A large gearbox housing assembly casting apparatus

Abstract

The present application relates to gearbox casting technical field, disclose a kind of large gearbox body combination casting equipment, comprising: sand mixer, for making self-hardening sand;At least one molding machine, for the self-hardening sand made is at least twice compaction forming, form upper sand mould and lower sand mould;First conveying assembly, it is set in molding machine middle part, for the sand box used to make upper sand mould or lower sand mould is conveyed to the bottom die of molding machine, also for the upper sand mould or lower sand mould made is conveyed to above pouring table;Second conveying assembly, with first conveying assembly is located in same conveying line, for the upper sand mould or lower sand mould is conveyed to pouring table, and make the upper sand mould positioning placement on lower sand mould.First conveying assembly and molding machine closely cooperate to complete the production of upper sand mould or lower sand mould, directly convey upper sand mould or lower sand mould on same conveying line to second conveying assembly, only need to position the conveying direction of sand box, can reduce manual operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gearbox casting, and more particularly, to a large gearbox body combined casting device. BACKGROUND

[0002] The structure of the large gearbox body is complex, and usually has bearing seats, reinforcing ribs, oil channels, etc. inside. The large gearbox body is large in size and weight. In the traditional casting process, the cooperation of equipment in each process still needs to rely on manual operation, such as manual handling, etc., which leads to low production efficiency. In particular, after the upper sand mold and the lower sand mold are made by the molding machine, the mold needs to be closed and poured. Generally, manual handling or a conveying mechanism is used to complete the operation. The manual handling method will lead to reduced precision for the mold closing operation. The conveying mechanism is usually not closely matched with the molding machine, and is generally arranged outside the molding machine. Therefore, when the upper sand mold and the lower sand mold are placed on the conveying mechanism after being made, the upper sand mold and the lower sand mold need to be positioned in multiple directions, which may lead to inaccurate positioning precision when the mold is closed.

[0003] In the prior art, a molding mechanism of a sand casting automatic molding machine is disclosed in Chinese Utility Model Patent No. CN219881242U. The molding mechanism comprises a sand casting automatic molding machine body, a mold box and a sand molding plate arranged on the sand casting automatic molding machine body. The top and right side of the mold box are open structures. The sand molding plate is located directly above the mold box. A first electric hydraulic cylinder is fixedly installed on the sand casting automatic molding machine body. The sand molding plate is detachably arranged at the output shaft end of the first electric hydraulic cylinder. The sand in the mold box can be vibrated flat first, and then the vibrated sand in the mold box can be pressure molded. In this way, the sand can be uniformly dispersed and stressed in the mold box, and cracks in the sand can be avoided during the molding process. The molding quality of the sand can be effectively improved, and the molded sand can be easily pushed out of the mold box for convenient material taking. It can be seen that the molded sand needs to be pushed out of the mold box, and the conveying mechanism needs to be arranged outside the molding machine or the material needs to be taken by manual handling. This is not convenient for the conveying and positioning of the upper sand mold and the lower sand mold of the large gearbox body.

[0004] Therefore, it is necessary to provide a large gearbox body combined casting device to at least partially solve the problems in the prior art. SUMMARY

[0005] A series of simplified concepts are introduced in the summary section, which will be further described in detail in the specific embodiment section. The summary section of the present application does not mean to attempt to limit the key features and necessary technical features of the claimed technical solution, and even less to determine the protection scope of the claimed technical solution.

[0006] To at least partially solve the above problems, the present application provides a large gearbox housing combined casting equipment, comprising:

[0007] A sand mixer is used to make self-hardening sand;

[0008] At least one molding machine is used to perform at least twice compaction molding on the made self-hardening sand to form an upper sand mold and a lower sand mold;

[0009] A first conveying assembly is arranged in the middle of the molding machine and is used to convey a sand box used for making the upper sand mold or the lower sand mold to the bottom mold of the molding machine and also used to convey the made upper sand mold or lower sand mold to above the pouring table;

[0010] A second conveying assembly is arranged on the same conveying line as the first conveying assembly and is used to convey the upper sand mold or the lower sand mold to the pouring table and make the upper sand mold positioned and placed on the lower sand mold.

