Compound tool

Abstract

The utility model discloses a compound cutter, relates to mechanical cutting machining technical field, compound cutter includes: cutter bar, first cutterhead and second cutterhead, the first cutterhead is detachably cup joint with the cutter bar, the first cutterhead is provided with a plurality of first blades, the cutting edge of first blade faces the first direction; the second cutter head is detachably connected to the cutter bar in a sleeving mode, the second cutter head and the first cutter head are arranged in a mirror image mode, the second cutter head is provided with a plurality of second blades, the cutting edges of the second blades face the second direction, and the first direction is opposite to the second direction. According to the compound cutter, the first cutter head and the second cutter head which are detachable are arranged, and the first cutting edge of the first cutter head and the second cutting edge of the second cutter head face the opposite directions, so that when the compound cutter is used, the placement positions of the cutter heads can be changed according to the rotating direction of the cutter bar, and therefore the directions of the cutting edges are changed, and the universality of the compound cutter is improved; the cutting efficiency of the compound tool is improved.

Description

Technical Field

[0001] This utility model relates to the field of mechanical cutting technology, and in particular to a composite cutting tool. Background Technology

[0002] The machining of metal parts requires cutting tools, which are mounted in machine tools for rotary cutting. Related technologies classify cutting tools into two machining methods: forward rotary and reverse rotary. Conventional tools cannot be used for both methods; different rotary machining methods require different tools, thus increasing machining costs. Utility Model Content

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, one objective of this invention is to provide a composite tool with a first cutter head and a second cutter head, wherein the first and second cutter heads are detachably connected to the tool holder, which can improve application flexibility and thus reduce usage costs.

[0004] The composite cutting tool according to an embodiment of the present invention includes: a tool holder, a first cutting disc, and a second cutting disc. The first cutting disc is detachably sleeved on the tool holder and is provided with a plurality of first blades, the cutting edges of which face a first direction. The tool holder is detachably sleeved on the tool holder and arranged in a mirror image of the first cutting disc. The second cutting disc is provided with a plurality of second blades, the cutting edges of which face a second direction, the first direction and the second direction being opposite.

[0005] According to the embodiments of the present invention, the composite tool is provided with a first cutting disc and a second cutting disc detachably connected to the tool holder, and the first cutting edge of the first cutting disc and the second cutting edge of the second cutting disc face opposite directions. In application, the placement position of the cutting disc can be changed according to the rotation direction of the tool holder, thereby changing the orientation of the cutting edge, improving the versatility of the composite tool, and also increasing the cutting efficiency of the composite tool.

[0006] In addition, the composite cutting tool according to the above embodiments of this utility model may also have the following additional technical features:

[0007] In some examples of this utility model, the cutter head has a connecting end face and a cutting end face, the cutting blade is disposed on the cutting end face, the connecting end face of the first cutter head faces the connecting end face of the second cutter head, the cutting end face of the first cutter head is disposed on the side away from the second cutter head, and the cutting end face of the second cutter head is disposed on the side away from the first cutter head.

[0008] In some examples of this utility model, the connecting end face of the first cutter head is provided with a first platform, and the connecting end face of the second cutter head is provided with a second platform. The first platform abuts against the second platform to separate the cutting end faces of the first cutter head and the second cutter head.

[0009] In some examples of this invention, the thickness of the second platform is greater than the thickness of the first platform.

[0010] In some examples of this invention, the thickness of the first platform is greater than the thickness of the second platform.

[0011] In some examples of this utility model, the tool holder includes a main body, a positioning part, and a connecting part connected along the axial direction. The diameter of the positioning part is larger than the diameter of the connecting part. The first cutter disc and the second cutter disc are sleeved on the connecting part. One of the first cutter disc and the second cutter disc abuts against the positioning part along the axial direction, and the other is connected to the connecting part by a fastener.

[0012] In some examples of this utility model, the tool holder includes a positioning part and a connecting part, the diameter of the positioning part is larger than the diameter of the connecting part, the first tool disc and the second tool disc are sleeved on the connecting part and fixedly connected by a fixing member; the cutting end face of the first tool disc is provided with a third platform, the cutting end face of the second tool disc is provided with a fourth platform, one of the third platform and the fourth platform abuts against the positioning part, and the other abuts against the fixing member.

[0013] In some examples of this utility model, the cutter bar is provided with a radially protruding limiting member, the first cutter disc has a first through hole, a first groove is provided in the first through hole, the cutter bar passes through the first through hole and at least a portion of the limiting member extends into the first groove; the second cutter disc has a second through hole, a second groove is provided in the second through hole, the cutter bar passes through the second through hole and at least a portion of the limiting member extends into the second groove.

[0014] In some examples of this utility model, the composite cutting tool further includes an adjusting pad, which is disposed between the first cutting disc and the second cutting disc, and is used to adjust the distance between the first cutting disc and the second cutting disc; the cutting bar is provided with a radially protruding limiting member, the adjusting pad has a third through hole, the third through hole is provided with a third groove, the cutting bar passes through the third through hole and at least a portion of the limiting member extends into the third groove.

