JPH1177526A - Burnishing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently remove chips at the time of pre-processing. SOLUTION: A holder member 1 is mounted onto the tool rest of a NC lathe and the base end portion of a roller member 2 is rotatably supported with the holder member 1. An annular pressing part 5 is projected outward in the radial direction out of the outer circumferential surface of the roller member 2. A holder passage 6a is formed in the inside of the holder member 1, and a roller passage 6b is formed in the inside of the roller member 2. Let cutting lubricant C fed to the holder passage 6a be jetted out of an outlet path 8 by way of the roller passage 6b, the burnishing area B of a work W is thereby cleaned by jetted out cutting lubricant C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for burnishing a work with a roller member.

[0002]

2. Description of the Related Art A burnishing apparatus of this type is disclosed in Japanese Patent Application Laid-Open No. Sho 60-29272. In the prior art, a roller member is rotatably supported by a holder member, and an annular pressing portion provided at a tip end portion of the roller member is pressed against a pre-processed work by turning or the like to perform burnishing. Was.

[0003]

However, if foreign matter such as chips remains on the pre-processed surface after the above-mentioned pre-processing, the remaining foreign material will burnish the pre-processed surface when performing the burnishing process in the next step. An indentation is generated by biting into the area. For this reason, conventionally, a series of operations has been performed in the following procedure. When the pre-processing of the work is completed, the machine tool is first stopped and the work is removed, then the removed work is manually cleaned with a cleaning liquid or the like, and then the cleaned work is attached to the machine tool for burnishing. Was. In another conventional procedure, in order to omit the step of attaching and detaching the work to and from the machine tool, when the pre-machining of the work is completed, the machine tool is first stopped, and then the work is performed while the work is mounted on the machine tool. A cleaning liquid is manually sprayed on the pre-processed surface of the work to clean the work, and thereafter, burnishing is performed.
As a result, even if any of the above procedures are used, the cleaning work is troublesome and the machine tool has a long time loss. An object of the present invention is to propose a new device for improving the above problems.

[0004]

In order to achieve the above object, the invention of claim 1 is, for example, shown in FIG. 1 and FIG. 2 or FIG.
As shown in FIGS. 6 to 6, the burnishing device is configured as follows. A roller member 2 rotatably supported by a holder member 1 and an annular pressing portion 5 protruding radially outward from an outer peripheral surface of a tip end portion of the roller member 2.
And a flow path 6 formed in at least one of the inside of the holder member 1 and the inside of the roller member 2,
The burnishing area B to which the above-mentioned pressurizing section 5 contacts can be cleaned by the fluid C ejected from the outlet passage 8 (9) of the flow passage 6.

The invention of claim 1 is used as follows, for example, as shown in FIGS. First, a workpiece W attached to a machine tool is pre-processed by turning or the like, and subsequently, the workpiece W is rotated around an axis A at a predetermined speed while being attached to the machine tool. The cleaning fluid C such as cutting oil is supplied to the flow path 6 while the roller member 2 is advanced to the work W by 1. Then, the fluid C such as the cutting oil jetted from the outlet passage 8 of the flow path 6 is burned into the burnishing area B of the work W (here, the peripheral surface of the cylindrical hole 10).
Therefore, foreign matter such as chips is blown out of the work W by the fluid C to start cleaning.

Subsequently, burnishing is performed on the work W while performing the above-described cleaning. That is, when the roller member 2 is advanced to bring the pressurizing portion 5 into contact with the rotating burnishing region B, the pressurizing portion 5 is driven to rotate, and the burnishing region B is cleaned by the fluid C to a predetermined degree. Burnishing is performed with the pressing force F. In order to strongly and sufficiently clean the work W pre-processed by turning or the like, the work W is firstly cleaned only by the above-mentioned fluid without burnishing, and thereafter, the above cleaning is performed. The burnishing process may be performed.

