End mill convenient for blade replacement

Abstract

The utility model discloses an end mill with a blade convenient to replace, which belongs to the technical field of end mills and comprises a cutter handle, a cutter head is detachably mounted at the front end of the cutter handle, two chip grooves which are arranged in a central symmetry manner are formed in the cutter head, mounting grooves are formed in the chip grooves, and the milling blade is mounted in the mounting grooves. The milling cutter blade is arranged on the cutter head and fixedly connected with the cutter head through a locking bolt, positioning insertion blocks are symmetrically arranged on the back face of the milling cutter blade, positioning insertion grooves corresponding to the positioning insertion blocks are formed in the installation groove, and in addition, a positioning buffer block attached to the cutter head is arranged on the groove wall of the installation groove. The technical key points are as follows: the positioning insertion block is connected with the positioning insertion groove in an insertion manner, so that a positioning effect and a stable fixing effect can be achieved on the installation of the milling cutter blade, the overall vibration of the milling cutter caused by the shaking of the milling cutter blade in the machining process is prevented, and in addition, a positioning buffer block is additionally arranged between the milling cutter blade and the installation groove and can prevent the contact friction damage between the milling cutter blade and the installation groove.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of end mill, specifically to an end mill convenient for blade replacement. BACKGROUND

[0002] An end mill is a kind of cutter widely used in numerical control machine tool, which has cylindrical and end face cutting edges and can simultaneously perform milling of plane, groove, step surface and other forms, and has the characteristics of high efficiency and flexibility. Some end mills are composed of a shank and a blade, and the blade is fixed by clamping screws or pressure plates. When the blade is worn or damaged, it can be replaced for reuse, which has high economic efficiency.

[0003] The utility model discloses an end mill, and the end mill has the advantages that the groove has a large chip space, the chips generated during cutting of the blade are located in the groove, and the chips are guided out along the arc surface under the action of rotation force, so that the chip removal effect is good, the cutting chips are prevented from being blocked, and the heat dissipation effect is good; the fixed groove, the blade and the bolt are arranged in the cutter head, so that the blade can be quickly disassembled and replaced when damaged, and compared with the existing whole replacement, the end mill can effectively reduce the processing cost.

[0004] The end mill has a detachable connection mode, but the connection between the blade and the fixed groove is only realized by a bolt, the connection mode cannot share the torque, the force received by the blade during cutting is applied to the torque, the blade has a tendency to rotate around the bolt, the torque needs to be shared by the extrusion friction between the blade and the fixed groove wall, and therefore the wear of the blade and the fixed groove wall is accelerated under the action of frequent dynamic load. When one of the blade and the fixed groove wall is worn, the blade and the fixed groove wall cannot be tightly fitted, the blade will shake during the machining process and affect the machining precision, and therefore, the end mill convenient for blade replacement is provided. UTILITY MODEL CONTENTS

[0005] The utility model wants to solve the technical problem to provide a kind of end mill of convenient blade replacement, the cutter head of the end mill is equipped with installation groove, and symmetrically arranged positioning slot is opened in it, correspondingly, the back of milling blade is equipped with symmetrically arranged positioning plug, the plug-in connection of positioning plug and positioning slot can be positioned to the installation of milling blade, and this kind of connection mode can almost share all torsion, significantly reduce the extrusion friction of milling blade and installation groove wall, prolong service life, and the above installation mode can be more stable to the fixed effect of milling blade, prevent it from shaking in processing process and cause end mill vibration, affect the precision of processing, additionally, positioning buffer block is additionally provided between milling blade and installation groove, it can prevent the damage of contact friction between the above two, solve the technical problem that the installation mode of blade in comparative technology is not stable and reliable, easily lead to wear between blade and fixed groove wall, cannot ensure that blade does not appear shaking in processing process and affect the precision of processing.

