Automatic sand core positioning device and sand core assembling system

Abstract

The utility model provides an automatic sand core positioning device and a sand core assembling system. The automatic sand core positioning device comprises a rack and a pressing device. A sand core supporting platform and a sand core assembling space are formed on the rack. The pressing device comprises a plurality of pressing blocks and driving devices corresponding to the pressing blocks. The driving device can drive the pressing block to stretch out and draw back in the sand core assembling space. The sand cores are assembled in the sand core supporting platform and the sand core assembling space and then are pressed by the pressing device, so that full-automatic core assembling is realized, and the stability and the precision of sand core combination are improved.

Description

Technical Field

[0001] The present application relates to the field of casting technology, and in particular to an automatic sand core positioning device and a sand core assembly system. Background Art

[0002] With the increasing requirements for automobile lightweight and anti-collision safety, the front engine compartment of traditional automobiles is currently composed of high-strength steel stamping parts with different performances welded together to form a cavity structure to ensure rigidity and strength. After the welding of the front engine compartment is completed, more than 500 welding points will be generated.

[0003] In order to reduce welding points and improve strength, the integrated front cabin is an inevitable choice for lightweight and anti-collision safety. By integrating the originally scattered multiple stamped steel parts into a solid whole, it not only optimizes the production process, but also improves the overall structural strength. During the integration process, the traditional core assembly uses multiple sand cores to be combined one by one, and the combination errors continue to accumulate, resulting in large cumulative errors after the core assembly is completed. The stability and combination accuracy of the overall sand core combination are poor, and mass production cannot meet the product size, wall thickness and weight requirements.

[0004] Therefore, it is necessary to design a sand core automatic positioning device and a sand core assembly system that solve the above technical problems. Utility Model Content

[0005] The present application provides a sand core automatic positioning device and a sand core assembly system, which improve the stability and precision of the sand core assembly.

[0006] According to the first aspect of the embodiments of the present specification, there is provided an automatic sand core positioning device, which comprises a stand and a clamping device; a sand core supporting platform and a sand core assembly space are formed on the stand; the clamping device comprises a plurality of pressing blocks and a driving device corresponding to the plurality of pressing blocks; the driving device can drive the pressing blocks to extend and retract in the sand core assembly space.

[0007] Furthermore, the stand also includes a top plate and a plurality of support columns, and the plurality of support columns are arranged between the sand core support platform and the top plate; the plurality of support columns are arranged at the four corners of the sand core support platform, and the area enclosed by the sand core support platform, the top plate and the plurality of support columns forms the sand core assembly space.

[0008] Furthermore, the clamping device also includes a mounting plate, the driving device includes a cylinder and a telescopic rod, the mounting plate can be positioned on the sand core supporting platform, the cylinder is fixed on the mounting plate, one end of the telescopic rod is located in the cylinder, and the other end of the telescopic rod is connected to the pressing block.

[0009] Further, the plurality of pressing blocks include a plurality of lateral pressing blocks arranged around the sand core assembly space, and the plurality of lateral pressing blocks move in a horizontal direction; the plurality of lateral pressing blocks include a front pressing block, a rear pressing block, a left pressing block and a right pressing block and are located on four sides of the sand core assembly space;

[0010] and / or,

[0011] The plurality of pressing blocks include an upper pressing block arranged at the upper part of the sand core assembly space, and the upper pressing block is telescopic in the vertical direction;

[0012] and / or,

[0013] The plurality of pressing blocks include an oblique pressing block which is arranged obliquely with respect to the sand core supporting platform.

[0014] Furthermore, an automatic rotating device is provided at the bottom of the stand, and the automatic rotating device can drive the sand core supporting platform to rotate;

[0015] and / or,

[0016] The clamping device is detachably arranged on the stand, and the clamping device can be assembled and disassembled with the sand core supporting platform through an automatic installation mechanism.

[0017] According to the second aspect of the embodiment of this specification, a sand core assembly system is provided, comprising the sand core automatic positioning device described in the first aspect and a plurality of sand cores, the plurality of sand cores being placed on the sand core support platform, and the plurality of pressing blocks being respectively abutted against the outer surfaces of the plurality of sand cores.

