Detection system for lost foam of casting with complex structure

Abstract

The invention relates to the technical field of detection systems, and provides a detection system for a casting lost foam with a complex structure, which not only can be matched with a mold to form measurement of an outer contour, but also can be matched with the mold to form measurement of an inner cavity contour, and is richer in measurable range formed by the matched mold. The device has the advantages that the applicability to external contours and internal cavity contours of various shapes and specifications is better, the use limitation is further reduced, the measurement data is richer, the device comprises a size detection mechanism and a main body mechanism, the main body mechanism comprises an insertion frame and a handheld frame, and the insertion frame is fixedly connected with the handheld frame. The size detection mechanism comprises two upper rotating frames and two lower rotating frames, the two upper rotating frames are provided with upper laser measuring instruments, the two lower rotating frames are provided with lower laser measuring instruments, linkage contact detection structures are installed in the two upper rotating frames and the two lower rotating frames, the two upper rotating frames are fixedly connected with upper rotating cylinders, and the two lower rotating cylinders are fixedly connected with lower rotating cylinders. And the two lower rotating frames are fixedly connected with lower rotating cylinders.

Description

Technical Field

[0001] The present invention relates to the technical field of detection systems, and particularly relates to a detection system for the lost foam pattern of complex structure castings. Background Art

[0002] As is well known, the lost foam pattern is a forming technology that can be used to fabricate complex parts and structures, and it can also improve production efficiency and product precision. The precision of the lost foam pattern fundamentally determines the precision of the corresponding cast product. To perform dimensional inspection and verification on the lost foam pattern of complex structure castings, we have proposed a detection system for the lost foam pattern of complex structure castings.

[0003] Upon retrieval, a patent with Chinese Patent Publication No. CN118274692B and a patent with Chinese Patent Publication No. CN218723931U respectively disclose a mold precision detection device and a contour measuring instrument. The former is generally described as including a positioning ring for positioning on an extrusion mold. A first gear is rotatably installed at the lower end of the positioning ring. The first gear meshes with a second gear, and the second gear is rotatably installed on the outer ring of the positioning ring. Six groups of movable slots are provided inside the positioning ring. An activity block is arranged in the movable slot. The activity block is inserted with an extrusion block. A first spring is arranged between the extrusion block and the activity block. The inner ring of the positioning ring is rotatably connected to a measuring ring. A measuring mechanism is fixedly installed on the measuring ring. The measuring mechanism includes a rotating seat. The rotating seat is fixedly connected to the measuring ring. A measuring ruler is movably inserted on the rotating seat. A pulley is rotatably installed at one end of the measuring ruler. When in use, first, the extrusion mold is clamped between the six groups of activity blocks. Under the action of the rebounding force of the first spring on the activity block, the pin shaft presses against the wall of the oblique slot, so that the first gear will not deflect by itself. Rotate the rotating seat. The rotating seat drives the measuring ring to rotate along the inner ring of the positioning ring. At the same time, the rotating seat drives the measuring ruler and the pulley to rotate around the outer ring of the casting rod surplus. During the rotation process, the measuring ruler will move, causing the reading on the measuring ruler to change. Take out four groups of readings, take the maximum value and the minimum value among them, and calculate the deviation range value. When the measuring ruler rotates around the outer ring of the casting rod surplus, the measuring ruler will drive the turning rod and the ultra-fine marker to rotate together. At the same time, the rotating seat drives the movable seat and the marker paper and the ultra-fine marker to rotate synchronously. During the rotation process, when the reading of the measuring ruler changes, the measuring ruler will drive the ultra-fine marker to draw a line on the marker paper. After the measuring ruler rotates one circle, lift the ultra-fine marker upward, turn the bolt to release the fixation of the movable seat, take out the movable seat from the placement slot, and then measure the length of the line on the marker paper. The obtained value is the deviation range value. The latter is generally described as including a base. A support frame is fixedly connected to the top of the base. A first motor is fixedly connected to the top of the support frame. The output end of the first motor is fixedly connected to a rotating shaft. The bottom of the rotating shaft is fixedly connected to a mounting frame. Both ends of the mounting frame are respectively located on the rotating shaft and the support column. When in use, place the object to be detected on the placement plate, start the first motor, so that the rotating shaft drives the mounting frame to rotate. At the same time, one end of the mounting frame rotates on the support column and is limited by the limiting plate to make the rotation stable. Thus, the mounting frame drives the camera to rotate around the object to be detected for contour measurement.

[0004] Although the above two existing technical solutions can both achieve the measurement operation of the mold to a certain extent, they mainly measure the external contour dimensions of the mold, and the utilization effect for measuring the cavity inside the mold needs to be further improved, and the measurement data needs to be further enriched. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a detection system for lost foam casting of complex structure castings, which can not only form the measurement of the external contour in cooperation with the mold, but also form the measurement of the internal cavity contour in cooperation with the mold. The measurable range formed in cooperation with the mold is richer, the applicability to external contours and internal cavity contours of various shapes and specifications is better, the use limitations are further reduced, and the measurement data is richer.

