JPH033701A - Method for machining main body of valve - Google Patents

Abstract

PURPOSE:To enable all machinings by a single machine by machining the end face and the other diameter of a flange by setting the center of the main body of a valve as a center of dividing, and then machining a slant hole by setting an intersection of the center line between both valve seats and the center line of the slant hole as a center of dividing. CONSTITUTION:The center Co of the main body of a valve is accorded to a rotational center of dividing, a main plunger 4 is abutted to the abutting face B of a corner piece to clamp the main body W of the valve, next, dividing is carried out to abut the main plunger 4 to an abutting face A to machine the end face W1 and the outer diameter (e) of a flange, dividing is carried out to abut the main plunger to an abutting face (c) to machine the end face W2 and an outer diameter (f) and a first process is finished thereby. During a second process, the main body W of the valve is shifted by a distance (x) to bring the main plunger 4 into contact with the abutting face A of the corner piece 3, upper and lower clamping claws are shifted rearward by (x) to clamp the main body W of the valve by the upper and lower clamping claws round an intersection C1 of the center line L3 of slant holes (a), (b) and the center line L1 of the main body of the valve. After the end face W3 of the main body W of the valve is machined and the dividing is performed to machine the slant hole (a) and a valve seat W4, and the dividing is carried out to machine the slant hole (b) and a valve seat W5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a processing method for processing a valve body of a valve that adjusts the flow rate of fluid.

[Conventional technology and issues of invention]

For example, as shown in FIG. 11, the valve body W has a pair of inclined holes a and b arranged symmetrically with respect to the center line, and the center line of the inclined holes is The method of machining the valve body W when the valve body W does not pass through the center C6 is to first turn the machined surfaces W, , W, and W3 while indexing with an indexing chuck, and then remove the valve from the chuck. Remove the main body W, fix the valve body with a jig that matches the inclination angle α of the inclined holes a and b, poll or drill one inclined hole a with another machine, remove the valve body, and This was done using a method with poor workability and processing efficiency, such as turning the hole, fixing it on the jig again, and processing the other inclined hole in the same way. SUMMARY OF THE INVENTION An object of the present invention is to provide a method for machining a valve body that solves the above-mentioned problems and has excellent machining efficiency and improved machining accuracy.

[Means to solve the problem]

The method of processing a valve body according to the present invention includes, in the first step, aligning the center C8 of the valve body W with the rotation center of the index;
Machining each flange end face W, , W2 and flange outer diameters e and f of the valve body W while performing predetermined indexing,
In the second step, the intersection C1 of the center line passing through the center between both valve seats W, W5 of the valve body W and the center line L3 of the inclined holes a and b of the valve body W is indexed and coincides with the center of rotation. This method is characterized by machining a pair of inclined holes a and b while performing cutting and predetermined indexing.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a main part of an indexing chuck 1 attached to a turning spindle head (not shown), showing the state when a valve body W is processed in the first step of the present invention. 3 is a square piece, rotatably supported in the chuck body 2, and V
Contact surfaces Δ, B, C, and D are provided on which the main blunt plunger 4 and the auxiliary plunger 5 contact, which alternately shift the forward and backward operations by switching the positive pressure. As shown in FIG. 3, Ll+-shaped grooves 3a and 3b are installed in the square piece 3, and the parallel protrusion 9a of the lower clamp claw 9 is connected to the groove 3a.
The clamp claw 9 is fitted onto the square piece 3 through the pin 10.
It is being taken seriously. A piston 6 that rotatably supports the clamp shaft 7 is provided in the jack body 2 so as to be slidable by switching the hydraulic pressure. ”-The clamp claw 8 is
It is attached to a clamp shaft 7 and positioned by a pin 11. The forward movement of the piston 6 grips the valve body W between the upper clamp claw 8 and the lower clamp claw 9.

FIG. 2 shows the state in which the valve body W is processed in the second step of the invention. In order to process the inclined hole ab in the second step, lower clamp claw 8. ``With the F clamp pawl 9 and the valve body moved by χ to the position shown in Figure 1, index the square piece 3 and insert the parallel protrusion 9a of the lower clamp pawl 9 into #3b shown in Figure 3. They fit together, and the lower clamp claw 9 is attached via the eccentric pin 12 having an eccentric amount χ.The upper clamp claw 8 is also attached to a position shifted by χ from the position shown in FIG. As shown in the figure, pin 1 is inserted into pin hole 13a.
3 is fitted and positioned, the bolt 14 is screwed into the screw hole 13c, and the upper clamp claw 8 is attached to the clamp shaft 7.

