JP2023081458A - Film lapping processing device - Google Patents

Abstract

To provide a film lapping processing device and a film lapping processing method that are capable of polishing a screw groove in a work of a screw shape with high accuracy.SOLUTION: A film lapping processing device 100 is a film lapping processing device for polishing a workpiece 102 of a screw shape with a polishing film 104, and includes: backup shoes 128, 130 for energizing the polishing film to a screw groove 106 in the workpiece; and shoe rotation mechanisms 132, 134 for matching a rotation angle of the backup shoes to a lead angle of the screw groove in the work by rotating the backup shoes. The show rotation mechanism rotationally vibrates the backup shoes during polishing of the screw groove.SELECTED DRAWING: Figure 1

Description

The present invention relates to a film wrapping apparatus and a film wrapping method for polishing a screw-shaped workpiece with a polishing film.

Film lapping is known as a method for polishing workpieces of metal parts. Film lapping is a polishing method that uses a polishing film coated with abrasive grains on the surface. For example, Patent Literature 1 discloses a film lapping apparatus in which the workpiece is a ball screw and the ball groove of the screw shaft of the ball screw is polished with a polishing film.

The film wrapping apparatus of Patent Document 1 includes a processing unit that holds a polishing film. The processing unit has a holder and a backup shoe. The holder is recessed in an arc shape along the outer peripheral surface of the screw shaft. The backup shoe is provided on the holder in an arc shape along the ball groove, protrudes in a convex shape paired with the concave shape of the cross section of the ball groove, and presses the polishing film against the ball groove.

In Patent Document 1, since the processing unit that holds the polishing film has a holder and a backup shoe, the polishing film can be brought into surface contact with a wide range of the ball grooves, and more efficient and precise polishing of the ball grooves can be performed. It is said that it will be possible.

JP 2019-171487 A

In the film wrapping apparatus of Patent Document 1, the workpiece is a ball screw and the cross-sectional shape of the screw groove is arcuate (semicircular). was possible.

However, when the workpiece is thread-shaped, the cross-sectional shape of the thread groove is almost rectangular (rounded square), so no pressure is applied to the side surface of the thread groove (tooth surface of the screw), resulting in insufficient grinding. there was a case. For this reason, there is a demand for polishing thread grooves of screw-shaped workpieces with higher precision.

SUMMARY OF THE INVENTION In view of such problems, an object of the present invention is to provide a film wrapping apparatus and a film wrapping method capable of polishing screw grooves of a screw-shaped workpiece with high accuracy.

In order to solve the above-described problems, a typical configuration of the film wrapping apparatus according to the present invention is a film wrapping apparatus for polishing a screw-shaped workpiece with an abrasive film, wherein the abrasive film is attached to the screw groove of the workpiece. and a shoe rotation mechanism for rotating the backup shoe to match the rotation angle of the backup shoe with the lead angle of the thread groove of the workpiece. It is characterized by rotating and vibrating the backup shoe.

In the above configuration, the backup shoe for urging the polishing film against the thread groove of the workpiece is rotated by the shoe rotation mechanism to match the rotation angle of the backup shoe with the lead angle of the thread groove of the workpiece, thereby polishing the thread groove. Inside, the backup shoe is oscillated. In other words, in the above configuration, when polishing the thread groove of the workpiece with the polishing film, the rotation angle of the backup shoe is adjusted to the lead angle of the thread groove of the workpiece, and the backup shoe is pressed against the thread groove (thread bottom). Further, the backup shoe is rotationally vibrated during grinding of the thread groove. As a result, the side surface of the thread groove (the tooth surface of the screw) can also be ground, and the thread groove of the screw-shaped workpiece can be ground with high accuracy.

It is preferable to further provide a backup shoe shift mechanism for adjusting the position of the backup shoe according to the lead of the work.

As a result, the position of the backup shoe pressed against the thread groove of the work can be adjusted according to the lead of the work.

The backup shoes are composed of a pair, a pair of arms to which the pair of backup shoes are attached, and a pair of arms for urging the pair of backup shoes against the work with the work sandwiched therebetween; a cylinder for opening and closing the pair of arms; It is preferable to further include a pair of shoe rotation mechanisms for respectively rotating the pair of backup shoes.

