JP2021194762A - Work machine with position correction function - Google Patents

Abstract

To inhibit vibration of a tool effectively and minimize damage of a tool edge with a simple structure as soon as possible.SOLUTION: In a machine tool with a position correction function, a flat plate type spring member 46 is attached to a boring bar 20 and a tool cartridge 26. A second flat part 48b of the flat plate type spring member 46 is inserted into a second square hole 32b of a boring bar body 24 while a first flat part 48a of the flat plate type spring member 46 is inserted from a first square hole 32a of the boring bar body 24 into a square hole 44 of the tool cartridge 26.SELECTED DRAWING: Figure 4

Description

The present invention relates to a work machine with a position correction function, which supports a tool for machining an inner diameter and includes a tool cartridge that can be attached to a boring bar so as to be position correctable.

Generally, a tool attached to a tool holder, for example, various machine tools for processing a work through a machining tool are used. At that time, the machine tool is usually incorporated in a work machine having a function and a mechanism for working in conjunction with the operation of the machine tool.

For example, in the boring process of the cylinder bore constituting the engine block, a plurality of processes such as a roughing process and a semi-finishing process / finishing process are performed. In the finishing process (fine boring), in order to improve the shape accuracy and surface shape of the cylinder bore, it is necessary to process the inner cylinder diameter dimension with high accuracy on the order of microns. However, when mass production processing is performed, the cutting edge wear of the boring tool progresses as the processing work progresses. Therefore, in order to maintain the machining diameter tolerance in micron units, there is a need for a function that can correct the position of the cutting edge of the boring tool in micron units (diameter expansion side) in the radial direction. For example, Patent Document 1 discloses a tool assembly for boring that provides a tool cartridge having a larger adjustment range of a machining diameter.

In a boring processing apparatus having this kind of correction function, as shown in FIG. 13, a recess 2 is usually formed at the tip of the boring bar 1, and a tool cartridge 3 is inserted into the recess 2 via a fixing bolt 4. It is attached. A cutting tool (machining tip) 5 for machining the inner diameter is provided at the tip of the tool cartridge 3, and an adjusting bolt 6 for adjusting the machining diameter is screwed in the vicinity of the rear of the cutting tool 5. At the rear end of the tool cartridge 3, an adjusting bolt 7 for adjusting the position of the tool cartridge 3 in the machining axis direction (arrow L direction) is provided. The adjusting bolt 7 is used, for example, to adjust the position of each cutting edge when a multi-blade structure is adopted.

In such a configuration, when the adjust bolt 6 is screwed in the screwing direction via a wrench or the like (not shown), the tip of the adjust bolt 6 presses the mounting surface 1f which is the inner surface of the recess of the bowling bar 1. The rear end side of the tool cartridge 3 is firmly fixed to the boring bar 1 by the fixing bolt 4, and the tip side on which the cutting tool 5 is provided is elastic in the diameter expansion direction (in the direction of arrow Ru in FIG. 13). transform. Therefore, the cutting tool 5 is corrected for the machining diameter in response to the adjustment of the cutting edge in micron units and the wear of the cutting edge.

Japanese Unexamined Patent Publication No. 2001-205506

By the way, in the above tool cartridge 3, as shown in FIG. 14, a gap t is formed between the cartridge lower surface 3u at the tip and the mounting surface 1f of the bowling bar 1, and the two are not contact-bonded. ing. On the other hand, the side surface 3s of the tool cartridge 3 and the side surface 1s of the bowling bar 1 are partially in contact with each other at the most protruding portion.

Therefore, when the inner diameter of the work is machined by the cutting tool 5 under the rotational action of the boring bar 1, the force in the back component direction of the cutting resistance applied to the cutting tool 5 is passed through the adjusting bolt 6 to the boring bar 1. It rests on the mounting surface 1f. That is, the back component force of the cutting resistance is substantially received by the tip portion of the adjust bolt 6 at a point. On the other hand, the force in the main component force direction of the cutting resistance is received at the most protruding point between the side surface 3s of the side surface of the tool cartridge 3 and the side surface 1s of the boring bar 1.