[0015] In some examples of this utility model, the diameter of the cutter head is D, the thickness of the blade is S, and the number of blades is Z, satisfying πD / 4S≥Z≥πD / 8S.

[0016] In some examples of this utility model, the thickness of the blade is S, and the distance between the two blades is H, satisfying 4S≥H≥8S.

[0017] In some examples of this utility model, the periphery of the cutting end face is provided with a plurality of spaced mounting grooves and clearance grooves, the clearance grooves are connected to the mounting grooves, at least a portion of the plurality of blades extend into the mounting grooves, and the cutting edges of the blades face the clearance grooves.

[0018] In some examples of this utility model, the composite cutting tool further includes a fastener, one end of which abuts against the blade and the other end of which is mounted in the clearance groove.

[0019] In some examples of this utility model, the blade includes a first end face, a second end face, and a side face, the side face connecting the first end face and the second end face, and the cross-sectional area of ​​the second end face is larger than the cross-sectional area of ​​the first end face in the thickness direction projection, and the cutting edge is disposed on the second end face. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the composite tool structure in some embodiments of this utility model;

[0021] Figure 2 This is an assembly drawing of the composite cutting tool in some embodiments of this utility model;

[0022] Figure 3 This is an assembly drawing of the composite cutting tool in some embodiments of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the first cutter head in some embodiments of this utility model (showing the cutting end face);

[0024] Figure 5 This is a schematic diagram of the structure of the first cutter head in some embodiments of the present invention (showing the connecting end face and the first platform);

[0025] Figure 6 This is a schematic diagram of the structure of the second cutter head in some embodiments of this utility model (showing the cutting end face);

[0026] Figure 7 This is a schematic diagram of the structure of the second cutter head in some embodiments of the present invention (showing the connecting end face and the second platform);

[0027] Figure 8 This is a schematic diagram of the structure of the adjusting pad in some embodiments of this utility model;

[0028] Figure 9 This is a schematic diagram of the blade structure in some embodiments of this utility model;

[0029] Figure 10 This is a schematic diagram of the composite tool in some other embodiments of the present invention (showing a composite tool without an adjustment pad).

[0030] Figure label:

[0031] 100. Composite cutting tool; 10. Tool holder; 11. Main body; 12. Positioning part; 13. Connecting part; 103. Limiting groove; 131. Limiting component; 21. First cutting disc; 211. First cutting tool; 212. First platform; 213. Third platform; 201. First through hole; 202. First groove; 22. Second cutting disc; 221. Second cutting tool; 222. Second platform; 224. Fourth platform; 203. Second through hole; 204. Second groove; 20a. Connecting end face; 20b. Cutting end face; 205. Mounting groove; 206. Clearance groove; 20c. Cutting tool; 210. First end face; 220. Second end face; 230. Side side; 30. Adjusting pad; 301. Third through hole; 302. Third groove; 41. Fastener; 42. Fixing component; 200. Workpiece. Detailed Implementation

[0032] The lower end face describes embodiments of the present invention in detail. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0033] Combination Figures 1 to 3 The composite cutting tool 100 according to an embodiment of the present invention includes: a tool holder 10, a first cutting disc 21, and a second cutting disc 22. The first cutting disc 21 is detachably sleeved on the tool holder 10 and is provided with a plurality of first cutting blades 211. The second cutting disc 22 is detachably sleeved on the tool holder 10 and is provided with a plurality of second cutting blades 221. Specifically, the first cutting disc 21 and the second cutting disc 22 are sleeved on the tool holder 10. When the tool holder 10 rotates along the rotation center axis, it can drive the first cutting disc 21 and the second cutting disc 22 to rotate, thereby driving the first cutting blades 211 and the second cutting blades 221 to rotate and produce a cutting effect.

[0034] More specifically, the cutting edge of the first blade 211 faces a first direction, and the cutting edge of the second blade 221 faces a second direction, with the first and second directions being opposite. The second cutter head 22 is arranged in a mirror image of the first cutter head 21. Thus, after the first and second cutter heads 21 and 22 are mirror images of each other mounted on the tool holder 10, the cutting edges of the first blade 211 and the second blade 221 can face the same direction. For example, the cutting edges of the first cutter head 21 and the second cutter head 22 can both face the first direction, thereby enabling the first blade 211 to cut at a first position on the workpiece 200, and the second blade 221 to cut at a second position on the workpiece 200. This allows the composite tool 100 to simultaneously machine two opposite sidewalls within the groove of the workpiece 200, increasing cutting efficiency. See [link to documentation]. Figure 1 Furthermore, when the tool holder 10 rotates in opposite directions, the positions of the first tool disc 21 and the second tool disc 22 can be interchanged so that the first cutting edge and the second cutting edge can simultaneously face the second direction. See [link to relevant documentation]. Figure 3 The first direction can be clockwise, and the second direction can be counterclockwise.

