A CNC core-type dual-spindle turning and milling compound machining center and machining method

Abstract

The present invention discloses a CNC core-type dual-spindle milling compound machining center and a machining method, comprising a base, a machining mechanism disposed above the base, and characterized in that a main spindle system and a sub-spindle system are disposed above the base, and the main spindle system and the sub-spindle system are separated on both sides of the machining mechanism; the main spindle system clamps the parts and rotates at high speed to cooperate with the machining components in the machining mechanism for the head end machining of the parts, the sub-spindle system flexibly follows the main spindle to rotate at the same speed and clamp the head end of the parts, and then cooperates with the main spindle to achieve joint clamping of the parts, when the machining components are cut off, the main spindle flexibly follows the sub-spindle to rotate at the same speed to stably cut off the parts at the clamping end of the sub-spindle, and the parts at the clamping end of the sub-spindle rotate to cooperate with the machining components for further comprehensive machining of the parts. The present invention improves the accuracy of part clamping and improves the consistency of subsequent part machining.

Description

Technical Field

[0001] The invention belongs to the technical field of core-moving machines, and in particular relates to a CNC core-moving double-spindle turning and milling compound machining center and a machining method. Background Art

[0002] At present, various micro-precision components are inevitably needed in the high-tech industrial field.

[0003] The production of precision parts goes through multiple processing steps, and each processing step requires that the cumulative error cannot be effectively controlled. If the cumulative error requirements are increased, the yield rate will be extremely low, which will easily lead to the mixing of defective products and ultimately cause extremely serious consequences.

[0004] When processing micro parts with a diameter of less than 1mm, the processing accuracy requirements for the parts are more stringent. If the single-head clamping method is used for processing, the parts need to be turned around, which not only takes a long time, but also the secondary clamping and fixation after the turnaround is likely to increase the cumulative error of the part processing; if the two-end clamping method is used for processing, it is impossible to achieve absolute uniform speed during the dual-spindle servo control process, and under the working condition of 5000 revolutions per minute, a speed difference of 1 revolution will cause damage to the parts. Summary of the invention

[0005] The present invention aims at solving the problems in the prior art and proposes the following technical solutions:

[0006] A CNC core-type dual-spindle milling and turning compound machining center and machining method, comprising a base, a machining mechanism is arranged above the base, and is characterized in that a main spindle system and a sub-spindle system are arranged above the base, and the main spindle system and the sub-spindle system are separated on both sides of the machining mechanism;

[0007] In the spindle system, the main machine clamps the part and rotates at high speed to cooperate with the processing components in the processing mechanism for processing the head end of the part. In the sub-spindle system, the sub-spindle machine flexibly follows the main machine to rotate at the same speed and clamp the head end of the part, and then cooperates with the main machine to achieve joint clamping of the part. When the processing component is cut off, the main machine flexibly follows the sub-main machine to rotate at the same speed to stably cut off the part held at the sub-main machine's clamping end. The sub-main machine holds the part at the clamping end and rotates to cooperate with the processing components for further comprehensive processing of the part.

[0008] The present invention adopts a dual-spindle design to achieve one-time clamping and processing of the double ends of the part. The specific implementation method is as follows: after the main machine clamps the part and completes the processing of one end, the sub-main machine moves to the position where the part has been processed, and keeps rotating at the same speed as the main machine. The system reduces the rigidity of the sub-main machine shaft, allowing the sub-main machine shaft to flexibly follow the main machine shaft. After that, the sub-main machine clamps, the system reduces the rigidity of the main machine shaft, increases the rigidity of the sub-main machine shaft, and uses the processing assembly to cut the part, thereby achieving stable cutting of the part; after that, the sub-main machine clamps the part, and the processing assembly further comprehensively processes the cut end of the part; compared with the old technology of separate processing, this solution improves the accuracy of part clamping and the consistency of subsequent part processing because it is synchronously clamped and cut on one machine.

[0009] As a preferred embodiment of the above technical solution, magnetic ring encoders are installed on the shaft ends of the main machine and the auxiliary machine.

[0010] The present invention adopts an electric spindle for power drive. The working principle of the electric spindle is to pass the shaft core through the motor rotor, and then directly rotate the motor rotor through electromagnetic force without a transmission device, thereby driving the shaft core to rotate, and then driving the material supported on the shaft core to rotate. The operating system controls the speed and stop position angle of the electric spindle by installing a magnetic ring encoder on the shaft core, adjusting the drive frequency of the driver through the position feedback of the magnetic ring encoder, and then making the electric spindle have the characteristics of fast response, good positioning, and stable speed.