[0006] The technical scheme adopted by the embodiment of the present application to solve the technical problems thereof is:

[0007] A kind of end mill of convenient blade replacement, including shank, its front end detachably installed with cutter head, the cutter head is equipped with two center-symmetrically arranged chip flute, and installation groove is opened in chip flute, milling blade, it is installed in installation groove, and is fixedly connected with cutter head by locking bolt, wherein, the back of milling blade is equipped with symmetrically arranged positioning plug, the installation groove is equipped with the positioning slot corresponding with positioning plug in it, in addition, installation groove wall is equipped with the positioning buffer block that is bonded with cutter head, the plug-in connection of positioning plug and positioning slot can be positioned to the installation of milling blade, and it is prevented from shaking in processing process and cause end mill vibration, affect the precision of processing, and this kind of connection mode can almost share all torsion, significantly reduce the extrusion friction of milling blade and installation groove wall, prolong service life, additionally, positioning buffer block is additionally provided between milling blade and installation groove, it can prevent the damage of contact friction between the above two.

[0008] In a possible implementation manner, the positioning buffer block is L-shaped, the inner side surface thereof is bonded with the outer side surface of the installed milling blade, and the outer side surface thereof is bonded with the groove wall of the installation groove. Based on the above structure, the positioning buffer block can fill the gap between the milling blade and the installation groove, preventing wear caused by contact between the two.

[0009] In a possible implementation manner, the shank includes a shank rod, a connecting sleeve is fixedly connected to the front end of the shank rod, a plug-in slot is formed in the connecting sleeve, a plug-in head is fixedly arranged at the rear end of the cutter head, and the plug-in head is plug-in connected with the plug-in slot. The plug-in connection of the plug-in head and the plug-in slot can realize detachable connection between the shank and the cutter head, facilitating replacement after partial wear.

[0010] In a possible implementation, the plug-in connector is provided with a non-through threaded hole on each side, the connecting sleeve is provided with a through hole corresponding to the position of the threaded hole, and the plug-in connector is fixedly connected with the connecting sleeve through symmetrically arranged mounting bolts.

[0011] In a possible implementation, the chip removal groove is provided with a plurality of ventilation grooves arranged adjacent to the mounting groove at the rear side, the ventilation grooves are arc-shaped through grooves with a rectangular cross section, and the center of the arc-shaped track is located on the central axis of the tool head.

[0012] In a possible implementation, the tool head outer wall is provided with a plurality of cooling grooves arranged in an array, and the cooling grooves are perpendicular to the central axis of the tool head.

[0013] In a possible implementation, the milling blade is provided with a through mounting counterbore at the center, and the nut portion of the locking bolt is located in the mounting counterbore after the locking bolt is tightened.

[0014] In a possible implementation, the shank is provided with symmetrically arranged clamping grooves at the middle portion.

[0015] In summary, the utility model has the following beneficial technical effects:

[0016] Through the plug-in connection of the positioning plug and the positioning slot, the installation of the milling blade can be positioned, the connection mode can share almost all the torque, the extrusion friction between the milling blade and the mounting groove wall is significantly reduced, the service life is prolonged, the milling blade can be stably fixed through the above installation mode, the milling blade is prevented from shaking during processing to cause the vibration of the milling tool and affect the processing precision, and in addition, the positioning buffer block is additionally arranged between the milling blade and the mounting groove to prevent damage caused by the contact friction therebetween.

[0017] Since the ventilation grooves are arranged on the tool head, high-speed airflow can be formed in the ventilation grooves during the rotation of the milling tool, the heat dissipation effect of the tool head is enhanced, the vibration of the milling blade caused by the deformation due to the high temperature is avoided, in addition, the cooling grooves arranged in an array are arranged on the outer wall of the tool head, the heat dissipation area of the tool head is increased, and the heat dissipation effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of the present application, and are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and explain the principles of the present application, and are not intended to limit the present application. In the drawings:

[0019] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0020] Figure 2 It is a schematic diagram of the blade mounting structure of the present application;

[0021] Figure 3 It is a schematic diagram of the milling blade structure of the present application;

[0022] Figure 4 It is a schematic diagram of the tool bit mounting structure of the present application.

