High-precision internal spline finish machining equipment

Abstract

The invention relates to the technical field of spline machining, in particular to high-precision internal spline finish machining equipment. Comprising a workbench, a cutter clamping mechanism and a workpiece clamping mechanism. The tool clamping mechanism comprises a fixing plate, a stand column, a tool base, a tool assembly and a driving assembly. The tool assembly comprises a tool post and a tool bit. A connecting piece is further arranged between the tool post and the connecting pipe, so that the tool and the tool base can be sealed, fastened and installed through preset fastening force, and the tool can be conveniently and rapidly disassembled; the driving assembly is configured to drive the fixing plate to move by a preset distance and complete the grinding operation that the tool bit is axially fed to the spline workpiece in a reciprocating mode. The workpiece clamping mechanism comprises a supporting plate, a mounting base, a three-jaw chuck and a feeding assembly. The feeding assembly is configured to drive the supporting plate to move leftwards by a preset distance to reach the designated grinding position of the cutter so as to complete grinding operation of the cutter on the spline workpiece. The device is reasonable in structural design, the deformation coping effect of the internal spline of the workpiece after heat treatment deformation is improved, and the precision of the internal spline of the workpiece is improved.

Description

Technical Field

[0001] The invention relates to the technical field of spline processing, and in particular to high-precision internal spline finishing equipment. Background Art

[0002] With the vigorous development of electric vehicles, the amount of motor shafts used in drive motors has increased, and the connection for the motor to drive the gearbox to rotate is mostly a spline connection, which requires high precision. Therefore, strict precision control requirements are placed on internal spline products. In actual gear processing, spline processing is particularly troublesome. For workpieces with internal splines, the splines will deform after heat treatment, the dimensions will be out of tolerance, the precision will be low, and the use requirements will not be met. As for the deformation problem of the internal splines of internal spline products, especially blind internal splines, there is currently no effective processing method. The industry generally uses specially designed tooling in the heat treatment process to reduce the deformation problem of heat treatment, but the precision still cannot meet the use requirements. The present invention provides a high-precision internal spline finishing equipment, which is used for deformation grinding of the internal splines of workpieces after heat treatment deformation, and improves the precision of the internal splines of the workpiece to meet the needs of application in the motor industry. Summary of the invention

[0003] In order to solve the above-mentioned shortcomings and deficiencies of the existing internal spline products in the prior art, such as low spline deformation accuracy after heat treatment, the present invention provides a high-precision internal spline finishing equipment with reasonable structural design, which is used for deformation grinding of the internal spline of the workpiece after heat treatment deformation, and improves the internal spline accuracy of the workpiece to meet the application requirements of the motor industry.

[0004] The present invention adopts the following technical solutions to achieve the above purpose: A high-precision internal spline finishing equipment, comprising a workbench, a tool clamping mechanism, and a workpiece clamping mechanism; the workbench is distributed on the left and right; the tool clamping mechanism comprises a fixed plate, a column, a tool seat, a tool assembly and a driving assembly; the fixed plate is horizontally distributed on the workbench, the column is fixedly installed on the fixed plate by bolts, and the column is provided with a mounting hole that passes through the left and right, and an infusion tube is adapted to be installed at the mounting hole, and the infusion tube is kept distributed on the left and right; the tool seat is adapted to be installed at the right end of the mounting hole, and a connecting tube is provided at the center; the tool assembly comprises a tool column and a tool head; the tool columns are distributed on the left and right, the tool head is arranged at one end of the tool column, and the outer wall is provided with Cutting teeth adapted for spline processing; the diameter of the cutting column is smaller than the diameter of the cutting head, the two are an integrally formed structure, and a coolant channel is provided at the center of the two, and the cutting head is provided with a through hole that is evenly distributed in an annular shape and communicates with the coolant channel; a connecting piece is also provided between the cutting column and the connecting pipe, so that the cutting tool can complete the sealing and fastening installation operation with the cutting tool seat with a preset fastening force, and can be easily disassembled; the driving assembly is used to drive the fixing plate to move a preset distance, and complete the grinding operation of reciprocating axial feed of the cutting head to the spline workpiece; the workpiece clamping mechanism is used to complete the clamping of the workpiece spline while driving the workpiece spline to rotate, and can drive the workpiece spline to move left by a preset distance to reach the specified grinding position of the tool.

[0005] As a preferred technical solution: the workbench includes a table top and a support base; the table top is horizontally distributed at the upper end of the support base; the interior of the support base is a hollow structure, and the inner cavity of the support base is divided into a plurality of evenly distributed storage cavities through criss-cross partitions, which are used to store spline parts to be processed and processing tools; scale lines are also provided at the table top corresponding to the support plate, and the scale lines are distributed left and right.

