Assembly for packaging a cutter

Abstract

An assembly used for packaging a cutter comprises a container, a first containing space is arranged in the container, and the cutter is arranged in the first containing space. The first bearing piece is located in the first containing space. The second bearing piece is located in the first containing space and comprises a body, a near end and a far end, the distance between the near end and the base is smaller than the distance between the far end and the base, the near end is arranged on the first bearing piece, and the body is assembled with the cutter and provides radial support for the cutter. And the cover body covers the second bearing piece so as to prevent the cutter from being separated from the second bearing piece. According to the assembly for packaging the cutter, the cutter is acted from a plurality of linear dimensions and a plurality of surface dimensions, so that the cutter is fixed in a multi-dimensional manner, and tiny or even invisible damage to a cutting edge caused by collision effects such as overturning, acceleration or deceleration in the transportation process is avoided; and the cutter can meet the requirement of high-precision machining.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of packaging materials, especially a kind of packaging for cutter, facilitate the protection and transportation of cutter. BACKGROUND

[0002] Gear is a kind of mechanical parts with gear teeth, used for power transmission of mechanical system, power is transmitted by the meshing of gear teeth, the rotation speed and torque are changed, or the direction of motion is changed.

[0003] The tool for processing gear is called honing wheel, which is a tool for finishing gear tooth surface, and its shape is similar to gear, with gear structure. In gear honing, the honing wheel and the processed gear are meshed through the tooth part, and the relative sliding speed and pressure between the teeth are used to hone the gear tooth surface, so as to improve the smoothness and accuracy of the tooth surface, improve the surface roughness of the gear, reduce the gear noise, etc.

[0004] People have applied PCD material to honing wheel precision finishing tool, such as the product provided by Praewema Antriebstechnik GMBH, which obtains PCD sub-material (in the form of a round cake, including an upper layer of PCD material and a lower layer of hard alloy) for manufacturing honing wheel precision finishing tool PCD from PCD master batch in the form of a cylinder, and then bonds it to the base, and then forms the cutting edge required for processing gear on the outer edge of the PCD sub-material.

[0005] Therefore, after the processing of the cutter is completed, the cutter with numerous cutting edges around the periphery should be carefully packaged to ensure that each cutting edge is intact, so as to avoid introducing errors in subsequent finishing. INVENTION CONTENTS

[0006] One purpose of the utility model is to provide an assembly for packaging cutter, to realize multi-dimensional fixation of cutter, avoid displacement and damage to cutting edge.

[0007] Another purpose of the utility model is to provide an assembly for packaging cutter, to realize multi-dimensional fixation of cutter, facilitate transportation and sale.

[0008] An assembly for packaging cutter, comprising:

[0009] A container comprising a base and a side wall, the side wall is enclosed to form a first accommodating space, the cutter is arranged in the first accommodating space, and the outer periphery of the cutter is gap-fitted with the side wall;

[0010] A first supporting member is arranged on the base and located in the first accommodating space.

[0011] A second support member is located in the first receiving space and includes a body, a proximal end and a distal end, the distance from the proximal end to the base is less than the distance from the distal end to the base, the proximal end is arranged on the first support member, the body is assembled with the tool to provide radial support for the tool;

[0012] A cover is arranged on the second support member to prevent the tool from being removed from the second support member.

[0013] The assembly of the utility model, the side wall includes a first side wall, a second side wall, a third side wall and a fourth side wall, and the first receiving space is formed by surrounding the side walls. The first side wall, the second side wall, the third side wall and the fourth side wall form a quadrilateral, such as a square, and the intersection of the side walls is a right angle or an arc surface.

[0014] The first support member further includes a first support plane, which is assembled with the tool to support the tool and limit the movement of the tool in the first receiving space along the plane.

[0015] The edge of the first support member extends from the intersection of the first support member and the second support member to the periphery (such as 360° circumferential direction) to form the first support plane, which provides support for the tool and cooperates with the second support member to limit the movement of the tool in the first receiving space along the plane in two dimensions.

