Casting cylinder body coring clamp

Abstract

The utility model relates to a cast cylinder coring clamp which comprises a lifting table and a bottom frame connected with the lifting table, a fixing table is distributed below the lifting table, a limiting assembly extending into a sand core for positioning is arranged in the middle of the fixing table, and pressing assemblies for pressing and matching a plurality of groups of sand cores to prevent the sand cores from shaking during clamping are arranged on the two sides of the bottom frame in the horizontal direction. Hoisting assemblies used for hoisting the whole cast sand core are arranged on the two sides, perpendicular to the horizontal direction, of the fixing table. A traditional circular positioning groove is changed into a rectangular positioning groove, the degree of freedom in the center distance direction is released during positioning, the degree of freedom in the two directions of the main body core is solved through the first positioning pin, and the influence of large fluctuation of the center distance of two holes on positioning is solved; the problem of large positioning position fluctuation caused by large size change of the single chip core is solved through the second positioning pin, and accumulated errors are reduced by selecting the middle position of the main body core.

Description

Technical Field

[0001] This utility model relates to the field of casting core-taking fixture design, specifically a casting cylinder core-taking fixture. Background Technology

[0002] The main core extraction fixture adopts the classic "one-face two-pin method" positioning method. This positioning method has small positioning error, fewer positioning elements, and is easy to operate. It can complete the positioning of all six degrees of freedom. It is currently the most mainstream positioning method for box-type parts. Now, cylinder blocks, cylinder heads, covers on automobile engines, and various housings on automobile transmissions are all using this positioning method for precision machining positioning.

[0003] The current positioning method has problems such as large positioning size error and occasional damage to the positioning surface of the main core by the positioning device during positioning. In severe cases, the positioning device directly crushes the main core and scraps it. In order to solve the above problems, a casting cylinder core removal fixture was designed and developed. Summary of the Invention

[0004] To address the aforementioned technical problems, this utility model proposes a core-taking fixture for casting cylinder blocks. The technical solution adopted by this utility model to solve the technical problem is as follows:

[0005] A casting cylinder core-taking fixture includes a lifting platform and a base frame connected to the lifting platform. A fixed platform is distributed below the lifting platform. A limiting component that extends into the sand core for positioning is provided in the middle of the fixed platform. A clamping component that presses multiple sets of sand cores together to prevent shaking during clamping is provided on both sides of the horizontal direction of the base frame. A lifting component that lifts the cast sand core as a whole is provided on both sides of the fixed platform perpendicular to the horizontal direction.

[0006] The limiting component includes a first limiting support installed on the lifting platform. The first limiting support has two first positioning pins distributed in parallel along the horizontal direction in the middle. The first limiting support has second positioning pins on both sides perpendicular to the horizontal direction.

[0007] The beneficial effects of this utility model are:

[0008] This invention replaces the traditional circular positioning groove with a rectangular one, allowing for greater freedom of center distance during positioning. The first positioning pin addresses the two-way freedom of the main core, resolving the impact of large fluctuations in the center distance between the two holes on positioning. The second positioning pin solves the problem of large fluctuations in positioning position caused by large changes in the size of the single core, and selects the middle position of the main core to reduce cumulative errors. Attached Figure Description

[0009] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0010] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0011] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0012] Figure 3 This is a front view structural diagram of the present utility model;

[0013] Figure 4 This is a three-dimensional structural diagram of the limiting component of this utility model;

[0014] Figure 5 This is a schematic diagram of the main core structure of this utility model.

[0015] The diagram shows: 1. Lifting platform; 2. Base frame; 3. Limiting assembly; 4. Pressing assembly; 5. Lifting assembly; 6. Fixed platform; 7. Cylinder No. 2; 8. Connecting frame; 9. Guide rod; 10. Limiting pin; 11. Single core No. 1; 12. Single core No. 6; 13. Single core No. 2; 14. Single core No. 3; 15. Single core No. 4; 16. Single core No. 5; 31. Limiting support No. 1; 32. Positioning pin No. 1; 33. Positioning pin No. 2; 34. Guard plate; 41. Cylinder No. 1; 42. Buffer pad; 43. Limiting support No. 2; 51. Hook; 52. Hinge seat; 53. Connecting rod. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described more clearly and completely below with reference to the accompanying drawings in the embodiments. Of course, the described embodiments are only a part of the present utility model and not all of them. Based on this embodiment, other embodiments obtained by those skilled in the art without creative effort are all within the protection scope of this utility model.

