Connecting and fastening device and method for combined sand core

Abstract

The invention relates to a connecting and fastening device and method for a combined sand core. The device comprises a discharging conveying station, a feeding rotary table, a robot, an automatic nailing machine, a box closing shuttling sliding table and an automatic packaging machine. The robot grabs the combined sand core and places the combined sand core on the box closing shuttling sliding table; the box closing shuttling sliding table is used for conveying the combined sand core into a robot working area; the robot grabs the combined sand core on the box closing shuttle sliding table to the automatic nailing machine and the automatic packaging machine for nailing and packaging; the robot puts the nailed and packaged combined sand core back to the box closing shuttling sliding table; the box closing shuttling sliding table conveys the nailed and packaged combined sand core into a robot working area, and the robot grabs the nailed and packaged combined sand core and places the nailed and packaged combined sand core to a discharging conveying station; according to the invention, the fastening cost of the combined sand core is reduced, and the efficiency of fastening automatic production is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of casting, and relates to a connection and fastening device and method for a combined sand core, and specifically to a connection and fastening device and method for a combined sand core for casting a diesel engine cylinder block and a cylinder head. Background Art

[0002] The existing assembly and locking methods of combined sand cores are mainly glue and nails for small-mass sand cores and structural design and locking screws for large-mass sand cores.

[0003] like Figure 1 As shown in the figure, the connection at No. 1 is a nail gun connection. Due to the strength of the casting sand core itself, the fastening force of the nail gun connection is very limited. When used on a larger sand core, the sand core at the nail gun is prone to cracking. The sand core combination is connected by glue. Because the amount of glue used is large, it is difficult to dry. If it is not dried, it will cause a large amount of gas to be generated during the pouring process, resulting in pores on the surface of the casting, affecting the quality of the casting. If the drying effect is achieved by extending the drying time, more natural gas and electricity will be consumed and the production cycle will be affected.

[0004] As shown in Figure 2, screw holes are reserved on the sand core, and the core screws are used to connect and lock the sand cores after assembly. However, the core screw purchase price is 4-8 yuan / piece, and 4 pieces are used in each box of assembled sand cores. After pouring molten iron, the high-temperature molten iron will come into contact with the screw threads, causing damage to the threads. The recycling rate is less than 10%, and the cost of use is high. The average cost of each box of fastening consumables is more than 24 yuan. Due to structural problems, the core screw cannot currently be fully automated and requires manual operation with hand tools. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the above-mentioned problems existing in the prior art and provide a connection and fastening device and method for a combined sand core, specifically a connection and fastening device and method for a combined sand core for casting a diesel engine cylinder block and cylinder head.

[0006] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0007] In order to solve the above technical problems, the present invention is implemented by adopting the following technical solutions:

[0008] A connection and fastening device for a combined sand core, comprising a material unloading and conveying station 7, a material loading rotary table 8, a robot 9, a box closing shuttle slide 11, and an automatic packing machine 12;

[0009] The robot grabs the combined sand core 15 and places it on the box-closing shuttle slide 11;

[0010] The box-closing shuttle slide 11 is used to transport the combined sand core 15 into the robot working area;

[0011] The robot grabs the combined sand core 15 on the box-closing shuttle slide 11 and takes it to the automatic packing machine 12 for packing;

[0012] The robot puts the packaged combined sand core 15 back to the box closing shuttle slide 11; the box closing shuttle slide 11 transports the packaged combined sand core 15 to the robot working area, and the robot grabs the packaged combined sand core 15 and places it to the unloading and conveying station 7.

[0013] Furthermore, a connection and fastening device for a combined sand core also includes an automatic nailing machine 10;

[0014] The robot grabs the combined sand core on the box-closing shuttle slide and sends it to the automatic packaging machine 12, and first sends it to the automatic nailing machine 10 for nailing; then, it is sent to the automatic packaging machine for packaging;

[0015] The robot puts the nailed and packaged combined sand core back to the box closing shuttle slide 11; the box closing shuttle slide transports the nailed and packaged combined sand core to the robot working area, and the robot grabs the nailed and packaged combined sand core and places it to the unloading and conveying station 7.

