V-shaped aluminum cylinder body inner cavity main core positioning device

Abstract

The utility model relates to the technical field of aluminum cylinder body low-pressure casting, in particular to a V-shaped aluminum cylinder body inner cavity main core positioning device which comprises a plurality of main cores and a positioning device, each main core comprises a shaft seat and sand cores obliquely arranged on the two sides of the shaft seat, and the positioning device comprises a supporting frame, a trapezoidal positioning base and a pressing assembly. The positioning base is arranged in the supporting frame, a plurality of clamping grooves are formed in the inclined faces of the two sides of the positioning base, the main core is connected to the positioning base, the sand cores are supported in the clamping grooves, the pressing assemblies are arranged on the two sides of the supporting frame, and the pressing assemblies are obliquely arranged towards the two sides of the positioning base. The pressing assembly comprises a pressing strip and a driving piece for driving the pressing strip to abut against the sand core. According to the utility model, not only is the abrasion in the turnover process avoided, but also the condition that the size of a cylinder hole deviates all around due to an overlarge assembly clearance is avoided.

Description

Technical Field

[0001] This utility model relates to the field of low-pressure casting technology for aluminum cylinders, and in particular to a V-shaped aluminum cylinder inner cavity core positioning device. Background Technology

[0002] Currently, most aluminum alloy casting cylinder blocks produced using low-pressure or gravity casting processes in China are inline 4-cylinder or smaller cylinders. 6-cylinder aluminum cylinder blocks are structurally complex, and their crankshaft cavities and cylinder bores are also formed using sand molds. Due to structural limitations, the conventional crankshaft cavity and cylinder bore sand cores used in casting are mostly assembled and locked using ordinary methods. In existing technologies, multiple sand cores are bonded together on the same support base, or multiple sand cores are locked together with a single locking screw and then placed on the support base. Both bonding and screw locking processes result in wear of the sand cores during turnover, and excessive assembly clearance can cause deviations in the cylinder bore dimensions in the front-to-back and left-to-right directions. Utility Model Content

[0003] In view of the technical problems existing in the background art, the purpose of this utility model is to provide a V-shaped aluminum cylinder inner cavity main core positioning device, which ensures the accuracy of the positioning of the sand core in each direction and ensures the stability of the sand core group after the core is connected.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] A V-shaped aluminum cylinder inner cavity main core positioning device includes several main cores and a positioning device. The main core includes a bearing seat and sand cores inclinedly arranged on both sides of the bearing seat. The positioning device includes a support frame, a trapezoidal positioning base, and a clamping assembly. The positioning base is disposed inside the support frame, and several slots are provided on the inclined surfaces on both sides of the positioning base. The main cores are connected to the positioning base and the sand cores are supported in the slots. The clamping assembly is disposed on both sides of the support frame and is inclined toward both sides of the positioning base. The clamping assembly includes a clamping bar and a driving member that drives the clamping bar to abut against the sand core.

[0006] Preferably, the upper end of the bearing seat is provided with a positioning groove, and when several main cores are connected, several positioning grooves are spliced ​​together.

[0007] Preferably, the support frame is provided with positioning posts around its perimeter, and the positioning device also includes an upper sand-shooting plate, which is detachably inserted into the positioning posts.

[0008] Preferably, one end of the upper sand-shooting plate is provided with a sand-shooting barrel that fits into the positioning groove.

[0009] Preferably, the positioning device further includes an air blowing plate, one end of which is provided with an air blowing nozzle for blowing air onto the main core.

[0010] Preferably, the air nozzle is connected inside the sand-shooting barrel and extends through the sand-shooting barrel into the positioning groove.

