JP3841548B2 - Stabilizer for bar feeder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a steadying device for a bar supply machine that supplies a bar to a bar processing machine such as an automatic lathe.
[0002]
[Prior art]
As shown in FIG. 8, the bar feeder has a feed pipe 3 that feeds the bar 1 to an automatic lathe 2 disposed in front, and a U-shaped cross section that guides the feed pipe 3 and the bar 1 in the axial direction. A guide pipe 4 is provided. The feed pipe 3 is connected to a drive source such as a timing belt 5 and moves in the axial direction of the bar 1. A clamp portion 6 is rotatably attached to the front end of the feed pipe 3. The bar 1 is gripped by the clamp 6 at the rear end and sent to the main shaft 7 of the automatic lathe 2. The bar 1 sent into the main shaft 7 is chucked by the chuck portion 8 provided at the front end of the main shaft 7, is rotationally driven, and is cut by a cutting tool (not shown) provided in front of the chuck portion 8. The bar 1 rotates in a state where the vicinity of the front end is held by the chuck portion 8 and the rear end is held by the clamp portion 6. A lid member 9 is attached to the upper surface of the guide pipe 4 to prevent the rotating bar 1 from popping out. As shown in FIG. 9, the bar 1 rotates in a space sealed by the guide pipe 4 and the lid member 9.
[0003]
[Problems to be solved by the invention]
The inner diameter of the bottom of the guide pipe 4 is set to be approximately equal to the outer diameter of the feed pipe 3 so that the feed pipe 3 is slid in the axial direction of the bar 1. Since the feed pipe 3 has the clamp portion 6 at the tip, there is a limit in reducing the outer diameter of the feed pipe 3. For this reason, when processing the rod 1 having a small diameter of about Φ0.8 to Φ2, a gap is generated between the rod 1 and the guide pipe 4. When the bar 1 is rotated at a high speed while the gap is generated, the bar 1 is swung around in the guide pipe 4 and vibrates. When the bar 1 is swung around, the bar 1 may be deformed into a coil shape or a meandering shape, and finally cut.
[0004]
Accordingly, an object of the present invention is to provide a steadying device for a rod feeder that can prevent the rod 1 from swinging even when the small-diameter rod 1 is rotated at a high speed.
[0005]
[Means for Solving the Problems]
The present invention will be described below. In addition, in order to make an understanding of this invention easy, the reference number of an accompanying drawing is attached in parenthesis writing, However, This invention is not limited to the form of illustration.
[0006]
The invention of claim 1 is used in a bar feeder (12) for feeding a bar (11) to a main shaft (15) of a lathe (13), and the deflection of the bar (11) due to the rotation of the main shaft (15). An anti-sway device (20) of a bar feeder for preventing rotation, comprising a brush (21) having a handle part (22) and a flocked part (23) planted in the handle part (22) The above-described problem is solved by the steadying device (20) of the bar feeder, wherein the hair transplantation part (23) is applied to the outer peripheral surface of the rotating rod (11).
[0007]
According to this invention, when the flocking part (23) of the brush (21) is applied to the outer peripheral surface of the rotating bar (11), the bar (11) swings and vibrates and is displaced in the radial direction. The restoring force is given to the bar (11) by the elasticity of the flocked part (23). Moreover, the vibrational energy of the rod (11) is consumed by the frictional force between the hairs in the flocked portion (23), and a damping force that resists the vibration of the rod (11) is generated. Therefore, by giving a restoring force and a damping force to the rotating rod (11), the rod (11) can be prevented from swinging even when the small-diameter rod (11) is rotated at a high speed.
[0008]
According to a second aspect of the present invention, in the first aspect of the invention, the bar feeder (12) has a guide pipe (17) for guiding the bar (11) in the axial direction, and the brush (21). Is characterized by extending in the longitudinal direction of the guide pipe (17).
