JP2565313B2 - Automatic bar material feeder - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a bar material automatic feeder for sequentially and automatically supplying bar materials to a bar material processing machine in the longitudinal direction thereof.

(Prior art) Bar material processing machine is a long bar (about 2-3 m)
It is a machine that produces various mechanical parts such as screws while giving rotational motion to 0.5 to 40 mm), and recently an automatic lathe with NC control is used. Also, as shown in FIG.
The bar material automatic feeder 1 is used in parallel with the bar material processing machine 2 in the supply direction of the bar material 3 (longitudinal direction of the bar material) and one bar material is processed by the bar material processing machine 2. While receiving, while supporting the rotating bar material 3, the bar material is advanced toward the bar material processing machine in accordance with the processing feed speed of the bar material processing machine, and when the processing of one bar material is completed, the remaining Materials (small length part of bar material that cannot be processed) is brought back and discarded,
Next, it is a machine that receives a new bar material 3'rolling down from the bar stock rack 1a and feeds the bar material forward to the bar material processing machine 2 again, and these operations are all automatic. It is supposed to be repeated repeatedly.

As described above, the operation of feeding the bar material forward to the bar material processing machine is reciprocated by the chain 8 driven by a motor (not shown) in the conventional bar material automatic feeder, as shown in FIG. It was carried out by the feeding bar 4 that is described. That is, a bearing 6 is provided at the tip of the feeding bar 4.
The finger chuck 5 was rotatably attached via the bar chuck 3, and the rear end portion of the bar member 3 was inserted into the finger chuck 5 and was moved forward toward the bar member processing machine 2 while supporting the bar member 3. Of. On the other hand, bar processing machine 2
Since the bar material 3 undergoes a considerably high-speed rotation during the processing due to, and a violent rotation shake occurs, the rotation shake preventive device 7 is used to prevent the rotation shake of the bar material 3. Conventionally, each of the rotation steadying devices 7 has been attached to a fixed position. For example, as shown in FIG. 4, the rotation steadying device 7 is attached to the front end portion of the automatic bar material feeder 1 (position indicated by (A)) or the rear end portion of the headstock 2a of the bar material processing machine 2. Installed at (position shown in (B)) or between bar material automatic feeder 1 and bar material processing machine 2 (position shown in (C))
An appropriate support base (not shown) was provided in the above, and it was attached to this support base, or was attached to any position (the position indicated by (D)) which is considered to be the optimum position for the automatic bar material feeder 1. In any case, the rotation steadying device 7 was completely fixed and attached at each position, and could not be moved.

(Problems to be Solved by the Invention) However, as in the conventional case, the bar material processing machine 2 keeps the rear end portion of the bar material always supported by the finger chuck 5 attached to the tip of the feeding bar 4, and the bar material processing machine 2 moves the bar material 3 During processing, the rotational vibration of the bar member 3 and the finger chuck 5 rotating with the bar member 3 is transmitted to the feed bar 4 itself, and the feed bar 4 and a guide rail (not shown) for guiding the feed bar 4 are provided. It was a cause of generating a large chattering vibration between and. Further, the finger chuck 5 is rotatably supported by the body of the feed-in bar via the bearing 6. Therefore, the bearing 6 is easily damaged by vibration and the bar material of the finger chuck 5 itself. There is a problem that the gripping force is inherently weak, cracks are generated from the split portions (slits) 5a formed in the finger chuck 5, and the nails are easily broken.

Therefore, an object of the present invention is to provide an automatic bar material feeder that can solve all the above problems.

(Means for Solving the Problems) In order to achieve the above object, according to the present invention, the bar material is fed forward toward the bar material processing machine in accordance with the processing feed speed of the bar material in the bar material processing machine. In the bar material automatic feeder for, the bar material automatic feeder is attached to the bar material automatic feeder so as to be movable along the longitudinal direction of the bar material automatic feeder, There is provided an automatic bar material feeder, characterized in that a rear end portion of a bar material is gripped by a stopper to move the bar material forward toward a bar material processing machine.

