A cylinder core assembly jig and a method of use

Abstract

The present application relates to a kind of cylinder body group core mould and using method, the bottom plate of mould is fixed with base, and two guide rails are installed on the bottom plate;Six moving seats are installed on the guide rail, first moving seat and sixth moving seat place end head core, and second to fifth moving seat place bobbin core;First moving seat can move left and right on the bottom plate, and there are two limit positions of left side and right side respectively;First moving seat drives second moving seat to move by outer connecting rod, second moving seat drives third moving seat to move by inner connecting rod, and third moving seat drives fourth moving seat to move by outer connecting rod, and the position of first, second and third moving seat is limited by bottom plate upper stopper on the bottom plate;Worker operability is good, sand core moving seat position is limited, and sand core is safely and reliably placed;It can effectively solve the group core technical problem caused by the thickness of sand core out of tolerance, and the group core mould has good adaptability.Cylinder body group core mould three cylinders and four cylinders can be shared, and cost is saved.

Description

Technical Field

[0001] This invention belongs to the field of casting technology and relates to a cylinder block core assembly jig and its usage method. Background Technology

[0002] On the automated production line in the foundry, the cylinder block casting process requires the use of a dip-coating robot to dip-coat the entire cylinder block sand core. Before the overall dip-coating, the front core, rear core, and cylinder core of the cylinder block need to be precisely assembled and fastened with bolts. Existing core assembly technology involves operators moving individual cores onto a core assembly jig, completing the core assembly on the jig, and then fastening the assembled cores with bolts.

[0003] In the existing technology, the core assembly tool is as follows Figure 1 , Figure 2 As shown, it mainly consists of the following components: base plate, guide rod support, guide rod, linear bearing, left end core cylinder end core seat, cylinder core moving seat, cylinder core fixed seat, cylinder core moving seat, right end core moving seat, right end core cylinder core end core seat, guide rod support, right end core crankshaft end core seat, cylinder core crankshaft end core seat, left end core moving seat, left end core crankshaft end core seat, left end core, cylinder core, and right end core. The function of each component can be seen from its name. The left end core is positioned on the left end core moving seat by the positioning of the left end core cylinder core seat and the left end core crankshaft end core seat. The left end core moving seat slides on the guide rod without any limit. All moving seats operate on the same principle. During core assembly, after pulling each moving seat outwards by a certain distance, first place a cylinder core on the cylinder core fixed seat, and then place the end core and other cylinder cores on their respective moving seats. After placement, the operator pushes the left and right end core moving seats to ensure each sand core is tightly packed together. Then, bolts are inserted to complete the core assembly. This assembly process shows that while the cylinder core and end cores can be positioned on their respective moving seats, which can slide on the guide rod, the lack of defined positions for the moving seats when placing individual sand cores causes operational inconvenience and safety risks. Furthermore, even with bolts inserted, the moving seats lack defined positions. During assembly, the tightening force of the bolts moves each sand core, which in turn moves the moving seats to complete the assembly. This assembly method carries the risk of sand core collisions, wear, or gaps between sand cores, potentially leading to deviations in the overall core length dimensions.

[0004] Of course, if each moving seat is equipped with limit switches for placing sand cores and for inserting bolts, new problems will arise. Because the thickness of the front core, rear core, and cylindrical core will have certain errors during sand core production, the dimensions after core assembly will be slightly longer or shorter than the theoretical value. Such limit switches may also lead to collision damage to the sand cores or gaps between the sand cores.

[0005] In addition, the existing core assembly fixtures cannot be used for both three-cylinder and four-cylinder blocks.

[0006] Patent document CN201910042246.8 discloses a cylinder block core assembly jig for assembling casting sand cores. The jig includes a worktable, end core supports, and an intermediate support. At least two sets of end core supports are provided on the worktable, and the end core supports are slidably mounted on the worktable. The intermediate support is located in the middle of the end core supports and is fixedly mounted to the worktable. The worktable consists of a mounting bracket, a mounting plate, a slide rail, a magnetic fixing block, a limiting block, and end core seats. The mounting bracket is mounted on the lower end of the mounting plate. The slide rail is mounted at both ends in the width or length direction of the mounting plate and is slidably mounted together with the end core seats. The limiting blocks are mounted on both sides of the slide rail closest to the intermediate support, and the magnetic fixing blocks are mounted on the end of the slide rail furthest from the intermediate support. This invention discloses a cylinder block core assembly jig that improves the assembly efficiency and accuracy of sand cores and enhances the quality of castings.

