Wheel type tool bit design method and wheel type tool bit

Abstract

The invention provides a wheel type tool bit design method and a wheel type tool bit, and relates to the technical field of mining equipment. The wheel type tool bit design method comprises the steps that the optimal tool distance is obtained; obtaining the size of a wheel type tool bit according to the roadway size; drawing an unfolded base drawing according to the size of the wheel type tool bit; drawing a first auxiliary line and a second auxiliary line on the unfolded base map according to the optimal cutter spacing; arranging an edge cutter hob and a positive cutter hob according to the first auxiliary line and the second auxiliary line to obtain a hob arrangement scheme; and designing a wheel type tool bit according to the hob arrangement scheme. A scientific and effective method is provided for the design of a core rock breaking mechanism of hard rock mining equipment, namely, the cutter space arrangement design of the wheel type cutter bit, the hobbing cutter in the wheel type cutter bit can circularly apply impact rolling action on the rock, and the rolling rock breaking efficiency of the hobbing cutter is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mining equipment, and in particular to a wheel cutter head design method and the wheel cutter head. Background Art

[0002] Mechanized mining of hard rock ore bodies is typically accomplished using hard rock mining equipment that uses roller cutters to break rock. In recent years, equipment manufacturers have actively developed related hard rock mining equipment. The design of the equipment's core rock-breaking mechanism—the arrangement of the roller cutters on the cylindrical wheel cutter head—is primarily based on the design of the roller cutters used in TBM (Tunnel Boring Machine) cutterheads.

[0003] However, the disc cutters on the TBM cutterhead are arranged in a flat surface, while the disc cutters on the cylindrical wheel cutter head of hard rock mining equipment are arranged along the cylindrical surface. There are differences in their structural forms and working conditions. The disc cutter design of the TBM cutterhead is not completely suitable for the cylindrical wheel cutter head of hard rock mining equipment.

[0004] Therefore, there is still a lack of an effective design method for the cutter arrangement scheme of the wheel cutter head of existing hard rock mining equipment. Summary of the Invention

[0005] In order to solve the problems existing in the prior art, one of the objectives of the present invention is to provide a method for designing a wheel cutter head.

[0006] The present invention provides the following technical solutions:

[0007] A method for designing a wheel cutter head, comprising:

[0008] Obtaining an optimal cutter spacing, where the optimal cutter spacing is the cutter spacing when achieving an optimal rock breaking effect;

[0009] Obtain the size of the wheel cutter head according to the roadway size;

[0010] Draw an expanded base map according to the size of the wheel cutter head, wherein the expanded base map is rectangular, the length of the expanded base map is equal to the circumference of the wheel cutter head, and the width of the expanded base map is equal to the thickness of the wheel cutter head;

[0011] Drawing a first auxiliary line and a second auxiliary line on the expanded base map according to the optimal knife spacing, wherein the first auxiliary lines are parallel to the length direction of the expanded base map and are evenly arranged along the width direction of the expanded base map, and the spacing between two adjacent first auxiliary lines is equal to the optimal knife spacing; the second auxiliary lines are parallel to the width direction of the expanded base map and are evenly arranged along the length direction of the expanded base map, and the spacing between two adjacent second auxiliary lines is equal to four to six times the optimal knife spacing;

[0012] Arrange the side cutter hob and the main cutter hob according to the first auxiliary line and the second auxiliary line to obtain a hob arrangement plan;

[0013] The wheel cutter head is designed according to the hob arrangement scheme.

[0014] As a further optional solution to the wheel cutter head design method, the step of arranging the side cutter hob and the main cutter hob according to the first auxiliary line and the second auxiliary line includes:

[0015] Arranging edge cutters and rollers at intervals at the intersections of the long sides of the unfolded base map and the second auxiliary lines;

[0016] Designing a spiral line along the intersection of the first auxiliary line and the second auxiliary line, and arranging a spur cutter hob at the intersection of the spiral line and the second auxiliary line;

[0017] Wherein, the front cutter hob and the side cutter hob are respectively located on different second auxiliary lines.

