TW201412427A - Processing device and processing method for ball valve body - Google Patents

Abstract

A processing device and a processing method for ball valve body comprise steps: firstly providing a cylindrical tube to placing the cylindrical tube into a tube shrinking mold chamber, wherein the tube shrinking mold chamber is provided with an inlet having an upward opening and an outlet having a lower opening, and the cylindrical tube is placed from the inlet; next using a stamping plate block to downwardly stamp the tube shrinking mold chamber to perform a tube shrinking process, wherein the cylindrical tube is shrunk into small pipe diameter from large pipe diameter, and the cylindrical tube with small pipe diameter then is stamped into an elliptical tube, and continuously stamping the elliptical tube into a ball valve body.

Description

Ball valve body processing device and processing method

The invention relates to a processing device and a processing method for a ball valve body, in particular to a method for shrinking a cylindrical tube into a shape of an inner and outer tube by using a shrinking tube mold chamber, and then stamping with two sets of other molds, which can be applied to more sizes. The ball valve body processing method has the advantages of reducing the stamping deformation.

The method for manufacturing the ball valve body can be mainly referred to the "ball valve body manufacturing method" of the Republic of China Patent No. I344526, which comprises the steps of: providing a manifold; and expanding the tube to expand the fistula Inner diameter and outer diameter; placing the manifold in a lower mold, wherein the lower mold has a lower hemispherical mold chamber and a lower open mandrel, the manifold is placed in the lower hemispherical mold chamber, and the lower opening mandrel is aligned a compression process is performed with an upper mold facing the lower mold, and the compression is stopped after the arc ends are formed at the two ends of the manifold, wherein the upper mold has an upper hemispherical mold chamber and an upper open mandrel. A tube system is located in the upper hemisphere mold chamber and aligned with the upper opening mandrel; and the upper mold is continuously moved toward the lower mold to perform a final compression process, and the manifold is pressed into the ball valve body.

The manufacturing method of the conventional ball valve body produces the following problems:

(1) The first expansion of the pipe makes the pipe wall thinner, resulting in unstable stamping forming quality.

(2) The conventional ball valve system first punches out the arc chamfered at both ends of the pipe body, and then performs the next punching ball program, and then punches the ball from the circular chamfered tube into a spherical shape. When the stamping die presses the tubular embryo, there is still a long straight wall size difference between the spherical stamping die and the tubular embryo, and it is easy to apply pressure on both ends of the circular cylindrical tubular shape after punching, so that The tube faces at both ends are rapidly contracted and deformed, causing the straight tubes in the middle portion to be easily twisted.

(3) When stamping at the two ends of the manifold to form a circular arc guide angle, it is necessary to divide the stamping twice to increase the working time. If the conversion stamping position is not correct, it will result in the defective quality of the next stamping ball valve.

Therefore, how to develop a better ball valve body processing method is the direction that the relevant industry should work hard.

The main object of the present invention is to provide a method for manufacturing a ball valve body, which adopts a shrink tube and a stepwise progressive stamping to obtain better stability.

A second object of the present invention is to provide a ball valve body processing device, wherein the processing device used in the pipe shrinking process is a shrinking die chamber, by which the cylindrical pipe can be firstly used. The required pipe diameter is used to reduce the inner and outer pipe diameters.

The invention relates to a processing device and a processing method for a ball valve body. The processing method is that the cylindrical tube is firstly contracted by a shrink tube device, the cylindrical tube after the shrink tube is punched into an elliptical tube, and finally the elliptical tube is stamped into a ball valve. The shrink tube processing device is a shrinking mold chamber, and the shrink tube mold chamber is provided with an inlet portion of the upper opening and an outlet portion of the lower opening, and the feeding passage of the inlet portion and the outlet portion The inlet portion is a conical feed passage, and the inner diameter of the tube is larger than the inner diameter of the outlet portion. The outlet portion has a linear cylindrical feed passage and is integrated by the conical feed extension passage.

The shrinking tube processing method is: cutting the cylindrical tube into a required size, placing the first cylindrical tube into the inlet portion of the shrinking mold cavity and entering the conical feed channel, and then overlapping the second cylindrical tube The upper end of the first cylindrical tube presses the second cylindrical tube downward with a punching plate, and the second cylindrical tube presses the first cylindrical tube relatively downward, and is pushed into the cylindrical feeding passage, the punching After the plate is continuously pressed downward, the first cylindrical tube is reduced and pressed toward the outlet portion of the cylindrical feeding passage, and in this way, the third cylindrical tube is successively placed, and then the second cylindrical tube is retracted by the outlet. The part falls out, which is the cylindrical tube after shrinking.

