Hard alloy drilling and milling cutter

Abstract

The utility model discloses a hard alloy drilling and milling cutter, and relates to the related technical field of cutters. The cutter comprises a cutter body, the cutter body comprises a head part and a tail part, the head part comprises a blade part and a connecting part, the connecting part is located between the blade part and the tail part, the diameter of the connecting part is smaller than that of the blade part, the diameter of the blade part is smaller than that of the tail part, and the blade part comprises a drill bit located at the front end and a milling cutter located on the side edge. The edge of the drill bit is provided with two first chip grooves which are centrosymmetric about the axis of the cutter body, the edge of the blade part is provided with two spiral chip grooves which are centrosymmetric about the axis of the cutter body, the edge of one side of each spiral chip groove is provided with a milling cutter, and the spiral chip grooves are partially located on the connecting part. A chip guiding groove is formed in the center of the first chip discharging groove, the upper edge of the chip guiding groove is connected with the blade part to form an arc-shaped face, and the lower edge of the chip guiding groove is connected with the spiral chip discharging groove. The structure improves the chip removal efficiency and avoids chip flying.

Description

Technical Field

[0001] The utility model belongs to the relevant technical field of cutting tools, in particular to a hard alloy drilling and milling cutter. Background Art

[0002] Tools are tools used for cutting in mechanical manufacturing, also known as cutting tools. Drill bits are one of them. Drill bits are used to drill through holes or blind holes in solid materials, and can expand existing holes. Commonly used drill bits include twist drills, flat drills, center drills, deep hole drills and trepanning drills.

[0003] The existing Chinese patent number is 202020585205.1, which discloses a two-edged composite tool for drilling, reaming, milling and chamfering, including a tool body, a tool head is provided at the front end of the tool body, the tool head includes a blade edge, a drill bit, a chamfering edge and a spiral groove, the drill bit is in a cone shape protruding forward, and the edge of the drill bit is provided with two spiral grooves that are centrally symmetrical about the axis of the tool body, and a spiral blade edge is formed between the two spiral grooves, the blade edge includes a milling edge and a reaming edge, the milling edge and the reaming edge are both edge strips protruding outward in a spiral shape, the connection between the milling edge, the reaming edge and the tool body is connected by an arc-shaped bevel, and the connection between the arc-shaped bevel and the tool body forms a chamfering edge, the right end of the milling edge and the reaming edge is connected to the drill bit, and the left end is connected to the chamfering edge, which can directly avoid the tediousness of replacing and debugging the tool, and speed up the production and processing process and shorten the production cycle.

[0004] The above patent is also a prior patent applied by our company. Although it can realize the functions of drilling, reaming and milling at the same time, it still has the following problems: 1. There is no chip groove directly set at the drill bit at the head position, resulting in serious flying chips when drilling from top to top, so it needs to be improved. Utility Model Content

[0005] The utility model aims to provide a cemented carbide drilling and milling cutter, which solves the problem of serious flying chips in the existing cutting tools.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a cemented carbide drill and milling cutter, comprising a tool body, wherein the tool body comprises a head and a tail, the head comprises a blade portion and a connecting portion, the connecting portion is located between the blade portion and the tail, and the diameter of the connecting portion is smaller than the diameter of the blade portion, the diameter of the blade portion is smaller than the diameter of the tail, the blade portion comprises a drill bit located at the front end and a milling cutter located at the side, the drill bit is in a cone shape protruding forward, and the edge of the drill bit is provided with two chip grooves one which are centrally symmetrical about the axis of the tool body, two spiral chip grooves which are centrally symmetrical about the axis of the tool body are provided on the edge of the blade portion, the milling cutter is provided on one side edge of each spiral chip groove, and the spiral chip groove portion is located on the connecting portion, a chip guide groove is provided at the center of the chip groove one, the upper edge of the chip guide groove is connected to the blade portion and forms an arc surface, and the lower edge of the chip guide groove is connected to the spiral chip groove.

[0008] Preferably, in order to further improve chip removal efficiency, the upper edge of the spiral chip groove serves as the bottom edge of chip groove one.

[0009] Preferably, a first trapezoidal connecting platform is provided between the blade portion and the connecting portion, and a second trapezoidal connecting platform is provided between the connecting portion and the tail portion, wherein the angle between the two waists of the first trapezoidal connecting platform is 90 degrees, and the angle between the two waists of the second trapezoidal connecting platform is 90 degrees.

[0010] Preferably, the edge of the tail portion is provided with two second chip grooves which are centrally symmetrical about the axis of the tool body, and the upper edge of the second chip groove serves as the bottom edge of the spiral chip groove.

[0011] Preferably, in order to further realize drilling operations at different angles during the drilling process and ultimately achieve the purpose of rapid drilling, the end face of the drill bit has a total of eight faces, namely the first bevel, the second bevel, the third bevel, the fourth bevel, the fifth bevel, the sixth bevel, the seventh bevel and the eighth bevel, and the first bevel, the second bevel, the third bevel, the fourth bevel and the fifth bevel, the sixth bevel, the seventh bevel and the eighth bevel are centrally symmetrical about the axis of the tool body.