[0018] As a further optional solution to the wheel cutter head design method, the step of designing a spiral line along the intersection of the first auxiliary line and the second auxiliary line includes:

[0019] Two spiral lines are designed along the intersection of the first auxiliary line and the second auxiliary line. The two spiral lines are arranged along the width direction of the unfolded base map, and the two spiral lines are parallel to each other.

[0020] As a further optional solution to the wheel cutter head design method, the step of designing a spiral line along the intersection of the first auxiliary line and the second auxiliary line includes:

[0021] Designing two spiral lines along the intersection of the first auxiliary line and the second auxiliary line, the two spiral lines are arranged along the width direction of the expanded base map, and the two spiral lines are symmetrically arranged about the long axis of the expanded base map;

[0022] The long axis of the expanded base map is the central axis of the expanded base map parallel to the length direction.

[0023] As a further optional solution to the wheel cutter head design method, the step of designing a spiral line along the intersection of the first auxiliary line and the second auxiliary line includes:

[0024] A first spiral line and multiple second spiral lines are designed along the intersection of the first auxiliary line and the second auxiliary line, the first spiral line is inclined relative to the first auxiliary line, the second spiral line is inclined relative to the first auxiliary line, and the inclination direction of the second spiral line is opposite to the inclination direction of the first spiral line. The multiple second spiral lines are parallel to each other, and the multiple second spiral lines are arranged along the length direction of the expanded base map and intersect with the first spiral line respectively.

[0025] As a further optional solution to the wheel cutter head design method, there are multiple hob cutter arrangement schemes. After the step of designing the wheel cutter head according to the hob cutter arrangement schemes, the method further includes:

[0026] Each wheel cutter head is tested separately, and the rock breaking effect, rock breaking force and rock breaking specific energy of each wheel cutter head are compared to determine the optimal arrangement of the cutters and the corresponding wheel cutter head.

[0027] As a further optional solution to the wheel cutter head design method, the step of obtaining the optimal cutter spacing includes:

[0028] Set up multiple groups of double rollers with different roller spacings, test each group of double rollers separately, compare the rock breaking effect, rock breaking force and rock breaking specific energy of each group of double rollers, and determine the optimal roller spacing.

[0029] Another object of the present invention is to provide a wheel cutter head.

[0030] The present invention provides the following technical solutions:

[0031] A wheel cutter head, the wheel cutter head being designed using the above-mentioned wheel cutter head design method;

[0032] The wheel cutter head includes a cutter head body and a hob. The cutter head body is cylindrical. The hob is arranged on the cylindrical surface of the cutter head body. The hob includes an edge cutter hob and a straight cutter hob. The edge cutter hob is located at both ends of the cylindrical surface along the axial direction, and the straight cutter hob is located in the middle of the cylindrical surface along the axial direction.

[0033] As a further optional solution for the wheel cutter head, a plurality of grooves are provided on the outer edge of the hob, and the plurality of grooves are arranged at intervals along the circumference of the hob, and a rolling angle is formed between two adjacent grooves. The rolling angle is arranged in an arc shape, and the center of the rolling angle coincides with the center of the hob.

[0034] As a further optional solution for the wheel cutter head, four grooves are provided, and the four grooves are evenly arranged along the circumference of the hob. The grooves have intersecting first groove walls and second groove walls, and the first groove walls of two adjacent grooves are perpendicular to each other.

[0035] One end of the first groove wall away from the second groove wall coincides with an end of one of the roll angles, and one end of the second groove wall away from the first groove wall coincides with an end of another adjacent roll angle.

[0036] The embodiments of the present invention have the following beneficial effects:

[0037] When designing a wheel cutter head using the above-mentioned wheel cutter head design method, the optimal cutter spacing and wheel cutter head dimensions are first determined. A rectangular expansion base map is then drawn based on the wheel cutter head dimensions. First and second auxiliary lines are then drawn on the expansion base map based on the optimal cutter spacing. The side cutters and main cutters are then arranged according to the first and second auxiliary lines, thereby obtaining a cutter layout scheme. Finally, the wheel cutter head is designed based on the cutter layout scheme. Thus, the present invention provides a scientific and effective method for designing the tool space layout of a wheel cutter head, the core rock-breaking mechanism of hard rock mining equipment.