When boring is performed in this state, strong and weak cutting resistance acts on the tool cartridge 3 due to changes in the machining allowance and machining surface, or the relationship between the machining portion of the cutting tool 5 and the flow of cutting powder. Become. At that time, although the rear end portion of the tool cartridge 3 is firmly fixed to the boring bar 1 by the fixing bolt 4, the tip portion of the tool cartridge 3 is in an elastically deformed state and is applied by the processing force. Vibration force is generated. When this exciting force is applied to the tip of the tool cartridge 3, the tool cartridge 3 vibrates finely while being elastically deformed, and the cutting back is in the direction of arrow A (see FIG. 14) with respect to the cutting main component force. It vibrates in the direction of arrow B (see FIG. 14) with respect to the component force.

At that time, the tool cartridge 3 vibrates according to its own natural frequency characteristic in the direction of arrow A and its own natural frequency characteristic in the direction of arrow B. In general, both have a high frequency of several thousand Hz, and this high frequency (vibration frequency) acts to hit the cutting edge of the cutting tool 5, and has a problem of accelerating damage to the cutting edge. In particular, in the above-mentioned Patent Document 1, there is no strong bolt-bonding surface, and there is a possibility that a further exciting force may be generated at the tip of the cartridge.

The present invention solves this kind of problem, and is a work machine with a position correction function that can satisfactorily suppress the vibration of the tool and reduce the damage of the tool cutting edge as much as possible with a simple configuration. The purpose is to provide.

The work machine with a position correction function according to the present invention supports a boring bar and a tool for inner diameter machining so as to be able to correct the position in the machining radial direction of the tool, and also has a tool cartridge attached to the boring bar and a flat plate shape. It is provided with a flat plate type spring member provided with an elastically deformed portion that bends or bends on the way. A hole is formed in the outer peripheral portion of the boring bar so as to intersect in the rotation axis direction of the boring bar, and a recess is formed in the tip portion of the tool cartridge substantially parallel to the hole. One end of the flat plate spring member is inserted into the hole, while the other end of the flat plate spring member is inserted into the recess.

In the work machine with a position correction function according to the present invention, the flat plate type spring member is inserted into the recess provided at the tip portion of the tool cartridge, and the tip portion is elastically pressed inward in the machining radial direction. There is. Moreover, the flat plate type spring member generates a frictional force with respect to the vibration in the machining direction of the tool with the tip portion of the tool cartridge. Therefore, a strong frictional force is generated at the contact portion between the tool cartridge and the flat plate type spring member, and a high damping force is generated. Moreover, the natural vibration characteristics of the tool cartridge and the natural vibration characteristics of the flat plate type spring member interact with each other, and good damping characteristics are newly generated. Therefore, it is possible to satisfactorily suppress the vibration of the tool and reduce the damage to the tool cutting edge as much as possible.

It is a perspective explanatory view of the machine tool which constitutes the work machine with the position correction function which concerns on 1st Embodiment of this invention. It is sectional drawing of the main part of the machine | machine. It is explanatory drawing of the tip side of the boring bar which constitutes the machine tool. It is sectional front view of the tip side of the boring bar. It is an exploded perspective view of the boring bar, a tool cartridge and a flat plate type spring member. It is a figure which shows the natural vibration spectrum of the said tool cartridge. It is a figure which shows the natural vibration spectrum of a flat plate type spring member. It is a figure which shows the natural vibration spectrum in the state which the flat plate type spring member and the tool cartridge are engaged. It is sectional drawing front view of the main part of the boring bar which constitutes the work machine with the position correction function which concerns on 2nd Embodiment of this invention. It is explanatory drawing of the tip side of the boring bar which shows the fixing state by another fixing bolt. It is sectional drawing explanatory drawing on the tip end side of the boring bar which shows the fixed state by the other fixing bolt. It is sectional drawing front view of the main part of the boring bar which constitutes the work machine with the position correction function which concerns on 3rd Embodiment of this invention. It is explanatory drawing of the boring bar which constitutes the conventional boring processing apparatus. It is explanatory drawing of the cutting resistance by the said conventional boring bar.

