Universal chain type hoisting device for dip-coating of sand core

Abstract

The invention relates to the technical field of casting machining, in particular to a universal chain type lifting device for sand core dip-coating. The supporting device is used for supporting the sand core at the bottom of the device; the limiting device is used for being matched with the bearing device to form a cage type structure and limiting and fixing the sand core; the connecting device is arranged on the bearing device and the limiting device and is used for connecting the bearing device with the limiting device; the locking device is arranged at the top of the limiting device, applies pressure to the sand core from top to bottom, and fixes the sand core in a cage type structure formed by matching the bearing device and the limiting device; the hoisting assembly is arranged at the top of the limiting device; after the sand core and the hoisting device are assembled to form an assembly, hoisting equipment is used for being connected with the hoisting assembly, and the assembly is hoisted into a coating system to be subjected to a dip-coating procedure; the separation phenomenon of a sand core in a dip-coating process is inhibited. The number of the square chain blocks is adjusted to cooperate with the locking device to apply pressure from top to bottom, so that the stability of the sand core is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of casting processing, in particular to a universal chain lifting device for sand core dipping. Background Art

[0002] With the progress of society, new energy related products and technologies are vigorously promoted; there is also a certain improvement in the products of the casting industry; the shape of traditional castings is relatively simple, and under the influence of the new energy environment and the requirements of structural process conditions, the structure of some castings is more complicated; in response to the demand for new energy products, castings have gradually developed from small-scale product castings to the production of medium and large-scale products. In this process, there are often some problems, which creates greater challenges in ensuring the product qualification rate.

[0003] There is a problem now, such as Figure 1 As shown in the figure, due to the large volume of the casting itself and the large internal cavity, if the upper and lower molds were used for direct molding, the processing cost would be greatly increased. Therefore, we adopted the internal sand core molding method. This can reduce production costs while ensuring the product size requirements. The hollow structure of the sand core also further reduces the weight of the sand core and the finished product. To ensure the convenience of employees, we also split the sand core into two and use a combined sand core method to reduce labor intensity.

[0004] However, for this sand core, it is necessary to coat the product before it is finally used to process the product, so as to improve the internal surface quality of the casting and smoothly demould it. Figure 7 The figure shows a traditional hoist. A special hoist needs to be customized for a single type of sand core, and the overall height of the hoist needs to be customized according to the height of the sand core. At the same time, in order to facilitate installation and lifting, a certain tolerance needs to be left. However, since the paint is placed in the paint liquid, the liquid itself has buoyancy. Due to the existence of tolerance, the assembled sand core will be unstable after being placed in the liquid paint, and there will be separation caused by loose adhesion, which poses a safety hazard.

[0005] Therefore, under this condition, in order to solve the quality problems and safety hazards that may exist during the assembly and transportation process, we have specially designed a coating device to facilitate employee operation and the integrity of the sand core, reduce employee labor intensity, and improve the qualified rate of casting production. Summary of the Invention

[0006] The purpose of the present invention is to address the problems existing in the background technology and propose a universal chain lifting device for sand core dipping to solve the problem that the hollow sand core in the background technology is prone to instability and separation during dipping.

[0007] The technical solution of the present invention, in a first aspect, provides a universal chain lifting device for sand core dipping, comprising:

[0008] A supporting device, used for supporting the sand core at the bottom of the device;

[0009] The limiting device is used to cooperate with the supporting device to form a cage structure to limit and fix the sand core;

[0010] A connecting device, provided on the supporting device and the limiting device, for connecting the supporting device and the limiting device together;

[0011] The locking device is arranged on the top of the limiting device, exerting pressure on the sand core from top to bottom, thereby fixing the sand core in the cage structure formed by the supporting device and the limiting device;

[0012] The lifting assembly is arranged on the top of the limiting device; after the sand core and the lifting device are assembled to form an assembly, the lifting equipment is used to connect the lifting assembly, and the assembly is lifted into the coating system for the dipping process; the separation of the sand core during the dipping process is suppressed.

[0013] Furthermore, the supporting device includes a base and a bottom plate;

[0014] The base is a ring-shaped support structure, the center of which is a cross structure with several openings.