[0035] Specifically, combined Figure 2 and Figure 3 When the composite tool 100 is used, it is mounted on a machine tool. The machine tool can drive the composite tool 100 to rotate in both the forward and reverse directions, or clockwise and counterclockwise. When the tool holder 10 rotates clockwise, the first tool head 21 and the second tool head 22 can be arranged in a mirror image so that the first insert 211 and the second insert 221 simultaneously face the clockwise direction, thereby achieving cutting. When the rotation direction of the tool holder 10 changes to counterclockwise, the first tool head 21 and the second tool head 22 can be disassembled and their positions swapped so that the first insert 211 and the second insert 221 simultaneously face the counterclockwise direction, thereby achieving cutting. In this way, when the machine tool changes its rotation or rotation direction, the arrangement of the tool heads of the composite tool 100 can be changed to adapt to the machine tool's operation, which can improve the versatility of the composite tool 100 and help reduce machining costs.

[0036] In addition, the first cutter head 21 and the second cutter head 22 are designed to be detachable, which can reduce maintenance and usage costs. For example, if one of the first cutter head 21 or the second cutter head 22 is damaged, it can be replaced individually without replacing the entire tool.

[0037] According to the present invention, the composite tool 100 is provided with a first cutting disc 21 and a second cutting disc 22 detachably connected to the tool holder 10. The cutting edge of the first blade 211 of the first cutting disc 21 and the cutting edge of the second blade 221 of the second cutting disc 22 face opposite directions. In application, the placement position of the cutting disc can be changed according to the rotation direction of the tool holder 10, thereby changing the direction of the cutting edge, improving the versatility of the composite tool 100, and also increasing the cutting efficiency of the composite tool 100.

[0038] Furthermore, combined Figure 2 and Figure 3 In some embodiments of this utility model, the cutter head has a connecting end face 20a and a cutting end face 20b. The cutting blade 20c is disposed on the cutting end face 20b. The connecting end face 20a of the first cutter head 21 faces the connecting end face 20a of the second cutter head 22. The cutting end face 20b of the first cutter head 21 is disposed on the side opposite to the second cutter head 22, and the cutting end face 20b of the second cutter head 22 is disposed on the side opposite to the first cutter head 21. That is, during assembly, the cutting end face 20b of the cutter head can be oriented outwards. This makes it easier for the cutting blade 20c to contact the workpiece 200 and achieve cutting when the cutter head rotates. During assembly, the first cutter head 21 and the second cutter head 22 are axially connected to the tool holder 10, and the cutting end faces 20b of the first cutter head 21 and the second cutter head 22 are opposite to each other. Figure 1 When the cutting tool cuts the groove of the workpiece 200, the insert 20c can contact the upper and lower sidewalls of the workpiece 200 respectively, thereby achieving simultaneous cutting of the two opposing sidewalls within the groove of the workpiece 200. In conjunction with the foregoing, since the upper cutting edges of the first cutter head 21 and the second cutter head 22 face opposite directions, when the cutting end faces 20b of the first cutter head 21 and the second cutter head 22 are opposite to each other, the cutting edges of the first insert 211 and the second insert 221 can face the same direction, thereby performing cutting on the workpiece 200 in the same direction.

[0039] For example, combined Figure 2 The first cutter head 21 is located above the second cutter head 22. The cutting end face 20b of the first cutter head 21 faces upward, and the cutting edge of the first insert 211 faces clockwise. The cutting end face 20b of the second cutter head 22 faces downward, and the cutting edge of the second insert 221 faces clockwise. This assembly configuration can be applied to clockwise cutting scenarios. Figure 3 The second cutter head 22 is located above the first cutter head 21. The cutting end face 20b of the second cutter head 22 faces upward, and the cutting edge of the second blade 221 faces counterclockwise. The cutting end face 20b of the first cutter head 21 faces downward, and the cutting edge of the first blade 211 faces counterclockwise. This assembly state can be applied to counterclockwise cutting scenarios.

[0040] Furthermore, in some embodiments of this utility model, combined with Figures 4 to 7The first cutter head 21 has a first platform 212 on its connecting end face 20a, and the second cutter head 22 has a second platform 222 on its connecting end face 20a. The first platform 212 abuts against the second platform 222 to separate the cutting end faces 20b of the first cutter head 21 and the second cutter head 22. Specifically, the cooperation of the first platform 212 and the second platform 222 can improve the stability after assembly, and the separation of the first cutter head 21 and the second cutter head 22 allows the first cutting insert 211 and the second cutting insert 221 to better fit the wall of the groove of the workpiece 200, improving the cutting effect and facilitating the removal of cutting chips.

