阅读说明：本技术 刀柄及切削刀具 (Knife handle and cutting tool ) 是由 张展龙 于 2020-03-27 设计创作，主要内容包括：本发明提供了一种刀柄及具有该刀柄的切削刀具。所述刀柄包括本体、液体、刀片夹和调节螺丝；本体从后端朝着前端沿中心轴延伸,且具有设于其前端外周的凹槽和设于所述凹槽后方的型腔；液体填充所述型腔；刀片夹可安装刀片；所述刀片夹安装在所述凹槽中,与所述液体相接触,并可在所述液体的液压力作用下沿所述中心轴的方向前后移动；所述刀片夹与所述液体的接触面具有第一面积；调节螺丝一端与所述液体相接触；所述调节螺丝与所述液体的接触面具有第二面积。本发明可以方便地前后调整刀片夹的位置,以实现刀片前后位置的调整。(The invention provides a cutter handle and a cutting tool with the same. The knife handle comprises a body, liquid, a blade clamp and an adjusting screw; the body extends from the rear end to the front end along a central shaft and is provided with a groove arranged on the periphery of the front end of the body and a cavity arranged behind the groove; filling the cavity with a liquid; the blade clamp can be provided with a blade; the blade clamp is arranged in the groove, is in contact with the liquid and can move back and forth along the direction of the central shaft under the action of the hydraulic pressure of the liquid; the contact surface of the blade clamp and the liquid has a first area; one end of the adjusting screw is in contact with the liquid; the contact surface of the adjusting screw and the liquid has a second area. The invention can conveniently adjust the position of the blade clamp back and forth to realize the adjustment of the back and forth position of the blade.)

1. A tool shank, comprising:

a body extending from a rear end toward a front end along a central axis and having a groove provided on an outer periphery of the front end and a cavity provided behind the groove;

a liquid filling the cavity;

a blade holder to which a blade is mountable; the blade clamp is arranged in the groove, is in contact with the liquid and can move back and forth along the direction of the central shaft under the action of the hydraulic pressure of the liquid; the contact surface of the blade clamp and the liquid has a first area; and

an adjusting screw having one end contacting the liquid; the contact surface of the adjusting screw and the liquid has a second area.

2. A tool shank according to claim 1, in which the second area is smaller than the first area.

3. The tool shank according to claim 1, wherein an adjustment cavity is provided in the blade holder, the adjustment cavity communicating with the cavity to receive the liquid; the adjusting screw is installed on the blade clamp and extends into the adjusting cavity to be in contact with the liquid.

4. A tool shank according to claim 3, in which the cross-sectional area of the adjustment cavity is the second area.

5. A tool shank according to claim 3, wherein the adjustment screw is mounted in the blade holder from a front end of the blade holder.

6. A tool shank according to claim 1, in which the adjusting screw is mounted to the body from the periphery of the body and extends into the cavity to contact the liquid.

7. The tool shank according to claim 1, wherein a sealing ring is sleeved on the outer peripheries of the adjusting screw and the blade clamp.

8. The tool shank according to claim 1, wherein the adjusting screw is plural, and comprises at least one coarse adjusting screw with a first pitch and at least one fine adjusting screw with a second pitch, the contact surface of the coarse adjusting screw and the liquid has a second coarse adjusting area, and the contact surface of the fine adjusting screw and the liquid has a second fine adjusting area; the product of the first thread pitch and the second coarse adjustment area is larger than the product of the second thread pitch and the second fine adjustment area.

9. The tool shank according to claim 1, wherein the body is provided with a plurality of grooves and a corresponding plurality of cavities along an outer periphery thereof; the blade clamps are multiple and are arranged in the grooves one by one.

10. A tool shank according to claim 9, in which a plurality of the cavities are isolated from one another; the adjusting screw is arranged corresponding to each cavity.

11. The tool shank according to claim 9, wherein the plurality of cavities includes at least one first cavity and at least one second cavity, the first cavity and the second cavity being integrally connected.

12. The tool shank according to claim 1, wherein the recess is formed with an opening at an outer peripheral surface of the body; the opening width is less than the width of the interior of the groove.

13. A cutting tool comprising a blade and a handle according to any of claims 1-12, the blade being detachably mounted to the blade holder.