As shown in FIG. 1, the machine tool 10 which is a work machine with a position correction function according to the first embodiment of the present invention includes a main body portion 12, and a spindle housing 14 is attached to the main body portion 12 in the X-axis direction. , Is slidably mounted in the Y-axis direction and the Z-axis direction. As shown in FIG. 2, when the spindle (spindle) 16 is rotatably provided on the spindle housing 14 via the bearing 18, the boring bar 20 is detachably attached to the spindle 16. The boring bar 20 is attached to the machine tool 10 which is a machining center, but the boring bar 20 is not limited to this, and may be used for a dedicated machine (not shown).

The boring bar 20 has a shank portion 22 connected to the spindle 16, and the boring bar main body 24 is integrally provided with the shank portion 22. The tool cartridge 26 is attached to the outer peripheral portion on the tip side opposite to the shank portion 22 side (spindle 16 side) of the boring bar main body 24.

On the outer peripheral portion on the tip end side of the boring bar main body 24, a first wall surface 28a formed in the machining radial direction (arrow R direction) intersecting the rotation axis direction (machining axis direction) (arrow L direction) of the boring bar 20 and A second wall surface 28b formed in a processing direction intersecting the rotation axis direction and the processing radial direction, and a third wall surface 28c constituting the bottom surfaces of the first wall surface 28a and the second wall surface 28b are provided.

As shown in FIGS. 3 to 5, the outer peripheral portion on the tip end side of the bowling bar main body 24 is connected to the first outer wall surface 30a on the back surface side of the first wall surface 28a and to the first outer wall surface 30a via a step portion. A second outer wall surface 30b to be provided and a third outer wall surface 30c substantially orthogonal to the second outer wall surface 30b are provided. The outer peripheral portion on the tip end side of the boring bar main body 24 intersects the rotation axis direction of the boring bar 20, that is, extends in the machining direction (in the direction of arrow S in FIG. 4) and penetrates the first outer wall surface 30a. A first square hole (hole portion) 32a having a rectangular cross section is formed. A second square hole (hole) 32b having a rectangular cross section is formed on the outer peripheral portion of the boring bar main body 24 on the tip end side in parallel with the first square hole 32a and penetrating the second outer wall surface 30b. The first square hole 32a and the second square hole 32b may be set to various cross-sectional shapes as long as they correspond to the cross-sectional shape of the flat plate type spring member 46 described later. Further, the second square hole 32b does not have to be a through hole.

On the second wall surface 28b of the boring bar main body 24, a first bolt hole 34a that intersects and communicates with the second square hole 32b and a second bolt hole 34b located behind the first bolt hole 34a are formed. Will be done. The first fixing bolt 36a is screwed into the first bolt hole 34a, while the tip of the second fixing bolt 36b is screwed into the second bolt hole 34b.

The tool cartridge 26 has a substantially prismatic shape, and a cutting tool (tool) 38 for processing an inner diameter is fixed (supported) by various fixing structures such as screws and clamp pieces on the tip end side. An adjusting bolt 40 for adjusting the position of the cutting tool 38 attached to the tool cartridge 26 in the machining axis direction is engaged with the rear end surface of the tool cartridge 26. A bolt insertion hole 42 is formed on the rear end side of the tool cartridge 26. The tip of the second fixing bolt 36b inserted into the bolt insertion hole 42 is screwed into the second bolt hole 34b formed in the second wall surface 28b of the bowling bar main body 24, and the tool cartridge 26 is the bowling bar main body. It is fixed to 24.

A square hole (recess) 44 is formed on the side surface of the tool cartridge 26 on the tip end side so as to communicate with the first square hole 32a of the bowling bar main body 24. The square hole 44 may be a through hole if necessary. For example, an adjust bolt 45 with a hexagon socket screw is screwed onto the tip end side of the tool cartridge 26, and the tip of the adjust bolt 45 abuts on the second wall surface 28b of the ring bar main body 24.