[0011] Preferably, the molding machine comprises:

[0012] A first lifting mechanism is arranged on the molding table, a second lifting mechanism is arranged on the lifting platform of the first lifting mechanism, a compaction mechanism is arranged at the bottom of the lifting platform, the first conveying assembly is arranged at the lifting end of the second lifting mechanism, and the sand box is arranged below the compaction mechanism;

[0013] The bottom mold is arranged on the molding table and corresponds to the sand box, and the sand box is placed on the bottom mold to form a sand injection space;

[0014] A sand injection cylinder is connected with the lifting end of the second lifting mechanism and arranged outside the compaction mechanism and is used to inject self-hardening sand into the sand injection space.

[0015] Preferably, the outside of the bottom mold is provided with a positioning frame, and the molding table is provided with a third lifting mechanism used to control the up-down movement of the positioning frame.

[0016] Preferably, the molding machine is formed by twice compaction molding, comprising:

[0017] When the self-hardening sand is injected, the positioning frame is moved upward to a first contact position, the bottom of the sand injection cylinder contacts the top of the sand box, the bottom of the sand box contacts the top of the positioning frame, and the bottom surface of the sand box is away from the top plane of the bottom mold by a first distance;

[0018] When the first compaction is performed, the compaction mechanism is moved downward to compact the self-hardening sand, and when a first set pressure is reached or the compaction mechanism is moved to a first compaction position, the compaction is stopped;

[0019] When the second compaction is performed, the compaction mechanism is moved downward from the first compaction position, and the third lifting mechanism simultaneously drives the positioning frame to move downward until the positioning frame moves to a second contact position, and the compaction is stopped.

[0020] The second contact position is that the bottom surface of the sand box is flush with the top surface of the bottom mold.

[0021] Preferably, the two sides of the sand box are provided with overlapping parts, and the upper side and the lower side of the overlapping parts are provided with a plurality of limiting tooth grooves.

[0022] Preferably, the first conveying assembly comprises two first conveying belts arranged on the two first mounting plates through the first driving members, and a plurality of first limiting teeth corresponding to the limiting tooth grooves are arranged on the first conveying belts, and the two overlapping parts of the sand box are positioned and placed on the two first conveying belts.

[0023] Preferably, the second conveying assembly comprises:

[0024] two horizontal moving modules, each of which is provided with a lifting module, and the horizontal moving modules are used to drive the lifting modules to move horizontally;

[0025] a rotating module arranged at the lifting end of the lifting module and driven by the lifting module to move up and down;

[0026] two conveying belt groups connected with the two rotating modules, respectively, and the two overlapping parts of the sand box are positioned and placed on the two conveying belt groups, and the conveying belt groups are driven by the rotating modules to be vertically flipped by 180 degrees.

[0027] Preferably, the conveying belt group comprises two second conveying belts, two supporting wheels and two third conveying belts arranged in an upper-lower interval, the second conveying belts, the supporting wheels and the third conveying belts are arranged on the second mounting plate through the second driving members, a conveying gap is formed between the two second conveying belts, the two supporting wheels and the two third conveying belts, and the overlapping part of the sand box is limited at the conveying gap.

[0028] Preferably, a plurality of second limiting teeth corresponding to the limiting tooth grooves are arranged on the second conveying belts, the supporting wheels and the third conveying belts.

[0029] Compared with the prior art, the present application at least has the following beneficial effects:

[0030] The large gearbox body combination casting equipment can be closely matched with the molding machine to complete the production of the upper sand mold or the lower sand mold through the first conveying assembly, and the produced upper sand mold or lower sand mold can be directly conveyed to the second conveying assembly on the same conveying line, and the formed upper sand mold and lower sand mold are automatically conveyed to the pouring table through the second conveying assembly, and the first conveying assembly and the second conveying assembly cooperate with any positioning mode, only the conveying direction of the sand box needs to be positioned, the positioning accuracy is guaranteed, the molding machine and the first conveying assembly and the second conveying assembly can be closely matched, manual operation is reduced, at least two compaction forming is carried out by using the molding machine, the strength of the formed upper sand mold and lower sand mold can be guaranteed, so that deformation and other conditions are prevented during subsequent pouring, and the size accuracy of the casting is improved.