[0012] Preferably, the first slope is connected to the second slope, the fourth slope and the fifth slope respectively, and the third slope is connected between the second slope and the fourth slope, the fifth slope is connected to the first slope, the sixth slope and the eighth slope respectively, and the seventh slope is connected between the sixth slope and the eighth slope, the angle between the fifth slope and the eighth slope is 150 degrees, and the angle between the second slope and the third slope is 130 degrees.

[0013] The utility model has the following beneficial effects: two chip grooves 1 are provided on the edge of the drill bit 201 and are centrally symmetrical about the axis of the tool body 1, and a chip guide groove is provided at the center of the chip groove 1, and the upper edge of the chip guide groove is connected to the blade portion to form an arc-shaped surface. When working, the chips are directly transported to the spiral chip groove through the chip guide groove in the chip groove 1, and are shielded by the two side surfaces of the chip groove 1 to prevent the chips from flying out to both sides, resulting in a serious problem of flying chips. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The overall structure of a cemented carbide drill and milling cutter in Example 1 is shown in FIG. Figure 1 ;

[0015] Figure 2 The overall structure of a cemented carbide drill and milling cutter in Example 1 is shown in FIG. Figure 2 ;

[0016] Figure 3 for Figure 1 A magnified image of point A;

[0017] Figure 4 This is a schematic diagram of the head structure of a cemented carbide drill and milling cutter in Example 1;

[0018] Figure 5 This is a front view of a cemented carbide drill and milling cutter in Example 1.

[0019] Figure markings: tool body 1, head 101, tail 102, blade part 2, connecting part 3, drill bit 201, milling cutter 202, chip groove one 4, spiral chip groove 5, chip guide groove 6, arc surface 7, first trapezoidal connecting platform 8, second trapezoidal connecting platform 9, chip groove two 10, first bevel 2011, second bevel 2012, third bevel 2013, fourth bevel 2014, fifth bevel 2015, sixth bevel 2016, seventh bevel 2017, eighth bevel 2018. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example 1

[0022] See also Figure 1-5As shown, a cemented carbide drill and milling cutter disclosed in this embodiment includes a tool body 1, wherein the tool body 1 includes a head 101 and a tail 102, wherein the head 101 includes a blade portion 2 and a connecting portion 3, wherein the connecting portion 3 is located between the blade portion 2 and the tail 102, and the diameter of the connecting portion 3 is smaller than the diameter of the blade portion 2, and the diameter of the blade portion 2 is smaller than the diameter of the tail 102, wherein the blade portion 2 includes a drill bit 201 located at the front end and a milling cutter 202 located at the side, wherein the drill bit 201 is in a cone shape protruding forward, and the edge of the drill bit 201 is provided with two grooves about the tool The main body 1 has a chip groove 4 which is centrally symmetrical about the axis of the tool body 1, and two spiral chip grooves 5 which are centrally symmetrical about the axis of the tool body 1 are provided on the edge of the blade portion 2. The milling cutter 202 is provided on one side edge of each spiral chip groove 5, and the spiral chip groove 5 is partially located on the connecting portion 3. A chip guide groove 6 is provided at the center of the chip groove 4, and the upper edge of the chip guide groove 6 is connected to the blade portion 2 and forms an arc surface 7, and the lower edge of the chip guide groove 6 is connected to the spiral chip groove 5 to further improve the chip removal efficiency. The upper edge of the spiral chip groove 5 serves as the bottom edge of the chip groove 4.

[0023] Preferably, a first trapezoidal connecting platform 8 is provided between the blade portion 2 and the connecting portion 3, and a second trapezoidal connecting platform 9 is provided between the connecting portion 3 and the tail portion 102, wherein the angle between the two waists of the first trapezoidal connecting platform 8 is 90 degrees, and the angle between the two waists of the second trapezoidal connecting platform 9 is 90 degrees.

[0024] Preferably, the edge of the tail portion 102 is provided with two chip grooves 10 which are centrally symmetrical about the axis of the tool body 1, and the upper edge of the chip groove 10 serves as the bottom edge of the spiral chip groove 5. By further adding the chip groove 10, the chips flowing from the spiral chip groove 5 are further guided through the chip groove 10, thereby further ensuring the guiding and chip removal effect of the chips.

[0025] Preferably, in order to further realize drilling operations at different angles during the drilling process and ultimately achieve the purpose of rapid drilling, the end face of the drill bit 201 has a total of eight surfaces, namely the first bevel 2011, the second bevel 2012, the third bevel 2013, the fourth bevel 2014, the fifth bevel 2015, the sixth bevel 2016, the seventh bevel 2017 and the eighth bevel 2018, and the first bevel 2011, the second bevel 2012, the third bevel 2013, the fourth bevel 2014 and the fifth bevel 2015, the sixth bevel 2016, the seventh bevel 2017, and the eighth bevel 2018 are centrally symmetrical about the axis of the tool body 1.