[0006] To achieve the above object, the present invention provides the following technical solution: A detection system for lost foam casting of complex structure castings includes a dimension detection mechanism and a main body mechanism. The main body mechanism includes an insertion frame and a handheld frame, and the insertion frame is fixedly connected to the handheld frame. The dimension detection mechanism includes two upper rotating frames and two lower rotating frames. Upper laser measuring instruments are installed on both of the two upper rotating frames, and lower laser measuring instruments are installed on both of the two lower rotating frames. Linkage contact detection structures are installed in both of the two upper rotating frames and both of the two lower rotating frames. Both of the two upper rotating frames are fixedly connected to upper rotating cylinders, and both of the two lower rotating frames are fixedly connected to lower rotating cylinders. The two upper rotating cylinders and the two lower rotating cylinders are all rotatably connected to the insertion frame. Upper synchronous gears are fixedly connected to both of the two upper rotating cylinders, and lower synchronous gears are fixedly connected to both of the two lower rotating cylinders. A linkage transmission structure is installed in the insertion frame, and the linkage transmission structure is used for driving the rotation of the two upper synchronous gears and the rotation of the two lower synchronous gears. A grating ruler is installed in the insertion frame, and the detection end of the grating ruler is connected to the linkage transmission structure. A composite drive structure is installed in the handheld frame, and the composite drive structure is connected and matched with the linkage transmission structure.

[0007] Preferably, all four of the linkage contact detection structures include rotating connection frames and linkage shafts. Side groove cavities are opened in both of the two upper rotating frames and both of the two lower rotating frames. The four rotating connection frames are respectively rotatably connected in the four side groove cavities. The four linkage shafts are respectively arranged in the two upper rotating cylinders and the two lower rotating cylinders. The four linkage shafts are all fixedly connected in the insertion frame. Linkage plates are rotatably connected to the four linkage shafts. The four linkage plates are respectively rotatably connected to the four rotating connection frames. Outer grooves are opened on all four of the rotating connection frames. Detection blocks are slidably connected in the four outer grooves. Pressure sensors are installed in the four outer grooves. The four detection blocks are respectively matched with the pressure receiving surfaces of the four pressure sensors.

[0008] Preferably, all four of the detection blocks are fixedly connected with first elastic springs and second elastic springs. The four first elastic springs are respectively fixedly connected in the four outer grooves, and the four second elastic springs are also respectively fixedly connected in the four outer grooves.

[0009] Preferably, the linkage drive structure includes an upper drive rack and a lower drive rack. Both the upper drive rack and the lower drive rack are slidably connected within the insertion frame. Both of the upper synchronizing gears are meshed with the upper drive rack, and both of the lower synchronizing gears are meshed with the lower drive rack. The upper drive rack and the lower drive rack are both fixedly connected with side racks, and a displacement gear is meshed between the two side racks. The displacement gear is rotatably connected within the insertion frame, and the upper drive rack is connected to the detection end of the grating scale.

[0010] Preferably, a stepped round hole is formed in the insertion frame, a central shaft is fixedly connected within the stepped round hole, the displacement gear is rotationally fitted on the central shaft, and a stepped positioning block is fixedly connected within the stepped round hole through an assembly bolt.

[0011] Preferably, the composite drive structure includes a threaded rod. The threaded rod is slidably connected with the insertion frame. A through hole matching the threaded rod is formed in the hand-held frame. The threaded rod is fixedly connected with the upper drive rack, and a composite nut is installed within the hand-held frame. The composite nut matches the threaded rod.

[0012] Preferably, the composite nut includes an intermediate frame, a first internally threaded half-ring, and a second internally threaded half-ring. The intermediate frame is rotatably connected within the hand-held frame. Both the first internally threaded half-ring and the second internally threaded half-ring are provided with internal threads matching the threaded rod. Both the first internally threaded half-ring and the second internally threaded half-ring are slidably connected with the intermediate frame, and a double positioning component is installed within the intermediate frame.

[0013] Preferably, the double positioning component includes a rotating plate. The rotating plate is rotatably connected with the intermediate frame. A first threaded drive post and a second threaded drive post are fixedly connected to the rotating plate. Round grooves are formed in both the first internally threaded half-ring and the second internally threaded half-ring. Spiral plates are fixedly connected within the two round grooves. The two spiral plates respectively match the first threaded drive post and the second threaded drive post. Two positioning iron blocks are fixedly connected within the intermediate frame, and a permanent magnet is fixedly connected to the rotating plate. Both of the two positioning iron blocks match the permanent magnet.

[0014] Preferably, a pulling cap is fixedly connected to the threaded rod, a round shaft rod is fixedly connected to the hand-held frame, and a hand-held rod is fixedly connected to the round shaft rod.

[0015] Preferably, a reduced-diameter frame is fixedly connected to the bottom end of the insertion frame. A spherical cavity is arranged within the reduced-diameter frame, a rolling ball is arranged within the spherical cavity, and a plurality of through impurity-discharging openings are formed in the reduced-diameter frame.