[0041] Combination Figure 6 In some embodiments of this utility model, the thickness of the second platform 222 is greater than the thickness of the first platform 212, which is beneficial to increase the size of the gap between the first cutter head 21 and the second cutter head 22, thereby facilitating the matching of the workpiece 200 and improving the cutting effect.

[0042] Alternatively, the thickness of the first platform 212 may be greater than the thickness of the second platform 222. In other words, the thicknesses of the first platform 212 and the second platform 222 may be the same, or the thickness of one platform may be greater than the thickness of the other. Specifically, adjustments can be made according to the actual application, and this utility model is not limited thereto.

[0043] It should be noted that the thickness can be the dimension of the platform extending radially.

[0044] Furthermore, when the groove dimensions of the workpiece 200 to be cut are inconsistent, a fixed distance between the first cutter head 21 and the second cutter head 22 cannot meet the cutting requirements. To improve the versatility of the tool during use, in some embodiments of this utility model, the composite tool 100 also includes an adjusting shim 30. The adjusting shim 30 is disposed between the first cutter head 21 and the second cutter head 22 and is used to adjust the distance between the first cutter head 21 and the second cutter head 22. In this way, adjusting shims 30 with different thicknesses can be set between the first cutter head 21 and the second cutter head 22 according to the size of the groove of the workpiece 200, so that the tool can cut workpieces 200 of various specifications, which is beneficial to improving the practicality of the composite tool 100 and reducing processing costs.

[0045] Specifically, in practical use, the composite tool 100 can be matched with various adjusting pads 30 of different thicknesses and sizes. When applying it, the size of the adjusting pad 30 can be reasonably selected according to the axial dimension of the groove. In addition, multiple adjusting pads 30 of different sizes can also be used in combination to improve the fit between the tool and the groove of the workpiece 200.

[0046] More specifically, in the axial projection, the adjusting shim 30 has the same cross-sectional area as the first platform 212 and / or the second platform 222, which can improve the fit after the adjusting shim 30 is installed. The cross-sectional areas of the first platform 212 and the second platform 222 can also be the same to improve the fit.

[0047] In some embodiments of this utility model, combined with Figure 1 and Figure 2 The tool holder 10 includes a main body 11, a positioning part 12, and a connecting part 13 connected axially. The diameter of the positioning part 12 is larger than the diameter of the connecting part 13. A first tool disc 21 and a second tool disc 22 are sleeved on the connecting part 13. One of the first tool disc 21 and the second tool disc 22 abuts against the positioning part 12 axially, while the other is fixedly connected to the connecting part 13. Specifically, the diameter of the main body 11 can be used for connection with a machine tool. The machine tool can drive the main body 11 to rotate. Therefore, the diameter of the main body 11 can be relatively large, larger than the diameter of the positioning part 12, thereby improving the stability of the composite tool 100 connection with the machine tool and its stability during use. The diameter of the positioning part 12 is larger than the diameter of the connecting part 13. The side of the positioning part 12 facing the connecting part 13 can be constructed with a positioning surface, so that after the first cutter head 21 or the second cutter head 22 is sleeved on the connecting part 13, one end face of the cutter head can abut against the positioning surface, thereby improving the stability of the connection of one cutter head. The other cutter head can abut against the fixing member 42 at the other end of the connecting part 13, thereby improving the stability of the fit.

[0048] More specifically, combined Figure 4 and Figure 7 In some embodiments of this utility model, the cutting end face 20b of the first cutter head 21 is provided with a third platform 213, and the cutting end face 20b of the second cutter head 22 is provided with a fourth platform 224. One of the third platform 213 and the fourth platform 224 abuts against the positioning part 12, and the other abuts against the fixing member 42. That is to say, the cutting end face 20b of the cutter head is also provided with a platform suitable for abutting against the tool holder 10 during assembly, so as to improve the stability after assembly. Among them, the cross-sectional area of ​​the third platform 213 and the fourth platform 224 can be the same, and the cross-sectional area of ​​the mating surface of the positioning surface and the fixing member 42 is the same, thereby improving the mating effect and improving the integrity of the composite tool 100 after assembly.

[0049] Combination Figure 4 and Figure 5In some embodiments of this utility model, the tool holder 10 is provided with a radially protruding limiting member 131, the first tool disc 21 has a first through hole 201, and a first groove 202 is provided in the first through hole 201. The tool holder 10 passes through the first through hole 201 and at least a portion of the limiting member 131 extends into the first groove 202. The second tool disc 22 has a second through hole 203, and a second groove 204 is provided in the second through hole 203. The tool holder 10 passes through the second through hole 203 and at least a portion of the limiting member 131 extends into the second groove 204. That is to say, the first tool disc 21 is sleeved on the tool holder 10 through the first through hole 201, and the radially protruding limiting member 131 on the tool holder 10 can cooperate with the first groove 202 in the first through hole 201. The assembly of the second tool disc 22 is similar and will not be described in detail here. Therefore, the limiting member 131, in conjunction with the groove, can restrict the first tool disc 21 from rotating circumferentially relative to the tool holder 10. In this way, when the machine tool drives the tool holder 10 to rotate, the first tool disc 21 and the second tool disc 22 can rotate synchronously with the tool holder 10.