14. A cutting tool comprising a blade and a shank according to any of claims 1-12, the blade being of unitary construction with the blade holder.

Technical Field

The invention relates to the technical field of cutters, in particular to a cutter handle and a cutting cutter.

Background

In a cutting tool, the positional accuracy of an insert relative to a holder is an important parameter reflecting the accuracy of the tool, and in the case where the machine tool cannot eliminate the error of the tool by the tool setting operation, the above-mentioned parameter affects the dimension of the workpiece to be machined, the surface quality of the machined surface, and the like. Since the blade and the holder have manufacturing errors, in order to eliminate the manufacturing errors and fix the blade to a set position of the holder with high accuracy, a blade position adjusting device is generally provided in the holder to adjust the position of the blade and thereby improve the shape accuracy of the tool.

Chinese patent application CN108284244A, describes a mechanism for adjusting the cutting insert of a cutting tool. The novel knife handle comprises a knife handle body, a blade clamp for installing a blade, wherein a wedge block for adjustment is arranged at the rear end of the blade clamp, the wedge block for adjustment is fixed on the knife handle through a screw, the screw is screwed up to drive the wedge block to move inwards, the inclined surface of the wedge block compresses the blade clamp to push the blade clamp to move upwards, and then the purpose of adjusting the blade is achieved. In the scheme, the wedge block is used for adjustment, and the adjustment with higher precision can be realized by changing the inclined angle of the wedge block. However, the blade can be adjusted only in one direction, if the blade needs to be adjusted back, the blade needs to be disassembled, reinstalled and adjusted, and the operation is inconvenient and the adjustment efficiency is low. In addition, the adjusting scheme has the problems of more parts, high cost, complex operation, insufficient convenience and the like.

Disclosure of Invention

It is an object of the present invention to provide a tool holder that facilitates fore and aft adjustment of the position of the blade.

Another object of the present invention is to provide a cutting tool having the above shank.

In order to solve the technical problems, the invention adopts the following technical scheme:

according to one aspect of the invention, the invention provides a tool shank comprising a body, a liquid, a blade clamp and an adjusting screw; the body extends from the rear end to the front end along a central shaft and is provided with a groove arranged on the periphery of the front end of the body and a cavity arranged behind the groove; filling the cavity with a liquid; the blade clamp can be provided with a blade; the blade clamp is arranged in the groove, is in contact with the liquid and can move back and forth along the direction of the central shaft under the action of the hydraulic pressure of the liquid; the contact surface of the blade clamp and the liquid has a first area; one end of the adjusting screw is in contact with the liquid; the contact surface of the adjusting screw and the liquid has a second area.

According to another aspect of the invention there is also provided a cutting tool comprising a blade and a handle as described above, the blade being removably mounted to the blade holder.

According to yet another aspect of the invention, there is also provided a cutting tool comprising a blade and a shank as described above, the blade being of unitary construction with the blade holder.

According to the technical scheme, the invention has at least the following advantages and positive effects: in the cutter handle, the front and back movement of the blade clamp relative to the body can be realized by operating the adjusting screw and utilizing the transmission of the acting force of the liquid, so that the front and back positions of the blade are adjusted. The front and back movement of the blade clamp can be quickly responded, and the adjustment is convenient. According to the characteristic that the pressure of the liquid is equal in each direction, the adjusting screw can be in contact with the liquid to achieve an adjusting effect, so that the adjusting screw has high position freedom degree, can be arranged in a direction convenient to operate, and improves the convenience of operation.

Drawings

Fig. 1 is a perspective view of a first embodiment of the cutting tool of the present invention.

Fig. 2 is a schematic view of a mating structure of a blade holder and the body in fig. 1.

Fig. 3 is a sectional view of the blade holder shown in fig. 2.

Fig. 4 is a perspective view of the blade holder of fig. 1.

Fig. 5 is a front view of fig. 4 with a seal ring fitted over the insert holder.

Fig. 6 is a schematic diagram of the blade position adjustment of fig. 1.

Fig. 7 is a perspective view of a second embodiment of the cutting tool of the present invention.

FIG. 8 is a schematic view of a mating structure of a blade holder and the body of FIG. 7.

Fig. 9 is a schematic diagram of the blade position adjustment of fig. 7.