[0031] The large gearbox body combination casting equipment, other advantages, objects and characteristics of the present application will be embodied in part through the following description, and part will be understood by those skilled in the art through research and practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0032] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation on the present application. In the drawings:

[0033] Figure 1 It is a structure schematic view of the large gearbox body combination casting equipment;

[0034] Figure 2 It is a schematic view of the sand mixer and the molding machine in the large gearbox body combination casting equipment;

[0035] Figure 3 It is a schematic view of the internal structure of the molding machine in the large gearbox body combination casting equipment;

[0036] Figure 4 It is a schematic view of the structure of the molding machine when injecting self-hardening sand in the large gearbox body combination casting equipment;

[0037] Figure 5 It is a schematic view of the structure of the molding machine when injecting self-hardening sand in the large gearbox body combination casting equipment;

[0038] Figure 6 It is a schematic view of the structure of the molding machine when injecting self-hardening sand in the large gearbox body combination casting equipment;

[0039] Figure 7 It is a schematic view of the structure of the molding machine when injecting self-hardening sand in the large gearbox body combination casting equipment;

[0040] Figure 8 Structure diagram of the first conveying belt in the large gearbox housing combined casting equipment according to the present application;

[0041] Figure 9 Structure diagram of the sand box in the large gearbox housing combined casting equipment according to the present application;

[0042] Figure 10 Structure diagram of the sand box on the receiving conveying assembly in the large gearbox housing combined casting equipment according to the present application;

[0043] Figure 11 Structure diagram of the sand box on the second conveying assembly in the large gearbox housing combined casting equipment according to the present application;

[0044] Figure 12 Structure diagram of the first conveying assembly conveying the lower sand mold in the large gearbox housing combined casting equipment according to the present application;

[0045] Figure 13 Structure diagram of the second conveying assembly receiving the lower sand mold in the first working state in the large gearbox housing combined casting equipment according to the present application;

[0046] Figure 14 Structure diagram of the second conveying assembly turning the lower sand mold by 180 degrees in the large gearbox housing combined casting equipment according to the present application;

[0047] Figure 15 Structure diagram of the first conveying assembly conveying the upper sand mold in the large gearbox housing combined casting equipment according to the present application;

[0048] Figure 16 Structure diagram of the second conveying assembly receiving the upper sand mold in the second working state in the large gearbox housing combined casting equipment according to the present application.

[0049] In the drawings, 1 is a sand mixer, 2 is a molding machine, 3 is a pouring table, 4 is a first conveying assembly, 41 is a first conveying belt, 411 is a first limiting tooth, 42 is a first mounting plate, 5 is a second conveying assembly, 50 is a conveying gap, 51 is a horizontal moving module, 52 is a lifting module, 53 is a rotating module, 54 is a conveying belt group, 55 is a second conveying belt, 56 is a supporting wheel, 57 is a third conveying belt, 58 is a second mounting plate, 59 is a second limiting tooth, 6 is a bottom mold, 7 is a molding table, 8 is a first lifting mechanism, 81 is a lifting table, 9 is a second lifting mechanism, 10 is a compacting mechanism, 11 is a sand box, 111 is a lap joint, 112 is a limiting tooth groove, 12 is a sand injection cylinder, 13 is a positioning frame, 14 is a third lifting mechanism, and 15 is a receiving conveying assembly. DETAILED DESCRIPTION

[0050] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0051] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0052] like Figures 1-3 As shown, the present invention provides a large gearbox housing assembly casting equipment, comprising:

[0053] Sand mixer 1, used to produce self-hardening sand;

[0054] At least one molding machine 2 is used to compact and mold the prepared self-hardening sand at least twice to form an upper sand mold and a lower sand mold;

[0055] The first conveying component 4 is located in the middle of the molding machine 2. It is used to convey the sand box 11 used to make the upper sand mold or the lower sand mold to the bottom mold 6 of the molding machine 2, and also to convey the made upper sand mold or the lower sand mold to the top of the pouring table 3.

[0056] The second conveying component 5 is located on the same conveying line as the first conveying component 4. It is used to convey the upper sand mold or the lower sand mold to the casting table 3 and to position the upper sand mold on the lower sand mold.

[0057] It also includes: a receiving and conveying component 15, which is disposed between the first conveying component 4 and the second conveying component 5.

[0058] Self-hardening sand is molding sand that can harden itself by adding resin or curing agent during the casting process.

