Diesel engine bed oil channel hole processing technology

Abstract

The application discloses a diesel engine base oil channel hole machining process and belongs to the technical field of machining. The diesel engine base oil channel hole machining process can make the auxiliary accessory head be located at the first end bearing and the first side of each intermediate bearing, can make the auxiliary accessory head process the first oil channel hole of the first end bearing and the second oil channel hole of each intermediate bearing along the first direction from the first end bearing to the second end bearing, can improve the processing quality of the second oil channel hole, can reduce the number of boring tool installation and positioning, is favorable for simplifying the operation process and improving the production efficiency. The original accessory head is adopted to drive the boring tool to process the third oil channel hole of the second end bearing, the processing quality of the third oil channel hole can be ensured, and the machining efficiency of the diesel engine base can be improved.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to a machining process for oil passage holes in a diesel engine base. Background Technology

[0002] Large diesel engines are widely used in many fields. Marine diesel engines and diesel generator sets are powered by large diesel engines. The machining of key fixed components of diesel engines, such as engine base and crankcase, is a key process in the manufacturing of large diesel engines. In particular, the machining of the main oil passage hole of the engine base is crucial. As the most important oil passage hole of the diesel engine base, the quality of machining directly affects the assembly accuracy of the main oil passage pipe, thereby affecting the lubrication of the diesel engine during operation.

[0003] In related technologies, the machine base is generally cast as a whole from cast iron or cast steel into a blank. After annealing and aging, the cutting tool is driven by the original accessory head of the machine tool to perform machining on the blank.

[0004] Common large diesel engine mounts are typically 3 to 4 meters long. The main oil passage is a sealed part, requiring stable quality. The surface roughness of the hole is usually Ra=1.6μm. Each engine mount has multiple main oil passages, each located on a different bearing. The spacing between different bearings varies. Sometimes, the spacing between two adjacent bearings is too small, preventing the original accessory head of the machine tool from entering the gap between the bearings. Consequently, it is impossible to drive the cutting tool to machine the main oil passage hole on that bearing using the original accessory head. Although some manufacturers can machine the main oil passage holes manually using specialized tools, manual machining has large errors, often resulting in unstable dimensions, inconsistent chamfer dimensions at the hole ends, and other problems, making it difficult to guarantee machining quality. Summary of the Invention

[0005] The purpose of this invention is to provide a machining process for oil passage holes in diesel engine bases, which can not only improve the machining quality of oil passage holes, but also increase production efficiency and reduce production costs.

[0006] To achieve the above objectives, the following technical solution is provided:

[0007] The diesel engine mount oil passage hole machining process includes a first end and a second end disposed opposite to each other along a first direction. The diesel engine mount also includes a plurality of bearings spaced apart along the first direction. Each bearing has a first side facing the first end. The bearing located at the first end is designated as end bearing one, the bearing located at the second end is designated as end bearing two, and the bearing located between end bearing one and end bearing two is designated as intermediate bearing. Along the first direction, the distance between end bearing two and its adjacent intermediate bearing is smaller than the distance between any two other adjacent bearings.

[0008] The machining process for the main oil passage hole of the diesel engine base includes the following steps:

[0009] The auxiliary attachment head is positioned on the first side of the end bearing and each of the intermediate bearings, and the auxiliary attachment head drives the boring tool to operate, so as to process the first oil passage hole of the end bearing and the second oil passage hole of each of the intermediate bearings; the first oil passage hole and each of the second oil passage holes are all arranged to pass through along the first direction;

[0010] The original accessory head is positioned outside the second end bearing along the first direction, and the original accessory head drives the boring tool to operate, so as to process the third oil passage hole of the second end bearing; the third oil passage hole and the second oil passage hole are connected along the first direction; along the first direction, the length of the auxiliary accessory head is less than the length of the original accessory head.

[0011] As a preferred technical solution for the above-mentioned diesel engine base oil passage hole processing technology, the bearing includes a narrow bearing and a wide bearing, and along the first direction, the width of the wide bearing is greater than the width of the narrow bearing;

[0012] When the auxiliary attachment head drives the boring tool to operate in order to machine the second oil passage hole of the wide bearing, the boring tool is mounted on the auxiliary attachment head via an extended tool holder.

[0013] As a preferred technical solution for the above-mentioned diesel engine base oil passage hole machining process, the following steps are also included:

[0014] The auxiliary accessory heads are respectively located on the first side of the end bearing and each of the intermediate bearings;

[0015] The first chamfering tool is mounted on the auxiliary accessory head, and the auxiliary accessory head drives the first chamfering tool to chamfer the first oil passage hole and the end of the second oil passage hole facing the auxiliary accessory head, respectively.

[0016] The second chamfering tool is mounted on the auxiliary accessory head via an extended tool holder, and the auxiliary accessory head drives the second chamfering tool to chamfer the first oil passage hole and the end of the second oil passage hole facing away from the auxiliary accessory head.

[0017] As a preferred technical solution for the above-mentioned diesel engine base oil passage hole machining process, the following steps are also included:

[0018] Position the original accessory head outside the end bearing two along the first direction;

[0019] The original accessory head drives the first chamfering tool to chamfer the end of the third oil passage facing the original accessory head;

[0020] The original accessory head drives the second chamfering tool to chamfer the end of the third oil passage hole that is away from the original accessory head.

[0021] As a preferred technical solution for the above-mentioned diesel engine base oil passage hole machining process, one end of the second chamfering tool is installed on the auxiliary accessory head or the original accessory head, and the other end is provided with an angled cutting edge.

[0022] As a preferred technical solution for the above-mentioned diesel engine base oil passage hole machining process, before the auxiliary accessory head drives the boring tool to operate and machine the second oil passage holes of each of the intermediate bearings, the following steps are also included:

[0023] The auxiliary attachment head drives the scraping tool to scrape the intermediate bearing flat along the first direction surface toward the end face of the auxiliary attachment head and form a starting end face.

[0024] When the auxiliary attachment head drives the boring tool to operate in order to process the second oil passage hole of each of the intermediate bearings, the cutting depth of the boring tool along the first direction is calculated based on the position of the starting end face in the first direction.

[0025] And / or, when the auxiliary attachment head drives the first chamfering tool to chamfer the end of the second oil passage facing the auxiliary attachment head, the cutting depth of the first chamfering tool along the first direction is calculated based on the position of the starting end face in the first direction;

[0026] And / or, when the auxiliary attachment head drives the second chamfering tool to chamfer the end of the second oil passage away from the auxiliary attachment head, the cutting depth of the second chamfering tool along the first direction is calculated based on the position of the starting end face in the first direction.

[0027] As a preferred technical solution for the above-mentioned diesel engine base oil passage hole machining process, the auxiliary accessory head is located in front of the first end bearing and the first side of each of the intermediate bearings, and the following steps are also included:

[0028] Position the original accessory head outside the end bearing along the first direction, and drive the scraping tool with the original accessory head to scrape the end face of the end bearing along the first direction toward the middle bearing flat.

