Camshaft hole thrust surface machining cutter and machining equipment

Abstract

The utility model relates to the technical field of machining equipment, and discloses a cam shaft hole thrust surface machining cutter and machining equipment, the cam shaft hole thrust surface machining cutter comprises a cutter body and a blade assembly, the cutter body comprises a cutter handle and a cutter bar, and the axis of the cutter bar and the axis of the cutter handle extend in the arrangement direction of the cutter handle and the cutter bar; the axis of the cutter bar and the axis of the cutter handle are arranged in a staggered mode in the first direction, the first direction is perpendicular to the arrangement direction, the blade assembly comprises two blades symmetrically arranged on the cutter bar in the arrangement direction, and the two blades are used for cutting thrust surfaces on the two sides of a cam shaft hole respectively. According to the cam shaft hole thrust surface machining tool, the overall diameter of the tool body can be increased by eccentrically arranging the tool bar and the tool handle, so that the overall rigidity of the tool body is increased, and when the thrust surfaces are machined, the thrust surfaces on the two sides of a workpiece are each independently machined through one blade by arranging the two blades which are symmetrically arranged in the arrangement direction, so that the machining efficiency is improved. The problem of vibration marks generated after machining is avoided, and the machining quality of the thrust surface is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing equipment, in particular to a camshaft hole thrust surface processing tool and processing equipment. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] The thrust surface of the engine camshaft hole is mainly used to install the camshaft thrust plate, and the engine camshaft thrust plate plays the role of axial support of the camshaft. While ensuring the circumferential rotation of the camshaft, it prevents the axial movement of the camshaft. The processing quality of the thrust surface of the cylinder head camshaft hole directly affects the assembly of the camshaft, so the processing quality of the thrust surface of the cylinder head camshaft hole is crucial.

[0004] In the traditional method, a three-sided cutting tool is usually used for thrust surface processing. The tool body is overall thin, resulting in poor tool rigidity. After processing, vibration marks will be generated, and the surface quality is poor, making it difficult to effectively ensure the thrust surface processing quality. Utility Model Content

[0005] The purpose of the utility model is to at least solve the problem that the tool has poor rigidity and vibration marks will be generated after processing. This purpose is achieved through the following technical solutions:

[0006] The first aspect of the utility model provides a camshaft hole thrust surface machining tool, comprising:

[0007] A knife body, comprising a knife handle and a knife rod, wherein the knife handle is used to be connected to a driving spindle, and the knife rod is connected to the knife handle, and the axis of the knife rod and the axis of the knife handle both extend along the arrangement direction of the knife handle and the knife rod, and along a first direction, the axis of the knife rod and the axis of the knife handle are staggered, and the first direction is perpendicular to the arrangement direction;

[0008] The blade assembly comprises two blades symmetrically arranged on the blade rod along the arrangement direction, and the two blades are used to cut the thrust surfaces on both sides of the camshaft hole respectively.

[0009] The utility model discloses a camshaft hole thrust surface machining tool, wherein a tool rod and a tool handle are provided, wherein the axis of the tool rod and the axis of the tool handle extend along the arrangement direction of the tool handle and the tool rod, and the axis of the tool rod and the axis of the tool handle are staggered along a first direction perpendicular to the arrangement direction, that is, the tool rod and the tool handle are eccentrically provided, which can increase the overall diameter of the tool body, thereby increasing the overall rigidity of the tool body, and when the tool body is mounted on a machine tool driving spindle for rotation, the eccentric setting can increase the machining radius of the tool body and improve the machining efficiency; at the same time, by providing two blades symmetrically provided along the arrangement direction, when machining the thrust surface, one blade is used for each thrust surface on both sides of the workpiece for separate machining, which can avoid the problem of vibration caused by cutting with multiple blades at the same time when machining one thrust surface, thereby improving the machining quality of the thrust surface.

[0010] In addition, the camshaft hole thrust surface machining tool according to the utility model may also have the following additional technical features:

[0011] In some embodiments of the present invention, along the first direction, the distance between the axis of the knife rod and the blade assembly is smaller than the distance between the axis of the knife handle and the blade assembly.

[0012] In some embodiments of the utility model, along the arrangement direction, a mounting groove is provided on the circumferential surface of one end of the knife rod away from the knife handle, and the two blades are symmetrically arranged in the mounting groove along the arrangement direction.

[0013] In some embodiments of the present invention, the installation groove extends in a direction parallel to the axis of the knife rod, the two blades are respectively arranged at two ends of the installation groove, and the connecting line of the two blades is parallel to the axis of the knife rod.