[0059] The sand mixer 1 is used to mix raw sand, resin, curing agent and other raw materials to make self-hardening sand that can be molded. The sand mixer 1 conveys the self-hardening sand to the molding machine 2 through a screw conveyor mechanism. The molding machine 2 uses the self-hardening sand to form an upper sand mold and a lower sand mold by compacting at least twice. When there are two molding machines 2, the two molding machines 2 are respectively set on both sides of the pouring table 3. One molding machine 2 is used to make the upper sand mold and the other molding machine 2 is used to make the lower sand mold.

[0060] During the process of forming the upper and lower sand molds inside the molding machine 2, the first conveying component 4... Figure 1 The machine moves in the up-down direction as shown, working in conjunction with molding machine 2 to create the upper and lower sand molds; after the upper and lower sand molds are created, they are compacted in sand box 11, and the first conveying component 4... Figure 1The sand box 11 is moved in the left and right directions as shown, and is transported to the receiving conveying component 15. The receiving conveying component 15 carries the sand box 11 and continues to move, transporting the sand box 11 to the second conveying component 5. The second conveying component 5 can move the sand box 11 in the left and right directions, flip it vertically, and move it in the up and down directions, so as to transport the upper sand mold and the lower sand mold to the pouring table 3.

[0061] Since the first conveying assembly 4, the receiving conveying assembly 15, and the second conveying assembly 5 are all located on the same conveying line, it is not necessary to position the sand box 11 in the front-back direction. Figure 1 (As shown in the front and back directions) When the sand box 11 works with the molding machine 2 on the first conveying assembly 4, it can be positioned accurately on the bottom mold 6 by any of the existing technologies, such as visual positioning or laser positioning. Similarly, when the sand box 11 is on the second conveying assembly 5, it can also be positioned accurately on the pouring position of the pouring table 3 by any of the existing technologies, such as visual positioning or laser positioning, so that the upper sand mold can be positioned accurately on the lower sand mold for mold closing.

[0062] The specific positioning process can be as follows: the position information of the sand box 11 that carries the lower or upper sand mold is obtained, the position offset is obtained, and then the position of the sand box 11 is adjusted by the first conveying component 4 or the second conveying component 5, so that the lower or upper sand mold can be positioned and placed.

[0063] After the sand mold is made, the lower sand mold is first transported to the pouring platform 3. Then, the prepared sand core is positioned on the lower sand mold. The placement of the sand core can be achieved by using a matching robot arm to clamp, transport, and position the sand core, so as to achieve precise positioning of the sand core. After the sand core is placed, the upper sand mold is transported to the top of the lower sand mold for mold closing. Then, the casting is carried out on the pouring platform 3 to realize the casting of the gearbox housing.

[0064] This invention enables the first conveying component 4 to work closely with the molding machine 2 to create the upper or lower sand mold. The created upper or lower sand mold can be directly conveyed to the second conveying component 5 on the same conveyor line. The second conveying component 5 then automatically conveys the formed upper and lower sand molds to the pouring table 3. The first and second conveying components 4 and 5 can be positioned using any positioning method, requiring only the direction of the sand box 11 to be positioned, ensuring positioning accuracy. This allows the molding machine 2 to work closely with the first and second conveying components 4 and 5, reducing manual operation. The molding machine 2 performs at least two compaction molding processes, ensuring the strength of the formed upper and lower sand molds. This prevents deformation during subsequent pouring and improves the dimensional accuracy of the castings.

[0065] During the process of forming the upper and lower sand molds inside the molding machine 2, the first conveying component 4... Figure 1 The machine moves in the up-down direction as shown, working in conjunction with molding machine 2 to create the upper and lower sand molds; after the upper and lower sand molds are created, they are compacted in sand box 11, and the first conveying component 4... Figure 1 The sand box 11 is moved in the left and right directions as shown, and is transported to the receiving conveying component 15. The receiving conveying component 15 carries the sand box 11 and continues to move, transporting the sand box 11 to the second conveying component 5. The second conveying component 5 can move the sand box 11 in the left and right directions, flip it vertically, and move it in the up and down directions, so as to transport the upper sand mold and the lower sand mold to the pouring platform 3.