[0016] Compared with the prior art, the present invention provides a detection system for a lost foam pattern of a complex structure casting, having the following beneficial effects:

[0017] (1) In the present invention, through the design of the main body mechanism, the main body of the detection system for the lost foam pattern of complex structure castings is formed, which facilitates the corresponding installation of the core dimension detection mechanism and also facilitates the operation and holding during use. The overall structure is relatively compact, facilitating the matching insertion with the inner cavity contour of the lost foam pattern of complex structure castings, and further reducing the use limitations.

[0018] (2) In the present invention, through the design of the dimension detection mechanism, the detection functional component of the detection system for the lost foam pattern of complex structure castings is formed. It can not only form the measurement of the external contour in cooperation with the mold, but also form the measurement of the inner cavity contour in cooperation with the mold. The measurable range formed in cooperation with the mold is richer, the applicability to the external contours and inner cavity contours of various shapes and specifications is better, and the measurement data is more abundant.

[0019] (3) In the present invention, through the design of the linkage transmission structure, the adjustment operation of the dimension detection mechanism relative to the main body mechanism can be realized, facilitating the deployment and storage of the dimension detection mechanism relative to the main body mechanism after use. The operation is relatively simple and more practical.

[0020] (4) In the present invention, through the provision of the linkage contact detection structure, the detection and judgment of the unfolded state of the upper rotating frame and the lower rotating frame relative to the inner cavity contour of the lost foam pattern of complex structure castings can be realized. Brief Description of the Drawings

[0021] Figure 1 is a three-dimensional structure schematic diagram of the whole of the present invention; Figure 2 For the present invention Figure 1 is a partial enlarged structure schematic diagram at A in; Figure 3 For the present invention Figure 1 is a partial enlarged structure schematic diagram at B in; Figure 4 is a three-dimensional structure schematic diagram of the partial cross-section of the present invention; Figure 5 is a three-dimensional structure schematic diagram of the upper part of the partial cross-section of the present invention; Figure 6 is a three-dimensional structure schematic diagram of the middle part of the partial cross-section of the present invention; Figure 7 is a three-dimensional structure schematic diagram of the lower part of the partial cross-section of the present invention; Figure 8 is a three-dimensional structure schematic diagram of the horizontal cross-section of the cooperation of the first internal thread half-ring, the second internal thread half-ring and the rotating plate, etc. of the present invention; Figure 9 is a disassembled three-dimensional structure schematic diagram of the horizontal cross-section of the cooperation of the first internal thread half-ring, the second internal thread half-ring and the rotating plate, etc. of the present invention; Figure 10 It is a three-dimensional structural schematic diagram of a partial cross-section of the insertion rack, linkage shaft, linkage plate, etc. in cooperation with the present invention; Figure 11 It is a three-dimensional structural exploded diagram of the hand-held rack, intermediate rack, positioning iron block, etc. in cooperation with the present invention; Figure 12 It is a three-dimensional structural schematic diagram of another angle of the whole of the present invention; Figure 13 For the present invention Figure 12 It is a partial enlarged structural schematic diagram at position C in the present invention; Figure 14 It is a three-dimensional structural schematic diagram of a partial cross-section of the insertion rack, hand-held rack, upper rotating rack, etc. in cooperation with the present invention; Figure 15 It is a bottom three-dimensional structural schematic diagram of a partial cross-section of the insertion rack, linkage shaft, linkage plate, etc. in cooperation with the present invention; Figure 16 It is a three-dimensional structural schematic diagram of the rotation connection rack, pressure sensor, first elastic spring, etc. in cooperation with the present invention; Figure 17 It is a three-dimensional structural schematic diagram of the upper rotating rack and the lower rotating rack rotating and opening relative to the insertion rack of the present invention; Figure 18 It is a partial enlarged structural schematic diagram at position D in item 17 of the present invention; Figure 19 It is a schematic diagram of the principle of external hub formation detection of the present invention relative to the lost foam pattern of complex structure castings; Figure 20 It is a schematic diagram of the principle of internal cavity contour formation detection of the present invention relative to the lost foam pattern of complex structure castings.

[0022] In the figure: 1. Insertion frame; 2. Handheld frame; 3. Upper rotating frame; 4. Lower rotating frame; 5. Upper laser measuring instrument; 6. Lower laser measuring instrument; 7. Upper rotating cylinder; 8. Lower rotating cylinder; 9. Upper synchronous gear; 10. Lower synchronous gear; 11. Grating scale; 12. Rotating connection frame; 13. Linkage shaft; 14. Side groove cavity; 15. Linkage plate; 16. Outer-facing groove; 17. Detection block; 18. Pressure sensor; 19. First elastic spring; 20. Second elastic spring; 21. Upper drive rack; 22. Lower drive rack; 23. Side rack; 24. Opposing movement gear; 25. Step circular hole; 26. Central shaft; 27. Assembly bolt; 28. Step positioning block; 29. Threaded rod; 30. Through port; 31. Intermediate frame; 32. First internal thread half-ring; 33. Second internal thread half-ring; 34. Rotating plate; 35. First threaded drive column; 36. Second threaded drive column; 37. Circular groove; 38. Spiral plate; 39. Positioning iron block; 40. Permanent magnet; 41. Pulling cap; 42. Round shaft rod; 43. Handheld rod; 44. Reduced-diameter frame; 45. Ball cavity; 46. Ball; 47. Through exhaust port; 48. Detection end. Detailed implementation manner

