Intelligent flexible self-adaptive tooling fixture for large and medium-sized milling-turning compound machining center

Abstract

The utility model discloses a big and medium -sized milling car compound processing center intelligent flexible self -adaptation frock clamp relates to lathe fixture technical field, including spindle end quick change module, and spindle end quick change module includes: spindle end transition disc, zero point quick change device and workpiece fixture, spindle end transition disc installs in the end of workpiece spindle, zero point quick change device divides into transition disc side portion and fixture side portion, and transition disc side portion connects spindle end transition disc, and fixture side portion connects workpiece fixture, and after the butt joint of transition disc side portion and fixture side portion can make workpiece spindle drive workpiece fixture coaxial rotation, workpiece fixture is used for clamping the workpiece of waiting for processing, the utility model discloses a spindle end transition disc connects workpiece spindle, and also through zero point quick change device to realize spindle end transition disc and workpiece fixture connection, adopt the form of zero point positioning to realize quick, conveniently change workpiece fixture, and can guarantee installation accuracy.

Description

Technical Field

[0001] This utility model relates to the field of machine tool fixture technology, and in particular to intelligent flexible adaptive tooling fixtures for large and medium-sized milling and turning composite machining centers. Background Technology

[0002] Large and medium-sized milling-turning machining centers, as efficient and high-precision machining equipment, have been widely used in machinery manufacturing, aerospace, energy, and other fields. With the increasing demand for multi-variety, small-batch production in these fields, the flexibility of large and medium-sized milling-turning machining centers has become a development trend. Flexible tooling and fixtures are a crucial factor in enhancing the flexibility of large and medium-sized milling-turning machining centers.

[0003] Currently, the parts processed by large and medium-sized milling and turning machining centers are typically characterized by large diameters and long shafts, resulting in relatively bulky tooling and fixtures. When machining parts of different shapes, manual installation and alignment are inaccurate, and fixture changes are inconvenient and time-consuming, thus affecting the processing efficiency of large and medium-sized milling and turning machining centers. Utility Model Content

[0004] This utility model provides an intelligent, flexible, and adaptive tooling fixture for large and medium-sized milling and turning machining centers to solve problems in the process of changing fixtures in such centers.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] Intelligent flexible adaptive tooling fixture for large and medium-sized milling and turning machining centers, including a spindle end quick change module, which includes: a spindle end transition plate, a zero point quick change device and a workpiece fixture;

[0007] The spindle end transition plate is installed at the end of the workpiece spindle;

[0008] The zero-point quick change device is divided into a transition plate side part and a fixture side part. The transition plate side part is connected to the transition plate at the spindle end, and the fixture side part is connected to the workpiece fixture. After the transition plate side part and the fixture side part are connected, the workpiece spindle can drive the workpiece fixture to rotate coaxially.

[0009] Workpiece fixtures are used to hold workpieces to be processed.

[0010] Preferably, the spindle end transition plate is detachably and fixedly connected to the workpiece spindle. A first positioning component is provided between the end of the spindle end transition plate and the end of the workpiece spindle for positioning along the axis of the workpiece spindle. The first positioning component includes a first disc-side positioning part disposed on the spindle end transition plate and a first axial-side positioning part disposed at the end of the workpiece spindle. The first disc-side positioning part and the first axial-side positioning part are positioned by a tapered surface engagement.

[0011] Preferably, a second positioning component for preliminary angular positioning is provided between the spindle end transition plate and the end of the workpiece spindle; the second positioning component includes a second disc-side positioning part disposed on the spindle end transition plate and a second axial-side positioning part disposed on the end of the workpiece spindle, the second disc-side positioning part is a positioning hole / positioning post, the second axial-side positioning part is a positioning post / positioning hole, and the positioning post is inserted into the positioning hole with clearance fit.

[0012] Preferably, the transition plate side portion is a first zero-point positioning system / first pallet, and the clamp side portion is a first pallet / first zero-point positioning system, with the first zero-point positioning system docking with the first pallet.