[0016] The tool arranged in the first receiving space includes an assembly hole, and the second support member is arranged in the assembly hole. Preferably, the second support member is assembled with the assembly hole in the form of a shaft hole.

[0017] The tool arranged in the first receiving space further includes a plurality of tooth-shaped cutting members (which are beneficial to tooth forming machining) distributed on the periphery of the tool, the rake face of the tool is a PCD layer, the relief face intersects the rake face, and the intersection line forms an edge.

[0018] The assembly of the utility model, the second support member is in the form of a circular truncated cone and is assembled with the assembly hole in the form of a taper.

[0019] The assembly of the utility model, the second support member is first assembled with the tool and then assembled with the first support plane.

[0020] The assembly of the utility model, the second support member is assembled with the assembly hole in the form of a shaft hole interference, the cover is arranged on the second support member and cooperates with the first support member to clamp the tool and provide axial support for the tool to prevent the tool from being removed from the second support member.

[0021] The cover is assembled with the distal end of the second support member in the form of a mortise and tenon joint, magnetic assembly and plane assembly.

[0022] The edge of the cover further arranges at least one operation key to provide a symmetrical stress point and facilitate the separation operation of the cover and the second support member.

[0023] The edge of the cover has several symmetrical operating keys, providing symmetrical force points, making it easy for people to separate the cover from the second support by two hands, one hand, or a robotic arm.

[0024] The component of this utility model also includes support members, each of which is connected at both ends to a first support member and a side wall. The height of the support member is adjusted to make it contact the tool, thereby providing more contact surface for supporting the tool. Preferably, the plane of the support member in contact with the tool is coplanar with the first support plane.

[0025] The tooth-forming tool is placed inside the container, assembled with various support components, and then covered with a lid. Simultaneously, action is applied from multiple linear dimensions (e.g., the linear dimensions of the X, Y, and Z axes in the XYZ coordinate system) and multiple planar dimensions (e.g., the XY plane, YZ plane, and XZ plane in the XYZ coordinate system). This reduces the movement space of the tooth-forming tool within the container, achieving multi-dimensional fixation of the tool and preventing minor, or even invisible, damage to the cutting edge caused by collisions such as flipping, acceleration, or deceleration during transportation. This ensures the tool is suitable for high-precision machining requirements.

[0026] For example, the PCD layer of the cutting tool maintains a roughness Ra greater than or equal to 60 nanometers, especially a flat surface greater than or equal to 0.1 micrometers.

[0027] For example: the shape error of each toothed cutting part is less than 3 micrometers, especially less than 1.5 micrometers. The tooth profile slope error of each toothed cutting part is less than 8 micrometers, especially less than 5 micrometers. The drum shape error of each toothed cutting part is less than 4 micrometers, especially less than 2 micrometers.

[0028] For example, the tool's service life for tooth forming machining of workpieces is maintained at at least 20,000 pieces, and the life fluctuation range is significantly reduced to ±10%, making the tool's service life significantly more stable.

[0029] During honing wheel dressing, the feed rate per tooth is more constant, reducing impact cutting, lowering vibration, improving tooth waviness, and reducing high-order noise in the final product. Attached Figure Description

[0030] Figure 1 A schematic diagram of an embodiment of a container used in the components of this utility model;

[0031] Figure 2 for Figure 1 A cross-sectional view at one angle is shown;

[0032] Figure 3 A schematic diagram of an embodiment of the cover body used in the components of this utility model;

[0033] Figure 4 Figure 1 is a schematic view of an embodiment of the tooth forming cutter of the present application;

[0034] Figure 5 Figure 2 is a schematic view of a cross section of the tooth forming cutter at an angle shown in Figure 1; Figure 4

[0035] Figure 6 Figure 3 is a schematic view of an embodiment of the mounting seat of the tooth forming cutter of the present application;

[0036] Figure 7 Figure 4 is a schematic view of a cross section of the mounting seat at an angle shown in Figure 3; Figure 6

[0037] Figure 5 is a schematic view of an embodiment of the cutting tool body of the present application. Figure 8 DETAILED DESCRIPTION The technical solutions of the present application are described in detail below with reference to the drawings. The embodiments of the present application are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and all of them should be covered in the scope of the claims of the present application.

