Adsorption positioning jig for bipolar plate processing

Abstract

The application discloses an adsorption positioning jig for bipolar plate processing, which comprises a positioning seat and two pressing plates, wherein the positioning seat is rectangular, the top of the positioning seat is provided with a positioning groove suitable for accommodating a bipolar plate, the groove bottom of the positioning groove is provided with an avoiding groove extending along the width direction at the middle position in the length direction, the avoiding groove is symmetrically distributed with adsorption channels on both sides, the sidewall of the positioning seat is provided with a pipeline mounting hole for connecting an external negative pressure equipment to provide negative pressure for the adsorption channels, and the two pressing plates are matched with the positioning groove and used for pressing the bipolar plate at both ends of the positioning seat in the length direction after the bipolar plate is placed in position. The adsorption positioning jig for bipolar plate processing can quickly and accurately position and flatly fix the bipolar plate, and has the advantages of simple structure and convenient use.

Description

Technical Field

[0001] This utility model relates to the field of positioning tooling technology, and in particular to an adsorption positioning fixture for bipolar plate processing. Background Technology

[0002] Bipolar plates, also known as current collectors, are a crucial component of fuel cells. They separate fuel from oxidant, provide gas flow channels, prevent hydrogen and oxygen from mixing in the cell chambers, and establish a current path between the series-connected anode and cathode. To minimize resistance to current and heat conduction while maintaining sufficient mechanical strength and good gas barrier properties, bipolar plates should be as thin as possible.

[0003] During the processing of bipolar plates, processes such as cutting and welding can easily cause warping and deformation, making it difficult to accurately position and flatten the bipolar plates in subsequent work stations. Utility Model Content

[0004] This application provides an adsorption positioning fixture for bipolar plate processing, which can quickly and accurately position and flatten bipolar plates. It has a simple structure and is easy to use.

[0005] This application provides an adsorption positioning fixture for bipolar plate processing, including a positioning seat and two pressure plates. The positioning seat is rectangular, and the top of the positioning seat is provided with a positioning groove suitable for accommodating the bipolar plate. The bottom of the positioning groove has a clearance groove extending along the width direction at the middle position in the length direction. Adsorption channels are symmetrically distributed on both sides of the clearance groove. The side wall of the positioning seat has a pipe installation hole for connecting an external negative pressure device to provide negative pressure to the adsorption channels. The two pressure plates cooperate with the positioning groove to press the bipolar plate at both ends of the positioning seat in the length direction after the bipolar plate is placed in place.

[0006] In one possible implementation, the adsorption channel is a square channel that extends along the length or width of the positioning seat.

[0007] In one possible implementation, the positioning seat is provided with semi-circular notches symmetrically at both ends in the length direction, and the semi-circular notches extend into the positioning groove.

[0008] In one possible implementation, the positioning seat is symmetrically connected to guide posts at both ends along its length. The guide posts extend vertically, and a downward pressing post that can move up and down is vertically connected to the upper part of the guide posts. The downward pressing plate extends horizontally and is directly above the positioning groove. The top of the downward pressing plate is fixedly connected to the downward pressing post through a first adapter block.

[0009] In one possible implementation, the upper part of the guide post is fitted with a second adapter block in a sliding fit, and the pressing post is horizontally embedded in the second adapter block in a sliding fit. The two opposite ends of the second adapter block are respectively provided with a first linear opening and a second linear opening with mutually perpendicular extension directions. The first linear opening is connected to the guide post, and the second linear opening is connected to the pressing post. Adjusting bolts for adjusting the first linear opening and the second linear opening are respectively installed on the second adapter block.

[0010] In one possible implementation, the pressure plate is a polyetheretherketone (PEEK) plate.

[0011] Beneficial effects: Compared with the prior art, the adsorption positioning fixture for bipolar plate processing provided in this application can accurately position the bipolar plate through the positioning groove, firmly adsorb and fix the positioned bipolar plate through the adsorption channels on both sides of the positioning groove, and further press and fix the bipolar plate through the lower pressure plate to prevent the bipolar plate from warping and deforming at both ends. Thus, it can quickly and accurately position and flatten the bipolar plate. The overall structure is simple and easy to use.

