Multi-cutting-edge cutter head and cutter assembly

Abstract

The multi-blade cutter head comprises a cutter handle mounting part and at least two blade mounting parts, the cutter handle mounting part can be detachably connected with a cutter handle body, and the at least two blade mounting parts are sequentially and evenly arranged in the circumferential direction of the cutter handle mounting part at intervals in an outward extending mode. A gap between any two adjacent blade mounting parts is arranged as an inter-blade empty area, and each blade mounting part is sequentially provided with an in-blade empty area and a blade interface from inside to outside, so that the scouring force of externally sprayed cooling liquid to the middle area of the cutter can be increased by additionally arranging the inter-blade empty areas and the in-blade empty areas, cuttings are easy to discharge, and the service life of the cutter is prolonged. The phenomenon of poor cutter marks can be avoided, and the cooling effect of the cutter head can be effectively improved through the common arrangement of the inter-blade empty area and the in-blade empty area, so that the machining precision is improved.

Description

Technical Field

[0001] This utility model belongs to the field of machining tool technology, specifically relating to a multi-blade tool head and tool assembly. Background Technology

[0002] Traditional grinding wheels typically employ large disc cutters to cover the surface of the product to ensure flatness, resulting in uniform thickness of the finished product. However, large disc cutters used in machining brittle materials such as glass, ceramics, and sapphire suffer from poor chip removal due to the high-speed rotation of the cutting wheel. The external coolant spray provides insufficient scouring force to the central area of ​​the cutter, making it difficult to expel chips. Unexpelled chips move with the cutting disc during machining and are compressed against the product, creating poor tool marks and easily leading to product scrap. Utility Model Content

[0003] To address the aforementioned defects or shortcomings, this utility model provides a multi-blade cutter head and cutter assembly, aiming to solve the technical problem of poor blade marks caused by the difficulty in removing chips from the central area of ​​existing large disc cutters.

[0004] To achieve the above objectives, the first aspect of this utility model provides a multi-blade cutting disc, wherein the multi-blade cutting disc includes a handle mounting portion and at least two blade mounting portions; the handle mounting portion is detachably connected to the handle body; at least two blade mounting portions extend outward in a circumferentially evenly spaced manner from the handle mounting portion, the gap between any two adjacent blade mounting portions is defined as an inter-blade space, and each blade mounting portion is provided with an inner blade space and a blade interface from the inside to the outside.

[0005] In one embodiment of this utility model, the outer circumference of the handle mounting portion is designated as a first circumference, and the outer circumferences of at least two blade mounting portions are designated as a second circumference concentric with the first circumference. Each blade mounting portion is designed as a fan shape with the first circumference as the inner circle and the second circumference as the outer circle.

[0006] In one embodiment of this utility model, the blade mounting part includes a connecting body part and a mounting body part connected sequentially from the inside to the outside. The connecting body part is connected to the handle mounting part at a first circumference, the outer ring of the mounting body part is a second circumference, and the connecting body part and the mounting body part are connected to a third circumference between the first circumference and the second circumference. The blade inner cavity is provided on the connecting body part and extends from the first circumference to the third circumference to divide the connecting body part into two connecting ribs. The blade interface is provided on the mounting body part.

[0007] In one embodiment of this utility model, the length ratio of the handle mounting part to the blade mounting part in the radial direction is set to 1:(2.5~3.5).

[0008] In one embodiment of this utility model, the length ratio of the connecting rib to the mounting body in the radial direction is set to 1:(0.37~0.57).

[0009] In one embodiment of this utility model, the length of a single connecting rib in the arc length direction increases from the inside to the outside.

[0010] In one embodiment of this utility model, the minimum length of a single connecting rib in the arc length direction is greater than a set length, and the set length is equal to 6% of the circumference diameter of the blade interface.

[0011] In one embodiment of this utility model, the projected area of ​​the hollow area inside a single blade is 2 to 3.5 times the projected area of ​​a single connecting rib.

[0012] In one embodiment of this utility model, the thickness of the connecting rib is set to be greater than 5mm.