[0026] Preferably, the first slope 2011 is connected to the second slope 2012, the fourth slope 2014 and the fifth slope 2015 respectively, and the third slope 2013 is connected between the second slope 2012 and the fourth slope 2014, the fifth slope 2015 is connected to the first slope 2011, the sixth slope 2016 and the eighth slope 2018 respectively, and the seventh slope 2017 is connected between the sixth slope 2016 and the eighth slope 2018, the angle between the fifth slope 2015 and the eighth slope 2018 is 150 degrees, and the angle between the second slope 2012 and the third slope 2013 is 130 degrees.

[0027] In this structure, two chip grooves 4 are provided on the edge of the drill bit 201, which are centrally symmetrical about the axis of the tool body 1. At the same time, a chip guide groove 6 is provided in the center of the chip groove 4. The upper edge of the chip guide groove 6 is connected to the blade portion 2 to form an arc surface 7. When working, the chips are directly transported to the spiral chip groove 5 through the chip guide groove 6 in the chip groove 4, and are shielded by the two side surfaces of the chip groove 4 to prevent the chips from flying out to both sides and causing serious flying chips.

[0028] The working process of this structure is as follows: the tool rotates clockwise and feeds longitudinally on the workpiece to be processed, the drill bit 201 at the front end of the tool body 1 first drills a certain hole on the workpiece to be processed, and then cooperates with the milling edge 211 on the side to drill a hole of a certain depth. In addition, since the head of this structure is provided with eight tool bevels, drilling operations can be performed at different angles during the drilling process, which can improve product processing efficiency. Moreover, since two inclined milling cutters 202 are used, milling operations can be performed on waist-shaped holes. Therefore, the accessibility and flexibility of this tool are strong.

[0029] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. A cemented carbide drilling and milling cutter, comprising a cutter body (1), wherein the cutter body (1) comprises a head (101) and a tail (102), wherein: The head (101) comprises a blade portion (2) and a connecting portion (3), wherein the connecting portion (3) is located between the blade portion (2) and the tail portion (102), and the diameter of the connecting portion (3) is smaller than the diameter of the blade portion (2), and the diameter of the blade portion (2) is smaller than the diameter of the tail portion (102), wherein the blade portion (2) comprises a drill bit (201) located at the front end and a milling cutter (202) located at the side, wherein the drill bit (201) is in a cone shape protruding forward, and the edge of the drill bit (201) is provided with two radially extending grooves extending in a direction parallel to the axis of the tool body (1). A centrally symmetrical chip groove (4) is provided, and two spiral chip grooves (5) are provided on the edge of the blade portion (2) and are centrally symmetrical about the axis of the tool body (1). The milling cutter (202) is provided on one side edge of each spiral chip groove (5), and the spiral chip groove (5) is partially located on the connecting portion (3). A chip guide groove (6) is provided at the center of the chip groove (4), the upper edge of the chip guide groove (6) is connected to the blade portion (2) and forms an arc surface (7), and the lower edge of the chip guide groove (6) is connected to the spiral chip groove (5).

2. A cemented carbide drilling and milling cutter according to claim 1, characterized in that: The upper edge of the spiral chip groove (5) serves as the bottom edge of the chip groove one (4).

3. A cemented carbide drilling and milling cutter according to claim 1, characterized in that: A first trapezoidal connecting platform (8) is provided between the blade portion (2) and the connecting portion (3), and a second trapezoidal connecting platform (9) is provided between the connecting portion (3) and the tail portion (102); the angle between the two waists of the first trapezoidal connecting platform (8) is 90 degrees, and the angle between the two waists of the second trapezoidal connecting platform (9) is 90 degrees.

4. A cemented carbide drilling and milling cutter according to claim 1 or 2, characterized in that: The edge of the tail portion (102) is provided with two second chip removal grooves (10) which are centrally symmetrical about the axis of the tool body (1), and the upper edge of the second chip removal groove (10) serves as the bottom edge of the spiral chip removal groove (5).

5. A cemented carbide drilling and milling cutter according to claim 1, 2 or 3, characterized in that: The end face of the drill bit (201) has eight faces in total, namely a first bevel (2011), a second bevel (2012), a third bevel (2013), a fourth bevel (2014), a fifth bevel (2015), a sixth bevel (2016), a seventh bevel (2017) and an eighth bevel (2018), and the first bevel (2011), the second bevel (2012), the third bevel (2013), the fourth bevel (2014) and the fifth bevel (2015), the sixth bevel (2016), the seventh bevel (2017) and the eighth bevel (2018) are centrally symmetrical about the axis of the tool body (1).

6. A cemented carbide drilling and milling cutter according to claim 5, characterized in that: The first inclined plane (2011) is respectively connected to the second inclined plane (2012), the fourth inclined plane (2014), and the fifth inclined plane (2015), and the third inclined plane (2013) is connected between the second inclined plane (2012) and the fourth inclined plane (2014), the fifth inclined plane (2015) is respectively connected to the first inclined plane (2011), the sixth inclined plane (2016), and the eighth inclined plane (2018), and the seventh inclined plane (2017) is connected between the sixth inclined plane (2016) and the eighth inclined plane (2018), the included angle between the fifth inclined plane (2015) and the eighth inclined plane (2018) is 150 degrees, and the included angle between the second inclined plane (2012) and the third inclined plane (2013) is 130 degrees.

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