JP2001170807A - Holder for throw-away tip with sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a holder capable of favorably holding a throw-away tip with a wear sensor. SOLUTION: A pocket is formed on a tip mounting part 4 on a head end of a holder 1. A probe insertion hole 19 is formed on a deep side surface of the pocket 5. A probe 41 fixed by a probe fixture 44 is mounted on this probe hole 19. A probe 21 is rarely broken as the probe 41 is not influenced upon even in the case when the throw-away tip is damaged, etc. It is possible to make the probe 41 a holder free to favorably electrically connect to the wear sensor of the throw-away tip 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holder for holding a throwaway tip with a wear sensor. In particular, the present invention relates to a holder having a probe electrically connectable to a wear sensor of a throw-away tip.

[0002]

2. Description of the Related Art Conventionally, it has been proposed that a tool life is automatically determined by detecting a wear amount of a cutting edge of a cutting tool. For example, Japanese Utility Model 3-120
No. 323, the flank of the throwaway tip,
It is disclosed to provide a sensor line with a conductive film along a cutting edge. It is also disclosed that the width of the sensor line corresponds to the allowable wear width. Therefore, according to the throw-away tip disclosed in this publication, the sensor line is worn with the wear of the cutting edge, and it is possible to determine that the life of the cutting edge has reached when the sensor line is interrupted.

[0003] Also, JP-A-9-38846 discloses that
For ordinary cutting tools that are not indexable inserts,
A method has been proposed in which a thin film circuit is provided on the flank surface, and a method of automatically determining the life of the cutting tool by detecting that the electrical resistance changes as the thin film circuit wears with the wear of the flank surface has been proposed. I have.

[0004]

A method of forming a sensor line of a conductive film on a flank along a cutting edge and detecting a change in resistance value of the line detects the wear of the cutting edge. This is the preferred method. However, when this method is used for a throw-away insert, there is a problem that even if a sensor line is provided along the cutting edge, it is practically difficult to connect the sensor line to an external detection circuit or the like. Encounter.

More specifically, a throw-away tip is a disposable tip, and its size is 1 cm.
Less than ^three small things. The chip performs cutting while being exposed to a cutting fluid (water or oil) and chips. Under such an environment, a technique of connecting a sensor line formed on a small throw-away chip to an external detection circuit or the like without hindrance has not been realized. Also, even if a lead wire for extracting a signal from the sensor line of the throw away tip is provided in the holder of the throw away tip, the lead wire does not come into contact with the chip being processed, and the lead wire does not break. It must be provided and such a holder has not been put to practical use.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a holder capable of favorably holding a throw-away tip with a wear sensor.

[0007]

Means for Solving the Problems and Effects of the Invention The invention according to claim 1 is a holder having a shank attached to a tool post and a tip mounting portion provided at the tip of the shank, wherein the tip mounting portion has A pocket for fixing and holding the sensor-attached throw-away tip is formed, and this pocket is connected to the upper surface, the front face continuing to the front flank of the throw-away tip, and the lateral flank of the throw-away tip to the tip mounting portion. One side surface is open, the bottom surface is a seating surface on which the lower surface of the throw-away tip is placed, the rear surface, and the other side surface are constraining surfaces against which the side surfaces of the throw-away tip abut, respectively. A probe insertion hole is formed in the tip mounting portion and opens to the restraining surface. The sensor of the way chips are electrically connected to the pair of features that throwaway holder throwaway holder chip with the sensor chip with a sensor that the probe is provided is.

According to a second aspect of the present invention, there is provided a holder for a throwaway tip with a sensor according to the first aspect, wherein a lead wire wired in a groove formed in the holder is connected to a rear end of the probe. It is a feature. According to a third aspect of the present invention, in the holder for a throwaway tip with a sensor according to the first or second aspect, the pair of probes are arranged side by side on one of two restraining surfaces.

According to a fourth aspect of the present invention, there is provided a holder for a throwaway tip with a sensor according to any one of the first to third aspects, further comprising a probe fixing member formed of an insulating material for fixing the pair of probes. It is characterized by having. Usually, when the indexable insert is mounted on the holder, the two side surfaces of the insert are constrained by the constraining surface so that the insert does not rattle or displace during cutting.