[0013] In one embodiment of this utility model, the length of the connecting rib in the radial direction is set to be greater than 10mm.

[0014] In one embodiment of this utility model, the ratio of the width of the blade interface in the radial direction to the width of the mounting body in the radial direction is (0.23~0.43):1.

[0015] In one embodiment of this utility model, the inner cavity of the blade is configured to conform to the shape of the blade mounting portion.

[0016] In one embodiment of this utility model, the inner cavity of the blade is centrally located in the arc length direction of the blade mounting portion.

[0017] In one embodiment of this utility model, the ratio of the orthographic projection area of ​​a single blade inner cavity to the orthographic projection area of ​​a single blade inter-cavity is 1:(4-5).

[0018] In one embodiment of this utility model, the sum of the orthographic projection areas of all the inter-blade voids and all the orthographic projection areas of all the intra-blade voids accounts for 42% to 58% of the total area of ​​the cutter head.

[0019] In one embodiment of this utility model, there are three blade mounting parts, which extend outward in a circumferentially evenly spaced manner from the handle mounting part.

[0020] In one embodiment of this utility model, the central angle of each individual blade mounting portion is set to 60°.

[0021] In one embodiment of this utility model, the central angle of each individual blade gap is set to 60°.

[0022] In one embodiment of this utility model, the mounting body protrudes from the connecting body on the side opposite to the tool holder body and has a cutting edge interface, which can be used for the installation of the grinding part.

[0023] In one embodiment of the present invention, the outer ring of the mounting body is provided with a first fastening hole communicating with the blade interface. The first fastening hole allows the first fastener to pass through and press the grinding part against the blade interface.

[0024] In one embodiment of this utility model, the mounting body is provided with at least two dynamic balance mounting holes spaced apart in the arc length direction.

[0025] In one embodiment of the present invention, the circumference where the blade interface is located is the fourth circumference. The blade interface is located on the fourth circumference which is concentric with the second circumference and penetrates the mounting body in both directions on the fourth circumference. The length of the blade mounting part in the radial direction is set to 30% to 40% of the diameter of the fourth circumference. And / or, the width of the mounting body part in the radial direction is set to 5% to 25% of the diameter of the fourth circumference.

[0026] In one embodiment of this utility model, the side of the blade mounting portion facing the extension direction of the handle body is inclined away from the handle body in the direction from the inside to the outside, and the inclination angle is set to 15° to 25°.

[0027] To achieve the above objectives, the second aspect of this utility model provides a cutting tool assembly, wherein the cutting tool assembly includes a tool holder body, a grinding part, and a multi-blade cutting disc as described above, wherein the tool holder body is detachably connected to the tool holder mounting part of the multi-blade cutting disc, and a grinding part is installed on the cutting edge interface of each cutting edge mounting part, and both ends of the grinding part are located within the cutting edge interface.

[0028] Through the above technical solution, the multi-blade cutter head provided by this utility model embodiment has the following beneficial effects:

[0029] When using the aforementioned multi-blade cutter head, since it includes a tool holder mounting part and at least two cutting edge mounting parts, with the at least two cutting edge mounting parts extending outwards at even intervals around the circumference of the tool holder mounting part, the gap between any two adjacent cutting edge mounting parts is designated as the inter-blade space. Each cutting edge mounting part is provided with an inner-blade space and a cutting edge interface from the inside out. By adding the inter-blade space and the inner-blade space, the scouring force of the externally sprayed coolant on the middle area of ​​the tool can be increased, making it easier to remove chips and avoiding the phenomenon of poor tool marks. Furthermore, the combined setting of the inter-blade space and the inner-blade space can effectively improve the cooling effect of the cutter head, thereby improving the machining accuracy.

[0030] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0031] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:

[0032] Figure 1 This is a structural schematic diagram of a multi-blade cutter head from one perspective according to an embodiment of the present invention;

[0033] Figure 2 It is based on Figure 1 Schematic diagram of the cross-sectional structure at point AA;

[0034] Figure 3 This is a structural schematic diagram of the multi-blade cutter head from another perspective according to one embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures

[0036] 100 Tool holder mounting part 101 Second fastening hole

[0037] 102 Positioning Hole 200 Blade Mounting Part

[0038] 210 Connecting body part; 211 Connecting rib.