[0006] A further preferred technical solution: the infusion tube input end is connected to a cooling tube, and the output end is connected to the connecting tube; the infusion tube is fixedly installed in the mounting hole, the tool seat is connected to the mounting hole by threads, and a rubber sealing ring is also provided at the connection between the two.

[0007] A further preferred technical solution is that a spiral groove is further provided on the cutter head, and a superhard material coating is further coated on the outer surface of the cutter teeth.

[0008] A further preferred technical solution: the connecting part includes a connecting head, a limit block, a compression spring, and an elastic rubber ring; the connecting head is a hollow structure, and the outer diameter is consistent with the outer diameter of the knife column, and the two are an integrally formed structure; an ear stopper is also provided at the connection between the connecting head and the knife column for squeezing the elastic rubber ring; the limit block is arranged at the end of the connecting head, and there are at least two of them evenly distributed in a ring shape; an annular groove is provided on the outer side surface of the connecting tube, the compression spring is arranged in the annular groove, and the inner end is connected to the side wall of the annular groove, and the outer end is connected to the elastic rubber ring; the inner side wall of the connecting tube is also provided with a connecting groove adapted to the movement of the limit block, and the connecting groove includes a straight groove, an arc groove and a transverse groove distributed from the outside to the inside; a limit hole adapted to the limit block structure is provided at the transverse groove.

[0009] A further preferred technical solution: the outer diameter of the connector is equal to the inner diameter of the connecting tube; in the initial state, the compression spring naturally stretches, and the distance H between the outer end surface of the elastic rubber ring and the outer end surface of the connecting tube is three times the thickness L of the elastic rubber ring.

[0010] A further preferred technical solution is as follows: the length of the straight groove is 1.5L, the length of the arc groove in the axial direction is L; the depth of the limiting hole is (0.2-0.5) L, so that the limiting block of the tool assembly first moves along the straight groove and then along the arc groove until it enters the limiting hole in the transverse groove, completing the locking and tightening operation of the tool and the tool seat.

[0011] A further preferred technical solution: the driving assembly includes a movable rail, a first movable seat, a first motor, a rotating wheel, and a connecting arm; the movable rail is extended left and right and distributed on the table top, and there are two of them symmetrically distributed front and back; the first movable seat is fixedly installed on the fixed plate, and a first movable groove is opened at the lower end, and the movable rail is installed in a matching manner with the first movable groove; the first motor is fixedly installed on the table top through a bracket, and is located on the left side of the fixed plate; the rotating wheel is sleeved and installed on the output shaft of the first motor, and a first rotating column is also provided on the lower end surface; a second rotating column is also provided on the lower end surface of the fixed plate, and one end of the rotating wheel is rotatably connected to the first rotating column, and the other end is rotatably connected to the second rotating column.

[0012] A further preferred technical solution: the workpiece clamping mechanism includes a support plate, a mounting seat, a three-jaw chuck and a feed assembly; the support plates are arranged on the workbench in a left-right distribution and are located on the right side of the fixed plate; the mounting seats are vertically distributed and installed on the support plate; the three-jaw chuck is arranged on the mounting seat to complete the fastening operation of the spline workpiece; a transmission plate is also provided on one side of the three-jaw chuck, and the transmission plate and the mounting seat are kept in relative rotation through keyway cooperation, and the right end of the transmission plate is connected to the rotating shaft, and a rotary motor is also provided on one side of the mounting seat, and the output shaft of the rotary motor is connected to the rotating shaft to drive the workpiece spline to rotate; the three-jaw chuck keeps the center consistent with the tool head; the feed assembly is used to drive the support plate to move left by a preset distance to reach the specified grinding position of the tool to complete the tool grinding operation on the spline workpiece.

