A groove cutter for machining an annular groove of a turbocharger housing and a turbocharger housing

Abstract

The application discloses a groove cutter for machining a turbocharger shell annular groove and a turbocharger shell, the groove cutter comprising a first cutter body, a second cutter body and a cutting edge. The stable clamping of the first cutter body lays a foundation for machining precision, avoiding machining errors caused by clamping deviation; the design of the chip removal angle A and the support angle B of the second cutter body not only solves the problem of chip removal, but also enhances the strength of the groove cutter, reduces cutting heat and groove cutter deformation; the cutting edge comprises a straight edge section and a semicircular edge, which controls the cutting contact area, reduces the cutting force and vibration, and protects the edge. The joint action of these designs not only makes the machining precision of the annular groove meet the assembly and use requirements of the shell, but also improves the service life of the groove cutter, reduces the number and time of tool replacement, reduces the machining cost, improves the overall machining efficiency, and fully meets the batch production requirements of the new energy automobile turbocharger shell.

Description

Technical Field

[0001] This application relates to the field of machining grooving tools, and in particular to a grooving tool for machining annular grooves in turbocharger housings and a turbocharger housing. Background Technology

[0002] As a crucial component of automotive turbochargers, the turbocharger housing operates in a high-temperature, high-pressure, and corrosive environment. Therefore, turbocharger housings are typically made of materials with high strength, rigidity, and heat resistance, such as high-temperature alloys and heat-resistant stainless steel. These materials are typically difficult to machine. The challenging machining properties of turbocharger housing materials result in high cutting forces, difficult chip removal, and severe wear of the cutting tools during processing, leading to a short tool life and consequently high machining costs.

[0003] Traditional grooving cutters often employ a single-body structure without optimizing the collaborative design of the cutter body and cutting edge. On one hand, there's a lack of proper matching between the cutting edge length, the groove depth, and the fillet radius of the transition curve. This results in an excessively large contact area between the cutting edge and the housing material during machining, generating enormous cutting forces. Excessive cutting forces not only easily induce machining vibrations but also cause micro-chipping on the cutting edge, severely impacting the cutting edge's lifespan. On the other hand, the chip removal structure of existing grooving cutters is poorly designed. An effective chip removal angle is not formed between the cutter body side and the cutting edge side, making it difficult for chips to be smoothly discharged during cutting. A large amount of chips accumulate in the cutting area, causing intense friction with the cutter and workpiece surfaces, generating excessive cutting heat, and scratching the machined surface, reducing the surface quality of the annular groove. Excessive cutting heat can lead to plastic deformation wear of the grooving cutter, further shortening its lifespan. It can also cause thermal deformation of the housing material due to uneven heating, affecting the dimensional accuracy of the annular groove.

[0004] The aforementioned defects in the prior art ultimately lead to problems such as low processing efficiency, unstable processing quality, short tool life, and high tool replacement frequency in the machining process of the annular groove of the turbocharger housing.

[0005] Therefore, given the difficult machining characteristics of the annular groove in the turbocharger housing, there is an urgent need for a grooving tool design scheme that can optimize cutting force, improve chip removal, enhance the strength of the grooving tool, and adapt to the complex structure of the annular groove, in order to solve many pain points in the existing machining technology, improve the machining quality and efficiency of the annular groove, and reduce machining costs. Utility Model Content

[0006] This application provides a grooving tool for machining annular grooves in turbocharger housings and a turbocharger housing itself. This solution addresses the technical problems of low machining efficiency, unstable machining quality, short tool life, and high tool change frequency in traditional grooving processes. The technical solution is as follows:

