Tool loading and grabbing device for end mill

Abstract

The present invention discloses a tool-loading and grabbing device for an end mill, wherein the inner wall of a clamping sleeve and the outer wall of the end mill are interference-fitted, a plurality of strip grooves A are provided along the axial direction of the clamping sleeve at the end of the clamping sleeve facing away from the pipe opening of a hand-held sleeve, and the strip grooves A penetrate the inside and outside of the sleeve body, and the strip grooves A separate the clamping sleeve and the tapered tube into a plurality of clamping petals, and a plurality of strip grooves B are provided along the axial direction of the hand-held sleeve at the end of the pipe opening facing away from the clamping sleeve, and the strip grooves B penetrate the inside and outside of the hand-held sleeve. It can be seen from the above structure that the tool-loading and grabbing device for an end mill of the present invention facilitates the removal of the end mill to be replaced from the tool handle and the installation of the end mill to be replaced when the end mill is being installed and changed, thereby improving the efficiency of tool installation and changing, preventing the end mill from being damaged during the process of tool installation and changing, and preventing the operator from being scalded during the process of tool installation and changing of the end mill.

Description

Technical Field

[0001] The invention relates to the technical field of tool installation and tool change for an end mill, and in particular to a tool installation and gripping device for an end mill. Background Art

[0002] End mills are the most commonly used milling cutters on CNC machine tools. End mills have cutting blades on the cylindrical surface and end face, which can be used for cutting at the same time or separately. They are mainly used for plane milling, groove milling, step milling and profile milling.

[0003] The end mill is fixed to the shank by a sleeve that is fixed to the shank through threads, which results in a bulge between the shank and the end mill. However, when clamping some end mills with smaller diameters, there is no margin for processing threads because the diameter at the corresponding position of the shank is relatively small. Some end mills with smaller diameters are fixed to the shank directly through the shaft hole size that is too hard to match. However, since the size fit is an interference fit, when installing or changing the tool, the position where the shank is connected to the end mill must be heated to increase the inner diameter of the shaft hole, so as to facilitate the installation or replacement of the end mill. However, in this case, since the end mill is also made of metal and has good thermal conductivity, the temperature of the end mill will also increase after the shank is heated, which can easily cause burns to the operator when directly operating. In addition, since the blade of the end mill needs to keep a certain axial distance from the shank after the tool is installed, the end mill must extend a certain axial length of the shank. Even when processing different workpieces, the axial length of the end mill extending out of the shank will be different due to the differences in the workpieces being processed; the axial lengths of different end mills extending out of the shank are even more different. How to facilitate the installation and replacement of the end mill while ensuring that the axial length of the end mill extending out of the shank meets the requirements is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a tool-loading and grabbing device for an end mill, which is convenient for removing the end mill to be replaced from the tool handle and for loading the end mill to be replaced when loading and changing the end mill, thereby improving the efficiency of tool loading and changing, avoiding damage to the end mill during the process of loading and changing the end mill, and preventing the operator from being burned during the process of loading and changing the end mill; the inner diameter of the clamping sleeve and the outer diameter of the end mill are interference fit, and the strip groove A provided on the clamping sleeve makes the formed clamping petal have a certain radial direction along the corresponding radial direction of the clamping sleeve The material clamping sleeve has a certain elasticity, so that the end mill can be clamped by the elastic force of the clamping flap. At the same time, when the end mill is clamped and fixed by the tool holder through the interference fit, since the material clamping flap can be elastically deformed in the radial direction, the force between the clamping sleeve and the end mill is much smaller than the force between the tool holder and the end mill, so that it is easy to move the clamping sleeve along the axial direction of the end mill until the clamping sleeve is separated from the end mill; through the action of the strip groove B, it is easy to observe and measure the axial distance between the end of the cutter head taken into the sleeve body of the end mill and the pipe opening of the clamping sleeve facing away from the hand-held sleeve, so as to ensure the installation of the tool The axial length of the finished end mill extending out of the tool holder meets the tool installation requirements; the axial length between the end mill extending into the sleeve body and the clamping sleeve can be directly observed through the set scale area; through the function of the movable plate, not only can it be more convenient to accurately observe the axial length between the end mill extending into the sleeve body and the clamping sleeve, but also the position of the movable plate can be actively adjusted according to the axial length of the tool holder required to be extended out of the end mill after the tool installation is completed, so that the movable plate can position the end mill extending into the sleeve body. When installing the end mill after positioning, it only needs to move the clamping sleeve After the tube opening at one end of the clamping sleeve facing away from the hand-held sleeve contacts the tool handle, and then when the tool handle cools and clamps the end mill, the axial length of the end mill extending out of the tool handle can be guaranteed to meet the requirements; when the clamping piece moves to the position of the tube opening at one end of the clamping sleeve facing away from the hand-held sleeve, the clamping flap can clamp the end mill, and when the clamping piece moves to the position of the end of the clamping sleeve facing the hand-held sleeve, the clamping flap can move relative to the end mill; the flange provided on the clamping sleeve can not only limit the clamping piece, but also the bend formed after the flange is folded can form a guide port for the end mill to enter the clamping sleeve.