The first aspect of the present invention has the following effects. As described above, according to the present invention, the cleaning channel is provided in the component member of the burnishing device, and the pre-processed surface of the workpiece can be cleaned by the fluid ejected from the outlet of the channel, so that the workpiece is manually processed. As compared with the above-described conventional example which requires a cleaning step, the cleaning work is not troublesome. In addition, the present invention
Since there is no need to stop the machine tool during the cleaning operation, the loss time of the machine tool is also small. Furthermore, in the present invention, since the cleaning flow path is provided inside the burnishing device, it is possible to prevent the cleaning pipe from protruding to the outside and interfere with the work, and to easily burnish even a small-diameter hole surface. . In addition, since the cleaning pipe and the blowing nozzle can be omitted, the burnishing device can be made small and simple.

In the present invention, it is preferable that the outlet passage 8 (9) of the flow passage 6 be opened toward the outer peripheral space S of the pressurizing section 5. According to the second aspect of the present invention, a large amount of cleaning fluid can be supplied to the processing surface before the pressing portion 5 contacts, so that the burnishing area B can be reliably cleaned. Also,
According to the second aspect of the present invention, the outlet path 8 (9) is arranged obliquely with respect to the axis X of the roller member 2, so that when the roller member 2 is driven and rotated during burnishing, the outlet path is formed. The path 8 (9) is rotated around the axis X so as to describe a conical side surface. Therefore, the burnishing area B can be cleaned over a wide area by the fluid ejected from the outlet passage 8 (9).

The flow path 6 may be formed in at least one of the holder member 1 and the roller member 2. However, since the roller member 2 is configured to rotate with respect to the holder member 1, in order to simplify the structure for supplying the cleaning fluid, as described in the inventions of claims 3 to 5, It is preferable that the flow path 6 be formed over the holder member 1 and the roller member 2 or formed only on the holder member 1. Further, in order to efficiently spray the cleaning fluid onto the burnishing area of the work, the outlet path 8 of the flow path 6 is connected to the roller member as described above. It is preferable to make an opening at the tip of the second member or the tip of the holder member 1.

[0010]

FIG. 1 and FIG. 2 show a first embodiment of the present invention. FIG. 1 is a longitudinal sectional view of the burnishing device. FIG. 2 is an enlarged sectional view of a main part in FIG. The work W is supported on a chuck (not shown) of the NC lathe in a cantilever manner, and is rotated around the axis A. The holder member 1 of the burnishing device is a tool post of the NC lathe.
(Not shown) so as to be reciprocated along the axis A at a predetermined moving speed.

The right half (base) of the rod-shaped roller member 2 is rotatably supported by a plurality of radial bearings 3 and 4 in the cylindrical hole 1a of the holder member 1. An annular pressing portion 5 is provided on the outer peripheral surface of the left end portion (tip portion) of the roller member 2.
Are integrally protruded outward in the radial direction.

A flow path 6 for cutting oil (fluid for cleaning) C is formed between the inside of the holder member 1 and the inside of the roller member 2. More specifically, the flow path 6 includes a holder flow path 6a formed in the right part of the holder member 1 and a roller flow path 6b formed in the roller member 2 so as to extend in the axial direction. The connecting portion between the holder flow path 6a and the roller flow path 6b is sealed by a seal 7.

As shown mainly in FIG. 2, an outlet passage 8 constituting the terminal end of the roller passage 6b is formed obliquely with respect to the axis X of the roller member 2 so that the left end of the roller member 2 It is opened on the outer peripheral surface of the part (tip part). Thereby, the outlet path 8 is directed to the outer peripheral space S of the pressurizing section 5.