[0018] Further, the plurality of sand cores include a lower sand core, an upper sand core and four lateral sand cores;

[0019] The lower sand core and the upper sand core are stacked up and down, and the four lateral sand cores are respectively embedded in the sides of the upper sand core and the lower sand core; the lower sand core, the upper sand core and the four lateral sand cores have a cavity;

[0020] and / or,

[0021] A plurality of groups of reinforcing ribs are provided in the cavity;

[0022] and / or,

[0023] A support surface in contact with the pressing block is formed at the opening of the cavity, and the support surface is a plane.

[0024] Furthermore, a through groove for accommodating the lateral sand core is provided at the connection between the lower sand core and the upper sand core;

[0025] The opening of the through groove is provided with a plurality of notches along the circumferential direction, and the lateral sand core is provided with a plurality of protrusions adapted to the notches along the circumferential direction;

[0026] and / or,

[0027] The lateral sand core has a side wall surrounding the mold cavity, a gap between the side wall and the inner wall of the through slot is less than or equal to 0.8 mm, and a shape of the mold cavity opening is consistent with a shape of the through slot opening.

[0028] Furthermore, the sand core assembly system also includes a handling robot, an automatic conveying device and a control cabinet, the sand core automatic positioning device, the handling robot, and the automatic conveying device are all connected to the control cabinet; the automatic conveying device is used to convey the multiple sand cores to a preset position; the handling robot is used to move the multiple sand cores from the automatic conveying device to the sand core support platform respectively.

[0029] Furthermore, it also includes an automatic assembly robot arranged near the sand core automatic positioning device, and the automatic assembly robot is used to assemble the plurality of positioned sand cores.

[0030] The present application has the following beneficial effects: by assembling the sand cores on the sand core support platform and in the sand core assembly space, and then pressing them by a pressing device, fully automated core assembly is achieved, thereby improving the stability and accuracy of the sand core combination.

[0031] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and, together with the description, serve to explain the principles of the specification.

[0033] Figure 1 It is a three-dimensional diagram of the sand core of the present application when it is not fixed in the sand core automatic positioning device;

[0034] Figure 2 It is a three-dimensional diagram of the sand core of the present application in a fixed state in the sand core automatic positioning device;

[0035] Figure 3 It is an exploded view of the sand core of this application;

[0036] Figure 4 It is a three-dimensional diagram of the sand core and screw on this application;

[0037] Figure 5 It is a three-dimensional diagram of the lateral sand core and screw of the present application;

[0038] Figure 6 It is an exploded view of the sand core, bolts and nuts of the present application;

[0039] Figure 7 It is an assembly diagram of the sand core, bolts and nuts of the present application;

[0040] Figure 8 It is a three-dimensional diagram of the sand core assembly system of the present application.

[0041] Description of reference numerals:

[0042] 10-stand; 11-sand core support platform; 12-top plate; 13-support column; 14-sand core assembly space;

[0043] 20-clamping device; 21-pressing block; 211-lateral pressing block; 212-upper pressing block; 22-driving device; 221-cylinder; 222-telescopic rod; 23-mounting plate;

[0044] 30-Transportation robot;

[0045] 40-Automatic conveying device;

[0046] 50-Automatic assembly robot;

[0047] 60-sand core; 61-lower sand core; 62-upper sand core; 621-through groove; 622-notch; 623-first positioning groove; 624-second positioning groove; 63-lateral sand core; 631-protrusion; 632-side wall; 633-screw hole; 601, 602-cavity; 603, 604-reinforcement ribs; 611, 612-support surface;

[0048] 70-screws;

[0049] 81-screw rod; 82-bolt. DETAILED DESCRIPTION

[0050] Here, the technical solutions in the embodiments (or "implementation methods") of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0051] If there are terms involving directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first" and "second" in the embodiments of the present application are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance.

[0052] Next, the embodiments of this specification are described in detail.

[0053] Reference Figure 1 and Figure 2 As shown, the present application discloses an automatic sand core positioning device, which includes a stand 10 and a clamping device 20. A plurality of sand cores 60 are placed on the stand 10 and clamped by the clamping device 20 to achieve fully automated core assembly.