[0050] Optionally, the first through hole 201 penetrates the first cutter head 21, and the first platform 212 and the third platform 213 can be located on the outer periphery of the first through hole 201. The second through hole 203 penetrates the second cutter head 22, and the second platform 222 and the fourth platform 224 can be located on the outer periphery of the second through hole 203. The first cutter head 21 and the second cutter head 22 can be integrally formed to facilitate machining and manufacturing and improve the overall integrity of the cutter head.

[0051] Furthermore, combined Figure 8 In some embodiments of this utility model, the adjusting pad 30 has a third through hole 301, and a third groove 302 is provided in the third through hole 301. The tool bar 10 passes through the third through hole 301 and at least a portion of the limiting member 131 extends into the third groove 302. Thus, the adjusting pad 30 can be assembled onto the tool bar 10 through the third through hole 301, and the third groove 302 cooperates with the limiting member 131 to restrict the adjusting pad 30 from rotating circumferentially relative to the tool bar 10, which helps to improve the stability after assembly. When the composite tool 100 rotates, the adjusting pad 30 can maintain a stable state.

[0052] More specifically, the limiting member 131 can be square in structure. The first groove 202, the second groove 204, and the third groove 302 are constructed into a square groove to fit with the limiting member 131. The square structure helps to limit the circumferential displacement of the cutter head or the adjusting pad 30. The limiting member 131 can be provided in the connecting part 13. Specifically, the connecting part 13 is provided with a limiting groove 103. A part of the limiting member 131 extends into the limiting groove 103 and the other part protrudes from the surface of the connecting part 13. The limiting groove 103 and the limiting member 131 extend along the axial direction of the connecting part 13. In this way, when the first cutter head 21, the second cutter head 22, and the adjusting pad 30 are assembled, the groove can be directly aligned with the limiting member 131, which helps to achieve a positioning effect during assembly and facilitates quick assembly. At the same time, the limiting member 131 can circumferentially limit the first cutter head 21, the second cutter head 22, and the adjusting pad 30.

[0053] Alternatively, the composite tool 100 may not have the adjusting shim 30 provided, such as... Figure 10 As shown.

[0054] Combination Figure 4 In some embodiments of this utility model, the diameter of the cutter head is D, the thickness of the blade 20c is S, and the number of blades 20c is Z, satisfying πD / 4S≥Z≥πD / 8S. Specifically, πD is the circumference of the cutter head. The number of blades 20c that can be arranged around the circumference or outer periphery of the cutter head is determined based on the thickness of the blade 20c and the circumference of the cutter head, i.e., the number of blades 20c Z. Since a larger blade 20c thickness will occupy more space on the cutter head when it is installed, if the same number of blades 20c are installed on the cutter head, a larger blade 20c thickness will result in a smaller gap between two blades 20c, which is not conducive to chip removal. Furthermore, when installing blades 20c, the cutter head needs to be slotted. If the blades 20c thickness is installed too tightly, it will reduce the structural strength of the cutter head. Therefore, based on the actual assembly, the number of inserts 20c can be calculated using the formula above, according to the circumference of the cutter head and the thickness of the inserts 20c. This allows for an increase in the number of inserts 20c while maintaining the functionality of the composite tool 100. This results in greater cutter head rigidity, a relatively smaller cutting load on each insert 20c, a more uniform distribution of cutting force, and a smoother cutting process, which is beneficial for improving surface finish and extending tool life. Furthermore, an increased number of inserts 20c allows for a larger feed per revolution of the cutter head, significantly improving metal removal rate and thus increasing machining efficiency.

[0055] For example, if the diameter D of the cutter head is 100 mm and the thickness of the blade 20c is 5 mm, then the range of the number of blades 20c that can be set is approximately 16 ≥ Z ≥ 8. If the diameter D of the cutter head is 150 mm and the thickness of the blade 20c is 5 mm, then the range of the number of blades 20c that can be set is approximately 24 ≥ Z ≥ 12.

[0056] In some embodiments of this utility model, the thickness of the blade 20c is S, and the distance between two blades 20c is H, satisfying 4S≥H≥8S. Specifically, multiple blades 20c are spaced apart on the outer periphery of the cutter head, wherein the distance between the multiple blades 20c is the same, which can improve structural stability. By limiting the distance between two blades 20c, the appropriate number of blades 20c to be set on a cutter head with a certain perimeter can also be calculated. By controlling the size of the distance H between two blades 20c, the number of blades 20c can be increased as much as possible while ensuring the structural strength of the tool and the chip removal effect of the tool, thereby improving the cutting effect.