[0038] As shown in Figures 1-5, the assembly of the packaging cutter of the present embodiment includes a container 40, a first supporting member 10, a second supporting member 20 and a cover 30. The container 40 includes a base 41 and a side wall 42, which is surrounded to form a first accommodating space 43, and a cutter (not shown) is arranged in the first accommodating space 43, and the outer periphery of the cutter is gap-fitted with the side wall. The side wall 42 includes a first side wall 51, a second side wall 52, a third side wall 53 and a fourth side wall 54, which are surrounded to form the first accommodating space 43. The first side wall, the second side wall, the third side wall and the fourth side wall form a quadrilateral, and the intersection of the side walls is an arc surface 55.

[0039] As shown in Figures 1-5, the assembly of the packaging cutter of the present embodiment includes a container 40, a first supporting member 10, a second supporting member 20 and a cover 30. The container 40 includes a base 41 and a side wall 42, which is surrounded to form a first accommodating space 43, and a cutter (not shown) is arranged in the first accommodating space 43, and the outer periphery of the cutter is gap-fitted with the side wall. The side wall 42 includes a first side wall 51, a second side wall 52, a third side wall 53 and a fourth side wall 54, which are surrounded to form the first accommodating space 43. The first side wall, the second side wall, the third side wall and the fourth side wall form a quadrilateral, and the intersection of the side walls is an arc surface 55. Figure 1 , Figure 2 and Figure 3 The cutter arranged in the first accommodating space further includes a plurality of tooth-shaped cutting members (for facilitating tooth forming machining) distributed on the periphery of the cutter, the rake face of which is a PCD layer, the relief face intersects the rake face, and the intersection line of the intersection forms an edge.

[0040] Each cutting member has a three-dimensional tooth profile, which at least includes a tooth end face (arranged along the radial direction of the cutter) and tooth side faces on both sides. In cutting machining, the tooth side face is the contact surface of the meshing of the two teeth moving towards each other, also known as the meshing surface.

[0041]

[0042] ​​In the process of cutting workpiece, the gear shaping cutter rotates (for example: clockwise or counterclockwise), then the two sides of the gear profile cutting workpiece are divided into rotating side and driven side according to the rotation, and both sides form the relief. The cutting edge located in the rotating side cuts the workpiece. The rotating side of the cutting workpiece has a first helix angle (γ1), and the driven side has a second helix angle (γ2). γ1≤ the design helix angle of the formed gear, and γ2≥ the design helix angle of the formed gear.

[0043] The first supporting member 10 is located in the first accommodating space 43 and is arranged on the base 41. The first supporting member 10 includes a first supporting plane 11, which is arranged to be engaged with the cutter to support the cutter and to limit the movement of the cutter in the first accommodating space along the plane. The second supporting member 20 is located in the first accommodating space 42 and includes a body 21, a proximal end 22 and a distal end 23. The distance between the proximal end 22 and the base is less than the distance between the distal end 23 and the base. The proximal end 22 is arranged on the first supporting member 10, and the body 21 is arranged to be engaged with the cutter to provide radial support for the cutter.

[0044] The first supporting plane 11 is formed by extending from the intersection of the first supporting member and the second supporting member to the periphery (for example: 360° circumferential direction). The edge of the first supporting member 10 provides support for the cutter and cooperates with the second supporting member 20 to limit the movement of the cutter in the first accommodating space along the plane in two dimensions.

