Core assembling and repairing sample plate structure for piston skirt
By employing precise assembly and grinding techniques based on piston skirt core repair templates, the concentricity and dimensional issues of piston skirt cores have been resolved, thereby improving core utilization efficiency and product quality.
Patent Information
- Application Number
- CN202423028054.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-12-09
AI Technical Summary
Existing technology cannot ensure the independent dimensions and concentricity of the piston skirt core, resulting in low core utilization efficiency.
A piston skirt core repair template structure is adopted, including a working turntable, multiple sand cores and templates. Through precise assembly and grinding technology, the concentricity and dimensional accuracy of the sand cores are ensured.
This achieves gapless, wobble-free, concentric, and aligned assembly of the piston skirt core, improving the core's efficiency and product quality.
Smart Images
Figure CN223518601U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to piston skirt group core technology field especially relates to a piston skirt group core core repairing sample board structure. BACKGROUND
[0002] In gasoline engine and diesel engine, the piston skirt group core plays a key role, it ensures that the piston can accurately do reciprocating linear motion in the cylinder, the shape of the piston skirt group core matches the inner contour of the piston skirt, generally is oval and approximate oval, to adapt to the shape change of the piston due to thermal expansion and stress deformation when working, its dimensional accuracy requirement is very high, in millimeter even smaller order of magnitude, to ensure that the gap between the piston skirt and the cylinder wall is uniform, guarantee the normal operation of the engine, cooperate to treat its surface.
[0003] In the automobile engine piston production workshop, the piston skirt group core passes through casting, forging or mechanical processing initial manufacturing procedure, its size and shape accuracy can not reach the final requirement, at this moment need to use the core repairing sample board to check whether the basic shape of the piston skirt group core meets the design expectation, the piston skirt group core core repairing sample board is a kind of tool specially used for detecting and correcting the piston skirt group core, is made of high-strength alloy steel, has good wear resistance and dimensional stability, the shape of sample board matches the inner contour of the piston skirt, includes the geometric characteristics of the piston skirt under different visual angles, such as oval main body contour, the shape of the existing internal reinforcing rib and weight-reducing groove, the dimensional accuracy of sample board is extremely high, error is controlled in micron level, to ensure accurate detection and correction to the piston skirt group core.
[0004] The piston is the core component of engine, bears the explosion pressure and high temperature environment in cylinder, so the inner cavity design form is complex, is composed of five sand cores, and the structure causes great stress when molten iron solidifies and shrinks, produces deformation and dimensional fluctuation, promotes the positioning accuracy required by group core and core repairing, the traditional group core method cannot ensure the independent size of sand core, leads to the fact that the concentricity size 23 wall thickness difference cannot be ensured, therefore the use efficiency of group core is reduced. UTILITY MODEL CONTENTS
[0005] In order to make up for the above shortcomings, the utility model provides a kind of piston skirt group core core repairing sample board structure, to improve the problem of the independent size of sand core in prior art cannot be ensured, leading to the fact that the concentricity size 23 wall thickness difference cannot be ensured, therefore the use efficiency of group core is reduced.
[0006] In order to achieve the above object, the utility model discloses the following technical scheme: a piston skirt group core repairs core sample board structure, including work turntable, the top surface middle part of work turntable is equally connected with first sand core with fixed connection, the left side of first sand core is fixedly connected with fourth sand core, the right side of first sand core is fixedly connected with fifth sand core, the top of left fourth sand core is fixedly connected with second sand core, the top of fifth sand core is fixedly connected with third sand core, the top of third sand core is fixedly connected with sample board no.
[0007] As the further description of the above technical scheme:
[0008] The right side of third sand core is fixedly connected with limiting plate.
[0009] As the further description of the above technical scheme:
[0010] The inward side of two third sand cores is fixedly connected with box sealing paste.
[0011] As the further description of the above technical scheme:
[0012] The top of box sealing paste is fixedly connected with sample board no.
[0013] As the further description of the above technical scheme:
[0014] The left and right sides of the inner wall of sample board no.
[0015] As the further description of the above technical scheme:
[0016] The left and right ends of the inner side of circular frame are fixedly connected with concave-convex block.
[0017] As the further description of the above technical scheme:
[0018] The inward side of concave-convex block is fixedly connected with C-shaped block.
[0019] As the further description of the above technical scheme:
[0020] Two C-shaped blocks adopt arc design.