[0009]
According to this invention, since the brush (21) is extended along the longitudinal direction of the guide pipe (17), the flocked portion of the brush (21) extends over the entire axial direction of the bar (11). (23) can be applied to the bar (11), and swinging can be prevented over the entire bar (11). Moreover, it can prevent beforehand that a rod (11) swings by pressing down a rod (11) in a guide pipe (17) by a flocking part (23).
[0010]
The invention of claim 3 is the invention of claim 2, wherein the bar feeder (12) has a feed pipe (14) for pushing the bar (11) in the axial direction, and the flocking part (23). Is characterized by being formed in a continuous irregular shape.
[0011]
According to this invention, when the feed pipe (14) feeds the bar in the axial direction, a force that resists the movement of the feed pipe (14) is generated by the flocked portion (23). However, since the flocked portion (23) is formed in a continuous irregular shape, the flocked portion (23) formed in a convex shape escapes to the flocked portion (23) formed in a concave shape. Therefore, the resistance of the flocked part (23) to the movement of the feed pipe (14) can be reduced, and the movement of the feed pipe (14) can be lightened.
[0012]
The invention of claim 4 is characterized in that, in the inventions of claims 1 to 3, the side surface of the flocked portion (23) is applied to the bar (11).
[0013]
According to this invention, when the bar (11) is swung around and displaced in the radial direction, the side surface of the flocked part (23) is brought into contact with the bar (11), so that the hair of the flocked part bends. Therefore, restoring force and damping force can be given to the bar (11) most efficiently.
[0014]
According to a fifth aspect of the present invention, in the first aspect of the invention, the handle portion (55) is formed in a coil shape, the flocked portion (56) is planted on the inner peripheral surface, and the rod is placed in the flocked portion (56). The material (11) is penetrated.
[0015]
According to this invention, as explained in relation to the invention of claim 1, the bar (11) is penetrated into the flocked portion (56) planted on the inner peripheral surface of the handle portion (55) formed in a coil shape. Thus, a restoring force and a damping force can be applied to the bar (11) that swings around from the flocked portion (56), and the vibration of the bar (11) can be attenuated. Moreover, even if the bar (11) is displaced in any direction in the radial direction, the flocked portion (56) is brought into contact with the bar (11), so that the vibration of the bar (11) can be prevented.
[0016]
The invention of claim 6 is characterized in that, in the inventions of claims 1 to 5, lubricating oil is contained in the flocked parts (23, 56).
[0017]
According to this invention, the frictional force acting between the bar (11) and the flocked part (23, 56) is reduced, and the rotation state of the bar (11) is kept good. In addition, it is possible to prevent the rod (11) from being exposed to the frictional force acting between the rod (11) and the flocked portion (23, 56).
[0018]
DETAILED DESCRIPTION OF THE INVENTION
1 to 5 show a steadying device for a bar feeder 12 according to a first embodiment of the present invention. As shown in FIG. 1, the bar feeder 12 has a bar-shaped feed pipe 14, which pushes the bar 11 in the axial direction and performs predetermined processing on a main shaft 15 of a lathe 13 positioned in front. The bar 11 is sequentially supplied in an amount. A clamp portion 16 is attached to the front end of the feed pipe 14 so as to be rotatable around the center line of the feed pipe 14. The clamp portion 16 holds the small-diameter bar 11. The feed pipe 14 and the bar 11 are guided in the axial direction by a guide pipe 17 having an inner diameter that matches the outer diameter of the feed pipe 14. The main shaft 15 of the lathe 13 has a chuck 18 at its front end, and chucks the bar 11 sent from the bar feeder 12. The chucked bar 11 is fed together with the headstock 19 while rotating, and is cut by a cutting tool (not shown) located on the front side of the chuck 18. During the cutting process, the bar 1 is rotated with its front end held by the chuck portion 8 and its rear end held by the clamp portion 6.
[0019]
On the bar supply machine side on the rear side of the main shaft 15, a bar supply apparatus 20 for the bar supply machine that prevents the bar 11 from swinging is provided. The steady rest device 20 includes a brush 21 extending in the longitudinal direction of the guide pipe 17 on the upper portion of the guide pipe 17 and a brush moving mechanism.
