Combined casting equipment for large gearbox body

Abstract

The invention relates to the technical field of gearbox casting, and discloses large gearbox body combined casting equipment which comprises a sand mixer used for manufacturing self-hardening sand; the at least one molding machine is used for compacting and molding the manufactured self-hardening sand for at least two times to form an upper sand mold and a lower sand mold; the first conveying assembly is arranged in the middle of the molding machine and used for conveying a sand box used for manufacturing the upper sand mold or the lower sand mold to a bottom mold of the molding machine and conveying the manufactured upper sand mold or the lower sand mold to the position above the pouring table; and the second conveying assembly and the first conveying assembly are located on the same conveying line, and the second conveying assembly is used for conveying the upper sand mold or the lower sand mold to the pouring table and enabling the upper sand mold to be positioned and placed on the lower sand mold. The first conveying assembly and the molding machine are tightly matched to complete manufacturing of an upper sand mold or a lower sand mold, the upper sand mold or the lower sand mold is directly conveyed to the second conveying assembly on the same conveying line, only the conveying direction of a sand box needs to be positioned, and manual operation can be reduced.

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 and flattened first, and then the vibrated and flattened sand in the mold box can be pressure molded. Thus, 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: a sand mixer for making self-hardening sand; at least one molding machine for at least twice compaction molding of the made self-hardening sand to form an upper sand mold and a lower sand mold; a first conveying assembly arranged in the middle of the molding machine for conveying a sand box used for making the upper sand mold or the lower sand mold to the bottom mold of the molding machine, and for conveying the made upper sand mold or lower sand mold to above the pouring table; a second conveying assembly arranged on the same conveying line as the first conveying assembly for conveying the upper sand mold or the lower sand mold to the pouring table and positioning the upper sand mold on the lower sand mold.

[0007] Preferably, the molding machine comprises: a first lifting mechanism arranged on the molding table, a second lifting mechanism arranged on the lifting platform of the first lifting mechanism, a compaction mechanism arranged at the bottom of the lifting platform, the first conveying assembly arranged at the lifting end of the second lifting mechanism, and the sand box arranged below the compaction mechanism; the bottom mold arranged on the molding table corresponding to the sand box, and the sand box placed on the bottom mold forms a sand injection space; a sand injection cylinder connected with the lifting end of the second lifting mechanism and arranged outside the compaction mechanism for injecting self-hardening sand into the sand injection space.

[0008] Preferably, the outer side of the bottom mold is provided with a positioning frame, and the molding table is provided with a third lifting mechanism for controlling the up-down movement of the positioning frame.

[0009] Preferably, the molding machine is formed by twice compaction molding, comprising: when injecting self-hardening sand, the positioning frame moves 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; when performing the first compaction, the compaction mechanism moves downward to compact the self-hardening sand, and when reaching a first set pressure or the compaction mechanism moves to a first compaction position, the compaction is stopped; when performing the second compaction, the compaction mechanism moves 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; wherein the second contact position is that the bottom surface of the sand box is flush with the top plane of the bottom mold.

[0010] 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.

[0011] Preferably, the first conveying assembly comprises two first conveying belts arranged on the two first mounting plates by a first driving member, and a plurality of first limiting teeth corresponding to the limiting tooth grooves are arranged on the first conveying belts, and the two overlapping portions of the sand box are positioned and placed on the two first conveying belts respectively.

[0012] Preferably, the second conveying assembly comprises: 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; a rotating module arranged at the lifting end of the lifting module and driven by the lifting module to move up and down; two conveying belt groups connected with the two rotating modules respectively, and the two overlapping portions of the sand box are positioned and placed on the two conveying belt groups respectively, and the conveying belt groups are driven by the rotating modules to be vertically flipped by 180 degrees.

[0013] Preferably, the conveying belt group comprises two second conveying belts arranged in an upper and lower interval, two supporting wheels and two third conveying belts, the second conveying belts, the supporting wheels and the third conveying belts are arranged on a second mounting plate by a second driving member, a conveying gap is formed between the two second conveying belts, the two supporting wheels and the two third conveying belts, and the overlapping portion of the sand box is limited at the conveying gap.

[0014] 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.

[0015] Compared with the prior art, the present application at least has the following beneficial effects: The large gearbox body combined casting equipment can closely cooperate with the molding machine to complete the production of the upper sand mold or the lower sand mold through the first conveying assembly, and can directly convey the produced upper sand mold or lower sand mold on the same conveying line to the second conveying assembly, and automatically convey the formed upper sand mold and lower sand mold to the pouring table through the second conveying assembly. The first conveying assembly and the second conveying assembly cooperate with any positioning mode, only need to position the conveying direction of the sand box, ensure the positioning accuracy, make the molding machine closely cooperate with the first conveying assembly and the second conveying assembly, reduce the manual operation, use the molding machine to compact at least twice, can ensure the strength of the formed upper sand mold and lower sand mold, thereby preventing deformation and other conditions during subsequent pouring, and improving the size accuracy of the casting.