[0014] In some embodiments of the utility model, the side walls at both ends of the installation groove are provided with profiling grooves, the axial cross-sectional shape of the profiling grooves is adapted to the shape of the blades, and the two blades are arranged in the profiling grooves in a one-to-one correspondence.

[0015] In some embodiments of the present invention, the blade is detachably mounted in the contoured groove by means of screws.

[0016] In some embodiments of the present invention, the two blades have the same structure and are triangular in shape, and two opposite sides of the two blades are perpendicular to the axis of the blade rod.

[0017] In some embodiments of the present invention, the camshaft hole thrust surface machining tool further includes a cooling structure, and the cooling structure is arranged on the tool body, and the cooling structure is used to cool the tool body.

[0018] In some embodiments of the utility model, the cooling structure includes a first cooling channel and two second cooling channels, the first cooling channel is arranged on the tool rod, one end of the first cooling channel is connected to the internal cooling device, and the other end is connected to the two second cooling channels, and the two second cooling channels are respectively connected to the two contoured grooves.

[0019] The second aspect of the utility model proposes a camshaft hole thrust surface processing device, including a machining center and a camshaft hole thrust surface processing tool as described in any one of the above items, the machining center has the driving spindle, the tool holder is connected to the driving spindle, and the axis of the tool holder coincides with the axis of the driving spindle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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:

[0021] Figure 1 The schematic diagram of the structure of the camshaft hole thrust surface machining tool according to the embodiment of the utility model is schematically shown;

[0022] Figure 2 A partial schematic diagram of a camshaft hole thrust surface machining tool according to an embodiment of the utility model is schematically shown;

[0023] Figure 3 for Figure 1 Enlarged view of point A in the middle.

[0024] The reference numerals are as follows:

[0025] 10. Knife handle; 11. Knife bar;

[0026] 20. Blade;

[0027] 3. Screws;

[0028] 40. a first cooling channel; 41. a second cooling channel;

[0029] 5. Internal cooling device;

[0030] 6. Profile groove. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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 above and below orientations.

[0035] The cylinder head is one of the core components of the engine, and the quality of its machining directly affects the operating performance of the engine. The thrust surface of the engine camshaft hole is mainly used to install the camshaft thrust washer, and the engine camshaft thrust washer plays the role of axial support for the camshaft. While ensuring the circumferential rotation of the camshaft, it prevents the axial movement of the camshaft. The machining quality of the thrust surface of the cylinder head camshaft hole directly affects the assembly of the camshaft, and has a close relationship with the operating conditions, performance, emissions, etc. of the engine. Therefore, higher requirements are put forward for the machining quality of the thrust surface of the camshaft hole. It is required that the surface roughness of the thrust surface <Ra3.2, the thrust thickness tolerance <0.1, and the perpendicularity <0.02. The related technology uses an ordinary three-sided edge cutter with a relatively thin tool body, poor tool rigidity, and vibration marks will be generated after machining. The surface quality of the thrust surface is poor, and it is difficult to effectively ensure the machining quality.

[0036] In view of this, the present embodiment provides a machining tool for the thrust surface of the camshaft hole, aiming to increase the overall diameter of the tool body by eccentrically arranging the tool shank 11 and the tool holder 10, improve the tool body rigidity, and avoid the problem of vibration marks generated after machining by arranging two symmetrically arranged blades 20 to cut both sides of the thrust surface respectively, thereby solving the above technical problems.

[0037] As Figure 1 and 2 shown, according to the embodiment of the present invention, a machining tool for the thrust surface of the camshaft hole is proposed. The machining tool for the thrust surface of the camshaft hole is used to machine the thrust surface of the camshaft hole, and includes a tool body and a blade assembly. The tool body includes a tool holder 10 and a tool shank 11. The tool holder 10 is used to connect with the driving spindle, and the tool shank 11 is connected to the tool holder 10. The tool shank 11 and the tool holder 10 are connected through an HSK100A hydraulic interface. There is hydraulic oil inside the hydraulic tool holder 10. When tightening the bolt on the hydraulic tool holder 10, it will push the sealing block of the piston to generate a hydraulic pressure for clamping the tool shank 11 inside the tool holder 10. The hydraulic clamping method can ensure the reliability of the clamping between the tool shank 11 and the tool holder 10, and at the same time improve the repeat positioning accuracy of the tool connection. The tool holder 10 and the tool shank 11 are connected in a split manner, which is convenient for the disassembly and replacement of the tool shank 11 and the tool holder 10. The tool shank 11 or the tool holder 10 can be replaced according to actual needs, and the versatility is good. The axes of the tool shank 11 and the tool holder 10 both extend along the arrangement direction of the tool holder 10 and the tool shank 11. As Figure 1 shown, this arrangement direction is the horizontal direction, that is, the tool holder 10 and the tool shank 11 are arranged horizontally, and along the first direction, the axis of the tool shank 11 is offset from the axis of the tool holder 10. The first direction is perpendicular to the arrangement direction, the first direction is the vertical direction, the axis of the tool shank 11 is deviated from the axis of the tool holder 10, that is, the tool shank 11 and the tool holder 10 are eccentrically arranged, and the overall radial dimension of the tool body is smaller than the radial dimension of the camshaft hole.

