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 invention relates to a sand core assembly tool, in particular to a sand core assembly tool required for casting sand cores in a metal mold for casting an aluminum alloy cylinder head. Background Art

[0002] The internal structure of a cast aluminum alloy cylinder head is complex and typically consists of an intake sand core, an exhaust sand core, a water jacket sand core, and an oil sump sand core. However, when a sand core has a complex shape, to accommodate the mold parting and production of the sand core mold, the sand core is split into multiple sand core blocks during design. These blocks are then assembled and reused after the sand cores are produced. To meet the cylinder head's dimensional requirements and ensure assembly accuracy, tooling is often used to assist in sand core assembly. Currently, core assembly tooling typically utilizes planes on the sand core for multi-directional positioning (positioning) in the horizontal (X-direction), vertical (Z-direction), and front-to-back (Y-direction) directions. This multi-directional tooling design not only has drawbacks such as large size, high cost, and difficulty in operation, but is also particularly unsuitable for complex and irregular sand core shapes. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned technologies and to provide a flexible sand core assembly tool which has the advantages of light and quick assembly operation and high matching precision of the sand cores after assembly.

[0004] The objectives of the present invention are achieved through the following technical solutions: a free-standing sand core assembly tooling includes an upper oil pool sand core, a lower oil pool sand core and a small water channel sand core are installed on the upper oil pool sand core, an oil return hole sand core assembly positioning block and a small oil channel sand core assembly positioning block are installed on the lower oil pool sand core, a left small oil channel sand core and an oil return hole sand core are installed on the lower oil pool sand core and on the left side of the oil return hole sand core assembly positioning block, small and medium oil channel sand cores are installed on the lower oil pool sand core and on the right side of the oil return hole sand core assembly positioning block, and a right small oil channel sand core is installed on the lower oil pool sand core and on the left side of the small oil channel sand core assembly positioning block.

[0005] A horizontal limit boss, front and rear limit bosses, and a height limit boss are each provided on one side of the oil return hole sand core assembly and positioning block and the small oil channel sand core assembly and positioning block. There is one horizontal limit boss, which inserts into the groove of the lower oil sump sand core. The front and rear limit bosses are cylindrical and insert into the circular hole of the lower oil sump sand core. There are four height limit bosses, located on the sides of the horizontal limit boss and the front and rear limit bosses.

[0006] A small water channel sand core assembly and positioning block is installed on the upper oil pool sand core and above the small water channel sand core. A small water channel horizontal limiting boss, a small water channel height limiting boss, and a small water channel front and rear limiting bosses are respectively provided on one surface of the small water channel sand core assembly and positioning block. There are two small water channel horizontal limiting bosses, which are located at the top middle of the small water channel sand core assembly and positioning block and are correspondingly inserted into the groove of the upper oil pool sand core. There are two small water channel height limiting bosses, which are located at the bottom of the small water channel sand core assembly and positioning block to fit and limit the upper oil pool sand core. There are four small water channel front and rear 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 and rear limiting bosses form a claw-shaped structure as a whole. A concave surface is provided between the small water channel horizontal limiting bosses to fit and connect with the small water channel sand core.

[0007] After adopting the structure of the present invention, the oil return hole sand core, the left, middle and right small oil channel sand cores are respectively assembled with the lower oil pool sand core by setting the oil return hole sand core assembly positioning block and the small oil channel sand core assembly positioning block, and the small water channel sand core is assembled with the upper oil pool sand core by setting the small water channel sand core assembly positioning block. The assembly operation between the sand cores is light and fast, and the assembly accuracy is high, which greatly reduces the labor intensity of the operator and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0009] Figure 2 for Figure 1 Schematic diagram of the structure of the oil return hole sand core assembly positioning block.

[0010] Figure 3 for Figure 1 Schematic diagram of the structure of the small oil channel sand core assembly positioning block.

[0011] Figure 4 for Figure 1 Schematic diagram of the structure of the small waterway sand core assembly positioning block.