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] For the embodiment, please refer to Figures 1 - 20, A detection system for lost foam casting of complex structure castings, including a dimension detection mechanism, and also including a main body mechanism. The main body mechanism includes an insertion frame 1 and a hand-held frame 2. The insertion frame 1 is fixedly connected to the hand-held frame 2. Through the design of the main body mechanism, the main body of the detection system for lost foam casting of complex structure castings is formed, which facilitates the corresponding installation of the core dimension detection mechanism and also facilitates the operation and holding during use. The overall structure is relatively compact, which is convenient for forming a matching insertion with the inner cavity contour of the lost foam casting of complex structure castings, and the use limitation is further reduced. The dimension detection mechanism includes two upper rotating frames 3 and two lower rotating frames 4. Two upper laser measuring instruments 5 are installed on the two upper rotating frames 3, and two lower laser measuring instruments 6 are installed on the two lower rotating frames 4. Through the design of the dimension detection mechanism, the detection functional components of the detection system for lost foam casting of complex structure castings are formed. It can not only form the measurement of the external contour by supporting the mold, but also form the measurement of the inner cavity contour by supporting the mold. The measurable range formed by supporting the mold is richer, the applicability to external contours and inner cavity contours of various shapes and specifications is better, and the measurement data is more abundant. Linkage contact detection structures are installed in both of the two upper rotating frames 3 and both of the two lower rotating frames 4. The four linkage contact detection structures all include rotating connection frames 12 and linkage shafts 13. Side groove cavities 14 are opened in both of the two upper rotating frames 3 and both of the two lower rotating frames 4. The four rotating connection frames 12 are respectively rotatably connected in the four side groove cavities 14. The four linkage shafts 13 are respectively arranged in the two upper rotating cylinders 7 and the two lower rotating cylinders 8. The four linkage shafts 13 are all fixedly connected in the insertion frame 1. The four linkage shafts 13 are all rotatably connected with linkage plates 15. The four linkage plates 15 are respectively rotatably connected with the four rotating connection frames 12. Outer-facing grooves 16 are opened on the four rotating connection frames 12. Detection blocks 17 are slidably connected in the four outer-facing grooves 16. Pressure sensors 18 are installed in the four outer-facing grooves 16. The four detection blocks 17 respectively match the pressure-receiving surfaces of the four pressure sensors 18. The four detection blocks 17 are all fixedly connected with first elastic springs 19 and second elastic springs 20. The four first elastic springs 19 are respectively fixedly connected in the four outer-facing grooves 16, and the four second elastic springs 20 are also respectively fixedly connected in the four outer-facing grooves 16. Through the provision of the linkage contact detection structure, it is possible to realize the detection and judgment of the unfolded state of the upper rotating frame 3 and the lower rotating frame 4 relative to the inner cavity contour of the lost foam casting of complex structure castings.

[0025] It should be further noted that upper rotating cylinders 7 are fixedly connected to both of the two upper rotating frames 3, lower rotating cylinders 8 are fixedly connected to both of the two lower rotating frames 4, the two upper rotating cylinders 7 and the two lower rotating cylinders 8 are all rotationally connected to the insertion frame 1, upper synchronous gears 9 are fixedly connected to both of the two upper rotating cylinders 7, lower synchronous gears 10 are fixedly connected to both of the two lower rotating cylinders 8, a linkage transmission structure is installed in the insertion frame 1, the linkage transmission structure is used for driving the rotation of the two upper synchronous gears 9 and the rotation of the two lower synchronous gears 10, a grating ruler 11 is installed in the insertion frame 1, and the detection end 48 of the grating ruler 11 is connected to the linkage transmission structure. The linkage transmission structure includes an upper driving rack 21 and a lower driving rack 22. The upper driving rack 21 and the lower driving rack 22 are both slidably connected in the insertion frame 1. The two upper synchronous gears 9 are both meshed with the upper driving rack 21, the two lower synchronous gears 10 are both meshed with the lower driving rack 22. Side racks 23 are fixedly connected to both the upper driving rack 21 and the lower driving rack 22. A displacement gear 24 is meshed between the two side racks 23. The displacement gear 24 is rotationally connected in the insertion frame 1. The upper driving rack 21 is connected to the detection end 48 of the grating ruler 11. A stepped circular hole 25 is formed in the insertion frame 1, a central shaft 26 is fixedly connected in the stepped circular hole 25, the displacement gear 24 is rotationally fitted on the central shaft 26, and a stepped positioning block 28 is fixedly connected in the stepped circular hole 25 through an assembly bolt 27. Through the design of the linkage transmission structure, the adjustment operation of the dimension detection mechanism relative to the main body mechanism can be realized, which is convenient for the deployment and storage of the dimension detection mechanism relative to the main body mechanism after use. The operation is relatively simple and more practical.

