A milling cutter structure

Abstract

A milling cutter structure includes a main cutter shaft, on which are detachably mounted several cutting edges. The main cutter shaft is provided with a first spiral design line, which spirally extends around the outer surface of the main cutter shaft to the end. Several cutting edges are spaced apart along the first spiral design line around the circumference of the main cutter shaft. The cross-section of the cutting edge is shuttle-shaped, and the cross-sectional area of ​​the cutting edge gradually decreases as it moves away from the main cutter shaft. The upper surface of each cutting edge is formed with a cutting edge, and the two adjacent cutting edges extend along the first spiral design line. The cutting edges on adjacent parallel first spiral design line segments are staggered. The present invention can reduce the problem of debris clogging the machining groove and affecting the machining groove forming quality when the milling cutter is machining a workpiece.

Description

Technical Field

[0001] This invention belongs to the technical field of milling cutters, and specifically relates to a milling cutter structure. Background Technology

[0002] Milling cutters, as a commonly used cutting tool, are widely used in the machining of various metallic and non-metallic materials. However, the chip clogging problem generated by milling cutters during machining has a serious negative impact on machining efficiency, machining quality, and tool life.

[0003] The chip evacuation grooves on end mills are mostly straight grooves or ordinary spiral grooves. In straight grooves, the chips lack sufficient guidance and constraint during chip removal, easily accumulating within the groove. This is especially problematic when machining complex shapes or performing deep hole machining, where the chip removal path is obstructed, preventing timely chip discharge and leading to blockage. While ordinary spiral grooves improve chip removal directionality to some extent, their design, including the helix angle and groove width, still results in less than smooth chip flow within the groove. This is particularly true when chips are long and wide, easily entangled and compressed, ultimately causing blockage of the chip removal channel. Summary of the Invention

[0004] This invention provides a milling cutter structure to solve the problem of easy clogging of milling cutters by chips generated during machining.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] On one hand, this application discloses a milling cutter structure, including a main cutter spindle, on which a plurality of cutting edges are detachably mounted. The main cutter spindle is designed with a first helical design line, which extends helically around the outer surface of the main cutter spindle to the end. The plurality of cutting edges are arranged at intervals along the first helical design line on the periphery of the main cutter spindle. The cross-section of the cutting edge is spindle-shaped, and the cross-sectional area of ​​the cutting edge gradually decreases in the direction gradually away from the main cutter spindle.

[0007] Each of the cutting edges has a cutting ridge formed on its upper surface. The two adjacent cutting ridges extend along the first spiral design line, and the cutting edges on adjacent parallel segments of the first spiral design line are staggered.

[0008] Furthermore, a second spiral design line is provided, which is symmetrically arranged with the first spiral design line along the central axis of the main cutter shaft. The main cutter shaft forms a mounting ridge along the trajectory of the second spiral design line, and the cutting edge is detachably mounted on the mounting ridge.

[0009] Furthermore, the mounting ridge has recessed mounting grooves at intervals, the cutting edge portion is engaged in the mounting grooves, and the cutting ridge is detachably connected to the mounting ridge. At the same time, the extension direction of the cutting ridge intersects with the extension direction of the second spiral design line.

[0010] Furthermore, the cutting edge includes a main body and a connecting portion for insertion into the mounting groove;

[0011] The sidewall of the mounting ridge is also formed with a connecting protrusion, and a connecting bolt is provided between the connecting part and the connecting protrusion.

[0012] Furthermore, the cutting edges of adjacent layers that are staggered from each other have overlapping sections along the direction of the first helical design line.

[0013] Furthermore, the mounting ridge also includes a bottom cutting edge located at the end, the bottom cutting edge being located on the end face of the main cutter shaft, and the bending direction of the bottom cutting edge being consistent with the tilting direction of the cutting edge, the thickness of the bottom cutting edge being greater than the thickness of the mounting ridge.

[0014] Furthermore, a rinsing channel is formed inside the main cutter shaft. The rinsing channel includes a spiral segment and several branch segments. The spiral segment is arranged along the rotation direction of the first spiral design line. One end of each branch segment is connected to the spiral segment, and the other end extends out from the surface of the main cutter shaft.

[0015] Furthermore, the surface of the main cutter shaft is provided with sieve holes, and the branch section communicates with the sieve holes.

[0016] Furthermore, the rinsing channel also includes a water supply ring channel, which is connected to the inlet end of the spiral section, and a water supply structure for introducing pressurized liquid into the water supply ring channel is also provided outside the main cutter shaft.