[0011] The present invention not only uses an electric spindle to eliminate the error caused by the transmission device between the motor and the spindle, but also uses a hollow magnetic ring encoder, which is directly installed on the shaft core without passing through the transmission device, thereby eliminating mechanical errors; the present invention needs to install magnetic ring encoders on both the main machine and the auxiliary machine at the same time, and uses flexible following technology. When the auxiliary machine moves to the position where the part has been processed and keeps rotating at the same speed as the main machine shaft, the system reduces the rigidity of the auxiliary machine shaft, that is, through system control, the fault tolerance range of the magnetic ring encoder on the auxiliary machine shaft is increased, so that the auxiliary machine shaft can be driven by a small load within a larger angle range, thereby achieving that at this stage, the auxiliary machine shaft fine-tunes the rotation angle by clamping the material and flexibly follows the main machine. When the processing assembly starts to cut the part, the system reduces the rigidity of the main machine shaft and increases the rigidity of the auxiliary machine shaft, allowing the main machine shaft to follow the auxiliary machine shaft, thereby achieving stable cutting of the part.

[0012] As a preferred embodiment of the above technical solution, the spindle system further includes a first carrier, a spindle X-axis slide and a spindle clamping mechanism;

[0013] The first carrier is fixedly mounted on the top of the base and is slidably connected to the bottom of the main machine. The spindle X-axis slide is used to drive the main machine and the spindle clamping mechanism to move horizontally along the X-axis. The spindle clamping mechanism is used to clamp parts.

[0014] During operation, the part is first clamped by the spindle clamping mechanism, and then the spindle X-axis slide is used to drive the main machine and the spindle clamping mechanism to move horizontally along the X-axis to the required processing position, and then the head end of the part is processed by the processing assembly.

[0015] As a preferred embodiment of the above technical solution, the sub-spindle system further includes a second stage, a sub-spindle Y-axis slide, a third stage, a sub-spindle X-axis slide and a sub-spindle clamping mechanism;

[0016] The sub-main machine is slidably installed on the top of the third carrier, the third carrier is slidably installed on the top of the second carrier, the second carrier is fixedly installed on the top of the base, the sub-spindle Y-axis slide is used to drive the second carrier to move horizontally along the Y-axis, and the sub-spindle X-axis slide is used to drive the sub-main machine to move horizontally along the X-axis.

[0017] After the processing assembly cuts the part, the sub-spindle clamping mechanism clamps the part, and drives the part through the sub-spindle Y-axis slide and the sub-spindle X-axis slide to make fine adjustments in position. The part can be further processed comprehensively in cooperation with the processing mechanism.

[0018] As a preferred embodiment of the above technical solution, a synchronization head is fixedly installed on the processing mechanism, and the synchronization head is directionally sleeved on the periphery of the head end shaft of the main machine.

[0019] As a preferred embodiment of the above technical solution, the synchronous head includes a synchronous inner sleeve, a slewing bearing, a fixed outer sleeve chuck sleeve, a spline and a synchronous head chuck;

[0020] The fixed outer sleeve is fixedly installed on the column, the synchronous inner sleeve is rotatably sleeved on the inner wall of the fixed outer sleeve through a slewing bearing, and the synchronous inner sleeve is sleeved on the outer periphery of the main engine shaft. The main engine shaft is provided with a spline groove, and the spline groove and the spline match.

[0021] The synchronous head chuck is used to further limit the clamping of parts. It can achieve two-way clamping and fixing of low-diameter parts in cooperation with the spindle clamping mechanism, ensuring the stability of low-diameter parts during high-speed rotation processing;

[0022] In order to meet the processing requirements of micro-precision parts below 1mm and prevent the material from being stuck due to overly tight contact with the center spindle chuck, the present invention sets a synchronous head at the front end of the main shaft, directly processes a spline groove along the axial direction, and designs two splines on the synchronous inner sleeve to cooperate with the spline groove. The synchronous inner sleeve is then assembled with the fixed outer sleeve through a rotary bearing, so that the main shaft electric spindle can achieve a completely synchronous speed with the synchronous inner sleeve during working rotation, but can achieve relative displacement with the synchronous inner sleeve on the X-axis; compared with the old technology of connecting the synchronous center sleeve to a nut or a spline or other adapter component, and then connecting it to the spindle through the adapter component, the new design has stronger rigidity, no precision loss caused by the adapter, and no loosening problem, and can maintain synchronous connection regardless of how the spindle rotates.