[0016] The large gearbox body combined casting equipment, other advantages, objects and features 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

[0017] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of the specification, illustrate embodiments of the application and are included to provide a further understanding of the application, and are made a part of the specification. In the drawings: Figure 1 Structure schematic diagram of large gearbox housing combined casting equipment according to the present application; Figure 2 Structure schematic diagram of sand mixer and molding machine in large gearbox housing combined casting equipment according to the present application; Figure 3 Structure schematic diagram of internal structure of molding machine in large gearbox housing combined casting equipment according to the present application; Figure 4 Structure schematic diagram of molding machine in large gearbox housing combined casting equipment according to the present application when injecting self-hardening sand; Figure 5 Structure schematic diagram of molding machine in large gearbox housing combined casting equipment according to the present application when injecting self-hardening sand is completed; Figure 6 Structure schematic diagram of molding machine in large gearbox housing combined casting equipment according to the present application when performing first compaction; Figure 7 Structure schematic diagram of molding machine in large gearbox housing combined casting equipment according to the present application when performing second compaction; Figure 8 Structure schematic diagram of first conveying belt in large gearbox housing combined casting equipment according to the present application; Figure 9 Structure schematic diagram of sand box in large gearbox housing combined casting equipment according to the present application; Figure 10 Structure schematic diagram of sand box in large gearbox housing combined casting equipment according to the present application when being supported on conveying assembly; Figure 11 Structure schematic diagram of sand box in large gearbox housing combined casting equipment according to the present application when being supported on second conveying assembly; Figure 12 Structure schematic diagram of first conveying assembly conveying lower sand mold in large gearbox housing combined casting equipment according to the present application; Figure 13 Structure schematic diagram of second conveying assembly supporting lower sand mold in first working state in large gearbox housing combined casting equipment according to the present application; Figure 14 Structure schematic diagram of second conveying assembly when turning lower sand mold by 180 degrees in large gearbox housing combined casting equipment according to the present application; Figure 15This is a schematic diagram of the structure of the first conveying component conveying the sand mold in the large gearbox housing combined casting equipment of the present invention; Figure 16 This is a schematic diagram of the structure of the second conveying component in the large gearbox housing casting equipment of the present invention, which receives the upper sand mold in the second working state.

[0018] In the attached 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 conveyor 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 transverse module, 52 is a lifting module, 53 is a rotating module, 54 is a conveyor belt group, 55 is a second conveyor belt, 56 is a support wheel, 57 is a third conveyor 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 platform, 9 is a second lifting mechanism, 10 is a compaction mechanism, 11 is a sand box, 111 is an overlap part, 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 Implementation

[0019] 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.

[0020] 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.

[0021] like Figures 1-3 As shown, the present invention provides a large gearbox housing assembly casting equipment, comprising: Sand mixer 1, used to produce self-hardening sand; 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; 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. 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 platform 3 and to position the upper sand mold on the lower sand mold.

[0022] It also includes: a receiving and conveying component 15, which is disposed between the first conveying component 4 and the second conveying component 5.

[0023] Self-hardening sand is molding sand that can harden itself by adding resin or curing agent during the casting process.

[0024] 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. 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 table 3. 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. 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] The first driving member is used for driving the rotation of the pulley of the first conveying belt 41 to drive the movement of the first conveying belt 41, and the first mounting plate 42 is connected with the lifting end of the second lifting mechanism 9 of the molding machine 2 to cooperate with the work of the molding machine 2; the two lap portions 111 of the sand box 11 are respectively placed on the two first conveying belts 41, so that the limiting tooth grooves 112 are engaged with the first limiting teeth 411 on the first conveying belt 41 to ensure the stability of the sand box 11 during the conveying process.