[0029] As a preferred technical solution for the above-mentioned diesel engine base oil passage hole machining process, the scraping tool includes a scraping tool body, the scraping tool body includes a cutting edge and a tail end arranged opposite to each other along the first direction, and the cutting edge is provided with a scraping edge;

[0030] When the auxiliary attachment head drives the scraping tool to scrape the intermediate bearing flat along the first direction with the end face of the auxiliary attachment head, the cutting edge is positioned facing the intermediate bearing.

[0031] When the original accessory head is positioned outside the end bearing along the first direction, and the original accessory head drives the scraping tool to scrape the end face of the end bearing along the first direction towards the intermediate bearing, the cutting edge is positioned towards the end bearing.

[0032] As a preferred technical solution for the above-mentioned diesel engine base oil passage hole machining process, a gap is formed between two adjacent bearing bushes;

[0033] Before positioning the auxiliary accessory heads on the first side of each of the end bearings and the first side of each of the intermediate bearings, the method further includes the following steps:

[0034] If there is an interference portion in the gap that prevents the auxiliary accessory head from moving along the first direction, then remove the interference portion.

[0035] As a preferred technical solution for the above-mentioned diesel engine base oil passage hole processing technology, the diesel engine base is provided with a guide portion extending along the first direction;

[0036] Detecting whether there is an interference part within the gap that obstructs the movement of the auxiliary accessory head along the first direction includes the following steps:

[0037] Place the contour piece of the auxiliary accessory head into the gap;

[0038] The guide portion guides the contouring component to move from one end of the gap to the other end along the first direction. If the contouring component cannot move, there is an interference portion on the side wall of the gap.

[0039] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0040] The diesel engine mount oil passage hole machining process of the present invention, along the first direction, has an auxiliary accessory head with a length smaller than that of the original accessory head. The auxiliary accessory head can enter the gap between the end bearing and the adjacent intermediate bearing, as well as between two adjacent intermediate bearings, and then machine the second oil passage hole on the intermediate bearing. Compared with the prior art, this process can improve the machining quality of the second oil passage hole and increase production efficiency.

[0041] By positioning the auxiliary attachment head on the first side of the end bearing and each intermediate bearing, the auxiliary attachment head can process the first oil passage hole of the end bearing and the second oil passage hole of each intermediate bearing one by one along the first direction from the end bearing to the end bearing. This reduces the number of times the boring tool needs to be installed and positioned, simplifies the operation process, improves production efficiency, and reduces production costs.

[0042] Because the distance between the end bearing shell 2 and its adjacent intermediate bearing shell is smaller than the distance between the other two adjacent bearing shells along the first direction, the gap between the end bearing shell 2 and its adjacent intermediate bearing shell, which the auxiliary accessory head cannot enter, can be machined by using the original accessory head to drive the boring tool to process the third oil passage hole of the end bearing shell 2. This facilitates the use of the original accessory head to process the third oil passage hole and other structures of the diesel engine mount, which not only ensures the machining quality of the third oil passage hole, but also improves the machining efficiency of the diesel engine mount. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the diesel engine base in an embodiment of the present invention;

[0044] Figure 2 This is a flowchart illustrating the machining process of the main oil passage hole in the diesel engine mount, as described in this embodiment of the invention.

[0045] Figure 3 This is a schematic diagram of the auxiliary accessory head in an embodiment of the present invention;

[0046] Figure 4 This is a schematic diagram of the first structure of the precision boring tool in an embodiment of the present invention;

[0047] Figure 5 This is a schematic diagram of the second structure of the precision boring tool in an embodiment of the present invention;

[0048] Figure 6 This is a schematic diagram of the structure of the extended tool holder, auxiliary tool holder, and second chamfering tool in an embodiment of the present invention;

[0049] Figure 7 This is a schematic diagram of the extended tool holder in an embodiment of the present invention;

[0050] Figure 8 This is a schematic diagram of the auxiliary tool holder and scraping tool in an embodiment of the present invention;

[0051] Figure 9 This is a schematic diagram of the first structure of the auxiliary tool holder in an embodiment of the present invention;

[0052] Figure 10 This is a schematic diagram of the second structure of the auxiliary tool holder in an embodiment of the present invention;

[0053] Figure 11This is a schematic diagram of the contouring component in an embodiment of the present invention;

[0054] Figure 12 This is a schematic diagram of the structure of the diesel engine base and the contoured part in an embodiment of the present invention.

[0055] In the picture:

[0056] 100. Diesel engine base; 101. First end; 102. Second end; 103. End bearing one; 103a. First oil passage hole; 104. Intermediate bearing; 104a. Second oil passage hole; 1041. First intermediate bearing; 1042. Second intermediate bearing; 1043. Third intermediate bearing; 1044. Fourth intermediate bearing; 1045. Fifth intermediate bearing; 1046. Sixth intermediate bearing; 1047. Seventh intermediate bearing; 1048. Eighth intermediate bearing; 105. End bearing two; 105a. Third oil passage hole; 106. Neutral; 107. Horizontal reference plane; 108. Vertical reference plane;

[0057] 1. Auxiliary accessory head; 11. Arc section; 2. Precision boring tool; 21. Precision boring tool holder; 22. Adjustment mechanism; 221. Screw; 222. Nut; 23. Precision boring tool body; 3. Second chamfering tool; 31. Angle cutting edge; 4. Extended tool shank; 5. Auxiliary tool shank; 51. Mounting slot; 511. First inner wall; 512. Second inner wall; 52. Set screw; 6. Scraping tool; 61. Scraping tool body; 611. Cutting edge; 6111. Scraping edge; 612. Tail end; 613. Scraping section; 7. Copying part; 71. Arc copying part; 72. Horizontal positioning surface; 73. Vertical positioning surface. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0059] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0060] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0061] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0062] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0063] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0064] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0065] like Figures 1 to 12 As shown, this embodiment provides a machining process for the oil passage hole of a diesel engine base, which is used to machine the oil passage hole of the diesel engine base 100. This process can not only improve the machining quality of the oil passage hole, but also improve production efficiency and safety, and reduce production costs.

[0066] Specifically, such as Figure 1As shown, the diesel engine mount 100 includes a first end 101 and a second end 102 disposed opposite to each other along a first direction. The diesel engine mount 100 also includes a plurality of bearings spaced apart along the first direction. Each bearing includes a first side facing the first end 101. The bearing located at the first end 101 is designated as end bearing 103, the bearing located at the second end 102 is designated as end bearing 105, and the bearing located between end bearing 103 and end bearing 105 is designated as intermediate bearing 104. Along the first direction, the distance between end bearing 105 and its adjacent intermediate bearing 104 is smaller than the distance between any two other adjacent bearings.

