Annular groove machining cutter

Abstract

The utility model relates to the technical field of machining, and discloses an annular groove machining cutter which comprises a cutter body, the length direction of the cutter body is a first direction, the width direction of the cutter body is a second direction, the thickness direction of the cutter body is a third direction, and the cutter body is provided with an upper end face and a lower end face which are arranged in the third direction. The knife body is further provided with a first side face and a second side face which are arranged in the second direction. The tool bit is arranged at one end of the tool body, the tool bit and the tool body are arranged in the first direction, the tool bit comprises a cutting face, and a cutting edge is arranged at the edge of the end, away from the tool body, of the cutting face; the distance between the cutting face and the lower end face is gradually reduced in the direction from the first side face to the second side face. According to the annular groove machining tool, during cutting, the width of cut waste chips is larger than that of the finally formed annular groove, and therefore the situation that the waste chips are clamped in the annular groove can be effectively reduced, and the follow-up assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a ring groove processing tool. Background Art

[0002] Cutting is a common machining method, which usually uses a tool to cut on the machined surface to form a workpiece with size and shape that meets the requirements.

[0003] However, if an annular groove needs to be machined in the hole, the waste chips cut off are of the same width as the annular groove and the waste chips often get stuck in the annular groove. Since the annular groove is formed in the hole, it is not easy to clean and is likely to affect subsequent assembly.

[0004] Therefore, how to reduce the situation where waste chips get stuck in the annular groove when adding the annular groove in the hole has become a technical problem that needs to be solved urgently in this field. Utility Model Content

[0005] The purpose of the utility model is to at least reduce the situation where waste chips are stuck in the annular groove when the annular groove is added in the hole, and this purpose is achieved through the following technical solutions:

[0006] In the first aspect, the utility model proposes an annular groove processing tool, which includes: a blade body, wherein the length direction of the blade body is a first direction, the width direction of the blade body is a second direction, and the thickness direction of the blade body is a third direction, the blade body has an upper end face and a lower end face arranged along the third direction, and the blade body also has a first side face and a second side face arranged along the second direction; and a blade head, which is arranged at one end of the blade body, the blade head and the blade body are arranged along the first direction, the blade head includes a cutting surface, and the cutting surface has a cutting edge at the edge away from one end of the blade body; along the direction from the first side face to the second side face, the distance between the cutting surface and the lower end face gradually decreases.

[0007] When machining an annular groove in a hole, the annular groove machining tool is inserted deep into the hole, and the extension direction of the blade is parallel to the radial direction of the machined hole, so that the cutting edge on the cutting surface contacts the machined surface as a whole, and then the cutting surface and the machined surface are relatively rotated for cutting, so as to finally machine the annular groove. Since the distance between the cutting surface and the lower end surface gradually decreases along the direction from the first side surface to the second side surface, it means that the plane where the cutting surface is located and the plane where the lower end surface is located are not in the same plane, that is, the cutting surface is an inclined surface, and when the cutting edge is cutting the machined surface, the length of the cutting edge is greater than the width of the groove formed by the cutting edge, that is, the width of the waste chips cut is greater than the width of the finally formed annular groove, therefore, it can effectively reduce the occurrence of waste chips stuck in the annular groove, thereby improving the subsequent assembly efficiency.

[0008] In some embodiments of the present invention, a chip breaker groove is provided between the cutting surface and the upper end surface, and the chip breaker groove extends along the second direction and is recessed along the third direction.

[0009] In some embodiments of the present invention, the acute angle formed between the extension direction of the cutting edge and the plane where the upper end surface is located is a set angle, and the set angle is 3°-10°.

[0010] In some embodiments of the present invention, the angle is set to 5°.

[0011] In some embodiments of the present invention, along the direction from the cutter head to the cutter body, the distance between the cutting surface and the lower end surface gradually decreases.

[0012] In some embodiments of the utility model, the cutter head also includes an auxiliary surface, which is located at an end of the cutter head away from the blade body along the first direction; the auxiliary surface includes a first surface and a second surface arranged along a third direction, and the combination of the first surface and the cutting surface constitutes a cutting edge.

