Green compact adsorption tool

Abstract

The utility model relates to blow molding plastic car oil tank production discloses a kind of blank adsorption tooling including fixed seat, adsorption component, two rotating shafts and two drive components, and the end of fixed seat is set to the end of robot mechanical arm, and adsorption component is set to the other end of fixed seat, and adsorption component includes first adsorption block, second adsorption block and third adsorption block sequentially arranged along blank length direction, two rotating shafts are respectively set to the both ends of second adsorption block, and the end of first adsorption block and third adsorption block close to second adsorption block is respectively hinged on corresponding rotating shaft, and two drive components are respectively set to the side of first adsorption block and third adsorption block away from blank, for cooperation rotating shaft to drive first adsorption block and third adsorption block rotate towards blank direction;The blank adsorption tooling can effectively prevent blank from being stripped due to external vibration, inertial force and other factors during conveying, improve the stability of blank clamping and conveying.

Description

Technical Field

[0001] This utility model relates to the field of blow-molded plastic automotive fuel tank production technology, specifically to a preform adsorption tool. Background Technology

[0002] In the blow molding process of automotive fuel tanks, the blank is the core molding component. Whether it can be stably clamped and accurately transported into the mold cavity after being cut will directly affect the yield of the final product.

[0003] Currently, there are generally two types of fixtures for holding blanks used in automotive fuel tanks. One type uses mechanical structures to drive the grippers and rigidly lock different parts of the blank. However, due to the limitations of the blank material, the rigid clamping method of mechanical grippers can easily cause irreversible damage to the blank, leading to quality problems such as leakage and uneven wall thickness in the subsequent blow molding process, which in turn leads to a decrease in product yield.

[0004] Secondly, negative pressure adsorption fixtures are used. By creating a vacuum negative pressure environment on the fixture surface, atmospheric pressure is used to adsorb the material blank onto the fixture surface. This clamping method can avoid physical damage to the material blank. However, when applied to the adsorption of C-shaped material blanks, traditional negative pressure adsorption fixtures have a limited actual contact area between the adsorption surface and the material blank because the angle of the adsorption surface is not adjustable. In this case, the effective area of ​​the vacuum negative pressure is insufficient, and it is impossible to form a sufficiently large adsorption force between the adsorption surface and the material blank. During the material blank transportation process, especially when subjected to external vibration and inertial forces, the material blank is very likely to detach from the adsorption surface, causing the risk of material detachment. Once material detachment occurs, it will not only cause the currently produced material blanks to be scrapped, but may also interfere with the normal operation of the entire production line, further reducing production efficiency and product yield. Utility Model Content

[0005] The purpose of this invention is to solve at least one of the technical problems existing in the prior art by providing a material preform adsorption fixture. This preform adsorption fixture can increase the adsorption area of ​​the preform, effectively prevent the preform from detaching from the adsorption surface, reduce the scrapping of preforms and production stoppages caused by material detachment, and improve product yield and production efficiency.

[0006] To achieve the above objectives, this utility model provides a material preform adsorption fixture, comprising:

[0007] A fixed base, one end of which is attached to the end of the robot's robotic arm;

[0008] An adsorption assembly is disposed at the other end of the fixed base. The adsorption assembly includes a first adsorption block, a second adsorption block, and a third adsorption block arranged sequentially along the length of the material blank.

[0009] Two rotating shafts are respectively disposed at both ends of the second adsorption block, and the ends of the first adsorption block and the third adsorption block closest to the second adsorption block are respectively hinged to the corresponding rotating shafts;

[0010] Two drive components are respectively disposed on the side of the first adsorption block and the third adsorption block away from the material blank, and are used to cooperate with the rotating shaft to drive the first adsorption block and the third adsorption block to rotate towards the material blank.

[0011] Optionally, the first adsorption block, the second adsorption block, and the third adsorption block are all provided with a negative pressure chamber. The negative pressure chamber has multiple negative pressure holes on the side wall near the material blank. The negative pressure chamber is connected to a vacuum pumping device.