[0011] This utility model has the following advantages and beneficial effects:

[0012] In this invention, the positioning base ensures the accuracy of the sand core group's positioning in all directions, and the clamping assembly ensures the stability of the sand core group after connection, guaranteeing dimensional stability during subsequent transfer. This not only prevents wear during handling but also avoids deviations in cylinder bore dimensions due to excessive assembly clearance. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of a V-shaped aluminum cylinder inner cavity main core positioning device provided for this utility model;

[0014] Figure 2 This is a schematic diagram showing the connection of the support frame, positioning base, and clamping assembly of a V-shaped aluminum cylinder inner cavity main core positioning device provided for this utility model;

[0015] Figure 3 This is a schematic diagram of the main core structure of a V-shaped aluminum cylinder inner cavity main core positioning device provided for this utility model;

[0016] Figure 4 This is a schematic diagram of the upper sand-shooting plate structure of a V-shaped aluminum cylinder inner cavity main core positioning device provided for this utility model;

[0017] Figure 5 This is a cross-sectional view of the connection between the upper sand-shooting plate and the air-blowing plate of a V-shaped aluminum cylinder inner cavity main core positioning device provided for this utility model;

[0018] Figure 6 This is an exploded view of a V-shaped aluminum cylinder inner cavity main core positioning device provided for this utility model;

[0019] Icons: 1-Support frame, 101-Positioning column, 2-Positioning base, 21-Slot, 3-Pressure frame, 31-Cylinder, 32-Pressure bar, 33-Protrusion, 4-Main core, 41-Shaft seat, 42-Sand core, 43-Positioning groove, 5-Upper sand-shooting plate, 51-Sand-shooting barrel, 6-Air-blowing plate, 61-Air-blowing nozzle. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] Example

[0023] like Figure 1-6 As shown, a V-shaped aluminum cylinder inner cavity main core positioning device includes several main cores 4 and a positioning device. The main core 4 includes a bearing 41 and sand cores 42 inclinedly arranged on both sides of the bearing 41. The positioning device includes a support frame 1, an air blowing plate 6, an upper sand shooting plate 5, a trapezoidal positioning base 2 and a clamping assembly. The support frame 1 is a frame structure, which greatly reduces the overall weight of the equipment and facilitates the observation of the connection of the internal structure during the positioning process.

[0024] like Figure 1 , 2 As shown in Figures 3, 5, and 6, the positioning base 2 is set inside the support frame 1. The cross-section of the positioning base 2 is trapezoidal. Several slots 21 are provided on the inclined surfaces on both sides of the positioning base 2. The slots 21 are similar in shape to the sand core 42. The spacing between each slot 21 is fixed. The main core 4 is connected to the upper end of the positioning base 2 and the sand core 42 is supported in the slots 21. The upper end of the bearing 41 is provided with a positioning groove 43. When several main cores 4 are connected to the positioning base 2, the main cores 4 will not be able to deflect, and several positioning grooves 43 are spliced ​​together.

[0025] like Figure 1 , 2 As shown in Figures 3, 5, and 6, the clamping assembly is arranged on both sides of the support frame 1. The clamping assembly includes a clamping frame 3, a clamping strip 32, and a driving component that drives the clamping strip 32 to abut against the sand core 42. The top of the clamping frame 3 is inclined towards both sides of the positioning base 2. The clamping strip 32 and the driving component are arranged at the upper end of the clamping frame 3. The driving component is a cylinder 31, or other telescopic components. The cylinder 31 drives the clamping strip 32 to move towards the inclined surface on both sides of the positioning base 2. One end of the clamping strip 32 is provided with several protrusions 33. The protrusions 33 and the slots 21 are aligned in position and direction. When the main core 4 is connected to the positioning base 2, the cylinder 31 drives the clamping strip 32 to move, so that the protrusions 33 and the main core 4 abut against each other, fixing the main core 4 on the positioning base 2, further maintaining the stability when several main cores 4 are connected, and avoiding dimensional deviations.