[0007] On one hand, a grooving tool is provided for machining annular grooves in a turbocharger housing. The cross-section of the annular groove is an approximate V-shape with its opening perpendicular to the central axis of the turbocharger housing. The approximate V-shaped profile has a first side perpendicular to the central axis of the turbocharger housing, a second side forming a first angle C with the first side, and a transition curve connecting the first side and the second side. The radius of curvature of the transition curve at its maximum curvature is r. The groove depth of the annular groove is h. The grooving tool includes: a first tool body, cylindrical in shape, for clamping and positioning; a second tool body, fixedly connected to the front end of the first tool body and forming a second angle E with the first tool body, where E ≥ 90°; and a cutting edge, fixedly connected to the end of the second tool body. The total cutting edge length of the cutting edge is L. The cutting edge includes a straight cutting section and a semi-circular cutting edge located at the end of the straight cutting section. The cutting edge length of the straight cutting section is S, and the radius of curvature of the semi-circular cutting edge is R. L and R satisfy: L = S + R, L < h, and L = (1 ~ 2.5) × R; The straight cutting edge has a first front side and a first rear side that are parallel to each other, and both the first front side and the first rear side are parallel to the radial feed direction of the cutting edge; The second tool body has a second front side and a second rear side, the second front side is inclined rearward relative to the first front side, the second rear side is inclined rearward relative to the first rear side, and a chip removal angle A is formed between the second front side and the first front side, the chip removal angle A is in the range of 1°~5°; A support angle B is formed between the second rear side and the first rear side, the support angle B satisfies: B=C.

[0008] Optionally, the first cutter body, the second cutter body, and the cutting edge are integrally formed from the same material.

[0009] Optionally, the first blade and the second blade are separate structures and are connected by welding or fastening.

[0010] Optionally, the first included angle C ranges from 19° to 21°, and the support angle B ranges from 19° to 21°.

[0011] Optionally, the turbocharger housing is made of heat-resistant stainless steel.

[0012] The beneficial effects of the technical solutions provided in this application include at least the following:

[0013] A grooving tool for machining annular grooves in turbocharger housings includes a first tool body, a second tool body, and a cutting edge. The stable clamping of the first tool body lays the foundation for machining accuracy, avoiding machining errors caused by clamping deviations. The chip removal angle A and support angle B design of the second tool body solve the chip removal problem, enhance the strength of the grooving tool, and reduce cutting heat and tool deformation. The cutting edge includes a straight cutting edge and a semi-circular cutting edge, controlling the cutting contact area, reducing cutting force and vibration, and protecting the cutting edge. These designs work together to ensure that the machined annular groove meets the accuracy requirements for housing assembly and use, while also extending the grooving tool's lifespan, reducing the number and time of tool changes, lowering machining costs, and improving overall machining efficiency. This makes it perfectly suited to the mass production needs of turbocharger housings for new energy vehicles.

[0014] Secondly, a turbocharger housing is provided, wherein the annular groove is machined by the aforementioned grooving cutter. The beneficial effects of this are described in the above-mentioned beneficial effects of the grooving cutter used for machining the annular groove of the turbocharger housing, and will not be repeated here.

[0015] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic cross-sectional view of the annular groove in the turbocharger housing;

[0018] Figure 2 This is a schematic diagram of the structure of a traditional grooving cutter;

[0019] Figure 3 This is a schematic diagram of the grooving tool for machining annular grooves in a turbocharger housing, provided in an embodiment of this application.

[0020] Figure 4 This is a schematic diagram showing the shape and dimensions of a slotting tool for machining annular grooves in a turbocharger housing, provided in an embodiment of this application.

[0021] Explanation of reference numerals in the attached figures

[0022] 1-First cutter body; 2-Second cutter body; 21-Second front side; 22-Second rear side; 3-Cutting edge; 31-Straight cutting edge section; 311-First front side; 312-First rear side; 32-Semi-circular cutting edge; 9-Annular groove; 91-First side; 92-Second side; 93-Transition curve section. Detailed Implementation

[0023] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0024] In this disclosure, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the relative positions of the corresponding components in the direction of gravity when they are in use, and "inner" and "outer" refer to their relative positions to the contours of the corresponding components themselves. Furthermore, the terms "first," "second," etc., used in this disclosure are for distinguishing one element from another and do not have sequential or importance implications. In the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings denote the same or similar elements.

