JPS6051926B2 - Bifurcated pipe processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bifurcated tube processing device for manufacturing a bifurcated tube by performing hydraulic bulge processing, punching press processing, and burring processing on one tube material.

Bifurcated pipes used in various piping devices include hydraulic bulge processed products, cast products, forged products, welded products, etc. Among these, hydraulic bulge processed products are made by bulging a part of the pipe material and attaching it to the bulge part. It is obtained by drilling a hole and then burring the area around the hole to create a new pipe section in that area.

Conventionally, when manufacturing bifurcated pipes, hydraulic bulging, drilling, and burring were each performed using separate and independent processing equipment, so at least three independent processes were required to manufacture this bifurcated pipe. Therefore, there is a problem that the production time, equipment cost, and production cost increase. An object of the present invention is to provide a new type of bifurcated pipe processing device that can manufacture a bifurcated pipe in one continuous process by sequentially performing hydraulic bulging, drilling, and burring. According to the present invention, this object is achieved by forming a first die hole portion extending linearly and extending obliquely with respect to the axis of the first die hole portion at one end thereof midway between the first die hole portion. A die assembly includes a die hole for receiving a bent pipe material, and a die hole for drilling and a press-fitting fluid spout for bulging at a tapered tip. a first core member having a first die hole, which is movably inserted into the first die hole portion from one end thereof, and which enters and fits into the inside of the tube material from one end thereof, and engages with the second die hole portion; A second core member that enters and fits into the inside of the tube material from the other end thereof, and a second core member that enters and fits into the pipe material from the other end thereof, and a second core member that enters and fits into the pipe material from the other end thereof, and a second core member that enters and fits into the pipe material from the other end thereof, and a second core member that enters and fits into the pipe material from the other end thereof, and a second core member that enters and fits into the inside of the tube material, and a second core member that enters and fits into the inside of the pipe material, and a second core member that enters and fits into the inside of the pipe material, and a second core member that enters and fits into the inside of the pipe material, and a second core member that enters and fits into the inside of the pipe material, and a second core member that enters and fits into the inside of the pipe material, and a second core member that enters and fits into the inside of the pipe material. two presser ring members that are inserted into the hole so as to be movable forwards and backwards to press both ends of the tube material; and two retainer ring members that are movably inserted into the first die hole portion from the other end and work together with the die assembly to form a bulge chamber. and a hole punch member supported by the backup member and configured to work with the hole punching die hole of the first cored metal member to punch a hole in the tube material. This is achieved by a bifurcated pipe processing device such as the one shown in the figure. DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings.

The attached FIG. 1 is a plan view showing one embodiment of the bifurcated pipe processing device according to the present invention, and FIGS. 2 and 3 are sectional views taken along the line ■-■ in FIG. FIG. 2 shows the state at the start of machining, and FIG. 2 shows the state at the completion of hydraulic bulge machining.

In these figures, 1 indicates a fixed stand, and this fixed stand 1 has opposing walls 2 and 3 erected at both ends thereof, and is horizontally suspended between the opposing walls 2 and 3 in parallel to each other. It has three guide posts 4. The guide post 4 supports a pair of die halves 5 and 6 movably in the axial direction thereof. The die halves 5 and 6 are driven in directions toward and away from each other by hydraulic cylinder piston devices 7 and 8 attached to the opposing walls 2 and 3, respectively, so that the molds are clamped and opened. The die halves 5 and 6 cooperate with each other to define a die hole 9, and this die hole 9 is formed by a straight first hole passing through the die halves 5 and 6 in the vertical direction in the figure. die hole portion 9a, and the first die hole portion 9a. a second die hole portion 9b extending obliquely with respect to the axis of the first die hole portion 9a and connected at one end to an intermediate portion of the first die hole portion 9a; The tube material is bent in a substantially dogleg shape at a portion and the second die hole portion 9b! People are starting to accept W. As shown in the figure, a first core member 10 is inserted into the first die hole portion 9a of the die halves 5 and 6 in the clamped state from the upper end so as to be freely advanced and retractable.

The first core metal member 10 has an outer diameter that fits into the inner circumference of the tube material 4 W, and its tip is tapered for purling. Further, the first core member 10 has a punching die hole 11 at its tip. The punching die hole 11 is connected to a fluid passage 12, and the fluid passage 12 is connected via a hose 13 to a pressure fluid supply device 14 for bulging. Therefore, the pressurized fluid supplied by the bulge-forming pressurized fluid supply device 14 is ejected from the hole-drilling die hole 11, and this hole-drilling die hole also serves as a bulge-forming pressurized fluid outlet. An ejector rubber 15 for discharging the punched piece is provided in the punching die hole 11. Further, an O-ring 16 is attached to the outer periphery of the tip end of the first core member 1-0, which performs liquid-tight sealing with the tube material W when it is inserted into the tube material W. The first core member 10 is drivingly connected to a hydraulic cylinder piston device 17, and is lowered by the hydraulic cylinder piston device 17 as the bulge process progresses, and is also lowered for the bulge process. . The fixing base 1 integrally has a second core member 19 attached by fixing means 18 such as bolts.