[0066] like Figure 9 As shown, in one embodiment, the sand box 11 has overlapping portions 111 on both sides, and the upper and lower sides of the overlapping portions 111 are provided with multiple limiting grooves 112.

[0067] The middle part of the sand box 11 is used to form the upper sand mold and the lower sand mold. The overlapping part 111 of the sand box 11 is used to overlap and limit the sand box 11 with the first conveying component 4, the receiving conveying component 15 and the second conveying component 5 to ensure the stability of the sand box 11 during the conveying process. The limiting groove 112 provided on the sand box 11 can also cooperate with each conveying component to prevent the position of the sand box 11 from shifting during the conveying process, and further ensure the stability of the conveying.

[0068] like Figure 3 and Figure 8 As shown, in one embodiment, the first conveying assembly 4 includes: two first conveyor belts 41, which are respectively mounted on two first mounting plates 42 by a first driving member. The first conveyor belts 41 are provided with a plurality of first limiting teeth 411 corresponding to the limiting tooth grooves 112. The two overlapping parts 111 of the sand box 11 are respectively positioned on the two first conveyor belts 41.

[0069] The first driving component is used to drive the pulley of the first conveyor belt 41 to rotate, thereby driving the first conveyor belt 41 to move. The first mounting plate 42 is connected to the lifting end of the second lifting mechanism 9 of the molding machine 2 to cooperate with the operation of the molding machine 2. The two overlapping parts 111 of the sand box 11 are respectively placed on the two first conveyor belts 41, so that the limiting tooth groove 112 and the first limiting tooth 411 on the first conveyor belt 41 are correspondingly engaged to ensure the stability of the sand box 11 during the conveying process.

[0070] like Figure 13 As shown, in one embodiment, the second conveying component 5 includes:

[0071] Two transverse modules 51 are provided, and each transverse module 51 is equipped with a lifting module 52. The transverse module 51 is used to drive the lifting module 52 to move laterally.

[0072] The rotating module 53 is located at the lifting end of the lifting module 52, and the lifting module 52 drives the rotating module 53 to move up and down.

[0073] Two conveyor belt groups 54 are connected to two rotating modules 53 respectively. The two overlapping parts 111 of the sand box 11 are respectively positioned on the two conveyor belt groups 54. The rotating modules 53 drive the conveyor belt groups 54 to rotate vertically by 180 degrees.

[0074] The transverse module 51, the lifting module 52, and the rotation module 53 can all be driven by cylinders;

[0075] like Figure 12 As shown, when the first conveying component 4 is conveying the lower sand mold, the height of the two conveyor belt groups 54 is adjusted by the lifting module 52 to support the lower sand mold. The second conveying component 5 is as follows: Figure 13 The first working state shown receives the lower sand mold. When the lower sand mold is conveyed to the flipping position, the rotating module 53 drives the conveyor belt group 54 to flip 180 degrees, and the sand box 11, which is limited on the conveyor belt group 54, flips 180 degrees simultaneously, flipping the lower sand mold. Then the second conveying component 5 is as follows: Figure 14 The second working state is shown. Then, the lifting module 52 drives the conveyor belt group 54 to move downward, placing the sand box 11 on the pouring platform 3. Then, the horizontal moving module 51 moves the two conveyor belt groups 54 away from each other, so that the conveyor belt group 54 is separated from the sand box 11, completing the placement of the lower sand mold.

[0076] like Figure 15 As shown, when the first conveying assembly 4 conveys the upper sand mold, the height of the two conveyor belt groups 54 is adjusted by the lifting module 52 to support the upper sand mold, and the second conveying assembly 5... Figure 16 The second working state shown is to receive the upper sand mold. When the upper sand mold is conveyed to the top of the lower sand mold, the lifting module 52 drives the conveyor belt group 54 to move downward, placing the sand box 11 on the sand box 11 of the lower sand mold. Then, the horizontal moving module 51 moves the two conveyor belt groups 54 away from each other, so that the conveyor belt group 54 is separated from the sand box 11, completing the placement of the upper sand mold.

[0077] With the above technical solution, when it is necessary to flip the sand box 11, the rotating module 53 can be used to flip the entire conveyor belt group 54. When it is not necessary to flip the sand box 11, the second conveying component 5 can receive the sand box 11 in the second working state.