[0025] According to the embodiments of this application, refer to Figure 1 As shown, Figure 1 This is a cross-sectional schematic diagram of the annular groove 9 in a turbocharger housing. In the field of automotive turbocharger housing machining, the annular groove 9 is a key structure on the housing that achieves sealing, positioning, or airflow guiding functions, and its machining quality directly determines the overall performance of the housing. The grooving cutter used to machine the annular groove 9 in the turbocharger housing needs to be precisely matched with the structural characteristics of the annular groove 9 and the machining requirements of the housing material. Its operation involves multiple stages, including the adaptation of the structural parameters of the annular groove 9, the synergistic effect of the various components of the grooving cutter, and the actual cutting process, ultimately achieving high-quality machining and solving traditional machining problems.

[0026] The cross-section of the annular groove 9 in the turbocharger housing is approximately V-shaped, with its opening perpendicular to the central axis of the turbocharger housing. This structural design is to accommodate subsequent seal installation or other assembly requirements. The approximately V-shaped profile includes a first side 91, a second side 92, and a transition curve 93. The first side 91 remains perpendicular to the central axis of the turbocharger housing, the second side 92 forms a first angle C with the first side 91, and the transition curve 93 connects the first side 91 and the second side 92. Its radius of curvature at the point of maximum curvature is r. This radius design avoids stress concentration within the groove and facilitates a smooth transition of the cutting tool during the cutting process. Furthermore, the groove depth of the annular groove 9 is h.

[0027] refer to Figure 2 , Figure 2This is a schematic diagram of a traditional grooving cutter. Traditional grooving cutters mostly adopt a single body-shaped structure, without optimizing the collaborative design of the cutter body and the cutting edge 3. On the one hand, there is a lack of reasonable adaptation between the cutting edge length 3 and the groove depth 9 of the annular groove and the fillet radius of the transition curve 93, resulting in an excessively large contact area between the cutting edge 3 and the shell material during machining, thus generating huge cutting forces. Excessive cutting forces not only easily cause machining vibrations but also lead to micro-chipping of the grooving cutter edge, seriously affecting the service life of the cutting edge 3. On the other hand, the chip removal structure design of existing grooving cutters is unreasonable. An effective chip removal angle is not formed between the side of the cutter body and the side of the cutting edge 3, making it difficult for the chips generated during cutting to be smoothly discharged. A large amount of chips accumulate in the cutting area, which not only causes severe friction with the grooving cutter and workpiece surface, generating excessive cutting heat, but also scratches the machined surface, reducing the surface quality of the annular groove 9. Excessive cutting heat can cause plastic deformation wear of the grooving cutter, further shortening the grooving cutter life, and may also cause thermal deformation of the shell material due to uneven heating, affecting the dimensional accuracy of the annular groove 9.

[0028] Regarding the structure of the annular groove 9, the grooving tool provided in this application embodiment achieves precise machining through the collaboration of multiple components. The design and operation of each component are all centered around reducing cutting force, optimizing chip removal, and enhancing the strength of the grooving tool.

[0029] According to a first aspect of this application, a grooving tool is provided for machining annular grooves 9 in a turbocharger housing. (Reference) Figure 3 and Figure 4 The first cutter body 1 of the grooving cutter is cylindrical, and the core purpose of this design is to achieve stable clamping and positioning. Before machining, the first cutter body 1 needs to be clamped in the tool holder or chuck of the CNC machining equipment. The cylindrical structure ensures coaxiality during clamping and avoids deviation of the grooving cutter's movement trajectory during subsequent cutting due to clamping eccentricity, which would lead to deviation in the positional accuracy of the annular groove 9. After clamping, the first cutter body 1 stably transmits the power and motion of the equipment to subsequent components, providing a reliable foundation for the entire cutting process.

