Method and device for machining a hole in a propeller shaft flange yoke

Abstract

The present application relates to the technical field of drive shaft flange yoke, in particular to a kind of hole processing method and device of drive shaft flange yoke.Method includes based on flange yoke clamping completion, control flange yoke rotates around first axis;Based on flange yoke is in rotating state, control compound cutter moves, to form second semi-finished hole by rough boring cutter with first semi-finished hole hole expansion;Based on second semi-finished hole processing completion, control compound cutter moves, to process snap spring groove in second semi-finished hole by cutting groove cutter, form third semi-finished hole;Snap spring groove is connected between expansion hole and positioning hole;The diameter of snap spring groove is greater than the diameter of expansion hole.This has solved the problem of how to process ear hole convenient for assembly snap spring.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drive shaft flange yoke, in particular to a hole processing method and device of drive shaft flange yoke. BACKGROUND

[0002] The drive shaft flange yoke plays a key role in connecting the drive shaft and the universal joint in the mechanical transmission system. The ear hole, i.e. the bearing hole, on the drive shaft flange yoke is the core part of the universal joint, which provides a basic space for the stable assembly of the universal joint.

[0003] However, in actual production operation, due to the elastic deformation characteristics and specific structure size of the circlip, the circlip is prone to jamming and skewing during embedding, which not only reduces the assembly efficiency, but also may cause damage to the circlip or the inner wall of the ear hole. At the same time, additional equipment is needed in the reaming process, which leads to low efficiency. Therefore, the ear hole needs to be reamed to meet the requirements of efficient assembly of the circlip. The precision requirement of reaming one end of the ear hole is high, which increases the complexity of ear hole processing. Therefore, how to process the ear hole convenient for assembling the circlip becomes a technical problem to be solved. SUMMARY

[0004] To solve the problem of how to process the ear hole convenient for assembling the circlip, the present application provides a hole processing method and device of drive shaft flange yoke.

[0005] In the first aspect, the present application provides a hole processing method of drive shaft flange yoke, which comprises:

[0006] Based on the clamping of the flange yoke being completed, the flange yoke is controlled to rotate around a first axis; wherein the flange yoke comprises an integral flange body and two ears; the first half-finished hole is formed on the ear; the first axis coincides with the axis of the first half-finished hole;

[0007] Based on the flange yoke being in a rotating state, a composite tool is controlled to move to expand the first half-finished hole to form a second half-finished hole by a rough boring cutter; wherein the composite tool comprises a tool handle, a rough boring cutter and a slotting cutter; the rough boring cutter and the slotting cutter are connected with the tool handle respectively; the second half-finished hole comprises an expansion hole and a positioning hole; the diameter of the expansion hole is greater than that of the positioning hole; the expansion hole is connected with the positioning hole; the diameter of the positioning hole is greater than that of the first half-finished hole;

[0008] based on the second semi-finished hole being processed, the compound tool is controlled to move to process a clamping spring groove in the second semi-finished hole by a slotting cutter to form a third semi-finished hole; the clamping spring groove is connected between the expansion hole and the positioning hole; the diameter of the clamping spring groove is greater than the diameter of the expansion hole.

[0009] In some embodiments, based on the flange fork being in a rotating state, the compound tool is controlled to move to expand the first semi-finished hole to form a second semi-finished hole by a rough boring cutter, including:

[0010] based on the flange fork being in a rotating state, the compound tool is controlled to move along a second axis direction until a first radial offset is adjusted to a first radius value; wherein the second axis is perpendicular to the first axis; the first radial offset is a distance of the rough boring cutter deviating from the first axis; and the first radius value is a radius of the expansion hole;

[0011] based on the first radial offset being the first radius value, the compound tool is controlled to move along the first axis until the rough boring cutter processes and forms the expansion hole;

[0012] based on the expansion hole being processed, the compound tool is controlled to move along the second axis until the first radial offset is adjusted to a second radius value; wherein the second radius value is an axis of the positioning hole;

[0013] based on the first radial offset being the second radius value, the compound tool is controlled to move along the first axis until the rough boring cutter processes and forms the positioning hole, and the second semi-finished hole is processed.

