JPH0445800Y2 - - Google Patents

Description

[Detailed description of the invention] <<Field of the invention>> This invention relates to a chuck opening processing unit in a center column type rotary indexing machine. A chuck opening shaft and a deburring member are inserted into the collector chuck, thereby detecting damage to the cutter, processing the chuck opening, etc. in one step.

《Prior art and its problems》 A three-split collect chuck is divided into three parts by slotting with three cutters.
After that, the cutter used to make the slots is checked to see if it is damaged or not, and the opening process is to open the collect chuck as designed, as well as the internal deburring that occurs during molding into three parts. must be done.

However, in the past, the above-mentioned cutter damage detection, expansion process, and deburring process were performed in separate processes, which resulted in extremely poor workability.

《Purpose of the invention》 This invention was made in view of the above-mentioned circumstances.In a central drive type center column type rotary indexing machine, the above-mentioned cutter breakage can be avoided in one process by following the vertical movement of the center column. The purpose is to improve workability by performing the detection, expansion process, and deburring work.

《Structure and effects of the invention》 This invention consists of an index table that rotates intermittently, a fixed table that is arranged above the index table and has a processing unit arranged at each station, and a central part of each of the tables. a center column that protrudes through the index table, moves up and down in conjunction with the index table every divisional rotation, and feeds each of the processing units to the operating position of the index table via a link mechanism; Of each of the above units,
In a rotary index machine in which a chuck opening processing unit is arranged at a chuck opening processing station of a fixed table, the chuck opening processing unit passes through the top and bottom of the fixed table and moves up and down in cooperation with the transmission lever of the link mechanism. a vertically movable quill bearing a bearing within the sleeve and having the center of its lower end facing the center of the jig board on the index table; a height detecting means for detecting the distance between the sleeve and the quill;
A spring that constantly biases the quill downward; a chuck opening shaft that is provided at the lower end of the quill and has a tapered outer periphery of the lower end; and a chuck opening shaft that is integrally provided below the opening shaft via a connecting shaft. and a deburring member having a ball or rod for deburring at the tip, and the chuck opening shaft and the deburring member are placed on the jig board to follow the rise of the center column. It is characterized by being made to enter into a three-part collector chuck.

According to such a configuration, the sleeve, quill, etc. move up and down via the link mechanism following the up and down movement of the center column. Therefore, the chuck opening shaft and deburring member provided at the lower end of the quill enter into the split collect chuck, which is a workpiece placed on the index table via the jig board. If no slot is formed in the cutter, it is assumed that the cutter was damaged in the previous process and no slot is formed, but in this case, the deburring member at the tip cannot penetrate. As a result, although the sleeve descends, the quill stops descending, so the distance between the proximity switch installed at the top of the sleeve and the tip of the quill becomes smaller, allowing conduction to occur and generate a signal, making it easier to detect cutter damage. I can do it. In addition, if the slot is formed accurately, the deburring member at the lower end of the quill and the opening shaft will enter the split collect chuck to deburr the inside of the chuck, and the tapered surface of the chuck opening shaft will remove the collect chuck as designed. can be expanded.

According to the processing unit of the present invention, three functions are possible: cutter damage detection, chuck expansion, and deburring work.
Since the steps can be performed simultaneously by one movement of the center column, the workability of these steps is further improved compared to the conventional method.

<<Description of an Embodiment>> Hereinafter, this invention and an embodiment when applied to a three-part collector chuck will be described in detail based on the drawings.

FIG. 1 shows a rotary index machine equipped with a chuck opening processing unit according to this invention, in which numeral 1 is a fixed table on which a number of processing units are installed around the outer periphery, and numeral 2 is located at the bottom of this fixed table 1. An index table is provided with a jig board 3 to reach its outer periphery, and 4 is a center column that passes through the center of the fixed table 1 and index table 2 and moves up and down. 5 is provided. Further, the index table 2 intermittently rotates in divisions, and each jig board 3 is positioned at each work station of the fixed table 1 at the division stop position, and the center column 4 rotates in each division. By moving the operating plate 5 up and down, the processing unit on the fixed table 1 is moved to the jig plate 3.
It is configured to feed and process the workpiece W held above (a three-split collect chuck in the present invention).

Among the processing units, what is shown in FIG. 1 is the chuck opening processing unit according to the present invention. , a sleeve 12 inserted into the guide sleeve 11 so as to be movable up and down, and a quill 13 inserted through the center of the sleeve 12 and having a chuck opening mechanism, which will be described later, attached to the lower end of the quill 13. flange part 14 of
A U-shaped bracket 16 is attached to the top via a bolt 15.
is attached to the bracket 16, and a proximity switch 17 is attached to this bracket 16. The tip of the quill 13 passes through the hole 15a of the bolt 15 and projects toward the proximity switch 17, and a stopper nut 18 is screwed onto the protruding end of the quill.
The height is detected by maintaining a predetermined distance between the proximity switch 17 and the tip of the quill 13.

Further, a guide member 19 is attached to the lower side of the quill 13 so as to be movable up and down integrally with the quill 13, and a bearing block 20 is attached to the lower end of the guide member 19.

The chuck opening mechanism has the following configuration.

