Impeller cone disc compression molding device and machining method

Abstract

The invention discloses an impeller cone disc pressing forming device and a machining method, and relates to the technical field of mold forming. The impeller cone disc pressing forming device comprises a lower mold assembly and an upper mold assembly; the lower die assembly comprises a lower die base, a center ring body, a first movable ring body, a second movable ring body and a third movable ring body. The center ring body is vertically arranged and installed in the center of the upper surface of the lower die base. The first movable ring body sleeves the outer side wall of the central ring body, the second movable ring body sleeves the outer side wall of the first movable ring body, and the third movable ring body sleeves the outer side wall of the second movable ring body; and the first movable ring body, the second movable ring body and the third movable ring body are respectively connected with the lower die holder through nitrogen springs. The center ring body with the fixed height is used for pressing and forming the convex ring part of the impeller cone disc, and the first movable ring body, the second movable ring body and the third movable ring body which can move longitudinally are used for pressing and forming the disc body part of the impeller cone disc in stages, so that the problem that the impeller cone disc is wrinkled in the pressing and machining process is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of mold forming, and in particular to an impeller cone disk pressing forming device and a processing method. Background Art

[0002] Impeller cone is the raw material for processing blower blades.

[0003] The impeller cone includes a convex ring portion and a disc body portion which are integrally fixedly connected, and is usually obtained by pressing a flat blank ring by a die. The blank ring is usually made of metal material.

[0004] During the press forming process of the disc body, since the metal is fluid and will rebound after stamping, wrinkles will appear on the outer circle and the taper may not meet the design requirements, which will increase the defective rate and reduce the quality of the final product. Summary of the invention

[0005] In order to overcome the problem of "wrinkles appearing on the disc body of the impeller cone disc during the pressing and forming process" existing in the above-mentioned background technology, the present invention provides an impeller cone disc pressing and forming device and a processing method.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: A device for pressing and forming an impeller cone disk, comprising a lower die assembly and an upper die assembly placed directly above the lower die assembly; the lower die assembly comprises a lower die base, a center ring body, a first movable ring body, a second movable ring body, and a third movable ring body; the center ring body is upright and installed at the center position of the upper surface of the lower die base; the first movable ring body is sleeved on the outer wall position of the center ring body, the second movable ring body is sleeved on the outer wall position of the first movable ring body, and the third movable ring body is sleeved on the outer wall position of the second movable ring body; the first movable ring body, the second movable ring body and the third movable ring body are respectively connected to the lower die base through nitrogen springs; a positioning groove is provided at the outer edge position of the top surface of the center ring body; the upper die assembly is provided with an upper molding surface; the top of the first movable ring body, the top of the second movable ring body and the top of the third movable ring body are respectively provided with lower molding surfaces adapted to the upper molding surface.

[0007] As a further optimization solution of the present invention, the upper molding surface is in the shape of an upward concave cone disk.

[0008] As a further optimization solution of the present invention, the upper mold assembly is provided with a center ring body accommodating groove; the center ring body accommodating groove is located at the center position of the upper molding surface and is adapted to the top end of the center ring body.

[0009] As a further optimization solution of the present invention, in a non-pressurized state, the first movable ring body, the second movable ring body and the third movable ring body are located at the same height.

[0010] As a further optimization scheme of the present invention, a central accommodating groove and a supporting annular surface are provided on the upper surface of the lower mold base, and the supporting annular surface is stepped to respectively support the first movable ring body, the second movable ring body and the third movable ring body through nitrogen springs.

[0011] As a further optimization solution of the present invention, the central accommodating groove is placed at the center of the supporting annular surface.

[0012] As a further optimization solution of the present invention, the central ring body can rotate along its own axis; and an expansion structure is provided on the top of the central ring body.

[0013] As a further optimization scheme of the present invention, the upper mold assembly is provided with a traveling cavity, and the bottom end of the side wall of the traveling cavity is provided with a contact ring with a cross-section in the shape of an equilateral triangle; a buckling ring capable of longitudinal movement is provided in the traveling cavity, and a lower extension ring body is provided at the outer edge position of the lower surface of the buckling ring, and the lower surface of the lower extension ring body is provided with an adapting conical surface adapted to the upper surface of the contact ring; the center ring body accommodating groove is placed at the lower surface position of the buckling ring.

