Tools for machining turbine housings

Abstract

This application relates to a cutting tool for machining turbine housings, including a tool holder, a tool head, a cutting insert assembly, a locking assembly, and a cooling nozzle. The cutting insert assembly includes a finishing insert and a roughing insert, with the roughing insert having a first wedge-shaped surface. The locking assembly includes a first locking member and a second locking member, with the second locking member having a second wedge-shaped surface that forms a face-to-face fit with the first wedge-shaped surface. By using the finishing and roughing inserts, simultaneous finishing and roughing can be achieved, improving utilization and saving tool positions. The first locking member locks the machining insert and the roughing insert into their corresponding mounting slots, and the second locking member, with the first and second wedge-shaped surfaces engaging, further locks the roughing insert into the mounting slot, increasing the locking force and ensuring stability during machining. The cooling nozzle cools the finishing and roughing inserts.

Description

Technical Field

[0001] This application relates to the field of cutting tool technology, and in particular to a cutting tool for machining turbine housings. Background Technology

[0002] With the continued growth of global car ownership, the automotive industry's consumption of fossil fuels has further intensified. Turbocharging technology has become one of the most effective and widely recognized technologies for reducing fuel consumption and emissions from internal combustion engines. The intermediate housing of the turbocharger connects the turbine housing and the compressor housing. Since the turbine housing needs to connect to the vehicle's exhaust pipe, its machining requirements are quite high.

[0003] In related technologies, turbine housings are cut using cutting tools. These tools typically have tool holders that can only hold either roughing or finishing inserts, requiring two tool positions and resulting in low utilization of the tool holder. During machining, the roughing inserts are subjected to greater forces, making them prone to loosening. Additionally, the inserts generate high temperatures during cutting, increasing wear and reducing their lifespan. Summary of the Invention

[0004] Therefore, it is necessary to provide a tool for turbine housing machining that can simultaneously perform finishing and roughing, improve tool holder head utilization, save tool positions, keep roughing inserts stable during machining, and cool the inserts to increase their service life.

[0005] A cutting tool for machining turbine housings, comprising:

[0006] Tool holder;

[0007] A tool holder head is connected to one end of the tool shank; the tool holder head has two tool mounting grooves.

[0008] The blade assembly includes a finishing blade and a roughing blade, the finishing blade and the roughing blade are respectively disposed in two mounting slots, and the roughing blade is provided with a first wedge-shaped surface;

[0009] A locking assembly, comprising a first locking member and a second locking member, wherein the first locking member is used to lock the finishing insert and the roughing insert into the corresponding mounting slots; the second locking member is provided with a second wedge-shaped surface that forms a surface-to-surface fit with the first wedge-shaped surface;

[0010] A cooling nozzle is disposed on the tool holder head and is used to spray a cooling medium onto the finishing tool and the roughing tool.

[0011] In the above solution, by simultaneously setting both finishing and roughing inserts on the tool holder head, simultaneous finishing and roughing can be achieved, improving the utilization rate of the tool holder head and saving tool positions. By setting a first locking member, the finishing insert and roughing insert can be locked into the corresponding mounting groove. The second locking member, with the first wedge surface and the second wedge surface cooperating with each other, can further lock the roughing insert into the mounting groove, which can improve the locking force of the roughing insert and make the roughing insert stable during the machining process. By setting a cooling nozzle, the cooling nozzle can spray cooling medium onto the finishing insert and roughing insert to cool them down and increase their lifespan.

[0012] In one embodiment, the second locking member includes a wedge and a locking screw, the second wedge-shaped surface being formed on the wedge; the wedge is connected to the tool holder head by the locking screw.

[0013] In one embodiment, the tool holder head has a wedge mounting hole, the locking screw includes a first threaded section, a second threaded section and a smooth section located between the first threaded section and the second threaded section, the wedge is threadedly connected to the first threaded section, and the second threaded section is threadedly connected to the wedge mounting hole.

[0014] In one embodiment, the threads on the first threaded segment have opposite directions of rotation to the threads on the second threaded segment.