Fig. 10 is a perspective view of a third embodiment of the cutting tool of the present invention.

Fig. 11 is a perspective view, partially in section, of a fourth embodiment of the cutting tool of the present invention.

Fig. 12 is a partially enlarged schematic view of a portion a of fig. 11.

The reference numerals are explained below: 10/10a/10b/10c, cutting tools; 20. an adjustment tool;

1/1a/1b/1c, a knife handle;

11/11a/11b/11c, body; 111. a groove; 112/112a/112c, a cavity; 113. locking holes; 114a, an adjusting hole; 115c, a channel;

12/12a/12c, liquid;

13/13a/13b/13c, blade holder; 131. a blade mounting portion; 132. a blade mounting groove; 133. a blade fastening hole; 134. an adjustment chamber; 135. an adjustment hole; 136. grooving; 137. locking surfaces;

14/14a/14b/14c, adjusting screws; 145. an operation hole; 141b, coarse adjustment adjusting screw; 142b, fine adjustment adjusting screws;

15/15a/15c, locking screws;

16. a first seal ring;

17. a second seal ring;

2/2a/2c, blade;

3. the blade fastens the screw.

Detailed Description

Exemplary embodiments that embody features and advantages of the invention are described in detail below in the specification. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive.

The invention provides a tool shank and a cutting tool with the same. When the cutting tool is used, the tool shank is mounted on a machine tool, and a workpiece is machined by using a blade on the tool shank.

For convenience of expression, the end of the cutting tool which is closer to the machine tool when in use is defined as the "rear end", and correspondingly the end which is further from the machine tool is defined as the "front end".

Fig. 1 to 6 illustrate the structure of a first embodiment of a cutting tool 10 of the present invention.

Referring to fig. 1, the cutting tool 10 of the present embodiment is a face milling cutter head structure, which includes a cutter shank 1 and a plurality of blades 2 mounted on the cutter shank 1. The plurality of blades 2 are uniformly distributed on the periphery of the front end of the tool holder 1.

Preferably, the blade 2 is fixedly mounted on the handle 1 by means of a blade fastening screw 3. Thus, the blade 2 of the present embodiment may be replaced, for example, after the blade 2 is worn or has reached its useful life, the blade 2 may be removed and replaced with a new blade 2. The form of the blade 2 can be adaptively designed according to actual requirements, and is not limited herein.

Referring to fig. 1 and 2, the tool holder 1 mainly includes a body 11, a liquid 12, a blade holder 13, an adjusting screw 14, a locking screw 15, a first sealing ring 16, and a second sealing ring 17. The main body 11 is a main structural component of the tool holder 1, and is configured to be mounted on a machine tool and to receive and fix the liquid 12, the insert holder 13, the adjusting screw 14, the locking screw 15, the first seal ring 16, and the second seal ring 17.

The body 11 is generally a rotating part that extends along the central axis L from the rear end towards the front end. The central axis L extends in the front-rear direction, and is also a rotational central axis of the cutting tool 10 during machining.

The body 11 has a plurality of grooves 111 formed on the outer periphery of the front end thereof, a plurality of cavities 112 formed on the rear side of the grooves 111, and a plurality of locking holes 113 formed on the outer periphery thereof. In the present embodiment, the cavities 112 are isolated from each other and are not communicated with each other.

The recess 111 extends in the front-rear direction for mounting the blade holder 13. The cavities 112 are used for filling the liquid 12, and in this embodiment, the cavities 112 correspond to and communicate with the grooves 111 one by one. The cavity 112 is generally cylindrical with its axis parallel to the central axis L. The locking holes 113 are also communicated with the grooves 111 one by one for the penetration of the locking screws 15.

The front end of the groove 111 penetrates the front end surface of the body 11, the side surface of the groove 111 penetrates the outer peripheral surface of the body 11, and an opening (not numbered in the figure) is formed on the outer peripheral surface of the body 11. In the present embodiment, the groove 111 has a structure with a larger inner space and a smaller opening in the radial direction of the body 11. As shown in fig. 1, the cross section of the inside of the groove 111 is substantially circular, the width of the inside of the groove 111, i.e. the diameter of the circle, is D1, and the width of the opening is D2, wherein D1> D2. The opening is small in size, and can form a stop function on the blade clamp 13 in the radial direction, so that the blade clamp 13 is prevented from radially flying out, and the safety is improved.