[0067] like Figure 2 As shown, the machining process for the main oil passage hole of the diesel engine base 100 includes the following steps:

[0068] S1. Position the auxiliary attachment head 1 on the first side of the end bearing 103 and each intermediate bearing 104, and drive the boring tool to operate to machine the first oil passage hole 103a of the end bearing 103 and the second oil passage hole 104a of each intermediate bearing 104; the first oil passage hole 103a and each second oil passage hole 104a are all connected along the first direction;

[0069] S2. Position the original accessory head on the outer side of the end bearing bush 2 105 along the first direction, and drive the boring tool with the original accessory head to process the third oil passage hole 105a of the end bearing bush 2 105; the third oil passage hole 105a and the second oil passage hole 104a are connected along the first direction; along the first direction, the length of the auxiliary accessory head 1 is less than the length of the original accessory head.

[0070] It should be noted that, along the first direction, the length of the auxiliary accessory head 1 is less than the length of the original accessory head. The auxiliary accessory head 1 can enter the gap 106 between the end bearing 103 and the adjacent intermediate bearing 104, and between two adjacent intermediate bearings 104, thereby processing the second oil passage hole 104a on the intermediate bearing 104. Compared with the prior art, this can improve the processing quality of the second oil passage hole 104a and increase production efficiency.

[0071] Since the end bearing 103 and the end bearing 2 105 are located at the two ends of the diesel engine base 100 along the first direction, if the original accessory head is used to process the first oil passage hole 103a of the end bearing 103 and the third oil passage hole 105a of the end bearing 2 105, the original accessory head needs to be reversed, which is cumbersome.

[0072] In this embodiment, the auxiliary attachment head 1 is positioned on the first side of the end bearing 103 and each intermediate bearing 104, respectively. This allows the auxiliary attachment head 1 to process the first oil passage hole 103a of the end bearing 103 and the second oil passage hole 104a of each intermediate bearing 104 in a first direction from the end bearing 103 to the end bearing 105. This eliminates the need for the auxiliary attachment head 1 to be reversed, reduces the number of times the boring tool needs to be installed and positioned, simplifies the operation process, improves production efficiency, and reduces production costs.

[0073] Because the distance between the end bearing 105 and its adjacent intermediate bearing 104 is smaller than the distance between other two adjacent bearings along the first direction, the auxiliary attachment head 1 cannot enter the gap 106 between the end bearing 105 and its adjacent intermediate bearing 104. By using the original attachment head to drive the boring tool to process the third oil passage hole 105a of the end bearing 105, it is convenient to use the original attachment head to process the third oil passage hole 105a and other structures of the diesel engine base 100. This not only ensures the processing quality of the third oil passage hole 105a, but also improves the processing efficiency of the diesel engine base 100.

[0074] Specifically, the boring tool includes a rough boring tool, a semi-finish boring tool, and a finish boring tool 2. The rough boring tool, the semi-finish boring tool, and the finish boring tool 2 are sequentially installed on the auxiliary accessory head 1 or the original accessory head, and then rough boring, semi-finish boring, and finish boring operations are performed on the first oil passage hole 103a, the second oil passage hole 104a, or the third oil passage hole 105a, respectively, so as to improve the machining accuracy of the first oil passage hole 103a, the second oil passage hole 104a, and the third oil passage hole 105a.

[0075] In some embodiments, such as Figure 3 and Figure 4 As shown, the precision boring tool 2 includes a precision boring tool holder 21, an adjustment mechanism 22, and a precision boring tool body 23. The precision boring tool holder 21 is used to mount on the auxiliary accessory head 1 or the original accessory head. The precision boring tool body 23 is adjustablely positioned on the precision boring tool holder 21 along its radial direction. The adjustment mechanism 22 is configured to adjust the radial position of the precision boring tool body 23 along the precision boring tool holder 21, thereby enabling more precise control of the dimensional accuracy of the first oil passage hole 103a, the second oil passage hole 104a, and the third oil passage hole 105a. Specifically, the radial direction of the precision boring tool holder 21 is perpendicular to the first direction.

[0076] For example, the precision boring tool body 23 is slidably disposed on the precision boring tool holder 21 along the radial direction of the precision boring tool holder 21, and the precision boring tool body 23 is restricted from rotating relative to the precision boring tool holder 21. For example, a guide such as a slide rail can be provided between the precision boring tool body 23 and the precision boring tool holder 21 so that the precision boring tool body 23 can slide along the radial direction of the precision boring tool holder 21, and the precision boring tool body 23 is restricted from rotating relative to the precision boring tool holder 21.

[0077] Furthermore, the adjusting mechanism 22 includes a screw 221 and a nut 222. One end of the screw 221 is fixedly connected to the precision boring tool body 23. The nut 222 is sleeved on the outside of the screw 221 and threadedly connected to the screw 221. The nut 222 is rotatably mounted on the precision boring tool holder 21, and a damping structure is provided between the nut 222 and the precision boring tool holder 21. When it is necessary to rotate the nut 222, a certain torque is applied to the nut 222 by a wrench, so that the nut 222 can rotate. That is to say, the nut 222 can withstand a certain external force without rotating, thereby ensuring the installation stability of the precision boring tool body 23. For example, the damping structure includes the thread between the nut 222 and the screw 221. By increasing the friction of the thread between the nut 222 and the screw 221, rotational resistance is provided to the nut 222, thereby ensuring that the nut 222 can withstand a certain external force without rotating. The method of increasing the friction of the thread between the nut 222 and the screw 221 is existing technology and will not be described in detail here.

[0078] Furthermore, the precision boring tool holder 21 is provided with an angle scale, and the nut 222 is provided with an angle mark. When rotating the nut 222, the angle through which the nut 222 has rotated can be determined by the angle scale indicated by the angle mark, thereby determining the radial position of the precision boring tool body 23 along the precision boring tool holder 21.

[0079] In some embodiments, the bearing bush includes a narrow bearing bush and a wide bearing bush, wherein the width of the wide bearing bush is greater than the width of the narrow bearing bush along a first direction.

[0080] Furthermore, when the auxiliary attachment head 1 drives the boring tool to machine the second oil passage hole 104a of the wide bearing, the boring tool is mounted on the auxiliary attachment head 1 via an extended tool holder 4. This extends the working stroke of the boring tool, enabling the auxiliary attachment head 1 to bore both narrow bearings with a narrow width along the first direction and wide bearings with a larger width along the first direction, thus improving the versatility of the auxiliary attachment head 1 and enhancing the ease and efficiency of machining the oil passage hole of the diesel engine base 100.

[0081] In some embodiments, the machining process for the main oil passage hole of the diesel engine base further includes the following steps:

[0082] The auxiliary accessory head 1 is positioned on one side of the end bearing 103 and each intermediate bearing 104 along the first direction.

[0083] The first chamfering tool is installed on the auxiliary accessory head 1, and the auxiliary accessory head 1 drives the first chamfering tool to chamfer the ends of the first oil passage hole 103a and the second oil passage hole 104a facing the auxiliary accessory head 1, respectively.