[0023] In the drawings: 1, tool shank; 11, shank rod; 12, connecting sleeve; 13, plug-in slot; 14, mounting bolt; 15, clamping groove; 2, tool bit; 21, chip removal groove; 22, mounting groove; 23, positioning plug-in slot; 24, ventilation groove; 25, plug-in head; 26, cooling groove; 3, milling blade; 31, positioning plug; 32, mounting counterbore; 4, locking bolt; 5, positioning buffer block. DETAILED DESCRIPTION

[0024] The technical solution in the embodiments of the present application is to solve the problems in the above background art, and the general idea is as follows:

[0025] As shown in Figure 1 - Figure 2 The present application provides a kind of end mill for facilitating blade replacement, including tool shank 1, its front end detachably installs tool bit 2, tool bit 2 is equipped with two center-symmetrical arrangement chip removal groove 21, and chip removal groove 21 is equipped with mounting groove 22, milling blade 3, it is installed in mounting groove 22, and is fixedly connected with tool bit 2 by locking bolt 4, wherein, milling blade 3 back is equipped with symmetrically arranged positioning plug 31, and mounting groove 22 is equipped with the positioning plug-in slot 23 corresponding with positioning plug 31, in addition, mounting groove 22 groove wall is equipped with the positioning buffer block 5 that is bonded with tool bit 2, by the plug-in connection of positioning plug 31 and positioning plug-in slot 23, it can be positioned to the installation of milling blade 3 and the stable fixed effect, prevent it from shaking and causing end mill vibration in processing process, and affect the precision of processing, and this kind of connection mode can almost share all torsion, significantly reduce the extrusion friction of milling blade 3 and mounting groove 22 groove wall, prolong service life, in addition, in milling blade 3 and mounting groove 22, positioning buffer block 5 is additionally provided, which can prevent the damage of contact friction between the two.

[0026] The positioning buffer block 5 is L-shaped, the inner side surface of which is attached to the outer side surface of the installed milling blade 3, and the outer side surface of which is attached to the groove wall of the installation groove 22.

[0027] As shown in Figure 1 , Figure 4 , the shank 1 comprises a shank rod 11, the front end of which is fixedly connected with a connecting sleeve 12, the connecting sleeve 12 is provided with a plug-in groove 13, the rear end of the tool bit 2 is fixedly provided with a plug-in head 25, which is plug-in connected with the plug-in groove 13, and the plug-in connection of the plug-in head 25 and the plug-in groove 13 can realize the detachable connection between the shank 1 and the tool bit 2, so that the shank 1 can be conveniently replaced and used after partial wear; wherein the plug-in head 25 is provided with a non-through threaded hole on both sides, and the connecting sleeve 12 is provided with a through hole corresponding to the position of the threaded hole, and the plug-in head 25 is fixedly connected with the connecting sleeve 12 through the symmetrically arranged mounting bolts 14, the above structure can realize the fixation of the plug-in head 25, prevent it from being separated from the connecting sleeve 12, and the mounting bolts 14 are symmetrically arranged, so that the vibration of the end mill as a whole due to the deviation of the center of gravity during rotation can be avoided.

[0028] As shown in Figure 2 , Figure 4 , the rear side of the chip removal groove 21 is provided with a plurality of ventilation grooves 24 arranged adjacent to the installation groove 22, which are arc-shaped through grooves with a rectangular cross section, and the center of the arc-shaped track is located on the central axis of the tool bit 2, based on the above structure, when the milling cutter rotates, a high-speed airflow can be formed in the ventilation groove 24, which can enhance the heat dissipation effect of the tool bit 2 as a whole, and avoid the vibration caused by the deviation of the center of gravity due to the deformation of the milling blade 3 caused by the high temperature; in addition, a plurality of cooling grooves 26 are arranged in an array on the outer wall of the tool bit 2, and the direction of the cooling grooves 26 is perpendicular to the central axis of the tool bit 2, the above structure can increase the heat dissipation area of the tool bit 2 as a whole, and improve the heat dissipation effect.

[0029] As shown in Figure 2 , the milling blade 3 is provided with a through installation counterbore 32 at the center, and the nut part of the locking bolt 4 is located in the installation counterbore 32 after being tightened, and this structure can avoid the nut part of the locking bolt 4 to protrude and affect the flying of the milling chips.

[0030] As shown in Figure 1 , the shank rod 11 is provided with symmetrically arranged clamping grooves 15 in the middle, and the above structure can facilitate the clamps to stably hold the shank rod 11.