[0021] The utility model has the advantages of:
[0022] 1. In the utility model, through the first sand core on the rotary table, the core assembling template one is slid along the top of the first sand core, and the interference part is ground and polished, the template one and the first sand core are assembled, the four templates and the sand core surface are checked visually, and the template one and the first sand core are concentric and stable, because the template is accurate, under normal circumstances, the sand core is tightly attached to the four templates, and the sand core does not need to be ground and polished, so that no gap, no shaking, concentricity and normality are realized.
[0023] 2. In the utility model, the fourth sand core is installed in the first sand core according to the positioning pin and the hole, the arc surfaces at E and F are checked, and the interference part is ground and polished, so that the sand core arc surface and the template are matched, the shape is followed, and there is no gap, the size 23 correct combination lower end matching surface is realized by two sand core surface attachment and flatness, and the upper end is the arc surface matched with the template, the first sand core, the fourth sand core and the fifth sand core are concentric and the size 23 is completely the same, because the sand core is slightly deformed or the coating layer is uneven, the arc surface is not matched, and here several operations are needed to the research to completely match the joint surface, so that one template is combined after the divided sand core is combined, concentric and completely symmetrical. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1 It is a second sand core sectional view of the piston skirt core assembling and core repairing template structure provided by the utility model;
[0025] Figure 2 It is a concave-convex block structure diagram of the piston skirt core assembling and core repairing template structure provided by the utility model;
[0026] Figure 3 It is a box sealing paste sectional view of the piston skirt core assembling and core repairing template structure provided by the utility model;
[0027] Figure 4 It is a template two sectional display diagram of the piston skirt core assembling and core repairing template structure provided by the utility model.
[0028] LEGEND:
[0029] 1, first sand core; 2, second sand core; 3, third sand core; 4, fourth sand core; 5, fifth sand core; 6, circular frame; 7, concave-convex block; 8, limiting plate; 9, box sealing paste; 10, template one; 11, work rotary table; 12, height adjustment; 13, C-shaped block; 14, template two; 15, template three. DETAILED DESCRIPTION
[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.
[0031] Please refer to the accompanying drawings Figure 1 - the accompanying drawings Figure 3 An embodiment provided by the utility model: a piston skirt group core repairing core sample plate structure, the top surface middle part of the working turntable 11 is fixedly connected with the first sand core 1, the left side of the first sand core 1 is fixedly connected with the fourth sand core 4, and the fourth sand core 4 is closely connected with the first sand core 1, and the first sand core 1 and the fourth sand core 4 jointly constitute part of a casting model, the right side of the first sand core 1 is fixedly connected with the fifth sand core 5, the top of the fourth sand core 4 on the left side is fixedly connected with the second sand core 2, the top of the fifth sand core 5 is fixedly connected with the third sand core 3, and the fifth sand core 5 is also fixedly connected with the third sand core 3, and the two work cooperatively, thereby ensuring the accuracy and stability of the casting process, meanwhile, the top of the fifth sand core 5 is fixedly connected with the third sand core 3, the top of the third sand core 3 is fixedly connected with the sample plate one 10, the top of the second sand core 2 is fixedly connected with the height adjusting part 12, and the rear side of the second sand core 2 is provided with the sample plate three 15, so as to further improve the details of the casting model and ensure the quality of the final product, finally, the rear side of the second sand core 2 is provided with the sample plate three 15, the existence of the sample plate further strengthens the quality monitoring in the casting process, and ensures that the size and shape of the casting part reach the expected standard, and the inward side of the two third sand cores 3 is fixedly connected with the sealing paste 9.
[0032] Please refer to the accompanying drawings Figure 2 - the accompanying drawings Figure 4 The right side of the third sand core 3 is fixedly connected with the limiting plate 8, the top of the sealing paste 9 is fixedly connected with the sample plate two 14, the inner wall of the sample plate two 14 is fixedly connected with the circular frame 6 on the left and right sides, the inward side of the concave-convex block 7 is stably fixedly connected with the C-shaped block 13, the inner wall of the sample plate two 14 is fixedly connected with the circular frame 6 on the left and right sides, and the inward side of the concave-convex block 7 is fixedly connected with the C-shaped block 13, the structure improves the functionality of the product and enhances the durability, the left and right ends of the inner side of the circular frame 6 are fixedly connected with the concave-convex block 7, the left and right ends of the inner side of the circular frame 6 are fixedly connected with the concave-convex block 7, and the two C-shaped blocks 13 are designed in an arc shape.