[0005] The technical solution adopted by the invention is:

[0006] The tool loading and grabbing device of the end mill comprises a sleeve body, wherein the sleeve body comprises a hand-held sleeve and a material clamping sleeve which are coaxially connected and fixed by a tapered tube, the inner wall of the material clamping sleeve and the outer wall of the end mill are interference fit, the inner diameter of the material clamping sleeve is smaller than the inner diameter of the hand-held sleeve, a pipe opening of the material clamping sleeve facing away from the hand-held sleeve and a plurality of strip grooves A are arranged along the axial direction of the material clamping sleeve, the strip grooves A are evenly distributed with the axial center of the material clamping sleeve as the center, and the strip grooves A penetrate the material clamping sleeve and extend to the material clamping sleeve. The strip groove A passes through the inside and outside of the sleeve body, and the strip groove A separates the clamping sleeve and the tapered tube into a plurality of clamping petals. The pipe opening of the hand-held sleeve facing away from the clamping sleeve is provided with a plurality of strip grooves B along the axial direction of the hand-held sleeve. The strip grooves B are evenly distributed with the axis of the hand-held sleeve as the center, and the strip grooves B pass through the inside and outside of the hand-held sleeve.

[0007] A further improvement of the present invention is that an outer side wall of the clamping sleeve is sleeved and connected with a clamping piece for tightening a clamping flap at the position of the clamping sleeve.

[0008] A further improvement of the present invention is that the pipe opening of the clamping sleeve at one end facing away from the hand-held sleeve is provided with a flange outwardly, the flange forms a limit stop strip of the clamping piece, and the maximum radius of the clamping piece is greater than the radius of the flange.

[0009] A further improvement of the present invention is that the wall thickness of the clamping sleeve is equal to the wall thickness of the tapered tube, and both are smaller than the wall thickness of the hand-held sleeve.

[0010] A further improvement of the present invention is that a scale area is provided at a position on the outer side wall of the hand-held sleeve corresponding to the strip groove B.

[0011] A further improvement of the present invention is that a movable plate is further provided inside the hand-held sleeve and reciprocates along the axis of the hand-held sleeve, the movable plate is perpendicular to the axis of the hand-held sleeve, and convex plates A extending into the strip groove B are respectively provided at the edge of the movable plate and at the position corresponding to the strip groove B, the width of the convex plate A matches the width of the strip groove B, and the radius of the convex plate A is less than or equal to the radius of the hand-held sleeve.

[0012] A further improvement of the present invention is that the end surface of the movable plate facing away from the clamping sleeve is connected to the screw end of the adjusting bolt, and the adjusting bolt is threadedly connected to an end plate which is detachably fixed to the pipe opening of one end of the hand-held sleeve facing away from the clamping sleeve through a thread, and the end of the adjusting bolt extending into the hand-held sleeve is rotatably connected to the movable plate through a rotating connecting device with the axis of the adjusting bolt as the rotating axis, and the end of the adjusting bolt extending out of the hand-held sleeve is fixedly connected to a screwing head.