[0054] The stand 10 includes a sand core support platform 11, a top plate 12 and a plurality of support columns 13. An automatic rotating device (not shown in the figure) is provided at the bottom of the stand 10, which can drive the sand core support platform 11 to rotate, so that the direction of the sand core 60 can be flexibly adjusted according to different casting requirements. This makes the core assembly process no longer limited to a single direction, helps to cope with a variety of complex mold shapes and casting requirements, and improves the adaptability of production.

[0055] A plurality of support columns 13 are disposed between the sand core support platform 11 and the top plate 12, and the plurality of support columns 13 are arranged at the four corners of the sand core support platform 11. The area surrounded by the sand core support platform 11, the top plate 12 and the plurality of support columns 13 forms a sand core assembly space 14.

[0056] The clamping device 20 is detachably mounted on the stand 10, and can be assembled and disassembled with the sand core support platform 11 through an automatic installation mechanism, thereby improving the flexibility, efficiency and precision of production. In another embodiment, the clamping device 20 is integrally formed on the stand 10 to improve the stability of the installation position of the clamping device 20.

[0057] The clamping device 20 includes a plurality of pressing blocks 21, a driving device 22 and a mounting plate 23. The driving device 22 can drive the pressing blocks 21 to extend and retract in the sand core assembly space 14. The plurality of pressing blocks 21 include a plurality of lateral pressing blocks 211 arranged around the sand core assembly space 14 and an upper pressing block 212 arranged on the upper part of the sand core assembly space 14. The plurality of lateral pressing blocks 211 include a front pressing block, a rear pressing block, a left pressing block and a right pressing block. The front pressing block, the rear pressing block, the left pressing block and the right pressing block are located on the four sides of the sand core assembly space 14.

[0058] The plurality of lateral pressing blocks 211 and the upper pressing block 212 form a square and are located at the center of the surface of the contacted sand core 60. The plurality of lateral pressing blocks 211 move in the horizontal direction to fix the sand core 60 in the circumferential direction. In addition, the upper pressing block 212 is retracted in the vertical direction to fix the sand core 60 in the vertical direction. The upper pressing block 212 is arranged on the inner side of the top plate 12. In other embodiments, the upper pressing block 212 can also be arranged at other positions or on the top frame.

[0059] In another embodiment, the plurality of lateral pressing blocks 211 and the upper pressing block 212 have the same size as the surface of the sand core 60 they are in contact with, thereby increasing the contact area between the pressing blocks 21 and the sand core 60 and ensuring the stability of the contact.

[0060] In another embodiment not shown, the plurality of pressing blocks 21 include an oblique pressing block that is disposed obliquely with respect to the sand core supporting platform 11 , and the oblique pressing block moves in an oblique direction and fixes the sand core 60 .

[0061] The driving device 22 includes a cylinder 221 and a telescopic rod 222. The mounting plate 23 can be positioned on the sand core supporting platform 11. The cylinder 221 is fixed on the mounting plate 23. One end of the telescopic rod 222 is located in the cylinder 221. The other end of the telescopic rod 222 is connected to the pressing block 21. The sand core 60 is fixed by the extension and retraction of the telescopic rod 222.

[0062] In one embodiment of the present application, Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the plurality of sand cores 60 include a lower sand core 61 , an upper sand core 62 and four lateral sand cores 63 . The lower sand core 61 and the upper sand core 62 are stacked up and down, and the four lateral sand cores 63 are respectively embedded in the sides of the upper sand core 62 and the lower sand core 61 .

[0063] The lower sand core 61, the upper sand core 62 and the four lateral sand cores 63 have cavities 601, 602. A plurality of groups of reinforcing ribs 603, 604 are provided in the cavities 601, 602. The plurality of groups of reinforcing ribs 603, 604 separate the cavities 601, 602 into a plurality of sub-cavities. The reinforcing ribs 603, 604 can strengthen the structural strength of the cavities 601, 602 and reduce the weight of the sand core 60 at the same time.

[0064] Support surfaces 611 , 612 in contact with the pressing block 21 are formed at the openings of the cavities 601 , 602 . The support surfaces 611 , 612 are planes, ensuring that the contact area between the pressing block 21 and the support surfaces 611 , 612 is large, thereby achieving uniformly distributed contact force.