[0014] As a further optimization scheme of the present invention, the expansion structure includes a push rod, a friction-reducing wheel and a dual-axis hydraulic cylinder; the two ends of the push rod are respectively connected to the friction-reducing wheel and the dual-axis hydraulic cylinder, and the friction-reducing wheel is placed horizontally; the dual-axis hydraulic cylinder can drive the friction-reducing wheel to extend or retract from the plug-in hole at the top of the side wall of the center ring body; the friction-reducing wheel is placed horizontally; the push rod is provided with two and is respectively connected to the two output shafts of the dual-axis hydraulic cylinder, and the friction-reducing wheel is provided with two and is respectively placed in the two plug-in holes.

[0015] A processing method for pressing and forming an impeller cone disk, using an impeller cone disk pressing and forming device to press a blank ring, the steps comprising: S1, opening the mold; S2, clamping the inner edge of the flat blank ring into the positioning groove of the center ring body; S3, using a hydraulic press to drive the upper mold assembly downward to close the mold, during which the upper molding surface is sequentially crimped with the third movable ring body, the second movable ring body and the first movable ring body, and the blank ring is pressed and formed into an impeller cone disk, and the convex ring portion of the impeller cone disk is sleeved and fitted on the side wall of the center ring body; S4, the buckle ring moves upward to separate the upper surface of the abutment ring from the adapter cone surface and form a clearance gap; the clearance gap is placed on the outer side wall of the convex ring portion; S5, The double-axis hydraulic cylinder pushes the anti-friction wheel to extend out of the plug-in hole, so that the anti-friction wheel is crimped at the inner side wall of the convex ring part, and the anti-friction wheel can push the side wall of the convex ring part at the crimping position to bend outward; S6, the central ring body rotates, driving the expansion structure to rotate synchronously, the anti-friction wheel rolls along the inner wall of the convex ring part and pushes the side wall of the convex ring part at the crimping position to bend outward; S7, the double-axis hydraulic cylinder pulls the anti-friction wheel back into the plug-in hole; S8, the upper mold assembly is driven upward by a hydraulic press to open the mold. During the process, the convex ring part rebounds inward and the nitrogen spring stretches and resets, so that the convex ring part is pulled out of the abutment ring, and the impeller cone disk falls and is crimped on the upper surface of the third movable ring body.

[0016] In summary, the present invention is beneficial in that: (1) The present invention has a simple structure and reliable functions. The central ring body with a fixed height is used to press and form the convex ring part of the impeller cone disk. The first movable ring body, the second movable ring body and the third movable ring body that can move longitudinally are used to press and form the disk body part of the impeller cone disk in stages, thereby avoiding the problem of wrinkles in the pressing process of the impeller cone disk.

[0017] (2) A positioning slot is provided at the outer edge of the top surface of the center ring body, and the positioning slot can be adapted to engage with the inner edge of the blank ring, so that the flat blank ring can be stably placed horizontally at the top position of the center ring body, thereby achieving convenient loading and positioning.

[0018] (3) The buckle ring can be separated from the adapting cone surface upward and form a clearance gap, which is used to provide an accommodation space for the extension of the anti-friction wheel and the bending of the convex ring part; when the anti-friction wheel extends outward, the convex ring part can be excessively bent. After the anti-friction wheel is removed, the convex ring part can rebound to present a cylindrical shape with a constant diameter rather than a truncated cone shape with a gradually decreasing diameter, so as to meet the processing and subsequent use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present application is further described below with reference to the accompanying drawings: Figure 1It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the vertical section structure of the lower mold component; Figure 3 It is a schematic diagram of the vertical section structure of the central ring body; Figure 4 It is a schematic diagram of the vertical section structure of the upper mold assembly; Figure 5 This is a schematic diagram of the placement of the impeller cone after mold opening; Figure 6 It is a schematic diagram of the state of the lower die assembly forming the impeller cone disk in the pressing state; Figure 7 It is a schematic diagram of the positions of the first bearing, the drive motor and the buckle ring; Figure 8 It is a schematic diagram of the cross-sectional structure of the abutment ring; Fig. 9 It is a schematic diagram of the vertical section structure of the buckle ring; Fig.10 To give way to the gap position and structural diagram; Fig.11 It is a half-section schematic diagram of the expansion structure; Fig.12 It is a schematic diagram of the installation position and structure of the expansion structure and the fixing frame; Fig.13 It is a schematic diagram of the connection structure between the push rod and the anti-friction wheel; Fig.14 This is a top view of the countersunk hole installation position.