[0030] The second cutter body 2, fixedly connected to the front end of the first cutter body 1, forms a second included angle E with the first cutter body 1, where E ≥ 90°. This included angle must be closely related to the first included angle C of the annular groove 9 to ensure that the subsequent cutting edge 3 can accurately fit the tilt angle of the second side 92. The straight cutting edge section 31 has a first front side 311 and a first rear side 312 that are parallel to each other, and both the first front side 311 and the first rear side 312 are parallel to the radial feed direction of the cutting edge 3. The second cutter body 2 also has a second front side 21 and a second rear side 22, wherein the second front side 21 is tilted backward relative to the first front side 311 of the cutting edge 3 to form a chip removal angle A, the value range of which is set to 1°~5°. This angle range is derived based on the characteristics of the housing material. Since turbocharger housings are mostly made of heat-resistant stainless steel, the chips produced during cutting are hard and tough. If the chip removal angle is too small, the chips tend to accumulate in the cutting area, causing additional friction between the chips and the grooving tool and workpiece, increasing cutting force and heat. If the chip removal angle is too large, it will weaken the structural strength of the second tool body 2 and cause machining vibration. A chip removal angle of 1° to 5° provides sufficient space for chip removal, allowing the chips to be smoothly discharged along the second front side 21, while maintaining the structural integrity of the second tool body 2. At the same time, the second rear side 22 is inclined backward relative to the first rear side 312 of the cutting edge 3, forming a support angle B. This design can increase the support area and structural thickness of the second tool body 2, disperse the impact of cutting force on the grooving tool, and avoid tool body deformation or damage due to local stress concentration. Furthermore, the support angle B satisfies B=C. This is because the presence of the straight cutting section 31 causes the support angle of the traditional grooving cutter to shift towards the side closer to the second cutter body 2, thereby avoiding contact with the inner wall of the annular groove 9.

[0031] The cutting edge 3, located at the end of the second cutter body 2, is the core component that directly participates in cutting. Its total cutting edge length is L, and it consists of a straight cutting edge 31 and a semi-circular cutting edge 32. The cutting edge length of the straight cutting edge 31 is S, and the radius of the rounded corner of the semi-circular cutting edge 32 is R. The three satisfy the relationship L=S+R, L<h, and L=(1~2.5)×R. The design of L<h ensures that the cutting edge 3 can fully extend into the annular groove 9 to machine to the bottom of the groove, while avoiding interference between the excessively long cutting edge and the non-machined surface of the groove. The ratio of L=(1~2.5)×R is to control the cutting contact area. Since the shell material is difficult to machine, an excessively large contact area will cause a sharp increase in cutting force, resulting in grooving tool vibration and micro-chipping of the cutting edge. This ratio can control the depth of cut each time within the range of L, reducing the cutting load per unit time. In addition, the first front side 311 and the first rear side 312 of the straight cutting section 31 are parallel to each other and both are parallel to the radial feed direction of the cutting edge 3. This parallel design can ensure that the cutting direction is consistent with the feed direction, avoid the deviation of the cutting force direction due to the side tilt, and further improve the cutting stability.

[0032] In actual machining operations, the L and R values ​​of the cutting edge 3, as well as the support angle B and the second included angle E, must first be determined based on parameters such as the groove depth h and the first included angle C of the annular groove 9 to ensure that the grooving tool is fully compatible with the structure of the annular groove 9. Then, the first tool body 1 is clamped onto the spindle of the CNC machining equipment, and a tool setting operation is performed to determine the tool tip position, ensuring that the grooving tool's movement trajectory accurately corresponds to the position of the annular groove 9. After starting the equipment, the spindle drives the workpiece to rotate, while the grooving tool feeds radially. At this time, the semi-circular cutting edge 32 first contacts the machined surface of the housing. The arc-shaped contact method can reduce the instantaneous impact force at the beginning of cutting, protecting the cutting edge from chipping. As the feed advances, the straight cutting edge 31 gradually participates in cutting. Because its side is parallel to the feed direction and the total cutting length is controlled within a reasonable range, the cutting contact area is stable, and the cutting force remains at a low level. The chips generated during the cutting process are discharged along the second front side 21 under the action of the chip removal angle A, avoiding accumulation and frictional heat generation; the second cutter body 2, which is reinforced by the support angle B, stably bears the cutting force, ensuring that the grooving tool has no obvious deformation, the machined first side 91 maintains the perpendicularity accuracy with the central axis of the housing, the included angle between the second side 92 and the first side 91 precisely matches the first included angle C, and the radius of curvature r of the transition curve part 93 is also guaranteed by the machining of the semi-circular cutting edge 32.

