JPH01317626A - Method and device for forming elbow - Google Patents

Abstract

PURPOSE:To easily form an elbow by bending a short blank pipe by forming an round-shape slant face and a leading face on the end faces before and behind the blank pipe, and allowing the blank pipe to advance by pressure into a gap of arc-like female die and male die superposed by providing the gap. CONSTITUTION:Slant faces 2, 3 are formed like a round-shape on the front end face and the rear end face of an elbow forming blank pipe 1 and the leading face 2' is formed on the slant face 2. At the time of forming an elbow, a feeding base 5 is advanced, the blank pipe 1 is inserted into a hole 6 of its head 9, and pushed into a gap 14 between a male die 11 and a female die 12 by pressing the slant face 2 side of the blank pipe 1 by a piston rod 10. In this case, since the gap 14 between the outside peripheral surface of the male die 11 and the inside peripheral surface of the female die 12 is bent in a shape being suitable for bringing an elbow 1A to bend forming, the elbow 1A can be brought to bend forming at a stroke. Also, at the time of drawing out the elbow 1A from the female die 12, the female die 12 is rotated and one end face of the elbow 1A is butted against a frame 20 and by further rotating the female die 12, the elbow 1A is drawn out.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an elbow forming method and a forming apparatus.

[Prior Art] Conventionally, there is a device for bending and forming a long metal vibrator in Japanese Utility Model Application Laid-open No. 54-60638, and a device for bending and cutting a long metal vibrator in Japanese Utility Model Application Publication No. 55-98422 and Japanese Patent Application Laid-Open No. 1987 -153524, etc. These devices require a large facility area to install a device that sends out a long metal vibrator and a device that cuts the metal vibrator after forming it, and the disadvantage is that the elbow forming process is complicated and the manufacturing process is inefficient and difficult. There is.

[Problems to be Solved by the Invention] The present invention does not bend the long metal vibrator and then cut it, but instead prepares a single element pipe with a mountain-shaped elbow whose end surface is inclined from the long metal vibrator. A method and apparatus for cutting and manufacturing the elbow, pressing the small end face of the raw pipe in the axial direction of the wood pipe, pressing the raw pipe into the gap for curve forming between the male mold and the female mold, and fitting it into the curve forming gap. Therefore, it is an object of the present invention to provide an elbow forming method and a forming apparatus for forming a short single elbow tube into a curved shape without bending a long metal vibrator.

Measures to Solve Problem E] (1) The front and rear end surfaces of the raw pipe for forming the elbow are sloped in a mountain shape so that when the elbow is formed, the rising surface and bottom surface are formed at the required angle. The step of forming an elbow molding tube is pressurized from one end into the gap from the end surfaces of the female mold and male mold, which are formed into an arc shape by overlapping with the center radius being the same and leaving a gap. A method for forming an elbow, which is characterized by the following steps:

(2) An elbow that is molded by fitting into the gap between the female mold and the male mold, and rotating either the female mold or the male mold to release the gap between the female mold and the male mold. The elbow molding method according to claim (+), comprising the step of releasing from the mold.

(3) A feed base 5 into which the raw pipe 1 of the elbow 1A is fitted, and an arc-shaped male mold 11 which is opposed to each other with a gap 14 into which the raw pipe 1 of the elbow 1A having the same center of rotation is fitted to form the elbow.
Push the arc-shaped female die 12 and one end of the raw pipe l of the elbow 1A into the gap +4 from the opening end face of the gap 14 between the male die 11 and the female die 12 to create an elbow! An elbow molding device characterized in that the molded elbow A is molded and the molded elbow is taken out from a gap 14 between a male mold 11 and a female mold 12.

(4) A feed stand 5 which is attached to the bed 4 so as to move forward and backward, and is provided with a head 9 having a hole 6 with the axial direction facing the male mold 11 and the female mold iris 2 for accommodating the raw pipe 1 of the elbow. , fixed to the bed 4, and attached to the curved male die 11 to form the elbow 1A and the one-turn disk +3, and the male die l! to form the inner peripheral surface into the elbow 1A! A female mold 12 is curved along the outer circumferential surface to form a gap 14, and a male mold 11 is made of a blank pipe of the elbow 1A accommodated in the hole 6 of the head 9 of the feed table 5.
The piston rod 10 is configured to push out toward the opening end face of the female mold 12, and the piece 20 is arranged to release the elbow 1A from the male mold 11 or the female mold 12. The raw pipe l of the elbow 1A accommodated in the hole 6 of the head 9 is pushed out with the piston rod 10 and pressed into the gap 14 between the male die 11 and the female die 12 to form the elbow 1A. An elbow molding device characterized in that the mold is released from a male die 1.1 or a female die 12.