[0013] Preferably, at least two sets of first guide components are provided between the transition disk side portion and the clamp side portion. The first guide component includes a first disk side guide portion disposed on the transition disk side portion and a first clamp side guide portion disposed on the clamp side portion. The first disk side guide portion is a guide hole / guide pin, and the first clamp side guide portion is a guide pin / guide hole. The guide pin is first inserted into the guide hole to guide the transition disk side portion and the clamp side portion, and then the transition disk side portion is connected to the clamp side portion.

[0014] Preferably, a second guide assembly is provided between the transition plate side portion and the fixture side portion to guide along the workpiece spindle axis. The second guide assembly includes a second plate side guide portion disposed on the transition plate at the spindle end and a second fixture side guide portion disposed on the fixture side portion. The second plate side guide portion is coaxially disposed with the workpiece spindle axis, and the second plate side guide portion and the second fixture side guide portion guide each other through a tapered surface engagement.

[0015] Preferably, the second disc side guide portion includes a frustum portion, and the second clamp side guide portion has a conical hole. The outer periphery of the frustum portion fits with the conical surface of the inner wall of the conical hole. The outer periphery of the frustum portion has at least two annular grooves, so that the frustum portion forms two annular pieces.

[0016] Preferably, a third guide assembly is provided between the fixture side portion and the workpiece fixture to guide along the main axis of the workpiece. The third guide assembly includes a third disc side guide portion disposed on the fixture side portion and a third fixture side guide portion disposed on the workpiece fixture. The third disc side guide portion is a boss / groove, and the third fixture side guide portion is a groove / boss. The boss and the groove are in clearance fit.

[0017] An adjustment assembly for adjusting the workpiece fixture to be coaxial with the workpiece spindle is provided between the fixture side part and the workpiece fixture. The adjustment assembly includes multiple threaded through holes and a corresponding number of set screws. The threaded through holes are opened on the side wall of the groove and arranged around the axis of the workpiece fixture. The sum of the angles between the center lines of any two of the three threaded through holes and the center line of the remaining threaded through hole along two opposite directions is greater than or equal to 180°. The set screw passes through the corresponding threaded through hole and abuts against the side wall of the boss.

[0018] Preferably, the sidewall of the boss is provided with a keyway corresponding to the number of set screws, and the set screws rest on the bottom of the keyway.

[0019] Preferably, it also includes a center frame quick-change device, which includes a center frame, a second zero-point positioning system and a second tray, wherein the center frame is fixedly connected to the second tray and the second zero-point positioning system is docked to the second tray.

[0020] Beneficial effects:

[0021] This application discloses an intelligent flexible adaptive tooling fixture for a large and medium-sized milling and turning composite machining center. It connects the workpiece spindle by setting a transition plate at the spindle end and connects the transition plate and the workpiece fixture by a zero-point quick-change device. The zero-point positioning method enables quick and convenient replacement of the workpiece fixture and ensures installation accuracy. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the intelligent flexible adaptive tooling fixture for large and medium-sized milling and turning composite machining centers disclosed in this utility model.

[0024] Figure 2 This is the front view of the intelligent flexible adaptive tooling fixture for large and medium-sized milling and turning composite machining centers disclosed in this utility model.

[0025] Figure 3 for Figure 2 Sectional view of AA;

[0026] Figure 4 for Figure 3 A magnified view of a section of section I;

[0027] Figure 5 for Figure 3 Enlarged view of a section of section II;

[0028] Figure 6 for Figure 3 A magnified view of a section of section III;

[0029] Figure 7 This utility model discloses a structural schematic diagram of the combination of the workpiece spindle and the spindle end transition plate of the intelligent flexible adaptive tooling fixture for large and medium-sized milling and turning composite machining centers.

[0030] Figure 8 This is a schematic diagram of the structure of the combination of the transition plate side part and the spindle end transition plate of the intelligent flexible adaptive tooling fixture for large and medium-sized milling and turning composite machining centers disclosed in this utility model.

[0031] Figure 9 This is a top view of the combination of the transition plate side portion and the spindle end transition plate of the intelligent flexible adaptive tooling fixture for large and medium-sized milling and turning composite machining centers disclosed in this utility model.