[0023] As a preferred embodiment of the above technical solution, the spindle clamping mechanism includes a driving assembly and a clamping assembly;

[0024] The driving assembly includes a clamping plate, a cylinder, an adapter plate, a connecting sleeve and a clamping sleeve. The clamping plate is fixedly mounted on the top of the main machine, the cylinder is mounted on the top of the clamping plate, the top sleeve is movably plugged into the hollow shaft core of the main machine, the clamping sleeve is slidably sleeved on the periphery of the shaft core of the main machine, and the connecting sleeve is fixedly sleeved on the periphery of the clamping sleeve and is hinged to the end of the adapter plate away from the cylinder.

[0025] The clamping assembly comprises a top cylinder and a spindle chuck installed in the inner cavity of the main shaft core. The outer wall of the top cylinder is provided with a supporting groove, and the clamping claw on the clamping sleeve penetrates the outer wall of the main shaft core and supports the supporting groove.

[0026] The working principle of the spindle clamping mechanism is: when the clamping platen is pulled back, the connecting sleeve is driven to move in the X+ direction, thereby driving the claws on the clamping sleeve to close, and then pushing the ejector rod in the main shaft to move a short distance in the X- direction. The head end of the ejector is provided with a certain taper, and the taper is used to close the clamping part of the head end of the spindle chuck to clamp the parts; when the cylinder is pushed out, all the conduction logics run in the reverse direction, the spindle chuck is released, and the parts are no longer clamped; it should be noted that the sub-spindle clamping mechanism in the sub-spindle system and the spindle clamping mechanism in the spindle system have the same clamping principle, which will not be elaborated in this scheme.

[0027] As a preferred embodiment of the above technical solution, the processing mechanism includes a column, a Y-axis slide of a processing table, a fourth carrier, a Z-axis slide of the processing table and a processing component. The column is fixedly mounted on the top of the base, the processing component is fixedly mounted on the fourth carrier, the fourth carrier is movably mounted on the column, the Z-axis slide of the processing table is used to drive the processing component to move along the Z-axis, and the Y-axis slide of the processing table is used to drive the processing component, the fourth carrier and the Z-axis slide of the processing table to move along the Y-axis.

[0028] As a preferred embodiment of the above technical solution, the processing assembly includes a processing platform, a processing platform motor and a processing head. The processing platform is fixedly mounted on the fourth carrier and the power of the processing platform motor drives multiple processing heads to operate as needed.

[0029] The processing head in the processing assembly has multiple processing heads, which can be used for processing and cutting of parts. It cooperates with the position adjustment of the Y-axis slide and the Z-axis slide of the processing table to be used for precise cutting and processing of parts.

[0030] A processing method, which is applied to the above-mentioned CNC core-walking dual-spindle turning and milling compound processing center, and the processing method comprises:

[0031] S1. Fixing of parts: insert the parts from the tail end of the top cylinder, pass through the spindle chuck and the synchronous head chuck, and fix the parts under the joint action of the spindle chuck and the synchronous head chuck;

[0032] S2. Processing of parts: The main machine clamps the parts and rotates at high speed to cooperate with the processing components for processing the head end of the parts. The sub-machine flexibly follows the main machine and rotates at the same speed to clamp the head end of the parts, and then cooperates with the main machine to achieve joint clamping of the parts. When the processing components are cut off, the main machine flexibly follows the sub-machine and rotates at the same speed to stably cut off the parts at the clamping end of the sub-machine. The sub-machine clamping end part rotates to cooperate with the processing components for further comprehensive processing of the parts.

[0033] The beneficial effects of the present invention are:

[0034] 1. The present invention adopts a dual-spindle design to achieve one-time clamping and processing of the double ends of the part. The specific implementation method is as follows: after the main machine clamps the part and completes the processing of one end, the sub-main machine moves to the position where the part has been processed, and keeps rotating at the same speed as the main machine. The system reduces the rigidity of the sub-main machine shaft, allowing the sub-main machine shaft to flexibly follow the main machine shaft. After that, the sub-main machine clamps, the system reduces the rigidity of the main machine shaft, increases the rigidity of the sub-main machine shaft, and uses the processing assembly to cut the part, thereby achieving stable cutting of the part; after that, the sub-main machine clamps the part, and the processing assembly further comprehensively processes the cut end of the part; compared with the old technology of separate processing, this solution improves the accuracy of part clamping and the consistency of subsequent part processing because it is clamped and cut synchronously on one machine;