[0032] As shown in the drawings, in one embodiment, the second conveying assembly 5 comprises: Figure 13 two horizontal moving modules 51, each of which is provided with a lifting module 52, and the horizontal moving module 51 is used for driving the horizontal movement of the lifting module 52; a rotating module 53 arranged at the lifting end of the lifting module 52, which is driven by the lifting module 52 to move up and down; two conveying belt groups 54 respectively connected with the two rotating modules 53, and the two lap portions 111 of the sand box 11 are respectively positioned and placed on the two conveying belt groups 54, and the conveying belt groups 54 are driven by the rotating modules 53 to be vertically flipped by 180 degrees. The horizontal moving module 51, the lifting module 52 and the rotating module 53 can all be driven by a pneumatic cylinder;

[0033] As shown in the drawings, when the first conveying assembly 4 is conveying the lower sand mold, the height of the two conveying belt groups 54 is adjusted by the lifting module 52 to receive the lower sand mold, and the second conveying assembly 5 receives the lower sand mold in the first working state as shown in the drawings; As shown in the drawings, when the first conveying assembly 4 is conveying the lower sand mold, the height of the two conveying belt groups 54 is adjusted by the lifting module 52 to receive the lower sand mold, and the second conveying assembly 5 receives the lower sand mold in the first working state as shown in the drawings; Figure 12 As shown in the drawings, when the first conveying assembly 4 is conveying the lower sand mold, the height of the two conveying belt groups 54 is adjusted by the lifting module 52 to receive the lower sand mold, and the second conveying assembly 5 receives the lower sand mold in the first working state as shown in the drawings; Figure 13 As shown in the drawings, when the first conveying assembly 4 is conveying the lower sand mold, the height of the two conveying belt groups 54 is adjusted by the lifting module 52 to receive the lower sand mold, and the second conveying assembly 5 receives the lower sand mold in the first working state as shown in the drawings; Figure 14 As shown in the drawings, when the first conveying assembly 4 is conveying the lower sand mold, the height of the two conveying belt groups 54 is adjusted by the lifting module 52 to receive the lower sand mold, and the second conveying assembly 5 receives the lower sand mold in the first working state as shown in the drawings; As shown in the drawings, when the first conveying assembly 4 is conveying the lower sand mold, the height of the two conveying belt groups 54 is adjusted by the lifting module 52 to receive the lower sand mold, and the second conveying assembly 5 receives the lower sand mold in the first working state as shown in the drawings; Figure 15 As shown in the drawings, when the first conveying assembly 4 is conveying the lower sand mold, the height of the two conveying belt groups 54 is adjusted by the lifting module 52 to receive the lower sand mold, and the second conveying assembly 5 receives the lower sand mold in the first working state as shown in the drawings; Figure 16The second working state shown receives the upper sand mold, when the upper sand mold is conveyed to the upper side of the lower sand mold, the conveying belt group 54 is driven by the lifting module 52 to move downward, the sand box 11 is placed on the sand box 11 of the lower sand mold, and then the two conveying belt groups 54 are moved away from each other by the horizontal moving module 51, so that the conveying belt group 54 is separated from the sand box 11, and the placement of the upper sand mold is completed.

[0034] Through the above technical scheme, when the sand box 11 needs to be turned over, the conveying belt group 54 is turned over as a whole by the rotating module 53, and when the sand box 11 does not need to be turned over, the second conveying assembly 5 can receive the sand box 11 in the second working state.

[0035] As shown in Figure 11 and Figure 13 Further, the conveying belt group 54 comprises two second conveying belts 55, two supporting wheels 56 and two third conveying belts 57 arranged in an upper and lower interval, the second conveying belt 55, the supporting wheel 56 and the third conveying belt 57 are arranged on the second mounting plate 58 through the second driving member, the conveying gap 50 is formed between the two second conveying belts 55, the two supporting wheels 56 and the two third conveying belts 57, and the overlapping part 111 of the sand box 11 is limited at the conveying gap 50.

[0036] Further, the second conveying belt 55, the supporting wheel 56 and the third conveying belt 57 are each provided with a plurality of second limiting teeth 59 corresponding to the limiting tooth groove 112.

[0037] As shown in Figure 10 and Figure 11 The receiving conveying assembly 15 is arranged upstream of the second conveying assembly 5, and the receiving conveying assembly 15 also comprises a horizontal moving module 51 and a lifting module 52, and further comprises a third mounting plate arranged on the lifting module 52, the third mounting plate is provided with a fourth conveying belt through a third driving member, and the fourth conveying belt is provided with third limiting teeth corresponding to the limiting tooth groove 112.

[0038] After the sand box 11 is conveyed to the receiving conveying assembly 15 by the first conveying assembly 4, the third limiting teeth on the fourth conveying belt of the receiving conveying assembly 15 are engaged with the limiting tooth grooves 112 on the sand box 11, and then the sand box 11 is conveyed to the conveying gap 50 of the second conveying assembly 5 by the receiving conveying assembly 15, so that the limiting tooth grooves 112 on the upper and lower sides of the sand box 11 are engaged with the second limiting teeth 59 above and below, respectively. When the middle part of the sand box 11 moves to the supporting wheel 56, that is, moves to the overturning position, the conveying belt group 54 can effectively support the sand box 11 at this time to overturn the sand box 11 by 180 degrees. During the overturning process of the sand box 11, the position of the sand box 11 can be limited and fixed by the engagement of the limiting tooth grooves 112 and the second limiting teeth 59, so as to prevent falling and other situations. The supporting wheel 56 can form strong support for the middle part of the sand box 11 to ensure the clamping strength of the sand box 11.

