Method for manufacturing an exhaust end cone part

Abstract

The manufacturing method of the wax injection machine mold of the present invention includes two core shaft deflection feeding belts arranged at 90 degrees; the two core shaft deflection feeding belts are respectively placed with a forming male core shaft and a forming female core shaft; a core shaft pairing station is arranged at the converging output end of the two core shaft deflection feeding belts, and the forming male core shaft and the forming female core shaft are converged and paired at the core shaft pairing station into an integrated core shaft mold; the input end of a core shaft output conveyor belt is arranged at the output end of the core shaft pairing station to convey the core shaft mold; a core shaft pulling U-shaped fork head controlled by a manipulator is arranged at the core shaft pairing station; the core shaft pulling U-shaped fork head is inserted on a forming male pulling flexible shaft and pulls the forming male rear clamping plate outwards and assists in fixing; the design of the present invention is reasonable, the structure is compact and it is convenient to use.

Description

Technical Field

[0001] The present invention relates to a wax injection machine die assembly, device and manufacturing method. Background Art

[0002] In long-term work practice, in the past, the rear end of the exhaust manifold of a supercharged engine was directly connected to a straight-tube type three-way catalytic device, which had poor high-temperature resistance, was not conducive to the overall layout of the engine vehicle, and brought many troubles to the layout of the chassis system, making it inconvenient for workers to operate and use and shortening the service life. For example, CN201620476627.9 is a novel air purification device for the supercharged exhaust end of an automobile. The core shaft directly reflects the internal structural shape of the casting, and its quality directly affects the internal structure of the casting and the generation of casting defects. Although the existing core shaft uses a shell core machine to make the core, due to the relatively large and bulky inner cavity mechanism of the exhaust end cone, when using the shell mold machine to make the core, either the core shaft strength is affected due to the thin shell thickness, or the shell thickness is thick and inconsistent, resulting in a large amount of gas evolution from the core shaft, causing pore-like defects in the casting and increasing the amount of sand used, thereby increasing the cost of the core shaft. Due to the large and bulky inner cavity core shaft of such an exhaust end cone, in the traditional shell core machine core-making process, the shell thickness of the core shaft is uneven, resulting in low strength of the core shaft due to the thin shell thickness and large gas evolution of the core shaft due to the thick shell thickness, causing casting defects and increasing the amount of sand used. Therefore, to solve the problem of uneven shell formation of the core shaft during the core shaft manufacturing process, which leads to the generation of casting defects, it is necessary to solve the problems of the uniformity of the shell thickness and the strength of the core shaft.

[0003] Currently, the Chinese patent with the publication number CN205033459U on the market discloses a wax injection machine, which includes a frame. A wax filling oil cylinder is installed on the right side of the frame; a workbench surface is provided at the top of the frame, a wax injection oil cylinder is installed at the rear end of the right side of the workbench surface, and a wax storage barrel is installed on the left side of the wax injection oil cylinder; a wax injection mechanism is installed at the front end of the right side of the workbench surface, and the wax injection oil cylinder is drivingly connected to the wax injection mechanism; an electric control box is installed above the wax injection mechanism; a mold and a fixed template are provided at the front end of the left side of the workbench surface, and the fixed template is located above the mold; a template working oil cylinder is fixedly installed on the upper end surface of the fixed template, and a working template is provided below the fixed template. The working template is in an X shape, and the working oil cylinder is drivingly connected to the working template; the working template is located above the mold.

[0004] Although this wax injection machine has an expanded working vision, is convenient to operate, and is safer, before each injection operation, the operator needs to bend down to place the mold under the fixed template, and after the injection operation of the wax injection machine is completed, the operator also needs to bend down to remove the mold from under the fixed template. Repeated operations are likely to cause safety accidents. Investment casting, also known as lost-wax casting, includes processes such as wax pressing, wax trimming, tree assembly, slurry dipping, wax melting, metal liquid casting, and post-treatment. Lost-wax casting uses wax to make a wax mold of the part to be cast, and then a slurry is applied to the wax mold, which is the clay mold. After the clay mold dries, it is baked into a ceramic mold. Once baked, the wax mold completely melts and runs off, leaving only the ceramic mold. Generally, a pouring gate is left when making the clay mold, and then molten metal is poured into the pouring gate. After cooling, the required part is made. Therefore, the production of the wax mold is an important process, which is completed by a wax injection machine. The formation of the wax mold is greatly affected by the wax injection machine. At present, the stability of most wax injection machines is insufficient, so the wax molds made by them often have defects. Summary of the Invention

[0005] Generally speaking, the technical problem to be solved by the present invention is to provide a wax injection machine mold device and method. The wax injection machine mold device and method of the parent case, application number CN202011315114.7, application date November 20, 2020.

[0006] To solve the above problems, the technical solutions adopted by the present invention are as follows:

[0007] An exhaust end cone, including an exhaust end cone member; the exhaust end cone member is a cavity structure, having a curved main body, and connection port parts at both ends of the curved main body;

[0008] The exhaust end cone member is supported by a casting process, and it includes a forming die assembly.

