JPS6192743A - Joint - Google Patents

Abstract

PURPOSE:To execute a work by a few kinds of machines, and to eliminate waste of a material by executing deep drawing by a press, and thereafter, ironing out a wall thickness of the inside of a cylindrical part from the direction opposite to the drawing direction, and executing building-up on an R part of the base part of the cylindrical part. CONSTITUTION:A base material Wi+1 whose bottom has been punched is formed, and the base material Wi+1 is inserted through a centering pin 14 which its cylindrical part Wi+1b up and placed on a die 16. A punch 17 having a regular outside diameter C which is slightly thicker than an inside diameter Ci+1 of the cylindrical part Wi+1b of the base material Wi+1, and longer than a length D is fixed. A holding cylinder 18 is fitted and installed to the cylindrical part Wi+1b of the base material Wi+1, a flange part Wi+1a is pushed and attached, and subsequently, a ram compressed a spring of the holding cylinder 18, the punch 17 having the regular size C which is thicker than the inside diameter Ci+1 of the cylindrical part extrudes a part of an ironing wall thickness to the downward base part in the direction opposite to the drawing direction, and building-up is executed on an R part Wi+1c. Thereafter, the work piece Wi+1 is finished by a lathe.

Description

[Detailed description of the invention] Fields of use of M-Rakudo The present invention relates to pipe joints.

Prior Art The joint shown in FIG. 1 is required to have a rising portion from the flange portion to the cylindrical portion at a right angle and not be curved. For this purpose, the caps are first punched into a circular shape, a hole is drilled, and one side of the inner diameter is chamfered so that welding can be applied.
A seamless steel pipe cut to a predetermined length is fitted into the hole in the disc, and the circumference of the base is welded together.Then, it is mounted on a lathe and the flange inner and outer i-faces, outer diameter, and end face of the g-tube are aligned. The meat part was carved with a sword.

Problems that the invention aims to solve As the number of processes such as cutting, pressing, welding, and turning increases, machines for each phase such as press machines, cutting machines, welders, and lathes are required, and equipment is required. It is expensive and time-consuming to manufacture, which reduces production and creates cavities in the welded parts, so each piece must be inspected one by one. Furthermore, there is material loss and the unit price per kg of seamless steel pipes. Both factors, such as deliciousness, increase costs, and new measures were needed to overcome the current situation in order to meet the strict demands of customers to reduce unit manufacturing costs.

Means for determining problems 7 - Punch out a disc from a block or plate material, squeeze out the central cylindrical part by deep drawing, punch out the bottom, and then punch it with a punch with a diameter slightly larger than the inner diameter of the cylindrical part from the opposite direction to the drawing direction. The material is extruded and built up on the R part of the base of the cylindrical part, and the end face of the 7-lunge is finished flat by cutting.

Example Embodiments of the present invention will be described below based on the drawings.

A die 1 with a hole equal to the diameter AI (where A<AI) of the disc to be punched is fixed on the table of the press machine.
- The punch 2, which is made with consideration to clearance, is centered and fixed with respect to the die 1, and in order to press the material W1 on the outside of the punch 2, the punch 2 is biased downward by a spring. A ram having a retractable presser cylinder 6 is lowered to punch out a disc W2 of the material 0. This disc W2 is the first stage and is the cylindrical part wob of the product WO.
A hole B1 larger than the outside &E is bored, and the die 4 is placed on the die 4 in the hole formed in the guide cylinder 5, which is a hole for positioning the disk W2 on the outside with the die 4 fixed on the table as the center. A punch 7 with a diameter 01 larger than the inner diameter C of the final drawing cylinder is centered and fixed to the die 4, and a spring is attached to the outside of the punch 7 so as to press the part that will become the 7 flange of the disk W2. A ram provided with a presser foot WJ6 which is biased downward and is capable of retracting is lowered. First, the presser cylinder 6 presses down the disc W2 (then the punch 7 strongly presses the center of the disc W5b't)
Make ty protrusion material W3.

Next, in the second stage of the aperture, the outer diameter B2 of the cylindrical part is adjusted to B(B2 (El
The die 8 has a hole diameter B2 so as to squeeze out the cylindrical part of (B: product circle?! outside diameter), and the outside diameter 02 is G-c, 02 (0
1 (0: inner diameter of the product cylindrical part), hold the material horizontally, put the tip of the drawn cylindrical part into the hole of the die 8, lower the ram with centering\, and punch the cylindrical part W3b with the punch 9. is pressed into the hole of the die, and the seven flange portions W3a are pressed with a presser tube 10 which is urged downward by a spring and is retractable to produce a material W4.