[0033] Working principle: through the first sand core 1 on the turntable, the core assembly template one 10 slides along the top of the first sand core 1, and the interference part is ground and polished, the assembly of the core assembly template one 10 and the first sand core 1 is completed, visual inspection is carried out on the four core assembly templates and the sand core surface, and the core assembly template one 10 and the first sand core 1 are concentric and stable. Because the template is accurately made, under normal circumstances, the four core assembly templates are tightly attached to the sand core by cooperating with the core assembly template one 10, and the sand core does not need to be ground and polished, so that no gap, no shaking, concentricity and normality can be achieved.
[0034] The fourth sand core 4 is assembled into the first sand core 1 through the positioning pin and the hole, the circular arc surfaces at positions E and F are checked, and the interference parts are ground and polished, so that the sand core circular arc surfaces are matched with the template, follow the shape, have no gap, and the size 23 is correctly combined. The fifth sand core 5 is assembled by the same method. In this step, the upper end circular arc surface and the lower end matching surface are visually inspected to achieve no gap, follow the shape and smoothness at the joint. Otherwise, the sand core needs to be ground and polished or repaired. The key control points are that the lower end matching surface is attached and flush with the two sand core surfaces, and the upper end is matched with the template. The first sand core 1, the fourth sand core 4 and the fifth sand core 5 are concentric and have the same size 23. This step is the key operation. Since the sand core is slightly deformed or the coating layer is uneven, it will cause the circular arc surface to not match. This is one of the reasons for the size 23 of the concentricity to be out of tolerance in the traditional process. The operator needs to grind and polish the high point or coating flow mark of the joint matching surface, and make the two core joint surfaces E and F and the lower matching surface attached. Here, the two cores need to be operated several times until the joint surface is completely matched. One template is used to combine the divided sand cores to be concentric and completely symmetrical.
[0035] The steel wire clamp is used for clamping, and the template two 14 and the template three 15 are used for rechecking. If the template two 14 does not pass the interference, the fourth sand core 4 and the fifth sand core 5 are ground and polished in shape with sandpaper until they pass. If the template three 15 does not pass the interference, a 150mm file is used to grind and polish the interference part of the sand core until it passes. The core assembly positioning hole and the positioning pin are glued, the core assembly gap is filled with mud, and the steel wire clamp is clamped after baking until the glue is hardened, and the core assembly is completed.
[0036] Finally, it should be noted that the above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacements to some technical features, as long as they are within the spirit and principles of the present application. Any modification, equivalent replacement, improvement, etc. made within the scope of the present application shall be included in the protection scope of the present application.
Claims
1. A piston skirt core assembly core plate structure comprising a work turntable (11), characterized in that: The top surface of the work turntable (11) is fixedly connected with a first sand core (1), the left side of the first sand core (1) is fixedly connected with a fourth sand core (4), the right side of the first sand core (1) is fixedly connected with a fifth sand core (5), the top of the fourth sand core (4) is fixedly connected with a second sand core (2), the top of the fifth sand core (5) is fixedly connected with a third sand core (3), the top of the third sand core (3) is fixedly connected with a template one (10), the top of the second sand core (2) is fixedly connected with an adjusting height (12), and the rear side of the second sand core (2) is provided with a template three (15).
2. A piston skirt core building template structure according to claim 1, characterized in that: The right side of the third sand core (3) is fixedly connected with a limiting plate (8).
3. A piston skirt core building template structure as claimed in claim 1, wherein: The inward side of the two third sand cores (3) is fixedly connected with a sealing box paste (9).
4. A piston skirt core building template structure as claimed in claim 3, wherein: The top of the sealing box paste (9) is fixedly connected with a template two (14).
5. A piston skirt core building template structure as claimed in claim 4, wherein: The inner wall of the template two (14) is fixedly connected with a circular frame (6) on the left and right sides.
6. A piston skirt core building template structure as claimed in claim 5, wherein: The inner side of the circular frame (6) is fixedly connected with a concave-convex block (7) on the left and right ends.
7. A piston skirt core building template structure as claimed in claim 6, wherein: The inward side of the concave-convex block (7) is fixedly connected with a C-shaped block (13).
8. A piston skirt core building template structure as claimed in claim 7, characterized in that: The two C-shaped blocks (13) are designed in an arc shape.