JPS6243715Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cutting tool support device installed in a machine tool to support a cutting tool, and particularly when the cutting tool is quickly returned in the opposite direction to the cutting feed after cutting is completed. The present invention relates to a cutting tool support device equipped with a retract device that moves a workpiece away from a cut surface of a workpiece in advance and prevents a return mark from being left on the cut surface of the workpiece.

In a machine tool such as a lathe, if a cutting tool such as a cutting tool that has completed cutting is returned quickly while remaining in contact with the cutting surface of a workpiece, a so-called return mark of the cutting tool will be left on the cutting surface, which is not desirable. Therefore, when quickly reversing the cutting tool after cutting is completed, it is desirable that the cutting tool be retracted in advance so that the cutting edge separates from the already cut surface of the workpiece, and then be quickly returned.

Conventionally, as a cutting tool support device equipped with a retract device that performs such a cutting tool retraction function, a holder for holding a cutting tool is rotatably provided.
A device is known in which the cutting tool is rotated after cutting is completed to move the cutting edge away from the already cut surface of the workpiece, and then the cutting tool is quickly returned linearly.
However, in devices equipped with such a rotating retracting device, the distance between the bearing of the tool holder and the cutting edge of the cutting tool is unavoidably long, so the rigidity is insufficient and chatter may occur. This problem tends to occur, making it difficult to stabilize cutting, and since it is necessary to have a rotatable structure, a certain amount of clearance must be secured in the bearing part of the blade holder, which, together with the lack of rigidity mentioned above, causes problems. This will cause a decrease in machining accuracy. Furthermore, the cutting tool needs to have a shape that does not interfere with the already cut surface of the workpiece when it is rotated, and strength may be sacrificed due to constraints on the shape of the portion near the cutting edge.

On the other hand, Japanese Utility Model Application Publication No. 50-15682 discloses a knife release device that retracts the cutting edge by linear movement rather than rotational movement when moving to quick return. This type of device retracts the cutting edge in a direction perpendicular to the cutting feed direction. For example, when cutting the outer peripheral surface of a workpiece, the direction is perpendicular to the axis of the workpiece, and when cutting the shoulder surface, such as the shaft end face, the groove wall surface of a circumferential groove, or the stepped surface of a stepped shaft part, the direction is perpendicular to the axis of the workpiece. It is retracted in a direction parallel to the However, when the cutting edge is retracted in a direction perpendicular to the cutting feed direction, there is a drawback that wear of the cutting edge is accelerated. Whether cutting the outer circumferential surface or shoulder surface, cutting is performed by applying a constant depth of cut and feeding in a direction perpendicular to this depth of cut, and the cutting edge corresponds to the amount of cut in the forward direction of the cutting edge in the feed direction. A shoulder surface of height is formed. Then, when the cutting edge reaches the cutting end, the feeding is stopped, and the cutting edge is retracted, the cutting edge will be rubbed by the shoulder surface. That is, the cutting edge is rubbed by the shoulder surface without making a substantial cut in the direction perpendicular to the shoulder surface, and under such conditions the cutting edge is particularly susceptible to wear.

In addition, when retracting the cutting edge at the cutting end when cutting the outer periphery of a stepped shaft, etc., the cutting edge comes into contact with the shoulder surface perpendicular to the axis of the workpiece, accelerating the wear of the cutting edge, and the shoulder surface is already finished. If it is cut, this finished surface will also have scratches. Conversely, when cutting a shoulder surface that is perpendicular to the axis of the workpiece, such as a stepped surface or the groove wall surface of a circumferential groove, the cutting edge is When you retract the
The cutting edge comes into contact with the outer circumferential cutting surface parallel to the axis of the workpiece, accelerating the wear of the cutting edge, and furthermore, if this outer circumferential surface is a finished surface, problems such as scratches occur. In other words, when the cutting edge is retracted in the radial direction of the workpiece, the cutting edge interferes with the shoulder surface, and when the cutting edge is retracted in the axial direction of the workpiece, it interferes with the outer peripheral cutting surface, etc.

In addition, in NC (numerical control) lathes, etc., the movement in the X-axis and Y-axis directions is combined to move the cutting edge in a direction diagonal to the axis of the workpiece, that is, in a direction that intersects at an acute angle with the cutting feed direction. Although it is possible to avoid the above-mentioned inconvenience, in that case, a stopper and a clamp device are required to fix each movable part in the X-axis direction and the Y-axis direction, respectively. Therefore, the structure is complicated and the cost is high, and since two movable parts are clamped at two places, a strong clamp and high rigidity cannot be expected as a whole.