[0013] In some embodiments of the present invention, the angle between the first surface and the plane where the cutting surface is located constitutes a first acute angle, the angle between the second surface and the plane where the cutting surface is located constitutes a second acute angle, and the first acute angle is greater than the second acute angle.

[0014] In some embodiments of the present invention, along the third direction, the extension length of the first surface is 0.3 mm-1 mm.

[0015] In some embodiments of the present invention, along the third direction, an extension length of the first surface is 0.5 mm.

[0016] In some embodiments of the utility model, along the extension direction of the cutting edge, each end of the cutting edge has a convex chamfering edge, and the convex chamfering edge is used to process the chamfer inside the annular groove; along the first direction, two concave chamfering edges are provided between the cutting edge and the chip breaker groove, and the two concave chamfering edges are arranged along the second direction and are respectively located at the two ends of the cutter head, and the concave chamfering edges are used to process the chamfer formed at the connection between the annular groove and the outer surface of the machined surface.

[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0019] Figure 1 A schematic diagram of the structure of the annular groove machining tool provided by an embodiment of the utility model at a viewing angle;

[0020] Figure 2 A schematic structural diagram of the annular groove machining tool provided by an embodiment of the utility model from another perspective;

[0021] Figure 3 A schematic diagram of the structure of the annular groove machining tool provided by an embodiment of the utility model at another viewing angle;

[0022] Figure 4 A structural cross-sectional view of an annular groove machined by an annular groove machining tool provided by an embodiment of the utility model;

[0023] Figure 5 for Figure 1 Enlarged view of point A in the middle.

[0024] The reference numerals are as follows:

[0025] 100. Annular groove processing tool;

[0026] 1. blade; 11. upper end surface; 12. lower end surface; 13. first side surface; 14. second side surface;

[0027] 2. Cutter head; 21. Cutting surface; 211. Cutting edge; 2111. Convex chamfered edge; 22. Auxiliary surface; 221. First surface; 222. Second surface;

[0028] 3. Chip breaker;

[0029] 4. Concave chamfered edge;

[0030] 200, processed surface;

[0031] 5. Annular groove; 51. Inner chamfer; 52. Outer chamfer. DETAILED DESCRIPTION

[0032] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0033] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0034] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0035] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0036] When machining annular grooves in a production workshop, a common method is to use a tool to cut the machined surface, and utilize the relative rotation of the tool and the machined surface to form an annular groove on the machined surface.

[0037] However, when the annular groove to be processed is in a hole, for example, when processing the sealing ring groove at the spark plug bushing mounting hole of the cylinder head, it is necessary to insert the tool into the spark plug bushing mounting hole for cutting. The iron chips cut off are of the same width as the annular groove, and the iron chips are often stuck in the annular groove. Since the annular groove is formed in the spark plug bushing mounting hole, it is not convenient to clean; the iron chips remaining in the annular groove will affect the subsequent assembly of the sealing ring and even affect the sealing performance of the sealing ring.

[0038] Based on the above considerations, in order to reduce the situation where waste chips get stuck in the annular groove when adding annular grooves in holes, the present application designs an annular groove processing tool. This annular groove processing tool includes an inclined cutting surface, which can make the width of the waste chips cut off larger than the width of the annular groove finally formed. Therefore, it can effectively reduce the occurrence of waste chips getting stuck in the annular groove, thereby improving the subsequent assembly efficiency. When the processed annular groove is a sealing ring groove, it also effectively guarantees the sealing performance of the sealing ring subsequently installed in the sealing ring groove.