[0007] The aforementioned patent document is similar to existing core assembly jigs, where the position of the movable seat is uncontrollable when the bolts are in place.

[0008] Patent document CN202210522841.3 provides a core assembly fixture and a method for using the core assembly fixture in the vertical casting process of cylinder block casting. The core assembly fixture for the vertical casting process of cylinder block casting includes: a base plate; a side core assembly support member disposed on the base plate; a side core positioning component disposed on the side core assembly support member, the side core positioning component having a side core assembly positioning position; a crankcase core assembly support member disposed on the base plate; and a crankcase core assembly positioning component disposed on the crankcase core assembly support member, the side core positioning component having a crankcase assembly positioning position. The core assembly fixture for the vertical casting process of cylinder block casting of this application, by setting crankcase assembly positioning positions and side core assembly positioning positions, positions the crankcase core assembly and side core assembly by defining specific positions, facilitating the installation of each individual crankcase core in the crankcase core assembly and the assembly of the crankcase core assembly and the side core assembly, and eliminating errors in sand cores and coatings.

[0009] The aforementioned patent documents adjust the size of the sand core positioning point, while this application adjusts the position of the moving seat.

[0010] Patent document CN202020409774.0 discloses a sand core assembly process equipment, including a base with a positioning sleeve installed at the edge of the base; it also includes: a main core positioning baffle fixed to the base with hexagonal screws; a track fixed to the base with hexagonal screws, consisting of two parallel single tracks forming a set; a sliding plate mounted on the track via a sliding rail; a water jacket core positioning baffle fixed to the sliding plate with hexagonal screws; and a cylinder fixed to the base with hexagonal screws, the cylinder output end connected to the water jacket core positioning baffle via a cylinder connecting rod. This utility model designs a core assembly process equipment based on the structure of the core clamp, which can accurately combine the water jacket core and the main core of the cylinder body, and can use the clamp to remove the sand core into the sand mold. It saves manpower and resources, avoids sand core collisions, and allows the automated production line to operate efficiently.

[0011] The aforementioned patent documents utilize cylinders to achieve movement, while this application describes manual assembly of the core. Summary of the Invention

[0012] The technical problem to be solved by the present invention is to overcome the above-mentioned problems existing in the prior art and to provide a cylinder block core die.

[0013] This invention primarily provides a cylinder block core assembly jig and its usage method. By defining the initial position and the post-assembly position of the movable seat for placing the sand core, and by using a magnet and a magnet adjusting bolt that can adjust the position of the magnet, it solves two problems existing in the prior art:

[0014] 1) When placing the sand core, the movable seat where the sand core is located is uncontrollable, and the sliding causes inconvenience and safety issues.

[0015] 2) When the cores are bolted in place, there may be gaps between them, which may cause the core length dimensions to exceed the tolerance.

[0016] This invention also achieves cost savings by using a clever structural design that allows the three-cylinder and four-cylinder cylinder blocks to share the same core assembly, eliminating the need for a separate core assembly kit.

[0017] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0018] To solve the above-mentioned technical problems, the present invention is implemented using the following technical solution:

[0019] A cylinder block core jig includes a base frame 2, a base plate 3, and guide rails; the base plate 3 is fixed to the base frame 2, and two guide rails are installed on the base plate 3.

[0020] Six movable seats are installed on the guide rail, namely the first movable seat, the second movable seat, the third movable seat, the fourth movable seat, the fifth movable seat, and the sixth movable seat; the first movable seat and the sixth movable seat hold the end core, and the second to fifth movable seats hold the cylinder core; the first movable seat can move left and right on the base plate, with two extreme positions on the left and right sides respectively.