[0026] It should be further noted that a composite drive structure is installed inside the handheld frame 2. The composite drive structure is connected and matched with the linkage transmission structure. The composite drive structure includes a threaded rod 29. The threaded rod 29 is slidably connected to the insertion frame 1. A through port 30 matching the threaded rod 29 is provided on the handheld frame 2. The threaded rod 29 is fixedly connected to the upper drive rack 21. A composite nut is installed inside the handheld frame 2. The composite nut is matched with the threaded rod 29. A pulling cap 41 is fixedly connected to the threaded rod 29 to facilitate the quick pulling operation of the threaded rod 29. The composite nut includes an intermediate frame 31, a first internal thread half-ring 32, and a second internal thread half-ring 33. The intermediate frame 31 is rotatably connected inside the handheld frame 2. Both the first internal thread half-ring 32 and the second internal thread half-ring 33 are provided with internal threads matching the threaded rod 29. Both the first internal thread half-ring 32 and the second internal thread half-ring 33 are slidably connected to the intermediate frame 31. A double positioning component is installed inside the intermediate frame 31. The double positioning component includes a rotating plate 34. The rotating plate 34 is rotatably connected to the intermediate frame 31. A first thread driving column 35 and a second thread driving column 36 are fixedly connected to the rotating plate 34. Circular grooves 37 are provided on both the first internal thread half-ring 32 and the second internal thread half-ring 33. Helical plates 38 are fixedly connected to both circular grooves 37. The two helical plates 38 are respectively matched with the first thread driving column 35 and the second thread driving column 36. Two positioning iron blocks 39 are fixedly connected inside the intermediate frame 31. A permanent magnet 40 is fixedly connected to the rotating plate 34. Both positioning iron blocks 39 are matched with the permanent magnet 40 to facilitate the adjustment and limitation of the relative positions of the first internal thread half-ring 32 and the second internal thread half-ring 33. A circular shaft rod 42 is fixedly connected to the handheld frame 2 to facilitate the installation of a matching external shaft sleeve structure. A handheld rod 43 is fixedly connected to the circular shaft rod 42 to facilitate the grasping of the operator. A reduced-diameter frame 44 is fixedly connected to the bottom end of the insertion frame 1. A spherical cavity 45 is provided inside the reduced-diameter frame 44. A rolling ball 46 is provided inside the spherical cavity 45. A plurality of through impurity-discharging ports 47 are provided on the reduced-diameter frame 44, which can discharge the impurities on the rolling ball 46 to the outside.

[0027] The upper laser measuring instrument 5, the lower laser measuring instrument 6, the grating scale 11, and the pressure sensor 18 in this embodiment are all conventional devices well-known to those skilled in the art and purchased on the market. In the present invention, we only use them and do not improve their structures and functions. Their setting methods, installation methods, and electrical connection methods can be adjusted and operated by those skilled in the art as long as they follow the requirements of their user manuals. Therefore, they will not be elaborated here.

[0028] In summary, the working principle of the detection system for the lost foam casting of complex structure castings is as follows. When in use, first, a power supply circuit and an information processing computer host are installed for the upper laser measuring instrument 5, the lower laser measuring instrument 6, the grating scale 11, and the pressure sensor 18 in the detection system for the lost foam casting of complex structure castings. By connecting to the external power supply through the power supply circuit, the power required for the operation of the upper laser measuring instrument 5, the lower laser measuring instrument 6, the grating scale 11, and the pressure sensor 18 can be supplied. Through the information processing computer host, the detection data of the upper laser measuring instrument 5, the lower laser measuring instrument 6, the grating scale 11, and the pressure sensor 18 can be read and corresponding processing can be carried out. When not in use, control the two upper rotating frames 3 and the two lower rotating frames 4 to form a folding and turning-in for storage relative to the insertion frame 1. At this time, the state is as shown in the attached Figure 1 figure. When adjusting the two upper rotating frames 3 and the two lower rotating frames 4 relative to the insertion frame 1, only need to adjust the threaded rod 29 relative to the handheld frame 2. When the threaded rod 29 changes its position relative to the insertion frame 1, it will drive the upper driving rack 21 to move. Since the two upper synchronous gears 9 are both meshed with the upper driving rack 21, the movement of the upper driving rack 21 will drive the two upper synchronous gears 9 to rotate synchronously. The rotation of the two upper synchronous gears 9 drives the two upper rotating cylinders 7 to rotate, and the rotation of the upper rotating cylinders 7 drives the two upper rotating frames 3 to rotate. Since the movement of the upper driving rack 21 will drive the side rack 23 fixedly connected to it to move synchronously, and the two side racks 23 are both meshed with the displacement gear 24, the movement of one side rack 23 will drive the other side rack 23 to form synchronous movement, that is, the lower driving rack 22 will form a relative movement following the movement of the upper driving rack 21. Since the two lower synchronous gears 10 are both meshed with the lower driving rack 22, the movement of the lower driving rack 22 will achieve the synchronous rotation of the two lower synchronous gears 10. The rotation of the two lower synchronous gears 10 drives the two lower rotating cylinders 8 to rotate, and the rotation of the lower rotating cylinders 8 drives the two lower rotating frames 4 to rotate. When the threaded rod 29 is pulled upward relative to the insertion frame 1, the two upper rotating frames 3 and the two lower rotating frames 4 will both rotate and retract relative to the insertion frame 1. When the threaded rod 29 is further inserted downward relative to the insertion frame 1, the two upper rotating frames 3 and the two lower rotating frames 4 will both rotate and extend relative to the insertion frame 1.