[0020] Description of reference numerals: In the figure, 1. Lower die assembly; 11. Lower die seat; 111. Spring receiving hole; 112. Center receiving groove; 113. Support annular surface; 12. Center ring body; 121. Positioning slot; 122. Inner extension ring body; 1221. Countersunk hole; 123. Expansion structure; 1231. Push rod; 1232. Friction-reducing wheel; 1233. Dual-axis hydraulic cylinder; 1234. Fixed frame; 12341. Support plate; 12342. Support leg; 12343. Support foot; 124. Plug-in hole; 13. First movable ring body; 14. Second movable ring body; 15. Third movable ring body; 16. Nitrogen spring; 17. First bearing; 171. Outer ring body; 172. Inner ring body; 18. Driving motor; 19. Bearing sealing plate; 2. Upper mold assembly; 21. Upper molding surface; 22. Center ring body receiving groove; 221. Vertical ring surface; 23. Travel cavity; 231. Abutment ring; 24. Buckle ring; 2401. Clearance; 241. Lower extension ring body; 2411. Adaptive cone surface; 25. Linear drive; 3. blank ring; 31. impeller cone; 311. convex ring portion; 312. disk body portion. DETAILED DESCRIPTION

[0021] Based on the above structural features of the present application, the implementation methods of the present application are further described: Reference Figure 6 The final product produced by the equipment and method technologies in the present invention is an impeller cone 31, and the impeller cone 31 includes a convex ring portion 311 and a disc body portion 312 that are fixedly connected in one piece.

[0022] Reference Figure 1-2 The present embodiment provides an impeller cone disk pressing and forming device, comprising a lower die assembly 1 and an upper die assembly 2 placed directly above the lower die assembly 1. The lower die assembly 1 is detachably mounted on the upper side of the hydraulic press workbench by bolts, and the upper die assembly 2 is detachably mounted on the lower surface of the hydraulic press die base fixing plate by bolts. The hydraulic press drives the upper die assembly 2 to move up and down to realize mold opening and mold closing.

[0023] Reference Figure 2 The lower die assembly 1 includes a lower die base 11, a center ring body 12, a first movable ring body 13, a second movable ring body 14, and a third movable ring body 15; the center ring body 12 is vertically arranged and installed at the center position of the upper surface of the lower die base 11; the first movable ring body 13 is sleeved on the outer wall position of the center ring body 12, the second movable ring body 14 is sleeved on the outer wall position of the first movable ring body 13, and the third movable ring body 15 is sleeved on the outer wall position of the second movable ring body 14; the first movable ring body 13, the second movable ring body 14 and the third movable ring body 15 can all move up and down independently. The first movable ring body 13, the second movable ring body 14 and the third movable ring body 15 are respectively connected to the lower die base 11 through nitrogen springs 16. A plurality of nitrogen springs 16 are provided. At least four upright nitrogen springs 16 are evenly arranged at the bottom of the first movable ring body 13, at least four upright nitrogen springs 16 are evenly arranged at the bottom of the second movable ring body 14, and at least six upright nitrogen springs 16 are evenly arranged at the bottom of the third movable ring body 15, thereby ensuring that the first movable ring body 13, the second movable ring body 14 and the third movable ring body 15 can maintain a horizontal state during the up and down movement.

[0024] Reference Figure 1 and Figure 3 A positioning slot 121 is provided at the outer edge of the top surface of the center ring body 12; the positioning slot 121 is in a circular shape, and the inner side wall of the positioning slot 121 can fit the inner side wall of the blank ring 3, so that the blank ring 3 can be stably placed on the center ring body 12 during loading.

[0025] Reference Figure 1 to Figure 4The upper mold assembly 2 is provided with an upper molding surface 21, and the upper molding surface 21 is used to press and mold the upper surface of the impeller cone disk 31. The upper molding surface 21 is in the shape of an upward concave cone disk. The top of the first movable ring body 13, the top of the second movable ring body 14, and the top of the third movable ring body 15 are respectively provided with lower molding surfaces adapted to the upper molding surface 21, and the lower molding surfaces are used to press and mold the lower surface of the impeller cone disk 31. The three lower molding surfaces can be spliced ​​to form an upward convex cone disk shape.