[0016] Furthermore, two robots are provided, namely robot a and robot b; robot a grabs the combined sand core 15, and places it on the box closing shuttle slide 11, the box closing shuttle slide 11 transports the combined sand core 15 to the working area of ​​robot b, and robot b grabs the combined sand core 15 on the box closing shuttle slide 11 and goes to the automatic nailing machine 10 and the automatic packaging machine 12 respectively to perform nailing and packaging work; after completion, the robot puts the combined sand core 15 back to the box closing shuttle slide 11; the box closing shuttle slide 11 transports the combined sand core 15 to the working area of ​​robot a, robot a grabs the combined sand core 15, and places it on the unloading and conveying station 7, the whole process ends, and the next cycle is carried out.

[0017] Furthermore, a connection and fastening device for a combined sand core also includes a drying furnace unloading roller 14, an electric single-beam suspension crane 13, and a loading turntable 8;

[0018] The sand core is transported by the unloading roller 14 of the drying furnace, and is manually transferred to the loading turntable 8 by the electric single-beam suspension crane 13. The loading turntable 8 rotates to transfer the sand core into the working area of ​​the robot. The robot grabs the sand core and completes the box assembly on the loading turntable 8. The assembled sand core is the combined sand core 15.

[0019] Furthermore, a strapping tape fixing groove 18 is reserved on the combined sand core, and the strapping tape is stuck in the strapping tape fixing groove.

[0020] Furthermore, the strapping tape is a PET strapping tape.

[0021] Furthermore, strapping belt fixing grooves are arranged at left and right ends of the combined sand core.

[0022] Furthermore, the strapping belt fixing groove is processed with an arc transition.

[0023] Furthermore, according to different production rhythms and products, several robots are set up, and robot combinations with different layouts are selected to adapt to production; the robots are responsible for handling work in the whole process. The robots are used to grab sand cores for box assembly, nailing, and packaging, and send the assembled sand cores to the box assembly shuttle slide and the unloading and conveying station.

[0024] A method for connecting and fastening a combined sand core, comprising:

[0025] Robot a grabs the combined sand core 15, places it on the box-closing shuttle slide 11, the box-closing shuttle slide 11 transports the combined sand core 15 to the working area of ​​robot b, robot b grabs the combined sand core 15 on the box-closing shuttle slide 11 to the automatic packaging machine 12 for packaging; robot b puts the combined sand core 15 back to the box-closing shuttle slide 11; the box-closing shuttle slide 11 transports the combined sand core 15 to the working area of ​​robot a, robot a grabs the combined sand core 15, places it on the unloading and conveying station 7, the whole process ends, and the next cycle is carried out.

[0026] Furthermore, robot b grabs the combined sand core on the box closing shuttle slide and sends it to the automatic packaging machine 12, first sends it to the automatic nailing machine 10 for nailing, and then sends it to the automatic packaging machine 12 for packaging; robot b puts the combined sand core back to the box closing shuttle slide; the box closing shuttle slide transports the combined sand core to the working area of ​​robot a, robot a grabs the combined sand core and places it at the unloading and conveying station, the whole process ends, and the next cycle is carried out.

[0027] Furthermore, the sand core is transported through the drying furnace unloading roller 14, and the electric single-beam suspension crane 13 transfers the sand core to the loading turntable 8. The loading turntable 8 rotates to transfer the sand core into the robot working area. The robot grabs the sand core and completes the box assembly on the loading turntable 8. The assembled sand core is the combined sand core 15.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] Through the present invention, fully automated production of combined cores with a total weight of more than 80 kg can be achieved, and the production process includes robot core assembly, transportation, lock core processes, etc.; except for manual loading and inspection during loading, the production process can release the manual work content of the lock core process, and the automated production can be completed completely by the cooperation of special machines and robots, and the consumable cost of the lock core screw is saved by 24 yuan / box, and the consumable cost of strapping tape and nails is about 1.2 yuan / box (PET strapping tape specification 1608, purchase price is about 180 yuan / roll, each roll is 1200 meters, sand core packaging ≤8 meters / box, and the converted cost is 1.2 yuan / box; the purchase price of nails is 100 yuan / 16000 pieces, each box of combined core uses ≤8 pieces, and the cost of each box is 0.05 yuan). BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below in conjunction with the accompanying drawings:

[0031] Figure 1 It is a schematic diagram of the connection of a casting sand core gun nail in the prior art;