[0032] Figure 10 This is a structural schematic diagram of the zero-point quick-change device for the intelligent flexible adaptive tooling fixture of the large and medium-sized milling and turning composite machining center disclosed in this utility model.

[0033] Figure 11 This is a schematic diagram of the combination of the fixture side part and the workpiece fixture of the intelligent flexible adaptive tooling fixture for large and medium-sized milling and turning composite machining centers disclosed in this utility model.

[0034] Figure 12 This is a front view of the combination of the fixture side portion and the workpiece fixture of the intelligent flexible adaptive tooling fixture for large and medium-sized milling and turning composite machining centers disclosed in this utility model.

[0035] Figure 13 for Figure 12 Sectional view of BB;

[0036] Figure 14 This is a schematic diagram of the second zero-point positioning system of the intelligent flexible adaptive tooling fixture for large and medium-sized milling and turning composite machining centers disclosed in this utility model.

[0037] Figure 15 This is a schematic diagram of the structure of the combination of the center frame and the second support plate of the intelligent flexible adaptive tooling fixture for large and medium-sized milling and turning composite machining centers disclosed in this utility model.

[0038] 1. Spindle end transition plate; 111. First plate side positioning part; 112. First shaft side positioning part; 121. Second plate side positioning part; 122. Second shaft side positioning part; 2. Zero point quick change device; 21. Transition plate side part; 22. Fixture side part; 231. First plate side guide part; 232. First fixture side guide part; 241. Second plate side guide part; 242. Second fixture side guide part; 243. Frustum part; 2431. Annular plate; 244. Conical hole; 245. Flange part; 246. Guide section; 2531. Threaded through hole; 2532. Set screw; 2533. Keyway; 3. Workpiece fixture; 41. Center rest; 42. Second zero point positioning system; 43. Second support plate; 5. Workpiece spindle. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0040] Intelligent flexible adaptive tooling fixtures for large and medium-sized milling and turning machining centers, combined with Figure 1 , Figure 2 and Figure 3 As shown, the device includes a spindle-end quick-change module, comprising: a spindle-end transition plate 1, a zero-point quick-change device 2, and a workpiece clamp 3. The spindle-end transition plate 1 is installed at the end of the workpiece spindle 5. The zero-point quick-change device 2 is divided into a transition plate side portion 21 and a clamp side portion 22. The transition plate side portion 21 connects to the spindle-end transition plate 1, and the clamp side portion 22 connects to the workpiece clamp 3. After the transition plate side portion 21 and the clamp side portion 22 are connected, the workpiece spindle 5 can drive the workpiece clamp 3 to rotate coaxially. The workpiece clamp 3 is used to hold the workpiece to be processed. This application connects the spindle-end transition plate 1 to the end of the workpiece spindle 5 and connects the spindle-end transition plate 1 and the workpiece clamp 3 through the zero-point quick-change device 2. For different workpieces to be processed, the zero-point positioning method is used to achieve quick and convenient replacement of the workpiece clamp 3 while ensuring installation accuracy.

[0041] Specifically, this application uses blade tip grinding as an example for illustration. The intelligent flexible adaptive tooling fixture of the large and medium-sized milling and turning composite machining center is installed on the workpiece spindle 5 of the machine tool. The workpiece fixture 3 is the fixture disclosed in Chinese Patent No. CN114161273B entitled "A Fixture for Clamping Workpieces for Grinding Blade Tips of Gas Turbine Rotors".

[0042] Preferably, combined with Figure 1 , Figure 3 , Figure 4 and Figure 7 As shown, the spindle end transition plate 1 is detachably and fixedly connected to the workpiece spindle 5. A first positioning assembly is provided between the spindle end transition plate 1 and the end of the workpiece spindle 5 for positioning along the axis of the workpiece spindle 5. The first positioning assembly includes a first disc-side positioning part 111 disposed on the spindle end transition plate 1 and a first axial-side positioning part 112 disposed at the end of the workpiece spindle 5. The first disc-side positioning part 111 and the first axial-side positioning part 112 are positioned by a tapered surface engagement. The tapered surface engagement achieves guidance and positioning to ensure the installation accuracy of the spindle end transition plate 1.

