JP4051054B2 - Roller burnishing tool for corner R surface machining - Google Patents

Description

  The present invention relates to a roller burnishing tool for rolling process, and more particularly to a roller burnishing tool that enables corner R surface machining by tool rotation in addition to workpiece rotation.

Generally, the processed surface of the cutting process has a certain limit in surface roughness and forms so-called peaks and valleys. Therefore, problems occur in terms of functions such as mechanical strength, and the beauty of the appearance is also impaired. Therefore, a roller burnishing process is performed after the cutting process, and the surface roughness is greatly improved to finish a smooth surface like a mirror.
The principle of roller burnishing is a kind of plastic working method, in which a metal surface is rolled with a roller to crush a “mountain portion” and finish the processed surface smoothly. Unlike grinding, the surface roughness is improved in a short time, and the surface is work hardened. Therefore, the machined surface has improved mechanical strength and is excellent in durability and wear resistance.
By the way, there are two types of roller burnishing processes: a workpiece rotation method and a tool rotation method. In the former, the work is mounted on a processing machine such as an NC lathe and rotated, the roller of the roller burnishing tool is pressed against the rotating work, and the roller is pressed to perform burnishing. The latter is a tool Is mounted on a processing machine such as a machining center and rotated, and the rotating tool is pressed against a work and is burned while being pressed by a roller.
Depending on the number of rolling rollers for one processing surface, there are two types, a single roller type using one roller for one processing surface and a multi-roller type using a plurality of rollers for one processing surface.
In general, roller burnishing uses special tools depending on the shape of the workpiece and the shape of the work surface such as the flat surface, inner diameter, outer diameter, R surface, and spherical surface. For example, Japanese Utility Model Laid-Open No. 4-118969 for processing the inner surface of a sphere and Japanese Patent Application Laid-Open No. 3-65658 for processing a flat end surface are available.

FIG. 7 is a perspective view showing a conventional roller burnishing tool for processing the outer peripheral R surface.
As shown in FIG. 7, the conventional burnishing tool 30 uses a single roller type in the stepped corner R surface processing of the outer peripheral surface, and the burnishing processing of the R processing surface is performed by rotating the workpiece.
Japanese Utility Model Publication No. 4-118969 Japanese Utility Model Publication No. 3-65658

However, depending on the shape of the workpiece, such as when the surface to be machined deviates from the rotation center, and the type of machine used, such as a machining center, the workpiece may not be rotated, and there is a problem that roller burnishing cannot be performed.
The present invention has been developed under such a background, and an object thereof is to provide a roller burnishing tool capable of processing a corner R surface by rotating a tool in addition to rotating a workpiece.

The invention according to claim 1 is a disk-shaped roller for rolling process provided at a front end of a tool, a shank for mounting on a processing machine, the roller is rotatable, and an R shape of a processing surface The retainer is inclined at a preset angle with respect to the shaft of the shank, and is accommodated so as to be movable along the inclined direction, the retainer is rotatable on an inner peripheral surface, and the shank A cylindrical mandrel that is slidably held in the axial direction of the roller, is formed with a substantially "U" -shaped recess so as to accommodate the outer periphery of the roller, and is rotatable integrally with the shank; A cylinder having a first biasing means provided in the mandrel for biasing the retainer containing the roller forward of the shank axial tool and disposing the roller in front of the recess of the mandrel. Outer step corner A roller burnishing tool for surface machining, wherein the retainer is retracted by pressing the roller against the cylindrical outer periphery stepped portion, which is a workpiece, so that the roller is in the shape of a recess formed in the mandrel. A mechanism for adjusting a tool machining diameter by moving along the tool is provided, and rolling is performed while holding the roller rotating in the recess.
Here, the “mandrel” means a retainer, a roller, and the like that are attached to the processing machine via a shank. In addition to an integral structure, a “mandrel” includes a split structure as shown in the embodiment.