Reference numeral 21 denotes a chuck opening shaft screwed onto the bearing block 20. The outer periphery of the tip of this chuck opening shaft 21 is formed into a tapered shape, and the tip of this chuck opening shaft 21 is deburred via a connecting shaft 21a. A spherical body 22, which is a large part for
A spring 23 is inserted between the quill 13 and the quill 9, and constantly urges the quill 13 downward.

A stopper 24 is fixed to the lower end of the sleeve 12 with a screw 24a.

25 is threadedly inserted parallel to the fixed table 1 and parallel to the sleeve 12, and its upper end abuts against a stopper block 26 protruding from the flange portion 12a of the sleeve 12 to regulate the lower limit lowering position of the sleeve 12. , is a stopper screw for positioning the workpiece machining position of the chuck opening shaft 21.

Next, the feed mechanism of the chuck opening processing unit 10 configured as described above will be explained. This feed mechanism is parallel to the sleeve 12 and is attached to the fixed table 1.
A transmission lever 43 is swingably supported by the support shaft 40 via a fulcrum shaft 41 and has one end connected to the flange portion 14 of the sleeve 12 via a shaft 42; In this case, an actuation shaft 4 is fitted through the actuation plate 5 and whose lower end is connected via a flat link lever 44.
It is composed of a link mechanism consisting of a combination of 5 and 5.

Therefore, as the center column 4 rises, the machining unit 10 descends to perform opening machining on the workpiece W (tripartite chuck) at its lower end. That is, FIG. 1 shows the case where the processing unit 10 is located at the work standby position. When the center column 4 rises from this state, the sleeve 12 descends against the spring 23 via the link mechanism and shaft 42 as described above, and the quill 13 inside the sleeve 12 also moves toward the chuck opening shaft 21 and the deburring ball. It will descend with 22.

By the way, when the workpiece W as shown in FIG. 2 placed on the jig board 3 has no groove formed in the three-split collect chuck, that is, in this case, during the three-split processing in the previous process. In this case, it is assumed that the cutter has already been damaged and the groove has not been cut, but in this case, even if the quill 13 is lowered, the sphere 22
Since the chuck opening shaft 21 cannot enter into the chuck, the lowering of the quill 13 is stopped at that position. However, on the other hand, the sleeve 12 continues to descend until finally the stopper block 26 comes into contact with the stopper screw 25. This causes the quill 13 to rise relative to the entire processing unit 10. As a result, the distance between the proximity switch 17 attached to the sleeve 12 and the tip of the quill 13 becomes smaller, causing conduction and emitting an on signal, which determines that the cutter has already been damaged in the previous process and sounds a buzzer. It makes a sound or lights up a lamp to detect and notify you of cutter damage.

On the other hand, if the 3-part processing is performed accurately, the quill 13 will also descend together with the sleeve 12, and the sphere 22 at the tip of the quill 13 will enter into the chuck as shown in Fig. 3 to deburr the inside of the chuck. At the same time, the tapered surface 21b of the chuck opening shaft 21 opens the three slotted grooves of the chuck, and the chuck expands as designed. Next, when the center column 4 rises further and the stopper lock 26 comes into contact with the stopper screw 25,
The center column 4 is lowered in the opposite direction to that described above, thereby raising the entire lowering unit 10 to complete one operation. The center column is configured to be capable of rapid feed and cutting feed using a cam mechanism (not shown).

In the above embodiment, a proximity switch is provided as a height detection means, but it goes without saying that a limit switch or the like may be used in place of this proximity switch, and a rod may be used instead of a sphere as a deburring member. Of course, it is also possible to use .

As clarified in the above embodiments, according to the chuck opening processing unit according to the present invention, the three processes of cutter damage detection, chuck opening process, and deburring work are performed in one process by one operation of the centrally driven center column. Since it can be carried out, it has advantages such as excellent workability.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the chuck opening processing unit according to this invention, and Fig. 2 is an enlarged sectional view of the three-split collect chuck used in the processing unit of this invention.
FIG. 3 is an enlarged sectional view for explaining the processing state of the collect chuck shown in FIG. 2. FIG. DESCRIPTION OF SYMBOLS 1... Fixed table, 2... Index table, 4... Center column, 5... Operating plate, 10
...Guide sleeve, 12...Sleeve, 16...
... Bracket, 17... Proximity switch, 13...
Quill, 21...chuck opening shaft, 22...ball for deburring, 23...spring.

Claims (1)

[Scope of utility model registration request] An index table that rotates intermittently, and a
and a fixed table on which a processing unit is arranged at each station; A rotary index machine is equipped with a center column that feeds the processing unit to the operating position of the index table via a link mechanism, and among the above units, the chuck opening processing unit is arranged at the chuck opening processing station of the fixed table. The chuck opening processing unit includes a sleeve that passes through the top and bottom of the fixed table and is movable up and down in cooperation with the transmission lever of the link mechanism, a quill that is supported in this sleeve and can be moved up and down, and is installed in the sleeve. a detecting means for detecting the distance between the quill and the quill; a spring for constantly biasing the quill downward; and a deburring device integrally provided at the lower end of the quill with a tapered portion connected to the lower part of the tapered portion. 1. A chuck opening processing unit for a rotary index machine, characterized in that the chuck opening processing unit for a rotary index machine is provided with a member having an enlarged portion serving as a holding member, and the quill is configured to move up and down at a predetermined position on the index table.