The liquid 12 fills the cavity 112 of the body 11. The liquid 12 may be a fluid such as water, hydraulic oil, or the like.

Referring to fig. 2 to 5, the blade holder 13 is configured to mount the blade 2, and has a main body portion having a substantially cylindrical shape, and a front end portion protruding circumferentially beyond a blade mounting portion 131 for mounting the blade 2. Specifically, as shown in fig. 4, the insert mounting portion 131 is provided with an insert mounting groove 132 for receiving the insert 2 and an insert fastening hole 133 into which the insert fastening screw 3 is fastened.

The main body portion of the blade holder 13 is fittingly mounted in the recess 111 of the body 11. The rear end of the blade holder 13 extends into the cavity 112, contacts the liquid 12, and is movable back and forth by the hydraulic pressure of the liquid 12 in a direction parallel to the central axis L. The contact surface of the blade holder 13 with the liquid 12 has a first area S1. In this embodiment, the first area S1 is an end surface area of the insert holder 13 and is also a cross-sectional area of the cavity 112.

In this embodiment, the blade holder 13 further has a regulating cavity 134, and the regulating cavity 134 penetrates through the rear end surface of the blade holder 13, so as to communicate with the cavity 112 and receive the liquid 12. An adjusting hole 135 is arranged in the blade clamp 13 in front of the adjusting cavity 134; the adjustment hole 135 communicates with the adjustment chamber 134 and penetrates the front end surface of the blade holder 13.

The rear end of the blade holder 13 is circumferentially provided with a groove 136 for sealing engagement with the cavity 112 via the seal ring 16. The blade holder 13 is further formed with a planar locking surface 137 on the outer periphery thereof, and the locking surface 137 faces the locking hole 113 of the body 11 for cooperating with the locking screw 15 to lock the position of the blade holder 13.

Referring to fig. 2 and 3, the adjusting screw 14 is mounted in the blade holder 13, the head of the adjusting screw 14 is received in the adjusting hole 135, and the shaft of the adjusting screw 14 extends from the adjusting hole 135 into the adjusting cavity 134 to contact the liquid 12. The adjusting screw 14 may be in threaded engagement with the adjusting hole 135 or with the adjusting cavity 134. The moving direction of the liquid 12 can be adjusted by screwing in or out the adjusting screw 14, so that the blade clamp 13 is driven to move back and forth.

In this embodiment, the adjusting screw 14 is installed in the insert holder 13 from the front end of the insert holder 13, and the head of the adjusting screw 14 is provided with an operation hole 145 exposed to the front end face of the insert holder 13, so that an operator can adjust the adjusting screw from the front end of the cutting tool 10 conveniently, and the operation is facilitated. The access hole 145 may be a hex socket or other configuration to facilitate tool access.

Wherein the pitch of the adjusting screw 14 is d, and the contact surface of the adjusting screw 14 and the liquid 12 has a second area S2. In this embodiment, the second area S2 is the cross-sectional area of the adjustment cavity 134 and the area of the rear end surface of the adjustment screw 14. In the preferred embodiment, the second area S2< the first area S1.

Referring to fig. 1 and 2, the locking screw 15 is screwed into the locking hole 113 of the body 11 and faces the locking surface 137 of the blade holder 13. When the cutting tool 10 is machined, the inner end of the locking screw 15 abuts against the locking surface 137 of the insert holder 13, and the insert holder 13 is fixed to the main body 11. When the front and rear positions of the blade holder 13 need to be adjusted, the locking screw 15 can be loosened so that it no longer abuts against the blade holder 13.

It should be noted that, as known to those skilled in the art, when the cutting tool 10 is used for machining, the position of the blade 2 and the holder 1 must be fixed, and particularly in the present embodiment, the blade holder 13 and the body 11 need to be fixed, and the specific fixing manner can be implemented in various manners in the related art. In this embodiment, after the front and rear positions of the blade holder 13 are adjusted, the fixing method is not limited to fixing the blade holder 13 and the main body 11.

Referring to fig. 2 to 5, the first sealing ring 16 is sleeved on the periphery of the blade clamp 13, and the second sealing ring 17 is sleeved on the periphery of the adjusting screw 14, so as to respectively play a role of moving and sealing. The first seal ring 16 and the second seal ring 17 can be made of rubber elastic material.