[0026] like Figure 1 , 3As shown in Figures 4, 5, and 6, a sand-shooting barrel 51 is provided at one end of the upper sand-shooting plate 5. The bottom shape of the sand-shooting barrel 51 is similar to that of the positioning groove 43 and fits into the positioning groove 43. Positioning posts 101 are provided around the support frame 1. The upper sand-shooting plate 5 is detachably connected to the positioning posts 101. The connection between the upper sand-shooting plate 5 and the positioning posts 101 can ensure that the connection of the upper sand-shooting plate 5 is stable and accurate. At the same time, the sand-shooting barrel 51 is fitted inside the positioning groove 43. The sand-shooting barrel 51 can limit the position of the main core 4, greatly preventing the main core 4 from deflecting during the connection process, making the connection between the main cores 4 more precise.

[0027] like Figure 1 , 3 As shown in Figures 4, 5, and 6, one end of the air blowing plate 6 is provided with an air blowing nozzle 61 for blowing air onto the main core 4. The air blowing nozzle 61 is set in a groove similar in shape to the sand-shooting barrel 51. When the air blowing plate 6 is connected above the upper sand-shooting plate 5, the groove extends into the sand-shooting barrel 51. The upper sand-shooting plate 5 and the air blowing plate 6 are connected by an interlocking method, which is not only convenient and efficient in the connection process, but also maintains high precision during the connection. The air blowing nozzle 61 is connected inside the sand-shooting barrel 51 and passes through the sand-shooting barrel 51 to be connected above the positioning groove 43, which facilitates sand shooting from the direction of the air blowing nozzle 61 to connect several main cores 4 together.

[0028] When sand-shooting the main core 4, several main cores 4 are placed on the positioning base 2, and the sand core 42 is engaged in the slot 21. The cylinder 31 is driven to work, and the cylinder 31 pushes the clamping strip 32 to move toward the position of the sand core 42, so that the protrusion 33 and the sand core 42 abut against each other, fixing the position of the main core 4. The upper sand-shooting plate 5 and the support frame 1 are aligned and connected above the main core 4 and close to the main core 4. The sand-shooting barrel 51 extends into the positioning groove 43, further strengthening the connection strength between the main cores 4 and preventing displacement during the connection process. The air-blowing plate 6 is connected to the upper sand-shooting plate 5, so that the air-blowing nozzle 61 extends into the sand-shooting barrel 51 and is aligned with the positioning groove 43. Sand is shot into the air-blowing nozzle 61 to fill the positioning groove 43, so that several main cores 4 are connected into one.

[0029] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A V-shaped aluminum cylinder inner cavity main core positioning device, comprising a plurality of main cores and a positioning device, wherein the main core includes a bearing seat and sand cores inclinedly disposed on both sides of the bearing seat, characterized in that, The positioning device includes a support frame, a trapezoidal positioning base, and a clamping assembly. The positioning base is located inside the support frame, and several slots are provided on the inclined surfaces on both sides of the positioning base. The main core is connected to the positioning base, and the sand core is supported in the slots. The clamping assembly is located on both sides of the support frame and is inclined towards both sides of the positioning base. The clamping assembly includes a clamping strip and a driving component that drives the clamping strip to abut against the sand core.

2. The V-shaped aluminum cylinder inner cavity main core positioning device according to claim 1, characterized in that: The upper end of the bearing seat is provided with a positioning groove, and when several main cores are connected, several positioning grooves are spliced ​​together.

3. The V-shaped aluminum cylinder inner cavity main core positioning device according to claim 1, characterized in that: The support frame is provided with positioning posts around its perimeter, and the positioning device also includes an upper sand-shooting plate, which is detachably inserted into the positioning posts.

4. The V-shaped aluminum cylinder inner cavity main core positioning device according to claim 3, characterized in that: One end of the upper sand-shooting plate is provided with a sand-shooting barrel that fits into the positioning groove.

5. The V-shaped aluminum cylinder inner cavity main core positioning device according to claim 1, characterized in that: The positioning device also includes an air blowing plate, one end of which is provided with an air blowing nozzle for blowing air onto the main core.

6. The V-shaped aluminum cylinder inner cavity main core positioning device according to claim 5, characterized in that: The air nozzle is connected inside the sand-shooting barrel and passes through the sand-shooting barrel to be connected above the positioning groove.

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