[0039] Figure 1 A schematic diagram of the structure of the annular groove machining tool provided by an embodiment of the utility model at a viewing angle; Figure 2 A schematic structural diagram of the annular groove machining tool provided by an embodiment of the utility model from another perspective; Figure 3 A schematic diagram of the structure of the annular groove machining tool provided by an embodiment of the utility model at another viewing angle; Figure 4 This is a structural cross-sectional view of an annular groove machined by the annular groove machining tool provided by the embodiment of the utility model. Figure 1-Figure 4 The embodiment of the present application provides a ring groove processing tool 100, which includes: a blade body 1, wherein the length direction of the blade body 1 is a first direction, the width direction of the blade body 1 is a second direction, and the thickness direction of the blade body 1 is a third direction. The blade body 1 has an upper end face 11 and a lower end face 12 arranged along the third direction, and the blade body 1 also has a first side face 13 and a second side face 14 arranged along the second direction; and a cutter head 2, which is arranged at one end of the blade body 1, and the cutter head 2 and the blade body 1 are arranged along the first direction. The cutter head 2 includes a cutting surface 21, and the cutting surface 21 has a cutting edge 211 at the edge away from one end of the blade body 1; along the direction from the first side face 13 to the second side face 14, the distance between the cutting surface 21 and the lower end face 12 gradually decreases.

[0040] In this embodiment, when the annular groove machining tool 100 is used to machine the annular groove 5 in the hole, the annular groove machining tool 100 is inserted into the hole, the extension direction of the blade body 1 is parallel to the radial direction of the machined hole, the cutting edge 211 on the cutting surface 21 is in contact with the machined surface 200 as a whole, and then the cutting surface 21 and the machined surface 200 are relatively rotated for cutting, so as to finally machine the annular groove 5. Since the distance between the cutting surface 21 and the lower end surface 12 gradually decreases along the direction from the first side surface 13 to the second side surface 14, it means that the plane where the cutting surface 21 is located and the plane where the lower end surface 12 is located are not in the same plane, that is, the cutting surface 21 is an inclined surface, and when the cutting edge 211 is cutting the machined surface 200, the length of the cutting edge 211 is greater than the width of the groove formed by the cutting edge 211, that is, the width of the waste chips cut is greater than the width of the annular groove 5 finally formed.

[0041] During cutting, the annular groove processing tool 100 can be installed on a clamping device (such as a CNC machine tool, etc.), and then the workpiece being processed or the annular groove 5 processing tool can be rotated to achieve relative rotation between the cutting surface 21 and the processed surface 200, so that the annular groove 5 can be finally processed on the processed surface 200.

[0042] Therefore, the annular groove machining tool 100 provided in this embodiment can effectively reduce the occurrence of waste chips getting stuck in the annular groove 5, thereby improving the subsequent assembly efficiency.

[0043] It should be noted that the annular groove machining tool 100 provided in this embodiment is not only suitable for machining the annular groove 5 in a hole or cavity, but is also applicable if the machined surface 200 is the outer surface of a workpiece.

[0044] refer to Figure 1 and Figure 2 According to an optional embodiment of the present application, a chip breaker groove 3 is provided between the cutting surface 21 and the upper end surface 11, and the chip breaker groove 3 extends along the second direction and is recessed along the third direction.

[0045] In this embodiment, the chip breaker groove 3 can cooperate with the cutting surface 21 during cutting to break the waste chips cut from the machined surface 200, thereby avoiding the phenomenon that the waste chips are too long and affect the cutting process and thus affect the quality of the annular groove 5.

[0046] like Figure 3 As shown, according to an optional embodiment of the present application, the acute angle formed between the extension direction of the cutting edge 211 and the plane where the upper end surface 11 is located is a set angle, and the set angle is 3°-10°, that is, Figure 3 ∠α=3°-10°.

[0047] In this embodiment, for the convenience of description in conjunction with the accompanying drawings, an annular groove processing tool 100 in which the upper end face 11 and the lower end face 12 are parallel is taken as an example for explanation. From the above description, it can be seen that the plane where the cutting surface 21 is located and the plane where the lower end face 12 is located are not in the same plane. Then, when the upper end face 11 and the lower end face 12 are parallel, the cutting surface 21 and the plane where the upper end face 11 are located are not in the same plane.

[0048] The reason why the acute angle formed between the extension direction of the cutting edge 211 and the plane where the upper end face 11 is located is in the range of 3°-10° is that if the angle is set too large, the length of the cutting edge 211 will be very long while ensuring that the annular groove 5 has a certain width, which is not convenient for manufacturing the cutting edge 211 and also occupies too much cutting space. Therefore, the acute angle formed between the extension direction of the cutting edge 211 and the plane where the upper end face 11 is located is in the range of 3°-10°. For example, after experimental verification, the setting angle can be set to 5°, that is, Figure 3 ∠α=5°, which not only ensures that the length of the cutting edge 211 is greater than the width of the groove formed by the cutting edge 211, but also simplifies the process and saves cutting space.