[0010] In the configuration of claim 1, the probe insertion hole is
It is formed on the constraint surface of the chip mounting portion. When the probe insertion hole is formed on the constraint surface of the tip mounting part, even if the indexable tip breaks or breaks during cutting processing,
There is an effect that damage to the probe is small. In other words, the indexable insert attached to the holder is cut using the top and side flank. For this reason, during cutting, stress mainly concentrates on the top portion and the lateral flank of the throw-away tip, and this stress may damage or break the top portion and the lateral flank side of the throw-away tip. Further, stress tends to concentrate on the side surface connected to the lateral flank of the throw-away tip, and when the throw-away tip is damaged, the side surface is easily affected.

Therefore, if the probe insertion hole is formed in the constraint surface of the tip mounting portion as in the first aspect, even if the indexable tip is broken, the probe is not affected, and the probe is not affected. Less likely to break. Further, in the chip mounting state, the constraint surface of the chip attaching portion is in contact with or in close contact with the two side surfaces of the chip, so that the constraint surface is not exposed to the outside. Therefore, by providing a probe that can be electrically connected to the sensor on the restraining surface, the tip is electrically connected to the sensor of the throw-away tip with the sensor, and the sensor and the probe are connected well without being exposed to the outside Is done. Thus, the connection between the sensor and the probe is kept good even while cutting is performed by the throw-away tip, and a change in the resistance of the sensor or the like can always be accurately detected.

According to the second aspect of the present invention, since the lead wire is wired in the groove formed in the holder, the lead wire is not exposed from the holder, and the lead wire changes the direction in which chips are discharged. It does not adversely affect the chip dischargeability, such as preventing discharge. Further, a pair of probes can be arranged side by side on one of the two restraining surfaces. With this configuration, the structure for disposing the probe can be simple. This is because if they are arranged side by side on one side of the restraining surface, two adjacent
This is because the processing for forming the probe hole is easier than in the case where the probe insertion hole is provided in each of the two constraint surfaces.

Further, since it is necessary to connect to an external detection circuit, it is necessary to connect a lead wire to the probe. In this case, since the lead wire can be attached at one time, two sides are required. This operation can be performed more easily than when a pair of probes are provided. According to the configuration of the fourth aspect, the probes can be easily fixed, and can be fixed to each other and to the chip mounting portion in an insulated state.

In particular, when the configuration of claim 3 is adopted, only one probe fixing tool needs to be used as long as a through hole through which a pair of probes is inserted is provided. Thereby, the cost can be further reduced.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings. FIG.
1 shows a holder 1 for a throwaway tip according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the holder 1 shown in FIG. Referring to FIGS. 1 and 2, holder 1 is for holding indexable insert 2. The holder 1 has a shank 3 attached to a tool post (not shown), and a tip mounting portion 4 integrally formed with the shank 3 at the tip of the shank 3. The shank 3 extends longitudinally to the right in FIGS. 1 and 2, but the rear portion is omitted here for convenience of description.

The holder 1 is made of an alloy steel, and its material type is chromium-molybdenum steel, nickel-chrome steel,
Alloys based on alloy steels such as nickel-chromium-molybdenum steels and carbon alloy steels containing iron, containing five elements of C, Si, Mn, P and S, with chromium, tungsten, manganese, molybdenum, vanadium, etc. added It can be made of steel or the like. A pocket 5 is formed in the chip mounting portion 4. The pocket 5 is a concave notch in which the upper surface, the front surface, and one side surface (the front side surface in the figure) are opened with respect to the chip mounting portion 4. The bottom surface 6 of the pocket 5 is a seating surface on which the throw-away tip 2 is placed via the seat 42. Further, the rear surface and the other side surface (the rear side surface in the figure) of the pocket 5 are respectively a rear restraint surface 7 and a rear restraint surface 8 with which the side surface of the throw-away tip 2 abuts.
It has become.

The sheet 42 is a protective member for preventing a large loss of the throw-away tip 2 from reaching the holder 1. Sheet 42
Is made of cemented carbide. The sheet 42 is substantially equal to the planar shape of the throw-away tip 2 and has a substantially square planar shape, and has a hole 43 formed at the center thereof so that the action portion 11 of the lever 10 can protrude. The pocket 5 further has a lever groove 9 formed on the bottom surface 6 thereof. The lever groove 9 accommodates a lever 10 having an L-shaped side surface. The lever 10 has a cylindrical action portion 11 extending upward and a force point portion 12 extending laterally from below the action portion 11, and a boundary between the action portion 11 and the force point portion 12 becomes a fulcrum portion 13. ing.