[0084] The second chamfering tool 3 is mounted on the auxiliary accessory head 1 via the extended tool holder 4, and the auxiliary accessory head 1 drives the second chamfering tool 3 to chamfer the ends of the first oil passage hole 103a and the second oil passage hole 104a that are away from the auxiliary accessory head 1.

[0085] Specifically, the chamfering of the first oil passage hole 103a includes the following steps:

[0086] Position the auxiliary accessory head 1 on one side of the end bearing 103 along the first direction;

[0087] The first chamfering tool is installed on the auxiliary accessory head 1, and the auxiliary accessory head 1 drives the first chamfering tool to chamfer the end of the first oil passage hole 103a facing the auxiliary accessory head 1.

[0088] The second chamfering tool 3 is mounted on the auxiliary accessory head 1 via the extended tool holder 4, and the auxiliary accessory head 1 drives the second chamfering tool 3 to chamfer the end of the first oil passage hole 103a that is away from the auxiliary accessory head 1.

[0089] In other words, when chamfering both ends of the first oil passage hole 103a along the first direction, the auxiliary accessory head 1 is located on the first side of the end bearing 103, thus eliminating the need to change the position of the auxiliary accessory head 1 and making the operation more convenient. Since the distance between the end of the first oil passage hole 103a facing the auxiliary accessory head 1 and the auxiliary accessory head 1 is small, when chamfering the end of the first oil passage hole 103a facing the auxiliary accessory head 1, the first chamfering tool can be directly installed on the auxiliary accessory head 1 to meet the chamfering requirements. However, the distance between the end of the first oil passage hole 103a away from the auxiliary accessory head 1 and the auxiliary accessory head 1 is large. When chamfering the end of the first oil passage hole 103a away from the auxiliary accessory head 1, the second chamfering tool 3 is installed on the auxiliary accessory head 1 via the extended tool shank 4. This not only extends the working stroke of the second chamfering tool 3 but also ensures the installation stability of the second chamfering tool 3, which is beneficial for improving the chamfering quality and thus ensuring that the chamfering of the end of the first oil passage hole 103a away from the auxiliary accessory head 1 meets the requirements.

[0090] When chamfering the second oil passage hole 104a, the following steps are included:

[0091] Position the auxiliary accessory head 1 on one side of the intermediate bearing 104 along the first direction;

[0092] The first chamfering tool is installed on the auxiliary accessory head 1, and the auxiliary accessory head 1 drives the first chamfering tool to chamfer the end of the second oil passage hole 104a facing the auxiliary accessory head 1.

[0093] The second chamfering tool 3 is mounted on the auxiliary accessory head 1 via the extended tool holder 4, and the auxiliary accessory head 1 drives the second chamfering tool 3 to chamfer the end of the second oil passage hole 104a that is away from the auxiliary accessory head 1.

[0094] In other words, when chamfering both ends of the second oil passage hole 104a along the first direction, the auxiliary accessory head 1 is located on the first side of the intermediate bearing 104, thus eliminating the need to change the position of the auxiliary accessory head 1 and making the operation more convenient. Since the distance between the end of the second oil passage hole 104a facing the auxiliary accessory head 1 and the auxiliary accessory head 1 is small, when chamfering this end, the first chamfering tool can be directly installed on the auxiliary accessory head 1 to meet the chamfering requirements. However, the distance between the end of the second oil passage hole 104a away from the auxiliary accessory head 1 and the auxiliary accessory head 1 is large. When chamfering this end, the second chamfering tool 3 is installed on the auxiliary accessory head 1 via the extended tool shank 4. This not only extends the working stroke of the second chamfering tool 3 but also ensures the installation stability of the second chamfering tool 3, which is beneficial for improving the chamfering quality and ensuring that the chamfering of the end of the second oil passage hole 104a away from the auxiliary accessory head 1 meets the requirements.

[0095] In some embodiments, the machining process for the main oil passage hole of the diesel engine base further includes the following steps:

[0096] Position the original accessory head on the outer side of the end bearing 2 105 along the first direction;

[0097] The original accessory head drives the first chamfering tool to chamfer the end of the third oil passage hole 105a facing the original accessory head;

[0098] The original accessory head drives the second chamfering tool 3 to chamfer the end of the third oil passage hole 105a that is away from the original accessory head.

[0099] Because the tool holder of the original accessory head is relatively long, and the original accessory head is located on the outside of the end bearing 105 along the first direction, the original accessory head can have a large range of motion. Therefore, when chamfering the two ends of the third oil passage hole 105a along the first direction, the chamfering requirements can be met by directly installing the first chamfering tool and the second chamfering tool 3 onto the tool holder of the original accessory head.

[0100] In some embodiments, such as Figure 6As shown, one end of the second chamfering tool 3 is mounted on the auxiliary accessory head 1 or the original accessory head, and the other end is provided with an angled cutting edge 31. Exemplarily, the extension direction of the angled cutting edge 31 has a first included angle with the first direction. The first included angle is equal to the chamfering angle of the end of the first oil passage hole 103a facing away from the auxiliary accessory head 1. The first included angle is equal to the chamfering angle of the end of the second oil passage hole 104a facing away from the auxiliary accessory head 1. The first included angle is equal to the chamfering angle of the end of the third oil passage hole 105a facing away from the original accessory head. This ensures that the chamfering of the end of the first oil passage hole 103a facing away from the auxiliary accessory head 1, the chamfering of the end of the second oil passage hole 104a facing away from the auxiliary accessory head 1, and the chamfering of the end of the third oil passage hole 105a facing away from the original accessory head all meet the requirements, and avoids the problem of tool breakage during the chamfering process.

[0101] For example, the second chamfering tool 3 is made of high-speed steel. The second chamfering tool 3 has a cuboid structure and is hand-ground with a 15° angled cutting edge 31.

[0102] In some embodiments, such as Figure 6 and Figure 7 As shown, when the second chamfering tool 3 is driven to work by the auxiliary attachment head 1, one end of the second chamfering tool 3 is mounted on the auxiliary tool holder 5, the auxiliary tool holder 5 is mounted on the extended tool holder 4, and the extended tool holder 4 is mounted on the auxiliary attachment head 1. When the second chamfering tool 3 is driven to work by the original attachment head, the second chamfering tool 3 is mounted on the auxiliary tool holder 5, and the auxiliary tool holder 5 is mounted on the original attachment head. This improves the convenience and stability of installing the second chamfering tool 3.

[0103] Specifically, when the auxiliary tool holder 5 is installed on the original accessory head or the auxiliary accessory head 1, the axis of the auxiliary tool holder 5 is parallel to the first direction. When the first oil passage hole 103a is chamfered using the second chamfering tool 3, the axis of the auxiliary tool holder 5 coincides with the axis of the first oil passage hole 103a. When the second oil passage hole 104a is chamfered using the second chamfering tool 3, the axis of the auxiliary tool holder 5 coincides with the axis of the second oil passage hole 104a. When the third oil passage hole 105a is chamfered using the second chamfering tool 3, the axis of the auxiliary tool holder 5 coincides with the axis of the third oil passage hole 105a.