[0009] A mold for an exhaust end cone, which includes a forming die assembly for casting the exhaust end cone;

[0010] The forming die assembly includes a forming lower die, a forming core shaft assembly, and a forming upper die;

[0011] The forming core shaft assembly includes a forming male core shaft and a forming female core shaft that are detachably connected at the ends;

[0012] The forming male core shaft and the forming female core shaft are respectively inserted into the two ends of the curved inner cavity of the exhaust end cone member and connected into an integrated core shaft mold;

[0013] A forming male positioning shoulder is provided at the outer end of the forming male core shaft. The forming male core shaft has a hollow forming male fitting core shaft sleeve, and the end of the forming male fitting core shaft sleeve is connected to the forming male positioning shoulder;

[0014] At the center of the end of the forming male adapter mandrel sleeve, a forming male positioning plug that vertically exposes the forming radial center channel is provided. A forming male orientation key is provided on the forming male positioning plug. A forming radial channel with a long groove-shaped cross-section is connected to the forming radial center channel and the forming male adapter mandrel sleeve. A forming male front clamping baffle is axially movable in the forming radial channel. A forming male pulling flexible shaft is connected to the rear end of the forming male front clamping baffle. The forming male pulling flexible shaft passes through the inner cavity of the forming male adapter mandrel sleeve and then exposes. A forming male rear clamping plate is provided at the exposed end of the forming male pulling flexible shaft. A limiting baffle for preventing the forming male front clamping baffle from being pulled out is provided at the rear end of the forming radial center channel. A fastener is provided on the forming male pulling flexible shaft;

[0015] A forming female positioning shoulder is provided at the outer end of the forming female mandrel. The forming female mandrel has a hollow forming female adapter mandrel sleeve, and the end of the forming female adapter mandrel sleeve is connected to the forming female positioning shoulder;

[0016] Two forming female partitions are provided in the inner cavity of the forming female adapter mandrel sleeve. A forming female wax liquid passage cavity is formed between the two forming female partitions in the inner cavity of the forming female adapter mandrel sleeve. Forming female output channels are distributed on the side wall of the forming female adapter mandrel sleeve. A forming female wax liquid channel is installed on one forming female partition;

[0017] The forming female wax liquid channel is connected to the wax injection pipeline of the wax injection machine. The wax liquid is transported from the forming female wax liquid channel through the forming female wax liquid passage cavity and then from the forming female output channel to the wax forming cavity;

[0018] A forming female front cavity is formed between the other forming female partition in the inner cavity of the forming female adapter mandrel sleeve and the end opening of the forming female adapter mandrel sleeve. Forming end channels and forming end orientation key grooves are alternately provided at the end opening of the forming female adapter mandrel sleeve;

[0019] When the forming female mandrel and the forming male mandrel are aligned, the forming male orientation key and the forming end orientation key groove are adapted, shaped and connected into one body. Push the forming male pulling flexible shaft inward so that the forming radial channel and the forming end channel are aligned and connected. The forming male front clamping baffle passes through the forming radial channel and the forming end channel and then exposes in the forming female front cavity. After pushing the forming male pulling flexible shaft inward and rotating it 90 degrees, pull the forming male pulling flexible shaft outward and clamp it with the forming male rear clamping plate on the outer end face of the forming male positioning shoulder, so that the forming male front clamping baffle is in pressure contact with the inner end of the forming female front cavity;

[0020] On the forming lower die, there is a forming adaptation lower cavity channel adapted to the lower part of the exhaust end cone part when placed sideways; on the forming lower die, there are respectively a forming male lower inner cavity and a forming female lower inner cavity; the forming male lower inner cavity and the forming female lower inner cavity are respectively connected to the corresponding end parts of the forming adaptation lower cavity channel; the forming male lower inner cavity is used to accommodate the lower part of the forming male positioning shoulder; the forming female lower inner cavity is used to accommodate the lower part of the forming female positioning shoulder; on the forming lower die, there are distributed forming positioning stop mouths, and on the forming positioning stop mouths, there are coaxially arranged forming threaded holes;

[0021] On the lower end face of the forming upper die, there is a forming adaptation upper cavity channel. At both ends of the forming adaptation upper cavity channel, there are respectively arranged forming upper corresponding inner cavities. On the forming upper die, there are coaxially arranged a forming mating positioning head and a forming connecting bolt;

[0022] The forming adaptation upper cavity channel and the forming adaptation lower cavity channel are in alignment to enclose the wax cavity on the outer wall of the exhaust end cone part. The forming male lower inner cavity and the forming female lower inner cavity are respectively in alignment with the corresponding forming upper corresponding inner cavities to enclose the corresponding forming male positioning shoulder and forming female positioning shoulder;

[0023] The forming mating positioning head is inserted into the forming positioning stop mouth, and the forming connecting bolt is connected to the forming threaded hole;

[0024] The forming upper die has an exhaust valve.

[0025] A wax injection machine device includes a forming die assembly; the wax injection machine prepares a wax mold part of the exhaust end cone part through the forming die assembly;

[0026] A wax injection machine device includes two core shaft deflecting feeding belts arranged at 90 degrees; the two core shaft deflecting feeding belts respectively place a forming male core shaft and a forming female core shaft;

[0027] At the converging output end of the two core shaft deflecting feeding belts, there is a core shaft pairing station. The forming male core shaft and the forming female core shaft are converged and paired at the core shaft pairing station into an integrated core shaft mold; at the output end of the core shaft pairing station, there is an input end of a core shaft output conveyor belt to convey the core shaft mold;

[0028] At the core shaft pairing station, there is a core shaft pulling U-shaped fork head controlled by a manipulator; the core shaft pulling U-shaped fork head is inserted on the forming male pulling flexible shaft and externally pulls the forming male rear clamping plate and assists in fixing.