For the first sealing ring 16 fitted on the insert holder 13, the first sealing ring 16 is fitted in the groove 136 of the insert holder 13 and is elastically deformed by being pressed by the inner peripheral wall of the cavity 112, so as to be in close contact with the outer peripheral surface of the insert holder 13 and the inner peripheral wall of the cavity 112, and to maintain the seal between the insert holder 13 and the cavity 112.

Similarly, the second sealing ring 17 sleeved on the adjusting screw 14 is tightly contacted with the outer circumferential surface of the adjusting screw 14 and the inner circumferential wall of the adjusting cavity 134, so as to maintain the sealing between the adjusting screw 14 and the adjusting cavity 134.

Based on the above description, referring to fig. 6, in the tool holder 1 of the present embodiment, the forward and backward position adjustment process of the blade holder 13 is roughly as follows.

The knife handle 1 is placed on a platform, and the front end of the knife handle 1 faces upwards. The locking screw 15 corresponding to the blade holder 13 to be adjusted is loosened.

At this time, the operation hole 145 of the adjusting screw 14 faces upward, and the adjusting screw 14 is rotated by inserting the proper adjusting tool 20 into the operation hole 145, so that the adjusting screw 14 moves upward or downward relative to the body 11. In the present embodiment, the adjustment tool 20 may be a hexagonal wrench corresponding to the hexagonal socket of the operation hole 145.

When the adjustment screw 14 is moved downward, the adjustment screw 14 applies a downward force to the liquid 12, causing the liquid 12 in the adjustment chamber 134 to move downward into the molding cavity 112. Since the volume change of the liquid 12 is very limited, the volume change of the liquid 12 is negligible compared to the position adjustment of the blade holder 13, and the volume of the liquid 12 can be considered to be constant. When the liquid 12 in the regulating cavity 134 enters the cavity 112, the cavity 112 needs to be expanded to accommodate the newly entered liquid 12, so that the liquid 12 pushes the blade holder 13 to move upward, and the position adjustment of the forward movement of the blade holder 13 relative to the body 11 is realized.

When the adjusting screw 14 moves upward, the volume in the adjusting cavity 134 increases, the liquid 12 in the cavity 112 enters the adjusting cavity 134, the liquid 12 in the cavity 112 generates a suction effect on the blade holder 13 to drive the blade holder 13 to move downward, so that the cavity 112 is contracted to maintain the total volume of the liquid 12 unchanged, and at this time, the position adjustment of the blade holder 13 moving backward relative to the body 11 is realized.

After the position of the blade holder 13 is adjusted to a predetermined position, the corresponding locking screw 15 is tightened again to fix the blade holder 13 to the main body 11.

According to the above adjustment process, in the present embodiment, the front and back position adjustment of the blade holder 13 is realized by screwing in or screwing out the adjusting screw 14, the liquid 12 is pushed forward or sucked backward by the acting force of the adjusting screw 14 on the liquid 12 according to the characteristic that the liquid volume is not changed, and the blade holder 13 moves forward and backward to complete the position adjustment. The front and back movement of the blade clamp 13 can be quickly responded, and the adjustment is convenient and quick.

Assuming that the adjustment screw 14 rotates 1 revolution, the blade holder 13 moves a distance Δ h.

When the adjusting screw 14 rotates 1 cycle, the linear moving distance is the pitch d, the contact surface area with the liquid 12 is the second area S2, and the volume change amount caused by 1 cycle of rotation is d × S2. When the contact surface area of the blade holder 13 and the liquid 12 is the first area S1, the volume change amount due to the movement Δ h is Δ h × S1.

Since the liquid volume is constant, the volume change caused by 1 rotation of the adjusting screw 14 must be equal to the volume change caused by the movement of the blade holder 13. Therefore, the following equation holds: d × S2 ═ Δ h × S1.

Thus, Δ h ═ d × S2 ÷ S1. From this, the positional adjustment accuracy of the blade holder 13 is positively correlated with the pitch d of S2/S1.