[0039] 220 Mounting body 221 Blade interface

[0040] 222 First fastening hole; 223 Dynamic balancing mounting hole

[0041] 230° Inner blade clearance area; 300° Inter-blade clearance area

[0042] 400 Grinding Section Detailed Implementation

[0043] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0044] The multi-blade cutter head and cutter assembly of this utility model are described below with reference to the accompanying drawings.

[0045] like Figures 1 to 3 As shown, this utility model provides a multi-blade cutter head, wherein the multi-blade cutter head includes:

[0046] The tool holder mounting part 100 can be detachably connected to the tool holder body;

[0047] At least two blade mounting portions 200 are provided, which extend outward in a uniformly spaced manner around the handle mounting portion 100. The gap between any two adjacent blade mounting portions 200 is designated as an inter-blade gap 300. Each blade mounting portion 200 is provided with an inner blade gap 230 and a blade interface 221 from the inside to the outside.

[0048] When using the aforementioned multi-blade cutter head, since it includes a tool holder mounting part 100 and at least two cutting edge mounting parts 200, the at least two cutting edge mounting parts 200 are arranged to extend outward in a uniformly spaced manner around the tool holder mounting part 100. The gap between any two adjacent cutting edge mounting parts 200 is designated as an inter-blade space 300. Each cutting edge mounting part 200 is provided with an inner-blade space 230 and a cutting edge interface 221 from the inside out. By adding the inter-blade space 300 and the inner-blade space 230, the scouring force of the externally sprayed coolant on the middle area of ​​the tool can be increased, making it easier to remove chips and avoiding the phenomenon of poor tool marks. Furthermore, the combined arrangement of the inter-blade space 300 and the inner-blade space 230 can effectively improve the cooling effect of the cutter head, thereby improving the machining accuracy.

[0049] In one embodiment of this utility model, the outer circumference of the handle mounting portion 100 is designated as a first circumference, and the outer circumferences of at least two blade mounting portions 200 are designated as a second circumference concentrically arranged with the first circumference. Each blade mounting portion 200 is fan-shaped with the first circumference as the inner circle and the second circumference as the outer circle. By designing the blade mounting portion 200 as a fan shape, the dimensions of the blade mounting portion 200 along the arc length direction gradually increase from the inside to the outside. The blade interface 221 is located outside the inner cavity 230, thereby ensuring that the blade interface 221 has sufficient dimensions along the arc length direction to accommodate the grinding portion 400, thus guaranteeing grinding efficiency.

[0050] In one embodiment of this utility model, the inner cavity 230 is contoured to the blade mounting portion 200. This not only enhances its aesthetics but also makes the dimensions of the resulting connecting rib 211 easier to design and ensure. It should be noted that the contouring of the inner cavity 230 to the blade mounting portion 200 does not mean that the shape of the inner cavity 230 is completely identical to that of the blade mounting portion 200. As long as the dimensions of the inner cavity 230 gradually increase from the inside to the outside along the arc length direction, it can be considered a contouring design. For example, the inner cavity 230 can be approximated as an isosceles triangle with its apex facing inward and its base facing outward. By defining the shape of the inner cavity 230, sufficient space can be ensured in the radial direction of the blade mounting portion 200. Specifically, the diameter of the second circumference can be set as the diameter of the blade disc.

[0051] In one embodiment of this utility model, the blade mounting part 200 includes a connecting body part 210 and a mounting body part 220 connected sequentially from the inside to the outside. The connecting body part 210 is connected to the handle mounting part 100 at a first circumference. The outer ring of the mounting body part 220 is a second circumference. The connecting body part 210 and the mounting body part 220 are connected to a third circumference between the first circumference and the second circumference. The blade cavity 230 is provided on the connecting body part 210 and extends from the first circumference to the third circumference to divide the connecting body part 210 into two connecting ribs 211. The blade interface 221 is provided on the mounting body part 220. That is, the blade cavity 230 is formed on the entire radial length of the connecting body part 210. By dividing each part by the first circumference, the second circumference and the third circumference, it is beneficial to control the processing and manufacturing accuracy of the blade disc.