Thereby, the rotation angle of the pair of backup shoes is adjusted to the lead angle of the thread groove of the workpiece by the pair of shoe rotation mechanisms, and the pair of arms are closed by the cylinder to sandwich the workpiece vertically, for example, to form the pair of backup shoes. The shoe can be pressed against the thread groove of the workpiece. Furthermore, during grinding of the thread groove, the pair of backup shoes can be rotated and vibrated while sandwiching the work by the pair of shoe rotation mechanisms. Therefore, the screw groove of the workpiece can be polished with high precision while the workpiece is sandwiched between the pair of backup shoes.

In order to solve the above problems, a representative configuration of the film wrapping method according to the present invention is a film wrapping method for polishing a screw-shaped workpiece with an abrasive film, wherein a backup shoe is rotated to provide a backup film. The back-up shoe is urged against the thread groove through the polishing film, and the back-up shoe is rotated and vibrated during grinding of the thread groove by adjusting the rotation angle of the shoe to the lead angle of the thread groove of the workpiece. .

The constituent elements corresponding to the technical concept of the film wrapping apparatus described above and their descriptions are also applicable to this method. That is, in the above configuration, the rotation angle of the backup shoe is adjusted to the lead angle of the thread groove of the workpiece, the backup shoe is pressed against the thread groove (thread bottom), and the backup shoe is rotated and vibrated during grinding of the thread groove. Let As a result, the side surface of the thread groove (the tooth surface of the screw) can also be ground, and the thread groove of the screw-shaped workpiece can be ground with high accuracy.

ADVANTAGE OF THE INVENTION According to this invention, the film wrapping apparatus and film wrapping method which can grind the thread groove of a screw-shaped workpiece|work with high precision can be provided.

It is a figure which shows the film wrapping processing apparatus in embodiment of this invention. FIG. 2 is a diagram showing a state in which a work is being polished by the film wrapping apparatus of FIG. 1; FIG. 3 is an enlarged view of the main part of the film wrapping apparatus of FIG. 2 as seen from another direction; FIG. 4 is a view showing a state of a backup shoe during polishing of the film wrapping apparatus of FIG. 3;

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in these embodiments are merely examples for facilitating understanding of the invention, and do not limit the invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are given the same reference numerals to omit redundant description, and elements that are not directly related to the present invention are omitted from the drawings. do.

FIG. 1 is a diagram showing a film wrap processing device (hereinafter referred to as processing device 100) according to an embodiment of the present invention. FIG. 2 is a diagram showing a state in which the workpiece 102 is being polished by the processing apparatus 100 of FIG.

The processing apparatus 100 is a machine tool that uses a polishing film 104 to grind a thread groove 106 of a screw-shaped workpiece 102, which is an object to be processed shown in FIG. In addition, the operation of the processing apparatus 100 described below can be performed by computer control.

The processing device 100 includes a main body 108, a pair of arms 110 and 112, and a cylinder 114 for opening and closing the pair of arms 110 and 112. As shown in FIG. A pair of arms 110 and 112 are rotatably supported by a predetermined opening/closing shaft of the main body 108 .

The cylinder 114 opens the pair of arms 110, 112 by drawing the tails 116, 118 of the pair of arms 110, 112 as shown in FIG. Cylinder 114 also closes the pair of arms 110, 112 by separating tails 116, 118 as shown in FIG.

The processing apparatus 100 further includes a pair of support bases 120, 122, a pair of shoe units 124, 126, a pair of backup shoes 128, 130, and a pair of shoe rotation mechanisms 132, 134. Support base 120 is attached to plate 135 . The plate 135 is arranged parallel to the arm 110 (see FIG. 3), and is controlled by a backup shoe shift mechanism 137 fixed to the tip 110a of the arm 110 to change the distance from the tip 110a of the arm 110. It is adjustable. Also, the support base 122 is attached to the distal end portion 112 a of the arm 112 .

A pair of shoe units 124 and 126 are connected to and supported by a pair of support bases 120 and 122 via a pair of support shafts 136 and 138 that are part of a pair of shoe rotating mechanisms 132 and 134 . A pair of backup shoes 128 and 130 are attached to the pair of shoe units 124 and 126, respectively. The pair of support shafts 136, 138 is a fulcrum for adjusting the angle of the pair of shoe units 124, 126, and changes the angle of the pair of backup shoes 128, 130 for each pair of shoe units 124, 126 (described later). ).