[0020]
2 and 3 show the brush 21. The brush 21 has a handle portion 22 extending in the longitudinal direction of the guide pipe, and a flocked portion 23 planted along the handle portion 22. The flocked portion 23 is a collection of fine hairs having a diameter of about Φ0.3, and the planar shape is elongated and formed in a substantially rectangular shape. Further, the hair transplantation part 23 is provided with a cut 23a having a constant width over the entire longitudinal direction at equal intervals. As a result, unevenness is continuously formed in the flocked portion 23 as if thinned out in a comb shape. In addition, in this figure, although a part of cut 23a is shown, the cut 23a is made over the whole longitudinal direction. The material of the hair of the flocked portion 23 is a synthetic resin such as nylon, but may be other animal hair. The handle portion 22 is formed of a groove-shaped metal fitting, and the root portion of the flocked portion 23 is sandwiched and fixed in the groove. In addition, L-shaped metal fittings 24 for coupling the brush 21 to the brush drive mechanism are coupled to the handle portion 22 at several locations in the longitudinal direction.
[0021]
4 and 5 show the brush moving mechanism 25. FIG. The brush moving mechanism 25 includes a brush support portion 26 and an actuator 27 that rotates the brush support portion 26. The brush support portion 26 includes a brush base 28 that supports the brush 21 and an operation fitting 29. The L-shaped bracket 24 coupled to the handle portion 22 is fixed on the brush base 28. The operating metal fitting 29 is attached to the brush base 28 so as to sandwich the fixed pipe 30 extending in the longitudinal direction of the guide pipe 17. Thereby, the brush support part 26 is rotatably supported by the fixed pipe 30. The fixed pipe 30 is supported by a stay member 32 fixed to the frame 31 of the bar feeder 12. Further, the operating metal fitting 29 is connected to the rod 33 of the actuator 27 via a pin 34. The base of the actuator is rotatably supported by the frame 31.
[0022]
When the rod 33 of the actuator 27 extends, the pin 34 moves to the position of the two-dot chain line in the figure, and the brush support portion 26 rotates. When the brush support portion 26 rotates, the brush 21 moves to a position indicated by a two-dot chain line in the drawing and is separated from the guide pipe 17. When supplying a new bar 11, the brush 21 is separated from the guide pipe 17 by the brush moving mechanism 25. On the other hand, when the bar 11 rotates, the rod 33 of the actuator 27 is contracted, and the flocked portion 23 of the brush 21 is put into the guide pipe 17. At this time, as shown in FIG. 4, the side surface 23 b of the flocked portion 23 is brought into contact with the outer peripheral surface of the bar 11. If the brush 21 is put too deep into the guide pipe 17, the flocked portion 23 may be sandwiched between the feed pipe 14 and the guide pipe 17, and smooth movement of the feed pipe 14 may be hindered. For this reason, the brush moving mechanism 25 is adjusted so that the brush 21 does not enter the guide pipe 17 deeply.
[0023]
The feed pipe 14 is connected to a feed pipe drive mechanism 35. The feed pipe drive mechanism 35 is connected to the timing belt 37 that is rotationally driven by a motor, the moving table 38 that is coupled to the timing belt 37 and moves in the axial direction of the bar 11, and connects the moving table 38 and the feed pipe. It consists of a gate-shaped connection fitting 39. The timing belt 37 is rotationally driven by a predetermined amount of rotation of the motor, and the feed pipe 14 is moved in the axial direction of the bar 11 by a predetermined amount. When processing a small-diameter bar, a resin-made small-diameter guide pipe 17 a is fixed in the guide pipe 17. The feed pipe 14 and the bar 11 are guided in the small diameter guide pipe 17a.