In the present embodiment, the following conditions are further satisfied: s2< S1, so that the movement Δ h of the blade holder 13 by 1 rotation of the adjusting screw 14 is smaller than the pitch d, and thus, adjustment at a smaller distance can be achieved, and higher adjustment accuracy can be obtained. In practical applications, the ratio of S2 to S1 can be reasonably designed to obtain the required adjustment accuracy. The pitch d of the adjusting screw 14 can be selected to be a larger value, which increases the strength of the adjusting screw 14 and reduces the difficulty of machining the adjusting screw 14.

Fig. 7 to 9 illustrate the structure of a second embodiment of the cutting tool 10a of the present invention.

Referring to fig. 7 and 8, the cutting tool 10a of this second embodiment is substantially identical in construction to the cutting tool 10 of the first embodiment, except for the following: in the second embodiment, the positions of the adjustment screws 14a on the tool holder 1a are different.

Specifically, in the second embodiment, the adjusting screw 14a is mounted on the body 11a of the tool shank 1 a. The outer peripheral surface of the body 11a is provided with an adjustment hole 114 a. An adjusting screw 14a is mounted on the body 11a from the periphery of the body 11a and is in threaded engagement with the adjusting hole 114a, and the inner end of the adjusting screw 14a extends into the cavity 112a and contacts the liquid 12 a. Accordingly, the adjustment cavity 134 and the adjustment hole 135 need not be provided in the blade holder 13 a.

Other structures in the second embodiment can refer to the description of the first embodiment, and the description is not repeated here.

Referring to fig. 9, in the cutting tool 10a according to the second embodiment, when the position of the insert holder 13a is adjusted, the tool shank 1a is mounted on the tool adjustment device, and the front end of the tool shank 1a faces upward. At this time, the operator may loosen the locking screw 15a corresponding to the blade holder 13a to be adjusted, and rotationally adjust the adjustment screw 14a from the outer periphery of the body 11a by the adjustment tool 20, thereby moving the blade holder 13a up and down. The adjustment principle is the same as that of the first embodiment and will not be described in detail here.

Fig. 10 illustrates the structure of a third embodiment of the cutting tool 10b of the present invention.

The third embodiment is different from the first and second embodiments described above in that: the adjusting screw 14b is provided with two coarse adjusting screws 141b having a first pitch d1 and two fine adjusting screws 142b having a second pitch d2, corresponding to the same blade holder 13 b.

In the third embodiment, the attachment manner of the coarse adjustment screw 141b is referred to the attachment manner of the adjustment screw 14 in the first embodiment, and the attachment manner of the fine adjustment screw 142b is referred to the attachment manner of the adjustment screw 14a in the second embodiment. The structure of the blade holder 13b and the structure of the body 11b are referred to the structures of the first and second embodiments described above, respectively

The contact surface of the coarse adjustment screw 141b and the liquid (not shown in fig. 10) has a second coarse adjustment area S21, and the contact surface of the fine adjustment screw 142b and the liquid has a second fine adjustment area S22; the product of the first pitch d1 and the second coarse adjustment area S21 is greater than the product of the second pitch d2 and the second fine adjustment area S22.

Based on the above-described principle, the volume change amount caused by the rotational movement of the coarse adjustment screw 141b and the fine adjustment screw 142b is correspondingly the same as the volume change amount caused by the forward and backward movement of the blade holder 13 b. When the coarse adjustment screw 141b rotates 1 cycle, the distance that the blade clamp 13b moves back and forth is Δ h1, and Δ h1 is d1 × S21 ÷ S1; when the fine adjustment screw 142b rotates 1 cycle, the distance that the blade holder 13b moves forward and backward is Δ h2, and Δ h2 is d2 × S22 ÷ S1. Since d1 × S21 > d2 × S22, Δ h 1> Δ h 2.

Therefore, when the distance of the blade clamp 13b to be adjusted is large, the adjustment can be performed through the rough adjustment screw 141b, so as to perform quick adjustment; when the distance of the blade clamp 13b to be adjusted is small, the adjustment can be performed through the fine adjustment screw 142b, and high accuracy is achieved. Different adjusting screws 14b can be adapted to different adjusting occasions, and the operation is more convenient and flexible.

The pitch of the coarse adjustment screw 141b and the fine adjustment screw 142b, and the contact surface with the liquid, respectively, can be designed according to actual conditions, so that the product of the pitch of the coarse adjustment screw and the fine adjustment screw and the second area has a difference, and differential adjustment of the blade holder 13b can be realized.