[0015] The bottom plate is fixed on the base and cooperates with the base to expose the cross opening structure; several bolt fixing positions are reserved on the bottom plate;

[0016] A plurality of limit blocks fastened by bolts are arranged on the bottom plate; the limit blocks cooperate with the bottom of the sand core to form a limit structure to fix the sand core.

[0017] Furthermore, the cross opening structure on the supporting device is used for the coating to enter and dip-coat the bottom of the sand core.

[0018] Furthermore, the limiting device includes a second connecting ring, a plurality of square chain blocks and a first connecting ring;

[0019] The first connecting ring and the second connecting ring are both configured as annular members identical to the base; the first connecting ring serves as the bottom supporting structure of the limiting device and is connected to the supporting device in coordination, and is locked using the connecting device;

[0020] The second connecting ring is arranged parallel to and above the first connecting ring; a plurality of support beams are arranged in the middle of the second connecting ring; the plurality of support beams intersect at the center of the second connecting ring;

[0021] A plurality of square chain blocks are combined to form a chain group; the number of square chain blocks in each group is freely selected according to the height of the sand core; the plurality of chain groups are distributed in a circular array between the first connecting ring and the second connecting ring, and cooperate with the upper and lower connecting rings to form a cage-type limiting structure.

[0022] Furthermore, the square chain block includes an upper seat, a lower seat and a locking member;

[0023] The middle of the upper seat is hollow, forming a cavity for the lower seat to be inserted;

[0024] The upper seat and the lower seat are both provided with through grooves on their sides;

[0025] When the lower seat of one square chain block is inserted into the cavity of the upper seat of another square chain block, the grooves of the upper and lower seats overlap; adjust the insertion depth of the lower seat, and rotate the locking piece to lock the upper and lower seats to fix the distance between the upper and lower seats.

[0026] Furthermore, the connecting device is a locking clamp; the locking clamp includes a lock and a buckle seat;

[0027] Several buckle seats are arranged along the outer circumference of the base;

[0028] The locks are provided in the same number as the buckle seats and are fixed on the outer circumference of the first connecting ring;

[0029] After a plurality of locks are matched with the buckle seats and locked, the limiting device and the supporting device are combined and connected to form an assembly.

[0030] Furthermore, the locking device includes a first pressing block, a second pressing block and an annular handle;

[0031] The second pressing block is fixed at the intersection of the support beams in the middle of the second connecting ring by bolts; the annular handle passes through the second pressing block and is connected to the first pressing block;

[0032] The annular handle is threadedly connected to the second pressing block; the annular handle is rotated to drive the first pressing block to move upward or downward relative to the second pressing block; the first pressing block contacts the top of the sand core, applies pressure to the sand core, and fixes the sand core on the supporting device.

[0033] Furthermore, a baffle pointing vertically upward is provided on the side where the first pressing block contacts the second pressing block;

[0034] During the up and down movement of the first pressing block, the baffle cooperates with the second pressing block to form a blocking structure to prevent liquid paint from entering the threaded connection between the second pressing block and the annular handle.

[0035] A second aspect of the present invention provides a method for using a universal chain lifting device for sand core dipping, which is applied to the above-mentioned chain lifting device and includes the following specific steps:

[0036] S1. Place the assembled supporting device on a flat surface, and place the sand core on the base surface of the supporting device using a dedicated lifting device;

[0037] S2. Select an appropriate number of square chain blocks according to the height of the sand core and combine them into a chain group;

[0038] S3. Fit the first connecting ring with the base from top to bottom, and tighten the locking clamp after the fit is correct;

[0039] S4. Rotate the ring handle at the top to make fine adjustments and tighten.

[0040] S5. Lift the assembly by the lifting ring and place it into the coating equipment for clean coating.

[0041] Furthermore, a plurality of lifting rings are provided and fixed on the support beam of the second connecting ring; the lifting rings are distributed symmetrically with respect to the center of the second connecting ring.

