JP2909646B2 - Tool changing method and tool changing device in printed circuit board drilling machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[Industrial Application Field] The present invention provides a means for holding a plurality of tool set posts each storing a tool, and for appropriately transferring and exchanging the tools stored in any of the posts of the post group to a spindle. TECHNICAL FIELD The present invention relates to a tool changing method and a tool changing device in a printed circuit board drilling machine provided. [Prior Art] In order to shorten the time required for changing the tool 20, a tool for moving the tool 20 stored in the post 21 directly to the spindle 22 without the tool moving chuck or the tool standby post is used. An exchange method has been developed (FIG. 4). Such a tool changing method is such that when the tool 20 is transferred from the post 21 to the spindle 22, the spindle 22 and the other post 21 are transferred.
In order not to cause interference with the tool 20 stored in the spindle 20, a large number of push-up bodies 23 for individually pushing the posts 21 toward the spindle 22 are provided.
It is intended to deliver the tool 20 to 22. [Problems to be Solved by the Invention] In the above-mentioned conventional tool exchange, first, in order to return the tool from the spindle to the post, the corresponding post is pushed up, and after the return, the post is lowered, and then a new tool is returned. Push up the post containing the various tools and pass it to the spindle,
Then, the post needs to be raised and lowered twice, such as lowering the post. For this reason, it is difficult to say that the tool change time is sufficiently reduced. Further, since a push-up body is provided for each post and the push-up bodies are individually driven, there is a problem that the structure of the drive mechanism is complicated, large, and expensive. SUMMARY OF THE INVENTION In view of the above, the present invention aims to further reduce the time required for tool replacement, and further to reduce the cost by simplifying the configuration, thereby providing a tool replacement method and tool for a printed circuit board drilling machine. An exchange device is provided.

[Means for Solving the Problems]