[0013] A further preferred technical solution: the feed assembly includes a second movable seat, a second motor, an auxiliary plate, a rotating screw, and a connecting seat; the second movable seat is arranged on the support plate, and a second movable groove is opened on the lower end surface, and the second movable groove is matched and installed with the movable rail; the second motor is fixedly arranged at the right end of the table top, and the two auxiliary plates are distributed on the left and right, and are respectively located on the left and right sides of the support plate; the rotating screw passes through the auxiliary plate on the right side and extends to the left side of the auxiliary plate, and bearings are provided at the connection between the rotating screw and the auxiliary plate, and the right end of the rotating screw is connected to the second motor; the connecting seat is arranged on the lower end surface of the support plate, and maintains a threaded rotation connection with the rotating screw.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the structural design of the finishing equipment is reasonable, and the equipment adopts the principle of forming grinding by reciprocating grinding of a forming tool adapted to the spline shape. The number of teeth of the tool is the same as the number of teeth of the workpiece, and superhard material is used to coat the surface of the tool teeth for grinding, so the tool is durable and low in cost; the positive and reverse rotation angles of the forming tool and the workpiece are used as the grinding feed, and the axial reciprocating motion of the tool is used for grinding; the grinding amount, feed speed and workpiece tooth surface size are precisely controlled and can be precisely adjusted under the drive of a servo motor; at the same time, the center of the spline workpiece coincides with the center of the grinding tool, which ensures the concentricity of the internal spline during grinding, and the radial runout of the workpiece is effectively guaranteed; after the forming tool enters the spline, the grinding amount of the two tooth surfaces of the spline inside the workpiece can be precisely adjusted, which well ensures the size requirements of the spline span, and the accuracy can reach within level 5, which fully meets the product's use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention; Figure 2 It is a top view of the overall structure of the present invention; Figure 3 It is a front view of the overall structure of the present invention; Figure 4 is an enlarged view of the tool clamping mechanism of the present invention; Figure 5 It is a cross-sectional structural diagram of a column of the present invention; Figure 6 for Figure 5 A magnified view of the structure of part A; Figure 7 A partial cross-sectional view of the connecting pipe of the present invention; Figure 8 It is a partial structural schematic diagram of the tool assembly of the present invention; Fig. 9 It is a partial structural diagram of the driving assembly of the present invention; Fig.10 It is a partial structural stereogram of the feeding assembly of the present invention.

[0017] In the figure: 1, workbench; 11, table; 12, support seat; 13, partition; 14, storage cavity; 15, scale line; 2, tool clamping mechanism; 21, fixing plate; 22, column; 221, mounting hole; 23, tool seat; 24, tool assembly; 241, tool column; 242, tool head; 243, tool teeth; 244, coolant channel; 245, through hole; 246, spiral groove; 247, superhard material coating; 25, drive assembly; 251, moving rail; 252, first moving seat; 253, first motor; 254, rotating wheel; 255, connecting arm; 256, first moving groove; 257, first rotating column; 258, second rotating column; 2 6. Infusion tube; 27. Connecting tube; 28. Cooling tube; 29. ​​Rubber sealing ring; 3. Workpiece clamping mechanism; 31. Support plate; 32. Mounting seat; 33. Three-jaw chuck; 34. Feed assembly; 341. Second moving seat; 342. Second motor; 343. Auxiliary plate; 344. Rotating screw; 345. Connecting seat; 346. Second moving groove; 35. Transmission plate; 36. Rotating shaft; 37. Rotating motor; 4. Connecting piece; 41. Connecting head; 42. Limiting block; 43. Compression spring; 44. Elastic rubber ring; 45. Ring groove; 46. Connecting groove; 461. Straight groove; 462. Arc groove; 463. Horizontal groove; 47. Limiting hole; 48. Ear stop. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] It should be noted that, in the specific implementation of the present invention, the possible terms such as "first" and "second" and other relational terms are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the possible terms such as "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the possible statements "including one" and other defined elements do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.

[0020] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "provided with" that may appear should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0021] Example 1: Figures 1 to 10 As shown: A high-precision internal spline finishing equipment includes a workbench 1, a tool clamping mechanism 2, and a workpiece clamping mechanism 3. The finishing equipment has a reasonable structural design. The equipment uses a reciprocating grinding method of a forming tool adapted to the spline shape to shape the workpiece spline, thereby improving the precision of spline processing. The workbench 1 is distributed on the left and right to provide a good support effect. Among them, Figure 1 As shown in the figure, the tool clamping mechanism 2 includes a fixing plate 21, a column 22, a tool seat 23, a tool assembly 24 and a driving assembly 25. The fixing plate 21 is horizontally arranged on the workbench 1, and specifically, the fixing plate is located on the left side of the workbench. The column 22 is fixedly mounted on the fixing plate 21 by bolts, and a mounting hole 221 is provided in the column 22, which is through the left and right sides. Figure 5 As shown: the installation hole 221 is adapted to be installed with an infusion tube 26, and the infusion tube 26 is distributed on the left and right; the purpose of such a setting is not only to provide an installation position for the tool, but also to adapt to the installation of a pipeline for conveying coolant based on the requirements of special structural tools, with a compact structure and reasonable design. The tool seat 23 is adapted to be installed at the right end of the installation hole 221. The tool seat is circular, and a connecting tube 27 is provided at the center. The input end of the infusion tube 26 is connected to a cooling tube 28 through a pipe valve joint, and the output end is connected to the connecting tube 27; to ensure the stability and smoothness of the coolant delivery. The infusion tube 26 is fixed to the installation hole 221 by bolts, and the tool seat 23 is connected to the installation hole 221 by threads, and a rubber sealing ring 29 is also provided at the connection between the two. For specific reference Figure 2 The purpose of such a setting is to ensure that the tool holder is connected and fixed, not only to ensure the sealing effect of coolant delivery, but also to facilitate disassembly and maintenance work, saving time and effort.