[0015] When it is necessary to lock the roughing insert with the second locking element, tighten the locking screw. Since the threads on the first threaded section and the threads on the second threaded section are in opposite directions, the wedge moves closer to the square of the roughing insert, and the first wedge surface and the second wedge surface fit together. This allows the wedge to apply a downward locking force to the roughing insert, and also makes the roughing insert closer to the tool holder.

[0016] In one embodiment, the wedge is further provided with a transition arc surface to facilitate rotation of the wedge, and the transition arc surface is located below the second wedge surface.

[0017] In one embodiment, the cutting tool further includes a cooling base detachably connected to the tool holder head, and the cooling nozzle is rotatably connected to the cooling base.

[0018] By rotatably connecting the cooling nozzle to the cooling base, the angle and direction of the cooling nozzle can be adjusted, improving its versatility.

[0019] In one embodiment, the tool holder head is further provided with a first cooling channel communicating with the cooling nozzle; the tool bar is further provided with a second cooling channel communicating with the first cooling channel.

[0020] In one embodiment, the first cooling channel extends through the tool holder head, and the tool further includes a sealing member for sealing the openings at both ends of the first cooling channel.

[0021] By installing sealing components, the openings at both ends of the first cooling channel are sealed to prevent the cooling medium from flowing out from the openings at both ends of the first cooling channel.

[0022] In one embodiment, the sealing element is threadedly connected to the first cooling channel.

[0023] In one embodiment, both the finishing blade and the roughing blade are provided with locking holes; both mounting slots are provided with blade mounting holes, and the first locking member passes through the locking hole and can be threadedly connected to the corresponding blade mounting hole. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the tool used for machining turbine housings, as shown in the first embodiment of this application.

[0027] Figure 2 This is a schematic diagram of the structure of the first locking member shown in the first embodiment of this application.

[0028] Figure 3 This is a schematic diagram of the structure of the second locking member shown in the first embodiment of this application.

[0029] Figure 4 This is a schematic diagram of the sealing component shown in the first embodiment of this application.

[0030] Explanation of reference numerals in the attached figures

[0031] 10. Tool for turbine housing machining; 100. Tool holder; 200. Tool head; 210. Tool mounting groove; 220. First cooling channel; 300. Insert assembly; 310. Finishing insert; 320. Roughing insert; 321. First wedge face; 400. Locking assembly; 410. First locking element; 420. Second locking element; 421. Second wedge face; 422. Wedge block; 4221. Transition arc surface; 423. Locking screw; 500. Cooling nozzle; 600. Cooling base; 700. Sealing element. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0034] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0038] Please see Figure 1 , Figure 2 and Figure 3 This application relates to a tool 10 for machining turbine housings, comprising a tool holder 100, a tool head 200, a cutting insert assembly 300, a locking assembly 400, and a cooling nozzle 500. The tool head 200 is connected to one end of the tool holder 100. The cutting insert assembly 300 is disposed on the tool head 200 for machining the workpiece. The locking assembly 400 is used to lock the cutting insert assembly 300 onto the tool head 200. The cooling nozzle 500 is disposed on the tool head 200 and is used to spray a cooling medium onto the finishing cutting insert 310 and the roughing cutting insert 320 to cool them down and increase their lifespan.

[0039] The tool holder 100 is made of high-precision mold steel using a milling and turning center, and then heat-treated to give it high hardness, resulting in excellent wear resistance and impact resistance. The surface coating of the tool holder 100 further enhances its rust prevention and resistance to cutting fluid corrosion.

[0040] Please see Figure 1 , Figure 2 and Figure 3 The tool holder 200 has two mounting slots 210. The insert assembly 300 includes a finishing insert 310 and a roughing insert 320, which are respectively disposed within the two mounting slots 210. Specifically, a portion of the finishing insert 310 and the roughing insert 320 is located within the mounting slots 210, while the other portion extends out of the mounting slots 210. The portions of the finishing insert 310 and the roughing insert 320 extending out of the mounting slots 210 are provided with cutting portions for cutting the workpiece.

[0041] More specifically, the cooling nozzle 500 is used to spray cooling medium onto the cutting portions of the finishing insert 310 and the roughing insert 320 to cool them down and increase their lifespan. The cooling medium can be coolant or cool air. In this embodiment, coolant is used.

