), an elbow discharge hole(46), a ball mandrel(50), a pusher(51), a compression die(52), a main-cylinder(53), a bending cylinder, a rack gear, a pinion gear, a pusher cylinder(57), a swing arm(58), a slider(59), and a bending forming part(A). The pusher cylinder pushes a pusher with the pressure of 100-150 kg/cm^2. A metal pipe material(1) is clamped by the upper hoisting feeding clamper and the lower hoisting feeding clamper.

Description

Forming device and forming method of elbow {Formation system of elbow and formation method}

The present invention is to bend the metal pipes such as copper and stainless steel at various angles to remove the thickness deviation of the inner and outer curvature of the elbow to be bent in forming the elbow and to remove the scratches generated in the inner diameter during molding The present invention relates to an elbow forming apparatus and a method for preventing the inner side of the distal end portion from protruding from the outer side. More specifically, an oil hose is inserted into the inner diameter of the metal pipe material in which the distal end portion is diagonally cut and the oil is sprayed. The chip remaining in the inner diameter is discharged and the ball mandrel is inserted into the tip of the material transferred to the bending position, and the pusher is pressed against the diagonally cut edge of the material, and the pressing die is pressed against the lower edge of the material. Pusher is pushed by hydraulic pressure to bend, and the back end of material can be cut diagonally and discharged for molding. Will.

In general, the elbow is a pipe joint connector used to connect to a position that changes the flow direction of the fluid and gas flowing inside the pipe. A process of bending a pipe material to form a shape of various angles, and expanding both ends of the bent material. It is molded by the process of making and the process of facing both ends which were expanded.

Conventional elbow forming methods are largely classified into a casting method, an extrusion method and a bending method.

The casting method has an advantage of high dimensional accuracy and completeness of the elbow being molded, but there is a disadvantage of mass production and a high manufacturing cost, thereby lowering economic efficiency.

When the elbow formed by the extrusion method is formed at right angles to the radius of curvature of the extrusion die, the inner diameter of the pipe is crushed and the thickness of the outer diameter is reduced, resulting in a high defect rate and a low durability of the elbow.

In addition, the elbow formed by the conventional bending method is guided by the guide rollers 11 and 11 'to the pipe material 1 supplied as shown in FIG. 3 while being bent by the transferers 12 and 12'. The mandrel 15 installed at the tip of the bending die 13 in a fixed state by lowering the clamper 14 installed at the upper end of the bending die 13 and moving it to the inside of the pipe material 1 By inserting into the mandrel (15) is rotated to the bottom to bend the pipe material (1) and cut the rear end of the pipe material (1) with a cutting rotary saw 16 installed inside the bending die (13) Elbows were molded.

The elbow forming method is to supply, bend and cut a plurality of pipe materials to produce elbows, so that the continuity and productivity of the work is improved, but the outer thickness is thinner than the inner thickness when the pipe material is bent. There is a problem such as product failure due to the failure to meet the standard and damage caused by the pressure of fluid and gas flowing inside the elbow.In addition, chips (metal chips) generated during the cutting of pipe materials During bending work, the inside of the material is protruded compared to the outside because it is compressed by the mandrel to the inside diameter of the pipe material by the mandrel. It is troublesome and bent to process the inner and outer circumference through a separate machining process. When discharge of the beam there is a problem such as that may result in damage to the processing elbow to have interference to the bending die.

Therefore, the present invention was created for the purpose of improving the above-mentioned conventional problems, by simultaneously operating the pusher and the crimping die together with the ball mandrel to remove the thickness deviation of the inside and the outside of the bent pipe material, such as KS and JIS standards. As it satisfies the specification, it not only eliminates the elbow defect but also reduces the maintenance cost in use, and inserts the oil hose into the inner diameter of the pipe material to be injected to inject the oil, thereby discharging the chips of metal debris particles generated during the cutting of the pipe. It prevents damage to the inner diameter and performs bending work by cutting the tip of pipe material diagonally, so even after the tension and compression force generated inside and outside the bending part of the material match the edge of the tip, eliminating the post-processing process. The upper and lower sides of the elbow By eliminating interference between the fixed clamper and the bending die, it is possible to provide an elbow forming apparatus and method that can minimize surface damage of the product.