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0040] Figure 1 A flowchart showing the steps of a wheel cutter head design method provided by an embodiment of the present invention is shown;

[0041] Figure 2 A schematic diagram of a spiral line in a wheel cutter head design method provided by an embodiment of the present invention is shown;

[0042] Figure 3 A schematic diagram showing a spiral line in a wheel cutter head design method provided by another embodiment of the present invention is shown;

[0043] Figure 4 A schematic diagram showing a spiral line in a wheel cutter head design method provided by another embodiment of the present invention is shown;

[0044] Figure 5 A schematic structural diagram of a hob in a wheel cutter head provided by an embodiment of the present invention is shown;

[0045] Figure 6 A schematic diagram of the working state of a hob in a wheel cutter head provided by an embodiment of the present invention is shown.

[0046] Description of main component symbols:

[0047] 10-Expanded base map; 20-First auxiliary line; 30-Second auxiliary line; 40-Side cutter hob; 50-Straight cutter hob; 60-Spiral line; 61-First spiral line; 62-Second spiral line; 100-Groove; 110-First groove wall; 120-Second groove wall; 200-Rolling angle; 210-First endpoint; 220-Second endpoint; 300-Mounting through hole. DETAILED DESCRIPTION

[0048] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0049] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. Conversely, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0050] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0051] Furthermore, 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 the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the template description herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0053] The inventors of this application discovered that existing rock-breaking technologies primarily utilize the vertical static pressure and rolling cutting of the cutters to break rock, while impact rolling technology is rarely used to achieve this. This is because impact rolling technology often requires the addition of an impact loading system to the cutters. While this technology can achieve impact rolling rock breaking for a single cutter, installing an impact loading system on all cutters increases the complexity of the rock-breaking mechanism of mining equipment.

[0054] When utilizing the vertical static pressure and rolling action of a disc cutter to break rock, the cutter ring, as the only component in contact with the rock, directly determines its performance. However, the continuous rolling contact of the cutter ring's cutting edge causes significant wear, making it a consumable component of rock-breaking equipment. Adding inserts to the cutter ring's cutting edge is commonly used to improve the rock-breaking performance and wear resistance of disc cutters. However, the ball teeth of insert cutters are closely spaced, and thus rely primarily on the continuous rolling action of a large number of inserts, failing to achieve impact rolling rock-breaking.

[0055] Furthermore, in recent years, various equipment manufacturers have been actively developing related hard rock mining equipment. The design of the equipment's core rock-breaking mechanism—the arrangement of the disc cutters on the cylindrical wheel cutter head—is primarily based on the disc cutter design of the TBM cutterhead. However, the disc cutters on the TBM cutterhead are arranged flat, while the disc cutters on the cylindrical wheel cutter head of hard rock mining equipment are arranged along a cylindrical surface. Due to the differences in their structural form and operating conditions, the disc cutter design of the TBM cutterhead is not fully applicable to the cylindrical wheel cutter head of hard rock mining equipment.

[0056] Example

[0057] In response to the above technical problems, this embodiment provides a wheel cutter head design method, specifically a wheel cutter head tool arrangement design method.

[0058] See also Figure 1 , the wheel cutter head design method includes the following steps:

[0059] S1, obtain the optimal blade spacing.

[0060] The optimal cutter spacing is the cutter spacing when the optimal rock breaking effect is achieved.

[0061] In some embodiments, the step of obtaining the optimal blade spacing includes:

[0062] Multiple groups of double rollers with different cutter spacings were set up, and each group of double rollers was tested separately. The rock breaking effect, rock breaking force and rock breaking specific energy of each group of double rollers were compared to determine the optimal cutter spacing.

[0063] Specifically, the cutter spacing is set to multiple groups of spacing values between 20 and 500 mm, and corresponding pairs of cutters are set according to each group of spacing values. Through rolling rock breaking tests or numerical simulations of hard rock specimens, the crack penetration between the rocks after double-cut rock breaking, the normal force of rock breaking, the rolling force of rock breaking, the lateral force of rock breaking, and the rock breaking specific energy (i.e., the work done per unit rock peeling), are compared. The optimal cutter spacing is selected when the rock cracks between the rocks are penetrated, the rock breaking force is small, and the rock breaking specific energy is low.

[0064] S2, obtain the size of the wheel cutter head according to the roadway size.