[0049] like Figure 2 As shown, according to an optional embodiment of the present application, along the direction from the cutter head 2 to the blade body 1 , the distance between the cutting surface 21 and the lower end surface 12 gradually decreases.

[0050] In this embodiment, since the annular groove 5 needs to be processed to different depths according to different working conditions while ensuring the width, the cutting edge 211 and the machined surface 200 also need to move relative to each other along the radial direction of the machined hole, that is, the cutting edge 211 cuts deeper and deeper on the machined surface 200. In this embodiment, a most protruding sharp edge is arranged on the cutting surface 21, that is, along the direction of the cutter head 2 pointing to the blade body 1, the distance between the cutting surface 21 and the lower end surface 12 gradually decreases. Since the distance between the cutting surface 21 and the lower end surface 12 gradually decreases along the direction of the first side surface 13 pointing to the second side surface 14, the cutting edge 211 forms the above-mentioned sharp edge at one end close to the first side surface 13; when starting to cut, the sharp edge first contacts the machined surface 200, and as the cutting proceeds, the entire cutting edge 211 gradually contacts the machined surface 200; when the depth of the annular groove 5 is deepened, that is, when the cutting edge 211 and the machined surface produce relative movement along the radial direction of the machined hole, the sharp edge part first contacts the machined surface 200, which increases the pressure during cutting and reduces the contact area between the cutting edge 211 and the machined surface 200, thereby reducing the vibration generated during cutting and ensuring the machining quality of the annular groove 5.

[0051] Therefore, this arrangement of the present embodiment can reduce the vibration during cutting, thereby reducing the occurrence of the undesirable phenomenon that abnormal stress occurs on the surface of the processed surface 200 due to excessive vibration during cutting.

[0052] Figure 5 for Figure 1 Enlarged view of point A in the middle, for reference Figure 1 , Figure 3 and Figure 5 According to an optional embodiment of the present application, the cutter head 2 further comprises an auxiliary surface 22. Along the first direction, the auxiliary surface 22 is located at the end of the cutter head 2 away from the blade body 1; the auxiliary surface 22 comprises a first surface 221 and a second surface 222 arranged along the third direction, and the junction of the first surface 221 and the cutting surface 21 constitutes a cutting edge 211. The angle between the first surface 221 and the plane where the cutting surface 21 is located constitutes a first acute angle, that is, Figure 5 The angle between the second surface 222 and the plane where the cutting surface 21 is located constitutes a second acute angle, that is, Figure 5 ∠b in the figure; the first acute angle is greater than the second acute angle, that is, ∠a>∠b.

[0053] In this embodiment, since the angle between the first surface 221 and the cutting surface 21 constitutes a first acute angle, the sharpness of the cutting edge 211 can be enhanced to better achieve the cutting of the processed surface 200; and the setting of the second surface 222, since the first acute angle is greater than the second acute angle, the second surface 222 can achieve the improvement of the sharpness of the cutting edge 211, and also support the cutting edge 211, thereby improving the strength of the cutting edge 211 during cutting, and effectively reducing the occurrence of the cutting edge 211 chipping phenomenon during cutting.

[0054] refer to Figure 1 According to an optional embodiment of the present application, along the third direction, the extension length of the first surface 221 is 0.3mm-1mm, that is, Figure 1 Medium H = 0.3mm-1mm.

[0055] In this embodiment, as mentioned above, the purpose of setting the first surface 221 is to improve the sharpness of the cutting edge 211. However, if the extension length of the first surface 221 along the third direction is too long, even with the support and protection of the second surface 222, the cutting edge 211 is still prone to chipping due to being too sharp during cutting. Therefore, the extension length of the first surface 221 is set to 0.3mm-1mm. After experimental verification, the extension length of the first surface 221 is set to 0.5mm, that is, Figure 1 In the middle, H=0.5 mm. The first surface 221 of this size can improve the sharpness of the cutting edge 211 without causing the cutting edge 211 to collapse during cutting.