[0014] In some embodiments, based on the second semi-finished hole being processed, the compound tool is controlled to move to process a clamping spring groove in the second semi-finished hole by a slotting cutter to form a third semi-finished hole, including:

[0015] based on the second semi-finished hole being processed, the compound tool is controlled to move along the first axis until the slotting cutter is located at a preset slotting position of the second semi-finished hole;

[0016] based on the slotting cutter being located at the preset slotting position, the compound tool is controlled to move along a second axis until a second radial offset is a third radius value to process and form the clamping spring groove, and the third semi-finished hole is processed; wherein the second radial offset is a distance of the slotting cutter deviating from the first axis; and the third radius value is a radius of the clamping spring groove.

[0017] In some embodiments, after the second half-finished hole machining is completed, the hole machining method of the transmission shaft flange yoke further comprises:

[0018] based on the second half-finished hole machining being completed, controlling the compound tool to move along the second axis until the second tool projection amount is less than the radius of the positioning hole; in the state of the second half-finished hole machining being completed, the tool shank is arranged in the second half-finished hole, and the corresponding lug is located between the rough boring tool and the slotting tool.

[0019] In some embodiments, the hole machining method of the transmission shaft flange yoke further comprises:

[0020] based on the second tool projection amount being the third radius value, controlling the compound tool to remain stationary for a preset time length.

[0021] In some embodiments, the hole machining method of the transmission shaft flange yoke further comprises:

[0022] based on the compound tool remaining stationary for the preset time length, controlling the compound tool to move along the second axis until a first tool projection amount is less than the radius of the positioning hole and a second tool projection amount is less than the radius of the expansion hole; wherein the first tool projection amount is the distance by which the rough boring tool deviates from the first axis.

[0023] based on the first tool projection amount being less than the radius of the positioning hole and the second tool projection amount being less than the radius of the expansion hole, controlling the compound tool to move along the first axis so that the compound tool is separated from the flange yoke.

[0024] In some embodiments, when the slotting tool is located at the preset slotting position, the projection of the width of the cutting edge of the slotting tool along the second axis covers the joint between the expansion hole and the positioning hole in the second half-finished hole.

[0025] In some embodiments, the hole machining method of the transmission shaft flange yoke further comprises:

[0026] based on the third half-finished hole machining being completed, using a fine boring tool to perform fine boring machining on the third half-finished hole to form a bearing hole.

[0027] In a second aspect, the present application provides a hole machining device for a transmission shaft flange yoke, which is applied to the hole machining method of the transmission shaft flange yoke in any one of the first aspect.

[0028] The hole machining device for the transmission shaft flange yoke comprises:

[0029] A machine tool assembly includes a worktable, a clamping unit, a rough boring spindle and a cutter head; the clamping unit is rotationally connected with the worktable around a first axis; the clamping unit is used for clamping a flange fork; the rough boring spindle is slidingly connected with the worktable along the first axis; the cutter head is slidingly connected with the rough boring spindle along a second axis; the first axis is perpendicular to the second axis;

[0030] A composite cutter includes a cutter handle, a rough boring cutter and a slotting cutter; the cutter handle is parallel to the first axis; the rough boring cutter and the slotting cutter are connected with the cutter handle respectively; the cutter handle is connected with the cutter head; the rough boring cutter protrudes from the cutter handle along the second axis by a first height; the slotting cutter protrudes from the cutter handle along the second axis by a second height; the first height is smaller than the second height; the width of the cutting edge of the rough boring cutter along the first axis is a first width; the width of the cutting edge of the slotting cutter along the second axis is a second width; the first width is smaller than the second width.

[0031] In some embodiments, the machine tool assembly further includes a finish boring spindle and a sliding platform; the finish boring spindle is slidingly connected with the worktable along the first axis; the sliding platform is slidingly connected with the worktable along a third axis; the third axis is perpendicular to the first axis and the second axis respectively; the clamping unit is rotationally connected with the sliding platform around the first axis.

