JPH0343102A - Resting device for rod feeder - Google Patents

Abstract

PURPOSE:To simply load a square bar to a bar feeder by providing rollers in four directions with the cross section of a square bar as the center, and interlocking rollers adjoin each other so that they touch the surface while they alternately perform approaching and separation against the rotating square bar. CONSTITUTION:An upper frame 37a vertically rotates against a lower frame 37b with a pin 38 as the supporting point, a hexagonal bar 9 passes through a hole in the center, and rollers 39a, 39b, 39c, 39d are provided in the form of planet with a cross section as the center. And, rollers adjoining each other are supported freely rotatable to shaking links 40a, 40b through pins 41 forming a pair, and the center of the shaking links 40a, 40b depicts a V letter against frames 37a, 37b in the space with pins 41 and supported freely rotatably by pins 42. Rollers 39a, 39b, 39c, 39d shake along the lines extend radially from the central axis A of the hexagonal bar 9 with a right angle, rollers adjoining each other alternately repeat approaching or separation and those on cater-corner each other always pinch the hexagonal bar 9 symmetrically repeating approaching or separation with the central axis A as the center.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a bar feeder that supports a long rectangular bar, such as a square bar, a hexagonal bar, a hexagonal bar, etc., which is gripped by a chuck of a processing machine such as a lathe and rotates. This invention relates to a steadying device.

(Prior Art) A bar feeder continuously feeds a long and slender bar to a processing machine such as a lathe, and also rotatably supports the bar while the processing machine is in operation.

Generally, when a bar is rotated, vibrations are generated due to the rotational movement of the bar, but in order to suppress such vibrations of the supplied bar, the bar feeder is equipped with a steadying device.

However, if the bar has a circular cross section, it is relatively easy to support the bar by supporting it with multiple rollers, etc., but if the bar has a polygonal cross section such as a hexagon, Vibration cannot be prevented without the use of special equipment.

Conventionally, as a steadying device for such a square bar, one disclosed in Utility Model Application No. 80005/1983 has been proposed. This has a structure in which the rod is housed in a hollow cylindrical auxiliary pipe to which oil is supplied, and this auxiliary pipe is supported by a rotation support.

[Problem to be solved by the invention]

However, in this mechanism, since the auxiliary pipe is housed in the fixed pipe, the number of pipes increases and the work of loading the bars becomes complicated.

Furthermore, since oil must be supplied into the pipe during processing, the configuration of the apparatus becomes complicated, such as the need to prepare an oil supply device.

The present invention was made to solve these problems, and its purpose is to easily load square bars into a bar feeder without loading them into a pipe or using a large amount of oil. The purpose of this invention is to provide a steady-brake device that can be used.

[Means to solve the problem]

In order to solve the above problems, the present invention provides a steadying device for a bar feeder that supports the middle part of a rotating square bar held by a chuck of a processing machine such as a lathe, which is installed in the bar feeder. Rollers are arranged on all sides of a rod having a rectangular cross section as the center, and the four rollers move toward and away from the rotating square rod alternately, and the four rollers move toward and away from the rotating square rod. The structure is linked by an interlocking mechanism so that it comes into contact with the surface.

As for the interlocking mechanism, at least two pairs of adjacent rollers are attached to the tip of the swing link so that the adjacent rollers alternately approach or move away from the rotating square bar and contact the surface of the square bar. The swing links may be each pivotably supported, and the center of each swing link may be pivotably supported on the machine frame of the steady-stop device.

In addition, as another interlocking mechanism, four rollers are respectively pivotally supported at the tip of the piston rod, and the cylinders containing each piston are arranged so that working fluid flows back and forth between at least two pairs of adjacent cylinders. It is also possible to adopt a configuration in which the matching rollers are interlocked so that they alternately approach or move away from the rotating square bar and come into contact with the surface of the square bar.

[Effect]

When a square bar rotates due to rotation of the main shaft of a lathe, etc., the distance from the center axis of the square bar to its surface changes periodically, but due to the interlocking mechanism, adjacent rollers alternately approach the surface of the square bar. Or contact the surface while moving away. Further, the oblique rollers exhibit symmetrical movements and contact the surface of the square bar while approaching or moving away from each other.

Therefore, the square rod does not change the position of its central axis and rotates without wobbling. Therefore, stable processing can be performed.

Further, since the roller surface contacts the surface of the rotating square bar, the roller comes into rolling contact with the square bar. Therefore, there is less heat generation, vibration, noise, etc.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, an embodiment of the steadying device for a bar feeder according to the present invention will be described.

Embodiment 1 As shown in FIGS. 2 and 3, a bar 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,
The control box 6 controls the bar feed state of the bar feeder 1.