In the 3rd stage of drawing, the 1st stage, etc., the material ws and wi are made using a die with a smaller hole diameter and a longer punch, and in the final stage of drawing, the outer diameter of the cylindrical part becomes the standard size B, and the inner diameter 01 becomes the normal size. Gi (material W1 deeply subtended to O) is slightly smaller in value than dimension O
is made. In the next bottoming process, the cylindrical part wib of the material W1 is
The material W1 is inserted into the stepped hole die 11, which has a hole with the same shape as the outer diameter of the cylindrical portion Wib and a hole with the same diameter as the inner diameter 01 of the cylindrical portion Wib at the bottom. i [A punch 12 with an outer diameter of 01 for punching out the bottom of the Wib was attached, and a presser cylinder 13 was attached to the outside of the punch 12 so as to be biased downward by a spring and retractable in order to press down the 7 langes Via of the material W1. Lower the ram. The punch 12 is inserted into the cylindrical part wtb, and the presser cylinder 13 presses the 7-lunge Via of the material w1 and presses the die 1.
1, and the punch 12 shears the bottom part with a die and punches out the bottom part to remove the material w1+1.

The next build-up process is the cylindrical part Wi+11+ of the material w1+1.
When the centering pin 14 inserted into the hole is urged by the spring 15 to protrude upward by a predetermined amount, the centering pin 14 is inserted into the hole 16 so as to be movable.
The normal outer diameter 0, which is slightly larger than the inner diameter C1+1 of the cylindrical portion Wi+11) of the material w1+1, which is centered relative to the material w1+1, that is, O>0l
-) At -1, a punch 17 with a length longer than D is fixed, and a hole 6B of regular size into which the upwardly facing cylindrical part Wi1lb of the material Wi11 is inserted is punched in the center and pushed downward with a spring. When it is biased towards \ the cylinder of material Wi+1 [Wi-
The ram, on which the presser cylinder 18 is supported so as to be retractable by more than the length of Hb, descends. First, the presser cylinder 18 is fitted into the cylindrical part Wi-)-1b of the material W1+1, and the 7 langes Wi+1a are inserted, and then the ram presses the spring of the presser cylinder to adjust the inner diameter of the cylinder part C.
The punch 17 with regular dimension 0, which is thicker than 1+1, is a cylinder gW1+
Turn the inner surface of 1b in the opposite direction to the folding direction, push out a part of C to the base downward, and build up on R part Wi+10. After this, the workpiece W1+1 is attached to the lathe and the 7-lunge Wi+
Cut the end face of 1a and finish the padded part of the base into an edge. In addition, for peace of mind, the 7-lunge Wi 11a external cylindrical part Wi-Hb end face etc. are finished and the product WO is hung.

Effects As detailed above, in the present invention, after deep drawing with a press, the inner wall of the cylindrical portion is squeezed out from the direction opposite to the drawing direction, and the thickness is built up at R&'6 at the base of the cylindrical portion. Therefore, products with a secure edge on the cylindrical base can be worked with machines such as press machines and lathes, and there is no waste of material, and only one pole type strip or plate material is required, and there are fewer cutting parts. It is extremely economical and can reduce the unit price.

[Brief explanation of the drawing]

Figure 1 is a drawing showing the joint, Figure 2 is from the plate material /
A diagram showing the order in which 7t1 is machined, Figure 6 is a disk punching process diagram, Figure 4 is a first stage drawing process diagram, 5th C is a second stage drawing process diagram, Figure 6 is a bottom punching process diagram, FIG. 7 is a build-up process diagram, and FIG. 8 is a conventional process diagram. Wl, W2. W5. Wi, Wi-)-1---Material
WO---Processed finished product 1.4, 8, 11, 16... Die 2, 7, 9, 12, 17... Punch 5.6, 10
, 13.18... Presser tube Fig. 1 Fig. 8 Fig. 2 F3

Claims (1)

[Claims] (1) After deep drawing the center of a disc material to form a cylindrical part, the bottom part is punched out, and then the material is drawn from the bottom side using a punch with a diameter slightly larger than the inner diameter of the cylindrical part. A joint formed by creating a flow and forming a fill on the R portion of the throttle base, and then processing at least the end face of the flange portion and the fill portion to be flat by turning.