This invention eliminates the above-mentioned conventional drawbacks,
The purpose of this invention is to provide a cutting tool supporting device with a retracting device that does not interfere with the cutting edge of the workpiece during retraction, has high rigidity, can perform cutting with high precision, and has a simple structure. .

To achieve this purpose, the device according to the present invention includes a first slide to which cutting feed is applied in at least one direction, and a device attached to the first slide so as to be able to move linearly in a direction that intersects at an acute angle with the direction of the cutting feed. a second slide for holding a cutting tool in the tool mounting portion; a stopper provided on the first slide to define a limit of advancement of the second slide with respect to the first slide; and the second slide contacts the stopper. when the second slide and the first slide are in the forward position.
a wedge-shaped locking member that fits into a wedge-shaped gap formed by two surfaces facing each other in the direction of movement of the slide, advances the second slide by a wedge action, and presses it against the stopper to fix it at the forward end position; is provided between the first slide and a wedge-shaped locking member, the wedge-shaped locking member is moved from the unlocked position to the locked position to produce the locked state of the second slide, and the wedge-shaped locking member is moved to the locked position. and a retracting device for moving the cutting tool from the cutting position by moving the cutting tool from the cutting position to the unlocked position and retracting the second slide from the forward end position.

In addition, in the configuration in which the second slide is moved in a direction that intersects the cutting feed direction at an acute angle,
This means that the angle formed by the vector in the cutting feed direction and the vector in the forward direction of the second slide is an acute angle.

In a cutting tool support device configured in this way, the retraction is provided not by rotation but by linear movement, so greater rigidity can be obtained compared to conventional rotation type devices. Furthermore, there is no need to consider interference between the tool and the workpiece during rotation, unlike in the conventional method.

In addition, since the cutting edge is retracted diagonally with a motion component in the opposite direction to the cutting feed direction, the cutting edge is not rubbed against the shoulder surface corresponding to the cutting depth of the workpiece when retracting at the cutting end. This eliminates the problem of wear on the cutting edge. In addition, when cutting the outer circumferential surface or groove bottom surface while applying cutting feed in a direction parallel to the axis of the workpiece, when retracting the stepped surface of the stepped shaft or the groove wall surface, it is necessary to This prevents the cutting edge from coming into contact with the shoulder surface. On the other hand, in the case of such shoulder surface cutting, contact of the cutting edge with the outer peripheral cutting surface or the groove bottom surface during retraction is avoided. Therefore, there is no need to worry about accelerated abrasion of the cutting edge due to retraction or scratches on the finished surface, and therefore the versatility of the tool support device can be increased.

Furthermore, the diagonal retraction is performed in a uniquely determined direction by setting the movement direction of the second slide relative to the first slide diagonally in advance. Compared to the combination of motions, only one stopper and clamping (locking) means are required, the structure is simple and inexpensive to manufacture, and the clamping and overall rigidity are reliable.

Moreover, since cutting is performed with the second slide pressed against the stopper and firmly clamped by the wedge action of the wedge-shaped lock member, great rigidity is guaranteed despite the double slide structure, making it possible to perform highly accurate cutting. Become. Furthermore, the wedge-shaped locking member not only generates a clamping force, but also functions to move the second slide until it comes into contact with the stopper based on the operation of the retracting device, so that the advancement of the second slide and the clamping are performed by a single wedge mechanism. carried out,
Moreover, the retracting device releases the locked state of the wedge-shaped locking member and retracts the second slide, and the unlocking and retracting of the cutting edge are performed by one mechanism, so the structure as a whole is further simplified. be.

Hereinafter, an embodiment in which the present invention is applied to a device that supports a cutting tool (bite) for finishing the groove wall surface of a groove cut in advance on a lathe will be described with reference to the drawings.

In FIGS. 1 and 2, reference numeral 2 denotes the slide body of the first slide 6, which is moved along a straight line B perpendicular to the rotation center line A of the main shaft end 4 of the lathe. In this embodiment, the direction of the straight line B is the cutting feed direction. A slide pedestal 10 having a groove-shaped cross section and a guide groove 8 is disposed on the upper surface of the slide body 2, and an adjustment screw is inserted in the direction of a key 12 provided between the slide body 2 and the slide pedestal 10. 13 and the plurality of bolts 1
4 to the slide body 2.