[0032] Figure 2 It is a schematic diagram of the prior art sand core assembly and the use of a locking core screw to connect and lock;

[0033] Figure 3 An exploded view of the casting structure of the sand core assembly of a diesel engine cylinder head;

[0034] Figure 4 It is an assembly diagram of the connection and fastening method of the combined sand core of the present invention;

[0035] Figure 5 Schematic diagram of using PET or other forms of strapping tape and row nails, U-shaped nails to replace the locking screw;

[0036] Figure 6 Schematic diagram of the reserved strapping belt fixing slot;

[0037] Figure 7 The process flow chart of the core assembly and packing fastening method of the diesel engine cylinder head;

[0038] Figure 8 It is a three-dimensional layout diagram of the diesel engine cylinder head assembly, packaging and fastening equipment;

[0039] In the figure:

[0040] 1. Stapling;

[0041] 2. Cap core;

[0042] 3. End core;

[0043] 4. Locking screw;

[0044] 5. Cover the box core;

[0045] 6. Bottom box core;

[0046] 7. Unloading and conveying station;

[0047] 8. Loading turntable;

[0048] 9. Robots;

[0049] 10. Automatic nailing machine;

[0050] 11. Shuttle slide for box closing;

[0051] 12. Automatic packaging machine;

[0052] 13. Electric single-beam suspension crane;

[0053] 14. Drying furnace unloading roller;

[0054] 15. Combined sand core;

[0055] 16. PET packing tape;

[0056] 17. Gun nails between the cores of the cover and bottom plates;

[0057] 18. Reserve a fixing slot for the strapping tape. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical scheme and advantages of the implementation of the present invention clearer, the technical scheme in the embodiment of the present invention will be described in more detail below in conjunction with the drawings in the embodiment of the present invention. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. The embodiments of the present invention are described in detail below in conjunction with the drawings.

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0060] The present invention is described in detail below in conjunction with the accompanying drawings:

[0061] The present invention uses PET or other forms of strapping tape and row nails, U-shaped nails, etc. to replace the locking screw. The mold is modified at the corresponding position to ensure that there is a reserved fixing groove at the strapping position to guide the consistency of packaging. At the same time, the fixing groove is processed with an arc transition to enhance the force-bearing structure and increase the force-bearing strength.

[0062] PET is the abbreviation of Polyethylene terephthalate, which means in Chinese: Polyethylene terephthalate plastics, mainly including polyethylene terephthalate PET and polybutylene terephthalate PBT. Polyethylene terephthalate is also commonly known as polyester resin. It is a condensation product of terephthalic acid and ethylene glycol, and together with PBT, it is collectively called thermoplastic polyester, or saturated polyester.

[0063] The present invention uses the existing relatively mature combination solution of automatic baling machine and nail gun to replace the traditional solution of locking core screw, reduces the fastening cost of the combined sand core, and improves the efficiency of fastening automated production.

[0064] The nail gun method is not limited to row nails and U-shaped nails. In addition, by appropriately modifying the sand core structure, self-tapping screws can be used instead of nail guns and used in conjunction with a baling machine to achieve the same effect.

[0065] See also Figure 3 , Figure 4 , Figure 5 , Figure 6 The present invention provides an embodiment, a connection and fastening device for a combined sand core, comprising a material unloading and conveying station 7, a material loading turntable 8, a robot 9, a box closing shuttle slide 11, an automatic packing machine 12, an electric single-beam suspension crane 13, a drying furnace unloading roller 14, a combined sand core 15, a PET packing tape 16, a gun nail 17 between the cover and bottom plate cores, and a reserved packing tape fixing groove 18;

[0066] Two shuttle slides are set for box closing. The number of robots 9 is arranged according to the production rhythm. If the production rhythm is faster, more robots can be arranged.

[0067] According to different production rhythms and products, different layouts of robot combinations can be selected to adapt to production. That is, the robots are responsible for handling work throughout the whole process, such as grabbing sand cores, assembling them into boxes, nailing, packing, and sending them to the unloading station; or robot a grabs sand cores, puts them into boxes on the shuttle table (transition table), grabs the packed sand cores and sends them to the unloading station, and robot b grabs the assembled sand cores, nails, packs, and sends them to the shuttle table (transition table); the drying furnace unloading roller 14 is the front process, and the unloading and conveying station 7 is the back process.