[0078] like Figure 11 and Figure 13As shown, the conveyor belt assembly 54 further includes: two second conveyor belts 55 arranged vertically at intervals, two support wheels 56, and two third conveyor belts 57. The second conveyor belts 55, support wheels 56, and third conveyor belts 57 are mounted on the second mounting plate 58 by a second driving member. A conveying gap 50 is formed between the two second conveyor belts 55, the two support wheels 56, and the two third conveyor belts 57. The overlapping portion 111 of the sand box 11 is limited at the conveying gap 50.

[0079] Furthermore, the second conveyor belt 55, the support wheel 56, and the third conveyor belt 57 are each provided with a plurality of second limiting teeth 59 corresponding to the limiting tooth groove 112.

[0080] like Figure 10 and Figure 11 As shown, the receiving and conveying assembly 15 is located upstream of the second conveying assembly 5. The receiving and conveying assembly 15 also includes a transverse module 51 and a lifting module 52, and also includes a third mounting plate disposed on the lifting module 52. A fourth conveyor belt is disposed on the third mounting plate via a third driving component. The fourth conveyor belt is provided with a third limiting tooth corresponding to the limiting tooth groove 112.

[0081] After the sand box 11 is conveyed by the first conveying assembly 4 to the receiving conveying assembly 15, the third limiting tooth on the fourth conveyor belt of the receiving conveying assembly 15 meshes with the limiting tooth groove 112 on the sand box 11. Then, the receiving conveying assembly 15 conveys the sand box 11 to the conveying gap 50 of the second conveying assembly 5. The limiting tooth grooves 112 on the upper and lower sides of the sand box 11 mesh with the upper and lower second limiting teeth 59 respectively. When the middle part of the sand box 11 moves to the support wheel 56, that is, moves to the flipping position, the conveyor belt assembly 54 can effectively support the sand box 11 so that the sand box 11 can be flipped 180 degrees. During the flipping process, the position of the sand box 11 can be limited and fixed by the meshing of the limiting tooth groove 112 and the second limiting tooth 59 to prevent it from falling. The support wheel 56 can provide strong support for the middle part of the sand box 11 to ensure the clamping strength of the sand box 11.

[0082] like Figure 3 As shown, in one embodiment, the molding machine 2 includes:

[0083] A first lifting mechanism 8 is set on the molding platform 7, and a second lifting mechanism 9 is set on its lifting platform 81. A compaction mechanism 10 is set at the bottom of the lifting platform 81. A first conveying component 4 is set at the lifting end of the second lifting mechanism 9. The sand box 11 is set below the compaction mechanism 10.

[0084] The bottom mold 6 is set on the molding table 7 and is set in correspondence with the sand box 11. After the sand box 11 is placed on the bottom mold 6, a sand injection space is formed.

[0085] The sand injection cylinder 12 is connected to the lifting end of the second lifting mechanism 9 and is set outside the compaction mechanism 10. It is used to inject self-hardening sand into the sand injection space.

[0086] The lower part of the sand injection cylinder 12 is an annular cylinder with a nozzle on the side near the compaction mechanism 10. The moving end of the compaction mechanism 10 can move up and down. The inner and outer annular walls of the sand injection cylinder 12 are provided with multiple air outlets, which are connected to compressed air from the outside to provide air at a certain pressure into the sand injection cylinder 12. At the same time, the feed port at the top of the sand injection cylinder 12 is sealed. The pressurized air allows the self-hardening sand in the sand injection cylinder 12 to float and be ejected from the nozzle into the sand injection space under a certain pressure, thus achieving rapid sand injection. An exhaust port is also provided on the bottom mold 6, from which air can be discharged during the sand injection process.

[0087] When the first lifting mechanism 8 moves up and down, it drives the second lifting mechanism 9, the compaction mechanism 10, the sand injection cylinder 12, the first conveying component 4, and the sand box 11 to move synchronously; when the second lifting mechanism 9 moves up and down, it drives the sand injection cylinder 12, the first conveying component 4, and the sand box 11 to move synchronously; the bottom of the compaction mechanism 10 is the operating end, and the compaction mechanism 10 can be pneumatically compacted, for example, by compressing gas to form pressure on the compaction plate of the compaction mechanism 10, thereby compacting the self-hardening sand in the sand injection space;

[0088] When the sand box 11 moves downwards onto the bottom mold 6, the two form a sand injection space. After the self-hardening sand is filled into the sand injection space, the compaction operation can be carried out.