[0012] Figure 5 for Figure 1 Schematic diagram of the structure of the upper oil pool sand core. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0014] Reference Figures 1 to 5It can be seen that the present invention comprises an upper oil pool sand core 1 (like a base), on which are respectively mounted a lower oil pool sand core 2 (at the front of the upper oil pool sand core 1) and a small water channel sand core 3 (at the middle of the front side of the upper oil pool sand core 1), and on which are mounted an oil return hole sand core assembly positioning block 801 (at the left, movable and detachable) and a small oil channel sand core assembly positioning block 802 (at the right, movable and detachable), and on which are mounted a left oil pool sand core 2 and on the left side of the oil return hole sand core assembly positioning block 801. A small oil channel sand core 5 (upper position, following the upper left side of the oil return hole sand core assembly positioning block 801), an oil return hole sand core 4 (lower position, following the lower left side of the oil return hole sand core assembly positioning block 801), small and medium oil channel sand cores 6 (following the right side of the oil return hole sand core assembly positioning block 801) are installed on the lower oil pool sand core 2 and on the right side of the oil return hole sand core assembly positioning block 801, and a right small oil channel sand core 7 (following the left side of the small oil channel sand core assembly positioning block 802) is installed on the lower oil pool sand core 2 and on the left side of the small oil channel sand core assembly positioning block 802.

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

[0016] like Figure 1 、 Figure 4As shown, a small water channel sand core assembly positioning block 803 is installed on the upper oil pool sand core 1 and above the small water channel sand core 3 (above the side), and on one side (i.e. the front) of the small water channel sand core assembly positioning block 803 are respectively provided with a small water channel horizontal limiting boss 8031 ​​(two in the X direction, located in the middle of the top of the small water channel sand core assembly positioning block 803 and correspondingly inserted into the groove of the upper oil pool sand core), a small water channel height limiting boss 8034 (two in the Z direction, located at the bottom of the small water channel sand core assembly positioning block 803 and fitted with the upper oil pool sand core 1), and a small water channel front and rear limiting boss 8033 (four in the Y direction, with slightly different shapes and located on the sides of the small water channel horizontal limiting boss 8031 ​​and the small water channel height limiting boss 8034). The other side (the back) can be flat and convenient for finger pressing. Furthermore, it's important to note that due to the structural limitations of each sand core, the front and rear stop bosses 8033 of the small waterway only have one side for position control. During use, the operator needs to use their thumb to push the back of the small waterway sand core assembly positioning block so that the front and rear stop bosses of the small waterway abut against the upper oil pool sand core 1, thereby ensuring its front-to-back position control. On one side (i.e., the front) of the small waterway sand core assembly positioning block 803, between the small waterway horizontal stop bosses 8031, a recessed surface 8032 (which conforms to the top side of the small waterway sand core 3) is provided, which mates with the small waterway sand core 3 (the operator needs to press down on the top of the small waterway sand core 3 with their index finger to ensure that the top side of the small waterway sand core 3 mates with the recessed surface 8032). The small waterway horizontal stop boss 8031, the small waterway height stop boss 8034, and the small waterway front and rear stop bosses 8033 collectively form a claw-like structure, making position control more convenient.

[0017] The working principle of the present invention is as follows: First, assemble the lower oil pool sand core 2 onto the upper oil pool sand core 1. Next, place the oil return hole sand core assembly positioning block 801 and the small oil channel sand core assembly positioning block 802 at the tooling positioning position of the lower oil chamber sand core 2. Then, insert the lower end of the oil return hole sand core 4 into the positioning groove of the upper oil pool sand core 1 (need to be fixed with hot melt glue), and its upper end is pressed against the corresponding conformal limit surface of the oil return hole sand core assembly positioning block 801. Next, insert the lower ends of the left small oil channel sand core 5, the medium and small oil channel sand core 6, and the right small oil channel sand core 7 into the corresponding positioning grooves of the lower oil pool sand core 2 in sequence (need to be fixed with hot melt glue), and the upper ends of the left small oil channel sand core 5, the medium and small oil channel sand core 6, and the right small oil channel sand core 7 are respectively pressed against the corresponding conformal limit surfaces on the oil return hole sand core assembly positioning block 801 and the small oil channel sand core assembly positioning block 802. Next, insert the lower end of the small waterway sand core 3 into the corresponding positioning groove of the upper oil pool sand core 1 (hot melt adhesive is required to secure it). Within 10 seconds, the operator must place the small waterway sand core assembly positioning block 803 into the corresponding positioning groove of the upper oil pool sand core 1. Before the hot melt adhesive solidifies, position the upper end of the small waterway sand core 3 against the conformal limit surface of the claw structure (a semi-closed structure formed by multiple bosses and a central groove) of the small waterway sand core assembly positioning block 803. Once assembly is complete, remove all the oil return hole sand core assembly positioning blocks, small oil channel sand core assembly positioning blocks, and small waterway sand core assembly positioning blocks.