[0026] Reference Figure 1 to Figure 4 The upper mold assembly 2 is provided with a center ring body receiving groove 22. The center ring body receiving groove 22 is located at the center of the upper molding surface 21 and is adapted to the top of the center ring body 12. The center ring body receiving groove 22 is in the shape of a straight cylindrical with a constant diameter, so that the center ring body 12 can be easily drawn out of the center ring body receiving groove 22.

[0027] Reference Figure 2 and Figure 5 In the non-pressurized state, the first movable ring body 13, the second movable ring body 14 and the third movable ring body 15 are located at the same height position (for example, by setting the maximum stroke and height position of the nitrogen spring 16), so that after pressing and mold opening, the third movable ring body 15 can push the outer edge of the impeller cone disk 31 to make the impeller cone disk 31 upward and demolded. During the process, the hole in the middle of the impeller cone disk 31 can be detached from the outer edge position of the center ring body 12. Finally, the hole in the middle of the impeller cone disk 31 is located above the center ring body 12, and the user's finger or the finger clamp of the robot arm can be inserted into the hole in the middle of the impeller cone disk 31, so as to realize convenient clamping and removal of the impeller cone disk 31.

[0028] Reference Figure 1 , Figure 2 and Figure 4 The upper surface of the lower die base 11 is provided with a central receiving groove 112 and a supporting annular surface 113, and the supporting annular surface 113 is stepped to respectively support the first movable ring body 13, the second movable ring body 14 and the third movable ring body 15 through the nitrogen spring 16. Since the first movable ring body 13, the second movable ring body 14 and the third movable ring body 15 all need to adapt to the upper concave molding surface 21, the stepped supporting annular surface 113 is required to make the first movable ring body 13, the second movable ring body 14 and the third movable ring body 15 have different height differences after being pressed.

[0029] Reference Figure 2 The central receiving groove 112 is placed at the center of the supporting annular surface 113 .

[0030] Reference Figure 6 and Figure 7, the center ring body 12 can rotate along its own axis; an expansion structure 123 is provided on the top of the center ring body 12. The expansion structure 123 is used to push the convex ring portion 311 to bend outward, so that the convex ring portion 311 can present a cylindrical shape with a constant diameter instead of a truncated cone shape with a gradually decreasing diameter after rebounding, so as to meet the processing requirements. The expansion structure 123 adopts point expansion instead of circumferential expansion, so when the center ring body 12 rotates, the expansion structure 123 rotates with it, so that all side walls within the circumference of the convex ring portion 311 are subjected to a bending force pushing outward.

[0031] Reference Figure 7 The bottom end of the central receiving groove 112 is provided with a first bearing 17, and the first bearing 17 includes an outer ring body 171 and an inner ring body 172 connected by balls and capable of relatively rotating; the outer ring body 171 is fixedly installed in the central receiving groove 112 by bolts, and the inner ring body 172 is fixedly connected to the central ring body 12. The bottom end of the inner wall of the central ring body 12 is provided with an inner extension ring body 122 (for example, through an integrated fixed connection), and a countersunk hole 1221 is provided on the upper surface of the inner extension ring body 122; a first screw hole adapted to the countersunk hole 1221 is provided on the top surface of the inner ring body 172, and the inner extension ring body 122 is provided with a countersunk hole 1221, and a first screw hole adapted to the countersunk hole 1221 is provided at the bottom edge of the central receiving groove 112, and bolts are installed in the countersunk hole 1221 and the first screw hole, and the bolt is crimped in the countersunk hole 1221 and screwed with the first screw hole to achieve fixed connection between the central ring body 12 and the inner ring body 172. The inner edge of the inner ring body 172 is provided with an internal tooth structure, and a drive motor 18 is fixedly installed on the inner wall of the lower mold base 11 by bolts. A transmission gear is fixedly installed on the output shaft of the drive motor 18 by bolts. The transmission gear is meshed with the internal tooth structure, so that the drive motor 18 can drive the inner ring body 172 and the center ring body 12 to rotate.

[0032] Reference Figure 7 A bearing sealing plate 19 is installed on the bottom surface of the lower die seat 11 by bolts. After the bearing sealing plate 19 is removed, the bearing can be loaded and unloaded.