More specifically, the burnishing device is configured as follows. The outer diameter D of the pressing unit 5 is set to about 14 mm, and the pressing unit 5
Is set to about 0.5 mm. Further, by pressing the roller member 2 into the cylindrical hole 10 of the work W via the holder member 1, about 100 kgf (about 980 N) is applied from the pressing portion 5 of the roller member 2 to the cylindrical hole 10. The burnishing pressure F acts. And
When the rod-shaped roller member 2 is considered as a cantilever, the elastic characteristics of the roller member 2 are set as follows. That is, when a reaction force corresponding to the above-mentioned pressing force F of 100 kgf is applied to the pressing portion 5 which is a free end, the elastic deformation of the roller member 2 (and the ball of the radial bearings 3.4) is performed. The pressure section 5 is set to bend by about 0.05 mm due to the above-mentioned distortion.

The above burnishing device is used as follows. First, the work W is rotated at a high speed around the axis A at a predetermined speed, and the cylindrical hole 10 is pre-processed in the work W by a cutting tool (not shown) such as a cutting tool. Subsequently, the work W is rotated at a low speed, and cutting oil is supplied to the flow path 6. In this state, the roller member 2 is inserted into the cylindrical hole 10 by the holder member 1, and The roller member 2 is reciprocated at a gentle speed with a predetermined gap formed in the peripheral surface of the hole 10. As a result, the cutting oil C is strongly sprayed from the outlet path 8 onto the peripheral surface of the cylindrical hole 10 rotating around the axis A, and the cutting oil C is used to cut chips during pre-processing. To the outside of the Thereafter, burnishing is performed while cleaning the peripheral surface of the cylindrical hole 10 again with the cutting oil C.

That is, the roller member 2 is advanced at a predetermined feed speed by the holder member 1 toward the opening end of the cylindrical hole 10 of the work W rotated at a low speed around the axis A. The roller member 2 is attached to the opening end of the cylindrical hole 10.
When the pressurizing portion 5 approaches, the cutting oil C begins to be strongly sprayed from the outlet passage 8 onto the peripheral surface of the cylindrical hole 10 rotating around the axis A. Thus, the peripheral surface of the cylindrical hole 10 is cleaned. And
When the pressurizing portion 5 comes into contact with the opening end of the cylindrical hole 10, the roller member 2 is driven to rotate by the cylindrical hole 10. Burnishing by F. Incidentally, when the surface roughness after pre-processing by turning was about 4S to 6S, the surface roughness was improved from 1S to about 2S after burnishing. In addition, according to the pressurizing part 5 of the said structure, the corner of the groove | channel 11 provided in the cylindrical hole 10 of the workpiece | work W and the bottom corner 12
Is also burnishable.

During the burnishing process, the exit path 8 is rotated around the axis X so as to draw a conical side surface by the driven rotation of the roller member 2, so that the exit path 8 is ejected from the exit path 8. Burnishing can be performed while sufficiently cleaning the burnishing area B located on the front side in the forward direction of the pressurizing unit 5 with the cutting oil. In the burnishing, the pressing unit 5 may be advanced or retracted only once with respect to the burnishing region B. However, in order to improve the finishing accuracy, the pressing unit 5 is moved from the reciprocating position to the burnishing region B once. You may make several round trips. The above-described cleaning only step interposed between the cutting step of the cylindrical hole 10 and the burnishing step may be omitted. That is, first, the cylindrical hole 10 is cut in the work W, and subsequently, the peripheral surface of the cylindrical hole 10 is burnished by the pressurizing unit 5 while being cleaned with the cutting oil from the outlet path 8.

The values of the outer diameter D, the protruding radius R, and the pressing force F of the pressing portion 5 can be set to various values in accordance with the work surface of the work W and the required surface roughness. It is. However, according to experimental results, it is preferable to set as follows in consideration of finishing accuracy, work efficiency, and the like.

The protrusion radius R of the pressing portion 5 is preferably selected within a range of 0.2 mm to 5 mm, and more preferably, within a range of 0.2 mm to 1.5 mm. The pressing force F is set at 50 kgf to 300 kgf in order to prevent excessive stress from acting on the tool rest or the work W to which the holder member 1 is attached and to improve finishing accuracy. (490 N to 2900 N), more preferably 100 kgf to 2 kg.
It is about 00 kgf (980 N to 2000 N).