A clamp hole 14 is formed in the tip mounting portion 4 adjacent to the pocket 5, more specifically, adjacent to the intersection between the rear restraint surface 7 and the back restraint surface 8. The clamp hole 14 is a hole that penetrates the chip mounting portion 4 from the upper surface to the lower surface, and is threaded on the upper inner peripheral surface of the hole. The middle part thereof communicates with the lever groove 9. A clamp bolt 15 is screwed into the clamp hole 14 from below. The clamp bolt 15 is a screw cylinder 16 having a threaded peripheral surface.
And an unthreaded column cylinder 17, and the screw cylinder 1
6 and the cylinder 17 are connected vertically by a small-diameter cylinder 18.

When the lever 10 is set in the lever groove 9 with the clamp bolt 15 screwed into the clamp hole 14, the point of force 12 is moved to the small diameter cylinder 18 in the clamp hole 14.
Fits into the voids created by the And clamp bolt 15
Is moved up and down by screwing, the power point portion 12 of the lever 10 engaged with the small diameter barrel 18 is moved up and down. As a result, the lever 10 swings about the fulcrum 13 and the lever 1
The zero acting portion 11 is displaced between a state in which the throwaway tip 2 is fixed between the rear restraint surface 7 and the rear restraint surface 8 so as to be sandwiched therebetween, and a state in which the throwaway tip 2 can be replaced. Therefore, after the tip 2 is set on the action portion 11 of the lever 10, the screwing amount of the clamp bolt 15 is adjusted with, for example, a hexagon wrench,
The throw-away tip 2 has a rear restraint surface 7 and a back restraint surface 8.
And become bound by.

The pocket 5 further has a probe insertion hole 19 formed in the back restraining surface 8. A pair of probes 41 are accommodated in the probe insertion hole 19. The pair of probes 41 are fixed to the chip mounting portion 4 in an insulated state by one probe fixing tool 44. FIG. 3A is an enlarged perspective view of a probe fixing tool 44 for fixing the probe 41, and FIG.
A cross-sectional view of the probe fixture 44 and the probe 41 fitted to the probe fixture 44 are illustrated.

Referring to FIG. 3A and FIG. 3B,
The probe fixture 44 is made of, for example, a heat-resistant and insulating resin. The probe fixture 44 has a base 44A having a substantially rectangular planar shape and a protrusion 44B protruding from the base 44A. The probe fixture 44 is formed with two probe insertion holes 54 for holding the pair of probes 41 at fixed intervals. Each probe insertion hole 54 penetrates the base portion 44A and the protruding portion 44B, and the lower portion shown in FIG. 3 is tapered so that the probe 41 can be easily inserted. The inner diameter of the probe insertion hole 54 matches the thickest outer diameter of the probe 41, and the probe 41 can be inserted into the probe insertion hole 54 from below as shown in FIG. it can. After insertion, the probe 41
The tip 41a of the probe 41 projects from above the probe fixture 44 shown in FIG. 3B, and the connection end 41b of the probe 41 projects from below the probe fixture 44 shown in FIG. 3B.

When the probe 41 is inserted into the probe fixture 44, the probe 41 is attached to the tip attaching portion 4 in an insulated state. FIG. 4 is a view of FIG. 2 viewed from the direction of arrow A. For convenience of explanation, FIG. 4 shows a part of the upper part of the chip mounting portion 4 cut away. FIG.
With reference to (a), the probe insertion hole 19 is
And a pair of probe accommodating holes 19B (only one is shown in FIG. 4 (a)) that opens into the inner surface of the fitting recess 19A. The fitting recess 19A is for fitting the base 44A of the probe fixture 44,
The probe housing holes 19B are for fitting the respective projecting portions 44B of the probe fixture 44.

The upper portion of the rear side surface 40C of the chip mounting portion 4 is further partially divided into a removable cover 46. The cover 46 is attached to the chip mounting portion 4.
Are fixed by, for example, bolts 47.
A concave notch 4 into which the cover 46 is fitted is provided on the rear side surface 40C.
8 are formed. Although not shown, a groove is formed in the back side of the holder 1 and two lead wires 51 are formed in this groove.
Are arranged. An outlet 49 communicating with the lead wire groove is opened at, for example, a side surface of the recess 48.
The concave portion 48 is a space for leading out the lead wire 51.