[0032] To solve the problem of how to process an ear hole for facilitating assembly of a snap spring, the present application has the following advantages:

[0033] By controlling the rotation of the flange fork around the first axis coinciding with the axis of the first semi-finished hole, the composite cutter including the cutter handle, the rough boring cutter and the slotting cutter is controlled to move based on the rotation state, so that the rough boring cutter expands the first semi-finished hole to form a second semi-finished hole including an expansion hole and a positioning hole, the second semi-finished hole is a stepped hole, and through the expansion hole with a larger diameter, it is easier to assemble with the snap spring groove in subsequent assembly of the snap spring. Then, the composite cutter is further controlled to move so that the slotting cutter processes a snap spring groove in the second semi-finished hole to form a third semi-finished hole, realizing one-time processing and forming of the stepped hole and one-time processing and forming of the snap spring groove, and through the composite cutter integrating the rough boring cutter and the slotting cutter, the number of clamping is reduced, thereby avoiding the increase of process switching time cost and positioning error caused by step-by-step processing, and finally improving the efficiency and precision of the processed hole. At the same time, the cutter head of the rough boring cutter is relatively slender, which, on one hand, will result in low processing efficiency due to structural characteristics, and on the other hand, the slender cutter head is prone to vibration during processing, which is difficult to guarantee the processing precision. The cutter head of the rough boring cutter is larger, which not only can complete the processing of the snap spring groove at one time, but also has smaller vibration during processing, which can effectively guarantee the processing precision and better meet the demand for efficient processing. Attached Figure Description

[0034] Figure 1 A flowchart illustrating a method for machining holes in a drive shaft flange fork according to one embodiment is shown;

[0035] Figure 2 A schematic diagram of a hole-machining apparatus for a drive shaft flange fork according to one embodiment is shown;

[0036] Figure 3 A partial sectional view of the drive shaft flange fork is shown;

[0037] Figure 4 A schematic diagram of a composite cutting tool is shown.

[0038] Reference numerals: 10 fork; 11 flange body; 12 lug; 13 bearing hole; 131 expansion hole; 132 snap ring groove; 133 positioning hole; 20 machine tool assembly; 21 worktable; 22 rough boring spindle; 23 unwinding head; 24 finish boring spindle; 30 compound tool; 31 tool holder; 32 rough boring tool; 33 grooving tool. Detailed Implementation

[0039] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0040] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0041] In actual production operations, due to the elastic deformation characteristics and specific structural dimensions of the snap ring, jamming and misalignment can easily occur during snap ring insertion. This not only reduces assembly efficiency but may also damage the snap ring or the inner wall of the ear hole. Therefore, it is necessary to enlarge the ear hole to ensure that the hole diameter meets the requirements for efficient snap ring assembly. However, the precision requirements for enlarging one end of the ear hole are high, increasing the complexity of ear hole machining. Therefore, how to machine an ear hole that facilitates snap ring assembly has become an urgent technical problem to be solved. To solve the above problems, this application provides a method for machining the hole in the transmission shaft flange fork 10.

[0042] Example 1:

[0043] In this embodiment, as Figure 1As shown, a hole processing method of a transmission shaft flange yoke 10 includes steps S10-S30, which can be described in detail as follows:

[0044] In step S10, based on the clamping completion of the flange yoke 10, the flange yoke 10 is controlled to rotate around a first axis, thereby providing a stable rotation reference for subsequent processing, ensuring the accurate relative position between the compound tool 30 and the first semi-finished hole during processing, and being beneficial to improve the processing precision. The flange yoke 10 includes an integral flange body 11 and two ears 12, and the integral forming improves the overall structural strength of the flange yoke 10. The first semi-finished hole is formed on the ear 12, and the first axis coincides with the axis of the first semi-finished hole.

[0045] In step S20, based on the rotation of the flange yoke 10, the compound tool 30 is controlled to move to expand the first semi-finished hole to form a second semi-finished hole through a rough boring cutter 32. During processing, the flange yoke 10 rotates, but the compound tool 30 does not rotate. The compound tool 30 includes a tool handle 31, the rough boring cutter 32, and a slotting cutter 33. The rough boring cutter 32 and the slotting cutter 33 are respectively connected with the tool handle 31. The second semi-finished hole includes an expansion hole 131 and a positioning hole 133. The diameter of the expansion hole 131 is greater than that of the positioning hole 133, the expansion hole 131 is connected with the positioning hole 133, and the diameter of the positioning hole 133 is greater than that of the first semi-finished hole. The rough boring cutter 32 expands the first semi-finished hole to form the second semi-finished hole including the expansion hole 131 and the positioning hole 133 under the rotation of the flange yoke 10, realizes the one-time processing forming of the stepped hole, avoids the multiple clamping caused by step-by-step processing, saves the process switching time, and reduces the vibration by expanding with the rough boring cutter 32, thereby ensuring the processing precision. The rough boring cutter 32 and the slotting cutter 33 are integrated on the compound tool 30, which prepares for the subsequent processing of the spring retaining groove 132, reduces the number of tool replacement, and further improves the processing efficiency.