The second core member 19 includes the die half 5 in the mold clamping state,
It has an outer diameter that engages with the second die hole portion 9b of No. 6 and also fits into the inner peripheral portion of the tube material W. This second cored metal member 19 has a recessed portion 20 having an arcuate bottom surface at its distal end so as to support the side circumferential portion of the first cored metal member 10 descending at its distal end. There is also a 01J ring 2 on the outer periphery for providing a liquid-tight seal to the tube material W.
1. Also, the die half 5 in the mold clamping state,
As shown in the figure, a first presser ring member 22 is inserted into the first die hole portion 9a of No. 6 from the upper end so as to be freely advanced and retractable.

This first hold-down ring member 22 is driven by a hydraulic cylinder piston device 23 and engages one end of the tube stock W to keep the end of the tube stock W along its axis during hydraulic bulging. It is designed to be pressed down with a predetermined force in the direction. In addition, a second presser ring member 24 is inserted into the second die hole portion 9b of the die halves 5 and 6 in the mold clamping state from the lower end thereof, so as to be able to move forward and backward as shown in the figure. . This second presser ring member 24 is connected to a hydraulic cylinder piston device 27 via a pin 25 and a presser plate 26, and is driven by this hydraulic cylinder piston device 27, so that the second presser ring member 24 is connected to the other side of the tube material w during hydraulic bulging. The end portion of the shaft is pressed down in the axial direction with a predetermined force. Further, a backup member 28 is inserted into the first die hole portion 9a of the die halves 5 and 6 in the mold-clamped state from the lower end thereof as shown in the figure, so as to be able to move forward and backward.

During hydraulic bulging, the backup member 28 is moved by a hydraulic cylinder piston device 29 to an upper position, as shown, so as to cooperate with the die halves 5, 6 to define a bulge chamber 9c. It's summery. The backup member 28 has a punch support hole 30 passing through its center in the axial direction.
A hole punch 31 is inserted into the hole punch 31 so as to be movable in the axial direction thereof.

The hole-making punch 31 cooperates with a hole-making die hole 11 provided in the first core member 10 to make a hole in a part of the tube material W. Hole punch 31
is adapted to be driven by a hydraulic cylinder piston device 32, and is designed to remain in the punch support hole 30 as shown in the figure during hydraulic bulge processing. Next, the operation of the apparatus constructed as described above will be explained.

First, the die halves 5 and 6 are separated from each other by the hydraulic cylinder piston devices 7 and 8 to open the mold, and in this state, the tube material W bent in a dogleg shape is placed on the second core metal 19. The one end portion is engaged with the second presser ring member 24 until it comes into contact with it. At this time, the second core member 19 fits into the inner peripheral portion of the tube material W. Next, the die halves 5 and 6 are moved toward each other by the hydraulic cylinder piston devices 7 and 8, and the molds are clamped. At this time, the tube material W is engaged with the die holes 9 of the die halves 5 and 6 while being supported by the second core member 19, and is received into the die holes 9. After the mold clamping is completed, the second core member 10 is lowered by the hydraulic cylinder piston device 17,
This is fitted into the pipe material W from the upper end of the first die hole portion 9a of the die hole 9 until it can enter the inside of the tube material W at a predetermined pressure, and is also inserted into the first die hole portion 9a by the hydraulic cylinder piston device 23. The presser ring member 22 is lowered and pressed against one end surface of the tube material w. The state at this time is the second
As shown in the figure. At this time, inside the tube material W, the O-ring 16 of the first core member 10 and the second core member 19 are arranged.
It is sealed in a liquid-tight state by the O-ring 21. At this stage, the pressurized fluid for rebulging is supplied from the pressure fluid supply device 14 for bulging through the hose 13 and the fluid passage 12 to the hole-drilling die hole 11 of the first core member 10 from the tube material w.
inject into the inside of. Then, the hydraulic pressure acts on the inner circumferential surface of the tube material W, and at the same time, the first and second ring members 22 are moved by the hydraulic cylinder piston device 23-27.
, 24 are each driven in the direction of compressing the tube material W in the axial direction, so that a part of the tube material W is compressed into the bulge chamber 9.
It bulges out towards c, as clearly shown in Figure 3.
A bulge portion Wb having a shape that follows the ring portion of the bulge chamber 9c is formed. Also, at this time, the first core member 10 is given a predetermined driving force by the hydraulic cylinder piston device 17, enters the inside of the tube material W as the bulging process progresses, and assists in the bulging process. . When the bulge processing is completed, the first core member 10 is as shown in FIG.
The tip has descended to a position where it comes into contact with the inner circumferential surface of the bulge portion Wb of the tube material W. When the bulge process is completed, the supply of the bulge process pressure fluid by the bulge process pressure fluid supply device 14 is cut off. Then, while the first core member 10 is held in the lowered position as described above by the hydraulic syringe-piston device 17, the hole-drilling punch 31 is raised by the hydraulic syringe-piston device 32,
A hole is made in the bulge portion Wb of the tube material W using the hole punch 31 and the hole punch 11 of the first core member 10 that engages with the hole punch 31 . After this hole drilling is completed, the hole punch 31 is lowered to its original position by the hydraulic cylinder piston device 32, and the backup member 28 is lowered by the hydraulic cylinder piston device 29. And then the hydraulic cylinder piston device 17
, the first core member 10 is further lowered. Then, the tip of the first cored metal member 10 pushes the hole formed in the bulge portion Wb to perform a so-called purring process. As a result, the bulge portion Wb of the tube material w is deformed to follow the outer circumferential surface of the first cored member 10 to form a new tube portion, as shown in FIG. 4. A bifurcated tube like this is obtained. FIG. 5 is a longitudinal cross-sectional view showing a main part of another embodiment of the bifurcated pipe processing apparatus according to the present invention.