[0029] A wax injection machine device includes a process preparation production line;

[0030] The process preparation production line includes a process conveyor belt; on the process conveyor belt, there are successively distributed a lower die loading station, a core shaft loading station, an upper cover loading station, a fixing station, a connecting station, a fastening tapping machine, a wax injection station, a taking-out station, and / or a tree assembling station;

[0031] A manipulator is provided at the lower die loading station to place the formed lower die on the process conveyor belt;

[0032] At the mandrel loading station, a manipulator is provided to pair the mandrel die with the formed lower die;

[0033] At the upper cover loading station, an upper cover conveying device is provided to cover the assembled mandrel die on the formed lower die on the process conveyor belt, and the forming mating positioning head is inserted into the forming positioning stop opening; the upper cover conveying device includes a horizontally arranged upper cover conveyor belt, an upper cover falling station is provided at the output end of the upper cover conveyor belt, an upper cover pressing head is provided above the upper cover falling station, an upper cover swing opening and closing plate is arranged in a butting manner on the bearing surface of the upper cover falling station, and an upper cover side guiding and limiting plate for downward guiding is provided below the upper cover falling station; the upper cover pressing head is provided with a suction nozzle or an electromagnet; at the fixing station, a pressing head is provided above the process conveyor belt to press the formed upper die and the formed lower die into one body; an upper jacking head is provided below the process conveyor belt to lift the process conveyor belt upward;

[0034] At the connecting station, a manipulator and / or a fastening tapping machine are provided. The manipulator places the formed connecting bolt on the formed upper die, and the fastening tapping machine connects the formed connecting bolt with the formed threaded hole;

[0035] At the wax injection station, a wax injection machine is provided to inject liquid wax into the wax cavity of the formed mold assembly to form a wax mold;

[0036] At the taking-out station, a manipulator is provided to open the cooled formed mold assembly and take out the wax mold;

[0037] At the tree assembling station, the wax molds are assembled into a tree. Adjacent wax molds in each layer are connected by an intermediate transition connecting sleeve to form an annular part, and intermediate through holes are distributed on the intermediate transition connecting sleeve for the slurry dipping process.

[0038] A wax injection machine device includes an intermediate transition connecting sleeve and an intermediate connecting center frame provided at the tree assembling station;

[0039] The intermediate connecting center frame is connected with the intermediate transition connecting sleeve through a cross bar;

[0040] At the tree assembling station, the wax molds are assembled into a tree. Adjacent wax molds in each layer are connected by an intermediate transition connecting sleeve to form an annular part, and intermediate through holes are distributed on the intermediate transition connecting sleeve for the slurry dipping process;

[0041] An intermediate frame tail cone with an inner conical hole is provided on the top of the intermediate connecting center frame, and an intermediate frame side groove communicating with the inner conical hole is axially arranged on the side wall of the intermediate frame tail cone;

[0042] Above the tail cone of the middle frame, there is a manipulator arm controlled by a manipulator. Below the manipulator arm, there is a manipulator outer taper to fit with the inner taper hole.

[0043] On the manipulator outer taper, there is a manipulator through-hole.

[0044] At the lower end of the manipulator outer taper, there is a manipulator L-hook. Inside the tail cone of the middle frame, there is an inner cavity baffle of the middle frame. The manipulator L-hook rotates to hook with the inner cavity baffle of the middle frame. At the same time, the manipulator through-hole corresponds to the side groove of the middle frame. On the manipulator arm, there is a manipulator fixed traction radial rod. On the manipulator fixed traction radial rod, there is a manipulator inserted wedge to be inserted into the manipulator through-hole and the side groove of the middle frame.

[0045] A method for manufacturing an exhaust end cone part through a forming die assembly; the method includes;

[0046] First, a forming male mandrel and a forming female mandrel are respectively inserted from both ends of the bending inner cavity of the exhaust end cone part and connected into an integrated mandrel die. Then, the mandrel die is placed on the forming lower die. Secondly, after the forming upper die is positioned and buckled, it is fixed through forming connection bolts. Thirdly, wax injection, shaping, mold removal, tree building and slurry dipping are performed in sequence.

[0047] As a further improvement of the above technical solution:

[0048] With the help of a process conveyor belt; first, at the lower die loading station, the manipulator places the forming lower die on the process conveyor belt. Then, at the mandrel loading station, the manipulator assembles the mandrel die on the forming lower die. Secondly, at the upper cover dropping station, the upper cover pressing head presses down the forming upper die to open the upper cover swing opening and closing plate, and installs the forming upper die on the forming lower die at the upper cover loading station. Thirdly, at the fixing station, the pressing head presses the forming upper die and the forming lower die into one body. At the same time, the upper lifting head lifts the process conveyor belt upward. Subsequently, at the connecting station, the manipulator places the forming connection bolts on the forming upper die, and the fastening tapping machine connects the forming connection bolts with the forming threaded holes. Then, at the wax injection station, the wax injection machine passes the wax liquid through the forming female wax liquid channel and the forming female wax liquid cavity through the wax injection pipeline, and the wax liquid is transported from the forming female output channel to the wax forming cavity. Next, at the removal station, the cooled forming die assembly is opened and the wax mold part is taken out. Then, at the tree building station, the wax mold parts are tree built, and adjacent wax mold parts on each layer are connected through an intermediate transition connecting sleeve to form a ring-shaped part.