[0017] like Figures 1 to 5 As shown, a casting cylinder core-taking fixture includes a lifting platform 1 and a base frame 2 connected to the lifting platform 1. A fixed platform 6 is distributed below the lifting platform 1. A limiting component 3 is provided in the middle of the fixed platform 6 to extend into the sand core for positioning. Both sides of the base frame 2 in the horizontal direction are provided with clamping components 4 to press multiple sets of sand cores together to prevent shaking during clamping. The fixed platform 6 is provided with lifting components 5 on both sides perpendicular to the horizontal direction to lift the cast sand core as a whole.

[0018] The limiting component 3 includes a first limiting support 31 installed on the lifting platform 1. The first limiting support 31 has two first positioning pins 32 arranged in parallel along the horizontal direction in the middle. The first limiting support 31 has second positioning pins 33 on both sides perpendicular to the horizontal direction.

[0019] The cross-sections of the first positioning pin 32 and the second positioning pin 33 are rectangular.

[0020] A protective plate 34 is provided between the first positioning pin 32 and the first limiting support 31, and a protective plate 34 is also provided between the second positioning pin 33 and the first limiting support 31.

[0021] like Figure 5 As shown, this is a schematic diagram of the main core structure. The two sides perpendicular to the horizontal direction are single core 11 and single core 6 12, and the middle part is single core 2 13, single core 3 14, single core 4 15, and single core 5 16.

[0022] The center line of the first positioning pin 32 coincides with the center line of the mating surface of the third single core 14 and the fourth single core 15. The position setting of the first positioning pin 32 solves the problem of large fluctuations in positioning position caused by large changes in the size of the single core. Selecting the middle position of the main core reduces the cumulative error.

[0023] The No. 2 positioning pin 33 cooperates with the No. 1 single core 11 and the No. 6 single core 12, and the traditional round positioning pin of the sand core is changed to a rectangle. During positioning, the freedom of the center distance direction is released. Through the two No. 2 positioning pins 33, the freedom of the two directions of the main core is solved, and the influence of the large fluctuation of the center distance between the two holes on the positioning is solved.

[0024] The second positioning pin 33 restricts the two degrees of freedom of the main core to move forward and backward and rotate vertically around the main core. The first positioning pin 32 restricts the degree of freedom of the main core to move left and right. The clamping component 4 restricts the three degrees of freedom, thus completing the positioning of the main core on the core removal fixture.

[0025] The clamping assembly 4 includes a first cylinder 41 mounted on the base frame 2 and distributed parallel to the width direction of the base frame 2. The piston rod end of the first cylinder 41 is provided with a buffer pad 42; the buffer pad 42 expands the clamping area and prevents damage to the main core.

[0026] The clamping assembly 4 also includes a second limiting support 43 mounted on the fixed platform 6 and symmetrically distributed in the horizontal direction to clamp the top of the sand core. Figure 2 As shown, there are two sets of No. 2 limiting supports 43, which are symmetrically distributed in the horizontal direction. There is a hoisting component 5 between each set of No. 2 limiting supports 43. The main core is formed by connecting and stacking No. 1 single core 11, No. 6 single core 12, No. 2 single core 13, No. 3 single core 14, No. 4 single core 15 and No. 5 single core 16. When clamping, it is necessary to cooperate with No. 1 cylinder 41 and No. 2 limiting supports 43 to prevent detachment or displacement during the clamping process.

[0027] The hoisting assembly 5 includes two sets of hooks 51 symmetrically distributed in the horizontal direction. The fixed platform 6 is provided with a hinge seat 52 that cooperates with the corresponding hook 51. A connecting rod 53 is hinged to one end of the hook 51 near the hinge seat 52. The end of the connecting rod 53 away from the hook 51 is hinged and installed on the lifting platform 1. The hook 51 has an L-shaped cross section. The hinge seat 52 is hinged to the corner of the hook 51. A wear-resistant pad is provided at the contact point between the hook 51 and the core.