Further, from the rear end of the probe insertion hole 19B of the probe insertion hole 19, a rear surface 48A of the concave notch 48 is formed.
Is formed. And FIG.
By fitting the probe fixture 44 into the probe insertion hole 19 as shown in (b), the probe 41 can be securely fixed. When the probe fixture 44 is fitted, the connection end 41b of the probe 41 is accommodated in the hole 50, and the front surface of the probe fixture 44 (shown in FIGS. 3A and 3B). (Upper surface) is substantially flush with the back restraint surface 8. In this state, the tip 41a of the probe 41
Slightly protrudes laterally from the back restraint surface 8 and the probe 4
1 and is elastically urged in the lateral direction by a spring or the like built in.
In this embodiment, of the pair of probes 41,
Probe 41 arranged on the left side in FIGS. 1 and 2
Is arranged slightly above.

For this reason, when the throw-away tip 2 is placed on the sheet 42, the tip 4 of the probe 41 contacts the sensor contact portion provided on the side surface of the throw-away tip 2.
1a elastically contacts. Thereby, the resistance of the wear sensor of the throw-away tip 2 can be taken out to the external resistance measuring device 52 by the probe 41 and the lead wire 51 connected to the probe 41. In addition, the upper portion of the inner side surface 40C of the tip mounting portion 4 is configured to be partly divided to form a removable cover 46,
The lead wire is drawn out from the distal end of the outlet 49, and there is an advantage that the work for electrical connection between the lead wire 51 and the connection end 41b of the probe 41 can be easily performed by removing the cover 46.

The cover 46 is secured to the chip mounting portion 4 with bolts 47.
, The connection between the probe 41 and the lead wire 51 is completely hidden, and there is no hindrance to the cutting operation.
In the above-described embodiment, the workpiece (the metal workpiece to be cut) is cut while being rotated from the direction of the side surface 40B with respect to the indexable insert 2,
Cutting is performed by sending the holder 1 toward the front surface 40A. In this case, the cutting edge 202 formed on the upper edge of the nose portion 200 and the lateral flank 201 of the throw-away tip 2 located on the left front side in FIG. 1 is mainly used for cutting. For this reason, stress mainly occurs on the rake face 203 of the throw-away tip 2 adjacent to the cutting edge 202 directly contributing to the cutting and the cutting edge 202 colliding with the chips generated during the cutting, and a high temperature is generated. The stress generated in the indexable insert 2 causes the cutting edge 202
At the same time, the rake face 203 wears, but sometimes the chipping may occur, or the indexable tip 2 may be damaged due to the chipping. That is, the chipping or the like is likely to occur on the rake face 203 and the lateral flank 201 of the cutting portion used by the chip 2. Similarly, also in the tip mounting portion 4 of the holder 1, stress tends to concentrate on the side surface 40B located below the rake face 203 of the throw-away tip 2, and when the throw-away tip 2 is damaged, the side face 40B easily influenced.

Therefore, in this embodiment, the probe insertion hole 19 is formed in the back restraint surface 8 of the tip 2 which is not easily affected when a defect or the like occurs in the indexable tip 2. When the probe insertion hole 19 is formed in the back restraint surface 8 of the tip mounting portion 4 as described above, even if the throw-away tip 2 is damaged, there is little possibility that the probe 41 in the probe insertion hole 19 is broken. This is a feature of this embodiment.

The features of this embodiment will be more generally described. In a holder for fixing and holding a throw-away tip, when a throw-away tip is attached, a probe is provided on a restraining surface for restraining the throw-away tip. The feature is that an insertion hole is formed. Further, a simple structure for disposing the probe 41 is sufficient. This is because, in order to arrange the pair of probes 41 side by side on the back restraining surface 8, the probe holes 19 only have to be formed on one surface, and the processing for forming the probe holes 19 becomes relatively easy. It is. Further, in this case, since the lead wire 51 can be attached to the connection end 41b of the probe 41 at one time, the operation for providing the probe 41 can be easily performed.

Next, another embodiment of the present invention will be described. FIG. 5 shows a holder 1A according to another embodiment of the present invention.
FIG. 3 is an exploded perspective view of FIG. In FIG. 5, the same reference numerals are given to the same or equivalent parts as those in the above-described configurations of FIGS. 1 and 2, and the description is omitted. The difference between the holder 1A according to this embodiment and the holder 1 according to the above-described embodiment is that the probe 61
And the rear restraint surface 8. Specifically, probe insertion holes 62 are formed in the rear restraint surface 7 and the back restraint surface 8, respectively, and a pair of probes 61 are fixed by two probe fixing members 63.