The second slide 16 is fitted into the guide groove 8 provided in the slide pedestal 10, and the minute clearance between the guide groove 8 and both groove wall surfaces is adjusted with the bolts 20 and 22 via the jib 18. It is held so that it can slide along a straight line C that makes a constant angle α (preferably an angle of about 5° to 20°) with respect to the moving direction of the first slide 4 (direction of cutting feed along straight line B). has been done. A cover plate 24 is fixed to the slide holder 10 with bolts so as to cover the upper opening of the slide holder 10, and the first slide 6 is configured. A cutting tool 28 is attached to the front end of the second slide 16 protruding from the first slide 6 via a cutting tool holder 26 whose cutting edge position can be adjusted. The cutting tool 28 has a cutting edge at its tip for finishing cutting the groove wall surface.

As shown in FIG. 2, a stopper abutting body 30 is fixed to the lower surface of the main body of the second slide 16 with a bolt 32, and is inserted into a recess 34 formed on the upper surface of the first slide 6. It is fitted with a certain gap between the wall surface and the bottom surface. On the other hand, the first slide 6 has a recess 3 from its front end surface.
A stopper 38 is constructed by screwing a headless bolt 35 into a screw hole formed through the wall of the recess 34 so as to protrude by a certain distance from the wall of the recess 34, and fixing it with a nut 36. ing. The second slide 1 is attached to the stopper 38 on the first slide 6 side.
By contacting the stopper abutting body 30 on the 6th side, the limit of advancement of the second slide 16 with respect to the first slide 6 is defined. In addition, the stopper contact body 3
0 can be considered part of the second slide 16.

At the rear of the slide pedestal 10, a second
While both walls of the guide groove 8 that guides the slide 16 are cut out, the rear part of the cover plate 24 has two hanging portions facing each other in parallel in a direction perpendicular to the sliding direction of the second slide 16. portions 40, 40 are formed, and these hanging portions 4
0 and 40 are located in the notched portion of the slide pedestal 10, and the hanging part 40 is further fixed to both side end surfaces of the hanging parts 40 and 40 from both sides of the slide pedestal 10 by a pair of reinforcing plates 42 and 42. ，
40 is prevented from deformation such as opening. A guide groove 44 is formed by these hanging parts 40, 40 of the cover plate 24, and this guide groove 44
A lock body 46 is slidably fitted in the second slide 16 in a direction perpendicular to the direction of movement of the second slide 16. An engagement protrusion 48 of a constant width is provided on the lower surface of the lock body 46 and extends over the entire length of the lock body 46 along a straight line inclined by a wedge angle β with respect to the sliding direction of the lock body 46. This engagement protrusion 48 is slidably engaged with an engagement groove 52 provided on the upper surface of the rear end portion 50 of the second slide 16 . The rear end 50 of the second slide 16 is thinner than the other parts and has the shape of a lug that extends rearward. Guide groove 4 through the notch provided in 40
4, and the second part is inserted into that part.
The engagement groove 52 is formed at a wedge angle β with respect to a direction perpendicular to the direction of movement of the slide 16.

Now, assuming a central plane that bisects this engagement groove 52 including the center line in the width direction, the cover plate hanging portion 40, which constitutes one surface of the first slide 6,
40 (the wall surface of the guide groove 44) and the wall surface of the engagement groove 52 that constitutes one surface of the second slide 16, with the central plane sandwiched between them, the second slide 1
6 are opposed to each other in the moving direction, forming a wedge-shaped gap. And those first slide 6
A lock body 46 is interposed between the opposing surfaces of the second slide 16 and the side surface of the engagement protrusion 48 and the side surface of the main body portion in contact with the respective surfaces, and the lock body 46 is a wedge-shaped lock member. It is designed to function as a Note that the wall surface of the engagement groove 52 and the wall surface of the guide groove 44 do not face each other in a straight line parallel to the moving direction of the second slide 16, but face each other in different positions in the vertical direction. ing.

When the lock body 46 is moved outward (upward in FIG. 1) along the guide groove 44, the engagement protrusion 48 of the lock body 46, which is formed with a wedge angle β, and the second slide 16 are engaged. The engagement with the mating groove 52 generates a force perpendicular to the direction of movement of the lock body 46, causing the second slide 16 to retreat a certain distance. A stopper 54 consisting of a headless bolt and a nut is provided on one of the reinforcing plates 42 and protrudes inwardly to face the front end surface of the lock body 46. Abutment defines the limits of its outward movement.