[0045] Each supporting member 60 is connected to the first supporting member and one side wall at both ends. The height of the supporting member is adjusted to make it contact with the cutter, so as to provide more contact surface for supporting the cutter. If the plane where the supporting member contacts with the cutter is coplanar with the first supporting plane, the cutter will be provided with better support and the movement space of the cutter will be limited.

[0046] The cover 30 is arranged on the second supporting member to prevent the cutter from being pulled out of the second supporting member. The cover 30 is engaged with the distal end of the second supporting member, such as mortise and tenon joint, magnetic joint and plane joint. The cover 30 is also provided with a connecting tenon 31, which is engaged with a connecting mortise 25 arranged on the distal end 23, so as to facilitate the cooperation of the cover 30 and the first supporting member to clamp the cutter and provide axial support for the cutter to prevent the cutter from being pulled out of the second supporting member. When the two smooth planes are combined, the air is discharged and a local negative pressure is formed, and an external force needs to be applied to separate them. The edge of the cover 30 is also arranged with at least one operation key 70 to provide symmetrical stress points, which facilitates the separation operation of the cover and the second supporting member. These operation keys (for example: 2, 3, 4 or more) provide symmetrical stress points, which facilitates the separation of the cover and the second supporting member by people's hands or a mechanical arm.

[0047] The lid, as a separate component, is used in this embodiment and assembled with the second support for packaging the cutting tool. It is also part of the packaging body, assembled with the second support for packaging the cutting tool. For example, if the container and lid are partially connected to form a lid that flips about a rotation axis, then a separate lid is no longer necessary; the lid is already integrated into the flipping lid, serving as part of the assembly function with the second support.

[0048] See Figure 4 , Figure 5 , Figure 6 and Figure 7 The cutting tool, housed within the first accommodating space, includes a mounting hole, and a second support member is disposed within the mounting hole. Preferably, the second support member is mounted to the mounting hole as a shaft hole. The cutting tool, housed within the first accommodating space, also includes several toothed cutting elements (facilitating tooth forming machining), distributed around the periphery of the cutting tool. The rake face of these elements is a PCD layer, and the flank face intersects the rake face, with the intersection line forming the cutting edge.

[0049] The second support is first assembled with the cutting tool, and then with the first support plane. In one embodiment, the second support is frustum-shaped and tapers to the mounting hole. In another embodiment, the second support is interference-fitted with the mounting hole, and a cover is placed over the second support, cooperating with the first support to clamp the cutting tool and provide axial support to prevent the tool from slipping out of the second support.

[0050] Figure 4 This is a schematic diagram of an embodiment of the tooth-forming tool of this utility model. Figure 5 for Figure 4 The diagram shows a cross-sectional view of a tooth-forming tool at one angle. Figure 6 This is a schematic diagram of an embodiment of the mounting base for the tooth-forming tool of the present invention. Figure 7 for Figure 6 The diagram shows a cross-sectional view of the mounting bracket at one angle. (See attached image.) Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the gear-forming tool includes a mounting base 100, a fastener 300, and a cutting tool body 200. The cutting tool body 200 is assembled with the mounting base 100, and the fastener 300 is also assembled with the mounting base 100 and rests on the cutting tool body 200. The mounting base 100 is also assembled with a rotating shaft (not shown), which drives the cutting element 220 of the cutting tool body 200 in the circumferential direction to contact the workpiece to be processed and perform cutting, thereby obtaining a gear-forming workpiece, such as a gear with teeth. A tool specifically for processing gears is also called a honing wheel. It contacts the surface of the workpiece and, during simultaneous rotation, copies the tooth shape of the honing wheel onto the workpiece, thereby achieving gear forming on the workpiece.