[0042] Compared with the prior art, the present invention has the following beneficial technical effects:

[0043] 1. The base of the present invention adopts a cross-opening structure, which is conducive to the entry of paint and has a strengthening effect on the entire base. At the same time, several threaded holes are processed on the base, and different limit blocks can be installed by installing a base plate or according to the base of different sand cores; by installing a boss limit block that fits with the sand core base on the base plate, the front, back, left and right limits are achieved, which has universality.

[0044] 2. The base and the connecting ring are matched in a circular manner with a certain gap to ensure coaxiality; the sand core limit block is more accurate, and locking clamps are placed around it, which cooperate with the transmission threaded hole block above to realize the tightening and loosening of the sand core.

[0045] 3. The chain blocks are square with U-shaped grooves and are partially hollowed out inside, allowing the entire tooling to retract downward when not in use, reducing the size of the tooling and the floor space it occupies. Compared to traditional tools, the square shape of our chain blocks increases the limiting effect and avoids the instability of the sand cores swaying left and right during transportation.

[0046] 4. The number of square chain blocks can be adjusted according to the size of different products, increasing or decreasing the number to achieve versatility.

[0047] 5. The first pressing block and the second pressing block are matched with threads, and the addition of a stopper can block the influence of the paint on the threads, thereby preventing the threads from being stuck in the tooling.

[0048] 6. For sand cores of different heights, you can first place different numbers of square chain blocks for large-scale adjustments, and then make fine adjustments through the ring handle to keep it tight. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 Schematic diagram of the structure of the casting in an embodiment of the present invention;

[0050] Figure 2 Schematic diagram of the structure of the chain lifting device in an embodiment of the present invention;

[0051] Figure 3 is a cross-sectional view of a chain lifting device according to an embodiment of the present invention;

[0052] Figure 4 Schematic diagram of the assembly structure of the chain lifting device and the sand core in an embodiment of the present invention;

[0053] Figure 5 Schematic diagram of the structure of the sand core in an embodiment of the present invention;

[0054] Figure 6 Schematic diagram of the assembly structure of the sand core and the base in an embodiment of the present invention;

[0055] Figure 7 It is a schematic diagram of the structure of a sling in the prior art.

[0056] Figure numerals: 1. base; 2. first pressure block; 3. second pressure block; 4. ring handle; 5. lifting ring; 6. second connecting ring; 7. square chain block; 8. bottom plate; 9. first connecting ring; 10. locking clamp; 101. buckle seat; 102. lock; 11. limit block; 12. sand core; 121. upper mold; 122. lower mold; 13. casting. DETAILED DESCRIPTION

[0057] Example 1

[0058] like Figure 2 As shown, the present invention proposes a universal chain lifting device for sand core dipping, comprising:

[0059] A supporting device for supporting the sand core 12 at the bottom of the device;

[0060] The limiting device is used to cooperate with the supporting device to form a cage structure to limit and fix the sand core 12;

[0061] A connecting device, provided on the supporting device and the limiting device, for connecting the supporting device and the limiting device together;

[0062] The locking device is arranged on the top of the limiting device, and applies pressure to the sand core 12 from top to bottom to fix the sand core 12 in the cage structure formed by the supporting device and the limiting device;

[0063] The lifting assembly is arranged on the top of the limiting device; after the sand core 12 is assembled with the lifting device to form an assembly, the lifting equipment is used to connect the lifting assembly, and the assembly is lifted into the coating system for the dipping process; the separation of the sand core 12 during the dipping process is suppressed.

[0064] In this embodiment, the sand core 12 is first placed on the supporting device, and the sand core 12 is preliminarily fixed by the supporting device; then the connecting device is used to combine the limiting device and the supporting device to form a cage-type limiting structure to limit the sand core 12; at the same time, the locking device arranged on the top of the limiting device is used to apply pressure to the sand core 12 from top to bottom, and the sand core 12 is fixed in the cage-type structure formed by the supporting device and the limiting device; when coating operations are required, the entire assembly is lifted into the coating system by the lifting assembly to carry out the dipping process; the separation of the sand core 12 in the dipping process can be effectively suppressed to ensure the dipping effect.

