Form-following type sand core assembling tool

Abstract

An upper oil pool sand core is provided with a lower oil pool sand core and a small water channel sand core, and the lower oil pool sand core is provided with an oil return hole sand core assembling and positioning block and a small oil channel sand core assembling and positioning block. A left small oil duct sand core, an oil return hole sand core and a middle and small oil duct sand core are respectively arranged on the lower oil pool sand core and on the side edge of the oil return hole sand core assembling and positioning block, and a right small oil duct sand core is arranged on the lower oil pool sand core and on the left side of the small oil duct sand core assembling and positioning block; and a small water channel sand core assembly positioning block is arranged on the upper oil pool sand core and above the small water channel sand core. The oil return hole sand core, the left small oil duct sand core, the middle small oil duct sand core and the right small oil duct sand core are respectively assembled with the lower oil pool sand core through the assembly positioning blocks, the small water duct sand cores are assembled with the upper oil pool sand core, the assembly operation among the sand cores is convenient and fast, the assembly precision is high, the labor intensity of operators is greatly reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to a core assembly tooling, specifically to a core assembly tooling for sand cores required in die casting of aluminum alloy cylinder heads. Background Art

[0002] The internal structure of a cast aluminum alloy cylinder head is complex in shape and usually consists of an intake passage core, an exhaust passage core, a water jacket core, and an oil sump core. However, when a certain core is complex in shape, in order to meet the mold parting and manufacturing of the core, a certain core will be designed and split into multiple core blocks during design, and after the cores are produced, they will be assembled and then used. In order to meet the dimensional requirements of the cylinder head and ensure the assembly accuracy, a tooling is usually used for auxiliary assembly during core assembly. At present, the design method of the core assembly tooling usually uses some planes on the core for multi-directional (X direction, Z direction, Y direction) limit (positioning) design in the horizontal, height, and front-back directions. Therefore, this tooling with multi-directional design not only has the disadvantages of large volume, high cost, and difficult operation, but also is more inapplicable when the core is complex and irregular in shape. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies in technology and provide a form-following core assembly tooling for sand cores that is convenient and fast in assembly operation and has high fitting accuracy of each core after assembly.

[0004] The purpose of the present invention is achieved through the following technical solutions: A form-following core assembly tooling for sand cores, including an upper oil sump core, on which a lower oil sump core and a small water channel core are installed; on the lower oil sump core, an oil return hole core assembly positioning block and a small oil channel core assembly positioning block are installed; on the lower oil sump core and on the left side of the oil return hole core assembly positioning block, a left small oil channel core and an oil return hole core are installed; on the lower oil sump core and on the right side of the oil return hole core assembly positioning block, a medium and small oil channel core is installed; on the lower oil sump core and on the left side of the small oil channel core assembly positioning block, a right small oil channel core is installed; on one side of the oil return hole core assembly positioning block and the small oil channel core assembly positioning block, a horizontal limit boss, a front-back limit boss, and a height limit boss are respectively provided, and on the other side of each of them, a handle is installed.

[0005] The horizontal limit boss is one and is correspondingly inserted into a groove of the lower oil sump core; the front-back limit boss is one and is cylindrical and is correspondingly inserted into a circular hole of the lower oil sump core; the height limit bosses are four and are respectively located on the sides of the horizontal limit boss and the front-back limit boss.

[0006] On the oiling pool core and above the small water channel core, there is a small water channel core assembly positioning block. On one side of the small water channel core assembly positioning block, there are respectively a small water channel horizontal limiting boss, a small water channel height limiting boss, and a small water channel front-back limiting boss. There are two small water channel horizontal limiting bosses, which are located in the middle of the top of the small water channel core assembly positioning block and correspondingly inserted into the groove of the oiling pool core. There are two small water channel height limiting bosses, which are located at the bottom of the small water channel core assembly positioning block and are in contact and limited with the oiling pool core. There are four small water channel front-back limiting bosses, which are located on the sides of the small water channel horizontal limiting boss and the small water channel height limiting boss. The small water channel horizontal limiting boss, the small water channel height limiting boss, and the small water channel front-back limiting boss together form a claw-like structure. There is a concave surface between the small water channel horizontal limiting bosses and it is in contact with the small water channel core.

[0007] After adopting the structure of the present invention, through the arrangement of the oil return hole core assembly positioning block and the small oil channel core assembly positioning block, the oil return hole core, the left, middle, and right small oil channel cores are respectively assembled with the lower oiling pool core, and through the arrangement of the small water channel core assembly positioning block, the small water channel core is assembled with the oiling pool core. The assembly operation between each core is light, fast, and has high assembly accuracy, greatly reducing the labor intensity of the operator and improving the work efficiency. Description of the Drawings

[0008] Figure 1 It is a schematic structural diagram of the present invention.