[0012] These and other objects, features and advantages of this utility model will be fully realized through the following detailed description. Attached Figure Description

[0013] Figure 1 A schematic diagram of the structure of the adsorption positioning fixture for bipolar plate processing of this application is shown.

[0014] Figure 2 A partial structural schematic diagram of the adsorption positioning fixture for bipolar plate processing of this application is shown. Detailed Implementation

[0015] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0016] Those skilled in the art should understand that, in the disclosure of this specification, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0017] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0018] refer to Figure 1 and Figure 2 This application provides an adsorption positioning fixture for bipolar plate processing, including a positioning seat 10 and two lower pressure plates 20, wherein the positioning seat 10 is rectangular. The top of the positioning seat 10 is provided with a positioning groove 101 suitable for accommodating a bipolar plate 30, for precise positioning of the bipolar plate 30. At the midpoint of the length direction, the bottom of the positioning groove 101 has a clearance groove 102 extending along the width direction to provide clearance for the processing of the bipolar plate 30. Adsorption channels 103 are symmetrically distributed on both sides of the clearance groove 102. Simultaneously, the side wall of the positioning seat 10 has pipe mounting holes 104 for connecting an external negative pressure device to provide negative pressure to the adsorption channels 103, thereby firmly adsorbing the bipolar plate 30 at the bottom through the adsorption channels 103. That is, the top opening of the adsorption channel 103 is located at the bottom of the positioning groove 101. The pipe mounting hole 104 connects to an external negative pressure pipe, which then connects to a negative pressure supply device. The inner end of the negative pressure pipe connects to the inner cavity of the positioning seat 10, and then extends through the inner cavity to each adsorption channel 103. Furthermore, to address the issue of the bipolar plate 30 easily warping and deforming at both ends, in addition to being fixed by negative pressure adsorption, the two lower pressure plates 20 also cooperate with the positioning groove 101 to press the bipolar plate 30 firmly at both ends of the positioning seat 10 along its length after the bipolar plate 30 is placed in position.

[0019] Therefore, the adsorption positioning fixture for bipolar plate processing provided in this application achieves precise positioning through the positioning groove 101, provides adsorption fixation for the positioned bipolar plate 30 from below through the adsorption channel 103 below, and provides pressing fixation for the bipolar plate 30 from above through the lower pressure plate 20. It can achieve both precise positioning of the bipolar plate 30 and flat fixation of the bipolar plate 30. The lower pressure plate 20 mainly provides downward pressure at both ends, which is specifically designed to accurately fix the bipolar plate 30 that is prone to warping and deformation.

[0020] In one embodiment, the adsorption channel 103 is a square channel, and the adsorption channel 103 extends along the length or width direction of the positioning seat 10, resulting in a larger local adsorption area and better adsorption firmness.

[0021] In one embodiment, the positioning seat 10 is provided with semi-circular notches 105 symmetrically at both ends in the length direction, and the semi-circular notches 105 extend into the positioning groove 101 to facilitate the precise placement of the bipolar plate 30 into the positioning groove 101 or the removal of the bipolar plate 30 from the positioning groove 101. At the same time, the semi-circular notches 105 can conform to the shape of the operator's fingers, and occupy relatively less space.

[0022] Based on the weight of the lower pressure plate 20 itself, after the bipolar plate 30 is placed in place, the lower pressure plate 20 can be manually placed directly into position.

[0023] In one embodiment, the positioning base 10 is symmetrically connected to guide posts 11 at both ends along its length. The guide posts 11 extend vertically, and a downward pressing post 12 that can move up and down is vertically connected to the upper part of the guide posts 11. The downward pressing plate 20 extends horizontally and is directly above the positioning groove 101. The top of the downward pressing plate 20 is fixedly connected to the downward pressing post 12 through a first adapter block 21. This allows the downward pressing plate 20 to move down under the guidance of the guide posts 11, ensuring the accuracy of the downward pressing position of the downward pressing plate 20.