[0049] In a mandrel die where a forming male mandrel and a forming female mandrel are respectively inserted from both ends of the bending inner cavity of the exhaust end cone part and connected into one body, first, the forming female mandrel and the forming male mandrel are aligned; then, the forming male orientation key and the forming end orientation key groove are adapted and fixed in shape and connected into one body; secondly, the inner pushing forming male pulling soft shaft is used to align and connect the forming radial channel and the forming end channel; thirdly, the front clamping baffle of the forming male passes through the forming radial channel and the forming end channel and then exposes in the front cavity of the forming female. After the inner pushing forming male pulling soft shaft rotates 90 degrees, the inner pushing forming male pulling soft shaft is pulled outwards, and is clamped by the rear clamping plate of the forming male on the outer end face of the positioning shoulder of the forming male, so that the front clamping baffle of the forming male is in pressure contact with the inner end part in the front cavity of the forming female.

[0050] In the mandrel assembly process, first, the forming male mandrel and the forming female mandrel are sent to the mandrel pairing station through their respective mandrel direction-changing feeding belts; thirdly, at the mandrel pairing station, the mandrel output conveyor belt conveys the mandrel die to the forming lower die at the mandrel loading station.

[0051] In the tree assembly process, first, at the tree assembly station, the wax mold parts are assembled into a ring through an intermediate transition connecting sleeve and installed on the intermediate connecting center frame; secondly, the hook of the manipulator L rotates to hook with the inner cavity baffle of the intermediate frame. At the same time, the through hole of the manipulator corresponds to the side groove of the intermediate frame; thirdly, the manipulator inserts the inclined wedge, and makes the manipulator insert the inclined wedge into the through hole of the manipulator and the side groove of the intermediate frame.

[0052] The design of the present invention is reasonable, low in cost, strong and durable, safe and reliable, simple to operate, time-saving and labor-saving, cost-saving, compact in structure and convenient to use. Description of the Drawings

[0053] Figure 1 It is a schematic structural diagram of the exhaust cone end and the die use of the present invention.

[0054] Figure 2 It is a schematic exploded structural diagram of the die of the present invention.

[0055] Figure 3 It is a schematic internal structural diagram of the die of the present invention.

[0056] Figure 4 It is a schematic partial structural diagram of the die of the present invention.

[0057] Figure 5 It is a schematic structural diagram of the mandrel assembly loading use of the present invention.

[0058] Figure 6 It is a schematic injection wax structural diagram of the present invention.

[0059] Figure 7 It is a schematic process flow structural diagram of the present invention.

[0060] Figure 8 It is a schematic diagram of the local structure of the present invention.

[0061] Figure 9 It is a schematic diagram of the structure of the group tree used in the present invention.

[0062] Wherein: 1. Exhaust end cone part; 2. Forming die assembly; 3. Forming lower die; 4. Forming adapter lower cavity; 5. Forming male lower inner cavity; 6. Forming female lower inner cavity; 7. Forming threaded hole; 8. Forming positioning stop; 9. Forming upper die; 10. Forming adapter upper cavity; 11. Forming upper corresponding inner cavity; 12. Forming mating positioning head; 13. Forming connecting bolt; 14. Forming male mandrel; 15. Forming male positioning shaft shoulder; 16. Forming female mandrel; 17. Forming female positioning shaft shoulder; 18. Forming male adapter mandrel sleeve; 19. Forming female adapter mandrel sleeve; 20. Forming male positioning plug; 21. Forming male orientation key; 22. Forming male pulling flexible shaft; 23. Forming male rear clamping plate; 24. Forming male front clamping baffle; 25. Forming radial channel; 26. Forming radial center channel; 27. Forming female partition; 28. Forming female front cavity; 29. Forming female wax through-flow cavity; 30. Forming female wax liquid channel; 31. Forming female output channel; 32. Forming end channel; 33. Forming end orientation keyway; 34. Mandrel deflection feeding belt; 35. Mandrel pairing station; 36. Mandrel output conveyor belt; 37. Mandrel pulling U-shaped fork head; 38. Process preparation production line; 39. Upper cover feeding conveyor; 40. Process conveyor belt; 41. Lower die loading station; 42. Mandrel loading station; 43. Upper cover loading station; 44. Fixing station; 45. Connecting station; 46. Upper cover feeding conveyor belt; 47. Upper cover falling station; 48. Upper cover lower swing opening and closing plate; 49. Upper cover side guiding and limiting plate; 50. Upper cover pressing head; 51. Tightening tapping machine; 52. Wax injection station; 53. Taking-out station; 54. Group tree station; 55. Wax mold part; 56. Intermediate transition connecting sleeve; 57. Intermediate through hole; 58. Intermediate connecting center frame; 59. Tail cone of intermediate frame; 60. Side groove of intermediate frame; 61. Inner cavity baffle of intermediate frame; 62. Manipulator arm; 63. Outer taper of manipulator; 64. Manipulator L hook; 65. Manipulator through hole; 66. Manipulator fixed pulling radial rod; 67. Manipulator inserted wedge. Detailed implementation manners

[0063] As Figures 1-4 shown, the exhaust end cone of this embodiment includes an exhaust end cone part 1; the exhaust end cone part 1 is a cavity structure with a curved main body and connecting port parts at both ends of the curved main body;

[0064] The exhaust end cone part 1 is supported by a casting process and includes a forming die assembly 2.