[0017] Furthermore, the water supply structure includes a fixed ring sleeved on the outside of the main cutter shaft, and a rotating collar rotatably sleeved on the outside of the fixed ring;

[0018] The fixed ring has an annular channel that is connected to the water supply ring. The rotating collar has a water injection channel, one end of which is connected to the water supply ring and the other end is used to connect to the water supply source.

[0019] The present invention can achieve the following beneficial effects:

[0020] 1. This application has multiple cutting edges arranged in a spiral pattern on the surface of the milling cutter structure. Each cutting edge has a cutting ridge on its upper surface. The cutting ridge is used to achieve cutting, grooving and polishing. The multiple cutting edges are staggered, so that the chips generated during the cutting process are shorter, which makes it easier for the chips to be discharged along the gap between the cutting edges.

[0021] 2. This application has a mounting ridge formed on the main cutter shaft along the second helical design line, and the second helical design line and the first helical design line are symmetrically arranged, which makes the cutting edge mounted on the mounting ridge more stable under force during cutting and less prone to deviation and shaking; in addition, it makes the cutting edge detachable and easy to replace, thereby extending the service life of the milling cutter structure of this application.

[0022] 3. A rinsing channel is formed inside the main cutter shaft. Pressurized water is poured into the rinsing channel so that the milling cutter structure can spray the water in the rinsing channel toward the surface of the main cutter shaft during rotation, thereby washing away the debris and cleaning the surface of the main cutter shaft. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0024] Figure 1 This is a planar rendering of a milling cutter structure according to the present invention;

[0025] Figure 2 This is a schematic diagram illustrating the arrangement of the first and second spiral design lines according to the present invention.

[0026] Figure 3 This is a partial structural diagram illustrating the mounting groove on the mounting ridge, as used in this invention.

[0027] Figure 4 This is a partial schematic diagram showing the effect of the cutting edge of the present invention after it has been installed onto the mounting edge;

[0028] Figure 5 For along Figure 4 A schematic diagram of a partial cross-section after being cut along section line 1-1;

[0029] Figure 6 For along Figure 4 A schematic diagram of a partial cross-section after being cut along section line 2-2;

[0030] Figure 7 This is a vertical cross-sectional schematic diagram illustrating the blowing and rinsing channel of the present invention;

[0031] Figure 8 yes Figure 7 Enlarged view of point A in the middle.

[0032] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0033] 1. Main cutter shaft; 11. Bottom cutting edge; 12. Screen hole; 13. Limiting groove; 2. Cutting edge; 21. Cutting ridge; 22. Main body; 23. Connecting part; 24. Fixing part; 3. First spiral design line; 4. Second spiral design line; 5. Mounting ridge; 51. Mounting groove; 52. Connecting protrusion; 6. Blowing channel; 61. Spiral section; 62. Branch section; 63. Water supply ring channel; 7. Water supply structure; 71. Fixing ring; 711. Annular channel; 72. Rotating collar; 721. Water injection channel; 8. Connecting bolt. Detailed Implementation

[0034] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0035] like Figure 1 As shown, a milling cutter structure includes a main cutter spindle 1, which is cylindrical. Several cutting edges 2 are detachably mounted on the main cutter spindle 1, and the milling cutter structure can perform machining on the workpiece through the several cutting edges 2.

[0036] When designing the structure of a milling cutter, such as Figure 2 The design includes a first spiral design line 3 and a second spiral design line 4. Both the first spiral design line 3 and the second spiral design line 4 are arranged around the surface of the main cutter shaft 1, and their extension directions are symmetrical along the central axis of the main cutter shaft 1. It should be noted that the first spiral design line 3 and the second spiral design line 4 are virtual design lines, not solid structures.

[0037] The main cutter shaft 1 has a mounting ridge 5 formed along the trajectory of the second spiral design line 4. The mounting ridge 5 is integrally formed with the main cutter shaft 1 and protrudes from the surface of the main cutter shaft 1. In one specific embodiment, the cross-section of the mounting ridge 5 is quadrilateral, and the thickness of the area in contact with the main cutter shaft 1 is greater than the thickness of the top of the mounting ridge 5.