  The invention according to claim 2 is a disk-shaped roller for rolling process provided at the front end of a tool, a shank for mounting on a processing machine, the roller being rotatable, and an R shape of a work surface The retainer is inclined at a preset angle with respect to the shaft of the shank, and is accommodated so as to be movable along the inclined direction, the retainer is rotatable on the outer peripheral surface, and the shank Holds the mandrel that can be slidably held in the axial direction, has a substantially "U" shape recess so that the outer periphery of the roller can be received, and can rotate integrally with the shank, and the roller A cylindrical inner peripheral step portion that urges the retainer forward in front of the shank axial tool and first urging means that is fitted in the mandrel and that is disposed in front of the recess of the mandrel. Corner radius A roller burnishing tool for use in the above process, wherein the retainer retreats by pressing the roller against the cylindrical inner peripheral step portion which is a workpiece, and the roller follows the shape of the recess formed in the mandrel. And a mechanism for adjusting the tool machining diameter by moving the roller, and rolling with the roller rotating in the recess.

  The invention according to claim 3 is the roller burnishing tool for processing the outer periphery of the cylindrical outer periphery or the inner peripheral step corner R of the first or second aspect, wherein the retainer is formed in a cylindrical shape, The front end portion is provided with a concave groove inclined at the predetermined angle, and the roller is accommodated in the groove so as to be rotatable and movable along the concave groove. And a roller receiver fixed to the mandrel so as to be held between the retainer and the retainer.

  The invention according to claim 4 is the roller burnishing tool for cylindrical outer periphery or cylindrical inner peripheral step corner R surface processing according to any one of claims 1 to 3, wherein the mandrel includes the shank. The mandrel is configured to be relatively movable in the axial direction of the shank, and the mandrel is urged in the axial direction of the shank in the roller direction so as to control the processing pressing force during the rolling process. The urging means is provided.

  A fifth aspect of the present invention is a roller burnishing tool for machining a cylindrical outer periphery or a cylindrical inner peripheral step corner R surface according to any one of the first to fourth aspects, for the rolling process. It is characterized in that at least three rollers are provided at predetermined intervals on the retainer.

  According to the first aspect of the present invention, there is provided a roller burnishing tool for cylindrical outer peripheral step corner R surface machining capable of performing tool rotation burnishing and adjusting a tool machining diameter in addition to workpiece rotation. Can do.

  According to the second aspect of the present invention, there is provided a roller burnishing tool for machining the inner peripheral corner portion of the round corner of the cylinder capable of adjusting the tool machining diameter in addition to the workpiece rotation and the tool rotation burnishing. be able to.

  According to the invention of claim 3, since the retainer is provided with the concave groove and is held so as to be sandwiched between the roller receiver, the tool machining diameter can be adjusted while rotating the roller stably. It is possible to provide a roller burnishing tool for machining a cylindrical outer periphery or a cylindrical inner peripheral step corner R surface.

  According to the invention of claim 4, since the second urging means for controlling the processing pressing force is provided, it is possible to absorb a variation in the pre-processing such as the surface roughness of the workpiece and obtain a good finished surface. It is possible to provide a roller burnishing tool for machining the outer periphery of the cylinder or the inner peripheral step corner R surface.

  According to the invention according to claim 5, since a plurality of rollers are used, the work pressing force on the workpiece is well balanced, and even when the workpiece has a small outer diameter, the deflection of the workpiece can be prevented. A smooth finished surface, and even if there is a misalignment of the workpiece, if it is within a certain range, a good finished surface can be secured, and the operation can be simplified and the machining time can be shortened. It is possible to provide a roller burnishing tool for machining a cylindrical inner peripheral step corner R surface.

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 for machining a cylindrical outer peripheral step corner R surface according to the first embodiment of the present invention.
As shown in FIG. 1, the roller burnishing tool 1 according to this embodiment includes a shank 3 for mounting on a processing machine such as a lathe. The shank 3 is comprised by the taper-shaped insertion part 3a and the cylindrical main-body part 3b as an example. The tapered insertion portion 3a is a Morse taper for mounting on a chuck or the like of a processing machine such as an NC lathe. On the other hand, since an urging means, a mandrel, a retainer 6 and the like which will be described later are accommodated in the cylindrical main body 3b, one end is opened and the other end is closed.