A flat plate type spring member 46 is attached to the boring bar main body 24 and the tool cartridge 26. As shown in FIGS. 4 and 5, the flat plate type spring member 46 is a strong spring made of an alloy steel material such as a spring steel material, and has a thick and long arc shape. The flat plate type spring member 46 has a flat plate shape and is curved (or at a plurality of places) on the way with the first flat portion (the other end) 48a and the second flat portion (one end) 48b extending in parallel with each other. An elastically deformed portion 48c to be bent) is provided. The second flat portion 48b is longer than the first flat portion 48a and is set to a size smaller than the opening size of the second square hole 32b of the boring bar main body 24, and as will be described later, the second square hole It is inserted and arranged in 32b. The first flat portion 48a is set to a size smaller than the opening size of the first square hole 32a of the bowling bar main body 24 and the opening size of the square hole 44 of the tool cartridge 26, and as will be described later, the first square hole 32a is set. And is inserted and arranged in the square hole 44 (engagement portion between the tool cartridge 26 and the flat plate type spring member 46).

The first flat portion 48a of the flat plate type spring member 46 is provided with a first inclined surface 50a that is inclined in a direction away from the second flat portion 48b toward the tip end on the inner surface facing the second flat portion 48b. .. The second flat portion 48b of the flat plate type spring member 46 is provided with a second inclined surface 50b that is inclined in a direction away from the first flat portion 48a toward the tip end on the inner surface facing the first flat portion 48a. .. The second flat portion 48b is formed with a recess (for example, a tapered surface) 50c to which the first fixing bolt 36a is engaged. The first inclined surface 50a, the second inclined surface 50b, and the recess 50c may be provided as needed, and may be set to various shapes.

The installation work of the flat plate type spring member 46 is performed as follows. First, in the flat plate type spring member 46, the first flat portion 48a and the second flat portion 48b are normally slightly inclined in a direction close to each other in a state where no external force is applied (no load state). .. The first flat portion 48a and the second flat portion 48b may be parallel to each other in a no-load state. At that time, the first square hole 32a and the second square hole 32b may be slightly inclined in a direction in which they are separated from each other in the direction of inserting the spring member.

Therefore, while the tip of the first flat portion 48a is slightly inserted into the first square hole 32a, the elastically deformed portion 48c is inserted into the second square hole 32b while the tip of the second flat portion 48b is inserted into the second square hole 32b. Be beaten by. Therefore, the first flat portion 48a is inserted into the first square hole 32a under the guiding action of the first inclined surface 50a, and further inserted into the square hole 44 of the tool cartridge 26. At that time, one side (inward facing side) of the first flat portion 48a slides in a state of being pressed against the wall surface of the first square hole 32a and the wall surface of the square hole 44. On the other hand, the second flat portion 48b is inserted into the second square hole 32b under the guiding action of the second inclined surface 50b. At that time, one side (inward-facing side) of the second flat portion 48b slides in a state of being in pressure contact with the wall surface of the second square hole 32b.

Therefore, the flat plate type spring member 46 is attached to the boring bar main body 24 and the tool cartridge 26 so that the first flat portion 48a and the second flat portion 48b are pushed apart from each other. As a result, even a flat plate type spring member 46 having strong spring rigidity can be easily and surely incorporated. Moreover, the tip of the first fixing bolt 36a abuts on the recess 50c of the flat plate type spring member 46 to prevent the flat plate type spring member 46 from coming off. Since the second square hole 32b is a through hole, the operation of taking out the flat plate type spring member 46 can be easily performed by inserting a tool from the tip of the second flat portion 48b.

The operation of the machine tool 10 according to the first embodiment thus configured will be described below.

As shown in FIG. 2, when the spindle 16 constituting the machine tool 10 is rotationally driven, the boring bar 20 is rotated integrally with the spindle 16. A tool cartridge 26 is attached to the boring bar 20, and the cutting tool 38 of the tool cartridge 26 processes (inner diameter processing) the inner peripheral surface of a work (not shown) under the rotational action of the boring bar 20. Next, when the cutting edge of the cutting tool 38 is worn due to the machining work, the cutting tool 38 is position-adjusted (corrected) outward in the machining radial direction via the adjust bolt 45.