[0033] From an application perspective, this grooving tool effectively addresses the pain points of traditional machining by addressing the characteristics of difficult-to-machine materials for turbocharger housings through multi-dimensional design. The stable clamping of the first tool body 1 lays the foundation for machining accuracy, avoiding machining errors caused by clamping deviations. The chip removal angle A and support angle B design of the second tool body 2 not only solve the chip removal problem but also enhance the strength of the grooving tool, reducing cutting heat and tool deformation. The cutting edge 3, including a straight cutting edge 31 and a semi-circular cutting edge 32, controls the cutting contact area, reduces cutting force and vibration, and protects the cutting edge. These designs work together to ensure that the machined annular groove meets the accuracy requirements for housing assembly and use, while also extending the grooving tool's lifespan, reducing tool change frequency and time, lowering machining costs, and improving overall machining efficiency. This makes it perfectly suited to the mass production needs of turbocharger housings for new energy vehicles.

[0034] According to the embodiments of this application, in the machining of the annular groove 9 of the turbocharger housing, the structural integrity and material consistency of the grooving cutter have a critical impact on machining accuracy and service life. The grooving cutter involved here has its first cutter body 1, second cutter body 2, and cutting edge 3 integrally manufactured from the same material. This manufacturing method optimizes the overall performance of the grooving cutter by eliminating connection gaps and performance differences between components. Its operation process needs to be described in detail from aspects such as material selection, forming process, machining adaptation, and actual application effects.

[0035] First, material selection must closely match the machining requirements of the turbocharger housing. Since the housing material is mostly heat-resistant stainless steel, this type of material generates significant cutting forces and high cutting heat during machining. Therefore, the grooving tool material must possess high strength, high hardness, high heat resistance, and good wear resistance. Typically, cemented carbide or high-performance high-speed steel is chosen as the base material for integral molding. For example, cemented carbide not only has excellent hardness and strength at room temperature but also maintains good mechanical properties at high temperatures, effectively resisting damage to the grooving tool from cutting heat. Simultaneously, its good wear resistance extends the service life of the grooving tool when machining difficult-to-machine materials, preventing a decrease in machining accuracy due to rapid material wear.

[0036] The one-piece molding manufacturing process is the core link to ensure the performance of the grooving tool. The process requires multiple precision steps to ensure the accuracy of each technical feature.

[0037] During the machining process, the advantages of the integrated structure are first reflected in the clamping stage. Since the first tool body 1, the second tool body 2, and the cutting edge 3 are an integral structure without any connecting joints, when the first tool body 1 is clamped on the spindle of the CNC machining equipment, its coaxiality can be directly transmitted to the second tool body 2 and the cutting edge 3, without worrying about the coaxiality deviation that may occur when the parts are connected separately.

[0038] During the cutting stage, the uniformity of the same material ensures that the mechanical properties and heat resistance of all parts of the grooving tool remain consistent. When the cutting edge 3 processes the high-temperature alloy shell, all parts of the grooving tool can withstand the high temperature together, preventing localized thermal deformation due to differences in the heat resistance of different materials. Simultaneously, the cutting force is transmitted through the straight cutting edge 31 to the second tool body 2, and then smoothly to the first tool body 1. Due to the uniformity of the material, there is no significant stress concentration during force transmission, preventing the second tool body 2 from bending or breaking due to insufficient local strength. Furthermore, the one-piece molding structure completely eliminates the potential for gaps and loosening that may exist in separate connections.

[0039] According to the embodiments of this application, in the machining of the annular groove 9 of the turbocharger housing, the structural design of the grooving cutter needs to take into account both performance requirements and cost control. The split-type grooving cutter achieves optimized selection and partial replacement of materials in different parts by adopting a split design for the first cutter body 1 and the second cutter body 2 and connecting them by welding or fastening. Its operation process needs to be described in detail from the aspects of material selection, connection process, machining adaptation and practical application advantages, so as to fully reflect the characteristics of this structure in terms of flexibility and economy.