In this embodiment, the roller burnishing tool 1 for corner R surface machining includes three rollers 5 for rolling compaction at equal intervals on the circumference.
In this embodiment, the roller 5 is provided with an inclination angle of 45 degrees with respect to the axis of the shank 3. This is because the roller 5 is disposed in the normal direction with respect to the R surface of the cylindrical outer peripheral step corner of the workpiece.
As an example, the roller 5 is accommodated in a groove of a retainer 6 to be described later, and is held between the retainer 6 and the roller receiver 8 at the inclination angle. The retainer 6 is held by being urged to the roller receiver 8 via the roller 5 by the first urging means described later.
The roller 5 is formed in a flat disk shape (see FIGS. 2 and 4), and has a tip portion (outer peripheral tip portion) having a mountain-shaped cross section so that the outer peripheral surface projects outward. This outer peripheral tip 5a is a contact surface with the work surface of the workpiece, and its shape is determined according to the stepped corner R surface of the workpiece.
In the present embodiment, the number of rollers is three, but can be appropriately determined according to the outer dimensions of the workpiece. Thus, by arranging the rollers 5 in a balanced manner with respect to the workpiece, even if there is a misalignment with the workpiece, smooth machining is possible within the adjustment range of the tool machining diameter described later, Further, the processing time can be shortened by processing with a plurality of rollers in a well-balanced manner, and the operation is easy because the processing is performed so as to be wrapped with the plurality of rollers.

Here, with reference to FIG. 2 and FIG. 3, each component accommodated in the shank main-body part is demonstrated. 2 is a partially enlarged cross-sectional view of FIG. 1, and FIG. 3 is a schematic diagram showing the shape of the retainer.
As shown in FIGS. 2 and 3, the retainer 6 has a cylindrical shape composed of an inner peripheral surface and an outer peripheral surface (see FIG. 3). This inner peripheral surface is a space into which a workpiece is inserted. As an example, a flange portion 6a is formed on the outer peripheral surface on the tool front side (roller side). An inclined surface 6b is formed on the outer peripheral side of the front end of the collar portion 6a at an angle of 45 degrees with respect to the shank shaft, and a concave groove 6c in which the roller 5 is accommodated is formed on the inclined surface 6b. The roller 5 accommodated in the concave groove is rotatably held and is configured to be movable in the groove direction (see FIG. 4).
The concave groove 6c is opened with a groove width narrowed in an arc shape on the front end side of the collar portion 6a of the retainer 6. The reason why the groove width is narrow is that the roller 5 enters and moves in the groove, but stops at this arc-shaped portion so as not to come out.
A front thrust ring 10b, which will be described later, is fitted in the rear end side step portion 6d of the outer peripheral surface of the retainer 6, and the retainer 6 is moved forward of the tool by the first biasing means 10 disposed behind the front thrust ring 10b. The roller 5 is clamped together with the roller receiver 8.

The roller receiver 8 is formed in a cylindrical shape having a narrow bottom with the front end side closed, and the rear end side is, for example, threaded on the inner peripheral surface and screwed into the mandrel main body 14 and fixed. Is located at the front edge of the tool.
A hole that is in close contact with the roller 5 is formed in the central portion of the closed end surface of the front end of the roller receiver 8, and the inner peripheral surface of this hole is cut obliquely in accordance with the inclination angle of the roller 5. It has a triangular slope. By this slope, the roller 5 accommodated in the concave groove 6 c of the retainer 6 is configured to be sandwiched between the retainer 6.

  As an example, the first biasing means 10 includes a coil spring 10a, thrust rings 10b and 10c on both sides thereof, and a thrust bearing 10d. The first urging means 10 is disposed at the rear portion of the retainer 6 and urges the retainer 6 in which the roller 5 is accommodated to the roller receiver 8 by a coil spring 10a via a front thrust ring 10b. 5 is held between the retainer 6 and the roller receiver 8 so as to be held.

  In the present embodiment, the mandrel is divided into a mandrel head 12 and a mandrel body 14. In the mandrel head 12, a portion that contacts the roller 5 for rolling process is formed in a cross-section “U” shape, and the tool machining diameter is reduced by the retreat of the roller 5. Then, because the roller 5 rolls in this state, the mandrel head 12 becomes a consumable item and needs to be replaced.