[0035] 2. The present invention sets a synchronous head at the front end of the main shaft, directly processes a spline groove along the axial direction, and designs two splines on the synchronous inner sleeve to cooperate with the spline groove. The synchronous inner sleeve is then assembled with the fixed outer sleeve through a rotary bearing, so that the main shaft electric spindle can achieve a completely synchronous speed with the synchronous inner sleeve during working rotation, but can achieve relative displacement with the synchronous inner sleeve on the X-axis; compared with the old technology of connecting the synchronous center sleeve to a nut or a spline or other adapter component, and then connecting it to the spindle through the adapter component, the new design has stronger rigidity, no precision loss caused by the adapter, and no loosening problem, and can maintain synchronous connection no matter how the main shaft rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 What is shown is a schematic diagram of the overall three-dimensional structure of the present invention;

[0037] Figure 2 Shown is a schematic diagram of the structure of the main spindle system, the sub-spindle system and the processing mechanism in the present invention;

[0038] Figure 3 Shown is a schematic diagram of the structure of the main spindle system and the sub-spindle system in the present invention;

[0039] Figure 4 Shown is a schematic diagram of the synchronization head structure in the present invention;

[0040] Figure 5 Shown is a schematic diagram of the structure of the spindle clamping mechanism in the present invention;

[0041] Figure 6 What is shown is a schematic diagram of the processing mechanism structure in the present invention;

[0042] Figure 7 Shown is a schematic diagram of the structure of the processing assembly in the present invention.

[0043] Attached photos

[0044] 10. Base; 20. Spindle system; 21. Main machine; 211. Spline groove; 22. First stage; 23. Main spindle X-axis slide; 24. Spindle clamping mechanism; 241. Clamping table; 242. Cylinder; 243. Adapter plate; 244. Connecting sleeve; 245. Clamping sleeve; 2451. Clamping claw; 246. Ejector; 247. Spindle chuck; 30. Sub-spindle system; 31. Sub-main machine; 32. Second stage; 33. Sub-spindle Y-axis slide; 34. Third stage; 35. Sub-spindle X-axis slide; 36. Sub-spindle clamping mechanism; 40. Processing mechanism; 41. Column; 42. Processing table Y-axis slide; 43. Fourth carrier; 44. Processing table Z-axis slide; 45. Processing assembly; 451. Processing table base; 452. Processing table motor; 453. Processing head; 50. Synchronous head; 51. Synchronous inner sleeve; 52. Rotary bearing; 53. Fixed outer sleeve; 54. Chuck sleeve; 55. Spline; 56. Synchronous head chuck; 00. Magnetic ring encoder. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0046] like Figure 1 , Figure 2 Shown

[0047] The invention comprises a base 10, and a processing mechanism 40 is arranged above the base 10. The invention is characterized in that a main axis system 20 and a sub-spindle system 30 are arranged above the base 10, and the main axis system 20 and the sub-spindle system 30 are separated on both sides of the processing mechanism 40;

[0048] The main machine 21 in the spindle system 20 clamps the part and rotates at high speed to cooperate with the processing component 45 in the processing mechanism 40 for processing the head end of the part. The sub-main machine 31 in the sub-spindle system 30 flexibly follows the main machine 21 to rotate at the same speed and clamp the head end of the part, and then cooperates with the main machine 21 to achieve joint clamping of the part. When the processing component 45 is cut off, the main machine 21 flexibly follows the sub-main machine 31 to rotate at the same speed to stably cut off the part clamped at the sub-main machine 31. The sub-main machine 31 clamps the part and rotates to cooperate with the processing component 45 for further comprehensive processing of the part.

[0049] The present invention adopts a dual-spindle design to achieve one-time clamping and processing of the double ends of the part. The specific implementation method is as follows: after the main machine 21 clamps the part and completes the processing of one end, the sub-main machine 31 moves to the position where the part has been processed, and keeps rotating at the same speed as the main machine 21. The system reduces the rigidity of the sub-main machine 31 axis, allowing the sub-main machine 31 axis to flexibly follow the main machine 21 axis. After that, the sub-main machine 31 clamps, the system reduces the rigidity of the main machine 21 axis, increases the rigidity of the sub-main machine 31 axis, and uses the processing component 45 to cut the part, thereby achieving stable cutting of the part; after that, the sub-main machine 31 clamps the part, and the processing component 45 further comprehensively processes the cut end of the part; compared with the old technology of separate processing, this solution improves the accuracy of part clamping and the consistency of subsequent part processing because it is synchronously clamped and cut on one machine.