[0013] A further improvement of the present invention is that one end of the adjusting bolt extending into the hand-held sleeve is coaxially fixedly connected to a connecting rod, and the connecting rod is rotatably connected to a connecting sleeve fixed to the movable plate through a bearing, and a connecting cover A for detachably fixedly connected to the connecting sleeve is also sleeved on the connecting rod, and the connecting cover A is provided with a matching through hole A corresponding to the connecting rod.

[0014] A further improved solution of the present invention is that a spring is provided inside the hand-held sleeve and between the movable plate and the end plate, the adjusting bolt is passed through the spring, and the spring is provided with a pre-compression stress.

[0015] A further improvement of the present invention is that the outer diameter of the end plate matches the inner diameter of the hand-held sleeve, and an annular baffle is coaxially provided on the side wall of the end plate and the side edge away from the clamping sleeve, the outer diameter of the annular baffle is less than or equal to the outer diameter of the hand-held sleeve, and the end plate is provided with convex plates B extending into the strip groove B at the positions corresponding to the strip grooves B, the width of the convex plates B matches the width of the strip grooves B, and the radius of the convex plates B is less than or equal to the radius of the hand-held sleeve, and the end plate is detachably fixedly connected to the hand-held sleeve via a connecting cover B, and the connecting cover B is provided with a through hole B corresponding to the position of the adjusting bolt, and the adjusting bolt passes through the through hole B and is threadedly connected to the end plate.

[0016] The beneficial effects of the present invention are:

[0017] First, the tool loading and grabbing device of the end mill of the present invention facilitates the removal of the end mill to be replaced from the tool holder and the loading of the end mill to be replaced when the end mill is being loaded and replaced, thereby improving the efficiency of tool loading and changing, avoiding damage to the end mill during the process of loading and changing the end mill, and preventing the operator from being burned during the process of loading and changing the end mill.

[0018] Second, in the tool mounting and grasping device of the end mill of the present invention, the inner diameter of the clamping sleeve and the outer diameter of the end mill are interference fit, and the strip groove A provided on the clamping sleeve makes the formed clamping flap have a certain elasticity along the corresponding radial direction of the clamping sleeve, so that the end mill can be clamped by the elastic force of the clamping flap. At the same time, after the tool handle clamps and fixes the end mill by the interference size fit, since the clamping flap can be elastically deformed in the radial direction, the force between the clamping sleeve and the end mill is much smaller than the force between the tool handle and the end mill, thereby facilitating the axial movement of the clamping sleeve along the end mill until the clamping sleeve is separated from the end mill.

[0019] Thirdly, the tool-loading and grasping device of the end mill of the present invention facilitates the observation and measurement of the axial distance between the end of the cutter head of the end mill taken into the sleeve body and the tube opening of the clamping sleeve facing away from the hand-held sleeve through the action of the strip groove B, thereby ensuring that the axial length of the end mill extending out of the tool handle after tool loading meets the tool loading requirements.

[0020] Fourthly, the tool mounting and grabbing device for the end mill of the present invention can directly observe the axial length between the end mill inserted into the sleeve body and the material clamping sleeve through the provided scale area.

[0021] Fifth, the tool loading and grabbing device of the end mill of the present invention, through the action of the movable plate, can not only more conveniently and accurately observe the axial length between the end mill inserted into the sleeve body and the clamping sleeve, but also can actively adjust the position of the movable plate according to the axial length of the tool handle required to be extended after the end mill is installed, so that the movable plate can play a positioning role for the end mill inserted into the sleeve body. When the positioned end mill is installed, it is only necessary to make the clamping sleeve with the back of one end facing the hand-held sleeve in contact with the tool handle, and then when the tool handle is cooled and clamped to clamp the end mill, it can be ensured that the axial length of the end mill extending from the tool handle meets the requirements.

[0022] Sixth, the tool loading and grabbing device of the end mill of the present invention can ensure that the clamping flap clamps the end mill when the clamping sleeve is moved to the position where the pipe opening of one end of the clamping sleeve is facing away from the hand-held sleeve, and can facilitate the movement of the clamping flap relative to the end mill when the clamping sleeve is moved to the position where the clamping sleeve faces one end of the hand-held sleeve.

