JP2005288557A - Roller burnishing tool main body and roller burnishing tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact roller burnishing tool applicable to an inside diameter of a small diameter, suitable for multiuse of outside face and end face machining, and adjustable in workpiece pressing force to obtain an excellent finished surface. <P>SOLUTION: This roller burnishing tool 10 is provided with a cylindrical shank 5, a head 4 internally provided in the shank 5 via a rotary shaft 9 and rotated by the workpiece pressing force, and a roller 2a for roll machining. The tool 10 is provided with an energizing means in a shank shaft direction provided in the shank 5, an energizing force adjusting means for adjusting the generated energizing force, and an energizing force converting means for transmitting the energizing force to a head shaft 4b and converting the direction of the energizing force into a rotating direction of the head shaft 4b, to control the workpiece pressing force generated at the time of the roll machining. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a roller burnishing tool for rolling process, and is particularly suitable for versatile applications that can be applied to a compact and small-diameter inner diameter, and can also process outer and end faces, and can obtain a good finished surface. The present invention relates to a roller burnishing tool that can be adjusted.

  In general, the surface to be machined by cutting with an outer diameter tool, boring bar, etc. has a certain limit in surface roughness. Therefore, roller burnishing is performed after cutting to greatly improve the surface roughness, like a mirror. Finishing on a smooth surface is done. The principle of roller burnishing is a kind of plastic working method that rolls the metal surface with a roller and pushes the “mountains” to obtain a smooth finished surface. Since the surface roughness is improved in a short time and the surface is work hardened, it has a feature that a finished surface having excellent durability and wear resistance can be obtained.

FIG. 5 is a cross-sectional view showing a configuration of a conventional roller burnishing tool 30. As shown in FIG. 5, for example, a chuck is mounted on a spindle of a processing machine such as a lathe, and a cylindrical workpiece W is gripped and rotated by the chuck. The roller 32a of the roller burnishing tool 30 is inserted into the inner peripheral surface of the rotated workpiece W, and is normally pushed into the workpiece by about 0.1 to 0.3 mm to generate a workpiece pressing force. This work pressing force rotates the head shaft 34b against the urging force generated by the coil spring 37a via the rotation shaft 39 of the head shaft 34b. As described above, the roller burnishing tool 30 has a feature that the work pressing force applied to the work is applied at right angles to the axis of the head shaft 34b using the lever principle with the rotation shaft 39 as the center. . Specifically, a cylindrical hole is formed in a direction perpendicular to the axial direction of the head shaft 34b, and the coil spring 37a is sandwiched between the spring seat 37b and the washer 37c. Accordingly, the shank 35 is compact in the axial direction and has a simple structure.
US ELLIOTT catalog (import agency; Nitto Trading)

  However, in the conventional burnishing tool 30, since the coil spring 37a is built in the radial direction of the head shaft 34b, there is a problem that the outer diameter of the shank 35 is structurally large and cannot be adapted to a small inner diameter ( (Not applicable to φ60mm or less). Therefore, when machining a small-diameter inner diameter surface, there is a problem that the tool must be replaced with a multi-roller type dedicated to the inner diameter. In addition, structurally, the adjustment range of the workpiece pressing force by the spring is also a limited narrow range, and if the range is exceeded, the spring itself must be replaced, which hinders productivity improvement. . On the other hand, downsizing and expanding the adjustment range of workpiece pressing force are contradictory requests, and it is considered difficult to solve these problems comprehensively with one tool. It was.

  Therefore, the present inventor has devised the invention and invented the present invention in order to solve these problems comprehensively, and can be applied to a compact and small-diameter inner diameter (up to about φ30 mm). It is an object of the present invention to provide a roller burnishing tool suitable for multi-use that can be processed and capable of adjusting a work pressing force capable of obtaining a good finished surface.

  The invention of the roller burnishing tool main body 1 according to claim 1 includes a cylindrical shank 5 to be mounted on a processing machine, and is provided in the shank 5 via a rotation shaft 9 and is rotated by a workpiece pressing force. A roller burnishing tool body 1 having a head 4, an urging means for urging the pusher 8 end surface inserted in the cylindrical shank 5 in the axial direction of the shank 5, and generated by the urging means An urging force adjusting means for adjusting the urging force to be transmitted; and an urging force converting means for transmitting the urging force to the head shaft 4b and converting the direction of the urging force into a rotating direction of the head shaft 4b. The roller burnishing tool main body 1 is characterized in that it controls the pressing force of the rotating direction generated during machining.