[0021] Furthermore, the first movable seat includes a first lower plate 6, a first upper plate 7, and a magnetic adjustment block 16;

[0022] The first lower plate 6 is equipped with a slider 24. Through the combination of the slider and the guide rail, the first lower plate 6 can move laterally.

[0023] The first upper plate 7 and the first lower plate 6 are positioned and fixed by positioning pins 23;

[0024] The first upper plate 7 is equipped with positioning components for two sets of cylinder block end caps;

[0025] One set of positioning components consists of a first plate limiting block 32, a first plate limiting block first insert 33, a first plate limiting block first stop 30, and a first plate limiting block first gasket 31;

[0026] Another set of positioning components consists of a first plate limiting block second baffle 37, a first plate limiting block second gasket 38, and a first plate limiting block second insert 39;

[0027] Two movable plate upper limit blocks 18 are installed on the bottom surface of the first lower plate 6. Correspondingly, two bottom plate stop blocks 14 are installed on each of the left and right sides of the bottom plate 3. The control components are activated through the contact between the limit blocks and the stop blocks.

[0028] The extreme position on the left or right side of the first lower plate 7;

[0029] The stop block 14 on the base plate is connected to the magnet adjustment block 16 via the magnet adjustment bolt 15. The magnet adjustment block 16 is fitted with the magnet 17 via an interference fit. The position of the magnet adjustment block 16 and the magnet 17 installed on it can be adjusted by adjusting the magnet adjustment bolt 15, thereby adjusting the extreme positions of the left and right sides of the first lower plate 6.

[0030] Furthermore, the second and third movable seats work on the same principle as the first movable seat; the fourth, fifth, and sixth movable seats have one less upper plate than the first movable seat, and their limiting principle is the same as that of the first movable seat.

[0031] Furthermore, a set of plate spacing limiting blocks is installed on the first lower plate 6 of the first movable seat, and a set of plate spacing limiting blocks is also installed on the second lower plate 8. The two plate spacing limiting blocks are connected by an external connecting rod, and the plate spacing limiting blocks can slide on the external connecting rod 5. A connecting rod retaining ring 4 is installed on the external connecting rod 5. When the first lower plate 6 is pulled open, the distance between the first lower plate and the second lower plate increases. When the plate spacing limiting block 40 contacts the connecting rod retaining ring 4, the right shoulder of the external connecting rod pushes the second lower plate 8 to move to the left, thus achieving...

[0032] The first movable seat drives the second movable seat to move; when the second movable seat moves a certain distance,

[0033] The second movable seat drives the third movable seat to move via the inner connecting rod. When the third movable seat moves to a certain distance, it drives the fourth movable seat to move via the outer connecting rod.

[0034] A method for using a cylinder block core jig involves pulling apart a first movable seat, which then moves a second movable seat via an outer connecting rod. The second movable seat moves a third movable seat via an inner connecting rod, and the third movable seat moves a fourth movable seat via an outer connecting rod. When the first, second, and third movable seats are separated to a certain distance, the first movable seat is positioned by a stop block on the bottom plate. Simultaneously, the second movable seat is positioned by a stop block on the bottom plate, and the third movable seat is positioned by a stop block on the bottom plate.

[0035] Furthermore, the attraction of magnets installed on each stop on the base plate ensures that the first, second, and third moving seats will not slide when the sand core is placed on the moving seat.

[0036] Furthermore, after each sand core is placed into its respective moving seat, the operator pushes the first moving seat inward toward the center of the fixture;

[0037] The first moving seat moves to the right, the first moving seat pushes the second moving seat, the second moving seat pushes the third moving seat. When the limiting blocks of each moving seat are about to approach the stop block on the bottom plate, due to the attraction of the magnet, each moving seat sits in a fixed position, ensuring the precise position of each sand core on the jig when the bolt is in the through state.

[0038] Furthermore, the working principles of the sixth, fifth, and fourth movable seats are the same as those of the first, second, and third movable seats.

[0039] Furthermore, when the thickness of the end core or the cylindrical core is out of tolerance, adjust the magnet adjusting bolts on each stop block, change the position of the magnet adjusting block, adjust the position of each moving seat, eliminate the influence of the size problem of the cylindrical core and the end core on the sand core positioning, and solve the problem of sand core collision and the problem of core assembly size being out of tolerance.