A pair of backup shoes 128 , 130 are blocks made of a soft material (eg, urethane) and urge the polishing film 104 against the thread groove 106 of the workpiece 102 . The polishing film 104 is fed from a reel 140 through film guide rollers 142 onto a pair of backup shoes 128, 130 and is taken up by a take-up roller 144 as it wears. In the processing apparatus 100, it is possible to efficiently polish the screw groove 106 of the work 102 by moving the worn polishing film 104 appropriately.

A pair of shoe rotation mechanisms 132 and 134 are servo motors fixed to a pair of support bases 120 and 122 and include a pair of support shafts 136 and 138 . A pair of shoe rotation mechanisms 132 and 134 rotate a pair of backup shoes 128 and 130 together with a pair of shoe units 124 and 126 via a pair of support shafts 136 and 138 .

The pair of shoe rotation mechanisms 132 and 134 match the rotation angle of the pair of backup shoes 128 and 130 with the lead angle of the thread groove 106 of the workpiece 102 . In other words, the pair of backup shoes 128 and 130 are controlled by a pair of shoe rotation mechanisms 132 and 134 including a pair of support shafts 136 and 138, and take a posture along the lead angle of the thread groove 106 of the workpiece 102. can be done.

2, the pair of arms 110 and 112 can be closed by a cylinder 114 so that the work 102 can be sandwiched, for example, and the pair of backup shoes 128 and 130 can be urged against the work 102, respectively. .

As a result, in the processing apparatus 100, after matching the rotation angles of the pair of backup shoes 128 and 130 to the lead angle of the thread groove 106 of the workpiece 102 by the pair of shoe rotation mechanisms 132 and 134, the pair of arms 110 and 110 are rotated. By closing 112 , the pair of backup shoes 128 and 130 can be pressed against the thread groove 106 of the workpiece 102 .

Here, since the workpiece 102 has a screw shape, the cross-sectional shape of the thread groove 106 is substantially rectangular (rectangular with rounded corners) (see FIG. 4B). Therefore, by matching the rotation angle of the pair of backup shoes 128 and 130 with the lead angle of the thread groove 106 of the workpiece 102, the pair of backup shoes 128 and 130 are aligned with the thread bottom of the thread groove 106 shown in FIG. 4(b). If it is only pressed against 146, pressure will not be applied to the side surface 148 of the thread groove 106, that is, the tooth surface of the screw, which may result in insufficient grinding.

Therefore, the processing apparatus 100 performs control such that the pair of backup shoes 128 and 130 are oscillated by the pair of shoe rotation mechanisms 132 and 134 during polishing of the thread groove 106 .

FIG. 3 is an enlarged view of the main part of the processing apparatus 100 of FIG. 2 as seen from another direction. In the drawing, the polishing film 104 is omitted for convenience of explanation. FIG. 4 is a diagram showing the state of the backup shoe 128 during polishing of the processing apparatus 100 of FIG. FIG. 4A is a diagram showing a state in which the backup shoe 128 is pressed against the screw groove 106 of the workpiece 102. FIG. FIG. 4(b) is a cross-sectional view taken along the line AA of FIG. 4(a).

The processing apparatus 100 rotates a pair of backup shoes 128 and 130 by a pair of shoe rotation mechanisms 132 and 134 before grinding the thread groove 106 of the screw-shaped workpiece 102, thereby grinding the pair of backup shoes 128 and 130. are adjusted to the lead angles of the screw grooves 106 of the work 102, respectively. Furthermore, by closing the pair of arms 110 and 112 , the pair of backup shoes 128 and 130 are pressed against the screw groove 106 of the workpiece 102 via the polishing film 104 .

At this time, the backup shoe 128 is pressed against the thread groove 106 of the workpiece 102 from above as shown in FIG. On the other hand, the backup shoe 130 is pressed against the thread groove 106 of the workpiece 102 from below. The lead angle of the screw-shaped work 102 when viewed from above is opposite to the lead angle when viewed from below. Therefore, the pair of backup shoes 128 and 130 rotate in opposite directions about the pair of support shafts 136 and 138 (see FIG. 2) of the pair of shoe rotation mechanisms 132 and 134, respectively.

In this manner, the processing apparatus 100 can reliably press the pair of backup shoes 128 and 130 against the thread bottom 146 (see FIG. 4B) of the thread groove 106 of the workpiece 102 while sandwiching the workpiece 102 from above and below. .

