Core setting jig device of sand core

Abstract

The utility model discloses a core setting jig device of a sand core, which comprises an upper jig assembly used for grabbing the sand core and a lower jig assembly used for positioning the sand core, the upper jig assembly ascends and descends relative to the lower jig assembly to clamp or place the sand core, and the lower jig assembly comprises a lower jig fixing plate. The lower jig assembly comprises a fixing frame, the lower end of the fixing frame is movably connected with a guiding frame, the guiding frame is provided with a guiding column matched with the guiding seat, and the limiting column makes contact with the guiding frame to limit descending of the guiding frame. The fixing frame is provided with a sand core clamping jaw and a sand core positioning unit, and the fixing frame moves downwards to enable the sand core positioning unit to fix a sand core and clamp the sand core through the clamping jaw. According to the core setting jig device for the sand core, the sand core is positioned through the upper jig assembly and the lower jig assembly, so that the sand core is convenient to grab, the labor intensity is reduced, and the sand core is prevented from being damaged during core setting.

Description

Technical Field

[0001] The utility model relates to the field of sand core jigs, in particular to a sand core lowering jig device. Background Art

[0002] Sand cores are mainly used to form inner holes and cavities of castings. During the casting process, sand cores need to be made first and then placed in the lower mold of the casting mold (this process is referred to as core lowering).

[0003] At present, sand core setting is carried out on-site manually and with auxiliary tools, which requires the coordinated operation of three people. The labor cost is high, and the manual core setting has low precision. The sand mold is easily rubbed during core setting, resulting in defective products.

[0004] The weight of a single sand core is heavy, about 35KG, and it is large in size, with a diameter of about 700mm. When manually placing the core, the worker needs to climb onto the sand box, which is laborious and labor-intensive. Utility Model Content

[0005] The main technical problem solved by the utility model is to provide a core lowering fixture device for sand cores, which positions the sand cores through an upper fixture component and a lower fixture component, facilitates the grabbing of the sand cores, reduces manual labor, and avoids damage to the sand cores when lowering the cores.

[0006] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a lower core fixture device for a sand core, comprising an upper fixture assembly for grabbing the sand core and a lower fixture assembly for positioning the sand core, the upper fixture assembly is lifted and lowered relative to the lower fixture assembly to clamp or place the sand core, the lower fixture assembly comprises a lower fixture fixing plate, the lower fixture fixing plate is provided with a lower positioning block that cooperates with the bottom of the sand core, the lower fixture fixing plate is also provided with a guide seat and a limit column, the upper fixture assembly comprises a fixed frame, the lower end of the fixed frame is movably connected with a guide frame, the guide frame is provided with a guide column that cooperates with the guide seat, the limit column contacts the guide frame to limit the downward movement of the guide frame, the fixed frame is provided with a sand core clamp and a sand core positioning unit, the sand core positioning unit fixes the sand core when the fixed frame moves downward and clamps the sand core through the clamp.

[0007] In a preferred embodiment of the present invention, the lower positioning blocks are arranged at intervals along the circumference of the bottom of the sand core.

[0008] In a preferred embodiment of the present invention, the guide seat has a guide hole, and the guide post is inserted into the guide hole to position the guide frame.

[0009] In a preferred embodiment of the present invention, the limiting column contacts the bottom surface of the guide frame to limit the downward movement of the guide frame.

[0010] In a preferred embodiment of the present invention, the sand core positioning unit includes a positioning column matched with a positioning hole of the sand core, and the positioning column is engaged with the positioning hole to position the sand core.

[0011] In a preferred embodiment of the present utility model, the front end of the positioning column is a wedge-shaped head, and the wedge-shaped head is engaged with the positioning hole.

[0012] In a preferred embodiment of the present invention, the sand core positioning unit further includes an upper positioning block, and the upper positioning block cooperates with the upper part of the sand core.

[0013] In a preferred embodiment of the present invention, the upper positioning block is movably connected to a support of the fixed frame.

[0014] In a preferred embodiment of the present invention, the upper positioning block, the lower positioning block and the positioning column are staggered in the vertical direction.

[0015] In a preferred embodiment of the present invention, the fixed frame and the guide frame are movably connected via connecting columns.

[0016] The beneficial effects of the utility model are as follows: the core lowering fixture device of the sand core of the utility model positions the bottom of the sand core by the lower positioning block, and the positioning structure is simple and the positioning is accurate.

[0017] The utility model discloses a lower core fixture device for a sand core, wherein a guide seat and a limit column are used to limit and guide a guide frame, thereby ensuring the downward stroke of an upper fixture component and ensuring the accurate position of the lower core of the sand core.