[0023] Seventh, the tool-loading and grabbing device of the end mill of the present invention can not only limit the clamping piece through the flange provided on the clamping sleeve, but also the bending part formed after the flange is folded can form a guide port for the end mill to enter the clamping sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front cross-sectional schematic diagram of the present invention.

[0025] Figure 2 It is a front view schematic diagram of the present invention. DETAILED DESCRIPTION Example

[0026] Combination Figure 1~Figure 2It can be seen that the tool holding and grabbing device of the end mill of the present invention comprises a sleeve body, wherein the sleeve body comprises a hand-held sleeve 1 and a clamping sleeve 2 which are coaxially connected and fixed by a tapered tube 3, the inner wall of the clamping sleeve 2 and the outer wall of the end mill are interference fit, the inner diameter of the clamping sleeve 2 is smaller than the inner diameter of the hand-held sleeve 1, and the pipe opening of the clamping sleeve 2 at one end facing away from the hand-held sleeve 1 and along the axial direction of the clamping sleeve 2 are provided with a plurality of strip grooves A4, the strip grooves A4 are evenly distributed with the axial center of the clamping sleeve 2 as the center, and the strip grooves A4 extend to the clamping sleeve 2 after penetrating the clamping sleeve 2. The strip groove A4 passes through the inside and outside of the sleeve body, and separates the material clamping sleeve 2 and the tapered tube 3 into a plurality of material clamping petals. The hand-held sleeve 1 is provided with a plurality of strip grooves B5 at the pipe opening at one end facing away from the material clamping sleeve 2 and along the axial direction of the hand-held sleeve 1. The strip grooves B5 are evenly distributed with the axis of the hand-held sleeve 1 as the center, and the strip grooves B5 pass through the inside and outside of the hand-held sleeve 1.

[0027] The outer side wall of the clamping sleeve 2 is sleeved with a clamping member 7 for tightening the clamping flap at the position of the clamping sleeve 2 .

[0028] The pipe opening of the clamping sleeve 2 at one end facing away from the hand-held sleeve 1 is provided with a flange 8 outwardly, and the flange 8 forms a limit stop strip of the clamping member 7 , and the maximum radius of the clamping member 7 is greater than the radius of the flange 8 .

[0029] The wall thickness of the clamping sleeve 2 is equal to that of the tapered tube 3 , and both are smaller than that of the handheld sleeve 1 .

[0030] A scale area 6 is provided on the outer side wall of the hand-held sleeve 1 at a position corresponding to the strip groove B5.

[0031] The hand-held sleeve 1 is also provided with a movable plate 9 which reciprocates along the axis of the hand-held sleeve 1. The movable plate 9 is perpendicular to the axis of the hand-held sleeve 1. The edges of the movable plate 9 and the positions corresponding to the strip grooves B5 are respectively provided with convex plates A20 which extend into the strip grooves B5. The width of the convex plates A20 matches the width of the strip grooves B5, and the radius of the convex plates A20 is less than or equal to the radius of the hand-held sleeve 1.

[0032] The end surface of one side of the movable plate 9 facing away from the clamping sleeve 2 is connected to the screw end of the adjusting bolt 10, and the adjusting bolt 10 is threadedly connected to an end plate 11 which is detachably fixed to the pipe opening of the hand-held sleeve 1 facing away from the clamping sleeve 2 through a thread. The end of the adjusting bolt 10 extending into the hand-held sleeve 1 is rotatably connected to the movable plate 9 through a rotating connecting device with the axis of the adjusting bolt 10 as the rotating axis, and the end of the adjusting bolt 10 extending out of the hand-held sleeve 1 is fixedly connected to a screwing head 21.