[0089] like Figure 3 As shown, in one embodiment, the outer side of the bottom mold 6 is provided with a positioning frame 13, and the molding platform 7 is provided with a third lifting mechanism 14 for controlling the up and down movement of the positioning frame 13.

[0090] like Figure 9 As shown, an inclined surface is formed between the overlapping portion 111 of the sand box 11 and the body of the sand box 11, as... Figure 3 As shown, the top inner side of the positioning frame 13 is an inclined surface corresponding to the inclined surface of the sand box 11. In this way, when the sand box 11 is placed on the positioning frame 13, it can be positioned and placed to prevent the position of the sand box 11 from shifting.

[0091] The third lifting mechanism 14 is used to drive the positioning frame 13 to move up and down, and multiple compaction operations can be achieved by adjusting the position of the positioning frame 13.

[0092] The specific compaction process is as follows:

[0093] The molding machine 2 forms the product through two compaction processes, including:

[0094] like Figure 4As shown, when self-hardening sand is injected, the positioning frame 13 moves upward to the first contact position, the bottom of the sand injection cylinder 12 contacts the top of the sand box 11, and the bottom of the sand box 11 contacts the top of the positioning frame 13, so that the bottom surface of the sand box 11 is a first distance away from the top plane of the bottom mold 6.

[0095] Among them, the top plane of the bottom mold 6 is the lowest plane of its top, that is, the bottom surface of the sand mold after it is formed;

[0096] like Figure 5 As shown, at this time, the operating end of the compaction mechanism 10 opens the nozzle and injects air at a certain pressure into the sand injection cylinder 12, so that the hard sand is ejected from the nozzle and injected into the sand injection space. After the sand injection space is filled with sand, the first compaction can be carried out.

[0097] like Figure 6 As shown, during the first compaction, the compaction mechanism 10 moves downward to compact the self-hardening sand. When the first set pressure is reached or the compaction mechanism 10 moves downward to the first compaction position (achieved by the downward movement of the actuating end of the compaction mechanism 10), the compaction stops.

[0098] like Figure 7 As shown, during the second compaction, as the compaction mechanism 10 moves downward from the first compaction position (achieved by the first lifting mechanism 8 moving downward), the third lifting mechanism 14 simultaneously drives the positioning frame 13 to move downward until the positioning frame 13 moves to the second contact position, at which point compaction stops.

[0099] The second contact position is where the bottom surface of the sand box 11 is flush with the top surface of the bottom mold 6.

[0100] During the first compaction, a pre-compression pressure is applied to level the sand at the top of the sand injection space, forming an initial sealed sand surface. The pressure is monitored in real time by a pressure sensor on the compaction mechanism 10. After pre-compression, high-pressure air drives the compaction plate downward. The force generated by the high-pressure air in the air chamber above the compaction plate acts evenly on the self-hardening sand in the entire sand injection space. The pressure is monitored in real time by a pressure sensor to ensure that the applied force meets the first set compaction pressure. The first compaction operation can be performed by using high-pressure air to create an instantaneous impact force on the compaction plate. After the impact, the pressure is held for a set time to allow the pressure wave to fully propagate and attenuate within the compacted self-hardening sand, ensuring a tight compaction effect.

[0101] During the second compaction, the compaction mechanism 10 moves downward under the drive of the first lifting mechanism 8, while the positioning frame 13 moves downward synchronously. The purpose is to carry out the second compaction at a slower speed to improve the density and strength of the sand mold, ensure the stability of the sand mold during subsequent pouring, prevent deformation, and improve the dimensional accuracy of the casting.