[0022] like Figure 3 As shown: In a preferred technical solution of this embodiment, the driving assembly 25 is used to drive the fixing plate 21 to move a preset distance and complete the grinding operation of the cutter head 242 reciprocating axial feed to the spline workpiece. Specifically, as Figure 1 and Figure 4As shown: the driving assembly 25 includes a movable rail 251, a first movable seat 252, a first motor 253, a rotating wheel 254, and a connecting arm 255. The movable rail 251 is extended left and right and distributed on the table 11, and there are two of them symmetrically distributed front and back, wherein the movable rail is fixed to the workbench by bolts. The first movable seat 252 is fixedly installed on the fixed plate 21, and a first movable groove 256 is opened at the lower end. The first movable seat and the fixed plate can be fixed by welding. The movable rail 251 is matched with the first movable groove 256 and installed; the purpose of such a setting is to ensure that the fixed plate and the movable seat as a whole can move left and right along the movable rail, providing a strong foundation for the subsequent reciprocating grinding operation of the workpiece spline by the tool. As shown Fig. 9 As shown: the first motor 253 is fixedly installed on the table 11 through a bracket and is located on the left side of the fixed plate 21; wherein the first motor adopts a servo control motor for easy and precise control. The rotating wheel 254 is sleeved and installed on the output shaft of the first motor 253, and a first rotating column 257 is also provided on the lower end surface. A second rotating column 258 is also provided on the lower end surface of the fixed plate 21, and one end of the rotating wheel 254 is rotatably connected to the first rotating column 257, and the other end is rotatably connected to the second rotating column 258; specifically, the keyway can be matched to maintain a relatively rotatable position relationship.

[0023] With such a configuration, the start of the first motor will drive the rotating wheel to rotate synchronously, because the connecting arm maintains a rotational connection with the two rotating columns. Therefore, the position change of the first rotating column on the rotating wheel will drive the connecting arm to deflect. Under the cooperation of the moving rail and the first moving groove, the overall movement of the fixed plate and the first moving seat has a good guiding effect. As for the second rotating column, there is only reciprocating movement in the axial direction (left and right direction of the workbench), so under the driving operation of the first motor, the fixed plate and the moving seat will be driven to reciprocate left and right as a whole, that is, the tool will be driven to reciprocate left and right, thereby completing the grinding process of the spline workpiece heat treatment deformation size.

[0024] like Figure 4 and Figure 8 As shown: In a preferred technical solution of this embodiment, the tool assembly 24 includes a tool column 241 and a tool head 242. The tool column 241 is distributed on the left and right. Figure 1 Direction of installation. Figure 8 The knife column 241 is arranged at one end of the knife column 241, and the outer wall is provided with a knife tooth 243 adapted for spline processing; the number of teeth of the knife tooth is consistent with the number of teeth of the spline workpiece. The diameter of the knife column 241 is smaller than the diameter of the knife head 242, and the two are an integrally formed structure, and a coolant channel 244 is provided at the center of the two, and a through hole 245 is provided on the knife head 242 that is evenly distributed in an annular shape and communicates with the coolant channel 244; refer to Figure 5 and Figure 6 The structure shown. The purpose of such a setting is to facilitate the cooling of the tool (cutter head) by the coolant entering the coolant channel through the infusion tube, firstly to prevent the cutter head from having adverse problems caused by temperature rise during the grinding operation; at the same time, the ground particles can be taken away by conveying the coolant, further ensuring the safety needs and precision requirements of the processing. A spiral groove 246 is also provided on the cutter head 242. Such a setting facilitates the outward transportation of impurities such as the ground particles along the spiral groove. And the outer surface of the cutter tooth 243 is also coated with a superhard material coating 247. The purpose of such a setting is to increase the processing hardness of the cutter tooth. At the same time, the cutter head itself is made of CBN material.

[0025] With such a configuration, the equipment uses the principle of reciprocating grinding of a forming tool that is adapted to the spline shape to perform forming grinding. The number of teeth of the tool is the same as the number of teeth of the workpiece. At the same time, superhard materials are used to coat the surface of the tool teeth for grinding. The tool is durable and low in cost. The positive and negative rotation angles between the forming tool and the workpiece are used as the grinding feed, and the axial reciprocating motion of the tool is used for grinding. The grinding amount, feed speed and workpiece tooth surface size are precisely controlled and can be precisely adjusted under the drive of a servo motor. Preferably, this embodiment can not only complete the finishing processing of straight gear internal splines, but also use helical gear tools to complete the processing of helical gear internal splines.