[0033] The end of the adjusting bolt 10 extending into the hand-held sleeve 1 is coaxially fixedly connected with a connecting rod 16, and the connecting rod 16 is rotatably connected to a connecting sleeve 15 fixed to the movable plate 9 through a bearing 17. A connecting cover A18 for detachably fixedly connected to the connecting sleeve 15 is also sleeved on the connecting rod 16, and the connecting cover A18 is provided with a matching through hole A corresponding to the connecting rod 16.

[0034] A spring 19 is provided inside the hand-held sleeve 1 and between the movable plate 9 and the end plate 11 . The adjusting bolt 10 is passed through the spring 19 . The spring 19 is provided with a pre-compression stress.

[0035] The outer diameter of the end plate 11 matches the inner diameter of the hand-held sleeve 1, and an annular baffle 14 is coaxially provided on the side wall of the end plate 11 and the side edge away from the clamping sleeve 2. The outer diameter of the annular baffle 14 is less than or equal to the outer diameter of the hand-held sleeve 1. The end plate 11 is provided with convex plates B extending into the strip groove B5 at the positions corresponding to the strip groove B5. The width of the convex plate B matches the width of the strip groove B5, and the radius of the convex plate B is less than or equal to the radius of the hand-held sleeve 1. The end plate 11 is detachably fixedly connected to the hand-held sleeve 1 through a connecting cover B12. The connecting cover B12 is provided with a through hole B13 at the position corresponding to the adjusting bolt 10. The adjusting bolt 10 passes through the through hole B13 and is threadedly connected to the end plate 11.

[0036] When the present invention is used, the movable plate 9 is moved axially along the hand-held sleeve 1 by screwing the adjusting bolt 10 until the reading value of the scale area 6 corresponding to the edge of the movable plate 9 facing the clamping sleeve 2 is equal to the axial length of the end mill extending out of the handle after the tool is installed. When installing the end mill to be replaced, move the clamping piece of a certain grasping device along the clamping sleeve 2 to one side of the tapered tube 3 to the maximum stroke, and then pass the end mill to be replaced from the cutter head end through the clamping sleeve 2, and make the cutter head of the end mill contact with the movable plate 9, and then move the clamping piece along the clamping sleeve 2 to one end of the flange 8, so that the end mill to be replaced and the grasping device are fixed for standby use; when separating the end mill to be replaced from the tool handle, move the clamping piece 7 of the other grasping device along the clamping sleeve 2 to one end of the tapered tube 3 to the maximum stroke, after heating the tool clamping position of the tool handle where the end mill to be replaced is fixed, make the tool handle and the end mill to be replaced in a clearance fit, put the clamping sleeve 2 on the outer wall of the end mill, and move the clamping sleeve 2 toward the tool handle along the axial direction of the end mill until the clamping sleeve 2 contacts the tool handle with its back to the pipe opening of the hand-held sleeve 1, and then The clamping piece 7 moves along the material clamping sleeve 2 to one end of the flange 8 until the material clamping sleeve 2 clamps and fixes the end mill, and the end mill is separated from the tool handle by operating the hand-held sleeve 1; then, the hand-held sleeve 1 on which the end mill to be replaced has been fixed is immediately operated to put the end mill to be replaced into the tool handle which is still in a heated and expanded state, and the end of the material clamping sleeve 2 fixedly connected with the end mill to be replaced is in contact with the tool handle at the end facing away from the hand-held sleeve 1; finally, after the tool handle cools down, the clamping piece 7 is moved along the material clamping sleeve 2 to one end of the tapered tube 3 to the maximum stroke, so that the material clamping sleeve 2 is separated from the end mill that has been installed to complete the tool change, and after the end mill that has been replaced from the tool handle cools down, the tool handle and the end mill are in an interference fit, so that the tool handle can fix the end mill; then the clamping piece 7 is moved along the material clamping sleeve 2 to one end of the tapered tube 3 to the maximum stroke, and the material clamping sleeve 2 is separated from the replaced end mill.