[0040] Furthermore, when assembling the core for a three-cylinder block, the third upper plate 12 on the third moving seat needs to be removed, the second upper plate 9 on the second moving seat needs to be moved to the third moving seat, and the first upper plate 7 on the first moving seat needs to be moved to the second moving seat. When assembling the core for a three-cylinder block, the left end core is placed on the second moving seat, the cylindrical core is placed on the third moving seat, the cylindrical core is placed on the fourth moving seat, and the right end core is placed on the fifth moving seat. The first moving seat is not needed. The principle of assembling the core for a three-cylinder block is the same as that of assembling the core for a four-cylinder block.

[0041] Compared with the prior art, the beneficial effects of the present invention are:

[0042] 1) It is easy for workers to operate, the position of the sand core moving seat is limited, and the placement of sand cores is safe and reliable;

[0043] 2) It can effectively solve the core assembly technical problems caused by the excessive thickness of the sand core, and the core assembly jig has good adaptability.

[0044] 3) It can achieve the use of the cylinder block core mold for both three-cylinder and four-cylinder cylinders, saving costs. Attached Figure Description

[0045] The invention will now be further described with reference to the accompanying drawings:

[0046] Figure 1 Axonometric view of a core assembly jig without sand cores in the prior art;

[0047] Figure 2 Axonometric view of a core assembly jig for placing sand cores using existing technology;

[0048] Figure 3 A cross-sectional view of a cylinder block core jig described in this invention. Figure 1 ;

[0049] Figure 4 A cross-sectional view of a cylinder block core jig described in this invention. Figure 2 ;

[0050] Figure 5 The cylinder block core die axial side of the present invention Figure 1 ;

[0051] Figure 6 The cylinder block core die of the present invention has some parts removed from the shaft side. Figure 1 ;

[0052] Figure 7The cylinder block core die of the present invention has some parts removed from the shaft side. Figure 2 ;

[0053] In the picture:

[0054] 1. Push handle;

[0055] 2. Base frame;

[0056] 3. Base plate;

[0057] 4. Connecting rod retaining ring;

[0058] 5. External connecting rod;

[0059] 6. First step;

[0060] 7. First board;

[0061] 8. Second lower plate;

[0062] 9. The second upper board;

[0063] 10. Inner connecting rod;

[0064] 11. Third lower plate;

[0065] 12. The third upper board;

[0066] 13. Connecting rod seat;

[0067] 14. Stop block on the base plate;

[0068] 15. Magnet adjusting bolt;

[0069] 16. Magnetic adjusting block;

[0070] 17. Magnet;

[0071] 18. Upper limit block for the moving plate;

[0072] 19. Fourth board;

[0073] 20. The fifth board;

[0074] 21. The sixth board;

[0075] 22. Positioning sleeve;

[0076] 23. Positioning pin;

[0077] 24. Slider;

[0078] 25. Guide rail;

[0079] 26. Guide sleeve;

[0080] 27. Sand core placement rack;

[0081] 28. Hardwood blocks;

[0082] 29. Rubber pad;

[0083] 30. First plate limit block, first stop block;

[0084] 31. First gasket of the first plate limiting block;

[0085] 32. First plate limiting block;

[0086] 33. First plate limiting block, first insert;

[0087] 34. Second plate limiting block;

[0088] 35. Second plate limiting block insert;

[0089] 36. Pressure plate;

[0090] 37. First plate limiting block, second baffle;

[0091] 38. First plate limiting block, second gasket;

[0092] 39. First plate limiting block, second insert;

[0093] 40. Plate spacing limit block. Detailed Implementation

[0094] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this invention. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this invention, and should not be construed as limiting the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention. The embodiments of this invention will be described in detail below with reference to the accompanying drawings.

[0095] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not 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 limiting the scope of protection of this invention.