[0029] Further, when the threaded rod 29 is adjusted relative to the insertion frame 1, there are two adjustment methods: rapid adjustment and slow adjustment. During slow adjustment, the rotating plate 34 is rotated and pushed up relative to the intermediate frame 31, so that the permanent magnet 40 forms a relative magnetic attraction with one of the positioning iron blocks 39 near the upper side. Under the action of this relative magnetic attraction, the rotation and lifting limit of the rotating plate 34 is realized. Under the driving action of the first threaded driving column 35 and the second threaded driving column 36 on the two spiral plates 38 respectively, when the rotating plate 34 rotates and rises, the first internal thread half-ring 32 and the second internal thread half-ring 33 will approach each other relatively. In this state, the two internal threads are closed to form a complete transmission thread matching the threaded rod 29. After that, by rotating the first internal thread half-ring 32 and the second internal thread half-ring 33, the slow adjustment of the threaded rod 29 relative to the insertion frame 1 can be realized. During rapid adjustment, the rotating plate 34 is rotated down relative to the intermediate frame 31, so that a relative magnetic attraction is formed between one of the positioning iron blocks 39 near the lower side and the permanent magnet 40. In this way, the first internal thread half-ring 32 and the second internal thread half-ring 33 will be separated from each other, and the internal thread will be separated from the threaded rod 29. In this state, by pulling the cap 41, the rapid pulling adjustment of the threaded rod 29 relative to the insertion frame 1 can be realized. After the rapid pulling adjustment is completed, the rotating plate 34 should be rotated and lifted again relative to the intermediate frame 31, so that the internal thread and the threaded rod 29 form a relative driving action again, realizing the auxiliary limit of the threaded rod 29 relative to the insertion frame 1. When it is necessary to measure the inner cavity contour of a complex structure casting lost foam pattern, first, the threaded rod 29 is adjusted to control the rotation and retraction of the two upper rotating frames 3 and the two lower rotating frames 4 relative to the insertion frame 1. Then, the insertion frame 1 is inserted from the opening of the inner cavity contour. After the two lower rotating frames 4 and the two upper rotating frames 3 enter the inner cavity contour and the rolling balls 46 contact the inner bottom surface of the inner cavity contour, by adjusting the threaded rod 29, the two upper rotating frames 3 and the two lower rotating frames 4 are rotated out relative to the insertion frame 1. During the movement of the upper driving rack 21, the grating ruler 11 reads the moving distance of the upper driving rack 21 by detecting the change amount of the detection end 48. Since there is a meshing transmission relationship between the upper driving rack 21 and the upper synchronous gear 9, the meshing surface of the upper synchronous gear 9 and the upper driving rack 21 have the same moving distance. According to the arc length formula of the sector, the rotation angle of the corresponding upper synchronous gear 9 can be calculated, and finally the rotation angle of the upper rotating frame 3 connected to the upper synchronous gear 9 can be obtained. Similarly, according to the measurement data of the grating ruler 11, the rotation angle of the lower synchronous gear 24 can be obtained through conversion, and then the rotation angle of the lower rotating frame 4 relative to the insertion frame 1 can be obtained. To facilitate the correspondence between the rotation angle and the measurement data of the grating ruler 11, the corresponding relationship between different measurement data of the grating ruler 11 and the rotation angle is pre-adjusted and recorded for convenient corresponding call during the actual detection process.