[0038] Several cutting edges 2 are arranged at intervals along the trajectory of the first helical design line 3, and the cutting edges 2 are detachably mounted on the mounting ridge 5. The cross-section of the cutting edge 2 is spindle-shaped, and the cross-sectional area of ​​the cutting edge 2 gradually decreases in the direction away from the main tool axis 1, thus forming an arc-shaped surface on the surface of the cutting edge 2. A cutting ridge 21 is formed on the upper surface of the cutting edge 2, and the cutting ridge 21 is integrally formed with the cutting edge 2. The extension direction of the cutting ridge 21 can be curved. In a preferred embodiment, any two adjacent cutting ridges 21 are located on the first helical design line 3, thereby ensuring that all cutting ridges 21 extend along the first helical design line 3, thus improving the cutting effect of the cutting ridges 21. It should be noted that regardless of the curved shape of the upper surface of the cutting edge 2, the thickness of the cutting edge 21 is adaptively adjusted so that all points on the upper surface of the cutting edge 21 are on the same cylindrical surface, thereby enabling the cutting edge 21 to perform the machining and cutting action on the workpiece. In addition, the thickness of the cutting edge 21 near the cutting edge 2 is greater than the thickness of the surface of the cutting edge 21. This design ensures that the cutting edge 21 has better installation stability while maintaining cutting strength.

[0039] The cutting edges 2 on adjacent parallel segments of the first spiral design line 3 are staggered, and the cutting edges 21 of adjacent layers that are staggered have overlapping segments along the direction of the first spiral design line 3, that is, as shown in the figure. Figure 1 As shown, there is an overlapping section of S1 between the cutting edges 21 of adjacent layers that are staggered from each other. This design makes the cutting surface smoother and less prone to blind spots when machining the workpiece using the cutting edge 2.

[0040] Specifically, such as Figures 3 to 5 As shown, mounting grooves 51 are formed by recesses on the mounting ridge 5 at intervals. The cutting edge 2 includes a main body 22 and a connecting part 23 for insertion into the mounting groove 51. When installing the cutting edge 2, the connecting part 23 is snapped into the mounting groove 51, and then the cutting edge 2 is fixed to the mounting ridge 5 using the connecting bolts 8. It should be noted that after the cutting edge 2 is installed on the mounting ridge 5, the cutting edge 21 protrudes from the upper surface of the mounting ridge 5, and the extension direction of the cutting edge 21 intersects with the extension direction of the second helical design line 4.

[0041] Specifically, such as Figures 3 to 5 As shown, the mounting ridge 5 has connecting protrusions 52 formed on the sidewalls surrounding the mounting groove 51. Two connecting protrusions 52 are provided, each protruding from one of the two sidewalls of the mounting ridge 5. The surface of the connecting protrusions 52 is parallel to the normal of the second spiral design line 4 at the mounting groove 51. The connecting portion 23 at the bottom of the cutting edge 2 is designed to match the mounting groove 51, and the area where the bottom wall of the cutting edge 2 contacts the surface of the main shaft 1 is adaptively formed with a curved surface that conforms to the surface of the main shaft 1 to improve the installation stability of the cutting edge 2.

[0042] In another preferred embodiment, such as Figure 6 As shown, a limiting groove 13 is also formed on the surface of the main cutter spindle 1, and a fixing part 24 matching the shape of the limiting groove 13 is formed on the bottom wall of the cutting edge 2. When installing the cutting edge 2, after the connecting part 23 is inserted into the mounting groove 51, the fixing part 24 is correspondingly fitted into the limiting groove 13. In addition, multiple high-strength connecting bolts are screwed into the side wall of the cutting edge 2. The high-strength connecting bolts are threadedly connected to both the cutting edge 2 and the main cutter spindle 1, thereby further fixing the cutting edge 2 and the main cutter spindle 1.

[0043] This application's milling cutter structure utilizes the cutting edge 2 to achieve the milling function, replacing the design concept of slotting the milling cutter surface for chip removal. The spiral arrangement of the cutting edge 2 allows the milling cutter structure to perform normal cutting and machining. Furthermore, the individual cutting edges 2 are mounted on the main cutter spindle 1 at intervals, with adjacent layers of cutting edges 2 staggered. This results in shorter and more easily broken chips when machining workpieces using this milling cutter structure, reducing the problem of long, tangled chips affecting machining quality. Shorter chips also facilitate chip removal. The gaps between the cutting edges 2 allow chips to exit along these gaps, reducing chip accumulation.