Here, the configuration of the “mechanism for adjusting the tool machining diameter” described in claim 1 will be described.
The mechanism for adjusting the tool machining diameter includes the first urging means 10, the retainer 6, the roller receiver 8, the roller 5, and a mandrel head 12 (including a mandrel main body 14 when the mandrel is integrated). Configured.
The mandrel head 12 has a thin cylindrical shape with a short width, and is inserted into a tip portion of the mandrel main body 14 and is prevented from rotating by a stop screw 13 so as to rotate integrally with the mandrel main body 14.
The mandrel head 12 is provided with a concave portion 12a having a substantially “C” -shaped cross section at the corner portion on the inner peripheral surface front end side, and the outer peripheral front end portion 5a of the roller 5 in front of the concave portion 12a (the front end side of the tool). Are arranged in contact with each other.
Specifically, the mandrel head 12 is disposed with its front end in contact with the roller receiver 8, and the roller 5 held by the retainer 6 is attached to the roller receiver 8 by the first urging means 10. Therefore, it is configured to be positioned in front of the recess 12a of the mandrel head 12.
A retainer 6 is held on the inner peripheral surface side of the mandrel head 12 so as to be rotatable and slidable in the axial direction of the shank 3.

  The mandrel main body 14 has a long and thin cylindrical shape, and an outer peripheral surface thereof is inserted into an inner peripheral surface of the main body portion 3b of the shank 3. On the inner peripheral side, the first biasing means 10 is provided. The mandrel head 12 and the roller receiver 8 are arranged on the front end side.

A step portion is formed at the inner peripheral rear end portion of the mandrel main body 14, and one end of the coil spring 10a, which is the second urging means 16, contacts the step portion, and the other end of the shank main body 3b. It is disposed in contact with the inner peripheral closing side end surface and generates a bullet urging force. The elastic urging force acting on the mandrel is latched and held by a rotation stop pin 19 coupled to the shank 3.
The second urging means 16 bears a workpiece pressing force during the rolling process, and generates a larger urging force than the first urging means 10. Therefore, as an example, in the present embodiment, a coil spring having a rectangular cross section that easily generates a large urging force is used.

In the roller burnishing tool 1, the shank 3 and the mandrel main body 14 are coupled together by a rotation stop pin 19 so that the shank 3 and the mandrel main body 14 and the like can rotate together.
However, the mandrel main body 14 is formed with a long hole in the shank 3 so that it can slide in the axial direction of the shank 3 together with the roller 5 by the action of the second urging means 16 during the rolling process. Has machined a round hole and inserted a rotation stop pin 19 therein to couple them together.

The roller burnishing tool 1 includes a cover 18 on the outer peripheral surface of the main body 3b of the shank 3 in order to cover the slide mechanism of the mandrel main body 14.
A scale can also be displayed on the cover 18. Then, the amount of movement when the processing pressing force acts and the mandrel main body 14 moves can be measured.

Next, with reference to FIG. 5, the operation of the roller burnishing tool 1 for machining the cylindrical outer peripheral step corner R surface according to the present embodiment will be described.
FIG. 5 is an enlarged cross-sectional view around the roller 5 in FIG. 2, FIG. 5 (a) shows a state before burnishing, and FIG. 5 (b) shows a state during burnishing.
Here, as an example, the case of tool rotation is shown, and the workpiece W is fixed to a bed or the like of a processing machine such as a machining center, and the tool 1 is mounted on the rotating shaft of the processing machine via the shank 3. .
In the case of tool rotation, a mandrel body 14 that is rotationally driven via a shank 3 that is rotated by a processing machine, and a cylindrical outer peripheral portion of a workpiece W that is stationary while the roller 5 rolls as the mandrel head 12 rotates. Revolves around and rolls.

The roller burnishing tool 1 according to the present embodiment has a function of adjusting the tool processing diameter φD from the maximum to the processing diameter of the surface to be processed by the “mechanism for adjusting the tool processing diameter”.
As shown in FIG. 5A, the roller 5 is not in contact with the stepped portion Wa of the workpiece W before processing. Therefore, the roller 5 is urged and held by the first urging means 10 through the retainer 6 to the roller receiver 8, and in this state, the roller 5 can freely move along the inclined surface of the roller receiver 8. It can move (R arrow direction).
Therefore, the “tool machining diameter adjusting mechanism” functions to release the tool machining diameter φD when inserting the roller 5 into the workpiece W. For this reason, it becomes easy to insert the tool 1 into the workpiece W.