     The elbow forming apparatus of the present invention clamps the metal pipe material with the upper feeding clamper and the lower lifting feeding clamper and moves back and forth with the feeding cylinder to be transferred to the bending die. The fixed clamper, and the rotary saw operated by the cylinder is inclined at the tip of the upper fixed clamper. A bending roller is installed at the tip of the rotary saw and the hose feed roller is rotated by a motor at the inner diameter of the rear end of the metal pipe material. Insert the oil hose equipped with the spray nozzle to the rear end of the cutting position of the metal pipe material, and the rear end of the oil hose is connected to the oil pump through the idle roller which is moved forward and backward by the tension reel, and the oil installed at the bottom of the bending die The oil recovered from the recovery vessel is connected to the oil pump and the bending die A bending molding part consisting of a ball mandrel, a pusher, and a crimping die is installed at the front end, and the bending molding part is moved back and forth by the main cylinder, and the pinion gear is rotated by a lex gear installed on the rod of the bending cylinder. It is installed on the outer periphery so that the pusher cylinder can be moved back and forth.

In addition, the elbow forming method of the present invention is a material transfer step of transferring the metal pipe material to the bending die by the upper feeding clamper and the lower lifting feeding clamper and the feeding cylinder in the feed table, and the transferred metal pipe material in the upper of the bending die A material fixing step of fixing with a fixed clamper and a fixed clamper for lower lifting, and a material for bending the fixed metal pipe material by a main cylinder, a bending cylinder, and a push cylinder in a bending molding part consisting of a ball mandrel, a pusher, and a compression die. A bending step, a material cutting step of diagonally cutting the rear end of the bent metal pipe material with a rotary saw of a bending die, a material discharging step of discharging the bent elbow, and an oil hose inserted into the inner diameter of the metal pipe material Characterized in that it is molded in the inner diameter washing step of washing the inner diameter by spraying oil with a spray nozzle of .

Therefore, in the present invention, the thickness deviation that occurs when the elbow is formed by bending metal pipes such as copper and stainless steel at various angles such as 22.5 degrees, 45 degrees and 90 degrees, that is, the outer thickness of the pipe material is up to 70% of the inner thickness. It is molded to maintain the standard and satisfies the discontinuity of the pipe material due to the tension and compression force applied to the inside and outside of the pipe material during bending work. Oil is injected into the inner diameter to remove chips remaining in the inner diameter to prevent damage to the inner diameter during bending and to rotate the bending direction upward to minimize surface damage that may occur during product discharge. will be.

Hereinafter, the configuration and operation of the present invention will be described in detail with reference to the accompanying drawings.

1,2 is a side and planar conceptual view showing the overall structure of the molding apparatus of the present invention, the feeding operation for transferring the material, the fixing operation for bending, the bending operation for molding, the cutting operation for discharging and washing the inner diameter The washing structure is shown.

In the elbow forming apparatus for forming the elbow by bending and cutting at various angles by feeding the metal pipe material,

The metal pipe material 1 is clamped with the upper feeding clamper 20 and the lower lifting feeding clamper 20 'and moved forward and backward with the feeding cylinder 21 to be transferred to the bending die B, and the transferred metal pipe The material 1 is fixed by the upper fixing clamper 30 and the lower fixing clamper 30 'of the bending die B, and a rotary saw operated by the cylinder 31 at the tip of the upper fixing clamper 30 ( 32 is installed to be inclined, and a bending roller 33 is installed at the front end of the rotary saw 32, and the hose feeding roller 40 is rotated by the motor M at the rear inner diameter of the metal pipe material 1 and sprayed to the front end. Insert the oil hose (H) equipped with the nozzle 41, but advances to the rear end of the cutting position of the metal pipe material (1), and the rear end of the oil hose (H) is moved back and forth by the tension reel (42) In the oil recovery container 44 installed at the bottom of the bending die (B) by connecting to the oil pump (P) via The recovered oil is connected to an oil pump (P), and a bending molding part (A) consisting of a ball mandrel (50), a pusher (51) and a crimping die (52) is installed at the front end of the bending die (B). Part A moves forward and backward by the main cylinder 53 and rotates the pinion gear 56 with the rack gear 55 installed on the rod of the bending cylinder 54. The pusher 51 is a ball mandrel 50. It is installed on the outer periphery of the rear end of the) and is configured to be able to operate back and forth by the push cylinder (57).

The pusher cylinder 57 allows the pusher 51 to be pushed at a pressure of 100-150 kg / cm 2.

The method of forming the elbow is as follows.