As shown in FIG. 3, the processing machine 2 has a main shaft 7, and a chuck 8 is provided in the main shaft 7, and the chuck 8 grips a hexagonal bar 9 to be processed. A stopper 10 is provided in front of the chuck 8 to regulate the stopping position of the hexagonal bar 9 to be machined, and the hexagonal bar 9 in contact with the stopper 10 in front of the chuck 8 is machined with a cutter 11 such as a cutting tool. be done.

The rear end of the hexagonal bar 9 is firmly held by a finger 13 attached to the front end of a feed pipe 12, and the rear end of the feed pipe 12 is connected to a driving chino 15 via a slider 14.

This drive chino 15 has a drive pulley 16 in front of it.
a, and is wound by a driven pulley 16b at the rear thereof, and the drive chaino 15 is further wound by a guide pulley 16c.
, 16d.

The driven pulley 16b is connected to a top cut brake 17, and the drive pulley 16a is connected to a rotary encoder 19 via a shaft 18, on which an intermediate pulley 20 is fixed.

This intermediate pulley 20 is connected to an intermediate pulley 22 provided below through a chino 21, and this intermediate pulley 2
2 is a half piece 24a of the slip clutch 24 via the shaft 23
The other half piece 24b is connected to the other half piece 24b and is opposite to this half piece 24a.
is fixed to a shaft 25, and an intermediate pulley 26 is fixed to the other end of the shaft 25, and this intermediate pulley 26 is connected to a main drive pulley 28 via a chino 27. The main drive pulley 28 is connected to a drive motor 29 that is a geared motor, and the drive force of the drive motor 29 is transmitted to the drive chino 15 via the slip clutch 24, whereby the hexagonal bar 9 is sequentially moved into the processing machine according to the program. Sent into 2.

Note that an original position limit switch 30 for regulating the starting position of the feed pipe 12 is provided near the top cut brake 17. The slip clutch 24 is a powder clutch, which transmits the driving force of the drive motor 29 to the drive chain 15, stops the transmission, and furthermore, when the torque of the drive motor 29 exceeds a certain level. When the two halves 24a and 24b slip, torque exceeding a certain level is not transmitted to the drive chain 15.

Inside the control box 6, as shown in FIG. 2, there is an input device 31 for receiving pulses generated from the rotary encoder 19, and for receiving pulse signals from the input device 31, the input device 31 receives the pulse signals from the input device 31 and controls the pulses based on the pulse signals. Slip clutch 24, the drive motor 29, and the blade 11
A control signal from the controller 32 is transmitted to the cutter 11 via an output device 33 and to the drive motor 29 via an inverter 34.

This inverter 34 controls the drive motor 2 according to the feeding state of the hexagonal bar 9 according to a signal from the controller 32.
This is to make the rotational speed of 9 variable. A program for the feeding state of the hexagonal bar 9 to the processing machine 2 is input to the controller 32 via the keyboard 35.

Inside the frame 3, as shown in FIG.
Multiple units are arranged to hold the lines in a straight line.

The steadying device 36 includes a lower frame 37b fixed within the frame 3 and an upper frame 37a coupled to the lower frame 37b with pins 38, as shown in FIG. The upper frame 37a is designed to rotate up and down with respect to the lower frame 37b using a pin 38 as a fulcrum, and the free ends 37c and 37d of both the upper and lower frames 37 can touch each other. Note that the upper frame 37a is rotated by a piston rod of a cylinder (not shown) connected to the upper frame 37a.

The hexagonal rod 9 passes through the central hole formed by overlapping the upper and lower frames 37a, 37b, and four rollers 39 are mounted around the regular hexagonal cross section of the hexagonal rod 9.
a, 39b, 39c.

39d are arranged in a planetary manner.

These four rollers 39a, 39b, 39c.

39d is a swinging link 40a in which rollers adjacent in the lateral direction form pairs so that the rollers at adjacent positions alternately approach or separate from each other and contact the surface of the rotating hexagonal bar 9. , 40b via a pin 41, and the center of each swing link 40a, 40b is positioned so as to draw a V-shape between the pin 41 and the upper and lower frames 37b, 37a, respectively. It is pivotally supported via a pin 42.

As a result of this arrangement, the four rollers 39a, 39b, 39c, and 39d swing and contact the surface of the hexagonal bar 9 as the hexagonal bar 9 rotates, and rotate. That is, each roller 39a, 39b.

39c and 39d swing approximately along a line extending radially from the center axis A of the hexagonal bar at an angle of 90 degrees to each other, and adjacent ones alternately approach or move away from the surface of the hexagonal bar, and rotate diagonally. The crossed rollers move symmetrically toward and away from each other around the central axis A, and the hexagonal bar 9 is always held between them, and the other diagonal rollers move in the same way, but only at 90 degrees with respect to the hexagonal bar 9. Points out of phase are always sandwiched.