At the end of the lock body 46 opposite to the stopper 54, a horizontal notch 56 is formed, as shown in FIG.
8 is inserted and connected to the lock body 46 by a first pin 60 inserted through the lock body 46 in the height direction. The other end of this link 58 is relatively rotatably connected to one end of another toggle link 64 by a second pin 62, and the other end of this link 64 is connected to the first toggle link 64 by a second pin 62.
The third slide stand installed on the slide pedestal 10 of the slide 2
A toggle mechanism is configured by being rotatably supported by the pin 66 around its axis.

Each of the first, second and third pins 60, 6
2 and 66 are provided parallel to each other, and a central second pin 62 connected to two of the toggle links 58 and 64 is further connected to the middle portion of a sliding rod 68 as shown in FIG. . The sliding rod 68 is connected to the cover plate hanging portions 40, 4.
The rod is inserted into each rod hole provided in the second slide 16 with a gap, and one end is inserted into the guide hole 70 formed at the rear end of the second slide 16, and the rod is fixed to the hanging part 40 etc. on the rear side. The other end portions are respectively fitted into guide bushes 74 fixed to the end plates 72 and held so as to be slidable in the moving direction of the second slide 16. The axial center of this rod 68 is perpendicular to a plane including the axial centers of the first pin 60 and the third pin 66, and the second pin 62 is oriented in the axial direction of the rod 68 with respect to the rod 68. Although it is said that the rod 68 and the second pin 62 are relatively immovable,
A certain amount of movement is allowed in the direction perpendicular to the axis. In other words, as is clear from Figure 3, the second
The pin 62 is connected to the rod 68 in a slotted hole 76 formed in the middle thereof so as to be slidable in its longitudinal direction, and the two toggle links 58 and 64 extend laterally through the middle part of the rod 68. They are connected to each other by a second pin 62 within a link hole 78 provided in the same manner. As shown in FIG. 1, this link hole 78 is formed in a size that allows relative rotation of both links 58, 64.

Therefore, the sliding rod 68 is moved to the second position.
Two toggle rings 58, 6 via pin 62
If the angle formed by 4 is increased, the axis of the first pin 60 moves away from the axis of the third pin 66, which is fixed in position, so that the lock body 46 is slid along the guide groove 44.

The end of the sliding rod 68 on the guide bush 74 side is concentrically connected to a piston rod 86 of a cylinder 84, and the cylinder 84 is connected to the end plate 74.
The piston rod 86 is supported via a mounting plate 90 by a plurality of support legs 88 fixed to the piston rod 86, and includes a port 92 to which pressure oil is supplied to advance the piston rod 86, and a port 94 to which pressure oil to retreat the piston rod 86 is supplied. . This cylinder 84, the sliding rod 68 moved by its operation, and the above-mentioned toggle mechanism move the locking body 46 from the unlocked position to the locked position (see FIG. 1), and also move the locking body 46 from the unlocked position to the locked position (see FIG. 1). This constitutes a retracting device for moving the second slide 16 from the locked position to the unlocked position and retracting the second slide 16. In addition, the lock body 46
The protrusion surface of the engagement protrusion 48 formed on the end plate 72 side and the groove wall surface that engages with the protrusion surface of the engagement groove 52 formed on the second slide 16 are connected to the lock body 46.
Because the function of retracting the second slide 16 as the second slide 16 moves, it can be seen that the retracting device includes these protruding surfaces and groove wall surfaces.

A dog 96 is fixed to the piston rod 86 of the cylinder 84, and on the movement locus of the dog 96 are a limit switch LS ₁ that detects the backward limit position of the piston rod 86, and a limit switch LS ₂ that detects the forward/retracted position. are arranged, and these limit switches LS ₁ , LS ₂
is supported by a bracket 98 secured to end plate 72.

Next, the operation of the apparatus configured as above will be explained.

The workpiece W held in a lathe and rotated around the rotation center line A has already had its circumferential groove roughly cut, and the following describes the case where the groove wall surface of the workpiece W is finished cut with the cutting tool 28. Let's assume and explain. In the stage before cutting, the first slide 6 is at the original position, and the second slide 16 is also moved back relative to the first slide 6 and is at the retreating end position. Furthermore, piston rod 86
is at the forward limit position, and the toggle links 58, 6
4 is close to 180 degrees, and the lock body 46 is in contact with the stopper 54 (unlocked position).