A material transfer step of transferring the metal pipe material 1 to the bending die B by the upper feeding clamper 20, the lower lifting feeding clamper 20 ′ and the feeding cylinder 21 from the supply table;

A material fixing step of fixing the transferred metal pipe material 1 to the upper fixing clamper 30 and the lower lifting fixing clamper 30 'in the bending die B;

The fixed metal pipe material 1 has a main cylinder 53, a bending cylinder 54, and a pusher cylinder in a bending forming portion A formed of a ball mandrel 50, a pusher 51 and a crimping die 52. A material bending step of bending by 57;

A material cutting step of diagonally cutting the rear end of the bent metal pipe material 1 with the rotary saw 32 of the bending die B;

A material discharging step of discharging the bent elbow;

The inner diameter of the metal pipe material 1 is molded into the inner diameter washing step of washing the inner diameter by spraying oil into the injection nozzle 41 of the oil hose (H) inserted into the inner diameter.

In the drawing, reference numeral 58 is a swing arm, 59 is a slider, 45 is an oil filtration net, and 46 is an elbow discharge hole.

In the present invention as described above, the bending and thickness of the inner and outer sides of the bending portion generated when bending the metal pipe material to form the elbow conforms to the standard specification, and the tension and compression force applied to the inner and outer peripheral edges of the material during molding It is manufactured by matching the discontinuity of the material by the oil. The oil is sprayed into the inner diameter of the material to remove chips to prevent the inner diameter of the material from being damaged and the bending direction of the material is adjusted upward. It is to provide an elbow forming apparatus and method that not only eliminates interference, but also prevents damage to the surface of the elbow.

As shown in FIGS. 1 and 2, the elbow molding according to the present invention is carried out by forming the material through a process of material transfer step, small stocking step, material bending step, material cutting step, material discharge step and inner diameter washing step. In the transfer step, the metal pipe material (1) of which the tip is cut diagonally from the material feeder is placed in the supply line with the guide roller installed, and the tip is positioned at the bottom of the upper feeding clamper (20). Relatively raises the material 1 and simultaneously moves the feeding cylinder 21 to transfer the material 1 to the bending position.

When the transfer of the raw material 1 is completed, the lower lifting feeding clamper 20 'is lowered and then reverses the feeding cylinder 21 to wait for the next operation.

The transported material 1 is a material for clamping and fixing the material 1 by raising the lower lifting clamper 30 'installed at the lower end of the upper fixing clamper 30 installed in the bending die B for the bending work. Carry out the process of the fixing step.

When the material 1 is fixed as described above, the main cylinder 53 installed on the swing arm 58 is operated in the bending molding part A to be mounted on the slider 59 by the material bending process for bending the material 1. The ball mendrel 50, the pusher 51 and the pressing die 53 are advanced, wherein the ball mendrel 50 is inserted into the inner periphery cut by the oblique line of the fixed material 1 and the ball mendrel 50 The pusher 51 installed at the rear end of the outer periphery) is in close contact with the periphery cut by the oblique line of the raw material 1, and the pressing die 53 is in close contact with the lower end of the raw material 1.

After the bending molding part A moves forward, the pinion gear 56 connected to one side of the swing arm 58 is rotated by the bending gear 55 installed on the rod by the operation of the bending cylinder 54 so that the bending die B is rotated. The bending roller 33 installed in the shaft is bent to the shaft, and at this time, the pusher cylinder 57 advances the pusher 51 at a pressure of 100-150kg / cm 2 to squeeze the periphery cut by the diagonal line of the material 1 and simultaneously compresses it. The die 52 is to bend while supporting the bent portion of the material (1).

As described above, when the material 1 is bent, the tensile force applied to the outside of the material 1 to be bent is pushed by the pusher 51 at the leading edge and rotated while being supported by the crimping die 52 so that the thickness of the outside is less than the standard specification. It can be bent while preventing thinning.

When the bending of the material (1) is completed by the rotary saw 32 by the operation of the cylinder 31 installed inclined between the bending roller 33 and the upper fixing clamper 30 of the bending die (B) in the material cutting step. The rear end of the bent material 1 is cut.

 The cut material 1 is discharged through the elbow discharge hole 46 by the main cylinder 53 is reversed to the oil recovery container 44 in the material discharge step and the bending molding portion (A) is a bending cylinder (54) ) And the pusher cylinder 57 is reversed to wait for the next process.