[0037] Example 2 (not shown in the drawings)

[0038] The tool-loading and grasping device of the end mill of the present invention comprises a sleeve body, wherein the sleeve body comprises a hand-held sleeve 1 and a material-clamping sleeve 2 which are coaxially connected and fixed by a tapered tube 3, wherein the inner wall of the material-clamping sleeve 2 is interference-fitted with the outer wall of the end mill, and the inner diameter of the material-clamping sleeve 2 is smaller than the inner diameter of the hand-held sleeve 1, and a plurality of strip grooves A4 are arranged at the pipe opening of the end of the material-clamping sleeve 2 which is away from the hand-held sleeve 1 and along the axial direction of the material-clamping sleeve 2, wherein the strip grooves A4 are evenly distributed with the axial center of the material-clamping sleeve 2 as the center, and the strip grooves A4 penetrate the material-clamping sleeve 2 and extend to the material-clamping sleeve 2. The strip groove A4 passes through the inside and outside of the sleeve body, and separates the clamping sleeve 2 and the tapered tube 3 into a plurality of clamping petals. The pipe opening of the hand-held sleeve 1 facing away from the clamping sleeve 2 is provided with a plurality of strip grooves B5 along the axial direction of the hand-held sleeve 1. The strip grooves B5 are evenly distributed with the axis of the hand-held sleeve 1 as the center, and pass through the inside and outside of the hand-held sleeve 1.

[0039] When changing the tool in this embodiment, it is only necessary to first insert the end mill to be replaced into the clamping sleeve 2 from the cutter head end, and extend the cutter head of the end mill to the corresponding position of the strip groove B5 of the hand-held sleeve 1, and then extend the cursor of the vernier caliper from one of the strip grooves B5, and measure the axial distance from the cutter head of the end mill to the tube opening of the clamping sleeve 2 at the end facing away from the hand-held sleeve 1, and axially adjust and move the end mill so that the axial length of the end mill inserted into the clamping sleeve 2 is equal to the axial length of the end mill extended out of the tool handle after the tool is installed and keep it ready for use; when separating the end mill to be replaced from the tool handle, heat the tool clamping position of the tool handle that fixes the end mill to be replaced, so that the tool handle and the end mill to be replaced are aligned. The material clamping sleeve 2 is then sleeved on the outer wall of the end mill, and the material clamping sleeve 2 is moved toward the tool handle along the axial direction of the end mill until the pipe opening of the material clamping sleeve 2 facing away from the hand-held sleeve 1 contacts the tool handle, and the end mill and the tool handle are separated by operating the hand-held sleeve 1; then, the hand-held sleeve 1 on which the end mill to be replaced has been fixed is immediately operated to put the end mill to be replaced into the tool handle which is still in a heated and expanded state, and the pipe opening of the material clamping sleeve 2 on which the end mill to be replaced is fixed facing away from the hand-held sleeve 1 contacts the tool handle; finally, after the tool handle has cooled, there is an interference fit between the tool handle and the end mill, so that the tool handle can fix the end mill; the material clamping sleeve 2 is separated from the replaced end mill.