FIG. 6 is a sectional view of an essential part for describing a probe fixing tool 63 according to this embodiment and a probe 61 fitted to the probe fixing tool 63. Each probe fixture 63 has a base portion 63A having a substantially square planar shape.
And a protrusion 63B protruding from the base 63A. One probe insertion hole 64 that penetrates the base portion 63A and the protruding portion 63B is formed in the probe fixture 63. The probe insertion hole 64 is tapered so that the upper part shown in FIG. 6 can easily insert the probe 61. The inner diameter of the probe insertion hole 64 is
The probe 61 can be inserted into the probe insertion hole 64 from above as shown in FIG. After insertion, the tip 61a of the probe 61 projects from above the probe fixture 63 as shown in FIG. 6, and the connection end 61b of the probe 61 projects from below the probe fixture 63 as shown in FIG.

Referring to FIG. 7, in this embodiment, a lead wire groove 65 in which lead wire 51 is provided is formed on the back side of back restraint surface 8. A communication groove 66 that communicates with the lead wire groove 65 is formed from the far end of the probe insertion hole 62. By fitting each probe fixture 63 into the probe insertion hole 62, the probe 61 can be securely fixed. Probe 61 provided on back restraint surface 8
In, the lead wire 51 extracted from the lead wire groove 65 is electrically connected to the connection end 61b of the probe 61 protruding from the probe fixture 63. Also, the rear restraint surface 7
Wire 51 connected to a probe 61 provided in
Are drawn out of the same lead wire groove 65.

After the probe fixture 63 is inserted, one end 61a of the pair of probes 61 slightly projects laterally from the back restraint surface 8 and the other end 61a.
a slightly projects laterally from the rear restraint surface 7. The distal end 61a of each probe 61 is elastically biased toward the near side and the left side shown in FIG. 5 by a spring or the like built in the probe 61. When the throw-away tip 2 is placed on the sheet 42, the tip 61 a of the probe 61 elastically contacts a sensor contact portion provided on a side surface of the throw-away tip 2. Thereby, the throw away tip 2
The resistance of the wear sensor of the probe 61 and the probe 6
1 is connected to an external resistance measuring device 5 by a lead wire 51 connected thereto.
2 can be taken out.

During the cutting process, the rear constraint surface 7, like the back constraint surface 8, is less likely to be affected when a defect or the like occurs in the throw-away tip 2. In this embodiment,
Since the probe insertion hole 62 is formed in the rear restraint surface 7 and the rear restraint surface 8 of the tip mounting portion 4, even if the throw-away tip 2 is damaged, the probe 61 in the probe insertion hole 62 may be broken. Few. FIG. 8 shows the indexable insert 2 mounted on the holder 1 shown in FIGS. 1 and 2 and the holder 1A shown in FIG.

The indexable insert 2 is of a negative type in which cutting edges on both upper and lower sides can be used. The upper and lower sides are not distinguished from each other, but for convenience, one is an upper surface 23 and the other is a lower surface 24. This indexable tip 2
As shown in the figure, eight corners and eight nose portions 28 can be used for cutting. Eight nose sections 28
8A will be described as an example. On the side surfaces connected to the nose portions 28a, the conductive film wear sensors 21 extending along the cutting edge ridges 26 are provided. The wear sensor 21 extends so as to surround the nose portion 28, and its upper side is in contact with the cutting edge 26.

Each side surface of the throw-away chip 2 shown in FIG. 8 is divided into two regions where the upper surface and the lower surface are insulated from each other. Each region is provided with a pair of two sensor contact portions 22A and 22B. When the nose part 28a is used, a pair of sensor contact parts 22A, 22A,
22B is used. The wear sensor 21 has a connection line 2 extending on the side surface so as to surround the nose portion 28 (upper side shown in FIG. 8A) adjacent to the nose portion 28 to be used.
9 is electrically connected to one sensor contact portion 22A. Further, the wear sensor 21 is connected to the other sensor contact portion 22 </ b> B via a connection region 30 provided on the upper surface 23.
Is electrically connected to

In the throw-away chip 2, each one of the four pairs of sensor contact portions 22B is electrically connected in common, so that one sensor contact portion 22A
Are electrically connected to all the sensor contact portions 22B on the upper surface side. Therefore, the sensor contact portion 22B on the right side surface in FIG. 8B can be selected as the sensor contact portion corresponding to the sensor contact portion 22A on the side surface. That is, the indexable insert 2 can be mounted on the holder 1 shown in FIGS. 1 and 2 and the holder 1A shown in FIG.