When the material (1) is discharged, the hose feeding roller (40) operated by the motor (M) to the inner diameter of the rear end of the material (1) oil hose (H) equipped with the injection nozzle 41 at the tip in the material inner diameter washing step Is inserted by

At this time, the injection nozzle 41 is advanced to the rear end of the cutting position of the material (1) to spray the oil by the operation of the oil pump (P) to discharge the chip of the metal chips particles remaining in the inner diameter of the material oil recovery container 44 ) And the oil recovered in the oil recovery container 44 is configured to remove chips and foreign substances from the oil filtration network 45 and to circulate the oil pump (P). The oil hose (H) is connected to the motor (M). Reverse rotation to insert and retrieve the hose feeding roller 40 to the inner diameter of the material (1) to adjust the oil hose (H) by advancing the idle roller (43) back and forth by the tension reel (42).

 The washing of the inner diameter of the material may be performed by changing to a post-process of the material transferring step.

The elbow is molded through the above steps, and the subsequent bending operation is to continuously mold the elbow by the same operation method as the above step.

The present invention is not limited to the above-mentioned specific preferred embodiments, and various modifications can be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims. Of course, such changes are intended to fall within the scope of the claims.

1 is a conceptual view showing a side structure showing the overall structure of the molding apparatus of the present invention;

Figure 2 is a schematic plan view showing the overall structure of the molding apparatus of the present invention

3 is a conceptual view of the overall structure of a conventional molding apparatus

<Description of the symbols for the main parts of the drawings>

1: metal pipe material 20,20 ': feeding clamper

21: Feeding cylinder 30,30 ': Fixed clamper

31: blade cylinder 32: rotary saw

33: Bending roller 40: Hose feeding roller

41: injection nozzle 42: tension reel

43: idler roller 44: oil recovery container

50: ball mendrill 51: pusher

52: Abchadai 53: Main cylinder

54: bending cylinder 55: rack gear

56: pinion gear 57: pusher cylinder

A: bending die B: bending die

H: Oil hose M: Motor

P: Oil Pump

Claims (3)

In the elbow forming apparatus for forming the elbow by bending and cutting at various angles by feeding the metal pipe material, The metal pipe material 1 is clamped with the upper feeding clamper 20 and the lower lifting feeding clamper 20 'and moved forward and backward with the feeding cylinder 21 to be transferred to the bending die B, and the transferred metal pipe material 1 is a rotary saw 32 which is fixed by the upper fixed clamper 30 and the lower fixed clamper 30 'of the bending die B and operated by the cylinder 31 at the tip of the upper fixed clamper 30. ) Is installed obliquely and a bending roller 33 is installed at the front end of the rotary saw 32 and rotates the hose feeding roller 40 with the motor M at the inner diameter of the rear end of the metal pipe material 1 to the injection nozzle at the front end. Insert the oil hose (H) (41) is mounted, but advancing to the rear end of the cutting position of the metal pipe material (1), the rear end of the oil hose (H) is moved back and forth by the tension reel (42) Connect to the oil pump (P) via the oil recovery vessel 44 installed at the bottom of the bending die (B) The received oil is connected to the oil pump (P), and a bending molding part (A) consisting of a ball mandrel (50), a pusher (51) and a pressing die (52) is installed at the front end of the bending die (B), but the bending molding part (A) is moved back and forth by the main cylinder (53) and rotates the pinion gear (56) with the rake gear (55) installed on the rod of the bending cylinder (54), the pusher (51) ball mandrel (50) The elbow forming apparatus, characterized in that the rear end of the outer periphery of the pusher cylinder (57) to be able to operate forward and backward. The method of claim 1, The pusher cylinder 57 is an elbow forming apparatus, characterized in that to push the pusher 51 at a pressure of 100-150kg / ㎠. A material transfer step of transferring the metal pipe material 1 to the bending die B by the upper feeding clamper 20, the lower lifting feeding clamper 20 ′ and the feeding cylinder 21 from the supply table; A material fixing step of fixing the transferred metal pipe material 1 to the upper fixing clamper 30 and the lower lifting fixing clamper 30 'in the bending die B; The fixed metal pipe material 1 has a main cylinder 53, a bending cylinder 54, and a pusher cylinder in a bending forming portion A formed of a ball mandrel 50, a pusher 51 and a crimping die 52. A material bending step of bending by 57; A material cutting step of diagonally cutting the rear end of the bent metal pipe material 1 with the rotary saw 32 of the bending die B; A material discharging step of discharging the bent elbow; Molding method of the elbow, characterized in that formed in the inner diameter washing step of washing the inner diameter by spraying oil into the injection nozzle 41 of the oil hose (H) inserted into the inner diameter of the metal pipe material (1).

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