JPS6017644B2 - Internal processing device for cylindrical workpieces - Google Patents

Description

[Detailed description of the invention] The present invention relates to an apparatus for processing the inner surface of a knotted workpiece.

As an example of a cylindrical workpiece, FIGS. 1 and 2 show a valve body W of a rotary type power steering operating valve.

A spherical boat 2a. 2b. 2c. There is a structure shown in FIGS. 3 and 4 as a bag formation for cutting 2d.
As is clear from the drawing, the cutter 3 is supported by the head center 4 and the tail center 5 using a lathe.
While being clamped with a chuck 6, the workpiece W is fixed to a rectangular jig 7 that also serves as an indexing table, and this jig 7 is placed on a saddle table 8 and fixed with a clamper 9. . Then, by applying cutting feed by operating the saddle handle 10, a pair of opposing boat grooves 2a and 2b are first processed, and then indexing is performed by rotating the pick-up tool 7 by 90 degrees, and the remaining -0 pairs are processed. The boat registers 2c and 2d are processed.

However, in the case of the inner-processed bag pupil as described above,
The indexing of the jig 7, including the operation of the clamper 9, takes a lot of time and reduces processing accuracy, making it unsuitable for mass production.

In view of the above points, it is an object of the present invention to provide a counterfeit bag with an inner surface processed in which workpieces can be automatically indexed without requiring conventional operations.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

Figures 5 to 7 show one embodiment of this invention.
0 is a head stock, 21 is a tail stock arranged to face the head stock 20, and 22 is an indexing device arranged between the head stock 20 and the tail stock 21.

A pick-up board 24 is attached to the main shaft 23 of the headstock 20, and one end of a cutter 25 is attached to the tip of the jig board 24. The main shaft 23 is rotatably driven by a motor 29 via a V-belt 28 along with pulleys 26 and 27.

On the other hand, the tail stock 21 is provided with a retainer 30 that supports the end of the cutter 25, and this retainer 30 can be moved forward and backward by the operation of a cylinder 31 provided at its rear stage. Further, a base body 32 that forms the main body of the index device 22 is attached to a slide table 33, and this slide table 33 is slidably mounted on a base 34, and the index device 22 including the slide table 33 is The mechanism 60 is configured to move back and forth in a direction (lateral direction) 12 perpendicular to the center of the jig board 24 by the cutting feed provided by the cylinder 35, which is the drive source of the mechanism 60.

Inside the base body 32, a rotatable sleeve 37, which is partially provided with a pinion gear 36, is disposed concentrically with the picking board 24 so as to be inserted therein, and the workpiece W is placed at the tip of the sleeve 37.
A chuck 38 for gripping is provided.

The pinion gear 36 is engaged with a rack 39 provided below, and by moving the rack 39 back and forth with a cylinder 40, the sleeve 37 rotates and indexes the workpiece W. be. That is, by rotating the sleeve 37, the dog 41 provided integrally with the sleeve 37 can be moved between the stoppers 42 and 4.
3, the workpiece W is indexed at those two positions, and the rotation angle of the stopper 3 between the stoppers 42 and 43 is set to 90 degrees in advance. Furthermore, these pinion gears 3
6. Index drive mechanism 50 with rack 39, cylinder 40, etc.
It consists of Note that 44 and 45 are proximity switches 3 for confirming and detecting that the workpiece W has been indexed.

Here, the operation of the processing machine configured as described above will be explained.

First, when the holder 30 on the tail stock 21 side is retracted and the dog 41 is in contact with the stopper 42, the center of the chuck 38 and the center of the cutter 25 are aligned (this state is referred to as the initial position). ) Therefore,
In this state, when the work W is passed through the cutter 25 and gripped by the chuck 38 and the cylinder 31 is operated, the held odor 30 moves forward and supports one end of the cutter 25.

Of course, the cutter 25 and the retained odor 30 can rotate relative to each other. Then, the cutter 25 rotates by starting the motor 29, and cutting feed (feed in the direction A in FIG. 7) is applied to the slide table 33 by the operation of the cylinder 35.
As shown in FIG. 8A, the first boat register 2a is processed. Thereafter, when the machining of the port groove 2a is completed, the cylinder 35 operates in reverse, so the slide table 33 turns on the initial position light and moves in the direction A2 in FIG. Process the boat groove 2b in No. 2 (Fig. 8B)
. In this way, when the machining of the boat grooves 2a and 2b is completed, the cylinder 35 moves in reverse again, and the slide table 33 returns to the above-mentioned initial position and once stops.

After this, the cylinder 40 is actuated and the sleeve 37 is moved until the dog 41 hits the other stopper 43 as shown in FIG.
Rotate in the direction. As a result, the workpiece W is rotated 90 degrees and indexed. After this, as in the case of machining the first and second boat grooves 2a and 2b, the third and fourth boat grooves 2c are processed as shown in FIG.
, 2d, and after the completion of the machining, the slide table 33 returns to its initial position and at the same time the rotation of the cutter 25 also stops. Then, after the holder 30 is moved backward by the operation of the cylinder 31, the work W is taken out and 1
The cycle ends, and the same operations as above are repeated thereafter. By the way, if a pulse motor is used in place of the rack 39 and pinion gear 36 in the embodiment described above, the indexing of the quartering positions is not limited to just one, but can also be indexed at arbitrary positions.

As is clear from the above description, according to the present invention, by providing an automatic indexing device that operates substantially in conjunction with the internal machining of the workpiece, there is no need for the so-called setup change work as in the past, and In addition to improving machining accuracy, it can be stabilized, and is extremely effective especially in mass production.

[Brief explanation of drawings]

Figure 1 is a sectional view showing the shape of the valve body of a rotary power steering valve as an example of a cylindrical workpiece.
The figure is a sectional view taken on the 0-Ro line in Fig. 1, Fig. 3 is an explanatory diagram showing the outline of the inner surface machining of a cylindrical workpiece as a subordinate, and Fig. 4 is a view taken along the line W-W in Fig. 3. , FIG. 5 is a perspective view showing the overall structure of the internal processing device according to the present invention, FIG. 6 is a sectional view of FIG. 5,
FIG. 7 is a cross-sectional view taken along the skin line in FIG. 6, and FIG. 8 is an explanatory diagram showing the processing order by the apparatus of the present invention. W... Cylindrical workpiece, 2a, 2b, 2c, 2d
...Port groove, 20...Head stock, 21...Tail stock, 22...Index soma, 24...
...Paper board, 25...Cutter, 30...
Retained odor, 31...Cylinder, 35...
・Cylinder, 36...Pinion gear, 37...Sleaf, 1, 36...Pinion gear, 37...Sleaf, 3
8...Chuck, 39...Rack, 40...Cylinder, 50... Index drive mechanism, 60... Cutting feed mechanism. Figure 1 Figure 2 Figure 3 Figure 4 Figure 6 Figure 5 Figure 7 Figure 8

Claims (1)

[Claims] 1. An internal processing device that performs predetermined cutting at a plurality of index positions in the circumferential direction on the inner periphery of a cylindrical workpiece. a tail stock having a holder that supports the other end of the cutter and is movable back and forth; The indexing device is arranged so as to be inserted into the outer periphery of the jig board, and a cylindrical workpiece is attached to the tip of the indexing device. A rotatable sleeve to which a gripping chuck is attached, an indexing drive mechanism including a drive source for rotating this sleeve and indexing the inner circumference of the cylindrical workpiece into a plurality of parts, and the indexing device are reciprocated. A device for processing the inner surface of a cylindrical workpiece, consisting of a cutting feed mechanism for applying cutting feed.