When pressure oil is supplied to the port 94 of the cylinder 84 in response to the activation signal, the piston rod 86 retreats.
The sliding rod 68 connected thereto is also retracted. When the sliding rod 68 retreats, the two toggle links 5 are connected via the second pin 62 of the toggle mechanism.
8 and 64 are bent and the angle they make is 180
As shown in FIG. 1, the angle changes from a state close to .degree. to a slightly smaller angle, and the first pin 60 is drawn toward the fixed third pin 66, and the distance between the axes of both pins 60 and 66 becomes smaller. Therefore, the lock body 46 is slid inwardly (downward in FIG. 1) along the guide groove 44 via the first pin 60, and the lock body 46 is slid into the engagement groove 52 of the second slide 16 at the wedge angle β. The second slide 16 is advanced a certain distance toward the workpiece W relative to the first slide 9 by the engaging protrusion 48 of the lock body 46 that is engaged with the second slide 16 . The distance between the axes of the first pin 60 and the third pin 66 is the initial L
If the movement distance of the second slide ₁₆ at this time is (L - L ₁ ) tanβ
becomes.

Before the second slide 16 moves forward, as shown in FIG.
0 and the stopper 38 of the first slide 6, there is a clearance ξ between the second slide 1 and the stopper 38 of the first slide 6.
6 disappears by the forward movement of (L-L ₁ )tanβ, and the second slide 16 attempts to move further due to further inward movement of the lock body 46, but the stopper 38 prevents the second slide 16 from moving further. Since the second slide 16 is prevented from moving forward, the second slide 16 is stopped at its forward end position. Then, while the second slide 16 is in the forward end position in contact with the stopper 38, the second slide faces the wall surface of the guide groove 44 on the first slide 6 side and has a wedge angle β with respect to the wall surface. Since the lock body 46 is bitten into the wall surface of the engagement groove 52 on the second slide 16 side (locked position), the force in the direction of pushing the second slide 16 forward is maintained due to its wedge action. As a result, the second slide 16 is firmly locked (clamped) against the first slide 6 while receiving pressing force from the front and rear sides in its sliding direction by the stopper 38 and the locking body 46. This prevents the motor from retreating from the forward end position.
In particular, since the locking body 46 is interposed between the surfaces of the first slide 6 and the second slide 16 in surface contact, the locking action is reliable. Although the locking force varies considerably depending on the selection of the wedge angle β, the locking body 46 is interposed between the first and second slides 6, 16 at an angle less than the static friction angle. It is desirable that the wedge angle β be selected, for example, in the range of 15° or less, particularly in the range of 5° to 10°, so as to obtain the desired angle. If this is done, the frictional force between the lock body 46 and both slides 6 and 16 will cause
This is because the locked state of the slide 16 is maintained.

When the second slide 16 is locked (clamped) at the forward end position, the limit switch _LS1 is operated by the dog 96 to stop the retreat of the piston lock 86, and the first slide 6 locked by the second slide 16 is rapidly advanced in the direction B perpendicular to the rotation center line A of the work W by a driving device not shown, and the second slide 16 and the tool bit 28 are moved together with the first slide 6.
is brought close to the workpiece W. From the stage where the cutting tool 28 comes into contact with the cutting surface (groove wall surface) of the workpiece W,
The slide 6 feeds the cutting tool 28 at a comparatively slow speed to perform a groove finishing process on the workpiece W. A force is applied to the cutting tool 28 in a direction to move it backward due to the cutting resistance during the cutting process, but since the second slide 16 that holds the cutting tool 28 is firmly locked by the stopper 38 and the lock body 46 as described above, the cutting tool 28 is prevented from being moved backward, and a sufficient effect of preventing the cutting tool 28 from escaping is exhibited even when cutting hardened steel, which has a large cutting resistance.
Since the cutting tool 28 is supported by the first slide 6 on a wide plane, the supporting rigidity of the cutting tool 28 is extremely high. As a result, there is almost no deviation in the cutting edge position of the cutting tool 28 due to cutting resistance, making it possible to perform high-precision machining.