[0043] Specifically, the first axial positioning part 112 is formed by machining a tapered surface on the outer periphery of the end of the workpiece spindle 5. In this embodiment, its shape is the side of a frustum, and the tapered surface is coaxially arranged with the workpiece spindle 5. The first disk-side positioning part 111 is formed by opening a tapered hole in the center of the spindle end transition disk 1. Its shape is also the side of a frustum. The initial positioning of the spindle end transition disk 1 and the workpiece spindle 5 is achieved by the cooperation of the tapered surface and the tapered hole.

[0044] Specifically, the end face of the workpiece spindle 5 is machined with a first set of threaded holes, and the spindle end transition plate 1 is machined with a corresponding first set of through holes. The spindle end transition plate 1 is detachably and fixedly connected to the workpiece spindle 5 by the first set of fixing screws.

[0045] Preferably, a second positioning assembly for preliminary angular positioning is provided between the spindle end transition plate 1 and the end of the workpiece spindle 5. The second positioning assembly includes a second disc-side positioning part 121 disposed on the spindle end transition plate 1 and a second axial-side positioning part 122 disposed at the end of the workpiece spindle 5. The second disc-side positioning part 121 is a positioning hole / positioning pin, and the second axial-side positioning part 122 is a positioning pin / positioning hole. The positioning pin is inserted into the positioning hole with clearance fit. Through the cooperation of the second disc-side positioning part 121 and the second axial-side positioning part 122, the angular position of the spindle end transition plate 1 is preliminarily positioned during the installation process, preventing the first set of threaded holes and the first set of through holes from being misaligned, thus facilitating rapid installation.

[0046] Specifically, the second axial positioning part 122 is a positioning post, and the second disc-side positioning part 121 is a positioning hole; to facilitate replacement after wear, the positioning post adopts a bushing structure. The positioning post includes a first bushing and a first connecting screw. The first bushing has a countersunk hole, and the first connecting screw passes through the countersunk hole of the first bushing and is tightened on the end face of the workpiece spindle 5.

[0047] Specifically, a mounting hole is provided on the end face of the workpiece spindle 5. One end of the first bushing is inserted into the mounting hole and is interference-fitted with the mounting hole, while the other end is inserted into the positioning hole to ensure the positional accuracy of the first bushing.

[0048] Preferably, the transition plate side portion 21 is a first zero-point positioning system / first pallet, and the fixture side portion 22 is a first pallet / first zero-point positioning system, with the first zero-point positioning system docking with the first pallet. By docking the first pallet connecting different workpiece fixtures 3 to the first zero-point positioning system, quick replacement of workpiece fixtures 3 can be achieved.

[0049] Preferably, combined with Figure 1 , Figure 3 , Figure 5 , Figure 8 and Figure 11As shown, at least two sets of first guide components are provided between the transition plate side portion 21 and the clamp side portion 22. In this embodiment, there are two sets of first guide components, which are arranged at 180°. The first guide component includes a first plate side guide portion 231 disposed on the transition plate side portion 21 and a first clamp side guide portion 232 disposed on the clamp side portion 22. The first plate side guide portion 231 is a guide hole / guide pin, and the first clamp side guide portion 232 is a guide pin / guide hole. The guide pin is first inserted into the guide hole to guide the transition plate side portion 21 and the clamp side portion 22, and then the transition plate side portion 21 is connected to the clamp side portion 22 to avoid excessive deviation between the first zero-point positioning system and the first pallet.

[0050] Specifically, the transition plate side portion 21 is the first zero-point positioning system, and the fixture side portion 22 is the first support plate. A power-providing flow channel is arranged on the assembly of the fixture side portion 22 and the workpiece fixture 3 to avoid frequent replacements, facilitating the layout and connection of the flow channel and pipeline. In this embodiment, the first zero-point positioning system adopts a four-unit zero-point positioning system.