[0068] The sand core is transported through the unloading roller 14 of the drying furnace, and the sand core is manually transferred to the loading turntable 8 through the electric single-beam suspension crane 13. The loading turntable 8 rotates to transfer the sand core into the working area of ​​robot a. Robot a grabs the sand core and completes the box assembly on the loading turntable 8. The assembled sand core is the combined sand core 15. Then robot a grabs the combined sand core 15 and places it on the box assembly shuttle slide 11. The shuttle slide 11 transports the combined sand core 15 to the working area of ​​robot b. Robot b grabs the combined sand core 15 on the box assembly shuttle slide 11 to the automatic packaging machine 12 for packaging. After completion, robot b puts the packaged combined sand core 15 back to the box assembly shuttle slide 11. The box assembly shuttle slide 11 transports the packaged combined sand core 15 to the working area of ​​robot a. Robot a grabs the packaged combined sand core 15 and places it on the unloading and conveying station 7. The whole process ends and the next cycle is carried out.

[0069] A connection and fastening device for a combined sand core provided by the present invention also includes an automatic nailing machine 10; before the robot b grabs the combined sand core 15 on the box-closing shuttle slide 11 to the automatic packaging machine 12 for packaging, the combined sand core 15 on the box-closing shuttle slide 11 grabbed by the robot b can be sent to the automatic nailing machine 10 for nailing, and then the nailed combined sand core is sent to the automatic packaging machine 12 for packaging, and then the robot puts the nailed and packaged combined sand core back to the box-closing shuttle slide; the box-closing shuttle slide transports the nailed and packaged combined sand core to the working area of ​​the robot a, and the robot a grabs the nailed and packaged combined sand core and places it in the unloading and conveying station, and the whole process ends and the next cycle is carried out.

[0070] See also Figure 7 , Figure 8 According to an embodiment of the present invention, a method for connecting and fastening a combined sand core comprises the following steps:

[0071] Step 1: The operator loads the cover box and the bottom box;

[0072] Step 2: The feeding turntable rotates 180 degrees;

[0073] Step 3: The handling robot grabs the cover box and turns it 180 degrees;

[0074] Step 4: The handling robot closes the cover box onto the bottom box and places the combined sand core on the box closing shuttle slide;

[0075] Step 5: Determine whether the combined sand core is 1 pair. If not, return to step 1. If yes, replace the fixture block with the corresponding fixture, and then the handling robot grabs the combined sand core to the automatic nailing workbench;

[0076] Step 6: After the signal of the nailing workbench is in place, the combined sand core is nailed.

[0077] Step 7. After nailing is completed, the robot moves the combined sand core to the automatic packaging area, puts one end of the sand core into the packaging machine, and the packaging machine performs packaging. After the robot moves the sand core back a short distance, it replaces the other end of the sand core and puts it into the packaging machine, and the packaging machine performs packaging. The packaging machine is a frame structure, such as Figure 8 In the process, the sand core is placed in the frame, and the strapping tape is automatically tied to the surface of the sand core in the same plane as the frame.

[0078] Step 8. After packaging is completed, the robot grabs the combined sand core and places it in the unloading station, and the sand core enters the next process.

[0079] During the entire nailing and packaging process, the robot always keeps gripping the sand core. Fine-tune the process according to different production rhythms and product requirements. When the robot grabs the sand core, it is fully occupied and cannot perform other work.

[0080] The embodiment provided by the present invention is a method for connecting and fastening a combined sand core, which can omit the nailing work, and the surface of the combined sand core is smoothed and can fit well. The handling robot grabs the combined sand core to the automatic packaging station, and one end of the sand core is placed in the packaging machine, and the packaging machine performs packaging; after the robot retreats the sand core a short distance, it replaces the other end of the sand core and places it in the packaging machine, and the packaging machine performs packaging; after packaging is completed, the robot grabs the combined sand core and places it in the unloading station, and the sand core enters the next process.