[0009] Figure 2 is Figure 1 a schematic structural diagram of the oil return hole core assembly positioning block in

[0010] Figure 3 is Figure 1 a schematic structural diagram of the small oil channel core assembly positioning block in

[0011] Figure 4 is Figure 1 a schematic structural diagram of the small water channel core assembly positioning block in

[0012] Figure 5 is Figure 1 a schematic structural diagram of the oiling pool core in Detailed Embodiments

[0013] The present invention will be further described below in conjunction with the drawings and the detailed embodiments.

[0014] Referring to Figures 1 to 5It can be seen that the core assembly tooling of the present invention for form sand cores includes an upper oil sump core 1 (like a base). On the upper oil sump core 1, a lower oil sump core 2 (at the front of the upper oil sump core 1) and a small water channel core 3 (at the middle of the front side of the upper oil sump core 1) are respectively installed. On the lower oil sump core 2, an oil return hole core assembly positioning block 801 (at the left part, movable and detachable) and a small oil channel core assembly positioning block 802 (at the right part, movable and detachable) are installed. On the lower oil sump core 2 and at the left side of the oil return hole core assembly positioning block 801, a left small oil channel core 5 (upper position, conforming to the upper left side of the oil return hole core assembly positioning block 801) and an oil return hole core 4 (lower position, conforming to the lower left side of the oil return hole core assembly positioning block 801) are installed. On the lower oil sump core 2 and at the right side of the oil return hole core assembly positioning block 801, a middle and small oil channel core 6 (conforming to the right side of the oil return hole core assembly positioning block 801) is installed. On the lower oil sump core 2 and at the left side of the small oil channel core assembly positioning block 802, a right small oil channel core 7 (conforming to the left side of the small oil channel core assembly positioning block 802) is installed.

[0015] On one side (i.e., the front side) of the oil return hole core assembly positioning block 801 and the small oil channel core assembly positioning block 802, a horizontal limiting boss 8011 (in the X direction, one, at the middle of the top, corresponding to be inserted into the groove of the lower oil sump core 2), a front and rear limiting boss 8013 (in the Y direction, one, at the middle or at the middle of the bottom, cylindrical and corresponding to be inserted into the circular hole of the lower oil sump core 2 for front and rear positioning and horizontal auxiliary positioning), and a height limiting boss 8012 (in the Z direction, four, with different heights, slightly different conforming shapes and respectively at the sides of the horizontal limiting boss 8011 and the front and rear limiting boss 8013, playing a role in limiting in the height direction) are respectively provided. On the other side (i.e., the back side) of them, handles 8014 are installed.

[0016] Such as Figure 1 、 Figure 4As shown, a small water channel core assembly positioning block 803 is installed on the upper oil sump core 1 and above (side upper) the small water channel core 3. On one side (i.e., the front side) of the small water channel core assembly positioning block 803, there are respectively provided a small water channel horizontal limit boss 8031 (in the X direction, two, at the middle of the top of the small water channel core assembly positioning block 803 and correspondingly inserted into the groove of the upper oil sump core), a small water channel height limit boss 8034 (in the Z direction, two, at the bottom of the small water channel core assembly positioning block 803 and in contact limit with the upper oil sump core 1), and small water channel front and rear limit bosses 8033 (in the Y direction, four, with slightly different follow - shaped shapes and located on the sides of the small water channel horizontal limit boss 8031 and the small water channel height limit boss 8034). The other side (the back side) can be flat for convenient finger pressing. In addition, it should be particularly noted that due to the structural limitations of each core, only one side of the small water channel front and rear limit boss 8033 has a limit. During use, the operator needs to push the back side of the small water channel core assembly positioning block with the thumb to make the small water channel front and rear limit boss on its front side stick to the upper oil sump core 1, so as to ensure the limit in the front and rear directions. On one side (i.e., the front side) of the small water channel core assembly positioning block 803, there is a recessed surface 8032 (following the shape of the top side of the small water channel core 3) between the small water channel horizontal limit bosses 8031 and is in contact with the small water channel core 3 (the operator needs to hold the top of the small water channel core 3 with the index finger to ensure that the top side of the small water channel core 3 is in contact with the recessed surface 8032). The small water channel horizontal limit boss 8031, the small water channel height limit boss 8034, and the small water channel front and rear limit bosses 8033 as a whole form a claw - like structure, which is more convenient for limiting.