[0042] It should be noted that the installation positions of the finishing insert 310 and the roughing insert 320 can be set according to actual needs, and this application does not impose any limitations. For example, the finishing insert 310 and the roughing insert 320 can be symmetrically arranged relative to the central axis of the tool holder 100.

[0043] Please see Figure 1 , Figure 2 and Figure 3 The locking assembly 400 includes a first locking member 410 and a second locking member 420. The first locking member 410 is used to lock the finishing insert 310 and the roughing insert 320 into their corresponding mounting grooves 210. The roughing insert 320 is provided with a first wedge-shaped surface 321. The second locking member 420 is provided with a second wedge-shaped surface 421 that forms a surface-to-surface fit with the first wedge-shaped surface 321. The first wedge-shaped surface 321 and the second wedge-shaped surface 421 cooperate with each other to further lock the roughing insert 320 into the mounting groove 210, so that the roughing insert 320 can remain stable during machining.

[0044] It should be noted that the first wedge-shaped surface 321 is disposed on the side wall of the roughing insert 320. The second locking member 420 is disposed close to the side wall of the roughing insert 320. The first wedge-shaped surface 321 and the second wedge-shaped surface 421 can be disposed opposite to each other. By operating the second locking member 420 to move, the second wedge-shaped surface 421 can be driven to be disposed in a direction close to the first wedge-shaped surface 321, and the second wedge-shaped surface 421 can be made to abut against the first wedge-shaped surface 321, thereby further locking the roughing insert 320 within the mounting groove 210. Specifically, the first wedge-shaped surface 321 and the second wedge-shaped surface 421 are inclined surfaces that are inclined relative to the side wall of the roughing insert 320.

[0045] It is important to understand that during the machining process, the finishing insert 310 experiences relatively small forces, therefore, there is no need to install a second locking element 420 to further lock the finishing insert 310. However, the roughing insert 320 experiences larger forces. Therefore, in addition to being locked by the first locking element 410, further locking by the second locking element 420 can increase the locking force of the roughing insert 320, allowing it to remain stable during machining and effectively ensuring the machining effect.

[0046] By simultaneously arranging finishing inserts 310 and roughing inserts 320 on the tool holder head 200, simultaneous finishing and roughing can be achieved, improving the utilization rate of the tool holder head 200 and saving tool positions. By arranging a first locking member 410, the finishing inserts and roughing inserts 320 can be locked in the corresponding mounting grooves 210. By arranging a second locking member 420, the first wedge surface 321 and the second wedge surface 421 cooperate to further lock the roughing insert 320 in the mounting grooves 210, which can improve the locking force of the roughing insert 320 and make the roughing insert 320 stable during the machining process. By arranging a cooling nozzle 500, the cooling nozzle 500 can spray cooling medium onto the finishing inserts 310 and roughing inserts 320 to cool them down and increase their lifespan.

[0047] Please see Figure 1 , Figure 2 and Figure 3 According to some embodiments of this application, optionally, both the finishing insert 310 and the roughing insert 320 are provided with locking holes. Both mounting slots 210 are provided with insert mounting holes, and two first locking members 410 are respectively inserted into the corresponding locking holes and can be threadedly connected to the corresponding insert mounting holes. It should be noted that the inner wall of the locking hole is threaded, and the first locking member 410 is threadedly connected to the locking hole. The inner wall of the locking hole can also be smooth. The first locking member 410 is a bolt.

[0048] It should be understood that the effective locking depth of the first locking member 410 is 1 to 1.5 times the thickness of the finishing insert 310 and the roughing insert 320, which can effectively lock the finishing insert 310 and the roughing insert 320 into the corresponding mounting groove 210.

[0049] Please see Figure 1 , Figure 2 and Figure 3 According to some embodiments of this application, optionally, the second locking member 420 includes a wedge 422 and a locking screw 423, and a second wedge-shaped surface 421 is formed on the wedge 422. The wedge 422 is connected to the tool holder head 200 by the locking screw 423.