The attachment positions of the coarse adjustment screw 141b and the fine adjustment screw 142b are not limited to the embodiment shown in fig. 10. For example, the positions of the two can be reversed, or both can be mounted on the body 11b or both can be mounted on the blade holder 13b, as the structure allows, just by contacting them with the liquid.

Fig. 11 and 12 illustrate the structure of a fourth embodiment of the cutting tool 10c of the present invention.

The main differences between this fourth embodiment and the second embodiment are: in the fourth embodiment, all the cavities 112c in the body 11c are integrally communicated.

Referring to fig. 12, the body 11c has a channel 115c between two adjacent cavities 112c to connect the two cavities 112c into a whole. On the body 11c, all the cavities 112c are connected by such a passage 115c to form an annular cavity, and the liquid 12c fills the entire cavity.

The blade holders 13c extend into a cavity 112c, respectively, and are in contact with the liquid 12c, and are fixed to the body 11c by a locking screw 15 c.

Only one set screw 14c is provided, extending into one of the cavities 112c to contact the liquid 12 c.

When the front and rear positions of the blade holder 13c need to be adjusted, all the blade holders 13c may be adjusted in batch, or a specific blade holder 13c may be adjusted individually.

The general process of batch adjustment is as follows.

The locking screws 15c of all the insert holders 13c are loosened and the cutting tool 10c is placed on a horizontal platform with the front end of the shank 1c facing downwards. The blade 2c attached to the blade holder 13c having a large projection amount first contacts the horizontal table, and the blade holder 13c having a large projection amount moves backward by the action of gravity, and the blade holder 13c compresses the liquid 12c in the cavity 112c at the rear end thereof and flows into the other cavities 112 c. For the blade 2c mounted on the blade holder 13c with a small projection amount, since the blade holder 13c is not in contact with the horizontal table, the blade holder 13c is not subjected to a force, and the rear end cavity 112c thereof receives the liquid 12c pressed from the other cavities 112c and moves forward. Finally, the aim of contacting the blades 2c on all the blade clamps 13c with the horizontal table is achieved, and the aim of adjusting the protruding amount of all the blades 2c is achieved. After adjustment, if the front-back position of the blade 2c needs to be further adjusted, the adjusting screw 14c can be rotated to drive the blade holder 13c to move back and forth through the volume change caused by the movement of the adjusting screw 14 c.

The general procedure for individual adjustment is as follows.

The locking screw 15c corresponding to the blade clamp 13c to be adjusted is loosened, the adjusting screw 14c is rotated, and the liquid 12c drives the blade clamp 13c to move back and forth as the cavities 112c are communicated.

Based on the structure of the fourth embodiment, the adjusting screw 14c may also be provided in multiple numbers, and may be provided at different positions, so as to facilitate adjustment from different positions. The multiple adjusting screws 14c can respectively realize the functions of coarse adjustment and fine adjustment, and different adjusting screws 14c are adopted for adjustment when the distances required to be adjusted are different. The adjustment screw 14c may also be configured to extend into the channel 115c to contact the liquid 12 c.

Further, in some other possible embodiments, it is not limited that all the cavities 112c are connected to one another, and only two or more of the cavities 112c are connected to one another, and the position of the corresponding two or more blade holders 13c is adjusted by the adjusting screws 14 c.

In the cutting tools of the above embodiments, the insert is detachably mounted on the insert holder of the holder, and it is understood that in other embodiments not shown, the insert may be integrated with the insert holder of the holder, and will not be described in detail herein.

As is apparent from the above description of the embodiments, the cutting tool and the holder according to the present invention can adjust the front-rear position of the blade by operating the adjusting screw and by transmitting the force of the liquid to move the blade holder forward and backward relative to the body. The front and back movement of the blade clamp can be quickly responded, and the adjustment is convenient. According to the characteristic that the pressure of the liquid is equal in each direction, the adjusting screw can be in contact with the liquid to achieve an adjusting effect, so that the adjusting screw has high position freedom degree, can be arranged in a direction convenient to operate, and improves the convenience of operation.

Furthermore, by setting the contact area of the adjusting screw and the blade clamp with the liquid, high adjusting precision can be obtained.

While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.