[0024]
The bar 11 is supplied from the shelf 40 in a state where the brush 21 is separated from the guide pipe 17. When the bar 11 is supplied, as shown in FIG. 5, the bar 11 is grasped by the clamp 16 at the tip of the feed pipe 14. By feeding the feed pipe 14 in the axial direction of the bar 11, the bar 11 is fed to the main shaft 15 of the lathe 13. The bar 11 sent to the main shaft 15 is held by the chuck 18. The bar 1 is held near the front end by the chuck 18 and at the rear end by the clamp portion 16.
[0025]
As shown in FIG. 5, in the case of a small diameter of about Φ0.8 to Φ2, even if the vicinity of the tip of the bar 11 is gripped by the chuck 18 and the rear end is gripped by the clamp part 16, the bar 11 is not connected to the main shaft 15 and the feed pipe. 14 is not located on the center line 41, and bends and hangs down on the upper surface of the guide pipe 17. For this reason, when the small-diameter bar 11 is processed, the center of gravity of the bar 11 is eccentric from the rotation center of the bar 11. When the bar 11 is rotated while the center of gravity is decentered from the center of rotation, an excitation force is applied to the bar 11 and the bar 11 swings and vibrates.
[0026]
According to the steady rest device of the present invention, since the flocked portion 23 of the brush 21 is applied to the entire bar 11 and the bar 11 is pressed against the upper surface of the guide pipe 17, the swirling of the bar 11 due to rotation is prevented in advance. be able to. Moreover, even when the rod 11 vibrates and displaces in the radial direction by contacting the flocked portion 23 with the outer peripheral surface of the rod 11, the flocked portion 23 gives a restoring force and a damping force to the rod 11, thereby vibrating the rod 11. Can be attenuated. Furthermore, when the bar 11 is displaced in the radial direction by vibration by applying the side surface 23b of the hair transplant 23 to the bar 11, the flock 23 is bent. For this reason, restoring force and damping force can be given to the bar 11 most effectively. Moreover, by including oil in the hair transplantation part 23, while it becomes lubrication of the rod 11 itself, the frictional force which acts between the rod 11 and the hair transplantation part 23 is reduced, and the rotation condition of the rod 11 is favorable. Kept. Therefore, it is possible to prevent the bar 11 from being violated by the frictional force acting between the bar 11 and the flocked portion 23.
[0027]
After the bar 11 is cut by the lathe 13, the feed pipe 14 again feeds the bar 11 toward the main shaft 15 by a predetermined length. At this time, the feed pipe 14 moves in the axial direction of the bar 11 within the flocked portion 23. Since the planar shape of the flocked portion 23 is formed on the unevenness, the flocked portion 23 formed in a convex shape with the movement of the feed pipe 14 escapes to the flocked portion 23 formed in a concave shape. Therefore, the resistance of the flocked portion 23 with respect to the movement of the feed pipe 14 is reduced, and the movement of the feed pipe 14 can be lightened. Moreover, the movement of the feed pipe 14 in the flocked portion can be made lighter and smoother by including oil in the flocked portion. In addition, by making the hair-planting part 23 contact | abut to the feed pipe 14, it is also prevented that feed pipe 14 itself vibrates by the rotation of the rod 11, and violates.
[0028]
6 and 7 show a steadying device for a bar feeder in a second embodiment of the present invention. The steady rest device 50 is provided between the guide pipe 17 and the main shaft 15. The steady rest device 50 includes a support bar 51 fixed to the frame 31 of the bar feeder 12, a cylindrical case 53 fixed to the support bar 51, and a brush 52 provided in the case 53. The
[0029]
The case 53 has a protrusion 53 a that is inserted into the support bar 51 on the bottom surface. A disk-shaped lid member 54 is attached to the case 53. In the lid member 54 and the protrusion 53a, a bar passage hole is opened in accordance with the center line 41 of the main shaft 15 and the guide pipe 17.
