JP2502197Y2 - Bar cover device for bar feeder - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a bar material for covering the bar material in a gap between both when the bar material is supplied from a bar material supplying machine to a processing machine such as a lathe. Regarding the covering device.

[Conventional technology]

The bar material feeder is designed to continuously feed the elongated bar material to a processing machine such as a lathe.

That is, the rear end of the bar is gripped by the finger chuck and the finger chuck is moved toward the processing machine to feed the bar toward the blade of the processing machine by a predetermined length.

[Problems to be solved by the device]

However, depending on the processing machine, the spindle may move during processing. When cutting the rod while rotating it with such a processing machine, when the remaining amount of the bar decreases and the finger chuck comes into the gap between the bar feeder and the processing machine, the rod moves due to the movement of the spindle. The trailing edge can slip out of the finger chuck.

If the bar comes off the finger chuck, the bar will swing around, which is dangerous and will also hinder machining.

The present invention aims to provide a bar covering device which does not cause any inconvenience even if such bar is dropped from the finger chuck.

[Means for Solving the Problems]

In order to solve the above problems, according to the present invention, a cylinder covering a bar is hung between a tip guide part of a bar feeder and a spindle of a processing machine, and the cylinder slides on the spindle. A structure is adopted in which the distal end guide portion and the main shaft are connected so as to move and rotate together with the main shaft.

[Action]

The cylindrical body rotates with the rotation of the main shaft of a lathe or the like. Therefore, large friction does not occur between the rod and the cylinder.

Further, the cylindrical body slides on the main shaft of the processing machine. Therefore, as the main shaft moves, the tubular body moves along the central axis thereof, and constantly surrounds the bar member during that time.

Since the cylindrical body always covers the bar, even if the bar falls out of the finger chuck of the bar feeder, whirling of the bar is prevented.

〔Example〕

Hereinafter, an embodiment of a bar covering device of a bar feeder according to the present invention will be described.

As shown in FIGS. 3 and 4, the bar material feeder 1 is provided adjacent to a processing machine 2 such as a lathe.

The bar feeder 1 has a frame 3, an operation panel 4 is provided in front of the frame 3, and a keyboard 5 is provided on a part of the operation panel 4. A control box 6 is arranged on the lower surface of the frame 3, and the control box 6 controls the bar feeder.
31 The bar feeding condition is controlled.

The rear end of the rod 7 is firmly held by a finger chuck 9 attached to the front end of the feed pipe 8, and the rear end of the feed pipe 8 is connected to a drive chain 11 via a slider 10. The drive chain 11 is wound around a front drive pulley 12 and a rear driven pulley 13.
The drive pulley 12 is a drive motor via a slip clutch 14.
The bar 7 is driven by the drive motor 15, and the drive force of the drive motor 15 is transmitted to the drive chain 11 via the slip clutch 14 so that the bar 7 is sequentially fed into the processing machine 2 according to a program.

It should be noted that in the frame 3, there are provided anti-swing devices 16 and 16 having a group of rollers that surround the rod 7 in a planetary manner.
A plurality of bases are arranged along the length direction of.

As shown in FIG. 1, a tip guide portion 17 is provided at the extreme end of the frame 3.

The tip guide portion 17 is formed by supporting a guide member 19 having a hole 18 for inserting a rod having a diameter slightly larger than the diameter of the rod 7 to the frame 3 via a ball bearing 20. is there.

As shown in FIG. 3, the processing machine 2 has a headstock 21 for gripping the bar material 7 supplied by the bar material supply machine 1.

A chuck 23 is provided on the cylindrical spindle 22 of the spindle stock 21, and the rod 7 penetrating the spindle 23 is gripped by the chuck 23. Further, a stopper 24 for restricting the stop position of the bar 7 to be machined is provided in front of the chuck 23, and the bar 7 abutting the stopper 24 in front of the chuck 23 has a blade 25 such as a cutting tool. It is processed by.

As shown in FIG. 1, a bar covering device 39 is provided between the tip guide portion 17 of the bar feeder 1 and the main shaft 22 of the processing machine 2.

Reference numeral 26 indicates a cylindrical body for covering the bar 7 which is the main body of the device 39, and the cylindrical body 26 includes the tip guide portion 17 and the spindle.
It has been passed between 22 and.