[0104] In some embodiments, before the auxiliary attachment head 1 drives the boring tool to operate in order to machine the second oil passage hole 104a of each intermediate bearing 104, the following steps are also included:

[0105] The auxiliary attachment head 1 drives the scraping tool 6 to scrape the intermediate bearing 104 flat along the first direction surface facing the auxiliary attachment head 1 and form the starting end face.

[0106] When the auxiliary attachment head 1 drives the boring tool to operate in order to machine the second oil passage hole 104a of each intermediate bearing 104, the cutting depth of the boring tool along the first direction is calculated based on the position of the starting end face in the first direction.

[0107] The above settings can improve the control accuracy of the depth of the second oil passage hole 104a along the first direction, thereby improving the machining quality of the diesel engine base 100.

[0108] In some embodiments, when the auxiliary attachment head 1 drives the first chamfering tool to chamfer the end of the second oil passage hole 104a facing the auxiliary attachment head 1, the cutting depth of the first chamfering tool along the first direction is calculated based on the position of the starting end face in the first direction. This improves the machining accuracy of the chamfering of the end of the second oil passage hole 104a facing the auxiliary attachment head 1.

[0109] In some embodiments, when the auxiliary attachment head 1 drives the second chamfering tool 3 to chamfer the end of the second oil passage hole 104a away from the auxiliary attachment head 1, the cutting depth of the second chamfering tool 3 along the first direction is calculated based on the position of the starting end face in the first direction. This improves the machining accuracy of the chamfering of the end of the second oil passage hole 104a away from the auxiliary attachment head 1.

[0110] Of course, in the subsequent machining steps of the diesel engine base 100, the position of the starting end face in the first direction can be used as the basis for calculating the cutting depth of the machining tools of other structures along the first direction, so as to improve the machining accuracy of the entire diesel engine base 100.

[0111] In some embodiments, positioning the auxiliary accessory head 1 before the end bearing 103 and the first side of each intermediate bearing 104 further includes the following steps:

[0112] Position the original accessory head on the outside of the end bearing 103 along the first direction, and drive the scraping tool 6 to scrape the end face of the end bearing 103 towards the middle bearing 104 along the first direction.

[0113] With the above configuration, the distance between the end bearing 103 and the adjacent intermediate bearing 104 along the first direction can be increased, providing more operating space for the auxiliary accessory head 1. This is beneficial to improving the machining convenience and accuracy of boring and chamfering the second oil passage hole 104a of the intermediate bearing 104, and also improves machining safety.

[0114] In some embodiments, the scraping tool 6 includes a scraping body 61, which includes a cutting edge 611 and a tail end 612 disposed opposite to each other along a first direction. The cutting edge 611 is provided with a scraping blade 6111. Further, when the auxiliary accessory head 1 drives the scraping tool 6 to scrape the intermediate bearing 104 flat against the end face of the auxiliary accessory head 1 along the first direction, the cutting edge 611 is disposed facing the intermediate bearing 104. Further, when the original accessory head is positioned outside the end bearing 103 along the first direction, and the original accessory head drives the scraping tool 6 to scrape the end bearing 103 flat against the end face of the intermediate bearing 104 along the first direction, the cutting edge 611 is disposed facing the end bearing 103. Since the end face of the end bearing 103 facing the middle bearing 104 along the first direction and the end face of the end bearing 103 facing the middle bearing 104 along the first direction are two end faces arranged opposite each other along the first direction, by simply changing the orientation of the cutting edge 611 of the scraper body 61, the scraper tool 6 can scrape both the end face of the middle bearing 104 facing the auxiliary accessory head 1 along the first direction and the end face of the end bearing 103 facing the middle bearing 104 along the first direction, which improves the versatility of the scraper tool 6 and helps to reduce costs.

[0115] In some embodiments, such as Figures 8 to 10 As shown, the scraper body 61 is mounted on the auxiliary accessory head 1 via the auxiliary tool holder 5. Specifically, the auxiliary tool holder 5 is mounted on the auxiliary accessory head 1, and the scraper body 61 is mounted on the auxiliary tool holder 5, thereby improving the ease of installation of the scraper body 61 and enhancing the installation stability of the scraper body 61.

[0116] Specifically, one end of the auxiliary tool holder 5 along its axial direction is connected to the original accessory head, and the other end is provided with a mounting groove 51. The mounting groove 51 includes a first inner wall 511 and a second inner wall 512 arranged radially opposite to each other along the auxiliary tool holder 5. The first inner wall 511 is provided with a set screw 52. When installing the scraper body 61, the scraper body 61 is placed in the mounting groove 51, and the set screw 52 is tightened so that the set screw 52 presses the scraper body 61 against the second inner wall 512, thereby fixing the scraper body 61. For example, there are two set screws 52, which are spaced apart, thereby improving the installation stability of the scraper body 61.

[0117] In some embodiments, the cutting edge 611 includes two scraping portions 613 disposed opposite each other along a second direction. Both scraping portions 613 are located outside the auxiliary tool holder 5. Each scraping portion 613 includes a scraping blade 6111, and the scraping blades 6111 of the two scraping portions 613 are respectively disposed on both sides of the scraping tool body 61 along a third direction; the first direction, the second direction, and the third direction are perpendicular to each other. Thus, scraping operations can be performed simultaneously by the two scraping blades 6111, which can not only improve processing efficiency but also improve scraping quality.

[0118] It is understandable that, since multiple bearing bushes are spaced apart along the first direction, a gap 106 is formed between two adjacent bearing bushes.

[0119] In some embodiments, positioning the auxiliary accessory head 1 before the end bearing 103 and the first side of each intermediate bearing 104 further includes the following steps:

[0120] The system detects whether there is an interference part within the neutral 106 that obstructs the movement of the auxiliary accessory head 1 in the first direction. If so, the interference part is removed. This prevents the auxiliary accessory head 1 from colliding with the interference part, improving production safety and also preventing damage to the cutting tool, auxiliary accessory head 1, and diesel engine base 100.

[0121] In some embodiments, such as Figure 1 , Figure 2 , Figure 11 and Figure 12 As shown, the diesel engine mount 100 is provided with a guide portion extending in a first direction. Further, detecting whether there is an interference portion within the neutral 106 that obstructs the movement of the auxiliary accessory head 1 in the first direction includes the following steps:

[0122] Place the contour piece 7 of the auxiliary accessory head 1 into the gap 106;

[0123] The guide portion guides the contouring part 7 to move from one end of the gap 106 to the other end along the first direction. If the contouring part 7 cannot move, there is an interference portion on the side wall of the gap 106.

[0124] It should be noted that the shape and size of the profile 7 of the auxiliary accessory head 1 are completely consistent with the front end of the auxiliary accessory head 1. That is to say, before the auxiliary accessory head 1 is put into the neutral position 106, the profile 7 of the auxiliary accessory head 1 is first made to travel through the neutral position 106 according to the working stroke of the auxiliary accessory head 1. This allows for a direct and quick determination of whether there are any interference parts in the neutral position 106, which is beneficial to improving the processing efficiency and processing safety of the diesel engine base 100.