[0033] Reference Figure 7 to Figure 9 The upper mold assembly 2 is provided with a travel cavity 23, which is a straight cylindrical structure with a constant diameter. The bottom end of the side wall of the travel cavity 23 is provided with an abutment ring 231 with a cross-section in the shape of an equilateral triangle, and the upper surface of the abutment ring 231 is inwardly concave. A buckle ring 24 capable of longitudinal movement is provided in the travel cavity 23, and the buckle ring 24 is horizontally placed. A lower extension ring body 241 is provided at the outer edge of the lower surface of the buckle ring 24, and an adapting conical surface 2411 adapted to the upper surface of the abutment ring 231 is provided on the lower surface of the lower extension ring body 241; the central ring body receiving groove 22 is placed on the lower surface of the buckle ring 24.

[0034] Reference Figure 7A vertical linear drive 25 is provided in the traveling cavity 23. The fixed end of the linear drive 25 is fixedly connected to the top surface of the traveling cavity 23 by bolts. The output shaft of the linear drive 25 is fixedly connected to the top surface of the buckle ring 24 by bolts. The linear drive 25 can drive the buckle ring 24 to move up and down in the traveling cavity 23, thereby controlling the opening and closing of the clearance gap 2401. The clearance gap is located at the outer wall of the convex ring portion 311. The clearance gap is used to provide accommodation space for the extension of the anti-friction wheel 1232 and the bending of the convex ring portion 311. Reference Figure 10 to Figure 12 The expansion structure 123 includes a push rod 1231, a friction-reducing wheel 1232 and a double-axis hydraulic cylinder 1233; the two ends of the push rod 1231 are respectively connected to the friction-reducing wheel 1232 and the double-axis hydraulic cylinder 1233, and the friction-reducing wheel 1232 is horizontally placed; the double-axis hydraulic cylinder 1233 can drive the friction-reducing wheel 1232 to extend or retract from the plug-in hole 124 at the top of the side wall of the central ring body 12; the friction-reducing wheel 1232 is horizontally placed; two push rods 1231 are provided and are respectively connected to the two output shafts of the double-axis hydraulic cylinder 1233, and two friction-reducing wheels 1232 are provided and are respectively placed in two plug-in holes 124. Each expansion structure 123 includes two push rods 1231, two friction-reducing wheels 1232 and a double-axis hydraulic cylinder 1233; the expansion structure 123 is horizontally placed in the central ring body 12 and is arranged along the diameter direction of the central ring body 12. At least one expansion structure 123 is installed in the central ring body 12.

[0035] Reference Fig.11 and Fig.12 The dual-axis hydraulic cylinder 1233 is installed on the top of the inner cavity of the central ring body 12 through a fixing frame 1234; the fixing frame 1234 includes a support plate 12341, a support leg 12342 and a support foot 12343, the support plate 12341 is placed on the lower surface of the dual-axis hydraulic cylinder 1233 and is fixedly connected to the dual-axis hydraulic cylinder 1233 by bolts; the upper end of the support leg 12342 is fixedly installed on the lower surface of the support plate 12341 (for example, by an integrated fixed connection or by a bolt fixed connection); the support foot 12343 is fixedly installed on the lower end of the support leg 12342 (for example, by an integrated fixed connection or by a bolt fixed connection). The support foot 12343 is pressed on the upper surface of the inner extension ring body 122 and is detachably connected to the inner extension ring body 122 by bolts.

[0036] Reference Fig.13The friction-reducing wheel 1232 is horizontally placed; a rotating shaft is inserted in the middle of the friction-reducing wheel 1232, and the rotating shaft is connected to the inner wall of the friction-reducing wheel 1232 through a cylindrical roller bearing; the rotating shaft is vertically placed; and both ends of the rotating shaft are fixedly connected to the push rod 1231 (for example, by shrink connection, by thread connection, etc.). The friction-reducing wheel 1232 can rotate around the rotating shaft, thereby reducing the friction with the inner wall of the convex ring part 311 when the central ring body 12 rotates, ensuring the smoothness of the rotation while avoiding scratching the inner wall of the convex ring part 311, thereby improving product quality.

[0037] Reference Fig.14 The plug-in hole 124 is located above the gap between adjacent countersunk holes 1221 , so that the expansion structure 123 and the countersunk holes 1221 can give way, thereby facilitating the insertion of a screwdriver into the countersunk holes 1221 to load and unload the center ring body 12 .