  The invention according to claim 2 is the roller burnishing tool main body 1 according to claim 1, wherein the urging force converting means is a pusher of the head shaft 4 b of the head 4 provided via the rotating shaft 9. A guide roller 6 that is formed on the side end face and that is rotatably disposed through a rotation shaft in a recess groove 4c that opens to the rotation direction and the pusher 8 side, and is formed on the end face of the pusher 8 on the head shaft 4b side. The roller burnishing tool main body 1 is characterized in that the urging force is transmitted to the head shaft 4b by changing the direction of the urging force into the rotating direction by abutting and urging the concave inclined surface 8b. It is.

  The invention according to claim 3 includes the roller burnishing tool main body 1 according to claim 1 and a rotatable roller unit 2 for compaction processing disposed in the head body 4a of the head 4. The roller burnishing tool 10.

  According to the first aspect of the invention, it is applicable to a compact and small-diameter inner diameter (φ30 mm or more), suitable for various purposes such as outer diameter and end face processing, and a good finished surface without waviness can be obtained. A roller burnishing tool body capable of adjusting the pressing force can be provided.

  According to the second aspect of the present invention, the configuration of the urging force converting means can convert the direction of the urging force from the axial direction to the workpiece pressing force that is the radial direction while achieving compactness. Accordingly, it is possible to provide a roller burnishing tool main body which can be applied to a small inner diameter, is suitable for various uses capable of processing an outer surface and an end surface, and is capable of adjusting a pressing force capable of obtaining a good finished surface without waviness or the like. Can do.

  According to the invention of claim 3, the pressing force can be adjusted to a compact and small-diameter inner diameter, suitable for various uses such as outer diameter and end face processing, and capable of obtaining a good finished surface without waviness or the like. Can be provided.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view showing a configuration of a roller burnishing tool 10 according to an embodiment of the present invention. It may be exaggerated for convenience of explanation. The roller burnishing tool 10 includes a roller unit 2 for rolling. The roller unit 2 is arranged near the outer diameter (on the side in contact with the workpiece) by being eccentric to the head body 4a via the roller pin 2e. This is to prevent the head body 4a from contacting the workpiece during the rolling process. The roller unit 2 is arranged with an inclination of several degrees with respect to the head axis, and the outer periphery of the roller has a truncated cone shape. This means that when the head shaft 4b which is inclined is not pressed during machining, the work surface of the workpiece and the outer peripheral surface of the roller 2e are kept substantially parallel to ensure an appropriate contact surface to the workpiece and a space. This is to increase efficiency and adapt to small-diameter inner diameter machining.

  The roller unit 2 is mainly composed of a roller 2a with a built-in needle bearing 2b, a thrust bearing 2c for receiving a thrust load, a disc spring 2d for generating axial pressing force, and a roller pin 2e. ing. The roller pin 2e has a cylindrical shape, and a flange (flange) is formed at the center, and a roller 2a and the like are fitted and disposed at the outer peripheral portion on the front end side. Specifically, the tip side of the roller pin 2e is provided with a disc spring 2d that generates an urging force, a thrust bearing 2c is inserted through a spacer 2h, and a roller 2a with a built-in needle bearing 2b is inserted. , Sandwiched between the cover 2f and screwed to the roller pin 2e with a hexagon socket countersunk bolt 2g. On the other hand, the rear end side outer peripheral portion of the roller pin 2e is threaded, and is screwed and fixed to the head body 4a. Usually, in order to prevent loosening of the screw due to vibration or the like, the screw is prevented from coming off by a stopper bolt or the like (not shown).

  The head 4 includes a head body 4 a that protrudes from the shank 5 and a head shaft 4 b that is inserted into the shank 5. The head shaft 4b is provided with a rotating shaft 9. As an example, the head shaft 4b is connected to the shank 5 with a pin serving as the rotating shaft 9, and is disposed in the shank 5 so as to be rotatable in the direction of the workpiece pressing force. .

  The shank 5 has a cylindrical shape. As an example, a slide bush 5 a is inserted in the vicinity of the central portion of the inner periphery of the shank 5. The gap between the inner peripheral surface of the shank 5 and the outer peripheral surface of the pusher 8 is appropriately maintained, the sliding resistance in the axial direction of the pusher 8 is reduced, and the pressing force is controlled smoothly, so that the workpiece W of the roller 2a is controlled. This is because the followability to the unevenness of the work surface can be further improved. Therefore, the slide bush 5a protrudes from the inner peripheral surface of the shank 5.