[0065] The die for the exhaust end cone of this embodiment includes a forming die assembly 2 for casting the exhaust end cone;

[0066] The forming die assembly 2 includes a forming lower die 3, a forming mandrel assembly, and a forming upper die 9;

[0067] The forming mandrel assembly includes a forming male mandrel 14 and a forming female mandrel 16 that are detachably connected at the ends;

[0068] The forming male mandrel 14 and the forming female mandrel 16 are respectively inserted into both ends of the bending inner cavity of the exhaust end cone part 1 and connected into an integral mandrel die;

[0069] A forming male positioning shoulder 15 is provided at the outer end of the forming male mandrel 14. The forming male mandrel 14 has a hollow forming male fitting mandrel sleeve 18, and the end of the forming male fitting mandrel sleeve 18 is connected to the forming male positioning shoulder 15;

[0070] At the center of the end of the forming male fitting mandrel sleeve 18, a forming male positioning plug 20 perpendicular to the surface and exposing the forming radial center channel 26 is provided. A forming male orientation key 21 is provided on the forming male positioning plug 20. A forming radial channel 25 with a long groove-shaped cross-section is communicated with the forming radial center channel 26 and the forming male fitting mandrel sleeve 18. A forming male front clamping baffle 24 is axially movable in the forming radial channel 25. A forming male pulling flexible shaft 22 is connected to the rear end of the forming male front clamping baffle 24. The forming male pulling flexible shaft 22 passes through the inner cavity of the forming male fitting mandrel sleeve 18 and then exposes. A forming male rear clamping plate 23 is provided at the exposed end of the forming male pulling flexible shaft 22; A limiting baffle for preventing the forming male front clamping baffle 24 from being pulled out is provided at the rear end of the forming radial center channel 26; A fastening member is provided on the forming male pulling flexible shaft 22;

[0071] A forming female positioning shoulder 17 is provided at the outer end of the forming female mandrel 16. The forming female mandrel 16 has a hollow forming female fitting mandrel sleeve 19, and the end of the forming female fitting mandrel sleeve 19 is connected to the forming female positioning shoulder 17;

[0072] Two forming female partitions 27 are provided in the inner cavity of the forming female fitting mandrel sleeve 19. A forming female wax liquid through cavity 29 is formed between the two forming female partitions 27 in the inner cavity of the forming female fitting mandrel sleeve 19; Forming female output channels 31 are distributed on the side wall of the forming female fitting mandrel sleeve 19. A forming female wax liquid channel 30 is installed on one forming female partition 27;

[0073] The forming female wax liquid channel 30 is connected to the wax injection pipeline of the wax injection machine, and the wax liquid is transported from the forming female wax liquid channel 30, through the forming female wax liquid through cavity 29, and then from the forming female output channel 31 to the wax forming cavity;

[0074] There is a forming mother front cavity 28 between another forming mother partition plate 27 in the inner cavity of the forming mother adapter mandrel sleeve 19 and the end port of the forming mother adapter mandrel sleeve 19; Forming end channels 32 and forming end keyways 33 are staggeredly arranged at the end port of the forming mother adapter mandrel sleeve 19;

[0075] When the forming mother mandrel 16 is aligned with the forming male mandrel 14, the forming male orientation key 21 is fitted and fixed with the forming end keyway 33 and connected as a whole; Push the forming male pulling flexible shaft 22 inward, so that the forming radial channel 25 is aligned and communicated with the forming end channel 32; The forming male front clamping plate 24 is exposed in the forming mother front cavity 28 after passing through the forming radial channel 25 and the forming end channel 32. After pushing the forming male pulling flexible shaft 22 inward and rotating it 90 degrees, pull the forming male pulling flexible shaft 22 outward, and clamp it on the outer end face of the forming male positioning shoulder 15 through the forming male rear clamping plate 23, so that the forming male front clamping plate 24 is in pressure contact with the inner end part of the forming mother front cavity 28;

[0076] A forming adapter lower cavity 4 adapted to the lower part of the exhaust end cone part 1 when placed sideways is arranged on the forming lower die 3; A forming male lower inner cavity 5 and a forming mother lower inner cavity 6 are respectively arranged on the forming lower die 3; The forming male lower inner cavity 5 and the forming mother lower inner cavity 6 are respectively connected to the corresponding end parts of the forming adapter lower cavity 4; The forming male lower inner cavity 5 is used to accommodate the lower part of the forming male positioning shoulder 15; The forming mother lower inner cavity 6 is used to accommodate the lower part of the forming mother positioning shoulder 17; Forming positioning stop mouths 8 are distributed on the forming lower die 3, and forming threaded holes 7 are coaxially arranged on the forming positioning stop mouths 8;

[0077] There is a forming upper cavity 10 on the lower end face of the forming upper die 9. Forming upper corresponding inner cavities 11 are respectively arranged at both ends of the forming upper cavity 10. A forming paired positioning head 12 and a forming connecting bolt 13 are coaxially arranged on the forming upper die 9;

[0078] The forming upper cavity 10 and the forming adapter lower cavity 4 are aligned to enclose the wax cavity of the outer wall of the exhaust end cone part 1. The forming male lower inner cavity 5 and the forming mother lower inner cavity 6 are respectively aligned with the corresponding forming upper corresponding inner cavities 11 to enclose the corresponding forming male positioning shoulder 15 and forming mother positioning shoulder 17;

[0079] The forming paired positioning head 12 is inserted into the forming positioning stop mouth 8, and the forming connecting bolt 13 is connected to the forming threaded hole 7;

[0080] The forming upper die 9 is provided with an exhaust valve.