(Operation) According to the present invention, the conventional finger chuck is omitted, and instead, the function of the finger chuck is given to the rotation steadying device. That is,
Since the rotation steadying device is a device for supporting the outer peripheral portion of the bar material to suppress the rotation runout of the bar material, the rotation steadying device inherently has a function of supporting the bar material similarly to the finger chuck. There is no problem even if a rotation steadying device is used instead of the chuck. However, it is not possible to obtain the bar material supply function required for an automatic bar material supply machine simply by omitting the finger chuck and providing a rotation steadying device. Therefore, in the present invention, the concept of attaching the rotation steadying device to a fixed position as in the past is removed, and the rotation steadying device is provided along the longitudinal direction of the bar material automatic feeder as in the conventional finger chuck. In order to provide an automatic bar material feeder that can achieve the above-mentioned object, the rear end portion of the bar material is grasped by the rotation steadying device and is moved forward toward the bar material processing machine. It is what

(Example) Hereinafter, an example of the automatic bar material feeder of the present invention will be described with reference to the accompanying drawings.

Before going into the detailed description of the automatic bar material feeder of the present invention,
First, the basic concept of the automatic bar material feeder 10 of the present invention shown in FIG. 3 will be described in comparison with the conventional automatic bar material feeder 1 shown in FIG. As shown in FIG. 3, the automatic bar material feeder 10 of the present invention is not provided with the finger chuck 5 required for the conventional automatic bar material feeder 1. Further, the automatic bar material feeder 10 of the present invention has a push bar instead of the feeding bar 4 used in the conventional automatic bar material feeder 1.
11 is provided. The push bar 11 corresponds to the conventional feed bar 4 with the finger chuck 5 removed from the tip thereof. The conventional feeding bar 4 gradually advances the bar material 3 toward the bar material processing machine 2 while holding the rear end portion of the bar material 3 by the finger chuck 5 during processing of the bar material 3. The bar material automatic feeder 10 of the present invention
The push bar 11 has no finger chuck. Therefore, the push bar 11 does not have a function of gripping the rear end portion of the bar material 3. According to the present invention, the rotation steadying device 20 has a function of gripping the rear end portion of the bar member 3. As described below, in the present invention, the rotation steadying device
20 is attached so as to be movable along the longitudinal direction of the bar material automatic feeder 10. For example, at the position (I) shown in FIG. Can be moved to the tip (position (II)). After the rotation steadying device 20 reaches the position (II), pushing the rear end portion of the bar material 3 by the push bar 11 and pushing it into the headstock 2a of the bar material processing machine 2 is the same as the conventional feeding method. It is similar to the operation of the bar 4. Also push bar 11
Also, the rear end portion of the new bar material 3'supplied from the bar stock rack 1a is pushed to insert it into the rotation steadying device 20. The linear reciprocating motion of the push bar 11 for these operations is performed by the chain drive device 8 '. still,
Although the diameter of the push bar 11 is shown to be larger than the diameter of the bar material 3 in FIG.
It is preferable that the diameter of is smaller than the diameter of the bar material 3.

Next, the detailed structure of the automatic bar material feeder 10 of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a front view showing a bar member 10 of the present invention, the base 12 of which is supported by front and rear stands 13a and 13b. A rail 13 is fixedly mounted on the base 12 as shown in FIG. A slide block 14 is slidably supported on the rails 13, and a substrate 21 forming a main body of a rotation steadying device 20 is fixedly attached to the slide block 14. Therefore, the rotation steadying device 20 can slide on the rail 13 integrally with the slide block 14. The rotation steadying device 20 shown in FIG. 2 is described in a patent application filed by the applicant of the present application on September 26, 1985 (Japanese Patent Application No. 60-213383, not yet published at the time of filing of the present application). However, this rotation steadying device is shown as an example of the rotation steadying device used in the bar material automatic feeder of the present invention, and of course, other types of rotation steadying devices are used in the present invention. You can also do it.