[0026] like Figure 3 As shown: In a preferred technical solution of this embodiment, a connecting piece 4 is further provided between the knife column 241 and the connecting pipe 27, so that the knife can be sealed and fastened to the knife seat 23 with a preset fastening force, and can be easily disassembled. Specifically, as Figure 6 As shown: the connector 4 includes a connector 41, a limit block 42, a compression spring 43, and an elastic rubber ring 44. The connector 41 is a hollow structure, and its outer diameter is consistent with the outer diameter of the knife column 241. The two are an integrally formed structure, and the inner cavity of the connector is connected to the coolant channel. The connection between the connector 41 and the knife column 241 is also installed with an ear stopper 48 by welding. The ear stopper is an annular structure for squeezing the elastic rubber ring. The limit block 42 is set at the end of the connector 41, and there are at least two of them evenly distributed in an annular shape; as shown Figure 7 As shown, preferably, the limit blocks and the connecting grooves are matched and installed in four groups, that is, the limit blocks are four distributed in a ring.

[0027] like Figure 7As shown: wherein, an annular groove 45 is provided on the outer side of the connecting tube 27, the compression spring 43 is arranged in the annular groove 45, and the inner end is connected to the side wall of the annular groove 45, and the outer end is connected to the elastic rubber ring 44; the elastic rubber ring is also an annular structure. When the tool is connected to the tool seat, the compression spring is completely retracted into the annular groove. The elastic force of the compression spring is large enough. The inner side wall of the connecting tube 27 is also provided with a connecting groove 46 adapted to the movement of the limit block 42, and the connecting groove 46 includes a straight groove 461, an arc groove 462 and a transverse groove 463 distributed from the outside to the inside. A limiting hole 47 adapted to the structure of the limit block 42 is also provided at the transverse groove 463. The outer diameter of the connecting head 41 is equal to the inner diameter of the connecting tube 27; such a configuration facilitates matching installation.

[0028] In the initial state, the compression spring 43 stretches naturally, and the distance H between the outer end face of the elastic rubber ring 44 and the outer end face of the connecting tube 27 is three times the thickness L of the elastic rubber ring 44. That is, the distance between the inner end face of the elastic rubber ring and the outer end face of the connecting tube is 2L. Similarly, the elastic rubber ring begins to be compressed after moving inward by a length of 2L. In a preferred embodiment, the length of the straight groove 461 is 1.5L, and the length of the arc groove 462 in the axial direction is L. The depth of the limiting hole 47 is (0.2-0.5) L, and the depth of the limiting hole 47 is preferably 0.3L. During the connection and installation process of the connector and the connecting tube, the limiting block 42 of the tool assembly 24 first moves along the straight groove 461 and then along the arc groove 462 until it enters the limiting hole 47 in the transverse groove 463, completing the locking and tightening operation of the tool and the tool seat 23. During this process, according to the length requirements of each groove of the connecting groove and the thickness design of the elastic rubber ring, when the limit block reaches the transverse groove, the compression spring is completely compressed into the annular groove, and the elastic rubber ring is compressed by 0.5L. At this time, both the compression spring and the elastic rubber ring have stored energy. When the limit block continues to move along the transverse groove to the position of the limit hole, the "stored energy" of the compression spring and the elastic rubber ring will be released, thereby forming a clamping and locking state between the limit block and the limit hole. In this state, the corresponding tool assembly structure can be ground normally. When a different tool assembly structure needs to be replaced, the staff needs to forcefully drive the cutter head to move in the direction of the tool seat, that is, to "unlock" the limit block and the limit hole, and then rotate the cutter head in the opposite direction to separate the connector from the connecting pipe.

[0029] like Figure 1As shown: In a preferred technical solution of this embodiment, the workpiece clamping mechanism 3 includes a support plate 31, a mounting seat 32, a three-jaw chuck 33 and a feed assembly 34. Specifically, the support plate 31 is arranged on the workbench 1 in a left-right distribution, and is located on the right side of the fixed plate 21; both are arranged on the movable rail. The mounting seat 32 is vertically distributed and installed on the support plate 31, and the two can be fixed by welding connection. The three-jaw chuck 33 is arranged on the mounting seat 32, and is used to complete the tightening operation of the spline workpiece; the three-jaw chuck is connected to a driving device, so that the three jaws can be opened and contracted for tightening; this part is a prior art, so it will not be repeated. As Figure 3 As shown: At the same time, a transmission plate 35 is also provided on one side of the three-jaw chuck 33. The transmission plate 35 and the mounting seat 32 are matched through keyways to keep relative rotation but not relative movement. The right end of the transmission plate 35 is connected to a rotating shaft 36, which passes through the mounting seat and is distributed on the left and right. A rotary motor 37 is also provided on one side of the mounting seat 32. The output shaft of the rotary motor 37 is connected to the rotating shaft to drive the workpiece spline to rotate. The rotary motor also adopts a servo control motor. The three-jaw chuck 33 described in this invention keeps the center consistent with the cutter head 242, which is convenient for the spline grinding process.