[0125] Specifically, the auxiliary attachment head 1 includes an arc portion 11. When the auxiliary attachment head 1 is used to process the first oil passage hole 103a, the center of the arc portion 11 is located on the axis of the first oil passage hole 103a. When the auxiliary attachment head 1 is used to process the second oil passage hole 104a, the center of the arc portion 11 is located on the axis of the second oil passage hole 104a.

[0126] Furthermore, the contouring component 7 includes an arc contouring portion 71, and the outer diameter of the arc contouring portion 71 is the same as that of the arc portion 11. When the contouring component 7 is guided by the guide portion to move from one end of the gap 106 to the other end along the first direction, if there is an interference portion in the gap 106, the interference portion will abut against the arc contouring portion 71 along the first direction, thereby blocking the movement of the contouring component 7. Thus, the interference portion can be detected simply and quickly through the contouring component 7.

[0127] It should be noted that when the scraping tool 6 is installed on the auxiliary accessory head 1, neither end of the scraping tool 6 protrudes from the auxiliary accessory head 1 along its radial direction, thereby preventing the ends of the scraping tool body 61 from colliding with the side wall of the gap 106. Specifically, when the scraping tool 6 is installed on the auxiliary accessory head 1, the length of the scraping tool 6 along its radial direction is equal to the arc diameter of the auxiliary accessory head 1.

[0128] For example, the guide portion guides the contouring component 7 to move from one end of the gap 106 to the other end along the first direction. That is, the guide portion includes a horizontal reference surface 107 and a vertical reference surface 108 provided on the diesel engine base 100. The contouring component 7 of the auxiliary accessory head 1 includes a horizontal positioning surface 72 and a vertical positioning surface 73. The horizontal positioning surface 72 is pressed against the horizontal reference surface 107, and the vertical positioning surface 73 is pressed against the vertical reference surface 108. Then, by manually moving the contouring component 7, the contouring component 7 can move along the first direction within the gap 106, thereby detecting the interference portion within the gap 106. The operation is convenient.

[0129] For example, when there is an interference portion in the gap 106, the interference portion can be ground flat by a grinding wheel so that the profile 7 can move smoothly in the gap 106 along the first direction under the guidance of the guide portion.

[0130] For example, the diesel engine mount 100 in this embodiment is a 4413kW, 16V270 type diesel engine mount. The engine block of the 16V270 type diesel engine includes a crankcase and a mount, and the crankcase and mount are arranged in an upper and lower structure.

[0131] Specifically, the 16V270 diesel engine mount includes ten bearings: one end bearing 103, one end bearing 2 105, and eight intermediate bearings 104. For ease of description, along the first direction from end bearing 103 to end bearing 2 105, the eight intermediate bearings 104 are respectively designated as the first intermediate bearing 1041, the second intermediate bearing 1042, the third intermediate bearing 1043, the fourth intermediate bearing 1044, the fifth intermediate bearing 1045, the sixth intermediate bearing 1046, the seventh intermediate bearing 1047, and the eighth intermediate bearing 1048. Among them, the fourth intermediate bearing 1044 and the eighth intermediate bearing 1048 are wide bearings, while the remaining bearings are narrow bearings.

[0132] Before machining the oil passage hole of the diesel engine base 100, six equal-height shims are fixed on the worktable according to the preset position, and the upper surface of the shims is milled flat. Then the diesel engine base 100 is hoisted onto the shims, with the mating side of the diesel engine base 100 and the crankcase (i.e. the side of the diesel engine base 100 opposite to the crankcase) facing upwards. The side reference of the diesel engine base 100 is aligned, and then the diesel engine base 100 is clamped and fixed.

[0133] For example, taking the 16V270 diesel engine mount 100 as an example, the oil passage hole machining process of the diesel engine mount in this embodiment includes the following steps:

[0134] S11. The modeling part 7 is used to detect whether there is an interference part in each gap 106. If so, the interference part is removed.

[0135] Specifically, the horizontal positioning surface 72 of the profiler 7 is pressed against the horizontal reference surface 107 of the diesel engine base 100, and the vertical positioning surface 73 of the profiler 7 is pressed against the vertical reference surface 108 of the diesel engine base 100. Then, the profiler 7 is manually moved so that it moves along the first direction within the neutral 106, thereby detecting the interference within the neutral 106. If interference exists, it can be smoothed out using a grinding wheel.

[0136] S12. Position the original accessory head on the outside of the end bearing 103 along the first direction, and drive the scraping tool 6 to scrape the end bearing 103 flat towards the middle bearing 104 along the first direction.

[0137] Specifically, the original accessory head is first positioned on the outer side of the end bearing 103 along the first direction. Then, the auxiliary tool holder 5 is installed on the planar milling cutter shank of the original accessory head, causing the original accessory head to move the auxiliary tool holder 5 and extend it into the first oil passage hole 103a. Then, the scraper body 61 is installed on the auxiliary tool holder 5 from the end of the first oil passage hole 103a away from the original accessory head. At this time, the cutting edge 611 of the scraper body 61 is set facing the bottom wall of the mounting groove 51 along the first direction. Then, the original accessory head drives the scraper body 61 to rotate, so as to scrape the end face of the end bearing 103 facing the middle bearing 104 along the first direction.

[0138] S13. Replace the original accessory head with auxiliary accessory head 1.

[0139] It should be noted that the original accessory head is used in all processes before machining the oil passage hole of the diesel engine base 100. Therefore, using the original accessory head in step S12 can not only flatten the end bearing 103 along the first direction towards the end face of the intermediate bearing 104, but also make the operation convenient.

[0140] S14. Position the auxiliary attachment head 1 on the first side of the end bearing 103 and each intermediate bearing 104, and drive the scraping tool 6 to scrape each intermediate bearing 104 flat along the first direction towards the end face of the auxiliary attachment head 1 to form a starting end face, and record the coordinates of the starting end face of each intermediate bearing 104 along the first direction.

[0141] Specifically, the auxiliary attachment head 1 is first positioned in the gap 106 between the end bearing 103 and the first intermediate bearing 1041. Then, the auxiliary tool bar 5 is installed on the auxiliary attachment head 1, and the scraper body 61 is installed on the auxiliary tool bar 5. At this time, the cutting edge 611 of the scraper body 61 is set away from the bottom wall of the mounting groove 51 along the first direction. The scraper body 61 is driven to rotate by the auxiliary attachment head 1 to scrape the end face of the first intermediate bearing 1041 facing the auxiliary attachment head 1 along the first direction and form the first starting end face.

[0142] Furthermore, the auxiliary attachment head 1 is positioned in the gap 106 between the first intermediate bearing 1041 and the second intermediate bearing 1042, and the scraper body 61 is driven to rotate by the auxiliary attachment head 1 to scrape the end face of the second intermediate bearing 1042 facing the auxiliary attachment head 1 along the first direction and form a second starting end face.