[0057] Generally, the thickness of the blade 20c is between 5 and 10 mm. For example, when the thickness of the blade 20c is 5 mm and the diameter of the cutter head is 100 mm, the distance H between the two blades 20c can be 20 mm ≥ H ≥ 40 mm. It can also be seen that the number of blades 20c can be set to approximately 16 ≥ Z ≥ 8 (where π is taken as 3.14, and the result is rounded).

[0058] Combination Figure 4 In some embodiments of this utility model, the periphery of the cutting end face 20b is provided with a plurality of spaced mounting grooves 205 and clearance grooves 206. The clearance grooves 206 are connected to the mounting grooves 205. At least a portion of a plurality of blades 20c extends into the mounting grooves 205, and the cutting edges of the blades 20c face the clearance grooves 206. The plurality of mounting grooves 205 can provide space for the blades 20c, and the clearance grooves 206 are connected to the blades 20c, so that the cutting chips generated by the blades 20c during cutting can be discharged through the clearance grooves 206. Furthermore, the composite tool 100 also includes a fastener 41. One end of the fastener 41 abuts against the blade 20c, and the other end is installed in the clearance groove 206. Therefore, the clearance groove 206 can also provide assembly space for the fastener 41, improving the structural compactness and integrity of the tool head.

[0059] In some embodiments of this utility model, combined with Figure 9 The cutting blade 20c includes a first end face 210, a second end face 220, and a side face 230. The side face 230 connects the first end face 210 and the second end face 220. In the thickness direction projection, the cross-sectional area of ​​the second end face 220 is larger than that of the first end face 210. The cutting edge is located on the second end face 220. Therefore, after assembly, the cutting edge of the cutting blade 20c can be located at the outer periphery of the cutting blade 20c, facilitating cutting. Specifically, the cutting blade 20c can have a certain thickness to improve structural stability and strength. The cutting blade 20c can be shaped like a frustum with a trapezoidal cross-section.

[0060] The following describes a specific embodiment of the composite cutting tool 100 of the present invention with reference to the accompanying drawings.

[0061] Combination Figure 2 The composite cutting tool 100 rotates around its central axis X and includes a cutting disc, a cutting shank 10, an adjusting pad 30, and cutting blades 20c. The cutting disc is cylindrical and has a through hole. The cutting blades 20c are mounted on the cutting disc. The cutting shank 10, the cutting disc, and the adjusting pad 30 are all coaxially arranged around the axis X. The cutting disc includes a first cutting disc 21 and a second cutting disc 22. The first cutting disc 21 and the second cutting disc 22 have roughly the same structure, differing only in the orientation of their cutting edges. In the axial direction, the cutting blades 20c mounted on the first cutting disc 21 and the cutting blades 20c mounted on the second cutting disc 22 are arranged in a mirror-symmetrical manner. The adjusting pad 30 is located between the first cutting disc 21 and the second cutting disc 22. The adjusting pad 30 is cylindrical and has a through hole in its center. A square groove runs through the sidewall of the through hole of the adjusting pad 30 along its thickness direction.

[0062] Furthermore, the cutter head includes a cutting end face 20b, a connecting end face 20a, and a cylindrical sidewall. The connecting end face 20a of the cutter head has a platform. A through hole penetrates the platform connecting the cutting end face 20b and the connecting end face 20a. A groove is provided on the through hole of the cutter head; the groove is square and extends along the sidewall of the through hole in the central axial direction. The cutting insert 20c is square and has a positive structure; the cutting insert 20c is disposed on the sidewall of the cutter head near the cutting end face 20b.

[0063] Furthermore, the tool holder 10 has at least two sections in the axial direction, with different diameters to form a stepped structure. This not only improves structural stability but also facilitates contact and engagement with the tool disc, thereby enhancing the stability of the tool disc after assembly.

[0064] The smaller diameter end of the tool holder 10 is a connecting part 13 for connecting to the tool disc, and the larger diameter end is a positioning part 12. The connecting part 13 has a threaded hole and a groove on its circumferential surface. A positioning surface is provided at the intersection of the larger and smaller diameters, and the positioning surface is used to abut against the tool disc. The connecting part 13 has a limiting groove 103, and a limiting member 131 protruding from the connecting part 13 is provided in the limiting groove 103. The limiting member 131 is used for anti-rotation positioning of the tool disc and the adjusting pad 30.