[0030] like Figure 1 As shown: wherein the feeding assembly 34 is used to drive the support plate 31 to move to the left by a preset distance to reach the designated grinding position of the tool to complete the grinding operation of the tool on the spline workpiece. Specifically, as Figure 3 As shown: the feeding assembly 34 includes a second moving seat 341, a second motor 342, an auxiliary plate 343, a rotating lead screw 344, and a connecting seat 345. The second moving seat 341 is arranged on the support plate 31, and the two can be fixed by welding. A second moving groove 346 is provided on the lower end surface of the second moving seat, and the second moving groove 346 is matched and installed with the moving rail 251; the purpose of such arrangement is to ensure that the second moving seat and the supporting plate as a whole can only move left and right along the moving rail. The second motor 342 is fixedly arranged at the right end of the table 11, wherein the second motor also adopts a servo control motor. There are two auxiliary plates 343 distributed on the left and right, and they are respectively located on the left and right sides of the support plate 31. The rotating lead screw 344 passes through the right auxiliary plate 343 and extends to the left to the left auxiliary plate 343, and the connection between the rotating lead screw 344 and the auxiliary plate 343 is provided with a bearing, so that the smoothness of the rotating lead screw is ensured. The right end of the rotating lead screw 344 is connected to the second motor 342. The connection seat 345 is disposed on the lower end surface of the support plate 31 and is threadedly connected to the rotating screw 344. Fig.10 The structure shown.

[0031] With such an arrangement, the start of the second motor will drive the rotating lead screw to rotate synchronously. Specifically, the forward rotation of the second motor will drive the rotating lead screw to rotate clockwise, forming a "lead screw nut structure" between the rotating lead screw and the connecting seat, and then the clockwise rotation of the rotating lead screw will drive the connecting seat to move to the left, that is, drive the workpiece spline under the three-jaw chuck to move closer to the tool, so that the workpiece spline and the tool head reach an appropriate grinding position. In this process, the cooperation between the movable rail and the second movable seat has a good guiding effect, thereby ensuring the stability of the overall movement of the connecting seat and the support plate. The reverse rotation of the second motor will drive the rotating lead screw to rotate counterclockwise, and then drive the connecting seat to move to the right, that is, drive the workpiece spline under the three-jaw chuck away from the tool.

[0032] The working principle of the present invention is as follows: first, the workpiece spline is installed on the hollow three-jaw chuck, and the initial tightening operation is completed. The second motor is turned on to rotate forward to drive the workpiece spline to move closer to the tool direction, so that the tool can smoothly enter the workpiece spline. At the same time, the feed position is adjusted, and when the workpiece is clamped, the tooth surface of one side of the spline in the workpiece is close to the tooth surface of the tool, and then the three-jaw chuck is clamped to complete the final tightening operation of the workpiece spline. Then the tool starts to reciprocate in the axial direction (left and right direction) according to the adjusted reciprocating position, and the first motor drives the fixed plate, the tool seat and the tool structure as a whole through the connecting arm. Then, while the tool (tool head) reciprocates, the rotary motor can drive the workpiece spline to rotate and feed in the grinding direction close to the tooth surface according to the grinding parameters, and at the same time, coolant is fed to start tooth surface grinding. After reaching the set grinding amount, the rotary motor drives the workpiece to rotate in the opposite direction to grind the tooth surface on the other side. After reaching the set grinding position, the workpiece slide withdraws, completing a grinding process. This grinding method can achieve high spline accuracy due to its simple grinding amount setting, high repeatability and high concentricity. At the same time, the overall processing tool is a hollow external spline shape, the number of teeth on the tool teeth is the same as the number of teeth on the workpiece, the tool tooth surface is coated with superhard material particles as the grinding surface, and the normal line of the tool tooth surface width is smaller than the internal spline of the workpiece to ensure that the tool can smoothly enter the internal spline part of the workpiece. The tool is fixedly installed on the hollow spindle of the tool, and coolant can be transported inside to cool the heat of the grinding workpiece and take away the grinding particles.