[0040] Firstly, the core advantage of the split structure lies in the differentiated selection of materials. The optimal material can be chosen based on the different functional requirements of the first cutting body 1 and the second cutting body 2, reducing costs while ensuring performance. The main function of the first cutting body 1 is clamping, positioning, and motion transmission; it does not directly participate in cutting. Therefore, it does not need extremely high heat resistance and wear resistance, only sufficient rigidity and clamping adaptability. Typically, 45# steel or alloy structural steel is chosen as the material for the first cutting body 1. These materials have good mechanical and machinability, sufficient to withstand the force transmission requirements during cutting, and their cost is only 1 / 5 to 1 / 10 of that of cemented carbide, significantly reducing the overall material cost of the grooving tool. The second cutting body 2, on the other hand, needs to directly support the cutting edge 3 and withstand cutting forces and heat, while also forming the chip removal angle A and support angle B. Therefore, high-strength, high-heat-resistant, and high-wear-resistant materials, such as cemented carbide or high-speed steel, are required. Regarding the connection process, welding and fastening methods must be selected based on actual machining requirements and the frequency of grooving tool maintenance, and both must ensure the accuracy and strength of the connection.

[0041] From an application perspective, the split-type grooving cutter has significant advantages in cost control, maintenance convenience, and design flexibility. Regarding cost control, the differentiated selection of materials significantly reduces the overall manufacturing cost of the grooving cutter, especially for manufacturers using grooving cutters in bulk, resulting in substantial savings on long-term procurement costs. The partial replacement maintenance method also reduces the amount of scrapped grooving cutters, minimizing resource waste. In terms of maintenance convenience, partial replacement eliminates the need for complex clamping and adjustment; replacing a second cutter body typically takes less than 30 minutes, while replacing and adjusting a one-piece grooving cutter requires 1-2 hours, significantly reducing maintenance time and improving equipment utilization.

[0042] In terms of design flexibility, the split structure can quickly adapt to the machining requirements of annular grooves 9 of different specifications. When it is necessary to machine annular grooves 9 with different groove depths h or different first included angles C, only the corresponding second cutter body 2 needs to be replaced (adjusting parameters such as L, R, A, B, E, etc.), while the first cutter body 1 can be used universally. There is no need to redesign and manufacture the entire groove cutter, reducing the types and quantities of groove cutters in stock. For example, for two types of annular grooves 9 with groove depths of 8.5mm and 9.6mm, only two types of second cutter bodies 2 need to be designed separately, while sharing one type of first cutter body 1, which can meet the machining requirements, reducing inventory costs and design cycle.

[0043] According to the embodiments of this application, refer to Figure 3 and Figure 4As shown, in the machining of the annular groove 9 of the turbocharger housing, the angle design of the grooving cutter is the key to ensuring the accuracy of the annular groove 9. The correlation design between the second included angle E and the first included angle establishes a precise correspondence between the structural angle of the grooving cutter and the structural angle of the annular groove 9, thereby achieving precise machining of the annular groove 9 by the cutting edge 3. The operation process needs to be explained in detail from the aspects of the derivation of the angle correlation, the precision control of the grooving cutter manufacturing, the adaptability of the machining process, and the application effect, so as to fully demonstrate the necessity and advantages of this correlation design.

[0044] First, it is necessary to clarify the specific meaning of the first included angle. The first included angle is the angle C between the first side 91 and the second side 92 of the annular groove 9. This included angle is a key parameter pre-designed based on the assembly requirements and structural strength of the turbocharger housing. For example, when the annular groove 9 is used to install a V-shaped sealing ring, in order to ensure that the sealing ring can fit tightly against the groove wall to achieve effective sealing, and at the same time facilitate the installation and removal of the sealing ring, the first included angle C is usually set to 19°~21°, and the support angle B is also set to 19°~21°. The support angle B is the angle between the second rear side 22 of the second cutter body 2 and the first rear side 312 of the cutting edge 3. Its design must take into account the strength of the grooved cutter and the angle of the annular groove 9 to ensure that the second cutter body 2 can provide sufficient support for the cutting edge 3.

[0045] During the machining process, the advantages of angle-related design are first reflected in the parameter adaptation stage before machining. When receiving orders for machining annular grooves 9 of turbocharger housings of different specifications, the values ​​of B and E can be quickly derived based on the first included angle C of the annular groove 9 provided by the customer, without the need for complex angle calculations and verifications.