Claims

1. The tool holding and grabbing device of the end mill is characterized by: The invention comprises a sleeve body, wherein the sleeve body comprises a hand-held sleeve (1) and a material clamping sleeve (2) which are coaxially connected and fixed via a tapered tube (3), wherein the inner wall of the material clamping sleeve (2) is interference-fitted with the outer wall of the end mill, and the inner diameter of the material clamping sleeve (2) is smaller than the inner diameter of the hand-held sleeve (1), and a plurality of strip grooves A (4) are provided at the pipe opening of the end of the material clamping sleeve (2) facing away from the hand-held sleeve (1) and along the axial direction of the material clamping sleeve (2), wherein the strip grooves A (4) are evenly distributed with the axial center of the material clamping sleeve (2) as the center, and the strip grooves A (4) penetrate the material clamping sleeve (2) and extend to the connection between the material clamping sleeve (2) and the tapered tube (3). ), and continues along the generatrix at the corresponding position of the conical tube (3) to penetrate the conical tube (3) and then continues to extend to the connection between the conical tube (3) and the hand-held sleeve (1); the strip groove A (4) penetrates the inside and outside of the sleeve body; the strip groove A (4) separates the clamping sleeve (2) and the conical tube (3) into a plurality of clamping petals; the pipe opening of the hand-held sleeve (1) facing away from the clamping sleeve (2) is provided with a plurality of strip grooves B (5) along the axial direction of the hand-held sleeve (1); the strip grooves B (5) are evenly distributed with the axial center of the hand-held sleeve (1) as the center; the strip grooves B (5) penetrate the inside and outside of the hand-held sleeve (1); The outer side wall of the clamping sleeve (2) is sleeved and connected with a clamping piece (7) for tightening the clamping flap at the position of the clamping sleeve (2); The pipe opening of the clamping sleeve (2) at one end facing away from the hand-held sleeve (1) is provided with a flange (8) outwardly, the flange (8) forms a limit stop strip of the clamp (7), and the maximum radius of the clamp (7) is greater than the radius of the flange (8); A scale area (6) is provided on the outer side wall of the hand-held sleeve (1) at a position corresponding to the strip groove B (5); The hand-held sleeve (1) is further provided with a movable plate (9) which reciprocates along the axis of the hand-held sleeve (1), the movable plate (9) being perpendicular to the axis of the hand-held sleeve (1), and the edges of the movable plate (9) and positions corresponding to the strip grooves B (5) are respectively provided with convex plates A (20) which extend into the strip grooves B (5), the width of the convex plates A (20) matches the width of the strip grooves B (5), and the radius of the convex plates A (20) is less than or equal to the radius of the hand-held sleeve (1); The end surface of one side of the movable plate (9) facing away from the clamping sleeve (2) is connected to the end of the screw of the adjusting bolt (10); the adjusting bolt (10) is threadedly connected to an end plate (11) which is detachably fixed to the pipe opening of one end of the hand-held sleeve (1) facing away from the clamping sleeve (2); the end of the adjusting bolt (10) extending into the hand-held sleeve (1) is rotatably connected to the movable plate (9) via a rotating connection device with the axis of the adjusting bolt (10) as the rotation axis; and the end of the adjusting bolt (10) extending out of the hand-held sleeve (1) is fixedly connected to a screw head (21).

2. The tool holding and grabbing device for an end mill according to claim 1, characterized in that: The wall thickness of the material clamping sleeve (2) is equal to the wall thickness of the tapered tube (3), and both are smaller than the wall thickness of the handheld sleeve (1).

3. The tool holding and grabbing device for an end mill as claimed in claim 1, characterized in that: One end of the adjusting bolt (10) extending into the hand-held sleeve (1) is coaxially fixedly connected to a connecting rod (16); the connecting rod (16) is rotatably connected to a connecting sleeve (15) fixed to the movable plate (9) via a bearing (17); a connecting cover A (18) for detachably fixedly connected to the connecting sleeve (15) is also sleeved on the connecting rod (16); the connecting cover A (18) is provided with a matching through hole A corresponding to the connecting rod (16).

4. The tool holding and grabbing device for an end mill as claimed in claim 1, characterized in that: A spring (19) is provided inside the hand-held sleeve (1) and between the movable plate (9) and the end plate (11); the adjusting bolt (10) is inserted into the spring (19); and the spring (19) is provided with a pre-compression stress.

5. The tool holding and grabbing device for an end mill as claimed in claim 1, characterized in that: The outer diameter of the end plate (11) matches the inner diameter of the hand-held sleeve (1); an annular baffle (14) is coaxially provided on the side wall of the end plate (11) and the side edge away from the clamping sleeve (2); the outer diameter of the annular baffle (14) is less than or equal to the outer diameter of the hand-held sleeve (1); the end plate (11) is provided with convex plates B extending into the strip grooves B (5) at positions corresponding to the strip grooves B (5); the width of the convex plates B matches the width of the strip grooves B (5); the radius of the convex plates B is less than or equal to the radius of the hand-held sleeve (1); the end plate (11) is detachably fixedly connected to the hand-held sleeve (1) via a connecting cover B (12); the connecting cover B (12) is provided with a through hole B (13) at a position corresponding to the adjusting bolt (10); the adjusting bolt (10) passes through the through hole B (13) and is threadedly connected to the end plate (11).

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