[0033] Example 2: Figure 1 As shown, on the basis of Example 1, a high-precision internal spline finishing equipment also includes: the workbench 1 includes a table top 11 and a support seat 12. The table top 11 is horizontally distributed and arranged on the upper end of the support seat 12; the support seat is installed on the ground. The interior of the support seat 12 is a hollow structure, and the inner cavity of the support seat 12 is divided into a plurality of evenly distributed storage cavities 14 through criss-cross partitions 13, which are used to hold and store the spline parts to be processed and processing tools. Such a setting makes rational use of space, and the partition structure is reasonably designed, which is convenient for storing workpieces and maintenance tools, and improves work efficiency.

[0034] Example 3: Figure 1 As shown: Based on Example 2, a high-precision internal spline finishing equipment further includes: a scale line 15 is further provided at the table 11 corresponding to the support plate 31, and the scale line 15 is distributed left and right. The purpose of such a setting is to provide a reference for the distance of the workpiece spline moving in the direction of the tool, which is convenient for the staff to observe and provides a strong basis for the subsequent tool teeth to grind the workpiece spline deformation.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-precision internal spline finishing equipment, characterized in that: The invention comprises a workbench (1), a tool clamping mechanism (2), and a workpiece clamping mechanism (3); the workbench (1) is distributed on the left and right; the tool clamping mechanism (2) comprises a fixing plate (21), a column (22), a tool seat (23), a tool assembly (24), and a driving assembly (25); the fixing plate (21) is horizontally distributed on the workbench (1); the column (22) is fixedly mounted on the fixing plate (21); a mounting hole (221) which passes through the left and right is provided in the column (22); a liquid infusion tube (26) is adapted to be mounted at the mounting hole (221); the tool seat (23) is adapted to be mounted on the mounting hole (221), and a connecting tube (27) is provided at the center; the tool assembly (24) comprises a tool post (241) and a tool head (242); the tool post (241) is distributed on the left and right, and the tool head (242) is arranged on the tool post (241). 1), and the outer wall is provided with a cutter tooth (243) adapted for spline processing; the diameter of the cutter column (241) is smaller than the diameter of the cutter head (242), and a coolant channel (244) is provided at the center of the two, and the cutter head (242) is provided with a through hole (245) which is evenly distributed in an annular shape and communicates with the coolant channel (244); a connecting piece (4) is also provided between the cutter column (241) and the connecting pipe (27), so that the cutter can complete the sealing and fastening installation operation with the cutter seat (23) with a preset fastening force, and can be easily disassembled; the driving assembly (25) is used to drive the fixing plate (21) to move a preset distance, and complete the grinding operation of reciprocating axial feeding of the cutter head (242) to the spline workpiece; the workpiece clamping mechanism (3) is used to complete the clamping of the workpiece spline while driving the workpiece spline to perform a rotational motion, and can drive the workpiece spline to move left by a preset distance to reach the tool specified grinding position.

2. A high-precision internal spline finishing equipment as claimed in claim 1, characterized in that: The workbench (1) comprises a tabletop (11) and a support base (12); the tabletop (11) is horizontally arranged at the upper end of the support base (12); the interior of the support base (12) is a hollow structure, and the inner cavity of the support base (12) is divided into a plurality of evenly distributed storage cavities (14) by crisscrossing partitions (13) for storing spline parts to be processed and processing tools; scale lines (15) are also provided at the tabletop (11) corresponding to the support plate (31), and the scale lines (15) are distributed left and right.

3. A high-precision internal spline finishing equipment as claimed in claim 2, characterized in that: The infusion tube (26) has an input end connected to a cooling tube (28) and an output end connected to the connecting tube (27). The infusion tube (26) is fixedly mounted on the mounting hole (221). The tool holder (23) is connected to the mounting hole (221) via threads, and a rubber sealing ring (29) is provided at the connection between the two.

4. A high-precision internal spline finishing equipment as claimed in claim 3, characterized in that: A spiral groove (246) is also provided on the cutter head (242), and a superhard material coating (247) is also coated on the outer surface of the cutter teeth (243).