[0038] A processing method for pressing and forming an impeller cone disk, using an impeller cone disk pressing and forming device to press a blank ring 3, the steps comprising: S1. Use a hydraulic press to drive the upper mold assembly 2 upward to open the mold.

[0039] S2, clamp the inner edge of the flat blank ring 3 into the positioning slot 121 of the center ring body 12, so that the blank ring 3 is placed horizontally at the top position of the center ring body 12 (refer to Figure 3 ).

[0040] S3. Use a hydraulic press to drive the upper die assembly 2 downward to close the die. During the process, the upper molding surface 21 is pressed against the third movable ring body 15, the second movable ring body 14 and the first movable ring body 13 in turn, and the blank ring 3 is pressed into an impeller cone 31, and the convex ring portion 311 of the impeller cone 31 is sleeved and fitted on the side wall of the center ring body 12. The upper molding surface 21 is first pressed against the third movable ring body 15, thereby pressing the edge of the blank ring 3. After that, the pressed edge of the blank ring 3 gradually moves downward, causing the second movable ring body 14 and the first movable ring body 13 to move upward in turn, thereby achieving step-by-step deep drawing plasticity of the blank ring 3 to avoid wrinkles on the blank ring 3 during the pressing process, thereby improving product quality (refer to Figure 5 and Figure 6 The inner diameter of the blank ring 3 subjected to the drawing force increases, so that it is pulled out from the positioning slot 121 and finally fits on the side wall of the center ring body 12 close to the first movable ring body 13 (refer to Figure 3 and Figure 6 ).

[0041] S4, the linear drive 25 drives the buckle ring 24 upward, so that the upper surface of the abutting ring 231 is separated from the adapting conical surface 2411 and a clearance gap is formed; the clearance gap is located at the outer wall of the convex ring portion 311, and the clearance gap is used to provide an accommodation space for the extension of the anti-friction wheel 1232 and the bending of the convex ring portion 311 (refer to Figure 7).

[0042] S5. The dual-axis hydraulic cylinder 1233 pushes the friction-reducing wheel 1232 out of the insertion hole 124, so that the friction-reducing wheel 1232 is pressed against the inner side wall of the convex ring portion 311, and the friction-reducing wheel 1232 can push the side wall of the convex ring portion 311 at the pressing position to bend outward (refer to Fig.11 ).

[0043] S6, the central ring body 12 rotates, driving the expansion structure 123 to rotate synchronously, and the friction-reducing wheel 1232 rolls along the inner wall of the convex ring portion 311 and pushes the side wall of the convex ring portion 311 at the crimping position to bend outward; wherein the central ring body 12 rotates at least 360 degrees, so that all side walls within the circumference of the convex ring portion 311 are subjected to a bending force pushed outward (refer to Fig.10 ) to achieve uniform plasticity and ensure that the roundness of the convex ring portion 311 is within the required range.

[0044] S7. The dual-axis hydraulic cylinder 1233 pulls the friction-reducing wheel 1232 back into the insertion hole 124 to avoid the reduction of product roundness caused by the friction-reducing wheel 1232 accidentally squeezing the impeller cone 31 during discharging.

[0045] S8. Use a hydraulic press to drive the upper mold assembly 2 upward to open the mold. During the process, the convex ring portion 311 rebounds inward and the nitrogen spring 16 stretches and resets, so that the convex ring portion 311 is pulled out of the abutment ring 231, and the impeller cone 31 falls and is crimped onto the upper surface of the third movable ring body 15.

[0046] S9. The user inserts several fingers into the hole in the middle of the impeller cone disk 31 and presses them against the inner wall of the impeller cone disk 31, and the remaining fingers are pressed against the outer wall of the impeller cone disk 31. The robotic arm inserts the retracted finger clamp into the hole in the middle of the impeller cone disk 31 and then opens it, thereby realizing convenient grasping of the impeller cone disk 31, and then lifts and removes the impeller cone disk 31 to complete the unloading.

[0047] The linear drive 25 is an electric push rod, a pneumatic push rod, a hydraulic push rod or a combination thereof (eg an electro-hydraulic push rod).