[0052] In one embodiment of this utility model, the inner cavity 230 is centrally located in the arc length direction of the blade mounting part 200, that is, the two connecting ribs 211 on both sides of the inner cavity 230 are set to have the same shape and size, so as to simultaneously ensure chip removal effect and blade disc dynamic balance.

[0053] In one embodiment of the present invention, the thickness of the connecting rib 211 is set to be greater than 5 mm, and / or the length of the connecting rib 211 in the radial direction is set to be greater than 10 mm. By limiting the minimum threshold of different dimensions of the connecting rib 211, the strength of the connecting body 210 can be guaranteed.

[0054] In one embodiment of this utility model, the length ratio of the tool holder mounting portion 100 to the blade mounting portion 200 in the radial direction is set to 1:(2.5 to 3.5), preferably 1:(3.1 to 3.2). Furthermore, the length ratio of the connecting rib 211 to the mounting body portion 220 in the radial direction is set to 1:(0.37 to 0.57). The radial dimension of the tool holder mounting portion 100 can correspond to the radius of the first circumference, the radial dimension of the connecting rib 211 can correspond to the difference between the radius of the third circumference and the radius of the first circumference, and the radial dimension of the mounting body portion 220 can correspond to the difference between the radius of the second circumference and the radius of the third circumference. By limiting the dimensional ratio of the tool disc in different circumferential regions, it is possible to ensure that the tool holder mounting portion 100 has sufficient strength to connect with the tool holder body while ensuring sufficient empty area, and that the mounting body portion 220 has sufficient strength for the grinding portion 400 to be mounted.

[0055] In one embodiment of this utility model, the length of a single connecting rib 211 increases progressively from the inside to the outside in the arc direction, thereby ensuring the connection strength with the mounting body 220. Simultaneously, the minimum length of a single connecting rib 211 in the arc direction is greater than a predetermined length, where the predetermined length is equal to 6% of the circumference diameter of the blade interface 221. That is, the minimum length of a single connecting rib 211 along the first circumference is the minimum length. Since the blade interface 221 can be installed by the grinding part 400, the circumference diameter of the blade interface 221 is also the tool diameter. Therefore, the width of a single connecting rib 211 along the first circumference should be greater than 6% of the tool diameter to further ensure the strength of the single connecting rib 211 and ensure that the cutter head has good rigidity during processing and is not easily deformed.

[0056] Furthermore, the minimum length of a single connecting rib 211 is set to be greater than 6% of the circumference diameter of the blade interface 221, so as to better meet the structural strength required during processing.

[0057] In one embodiment of this utility model, the projected area of ​​a single blade cavity 230 is 2 to 3.5 times the projected area of ​​a single connecting rib 211. Specifically, the setting of the projected areas of the connecting rib 211 and the blade cavity 230 should follow the principle of prioritizing clearance area. The clearance area should be increased while ensuring no surface damage during processing. Based on this, when the projected area of ​​a single blade cavity 230 is more than 2 times the projected area of ​​a single connecting rib 211, less surface damage during processing can be ensured; when the projected area of ​​a single blade cavity 230 is less than 3.5 times the projected area of ​​a single connecting rib 211, the cutter head has good rigidity and is not easily deformed.

[0058] In one embodiment of this utility model, the ratio of the projected area of ​​a single blade-in-the-blade cavity 230 to the projected area of ​​a single blade-interval cavity 300 is 1:(4-5). Since the aforementioned ratio of the projected area of ​​a single blade-in-the-blade cavity 230 to the projected area of ​​a single connecting rib 211 has been defined, by constructing the ratio of the projected area of ​​a single blade-in-the-blade cavity 230 to the projected area of ​​a single blade-interval space, the ratio of the projected area of ​​a single blade mounting portion 200 to the projected area of ​​a single blade-interval cavity 300 can be further defined to coordinate the needs of both.