In order to solve the above problems, the present invention provides a printed circuit board drilling machine, in which a spindle is placed in a group of tool setting posts while pressing down the entire group of tool setting posts each storing a tool in a direction away from the spindle. The tool set post is positioned above a predetermined tool set post, and thereafter, the entire tool set post group is moved toward the spindle with an urging force such that the individual tool set post abutting on the spindle is pressed down by the depression of the spindle. In this state, the spindle is lowered to transfer the tool between the spindle and the tool set post group. Thereafter, the entire tool set post group is pushed down, and this pushed down state is maintained. A tool exchanging method in a printed circuit board drilling machine characterized by the following. In order to solve the above problems, the present invention provides a printed circuit board drilling machine, comprising: a post holder for holding a large number of tool setting posts vertically movable in the axial direction of a spindle; and a large number of tool setting posts. A cylinder unit for raising and lowering the cylinder. A tool changing device for a printed circuit board drilling machine, wherein the tool changing device is configured to push up the tool post in a direction away from the spindle after the tool change. [Operation] According to the present invention, the entire group of tool setting posts is pushed up toward the spindle with an urging force such that the individual tool setting posts abutting on the spindle are pressed down by the depression of the spindle. In order to transfer the tool between the spindle and the tool set post group, the spindle is moved down, so that when the spindle is lowered for returning the tool and supplying a new tool, the spindle is lowered. The tool setting post that has interfered is pushed down by the spindle. for that reason,
The return of the tool from the spindle to one tool set post and the supply of a new tool from another tool set post to the spindle can be performed without any trouble. And, since the return of the tool and the supply of the new tool can be continuously performed with the entire post group for each tool set pushed up, the return of the tool and the supply of the new tool are performed by using the tool set. It is sufficient to perform the operation of pushing up the entire post group and pushing it down to the original position once, which can further shorten the tool change time, and also pushes up and down the entire tool set post group. As a result, the size of the apparatus can be reduced and the price can be reduced. EXAMPLES Hereinafter, the present invention will be described in detail based on examples shown in the drawings. FIGS. 1 to 3 show a tool changing device embodying the present invention. In FIG. 1, reference numeral 1 denotes a tool set in which a plurality of tool set posts 3 storing tools 2 are arranged at predetermined intervals. The tool set post group 1 is held by a post holder 4 so as to be vertically movable in a spindle 5 direction. The tool setting post 3 is a bottomed cylindrical body 6, and a ring mounting portion 8 for receiving a positioning ring 7 fitted on the outer periphery of the tool 2 is formed in an upper opening of the cylindrical body 6. Have been. Further, a flange portion 9 is provided on the outer periphery of the lower portion in sliding contact with an inner peripheral wall of a post fitting hole described later. On the other hand, the post holder 4 has a post fitting hole 12 in which a post fitting hole 11 for individually fitting the tool setting post 3 is formed in a box 10 in accordance with the number of the tool setting posts 3.
Is provided. The upper part of the post fitting hole 11 of the post fitting body 12 is opened in the box 10, and the lower part is closed by the bottom plate 13 of the box 10. A gap 14 communicating with the upper opening of the post fitting body 12 is formed between the box body 10 and the post fitting body 12, and the gap 14 communicates with the outside of the box body 10 to form an air passage 15 Is composed. On the other hand, the bottom plate 13 of the box body 10 is formed with an air communication hole 16 for communicating each post fitting hole 11 with the outside.
A seal ring 17 that seals between the outer periphery of the bottomed cylindrical body 6 and the inner peripheral wall of the post fitting hole 11 is mounted on the lower outer periphery of the bottomed cylindrical body 6 adjacent to the flange portion 9. I have. The air passage 15 and the air passage 16 are connected to a compressed air source, and air can be supplied and exhausted from the air passage 15 into the upper side of the post fitting hole 11 partitioned by the flange portion 9. Air can be supplied and exhausted from the through hole 16 to the lower side of the post fitting hole 11 partitioned by the flange portion 9, and all the tool setting posts 3 can be supplied and exhausted by supplying and exhausting compressed air. When air is fed from the air hole 16 into the lower side of the post fitting hole 11 partitioned by the flange portion 9, each tool setting post 3 The air is pushed up all at once through the flange portion 9 pushed up by the air, and the air on the upper side surface of the post fitting hole 11 partitioned by the pushed up flange portion 9 is discharged from the air passage 15, and the air from the air passage 15 Post partitioned by part 9 When air is pressure-fed into the upper side of the fitting hole 11, the tool setting posts 3 are simultaneously pushed down through the flanges 9 pushed down by the air. The air pressure that pushes up the tool setting post 3 is set to an urging pressure at which the tool setting post 3 is individually retracted or lowered by the pressing by the spindle 5. Next, a tool changing operation according to the present invention will be described. First, the spindle 5 is moved so that the tool 2 of the tool set post group 1 held by the post holder 4 is positioned on the tool set post 3 to be returned. Next, by supplying air from the air holes 16 to the respective post fitting holes 11, all the tool setting posts 3 are simultaneously pushed up toward the spindle 5. While maintaining this state, the spindle 5
Is lowered, and the tool 2 is returned to the predetermined tool setting post 3. At this time, the descending spindle 5 contacts and presses the upper end of the tool 2 held by the tool setting post 3 in the vicinity. The pressed tool setting posts 3 are retracted or lowered against the air pressure. Therefore, the return of the tool 2 by lowering the spindle 5 is performed without any trouble. When the tool 2 is returned to the predetermined tool setting post 3 in this manner, the spindle 5 is raised, and the spindle 5 is moved again to move the tool 5 to a position above the tool setting post 3 storing the tool 2 to be newly installed. Position. During operation, each tool post 3 is maintained in a state of being pushed up, and the tool setting post 3 depressed by the lowering of the spindle 5 is released from the pressing by the spindle 5 and the post fitting is carried out from the air hole 16. It returns to the raised position again by the air pressure supplied to the hole 11. After that, the spindle 5 is lowered and the tool setting post 3
A predetermined tool 2 is mounted. Also at this time, the spindle 5 presses another tool 2 near the target tool 2, but the tool setting post 3 storing the pressed tool 2 descends, so that a new tool 2 is mounted. Is performed without any trouble. Thus, the spindle 5 on which the new tool 2 is mounted rises and moves in a predetermined direction, and starts descending for machining. On the other hand, the air supplied from the air passage 16 to the post fitting hole 11 of the post holder 4 is removed, and the air passage 15
Then, air is supplied to the post fitting hole 11 and the raised tool setting posts 3 are simultaneously lowered and the tool changing operation is completed. The above operation is automatically performed by the electric control means. [Effects of the Invention] As described above, according to the present invention, the cooling and supply of the tool can be performed continuously when the tool setting post is raised. Since the operation of raising and lowering the post only needs to be performed once, the time required for the tool change operation can be further reduced, so that the work efficiency is improved, and the raising and lowering of the tool setting post is performed by the post holder. Since all the held tool set posts are raised and lowered at the same time, the push-up means for raising and lowering the tool set post is simplified in its configuration, and the device itself can be miniaturized and greatly reduced. The price can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a tool changer according to the present invention, FIG. 2 is a partially cutaway side view of FIG. 1, FIG. 3 is an explanatory view showing a tool transfer operation, and FIG. It is a partially notched side view which shows the conventional tool changer. DESCRIPTION OF SYMBOLS 1 ... Post group for tool setting, 2 ... Tool 3 ... Post for tool setting, 4 ... Post holder 5 ... Spindle, 10 ... Box 11 ... Post fitting hole, 12 ... Post fitting Coalescence 13 ... Bottom plate, 15 ... Air passage 16 ... Air hole

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B23Q 3 / 155,3 / 157 B23B 41/00

Claims (2)

(57) [Claims] In a printed circuit board drilling machine, a predetermined tool setting post in a tool setting post group is set in a state in which the entire tool setting post group for storing tools is pushed down in a direction away from the spindle. After that, the entire group of tool setting posts is pushed up toward the spindle with such a biasing force that the individual tool setting posts abutting on the spindle are pushed down by the depression of the spindle. In this state, the spindle is lowered to transfer the tool between the spindle and the tool set post group,
Thereafter, the entire tool set post group is pushed down, and this pushed down state is maintained, whereby a tool exchanging method in a printed circuit board drilling machine is provided. 2. A printed circuit board drilling machine comprising: a post holder for holding a large number of tool setting posts vertically movable in an axial direction of a spindle; and a cylinder unit for vertically moving the large number of tool setting posts. The cylinder unit pushes up the entire tool set post group toward the spindle with such an urging force that the individual tool set posts abutting on the spindle at the time of tool change are pushed down by the downward pressing of the spindle, A tool exchanging device for a printed circuit board drilling machine, wherein the entire group of tool setting posts is pushed down in a direction away from a spindle after a tool exchange.