[Function] In the present invention, the head 9 of the feed table 5 is moved by the piston rod 10.
The raw tube l, which is housed in a molded tube with both linear ends sloped, is extruded in the axial direction of the raw tube 1 and pressed into the curved gap 14 between the male mold 11 and the female mold 12 to form an elbow 1A. None, male type! 1 or the female die 12 is rotated together with the elbow 1A to block the front end to the elbow I with the piece 20, and the male die 11 or the female die 12 is further rotated to release the gap 14 and the elbow 1 is rotated.
A can be removed.

[Example] In FIG. 1A and FIG. 1B, l is a blank pipe for elbow forming, and slopes 2 and 3 are formed in the shape of a mountain on the front end surface and the rear end surface. Further, a rising surface 2' is formed on the slope 2 so as to be convenient for pressing with the piston rod 10. slopes 2 and 3
When the woodwind 1 is bent and formed into an elbow 1A, it becomes a rising surface 2A and a bottom surface 3A at the required angle (Fig. 2A,
Figure B). 4 is a bed, and 5 is a bed as shown in FIG.
This is a feed stand for the raw pipe 1 placed on a bed 4 so as to be movable forward and backward, and a head 9 having a hole 6 for inserting and supporting the raw pipe 1 in the left and right horizontal directions is fixed to the feed base 5. Reference numeral 10a denotes a hydraulic cylinder equipped with a piston rod 10 that presses the raw pipe 1. As shown in FIG. A curved cylindrical gap 14 between a male die 11 and a female die 12 having a conical end surface 11a described below by pressing the second side with a piston rod 10.
Push it into. As shown in FIG.
The female mold 12 is integrally attached to the side surface of the rotary disk 13, and the male mold 11 has an outer diameter slightly smaller than the inner diameter of the raw tube l, and the female mold 12 of the rotary disk 13
The inner diameter of the female die 12 is slightly larger than the outer diameter of the raw pipe 1, and the inner diameter of the female die 12 is formed in an arc shape with the same center radius as the male die 11. Piston rod I
When the rising surface 2' of the slope 2 of the tube 1 is pressed with O, the tube 1 is pushed out to the left in FIG. When it enters the gap 14 and presses the piston rod 10, the raw pipe 1 becomes a male type l! The elbow 1A is formed by entering the gap 14 of the female die 12.

Next, the piston rod 10 is retracted, the feed table 5 is retracted, and the one-turn disk 13 is rotated counterclockwise in FIG. 3. The central axis of the rotating disk 13! 5 (FIG. 6) is mounted on a mounting base 16, a gear +7 is provided on the central axis +5, and a rack 18 that is reciprocated by a hydraulic cylinder 18a is engaged at the southeast +7. When the rack 18 is moved to the right in Figure 3,
The float 17 is rotated counterclockwise. The contact area between the female die 12 and the elbow 1A is larger than the contact area between the elbow 1A and the male die 11, and the elbow 1A, which has a large contact resistance, is sandwiched between the male die 12 and the female die 12 and is inserted into the elbow 1A together with the female die 12. Figure 3: Rotated counterclockwise. The mounting base 16 is provided with a cutting die integrally with the male die 11 with the same center radius as the male die 11,
A piece 20 is provided at the front end of the cutting die to block the end surface 2Δ of the elbow 1A. When the rack 18 is further moved to the right and the gear 7 is rotated, the elbow 1A rises and the piece 2A becomes the piece 20.
However, since the female mold 12 continues to rotate, the female mold 12 is at the position shown by the chain line in FIG. 4, and the elbow 1A falls away from the end surface of the female mold 12. Move the rack 18 back to the left in Figure 3 and the float will appear! 7, the female mold 12 rotates clockwise and returns to its original position. Supply of the raw pipe l of the elbow to the hole in the head 9 of the feed base 5, forward and backward movement of the feed base 5, forward and backward movement of the piston rod 10 of the hydraulic cylinder IOa, and reciprocation of the rack +8 for forward and reverse rotation of the rotary disk 13. The hydraulic pressure switching operation of the operating hydraulic cylinders can also be automatically performed sequentially by an automatic control device.

Connect the raw tube l with the piston rod 10 to the male type 11 and female '112.
When molding the elbow 1A by pushing it into the gap 14, if lubricant is applied to the inner circumferential surface of the female tube 1, when the female die 12 is rotated counterclockwise, the elbow 1A and Since the biting force between the female die 12 and the male die 11 is greater than the biting force between the elbow tube 1 and the male die 11, the molded elbow 1A can be pulled out more reliably than the male die 11. Also, fix the female mold 12.

By rotating the male mold 11 and installing the piece 20 on the female iris 2 side, and applying lubricant to the outer circumferential surface of the elbow tube l, the elbow 1A can be connected to the male mold 11 and the female mold 12 in the same manner as described above. You can leave more easily.