[0018] The core lowering fixture device of the utility model clamps and lowers the sand core by means of the sand core clamping claws, has a high degree of automation, avoids the sand core from being damaged, and simultaneously adopts the sand core positioning unit to position the sand core, thereby ensuring that the sand core is accurately positioned when coring. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the core lowering fixture device of the sand core of the utility model;

[0021] Figure 2 yes Figure 1 A cross-sectional view of

[0022] Figure 3 It is a structural schematic diagram of the lower fixture assembly positioning the sand core;

[0023] Figure 4 It is a schematic diagram of the structure of the fixed frame grabbing the sand core;

[0024] Figure 5 yes Figure 4 A cross-sectional view of

[0025] The components in the accompanying drawings are marked as follows: 1. Upper fixture assembly, 11. Fixed frame, 12. Guide frame, 13. Guide column, 14. Sand core clamp, 15. Positioning column, 16. Upper positioning block, 17. Connecting column, 2. Lower fixture assembly, 21. Lower fixture fixing plate, 22. Lower positioning block, 23. Guide seat, 24. Limiting column, 3. Sand core. DETAILED DESCRIPTION

[0026] The technical scheme in the embodiment of the utility model will be described clearly and completely below. The structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification, so that people familiar with this technology can understand and read, and are not used to limit the limiting conditions that can be implemented in the utility model, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that can be produced by the utility model and the purpose that can be achieved, should still fall within the scope of the technical content disclosed in the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of narration, and are not used to limit the scope that can be implemented. The change or adjustment of its relative relationship should also be regarded as the scope that can be implemented in the utility model without substantially changing the technical content.

[0027] See also Figures 1 to 5 A lower core jig device for a sand core includes an upper jig assembly 1 for grabbing a sand core 3 and a lower jig assembly 2 for positioning the sand core 3. The upper jig assembly 1 is lifted relative to the lower jig assembly 2 to clamp or place the sand core 3. The upper jig assembly 1 is driven by a hydraulic lifting mechanism or other conventional lifting mechanisms to achieve lifting, and the lower jig assembly 2 is movably arranged on a slide rail and driven to move forward and backward by a conventional driving component. The specific structure of the lifting mechanism and the driving component is prior art and will not be described in detail here.

[0028] The lower fixture assembly 2 includes a lower fixture fixing plate 21, on which a lower positioning block 22 is provided to cooperate with the bottom of the sand core 3, and the lower positioning blocks 22 are arranged at intervals along the bottom circumference of the sand core 3. As shown in the figure, there are two lower positioning blocks 22, which are respectively located on both sides of the sand core. The bottom of the sand core 3 is limited by the lower positioning blocks 22 to ensure the accurate position of the sand core 3. A guide seat 23 and a limiting column 24 are also provided on the lower fixture fixing plate 21. The guide seat 23 has a guide hole, and the guide seat 23 is located on the left and right sides of the lower fixture fixing plate 21, and is symmetrically arranged. The number of limiting columns 24 is 4. The guide seat 23 and the limiting column 24 provide limiting and guiding for the upper fixture assembly 1, and the specific principle is described in detail below.

[0029] The upper fixture assembly 1 comprises a fixed frame 11, and a guide frame 12 is movably connected to the lower end of the fixed frame 11. The fixed frame 11 and the guide frame 12 are movably connected via a connecting column 17.

[0030] The guide frame 12 is provided with a guide column 13 that cooperates with the guide seat 23, and the limit column 24 contacts the guide frame 12 to limit the downward movement of the guide frame 12. The lifting mechanism drives the fixed frame 11 and the guide frame 12 to move upward and downward synchronously. When the guide frame 12 moves downward for a certain distance, the guide column 13 is inserted into the guide hole to ensure that the fixed frame 11 and the lower fixture fixing plate 21 are aligned. At this time, the guide frame 12 continues to move downward, and the limit column 24 contacts the bottom surface of the guide frame 12 to limit the downward movement of the guide frame 12. At this time, the guide frame 12 no longer moves downward, and the driving mechanism still drives the fixed frame 11 downward until the fixed frame 11 contacts the sand core 3.

[0031] The fixed frame 11 is provided with a sand core clamp 14 and a sand core positioning unit. When the fixed frame 11 moves downward, the sand core positioning unit fixes the sand core and clamps the sand core 3 through the clamp. The sand core clamp 14 is driven by a cylinder and is a conventional structure, which will not be described in detail here.