In order to fully understand the present invention, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The statements in this specification are hereby implemented and are not intended to limit the technical scope of the invention.

The invention provides a processing device and a processing method for a ball valve body, which comprises the following steps: 1. Shrink tube processing steps; Punching the first elliptical tube step; three. The process of changing the die to make the ball valve body; Subsequent processing steps; Card groove processing steps; and six. Complete the steps.

The above objects and advantages of the present invention are not difficult to be obtained from the following selected embodiments. Detailed explanations and detailed explanations are obtained.

Please refer to the first figure, which is a shrink tube device of the present invention, which comprises a stamping plate 1 and a shrinking tube mold chamber 2. The punching plate is disposed on the punching machine and is placed above the shrinking tube mold chamber 2, and the shrink tube The mold chamber 2 is a separate mechanism; the shrink tube mold chamber 2 is provided with a conical feed passage 23 and a cylindrical feed passage 24, the conical feed passage 23 is provided with an inlet portion 21 at the opening, and the cylindrical feed passage 24 is provided at the lower opening. The outlet portion 22, the conical feed passage 23 and the feed passage of the cylindrical feed passage 24 are integrally connected to each other, and the inlet portion 21 starts with a conical feed passage 23, and after extending for a period, the cylindrical feed passage 24 stops at the outlet portion. 22, the diameter of the inlet portion 21 is larger than the diameter of the outlet portion 22, the diameter of the conical feed passage 23 is larger than the diameter of the cylindrical feed passage 24; the shrinkage processing method is as follows: the first cylindrical tube A1 is placed first The conical feed channel 23 of the inlet portion 21 of the shrinking cavity 2 is placed, and the second cylindrical tube A2 is placed over the upper end of the first cylindrical tube A1, and the second cylindrical tube A1 is pressed downward by a punching plate 1. And then pressing the first cylindrical tube circle A1 to the cylindrical feed The passage 24 is press-fitted, and the outlet portion 22 has a smaller diameter than the inlet portion 21. When the first cylindrical tube A1 is placed in the conical feed passage 23, the second cylindrical tube A2 is overlapped and punched by the stamping plate 1. The second cylindrical tube A2, the second cylindrical tube A2 is pressed downward with the pressure to press the first cylindrical tube A1, and is pressed into the cylindrical feeding passage 24 to be pressed out by the outlet portion 22, in this way. The third cylindrical tube A3 is placed, and the second cylindrical tube A2 is contracted to be dropped by the outlet portion 22, that is, It is a cylindrical tube A2 after shrinking.

Continuing, please refer to the processing apparatus of the elliptical tube B as shown in the second and third figures, which includes a first upper mold 3 and a first lower mold 4, the first upper mold 3 and the first lower mold 4 correspondingly, and the stamping apparatus can control the distance therebetween, the first upper mold 3 is provided with an upper mold recess 31 having a central convex portion 32, and the first lower mold 4 is provided with a lower mold concave portion 41 and a The central convex portion 42 and the lower mold concave portion 41 are both semi-elliptical and have an elliptical shape when they are closely adhered; the punching method is to place the cylindrical tube A in the first lower mold 4 On the lower mold recess 41, and the core of the cylindrical tube A corresponds to the central projection 42, the first upper mold 3 is stamped and retracted toward the first lower mold 4, so that the cylindrical tube A forms the elliptical tube B.

The final ball valve body forming processing device, as shown in FIGS. 4 and 5, includes a second upper die 5 and a second lower die 6, the second upper die 5 corresponding to the second lower die 6, and The pressing device can control the distance therebetween. The second upper die 5 is provided with an upper die recess 51 having a central projection 52. The second lower die 6 is provided with a lower die recess 61 and a central projection 62. The elliptical tube B is placed on the lower mold portion 61 of the second lower mold 6, and the upper mold concave portion 51 and the lower mold concave portion 61 are both semi-circular, and are correspondingly closed to be circular; the punching ball valve Step: the elliptical tube B is placed on the lower mold recess 61 of the second lower mold 6, and the elbow tube B is sleeved into the central projection 62, and the second upper mold 5 is directed to the second lower mold. 6 stamping and retracting, so that the elliptical tube B forms a hollow ball valve body C.

That is to say, the invention can carry out the shrinkage of the cylindrical tube according to the size and thickness of the ball valve body diameter required by the customer, and cooperate with the two sets of molds having the axial center positioning design, and press forming twice, and the ball valve can be integrally formed. The body is consistently operated on the production line, so production is rapid.