[0030]
A brush 52 is provided inside the case 53. The brush 52 is formed in a coil shape with the handle portion 55 spirally wound. As shown in FIG. 7, the flocked portion 56 is planted on the inner peripheral surface of the handle portion 55. The length of the hair of the flocked portion 56 is selected so that a hole 57 is formed in the center of the flocked portion 56. The bar 11 is rotated with the bar 11 passing through the hole 57.
[0031]
Similar to the steady rest device of the first embodiment, the bar 11 is rotated with one end held by the chuck 18 of the main shaft 15 and the other end held by the feed pipe 14. When the bar 11 rotates, the bar 11 swings and vibrates. When the bar 11 is displaced in the radial direction due to vibration, the bar 11 comes into contact with the flocked portion 56. When the bar 11 comes into contact with the flocked part 56, a restoring force and a damping force are applied from the flocked part 56 to the bar 11, and the vibration of the bar 11 is attenuated. Since the flocked portion 56 is provided on the inner peripheral surface of the handle portion 55 formed in a coil shape, even if the bar 11 moves in any direction in the radial direction, the flocked portion 56 hits the bar. For this reason, vibrations in all directions can be efficiently damped.
[0032]
Of course, the steady rest device 20 of the first embodiment and the steady rest device 50 of the second embodiment may be used together. Further, the brush 21 of the steady rest device 20 of the first embodiment may be extended and provided between the main shaft 15 in front of the guide pipe 17.
[0033]
【The invention's effect】
As described above, according to the present invention, the steadying device of the bar feeder includes a brush having a handle portion and a hair transplant portion planted in the handle portion, and rotates the hair transplant portion. Since it hits the outer peripheral surface of the bar, even if the bar swings and vibrates, the restoring force and damping force can be given to the bar by the flocked part of the brush. Therefore, even when a small-diameter bar is rotated at a high speed, the bar can be prevented from swinging.
[Brief description of the drawings]
FIG. 1 is a perspective view of a steadying device for a bar feeder in a first embodiment of the present invention.
FIG. 2 is a plan view of the brush according to the first embodiment.
FIG. 3 is a cross-sectional view of FIG.
FIG. 4 is a cross-sectional view of the steady rest device in the first embodiment.
FIG. 5 is a side view of the steady rest apparatus according to the first embodiment.
FIG. 6 is a cross-sectional view of a steady rest device for a bar feeder in a second embodiment of the present invention.
7 is a cross-sectional view taken along the line P-P in FIG.
FIG. 8 is a perspective view of a conventional bar feeder. FIG. 9 is a cross-sectional view taken along line AA in FIG.
DESCRIPTION OF SYMBOLS 11 Bar material 12 Bar material feeder 13 Lathe 14 Feed pipe 15 Spindle 17 Guide pipe 20, 50 Stabilizer 21 Brush 22, 55 Handle part 23, 56 Flocking part

Claims (6)

It is used in a bar feeder that feeds a bar to a lathe spindle, and is a steadying device for a bar feeder that prevents the bar from swinging due to rotation of the spindle,
An anti-sway device for a bar feeder, comprising a brush having a handle and a flocked portion planted in the handle, wherein the brush is applied to an outer peripheral surface of the rotating rod. 2. The bar supply according to claim 1, wherein the bar feeder has a guide pipe for guiding the bar in the axial direction, and the brush extends in a longitudinal direction of the guide pipe. A steady rest for the machine. The bar feeder includes a feed pipe that is guided in the axial direction by the guide pipe and pushes the bar in the axial direction, and the flocked portion is formed in a continuous uneven shape. The steady rest apparatus for the bar feeder according to claim 2. 4. The steady rest apparatus for a bar feeder according to claim 1, wherein a side surface of the flocked portion is applied to the bar. 2. The steady rest of the bar feeder according to claim 1, wherein the handle is formed in a coil shape, the hair transplant is planted on an inner peripheral surface, and the bar is penetrated into the hair transplant. 6. The steadying apparatus for a bar feeder according to claim 1, wherein lubricating oil is included in the flocked portion.

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