Next, from this state, the processing machine gives a forward feed to the tool 1 and feeds the tool 1 forward. Then, since the outer peripheral tip 5a of the roller 5 abuts against the stepped portion Wa of the workpiece and receives a reaction force that resists the thrust in the feed direction, the reaction force overcomes the urging force of the first urging means 10. The retainer 6 is moved backward to the tool. That is, the roller 5 moves away from the roller receiver 8 while being accommodated in the groove of the retainer 6 to a position where the roller 5 is sandwiched between the processed portion Wb and the concave portion 12a of the mandrel head 12.
Since the urging force by the second urging means 16 acting on the mandrel head 12 is set to be larger than the urging force by the first urging means 10, the mandrel head 12 is retracted before the retainer 6. There is nothing.
In this way, when the roller 5 is sandwiched between the workpiece Wb and the recess 12a of the mandrel head 12, the roller 5 is stably held rotatably. That is, the forward movement of the roller 5 is regulated by being sandwiched between the workpiece W and the recess 12 a of the mandrel head 12, and the backward tilt is supported and regulated by the retainer 6. Since the tip of the roller 5 has reached the workpiece workpiece Wb, this position is the machining diameter of the workpiece surface, and the tool diameter φD is minimized (see FIG. 5B).
When the roller 5 is retracted to this position, the processing pressing force is received from the concave portion 12a of the mandrel head 12 from that point, and the second urging means 16 supports the mandrel head 12 against this reaction force. Thus, the mandrel head 12 is held at a position where the biasing force by the second biasing means 16 and the processing pressing force are balanced (see FIG. 2).

From this state, burnishing is started.
As described above, the processing thrust (processing pressing force) that presses the workpiece is balanced with the urging force of the second urging means 16 (see FIG. 2). An appropriate feed is given to the tool, the processing pressing force is set to an appropriate value, and burnishing is started. For example, when the workpiece outer diameter is about φ10 mm, the processing pressing force is suitably about 1.0 to 2.0 kN (spring deflection is about 1.3 to 2.6 mm).
When the tool 1 is rotated by the processing machine, the outer peripheral surface of the workpiece W is revolved while rolling while the roller 5 is pressed on the surface to be processed, and burnishing is performed.
Then, after finishing the burnishing, the tool 1 is moved backward from the workpiece W while the tool 1 is rotated, and the work is finished.
In the case of workpiece rotation, when the workpiece W is pressed by the processing machine, the roller 5 rolls with the rotation of the workpiece W and revolves around the cylindrical outer peripheral portion of the workpiece. In this case, the revolving roller 5 is held by a recessed mandrel recess apex 12b. Therefore, the roller burnishing tool 1 according to the present invention can be applied not only to the work rotation but also to the tool rotation.

  As described above, in the burnishing tool 1, the tool machining diameter is adjusted to match the surface to be machined by the function of the “mechanism for adjusting the tool machining diameter”. Therefore, even if there is a slight misalignment of the workpiece, it can be absorbed by the tool as long as it is within this adjustment range, and the burnishing process can proceed normally. Therefore, the operation of the tool is easy and the working time can be shortened.

  Next, with reference to FIG. 6, the roller burnishing tool for machining the inner peripheral corner portion R surface of the cylinder according to the second embodiment of the present invention will be described. In FIG. 6, parts common to the roller burnishing tool 1 for processing the cylindrical outer peripheral step corner R surface according to the first embodiment of the present invention are given the same reference numerals, and redundant description is omitted.