The schematic configuration of the rotation steadying device 0 shown in FIG. 2 will be described. A hole 22 through which the bar member 3 can pass is provided at the center of a substrate 21 that forms the main body of the rotation steadying device 20. Roller support arms 23a, 23b, 23c, 23d at four surrounding places
Is pivotally attached to the substrate 21. The substrate 21 is fixed to the slide block 14 and can slide on the rail 13 together with the slide block 14. Rollers 24a, 24b, 24c and 24d are rotatably supported at the tip of each roller support arm. Further, levers 25a, 25b, 25c, 25d are fixed to the pivots of the roller support arms, and the levers 25a, 25b, 25b, 25b, 25c, and
Between 25c and 25d are tie bars 26a, 26b and 26, respectively.
c is pivotally attached. One lever 25a is connected to a piston rod 27a of a cylinder device (air cylinder or hydraulic cylinder) 27. Therefore, when the piston rod 27a is extended, the lever 25a and the roller support arm 23a are rotated in the direction indicated by the arrow A (the direction in which the roller 24a is directed toward the center of the hole 22), and at the same time, the other roller support arms 23b, 2b.
3c and 23d are also driven via tie bars 26a, 26b and 26c, which causes all the rollers 24a, 24b, 24c, 24d to simultaneously rotate towards the center of the hole 22. Therefore, the hole 22
The outer peripheral surface of the bar material 3 passing through is gripped by each roller. One lever 25b has a stopper 25b ₁ ,
This stopper 25b ₁ is provided with an abutment piece 28 of an adjusting screw 28 when each roller is closed toward the center of the hole 22 as shown by a chain line.
By making contact with a, the hole 22 of each roller support arm can limit the rotational movement (close amount) toward the center of the hole 22. Therefore, when changing the diameter of the bar material 3 to be machined, the closing amount of each roller support arm can be adjusted by the adjusting screw 28 to obtain the optimum supporting state according to the diameter of each bar material.

Next, the operation of the automatic bar material feeder 10 of the present invention will be described. As shown in FIG. 1, the base 12 of the automatic bar material feeder 10
A turn rest 20 can slide between position (I) and position (II) along a rail 13 mounted above. The position (I) is a position where the rotation steadying device 20 grips a portion near the rear end of the bar member 3 (see FIG. 3, not shown in FIG. 1). First, the bar material is supplied from the bar material stock shelf 1a (Fig. 3) of the bar material automatic feeder 10 by the bar material automatic feeder 10
Guide rails (this guide rail is usually a push bar
11 are provided in a linearly reciprocating floating position, but not shown for the sake of clarity) are supplied one by one. At this time, the push bar 11 is a bar material automatic feeder by a known method.
Leave 10 behind or to the side. Further, the rotation steadying device 20 is also released to the position (II), and the cylinder device 27 of the rotation steadying device 20 is contracted to open the roller support arm. Next, the push bar 11 is moved forward by the chain drive device 8 ′, the tip of the push bar 11 is applied to the rear end of the bar material 3, and the bar material 3 is pushed out,
The tip of the hole in the hole of the steady rest 20 in position (II).
Pass through 22. Next, a rotation steady device 20 through which the bar member 3 is passed
Moves back to the position (I) and extends the cylinder device 27 of the rotation steadying device 20 to close the roller support arm and grip the bar member 3 near the rear end thereof. Bar material 3
Moves toward the bar material processing machine 2 to the right following the processing feed speed of the bar material processing machine 2 (FIG. 3) while the rear end portion is supported by the rotation steadying device 20. At this time, the push bar 11 is advanced toward the bar material processing machine 2 while keeping its tip slightly separated from the rear end portion of the bar material 3. In the bar material processing machine 2, after the tip of the bar material 3 is short-cut, screw parts and the like are sequentially processed. The tip of the push bar 11 does not come into contact with the rear end of the bar material 3 during processing by the bar material processing machine 2. When the processing of one screw part etc. is completed, the bar material 3 is pushed out from the front of the headstock 2a by the corresponding amount in order to process the next screw part etc. At this time, the tip of the push bar 11 is pushed. The bar material 3 is applied to the rear end portion and pushed out. That is, the push bar 11 contacts the rear end portion of the bar material 3 only when the bar material 3 is pushed out, but does not contact the bar material 3 during processing of the bar material 3. Therefore, the vibration due to the rotation of the bar material 3 during processing is not transmitted to the push bar 11. The push bar 11 has a rear end fixed to a fixed bush base 15 and a front end slidably supported by a movable bush base 16. Such a support mechanism is the same as the support mechanism of the conventional feeding bar 4. The fixed bush base 15 is fixed to a chain drive device 8 ′ driven by a motor 17, and the motor 17 gives a forward movement of the push bar 11. This chain drive device is also the same as the chain drive device for moving the feeding bar 4 of the conventional automatic bar material feeder forward. In addition, the rotation steady device 20
The linear reciprocating motion of the rail along the rail 13 is performed by the chain drive device 19 (FIGS. 1 and 3) fixed to the slide block 14. The motor for driving the chain drive device 19 may share the motor 17 for driving the push bar 11, but a dedicated motor (not shown) may be provided. Position the steady rest 20 (I)
And the position (II) positioning motor is controlled by limit switches LS-1 and LS-2, and position (I) and position (II) are controlled by these limit switches.
It can be set appropriately by changing the attachment positions of the LS-1 and LS-2 to the base 21.