[0081] The method of this embodiment is used to manufacture the exhaust end cone part 1 through the forming die assembly 2; This method includes;

[0082] First, the forming male mandrel 14 and the forming female mandrel 16 are respectively inserted into the two ends of the bending inner cavity of the exhaust end cone part 1 and connected into an integrated mandrel die; then, the mandrel die is placed on the forming lower die 3; secondly, after the forming upper die 9 is positioned and buckled, it is fixed by the forming connection bolt 13; thirdly, wax injection, shaping, mold removal, tree assembly and slurry dipping are sequentially performed.

[0083] As Figures 1-9 , the wax injection machine device of this embodiment includes a forming die assembly 2; the wax injection machine prepares a wax mold part 55 of the exhaust end cone part 1 through the forming die assembly 2; the device also includes two core shaft deflection feeding belts 34 arranged at 90 degrees; the two core shaft deflection feeding belts 34 respectively place the forming male mandrel 14 and the forming female mandrel 16.

[0084] At the converging output end of the two core shaft deflection feeding belts 34, there is a core shaft pairing station 35, where the forming male mandrel 14 and the forming female mandrel 16 are assembled and paired into an integrated mandrel die at the core shaft pairing station 35; at the output end of the core shaft pairing station 35, there is an input end of a core shaft output conveyor belt 36 to convey the mandrel die.

[0085] At the core shaft pairing station 35, there is a core shaft pulling U-shaped fork head 37 controlled by a manipulator; the core shaft pulling U-shaped fork head 37 is inserted on the forming male pulling flexible shaft 22 and pulls the forming male rear clamping plate 23 outwards and assists in fixing.

[0086] The wax injection machine device of this embodiment includes a process preparation production line 38.

[0087] The process preparation production line 38 includes a process conveyor belt 40; on the process conveyor belt 40, there are sequentially distributed a lower die loading station 41, a core shaft loading station 42, an upper cover loading station 43, a fixing station 44, a connection station 45, a fastening tapping machine 51, a wax injection station 52, a removal station 53 and / or a tree assembly station 54.

[0088] At the lower die loading station 41, there is a manipulator to place the forming lower die 3 on the process conveyor belt 40.

[0089] At the core shaft loading station 42, there is a manipulator to assemble the core shaft die on the forming lower die 3.

[0090] At the upper cover loading station 43, there is an upper cover feeding conveyor device 39 to buckle the assembled mandrel die onto the forming lower die 3 on the process conveyor 40, and the forming mating positioning head 12 is inserted downward into the forming positioning stop 8; the upper cover feeding conveyor device 39 includes a horizontally arranged upper cover conveyor belt 46, at the output end of the upper cover conveyor belt 46 there is an upper cover dropping station 47, above the upper cover dropping station 47 there is an upper cover pressing head 50, on the bearing surface of the upper cover dropping station 47 there is an upper cover swinging opening and closing plate 48 arranged in a mating manner, and below the upper cover dropping station 47 there is an upper cover side guiding and limiting plate 49 for downward guiding; the upper cover pressing head 50 is provided with a suction nozzle or an electromagnet; at the fixing station 44, there is a pressing head above the process conveyor 40 to press the forming upper die 9 and the forming lower die 3 into one body; there is an upper jacking head below the process conveyor 40 to lift the process conveyor 40 upward.

[0091] At the connecting station 45, there is a manipulator and / or a fastening tapping machine 51. The manipulator places the formed connecting bolt 13 onto the forming upper die 9, and the fastening tapping machine 51 connects the formed connecting bolt 13 with the formed threaded hole 7.

[0092] At the wax injection station 52, there is a wax injection machine to inject liquid wax into the wax cavity of the forming die assembly 2 to form a wax mold part 55.

[0093] At the taking-out station 53, there is a manipulator for opening the cooled forming die assembly 2 and taking out the wax mold part 55.

[0094] At the tree assembling station 54, the wax mold parts 55 are assembled into a tree. Adjacent wax mold parts 55 in each layer are connected through an intermediate transition connecting sleeve 56 to form a ring-shaped part. There are intermediate through holes 57 distributed on the intermediate transition connecting sleeve 56 for the slurry dipping process.

[0095] The wax injection machine device of this embodiment includes an intermediate transition connecting sleeve 56 and an intermediate connecting center frame 58 arranged at the tree assembling station 54.

[0096] The intermediate connecting center frame 58 is connected with the intermediate transition connecting sleeve 56 through a cross bar.

[0097] At the tree assembling station 54, the wax mold parts 55 are assembled into a tree. Adjacent wax mold parts 55 in each layer are connected through an intermediate transition connecting sleeve 56 to form a ring-shaped part. There are intermediate through holes 57 distributed on the intermediate transition connecting sleeve 56 for the slurry dipping process.

[0098] At the top of the intermediate connecting center frame 58, there is an intermediate frame tail cone 59 with an inner conical hole. Axially arranged on the side wall of the intermediate frame tail cone 59 is an intermediate frame side groove 60 communicating with the inner conical hole.

[0099] Above the tail cone 59 of the intermediate frame, there is a manipulator arm 62 controlled by a manipulator. Below the manipulator arm 62, there is a manipulator outer taper 63 to fit with the inner taper hole.

[0100] On the manipulator outer taper 63, there is a manipulator through-hole 65.