5 to 7, the center C6 of the valve body W is aligned with the center of rotation of the indexer, and the first step, that is, the flange end faces Wl, W2 and the flange outer diameters e, f are calculated from the state shown in FIG. An overview showing the indexing state when turning is performed while performing a predetermined indexing. In the horizontal plane, the downward direction of the page is the front where the processing tool is located, and the indexing rotates in the direction of the half-hour hand. The contact surfaces A and C of square piece 3 are parallel, and the contact surfaces B and D
The angles of inclination of the holes a and b are equal to the angle of inclination α of the inclined holes a and b. As shown in FIG. 5, the main plunger 4 is brought into contact with the contact surface B, and the valve body W is clamped in this state. Next, indexing is performed, the main plunger 4 is brought into contact with the contact surface A, and the flange cross section W1 and the flange outer diameter e are processed. Next, index the contact surface C.
The main plunger 4 is brought into contact with the main plunger 4, the flange end face W and the flange outer diameter r are machined, and the state shown in FIG. 5 is returned to complete the first step.

After the completion of the first step, in the second step, as shown in FIGS. 8 to 10, the inclined holes a and b and the end surface W3 are machined while performing predetermined indexing, but the center line of the inclined holes a and b is Let CI be the intersection of L3 and the center line L+ of the valve body W, and let χ be the distance between it and the center C8 of the valve body W. In the second step, the intersection point is set as the center of rotation for indexing, so the distance is The valve body will be moved by χ. First, the valve body W and L-clamp claw 8 shown in FIG. Pin 11. Remove the lower clamp claw 9 and pin 10, index the main plunger 4 so that it contacts the contact surface A as shown in FIG. It is moved backward by χ and is placed on the clamp shaft 7 via the positioning pin 13.

In addition, the lower clamp claw 9 is attached to the square piece 3 via the pin 2 which is eccentric by χ.The valve body W shown in Fig. 2 is clamped while being moved by χ. The end face W3 of the valve body W is machined at the position shown in FIG. The hole and the valve seat W are machined, and the second process is completed by returning to the position shown in Fig. The slanted hole and valve seat can be machined in two steps, and the entire valve body can be machined.According to his invention, the machining of the slanted hole, etc. is not limited to turning, but also grinding. .

〔Effect of the invention〕

The same clamping jig can be used in the first and second processes, which not only improves machining efficiency but also improves machining accuracy.Furthermore, one machine can perform all machining of the valve body, reducing equipment costs. Since it is easy to use, it produces economic effects.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of an indexing chuck used in processing in the first step of the present invention. FIG. 2 is a cross-sectional view of the main part of the indexing chuck during processing in step 2. FIG. 3 is a view taken along the X arrow in FIG. FIG. 4 is a view taken along the Y arrow in FIG. Figures 5 to 7 are
1], : A schematic plan view showing the indexing state. Figures 8 to 1O ('', A schematic plan view showing the indexing state of the second valve. Figure 11 is a view showing the valve body. 1. Indexing chuck W, , W, Franz end face e
, f Flann outer diameter a21) Slanted hole j43FIA 3 JP 3701 (4) Under procedure +1 I-TE -Ma [(Method) Display of case 1999 patent application No.] 394.3 -l Go invention Name of the person who amended the processing method of the valve body Relationship with the case Patent applicant: 581 1'EL0729-94-3265 Address: 2-34 Minamiuematsu-cho, Yao-shi, Osaka Prefecture Date of amendment order September 1999 ■ Contents of drawing corrections to be corrected

Claims (1)

[Scope of Claims] A method for machining a valve body, in which a valve body provided with a pair of left and right inclined holes is gripped by an indexing chuck, and each machining location of the valve body is machined while indexing. Then, the center of the valve body is aligned with the center of rotation of the indexer, and the end face and outer diameter of each flange of the valve body are machined while performing the specified indexing. A valve body characterized in that a pair of inclined holes are machined while performing a predetermined indexing by aligning the intersection point between a center line passing through the center and a center line of an inclined hole of the valve body with the center of rotation of the indexer. Processing method. Note that the center of the valve body refers to the intersection of a center line passing through the centers of both lunges and a center line passing through the center between both valve seats.