[0046] Step S30, based on the completion of the second semi-finished hole processing, the composite tool 30 is controlled to move to process the circlip groove 132 in the second semi-finished hole by the slotting tool 33, and a third semi-finished hole is formed. The circlip groove 132 is connected between the expansion hole 131 and the positioning hole 133, and the diameter of the circlip groove 132 is larger than that of the expansion hole 131. In this way, the circlip groove 132 connected between the expansion hole 131 and the positioning hole 133 is processed in the second semi-finished hole by the slotting tool 33, and the slotting tool 33 is wide enough to process the circlip groove 132 at one time, without the need for multiple processing, saving processing time; the circlip groove 132 is arranged at the step, and the structure of the expansion hole 131 enables the compressed circlip to be placed into the circlip groove 132 without being compressed to a large extent when placed into the ear hole, facilitating the installation of the circlip; at the same time, the same composite tool 30 is used to complete the hole expansion and slotting, and the clamping is saved once, and the clamping is saved twice in total, significantly improving the efficiency of hole processing. Since the cutter head of the rough boring tool 32 is relatively thin, if it is used to process the circlip groove 132, on the one hand, the processing efficiency will be low due to the structural characteristics; on the other hand, the thin cutter head is prone to vibration during processing, which is difficult to guarantee the processing precision. The cutter head of the rough boring tool 32 is large, which not only can complete the processing of the circlip groove 132 at one time, but also has small vibration during processing, which can effectively guarantee the processing precision and better meet the demand for efficient processing.

[0047] Preferably, the diameter of the first semi-finished hole is 64mm, so that the rough boring tool 32 processes the diameter of the expansion hole 131 to 68.2mm, and then processes the diameter of the positioning hole 133 to 67mm. After the expansion hole 131 and the positioning hole 133 are processed, the diameter of the composite tool 30 needs to be adjusted to 66.5mm for movement, so as to avoid scratching the processed positioning hole 133 and expansion hole 131 by the composite tool 30. After moving to the specified position, the expansion slotting tool of the composite tool 30 processes the diameter of the circlip groove 132 to 74mm, thereby completing the processing of the expansion hole 131, the circlip groove 132 and the positioning hole 133.

[0048] The application adopts a servo motor to control the feeding motion, and a common motor to drive the workpiece rotation, so as to realize the hole processing of the transmission shaft flange fork 10. Two sets of servo driving systems are provided, which respectively control two servo motors, are used to accurately adjust the tool expansion amount, thereby facilitating the processing of the expansion hole 131, the positioning hole 133 and the circlip groove 132 of the transmission shaft flange fork 10.

[0049] Further, the step S20 includes steps S21-S24, and the processing method of the transmission shaft flange fork 10 sequentially executes steps S10, S21, S22, S23, S24 and S30. The steps S21-S24 will be described in detail below.

[0050] At step S21, based on the flange fork 10 being in a rotating state, the composite cutter 30 is controlled to move along the second axis direction until the first radial value of the first tool setting amount adjustment is reached, which is 34.1 mm in the embodiment, with a tolerance band of 0 mm to 0.2 mm. Therefore, the machining precision of the expanded hole 131 has certain requirements, which not only guarantees the stable positioning of the snap spring in the snap spring groove 132, but also reduces the deformation amount of the snap spring during assembly to facilitate assembly. An accurate size reference is provided for machining the expanded hole 131 to ensure that the diameter of the expanded hole 131 meets the design requirements. The second axis is perpendicular to the first axis, the first tool setting amount is the distance of the rough boring cutter 32 from the first axis, and the first radial value is the radius of the expanded hole 131.

