Hydraulic rear cover sand core assembly jig

Abstract

The utility model relates to a kind of hydraulic rear cover sand core assembly jig, including bottom plate, four height limiting columns and sand core limiting module.The four height limiting columns are threadedly connected in bottom plate four corners, wherein three height limiting columns are same in height, and another height limiting column is different in height.The sand core limiting module is threadedly connected in the top of height-limiting column of different height, including sand core limiting bottom plate and two sand core limiting columns.The height limiting column and sand core limiting column are all replaceable structure.The jig is designed by differentiating height limiting column and modular limiting structure, realizes the accurate overhead positioning of sand core, single person can complete assembly operation, reduces labor cost, improves production efficiency and dimensional stability, and replaceable column structure enhances universality and flexibility, suitable for the sand core assembly needs of various complex castings.

Description

Technical Field

[0001] This utility model relates to the field of casting technology, and in particular to a hydraulic rear cover sand core assembly fixture for casting hydraulic systems. Background Technology

[0002] In traditional casting processes, the assembly of sand cores for hydraulic back cover castings primarily relies on manual operation. Due to the complex internal structure of the castings, sand core assembly is inefficient, typically requiring two or more people to complete. Traditional processes rely mainly on adhesives to fix the sand cores; however, when dealing with complex castings, adhesives alone are insufficient to meet the strength requirements for fixation. This can lead to problems such as sand core displacement and deformation during pouring, thus affecting the quality and performance of the casting. For example, sand core displacement can cause blockage or deformation of internal oil passages in hydraulic back cover castings, affecting the normal operation of the hydraulic system. Furthermore, small cores are often required to be assembled at the bottom of the sand core for hydraulic back cover castings to form internal detailed structures, but traditional assembly methods are insufficient in terms of operating space and positioning accuracy. Therefore, there is an urgent need for a specialized fixture that can conveniently use screws to fix the sand core and the small cores required for assembly at the bottom of the hydraulic back cover sand core. Utility Model Content

[0003] To solve the above problems, the present invention adopts the following technical solution:

[0004] A hydraulic rear cover sand core assembly fixture includes a base plate, four height-limiting posts, and a sand core limiting module. The four height-limiting posts are threaded to the four corners of the base plate. The threaded connection allows for selection of different height-limiting posts based on different sand core specifications. Three of the height-limiting posts are the same height, while the third post has a different height. The sand core limiting module is threaded to the top of the different-height-limiting posts and includes a sand core limiting base plate and two sand core limiting posts. The two sand core limiting posts are threaded to the outer ends of the sand core limiting base plate. The threaded connection allows for selection of different height-limiting posts based on different sand core specifications. The height of the different-height-limiting posts plus the thickness of the sand core limiting base plate equals the height of the other height-limiting posts, allowing the casting to be placed stably on the upper part of the fixture.

[0005] Furthermore, a rectangular hollow area is provided at the center of the base plate, which can reduce the weight of the fixture.

[0006] Furthermore, the tops of the three height-limiting columns of the same height are all equipped with anti-slip rubber pads to prevent the sand core from shifting during assembly.

[0007] Furthermore, the upper surface of the sand core limiting base plate is provided with anti-slip texture to prevent the sand core from sliding. In addition, anti-slip texture is also provided on the lower surface of the base plate to prevent the sand core from shifting during assembly.

[0008] Furthermore, the sand core limiting base plate has a triangular structure, which makes it less likely for the sand core to shake during assembly. All three corners are provided with arc-shaped transition surfaces to prevent sharp parts from scratching the sand core.

[0009] Furthermore, the four height-limiting columns and two sand core limiting columns are all replaceable structures, and different heights of height-limiting columns and sand core limiting columns can be selected according to different specifications of sand cores to facilitate the assembly and fixing of sand cores and small cores.

[0010] This utility model has the following beneficial effects:

[0011] This utility model relates to a hydraulic back cover sand core assembly fixture. Through an innovative overhead positioning design, a single person can complete the assembly of the bottom locking screw and small core of the sand core, reducing labor costs and improving production efficiency. The fixture employs a differentiated height-limiting column and modular limiting structure design, which not only improves the accuracy and efficiency of sand core assembly, but its replaceable structure also allows compatibility with various complex castings, greatly expanding its applicability. This design effectively solves the problems of inconvenient operation and low efficiency in traditional sand core assembly processes. Attached Figure Description

[0012] Figure 1 This is a three-dimensional view of the fixture of this utility model;

[0013] Figure 2 This is a schematic diagram of the assembly of the fixture of this utility model;

[0014] Figure 3 This is a cross-sectional view of the assembly part of the fixture of this utility model.