As shown in Figure 4, if we plot the distance that adjacent rollers (in this case mutually free) swing as the hexagonal rod rotates for each constant rotation angle of the hexagonal rod, we get , the distance is different between adjacent ones. That is, the center position of the left roller fil, 2, 3, 4, 5
．． 6 is the center position of the right roller I, n, III,
They correspond to IV, V, and VI, respectively, but the lengths between adjacent positions are different between the two rollers. Therefore, the diameters of all the rollers 39a, 39b, 39c, and 39d are desirably set to be large, and their surfaces are made of synthetic rubber.

Next, the operation of the steadying device 36 of the present invention will be explained together with the operation of the bar feeder 1.

Initially, the feed pipe 12 is retreated to a state where the slider 14 is in contact with the original position limit switch 30, and in this state, a long hexagonal bar 9 is inserted from a shelf (not shown) in front of the fingers 13 of the feed pipe 12. sent. In this state, the drive motor 29 starts rotating, while the clutch 24 is open. When the hexagonal bar 9 is fed into the front of the feed pipe 12, the controller 3
Clutch 24 is connected in response to a command from 2, and feed pipe 12 moves forward slightly to grip the rear end of hexagonal rod 9 with its fingers 13. After that, the feed pipe 1
2 is intermittently advanced by a predetermined length by the driving of the drive chino 15, and presses the tip of the hexagonal bar 9 against the stopper 10.

At this time, preferably, the upper frame 37b of the anti-shake device 36 rotates upward a little to separate the roller 39 from the surface of the hexagonal bar 9. Furthermore, the chuck 8 of the processing machine 2 also temporarily releases the hexagonal bar 9.

Next, when the chuck 8 and the rollers 39 restrain the hexagonal bar 9 again, the main shaft 7 is started and the hexagonal bar 9 is rotated. Then, the cutting tool 11 of the processing machine 2 processes the tip portion of the hexagonal bar 9.

When the hexagonal bar 9 rotates, the distance from the central axis A of the hexagonal bar 9 to its surface changes periodically, but the pair of adjacent rollers swings supported by the V-shaped links. Then, while swinging, the rollers alternately move toward or away from the surface of the hexagonal bar, and the oblique rollers move toward or away from each other symmetrically, rolling into contact with the surface of the hexagonal bar.

Therefore, the position of the center axis A of the hexagonal bar does not change, and therefore the hexagonal bar 9 does not swing, allowing stable processing to be performed.

Further, since the surface of the roller 39 is in almost constant contact with the surface of the rotating hexagonal bar 9, the roller 39 comes into rolling contact with the hexagonal bar 9. Therefore, there is less heat generation, vibration, noise, etc.

When the processing of the tip of the hexagonal bar 9 is completed in this way, the hexagonal bar 9 is released in the same manner as described above, and the hexagonal bar 9 is fed until it comes into contact with the stopper 10 of the processing machine 2, and the cutting process etc. will be done.

Thus, the hexagonal bar 9 is intermittently pressed a predetermined number of times and for a predetermined length.
is fed into the processing machine 2 side, and when the predetermined processing is completed over almost the entire length of the hexagonal bar 9, the feed pipe 12 retreats to its original position at high speed.

Note that at the beginning of processing, a process called top cut is performed to slightly cut the tip of the hexagonal bar 9, but during this top cut process, the feed pipe 1
2 is stopped by the action of the top quad brake t7.

Embodiment 2 As shown in FIG. 4, four rollers 39a and 39b are included in the steady stop device 43 in this case.

39c and 39d are each pivotally supported at the tip of the piston rod 44. Adjacent cylinders 46a, 46b, 46c, and 46d containing each piston 45 are fixed to an upper frame 37a and a lower frame 37b, respectively.

Further, adjacent rollers are arranged so that working fluid such as oil can circulate between the cylinders corresponding to each other, so that the adjacent rollers alternately approach or move away from the surface of the hexagonal bar 9. It is linked to make contact.

That is, between the cylinders corresponding to one adjacent roller, the chambers on the same side are connected by a pipe, and in the illustrated example, between the adjacent cylinders, the rod side chamber of the cylinder 46a is connected to the cylinder 46a. Socket a is connected to socket a of the rod-side chamber of cylinder 46b, socket b of the chamber opposite to the rod of cylinder 46a is connected to socket b of the chamber opposite to the rod of cylinder 46b, and the other adjacent cylinders are connected to each other. In this case, the socket a of the rod-side chamber of the cylinder 46c is the socket a of the rod-side chamber of the cylinder 46d, and the socket b of the chamber of the cylinder 46c on the opposite side from the rod is the socket b of the chamber on the opposite side of the rod of the cylinder 46d. are connected to each other.

As a result, adjacent rollers contact the surface of the hexagonal bar while alternately and oblique rollers swing symmetrically with each other. Therefore, the long hexagonal rod 9 rotates without wobbling.