In this case, in the first embodiment, the flat plate type spring member 46 is attached to the boring bar main body 24 and the tool cartridge 26 by being inserted in a spread state. Specifically, one side of the second flat portion 48b constituting the flat plate type spring member 46 is arranged in a state of being pressed against the wall surface of the second square hole 32b formed in the bowling bar main body 24. On the other hand, one side of the first flat portion 48a constituting the flat plate type spring member 46 is pressed against the wall surface of the first square hole 32a formed in the bowling bar main body 24 and the wall surface of the square hole 44 formed in the tool cartridge 26. It is arranged in the state of being. Therefore, the tool cartridge 26 elastically presses the tip portion inward in the machining radial direction due to the strong spring rigidity of the flat plate type spring member 46. Therefore, the vibration acting in the arrow B direction (machining radial direction) shown in FIG. 14 is satisfactorily reduced.

Moreover, the flat plate type spring member 46 generates a frictional force with respect to the vibration of the cutting tool 38 in the machining direction (in the direction of arrow A in FIG. 14) with the tip portion of the tool cartridge 26. As a result, a strong frictional force is generated at the contact portion between the tool cartridge 26 and the flat plate spring member 46, and a high damping force is generated. Due to the action of this damping force, the damping characteristics of the tool cartridge 26 attached to the boring bar main body 24 are satisfactorily improved.

By the way, as a method of displaying the natural vibration characteristics of the tool cartridge 26 having a spring property, the ratio of the input value obtained by applying a force to the target object by impact vibration and the output value appearing by being excited by the vibration force is set. A method of expressing the frequency spectrum as a transfer function is known. At that time, if there is even one phenomenon in which the vibration peak rises sharply at a place having remarkable natural vibration characteristics, the value of modal flexibility deteriorates, and not only the high frequency vibration of the cutting edge of the cutting tool 38 but also the non-high frequency vibration occurs. Stable processing conditions and chattering are likely to occur. On the other hand, those having a frequency spectrum in which a remarkable natural frequency peak does not stand or the peak is smooth are in a relatively stable processing state.

Therefore, FIG. 6 is a diagram showing a spectrum obtained by measuring the natural frequency of the tool cartridge 26 to which the flat plate type spring member 46 is not attached. In this spectral diagram, in the low frequency range to the middle frequency range, a remarkable peak value does not appear and it is almost flat, while a remarkable natural frequency peak value appears in the high frequency range. As a result, the value of modal flexibility deteriorates, and unstable processing states, chattering, and the like are likely to occur.

FIG. 7 is a diagram showing a spectrum obtained by measuring the natural frequency of the flat plate type spring member 46 alone. In this spectral diagram, a remarkable peak value appears in the medium frequency region, while a gentle and high peak value appears in the high frequency region.

On the other hand, FIG. 8 is a diagram showing a spectrum of natural frequencies measured in a state where the flat plate type spring member 46 and the tool cartridge 26 are firmly engaged (see FIGS. 3 and 4). By coupling two members having significantly different natural frequency characteristics, that is, the flat plate type spring member 46 and the tool cartridge 26, they act to cancel each other's remarkable natural frequency characteristics. Therefore, as shown in FIG. 8, from the low frequency region to the high frequency region, a flat spectrum characteristic in which a remarkable peak value does not appear is exhibited, a stable processing state can be obtained, and chattering and the like are less likely to occur. Can be secured.

As described above, in the first embodiment, simply by attaching the flat plate type spring member 46 having a simple structure to the boring bar main body 24 and the tool cartridge 26, a large frictional force is generated with a high contact force and the natural vibrations of each other are generated. The effect that the characteristics interact with each other and good damping characteristics are newly generated can be obtained. Therefore, with a simple configuration, it is possible to apply a good pressing frictional force to the tool cartridge 26, improve the damping characteristics, and improve the machining stability and the durability of the cutting tool 38.