[0051] Specifically, the spindle end transition plate 1 has a second set of threaded holes machined on the side facing the base plate of the first zero-point positioning system, and the base plate of the first zero-point positioning system has a corresponding second set of through holes machined on it. The base plate of the first zero-point positioning system is detachably and fixedly connected to the spindle end transition plate 1 by the second set of fixing screws.

[0052] Specifically, the first disc-side guide portion 231 is a guide hole, and a guide hole is formed on the base plate of the first zero-point positioning system; a second bushing is installed in the guide hole for easy replacement after wear. The first clamp-side guide portion 232 is a guide pin; a countersunk hole is formed on the first support plate, and a first connecting screw passes through the side of the first support plate facing the base plate of the first zero-point positioning system and is screwed into the guide pin for fixation. The guide pin is inserted into the second bushing for coarse guidance.

[0053] Preferably, combined with Figure 1 , Figure 3 , Figure 6 , Figure 8 , Figure 9 and Figure 11 As shown, a second guide assembly is provided between the transition plate side portion 21 and the fixture side portion 22 to guide along the axis of the workpiece spindle 5. The second guide assembly includes a second plate side guide portion 241 disposed on the spindle end transition plate 1 and a second fixture side guide portion 242 disposed on the fixture side portion 22. The second plate side guide portion 241 is coaxially disposed with the axis of the workpiece spindle 5. The second plate side guide portion 241 and the second fixture side guide portion 242 are guided by a conical surface fit, so that the fixture side portion 22 can self-center during the process of aligning with the transition plate side portion 21.

[0054] Preferably, combined with Figure 6 , Figure 8 , Figure 9 , Figure 11 , Figure 12 and Figure 13 As shown, the second disc-side guide portion 241 includes a frustum 243, and the second clamp-side guide portion 242 has a conical hole 244. The outer periphery of the frustum 243 mates with the conical surface of the inner wall of the conical hole 244. The outer periphery of the frustum 243 has at least two annular grooves, forming two annular pieces 2431. By combining zero-point positioning with conical surface mating, preliminary positioning is first achieved through conical surface mating, followed by precise positioning and locking through zero-point positioning. During the process of clamp-side portion 22 aligning with transition disc-side portion 21, the slight deformation of the two annular pieces 2431 of the frustum 243 improves the assembly accuracy of clamp-side portion 22.

[0055] Specifically, the base plate of the first zero-point positioning system has a stepped hole at its center, and the second disc-side guide part 241 is a central cone sleeve. The central cone sleeve includes, in sequence from the workpiece clamp 3 to the workpiece spindle 5: a frustum part 243, a flange part 245, and a guide section 246. The guide section 246 is inserted into the stepped hole for guidance, and the flange part 245 abuts against the edge of the stepped hole. The flange part 245 is fixedly connected to the base plate of the first zero-point positioning system by a fourth set of fixing screws.

[0056] Specifically, the root dimensions of the two annular plates 2431 of the frustum portion 243 are smaller than the top dimensions to facilitate minute deformation.

[0057] Preferably, combined with Figure 1 , Figure 3 , Figure 10 , Figure 11 , Figure 12 and Figure 13 As shown, a third guide assembly is provided between the fixture side portion 22 and the workpiece fixture 3 to guide along the axis of the workpiece spindle 5. The third guide assembly includes a third disk side guide portion provided on the fixture side portion 22 and a third fixture side guide portion provided on the workpiece fixture 3. The third disk side guide portion is a boss / groove, and the third fixture side guide portion is a groove / boss. The boss and the groove are in clearance fit.

[0058] An adjustment assembly for adjusting the workpiece fixture 3 to be coaxial with the workpiece spindle 5 is provided between the fixture side part 22 and the workpiece fixture 3. The adjustment assembly includes multiple threaded through holes 2531 and a corresponding number of set screws 2532. The threaded through holes 2531 are opened on the side wall of the groove and arranged around the axis of the workpiece fixture 3. The sum of the angles between the center lines of any two of the three threaded through holes 2531 and the center line of the remaining threaded through hole 2531 in opposite directions is greater than or equal to 180°. The set screw 2532 passes through the corresponding threaded through hole 2531 and abuts against the side wall of the boss to adjust the position of the workpiece fixture 3 by up, down, left and right.