[0096] The present invention will now be described in detail with reference to the accompanying drawings:

[0097] See Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 The cylinder core die of this invention is mainly composed of the following components: push handle 1, base frame 2, base plate 3, connecting rod retaining ring 4, outer connecting rod 5, first lower plate 6, first upper plate 7, second lower plate 8, second upper plate 9, inner connecting rod 10, third lower plate 11, third upper plate 12, connecting rod seat 13, base plate stop block 14, magnet adjusting bolt 15, magnet adjusting block 16, magnet 17, upper limit block of moving plate 18, fourth plate, fifth plate 20, sixth plate 21, positioning sleeve 22, positioning pin 23. 24. Slider 25. Guide rail 26. Guide sleeve 27. Sand core placement rack 28. Hardwood pad 29. Rubber pad 30. First plate limiting block first stop 31. First plate limiting block first gasket 32. First plate limiting block first insert 33. Second plate limiting block 34. Second plate limiting block insert 35. Sleeve pressure plate 36. First plate limiting block second stop 37. First plate limiting block second gasket 38. First plate limiting block second insert 39. Plate spacing limiting block 40.

[0098] The base plate 3 is fixed to the base frame 2 with bolts, and two guide rails 25 are installed on the base plate 3. Six movable seats are installed on the guide rails, namely the first movable seat, the second movable seat, the third movable seat, the fourth movable seat, the fifth movable seat, and the sixth movable seat. The first movable seat and the sixth movable seat hold the end core, and the second to fifth movable seats hold the cylinder core. The first movable seat can move left and right on the base plate, with two extreme positions on the left and right sides.

[0099] The relationship between the parts on the first movable seat and their working principle are as follows:

[0100] The lower plate 6 is bolted to a slider 24. The lower plate 6 can move laterally via the combination of the slider and guide rail. A push handle 1 is also bolted to the lower plate 6. The upper plate 7 is positioned and connected to the lower plate 6 via a positioning pin 23 and secured with two bolts. The upper plate 7 is bolted to two sets of positioning components for the cylinder head core. One set of positioning components consists of a first plate limiting block 32, a first plate limiting block first insert 33, a first plate limiting block first stop 30, and a first plate limiting block first washer 31. The other set of positioning components consists of a first plate limiting block second stop 37, a first plate limiting block second washer 38, and a first plate limiting block second insert 39. The lateral movement of the lower plate 6 is limited to the left and right sides. A set of two limiting blocks (moving plate upper limiting block 18) is installed on the bottom surface of the lower plate 6; correspondingly, a set of two stops (bottom plate stop 14) is installed on each of the left and right sides of the base plate 3. The left or right extreme positions of the first lower plate 6 are controlled by the contact between the limiting block and the stop block. The stop block 14 on the base plate is connected to the magnet adjusting block 16 via the magnet adjusting bolt 15, and the magnet adjusting block 16 is fitted with the magnet 17 via an interference fit. The position of the magnet adjusting block 16 and the magnet 17 mounted on it can be adjusted by adjusting the magnet adjusting bolt 15, thereby adjusting the left and right extreme positions of the first lower plate 6.

[0101] The second and third movable seats operate on the same principle as the first movable seat. The fourth, fifth, and sixth movable seats are structurally different from the first movable seat except that they lack an upper plate, and their limiting principle is the same as that of the first movable seat.

[0102] A set of plate spacing limiting blocks 40 is installed on the first lower plate 7 of the first movable seat, and a set of plate spacing limiting blocks 40 is also installed on the second lower plate 9. The two plate spacing limiting blocks are connected by an outer connecting rod, and the plate spacing limiting blocks can slide on the outer connecting rod 5. A connecting rod retaining ring 4 is installed on the outer connecting rod 5. When the first lower plate 7 is pulled open, the distance between the first lower plate and the second lower plate increases. When the plate spacing limiting block 40 contacts the connecting rod retaining ring 4, the right shoulder of the outer connecting rod pushes the second lower plate 9 to move to the left, thus realizing the movement of the first movable seat driving the second movable seat. When the second movable seat moves to a certain distance, the second movable seat drives the third movable seat to move through the inner connecting rod. When the third movable seat moves to a certain distance, the third movable seat drives the fourth movable seat to move through the outer connecting rod.