[0143] Furthermore, the auxiliary attachment head 1 is positioned in the gap 106 between the second intermediate bearing 1042 and the third intermediate bearing 1043, and the scraper body 61 is driven to rotate by the auxiliary attachment head 1 to scrape the end face of the third intermediate bearing 1043 facing the auxiliary attachment head 1 along the first direction and form the third starting end face.

[0144] This process continues until the auxiliary attachment head 1 is positioned in the gap 106 between the seventh intermediate bearing 1047 and the eighth intermediate bearing 1048. The auxiliary attachment head 1 drives the scraper body 61 to rotate, thereby scraping the end face of the eighth intermediate bearing 1048 facing the auxiliary attachment head 1 along the first direction to form the eighth starting end face.

[0145] Specifically, the coordinates of the first starting end face along the first direction are designated Z2, Z3, Z4, Z5, Z6, Z7, Z8, and Z9, respectively. Then, during subsequent boring and chamfering operations on each of the second oil passage holes 104a, the cutting depth of the boring and chamfering tools along the first direction is calculated using the coordinates of their respective starting end faces.

[0146] S15. Position the auxiliary attachment head 1 on the first side of each narrow bearing and drive the boring tool to process the first oil passage hole 103a or the second oil passage hole 104a of each narrow bearing.

[0147] Specifically, the auxiliary attachment head 1 is positioned on the first side of the end bearing bush 103, and the auxiliary attachment head 1 drives the rough boring tool to perform rough boring on the first oil passage hole 103a of the end bearing bush 103.

[0148] Furthermore, the auxiliary attachment head 1 is positioned on the first side of the first intermediate bearing 1041, and the auxiliary attachment head 1 drives the rough boring tool to perform rough boring on the second oil passage hole 104a of the first intermediate bearing 1041.

[0149] Furthermore, the auxiliary attachment head 1 is positioned on the first side of the second intermediate bearing 1042, and the auxiliary attachment head 1 drives the rough boring tool to perform rough boring on the second oil passage hole 104a of the second intermediate bearing 1042.

[0150] In turn, the auxiliary attachment head 1 performs rough boring on the second oil passage hole 104a of the third intermediate bearing 1043, the fifth intermediate bearing 1045, the sixth intermediate bearing 1046 and the seventh intermediate bearing 1047 respectively.

[0151] Then, the semi-finish boring tool is driven by the auxiliary attachment head 1 to perform semi-finish boring on the first oil passage hole 103a or the second oil passage hole 104a of each narrow bearing.

[0152] Then, the precision boring tool 2 is driven by the auxiliary attachment head 1 to perform precision boring on the first oil passage hole 103a or the second oil passage hole 104a of each narrow bearing.

[0153] When using the precision boring tool 2 for precision boring, the position of the precision boring tool body 23 along the radial direction of the precision boring tool holder 21 can be slightly adjusted by turning the nut 222 with a wrench. After each adjustment and trial cut, the inner diameter of the first oil passage hole 103a or the second oil passage hole 104a is measured with an inner diameter gauge and compared with the drawing requirements, thereby gradually approaching the target size and ensuring the dimensional accuracy of the first oil passage hole 103a and the second oil passage hole 104a.

[0154] For example, the inner diameter of the first oil passage hole 103a or the second oil passage hole 104a after rough boring is 67mm; the inner diameter of the first oil passage hole 103a or the second oil passage hole 104a after semi-finish boring is 78.8mm; and the inner diameter of the first oil passage hole 103a or the second oil passage hole 104a after finish boring is 79.324mm.

[0155] S16. Position the auxiliary attachment head 1 on the first side of each wide bearing, and make the auxiliary attachment head 1 drive the boring tool through the extended tool bar 4 to process the second oil passage hole 104a of each wide bearing.

[0156] It should be noted that in step S16, the rough boring tool, semi-finish boring tool and finish boring tool 2 are all mounted on the auxiliary accessory head 1 through the extended tool holder 4, so as to process the second oil passage hole 104a of the fourth intermediate bearing 1044 and the eighth intermediate bearing 1048 respectively. The specific processing steps can be compared with step S15, and will not be repeated here.

[0157] S17. Position the auxiliary attachment head 1 on the first side of the end bearing 103 and each intermediate bearing 104, and drive the first chamfering tool to chamfer the ends of the first oil passage hole 103a and the second oil passage hole 104a facing the auxiliary attachment head 1.

[0158] Specifically, the first chamfering tool holder is mounted on the tool holder of the auxiliary accessory head 1, for example, by bolting the first chamfering tool to the tool holder of the auxiliary accessory head 1. Exemplarily, the first chamfering tool is a mechanically clamped insert.

[0159] S18. The extended tool holder 4 is installed on the auxiliary accessory head 1, the auxiliary tool holder 5 is installed on the extended tool holder 4, the second chamfering tool 3 is installed on the auxiliary tool holder 5, and the auxiliary accessory head 1 drives the second chamfering tool 3 to chamfer the ends of the first oil passage hole 103a and the second oil passage hole 104a away from the auxiliary accessory head 1, respectively.

[0160] Specifically, the auxiliary accessory head 1 is positioned on the first side of the end bearing 103. The extended tool bar 4 is installed on the tool holder of the auxiliary accessory head 1. Then, the auxiliary accessory head 1 drives the extended tool bar 4 to extend into the first oil passage hole 103a. Then, the auxiliary tool bar 5 is installed on the extended tool bar 4 from the end of the first oil passage hole 103a away from the auxiliary accessory head 1. Then, the second chamfering tool 3 is installed on the auxiliary tool bar 5 to chamfer the end of the first oil passage hole 103a away from the auxiliary accessory head 1.

[0161] After the first oil passage hole 103a is chamfered at the end away from the auxiliary accessory head 1, the auxiliary accessory head 1 is stopped from working. The second chamfering tool 3 is removed first, and then the auxiliary tool bar 5 is removed. The auxiliary accessory head 1 is then moved to the first side of the first intermediate bearing 1041, and the extended tool bar 4 is inserted into the second oil passage hole 104a of the first intermediate bearing 1041. The auxiliary tool bar 5 is then installed on the extended tool bar 4 from the end of the second oil passage hole 104a away from the auxiliary accessory head 1. The second chamfering tool 3 is then installed on the auxiliary tool bar 5 to chamfer the end of the second oil passage hole 104a away from the auxiliary accessory head 1.

[0162] Similarly, the second oil passage hole 104a of the remaining intermediate bearing 104 is chamfered at the end opposite to the auxiliary accessory head 1.

[0163] S19. Position the original accessory head on the outer side of the end bearing bush 2 105 along the first direction, and drive the boring tool with the original accessory head to process the third oil passage hole 105a of the end bearing bush 2 105.