[0050] like Figure 3 , Figure 5 Shown

[0051] Magnetic ring encoders 00 are installed on the shaft ends of the main host 21 and the auxiliary host 31.

[0052] The present invention adopts an electric spindle for power drive. The working principle of the electric spindle is to pass the shaft core through the motor rotor, and then realize the motor rotor rotation directly through electromagnetic force without a transmission device, and then drive the shaft core to rotate, and then drive the material supported on the shaft core to rotate. The operating system controls the speed and stop position angle of the electric spindle by installing a magnetic ring encoder 00 on the shaft core, adjusting the drive frequency of the driver through the position feedback of the magnetic ring encoder 00, and then making the electric spindle have the characteristics of fast response, good positioning, and stable speed.

[0053] In the present invention, not only an electric spindle is used to eliminate the error caused by the transmission device between the motor and the spindle, but also the magnetic ring encoder 00 does not pass through the transmission device, but uses a hollow magnetic ring encoder, which is directly installed on the shaft core, eliminating mechanical errors; in the present invention, it is necessary to install a magnetic ring encoder 00 on both the main machine 21 and the auxiliary main machine 31 at the same time, and use flexible following technology. When the auxiliary main machine 31 moves to the position where the part has been processed and keeps rotating at the same speed as the main machine 21 shaft, the system reduces the rigidity of the auxiliary main machine 31 shaft, that is, through system control, the fault tolerance range of the magnetic ring encoder 00 on the auxiliary main machine 31 shaft is increased, so that the auxiliary main machine 31 shaft can be driven by a small load within a larger angle range, and then realizes that at this stage, the auxiliary main machine 31 shaft fine-tunes the rotation angle by clamping the material and flexibly follows the main machine 21. When the processing component 45 starts to cut the part, the system reduces the rigidity of the main machine 21 shaft and increases the rigidity of the auxiliary main machine 31 shaft, allowing the main machine 21 shaft to follow the auxiliary main machine 31 shaft, thereby achieving stable cutting of the part.

[0054] The spindle system 20 also includes a first carrier 22, a spindle X-axis slide 23 and a spindle clamping mechanism 24; the first carrier 22 is fixedly mounted on the top of the base 10 and the top is slidably connected to the bottom of the main machine 21, the spindle X-axis slide 23 is used to drive the main machine 21 and the spindle clamping mechanism 24 to move horizontally along the X-axis, and the spindle clamping mechanism 24 is used to clamp parts.

[0055] During operation, the part is first clamped by the spindle clamping mechanism 24 , and then the spindle X-axis slide 23 drives the main machine 21 and the spindle clamping mechanism 24 to move horizontally along the X-axis to the desired processing position, and then the head end of the part is processed by the processing component 45 .

[0056] The spindle clamping mechanism 24 includes a driving assembly and a clamping assembly;

[0057] The driving assembly includes a clamping plate 241, a cylinder 242, an adapter plate 243, a connecting sleeve 244 and a clamping sleeve 245. The clamping plate 241 is fixedly mounted on the top of the main machine 21, the cylinder 242 is mounted on the top of the clamping plate 241, the top cylinder 246 is movably plugged into the hollow shaft core of the main machine 21, the clamping sleeve 245 is slidably sleeved on the outer periphery of the shaft core of the main machine 21, and the connecting sleeve 244 is fixedly sleeved on the outer periphery of the clamping sleeve 245 and is hinged to the end of the adapter plate 243 away from the cylinder 242;

[0058] The clamping assembly includes a top cylinder 246 and a spindle chuck 247 installed in the inner cavity of the main machine 21 shaft core. The outer wall of the top cylinder 246 is provided with a supporting groove, and the claw 2451 on the clamping sleeve 245 passes through the outer wall of the main machine 21 shaft core and supports the supporting groove.