[0012] Optionally, the negative pressure holes are provided in two rows, and the two rows of negative pressure holes are staggered along the length direction of the blank.

[0013] Optionally, the diameter of the negative pressure hole is set to 16 mm, the depth is set to 10 mm, and the number is set to 14.

[0014] Optionally, the drive assembly includes a cylinder and a telescopic mechanism connected to the output end of the cylinder, the telescopic mechanism being connected to the first adsorption block or the third adsorption block.

[0015] Optionally, the drive assembly further includes an angle adjustment linkage mechanism, which includes a first link and a second link. One end of the first link is hinged to one end of the second link, the other end of the first link is connected to the first adsorption block or the third adsorption block, and the other end of the second link is hinged to the fixed base.

[0016] Optionally, the material preform adsorption fixture further includes an adsorption block base, one end of which is fixed to the fixed base, and the other end of which is connected to the second adsorption block.

[0017] Optionally, the material preform adsorption fixture further includes a vacuum tube, one end of which extends through the base of the adsorption block into the negative pressure chamber of the second adsorption block, and the other end of which is connected to the vacuum pumping device.

[0018] Optionally, a three-way valve is provided on the vacuum tube, and the negative pressure chambers of the first adsorption block and the third adsorption block are respectively connected to the vacuum tube through the three-way valve.

[0019] Optionally, the outer periphery of the two drive components is provided with a dust cover, which is fixed to the mounting base.

[0020] Through the above technical solution, the fixed base serves as the installation foundation for the entire adsorption fixture. Its connection with the robotic arm allows the entire adsorption fixture to be flexibly positioned and moved by the robot. The segmented structure of the first, second, and third adsorption blocks allows the drive assembly to rotate the first and third adsorption blocks around the rotation axis when adsorbing C-shaped blanks. This enables the three adsorption blocks to automatically adjust their angles according to the irregular curved surface shape of the blank, increasing the contact area between the fixture's adsorption surface and the blank, and improving the effective area of ​​the vacuum negative pressure. This effectively prevents the blank from detaching during the conveying process due to external vibration, inertial force, and other factors, thus improving the stability of blank clamping and conveying. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a material preform adsorption device provided by this utility model;

[0022] Figure 2 yes Figure 1 Side view;

[0023] Figure 3 This is a schematic diagram of the drive component in this utility model;

[0024] Figure 4 This is a schematic diagram of the negative pressure hole in this utility model.

[0025] Explanation of reference numerals in the attached figures

[0026] 1. Fixed base; 2. Adsorption assembly; 21. First adsorption block; 22. Second adsorption block; 23. Third adsorption block; 24. Negative pressure hole; 3. Rotating shaft; 4. Drive assembly; 41. Cylinder; 42. Telescopic mechanism; 43. First connecting rod; 44. Second connecting rod; 5. Adsorption block base; 6. Vacuum tube; 7. Dust cover. Detailed Implementation

[0027] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0028] It should be noted that, in the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0029] Furthermore, the terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "comprising" or "including" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well.

[0030] It should also be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0032] like Figure 1 As shown, this utility model provides a material preform adsorption fixture for adsorbing material preforms from an automotive fuel tank. The fixture may include a fixed base 1, an adsorption component 2, two rotating shafts 3, and two drive components 4.

[0033] Specifically, one end of the fixed base 1 is set at the end of the robot arm. The fixed base 1 serves as the installation base for the entire adsorption fixture. Its connection with the robot arm enables the entire material adsorption fixture to quickly and accurately reach the designated position for material adsorption and handling operations.

[0034] The adsorption component 2 is located at the other end of the fixed base 1. The adsorption component 2 includes a first adsorption block 21, a second adsorption block 22, and a third adsorption block 23 arranged sequentially along the length of the material blank. The first adsorption block 21, the second adsorption block 22, and the third adsorption block 23 are used to adsorb different parts of the material blank. This multi-point adsorption method can effectively increase the adsorption area of ​​the material blank, reduce the risk of the material blank falling off during the gripping and handling process, thereby reducing the use of raw materials and reducing the scrap rate of products, ensuring the continuity of the production process, and improving production efficiency.