[0051] PCD is one of the preferred materials for machining super-hard materials in the industry. In this embodiment, the cutting body 200 comprises a PCD layer 221 distributed on the end face of the cutting member 220, which usually extends along the outer side of the rotation circumferential direction, away from the rotation axis, and faces the fastener 300 falling on the cutting body 200. Under the PCD layer 221, there is also a super-hard material layer 222 made of cemented carbide, which is beneficial to the fixation of the cutting body 200 on the mounting seat 100, such as: bonding or welding, etc.

[0052] In the machining of the cutting tool, the blanks of the mounting seat 100, the fastener 300 and the cutting body 200 are first manufactured, assembled and assembled, and then the cutting body 200 is ground to form the cutting edge. In the manufacturing of a large number of cutting tools, it is found that the PCD surface is first machined, such as: wire cutting or laser turning, to form a flat surface with a roughness Ra greater than and equal to 60 nanometers, especially greater than and equal to 0.1 microns, which is the rake face, and then the relief face is machined accordingly, which improves the difference between each cutting member 220 on the cutting body 200, and tends to be arranged on the same plane, which will significantly improve the stability of the life of the cutting tool. Taking the machining of a gear as an example, it is found that the life of the cutting tool manufactured through such machining steps always remains above 20,000 workpiece inner tooth machining (such as: honing wheel machining or trimming), compared with the honing wheel cutting tool on the market, not only the machining quantity is significantly improved, but also the life fluctuation is significantly narrowed.

[0053] The laser process adopted is: the blank is installed on the rotating shaft through the center hole of the blank and rotates at a speed of 100-2000 rpm, and a pulse laser with a pulse width of 500 femtoseconds-500 nanoseconds, a repetition frequency of 10-2500 kHz and a power of 50-300 W is used to reciprocatingly scan and ablate the rotating workpiece in a direction approximately perpendicular to the center line of the workpiece to etch a reference PCD upper surface substantially perpendicular to the center axis of the blank.

[0054] The wire cutting process adopted is: the blank is installed on the rotating shaft through the center hole of the blank and rotates at a speed of 100-2000 rpm. During the rotation of the blank, discharge grinding is continuously used, which on the one hand improves the roughness of the PCD surface, and on the other hand, polishes the fine protrusions (possibly) existing on the material.

[0055] In the figure, the mounting base 100 includes the assembly hole 130, the first assembly surface 110, and the second assembly surface 120. The second assembly surface 120 is arranged around the outer periphery of the assembly hole 130 and extends outwardly around the assembly hole 130 to form a "eave". The cutting tool body 200 is arranged on the second assembly surface 120. When the rotating shaft is assembled in the assembly hole 130, the rotating shaft is rotated around the rotating shaft by an external force (such as a motor). Correspondingly, the mounting base 100 rotates synchronously with the rotating shaft. The first assembly surface 110 is located on the outer edge of the rotating direction of the assembly hole 130 and extends in the axial direction of the rotating shaft in one direction. In the opposite direction, it intersects with the second assembly surface 120. Figure 3 For the top view, the first assembly surface 110 is arranged on the second assembly surface 120.

[0056] Figure 8 For the schematic diagram of an embodiment of the cutting tool body of the present application, combined with Figure 4 、 Figure 5 、 Figure 6 and Figure 7 , as shown in Figure 8 , the cutting tool body 200 includes the cutting part 220 and the tool body 210. The tool body 210 is in the shape of a circular cake and is arranged on the second assembly surface 120 and supported by the second assembly surface 120. It has a second assembly hole 230 on it. The tool body 210 is in the shape of a plate, and the two end faces are circular. The second assembly hole 230 penetrates through the two end faces and is arranged in the axial direction of the tool body 210. The second assembly hole 230 is in contact with and assembled with the first assembly surface 110. The cutting part 220 is located at the radial outer edge of the tool body 210 away from the first assembly surface 110. In machining, it directly contacts the workpiece and implements tooth forming machining.