In summary, the advantages of the present invention are as follows: (1) The use of progressive forming stamping stability is preferred. The invention adopts two sets of molds for progressive forming stamping, which can effectively avoid the problem that the tube body stamping stroke is too long during one stamping, and the ball valve body is stamped and deformed, the ball valve body forming quality is stable, and the twist rate is extremely low.

(2) Pipes with a unit size can be used to achieve a pipe diameter with a larger unit size and can be processed into a ball valve body. The size required by the customer can be greatly matched without hoarding too many sizes. Pipes can save on inventory costs.

From the above detailed description, it will be apparent to those skilled in the art that the present invention can achieve the foregoing objects, and the invention has been in accordance with the provisions of the patent law.

In conclusion, it is only a preferred embodiment of the invention, and is not intended to limit the scope of the invention. That is, the equivalent changes and modifications made by the scope of the patent application of the present invention are covered by the scope of the invention.

A‧‧‧Cylindrical tube

A1‧‧‧First cylindrical tube

A2‧‧‧Second cylindrical tube

A3‧‧‧third cylindrical tube

B‧‧‧ elliptical tube

C‧‧‧Ball valve body

1‧‧‧ Stamping plate

2‧‧ ‧ shrinkage mold room

21‧‧‧ Entrance Department

22‧‧‧Exports Department

23‧‧‧Conical feed channel

24‧‧‧Cylindrical feeding channel

3‧‧‧The first upper mold

31‧‧‧Upper mold recess

32‧‧‧Central bulge

4‧‧‧First die

41‧‧‧ Lower mold recess

42‧‧‧Central bulge

5‧‧‧Second upper mold

51‧‧‧Upper mold recess

52‧‧‧Central bulge

6‧‧‧Second die

61‧‧‧ Lower mold recess

62‧‧‧Central bulge

First figure: The implementation of the shrink tube device and the shrink tube processing of the present invention.

Second Figure: A cylindrical tube of the present invention is placed into a first mold cross-sectional view.

Fig. 3 is a cross-sectional view showing the elliptical tube of the present invention.

Fourth Figure: A cross-sectional view of the elliptical tube of the present invention placed in a second mold.

Fig. 5 is a cross-sectional view showing the final stamping of the ball valve body of the present invention.

Fig. 6 is a cross-sectional view showing a molded body of a ball valve body of the present invention.

1‧‧‧ Stamping plate

2‧‧ ‧ shrinkage mold room

21‧‧‧ Entrance Department

22‧‧‧Exports Department

23‧‧‧Conical feed channel

24‧‧‧Cylindrical feeding channel

A1‧‧‧First cylindrical tube

A2‧‧‧Second cylindrical tube

A3‧‧‧third cylindrical tube

Claims (4)

A processing device and processing method for a ball valve body, comprising the following steps: Shrink tube processing steps; Punching the first elliptical tube step; three. The process of changing the die to make the ball valve body; Subsequent processing steps; Card groove processing steps; and six. Complete the steps. The processing device and processing method for a ball valve body according to claim 1, wherein the shrinking processing device of the shrinking tube processing step comprises a shrinking tube mold chamber and a punching plate block, wherein the shrink tube mold chamber is provided with a conical feed channel. And a cylindrical feeding passage, the opening of the conical feeding passage is an inlet portion, and the lower opening of the cylindrical feeding passage is an outlet portion, the inlet portion has a larger diameter than the outlet portion, and the conical feeding passage extends from the inlet portion to the lower portion to the conical feeding passage integrally extends to The cylindrical feeding passage terminates at the outlet portion; the punching plate is disposed on the punching machine and is disposed above the shrinking tube mold chamber, and is separated from the shrinking tube mold chamber. The processing device and the processing method for the ball valve body according to the second aspect of the invention, wherein the diameter of the conical feed passage is larger than the diameter of the cylindrical feed passage. The processing device and processing method for a ball valve body according to claim 2, wherein the shrinking tube processing method is: placing the first cylindrical tube into the inlet portion of the conical feeding channel of the shrinking tube chamber, and then A cylindrical tube is superposed on the upper end of the cylindrical tube, and the second cylindrical tube is pressed downward by a punching plate, thereby pressing the first cylindrical tube to press the cylindrical feeding channel, when the first cylinder After the tube is placed in the conical feed channel, the second cylindrical tube is overlapped and then punched. The pressing plate block presses the second cylindrical tube, and the second cylindrical tube presses the first cylindrical tube downward by the pressure of the punching plate, and presses the cylindrical feeding channel into the cylindrical portion to be pressed out by the outlet portion, thereby successively The third cylindrical tube is placed, and the second cylindrical tube is contracted to fall out of the outlet portion, that is, the cylindrical tube after the tube is contracted.