[0035] Two rotating shafts 3 are respectively disposed at both ends of the second adsorption block 22. The ends of the first adsorption block 21 and the third adsorption block 23 near the second adsorption block 22 are respectively hinged to the corresponding rotating shafts 3. Two driving components 4 are respectively disposed on the side of the first adsorption block 21 and the third adsorption block 23 away from the material blank, and are used to cooperate with the rotating shafts 3 to drive the first adsorption block 21 and the third adsorption block 23 to rotate in the direction of the material blank.

[0036] In some embodiments, the first adsorption block 21 and the third adsorption block 23 may be fixed on a rotating base plate, which rotates around the rotating shaft 3.

[0037] In some embodiments, the drive assembly 4 may be a linear drive device such as an electric push rod or a cylinder 41, with one end fixed on the fixed base 1 and the other end connected to the first adsorption block 21 or the third adsorption block 23, for pushing the first adsorption block 21 or the third adsorption block 23 to rotate around the corresponding rotation axis 3 toward the material blank.

[0038] Understandably, the rotatable arrangement of the first adsorption block 21 and the third adsorption block 23 enables the adsorption assembly 2 to adaptively adjust according to different shapes and degrees of curvature of automotive fuel tank blanks, ensuring that each adsorption block can closely fit the surface of the blank, thus improving the versatility and adaptability of the tooling.

[0039] In practical use, before adsorbing the material blank, the first adsorption block 21 and the third adsorption block 23 are in a relatively flat position with the second adsorption block 22, and the entire adsorption assembly 2 is in an unfolded state, waiting for the robotic arm to move it to the material blank discharge position. As the adsorption assembly 2 gradually approaches the material blank, the second adsorption block 22 first contacts the surface of the material blank. At the same time, the drive assembly 4 starts working, pushing the first adsorption block 21 and the third adsorption block 23 to rotate around the rotation axis 3 towards the material blank until they are attached to the surface of the material blank, forming a multi-point stable adsorption state. At this time, the vacuum pump is started, so that the three adsorption blocks generate sufficient negative pressure through the negative pressure hole 24 to firmly adsorb the material blank. After the material blank is successfully adsorbed, the robot controls the robotic arm according to the production process to transport the material blank to the designated position, such as the processing station or storage area of ​​the next process. After reaching the designated position, the vacuum pump is turned off, releasing the negative pressure of the adsorption blocks, and the material blank falls off the adsorption assembly 2, completing a complete material blank adsorption, transportation and placement process. Afterwards, the robot drives the adsorption fixture back to the initial position, waiting for the next operation.

[0040] In this utility model, combined with Figure 2 and Figure 4 As shown, the first adsorption block 21, the second adsorption block 22 and the third adsorption block 23 are all provided with negative pressure chambers. Multiple negative pressure holes 24 are provided on the side wall of the negative pressure chamber near the material blank. The negative pressure chamber is connected to a vacuum pump. When the vacuum pump (not shown in the figure) is started, a negative pressure is generated in the negative pressure chamber. The material blank is tightly adsorbed and fixed through the negative pressure holes 24 to prevent the material blank from shifting or shaking.

[0041] Furthermore, in order to increase the adsorption force of the adsorption block, the negative pressure holes 24 are arranged in two rows. The two rows of negative pressure holes 24 are staggered along the length of the material blank, so that the negative pressure adsorption force is more evenly distributed on the surface of the material blank. Compared with the traditional single arrangement or regular arrangement, the staggered layout can better cover the surface of the material blank and avoid adsorption blind spots.