  FIG. 2 is a cross-sectional view showing a specific configuration of the urging force converting means. FIG. 2A is a partially enlarged view of FIG. 1 showing the configuration of the shaft end of the head shaft 4b, and FIG. 2B is a plan view showing the arrow A thereof. A concave groove 4c is formed on the end surface 4d of the head shaft 4b. The recessed groove 4c is formed in the end surface 4d of the head shaft 4b so as to be opened in the same direction as the rotational direction, and the guide roller 6 is disposed in the groove 4c via the rotating shaft 6a. The guide roller 6 is disposed so as to rotate in the same direction as the rotation direction (work pressing force direction) of the head shaft 4b. Further, the guide roller 6 is arranged eccentrically with respect to the head shaft 4b because the concave inclined surface 8b formed on the end surface 8b of the pusher 8 described later and the outer peripheral surface of the guide roller 6 are brought into contact with each other. This is because the direction of the urging force is converted to the rotation direction via the guide roller 6. According to such a configuration, the direction of the urging force can be reliably transmitted to the direction of the workpiece pressing force for conversion while achieving compactness in the radial direction of the shank 5.

  FIG. 2C is a cross-sectional view for explaining the detailed shape of the pusher 8. FIG.2 (d) is a top view which shows the B arrow view. As an example, the pusher 8 has a flange formed on one end face, and the urging force acts on the head shaft 4b side in the shank axis direction by urging means described later. The operation of the urging force converting means will be described later.

  FIG. 3A is a perspective view showing a specific configuration of the urging means and the urging force adjusting means. The urging means and the urging force adjusting means are provided in the same direction as the shank shaft. For this reason, it can comprise compactly in the radial direction of the shank 5, and can adapt to small diameter internal diameter processing. The urging means is constituted by a plurality of disc springs 16 as an example. This is because the necessary biasing force is secured by the disc spring 16 and various combinations are possible. Therefore, it is possible to obtain a biasing force that can be widely applied from iron-based materials such as carbon steel and stainless steel to non-ferrous materials such as copper and aluminum alloys. According to this configuration, in combination with the urging force conversion means, while being compact in the radial direction of the shank 5, it has not been conventionally applicable to small-diameter inner diameter processing (φ60 mm or less), but the inner diameter can be applied up to φ30 mm. Can do. Therefore, since one tool can be applied to various purposes without exchanging the tools and the processing range can be expanded, the setup time can be reduced.

  FIGS. 3B and 3C are cross-sectional views showing an example of the combination of the disc springs 16. In the present embodiment, in the case of an iron system such as carbon steel and stainless steel, as shown in FIG. 3 (b), five sets of disk springs 16 are stacked (in parallel), and five sheets are stacked alternately. Inverted and combined in series. On the other hand, in the case of a non-ferrous material such as copper / aluminum alloy, as shown in FIG. 3 (c), two disc springs 16 are stacked (in parallel), which are alternately inverted and combined in series. . Here, when the disc springs are used in parallel, the load constant of the spring is N times (N is the number of disc springs), and when used in series, the disc constant is 1 / N. On the other hand, the amount of deflection per unit load of the spring does not change in parallel, but N times in series. In this embodiment, it can be used in various combinations so as to obtain an appropriate load. According to such a configuration, it is possible to obtain a wide range of workpiece pressing force only by combining individual springs without replacing the springs.

  As an example, the biasing force adjusting means includes an adjusting bolt 12 and a thrust bearing 14. The adjustment bolt 12 is provided with a flange protruding from the shank 5 on the end face on the opening side of the shank 5, and a hole for adjusting the rotation of the adjustment bolt 12 is provided on the outer peripheral surface of the flange. For example, the adjustment bolt 12 can be rotated by inserting a tool or the like into the hole. In addition, knurling is also performed so that the fingers can be easily rotated when no load is applied or when they are loosened.

Next, the operation of the roller burnishing tool 10 according to the present embodiment will be described.
FIG. 1A shows a state during non-machining, and FIG. 1B shows a state during rolling. Here, as an example, the inner diameter machining is performed. Since the work pressing force does not act during non-machining in FIG. 1A, the urging force generated by the urging force generating means is transmitted to the outer peripheral surface of the guide roller 6 through the concave inclined surface 8b of the pusher 8. As a result, the head shaft 4b is rotated in the direction indicated by the arrow V in the figure, and the guide roller 6 is urged and held between the inner surface of the shank 5 and the concave inclined surface 8b of the pusher 8.

  On the other hand, since the workpiece pressing force acts during the rolling process in FIG. 1B, the head 4 receives the rotational force in the direction of arrow P in the figure as the reaction, and the head shaft 4b moves in the direction of the figure Q. Receiving power. The turning force is transmitted to the pusher 8 through the guide roller 6, and the pusher 8 receives a horizontal component force through the concave inclined surface 8b. Therefore, during the rolling process, the pressing force received by the workpiece and the urging force generated by the urging means are balanced, and the head shaft 4b is kept in a horizontal state, and the rolling process proceeds in a so-called floating state. As a result, it absorbs subtle fluctuations in the peaks and valleys caused by the surface roughness of the work surface of the workpiece, and the workpiece pressing force is controlled appropriately, so there is no waviness on the machining surface, which is good A smooth finish can be obtained. The urging force can be set and adjusted to an optimum urging force by the urging force adjusting means. Specifically, from experience, 1000 to 1400 (N) is suitable for iron-based materials such as soft iron, and 100 to 340 (N) is suitable for non-ferrous materials such as copper alloys. However, if adjustment is necessary due to differences in conditions such as the surface roughness of each material and pre-processing, the adjustment bolt 12 is used for adjustment.