[0059] The working principle of the spindle clamping mechanism 24 is as follows: when the clamping plate 241 is pulled back, the connecting sleeve 244 is driven to move in the X+ direction, thereby driving the claws 2451 on the clamping sleeve 245 to close, and then pushing the top cylinder 246 rod in the main machine 21 shaft to move a short distance in the X- direction. The head end of the top cylinder 246 is provided with a certain taper, and the taper is used to close the clamping part of the head end of the spindle chuck 247, thereby clamping the parts; when the cylinder 242 is ejected, all the conduction logics run in reverse, the spindle chuck 247 is released, and the parts are no longer clamped; it should be noted that the sub-spindle clamping mechanism 36 in the sub-spindle system 30 and the spindle clamping mechanism 24 in the spindle system 20 have the same clamping principle, and this scheme will not be elaborated in detail.

[0060] The sub-spindle system 30 also includes a second carrier 32, a sub-spindle Y-axis slide 33, a third carrier 34, a sub-spindle X-axis slide 35 and a sub-spindle clamping mechanism 36; the sub-spindle main machine 31 is slidably mounted on the top of the third carrier 34, the third carrier 34 is slidably mounted on the top of the second carrier 32, the second carrier 32 is fixedly mounted on the top of the base 10, the sub-spindle Y-axis slide 33 is used to drive the second carrier 32 to move horizontally along the Y-axis, and the sub-spindle X-axis slide 35 is used to drive the sub-spindle main machine 31 to move horizontally along the X-axis; when the processing assembly 45 cuts off the part, the sub-spindle clamping mechanism 36 clamps the part, and drives the part to perform fine adjustment in position through the sub-spindle Y-axis slide 33 and the sub-spindle X-axis slide 35, and cooperates with the processing mechanism 40 to further comprehensively process the part.

[0061] A synchronous head 50 is fixedly mounted on the processing mechanism 40 , and the synchronous head 50 is directionally sleeved on the outer periphery of the head end shaft of the main machine 21 .

[0062] like Figure 4 Shown

[0063] The synchronization head 50 includes a synchronization inner sleeve 51, a slewing bearing 52, a fixed outer sleeve 53, a chuck sleeve 54, a spline 55 and a synchronization head chuck 56;

[0064] The fixed outer sleeve 53 is fixedly installed on the column 41, and the synchronous inner sleeve 51 is rotatably sleeved on the inner wall of the fixed outer sleeve 53 through the slewing bearing 52, and the synchronous inner sleeve 51 is sleeved on the outer periphery of the shaft of the main machine 21. A spline groove 211 is opened on the shaft of the main machine 21, and the spline groove 211 matches the spline 55.

[0065] The synchronous head chuck 56 is used to further limit the clamping of the parts. It can achieve two-way clamping and fixing of low-diameter parts in cooperation with the spindle clamping mechanism 24, thus ensuring the stability of low-diameter parts during high-speed rotation processing;

[0066] In order to meet the processing requirements of micro-precision parts below 1 mm and prevent the material from being stuck due to overly tight contact with the center spindle chuck, the present invention sets a synchronous head 50 at the front end of the main machine 21 shaft, and directly processes a spline groove 211 along the axial direction. Two splines 55 are designed on the synchronous inner sleeve 51 to cooperate with the spline groove 211. The synchronous inner sleeve 51 is then assembled with the fixed outer sleeve 53 through a rotary bearing 52. In this way, the main machine 21 shaft electric spindle can achieve a completely synchronous speed with the synchronous inner sleeve 51 during working rotation, but can achieve relative displacement with the synchronous inner sleeve 51 on the X-axis; compared with the old technology of connecting the synchronous center sleeve to a nut or a spline or other adapter component, and then connecting it to the spindle through the adapter component, the new design has stronger rigidity, no precision loss caused by the adapter, and no loosening problem. No matter how the spindle rotates, the synchronous connection can be maintained.

[0067] like Figure 6 , Figure 7 Shown

[0068] The processing mechanism 40 includes a column 41, a processing table Y-axis slide 42, a fourth stage 43, a processing table Z-axis slide 44 and a processing assembly 45. The column 41 is fixedly mounted on the top of the base 10, the processing assembly 45 is fixedly mounted on the fourth stage 43, the fourth stage 43 is movably mounted on the column 41, the processing table Z-axis slide 44 is used to drive the processing assembly 45 to move along the Z axis, and the processing table Y-axis slide 42 is used to drive the processing assembly 45, the fourth stage 43 and the processing table Z-axis slide 44 along the Z axis. Y-axis movement; the processing assembly 45 includes a processing platform 451, a processing platform motor 452 and a processing head 453. The processing platform 451 is fixedly mounted on the fourth carrier 43 and the power of the processing platform motor 452 drives multiple processing heads 453 to operate on demand; the processing head 453 in the processing assembly 45 has multiple processing heads, which can be used for processing and cutting of parts, and cooperate with the position adjustment of the processing platform Y-axis slide 42 and the processing platform Z-axis slide 44, so as to be used for precise cutting and processing of parts.