[0059] In one embodiment of this invention, the sum of the projected areas of all the inter-cutting gaps 300 and all the projected areas of all the inner-cutting gaps 230 accounts for 42% to 58% of the total area of ​​the cutter head. Specifically, if the area of ​​the gaps in the cutter head is too large, the strength of the cutter head will be affected to a certain extent, and deformation will easily occur during machining. If the area of ​​the gaps is too small, the coolant permeability will be affected to a certain extent. This arrangement can ensure the contact area between the tool and the coolant during machining, improve the effect of the coolant flushing into the interior of the cutter head, ensure the cooling and chip removal of the cutter head, and avoid the formation of tool marks.

[0060] In one embodiment of this utility model, the number of blade mounting portions 200 can be three, and the three blade mounting portions 200 are arranged to extend outward in a uniformly spaced manner around the circumference of the handle mounting portion 100. Comparative experiments on multi-blade cutter discs with different numbers of blade mounting portions 200 have shown that the cutting performance is better when the number of blade mounting portions 200 is three. Of course, this utility model is not limited to this; the number of blade mounting portions 200 can also be four, five, six, etc., as long as they are evenly distributed. However, when the number exceeds twelve, the dynamic balance effect of the cutter disc will significantly decrease.

[0061] In one embodiment of this utility model, the central angle of each individual blade mounting portion 200 can be set to 60°, and / or the central angle of each individual inter-blade space 300 can be set to 60°. By limiting the central angle of each blade mounting portion 200 and each inter-blade space 300, the design and manufacturing of the entire cutter head can be simplified, and better grinding efficiency can be ensured while ensuring good chip removal.

[0062] In one embodiment of this utility model, the mounting body 220 protrudes from the connecting body 210 on the side opposite to the tool holder body and has a cutting edge interface 221, which is used for mounting the grinding part 400. By making the mounting body 220 protrude on the side opposite to the tool holder body, the thickness of the mounting body 220 can be increased to provide sufficient size for the cutting edge interface 221. Specifically, the grinding part 400 can be a sintered grinding wheel, having a first portion embedded in the cutting edge interface 221 and a second portion extending out of the cutting edge interface 221 for grinding.

[0063] In one embodiment of this utility model, the circumference where the cutting edge interface 221 is located is the fourth circumference. The cutting edge interface 221 is located on the fourth circumference, which is concentric with the second circumference, and penetrates the mounting body portion 220 bidirectionally on the fourth circumference. The radial length of the cutting edge mounting portion 200 is set to 30% to 40% of the diameter of the fourth circumference. Specifically, as described above, the diameter of the fourth circumference is the diameter of the tool. Setting the radial length of the cutting edge mounting portion 200 to 30% to 40% of the diameter of the tool means that the radial length of the inter-blade space is set to 30% to 40% of the diameter of the tool. After multiple tests, it was determined that a length lower than the above standard will lead to a decrease in the clearance area and an increase in the mass of the tool disc, which will affect the spindle drawbar's tool gripping to some extent. A length higher than the above standard will lead to an increase in the length ratio of the connecting rib 211. In order to ensure the strength of the connecting rib 211, the width of the connecting rib 211 needs to be increased simultaneously. Example: When the diameter of the tool, that is, the diameter of the fourth circumference, is 132mm, the radial length of the cutting edge mounting portion 200 can be set to 46mm.

[0064] In one embodiment of this utility model, the width of the mounting body 220 in the radial direction is set to 5% to 25% of the fourth circumferential diameter. Specifically, as described above, the fourth circumferential diameter is the tool diameter. Setting the width of the mounting body 220 in the radial direction to 5% to 25% of the tool diameter has been determined through multiple tests. If it is lower than the above standard, it will affect the combined strength of the grinding part 400 and the cutter head, which will lead to the detachment of the sintered processing blocks on the grinding part 400. If it is higher than the above standard, it will reduce the clearance area of ​​the internal space of the cutting edge.

[0065] Furthermore, the ratio of the width of the cutting edge interface 221 in the radial direction to the width of the mounting body portion 220 in the radial direction is set to (0.23 to 0.43):1, which effectively protects against deformation of the cutting tool at high speeds.