[0032] The sand core positioning unit includes a positioning column 15 and an upper positioning block 16 that cooperate with the positioning hole of the sand core 3. The positioning column 15 is clamped with the positioning hole to position the sand core 3. The front end of the positioning column 15 is a wedge-shaped head, which is clamped with the positioning hole. According to different sand core structures, the number of positioning columns 15 can be set as needed. As shown in the figure, there are two positioning columns 15, and they are located on the left and right sides of the sand core 3. The wedge-shaped head and the positioning hole limit the distance between the fixed frame 11 and the sand core 3 to ensure that the sand core clamp 14 can just clamp the sand core 3.

[0033] The upper positioning block 16 cooperates with the upper part of the sand core 3. The upper positioning block 16 is movably connected to the support of the fixed frame 11. The number of the upper positioning blocks 16 is also 2, and the upper positioning blocks 16, the lower positioning blocks 22 and the positioning posts 15 are staggered in the vertical direction, so that interference between the upper positioning blocks 16, the lower positioning blocks 22 and the positioning posts 15 can be avoided after the fixed frame 11 moves downward.

[0034] When the fixed frame 11 moves downward, the front end of the positioning column 15 is a wedge-shaped head that will be stuck in the positioning hole of the sand core 3, and the upper positioning block 16 will be in circumferential contact with the upper part of the sand core 3, completing the positioning of the sand core 3 by the fixed frame 11. At this time, the sand core clamp 14 clamps the sand core 3 to complete the capture of the sand core 3. Then, after the fixed frame 11 is lifted a certain distance, the guide frame 12 is lifted synchronously to complete the coring. To put the sand core 3 into the next process, you only need to move the upper fixture assembly 1 and then repeat the lowering process of the upper fixture assembly 1.

[0035] Different from the prior art, the core lowering jig device of the sand core of the utility model positions the sand core through the upper jig assembly and the lower jig assembly, which facilitates the grabbing of the sand core, reduces the manual labor, and avoids damage to the sand core when lowering the core.

[0036] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A core lowering fixture device for a sand core, comprising an upper fixture assembly (1) for grabbing a sand core (3) and a lower fixture assembly (2) for positioning the sand core (3), wherein the upper fixture assembly (1) is raised and lowered relative to the lower fixture assembly (2) to clamp or place the sand core (3), characterized in that: The lower jig assembly (2) comprises a lower jig fixing plate (21), on which a lower positioning block cooperating with the bottom of the sand core (3) is provided, and on which a guide seat (23) and a limiting column (24) are also provided. The upper jig assembly (1) comprises a fixing frame (11), the lower end of which is movably connected to a guide frame (12), the guide frame (12) being provided with a guide column (13) cooperating with the guide seat (23), the limiting column (24) contacting the guide frame (12) to limit the downward movement of the guide frame (12), the fixing frame (11) being provided with a sand core clamping jaw (14) and a sand core positioning unit, and when the fixing frame (11) moves downward, the sand core positioning unit fixes the sand core (3) and clamps the sand core (3) through the clamping jaw.

2. The core setting fixture device for the sand core according to claim 1, characterized in that: The lower positioning blocks (22) are arranged at intervals along the circumferential direction of the bottom of the sand core (3).

3. The core setting fixture device for the sand core according to claim 1, characterized in that: The guide seat (23) has a guide hole, and the guide column (13) is inserted into the guide hole to position the guide frame (12).

4. The core setting fixture device for sand cores according to claim 1, characterized in that: The limiting column (24) contacts the bottom surface of the guide frame (12) to limit the downward movement of the guide frame (12).

5. The core setting fixture device for sand cores according to claim 1, characterized in that: The sand core positioning unit comprises a positioning column (15) matched with a positioning hole of the sand core (3); the positioning column (15) is engaged with the positioning hole to position the sand core (3).

6. The core setting fixture device for sand cores according to claim 5, characterized in that: The front end of the positioning column (15) is a wedge-shaped head, and the wedge-shaped head is engaged with the positioning hole.

7. The core setting fixture device for the sand core according to claim 5, characterized in that: The sand core positioning unit also includes an upper positioning block (16), and the upper positioning block (16) cooperates with the upper part of the sand core (3).

8. The core setting fixture device for sand cores according to claim 7, characterized in that: The upper positioning block (16) is movably connected to a support of the fixed frame (11).

9. The core setting fixture device for sand cores according to claim 7, characterized in that: The upper positioning block (16), the lower positioning block (22) and the positioning column (15) are staggered in the vertical direction.

10. The core setting fixture device for sand cores according to any one of claims 1 to 9, characterized in that: The fixed frame (11) and the guide frame (12) are movably connected via a connecting column (17).

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