[0101] At the lower end of the manipulator outer taper 63, there is a manipulator L-hook 64. Inside the tail cone 59 of the intermediate frame, there is an intermediate frame inner cavity baffle 61. The manipulator L-hook 64 rotates to hook with the intermediate frame inner cavity baffle 61. At the same time, the manipulator through-hole 65 corresponds to the intermediate frame side groove 60. On the manipulator arm 62, there is a manipulator fixed pulling radial rod 66. On the manipulator fixed pulling radial rod 66, there is a manipulator inserting wedge 67 to insert the manipulator inserting wedge 67 into the manipulator through-hole 65 and the intermediate frame side groove 60.

[0102] With the help of the process conveyor belt 40; First, at the lower die loading station 41, the manipulator places the formed lower die 3 on the process conveyor belt 40. Then, at the mandrel loading station 42, the manipulator assembles the mandrel die on the formed lower die 3. Secondly, at the upper cover dropping station 47, the upper cover pressing head 50 presses down to open the upper cover swing opening and closing plate 48 of the formed upper die 9, and installs the formed upper die 9 on the formed lower die 3 at the upper cover loading station 43. Thirdly, at the fixing station 44, the pressing head presses the formed upper die 9 and the formed lower die 3 together as a whole. At the same time, the upper ejector head lifts the process conveyor belt 40 upward. Subsequently, at the connecting station 45, the manipulator places the formed connecting bolt 13 on the formed upper die 9, and the fastening tapping machine 51 connects the formed connecting bolt 13 with the formed threaded hole 7. Then, at the wax injection station 52, the wax injection machine passes the wax liquid through the formed mother wax liquid channel 30 and the formed mother wax liquid cavity 29 through the wax injection pipeline, and the wax liquid is conveyed from the formed mother output channel 31 to the wax forming cavity. Next, at the taking-out station 53, the cooled formed mold assembly 2 is opened and the wax mold part 55 is taken out. Then, at the tree assembling station 54, the wax mold parts 55 are assembled into a tree. Adjacent wax mold parts 55 in each layer are connected by an intermediate transition connecting sleeve 56 to form a ring-shaped part.

[0103] In the mandrel die where the forming male mandrel 14 and the forming female mandrel 16 are inserted into both ends of the bending inner cavity of the exhaust end cone 1 respectively and connected as a whole, first, the forming female mandrel 16 is aligned with the forming male mandrel 14; then, the forming male orientation key 21 is fitted and fixed with the forming end orientation key groove 33 and connected as a whole; secondly, the inner pushing forming male pulling flexible shaft 22 is pushed, so that the forming radial channel 25 is aligned and communicated with the forming end channel 32; thirdly, the forming male front clamping baffle 24 is exposed in the forming female front cavity 28 after passing through the forming radial channel 25 and the forming end channel 32. After the inner pushing forming male pulling flexible shaft 22 is rotated 90 degrees, the inner pushing forming male pulling flexible shaft 22 is pulled outwards, and is clamped by the forming male rear clamping plate 23 on the outer end face of the forming male positioning shoulder 15, so that the forming male front clamping baffle 24 is in pressure contact with the inner end part of the forming female front cavity 28.

[0104] In the mandrel assembly process, first, the forming male mandrel 14 and the forming female mandrel 16 are sent to the mandrel pairing station 35 through their respective mandrel direction-changing feeding belts 34; thirdly, at the mandrel pairing station 35, the mandrel output conveyor belt 36 conveys the mandrel die onto the forming lower die 3 at the mandrel loading station 42.

[0105] In the tree assembly process, first, at the tree assembly station 54, the wax pattern parts 55 are assembled into a ring through the intermediate transition connecting sleeve 56 and installed on the intermediate connecting center frame 58; secondly, the manipulator L hook 64 rotates to hook with the inner cavity baffle 61 of the intermediate frame. At the same time, the manipulator through hole 65 corresponds to the intermediate frame side groove 60; thirdly, the manipulator inserted wedge 67 is inserted into the manipulator through hole 65 and the intermediate frame side groove 60.

[0106] The present invention designs a brand-new forming die assembly 2 for the exhaust end cone part 1, and the forming lower die 3 has good fit, convenient forming, a forming-adapted lower cavity 4, a male forming lower inner cavity 5, a female forming lower inner cavity 6, which is convenient for positioning and forming. A formed threaded hole 7 and a formed positioning stop 8 are used to achieve positioning and fixing, and the formed upper die 9 is used for installation. A formed upper cavity 10 and a formed upper corresponding inner cavity 11 are used for matching. A formed mating positioning head 12 and a formed connecting bolt 13 are used to achieve positioning connection. A formed male mandrel 14, a formed male positioning shoulder 15, a formed female mandrel 16, and a formed female positioning shoulder 17 are used for positioning. Through a separation structure, rapid disassembly and assembly are achieved. A formed male-adapted mandrel sleeve 18 and a formed female-adapted mandrel sleeve 19 are used for forming. A formed male positioning plug 20 and a formed male orientation key 21 are used for positioning and angle determination. The formed male pulling flexible shaft 22 can be a flexible shaft, a steel wire or a spring rod, which is used for connection and fixing. Of course, a device for adjusting the length can be added to increase versatility and facilitate installation. A formed male rear clamping plate 23 and a formed male front clamping baffle 24 are used for fixing and disassembly. A formed female partition 27, a formed female front-end cavity 28, a formed female wax-passing liquid cavity 29, a formed female wax liquid channel 30, a formed female output channel 31, a formed end channel 32, and a formed end orientation key groove 33 are used to feed liquid wax, feed it, and at the same time achieve smooth exhaust and uniform exhaust. The present invention realizes a positioning shoulder, which can be a fixed installation mandrel, and is convenient for forming a sealed space.