[0051] At step S22, based on the first tool setting amount being the first radial value, the composite cutter 30 is controlled to move along the first axis until the rough boring cutter 32 processes the shaped expanded hole 131. After the tool setting amount is determined, moving along the first axis allows the rotating flange fork 10 to cooperate with the moving rough boring cutter 32 to accurately machine the expanded hole 131, ensuring the axial size precision of the expanded hole 131.

[0052] At step S23, based on the expanded hole 131 being machined, the composite cutter 30 is controlled to move along the second axis until the first tool setting amount adjustment is adjusted to the second radial value. The second radial value is the axis of the positioning hole 133, i.e., the second radial value is smaller than the first radial value. The second radius is 33.5 mm, with a tolerance band of 0.035 mm to 0.065 mm. By adjusting the tool setting amount to the radius of the positioning hole 133 again along the second axis, the size transition from the expanded hole 131 to the positioning hole 133 is realized, preparing for machining the positioning hole 133.

[0053] At step S24, based on the first tool setting amount being the second radial value, the composite cutter 30 is controlled to move along the first axis until the rough boring cutter 32 processes the shaped positioning hole 133, and the second half-finished hole machining is completed. Moving along the first axis with the adjusted tool setting amount to machine the positioning hole 133 allows the expanded hole 131 and the positioning hole 133 to join to form a stepped hole. By adjusting the tool setting amount and the moving direction step by step, the structure and size precision of the second half-finished hole are ensured, further ensuring the stability of subsequent machining.

[0054] Further, step S30 includes step S31 and step S32, and the machining method of the transmission shaft flange fork 10 sequentially executes step S10, step S20, step S31, and step S32, which will be described in detail below:

[0055] Step S31, based on the completion of the second semi-finished hole machining, the composite tool 30 is controlled to move along the first axis until the slotting cutter 33 is located at the preset slotting position of the second semi-finished hole, providing accurate axial positioning for the processing of the circlip groove 132, and ensuring that the circlip groove 132 is connected at the designed position between the expanded hole 131 and the positioning hole 133.

[0056] Step S32, based on the fact that the slotting cutter 33 is located at the preset slotting position, the composite tool 30 is controlled to move along the second axis until the second tool offset amount is a third radius value, forming the circlip groove 132, and the third semi-finished hole machining is completed; wherein the second tool offset amount is the distance between the slotting cutter 33 and the first axis, and the third radius value is the radius of the circlip groove 132. The third radius value is 37 mm, and the slotting cutter 33 has a larger head and a smaller diameter than the expanding cutter, so that the circlip groove 132 can be machined at one time, improving the machining efficiency of the circlip groove 132. By adjusting the tool offset amount of the slotting cutter 33 along the second axis to the radius of the circlip groove 132, the slotting cutter 33 can machine the circlip groove 132 with the required size at the preset position, realizing one-time machining of the circlip groove 132, ensuring the size accuracy of the circlip groove 132, and facilitating the subsequent installation of the circlip.

[0057] Further, before step S31, the hole machining method of the transmission shaft flange yoke 10 further comprises step S33, and the machining method of the transmission shaft flange yoke 10 sequentially executes steps S10, S20, S33, S31, S32.

[0058] Step S33, based on the completion of the second semi-finished hole machining, the composite tool 30 is controlled to move along the second axis until the second tool offset amount is less than the radius of the positioning hole 133. In the state of the completion of the second semi-finished hole machining, the tool shank 31 is arranged in the second semi-finished hole, and the corresponding lug 12 is located between the rough boring cutter 32 and the slotting cutter 33. By moving the composite tool 30 along the second axis before machining the circlip groove 132, the second tool offset amount is less than the radius of the positioning hole 133, which can avoid interference between the slotting cutter 33 and the inner wall of the second semi-finished hole during the movement of the slotting cutter 33 along the first axis. Meanwhile, by arranging the tool shank 31 in the second semi-finished hole and locating the lug 12 between the rough boring cutter 32 and the slotting cutter 33, stable structural support is provided for the positioning and movement of the slotting cutter 33, ensuring the safety and accuracy of the slotting process.