[0042] In some embodiments, based on existing material specifications, the diameter of the negative pressure holes 24 can be set to 16 mm, the depth to 10 mm, and the number to 14. The 16 mm diameter of the negative pressure holes 24 ensures sufficient adsorption while avoiding increased air leakage due to excessively large pore sizes, thus affecting the negative pressure effect. The 10 mm depth ensures that a relatively stable negative pressure space is formed when the negative pressure holes 24 contact the material, enhancing adsorption stability. The number of 14 negative pressure holes 24 meets the effective adsorption requirements of the material without increasing structural complexity due to an excessive number.

[0043] In this utility model, such as Figure 3 As shown, the drive assembly 4 includes a cylinder 41 and a telescopic mechanism 42 connected to the output end of the cylinder 41. The telescopic mechanism 42 is connected to the first adsorption block 21 or the third adsorption block 23. The cylinder 41 is fixed on the side of the fixed base 1 away from the adsorption assembly 2. It drives the piston rod to perform linear reciprocating motion by compressed air, which drives the telescopic mechanism 42 to provide basic driving force for the displacement of the first adsorption block 21 or the third adsorption block 23.

[0044] Furthermore, the drive assembly 4 also includes an angle adjustment linkage mechanism, which includes a first link 43 and a second link 44. One end of the first link 43 is hinged to one end of the second link 44, the other end of the first link 43 is connected to the first adsorption block 21 or the third adsorption block 23, and the other end of the second link 44 is hinged to the fixed base 1.

[0045] An angle adjustment linkage mechanism is located above the cylinder 41 to realize multi-degree-of-freedom angle adjustment of the first adsorption block 21 or the third adsorption block 23. It consists of a first link 43 (active arm) and a second link 44 (driven arm). By designing the link length and cooperating with the hinge point layout, a dual-degree-of-freedom adjustment structure is formed. The hinge point of the second link 44 and the fixed seat 1 constitutes a rotation fulcrum.

[0046] In summary, during the actual operation of the drive component 4, the piston rod displacement of the cylinder 41 drives the telescopic mechanism 42 to move linearly. At this time, the angle adjustment linkage mechanism generates a swing angle through the first linkage 43, and the second linkage 44 compensates for the angle change, ultimately realizing the multi-degree-of-freedom angle adjustment of the first adsorption block 21 or the third adsorption block 23.

[0047] In this utility model, in order to avoid restricting the rotational freedom of the first adsorption block 21 or the third adsorption block 23 in directions other than the design direction, the material adsorption fixture also includes an adsorption block base 5. One end of the adsorption block base 5 is fixed on the fixed seat 1, and the other end of the adsorption block base 5 is connected to the second adsorption block 22.

[0048] In some embodiments, the rotating shaft 3 may be fixed at both ends of the adsorption block base 5 near the material blank.

[0049] In some embodiments, to facilitate the replacement of the adsorption block or the adjustment of the layout of the adsorption assembly 2, the adsorption block base 5 and the fixing seat 1 may be detachably connected (e.g., fixed with bolts).

[0050] In this invention, the material preform adsorption fixture also includes a vacuum tube 6. One end of the vacuum tube 6 passes through the adsorption block base 5 and extends into the negative pressure chamber of the second adsorption block 22. The other end of the vacuum tube 6 is connected to a vacuum pumping device.

[0051] Furthermore, a three-way valve is provided on the vacuum tube 6, and the negative pressure chambers of the first adsorption block 21 and the third adsorption block 23 are respectively connected to the vacuum tube 6 through the three-way valve.

[0052] The main pipeline of vacuum tube 6 connects the vacuum pumping equipment to the negative pressure chamber of the second adsorption block 22. The end of the main pipeline near the vacuum pumping equipment can be fixed to the fixed base 1 by a fixed bracket. A three-way valve (not shown in the attached figure) can be installed at the end of the main pipeline near the adsorption block to realize the parallel control of the negative pressure chambers of the first adsorption block 21 and the third adsorption block 23. With this design, when the three-way valve is opened, the negative pressure chambers of the three adsorption blocks can be vacuumed simultaneously, avoiding the material blank displacement caused by step adsorption.