5. A high-precision internal spline finishing equipment as claimed in claim 4, characterized in that: The connecting member (4) comprises a connecting head (41), a stopper (42), a compression spring (43), and an elastic rubber ring (44); the connecting head (41) is a hollow structure, and its outer diameter is consistent with the outer diameter of the knife column (241), and the two are an integrally formed structure; an ear stopper (48) is also provided at the connection between the connecting head (41) and the knife column (241) for squeezing the elastic rubber ring (44); the stopper (42) is provided at the end of the connecting head (41), and is at least two evenly distributed in an annular shape; the connecting pipe (27) An annular groove (45) is provided on the outer side surface, the compression spring (43) is arranged in the annular groove (45), and the inner end is connected to the side wall of the annular groove (45), and the outer end is connected to the elastic rubber ring (44); the inner side wall of the connecting pipe (27) is also provided with a connecting groove (46) adapted to the movement of the limit block (42), the connecting groove (46) comprising a straight groove (461), an arc groove (462) and a transverse groove (463) distributed from the outside to the inside; and a limit hole (47) adapted to the structure of the limit block (42) is provided at the transverse groove (463).

6. A high-precision internal spline finishing equipment as claimed in claim 5, characterized in that: The outer diameter of the connecting head (41) is equal to the inner diameter of the connecting tube (27); in the initial state, the compression spring (43) naturally stretches, and the distance H between the outer end surface of the elastic rubber ring (44) and the outer end surface of the connecting tube (27) is three times the thickness L of the elastic rubber ring (44).

7. A high-precision internal spline finishing equipment as claimed in claim 6, characterized in that: The length of the straight groove (461) is 1.5L, and the length of the arc groove (462) in the axial direction is L; the depth of the limiting hole (47) is (0.2-0.5)L, so that the limiting block (42) of the tool assembly (24) first moves along the straight groove (461) and then moves along the arc groove (462) until it enters the limiting hole (47) in the transverse groove (463), thereby completing the locking and fastening operation of the tool and the tool seat (23).

8. A high-precision internal spline finishing equipment as claimed in claim 7, characterized in that: The driving assembly (25) comprises a moving rail (251), a first moving seat (252), a first motor (253), a rotating wheel (254), and a connecting arm (255); the moving rail (251) is arranged on the table top (11) in a manner extending left and right and being symmetrically arranged front and back; the first moving seat (252) is fixedly mounted on the fixed plate (21) and has a first moving groove (256) at its lower end, and the moving rail (251) is matched and mounted with the first moving groove (256); the first motor (253) is fixedly mounted on the table top (11) through a bracket and is located on the left side of the fixed plate (21); the rotating wheel (254) is sleeved and mounted on the output shaft of the first motor (253), and has a first rotating column (257) at its lower end surface; the lower end surface of the fixed plate (21) is also provided with a second rotating column (258), and one end of the rotating wheel (254) is rotatably connected to the first rotating column (257), and the other end is rotatably connected to the second rotating column (258).

9. A high-precision internal spline finishing equipment as claimed in claim 8, characterized in that: The workpiece clamping mechanism (3) comprises a support plate (31), a mounting seat (32), a three-jaw chuck (33) and a feed assembly (34); the support plate (31) is arranged on the workbench (1) in a left-right distribution and is located on the right side of the fixed plate (21); the mounting seat (32) is vertically distributed and installed on the support plate (31); the three-jaw chuck (33) is arranged on the mounting seat (32) and is used to complete the fastening operation of the spline workpiece; a transmission plate (35) is also provided on one side of the three-jaw chuck (33), and the transmission plate (35) The mounting seat (32) is relatively rotatable but not movable; the right end of the transmission plate (35) is connected to the rotating shaft (36); a rotary motor (37) is also provided on one side of the mounting seat (32); the output shaft of the rotary motor (37) is connected to the rotating shaft (36) to drive the workpiece spline to perform rotary motion; the three-jaw chuck (33) and the cutter head (242) are kept in the same center; the feed assembly (34) is used to drive the support plate (31) to move to the left by a preset distance to reach a designated grinding position of the tool, so as to complete the grinding operation of the tool on the spline workpiece.

10. A high-precision internal spline finishing equipment as claimed in claim 9, characterized in that: The feeding assembly (34) comprises a second movable seat (341), a second motor (342), an auxiliary plate (343), a rotating screw (344), and a connecting seat (345); the second movable seat (341) is arranged on the supporting plate (31), and a second movable groove (346) is opened on the lower end surface, and the second movable groove (346) is matched with the movable rail (251) for installation; the second motor (342) is fixedly arranged on the right end of the table (11), and the auxiliary plate (343) is divided into left and right The rotating lead screw (344) is provided at two ends of the supporting plate (31), and is respectively located on the left and right sides of the supporting plate (31); the rotating lead screw (344) passes through the right auxiliary plate (343) and extends to the left side of the auxiliary plate (343); a bearing is provided at the connection between the rotating lead screw (344) and the auxiliary plate (343); the right end of the rotating lead screw (344) is connected to the second motor (342); the connecting seat (345) is provided on the lower end surface of the supporting plate (31), and is threadedly rotatingly connected to the rotating lead screw (344).

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