JPH0553813U - Clamp holder - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a holder that is an outer ring of a bearing after the work W has finished the inner surface of the bearing and is suitable for simultaneous machining of the chamfered portion and the seal groove, and which can easily adjust the position of the cutting edge. To do. [Structure] A holder to which a plurality of chips Cs, Cm are attached, and at least one of the chips Cm is provided with a fixing means to the holder body 1, and the chip Cm is provided.
The cartridge 8 is mounted so as to be movable in order to adjust the position of the cutting edge. The cartridge 8 is fixed by tightening the bolt 12. Cartridge 8 and holder body 1
And are screwed and connected by a double screw 17, and the bolt hole 11 is an elongated hole. The movement adjustment of the blade position is performed by loosening the bolt 12 and rotating the double screw 17 to move the cartridge 8 forward and backward.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a clamp holder (hereinafter, also simply referred to as a holder), and more particularly to a holder to which a plurality of chips are attached.

[0002]

[Prior Art]

 Conventionally, for example, when a workpiece is an outer ring of a bearing and the inner (circumferential) surface of a steel ball is chamfered to its edge and the seal groove is finished, a lathe etc. It was processed in this way. That is, a tip C1 having a special shape as shown in FIG. 4, that is, a tip having a special shape in which the shapes of the track K and the chamfer M are added to the cutting edge (cutting edge) is used. Process at the same time. Then, in the next step, the seal groove S was processed by using the specially shaped chip C2 in which the cutting edge was formed in the groove shape S.

This processing method requires only two steps for processing the chamfer M, the track K, and the seal groove S, and only one workpiece W has a special shape. This is because there are two chips (types) described above, and although not shown, there is an advantage that a normal clamp holder can be used.

[0004]

[Problems to be solved by the device]

 However, due to the peculiarity of the shape, the former chip C1 for simultaneous machining of orbital and chamfering is particularly inefficient in production, and the cost per chip is extremely high, resulting in the machining of the workpiece W. The cost was rising. The reason why the manufacturing cost of the chip C 1 is high is that the cutting edge has a corner portion (recess) H, and it is difficult to grind this portion. Moreover, in this type of work W, even if the track K has the same cross-sectional shape (circular arc), the radial distance D from the bottom of the track to the chamfer slightly differs depending on the size, and the chip C1 is different for each size. I needed to have them in stock. However, the chamfer angle is constant. Therefore, it has been pointed out that the chip C1 not only causes its own cost increase, but also lacks versatility and has a problem in its inventory management. By the way, it is also possible to manufacture the chip C2 for the sealing groove at a relatively low cost even though it has a similar special shape, because the material can be based on a normal triangular chip, and a relatively large number of chips are stacked and ground into the groove shape. This is because it can be done.

Under these circumstances, the present inventor has conducted various studies and tests on the processing method of this type of work W, and as a result, first finishes the track K using a triangular tip, and then chamfers M and seal grooves in the next step. It has been found that the machining cost of the work can be reduced by machining S using two chips at the same time. In other words, according to this processing method, the number of chips is increased by one while the number of chips is increased by one while the number of chips is three, while the number of chips is three, which is the same as the conventional method. It turned out that it could be realized, and the manufacturing cost could be reduced in total. On the other hand, on the other hand, a dedicated holder for mounting the above two chips, that is, a holder suitable for simultaneous machining of the chamfer M and the seal groove S, which can finely adjust the above-mentioned radial edge position between the chips, I don't exist.

The present invention has been devised in view of these points, and it is possible to provide a holder suitable for simultaneous machining of a chamfered portion and a seal groove after finishing a track in this type of work. To aim.

[0007]

[Means for Solving the Problems]

 To achieve the above object, the present invention provides a clamp holder to which a plurality of chips are attached, at least one chip having a fixing means for a clamp holder and movably mounted to adjust the position of the cutting edge of the chip. It is configured to be attached to the selected cartridge.

In this case, a screw hole is formed in the cartridge with the moving direction of the cartridge as the axial direction, and the screw hole of the screw hole and the reverse screw thread are provided in the clamp holder body with the axis coaxial with the screw hole axis. It is advisable to screw the screw members having screws that are screwed into the screw holes at both ends into the screw holes, and rotate the screw members to move the cartridge.

[0009]

[Action]

 With the above configuration, for example, when chamfering and sealing groove machining are performed on the outer ring of the bearing after the work is finished by raceway, install two chips, a chamfering chip and a sealing groove chip, with the specified settings. After that, it can be used for machining by fixing the cartridge to the tool post with the moving direction of the cartridge at right angles to the rotation axis of the workpiece. Then, in the above-mentioned adjustment in the radial direction between the positions of the blade edges, the fixing of the movably mounted cartridge is released. By doing so, the chip can be moved together with the cartridge, so that the blade is fixed to the desired position by using a setting gauge, if necessary. As a result, in the case of this type of work, it can be applied even if the distance between the chamfered portion and the seal groove varies depending on the size, and the manufacturing cost can be reduced.