That is, one end of the tubular body 26 is inserted into the first tubular member 27 that projects further forward than the tip guide portion 17 from the frame 3, and the anti-vibration rubber is provided in front of the first tubular member 27. Ball bearing in the second tubular member 29 connected via 28
Supported through 30. The inner and outer wheels 30a and 30b of the ball bearing 30 are pressed against the step portion 33 of the tubular body 26 and the step portion 34 of the second tubular member 29 by the stop rings 31 and 32, respectively. For this reason, the tubular body 26 is rotatably connected to the tip guide portion 17 side without slipping out from the tip guide portion 17.

The other end of the cylindrical body 26 is connected by being inserted into the through hole 35 of the main shaft 22, as shown in FIGS. 1 and 2. The tubular body 26 is slidable in the through hole 35, and two key grooves 36, 36 are formed on the outer wall of the tubular body 26 in parallel with the central axis of the tubular body 26 and fixed to the main shaft 22. Two keys 37,37 engage these keyways 36,36. Each key 37 is prevented from falling off from the main shaft 22 by a cylindrical screw 38 screwed into the tip of the main shaft 22. This allows
The cylindrical body 26 rotates together with the spindle 22 and relatively moves in the spindle 22 as the spindle stock 21 moves.

Next, the operation of the covering device 39 of the present invention will be described together with the operation of the bar feeder 1 and the processing machine 2.

Initially, the feed pipe 8 is retracted to the rear part of the frame 3, and in this state, the long bar 7 is fed in front of the finger 9 of the feed pipe 8 from a shelf (not shown).
In this state, the drive motor 15 starts rotating. On the other hand, the clutch 14 is open. When the rod 7 is fed to the front of the feed pipe 8, the clutch 14 is connected according to a command from a predetermined controller, the feed pipe 8 advances slightly, and the finger 9 holds the rear end of the rod 7. After that, the feed pipe 8 is intermittently advanced by a predetermined length by the driving of the drive chain 11, and the tip of the rod 7 is pressed against the stopper 24.

Next, when the finger chuck 9 restrains the rod 7, the main shaft 22 is activated to rotate the rod 7. Then, the blade 25 of the processing machine 2 processes the tip portion of the bar 7. At the time of this processing, the cylinder 26 also rotates together with the rotation of the main shaft 22. Further, the main shaft 22 may move to the position shown by the chain line, but at that time, the keys 37, 37 move along the key grooves 36, 36 of the cylinder 26, and the cylinder 26 relatively moves. It will enter into the main shaft 22.

When the machining of the tip portion of the bar 7 is completed in this way, the bar 7 is released and fed until the bar 7 abuts the stopper 24 of the processing machine 2, and the same operation is repeated thereafter. Cutting is done.

When such a cutting process is repeated, the finger chuck 9 enters the cylindrical body 26 while gripping the rear end of the bar 7. In such a state, the headstock 21 moves forward while processing the bar 7, and when the bar 7 is pulled, the bar 7 may fall off the finger chuck 9. However, even in such a case, since the rod 7 is covered with the tubular body 26, the whirling of the rod 7 is prevented.

Thus, when the predetermined processing is completed over substantially the entire length of the bar material 7, the feed pipe 8 and the finger chuck 9 are retracted to their original positions at high speed.

[Advantages of the Invention] Since the present invention has the above-described configuration, the bar can be covered with the cylindrical body during processing. Therefore, when the rear part of the bar material reaches between the bar material feeder and the processing machine, even if the bar material falls off the finger chuck due to movement of the main shaft, etc., its whirling is surely prevented, Safe operation and proper processing can be maintained.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a partly cutaway view of a bar covering device according to the present invention, FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1, and FIG. FIG. 4 is a schematic perspective view of the feeder and the processing machine, and FIG. 4 is an elevational view showing the appearance of the bar feeder and the processing machine. 1 ... bar material feeder, 2 ... machine such as lathe, 3 ... frame, 7 ... bar material, 9 ... finger chuck, 17 ...
Tip guide part, 21 …… spindle base, 22 …… spindle, 23 …… chuck, 25 …… cutting tool, 26 …… cylindrical body, 27,29 …… cylindrical member, 30
...... Ball bearing, 35 ...... Through hole, 36 ...... Key groove,
37 …… Key, 39 …… Bar cover device.

Claims (1)

(57) [Scope of utility model registration request] 1. A cylinder for covering a bar is stretched between a tip guide portion of a bar feeder and a main shaft of a processing machine, and the cylinder slides with respect to the main shaft and together with the main shaft. A bar covering device for a bar feeder, which is connected to the tip guide portion and the main shaft so as to rotate.