[0057] The fastener 300 includes a third assembly hole 310, which is in contact with and assembled with the first assembly surface 110 and is pressed on the tool body 210, thereby enhancing the firmness of the cutting tool body 200 fixed on the mounting base 100 and effectively avoiding the cutting tool body 200 from falling off the mounting base 100 during rotation due to stress, thereby causing production accidents.

[0058] The cutting part 220 includes a plurality of cutting pieces with three-dimensional tooth profiles. Each cutting piece 223 is located at the radial outer edge of the tool body 210 away from the first assembly surface 110 and is arranged in a scattered manner. Figure 1 and Figure 5 Each cutting piece 223 includes at least a tooth end face 224 facing the fastener and tooth side faces 225 and 226 on both sides. Each cutting piece 223 implements tooth forming cutting machining on the workpiece during rotation.

[0059] The tooth end face is the face on which the PCD is located, and it includes the rake face. The tooth flank includes the relief face, the cutting edge formed by the intersection of the tooth end face and the tooth flank, and the face extending from the relief face toward the second assembly face 120, which defines the partial profile of the cutting member. The tooth flank is usually at least two continuous curved surfaces that also converge toward the tooth tip 227 of the cutting member, but do not necessarily intersect at the tooth tip. It is more common for the tooth flank to intersect with the profile face that defines the tooth tip.

[0060] In the process of cutting the workpiece, the tooth forming tool rotates (for example: clockwise or counterclockwise), and the two sides of the tooth profile cutting member are divided into a rotating side and a driven side according to this. Both sides form a relief face, and the cutting edge on the rotating side cuts the workpiece. On the rotating side of the cutting member, there is a first helix angle (γ1), which is the difference between the design helix angle of the formed tooth and the relief angle of the cutting edge. On the driven side, there is a second helix angle (γ2), which is the sum of the design helix angle of the formed tooth and the relief angle of the cutting edge. γ1≤ the design helix angle of the formed tooth, and γ2≥ the design helix angle of the formed tooth. Angle γ1 and angle γ2 can also be the same.

[0061] The angle between the normal lines of the tooth end faces of any two tooth profile cutting members is less than 0.1°. The angle between the normal line of the tooth end face of each tooth profile cutting member and the rotation axis of the tooth forming tool is in the same plane, and the angle is -2° to 2°, especially -1° to 1°, and more preferably 0°.

[0062] In order to make the machining precision of the tool to the workpiece within 4 levels, the shape error of each tooth profile cutting member in the manufacturing process of the tool is less than 3 microns, especially less than 1.5 microns. The tooth profile slope error of each tooth profile cutting member is less than 8 microns, especially less than 5 microns. The drum type amount error of each tooth profile cutting member is less than 4 microns, especially less than 2 microns. The shape error (fHα), the slope error (ffα), and the drum type amount error (cα) can be detected according to the ISO 1328-1:2013 standard.

[0063] The tooth forming tool is placed in the container 40, assembled with each supporting member, covered with a cover, and subjected to action from multiple linear dimensions (for example: the linear dimensions of the X, Y, and Z axes in the XYZ coordinate system) and multiple surface dimensions (for example: the XY, YZ, and XZ planes in the XYZ coordinate system), which reduces the movement space of the tooth forming tool in the container, realizes the multi-dimensional fixation of the tool, avoids the damage to the cutting edge caused by the collision effects such as turning, acceleration, or deceleration during transportation, and ensures that the tool can meet the requirements of high-precision machining.

[0064] For example, the PCD layer of the tool maintains a flat surface with a roughness Ra greater than and equal to 60 nanometers, especially greater than and equal to 0.1 microns.

[0065] For example: the shape error of each tooth profile cutting element is less than 3 microns, especially less than 1.5 microns. The tooth profile slope error of each tooth profile cutting element is less than 8 microns, especially less than 5 microns. The drum type amount error of each tooth profile cutting element is less than 4 microns, especially less than 2 microns.