In addition, the parts in FIG. 5 that correspond to FIGS. 2 and 3 are as follows:
They are indicated by the same reference numerals as those shown in FIGS. 2 and 3. In the case of this embodiment, the first core member 10 has a small-diameter and tapered purling portion 1'' at its tip, and also has a pressure fluid spout 12'' for bulging. In the first die hole portion 9a of the die hole 9, the portion that receives the backup member 28 is the purling processing portion 1.
``The path has become smaller in response to the In this embodiment, each member operates in the same manner as in the above-described embodiment, and this processing apparatus produces a bifurcated tube as shown in FIG.

Although the present invention has been described above in detail with reference to specific embodiments, it will be appreciated by those skilled in the art that the present invention is not limited to these and that various embodiments are possible within the scope of the present invention. It should be obvious.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing one embodiment of a bifurcated pipe processing device according to the present invention, and FIGS. 2 and 3 are lines shown in FIGS.
FIG. 2 is a sectional view taken along line (2), of which FIG. 2 shows the state at the start of machining, and FIG. 3 shows the state at the completion of hydraulic bulge machining. FIG. 4 is a sectional view showing a bifurcated tube obtained by the bifurcated tube processing apparatus shown in FIGS. 1 to 3, and FIG. 5 shows another embodiment of the bifurcated tube processing apparatus according to the present invention. FIG. 6 is a cross-sectional view of a main part, and FIG. 6 is a cross-sectional view showing a bifurcated tube obtained by the device. 1 - Fixed base, 2, 3 - Opposing wall, 4 - Guide post, 5, 6 - Die half, 7, 8 - Hydraulic cylinder piston device, 9 - Dice hole, 9a - First die hole part, 9b - Second die hole portion, 10~''first core metal member, 11~dice hole for drilling, 12~fluid passage, 1
3 - Hose, 14 - Pressure fluid supply device for bulge processing, 1
5 - Ejector rubber, 16 - O ring, 17 - Hydraulic cylinder piston device, 18 - Fixing means, 19 - Second core member, 20 - Recessed part, 21 - O ring, 22 - First presser ring member, 23 ~ Hydraulic cylinder piston device,
24-second presser ring member, 25-pin, 26-presser plate, 27-hydraulic cylinder piston device, 28-backup member, 29-hydraulic cylinder piston device, 30
~Punch support hole, 31~Drilling punch, 32~Hydraulic cylinder piston device, W~Pipe material, Wb~Bulge portion.

Claims (1)

[Claims] 1. A first die hole portion extending linearly; and a second die hole extending obliquely with respect to the axis of the first die hole portion and connecting at one end to an intermediate portion of the first die hole portion. a die assembly including a die hole for receiving a bent pipe material, and the first die hole portion having a die hole for drilling and a press-fitting fluid spout for bulging at a tapered tip portion; a first core member that is movably inserted into the tube material from one end thereof and enters and fits into the tube material from one end thereof, and the other end portion of the tube material that engages with the second die hole portion; A second core metal member that enters into and fits into the die hole, and is inserted into the die hole from one end of the first die hole portion and the other end of the second die hole portion so as to be freely retractable into the die hole. two holding ring members that press both ends of the tube material; and a backup member that is inserted into the first die hole portion from the other end so as to be freely advanced and retractable and cooperates with the die assembly to define a bulge chamber. , further comprising a punching member supported by the backup member and cooperating with the punching die hole of the first core member to punch a hole in the tube material. Bifurcated pipe processing equipment.