[0066] In one embodiment of this utility model, the outer ring of the mounting body 220 is provided with a first fastening hole 222 communicating with the blade interface 221. The first fastening hole 222 allows a first fastener to pass through and presses the grinding part 400 against the blade interface 221. That is, the blade interface 221 is designed as a wrap-around type, and by adding the first fastener, the connection between the grinding part 400 and the cutter head is made more stable. Specifically, the grinding part 400 can also be bonded into the blade interface 221. In this utility model, the grinding part 400 is first bonded into the blade interface 221, and then secured by the first fastener, which includes, but is not limited to, a fastening pin.

[0067] In one embodiment of this utility model, the mounting body 220 is provided with at least two dynamically balanced mounting holes 223 spaced apart in the arc length direction. By adding the dynamically balanced mounting holes 223, it is possible to ensure that the cutter head has a better dynamic balance by selectively inserting dynamically balanced adjustment components into different dynamically balanced mounting holes 223. Specifically, at least two dynamically balanced mounting holes 223 are located inside the cutting edge interface 221. The dynamically balanced mounting holes 223 can be threaded holes, and the dynamically balanced adjustment components can be threaded components inserted into the threaded holes.

[0068] In one embodiment of this utility model, the side of the blade mounting portion 200 facing the extension direction of the tool holder body is inclined away from the tool holder body in the direction from the inside to the outside, and the inclination angle is set to 15° to 25°. The inclination angle of the blade mounting portion 200 can improve the stress resistance and deformation resistance of the tool disc base, and at the same time suppress the vibration of the grinding portion 400 during the processing.

[0069] Example 1:

[0070] The diameter of the handle mounting part (first circumference diameter) is set to 40mm, the diameter of the blade mounting part (second circumference diameter) is set to 138mm, the outer circumference diameter of the connecting body part (third circumference diameter) is set to 105mm, the diameter of the blade interface (fourth circumference diameter) is set to 132mm, the number of blade mounting parts is three, and the central angle of the single blade gap area and the single blade mounting part on the blade disc is set to 60°.

[0071] Furthermore, this utility model also provides a cutting tool assembly, which includes a tool holder body, a grinding part 400, and a multi-blade cutting disc as described above. The tool holder body is detachably connected to the tool holder mounting part 100 of the multi-blade cutting disc. Each blade mounting part 200 has a grinding part 400 mounted on its blade interface 221, and both ends of the grinding part 400 are located within the blade interface 221. Since the cutting tool assembly adopts all the technical solutions of the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0072] Specifically, the tool holder body and the multi-blade cutting disc are separate units, and the tool holder mounting part 100 of the multi-blade cutting disc has a positioning hole 102 at its center. The tool holder mounting part 100 has at least two second fastening holes 101 evenly spaced on the same circumference with the central axis of the positioning hole 102 as the center line. The positioning pin on the tool holder body can be inserted into the positioning hole 102, and the locking thread can be inserted into the second fastening hole 101 and connect the tool holder mounting part 100 and the tool holder body, so as to facilitate the replacement and maintenance of the tool holder body and the cutting disc.

[0073] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0074] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0076] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A multi-blade cutter head, characterized in that, The multi-blade cutter head includes: The tool holder mounting part (100) can be detachably connected to the tool holder body; At least two blade mounting portions (200) are arranged to extend outward in a uniformly spaced manner in the circumference of the handle mounting portion (100). The gap between any two adjacent blade mounting portions (200) is set as an inter-blade gap (300). Each blade mounting portion (200) is provided with an inner blade gap (230) and a blade interface (221) from the inside to the outside.

2. The multi-blade cutter head according to claim 1, characterized in that, The outer circumference of the handle mounting portion (100) is designated as the first circumference, and the outer circumference of at least two blade mounting portions (200) is designated as the second circumference concentric with the first circumference. Each blade mounting portion (200) is designated as a fan-shaped portion with the first circumference as the inner circle and the second circumference as the outer circle.