[0017] The working principle of the present invention is as follows: First, the lower oil sump core 2 is assembled on the upper oil sump core 1. Then, the return oil hole core assembly positioning block 801 and the small oil passage core assembly positioning block 802 are placed at the tooling positioning positions of the lower oil chamber core 2. Next, the lower end of the return oil hole core 4 is inserted into the positioning groove of the upper oil sump core 1 (hot melt adhesive needs to be applied for fixation), and its upper end abuts against the conforming limiting surface of the return oil hole core assembly positioning block 801. Then, the lower ends of the left small oil passage core 5, the middle small oil passage core 6, and the right small oil passage core 7 are sequentially inserted into the corresponding positioning grooves of the lower oil sump core 2 (hot melt adhesive needs to be applied for fixation), and the upper ends of the left small oil passage core 5, the middle small oil passage core 6, and the right small oil passage core 7 respectively abut against the corresponding conforming limiting surfaces on the return oil hole core assembly positioning block 801 and the small oil passage core assembly positioning block 802. Next, the lower end of the small water passage core 3 is inserted into the corresponding positioning groove of the upper oil sump core 1 (hot melt adhesive needs to be applied for fixation), and then the operator needs to place the small water passage core assembly positioning block 803 into the corresponding positioning groove of the upper oil sump core 1 within 10 s, and before the hot melt adhesive cures, make the upper end of the small water passage core 3 abut against the conforming limiting surface of the claw-shaped structure (semi-closed type, formed by multiple bosses and an intermediate groove to form a claw-shaped structure) of the small water passage core assembly positioning block 803. After all the assemblies are completed, all the return oil hole core assembly positioning blocks, small oil passage core assembly positioning blocks, and small water passage core assembly positioning blocks are removed.

[0018] Further, the return oil hole core assembly positioning block 801 is positioned at the tooling of the lower oil sump core 2 by using a conforming protrusion or groove designed according to the contour of the lower oil chamber core 2, and the contour tolerance of the selected positioning surface is ≤0.15 mm. Similarly, the small oil passage core assembly positioning block 802 and the small water passage core assembly positioning block 803 are also designed conformingly according to the contours of the lower oil sump core 2 and the upper oil sump core 1 respectively (which can be adjusted according to the actual situation). Further, the corresponding limiting surfaces on the return oil hole core assembly positioning block 801, the corresponding limiting surfaces on the small oil passage core assembly positioning block 802, and the corresponding limiting surfaces on the small water passage core assembly positioning block 803 are all designed conformingly according to the contours of the respective return oil holes, small water passage cores, and left, middle, and right small oil passage cores. During assembly, the operator needs to keep the upper ends of the relevant cores close to the tooling positioning surface for ≥20 s to prevent the hot melt adhesive from not curing, resulting in deviation of the core position. The return oil hole core assembly positioning block 801, the small oil passage core assembly positioning block 802, and the small water passage core assembly positioning block 803 are all made of aluminum, which is not only wear-resistant but also ensures assembly accuracy. Compared with the steel used in general tooling production, it is also small in weight and convenient for operation.

[0019] The beneficial effects brought by adopting the above technical solutions are that the operation is light, fast, with high precision, greatly reducing the labor intensity of the operators and improving the work efficiency.

Claims

1. The core assembling tool for the shaped core includes an upper oil sump core, and a lower oil sump core and a small water channel core are installed on the upper oil sump core. It is characterized in that: An oil return hole core assembly positioning block and a small oil passage core assembly positioning block are installed on the lower oil sump core. A left small oil passage core and an oil return hole core are installed on the lower oil sump core and on the left side of the oil return hole core assembly positioning block. A medium and small oil passage core is installed on the lower oil sump core and on the right side of the oil return hole core assembly positioning block. A right small oil passage core is installed on the lower oil sump core and on the left side of the small oil passage core assembly positioning block. Horizontal limiting protrusions, front and rear limiting protrusions, and height limiting protrusions are respectively provided on one surface of the oil return hole core assembly positioning block and the small oil passage core assembly positioning block, and handles are installed on the other surface of each of them.

2. The core assembly tool for form-following sand cores according to claim 1, characterized in that: One horizontal limiting protrusion is correspondingly inserted into the groove of the lower oil sump core. One front and rear limiting protrusion is cylindrical and is correspondingly inserted into the circular hole of the lower oil sump core. Four height limiting protrusions are respectively located on the sides of the horizontal limiting protrusion and the front and rear limiting protrusion.

3. The core assembly tooling for the shaped sand cores according to claim 1, wherein: A small water passage core assembly positioning block is installed on the upper oil sump core and above the small water passage core. A small water passage horizontal limiting protrusion, a small water passage height limiting protrusion, and a small water passage front and rear limiting protrusion are respectively provided on one surface of the small water passage core assembly positioning block.

4. The core assembly tool for the shaped sand core according to claim 3, characterized in that: Two small water passage horizontal limiting protrusions are located in the middle of the top of the small water passage core assembly positioning block and are correspondingly inserted into the groove of the upper oil sump core. Two small water passage height limiting protrusions are located at the bottom of the small water passage core assembly positioning block and are used for fitting and limiting with the upper oil sump core. Four small water passage front and rear limiting protrusions are located on the sides of the small water passage horizontal limiting protrusion and the small water passage height limiting protrusion.

5. The core-assembling tool for the free-form sand core according to claim 4, wherein: A concave surface is provided between the small water passage horizontal limiting protrusions and is in contact with the small water passage core.

6. The core assembly tooling for the free-form sand core according to claim 5, characterized in that: The small water passage horizontal limiting protrusion, the small water passage height limiting protrusion, and the small water passage front and rear limiting protrusion integrally form a claw-shaped structure.

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