Further, when the roller member 2 is considered to be a cantilever, the above-mentioned elastic characteristic shows that the pressing portion 5 which is a free end has a resistance corresponding to a pressing force F of 100 kgf (about 980 N). When a force is applied, the bending of the pressurizing section 5 is about 0.02 m
Preferably, it is in the range from m to about 0.1 mm. The feed speed of the roller member 2 in the axial direction is preferably in the range of 0.05 mm to 0.3 mm per rotation of the work W, and more preferably 0.1 mm to 0.2 mm per rotation.
mm.

FIG. 3 shows a modified example of the first embodiment, and is a cross-sectional view corresponding to FIG. In this case, another exit path 9 is opened at the distal end surface of the roller member 2, and the other exit path 9 is directed toward the distal end portion of the outer circumferential space S of the pressurizing section 5. For this reason, the opening end of the cylindrical hole 10 of the work W can be sufficiently cleaned immediately before the start of the burnishing process, and further, the front space in the forward direction of the pressurizing unit 5 can be strongly and sufficiently cleaned. Note that FIG.
As shown in the two-dot chain line in FIG.
An exit path 8 similar to that of FIG. 2 described above may be provided in addition to the above-mentioned another exit path 9.

FIGS. 4 to 6 show the second to fourth embodiments, respectively, and correspond to FIG. 1 described above.
In these embodiments, members having the same configuration as in the first embodiment will be described in principle with the same reference numerals.

The second embodiment shown in FIG. 4 is an apparatus suitable for burnishing a large-diameter inner or outer peripheral surface. In this case, the holder member 1 is formed to be long in a rod shape, and the long holder member 1 is provided with the above-described elastic characteristics.
The roller member 2 is rotatably fitted to the tip of the holder member 1 via a plurality of radial bearings 3 and 4. Reference numeral 13 denotes a spacer for the bearings 3 and 4 described above. Further, the flow path 6 is constituted only by the holder flow path 6a extending in the axial direction. The outlet path 8 of the flow path 6 is opened on the outer peripheral surface of the distal end of the holder member 1 and directed toward the distal end of the outer peripheral space S of the pressurizing section 5.

The third embodiment shown in FIG. 5 is similar to the second embodiment shown in FIG.
It differs from the embodiment in the following points. The flow path 6 includes a holder flow path 6 a and a plurality of radiation holes 15 extending in the axial direction in the holder member 1, a through hole 16 in the spacer 13, and a roller flow path 6 b in the roller member 2. . The roller flow path 6 b functions as another outlet path 9, is opened on the outer peripheral surface of the roller member 2, and is directed to the outer peripheral space S of the pressure unit 5. In addition, as shown in a two-dot chain line diagram in FIG. 5, an outlet path 8 similar to that in FIG. 4 described above may be provided at the tip end of the holder member 1 in addition to the another outlet path 9. .

The fourth embodiment shown in FIG. 6 is an apparatus suitable for burnishing the outer peripheral surface of a long work supported at both ends, and differs from the third embodiment shown in FIG. 5 in the following point.
That is, the holder member 1 is formed in an L-shape by the holder main body 19 and the elongate pin 20, and the elongate pin 20 is mainly provided with the above-described elastic characteristics. The roller member 2 is rotatably fitted to the long pin 20 via a plurality of radial bearings 3 and 4. Code 21
22 is an O-ring for the holder channel 6a.

Each of the above embodiments can be modified as follows. The pressing unit 5 may be formed of a member different from the roller member instead of being formed integrally with the roller member 2. In this case, it is conceivable to join the pressing portion to the roller member by brazing, an adhesive, or the like.