[0024] More preferably, the upper part of the guide post 11 is fitted with a second adapter block 13 in a sliding fit. The pressing post 12 is horizontally embedded in the second adapter block 13 in a sliding fit. The two opposite ends of the second adapter block 13 are respectively provided with a first linear opening 106 and a second linear opening 107 with mutually perpendicular extension directions. The first linear opening 106 communicates with the guide post 11, and the second linear opening 107 communicates with the pressing post 12. At the same time, the second adapter block 13 is respectively equipped with adjusting bolts 14 for adjusting the first linear opening 106 and the second linear opening 107, thereby facilitating the disassembly, assembly, and maintenance of the second adapter block 13 and the pressing post 12.

[0025] During use, first tighten the two adjusting bolts 14 to fix the lower pressure plate 20 above the positioning groove 101. After the bipolar plate 30 is in place, gradually loosen the adjusting bolts 14 on the first linear opening 106, and manually move the second adapter block 13 to move the lower pressure column 12 and the lower pressure plate 20 downwards until the lower pressure plate 20 presses against the top of the bipolar plate 30. Then, rotate the adjusting bolts 14 in the opposite direction to fix it, thereby pressing the bipolar plate 30. When it is necessary to remove the bipolar plate 30, similarly, first loosen the adjusting bolts 14 on the first linear opening 106, then move the second adapter block 13 upwards. After moving it into place, rotate the adjusting bolts 14 in the opposite direction to fix it.

[0026] In one embodiment, the lower pressure plate 20 is a polyetheretherketone (PEEK) plate, which not only has a high self-weight but also exhibits extremely stable chemical properties (does not release harmful ions), high cleanliness, and is not easily contaminated by the bipolar plate 30. Alternatively, barium sulfate (BaSO4) can be filled inside the PEEK plate to further increase the weight per unit volume of the lower pressure plate 20, resulting in better compression.

[0027] It should be noted that the terms "first" and "second" used in this application are for descriptive purposes only and do not indicate any order. They should not be construed as indicating or implying relative importance, and can be interpreted as names.

[0028] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. An adsorption positioning fixture for bipolar plate processing, characterized in that, The device includes a positioning base and two pressure plates. The positioning base is rectangular, and its top is provided with a positioning groove suitable for accommodating a bipolar plate. The bottom of the positioning groove has a clearance groove extending along the width direction at the middle position in the length direction. Adsorption channels are symmetrically distributed on both sides of the clearance groove. The side wall of the positioning base has pipe mounting holes for connecting an external negative pressure device to provide negative pressure to the adsorption channels. The two pressure plates cooperate with the positioning groove to press the bipolar plate at both ends of the positioning base in the length direction after the bipolar plate is placed in place.

2. The adsorption positioning fixture for bipolar plate processing as described in claim 1, characterized in that, The adsorption channel is a square channel that extends along the length or width of the positioning seat.

3. The adsorption positioning fixture for bipolar plate processing as described in claim 1, characterized in that, The positioning seat has semi-circular notches symmetrically provided at both ends in the length direction, and the semi-circular notches extend into the positioning groove.

4. The adsorption positioning fixture for bipolar plate processing as described in claim 1, characterized in that, The positioning seat is symmetrically connected to guide posts at both ends along its length. The guide posts extend vertically, and a downward pressing post that can move up and down is vertically connected to the upper part of the guide posts. The downward pressing plate extends horizontally and is directly above the positioning groove. The top of the downward pressing plate is fixedly connected to the downward pressing post through a first adapter block.

5. The adsorption positioning fixture for bipolar plate processing as described in claim 4, characterized in that, The upper part of the guide post is fitted with a second adapter block in a sliding fit. The lower pressure post is horizontally embedded in the second adapter block in a sliding fit. The two opposite ends of the second adapter block are respectively provided with a first linear opening and a second linear opening with mutually perpendicular extension directions. The first linear opening is connected to the guide post, and the second linear opening is connected to the lower pressure post. Adjusting bolts for adjusting the first linear opening and the second linear opening are respectively installed on the second adapter block.

6. The adsorption positioning fixture for bipolar plate processing as described in claim 1 or 4, characterized in that, The lower pressure plate is a polyetheretherketone (PEEK) plate.

Images