[0059] In other embodiments, step S30 comprises step S34, and the machining method of the transmission shaft flange yoke 10 sequentially executes steps S10, S20, S31, S32, S34, S40, which will be described in detail below:

[0060] In step S34, the third radius value is based on the second blade opening amount, and the compound tool 30 is controlled to remain stationary for a preset time length. This can ensure that the slotting tool 33 fully processes the circlip groove 132, guarantee the dimensional accuracy and surface quality of the circlip groove 132, and avoid the problem of incomplete groove body or substandard accuracy due to insufficient processing time. At the same time, it can clean the debris generated during processing in the circlip groove 132, avoid the subsequent circlip from being accurately placed in the circlip groove 132, and reduce the time for cleaning the circlip groove 132.

[0061] Further, step S30 includes step S35 and step S36, and the processing method of the transmission shaft flange fork 10 sequentially performs step S10, step S20, step S31, step S32, step S34, step S35, step S36, and step S40. The following can be described in detail for step S35 and step S36:

[0062] In step S35, based on the compound tool 30 remaining stationary for a preset time length, the compound tool 30 is controlled to move along the second axis until the first blade opening amount is less than the radius of the positioning hole 133 and the second blade opening amount is less than the radius of the expansion hole 131. This can avoid collision between the tool and the hole wall during disengagement, and protect the processed expansion hole 131, positioning hole 133, circlip groove 132, and tool. The first blade opening amount is the distance of the rough boring tool 32 from the first axis.

[0063] In step S36, based on the first blade opening amount being less than the radius of the positioning hole 133 and the second blade opening amount being less than the radius of the expansion hole 131, the compound tool 30 is controlled to move along the first axis to disengage the compound tool 30 from the flange fork 10. After ensuring that the tool blade opening amount meets the second blade opening amount being less than the radius of the expansion hole 131, moving along the first axis to disengage the compound tool 30 from the flange fork 10 realizes the orderly end of the processing process, avoids damage to the processed structure due to improper disengagement, and guarantees the integrity of the processing.

[0064] Further, when the slotting tool 33 is located at the preset slotting position, i.e., the stepped position of the second semi-finished product, the projection of the cutting edge width of the slotting tool 33 along the second axis covers the junction between the expansion hole 131 and the positioning hole 133 in the second semi-finished product hole. This can ensure that the slotting tool 33 can process the required circlip groove 132 at the junction in one cutting, guarantee the adaptability of the circlip groove 132 and the stepped hole structure, avoid position deviation of the circlip groove 132 due to insufficient cutting range, and further improve the processing accuracy and efficiency of the circlip groove 132. At the same time, it avoids the problem of the circlip being unable to be accurately positioned due to sharp corners during installation, and guarantees smooth transition of the first semi-finished product hole, the second semi-finished product hole, and the third semi-finished product hole.

[0065] Further, the hole machining method of the propeller shaft flange yoke 10 further comprises a step S40, the machining method of the propeller shaft flange yoke 10 sequentially executes the step S10, the step S20, the step S30, the step S40:

[0066] In the step S40, based on the third semi-finished product hole machining is completed, the third semi-finished product hole is precisely bored using a precise boring tool to form the bearing hole 13. In this way, the precision and surface finish of the bearing hole 13 can be improved, ensuring the fitting precision of the bearing hole 13 and the universal joint bearing, providing a reliable structural foundation for the stable assembly and efficient transmission of the subsequent universal joint.

[0067] Embodiment two:

[0068] In this embodiment, as shown in Figure 2 、 Figure 3 、 Figure 4 The hole machining device of the propeller shaft flange yoke 10 comprises a machine tool assembly 20 and a composite tool 30.

[0069] The machine tool assembly 20 comprises a workbench 21, a clamping unit, a rough boring spindle 22 and a tool head 23. The clamping unit is rotationally connected to the workbench 21 about a first axis to provide a rotating basis for machining. The clamping unit is used to clamp the flange yoke 10. The rough boring spindle 22 is slidingly connected to the workbench 21 along the first axis, and the tool head 23 is slidingly connected to the rough boring spindle 22 along a second axis. The first axis is perpendicular to the second axis, enabling the composite tool 30 to move in two perpendicular directions to meet the position adjustment requirements of different machining steps, providing structural support and motion protection for hole machining.