[0065] During assembly, the limiting member 131 is disposed in the limiting groove 103 of the tool holder 10. The first tool disc 21 is connected to the tool holder 10 through a through hole, the adjusting pad 30 is connected to the tool holder 10 through a through hole, and the second tool disc 22 is connected to the tool holder 10 through a through hole. The adjusting pad 30 separates the first tool disc 21 and the second tool disc 22, and one end of the adjusting pad 30 contacts the platform surface of the connecting end face 20a of the first tool disc 21, while the other end of the adjusting pad 30 contacts the platform surface of the connecting end face 20a of the second tool disc 22, so that the cutting end faces 20b of the tool discs are all facing away from the adjusting pad 30 and towards the two ends of the tool holder 10. The first groove 202 of the first tool disc 21 contacts and engages with the limiting member 131, the third groove 302 of the adjusting pad 30 contacts and engages with the limiting member 131, and the second groove 204 of the second tool disc 22 contacts and engages with the limiting member 131 to prevent the tool discs and the adjusting pad 30 from rotating or shifting around the tool holder 10. The composite tool 100 also includes a fixing member 42, which connects the threaded hole of the tool holder 10 and the cutting end face 20b of the tool disc. The fixing member 42 can be a screw. Tightening the fixing member 42 can fix the tool disc and the adjusting pad 30 to the small diameter end of the tool holder 10 and the connecting part 13, preventing them from displacing axially along the tool holder 10.

[0066] In practical applications, when the composite tool 100 processes the groove of the workpiece 200, the upper end of the tool shank 10 is connected to the machine tool, and the first cutter head 21 and the second cutter head 22 are located at the lower end of the tool shank 10. The tool shank 10, the first cutter head 21, the second cutter head 22, and the adjusting pad 30 are all coaxially arranged around the axis X. The first groove 202 of the first cutter head 21, the third groove 302 of the adjusting pad 30, and the second groove 204 of the second cutter head 22 all contact and engage with the limiting member 131 located on the tool shank 10. Next, the end of the tool shank 10 with the threaded hole is connected to the cutting end face 20b at the bottom of the cutter head by screws (fixing member 42), and the screws are tightened until the positioning surface of the tool shank 10 contacts the cutting end face 20b facing the cutter head at the upper end of the tool shank 10. At this time, the cutter head, the tool shank 10, the limiting member 131, the adjusting pad 30, and the cutting tool 20c are connected into a fixed whole. Since no individual component can rotate or move vertically or axially on its own, structural stability can be improved and processing efficiency can be increased.

[0067] Combination Figure 1When the cutting tool is mounted on a machine tool that rotates clockwise or forward, the cutting end face 20b of the first cutting head 21 faces the upper end of the tool holder 10, and the cutting end face 20b of the second cutting head 22 faces the lower end of the tool holder 10. An adjusting shim 30 is positioned between the first cutting head 21 and the second cutting head 22, with one end contacting the platform of the connecting end face 20a of the first cutting head 21 and the other end contacting the platform of the connecting end face 20a of the second cutting head 22. The inserts 20c on the first cutting head 21 and the inserts 20c on the second cutting head 22 are mirror-symmetrical. The composite tool 100 rotates clockwise along the machine tool spindle for cutting. The first cutting head 21 processes the upper sidewall of the groove cavity of the workpiece 200, while the second cutting head 22 processes the lower sidewall of the groove cavity of the workpiece 200.

[0068] Combination Figure 3 When the cutting tool is installed on a machine tool that rotates counterclockwise or in a reverse direction, the positions of the first cutting tool head 21 and the second cutting tool head 22 are reversed by adjusting the screws at the bottom of the cutting tool head. The cutting end face 20b of the first cutting tool head 21 faces the lower end of the tool holder 10, and the cutting end face 20b of the second cutting tool head 22 faces the upper end of the tool holder 10. An adjusting shim 30 is disposed between the first cutting tool head 21 and the second cutting tool head 22. Similarly, one end of the adjusting shim 30 contacts the platform surface of the connecting end face 20a of the second cutting tool head 22, and the other end contacts the platform surface of the connecting end face 20a of the first cutting tool head 21. The inserts 20c disposed on the second cutting tool head 22 and the inserts 20c disposed on the first cutting tool head 21 are mirror-symmetrical. The cutting tool rotates counterclockwise along the machine tool spindle. The first cutting tool head 21 processes the lower sidewall of the groove cavity of the workpiece 200, while the second cutting tool head 22 processes the upper sidewall of the groove cavity of the workpiece 200.

[0069] Therefore, without changing the tool, the same tool can be used for both forward and reverse rotation machining, and the two opposite sidewalls of the groove cavity of workpiece 200 can be machined simultaneously, greatly saving tool usage costs and increasing machining efficiency. When it is necessary to use the tool to machine grooves of different thicknesses, by adjusting the bottom screw, the adjusting shim 30 located between the first tool disc 21 and the second tool disc 22 can be removed or replaced with an adjusting shim 30 of different thicknesses to match the groove size of workpiece 200, so that groove cavities of different thicknesses can be machined without changing the tool, thus saving the usage cost of the composite tool 100.

[0070] In the description of this utility model, it should be understood that the terms "center", "lateral", "thickness", "upper", "lower", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0071] 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 indicated technical features. Thus, 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, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0072] 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 or an electrical connection; 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.

[0073] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "upper surface" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "lower surface" of the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0074] 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.