[Effects of the Invention] As described above, the present invention includes slopes in the shape of a mountain on the front and rear end surfaces of the raw pipe l for elbow forming so that when the elbow is formed, the rising face and bottom face are formed at a required angle. Compared to the method of manufacturing a single elbow by molding a long tube using a mating die and cutting both ends? 1
The 2-manufacturing process has been simplified, and it has become possible to mass-produce homogeneous and strong elbows by preventing the occurrence of shear strain when removing the molded elbows from the die. By simply changing the size of the opened head and piston, many types of elbows can be manufactured using the same process and equipment, even in a small factory. Moreover, feed stand 5
A hole 6 for accommodating the raw pipe 1 whose both end faces are formed obliquely into a mountain shape.
By providing the head 9 having the above-mentioned shape, it is possible to more accurately push the elbow tube l housed in the hole 6 into the gap 14 between the male die 11 and the female die 12 from one end face. Also, a gap 1 between the outer peripheral surface of the male mold 11 and the inner peripheral part of the female mold 12 is provided.
4 is curved in a shape suitable for curve forming the elbow 1A, so the piston rod 1 of the hydraulic cylinder 10a
The curved surface of the elbow 1A can be formed all at once by pressing the small end face of the elbow raw tube 1 at 0 and press-fitting the elbow raw tube 1 into the diary gap 14. Also, female type 12
When extracting the more formed elbow 1Δ, the female mold 12 is rotated, one of the small ends of the elbow 1A hits the piece 20, and the female mold t2 is further rotated to extract the elbow 18. Therefore, even if the elbow is made of a hard and strong material such as stainless steel, the elbow can be manufactured more quickly and easily than a wooden elbow, regardless of whether it is large or small.

[Brief explanation of the drawing]

FIG. 1A is a front view of the elbow blank pipe, FIG. 1B is a side view of the same as above, FIG. 2A is a front view of the elbow manufactured according to the present invention, FIG. 2B is a side view of the same as above, FIG. 3 is a partially cutaway front view of the molding apparatus of the present invention, FIG. 4 is an explanatory diagram when the molded elbow is removed from the female mold, and FIG.
FIG. 6 is a perspective view of the molding apparatus of the present invention seen from behind, and FIG. 6 is an enlarged rear view of the same as above with a portion cut away. 1: Elbow tube lA: Elbow 4: Bed 5: Feed base 6: Head hole 9: Head 10: Piston rod 10a: Hydraulic cylinder + 1 = Male type 12: Female type 13: Rotating disk 14: Male type and female type Gap between 20: pieces

Claims (4)

[Claims] (1) The process of forming slopes in the shape of a mountain on the front and rear end surfaces of the raw pipe for forming an elbow so that when the elbow is formed, the rising surface and the bottom surface are formed at the required angle, and the center radius is the same. The process comprises the step of molding an elbow by pressing and pressurizing a raw pipe for forming an elbow from one end of the end face of the female mold and the male mold, which are polymerized and formed in an arc shape with a gap between the two ends. An elbow forming method featuring: (2) An elbow that is molded by fitting into the gap between the female mold and the male mold, and rotating either the female mold or the male mold to release the gap between the female mold and the male mold. The elbow forming method according to claim 1, comprising the step of releasing from the mold. (3) A feed base 5 into which the raw pipe 1 of the elbow 1A is fitted, and an arc-shaped male die 11 which is opposed to each other with a gap 14 into which the raw pipe 1 of the elbow 1A having the same center of rotation is fitted to form the elbow.
The arcuate female mold 12 and one end of the raw pipe 1 of the elbow 1A are pushed into the gap 14 from the opening end face of the gap 14 between the male mold 11 and the female mold 12 to form the elbow 1A, and the molded elbow is An elbow molding device characterized in that the elbow is removed from a gap 14 between a male die 11 and a female die 12. (4) a feed stand 5 that is attached to the bed 4 so as to move forward and backward, and is provided with a head 9 having a hole 6 with the axial direction facing the male mold 11 and the female mold 12 for accommodating the raw pipe 1 of the elbow; A male die 11 is fixed to the bed 4 and curved to form an elbow 1A, and a male die 11 is attached to a rotating disk 13 and curved along the outer circumferential surface of the male die 11 to form the inner circumference into the elbow 1A to form a gap. 14, and the male mold 11 is the raw tube 1 of the elbow 1A accommodated in the hole 6 of the head 9 of the feed table 5.
The piston rod 10 is configured to push out toward the opening end face of the female mold 12, and the piece 20 is arranged to release the elbow 1A from the male mold 11 or the female mold 12. The raw pipe 1 of the elbow 1A accommodated in the hole 6 of the head 9 is pushed out with the piston rod 10 and pressed into the gap 14 between the male die 11 and the female die 12 to form the elbow 1A. An elbow molding device characterized in that the mold is released from a male die 11 or a female die 12.