Insert the throw-away tip 2 into the holder 1, 1A
And the sensor contact portions 22A, 22 of the wear sensor 21 formed on the nose portion 28a in use shown in FIG.
B is pressed against the tips 41a, 61a of the probes 41, 61. As a result, the wear sensor 21 detects the probe 41,
Connect to ohmmeter via 61. When the indexable insert 2 is worn during the cutting process and the wear finally advances to the width of the wear sensor 21 at the portion along the cutting edge ridge 26 during use of the wear sensor 21, the wear sensor 21 is disconnected. , The electrical resistance becomes infinite. The width of the portion of the wear sensor 21 along the cutting edge 26 substantially matches the use limit wear width. Therefore, at the moment when the wear progresses to the use limit wear width or the loss occurs, the wear sensor 21 The electric resistance becomes infinite. At this point, by connecting and setting a resistance meter and a machine tool (not shown) so that cutting can be stopped, the cutting edge 26
Can be prevented from being used or used without any loss.

As described above, the contact portions between the sensor contact portions 22A and 22B and the pair of probes 41 and 61 are not exposed to the outside, and the lead wires are not exposed to the outside. Sex is not inhibited. The reason why the sensor contact portions 22A and 22B of the wear sensor 21 are pressed against the probes 41 and 61 is as follows. That is, if the contact between the wear sensor 21 and the probes 41 and 61 is weak, the two may be instantaneously separated from each other due to the influence of vibration during cutting, thereby preventing erroneous detection.

In the above-described embodiment, an example in which the L-shaped lever 10 is used has been described. However, instead of the L-shaped lever 10, the throw-away tip 2 may be replaced with a clamper or a clamp bolt.
May be fixed to the holder. The present invention is not limited to the embodiment described above, and various modifications can be made within the scope of the claims.

[Brief description of the drawings]

FIG. 1 is a view showing a holder for a throw-away tip according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the holder shown in FIG.

FIG. 3 is a view for explaining a probe fixture and a probe fitted to the probe fixture.

FIG. 4 is a view of FIG. 2 viewed from the direction of arrow A.

FIG. 5 is an exploded perspective view of a holder for a throw-away tip according to another embodiment of the present invention.

FIG. 6 is a view for explaining a probe fixture according to another embodiment and a probe fitted to the probe fixture.

FIG. 7 is a view of FIG. 5 as viewed from the direction of arrow B.

FIG. 8A is a perspective view of the throw-away tip held by the holder according to the embodiment of the present invention, as viewed from the upper front, and FIG. 8B is a perspective view of the throw-away tip, viewed from the lower front.

[Description of Signs] 1 holder 2 throw-away tip 3 shank 4 tip mounting part 5 pocket 6 bottom surface (seating surface) 7 rear restraint surface (restriction surface) 8 back restraint surface (restriction surface) 19 probe insertion holes 41, 61 probe 44 , 63 Probe fixture 202 Cutting blade 203 Rake face 204 Front flank

Claims (4)

[Claims] 1. A holder having a shank attached to a tool post and a tip mounting portion provided at a tip of the shank, wherein the tip mounting portion is formed with a pocket for fixedly holding a throwaway tip with a sensor. The pocket has an upper surface, a front surface connected to the front flank of the throw-away chip, and one side surface connected to the lateral flank of the throw-away chip, with respect to the chip mounting portion. The seating surface to be placed, the rear surface, and the other side surface are constraining surfaces with which the side surfaces of the throw-away tip are abutted, respectively. And a pair of probes each having a tip electrically connected to a sensor of a throw-away tip with a sensor in the probe insertion hole. A holder for a throwaway tip with a sensor, wherein the holder is provided with a probe. 2. The holder according to claim 1, wherein a lead wire wired in a groove formed in the holder is connected to a rear end of the probe. 3. The indexable tip holder with a sensor according to claim 1, wherein the pair of probes are arranged side by side on one of two restraining surfaces. 4. The sensor-equipped throwaway according to claim 1, wherein a probe fixing tool made of an insulating material is provided for fixing the pair of probes. Tip holder.