[0044] The cutting edge 2 is designed in a spindle shape, which increases the contact area between the cutting edge 2 and the main cutter shaft 1, enabling it to withstand greater impact forces. The surface area gradually decreases, allowing the cutting edge 21 to achieve more precise cutting. The first helical design line 3 and the second helical design line 4 are symmetrically arranged, and the mounting edge 5 extends along the second helical design line 4. The cutting edge 2 is arranged along the first helical design line 3. When the cutting edge 2 is installed on the mounting edge 5, and the main cutter shaft 1 drives the cutting edge 2 to rotate and cut, the extension direction of the cutting edge 2 and the extension direction of the mounting edge 5 intersect, making the force on the cutting edge 2 perpendicular to the surface of the connecting protrusion 52. This optimizes the support force of the connecting protrusion 52 on the cutting edge 2, allowing the connecting protrusion 52 to better support the cutting edge 2 and enhance the cutting edge 2's ability to resist external resistance.

[0045] like Figure 1As shown, the mounting edge 5 also includes a bottom cutting edge 11 located at its end. The bottom cutting edge 11 and the mounting edge 5 are integrally machined, and the bottom cutting edge 11 is located on the end face of the main cutter shaft 1. The bottom cutting edge 11 first contacts the workpiece to be machined to achieve cutting of the workpiece. The bottom cutting edge 11 has a curvature consistent with the inclination direction of the cutting edge 21, and the thickness of the bottom cutting edge 11 is greater than the thickness of the mounting edge 5. By reasonably setting the thickness of the bottom cutting edge 11, the upper surface of the bottom cutting edge 11 and the upper surface of the cutting edge 21 can be on the same cylindrical surface, thereby achieving cutting of the workpiece to be machined through the bottom cutting edge 11 and the cutting edge 21. In specific machining, multiple bottom cutting edges 11 arranged circumferentially around the main cutter shaft 1 first cut the workpiece to be machined, and then the cutting edge 2 contacts the surface of the workpiece to achieve further cutting and grinding. Because the bottom cutting edge 11 and the cutting edge 2 are staggered, the chips generated during the cutting process are less likely to be spiral or long strip-shaped, and therefore less likely to entangle or be squeezed, affecting the machining quality of the workpiece to be machined. Since the bottom edge 11 and the cutting edge 2 are in contact with the workpiece for a long time, they are easily damaged. If the bottom edge 11 is worn, the cutting edge 2 can be completely removed and only the main cutter spindle 1 needs to be replaced. If a single cutting edge 2 is worn or damaged, the single cutting edge 2 can be disassembled and replaced, thereby reducing the maintenance and replacement cost of the milling cutter structure of this application.

[0046] like Figure 7 and Figure 8 As shown, a cleaning channel 6 is also provided inside the main cutter shaft 1. The cleaning channel 6 includes a water supply ring channel 63, a spiral section 61, and several branch sections 62 connected in sequence. The cleaning channel 6 enables the spraying of liquid onto the surface of the main cutter shaft 1. Specifically, the water supply ring channel 63 is arranged around the side wall of the main cutter shaft 1; the spiral section 61 is arranged along the rotation direction of the first spiral design line 3; several branch sections 62 are evenly arranged and connected along the spiral section 61, extending inside the main cutter shaft 1 and passing through the side wall of the main cutter shaft 1, and the branch sections 62 are inclined towards the side closer to the bottom cutting edge 11. In actual processing, the main cutter shaft 1 can be produced using 3D printing technology, thereby enabling the fine machining of the cleaning channel 6.

[0047] Specifically, a water supply structure 7 is provided outside the main cutter shaft 1. The water supply structure 7 includes a fixed ring 71 and a rotating collar 72. The fixed ring 71 is fixedly installed outside the main cutter shaft 1, and the rotating collar 72 is rotatably connected to the fixed ring 71. An annular channel 711 is formed inside the fixed ring 71, which is connected to the water supply ring channel 63. A water injection channel 721 is formed on the rotating collar 72. One end of the water injection channel 721 is connected to the water supply ring channel 63, and the other end is connected to a water source. Liquid can be injected into the water injection channel 721 under pressure, allowing the liquid to enter the water supply ring channel 63 and then flow into the spiral section 61. It should be noted that a sealing structure is provided between the fixed ring 71 and the rotating collar 72 to achieve a seal and reduce liquid leakage.