[0038] The blade assembly includes two blades 20 symmetrically arranged on the tool bar 11 along the arrangement direction, that is, along the horizontal direction. The two blades 20 are used to cut the thrust surfaces on both sides of the camshaft hole respectively. When processing, the tool bar 11 is first connected to the tool handle 10, and then the tool body is connected to the driving spindle of the machining center. The driving spindle drives the tool to rotate as a whole, and the two blades 20 symmetrically arranged on the tool bar cut the thrust surfaces on both sides of the camshaft hole respectively.

[0039] The camshaft hole thrust surface machining tool of the utility model is provided with a tool rod 11 and a tool handle 10, the axis of the tool rod 11 and the axis of the tool handle 10 extend along the arrangement direction of the tool handle 10 and the tool rod 11, and the axis of the tool rod 11 and the axis of the tool handle 10 are staggered along a first direction perpendicular to the arrangement direction, that is, the tool rod 11 and the tool handle 10 are eccentrically arranged, which can increase the overall diameter of the tool body, thereby increasing the overall rigidity of the tool body, and when the tool body is mounted on the driving spindle of the machine tool for rotation, the eccentric setting can increase the machining radius of the tool body and improve the machining efficiency; at the same time, by providing two blades 20 symmetrically arranged along the arrangement direction, when machining the thrust surface, the thrust surfaces on both sides of the workpiece are separately machined by using a blade 20, which can avoid the problem of vibration caused by cutting with multiple blades at the same time when machining one side of the thrust surface, thereby improving the machining quality of the thrust surface.

[0040] In other embodiments, the shank 11 and the handle 10 may be formed in an integral structure to ensure the reliability of the connection between the handle 10 and the shank 11 .

[0041] In some embodiments of the present invention, the distance between the axis of the knife bar 11 and the blade assembly is smaller than the distance between the axis of the knife handle 10 and the blade assembly. Specifically, the blade assembly includes two blades, and the midpoint of the connecting line of the two blades close to the end points of the knife bar is used as the reference point O. Figure 1 As shown, the distance between the axis of the arbor 11 and the blade assembly, that is, the distance between the reference point O and the axis M of the arbor is L1. Similarly, the distance between the axis of the handle 10 and the blade assembly, that is, the distance between the reference point O and the axis N of the handle is L2. L1 is smaller than L2, so that the arbor and the handle are eccentrically arranged, which can maximize the diameter of the knife body and improve the rigidity of the knife body.

[0042] In some embodiments of the utility model, along the arrangement direction, a mounting groove is provided on the circumference of the end of the knife bar 11 away from the knife handle 10, and two blades 20 are symmetrically arranged in the mounting groove along the arrangement direction. The mounting groove is provided on the circumference of the end of the knife bar 11 away from the knife handle 10, and the mounting groove extends in a direction parallel to the axis of the knife bar 11. The two blades 20 are symmetrically arranged at both ends of the mounting groove in the horizontal direction, and the connecting line of the two blades 20 is parallel to the axis of the knife bar 11.

[0043] In some embodiments of the utility model, the side walls at both ends of the installation groove are provided with profiling grooves 6, the axial cross-sectional shape of the profiling grooves 6 is adapted to the shape of the blades 20, and the two blades 20 are arranged in the profiling grooves 6 in a one-to-one correspondence.

[0044] Specifically, the profiling groove 6 is arranged on the groove wall of the mounting groove. In this embodiment, the axial cross section of the profiling groove 6 is in the shape of a triangle, wherein the two opposite sides of the two triangular profiling grooves 6 are perpendicular to the axis of the shank 11. The two blades 20 have the same structure and are in the shape of a triangle. The blades 20 can be standard blades 20, which have a short production cycle, low use cost and good versatility. The blades 20 are made of cemented carbide and have a CVD (Chemical Vapor Deposition) coating on the surface, which can make the blades 20 have higher resistance to pit wear and cutting edge wear. Each blade 20 can be used 3 times, and the two blades 20 are arranged in a central symmetrical manner. The blades 20 have the same specifications, and the blades 20 on both sides can be used interchangeably to reduce the types of blades 20.