[0056] refer to Figure 2 and Figure 4 According to an optional embodiment of the present application, along the extension direction of the cutting edge 211, the two ends of the cutting edge 211 each have a convex chamfering edge 2111, and the convex chamfering edge 2111 is used to process the chamfer inside the annular groove 5; along the first direction, two concave chamfering edges 4 are provided between the cutting edge 211 and the chip breaker groove 3, and the two concave chamfering edges 4 are arranged along the second direction and are respectively located at the two ends of the cutter head 2, and the concave chamfering edges 4 are used to process the chamfer formed at the connection between the annular groove 5 and the outer surface of the machined surface 200.

[0057] In this embodiment, the annular groove 5 is also taken as an example when it is a sealing ring groove at the spark plug bushing mounting hole of the cylinder head. Since a sealing ring needs to be installed in the sealing ring groove eventually, in order to ensure the sealing performance, it is usually necessary to set an inner chamfer 51 and an outer chamfer 52 in the sealing ring groove. Therefore, in this embodiment, a convex chamfering edge 2111 is respectively set at both ends of the cutting edge 211 to form two upper and lower inner chamfers 51 in the sealing ring groove; at the same time, this embodiment also sets two concave chamfering edges 4 to realize the formation of outer chamfers 51 on the upper and lower sides of the connection between the processed sealing ring groove and the outer surface of the processed surface 200.

[0058] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A circular groove machining tool, characterized in that: include: a blade, wherein the length direction of the blade is a first direction, the width direction of the blade is a second direction, the thickness direction of the blade is a third direction, the blade has an upper end surface and a lower end surface arranged along the third direction, and the blade further has a first side surface and a second side surface arranged along the second direction; and A cutter head is arranged at one end of the blade body, the cutter head and the blade body are arranged along the first direction, the cutter head includes a cutting surface, and the cutting surface has a cutting edge at an edge away from one end of the blade body; along the direction from the first side surface to the second side surface, the distance between the cutting surface and the lower end surface gradually decreases.

2. The annular groove machining tool according to claim 1, characterized in that: A chip breaker groove is provided between the cutting surface and the upper end surface, and the chip breaker groove extends along the second direction and is recessed along the third direction.

3. The annular groove machining tool according to claim 1, characterized in that: The acute angle formed between the extending direction of the cutting edge and the plane where the upper end surface is located is a set angle, and the set angle is 3°-10°.

4. The annular groove machining tool according to claim 3, characterized in that: The setting angle is 5°.

5. The annular groove machining tool according to claim 1, characterized in that: Along the direction from the cutter head to the cutter body, the distance between the cutting surface and the lower end surface gradually decreases.

6. The annular groove machining tool according to any one of claims 1 to 5, characterized in that: The cutter head also includes an auxiliary surface, which is located at an end of the cutter head away from the blade body along the first direction; the auxiliary surface includes a first surface and a second surface arranged along the third direction, and the combination of the first surface and the cutting surface constitutes the cutting edge.

7. The annular groove machining tool according to claim 6, characterized in that: The angle between the first surface and the plane where the cutting surface is located constitutes a first acute angle, the angle between the second surface and the plane where the cutting surface is located constitutes a second acute angle, and the first acute angle is greater than the second acute angle.

8. The annular groove machining tool according to claim 7, characterized in that: Along the third direction, the extension length of the first surface is 0.3 mm-1 mm.

9. The annular groove machining tool according to claim 7, characterized in that: Along the third direction, an extension length of the first surface is 0.5 mm.

10. The annular groove machining tool according to claim 2, characterized in that: Along the extension direction of the cutting edge, each end of the cutting edge has a convex chamfering edge, and the convex chamfering edge is used to process the chamfer inside the annular groove; along the first direction, two concave chamfering edges are provided between the cutting edge and the chip breaker groove, and the two concave chamfering edges are arranged along the second direction and are respectively located at the two ends of the cutter head, and the concave chamfering edges are used to process the chamfer formed at the connection between the annular groove and the outer surface of the machined surface.

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