JP5262178B2 - Grinding apparatus and grinding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grinding device eliminating clogging of a grinding tool. <P>SOLUTION: This grinding device has a backup shoe 15 to pressurize a wrapping film 20 on a workpiece 101 (102) supported by a workpiece fixture 11 and moves the wrapping film 20 between the workpiece 101 (102) and the backup shoe 15. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a grinding apparatus and a grinding method.

Conventionally, in order to process a plurality of processed surfaces, there is an apparatus provided with a plurality of grindstones having a grinding degree corresponding to each processed surface (for example, Patent Documents 1 and 2).
JP 2006-15432 A JP 2007-196302 A

  However, these conventional techniques do not consider clogging of the grindstone surface. In particular, when the portion to be processed is a small shape, the processing is performed with a small grindstone, so that the grindstone surface is quickly clogged.

  Accordingly, an object of the present invention is to provide a grinding apparatus and a grinding method capable of solving the problem of clogging of a grindstone.

The present invention for solving the above-described problems includes a flexible member provided with abrasive grains on one surface, a backup shoe that presses the flexible member against a workpiece, and the flexible member as the workpiece and the workpiece. possess a moving means for moving between the backup shoes and the workpiece is not more two of a first workpiece and a second workpiece, the first workpiece and each of the second work wherein the machining area flexible member is in contact, and grinding, characterized in that have a workpiece fixing means for fixing the first workpiece to the second workpiece so as to sandwich the backup shoe by each machined portion Device.

The present invention for solving the above problems, the workpiece while pressing the flexible member abrasive grains provided on the surface side in contact with the workpiece by the backup shoe, Lab move the flexible member It is a cutting method , and the work is composed of two parts including a first work and a second work, and the backup shoe is sandwiched between the processing parts of the first work and the second work. The first work and the second work are fixed, the first work and the second work are pressed toward the backup shoe, the first work and the backup shoe, and the first work The grinding method is characterized in that the flexible member is moved between the workpiece 2 and the backup shoe .

  According to the present invention, the abrasive grain surface in contact with the processing site is always a new surface, so that the grindstone is not clogged.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic view of a grinding apparatus in an embodiment to which the present invention is applied.

  The grinding device (hereinafter simply referred to as device 1) has a workpiece fixing jig 11 (work fixing means) and a backup shoe 15 that presses the wrapping film 20 against the workpiece 101 (102) supported by the workpiece fixing jig 11. . The apparatus 1 includes a clamp mechanism 12 that opens and closes the workpiece fixing jig 11, and an elasticity that attaches the workpiece fixing jig 11 to the clamp mechanism 12 and presses the workpiece 101 (102) toward the backup shoe 15 with a predetermined pressing force. A member 13 and an air cylinder 14 for opening and closing the clamp mechanism 12 are provided. Further, the apparatus 1 includes winding devices 24 and 25 (moving means) for reciprocating the wrapping film 20.

The workpiece fixing jig 11 fixes the workpiece 101 (102). The workpiece fixing jig 11 is
It is attached to the clamp mechanism 12 by an elastic member 13 and can be rotated by a support shaft 21. This is because, when an unnecessary lateral force is applied to the workpiece 101 (102) by the support shaft 21 (for example, the workpiece is temporarily pulled by a wrapping film), the workpiece fixing jig 11 is moved to the workpiece 101 ( 102) to prevent the workpiece 101 (102) from being damaged by this force and the wrapping film 20 from being cut.

  The wrapping film 20 is made of a strip-shaped flexible member. Abrasive grains are formed on one surface.

  The backup shoe 15 is movable in a direction orthogonal to the direction in which the workpiece 101 (102) is pressed (left and right in the figure, hereinafter referred to as a horizontal direction). The moving mechanism (not shown) for moving the backup shoe 15 is not particularly limited, and may be a mechanical feed screw mechanism, for example. Further, the backup shoe 15 is formed to have a desired workpiece shape in preparation for use in a fixed state. That is, the shape of the backup shoe 15 is transferred to the workpiece 101 (102) by grinding.

  The elastic member 13 presses the processed portion of the workpiece 101 (102) against the backup shoe with a predetermined pressing force. The pressing force at this time is a pressure at which the movement of the wrapping film 20 is not hindered between the workpiece 101 (102) and the backup chute and the processing site is reliably ground. In the case shown in the drawing, a coil spring is shown as the elastic member 13. However, the elastic member 13 is not limited to this and may be an air-type, oil-type, or mechanical-type elastic member.

  The clamp mechanism 12 is opened and closed by an air cylinder 14. The clamping mechanism 12 can change the degree of opening and closing so that various positions of the workpiece 101 (102) can be ground together with the lateral movement of the backup shoe 15.

  Each of the winding devices 24 and 25 is attached to a motor (not shown) that can freely rotate forward and backward. And the wrapping film 20 is moved by rotation of this motor. When the wrapping film 20 is moved, for example, the rotational speed of the winding device (for example, 25) on the winding side is preferably slightly faster than the rotational speed of the winding device (for example, 24) on the sending side. Accordingly, a tensile force is always applied to the wrapping film 20 so that it does not sag in the middle. The difference in the number of rotations may be adjusted so that a preferable tensile force is applied to the wrapping film 20 in consideration of the length and weight of the wrapping film 20 and the shape of the processed part.