[0081] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any modification, equivalent replacement and improvement made by any person skilled in the art within the technical scope disclosed by the present invention and within the spirit and principle of the present invention shall be covered within the protection scope of the present invention. At the same time, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A connection and fastening device for a combined sand core, characterized in that: It includes unloading and conveying station, loading turntable, robot, box closing shuttle slide, and automatic packaging machine; The robot grabs the combined sand core and places it on the box-closing shuttle slide; The box-closing shuttle slide is used to transport the assembled sand cores to the robot's working area; The robot grabs the combined sand cores on the box-closing shuttle slide and takes them to the automatic packing machine for packing; The robot puts the packaged combined sand cores back to the box closing shuttle slide; the box closing shuttle slide transports the packaged combined sand cores to the robot's working area, and the robot grabs the packaged combined sand cores and places them at the unloading and conveying station.

2. A connection and fastening device for a combined sand core according to claim 1, characterized in that: Also included is an automatic nailing machine; The robot grabs the combined sand core on the shuttle slide and sends it to the automatic packaging machine for packaging. It is first sent to the automatic nailing machine for nailing; then, it is sent to the automatic packaging machine for packaging. The robot puts the nailed and packaged combined sand cores back to the box closing shuttle slide; the box closing shuttle slide transports the nailed and packaged combined sand cores to the robot's working area, and the robot grabs the nailed and packaged combined sand cores and places them at the unloading and conveying station.

3. The connection and fastening device of the combined sand core according to claim 2, characterized in that: Two robots are provided, namely robot A and robot B; robot A grabs the combined sand core and places it on the box closing shuttle slide, the box closing shuttle slide transports the combined sand core to the working area of ​​robot B, robot B grabs the combined sand core on the box closing shuttle slide and respectively goes to the automatic nailing machine and the automatic packaging machine to perform nailing and packaging work; the robot puts the combined sand core back to the box closing shuttle slide; the box closing shuttle slide transports the combined sand core to the working area of ​​robot A, robot A grabs the combined sand core and places it on the unloading and conveying station, the whole process ends, and the next cycle is carried out.

4. A connection and fastening device for a combined sand core according to claim 1 or 2, characterized in that: It also includes a drying furnace unloading roller table, an electric single-beam suspension crane, and a loading turntable; The sand core is transported by the unloading roller of the drying furnace, and is manually transferred to the loading turntable by the electric single-beam suspension crane. The loading turntable rotates to transfer the sand core into the working area of ​​the robot. The robot grabs the sand core and completes the box assembly on the loading turntable. The assembled sand core is the combined sand core.

5. The connection and fastening device for a combined sand core according to claim 4, characterized in that: A strapping tape fixing groove is reserved on the combined sand core, and the strapping tape is clamped in the strapping tape fixing groove.

6. A connection and fastening device for a combined sand core according to claim 5, characterized in that: The packing tape is a PET packing tape.

7. The connection and fastening device for a combined sand core according to claim 5, characterized in that: The strapping tape fixing grooves are arranged at the left and right ends of the combined sand core; the strapping tape fixing grooves are processed with arc transition.

8. A connection and fastening device for a combined sand core according to claim 1 or 2, characterized in that: According to different production rhythms and products, several robots are set up, and robot combinations with different layouts are selected to adapt to production. The robots are responsible for handling work in the whole process. The robots are used to grab sand cores, combine boxes, nail, and pack, and send the combined sand cores to the combination shuttle slide and unloading conveying station.

9. A method for connecting and fastening a combined sand core, characterized in that: include: Robot a grabs the combined sand core and places it on the box closing shuttle slide. The box closing shuttle slide transports the combined sand core to the working area of ​​robot b. Robot b grabs the combined sand core on the box closing shuttle slide and takes it to the automatic packaging machine for packaging. Robot b puts the combined sand core back to the box closing shuttle slide. The box closing shuttle slide transports the combined sand core to the working area of ​​robot a. Robot a grabs the combined sand core and places it on the unloading and conveying station. The whole process ends and the next cycle begins.

10. A method for connecting and fastening a combined sand core according to claim 9, characterized in that: Robot b grabs the combined sand core on the box closing shuttle slide and brings it to the automatic baling machine, first sends it to the automatic nailing machine for nailing, and then sends it to the automatic baling machine for packaging; robot b puts the combined sand core back to the box closing shuttle slide; the box closing shuttle slide transports the combined sand core to the working area of ​​robot a, robot a grabs the combined sand core and places it at the unloading and conveying station, the whole process ends, and the next cycle begins.

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