[0031] The use principle and use process of the utility model are as follows:

[0032] Through the plug connection of the positioning plug 31 and the positioning slot 23, the installation of the milling blade 3 can be positioned, the connection mode can almost share all the torque, the extrusion friction of the milling blade 3 and the wall of the installation slot 22 is reduced, the service life is prolonged, the milling blade 3 can be stably fixed, the milling blade 3 is prevented from shaking in the machining process to cause the vibration of the milling cutter and affect the machining precision, and the positioning buffer block 5 is additionally arranged between the milling blade 3 and the installation slot 22, so that the contact friction between the milling blade 3 and the installation slot 22 is prevented from being damaged.

[0033] In addition, since the ventilation groove 24 is arranged on the cutter head 2, when the milling cutter rotates, a high-speed airflow can be formed in the ventilation groove 24, the heat dissipation effect of the cutter head 2 is enhanced, the vibration caused by the deformation of the milling blade 3 due to the high temperature is avoided, and in addition, the cooling grooves 26 are arranged on the outer wall of the cutter head 2 in an array, the heat dissipation area of the cutter head 2 is increased, and the heat dissipation effect is improved.

[0034] Finally, it should be noted that: obviously, the above embodiments are only examples for clearly illustrating the utility model, and are not limited to the implementation mode. For ordinary skilled in the art, on the basis of the above description, other different forms of changes or changes can be made. Here, it is not necessary and impossible to enumerate all the implementation modes. The obvious changes or changes derived therefrom are still within the protection scope of the utility model.

Claims

1. An end mill facilitating blade replacement, characterized by, Include: The shank (1) can be detachably mounted with the head (2) at the front end; The head (2) is provided with two center-symmetrically arranged chip removal grooves (21), and the chip removal grooves (21) are provided with mounting grooves (22); The milling blade (3) is mounted in the mounting groove (22) and is fixedly connected with the head (2) through the locking bolt (4); Wherein, the milling blade (3) is provided with symmetrically arranged positioning insert blocks (31) on the back, the mounting groove (22) is provided with corresponding positioning insert grooves (23) corresponding to the positioning insert blocks (31), and in addition, the mounting groove (22) is provided with a positioning buffer block (5) abutting against the head (2).

2. An end mill for facilitating blade replacement according to claim 1, wherein: The positioning buffer block (5) is L-shaped, the inner side surface thereof abuts against the outer side surface of the installed milling blade (3), and the outer side surface thereof abuts against the groove wall of the mounting groove (22).

3. An end mill for facilitating blade replacement as defined in claim 1, wherein: The shank (1) includes a shank rod (11), a connecting sleeve (12) is fixedly connected at the front end of the shank rod (11), the connecting sleeve (12) is provided with a plug-in groove (13); The rear end of the head (2) is fixedly provided with a plug-in head (25), which is plug-in connected with the plug-in groove (13).

4. An end mill for facilitating blade replacement according to claim 3, wherein: The plug-in head (25) is provided with a non-through threaded hole on both sides, the connecting sleeve (12) is provided with a through hole corresponding in position to the threaded hole, and the plug-in head (25) is fixedly connected with the connecting sleeve (12) through the symmetrically arranged mounting bolts (14).

5. The end mill with easy blade replacement of claim 1, wherein: The rear side of the chip removal groove (21) is provided with a plurality of ventilation grooves (24) arranged adjacent to the mounting groove (22), which are arc-shaped through grooves with rectangular cross sections, and the centers of the arc-shaped trajectories are located on the central axis of the head (2).

6. An end mill for facilitating blade replacement as defined in claim 1, wherein: The outer wall of the head (2) is provided with a plurality of arrayed cooling grooves (26), and the directions of the cooling grooves (26) are perpendicular to the central axis of the head (2).

7. An end mill for facilitating blade replacement as defined in claim 1, wherein: The center of the milling blade (3) is provided with a through mounting counterbore (32), and after the locking bolt (4) is tightened, the nut part thereof is located in the mounting counterbore (32).

8. An end mill for facilitating blade replacement according to claim 3, wherein: The shank rod (11) is provided with symmetrically arranged clamping grooves (15) in the middle.

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