[0075] 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 composite cutting tool (100), characterized in that, include: Tool holder (10); A first cutter head (21) is detachably sleeved on the cutter bar (10). The first cutter head (21) is provided with a plurality of first blades (211), and the cutting edges of the first blades (211) face a first direction. The second cutter head (22) is detachably sleeved on the cutter bar (10) and arranged in a mirror image of the first cutter head (21). The second cutter head (22) is provided with a plurality of second blades (221), the cutting edges of the second blades (221) facing a second direction, the first direction and the second direction being opposite.

2. The composite cutting tool (100) according to claim 1, characterized in that, The cutter head has a connecting end face (20a) and a cutting end face (20b), and the cutting blade is disposed on the cutting end face (20b). The connecting end face (20a) of the first cutter head (21) faces the connecting end face (20a) of the second cutter head (22). The cutting end face (20b) of the first cutter head (21) is disposed on the side away from the second cutter head (22), and the cutting end face (20b) of the second cutter head (22) is disposed on the side away from the first cutter head (21).

3. The composite cutting tool (100) according to claim 2, characterized in that, The first cutter head (21) has a first platform (212) on its connecting end face (20a), and the second cutter head (22) has a second platform (222) on its connecting end face (20a). The first platform (212) abuts against the second platform (222) to separate the cutting end faces (20b) of the first cutter head (21) and the second cutter head (22).

4. The composite cutting tool (100) according to claim 3, characterized in that, The thickness of the second platform (222) is greater than the thickness of the first platform (212); or the thickness of the first platform (212) is greater than the thickness of the second platform (222).

5. The composite cutting tool (100) according to claim 1, characterized in that, The tool holder (10) includes a main body (11), a positioning part (12), and a connecting part (13) connected along the axial direction. The diameter of the positioning part (12) is larger than the diameter of the connecting part (13). The first tool disc (21) and the second tool disc (22) are sleeved on the connecting part (13), and the other one is connected to the connecting part (13) through a fastener (42).

6. The composite cutting tool (100) according to claim 2, characterized in that, The tool holder (10) includes a positioning part (12) and a connecting part (13). The diameter of the positioning part (12) is larger than the diameter of the connecting part (13). The first cutter head (21) and the second cutter head (22) are sleeved on the connecting part (13) and fixedly connected by a fastener (42). The cutting end face (20b) of the first cutter head (21) is provided with a third platform (213), and the cutting end face (20b) of the second cutter head (22) is provided with a fourth platform (224). One of the third platform (213) and the fourth platform (224) abuts against the positioning part (12), and the other abuts against the fastener (42).

7. The composite cutting tool (100) according to claim 1, characterized in that, The cutter bar (10) is provided with a radially protruding limiting member (131). The first cutter disc (21) has a first through hole (201) and a first groove (202) in the first through hole (201). The cutter bar (10) passes through the first through hole (201) and at least a portion of the limiting member (131) extends into the first groove (202). The second cutter disc (22) has a second through hole (203) and a second groove (204) in the second through hole (203). The cutter bar (10) passes through the second through hole (203) and at least a portion of the limiting member (131) extends into the second groove (204).

8. The composite cutting tool (100) according to any one of claims 1-7, characterized in that, It also includes an adjusting pad (30), which is disposed between the first cutter head (21) and the second cutter head (22). The adjusting pad (30) is used to adjust the distance between the first cutter head (21) and the second cutter head (22). The cutter bar (10) is provided with a radially protruding limiting member (131). The adjusting pad (30) has a third through hole (301). The third through hole (301) is provided with a third groove (302). The cutter bar (10) passes through the third through hole (301) and at least a portion of the limiting member (131) extends into the third groove (302).

9. The composite cutting tool (100) according to any one of claims 1-7, characterized in that, The diameter of the cutter head is D, the thickness of the blade (20c) is S, and the number of blades (20c) is Z, satisfying πD / 4S≥Z≥πD / 8S; and / or The thickness of the blade (20c) is S, and the distance between the two blades (20c) is H, satisfying 4S≥H≥8S.

10. The composite cutting tool (100) according to claim 2, characterized in that, The cutting end face (20b) has a plurality of spaced mounting grooves (205) and clearance grooves (206) around its periphery. The clearance grooves (206) are connected to the mounting grooves (205). At least a portion of a plurality of blades (20c) extends into the mounting grooves (205), and the cutting edges of the blades (20c) face the clearance grooves (206).

11. The composite cutting tool (100) according to claim 10, characterized in that, It also includes a fastener (41), one end of which abuts against the blade (20c) and the other end of which is mounted in the clearance groove (206); and / or The blade (20c) includes a first end face (210), a second end face (220), and a side face (230). The side face (230) connects the first end face (210) and the second end face (220). In the projection of the thickness direction, the cross-sectional area of ​​the second end face (220) is larger than the cross-sectional area of ​​the first end face (210). The cutting edge is disposed on the second end face (220).

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