[0030] Further, during the process of the upper rotating frame 3 and the lower rotating frame 4 rotating out relative to the insertion frame 1, they will drive the rotating connection frame 12 connected thereto to rotate. Under the traction of the linkage plate 15 and the linkage shaft 13, the rotating connection frame 12 always remains parallel to the insertion frame 1. When the detection block 17 comes into contact with the side wall of the inner cavity profile and generates an interaction force, the pressure sensor 18 corresponding to the detection block 17 will form a change in the pressure reading. By adjusting the threaded rod 29 relative to the insertion frame 1, the change value of the pressure sensor 18 is made to be within the set value. The selection of the set value can be made according to actual usage needs to ensure that the detection block 17 is in contact with the side wall of the inner cavity profile, and the relative force between the detection block 17 and the inner side wall of the inner cavity profile does not damage the inner cavity profile. Then, the adjustment of the threaded rod 29 relative to the insertion frame 1 is stopped, and the two upper laser measuring instruments 5 and the two lower laser measuring instruments 6 are turned on, and the insertion frame 1 is controlled to form a relative displacement within the inner cavity profile. For the case where the four pressure sensors 18 can all come into contact with the inner side wall of the inner cavity profile, by applying a driving force perpendicular to the directions of the forces detected by the four pressure sensors 18 to the hand-held rod 43, the movement of the insertion frame 1 can be achieved. Under the combined action of the four first elastic springs 19 and the four second elastic springs 20, the detection values of the four pressure sensors 18 can be adjusted to be autonomously equal or approximately equal, so as to keep the movement track of the insertion frame 1 centered relative to the inner cavity profile. During the displacement process, the insertion frame 1 has a relatively centered movement track. When it is restricted by the internal structure of the inner cavity profile and it is impossible to form appropriate pressure readings for all four pressure sensors 18, it is necessary to ensure that at least two pressure sensors 18 have pressure readings within the set value. When necessary, on the premise of applying a driving force perpendicular to the directions of the forces detected by the two pressure sensors 18 to the hand-held rod 43, an auxiliary force should be applied to the two pressure sensors 18 within the set value range to keep the two pressure sensors 18 within the set value range, so as to ensure the certainty of the track during the movement of the insertion frame 1. Since the movement track of the insertion frame 1 is determined, the complete measurement of the inner cavity profile will be formed according to the detection values of the upper laser measuring instrument 5 and the lower laser measuring instrument 6. The measurement data is read and calculated by the information processing computer host, and the data of the inner cavity profile after processing is matched and compared with the design data of the lost foam pattern of the complex structure casting to realize the detection of the lost foam pattern of the complex structure casting. For the detection of the outer contour of the lost foam pattern of the complex structure casting, since the detection of the outer contour is not affected by the placeable space, it is only necessary to control the upper rotating frame 3 and the lower rotating frame 4 to rotate out relative to the insertion frame 1, so that the upper laser measuring instrument 5 and the lower laser measuring instrument 6 are exposed. Finally, the upper laser measuring instrument 5 and the lower laser measuring instrument 6 on the same side are used to scan the outer contour of the lost foam pattern of the complex structure casting. During the scanning of the outer contour, to ensure the reference of the movement tracks of the upper laser measuring instrument 5 and the lower laser measuring instrument 6,The use of the detection system for the lost foam casting of complex structure castings can be realized through external track assistance. Since the upper laser measuring instrument 5 and the lower laser measuring instrument 6 on the same side have upper and lower cross-coverage, the single measurement range is wider and the operation convenience is better.

[0031] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A detection system for lost foam castings with complex structures, comprising a dimension detection mechanism, characterized in that: The invention also comprises a main body mechanism, wherein the main body mechanism comprises an insertion frame (1) and a hand-held frame (2), wherein the insertion frame (1) is fixedly connected to the hand-held frame (2), wherein the size detection mechanism comprises two upper rotating frames (3) and two lower rotating frames (4), wherein the two upper rotating frames (3) are each equipped with an upper laser measuring instrument (5), wherein the two lower rotating frames (4) are each equipped with a lower laser measuring instrument (6), wherein a linkage contact detection structure is each equipped in the two upper rotating frames (3) and the two lower rotating frames (4), wherein the two upper rotating frames (3) are each fixedly connected to an upper rotating cylinder (7), wherein the two lower rotating frames (4) are each fixedly connected to a lower rotating cylinder (8), wherein the two upper rotating cylinders (7) are each equipped with a lower rotating cylinder (9), wherein the two upper rotating cylinders (7) are each equipped with a lower rotating cylinder (10), wherein the two upper rotating cylinders (7) are each equipped with a lower rotating cylinder (11), wherein the two lower rotating cylinders (7) are each equipped with a lower rotating cylinder (12), wherein the two upper rotating cylinders (7) are each equipped with a lower rotating cylinder (13), wherein the two lower rotating cylinders (7) are each equipped with a lower rotating cylinder (14), wherein the two upper rotating cylinders (7) are each equipped with a lower rotating cylinder (15), wherein the two upper rotating cylinders (7) are each equipped with a lower rotating cylinder (16), wherein the two lower rotating cylinders (7) are each equipped with a lower rotating cylinder (17), wherein the two upper rotating cylinders (7) are each equipped with a lower rotating cylinder (18), wherein the two upper rotating cylinders (7) are each equipped with a lower rotating cylinder (19), wherein the two lower rotating cylinders (7) are each equipped with a lower rotating cylinder (11), wherein the two upper rotating cylinders (7) are each equipped with a lower rotating cylinder (12), wherein the two lower rotating cylinders (7) are each equipped with a lower rotating cylinder (12), wherein the two upper rotating cylinders (7) are each equipped with a lower rotating cylinder (1 ) and the two lower rotating cylinders (8) are both rotationally connected to the insertion frame (1), the two upper rotating cylinders (7) are both fixedly connected to the upper synchronous gears (9), the two lower rotating cylinders (8) are both fixedly connected to the lower synchronous gears (10), a linkage transmission structure is installed in the insertion frame (1), the linkage transmission structure is used for rotationally driving the two upper synchronous gears (9) and the two lower synchronous gears (10), a grating ruler (11) is installed in the insertion frame (1), the detection end (48) of the grating ruler (11) is connected to the linkage transmission structure, and a composite drive structure is installed in the handheld frame (2), and the composite drive structure is connected and matched with the linkage transmission structure.