[0107] The mandrel deflecting and feeding belt 34 of the present invention is convenient for loading. The mandrel pairing station 35 is used for pairing. The mandrel output conveyor belt 36 is used for installation. The mandrel pulling U-shaped fork head 37 is convenient for pulling. The process preparation production line 38 realizes the connection of workstations. The upper cover feeding device 39 is used for feeding. The process conveyor belt 40 is used for conveying. The lower die loading station 41, the mandrel loading station 42, the upper cover loading station 43, the fixing station 44, the connecting station 45, the upper cover feeding conveyor belt 46, and the upper cover falling station 47 realize the connection of workstations. The upper cover swinging opening and closing plate 48, the upper cover side guiding and limiting plate 49, and the upper cover pressing head 50 are convenient for unloading workpieces. The fastening tapping machine 51, the wax injection station 52, the taking-out station 53, and the tree assembly station 54 complete each process after the wax pattern part 55. The intermediate transition connecting sleeve 56 realizes simultaneous operation of multiple units at the same time. The intermediate through hole 57 is convenient for ventilation and slurry dipping. The intermediate connecting center frame 58 is the main body, and the present invention is convenient and efficient for slurry dipping.

Claims

1. A method for manufacturing an exhaust end cone part, characterized in that: For manufacturing an exhaust end cone part (1) through a forming die assembly (2); the method includes; First, a forming male mandrel (14) and a forming female mandrel (16) are respectively inserted into both ends of the bent inner cavity of the exhaust end cone part (1) and connected into an integral mandrel die; then, the mandrel die is placed on a forming lower die (3); second, after positioning and buckling a forming upper die (9), it is fixed through a forming connecting bolt (13); third, wax injection, shaping, mold removal, tree building and slurry dipping are sequentially performed; By means of a process conveyor belt (40); first, at a lower die loading station (41), a manipulator places the forming lower die (3) on the process conveyor belt (40); then, at a mandrel loading station (42), the manipulator assembles the mandrel die on the forming lower die (3); second, at an upper cover feeding and falling station (47), a lower pressing head (50) of the upper cover presses down the forming upper die (9) to open a swing opening and closing plate (48) of the upper cover, and installs the forming upper die (9) on the forming lower die (3) at an upper cover loading station (43); third, at a fixing station (44), the lower pressing head presses the forming upper die (9) and the forming lower die (3) into an integral body, and at the same time, an upper jacking head lifts the process conveyor belt (40) upward; subsequently, at a connecting station (45), the manipulator places the forming connecting bolt (13) on the forming upper die (9), and a fastening tapping machine (51) connects the forming connecting bolt (13) with a forming threaded hole (7); then, at a wax injection station (52), a wax injection machine conveys molten wax through a forming female wax liquid channel (30) and a forming female liquid wax cavity (29) through a wax injection pipeline, and the molten wax is conveyed from a forming female output channel (31) into a wax forming cavity; next, at a removal station (53), the cooled forming die assembly (2) is opened and a wax mold part (55) is removed; then, at a tree building station (54), the wax mold parts (55) are tree built, and adjacent wax mold parts (55) in each layer are connected through an intermediate transition connecting sleeve (56) to form an annular part.

2. The method for manufacturing an exhaust end cone according to claim 1, characterized in that: In the mandrel die where the forming male mandrel (14) and the forming female mandrel (16) are respectively inserted into both ends of the bent inner cavity of the exhaust end cone part (1) and connected into an integral body, first, the forming female mandrel (16) and the forming male mandrel (14) are aligned; then, a forming male orientation key (21) and a forming end orientation key groove (33) are adapted, shaped and connected into an integral body; second, an inner pushing forming male pulling flexible shaft (22) is pushed, so that a forming radial channel (25) and a forming end channel (32) are aligned and communicated; third, a forming male front clamping baffle (24) passes through the forming radial channel (25) and the forming end channel (32) and then exposes in a forming female front cavity (28), the inner pushing forming male pulling flexible shaft (22) is rotated 90 degrees and then pulled outward, and is clamped by a forming male rear clamping plate (23) on the outer end face of a forming male positioning shoulder (15), so that the forming male front clamping baffle (24) is in pressure contact with the inner end part of the forming female front cavity (28).

3. The method for manufacturing an exhaust end cone according to claim 1, characterized in that: In the mandrel assembly process, first, the forming male mandrel (14) and the forming female mandrel (16) are sent to the mandrel alignment station (35) through their respective mandrel turning feed belts (34); second, at the mandrel alignment station (35), the mandrel output conveyor belt (36) conveys the mandrel die to the forming lower die (3) at the mandrel loading station (42). In the tree assembly process, first, at the tree assembly station (54), the wax pattern parts (55) are assembled into a ring through the intermediate transition connecting sleeve (56) and installed on the intermediate connecting center frame (58); second, the manipulator L hook (64) rotates to hook with the inner cavity baffle (61) of the intermediate frame. At the same time, the manipulator through hole (65) corresponds to the lateral groove (60) of the intermediate frame; third, the manipulator inserted wedge (67) is inserted into the manipulator through hole (65) and the lateral groove (60) of the intermediate frame.

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