Further, in a case where a screw member is screwed into both screw holes of the cartridge and the holder main body and the cartridge is moved by rotating the screw member, when the screw member is rotated, the chip and the chip are correspondingly rotated. Goes back and forth. Therefore, with this technique, fine adjustment of the blade edge position can be performed particularly easily.

[0011]

【Example】

 First Embodiment A first embodiment of the holder of the present invention will be described in detail with reference to FIGS. 1 and 2. In the figure, reference numeral 1 denotes a holder main body (also simply referred to as a main body). In this example, an outer ring of a bearing is a work W, and a seal groove tip (right side in FIG. 1) Cs and a chamfering tip (left side in FIG. 1) Cm are attached. Has been.

The seal groove tip Cs is placed in the tip mounting recess 2 formed in the main body 1, the flank surface is pressed against the restraining surface, and the clamp bolt 4 (not shown in detail) is pressed by the presser foot 3. It is clamped by screwing it into the main body 1, which is no different from the conventional one. However, in this example, the groove 5 is formed on the upper surface of the main body 1 so as to be inclined, and the lower surface of the rear end of the presser foot 3 is placed in this groove 5, and the clamp bolt 4 is tightened to serve as a fulcrum, Utilizing this principle, the lower surface of the tip portion is configured to press the upper surface of the chip Cs (see FIG. 2). In addition, 6 is a sim sheet.

On the other hand, on the tip end side of the holder body 1, a flat concave portion 7 having a substantially rectangular shape in a plan view and having a long side in a direction substantially perpendicular to the axial direction thereof is formed by opening the front (lower side in FIG. 1), A cartridge 8 is mounted in the recess 7 as described below. However, a screw hole 9 is provided in the center of the recess 7. The cartridge 8 has a substantially rectangular plate shape in a plan view, and a chamfering (triangular) chip Cm is fixed to the tip of the cartridge 8 with a flat head screw 10, and the height of the cartridge 8 is substantially the same as the upper surface of the main body 1 along the long side of the recess 7. It is mounted so that it can slide. Incidentally, in this example, the tip Cm is set to be chamfered at 30 degrees. Further, the cartridge 8 is provided with a bolt hole 11 penetrating substantially the center thereof, and a predetermined bolt (hexagon socket head cap screw) 12 is inserted therethrough, and the cartridge 8 is set in a recessed state and screwed into the screw hole 9. However, it is fixed to the main body 1. However, the bolt hole 11 and the counterbore hole 13 are long holes having a long diameter in the sliding direction, and are set so that the cartridge 8 can be slid in that direction (the direction of the arrow in the drawing) by the gap when the bolt 12 is in a loosened state. There is.

On the other hand, in the center of the rear end surface of the cartridge 8, a screw hole (right screw) 14 is formed with the sliding direction as an axis. A screw hole (left-hand screw) 16 is also formed through the rear wall 15 of the rear portion of the main body, with the shaft line being coaxial with the shaft line of the screw hole 14. However, both screw holes differ only in right and left, and have the same diameter and pitch. Thus, in this example, the double screw 17 is screwed into the both screw holes 14 and 16 as a screw member having screws at both ends to fit these screw holes. As a result, if the double screw 17 is appropriately rotated by a hexagon wrench to the right to advance (screw), the cartridge 8 advances, while conversely, if it is rotated to the left and retracted, it retracts in the same direction. With this configuration, the position of the chamfering tip Cm can be finely adjusted.

Next, using the holder of this example, when machining the above-mentioned work whose trajectory is finished with a normal triangular tip nose in the previous step, this is mounted on a tool post of a dedicated machine (not shown) as a cartridge. Set the moving direction of 8 at right angles to the axis of rotation of the work and fix it at the specified position for machining. Then, when adjusting the position of the cutting edge by changing the work W, the bolt 12 is loosened to release the fixation of the cartridge 8, and the double screw 17 is appropriately rotated under the same to remove the chamfering tip Cm together with the cartridge 8. Move and adjust (dimension) the cutting edge to the desired position using the setting gauge if necessary. After that, the cartridge 8 is similarly fixed and the work is processed.

In this example, the blade tip position is determined by stopping the rotation of the double screw 17, so that the bolt 12 can be tightened under the blade tip for adjustment. Thus, in the case of this type of work, even if there is a change in the radial distance from the chamfered portion to the seal groove due to size, the position of the cutting edge between the two tips can be finely, simply and quickly adjusted. Therefore, it is possible to reduce the processing cost without impairing the workability.