[0070] The composite tool 30 comprises a tool shank 31, a rough boring cutter 32 and a slotting cutter 33. The tool shank 31 is parallel to the first axis. The rough boring cutter 32 and the slotting cutter 33 are connected to the tool shank 31, integrating the rough boring cutter 32 and the slotting cutter 33 on the same tool shank 31 to reduce tool replacement and clamping frequency, improving machining efficiency. The tool shank 31 is connected to the tool head 23. The rough boring cutter 32 protrudes from the tool shank 31 along the second axis by a first height, and the slotting cutter 33 protrudes from the tool shank 31 along the second axis by a second height. The first height is less than the second height, ensuring that the rough boring cutter 32 does not interfere with the slotting cutter 33 during machining, and the slotting cutter 33 can accurately act on the target position during machining. The cutting edge of the rough boring cutter 32 has a first width along the first axis, and the cutting edge of the slotting cutter 33 has a second width along the second axis. The first width is less than the second width. This adaptation to different requirements of rough boring and slotting ensures that the stepped hole formed by rough boring and the snap spring groove 132 formed by slotting meet the size requirements, improving machining precision.

[0071] Further, the machine tool assembly 20 further comprises a fine boring spindle 24 and a sliding platform. The fine boring spindle 24 is in sliding connection with the worktable 21 along the first axis, and can drive the fine boring tool to move to complete fine boring processing of the third semi-finished product hole, thereby improving the accuracy of the hole. The sliding platform is in sliding connection with the worktable 21 along the third axis, and can adjust the position of the clamping unit and the flange fork 10 in the third axis direction, thereby increasing the flexibility of the adjustment of the processing position; the third axis is perpendicular to the first axis and the second axis, respectively; the clamping unit is in rotary connection with the sliding platform around the first axis, thereby ensuring the stability of the rotary processing of the flange fork 10, and the multi-directional motion adjustment cooperation further improves the adaptability of the device to different processing requirements.

[0072] Those skilled in the art can understand that the above-mentioned embodiments are specific cases for implementing the present disclosure, and in actual application, various changes can be made in form and details without departing from the scope of the present disclosure.

Claims

1. A method for machining holes in a drive shaft flange fork, characterized in that, The method for machining the hole in the drive shaft flange fork includes: Based on the clamping of the flange fork, the flange fork is controlled to rotate around the first axis; wherein, the flange fork includes an integrally formed flange body and two lugs; the lugs are provided with a first semi-finished product hole; the first axis coincides with the axis of the first semi-finished product hole; Based on the rotating flange fork, the composite tool is controlled to move, thereby enlarging the first semi-finished hole to form a second semi-finished hole using a rough boring tool; wherein, the composite tool includes a tool holder, a rough boring tool, and a grooving tool; the rough boring tool and the grooving tool are respectively connected to the tool holder; the second semi-finished hole includes an expansion hole and a positioning hole; the diameter of the expansion hole is larger than the diameter of the positioning hole; the expansion hole is connected to the positioning hole; the diameter of the positioning hole is larger than the diameter of the first semi-finished hole; Based on the completion of the second semi-finished hole, the composite tool is controlled to move so as to process a snap ring groove in the second semi-finished hole through a grooving tool to form a third semi-finished hole; the snap ring groove connects between the expansion hole and the positioning hole; the diameter of the snap ring groove is larger than the diameter of the expansion hole; The process of machining the second semi-finished hole, controlling the movement of the composite tool to machine a snap ring groove in the second semi-finished hole using a grooving tool, to form a third semi-finished hole, includes: Based on the completion of the second semi-finished hole processing, the composite tool is controlled to move along the first axis until the grooving tool is located at the preset grooving position of the second semi-finished hole; Based on the grooving cutter being located at the preset grooving position, the composite cutter is controlled to move along the second axis until the second cutting amount is equal to the third radius value, thereby forming the snap ring groove and completing the machining of the third semi-finished hole; wherein, the second cutting amount is the distance by which the grooving cutter deviates from the first axis; and the third radius value is the radius of the snap ring groove; The method for machining the hole in the drive shaft flange fork also includes: Based on the second blade extension amount being the third radius value, the composite tool is controlled to remain stationary for a preset duration; The method for machining the hole in the drive shaft flange fork also includes: Based on the fact that the composite tool remains stationary for the preset time, the composite tool is controlled to move along the second axis until the first tool extension amount is less than the radius of the positioning hole and the second tool extension amount is less than the radius of the expansion hole; wherein, the first tool extension amount is the distance that the rough boring tool deviates from the first axis; Based on the fact that the first blade extension amount is less than the radius of the positioning hole and the second blade extension amount is less than the radius of the expansion hole, the composite tool is controlled to move along the first axis so that the composite tool disengages from the flange fork.