[0048] The present invention further comprises an electrical cabinet, which is fixedly mounted on the surface of the hydraulic press workbench by bolts. The linear drive 25, the dual-axis hydraulic cylinder 1233 and the drive motor 18 are respectively connected to the electrical cabinet through wires and signal lines; the electrical cabinet is respectively connected to the external power supply and the external computer through wires and signal lines, and the computer controls the start and stop of the linear drive 25, the dual-axis hydraulic cylinder 1233 and the drive motor 18 in the present invention through the electrical cabinet.

[0049] Reference Figure 2 and Fig.12The inner cavity of the lower die base 11 is used for wiring (including the wiring of the conductors, signal lines and the oil pipes of the double-cavity hydraulic cylinder), and the double-cavity hydraulic cylinder is connected and communicated with the external hydraulic pump through the oil pipe; refer to Figure 1 and Fig.12 The inner cavity of the upper mold assembly 2 is used for wiring (including the layout of wires, signal lines and oil pipes of the hydraulic push rod).

[0050] Reference Fig.10 A second bearing 1701 is provided between the outer wall of the center ring body 12 and the lower die seat 11, and the second bearing 1701 is provided above the first bearing 17, thereby reducing the friction between the center ring body 12 and the lower die seat 11 during the rotation process and improving the smoothness.

[0051] The present invention has a simple structure and reliable functions. The fixed central ring body 12 is used to press and form the convex ring portion 311 of the impeller cone 31. The first movable ring body 13, the second movable ring body 14, and the third movable ring body 15 that can move longitudinally are used to press and form the disk body 312 of the impeller cone 31 in stages, thereby avoiding the problem of wrinkles during the pressing process of the impeller cone 31. A positioning groove 121 is provided at the outer edge of the top surface of the central ring body 12. The positioning groove 121 can be adapted to snap into the inner edge of the blank ring 3, so that the flat blank ring 3 is stably placed horizontally at the top end of the central ring body 12, realizing convenient loading and positioning. The buckle ring 24 can be separated from the adapting conical surface 2411 upward and form a clearance gap, which is used to provide an accommodating space for the extension of the anti-friction wheel 1232 and the bending of the convex ring portion 311; when the anti-friction wheel 1232 extends outward, the convex ring portion 311 can be excessively bent. After the anti-friction wheel 1232 is removed, the convex ring portion 311 can rebound to present a cylindrical shape with a constant diameter rather than a truncated cone shape with a gradually decreasing diameter, so as to meet the processing and subsequent use requirements.

[0052] By controlling the extension amount of the anti-friction wheel 1232 , the rebound amount can be controlled to obtain a cylindrical convex ring portion 311 with a constant diameter, thereby meeting the processing and subsequent use requirements.

[0053] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0054] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] To sum up, for those skilled in the art, according to the guidance of the present invention, without departing from the principles and spirit of the present invention, the changes, modifications, substitutions and deformations made to the present invention still fall within the protection scope of the present invention.

Claims

1. An impeller cone disc pressing and forming device, characterized in that: It comprises a lower mold assembly (1) and an upper mold assembly (2) placed directly above the lower mold assembly (1); The lower die assembly (1) comprises a lower die base (11), a center ring body (12), a first movable ring body (13), a second movable ring body (14), and a third movable ring body (15); the center ring body (12) is vertically arranged and mounted at the center position of the upper surface of the lower die base (11); the first movable ring body (13) is sleeved on the outer wall position of the center ring body (12), the second movable ring body (14) is sleeved on the outer wall position of the first movable ring body (13), and the third movable ring body (15) is sleeved on the outer wall position of the second movable ring body (14); the first movable ring body (13), the second movable ring body (14), and the third movable ring body (15) are respectively connected to the lower die base (11) via nitrogen springs (16); A positioning slot (121) is provided at the outer edge of the top surface of the central ring body (12); The upper mold assembly (2) is provided with an upper molding surface (21); the top end of the first movable ring body (13), the top end of the second movable ring body (14), and the top end of the third movable ring body (15) are respectively provided with lower molding surfaces adapted to the upper molding surface (21).

2. The impeller cone disc pressing and forming device according to claim 1 is characterized in that: The upper molding surface (21) is in the shape of an upwardly concave cone disk.

3. The impeller cone disc pressing and forming device according to claim 2 is characterized in that: The upper mold assembly (2) is provided with a center ring body accommodating groove (22); the center ring body accommodating groove (22) is located at the center of the upper molding surface (21) and is adapted to the top end of the center ring body (12).