[0048] When the milling cutter rotates, the liquid flows and rotates along the spiral section 61. Under the action of centrifugal force, it can be thrown out of the main cutter shaft 1 through the branch section 62. Several sieve holes 12 are provided on the surface of the main cutter shaft 1, and each branch section 62 is connected to multiple sieve holes 12. The sieve holes 12 can disperse the liquid in the branch section 62 into a water mist, thereby reducing the accumulation of large water molecules on the milling cutter's machining surface and the impact on machining accuracy. It should be noted that the branch section 62 can pass through the surface of the main cutter shaft 1 or the surface of the mounting ridge 5, but the area where the branch section 62 passes through is offset from the area covered by the cutting edge 2.

[0049] The blow-wash channel 6 is set in the main cutter spindle 1 to wash away the fine debris on the surface of the milling cutter structure; it can also wet the surface of the milling cutter structure to achieve lubrication; since the friction between the milling cutter structure and the workpiece surface generates a lot of heat, the sprayed water mist can also cool down the temperature, reducing the occurrence of material softening or deformation due to temperature rise during the processing of some special materials.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A milling cutter structure, characterized in that: Includes a main cutting shaft (1), on which a plurality of cutting edges (2) are detachably mounted. The main cutting shaft (1) is designed with a first spiral design line (3), which extends spirally around the outer surface of the main cutting shaft (1) to the end. The plurality of cutting edges (2) are arranged at intervals along the first spiral design line (3) on the periphery of the main cutting shaft (1). The cross-section of the cutting edge (2) is spindle-shaped, and the cross-sectional area of ​​the cutting edge (2) gradually decreases in the direction that gradually moves away from the main cutting shaft (1). Each of the cutting edges (2) has a cutting edge (21) formed on its upper surface. The two cutting edges (21) that are adjacent to each other extend along the first spiral design line (3). The cutting edges (2) on adjacent segments parallel to the first spiral design line (3) are staggered. A second spiral design line (4) is also provided. The second spiral design line (4) and the first spiral design line (3) are symmetrically arranged along the central axis of the main cutter shaft (1). The main cutter shaft (1) forms an installation ridge (5) along the trajectory of the second spiral design line (4). The cutting edge (2) is detachably installed on the installation ridge (5). The mounting ridge (5) has recessed grooves (51) at intervals, the cutting edge (2) is partially engaged in the mounting groove (51), and the cutting ridge (21) is detachably connected to the mounting ridge (5). At the same time, the extension direction of the cutting ridge (21) intersects with the extension direction of the second spiral design line (4). The cutting edge (2) includes a main body (22) and a connecting part (23) for insertion into the mounting groove (51); The sidewall of the mounting ridge (5) is also formed with a connecting protrusion (52), and a connecting bolt (8) is provided between the connecting part (23) and the connecting protrusion (52).

2. The milling cutter structure according to claim 1, characterized in that: The cutting edges (21) of adjacent layers are staggered and have overlapping sections along the direction of the first spiral design line (3).

3. The milling cutter structure according to claim 1, characterized in that: The mounting ridge (5) also includes a bottom cutting edge (11) located at the end. The bottom cutting edge (11) is located on the end face of the main cutter shaft (1), and the bending direction of the bottom cutting edge (11) is consistent with the tilting direction of the cutting edge (2). The thickness of the bottom cutting edge (11) is greater than the thickness of the mounting ridge (5).

4. The milling cutter structure according to claim 1, characterized in that: The main cutter shaft (1) has a blow-wash channel (6) inside. The blow-wash channel (6) includes a spiral section (61) and several branch sections (62). The spiral section (61) is arranged along the rotation direction of the first spiral design line (3). One end of the branch section (62) is connected to the spiral section (61), and the other end protrudes from the surface of the main cutter shaft (1).

5. A milling cutter structure according to claim 4, characterized in that: The main cutter shaft (1) has a sieve hole (12) on its surface, and the branch section (62) is connected to the sieve hole (12).

6. A milling cutter structure according to claim 4, characterized in that: The rinsing channel (6) also includes a water supply ring channel (63), which is connected to the inlet end of the spiral section (61), and a water supply structure (7) for introducing pressurized liquid into the water supply ring channel (63) is also provided outside the main cutter shaft (1).

7. A milling cutter structure according to claim 6, characterized in that: The water supply structure (7) includes a fixed ring (71) sleeved on the outside of the main cutter shaft (1) and a rotating collar (72) rotatably sleeved on the outside of the fixed ring (71). The fixed ring (71) has an annular channel (711) that is connected to the water supply ring (63). The rotating collar (72) has a water injection channel (721) that is connected to the water supply ring (63) at one end and connected to the water supply source at the other end.

Images