[0065] A through slot 621 for accommodating the lateral sand core 63 is provided at the connection between the lower sand core 61 and the upper sand core 62. A plurality of notches 622 are provided at the opening of the through slot 621 along the circumferential direction. Correspondingly, a plurality of protrusions 631 are provided along the circumferential direction on the lateral sand core 63 to match the notches 622. The cooperation between the notches 622 and the protrusions 631 not only improves the positioning accuracy of the lateral sand core 63, but also increases the stability of the overall connection of the sand core 60. Screw holes 633 are provided on the protrusions 631.

[0066] The lateral sand core 63 has a side wall 632 surrounding the molding cavity 602, and the gap between the side wall 632 and the inner wall of the through groove 621 is less than or equal to 0.8 mm. The shape of the opening of the molding cavity 602 is consistent with the shape of the opening of the through groove 621, so that they can be precisely docked during assembly, and the through groove 621 is blocked to prevent the molten metal in the through groove 621 from flowing out during centrifugal casting.

[0067] The present application realizes fully automated core assembly by assembling the sand core 60 on the sand core support platform 11 and the sand core assembly space 14 and then pressing it with the pressing device 20 , thereby improving the stability and accuracy of the sand core 60 assembly.

[0068] Reference Figure 8 As shown, this embodiment also discloses a sand core assembly system, which includes a sand core automatic positioning device, a handling robot 30, an automatic conveying device 40, an automatic assembly robot 50 and a control cabinet (not shown in the figure). The sand core automatic positioning device, the handling robot 30, and the automatic conveying device 40 are all connected to the control cabinet. The automatic conveying device 40 is used to convey multiple sand cores 60 to a preset position, and the handling robot 30 is used to move multiple sand cores from the automatic conveying device 40 to the sand core support platform 11 respectively.

[0069] The automatic assembly robot 50 is arranged near the sand core automatic positioning device, and is used to assemble the plurality of positioned sand cores 60, thereby ensuring the dimensional stability of the sand cores 60 during transportation. In the embodiment of the present application, the sand core 60 is fixed by screws 70 or screw rods 81 and bolts 82 to assemble the sand core 60.

[0070] The robot involved in the sand core assembly system of the present application includes a mechanical component, a sensor component and a control component. The robot can automatically position and control, is a reprogrammable, multifunctional, multi-degree-of-freedom operating device, and can carry and assemble the sand core 60.

[0071] The present application also discloses a sand core assembly method, and a possible implementation method is shown below. The sand core assembly method includes but is not limited to this.

[0072] Step 1: The handling robot 30 first grabs the lower sand core 61 and places it on the sand core support platform 11, then grabs the upper sand core 62 and places it on the lower sand core 61, and finally rotates the sand core support platform 11, grabs the lateral sand core 63 and places it at the connection between the lower sand core 61 and the upper sand core 62, so that the lower sand core 61, the upper sand core 62 and the lateral sand core 63 are spliced ​​together.

[0073] Step 2: The cylinder 221 moves the upper pressing block 212 to press the supporting surface 611 of the upper sand core 62 and continues to press.

[0074] Step 3: The cylinder 221 moves the lateral pressing block 211 to press the supporting surface 612 of the lateral sand core 63 and continues to press.

[0075] Step 4: The automatic assembly robot 50 clamps the screws 70 and fixes the upper sand core 62 and the lower sand core 61 from top to bottom through the screws 70 .

[0076] Step 5: The automatic assembly robot 50 again grips the screw 70 and fixes the lateral sand core 63 to the lower sand core 61 and the upper sand core 62 from the side through the screw 70.

[0077] Step 6: After all the sand cores 60 are fixed with screws 70, the cylinder 221 drives the lateral pressing block 211 and the upper pressing block 212 to retreat, and the core assembly is completed.

[0078] In another embodiment, the lateral sand core 63 in step 1 may also be placed on the upper sand core 62 or the lower sand core 61 .

[0079] In another embodiment, step four and step five may also use a screw 81 and a bolt 82. The automatic assembly robot 50 places the screw 81 in the first positioning groove 623, and then places the bolt 82 in the second positioning groove 624 to fix the upper sand core 62 and the lower sand core 61 from top to bottom.