4. The impeller cone disc pressing and forming device according to claim 3 is characterized in that: In a non-pressurized state, the first movable ring body (13), the second movable ring body (14) and the third movable ring body (15) are located at the same height.

5. The impeller cone disc pressing and forming device according to claim 4 is characterized in that: The upper surface of the lower die base (11) is provided with a central accommodating groove (112) and a supporting annular surface (113); the supporting annular surface (113) is stepped so as to respectively support the first movable ring body (13), the second movable ring body (14) and the third movable ring body (15) through a nitrogen spring (16).

6. The impeller cone disc pressing and forming device according to claim 5 is characterized in that: The central accommodating groove (112) is disposed at the center of the supporting annular surface (113).

7. The impeller cone disc pressing and forming device according to claim 6 is characterized in that: The central ring body (12) is capable of rotating along its own axis; and an expansion structure (123) is provided on the top of the central ring body (12).

8. The impeller cone disc pressing and forming device according to claim 7 is characterized in that: The upper mold assembly (2) is provided with a travel cavity (23), and a contact ring (231) with a cross-section in the shape of an equilateral triangle is provided at the bottom end of the side wall of the travel cavity (23); a buckling ring (24) capable of longitudinal movement is provided in the travel cavity (23), and a lower extension ring body (241) is provided at the outer edge position of the lower surface of the buckling ring (24), and a matching conical surface (2411) matching the upper surface of the contact ring (231) is provided on the lower surface of the buckling ring (24); the central ring body accommodating groove (22) is located at the lower surface of the buckling ring (24).

9. The impeller cone disc pressing and forming device according to claim 8, characterized in that: The expansion structure (123) comprises a push rod (1231), a friction-reducing wheel (1232) and a double-axis hydraulic cylinder (1233); two ends of the push rod (1231) are respectively connected to the friction-reducing wheel (1232) and the double-axis hydraulic cylinder (1233), and the friction-reducing wheel (1232) is placed horizontally; the double-axis hydraulic cylinder (1233) can drive the friction-reducing wheel (1232) to extend or retract from the plug-in hole (124) at the top of the side wall of the central ring body (12); the friction-reducing wheel (1232) is placed horizontally; the push rod (1231) is provided with two and is respectively connected to the two output shafts of the double-axis hydraulic cylinder (1233), and the friction-reducing wheel (1232) is provided with two and is respectively placed in the two plug-in holes (124).

10. A method for pressing and forming an impeller cone, characterized in that: The impeller cone disk pressing and forming device according to claim 9 is used to press the blank ring (3), and the steps include: S1, mold opening; S2, clamping the inner edge of the flat blank ring (3) into the positioning groove (121) of the central ring body (12); S3, using a hydraulic press to drive the upper mold assembly (2) downward to close the mold, during which the upper molding surface (21) is sequentially crimped with the third movable ring body (15), the second movable ring body (14) and the first movable ring body (13), so that the blank ring (3) is pressed and formed into an impeller cone disk (31), and the convex ring portion (311) of the impeller cone disk (31) is sleeved and fitted on the side wall of the center ring body (12); S4, the buckle ring (24) moves upward, so that the upper surface of the abutment ring (231) is separated from the adapting conical surface (2411) and a clearance gap is formed; the clearance gap is located at the outer side wall of the convex ring portion (311); S5, the dual-axis hydraulic cylinder (1233) pushes the anti-friction wheel (1232) to extend out of the insertion hole (124), so that the anti-friction wheel (1232) is pressed against the inner side wall of the convex ring portion (311), and the anti-friction wheel (1232) can push the side wall of the convex ring portion (311) at the pressed position to bend outward; S6, the central ring body (12) rotates, driving the expansion structure (123) to rotate synchronously, and the friction-reducing wheel (1232) rolls along the inner wall of the convex ring portion (311) and pushes the side wall of the convex ring portion (311) at the crimping position to bend outwards; S7, the dual-axis hydraulic cylinder (1233) pulls the friction-reducing wheel (1232) back into the plug-in hole (124); S8. Use a hydraulic press to drive the upper mold assembly (2) upward to open the mold. During the process, the convex ring portion (311) rebounds inward and the nitrogen spring (16) stretches and resets, so that the convex ring portion (311) is pulled out of the abutment ring (231), and the impeller cone (31) falls and is pressed against the upper surface of the third movable ring body (15).

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