  In this apparatus 1, two workpieces 101 and 102 can be attached and processed at the same time. As shown in the figure, the workpieces 101 and 102 are installed so that the backup shoe 15 is sandwiched depending on the processing parts of the workpieces 101 and 102.

  FIG. 2 is a view showing an example of a workpiece 101 (102) to be processed by the apparatus 1. As shown in the figure, for example, it is used for processing a cam used in an engine.

  The first grinding process using the apparatus 1 is performed with the backup shoe 15 fixed. First, the workpieces 101 and 102 are clamped by the clamp mechanism 12 so that the wrapping film 20 is sandwiched between the backup shoe 15 and the processed parts of the workpieces 101 and 102. At this time, it is set so that the abrasive grain surface of the wrapping film 20 faces the processed part.

  The wrapping film 20 is hung on a pulley 19 for changing the feeding direction on the way. The wrapping film 20 is moved by the winding devices 24 and 25 so as to be reciprocally movable. By this movement, the processing parts of the workpieces 101 and 102 are ground.

  Next, a case where the backup shoe 15 is laterally moved will be described as a second grinding process using the apparatus 1. FIG. 3 is an explanatory diagram for explaining the lateral movement of the backup shoe. In FIG. 3, only the main part of the apparatus 1 is shown.

  As shown in FIG. 3, by moving the backup shoe 15 in the lateral direction, not only grinding that copies the shape of the backup shoe 15 to the workpieces 101 and 102 but also grinding of the flat portion can be performed.

  For example, as shown in FIG. 3, the grinding of the flat portion is performed by first moving the backup shoe 15 laterally and opening the clamp mechanism 12 so that the parts to be machined of the workpieces 101 and 102 hit the backup shoe 15 (see FIG. 3). Adjust the opening angle. Then, the backup shoe 15 is further moved laterally while moving the wrapping film 20. The degree of opening and closing of the clamp does not need to be changed after the part to be processed is adjusted so as to hit the backup shoe 15 (that is, during the grinding operation of the flat portion). This is because, since the workpieces 101 and 102 are pressed by the elastic member 13, an appropriate pressing force is applied without changing the opening / closing degree of the clamp mechanism 12. Of course, when the degree of opening / closing by the clamp mechanism 12 needs to be adjusted, it may be changed each time.

  Thereby, not only the shape transfer of the backup shoe 15 but also the grinding of the flat part of the work can be performed.

  According to the present embodiment described above, the following effects can be obtained.

  By using the wrapping film 20, the abrasive grain surface in contact with the workpieces 101 and 102 is always a new surface, so that the grindstone is not clogged.

  Since the backup shoe 15 is sandwiched between the two workpieces 101 and 102 and the wrapping film 20 is moved between the workpieces 101 and 102 and the backup shoe 15, the two workpieces 101 and 102 are ground at a time. be able to.

  Since the backup shoe 15 can be moved laterally, not only the shape of the backup shoe 15 but also the flat part can be ground.

  Although the embodiment to which the present invention is applied has been described above, the present invention is not limited to this embodiment. For example, when processing two workpieces at a time, the shapes of the processing parts of the workpieces do not have to be the same. For this purpose, as long as the shape of the back-up shoe is matched to each processing shape, a different shape can be transferred and processed for each workpiece.

  Moreover, although the example which grinds a flat part by laterally moving the backup shoe 15 was demonstrated, this is applicable also when grinding a gentle curved surface etc., for example. In this case, for example, by moving the backup shoe 15 laterally, the opening amount (or opening angle) of the clamp mechanism 12 is gradually opened or closed in accordance with the curved surface, thereby changing the pressing force on the processing site, What is necessary is just to adjust so that a curved surface may be formed.

  Moreover, it can be used not only for dry grinding but also for grinding while flowing coolant. In addition, it goes without saying that the present invention can be used for various grinding processes.

It is a schematic diagram of a grinding device in an embodiment to which the present invention is applied. It is a figure which shows an example of the workpiece | work to process. It is explanatory drawing for demonstrating the horizontal movement of a backup shoe.

Explanation of symbols

1 device,
11 Work fixing jig,
12 Clamp mechanism,
13 elastic member,
14 air cylinder,
15 Backup shoe,
20 Wrapping film,
100 work.

Claims (4)

A flexible member provided with abrasive grains on one surface;
A backup shoe that presses the flexible member against the workpiece;
The flexible member have a, a moving means for moving between said workpiece and said backup shoe,
The workpiece is two consisting of a first workpiece and a second workpiece,
The first work and the second work are arranged so that the flexible member is in contact with each processing part of the first work and the second work, and the backup shoe is sandwiched between the processing parts. grinding apparatus, characterized in that it have a workpiece fixing means for fixing. The backup shoe, grinding apparatus according to claim 1, wherein the workpiece is movable in a direction perpendicular to the direction to be pressed. The workpiece, the while pressed by the flexible member backup shoe provided with abrasive grains to the workpiece surface in contact side, a to that Grinding method moves the flexible member,
The workpiece is two consisting of a first workpiece and a second workpiece,
The first work and the second work are fixed by fixing the first work and the second work so that the backup shoe is sandwiched between the processing parts of the first work and the second work. Grinding, characterized in that a workpiece is pressed toward the backup shoe and the flexible member is moved between the first workpiece and the backup shoe and between the second workpiece and the backup shoe. Method. The grinding method according to claim 3, wherein the backup shoe is moved in a direction orthogonal to a direction in which the work is pressed.

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