[0103] The following describes the working process of the core assembly fixture of this invention, using a four-cylinder block core assembly as an example. The operator pulls the push handle 1, opening the first moving seat. The first moving seat moves the second moving seat via an outer connecting rod. The second moving seat moves the third moving seat via an inner connecting rod. The third moving seat moves the fourth moving seat via an outer connecting rod. When the first, second, and third moving seats are separated to a certain distance, the first moving seat is positioned by a stop block (stop block 14 on the base plate). Simultaneously, the second moving seat is positioned by a stop block (stop block 14 on the base plate), and the third moving seat is positioned by a stop block (stop block 14 on the base plate). The attraction of the magnets installed on each stop block on the base plate ensures that the first, second, and third moving seats will not slide when a sand core is placed on the moving seat. After each sand core is placed on its respective moving seat, the operator pushes the first moving seat inward towards the center of the fixture. The first moving seat moves to the right, pushing the second moving seat, which in turn pushes the third moving seat. When the limiting blocks of each moving seat are about to approach the stop block 14 on the base plate, the magnetic attraction causes each moving seat to settle into a fixed position, ensuring the precise position of each sand core on the fixture when bolted. The sixth, fifth, and fourth moving seats operate on the same principle as the first, second, and third moving seats. When the thickness of the end core or cylindrical core exceeds the tolerance, the magnetic adjusting bolts on each stop block can be adjusted to change the position of the magnetic adjusting block. This adjusts the position of each moving seat, eliminating the influence of the dimensions of the cylindrical core and end core on the sand core positioning, thus solving the problems of sand core collision and core assembly dimensional tolerances.

[0104] This invention relates to a cylinder block core assembly jig shared by both three-cylinder and four-cylinder cylinder blocks. The illustrated state shows the core assembly state for a four-cylinder cylinder block. When assembling a three-cylinder cylinder block, the third upper plate 12 on the third moving seat needs to be removed, the second upper plate 9 on the second moving seat needs to be moved to the third moving seat, and the first upper plate 7 on the first moving seat needs to be moved to the second moving seat. When assembling a three-cylinder cylinder block, the left end core is placed on the second moving seat, the cylindrical core on the third moving seat, the cylindrical core on the fourth moving seat, and the right end core on the fifth moving seat. The first moving seat is not used. The core assembly principle for three-cylinder cylinder blocks is the same as that for four-cylinder cylinder blocks.

[0105] This cylinder block core assembly jig achieves position limitation and adjustability of each moving seat through the structure of inner and outer connecting rods, the combination design of limiting blocks and magnets, and realizes a structural design that is universal for both three-cylinder and four-cylinder cylinder block core assemblies.

[0106] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be included within the scope of protection of the present invention. Furthermore, all content not described in detail in this specification is prior art known to those skilled in the art.

Claims

1. A core assembly jig for a cylinder, comprising a base frame (2), a base plate (3), and a guide rail; the base plate (3) is fixed to the base frame (2), characterized in that: The bottom plate (3) is provided with two guide rails; Six moving seats are arranged on the guide rails, which are respectively a first moving seat, a second moving seat, a third moving seat, a fourth moving seat, a fifth moving seat and a sixth moving seat; the first moving seat and the sixth moving seat are used for placing end cores, and the second to fifth moving seats are used for placing bobbin cores; the first moving seat can move left and right on the bottom plate and has two limit positions on the left side and the right side respectively; The first moving seat comprises a first lower plate (6), a first upper plate (7) and a magnet adjusting block (16); The first lower plate (6) is provided with a sliding block (24), and the first lower plate (6) can move horizontally through the combination of the sliding block and the guide rail; The first upper plate (7) is connected with the first lower plate (6) through a positioning pin (23) and is fixed; The first upper plate (7) is provided with two sets of positioning components of the cylinder block core; One set of the positioning components comprises a first plate limiting block (32), a first plate limiting block first insert block (33), a first plate limiting block first stop block (30) and a first plate limiting block first gasket (31); The other set of the positioning components comprises a first plate limiting block second stop block (37), a first plate limiting block second gasket (38) and a first plate limiting block second insert block (39); Two moving plate upper limiting blocks (18) are arranged on the bottom surface of the first lower plate (6), and correspondingly, two bottom plate stop blocks (14) are arranged on the left side and the right side of the bottom plate (3); the limit positions of the left side and the right side of the first lower plate (7) are controlled through the contact between the limiting blocks and the stop blocks; The bottom plate stop block (14) is connected with the magnet adjusting block (16) through a magnet adjusting bolt (15), the magnet adjusting block (16) is provided with a magnet (17) through interference fit, and the positions of the magnet adjusting block (16) and the magnet (17) mounted thereon are adjusted through the magnet adjusting bolt (15), so that the limit positions of the left side and the right side of the first lower plate (6) are adjusted.