Further, in the processing apparatus 100, as indicated by arrows B and C in FIG. 4A, the backup shoe 128 is rotated and vibrated by the shoe rotation mechanism 132 during polishing of the thread groove 106. As shown in FIG. As a result, as shown in FIG. 4(b), in addition to pressing the backup shoe 128 against the thread bottom 146 of the thread groove 106, the backup shoe 128 is rotated and vibrated during polishing of the thread groove 106. Sides 148 of threads 106 may also be ground. Here, the rotational vibration is a movement that swings like a pendulum with respect to the longitudinal center line D of the thread bottom 146 of the thread groove 106 and brings the backup shoe 128 into contact with the side surface 148 of the thread groove 106 . Say.

4(b), the polishing film 104 has a width capable of covering the thread bottom 146 and the side surface 148 of the thread groove 106, and is biased against the thread groove 106 by the backup shoe 128. Thus, the thread groove 106 can be reliably ground. Since the backup shoe 130 is also rotated and vibrated by the shoe rotation mechanism 134 during grinding of the thread groove 106 , the polishing film 104 can grind not only the bottom 146 of the thread groove 106 but also the side surface 148 of the thread groove 106 . .

Therefore, according to the processing apparatus 100, the pair of backup shoes 128 and 130 are pushed to the thread bottom 146 of the thread groove 106 by adjusting the rotation angle of the pair of backup shoes 128 and 130 to the lead angle of the thread groove 106 of the workpiece 102. The pair of backup shoes 128 and 130 are rotated and vibrated during polishing of the screw groove 106, and the side surface 148 of the screw groove 106 is also polished, thereby polishing the screw groove 106 of the screw-shaped workpiece 102 with high accuracy. can do.

The support base 122 is attached to a plate 135 whose distance from the tip portion 110a of the arm 110 can be adjusted under the control of a backup shoe shift mechanism 137. As shown in FIG. Therefore, the backup shoe 128 can adjust the position of pressing against the screw groove 106 of the work 102 from above according to the lead of the work 102 .

In the processing apparatus 100 described above, the workpiece 102 is sandwiched between the pair of backup shoes 128 and 130 to polish the thread groove 106. However, the present invention is not limited to this. Only one may be used to grind all the thread grooves 106 of the rotating workpiece 102 .

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. It is obvious that a person skilled in the art can conceive of various modifications or modifications within the scope described in the claims, and these also belong to the technical scope of the present invention. Understood.

INDUSTRIAL APPLICABILITY The present invention can be used as a film wrapping apparatus and a film wrapping method for polishing a screw-shaped workpiece with a polishing film.

DESCRIPTION OF SYMBOLS 100... Film wrapping apparatus, 102... Work, 104... Polishing film, 106... Screw groove, 108... Main body, 110, 112... Arm, 110a, 112a... Tip of arm, 114... Cylinder, 116, 118... Arm TAIL 120, 122 support base 124, 126 shoe unit 128, 130 backup shoe 132, 134 shoe rotation mechanism 135 plate 136, 138 support shaft 137 backup shoe shift mechanism 140... reel, 142... film guide roller, 144... take-up roller, 146... thread bottom of thread groove, 148... side surface of thread groove

Claims (4)

A film lapping device for polishing a screw-shaped workpiece with a polishing film,
a backup shoe for biasing the abrasive film against the groove of the workpiece;
a shoe rotation mechanism that rotates the backup shoe to match the rotation angle of the backup shoe with the lead angle of the thread groove of the workpiece;
The film lapping apparatus, wherein the shoe rotating mechanism rotates and vibrates the backup shoe during polishing of the thread groove. 2. The film wrapping apparatus according to claim 1, further comprising a backup shoe shift mechanism for adjusting the position of said backup shoe according to the lead of said work. The backup shoe is composed of a pair,
a pair of arms to which the pair of backup shoes are attached and which sandwich the work and bias the pair of backup shoes toward the work;
a cylinder for opening and closing the pair of arms;
3. The film wrapping apparatus according to claim 1, further comprising a pair of shoe rotation mechanisms for respectively rotating said pair of backup shoes. A film lapping method for polishing a screw-shaped workpiece with a polishing film,
Rotate the backup shoe to match the rotation angle of the backup shoe with the lead angle of the thread groove of the work,
biasing the backup shoe against the thread groove via the abrasive film;
A film lapping method, characterized in that the backup shoe is rotationally vibrated during polishing of the thread groove.

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