[0164] Specifically, the third oil passage hole 105a is machined using a semi-finish boring tool and a finish boring tool 2, respectively. The rough boring process of the third oil passage hole 105a has been completed in the previous process.

[0165] S20. Position the original accessory head on the outer side of the end bearing 105 along the first direction, and drive the first chamfering tool to chamfer the end of the third oil passage hole 105a facing the original accessory head.

[0166] S21. Drive the original accessory head to move the second chamfering tool 3 to chamfer the end of the third oil passage hole 105a that is away from the original accessory head.

[0167] Specifically, after step S20 is completed, the first chamfering tool is removed, and the auxiliary tool holder 5 is installed on the planar milling cutter shank of the original accessory head. Then, the original accessory head drives the auxiliary tool holder 5 to extend into the third oil passage hole 105a. The second chamfering tool 3 is then installed on the auxiliary tool holder 5 from the end of the third oil passage hole 105a away from the original accessory head, so as to chamfer the end of the third oil passage hole 105a away from the original accessory head.

[0168] The diesel engine mount oil passage hole machining process described in this embodiment is easy to operate, produces products with stable quality and a low scrap rate. Furthermore, it eliminates the need for internal cooling water, reduces equipment requirements, provides protection for the equipment, and lowers design and manufacturing costs.

[0169] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. The machining process for oil passage holes in a diesel engine base, characterized in that, The diesel engine mount includes a first end and a second end disposed opposite to each other along a first direction. The diesel engine mount also includes a plurality of bearing bushes spaced apart along the first direction. Each bearing bush includes a first side facing the first end. The bearing bush located at the first end is designated as end bearing bush one, the bearing bush located at the second end is designated as end bearing bush two, and the bearing bush located between end bearing bush one and end bearing bush two is designated as intermediate bearing bush. Along the first direction, the distance between end bearing bush two and its adjacent intermediate bearing bush is smaller than the distance between any two other adjacent bearing bushes. The machining process for the oil passage holes in the diesel engine base includes the following steps: The auxiliary attachment head is positioned on the first side of the end bearing and each of the intermediate bearings, and the auxiliary attachment head drives the boring tool to operate, so as to process the first oil passage hole of the end bearing and the second oil passage hole of each of the intermediate bearings; the first oil passage hole and each of the second oil passage holes are all arranged to pass through along the first direction; The original accessory head is positioned outside the second end bearing along the first direction, and the original accessory head drives the boring tool to operate, so as to process the third oil passage hole of the second end bearing; the third oil passage hole and the second oil passage hole are connected along the first direction; along the first direction, the length of the auxiliary accessory head is less than the length of the original accessory head; The auxiliary accessory heads are respectively located on the first side of the end bearing and each of the intermediate bearings; The first chamfering tool is mounted on the auxiliary accessory head, and the auxiliary accessory head drives the first chamfering tool to chamfer the first oil passage hole and the end of the second oil passage hole facing the auxiliary accessory head, respectively. The second chamfering tool is mounted on the auxiliary accessory head via an extended tool holder, and the auxiliary accessory head drives the second chamfering tool to chamfer the first oil passage hole and the end of the second oil passage hole facing away from the auxiliary accessory head, respectively. The bearing bush includes a narrow bearing bush and a wide bearing bush, wherein along the first direction, the width of the wide bearing bush is greater than the width of the narrow bearing bush; When the auxiliary attachment head drives the boring tool to operate in order to machine the second oil passage hole of the wide bearing, the boring tool is mounted on the auxiliary attachment head via an extended tool holder.

2. The machining process for the oil passage hole in the diesel engine base according to claim 1, characterized in that, It also includes the following steps: Position the original accessory head outside the end bearing two along the first direction; The original accessory head drives the first chamfering tool to chamfer the end of the third oil passage facing the original accessory head; The original accessory head drives the second chamfering tool to chamfer the end of the third oil passage hole that is away from the original accessory head.

3. The machining process for the oil passage hole in the diesel engine base according to claim 1 or 2, characterized in that, One end of the second chamfering tool is mounted on the auxiliary accessory head or the original accessory head, and the other end is provided with an angled cutting edge.

4. The machining process for the oil passage hole in the diesel engine base according to claim 1, characterized in that, Before the auxiliary attachment head drives the boring tool to machine the second oil passage holes of each of the intermediate bearings, the following steps are also included: The auxiliary attachment head drives the scraping tool to scrape the intermediate bearing flat along the first direction surface toward the end face of the auxiliary attachment head and form a starting end face. When the auxiliary attachment head drives the boring tool to operate in order to process the second oil passage hole of each of the intermediate bearings, the cutting depth of the boring tool along the first direction is calculated based on the position of the starting end face in the first direction. And / or, when the auxiliary attachment head drives the first chamfering tool to chamfer the end of the second oil passage facing the auxiliary attachment head, the cutting depth of the first chamfering tool along the first direction is calculated based on the position of the starting end face in the first direction; And / or, when the auxiliary attachment head drives the second chamfering tool to chamfer the end of the second oil passage away from the auxiliary attachment head, the cutting depth of the second chamfering tool along the first direction is calculated based on the position of the starting end face in the first direction.

5. The diesel engine base oil passage hole machining process according to claim 4, characterized in that, Before positioning the auxiliary accessory heads on the first side of each of the end bearings and the first side of each of the intermediate bearings, the method further includes the following steps: Position the original accessory head outside the end bearing along the first direction, and drive the scraping tool with the original accessory head to scrape the end face of the end bearing along the first direction toward the middle bearing flat.

6. The machining process for the oil passage hole in the diesel engine base according to claim 5, characterized in that, The scraping tool includes a scraping body, which includes a cutting edge and a tail end disposed opposite to each other along the first direction, and the cutting edge is provided with a scraping edge; When the auxiliary attachment head drives the scraping tool to scrape the intermediate bearing flat along the first direction with the end face of the auxiliary attachment head, the cutting edge is positioned facing the intermediate bearing. When the original accessory head is positioned outside the end bearing along the first direction, and the original accessory head drives the scraping tool to scrape the end face of the end bearing along the first direction towards the intermediate bearing, the cutting edge is positioned towards the end bearing.

7. The machining process for the oil passage hole in the diesel engine base according to claim 1, characterized in that, A gap is formed between two adjacent bearing bushes; Before positioning the auxiliary accessory heads on the first side of each of the end bearings and the first side of each of the intermediate bearings, the method further includes the following steps: If there is an interference portion in the gap that prevents the auxiliary accessory head from moving along the first direction, then remove the interference portion.

8. The machining process for the oil passage hole in the diesel engine base according to claim 7, characterized in that, The diesel engine mount is provided with a guide portion extending along the first direction; Detecting whether there is an interference part within the gap that obstructs the movement of the auxiliary accessory head along the first direction includes the following steps: Place the contour piece of the auxiliary accessory head into the gap; The guide portion guides the contouring component to move from one end of the gap to the other end along the first direction. If the contouring component cannot move, there is an interference portion on the side wall of the gap.

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