[0065] Specifically, the roadway dimensions include the roadway height and width, and the wheel cutter head dimensions include the wheel cutter head diameter, wheel cutter head circumference, and wheel cutter head thickness. The wheel cutter head circumference is calculated from the wheel cutter head diameter, and the wheel cutter head thickness is the dimension of the wheel cutter head along the axial direction.

[0066] When the wheel cutter head is a vertical wheel cutter head with a horizontal axis, the diameter of the wheel cutter head is the roadway height minus 0.5-1m to ensure the wheel cutter head's movement in the roadway. In addition, the thickness of the wheel cutter head is 1 / 4-1 / 3 of the roadway width to ensure the rock breaking efficiency of the wheel cutter head.

[0067] When the wheel cutter head is a horizontal wheel cutter head with a vertical axis, the diameter of the wheel cutter head is the roadway width minus 0.5-1m to ensure the wheel cutter head's movement in the roadway. In addition, the thickness of the wheel cutter head is 1 / 4-1 / 3 of the roadway height to ensure the rock breaking efficiency of the wheel cutter head.

[0068] S3, drawing an expanded base map 10 according to the size of the wheel cutter head.

[0069] Please combine Figure 2 The expanded base 10 is rectangular. The length of the expanded base 10 is equal to the perimeter of the wheel cutter head, and the width of the expanded base 10 is equal to the thickness of the wheel cutter head.

[0070] S4, drawing a first auxiliary line 20 and a second auxiliary line 30 on the unfolded base map 10 according to the optimal tool spacing.

[0071] Please combine Figure 2 The first auxiliary lines 20 are parallel to the length of the expanded base map 10 and are evenly spaced along the width of the expanded base map 10. The spacing between two adjacent first auxiliary lines 20 is equal to the optimal knife spacing. The second auxiliary lines 30 are parallel to the width of the expanded base map 10 and are evenly spaced along the length of the expanded base map 10. The spacing between two adjacent second auxiliary lines 30 is four to six times the optimal knife spacing.

[0072] Specifically, the expanded base image 10 has two long sides and two short sides. Taking the midpoints or endpoints of the short sides of the expanded base image 10 as base points and the optimal knife spacing as equal intervals, multiple straight lines are drawn in the direction parallel to the long sides, which are the first auxiliary lines 20.

[0073] Similarly, with the midpoint or end point of the long side of the unfolded base map 10 as the base point and four to six times the optimal knife spacing as the equal intervals, multiple straight lines are drawn in the direction parallel to the short side, which are the second auxiliary lines 30.

[0074] S5 , arranging the side cutter hob 40 and the main cutter hob 50 according to the first auxiliary line 20 and the second auxiliary line 30 to obtain a hob arrangement plan.

[0075] The intersection of the first auxiliary line 20 and the second auxiliary line 30 is the installation position of the embedded hob.

[0076] Specifically, the steps of arranging the side cutter hob 40 and the main cutter hob 50 according to the first auxiliary line 20 and the second auxiliary line 30 include:

[0077] The edge cutters 40 are arranged at intervals at the intersections of the long sides of the developed base map 10 and the second auxiliary lines 30 .

[0078] A spiral line 60 is designed along the intersection of the first auxiliary line 20 and the second auxiliary line 30 , and a spur cutter 50 is arranged at the intersection of the spiral line 60 and the second auxiliary line 30 .

[0079] The main cutter hob 50 and the side cutter hob 40 are respectively located on different second auxiliary lines 30 .

[0080] It can be understood that the intersections of the long sides of the expanded base pattern 10 with the second auxiliary lines 30 are spaced apart along the length of the expanded base pattern 10, with a side cutter 40 positioned at each intersection. On this basis, by ensuring that the spur cutters 50 and side cutter 40 are located on different second auxiliary lines 30, the spur cutters 50 and side cutter 40 are alternately arranged along the circumference of the wheel conductor.

[0081] Please combine Figure 2 In some embodiments, the arrangement of the positive cutter hob 50 can be a parallel rotation arrangement. Accordingly, the step of designing the spiral line 60 along the intersection of the first auxiliary line 20 and the second auxiliary line 30 includes:

[0082] Two spiral lines 60 are designed along the intersection of the first auxiliary line 20 and the second auxiliary line 30 . The two spiral lines 60 are arranged along the width direction of the unfolded base map 10 , and the two spiral lines 60 are parallel to each other.