[0028] The lifting platform 1 is connected to a second cylinder 7, which is equipped with a connecting frame 8. The fixed platform 6 is provided with a guide rod 9 that cooperates with the lifting platform 1. The fixed platform 6 is fixedly connected to the connecting frame 8. The second cylinder 7 drives the lifting platform 1 to descend, so that the connecting rod 53 drives the hook 51 to swing, which cooperates with the core to lift the core.

[0029] The bottom frame 2 is provided with limiting pins 10 on both sides along the horizontal direction to cooperate with the casting equipment.

[0030] In this utility model, when the sand core needs to be lifted, the equipment drives the connecting frame 8 to descend, and the limiting pin 10 is initially positioned with the casting equipment. Then, the first positioning pin 32 and the second positioning pin 33 cooperate with the main core, and at the same time, the second limiting support 43 cooperates with the main core. Then, the first cylinder 41 drives the buffer pad 42 to cooperate with the main core to press the main core tightly. Finally, the second cylinder 7 drives the lifting platform 1 to descend, so that the connecting rod 53 drives the hook 51 to swing, cooperate with the core body, and lift the core body through the hook 51.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A core-removal fixture for a casting cylinder, characterized by: The application relates to a sand core lifting device, which comprises a lifting platform (1), a bottom frame (2) connected with the lifting platform (1), a fixing platform (6) arranged below the lifting platform (1), a limiting assembly (3) arranged in the middle of the fixing platform (6) and extending into a sand core to position the sand core, a pressing assembly (4) arranged on both sides of the bottom frame (2) in the horizontal direction and used for pressing multiple groups of sand cores to prevent shaking during clamping, a hoisting assembly (5) arranged on both sides of the fixing platform (6) in the vertical direction and used for hoisting the whole sand core after casting, and the like. The limiting assembly (3) comprises a first limiting support (31) arranged on the lifting platform (1), two first positioning pins (32) arranged in the middle of the first limiting support (31) and parallelly distributed in the horizontal direction, and second positioning pins (33) arranged on both sides of the first limiting support (31) in the vertical direction.

2. A core print clamp for a casting cylinder as defined in claim 1, characterized in that: The first positioning pins (32) and the second positioning pins (33) are rectangular in section.

3. A core print clamp for a casting cylinder as defined in claim 1, wherein: A guard plate (34) is arranged between the first positioning pins (32) and the first limiting support (31), and a guard plate (34) is also arranged between the second positioning pins (33) and the first limiting support (31).

4. A core print clamp for a casting cylinder as defined in claim 1, wherein: The pressing assembly (4) comprises a first air cylinder (41) arranged on the bottom frame (2) and parallelly distributed along the width direction of the bottom frame (2), and a buffer pad (42) arranged at the end of the piston rod of the first air cylinder (41).

5. A core print clamp for a casting cylinder as defined in claim 4, wherein: The pressing assembly (4) further comprises a second limiting support (43) arranged on the fixing platform (6) and symmetrically distributed along the horizontal direction to press the top of the sand core.

6. A core print clamp for a casting cylinder as defined in claim 1, wherein: The hoisting assembly (5) comprises two groups of lifting hooks (51) symmetrically distributed in the horizontal direction, a hinge seat (52) arranged on the fixing platform (6) and matched with the corresponding lifting hook (51), a connecting rod (53) hingedly connected to one end side of the lifting hook (51) close to the hinge seat (52), and the connecting rod (53) being hingedly arranged on the lifting platform (1) away from the lifting hook (51).

7. A core print clamp for a casting cylinder as defined in claim 6, wherein: The lifting platform (1) is connected with a second air cylinder (7), the second air cylinder (7) is provided with a connecting frame (8), a guide rod (9) matched with the lifting platform (1) is arranged on the fixing platform (6), and the fixing platform (6) is fixedly connected with the connecting frame (8).

8. A core print clamp for a casting cylinder as defined in claim 7, characterized in that: Limiting pins (10) matched with the casting equipment are arranged on both sides of the bottom frame (2) in the horizontal direction.

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