A roller burnishing tool 1 ′ for machining a cylindrical inner peripheral step corner R surface according to the second embodiment of the present invention is different from a roller burnishing tool 1 ′ for processing an outer peripheral surface, and a roller 5 ′ for rolling processing is attached to the shank shaft. Thus, the front side is inclined 45 degrees clockwise so as to open outward. This is because the roller 5 ′ is arranged in the normal direction to the corner R surface of the inner circumferential step portion of the workpiece.
For this reason, the relative positional relationship between the retainer 6 ′, the roller receiver 8 ′, and the mandrel head 12 ′ and the roller 5 ′ is different from that for processing the outer peripheral surface.
That is, the mandrel head 12 'has a "U" -shaped recess 12a' on the front end side of the outer peripheral surface thereof, and is configured such that the outer peripheral tip of the roller 5 'is positioned in front of the recess.
The retainer 6 ′ is rotatably fitted on the outer peripheral surface of the mandrel head 12 ′, and has a concave groove inclined at the predetermined angle at the front end thereof, and the roller 5 ′ is rotatable in the concave groove, and It is accommodated so as to be movable in the groove direction. A flange is formed on the rear end side of the retainer 6 ′, and a coil spring 10 a ′ is disposed on the end surface of the retainer 6 ′ via a front spring guide 10 b ′ constituting the first urging means 10 ′.
Therefore, although the positional relationship is different, the roller 5 'is held between the roller receiver 8' by urging the retainer 6 'containing the roller 5' to the roller receiver 8 'by the first urging means 10'. Is the same as the tool 1 for processing the outer peripheral surface.
The roller receiver 8 'is formed in a disk shape, and its outer peripheral surface is configured to have a tapered surface of 45 degrees with respect to the shank shaft in order to hold the roller 5'.
The roller receiver 8 'is fixed to the front end of the mandrel head 12' with a fixing screw 8a 'so as to sandwich the roller 5' from the opposite side of the retainer 6 'with the roller 5' interposed therebetween.

Since the roller burnishing tool 1 ′ for processing the inner peripheral step corner R surface of the cylinder is different from the one for processing the outer peripheral surface, the first biasing means 10 ′ is exposed on the outer peripheral surface of the mandrel head 12 ′. A spring cover 18a 'for covering the first urging means 10' is provided. The spring cover 18a ′ is formed in a bottomed cylindrical shape, and a bottom surface is formed on the front end side so as to cover the flange surface of the retainer 6 ′. The bottom surface is provided with a hole portion into which the outer peripheral surface of the retainer 6 'can be inserted. On the other hand, the rear end side of the spring cover 18a 'is threaded on its inner peripheral surface, and is screwed and fixed to the mandrel body 14'.
The mandrel head 12 ′ and the mandrel body 14 ′ are integrally connected with the fixing screw 13 in the same manner as the outer peripheral surface tool.

Finally, “control of processing pressing force” will be described.
As described above, during the burnishing process, the horizontal component of the workpiece pressing force is balanced with the urging force generated by the second urging means 16, and the process proceeds.
Therefore, a biasing force is generated by the second biasing means so as to absorb a subtle variation of the so-called “mountain and valley” on the workpiece surface, and as a result, the processing pressing force is controlled.

The best embodiment 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.
In the present embodiment, the retainer 6 has a shape in which a collar is formed on the outer peripheral surface. However, the present invention is not limited to this, and a configuration in which the collar portion is integrated with the outer peripheral surface and the outer peripheral surface is a straight shape is also employed. In short, an appropriate shape can be adopted from the viewpoint of the balance between the dimensions of the tool and the strength required to hold the space surface and the roller 5.
Further, in this embodiment, the roller is configured such that the vertical wall of the side surface formed in the retainer is accommodated in the concave groove having a vertical “C” -shaped cross section, but the present invention is not limited to this. Therefore, the vertical wall shape of the groove may be an arc shape or a triangular shape.
Further, in the invention according to claim 1 or 2, it is sufficient that the roller can be held at a predetermined angle with respect to the shank shaft, and can be rotated and moved in the inclined direction. May be held rotatably by a pin, and the pin may be held movably along the inclined surface.
In the first urging means 10 and the second urging means 16, a coil spring is used in the present embodiment, but a disc spring may be used, or these may be combined. Also, hydraulic pressure or the like may be used.
In the present embodiment, the mandrel adopts a divided structure, but may be integrated. In addition, in the present embodiment, the shape of the concave portion of the mandrel is approximately a “shape”, but is not limited thereto. The tool machining diameter can be adjusted, and any shape can be used as long as the mandrel and the workpiece are sandwiched and stably held.
In this embodiment, the roller receiver is configured as one component. However, the roller receiver may be integrated with the mandrel head, and even if the roller receiver is fixed to the retainer, the roller receiver of the invention according to claim 1 or 2 may be used. Belongs to the technical scope.