[0045] During installation, the blade 20 is installed in the profiling groove 6, and the cutting edge extends out of the profiling groove 6. The cutting edges of the installed blades 20 are arranged opposite to each other, and the cutting edges of the two blades 20 are also arranged perpendicular to the axis of the arbor 11. The blades 20 are installed by partially slotting the arbor 11 to ensure the strength and rigidity of the cutter body. During cutting, the two blades 20 cut the thrust surfaces on both sides of the camshaft hole respectively. Single-edge cutting has only one cutting edge in contact with the workpiece, so the cutting force is small, the cutting plane is relatively flat, and the processing surface quality is better. At the same time, when one blade 20 is cutting, the vibration problem caused by multiple blades 20 cutting at the same time can be avoided, and the vibration problem caused by multiple blades cutting together can be eliminated, thereby ensuring the processing quality of the thrust surface.

[0046] Of course, the shape of the blade 20 is not limited to the above-mentioned embodiments. For example, in other embodiments, the shape of the blade 20 can also be rectangular, diamond-shaped, etc. Correspondingly, the axial cross-section of the profiling groove 6 is adapted to the shape of the blade 20, as long as the cutting edge of the blade 20 extends out of the profiling groove 6 and is perpendicular to the axis of the arbor 11.

[0047] In addition, in other embodiments, an adjustment component may be provided to adjust the distance between the two blades 20. For example, an adjustment block and an adjustment screw may be provided to move the blades 20 to adjust the distance between the two blades, so as to improve the applicability and processing capability of the camshaft hole thrust surface processing tool. Before processing, the distance between the blades 20 is adjusted to a desired value, and then processing is performed.

[0048] In some embodiments of the utility model, the blade 20 is detachably mounted in the profiling groove 6 by means of a screw 3. Specifically, a connection hole is provided on the blade 20, and a screw hole corresponding to the connection hole is provided on the groove wall of the installation groove, and the blade 20 is detachably mounted in the profiling groove 6 by means of the screw 3. The detachable connection between the blade 20 and the cutter body can facilitate the disassembly, assembly and replacement of the blade 20, thereby improving the processing efficiency and processing quality.

[0049] In other embodiments, the blade 20 may also be installed in other ways, such as bonding, clamping, etc., and this application does not specifically limit this.

[0050] In some embodiments of the utility model, the camshaft hole thrust surface machining tool also includes a cooling structure, which is arranged on the tool body, and the cooling structure is used to cool the tool body. Specifically, the cooling structure includes a first cooling channel 40 and two second cooling channels 41, the first cooling channel 40 is arranged in the tool rod 11, and the axis of the first cooling channel 40 is parallel to the axis of the tool rod 11, one end of the first cooling channel 40 is connected to the internal cooling device 5, and the other end of the first cooling channel 40 is connected to the two second cooling channels 41, the two second cooling channels 41 are respectively connected to the two contoured grooves 6, and the liquid outlet direction of the two second cooling channels 41 is aligned with the cutting edge of the blade 20.

[0051] In this embodiment, the internal cooling device 5 is arranged in the tool handle, and the coolant in the internal cooling device 5 flows through the first cooling channel 40 to the second cooling channel 41, and then the coolant is sprayed onto the two blades 20 through the two second cooling channels 41 to cool the blades 20. By respectively arranging the second cooling channels 41 at the positions of the cutting edges of the two blades 20, and using the two second cooling channels 41 to cool the cutting edges of the two blades 20 respectively, the blades 20 can be fully cooled, meeting the needs of lubrication and cooling during the cutting process, ensuring the processing quality of the thrust surface, and at the same time, the blades 20 are fully cooled, which can improve the processing efficiency and the service life of the blades 20 and reduce the processing cost.

[0052] The second aspect of the utility model proposes a camshaft hole thrust surface processing device, including a machining center and the above-mentioned camshaft hole thrust surface processing tool, the machining center has a driving spindle, the tool handle 10 is connected to the driving spindle, and the axis of the tool handle 10 coincides with the axis of the driving spindle, and the driving spindle drives the tool body to rotate as a whole.