[0039] As shown in Figure 3 In one embodiment, the molding machine 2 comprises: The first lifting mechanism 8 is arranged on the molding table 7, the second lifting mechanism 9 is arranged on the lifting table 81 of the first lifting mechanism 8, the compaction mechanism 10 is arranged at the bottom of the lifting table 81, the first conveying assembly 4 is arranged at the lifting end of the second lifting mechanism 9, and the sand box 11 is arranged below the compaction mechanism 10. The bottom mold 6 is arranged on the molding table 7 and corresponds to the sand box 11. After the sand box 11 is placed on the bottom mold 6, the sand box 11 forms a sand injection space. The sand injection cylinder 12 is connected with the lifting end of the second lifting mechanism 9 and is arranged outside the compaction mechanism 10, and is used for injecting self-hardening sand into the sand injection space.

[0040] The lower part of the sand injection cylinder 12 is an annular cylinder, the side close to the compaction mechanism 10 is provided with a spout, and the action end of the compaction mechanism 10 can move up and down. A plurality of air outlets are arranged on the inner ring wall and the outer ring wall of the annular cylinder of the sand injection cylinder 12, the air outlets are in communication with the outside compressed air, and are used for providing air with a certain pressure into the sand injection cylinder 12. At the same time, the feed inlet at the top of the sand injection cylinder 12 is in a sealed state, the air with pressure makes the self-hardening sand in the sand injection cylinder 12 float and be sprayed from the spout to the sand injection space under a certain pressure, so as to realize rapid sand injection. An exhaust port is further arranged on the bottom mold 6, and air can be discharged from the exhaust port during the sand injection process.

[0041] 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; 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.

[0042] 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.

[0043] 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. 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.

[0044] The specific compaction process is as follows: The molding machine 2 forms the product through two compaction processes, including: like Figure 4 As 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. 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; 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. 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. likeFigure 7 As shown, when the second compaction is performed, the third lifting mechanism 14 drives the positioning frame 13 to move downward simultaneously while the compaction mechanism 10 is moving downward from the first compaction position (achieved by moving downward through the first lifting mechanism 8), until the positioning frame 13 moves to the second contact position, and stops to continue compaction. The second contact position is that the bottom surface of the sand box 11 is flush with the top surface of the bottom mold 6.

[0045] When the first compaction is performed, pre-pressing is performed at a set pre-pressing pressure, which aims to make the top sand of the sand injection space flat to form an initially sealed sand surface, and the pressure is monitored in real time through the pressure sensor on the compaction mechanism 10; after the pre-pressing is completed, the compaction plate is driven to move downward by high-pressure air, the force formed by the high-pressure air in the air chamber above the compaction plate uniformly acts on the self-hardening sand in the entire sand injection space, and the pressure is monitored in real time through the pressure sensor to ensure that the applied force meets the first set compaction pressure; the first compaction operation can be performed in the form of instantaneous impact force of high-pressure air on the compaction plate, and after the impact is completed, the pressure is maintained for a set time to allow the pressure wave to fully propagate and attenuate in the compacted self-hardening sand, so as to ensure the compactness. When the second compaction is performed, the compaction mechanism 10 is driven to move downward by the first lifting mechanism 8, and the positioning frame 13 is synchronously driven to move downward, which aims to perform the second compaction at a relatively slow speed to improve the compactness 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.

[0046] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0047] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, they can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection or communication with each other; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0048] While embodiments of the application have been disclosed in connection with the above specification and drawings this description is not intended to limit the scope of the application and many modifications, enhancements, alternatives, and variations will become apparent to those skilled in the art from this disclosure. Accordingly, it is expressly intended that the description should not limit the application as defined by the following claims, but that this application be construed as including all modifications, enhancements, alternatives, and variations that fall within the scope of the claims.

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 casting table (3) and position the upper sand mold on the lower sand mold.

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 sand box (11) has overlapping parts (111) on both sides, and the upper and lower sides of the overlapping parts (111) are provided with multiple limiting grooves (112).

6. The large gearbox housing assembly casting equipment according to claim 5, characterized in that, 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).

7. The large gearbox housing assembly casting equipment according to claim 6, characterized in that, 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.

8. The large gearbox housing assembly casting equipment according to claim 7, 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).

9. The large gearbox housing assembly casting equipment according to claim 8, 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).

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