In addition, cylinders 39 a, 39 b, 39 c
.

The connection between the cylinders 39d by a pipe can also be made between the cylinder 39a and the cylinder 39c, or between the cylinder 39b and the cylinder 39d.

In the present invention, the square rod is not limited to a hexagonal rod, but square rods, hexagonal rods, etc. can be used.

Also, four rollers 39a, 39b, 39c.

The interlocking between adjacent rollers 39d is not limited to the above embodiment, but can also be done by connecting them with flexible wires, or by obtaining the movement of one of the adjacent rollers as an electric signal and using it via a servo motor. The other roller may also be moved accordingly.

〔Effect of the invention〕

As described above, the present invention provides a steadying device for a bar feeder that supports the middle part of a rotating square bar held by a chuck of a processing machine such as a lathe, in which a cross section installed in the bar feeder is provided. Rollers are arranged on all sides of the square rod with the cross section as the center, and the four rollers are arranged on the surface of the square rod while adjacent rollers alternately approach or move away from the rotating square rod. Since they are linked by an interlocking mechanism so that they are in contact with each other, when the square bar rotates due to the rotation of the main shaft of a processing machine such as a lathe, the distance from the axis of the square bar to the surface changes periodically, but adjacent rollers contacts the surface of the square rod while alternately approaching or moving away from the surface. Further, the oblique rollers exhibit symmetrical movements and contact the surface of the square bar while approaching or moving away from each other. Therefore, the square rod does not change the position of its central axis and rotates without wobbling. Therefore, there is an effect that stable processing is possible.

Further, since the roller surface contacts the surface of the rotating square bar, the roller comes into rolling contact with the square bar. Therefore, the effect of reducing heat generation, vibration, noise, etc. is achieved.

Furthermore, if the structure is such that at least two pairs of adjacent rollers are each pivotally supported at the tips of the swinging links, and the center of each swinging link is pivotally supported on the machine frame of the steady stop device, the swinging of the rollers can be The motion can be caused by the rotation of the square rod,
This has the advantage of not requiring a special drive source, and also simplifies the interlocking mechanism and simplifies its manufacture, assembly, etc.

Further, the four rollers are each pivotally supported at the tip of the piston rod, and the cylinders housing each piston are arranged so that working fluid flows between at least two pairs of adjacent cylinders, causing the multiple pairs of adjacent rollers to rotate. In the case of a structure in which the rollers are interlocked so that they alternately approach or move away from the square bar and come into contact with the surface of the square bar, the driving force for swinging the roller can be obtained from the rotation of the square bar. , and also has the effect of smoothing the swinging of the rollers.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention, FIG. 1 is a sectional view taken along line 1-I in FIG. 3, and FIG. 2 is a bar feeder equipped with a steadying device according to the present invention. A side view showing the processing machine together with the
Fig. 3 is a conceptual diagram of a bar feeder and a processing machine, Fig. 4 is a conceptual diagram illustrating the movement accompanying the rotation of the hexagonal bars of adjacent rollers, and Fig. 5 is a conceptual diagram of another embodiment of the present invention. FIG. 3 is a sectional view corresponding to the figure. ■... Bar feeder, 2... Processing machines such as lathes, 3...
・Frame, 7... Main shaft, 8... Chuck, 9...
・Hexagonal bar, 11...Knife, 36...Stabilizing device, 3
7a. 37b...Frame, 38...Pin, 39...Roller, 4
0... Swing link, 41... Pin, 42... Pin, 43... Steady device, 44... Piston rod,
45...Piston, 46...Cylinder.

Claims (1)

[Claims] 1. In a steadying device for a bar feeder that supports the middle part of a rotating square bar held by a chuck of a processing machine such as a lathe,
Rollers are arranged on all sides of a bar with a square cross section installed in the bar feeder, and the four rollers are rotated alternately with respect to the rotating square bar. A steadying device for a bar feeder, characterized in that the device is interlocked by an interlocking mechanism so as to contact the surface of the square bar while approaching or moving away from the square bar. 2. At least two pairs of adjacent rollers are arranged on a swing link so that the four rollers are in contact with the surface of the rotating square bar while alternately approaching or moving away from the rotating square bar. 2. The steadying device for a bar material feeder according to claim 1, wherein the swinging links are pivoted at respective tips, and the center of each swinging link is pivotally supported on the machine frame of the steadying device. 3. The four rollers are each pivotally supported at the tip of the piston rod, and the cylinder containing each piston is configured such that working fluid flows between at least two pairs of adjacent cylinders, causing each pair of adjacent rollers to rotate. 2. The steadying device for a bar feeder according to claim 1, wherein the device is interlocked so as to contact the surface of the square bar while alternately approaching or moving away from the square bar.