[0065] In this embodiment, if Figure 2 As shown, the supporting device includes a base 1 and a bottom plate 8;

[0066] The base 1 is an annular support structure, the middle of which is set as a cross structure with several openings; the cross opening structure on the supporting device is used for the entry of paint to dip-coat the bottom of the sand core 12; the setting of the cross structure ensures the strength of the base 1 and leaves enough space for the dipping process. The bottom plate 8 is fixed on the base 1 and cooperates with the base 1 to expose the cross opening structure; the bottom plate 8 is fixed along the cross structure of the base 1 and extends to both sides; after installation, the bottom plate 8 is flush with the upper surface of the base 1; depending on the structure of the sand core 12, bottom plates 8 of different shapes can be set to be compatible with sand cores 12 of different shapes; in addition, several bolt fixing positions are reserved on the bottom plate 8; a number of limit blocks 11 fastened by bolts are set on the bottom plate 8; the limit blocks 11 cooperate with the bottom of the sand core 12 to form a limit structure to fix the sand core 12. The bottom plate 8 can be provided with limit blocks 11 of different sizes and quantities according to the actual shape of the sand core 12; such as Figure 2 As shown, in this embodiment, two limiting blocks 11 are combined to form a "T"-shaped structure located on the table surface of the base 1 to assist in fixing the bottom of the sand core 12.

[0067] like Figure 3As shown, the limiting device includes a second connecting ring 6, several square chain blocks 7 and a first connecting ring 9; the first connecting ring 9 and the second connecting ring 6 are both configured as annular members identical to the base 1, for matching with the base 1; the first connecting ring 9 serves as the bottom supporting structure of the limiting device and is connected to the supporting device in cooperation with the supporting device, and is locked using a connecting device; the second connecting ring 6 is arranged parallel to the top of the first connecting ring 9; several support beams are arranged in the middle of the second connecting ring 6; several support beams intersect at the center of the second connecting ring 6, and the support beams strengthen the supporting strength of the second connecting ring 6; at the same time, An installation platform is formed on the ring 6 for the installation of lifting components and locking devices; in this embodiment, multiple square chain blocks 7 are combined to form a chain group, and at least 3 groups of chain groups are provided, and preferably 4-6 groups; the number of chain groups is consistent with the number of locking clamps 10; the number of square chain blocks 7 in each group is freely selected according to the height of the sand core 12. In this embodiment, two square chain blocks 7 are selected from each chain group for combination; the multiple chain groups are distributed in a circular array between the first connecting ring 6 and the second connecting ring 9, and cooperate with the upper and lower connecting rings to form a cage-type limiting structure for limiting the sand core 12.

[0068] like Figure 3 As shown, the square chain block 7 includes an upper seat, a lower seat and a locking member; a downwardly extending support block is provided at the bottom of the first connecting ring 6, and the support block is a solid structure, which is used to increase the connection strength between the first connecting ring 6; a lower seat is provided at the bottom of the support block;

[0069] In this embodiment, the upper seat is hollow in the middle, forming a cavity for the lower seat to be inserted into. Grooves are provided on the sides of both the upper and lower seats. When the lower seat of one square chain block 7 is inserted into the cavity of the upper seat of another square chain block 7, the grooves of the upper and lower seats overlap. The insertion depth of the lower seat is adjusted, and the locking member is rotated to connect the upper and lower seats, fixing the spacing between them. When the tooling is not in use, the square chain blocks 7 can be retracted together to reduce space usage.

[0070] By adjusting the number of square chain blocks 7, the height of the limit device can be quickly adjusted to suit sand cores 12 of different heights; and then fine-tuning is performed with the locking device so that the sand core 12 placed on the base 1 can be stably clamped, avoiding instability and separation during the dipping process.

[0071] In an optional embodiment, if Figure 2 As shown, the connecting device is a locking clamp 10; the locking clamp 10 includes a lock 102 and a buckle seat 101; a plurality of buckle seats 101 are arranged along the outer periphery of the base 1; the locks 102 are arranged in the same number as the buckle seats 101, and are fixed on the outer periphery of the first connecting ring 1; after the plurality of locks 102 are matched and locked with the buckle seats 101, the limiting device and the supporting device are combined and connected to form an assembly.