[0069] A processing method, the processing method is applied to the above-mentioned CNC core-walking dual-spindle turning and milling compound processing center, the processing method comprises:

[0070] S1. Fixing of parts: insert the parts from the tail end of the top cylinder 246, pass through the spindle chuck 247 and the synchronous head chuck 56, and fix the parts under the joint action of the spindle chuck 247 and the synchronous head chuck 56;

[0071] S2. Processing of parts: the main machine 21 clamps the parts and rotates at high speed to cooperate with the processing component 45 for processing the head end of the parts. The sub-main machine 31 flexibly follows the main machine 21 to rotate at the same speed and clamp the head end of the parts, and then cooperates with the main machine 21 to achieve joint clamping of the parts. When the processing component 45 is cut, the main machine 21 flexibly follows the sub-main machine 31 to rotate at the same speed to stably cut off the parts clamped at the sub-main machine 31. The sub-main machine 31 clamps the parts at the end and rotates to cooperate with the processing component 45 for further comprehensive processing of the parts.

[0072] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A CNC core-type dual-spindle turning and milling compound machining center, comprising a base (10), a machining mechanism (40) being arranged above the base (10), characterized in that: A main spindle system (20) and a sub-spindle system (30) are arranged above the base (10), and the main spindle system (20) and the sub-spindle system (30) are located on both sides of the processing mechanism (40); The main spindle (21) in the main spindle system (20) clamps the part and rotates at high speed to cooperate with the processing assembly (45) in the processing mechanism (40) for processing the head end of the part. The sub-spindle (31) in the sub-spindle system (30) flexibly follows the main spindle (21) to rotate at the same speed and clamp the head end of the part, thereby cooperating with the main spindle (21) to achieve joint clamping of the part. When the processing assembly (45) is cut, the main spindle (21) flexibly follows the sub-spindle (31) to rotate at the same speed to stably cut off the part clamped at the sub-spindle (31) end. The sub-spindle (31) clamps the part and rotates to cooperate with the processing assembly (45) for further comprehensive processing of the part. A magnetic ring encoder (00) is installed on both the main machine (21) and the auxiliary main machine (31) at the same time, and a flexible following technology is used. When the auxiliary main machine (31) moves to the position where the part has been processed and keeps rotating at the same speed as the main machine (21) shaft, the system reduces the rigidity of the auxiliary main machine (31) shaft, that is, through system control, the fault tolerance range of the magnetic ring encoder (00) on the auxiliary main machine (31) shaft is increased, so that the auxiliary main machine (31) shaft can be driven by a small load within a larger angle range, thereby achieving that at this stage, the auxiliary main machine (31) shaft flexibly follows the main machine (21) by clamping the material and fine-tuning the rotation angle; when the processing component (45) starts to cut the part, the system reduces the rigidity of the main machine (21) shaft and increases the rigidity of the auxiliary main machine (31) shaft, allowing the main machine (21) shaft to follow the auxiliary main machine (31) shaft.

2. A CNC core-type dual-spindle turning and milling compound machining center according to claim 1, characterized in that: The spindle system (20) further comprises a first carrier (22), a spindle X-axis slide (23), and a spindle clamping mechanism (24); The first carrier (22) is fixedly mounted on the top of the base (10) and is slidably connected to the bottom of the main machine (21). The spindle X-axis slide (23) is used to drive the main machine (21) and the spindle clamping mechanism (24) to move horizontally along the X-axis. The spindle clamping mechanism (24) is used to clamp parts.

3. The CNC core-type dual-spindle turning and milling compound machining center according to claim 1 is characterized in that: The sub-spindle system (30) further comprises a second carrier (32), a sub-spindle Y-axis slide (33), a third carrier (34), a sub-spindle X-axis slide (35) and a sub-spindle clamping mechanism (36); The sub-main machine (31) is slidably mounted on the top of the third carrier (34), the third carrier (34) is slidably mounted on the top of the second carrier (32), the second carrier (32) is fixedly mounted on the top of the base (10), the sub-spindle Y-axis slide (33) is used to drive the second carrier (32) to move horizontally along the Y-axis, and the sub-spindle X-axis slide (35) is used to drive the sub-main machine (31) to move horizontally along the X-axis.