[0018] Furthermore, the oil return hole sand core assembly positioning block 801 is positioned in the tooling for the lower oil sump sand core 2 using contoured protrusions or grooves designed to conform to the lower oil chamber sand core 2, with the selected positioning surface profile tolerance ≤0.15 mm. Similarly, the small oil channel sand core assembly positioning block 802 and the small water channel sand core assembly positioning block 803 are also designed to conform to the contours of the lower oil sump sand core 2 and the upper oil sump sand core 1, respectively (this can be adjusted based on actual conditions). Furthermore, the corresponding limiting surfaces on the oil return hole sand core assembly positioning block 801, the small oil channel sand core assembly positioning block 802, and the small water channel sand core assembly positioning block 803 are all designed to conform to the contours of the respective oil return hole, small water channel sand core, and the left, center, and right small oil channel sand cores. During assembly, the operator must hold the top end of the relevant sand core close to the tooling positioning surface for at least 20 seconds to prevent the hot melt adhesive from not curing and causing deviations in the sand core's positioning accuracy. The oil return hole sand core assembly positioning block 801, the small oil channel sand core assembly positioning block 802, and the small water channel sand core assembly positioning block 803 are all made of aluminum, which is both wear-resistant and ensures assembly accuracy. Compared with the steel used in general tooling production, it is light in weight and easy to operate.

[0019] The beneficial effects brought about by adopting the above technical solution are that the operation is light and fast, the precision is high, the labor intensity of the operator is greatly reduced and the work efficiency is improved.

Claims

1. A sand core assembly tooling for a free-standing type, comprising an upper oil pool sand core, on which a lower oil pool sand core and a small waterway sand core are mounted, characterized in that: An oil return hole sand core assembly positioning block and a small oil channel sand core assembly positioning block are installed on the lower oil pool sand core; a left small oil channel sand core and an oil return hole sand core are installed on the lower oil pool sand core and on the left side of the oil return hole sand core assembly positioning block; medium and small oil channel sand cores are installed on the lower oil pool sand core and on the right side of the oil return hole sand core assembly positioning block; and a right small oil channel sand core is installed on the lower oil pool sand core and on the left side of the small oil channel sand core assembly positioning block.

2. The flexible sand core assembly tool according to claim 1, characterized in that: A horizontal limiting boss, a front and rear limiting boss, and a height limiting boss are respectively arranged on one surface of the oil return hole sand core assembly positioning block and the small oil channel sand core assembly positioning block.

3. The flexible sand core assembly tool according to claim 2, characterized in that: There is one horizontal limit boss which is inserted into the groove of the lower oil pool sand core. There are four height limit bosses which are respectively located on the sides of the horizontal limit boss and the front and rear limit bosses.

4. The flexible sand core assembly tool according to claim 1 or 3, characterized in that: A small water channel sand core assembly positioning block is installed on the upper oil pool sand core and above the small water channel sand core, and a small water channel horizontal limiting boss, a small water channel height limiting boss, and small water channel front and rear limiting bosses are respectively arranged on one surface of the small water channel sand core assembly positioning block.

5. The flexible sand core assembly tool according to claim 4, characterized in that: There are two small water channel horizontal limit bosses, which are located in the middle of the top of the small water channel sand core assembly positioning block and are correspondingly inserted into the groove of the upper oil pool sand core. There are two small water channel height limit bosses, which are located at the bottom of the small water channel sand core assembly positioning block and are fitted and limited with the upper oil pool sand core. There are four small water channel front and rear limit bosses, which are located on the sides of the small water channel horizontal limit boss and the small water channel height limit boss.

6. The flexible sand core assembly tool according to claim 5, characterized in that: A concave surface is provided between the small water channel horizontal limiting bosses and is in close contact with the small water channel sand core.

7. The flexible sand core assembly tool according to claim 6, characterized in that: The small water channel horizontal limiting boss, the small water channel height limiting boss, and the small water channel front and rear limiting bosses are integrally formed into a claw-shaped structure.

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