[0050] Specifically, the tool holder head 200 has a wedge mounting hole. The locking screw 423 includes a first threaded section, a second threaded section, and a smooth section located between the first and second threaded sections. The wedge 422 is threaded to the first threaded section, and the second threaded section is threaded to the wedge mounting hole, which facilitates the replacement of the wedge 422.

[0051] The threads on the first threaded section and the threads on the second threaded section have opposite directions of rotation. When it is necessary for the second locking member 420 to lock the roughing insert 320, tighten the locking screw 423. Since the threads on the first threaded section and the threads on the second threaded section have opposite directions of rotation, the wedge block 422 moves closer to the roughing insert 320, and the first wedge surface 321 and the second wedge surface 421 fit together. This allows the wedge block 422 to provide a downward locking force to the roughing insert 320, and also brings the roughing insert 320 closer to the tool holder head 200.

[0052] When it is necessary to replace the roughing insert 320, simply loosen the locking screw 423. Since the threads on the first threaded section and the threads on the second threaded section turn in opposite directions, the wedge 422 moves away from the roughing insert 320 in a square shape. After the wedge 422 is a certain distance away from the roughing insert 320, the wedge 422 can be rotated, which greatly saves the replacement time of the roughing insert 320 and improves the processing efficiency of the roughing insert 320.

[0053] Please see Figure 1 , Figure 2 and Figure 3 According to some embodiments of this application, optionally, a transition arc surface 4221 is also provided on the wedge 422 to facilitate the rotation of the wedge 422. The transition arc surface 4221 is disposed below the second wedge surface 421. Specifically, the transition arc surface 4221 is disposed on the side wall of the rotating wedge 422 and is disposed in front of the tightening path of the locking screw 423, while the second wedge surface 421 is disposed behind the moving path of the locking screw 423.

[0054] It should be understood that after the wedge 422 and the roughing insert 320 are separated by a certain distance, the transition arc surface 4221 is provided so that when the wedge 422 is rotated, the wedge 422 and the roughing insert 320 will not interfere with each other, and the rotation of the wedge 422 will not be affected.

[0055] Please see Figure 1 , Figure 2 and Figure 3 According to some embodiments of this application, optionally, the cutting tool also includes a cooling base 600, which is detachably connected to the tool holder head 200, and the cooling nozzle 500 is rotatably connected to the cooling base 600.

[0056] Specifically, one end of the cooling nozzle 500 protrudes to form a universal rotating ball head, and the cooling base 600 is provided with a universal connecting sleeve that is omnidirectionally connected to and does not disengage from the universal rotating ball head. By omnidirectionally connecting the cooling nozzle 500 to the cooling base 600, the angle and direction of the cooling nozzle 500 can be adjusted, improving the versatility of the cooling nozzle 500.

[0057] The cooling base 600 has a universal connector sleeve at one end and a threaded connector at the other end, which is threadedly connected to the tool holder head 200.

[0058] By detachably connecting the cooling base 600 to the tool holder head 200, the cooling base 600 and the cooling nozzle 500 can be easily replaced and disassembled.

[0059] Please see Figure 1 , Figure 2 and Figure 3 According to some embodiments of this application, optionally, the tool holder head 200 is further provided with a first cooling channel 220 communicating with the cooling nozzle 500. The tool shank 100 is further provided with a second cooling channel communicating with the first cooling channel 220. Specifically, a threaded connecting post is provided with a third cooling channel communicating with the cooling nozzle 500. The tool holder head 200 is further provided with a fourth cooling channel communicating with both the third cooling channel and the first cooling channel 220.

[0060] More specifically, the extension direction of the second cooling channel is parallel to the central axis of the tool holder 100. The extension direction of the first cooling channel 220 is perpendicular to the extension direction of the second cooling channel. The extension directions of the third cooling channel and the fourth cooling channel coincide with each other and intersect with the extension direction of the first cooling channel 220.