4. The CNC core-type dual-spindle turning and milling compound machining center according to claim 1 is characterized in that: A synchronization head (50) is fixedly mounted on the processing mechanism (40), and the synchronization head (50) is directionally sleeved on the periphery of the head end shaft of the main machine (21).

5. The CNC core-moving dual-spindle turning and milling compound machining center according to claim 4 is characterized in that: The synchronous head (50) comprises a synchronous inner sleeve (51), a slewing bearing (52), a fixed outer sleeve (53), a chuck sleeve (54), a spline (55) and a synchronous head chuck (56); The fixed outer sleeve (53) is fixedly mounted on the column (41), the synchronous inner sleeve (51) is rotatably sleeved on the inner wall of the fixed outer sleeve (53) via a slewing bearing (52), and the synchronous inner sleeve (51) is sleeved on the outer periphery of the shaft of the main machine (21), and a spline groove (211) is provided on the shaft of the main machine (21), and the spline groove (211) and the spline (55) match each other.

6. The CNC core-type dual-spindle turning and milling compound machining center according to claim 2 is characterized in that: The spindle clamping mechanism (24) comprises a driving component and a clamping component; The driving assembly comprises a clamping plate (241), a cylinder (242), an adapter plate (243), a connecting sleeve (244) and a clamping sleeve (245); the clamping plate (241) is fixedly mounted on the top of the main machine (21); the cylinder (242) is mounted on the top of the clamping plate (241); the top sleeve (246) is movably plugged into the hollow shaft core of the main machine (21); the clamping sleeve (245) is slidably sleeved on the periphery of the shaft core of the main machine (21); the connecting sleeve (244) is fixedly sleeved on the periphery of the clamping sleeve (245) and is hinged to an end of the adapter plate (243) away from the cylinder (242); The clamping assembly comprises a top cylinder (246) and a spindle chuck (247) installed in the inner cavity of the main machine (21) shaft core, the outer wall of the top cylinder (246) is provided with a supporting groove, and the clamping claw (2451) on the clamping sleeve (245) passes through the outer wall of the main machine (21) shaft core and abuts against the supporting groove.

7. The CNC core-moving dual-spindle turning and milling compound machining center according to claim 1 is characterized in that: The processing mechanism (40) comprises a column (41), a processing table Y-axis slide (42), a fourth carrier (43), a processing table Z-axis slide (44) and a processing assembly (45), wherein the column (41) is fixedly mounted on the top of the base (10), the processing assembly (45) is fixedly mounted on the fourth carrier (43), the fourth carrier (43) is movably mounted on the column (41), the processing table Z-axis slide (44) is used to drive the processing assembly (45) to move along the Z-axis, and the processing table Y-axis slide (42) is used to drive the processing assembly (45), the fourth carrier (43) and the processing table Z-axis slide (44) to move along the Y-axis.

8. The CNC core-moving dual-spindle turning and milling compound machining center according to claim 7 is characterized in that: The processing assembly (45) comprises a processing platform (451), a processing platform motor (452) and a processing head (453); the processing platform (451) is fixedly mounted on the fourth carrier (43) and drives a plurality of processing heads (453) to operate as required through the power of the processing platform motor (452).

9. A processing method, characterized in that: The processing method is applied to a CNC core-walking dual-spindle turning and milling compound processing center as described in any one of claims 1 to 8, and the processing method comprises: S1. Fixing of parts: inserting the parts from the rear end of the top cylinder (246), passing through the spindle chuck (247) and the synchronous head chuck (56), and fixing the parts under the joint action of the spindle chuck (247) and the synchronous head chuck (56); S2. Processing of parts: the main machine (21) clamps the part and rotates at high speed to cooperate with the processing assembly (45) for processing the head end of the part. The sub-main machine (31) flexibly follows the main machine (21) and rotates at the same speed to clamp the head end of the part, thereby cooperating with the main machine (21) to achieve joint clamping of the part. When the processing assembly (45) is cut, the main machine (21) flexibly follows the sub-main machine (31) and rotates at the same speed to stably cut off the part clamped at the sub-main machine (31). The sub-main machine (31) rotates at the clamping end of the part to cooperate with the processing assembly (45) for further comprehensive processing of the part.

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