In this embodiment, the cartridge 8 can be moved and adjusted by using the bolt hole 11 and the counterbore hole 13 as elongated holes. However, for example, the cartridge is used as the screw hole 14 of the double screw 17 or the chamfering tip Cm. It is also possible to make a large adjustment amount by forming a cutout-like U-shape that is open at one end so as not to interfere with each other. Note that this range is set appropriately in consideration of the size of the work W and the like. Further, as a matter of course, the fixing means of the cartridge 8 may be a conventional clamp method using a presser foot.

In this example, the case where the work W has its outer surface of the bearing machined on its inner surface has been described, but the scope of application of the holder of the present invention is not limited to this. Further, although the case where the number of chips is two has been illustrated, this number may be appropriately set according to the work. It is only necessary that at least one of the positions can be adjusted, and the seal groove tip Cs in this example may be attached to the cartridge so that it can be moved.

Second Embodiment FIG. 3 shows another embodiment of the moving means of the cartridge 28. In the previous example, the cartridge 8 was moved by screwing the double screw 17 from the rear (lateral) direction and moving it forward or backward, but in this example, it was screwed into the screw hole 36 of the main body 21. By rotating the set screw 37, the cartridge 28 is moved in at least one direction to simplify the structure. Below, a detailed explanation will be given focusing on the differences.

That is, in this example, a screw hole 36 is formed in the rear wall 35 of the main body 21 with the moving direction of the cartridge 28 as the axial direction, and a set screw (hexagonal set screw) 37 is screwed into the screw hole 36. By rotating this, the cartridge 28 can be moved only forward. In other words, the rear end surface of the cartridge 28 can be restrained by the front end surface portion of the set screw 37. When moving backward, the cartridge 28 is pushed back so that the rear end surface abuts on the front end surface of the set screw 37. Under that, the cartridge 28 is fixed to the main body 21 with the bolt 32. Although the axial direction of the set screw 37 is the same as the moving direction of the cartridge 28 in this example, it is sufficient that the cartridge 28 can be moved by the movement of the set screw 37.

Further, in this case, when the cartridge 28 is biased in the direction of the tip end surface of the set screw 37 by a spring member so that the rear end surface of the cartridge 28 positively contacts the tip end surface of the set screw 37. Good. For example, as shown by a chain double-dashed line in FIG. 3, if the tension coil spring B pulls the cartridge 28 toward the rear wall 35, or the compression coil spring (not shown) is used to press the cartridge 28. Even if the set screw is screwed and then retracted, both can be positively brought into contact with each other, so that the adjustment of the blade tip position is simple and convenient. Further, by doing so, it is possible to prevent the blade edge position from wobbling due to the backlash of the screw during adjustment.

[0022]

[Effect of the device]

 As is clear from the above description, the clamp holder according to the present invention has the following effects. That is, for example, in the case where the work is the outer ring of the bearing after the track finish and the blade tip position of the attached predetermined tip is adjusted, the tip (blade tip) is desired together with the cartridge by releasing the fixation of the cartridge. It can be moved and adjusted to the desired position. As a result, machining of this type of workpiece can be applied to workpieces of different sizes, and therefore, it is expected that the machining cost will be reduced as compared with the case of using the conventional machining method.

Further, in the technique of screwing screw members into both screw holes of the cartridge and the holder main body and moving the cartridge by rotating this screw member, when the screw member is rotated, the screw member is rotated in accordance with the rotation. Since the tip moves back and forth together with the cartridge, the position of the cutting edge can be adjusted particularly easily and quickly.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view showing a first embodiment of a clamp holder embodying the present invention.

FIG. 2 is a sectional view taken along the line AA in FIG.

FIG. 3 is a partially cutaway partial plan view showing another embodiment of the moving means of the cartridge.

FIG. 4 is a conceptual plan view illustrating a conventional method for processing the inner surface of the outer ring of the bearing.

[Explanation of symbols]

 1 Clamp Holder Main Body 8 Cartridge 12 Bolt (Fixing Means) 14 Screw Hole (Right Thread) 16 Screw Hole (Left Thread) 17 Double Screw (Cartridge Moving Means) Cs Seal Groove Tip Cm Chamfering Tip

Claims (2)

[Scope of utility model registration request] 1. A clamp holder to which a plurality of tips are attached, wherein at least one tip is attached to a cartridge that is provided with a fixing means for the clamp holder and is movably attached to adjust the tip position of the tip. A clamp holder characterized by the above. 2. A screw hole is formed in the cartridge with the moving direction of the cartridge as the axial direction, and a screw hole of the screw hole and a reverse screw screw hole are formed in the clamp holder body with the axis coaxial with the screw hole axis. 2. The clamp holder according to claim 1, wherein the clamp holder is formed by screwing a screw member having a screw screwed into the both screw holes at both ends thereof, and the screw member is rotated to move the cartridge. ..