[0066] For example: the service life of the tool for tooth forming machining of the workpiece is maintained at least 20,000 pieces or more, and the life fluctuation range is significantly reduced to ±10%, so that the service life of the tool is obviously stable.

[0067] The infeed amount per tooth in the tooth direction during the honing wheel dressing process is more constant, reducing impact cutting, reducing vibration, improving tooth direction waviness, and high-order noise of the final product.

Claims

1. An assembly for packaging a knife, characterized in that, The utility model relates to a cutting tool holder, comprising: a container comprising a base and a side wall, the side wall being closed to form a first accommodating space, a cutting tool being arranged in the first accommodating space, the outer periphery of the cutting tool being in clearance fit with the side wall; a first support arranged on the base in the first accommodating space; a second support arranged in the first accommodating space, comprising a body, a proximal end and a distal end, the distance from the proximal end to the base being less than the distance from the distal end to the base, the proximal end being arranged on the first support, the body being assembled with the cutting tool to provide radial support for the cutting tool; a cover arranged on the second support to prevent the cutting tool from being pulled out of the second support.

2. The assembly for packaging knives of claim 1, wherein The side wall comprises a first side wall, a second side wall, a third side wall and a fourth side wall, which are closed to form the first accommodating space.

3. The assembly for packaging a knife of claim 2, wherein The first side wall, the second side wall, the third side wall and the fourth side wall form a quadrilateral.

4. The assembly for packaging knives of claim 3, wherein The side wall is in right angle or arc surface at the intersection.

5. The assembly for packaging a knife of claim 1, wherein The first support further comprises a first support plane, which is assembled with the cutting tool to support the cutting tool and limit the movement of the cutting tool along the plane in the first accommodating space.

6. The assembly for packaging a knife of claim 1, wherein The edge of the first support extends from the intersection of the first support and the second support to the periphery to form the first support plane, which provides support for the cutting tool and cooperates with the second support to limit the movement of the cutting tool along the plane in the first accommodating space from two dimensions.

7. The assembly for packaging a knife of claim 1, wherein The cutting tool arranged in the first accommodating space comprises an assembly hole, and the second support is arranged in the assembly hole.

8. The assembly for packaging a knife of claim 7, wherein The cutting tool arranged in the first accommodating space further comprises a plurality of tooth-shaped cutting elements distributed on the periphery of the cutting tool, the rake face of the cutting element being a PCD layer, the relief face intersecting the rake face, and the intersection line formed by the intersection forming a cutting edge.

9. The assembly for packaging a knife of claim 7, wherein The second support is in taper fit with the assembly hole.

10. The assembly for packaging a knife of claim 1, wherein The second support is assembled with the cutting tool first and then assembled with the first support plane.

11. The assembly for packaging a knife of claim 1, wherein The cutting tool arranged in the first accommodating space comprises an assembly hole, and the second support is in shaft hole interference fit with the assembly hole, the cover being arranged on the second support and cooperating with the first support to clamp the cutting tool and provide axial support for the cutting tool to prevent the cutting tool from being pulled out of the second support.

12. The assembly for packaging a knife of claim 1, wherein The cover is assembled with the distal end of the second support.

13. The assembly for packaging a knife of claim 1, wherein The edge of the cover further comprises at least one operation key, which provides a symmetrical force point to facilitate the separation operation of the cover and the second support.

14. The assembly for packaging a knife of claim 13, wherein The edge of the cover comprises a plurality of symmetrical operation keys, which provide symmetrical force points to facilitate the separation of the cover and the second support by people with both hands or one hand or a mechanical arm.

15. The assembly for packaging a knife of claim 1, wherein Further comprising a support, each end of the support being connected with the first support and a side wall.

16. The assembly for packaging a knife of claim 15, wherein The height of the support is adjusted to make it contact with the cutting tool to provide more contact surface for supporting the cutting tool.

17. The assembly for packaging a knife of claim 15, wherein The plane of the support contacting with the cutting tool is coplanar with the first support plane.

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