2. A detection system for lost foam castings with complex structures according to claim 1, characterized in that: The four linkage contact detection structures each comprise a rotating frame (12) and a linkage shaft (13); a side groove cavity (14) is provided in each of the two upper rotating frames (3) and the two lower rotating frames (4); the four rotating frames (12) are rotatably connected in the four side groove cavities (14); the four linkage shafts (13) are respectively arranged in the two upper rotating cylinders (7) and the two lower rotating cylinders (8); the four linkage shafts (13) are fixedly connected in the insertion frame (1); the four linkage shafts (13) are rotatably connected to a linkage plate (15); the four linkage plates (15) are rotatably connected to the four rotating frames (12); the four rotating frames (12) are each provided with an outward groove (16); a detection block (17) is slidably connected in each of the four outward grooves (16); a pressure sensor (18) is installed in each of the four outward grooves (16); the four detection blocks (17) are respectively matched with the pressure-bearing surfaces of the four pressure sensors (18).

3. A detection system for lost foam castings with complex structures according to claim 2, characterized in that: The four detection blocks (17) are all fixedly connected to a first elastic spring (19) and a second elastic spring (20); the four first elastic springs (19) are respectively fixedly connected in the four outward grooves (16); and the four second elastic springs (20) are also respectively fixedly connected in the four outward grooves (16).

4. A detection system for lost foam castings with complex structures according to claim 3, characterized in that: The linkage transmission structure comprises an upper drive rack (21) and a lower drive rack (22), the upper drive rack (21) and the lower drive rack (22) are both slidably connected in the insertion frame (1), the two upper synchronous gears (9) are both meshed with the upper drive rack (21), the two lower synchronous gears (10) are both meshed with the lower drive rack (22), the upper drive rack (21) and the lower drive rack (22) are both fixedly connected with a side rack (23), a counter-shift gear (24) is meshed between the two side racks (23), and the counter-shift gear (24) is rotatably connected in the insertion frame (1), and the upper drive rack (21) is connected to the detection end (48) of the grating ruler (11).

5. The detection system for lost foam castings with complex structures according to claim 4, characterized in that: The insertion frame (1) is provided with a stepped circular hole (25), a central shaft (26) is fixedly connected in the stepped circular hole (25), the counter-shift gear (24) is rotatably engaged with the central shaft (26), and a stepped positioning block (28) is fixedly connected in the stepped circular hole (25) via an assembly bolt (27).

6. A detection system for lost foam castings with complex structures according to claim 5, characterized in that: The composite drive structure comprises a threaded rod (29), the threaded rod (29) being slidably connected to the insertion frame (1), a through opening (30) matching the threaded rod (29) being provided on the hand-held frame (2), the threaded rod (29) being fixedly connected to the upper drive rack (21), and a composite nut being installed in the hand-held frame (2), the composite nut matching the threaded rod (29).

7. A detection system for lost foam castings with complex structures according to claim 6, characterized in that: The composite nut comprises an intermediate frame (31), a first internally threaded half ring (32) and a second internally threaded half ring (33); the intermediate frame (31) is rotatably connected in the hand-held frame (2); the first internally threaded half ring (32) and the second internally threaded half ring (33) are both provided with internal threads matching the threaded rod (29); the first internally threaded half ring (32) and the second internally threaded half ring (33) are both slidably connected to the intermediate frame (31); and a double positioning assembly is installed in the intermediate frame (31).

8. The detection system for lost foam castings with complex structures according to claim 7, characterized in that: The double positioning assembly comprises a rotating plate (34), the rotating plate (34) being rotatably connected to the intermediate frame (31), a first threaded driving column (35) and a second threaded driving column (36) being fixedly connected to the rotating plate (34), the first internal threaded half ring (32) and the second internal threaded half ring (33) both being provided with a circular groove (37), a spiral plate (38) being fixedly connected in the two circular grooves (37), the two spiral plates (38) being matched with the first threaded driving column (35) and the second threaded driving column (36) respectively, two positioning iron blocks (39) being fixedly connected in the intermediate frame (31), a permanent magnet (40) being fixedly connected to the rotating plate (34), and the two positioning iron blocks (39) being matched with the permanent magnet (40).

9. The detection system for lost foam castings with complex structures according to claim 8, characterized in that: A pull cap (41) is fixedly connected to the threaded rod (29), a round shaft rod (42) is fixedly connected to the hand-held frame (2), and a hand-held rod (43) is fixedly connected to the round shaft rod (42).

10. A detection system for lost foam castings with complex structures according to claim 9, characterized in that: The bottom end of the insertion frame (1) is fixedly connected to a reducing frame (44), a ball cavity (45) is provided in the reducing frame (44), a rolling ball (46) is provided in the ball cavity (45), and a plurality of through-going impurity discharge openings (47) are provided on the reducing frame (44).

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