[0102] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0103] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0104] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the present invention, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A large gearbox housing assembly casting equipment, characterized in that, include: Sand mixer (1), used to produce self-hardening sand; At least one molding machine (2) is used to compact the prepared self-hardening sand at least twice to form an upper sand mold and a lower sand mold; The first conveying component (4) is located in the middle of the molding machine (2) and is used to convey the sand box (11) used to make the upper sand mold or the lower sand mold to the bottom mold (6) of the molding machine (2). It is also used to convey the made upper sand mold or the lower sand mold to the top of the pouring table (3). The second conveying assembly (5) is located on the same conveying line as the first conveying assembly (4) and is used to convey the upper sand mold or the lower sand mold to the pouring table (3) and position the upper sand mold on the lower sand mold. It also includes: a receiving conveying assembly (15) disposed between the first conveying assembly (4) and the second conveying assembly (5); The sand box (11) has overlapping parts (111) on both sides, and multiple limiting grooves (112) are provided on the upper and lower sides of the overlapping parts (111). The first conveying assembly (4) includes: two first conveyor belts (41), which are respectively mounted on two first mounting plates (42) by a first driving member. The first conveyor belts (41) are provided with a plurality of first limiting teeth (411) corresponding to the limiting tooth grooves (112). The two overlapping parts (111) of the sand box (11) are respectively positioned on the two first conveyor belts (41). The second conveying assembly (5) includes: Two transverse modules (51), each transverse module (51) is equipped with a lifting module (52), the transverse module (51) is used to drive the lifting module (52) to move laterally; The rotating module (53) is located at the lifting end of the lifting module (52), and the lifting module (52) drives the rotating module (53) to move up and down. Two conveyor belt groups (54) are connected to two rotating modules (53) respectively. The two overlapping parts (111) of the sand box (11) are respectively positioned on the two conveyor belt groups (54). The rotating modules (53) drive the conveyor belt groups (54) to rotate vertically by 180 degrees.

2. The large gearbox housing assembly casting equipment according to claim 1, characterized in that, The molding machine (2) includes: A first lifting mechanism (8) is set on the molding platform (7), and a second lifting mechanism (9) is set on its lifting platform (81). A compaction mechanism (10) is set at the bottom of the lifting platform (81). A first conveying component (4) is set at the lifting end of the second lifting mechanism (9). The sand box (11) is set below the compaction mechanism (10). The bottom mold (6) is set on the molding platform (7) and is set in correspondence with the sand box (11). After the sand box (11) is placed on the bottom mold (6), a sand injection space is formed. The sand injection cylinder (12) is connected to the lifting end of the second lifting mechanism (9) and is set outside the compaction mechanism (10) for injecting self-hardening sand into the sand injection space.

3. The large gearbox housing assembly casting equipment according to claim 2, characterized in that, The bottom mold (6) is provided with a positioning frame (13) on its outer side, and the molding platform (7) is provided with a third lifting mechanism (14) for controlling the up and down movement of the positioning frame (13).

4. The large gearbox housing assembly casting equipment according to claim 3, characterized in that, The molding machine (2) is formed by two compaction processes, including: When self-hardening sand is injected, the positioning frame (13) moves upward to the first contact position, the bottom of the sand injection cylinder (12) contacts the top of the sand box (11), and the bottom of the sand box (11) contacts the top of the positioning frame (13), so that the bottom surface of the sand box (11) is a first distance away from the top plane of the bottom mold (6). During the first compaction, the compaction mechanism (10) moves downward to compact the self-hardening sand. When the first set pressure is reached or the compaction mechanism (10) moves downward to the first compaction position, the compaction stops. During the second compaction, as the compaction mechanism (10) moves downward from the first compaction position, the third lifting mechanism (14) simultaneously drives the positioning frame (13) downward until the positioning frame (13) moves to the second contact position and stops compaction. The second contact position is where the bottom surface of the sand box (11) is flush with the top surface of the bottom mold (6).

5. The large gearbox housing assembly casting equipment according to claim 1, characterized in that, The conveyor belt assembly (54) includes two second conveyor belts (55) arranged at intervals, two support wheels (56) and two third conveyor belts (57). The second conveyor belts (55), support wheels (56) and third conveyor belts (57) are mounted on a second mounting plate (58) by a second driving member. A conveying gap (50) is formed between the two second conveyor belts (55), the two support wheels (56) and the two third conveyor belts (57). The overlapping part (111) of the sand box (11) is limited at the conveying gap (50).

6. The large gearbox housing assembly casting equipment according to claim 5, characterized in that, The second conveyor belt (55), the support wheel (56) and the third conveyor belt (57) are each provided with a plurality of second limiting teeth (59) corresponding to the limiting tooth groove (112).

Images