[0059] The docking process between the workpiece fixture 3 and the fixture side part 22 is guided by the third guide component, and then the workpiece fixture 3 and the workpiece spindle 5 are adjusted to be coaxial by turning the set screw 2532 of the adjustment component.

[0060] Specifically, the third disc side guide is a cylindrical boss, that is, a cylindrical boss is machined on the side of the first support plate away from the first zero-point positioning system; the third clamp side guide is a cylindrical groove, that is, a round hole is machined on the end of the workpiece clamp 3 facing the first support plate; the threaded through hole 2531 penetrates the outer periphery of the workpiece clamp 3 and the inner wall of the round hole, and the head of the set screw 2532 abuts against the side wall of the cylindrical boss. In this embodiment, there are four threaded through holes 2531, and the four threaded through holes 2531 are evenly distributed around the circumference.

[0061] Specifically, in some embodiments, up to three threaded through holes 2531 may be provided. The three threaded through holes 2531 may be evenly distributed around the circumference, or the included angle between the threaded through hole 2531 and the other two threaded through holes 2531 may be 150°.

[0062] Specifically, a third set of threaded holes is machined on the side of the base plate away from the first zero-point positioning system of the first pallet, and a corresponding third set of through holes is machined on the workpiece fixture 3. The workpiece fixture 3 is detachably fixed to the first pallet by the third set of fixing screws.

[0063] Preferably, the sidewall of the boss is provided with keyways 2533 corresponding to the number of set screws 2532, and the set screws 2532 abut against the bottom of the keyway 2533 to achieve surface contact.

[0064] Specifically, the keyway 2533 is in the form of a keyway that cooperates with the sliding key, so that when the workpiece fixture 3 is connected to the first support plate, the head of the set screw 2532 protruding from the inner wall of the circular hole of the workpiece fixture 3 can slide directly into the keyway 2533, reducing the angular deviation between the workpiece fixture 3 and the first support plate, which is conducive to the alignment of the third set of through holes with the third set of threaded holes.

[0065] Preferably, combined with Figure 14 and Figure 15As shown, it also includes a center rest quick-change device, which comprises a center rest 41, a second zero-point positioning system 42, and a second support plate 43. The center rest 41 is fixedly connected to the second support plate 43, and the second zero-point positioning system 42 is docked to the second support plate 43. For different workpieces to be processed, the zero-point positioning method enables quick and convenient replacement of center rests 41 of different sizes, while ensuring installation accuracy. The spindle-end quick-change module clamps the end of the workpiece for rotation, while the center rest quick-change device supports the middle of the workpiece. Both the spindle-end quick-change module and the center rest quick-change device can achieve rapid replacement, meeting the fixture replacement needs of large and medium-sized milling and turning machining centers for multi-variety, small-batch production.

[0066] Specifically, the center frame 41 is fixedly connected to the side of the second support plate 43 away from the second zero-point positioning system 42 by the fifth set of fixing screws. The second zero-point positioning system 42 adopts a four-unit zero-point positioning system. Two guide posts are installed on the vertical mounting base of the second zero-point positioning system 42 by the sixth set of fixing screws. Two blind holes are machined on the second support plate 43, and a third bushing is embedded in the blind holes. The guide posts are inserted into the third bushing for guidance.

[0067] How to use the device described in this application:

[0068] S1. Install the spindle end transition plate 1 onto the end of the workpiece spindle 5, and install the second zero-point positioning system 42 of the center frame quick change device onto the machine tool.

[0069] S2. During the initial installation, install the first zero-point positioning system onto the spindle end transition plate 1;

[0070] S3. Check whether the coaxiality between point D of the central cone sleeve on the first zero-point positioning system and the workpiece spindle 5 is less than 0.01mm. If it meets the requirement, proceed to step S4; otherwise, proceed to step S31.