2. The method for machining holes in a transmission shaft flange fork according to claim 1, characterized in that, The step of controlling the movement of the composite tool based on the rotating flange fork to enlarge the first semi-finished hole to form the second semi-finished hole using a rough boring tool includes: Based on the fact that the flange fork is in a rotating state, the composite tool is controlled to move along the second axis until the first tool spread is adjusted to the first radius value; wherein, the second axis is perpendicular to the first axis; the first tool spread is the distance that the rough boring tool deviates from the first axis; the first radius value is the radius of the expanded hole; Based on the first spread amount being the first radius value, the composite tool is controlled to move along the first axis until the rough boring tool forms the expanded hole; Based on the completion of the expanded hole machining, the composite tool is controlled to move along the second axis until the first tool spreading amount is adjusted to the second radius value; wherein the second radius value is the axis of the positioning hole; Based on the first tool extension amount being the second radius value, the composite tool is controlled to move along the first axis until the rough boring tool forms the positioning hole, and the second semi-finished hole is completed.

3. The method for machining holes in a transmission shaft flange fork according to claim 1, characterized in that, Before the second semi-finished product hole is machined and the composite tool is moved along the first axis until the grooving tool is located at the preset grooving position of the second semi-finished product hole, the hole machining method of the drive shaft flange fork further includes: Based on the completion of the second semi-finished hole machining, the composite tool is controlled to move along the second axis until the second tool extension is less than the radius of the positioning hole; in the state where the second semi-finished hole machining is completed, the tool holder passes through the second semi-finished hole, and the corresponding lug is located between the rough boring tool and the grooving tool.

4. The method for machining holes in a transmission shaft flange fork according to claim 1, characterized in that, When the grooving tool is located at the preset grooving position, the projection of the cutting edge width of the grooving tool along the second axis covers the connection between the expansion hole and the positioning hole in the second semi-finished product hole.

5. The method for machining holes in a transmission shaft flange fork according to claim 1, characterized in that, The method for machining the hole in the drive shaft flange fork also includes: After the third semi-finished hole is machined, a precision boring tool is used to precision bore the third semi-finished hole to form a bearing hole.

6. A hole-machining apparatus for a drive shaft flange fork, applied to the hole-machining method for the drive shaft flange fork according to any one of claims 1-5, characterized in that, The hole machining device for the drive shaft flange fork includes: A machine tool assembly includes a worktable, a clamping unit, a roughing spindle, and a tool setter; the clamping unit is rotatably connected to the worktable about a first axis; the clamping unit is used to clamp a flange fork; the roughing spindle is slidably connected to the worktable along the first axis; the tool setter is slidably connected to the roughing spindle along a second axis; the first axis is perpendicular to the second axis. A composite cutting tool includes a tool holder, a roughing boring tool, and a grooving tool; the tool holder is parallel to a first axis; the roughing boring tool and the grooving tool are respectively connected to the tool holder; the tool holder is connected to a tool-unfolding head; the roughing boring tool protrudes from the tool holder along the second axis by a first height; the grooving tool protrudes from the tool holder along the second axis by a second height; the first height is less than the second height; the width of the cutting edge of the roughing boring tool along the first axis is a first width; the width of the cutting edge of the grooving tool along the second axis is a second width; the first width is less than the second width.

7. The hole machining device for a transmission shaft flange fork according to claim 6, characterized in that, The machine tool assembly further includes a precision boring spindle and a sliding platform; the precision boring spindle is slidably connected to the worktable along the first axis; the sliding platform is slidably connected to the worktable along a third axis; the third axis is perpendicular to the first axis and the second axis respectively; the clamping unit is rotatably connected to the sliding platform about the first axis.

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