2. The cylinder block core assembling jig according to claim 1, characterized in that: The second moving seat, the third moving seat and the first moving seat have the same working principle; the fourth moving seat, the fifth moving seat and the sixth moving seat are structurally provided with one less upper plate than the first moving seat, and have the same limiting principle as the first moving seat.

3. The cylinder block core assembling jig according to claim 2, characterized in that: A set of plate spacing limiting blocks are arranged on the first lower plate (6) of the first moving seat, and a set of plate spacing limiting blocks are also arranged on the second lower plate (8); the two sets of plate spacing limiting blocks are connected through an outer connecting rod, can slide on the outer connecting rod (5), and are provided with a connecting rod stop ring (4) on the outer connecting rod (5); when the first lower plate (6) is pulled apart, the distance between the first lower plate and the second lower plate becomes larger and larger; when the plate spacing limiting blocks (40) contact the connecting rod stop ring (4), the right end shoulder of the outer connecting rod pushes the second lower plate (8) to move left, so that the movement of the second moving seat is realized by the first moving seat; when the second moving seat moves to a certain distance, the second moving seat drives the third moving seat to move through an inner connecting rod; when the third moving seat moves to a certain distance, the third moving seat drives the fourth moving seat to move through an outer connecting rod.

4. The method of claim 3, wherein: the first moving seat is pulled apart, the first moving seat drives the second moving seat to move through the outer connecting rod, the second moving seat drives the third moving seat to move through the inner connecting rod, the third moving seat drives the fourth moving seat to move through the outer connecting rod, when the first moving seat, the second moving seat and the third moving seat are separated to a certain distance, the first moving seat is limited by the bottom block on the bottom plate, at the same time, the second moving seat is limited by the bottom block on the bottom plate, and the third moving seat is limited by the bottom block on the bottom plate; the first moving seat, the second moving seat and the third moving seat are prevented from sliding by the magnetic attraction of the magnets installed on the bottom blocks.

5. The method of claim 4, wherein: when each sand core is placed on the moving seat, the operator pushes the first moving seat to the center of the mold inwards; the first moving seat moves to the right, the first moving seat drives the second moving seat, the second moving seat drives the third moving seat, when the limiting blocks of the moving seats approach the bottom blocks, the moving seats are fixed in position due to the magnetic attraction, and the accurate positions of the sand cores on the mold are ensured when the bolts are inserted.

6. The method of claim 5, wherein: the working principles of the sixth moving seat, the fifth moving seat and the fourth moving seat are the same as those of the first moving seat, the second moving seat and the third moving seat.

7. The method of claim 6, wherein: when the thickness of the end core or the barrel core is out of tolerance, the magnetic adjustment bolts on the blocks are adjusted to change the positions of the magnetic adjustment blocks and the positions of the moving seats, so as to eliminate the influence of the size problems of the barrel core and the end core on the positioning of the sand core and solve the problems of sand core collision and core size out of tolerance.

8. The method of claim 7, wherein: when the three-cylinder cylinder is assembled, the third upper plate (12) on the third moving seat is removed, the second upper plate (9) on the second moving seat is moved to the third moving seat, and the first upper plate (7) on the first moving seat is moved to the second moving seat; when the three-cylinder cylinder is assembled, the left end core is placed on the second moving seat, the barrel core is placed on the third moving seat, the barrel core is placed on the fourth moving seat, the right end core is placed on the fifth moving seat, and the first moving seat is not used; the principle of assembling the three-cylinder cylinder is the same as that of assembling the four-cylinder cylinder.

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