[0071] S31. Loosen the second set of fixing screws, adjust the position of the base plate of the first zero-point positioning system, and then tighten the second set of fixing screws. Repeat step S3 until the coaxiality of the first zero-point positioning system and the workpiece spindle 5 meets the requirements.

[0072] S4. Place the first pallet vertically against the first zero-point positioning system. The zero-point positioner on the first zero-point positioning system tightens the diamond pin on the first pallet and performs an air test to ensure reliable connection and positioning.

[0073] S5. Check whether the coaxiality between point C of the inner hole of the workpiece fixture 3 and the workpiece spindle 5 is less than 0.01mm. If it meets the requirement, proceed to step S6; otherwise, proceed to step S51.

[0074] S51. Loosen the third set of fixing screws, adjust each set screw 2532 to adjust the position of the workpiece fixture 3, then tighten the third set of fixing screws, and continue with step S5 until the coaxiality of the workpiece fixture 3 and the workpiece spindle 5 meets the requirements, thus completing the initial self-alignment.

[0075] S6. When it is necessary to replace the workpiece fixture 3, repeat step S4 to replace the original workpiece fixture 3 and the first pallet with the workpiece fixture 3 to be replaced and the first pallet.

[0076] S7. Check whether the coaxiality between point C of the inner hole of the workpiece fixture 3 and the workpiece spindle 5 is less than 0.01mm. If it meets the requirement, proceed to step S8; otherwise, proceed to step S71.

[0077] S71. Loosen the third set of fixing screws, adjust each set screw 2532 to adjust the position of the workpiece fixture 3, and then tighten the third set of fixing screws. Continue with step S7 until the coaxiality of the workpiece fixture 3 and the workpiece spindle 5 meets the requirements.

[0078] S8. Place the second pallet 43 vertically against the second zero-point positioning system 42. The zero-point positioner on the second zero-point positioning system 42 tightens the diamond pin on the second pallet 43 and performs an air test to ensure reliable connection and positioning, thus completing the installation of the center frame 41.

[0079] S9. When it is necessary to replace the center frame 41, repeat step S8 to replace the original center frame 41 and the second tray 43 with the center frame 41 to be replaced and the second tray 43.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An intelligent, flexible, adaptive tooling fixture for a large and medium-sized milling and turning machining center, characterized in that, It includes a spindle end quick-change module, which includes: a spindle end transition plate (1), a zero-point quick-change device (2), and a workpiece fixture (3). The spindle end transition plate (1) is installed at the end of the workpiece spindle (5); The zero-point quick-change device (2) is divided into a transition plate side part (21) and a clamp side part (22). The transition plate side part (21) is connected to the spindle end transition plate (1), and the clamp side part (22) is connected to the workpiece clamp (3). After the transition plate side part (21) and the clamp side part (22) are connected, the workpiece spindle (5) can drive the workpiece clamp (3) to rotate coaxially. The workpiece clamp (3) is used to hold the workpiece to be processed.

2. The intelligent flexible adaptive tooling fixture for a large and medium-sized milling and turning composite machining center according to claim 1, characterized in that, The spindle end transition plate (1) is detachably and fixedly connected to the workpiece spindle (5). A first positioning component is provided between the spindle end transition plate (1) and the end of the workpiece spindle (5) for positioning along the axis of the workpiece spindle (5). The first positioning component includes a first disc side positioning part (111) disposed on the spindle end transition plate (1) and a first shaft side positioning part (112) disposed at the end of the workpiece spindle (5). The first disc side positioning part (111) and the first shaft side positioning part (112) are positioned by tapered surface engagement.

3. The intelligent flexible adaptive tooling fixture for a large and medium-sized milling and turning composite machining center according to claim 1, characterized in that, A second positioning component for preliminary angular positioning is provided between the spindle end transition plate (1) and the end of the workpiece spindle (5); the second positioning component includes a second disc side positioning part (121) disposed on the spindle end transition plate (1) and a second shaft side positioning part (122) disposed at the end of the workpiece spindle (5). The second disc side positioning part (121) is a positioning hole / positioning post, and the second shaft side positioning part (122) is a positioning post / positioning hole. The positioning post is inserted into the positioning hole with clearance fit.