FIG. 9 is a front sectional view of a main part of a boring bar 100 constituting a work machine with a position correction function according to a second embodiment of the present invention. The same components as the boring bar 20 (shown in FIG. 4) of the machine tool 10 according to the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

A square hole (hole) 32 having a rectangular cross section extends in the machining direction (in the direction of arrow S in FIG. 9) on the outer peripheral portion on the tip end side of the boring bar main body 102 constituting the boring bar 100. .. A first bolt hole 106, which is located on the back surface side of the tool cartridge 104 and intersects and communicates with the square hole 32, is formed on the outer peripheral portion on the tip end side of the boring bar main body 102. The first fixing bolt 36a is screwed into the first bolt hole 106. A square hole 44a is formed on the tip end side of the tool cartridge 104 on the side surface opposite to the square hole 44 (see FIG. 4).

The flat plate type spring member 46 is attached to the boring bar main body 102 and the tool cartridge 104 by being inserted in a spread state. At that time, one side (inward facing side) of the first flat portion 48a is arranged in a state of being pressed against the wall surface of the square hole 44a formed in the tool cartridge 104. On the other hand, one side (inward facing side) of the second flat portion 48b is arranged in a state of being pressed against the wall surface of the square hole 32 formed in the bowling bar main body 102. The flat plate type spring member 46 is arranged in the opposite posture to that of the first embodiment, that is, the elastic deformation portion 48c is arranged on the cutting tool 38 side.

In this case, in the second embodiment, the flat plate type spring member 46 is attached to the boring bar main body 102 and the tool cartridge 104 so as to be expanded. Therefore, with a simple configuration, it is possible to apply a good pressing frictional force to the tool cartridge 104, improve the damping characteristics, and improve the machining stability and the durability of the cutting tool 38. The same effect as that of the first embodiment can be obtained.

In the first and second embodiments, the second fixing bolt 36b for fixing the tool cartridges 26 and 104 to the boring bar main bodies 24 and 102 applies a tightening force in a direction orthogonal to the machining direction of the cutting tool 38. However, it is not limited to this. As shown in FIGS. 10 and 11, for example, in the boring bar 20, the tool cartridge 26 may be fixed to the boring bar main body 24 via a second fixing bolt 110 that is tilted.

The tool cartridge 26 is formed with an inclined hole portion 112 for accommodating the second fixing bolt 110, and the boring bar main body 24 is formed with a second bolt hole 114 coaxially communicating with the inclined hole portion 112. To. The second fixing bolt 110 is housed in the inclined hole portion 112, and the tip portion is screwed into the second bolt hole 114, so that the two surfaces 26m1 and 26m2 orthogonal to each other of the tool cartridge 26 are formed on the boring bar main body 24. It is pressed and held by the first wall surface 28a and the second wall surface 28b. Even with such a configuration, the same effects as those of the first and second embodiments described above can be obtained. The third embodiment described below may also be configured in the same manner.

FIG. 12 is a front sectional view of a main part of a boring bar 120 constituting a work machine with a position correction function according to a third embodiment of the present invention. The same components as those of the boring bar 110 (shown in FIG. 9) according to the second embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

A tool cartridge 104 is attached to the outer peripheral portion on the tip end side of the boring bar main body 122 constituting the boring bar 120. The boring bar main body 122 is provided with a side surface 122s on substantially the same surface as the side surface 104s on the cutting tool 38 side of the tool cartridge 104, and a square hole (hole) 124 is formed in the side surface 122s. The square hole 124 is set to substantially the same depth as the square hole 44a of the tool cartridge 104.

A flat plate type spring member 126 is attached to the boring bar main body 122 and the tool cartridge 104. The flat plate type spring member 126 is a strong spring made of an alloy steel material such as a spring steel material, and has a U-shape or a C-shape having a thick and arc-shaped elastic portion. The flat plate type spring member 126 has a flat plate shape, is parallel to each other and has substantially the same length, and extends with a first flat portion (the other end) 128a and a second flat portion (one end) 128b. An elastically deformed portion 128c that bends (or bends at a plurality of places) is provided.