[0053] When the camshaft hole thrust surface machining device of the utility model uses the camshaft hole thrust surface machining tool to perform camshaft hole thrust surface machining, firstly, two blades 20 are installed in the profiling groove 6 through screws 3, and then the tool rod 11 is connected to the tool handle 10 by hydraulic means. After the workpiece is clamped, the thrust surface machining is performed. The specific process method is as follows:

[0054] The cutter body is mounted on the driving spindle of the processing equipment. After the connection is completed, the driving spindle is moved to allow the cutter to move. After the center of the cutter body coincides with the camshaft hole, the driving spindle is moved forward; when the cutter body moves forward to a certain position, that is, the blade 20 has passed the thrust stop, and there is a certain safety margin between the blade 20 and the thrust surface, preferably 0.5mm, the tool is returned to the center so that the cutting position of the blade 20 coincides with the thrust surface circle; the spindle is started, and the spindle is driven forward by interpolation processing to process the thrust surface on one side. After the processing of the thrust surface on one side is completed, the driving spindle is moved backward. When the blade 20 is 0.5mm away from the thrust surface, the tool is fed in to complete the processing of the thrust surface on the other side; after the processing of the thrust surfaces on both sides is completed, the equipment drives the spindle to move so that the center of the cutter body coincides with the center of the camshaft hole, and the driving spindle is quickly retracted backward along the front-to-back direction until the cutter body completely exits the camshaft hole position and then stops moving, completing the entire processing of the thrust surface of the camshaft hole by the tool.

[0055] The utility model uses a blade 20 to process the thrust surfaces on both sides of the camshaft hole separately through the above-mentioned process method, which can effectively reduce the vibration during the processing, avoid the vibration marks that are easy to be generated during the processing, and ensure the processing quality of the thrust surfaces.

[0056] 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 camshaft hole thrust surface machining tool, characterized in that: include: A knife body, comprising a knife handle and a knife rod, wherein the knife handle is used to be connected to a driving spindle, and the knife rod is connected to the knife handle, and the axis of the knife rod and the axis of the knife handle both extend along the arrangement direction of the knife handle and the knife rod, and along a first direction, the axis of the knife rod and the axis of the knife handle are staggered, and the first direction is perpendicular to the arrangement direction; The blade assembly comprises two blades symmetrically arranged on the blade rod along the arrangement direction, and the two blades are used to cut the thrust surfaces on both sides of the camshaft hole respectively.

2. The camshaft hole thrust surface machining tool according to claim 1, characterized in that: Along the first direction, the distance between the axis of the knife rod and the blade assembly is smaller than the distance between the axis of the knife handle and the blade assembly.

3. The camshaft hole thrust surface machining tool according to claim 1, characterized in that: Along the arrangement direction, a mounting groove is arranged on the circumferential surface of one end of the knife rod away from the knife handle, and the two blades are symmetrically arranged in the mounting groove along the arrangement direction.

4. The camshaft hole thrust surface machining tool according to claim 3, characterized in that: The installation groove extends in a direction parallel to the axis of the knife rod, the two blades are respectively arranged at two ends of the installation groove, and the connecting line of the two blades is parallel to the axis of the knife rod.

5. The camshaft hole thrust surface machining tool according to claim 4, characterized in that: The side walls at both ends of the installation groove are provided with profiling grooves, the axial cross-sectional shape of the profiling grooves is adapted to the shape of the blades, and the two blades are arranged in the profiling grooves in a one-to-one correspondence.

6. The camshaft hole thrust surface machining tool according to claim 5, characterized in that: The blade is detachably mounted in the contoured groove by means of screws.

7. The camshaft hole thrust surface machining tool according to claim 1, characterized in that: The two blades have the same structure and are triangular in shape, and two opposite sides of the two blades are perpendicular to the axis of the blade rod.

8. The camshaft hole thrust surface machining tool according to claim 5, characterized in that: The camshaft hole thrust surface machining tool further comprises a cooling structure, wherein the cooling structure is arranged on the tool body, and the cooling structure is used to cool the tool body.

9. The camshaft hole thrust surface machining tool according to claim 8, characterized in that: The cooling structure includes a first cooling channel and two second cooling channels. The first cooling channel is arranged on the tool rod. One end of the first cooling channel is used to communicate with the internal cooling device, and the other end is connected to the two second cooling channels. The two second cooling channels are respectively connected to the two contoured grooves.

10. A camshaft hole thrust surface processing device, characterized in that: It comprises a machining center and a camshaft hole thrust surface machining tool as claimed in any one of claims 1 to 9, wherein the machining center has the driving spindle, the tool holder is connected to the driving spindle, and the axis of the tool holder coincides with the axis of the driving spindle.

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