The outlet passage 8 of the flow passage 6 is preferably opened toward the outer peripheral space S of the pressurizing section 5 as described above, but is configured to spray cutting oil to the burnishing area B of the work W. And various structures are conceivable. For example, when burnishing the outer peripheral surface of a round bar-shaped work, an outlet path extending in the generatrix direction of the outer peripheral surface of the work may be provided in the holder member.
Further, for example, when burnishing a cylindrical hole surface of a cylindrical work, an outlet path extending in a generatrix direction of the cylindrical hole surface may be provided in the holder member or the roller member. In the case of this cylindrical hole burnishing, it is possible to clean the burnishing area B with the inverted cutting oil by spraying the cutting oil ejected from the outlet path onto the bottom wall of the cylindrical hole and inverting the same.

The fluid for cleaning the burnishing area B may be another kind of liquid such as lubricating oil instead of the above cutting oil, or may be a gas such as compressed air or nitrogen. Good. In addition, when a liquid is used as the cleaning fluid, foreign substances such as chips can be more strongly cleaned than when a gas is used, and the pressing portion 5 of the roller member 2 and the work W Can be cooled strongly to maintain good processing accuracy.

The present invention can be applied not only to the illustrated NC lathe, but also to other types of machine tools such as a general-purpose lathe and a machining center. The pre-processing for burnishing is not limited to cutting such as turning, but may be other types of machining such as grinding. Further, the pre-processed work may be subjected to a heat treatment or the like, and thereafter burnished.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a burnishing device according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part in FIG.

FIG. 3 is a view showing a modification of the present invention and corresponding to FIG. 2 described above.

FIG. 4 is a view showing a second embodiment of the present invention and corresponding to FIG. 1 described above.

FIG. 5 shows a third embodiment of the present invention and is a view corresponding to FIG. 1 of the above embodiment.

FIG. 6 is a view showing a fourth embodiment of the present invention and corresponding to FIG. 1 of the above embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Holder member, 2 ... Roller member, 5 ... Pressurizing part, 6 ... Flow path, 8 ... Exit path, 9 ... Different exit path, B ... Burnishing area (cylinder hole 10 of work W), C ... Fluid ( Cutting oil), S: outer peripheral space of the pressurizing section 5.

Claims (5)

[Claims] 1. A roller member (2) rotatably supported by a holder member (1), and an annular pressing portion protruding radially outward from an outer peripheral surface of a tip end portion of the roller member (2). (5)
A flow path (6) formed in at least one of the inside of the holder member (1) and the inside of the roller member (2), and from the outlet paths (8, 9) of the flow path (6). Fluid ejected
The burnishing device according to (C), wherein the burnishing area (B) to which the pressurizing section (5) is brought into contact can be cleaned. 2. The burnishing device according to claim 1, wherein the outlet passages (8, 9) of the flow path (6) are opened toward the outer peripheral space (S) of the pressurizing section (5). A burnishing device characterized by the above. 3. The burnishing device according to claim 2, wherein a base portion of said roller member (2) is fitted inside said holder member (1), and an interior of said holder member (1) and said roller member (2) are fitted. )
The flow path (6) is formed so as to extend in the axial direction over the inside of the roller member, and the outlet paths (8, 9) of the flow path (6) are opened at the leading end of the roller member (2). Pressurizing part (5)
A burnishing device oriented toward an outer peripheral space (S) of the burnishing device. 4. The burnishing device according to claim 2, wherein the roller member (2) is externally fitted to a tip end of the holder member (1), and the flow path is provided inside the holder member (1). (6) is formed to extend in the axial direction, and the outlet path of the flow path (6)
A burnishing device characterized in that (8) is opened at the tip of the holder member (1) and directed toward the outer peripheral space (S) of the pressurizing section (5). 5. The burnishing device according to claim 2, wherein the roller member (2) is externally fitted to a tip end of the holder member (1), and the inside of the holder member (1) and the roller member are mounted.
A flow path (6) is formed over the interior of (2), and the flow path
Burnishing characterized in that the outlet paths (8, 9) of (6) are opened to the outer peripheral surface of the roller member (2) and directed toward the outer peripheral space (S) of the pressurizing section (5). apparatus.