[0083] The spiral line 60 is extended along the length direction of the expanded base image 10 as a whole, and turns back and forth between the two long sides of the expanded base image 10 .

[0084] Please combine Figure 3 In other embodiments, the arrangement of the positive cutter hobs 50 may also be parallel and symmetrical. Accordingly, the step of designing the spiral line 60 along the intersection of the first auxiliary line 20 and the second auxiliary line 30 includes:

[0085] Two spiral lines 60 are designed along the intersection of the first auxiliary line 20 and the second auxiliary line 30 . The two spiral lines 60 are arranged along the width direction of the unfolded base map 10 . The two spiral lines 60 are symmetrically arranged about the long axis of the unfolded base map 10 .

[0086] The long axis of the expanded base image 10 is the central axis of the expanded base image 10 parallel to the length direction.

[0087] Similarly, the spiral line 60 extends along the length direction of the expanded base map 10 as a whole and turns back between the two long sides of the expanded base map 10 .

[0088] Please combine Figure 4 In some other embodiments, the arrangement of the positive cutter hobs 50 may also be parallel and intersecting. Accordingly, the step of designing the spiral line 60 along the intersection of the first auxiliary line 20 and the second auxiliary line 30 includes:

[0089] A first spiral line 61 and multiple second spiral lines 62 are designed along the intersection of the first auxiliary line 20 and the second auxiliary line 30. The first spiral line 61 is inclined relative to the first auxiliary line 20, and the second spiral line 62 is inclined relative to the first auxiliary line 20, with the inclination direction of the second spiral line 62 being opposite to the inclination direction of the first spiral line 61. The multiple second spiral lines 62 are parallel to each other and arranged along the length of the expanded base map 10, intersecting with the first spiral line 61 respectively.

[0090] S6, design the wheel cutter head according to the hob arrangement plan.

[0091] It is understandable that based on the positional distribution of the side cutter hobs 40 and the spur cutter hobs 50 on the expanded base map 10, the installation positions of the side cutter hobs 40 and the spur cutter hobs 50 on the wheel cutter head can be determined in a one-to-one correspondence. By using the curved surface to convert the planar tool layout points into spatial positions, the corresponding wheel cutter head can be designed.

[0092] In some embodiments, there are multiple hob cutter arrangement schemes. That is, in step S5, multiple hob cutter arrangement schemes can be obtained by using the same or different arrangements of the spur cutters 50.

[0093] Accordingly, after step S6, the above wheel cutter head design method further includes the following steps:

[0094] S7. Test each wheel cutter head separately, compare the rock breaking effect, rock breaking force and rock breaking specific energy of each wheel cutter head, and determine the optimal disc cutter arrangement scheme and corresponding wheel cutter head.

[0095] Specifically, each designed wheel cutter head is manufactured and subjected to rolling rock crushing tests on hard rock specimens. Alternatively, a three-dimensional numerical model of each designed wheel cutter head is built and numerical simulations are performed. The rock crushing performance of different wheel cutter heads is compared, and the optimal cutter arrangement is selected, which provides the highest rock crushing capacity, the lowest rock crushing force, and the lowest rock crushing energy density.

[0096] In summary, when designing a wheel cutter head using the above-described wheel cutter head design method, the optimal cutter spacing and wheel cutter head dimensions are first determined. A rectangular unfolded base map 10 is then drawn based on the dimensions of the wheel cutter head. A first auxiliary line 20 and a second auxiliary line 30 are then drawn on the unfolded base map 10 based on the optimal cutter spacing. The side cutters 40 and the main cutters 50 are then arranged based on the first auxiliary lines 20 and the second auxiliary lines 30, thereby obtaining a cutter layout scheme. Finally, the wheel cutter head is designed based on the cutter layout scheme. Thus, the present invention provides a scientific and effective method for designing the core rock-breaking mechanism of hard rock mining equipment—that is, the tool space layout design of a wheel cutter head.

[0097] This embodiment further provides a wheel cutter head, specifically a wheel cutter head used in a mobile hard rock mining machine. The wheel cutter head is designed using the above-mentioned wheel cutter head design method.