The second flat portion 128b is provided with a locking convex portion 130 projecting from the first flat portion 128a on the inner surface facing the first flat portion 128a. The flat plate type spring member 126 is attached to the tool cartridge 104 and the boring bar main body 122 in a spread state. Specifically, one side of the first flat portion 128a is arranged in a state of being pressed against the wall surface of the square hole 44a formed in the tool cartridge 104. On the other hand, one side of the second flat portion 128b is arranged in a state of being pressed against the wall surface of the square hole 124 formed in the bowling bar main body 122. The locking convex portion 130 is abutted against the inner surface of the square hole 124 of the bowling bar main body 122, and has a function of preventing the flat plate type spring member 126 from coming off.

In this case, in the third embodiment, the flat plate type spring member 126 is attached to the boring bar main body 122 and the tool cartridge 104 so as to be expanded. Therefore, with a simple configuration, it is possible to apply a good pressing frictional force to the tool cartridge 104, improve the damping characteristics, and improve the machining stability and the durability of the cutting tool 38. The same effect as that of the first and second embodiments can be obtained.

10 ... Machine tool 14 ... Spindle housing 16 ... Spindle 20, 100, 120 ... Boring bar 24, 102, 122 ... Boring bar body 26, 104 ... Tool cartridge 28a-28c ... Wall surface 32, 32a, 32b ... Square hole 36a, 36b , 110 ... Fixing bolt 38 ... Cutting tool 44, 44a, 124 ... Square hole 45 ... Adjusting bolt 46, 126 ... Flat plate type spring member 48a, 48b, 128a, 128b ... Flat portion 48c, 128c ... Elastically deformed portion 50a, 50b ... Inclined Surface 50c ... Concave part 130 ... Locking convex part

Claims (8)

With a boring bar,
A tool for machining the inner diameter is supported so that the position can be corrected in the machining radial direction of the tool, and a tool cartridge attached to the boring bar and a tool cartridge.
A flat plate type spring member having a flat plate shape and provided with an elastically deformed portion that bends or bends on the way.
Equipped with
A hole is formed in the outer peripheral portion of the boring bar so as to intersect in the rotation axis direction of the boring bar.
A recess is formed in the tip portion of the tool cartridge substantially parallel to the hole.
A work machine with a position correction function, wherein one end of the flat plate spring member is inserted into the hole, while the other end of the flat plate spring member is inserted into the recess. In the work machine according to claim 1, the flat plate type spring member is curved or bent in a substantially U shape from one end to the other end, and is a work machine with a position correction function. .. In the work machine according to claim 1, the tool cartridge and the flat plate type spring member have different natural frequency characteristics and have different natural frequency characteristics.
A work machine with a position correction function, wherein the tool cartridge and the flat plate type spring member have an engaging portion that cancels each other's characteristics of the natural frequency by engaging with each other. In the work machine according to claim 2, the one end portion of the flat plate type spring member has a first inclined surface that is inclined toward the tip end in a direction away from the other end portion on an inner surface facing the other end portion. Is provided and
The other end of the flat plate type spring member is provided with a second inclined surface that is inclined in a direction away from the one end toward the tip on the inner surface facing the one end.
The flat plate type spring member is characterized in that it is attached to the boring bar and the tool cartridge in a state where the one end portion and the other end portion are pressurized in a direction to be separated from each other. With work machine. In the work machine according to claim 2, the one end portion of the flat plate type spring member is provided with a locking convex portion protruding from the other end portion on an inner surface facing the other end portion.
The flat plate type spring member is characterized in that it is attached to the boring bar and the tool cartridge in a state where the one end portion and the other end portion are pressurized in a direction to be separated from each other. With work machine. The work machine according to claim 1, wherein the boring bar is screwed with a fixing bolt for holding the one end portion inserted into the hole portion. The work machine according to claim 6, wherein a recess for engaging the fixing bolt is formed at one end of the flat plate type spring member. In the work machine according to claim 2, the boring bar is formed with a hole in which the other end of the flat plate spring member is inserted substantially parallel to the hole. Work machine with correction function.

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