[0053] Understandably, the three-way valve, in conjunction with the solenoid valve, can isolate a single adsorption block for maintenance (such as replacing the sealing ring) without shutting down the entire vacuum system. If a single adsorption block leaks, the three-way valve can automatically cut off its negative pressure path, maintaining the normal operation of other adsorption blocks.

[0054] In this utility model, in order to prevent external dust, metal shavings and other impurities from entering the drive assembly 4 and causing problems such as wear on the piston rod of cylinder 41, dust covers 7 are provided on the outer periphery of the two drive assemblies 4, and the dust covers 7 are fixed on the fixed base 1.

[0055] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including the combination of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A preform adsorption fixture, characterized in that, include: A fixed base (1) is provided at one end of the robot's robotic arm; An adsorption component (2) is disposed at the other end of the fixed base (1). The adsorption component (2) includes a first adsorption block (21), a second adsorption block (22) and a third adsorption block (23) arranged sequentially along the length of the material blank. Two rotating shafts (3) are respectively disposed at both ends of the second adsorption block (22), and the first adsorption block (21) and the third adsorption block (23) are respectively hinged to the corresponding rotating shafts (3) at the ends of the first adsorption block (22) and the third adsorption block (23). Two drive components (4) are respectively disposed on the side of the first adsorption block (21) and the third adsorption block (23) away from the material blank, and are used to cooperate with the rotating shaft (3) to drive the first adsorption block (21) and the third adsorption block (23) to rotate toward the material blank.

2. The material preform adsorption fixture according to claim 1, characterized in that, The first adsorption block (21), the second adsorption block (22) and the third adsorption block (23) are all provided with negative pressure cavities. Multiple negative pressure holes (24) are provided on the cavity wall of the negative pressure cavity near the material blank. The negative pressure cavity is connected to a vacuum pumping device.

3. The material preform adsorption fixture according to claim 2, characterized in that, The negative pressure holes (24) are arranged in two rows, and the two rows of negative pressure holes (24) are staggered along the length direction of the blank.

4. The material preform adsorption fixture according to claim 3, characterized in that, The diameter of the negative pressure hole (24) is set to 16mm, the depth is set to 10mm, and the number is set to 14.

5. The material preform adsorption fixture according to claim 1, characterized in that, The drive assembly (4) includes a cylinder (41) and a telescopic mechanism (42) connected to the output end of the cylinder (41), the telescopic mechanism (42) being connected to the first adsorption block (21) or the third adsorption block (23).

6. The material preform adsorption fixture according to claim 5, characterized in that, The drive assembly (4) further includes an angle adjustment linkage mechanism, which includes a first link (43) and a second link (44). One end of the first link (43) is hinged to one end of the second link (44), and the other end of the first link (43) is connected to the first adsorption block (21) or the third adsorption block (23). The other end of the second link (44) is hinged to the fixed seat (1).

7. The material preform adsorption fixture according to claim 2, characterized in that, The material preform adsorption fixture also includes an adsorption block base (5), one end of which is fixed on the fixed seat (1), and the other end of which is connected to the second adsorption block (22).

8. The material preform adsorption fixture according to claim 7, characterized in that, The material preform adsorption fixture also includes a vacuum tube (6), one end of which passes through the adsorption block base (5) and extends into the negative pressure chamber of the second adsorption block (22), and the other end of which is connected to the vacuum pumping device.

9. The material preform adsorption fixture according to claim 8, characterized in that, A three-way valve is provided on the vacuum tube (6), and the negative pressure chambers of the first adsorption block (21) and the third adsorption block (23) are respectively connected to the vacuum tube (6) through the three-way valve.

10. The material preform adsorption fixture according to claim 1, characterized in that, The outer periphery of the two drive components (4) is provided with a dust cover (7), which is fixed on the fixed base (1).

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