[0098] Specifically, the wheel cutter head comprises a cutter head body and a cutter blade. The cutter head body is cylindrical, and the cutter blade is disposed on the cylindrical surface of the cutter head body. The cutter blades include a side cutter blade 40 and a straight cutter blade 50. The side cutter blade 40 is located at both ends of the cylindrical surface along the axis, while the straight cutter blade 50 is located in the middle of the cylindrical surface along the axis.

[0099] See also Figure 5In some embodiments, a plurality of grooves 100 are provided on the outer edge of the hob. The grooves 100 are spaced apart along the circumference of the hob, and a roll angle 200 is formed between two adjacent grooves 100. The roll angle 200 is arranged in an arc shape, and the center of the roll angle 200 coincides with the center of the hob.

[0100] In addition, a circular mounting hole 300 is provided in the center of the cutter ring of the hob. The mounting hole 300 is used to cooperate with the cutter body, bearings, cutter shaft and other components to mount the hob on the hob base.

[0101] It should be noted that the roll angle 200 has a first endpoint 210 and a second endpoint 220. The first endpoint 210 is where the roll angle 200 meets the groove wall of one groove 100, and the second endpoint 220 is where the roll angle 200 meets the groove wall of the other groove 100.

[0102] See also Figure 6 Taking the illustrated perspective as an example, the cutter rotates clockwise during operation. When the circular rolling angle 200 contacts the rock, the cutter rolls the rock to achieve rolling and breaking. Before impact breaking, only the second endpoint 220 of the rolling angle 200 contacts the rock. The cutter then rotates around the second endpoint 220 until the first endpoint 210 of the adjacent rolling angle 200 and the groove wall of the groove 100 jointly impact and break the rock. This allows the cutter to cyclically apply an impact rolling action to the rock, improving its rolling and breaking efficiency without requiring an additional impact loading system.

[0103] Please refer again Figure 5 In this embodiment, four grooves 100 are provided, and the four grooves 100 are evenly arranged along the circumference of the hob. The grooves 100 have intersecting first groove walls 110 and second groove walls 120, and the first groove walls 110 of two adjacent grooves 100 are perpendicular to each other. In this case, the first groove walls 110 of the four grooves 100 are respectively located on the sides of a square.

[0104] In addition, the end of the first groove wall 110 away from the second groove wall 120 coincides with the end of one of the roll angles 200, specifically, coincides with the first endpoint 210 of one of the roll angles 200. The end of the second groove wall 120 away from the first groove wall 110 coincides with the end of another adjacent roll angle 200, specifically, coincides with the second endpoint 220 of another adjacent roll angle 200.

[0105] For example, the cutter ring of the hob may be cut by a conventional disc hob, that is, the groove 100 is cut on the outer edge of the cutter ring.

[0106] Alternatively, the cutter ring of the hob can also be processed by additive manufacturing of a square hob, that is, a rolling angle of 200 is welded on the square hob.

[0107] In all examples shown and described herein, any specific values should be interpreted as merely exemplary and not limiting, and thus other examples of the exemplary embodiments may have different values.

[0108] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0109] The above-described embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that variations and modifications are possible without departing from the scope of the present invention, and such variations and modifications are fully within the scope of protection of the present invention.

Claims

1. A wheel cutter head design method, characterized in that: include: Obtaining an optimal cutter spacing, where the optimal cutter spacing is the cutter spacing when achieving an optimal rock breaking effect; Obtain the size of the wheel cutter head according to the roadway size; Draw an expanded base map according to the size of the wheel cutter head, wherein the expanded base map is rectangular, the length of the expanded base map is equal to the circumference of the wheel cutter head, and the width of the expanded base map is equal to the thickness of the wheel cutter head; Drawing a first auxiliary line and a second auxiliary line on the expanded base map according to the optimal knife spacing, wherein the first auxiliary lines are parallel to the length direction of the expanded base map and are evenly arranged along the width direction of the expanded base map, and the spacing between two adjacent first auxiliary lines is equal to the optimal knife spacing; the second auxiliary lines are parallel to the width direction of the expanded base map and are evenly arranged along the length direction of the expanded base map, and the spacing between two adjacent second auxiliary lines is equal to four to six times the optimal knife spacing; Arrange the side cutter hob and the main cutter hob according to the first auxiliary line and the second auxiliary line to obtain a hob arrangement plan; The wheel cutter head is designed according to the hob arrangement scheme.