It is sectional drawing which shows the structure of the roller burnishing tool which concerns on the 1st Embodiment of this invention. It is the elements on larger scale of FIG. It is a schematic diagram which shows the shape of the retainer in the roller burnishing tool which concerns on the 1st Embodiment of this invention. It is a perspective view which shows the state in which the roller was accommodated in the retainer in the roller burnishing tool which concerns on the 1st Embodiment of this invention. It is an expanded sectional view for demonstrating the effect | action of the roller burnishing tool which concerns on the 1st Embodiment of this invention, (a) shows the state before a process, (b) shows the state in process. It is a partial expanded sectional view which shows the structure of the roller burnishing tool which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the external appearance of the conventional burnishing tool.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Roller burnishing tool 3 Shank 3a Insertion part 3b Body part 5,5 'Roller 5a Outer peripheral edge part 6,6' Retainer 6a Collar 6b Inclined surface 6c Concave groove 6d Step part 8, 8 'Roller receiver 10, 10' 1st Urging means 10a, 10a 'coil spring 10b forward thrust ring 10b' forward spring guide 10c rear thrust ring 10d, 10d 'thrust bearing 12, 12' mandrel head 12a, 12a 'recess 12b recess apex 12c recess forward 13 stop Screws 14, 14 'Mandrel body 16 Second urging means 18 Cover 18a' Spring cover D Tool machining diameter W Work Wa Work step Wb Worked part

Claims (5)

A disk-shaped roller for rolling processing provided at the front end of the tool, a shank for mounting on a processing machine,
A retainer that accommodates the roller so as to be rotatable and tilted at a preset angle with respect to the shank axis in accordance with the R shape of the surface to be machined, and movable along the tilt direction;
The retainer is rotatably held on the inner peripheral surface and is slidable in the axial direction of the shank, and a substantially "U" shaped recess is formed so as to accommodate the outer peripheral portion of the roller, A cylindrical mandrel that can rotate together with the shank;
A cylinder having a first biasing means provided in the mandrel for biasing the retainer containing the roller forward of the shank axial tool and disposing the roller in front of the recess of the mandrel. A roller burnishing tool for processing the outer peripheral corner R surface,
By pressing the roller against the cylindrical outer peripheral step which is the workpiece, the retainer moves backward, and the roller moves along the shape of the recess formed in the mandrel, thereby adjusting the tool machining diameter. A roller burnishing tool for processing a cylindrical outer peripheral step corner R surface, wherein the roller is rotated while being held in the concave portion. A disk-shaped roller for rolling processing provided at the front end of the tool, a shank for mounting on a processing machine,
A retainer that accommodates the roller so as to be rotatable and tilted at a preset angle with respect to the shank axis in accordance with the R shape of the surface to be machined, and movable along the tilt direction;
The retainer is rotatably held on the outer peripheral surface and is slidable in the axial direction of the shank, and a concave portion having a substantially "<" shape is formed so as to accommodate the outer peripheral portion of the roller. A mandrel that can rotate together with
A cylinder having a first urging means fitted into the mandrel for urging the retainer containing the roller in front of the shank axial tool and disposing the roller in front of the recess of the mandrel. A roller burnishing tool for machining the inner peripheral corner R surface,
By pressing the roller against the cylindrical inner peripheral step which is a workpiece, the retainer moves backward, and the roller moves along the shape of the recess formed in the mandrel, thereby reducing the tool machining diameter. A roller burnishing tool for machining a cylindrical inner circumferential corner R surface, comprising a mechanism for adjusting, and rolling while holding the roller rotating in the recess. The retainer is formed in a cylindrical shape, and includes a concave groove with the predetermined angle inclined at a front end thereof, and the roller is accommodated in the groove so as to be rotatable and along the concave groove. Keep it movable,
The cylindrical outer periphery or the cylindrical inner peripheral step corner R according to claim 1 or 2, further comprising: a roller receiver fixed to the mandrel so as to sandwich the roller with the retainer. Roller burnishing tool for surface machining.   The mandrel is configured to be movable relative to the shank in the axial direction of the shank, and urges the mandrel in the axial direction of the shank in the roller direction so that during the rolling process, The roller burnishing tool for machining a cylindrical outer peripheral or cylindrical inner peripheral step corner R surface according to any one of claims 1 to 3, further comprising a second urging means for controlling the pressure. .   The cylindrical outer periphery or cylinder according to any one of claims 1 to 4, wherein at least three rollers for the rolling process are provided at predetermined intervals in the retainer. Roller burnishing tool for machining the inner peripheral corner R surface.

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