[0061] Please see Figure 1 , Figure 2 and Figure 4According to some embodiments of this application, optionally, the first cooling channel 220 extends through the tool holder head 200. The tool also includes a sealing member 700, which is used to seal the openings at both ends of the first cooling channel 220. Specifically, the outer wall of the sealing member 700 is threaded, and the sealing member 700 is threadedly connected to the first cooling channel 220. After installing the sealing member 700, a fastening adhesive can be applied to the outer side of the sealing member 700 to ensure that the sealing member 700 will not fall off.

[0062] Since the outer wall of the sealing component 700 is threaded, the sealing component 700 can be locked inside the first cooling channel 220, which can seal the openings at both ends of the first cooling channel 220 while ensuring the overall aesthetics.

[0063] It should be understood that in order to set up the fourth cooling channel, the first cooling channel 220 needs to be set through the tool holder head 200. Therefore, a sealing member 700 is required to seal the openings at both ends of the first cooling channel 220 to prevent the cooling medium from flowing out from the openings at both ends of the first cooling channel 220.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A cutting tool for machining turbine housings, characterized in that, include: Tool holder; A tool holder head is connected to one end of the tool shank; the tool holder head has two tool mounting grooves. The blade assembly includes a finishing blade and a roughing blade, the finishing blade and the roughing blade are respectively disposed in two mounting slots, and the roughing blade is provided with a first wedge-shaped surface; A locking assembly includes a first locking member and a second locking member. The first locking member is used to lock the finishing insert and the roughing insert into the corresponding mounting grooves. The second locking member is provided with a second wedge-shaped surface that forms a surface-to-surface fit with the first wedge-shaped surface. The first wedge-shaped surface and the second wedge-shaped surface cooperate with each other to further lock the roughing insert into the mounting grooves. The second locking member includes a wedge and a locking screw, and the second wedge-shaped surface is formed on the wedge; the wedge is connected to the tool holder head by the locking screw; The tool holder head has a wedge mounting hole, and the locking screw includes a first threaded section, a second threaded section, and a smooth section located between the first threaded section and the second threaded section. The wedge is threadedly connected to the first threaded section, and the second threaded section is threadedly connected to the wedge mounting hole. The threads on the first threaded segment have opposite directions of rotation to the threads on the second threaded segment; The wedge is also provided with a transition arc surface to facilitate rotation of the wedge. The transition arc surface is located below the second wedge-shaped surface. The transition arc surface is used to prevent interference with the roughing tool when the wedge rotates. A cooling nozzle is disposed on the tool holder head and is used to spray a cooling medium onto the finishing tool and the roughing tool. The cutting tool also includes a cooling base, which is detachably connected to the tool holder head, and the cooling nozzle is rotatably connected to the cooling base. The tool holder head is also provided with a first cooling channel that communicates with the cooling nozzle; the tool bar is also provided with a second cooling channel that communicates with the first cooling channel.

2. The cutting tool for machining turbine housings according to claim 1, characterized in that, The first cooling channel extends through the tool holder head, and the tool also includes a sealing member for sealing the openings at both ends of the first cooling channel.

3. The cutting tool for turbine housing machining according to claim 2, characterized in that, The sealing element is threadedly connected to the first cooling channel.

4. The cutting tool for machining turbine housings according to claim 1, characterized in that, Both the finishing blade and the roughing blade are provided with locking holes; both mounting slots are provided with blade mounting holes, and the first locking member passes through the locking hole and can be threadedly connected to the corresponding blade mounting hole.

5. The cutting tool for machining turbine housings according to claim 1, characterized in that, The effective locking depth of the first locking member is 1 to 1.5 times the thickness of the finishing blade and the roughing blade.

6. The cutting tool for machining turbine housings according to claim 1, characterized in that, One end of the cooling base is provided with a universal connecting sleeve, and the other end is provided with a threaded connecting post, which is threadedly connected to the tool holder head.

7. The cutting tool for turbine housing machining according to claim 6, characterized in that, One end of the cooling nozzle protrudes to form a universal rotating ball head, which cooperates with the universal connecting sleeve.

8. The cutting tool for machining turbine housings according to claim 1, characterized in that, The finishing insert and the roughing insert are symmetrically arranged with respect to the central axis of the tool holder.

9. The cutting tool for machining turbine housings according to claim 1, characterized in that, The cooling medium is either coolant or cold air.

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