[0072] The connection device is not limited to a specific model, and traditional locks, bolts and other connection methods are all acceptable; in this embodiment, the lock clamp 10 is used as a preferred case for introduction.

[0073] In this embodiment, if Figure 2 As shown, the locking device includes a first pressing block 2, a second pressing block 3 and an annular handle 4;

[0074] The second pressure block 3 is fixed at the intersection of the support beam in the middle of the second connecting ring 6 by bolts; the annular handle 4 is assembled by an annular ring and a partially threaded rod by tightening fasteners; the section of the rod body connected to the first pressure block 2 has no threads, and is connected to the second pressure block 3 by a threaded connection; the annular handle 4 passes through the second pressure block 3 and is connected to the first pressure block 2; the first pressure block 2 can also be fixed by welding, and the contact surface with the sand mold can be polished and flattened; rotating the annular handle 4 drives the first pressure block 2 to move upward or downward relative to the second pressure block 3; the first pressure block 2 contacts the top of the sand core 12, applies pressure to the sand core 12, and fixes the sand core 12 on the supporting device.

[0075] In an optional embodiment, if Figure 3 As shown, a vertically upward baffle is provided on the side where the first pressing block 2 contacts the second pressing block 3; during the up and down movement of the first pressing block 2, the baffle cooperates with the second pressing block 3 to form a blocking structure to prevent liquid paint from entering the threaded connection between the second pressing block 3 and the annular handle 4, causing the thread to become stuck.

[0076] Example 2

[0077] This embodiment provides a method for using a universal chain lifting device for sand core dipping, which is applied to the chain lifting device in Example 1 and includes the following specific steps:

[0078] S1, place the assembled supporting device on a flat surface, and place the sand core 12 on the base 1 of the supporting device through a dedicated lifting device; Figure 7 Status shown

[0079] S2. Select an appropriate number of square chain blocks 7 according to the height of the sand core 12 and combine them into a chain group;

[0080] S3, mate the first connecting ring 9 with the base 1 from top to bottom, and lock the locking fixture 10 after the mate is correct; Figure 5 Status shown;

[0081] S4. Rotate the uppermost ring handle 4 to make fine adjustments and tighten.

[0082] S5. Lift the assembly by the lifting ring and place it into the coating equipment for clean coating.

[0083] Furthermore, a plurality of lifting rings 5 are provided and fixed on the support beam of the second connecting ring 6 ; the lifting rings 5 are distributed symmetrically with respect to the center of the second connecting ring 6 .

[0084] In this embodiment, Figure 5 As shown, the sand core 12 is divided into an upper mold 121 and a lower mold 122. First, the upper mold 121 and the lower mold 122 need to be closed; then a special lifting component is used to fix it on the base 1, and the limit block 11 on the base 1 is used for auxiliary fixation; then the uppermost ring handle 4 is rotated to make fine adjustments and tighten it, and the sand core 12 is placed in the entire tooling as a whole, and then it is lifted by the lifting ring 5 and placed in the coating equipment for clean coating.

[0085] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A universal chain lifting device for sand core dipping, characterized in that: include: A supporting device, used for supporting the sand core at the bottom of the device; The limiting device is used to cooperate with the supporting device to form a cage structure to limit and fix the sand core; A connecting device, provided on the supporting device and the limiting device, for connecting the supporting device and the limiting device together; The locking device is arranged on the top of the limiting device, exerting pressure on the sand core from top to bottom, thereby fixing the sand core in the cage structure formed by the supporting device and the limiting device; The lifting assembly is arranged on the top of the limiting device; after the sand core and the lifting device are assembled to form an assembly, the lifting equipment is used to connect the lifting assembly, and the assembly is lifted into the coating system for the dipping process; the separation of the sand core during the dipping process is suppressed.