When the cutting process on the workpiece W is completed, the cutting feed by the first slide 6 is stopped, and then pressure oil is supplied to the port 92 of the cylinder 84, and a retracting operation, which is opposite to the above-mentioned locking operation, is started. That is, the first pin 6 of the toggle mechanism is moved forward by the piston rod 86 and the sliding rod 68.
Since the distance between the axes of the second slide 16 and the second slide 16 increases from _L1 to L, the lock body 46 is moved outward, thereby releasing the locking action of the lock body 46 on the second slide 16. At the same time, the second slide 16 is moved back from the forward end position where it was in contact with the stopper 38, and accordingly, the cutting tool 28 is moved from the cutting position where it is in contact with the cutting surface of the workpiece W to the cutting feed by the first slide 6. It is moved backward along direction C, which forms an acute angle α with direction B. The amount of retraction of the second slide 16 during this retracting operation is (L ₁ - L)tanβ, which is the same distance as the amount of advance previously, and when the second slide 16 is retracted by that amount, the lock body 46 is The second slide 16 comes into contact with the stopper 54 and is stopped at the rearward end position. As shown in FIG. 4, as the second slide 16 retreats, the cutting tool 28
By moving the second slide 16 backward from the cutting position along the sliding direction C (L ₁ -L) tanβ, the cutting edge moves away from the groove wall surface (finished surface) of the workpiece W by (L ₁ -L)tanβ・cosα They will be separated by a distance corresponding to . When such retraction is completed, the limit switch shown in Figure 1 is activated.
The LS ₂ is activated, and the first slide 6 holding the cutting tool 28 and the second slide 16 is quickly returned in a direction perpendicular to the rotation center line A of the work W by a drive device (not shown) together with them. , it is returned to its original position.

By the above retraction, the bite 28 and the work W
After a gap is secured between the two, the cutting tool 28 is quickly returned via the first slide 6. This prevents so-called return marks from being formed on the cutting surface of the workpiece W during the return process of the cutting tool 28, and also reduces the cutting feed. Because the retraction is not perpendicular to the direction of the workpiece, but in a direction inclined by an acute angle α, the cutting edge does not touch the bottom of the groove parallel to the axis of the workpiece. This prevents scratches from occurring. In addition, since this is not a conventional retracting device that rotates the cutting tool 28, there is no need to increase the second clearance angle of the cutting tool 28 to avoid interference with the workpiece W, and the durability of the cutting tool 28 is improved. improves.

Although one embodiment of the present invention has been described above, this is literally an example, and the present invention can be implemented in other embodiments.

Further, other mechanisms such as a rack and pinion may be used in place of the toggle mechanism to move the wedge-shaped locking member forward and backward. Further, as the stopper for defining the forward end position of the second slide, it is also possible to employ a stopper incorporating a fine adjustment device. In addition, the present invention can be applied not only to lathes but also to cutting tool support devices for other machine tools.

In addition, although specific explanations are omitted, it goes without saying that the present invention can be implemented with various modifications based on the knowledge of those skilled in the art, as long as they do not deviate from the scope of the claims for utility model registration.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a cutting tool support device according to an embodiment of the present invention, with a portion cut away. FIG. 2 is a longitudinal sectional view of the same device, and FIG. 3 is a diagram showing the main part of the - sectional view in FIG. 2.
FIG. 4 is an explanatory diagram illustrating the movement of the cutting tool during retraction in the same device. {2: Slide body, 10: Slide pedestal, 2
4: Cover plate} 6: First slide, 8: Guide groove, 16: Second slide, 26: Bit holder, 28: Bit (cutting tool), 30: Stopper contact body, 38: Stopper, 40: Drooping part , 44:
Guide groove, 46: Lock body (wedge-shaped lock member),
48: Engagement protrusion, 50: Second slide rear end, 5
2: Engagement groove, 54: Stopper, 58, 64: Toggle link, 60: First pin, 62: Second pin,
66: Third pin, 68: Sliding rod, 84: Cylinder, 86: Piston rod, W: Work.

Claims (1)

[Claims for Utility Model Registration] A first device that is attached to a machine tool and supports a cutting tool, which is provided with a cutting feed in at least one direction.
a slide; a second slide attached to the first slide so as to be linearly movable in a direction intersecting the cutting feed direction at an acute angle; and a second slide that holds a cutting tool in a tool mounting portion; a stopper that defines a forward limit of the second slide with respect to the first slide; and a stopper that is formed by two surfaces of the second slide and the first slide that face each other in the movement direction of the second slide. a wedge-shaped lock member that fits into a wedge-shaped gap, moves the second slide forward by a wedge action, and presses the second slide against the stopper to fix it at the forward end position; and a wedge-shaped lock member that is provided between the first slide and the wedge-shaped lock member; moving the wedge-shaped locking member from the unlocked position to the locked position to produce the locked condition of the second slide; moving the wedge-shaped locking member from the locked position to the unlocked position; and moving the second slide to the forward movement. A cutting tool supporting device with a retracting device comprising: a retracting device for retracting the cutting tool from the cutting position by retracting the cutting tool from an end position.