  Furthermore, the operation of each component will be described. For example, the roller 2a is pressed and contacted with a rotating workpiece by a lathe or the like, and the roller 2a performs a rolling process while rotating. Since the adjustment bolt 12 is threaded on the lower outer peripheral portion of the collar and is fitted to the inner peripheral surface side of the shank 5 with a screw, the biasing force increases when the adjustment bolt 12 is rotated forward to advance. However, since the urging force is reduced by turning counterclockwise, the urging force can be adjusted to an optimum value. The thrust bearing 14 is provided in order to reduce the frictional resistance when adjusting the rotation of the adjusting bolt 12 and to enable smooth adjustment.

The embodiment that seems to be the best of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and can be implemented with appropriate modifications within the scope of the same technical idea. The contents will be described below.
FIG. 4 is a sectional view showing an embodiment of the urging force converting means in claim 1. The urging force conversion means described in claim 1 is not limited to the so-called guide roller system described in claim 2, and can also be implemented as follows. 4 (a) shows a head shaft 4b formed of an integral curved surface, FIG. 4 (b) shows a guide roller using a needle bearing, and FIG. 4 (c) shows a head shaft. In this configuration, steel balls and rollers are embedded in the inclined surface 4b. Note that these are examples, and should not be interpreted in a limited manner.
Moreover, in the roller 2a for rolling processing, this embodiment shows an example of a single type, and is not limited to this, and can be applied to various rollers. In this embodiment, a disc spring is used, but a coil spring may be used, a gas or hydraulic type may be used, and these may be used in combination. In the pusher 8, a flange is adopted in the present embodiment, but the pusher 8 is not limited to this, and may be a straight shape.

It is sectional drawing which shows the structure of the roller burnishing tool which is one Embodiment of this invention. It is sectional drawing which shows the specific structure of an urging | biasing force conversion means. (A) is a partially enlarged view of FIG. 1 showing the configuration of the shaft end of the head shaft, (b) is a plan view showing the arrow A, (c) is a cross-sectional view for explaining the detailed shape of the pusher, (D) is a top view which shows the B arrow. (A) is a perspective view which shows the concrete structure of a biasing means and a biasing force adjustment means, (b) and (c) are sectional drawings which show an example of the combination of a disc spring. It is sectional drawing which shows the Example of an urging | biasing force conversion means. It is sectional drawing which shows the structure of the conventional burnishing tool.

Explanation of symbols

1 Roller burnishing tool body 2 Roller unit 2a Roller 2b Needle bearing 2c Thrust bearing 2d Belleville spring 2e Roller pin 2f Cover 2g Hexagon socket countersunk bolt 2h Spacer 4 Head 4a Head body 4b Head shaft 4c Recessed groove 4d Head shaft end face 5 Shank 5a Slide bush 6 Guide roller 6a Rotating shaft 8 Pusher 8a Collar portion 8b Recessed inclined surface 9 Rotating shaft 10 Roller burnishing tool 12 Adjust bolt 14 Thrust bearing 16 Disc spring

Claims (3)

A cylindrical shank (5) to be mounted on a processing machine, and a head (4) that is installed in the shank (5) via a rotating shaft (9) and rotates by a workpiece pressing force. Roller burnishing tool body,
Urging means for urging the pusher (8) inserted into the cylindrical shank (5) in the axial direction of the shank (5);
Biasing force adjusting means for adjusting the biasing force generated by the biasing means;
Urging force conversion means for transmitting the urging force to the head shaft (4b) and converting the direction of the urging force into a rotation direction of the head shaft (4b);
A roller burnishing tool main body (1) characterized by controlling a work pressing force in the rotating direction generated during rolling. The urging force converting means is formed on the pusher side end surface of the head shaft (4b) of the head 4 provided through the rotating shaft (9), and is opened to the rotating direction and the pusher (8) side. A guide roller (6) disposed in the recessed groove (4c) formed in such a manner as to be rotatable in the rotation direction via a rotation shaft;
The urging force is transmitted to the head shaft (4b) by contacting and urging the concave inclined surface (8b) formed on the end surface of the pusher (8) on the head shaft (4b) side. The roller burnishing tool main body (1) according to claim 1, wherein the direction is changed to the rotation direction. A roller burnishing tool body (1) according to claim 1,
A rotatable roller unit (2) for rolling processing disposed on the head body (4a) of the head (4);
A roller burnishing tool (10) comprising:

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