(Effect of the Invention) In the conventional bar material automatic feeder, which constantly grips the bar material by the finger chuck 5a attached to the tip of the feeding bar, the rotational vibration of the bar material is always transmitted to the finger chuck and the feeding bar. However, a considerably large noise was generated due to chattering vibration, but the bar material automatic feeder of the present invention does not hold the bar material by the finger chuck, and is movable along the longitudinal direction of the bar material automatic feeder. Since the bar material is gripped by the steady rest and the push bar does not come into contact with the bar material during bar material processing, rotational vibration during bar material processing can be transmitted to the push bar. Therefore, it is possible to prevent generation of noise due to chattering vibration.

Further, according to the present invention, since the bar material is gripped by the rotation steady device having a gripping ability originally larger than that of the finger chuck, the bar material is inherently strengthened like the conventional bar material automatic feeder. It is possible to eliminate the failures that were likely to occur in the small finger chuck and its supporting bearing.

[Brief description of drawings]

FIG. 1 is a front view showing an automatic bar material feeder of the present invention. FIG. 2 is a sectional view taken along the line 2-2 in FIG. FIG. 3 is a plan view showing a schematic configuration of an automatic bar material feeder of the present invention and a relationship with the bar material processing machine. FIG. 4 is a plan view similar to FIG. 3, showing a schematic configuration of a conventional bar material automatic feeder and a relationship with a bar material processing machine. 10 …… Automatic bar material feeder, 11 …… Push bar, 12 …… Base, 13 …… Rail, 14 …… Slide block, 20 …… Rotary steady rest.

Claims (2)

(57) [Claims] 1. A bar material automatic feeder for use with a bar material processing machine for rotating a bar material and cutting the front end portion of the rotating bar material, wherein the bar material processing feed rate in the bar material processing machine. In the bar material automatic feeder for feeding the bar material forward toward the bar material processing machine in accordance with the above, the bar material supplier has a rotatable support member for rotatably supporting the rotating bar material. And a rotation preventing device for the bar material, which is attached so as to be movable along the longitudinal direction of the automatic bar material supplying device, and which is supported by the rotatable supporting member. An automatic bar material feeder, characterized in that the bar material is rotatably supported and the bar material is moved forward toward the bar material processing machine. 2. The rotation steadying device (20) comprises a slide block (14) that slides on a rail (13) provided on the main body of an automatic bar material feeder, and a substrate fixed to the slide block. (21), wherein the rotatable support member comprises rotatable support members (24a, 24b, 24c, 24d) supported by the substrate (11), and the rotation steadying device is attached to the rail. Automatic bar material feeder according to claim 1, characterized in that a drive device (19) is engaged with said slide block for linear reciprocating movement along it.