2. The wheel cutter head design method according to claim 1, characterized in that: The step of arranging the side cutter hob and the main cutter hob according to the first auxiliary line and the second auxiliary line comprises: Arranging edge cutters and rollers at intervals at the intersections of the long sides of the unfolded base map and the second auxiliary lines; Designing a spiral line along the intersection of the first auxiliary line and the second auxiliary line, and arranging a spur cutter hob at the intersection of the spiral line and the second auxiliary line; Wherein, the front cutter hob and the side cutter hob are respectively located on different second auxiliary lines.

3. The wheel cutter head design method according to claim 2, characterized in that: The step of designing a spiral line along the intersection of the first auxiliary line and the second auxiliary line comprises: Two spiral lines are designed along the intersection of the first auxiliary line and the second auxiliary line. The two spiral lines are arranged along the width direction of the unfolded base map, and the two spiral lines are parallel to each other.

4. The wheel cutter head design method according to claim 2, characterized in that: The step of designing a spiral line along the intersection of the first auxiliary line and the second auxiliary line comprises: Designing two spiral lines along the intersection of the first auxiliary line and the second auxiliary line, the two spiral lines are arranged along the width direction of the expanded base map, and the two spiral lines are symmetrically arranged about the long axis of the expanded base map; The long axis of the expanded base map is the central axis of the expanded base map parallel to the length direction.

5. The wheel cutter head design method according to claim 2, characterized in that: The step of designing a spiral line along the intersection of the first auxiliary line and the second auxiliary line comprises: A first spiral line and multiple second spiral lines are designed along the intersection of the first auxiliary line and the second auxiliary line, the first spiral line is inclined relative to the first auxiliary line, the second spiral line is inclined relative to the first auxiliary line, and the inclination direction of the second spiral line is opposite to the inclination direction of the first spiral line. The multiple second spiral lines are parallel to each other, and the multiple second spiral lines are arranged along the length direction of the expanded base map and intersect with the first spiral line respectively.

6. The wheel cutter head design method according to any one of claims 1 to 5, characterized in that: There are multiple hob cutter arrangement schemes. After the step of designing the wheel cutter head according to the hob cutter arrangement scheme, the method further includes: Each wheel cutter head is tested separately, and the rock breaking effect, rock breaking force and rock breaking specific energy of each wheel cutter head are compared to determine the optimal arrangement of the cutters and the corresponding wheel cutter head.

7. The wheel cutter head design method according to any one of claims 1 to 5, characterized in that: The step of obtaining the optimal blade spacing comprises: Set up multiple groups of double rollers with different roller spacings, test each group of double rollers separately, compare the rock breaking effect, rock breaking force and rock breaking specific energy of each group of double rollers, and determine the optimal roller spacing.

8. A wheel cutter head, characterized in that: The wheel cutter head is designed by the wheel cutter head design method according to any one of claims 1 to 7; The wheel cutter head includes a cutter head body and a hob. The cutter head body is cylindrical. The hob is arranged on the cylindrical surface of the cutter head body. The hob includes an edge cutter hob and a straight cutter hob. The edge cutter hob is located at both ends of the cylindrical surface along the axial direction, and the straight cutter hob is located in the middle of the cylindrical surface along the axial direction.

9. The wheel cutter head according to claim 8, characterized in that: The outer edge of the hob is provided with a plurality of grooves, which are arranged at intervals along the circumference of the hob, and a rolling angle is formed between two adjacent grooves. The rolling angle is arranged in an arc shape, and the center of the rolling angle coincides with the center of the hob.

10. The wheel cutter head according to claim 9, characterized in that: There are four grooves, which are evenly arranged along the circumference of the hob. The grooves have a first groove wall and a second groove wall that intersect, and the first groove walls of two adjacent grooves are perpendicular to each other. One end of the first groove wall away from the second groove wall coincides with an end of one of the roll angles, and one end of the second groove wall away from the first groove wall coincides with an end of another adjacent roll angle.

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