[0015] In the diagram: 1. Base plate; 11. Hollowed-out area; 2. Height limit column; 3. Sand core limiting module; 31. Sand core limiting base plate; 32. Sand core limiting column; 4. Anti-slip rubber pad; 5. Anti-slip texture. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] like Figure 1 and Figure 2As shown, this utility model provides a hydraulic rear cover sand core assembly fixture, including a base plate (1), four height limiting posts (2), and a sand core limiting module (3). The four height limiting posts (2) are threaded to the four corners of the base plate (1), three of which are the same height and the other is different. The sand core limiting module (3) is threaded to the top of the height limiting posts (2) of different heights. The sand core limiting module (3) includes a sand core limiting base plate (31) and two sand core limiting posts (32). The two sand core limiting posts (32) are threaded to the outer ends of the sand core limiting base plate (31) to constrain one corner of the sand core and prevent the front of the sand core from moving left or right. The height of the height limiting posts (2) of different heights plus the thickness of the sand core limiting base plate (31) equals the height of the other height limiting posts (2), ensuring that the sand core can be placed stably on the fixture. The base plate (1) has a rectangular hollow area (11) at its center, which can reduce the weight of the fixture.

[0018] like Figure 3 As shown, the bottom surface of the base plate (1) is provided with anti-slip texture (5) to prevent the sand core from shifting during assembly.

[0019] When using this utility model, first place the base plate (1) on the workbench, ensuring that the anti-slip texture (5) on the lower surface of the base plate (1) is tightly fitted to the workbench to prevent the fixture from sliding. Then, thread the four height-limiting posts (2) to the four corners of the base plate (1), with three height-limiting posts (2) of the same height and the other height-limiting post (2) of different heights. When installing the height-limiting posts (2), ensure that the threaded connections are tight to guarantee the stability of the height-limiting posts (2). The tops of the three height-limiting posts (2) of the same height are all equipped with anti-slip rubber pads (4). These anti-slip rubber pads (4) can increase the friction between the height-limiting posts (2) and the sand core, preventing the sand core from shifting during assembly.

[0020] Next, the sand core limiting module (3) is threaded to the top of the height limiting columns (2) of different heights. The sand core limiting module (3) includes a sand core limiting base plate (31) and two sand core limiting columns (32), which are threaded to the outer ends of the sand core limiting base plate (31). When installing the sand core limiting module (3), ensure that the threaded connection is tight. The upper surface of the sand core limiting base plate (31) and the lower surface of the base plate (1) are provided with anti-slip textures (5), which can further increase the friction and prevent the sand core from sliding. In addition, the sand core limiting base plate (31) has a triangular structure, and arc-shaped transition surfaces are provided at its three corners.

[0021] When assembling the sand core, place it stably on the fixture, ensuring that the bottom of the sand core is in close contact with the anti-slip rubber pads (4) at the top of the three height-limiting posts (2) of the same height, while one bottom corner of the sand core is limited and fixed by the sand core limiting post (32) of the sand core limiting module (3). By adjusting the position of the sand core, keep it stable on the fixture to prevent it from shaking or shifting in subsequent operations. Then, insert the screw through the gap between the base plate (1) and the sand core and tighten it with a wrench to ensure that the sand core is firmly fixed. Finally, assemble the small core under the sand core base plate to complete the entire assembly process.

[0022] In practical applications, this utility model can replace the height limiting post (2) and the sand core limiting post (32) of the corresponding height according to different specifications of hydraulic back cover sand cores to meet diverse production needs.

[0023] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A hydraulic rear cover sand core assembly fixture, comprising a base plate (1), characterized in that: It also includes four height-limiting columns (2) and a sand core limiting module (3). The four height-limiting columns (2) are threaded to the four corners of the base plate (1). Three of the height-limiting columns (2) are the same height, and the other height-limiting column (2) is different in height. The sand core limiting module (3) is threaded to the top of the height-limiting columns (2) with different heights. The sand core limiting module (3) includes a sand core limiting base plate (31) and two sand core limiting columns (32). The two sand core limiting columns (32) are threaded to the outer ends of the sand core limiting base plate (31). The height of the height-limiting columns (2) with different heights plus the thickness of the sand core limiting base plate (31) is equal to the height of the other three height-limiting columns (2).

2. The hydraulic rear cover sand core assembly fixture according to claim 1, characterized in that, The base plate (1) has a rectangular hollow area (11) at its center.

3. The hydraulic rear cover sand core assembly fixture according to claim 1, characterized in that, The top of each of the three height-limiting columns (2) of the same height is provided with an anti-slip rubber pad (4).

4. The hydraulic rear cover sand core assembly fixture according to claim 1, characterized in that, The upper surface of the sand core limiting base plate (31) and the lower surface of the base plate (1) are provided with anti-slip texture (5).

5. A hydraulic rear cover sand core assembly fixture according to claim 1, characterized in that, The sand core limiting base plate (31) has a triangular structure, and arc-shaped transition surfaces are provided at its three corners.

6. A hydraulic rear cover sand core assembly fixture according to claim 1, characterized in that, The four height-limiting columns (2) and the two sand core limiting columns (32) are all replaceable structures.

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