[0046] During the clamping stage, the grooving cutter is clamped to the spindle of the equipment via the first cutter body 1. Since the angle E is precisely correlated with the angle C of the annular groove 9, there is no need to frequently adjust the angle position of the grooving cutter after clamping; only a routine tool setting operation is required. After tool setting is completed, the CNC equipment can drive the grooving cutter to move according to the preset machining program, reducing the number of trial cuts during the debugging process and reducing the number of scrap parts from trial cuts.

[0047] For example, in Embodiment 1: the annular groove 9 of the turbocharger housing has a depth of 8.5 mm and a width of 6 mm. Using the grooving cutter design concept proposed in this application embodiment, the dimensions of the grooving cutter can be designed as follows:

[0048] The radius R of the semi-circular cutting edge 32 is 2mm, the total cutting length L is 2.5mm, the chip removal angle A is 3°, and the support angle B is 19°.

[0049] Example 2: The V-belt groove of the turbocharger housing has a depth of 9.6 mm and a width of 7.5 mm. Using the grooving cutter design concept proposed in this application, the dimensions of the grooving cutter can be designed as follows:

[0050] The radius R of the semi-circular cutting edge 32 is 1.5mm, the total cutting length L is 3.3mm, the chip removal angle A is 4°, and the support angle B is 19°.

[0051] According to a second aspect of this application, a turbocharger housing is provided, wherein the annular groove 9 is machined by the aforementioned grooving tool.

[0052] The beneficial effects of the technical solutions provided in this application are similar to the beneficial effects of the grooving tool used to process the annular groove 9 of the turbocharger housing, and will not be repeated here.

[0053] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0054] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0055] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A grooving tool for machining annular grooves in a turbocharger housing, wherein the cross-section of the annular groove (9) is approximately V-shaped with its opening perpendicular to the central axis of the turbocharger housing, the approximately V-shaped profile having a first side (91) perpendicular to the central axis of the turbocharger housing, a second side (92) forming a first angle C with the first side (91), and a transition curve portion (93) connecting the first side (91) and the second side (92), wherein the radius of curvature of the transition curve portion (93) at its maximum curvature is r, and the groove depth of the annular groove (9) is h, characterized in that, The grooving cutter includes: The first blade (1) is cylindrical in shape and is used for clamping and positioning. The second blade (2) is fixedly connected to the front end of the first blade (1) and forms a second included angle E with the first blade (1), where E ≥ 90°; The cutting edge (3) is fixedly connected to the end of the second cutter body (2). The total cutting edge length of the cutting edge (3) is L. The cutting edge (3) includes a straight cutting edge (31) and a semi-circular cutting edge (32) located at the end of the straight cutting edge (31). The cutting edge length of the straight cutting edge (31) is S, and the radius of the rounded corner of the semi-circular cutting edge (32) is R. L and R satisfy: L = S + R, L < h, and L = (1~2.5) × R; The straight cutting edge (31) has a first front side (311) and a first rear side (312) that are parallel to each other, and both the first front side (311) and the first rear side (312) are parallel to the radial feed direction of the cutting edge (3); The second blade (2) has a second front side (21) and a second rear side (22). The second front side (21) is inclined backward relative to the first front side (311), and the second rear side (22) is inclined backward relative to the first rear side (312). A chip removal angle A is formed between the second front side (21) and the first front side (311), and the chip removal angle A is in the range of 1° to 5°. A support angle B is formed between the second rear side (22) and the first rear side (312), and the support angle B satisfies: B=C.

2. The grooving tool for machining annular grooves in turbocharger housings according to claim 1, characterized in that, The first cutter body (1), the second cutter body (2) and the cutting edge (3) are made of the same material in one piece.

3. The grooving tool for machining annular grooves in turbocharger housings according to claim 1, characterized in that, The first blade (1) and the second blade (2) are separate structures and are connected by welding or fastening.

4. The grooving tool for machining annular grooves in turbocharger housings according to claim 1, characterized in that, The first included angle C ranges from 19° to 21°, and the support angle B ranges from 19° to 21°.

5. The grooving tool for machining annular grooves in turbocharger housings according to claim 1, characterized in that, The turbocharger housing is made of heat-resistant stainless steel.

6. A turbocharger housing, characterized in that, Its annular groove (9) is machined by a groove cutter used for machining annular grooves of turbocharger housings as described in any one of claims 1 to 5.

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