3. The multi-blade cutter head according to claim 2, characterized in that, The blade mounting portion (200) includes a connecting body portion (210) and a mounting body portion (220) connected sequentially from the inside to the outside. The connecting body portion (210) is connected to the handle mounting portion (100) at the first circumference. The outer ring of the mounting body portion (220) is the second circumference. The connecting body portion (210) and the mounting body portion (220) are connected at the third circumference between the first circumference and the second circumference. The blade cavity (230) is provided on the connecting body portion (210) and extends from the first circumference to the third circumference to divide the connecting body portion (210) into two connecting ribs (211). The blade interface (221) is provided on the mounting body portion (220).

4. The multi-blade cutter head according to claim 3, characterized in that, The length ratio of the handle mounting portion (100) to the blade mounting portion (200) in the radial direction is set to 1:(2.5~3.5); And / or, the length ratio of the connecting rib (211) to the mounting body (220) in the radial direction is set to 1:(0.37~0.57); And / or, the length of a single connecting rib (211) in the arc length direction increases from the inside to the outside; And / or, the minimum length of a single connecting rib (211) in the arc length direction is greater than a set length, the set length being equal to 6% of the circumference diameter of the blade interface (221); And / or, the projected area of ​​a single blade cavity (230) is 2 to 3.5 times the projected area of ​​a single connecting rib (211); And / or, the thickness of the connecting rib (211) is set to be greater than 5 mm; And / or, the length of the connecting rib (211) in the radial direction is set to be greater than 10 mm; And / or, the ratio of the width of the blade interface (221) in the radial direction to the width of the mounting body (220) in the radial direction is (0.23 to 0.43):

1.

5. The multi-blade cutter head according to claim 1, characterized in that, The inner cavity (230) is configured to conform to the shape of the blade mounting part (200); And / or, the inner cavity (230) is centrally located in the arc length direction of the blade mounting portion (200).

6. The multi-blade cutter head according to claim 1, characterized in that, The ratio of the projected area of ​​a single blade cavity (230) to the projected area of ​​a single blade inter-cavity (300) is 1:(4-5); And / or, the sum of the projected areas of all the inter-blade voids (300) and all the projected areas of all the intra-blade voids (230) accounts for 42% to 58% of the total area of ​​the cutter head; And / or, the number of the blade mounting portions (200) is three, and the three blade mounting portions (200) are arranged to extend outward in a circumferentially evenly spaced manner from the handle mounting portion (100); And / or, the central angle of each of the individual blade mounting portions (200) is set to 60°; And / or, the central angle of each of the individual blade gaps (300) is set to 60°.

7. The multi-blade cutter head according to claim 3, characterized in that, The mounting body (220) protrudes from the connecting body (210) on the side opposite to the handle body and has the cutting edge interface (221) provided therein, which allows the grinding part (400) to be installed. And / or, the outer ring of the mounting body (220) is provided with a first fastening hole (222) communicating with the blade interface (221), the first fastening hole (222) allows the first fastener to pass through and press the grinding part (400) against the blade interface (221); And / or, the mounting body (220) is provided with at least two dynamic balance mounting holes (223) spaced apart in the arc length direction.

8. The multi-blade cutter head according to claim 3, characterized in that, The circumference where the blade interface (221) is located is the fourth circumference. The blade interface (221) is located on the fourth circumference which is concentric with the second circumference and penetrates the mounting body (220) in both directions on the fourth circumference. Wherein, the length of the blade mounting portion (200) in the radial direction is set to 30% to 40% of the fourth circumferential diameter; and / or, the width of the mounting body portion (220) in the radial direction is set to 5% to 25% of the fourth circumferential diameter.

9. The multi-blade cutter head according to any one of claims 1 to 8, characterized in that, The blade mounting part (200) is inclined in a direction away from the handle body on the side facing the extension direction of the handle body, and the inclination angle is set to 15° to 25°.

10. A cutting tool assembly, characterized in that, The tool assembly includes a handle body, a grinding section (400), and a multi-blade cutting disc according to any one of claims 1 to 9. The handle body is detachably connected to the handle mounting section (100) of the multi-blade cutting disc. Each blade mounting section (200) has a grinding section (400) mounted on its blade interface (221), and both ends of the grinding section (400) are located within the blade interface (221).

Images