2. The universal chain lifting device for sand core dipping according to claim 1, characterized in that: The supporting device includes a base and a bottom plate; The base is a ring-shaped support structure, the center of which is a cross structure with several openings. The bottom plate is fixed on the base and cooperates with the base to expose the cross opening structure; several bolt fixing positions are reserved on the bottom plate; A plurality of limit blocks fastened by bolts are arranged on the bottom plate; the limit blocks cooperate with the bottom of the sand core to form a limit structure to fix the sand core.

3. The universal chain lifting device for sand core dipping according to claim 1, characterized in that: The cross opening structure on the supporting device is used for the entry of coating to dip-coat the bottom of the sand core.

4. The universal chain lifting device for sand core dipping according to claim 1, characterized in that: The limiting device includes a second connecting ring, a plurality of square chain blocks and a first connecting ring; The first connecting ring and the second connecting ring are both configured as annular members identical to the base; the first connecting ring serves as the bottom supporting structure of the limiting device and is connected to the supporting device in coordination, and is locked using the connecting device; The second connecting ring is arranged parallel to and above the first connecting ring; a plurality of support beams are arranged in the middle of the second connecting ring; the plurality of support beams intersect at the center of the second connecting ring; A plurality of square chain blocks are combined to form a chain group; the number of square chain blocks in each group is freely selected according to the height of the sand core; the plurality of chain groups are distributed in a circular array between the first connecting ring and the second connecting ring, and cooperate with the upper and lower connecting rings to form a cage-type limiting structure.

5. The universal chain lifting device for sand core dipping according to claim 4, characterized in that: The square chain block includes an upper seat, a lower seat and a locking piece; The middle of the upper seat is hollow, forming a cavity for the lower seat to be inserted; The upper seat and the lower seat are both provided with through grooves on their sides; When the lower seat of one square chain block is inserted into the cavity of the upper seat of another square chain block, the grooves of the upper and lower seats overlap; adjust the insertion depth of the lower seat, and rotate the locking piece to lock the upper and lower seats to fix the distance between the upper and lower seats.

6. The universal chain lifting device for sand core dipping according to claim 1, characterized in that: The connecting device is a locking clamp; the locking clamp includes a lock and a buckle seat; Several buckle seats are arranged along the outer circumference of the base; The locks are provided in the same number as the buckle seats and are fixed on the outer circumference of the first connecting ring; After a plurality of locks are matched with the buckle seats and locked, the limiting device and the supporting device are combined and connected to form an assembly.

7. The universal chain lifting device for sand core dipping according to claim 1, characterized in that: The locking device includes a first pressing block, a second pressing block and an annular handle; The second pressing block is fixed at the intersection of the support beams in the middle of the second connecting ring by bolts; the annular handle passes through the second pressing block and is connected to the first pressing block; The annular handle is threadably connected to the second pressing block; The annular handle is rotated to drive the first pressing block to move upward or downward relative to the second pressing block; the first pressing block contacts the top of the sand core, applies pressure to the sand core, and fixes the sand core on the supporting device.

8. The universal chain lifting device for sand core dipping according to claim 7, characterized in that: A baffle pointing vertically upward is provided on the side where the first pressing block contacts the second pressing block; During the up and down movement of the first pressing block, the baffle cooperates with the second pressing block to form a blocking structure to prevent liquid paint from entering the threaded connection between the second pressing block and the annular handle.

9. A method for using a universal chain lifting device for sand core dipping, applied to the chain lifting device according to any one of claims 1 to 8, characterized in that: The specific steps include: S1. Place the assembled supporting device on a flat surface, and place the sand core on the base surface of the supporting device using a dedicated lifting device; S2. Select an appropriate number of square chain blocks according to the height of the sand core and combine them into a chain group; S3. Fit the first connecting ring with the base from top to bottom, and tighten the locking clamp after the fit is correct; S4. Rotate the ring handle at the top to make fine adjustments and tighten. S5. Lift the assembly by the lifting ring and place it into the coating equipment for clean coating.

10. The method for using the universal chain lifting device for sand core dipping according to claim 9, characterized in that: A plurality of lifting rings are provided and fixed on the support beam of the second connecting ring; the lifting rings are distributed symmetrically with respect to the center of the second connecting ring.

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