[0080] In another embodiment, during the positioning in step 2 and step 3, the upper pressing block 212 and the lateral pressing block 211 may also act simultaneously.

[0081] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without causing conflicts. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A sand core automatic positioning device, characterized in that: It includes a stand and a clamping device; a sand core supporting platform and a sand core assembly space are formed on the stand; the clamping device includes a plurality of clamping blocks and a driving device corresponding to the plurality of clamping blocks; the driving device can drive the clamping blocks to extend and retract in the sand core assembly space.

2. The automatic sand core positioning device according to claim 1, characterized in that: The stand also includes a top plate and a plurality of support columns, wherein the plurality of support columns are disposed between the sand core support platform and the top plate; the plurality of support columns are arranged at the four corners of the sand core support platform, and the area enclosed by the sand core support platform, the top plate and the plurality of support columns forms the sand core assembly space.

3. The automatic sand core positioning device according to claim 1, characterized in that: The clamping device also includes a mounting plate, and the driving device includes a cylinder and a telescopic rod. The mounting plate can be positioned on the sand core supporting platform, the cylinder is fixed on the mounting plate, one end of the telescopic rod is located in the cylinder, and the other end of the telescopic rod is connected to the pressing block.

4. The automatic sand core positioning device according to claim 3, characterized in that: The plurality of pressing blocks include a plurality of lateral pressing blocks arranged around the sand core assembly space, and the plurality of lateral pressing blocks move in a horizontal direction; the plurality of lateral pressing blocks include a front pressing block, a rear pressing block, a left pressing block and a right pressing block and are located on four sides of the sand core assembly space; and / or, The plurality of pressing blocks include an upper pressing block arranged at the upper part of the sand core assembly space, and the upper pressing block is telescopic in the vertical direction; and / or, The plurality of pressing blocks include an oblique pressing block which is arranged obliquely with respect to the sand core supporting platform.

5. The automatic sand core positioning device according to claim 1, characterized in that: An automatic rotating device is provided at the bottom of the stand, and the automatic rotating device can drive the sand core supporting platform to rotate; And / or, the clamping device is detachably arranged on the stand, and the clamping device can be assembled and disassembled with the sand core supporting platform through an automatic installation mechanism.

6. A sand core assembly system, characterized in that: It comprises a sand core automatic positioning device as described in any one of claims 1 to 5 and a plurality of sand cores, wherein the plurality of sand cores are placed on the sand core supporting platform, and the plurality of pressing blocks are respectively abutted against the outer surfaces of the plurality of sand cores.

7. The sand core assembly system according to claim 6, characterized in that: The multiple sand cores include a lower sand core, an upper sand core and four lateral sand cores; the lower sand core, the upper sand core and the four lateral sand cores have a cavity; The lower sand core and the upper sand core are stacked up and down, and the four lateral sand cores are respectively embedded in the sides of the upper sand core and the lower sand core; and / or, A plurality of groups of reinforcing ribs are provided in the cavity; and / or, A support surface in contact with the pressing block is formed at the opening of the cavity, and the support surface is a plane.

8. The sand core assembly system according to claim 7, characterized in that: A through groove for accommodating the lateral sand core is provided at the connection between the lower sand core and the upper sand core; The opening of the through groove is provided with a plurality of notches along the circumferential direction, and the lateral sand core is provided with a plurality of protrusions adapted to the notches along the circumferential direction; and / or, The lateral sand core has a side wall surrounding the mold cavity, a gap between the side wall and the inner wall of the through slot is less than or equal to 0.8 mm, and a shape of the mold cavity opening is consistent with a shape of the through slot opening.

9. The sand core assembly system according to claim 6, characterized in that: The sand core assembly system also includes a handling robot, an automatic conveying device and a control cabinet. The sand core automatic positioning device, the handling robot and the automatic conveying device are all connected to the control cabinet; the automatic conveying device is used to convey the multiple sand cores to a preset position; the handling robot is used to move the multiple sand cores from the automatic conveying device to the sand core support platform respectively.

10. The sand core assembly system according to claim 9, characterized in that: It also includes an automatic assembly robot arranged near the sand core automatic positioning device, and the automatic assembly robot is used to assemble the plurality of positioned sand cores.

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