4. The intelligent flexible adaptive tooling fixture for a large and medium-sized milling and turning composite machining center according to claim 1, characterized in that, The transition plate side portion (21) is the first zero-point positioning system / first pallet, and the clamp side portion (22) is the first pallet / first zero-point positioning system, with the first zero-point positioning system docking with the first pallet.

5. The intelligent flexible adaptive tooling fixture for a large and medium-sized milling and turning composite machining center according to claim 4, characterized in that, At least two sets of first guide components are provided between the transition disk side portion (21) and the clamp side portion (22). The first guide component includes a first disk side guide portion (231) disposed on the transition disk side portion (21) and a first clamp side guide portion (232) disposed on the clamp side portion (22). The first disk side guide portion (231) is a guide hole / guide pin, and the first clamp side guide portion (232) is a guide pin / guide hole. The guide pin is first inserted into the guide hole to guide the transition disk side portion (21) and the clamp side portion (22), and then the transition disk side portion (21) is connected to the clamp side portion (22).

6. The intelligent flexible adaptive tooling fixture for a large and medium-sized milling and turning composite machining center according to claim 4, characterized in that, A second guide assembly is provided between the transition disk side portion (21) and the fixture side portion (22) to guide along the axis of the workpiece spindle (5). The second guide assembly includes a second disk side guide portion (241) disposed on the spindle end transition disk (1) and a second fixture side guide portion (242) disposed on the fixture side portion (22). The second disk side guide portion (241) is coaxially disposed with the axis of the workpiece spindle (5). The second disk side guide portion (241) and the second fixture side guide portion (242) are guided by a conical surface fit.

7. The intelligent flexible adaptive tooling fixture for a large and medium-sized milling and turning composite machining center according to claim 6, characterized in that, The second disc-side guide portion (241) includes a frustum portion (243), and the second clamp-side guide portion (242) has a conical hole (244). The outer periphery of the frustum portion (243) is engaged with the inner wall conical surface of the conical hole (244). The outer periphery of the frustum portion (243) has at least two annular grooves, so that the frustum portion (243) forms two annular pieces (2431).

8. The intelligent flexible adaptive tooling fixture for a large and medium-sized milling and turning composite machining center according to claim 1, characterized in that, A third guide assembly is provided between the clamp side portion (22) and the workpiece clamp (3) to guide along the axis of the workpiece spindle (5). The third guide assembly includes a third disk side guide portion disposed on the clamp side portion (22) and a third clamp side guide portion disposed on the workpiece clamp (3). The third disk side guide portion is a boss / groove, and the third clamp side guide portion is a groove / boss. The boss and the groove are in clearance fit. An adjustment assembly for adjusting the workpiece fixture (3) to be coaxial with the workpiece spindle (5) is provided between the fixture side portion (22) and the workpiece fixture (3); the adjustment assembly includes multiple threaded through holes (2531) and a corresponding number of set screws (2532). The threaded through holes (2531) are opened on the side wall of the groove and arranged around the axis of the workpiece fixture (3). The sum of the angles between the center lines of any two of the three threaded through holes (2531) and the center line of the remaining threaded through hole (2531) in opposite directions is greater than or equal to 180°. The set screw (2532) passes through the corresponding threaded through hole (2531) and abuts against the side wall of the boss.

9. The intelligent flexible adaptive tooling fixture for a large and medium-sized milling and turning composite machining center according to claim 8, characterized in that, The sidewall of the boss is provided with keyways (2533) corresponding to the number of set screws (2532), and the set screws (2532) rest on the bottom of the keyways (2533).

10. The intelligent flexible adaptive tooling fixture for a large and medium-sized milling and turning composite machining center according to claim 1, characterized in that, It also includes a center frame quick-change device, which includes a center frame (41), a second zero-point positioning system (42) and a second tray (43). The center frame (41) is fixedly connected to the second tray (43), and the second zero-point positioning system (42) is docked with the second tray (43).

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