An electrophoretic paint film penetration force detection tool

Abstract

The utility model relates to the technical field of automobile coating manufacturing more particularly, relate to a kind of electrophoretic paint film swimming penetration force detection frock, including adjustable positioning base, telescopic support mechanism, positioning locking mechanism;The bottom of telescopic support mechanism is fixedly connected in the adjustable positioning base, the positioning locking mechanism is located at the top of telescopic support mechanism, the positioning locking mechanism is used to connect the telescopic support mechanism with swimming penetration force box, the telescopic support mechanism is used to adjust the height of the swimming penetration force box, the adjustable positioning base is used to install the swimming penetration force box in vehicle body preset position.By adjustable positioning base and vehicle body connection, provide the adjusting function in horizontal plane, by telescopic support mechanism support swimming penetration force box and adjust the height of swimming penetration force box, realize the adjustment of swimming penetration force box three-dimensional position, can be applicable to different vehicle models, improve versatility.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive coating manufacturing, and more specifically, to a tooling for testing the penetration power of electrophoretic paint films. Background Technology

[0002] In automotive painting processes, electrophoresis is a crucial step in the corrosion and rust prevention of the body-in-white. This process uses electrochemical action to deposit a uniform paint film on the surface of a conductive substrate. Its core indicator, electrophoresis penetration, directly reflects the paint's ability to form a film in concealed areas such as the body's internal cavities and welds, and directly determines the overall rust prevention level and lifespan of the vehicle body.

[0003] The standard testing method widely used in the industry mainly uses a standard electrophoresis cell. During testing, the electrophoresis cell is used as the cathode to form a circuit with the anode in the electrophoresis tank. Under the action of an electric field, ions of the electrophoretic paint solution pass through the pores on the cell and deposit into a film on its inner surface.

[0004] Traditional testing methods use a galvanized sheet metal-made penetration test box with wire. The box is fixed to a specific position on the car body and passes through the electrophoresis tank along with the body-in-white. After electrophoresis, the penetration test box is removed, and the paint film thickness on the galvanized sheet is measured to assess the penetration level.

[0005] However, during testing, installation personnel need to enter the vehicle compartment for adjustments, which is inefficient; different vehicle models have different internal structures, spatial dimensions, and fixing anchor points, requiring repeated adjustments to the fixing position of the permeation box and the wire binding method for different models, resulting in long calibration times; multiple models require multiple fixing schemes, making work management difficult, prone to confusion and misuse, leading to measurement failures; and relying on manual experience and feel for adjustments makes it difficult to guarantee measurement consistency; the electrophoresis tank has a fast liquid flow rate and violent fluid impact, making it difficult for the wire fixing to provide rigid support, which can easily cause the permeation box to drift, resulting in inaccurate measurement data; the high deformation rate of the wire requires frequent replacement, resulting in poor repeatability and excessive consumption of galvanized iron wire per test, leading to high costs.

[0006] Existing technology discloses an instrument and method for on-site testing of electrophoretic paint penetration. The instrument includes a PVC penetration tube, one end of which is closed, and the other end is fitted with a rubber stopper to ensure the tube remains sealed after the stopper is in place. A metal test plate is placed inside the penetration tube, and the test plate is connected to a connecting wire leading to the outside of the penetration tube. A magnetic adsorption plate is mounted on the penetration tube via an adjustable C-clamp. In this solution, using the adsorption plate to fix the penetration tube to the vehicle body allows for quick installation and removal of the instrument, improving operational convenience. It also reduces consumable costs by avoiding the consumption of wire, and the magnetic adsorption provides a relatively stable fixing force, reducing the risk of instrument drift. However, the adjustable C-clamp can usually only adjust the angle or extension length of the adsorption plate relative to the penetration tube, but the position of the adsorption plate itself is fixed. This cannot cope with the risk of detachment due to changes in the curvature of the vehicle body, and the fixing position cannot be adjusted according to different vehicle models. Utility Model Content

[0007] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a tooling for testing the penetration force of electrophoretic paint films. The installation position can be adjusted according to different vehicle models, so as to realize the adjustable installation of the penetration force box at a preset position on the vehicle body and improve versatility.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A fixture for testing the penetration force of electrophoretic paint films is provided, comprising an adjustable positioning base, a telescopic support mechanism, and a positioning locking mechanism; the bottom of the telescopic support mechanism is fixedly connected to the adjustable positioning base, the positioning locking mechanism is disposed on the top of the telescopic support mechanism, the positioning locking mechanism is used to connect the telescopic support mechanism to a penetration force box, the telescopic support mechanism is used to adjust the height of the penetration force box, and the adjustable positioning base is used to install the penetration force box at a preset position on the vehicle body.

[0009] This utility model discloses a fixture for testing the penetration force of electrophoretic paint films. It connects to the vehicle body via an adjustable positioning base, providing horizontal adjustment capabilities. A telescopic support mechanism supports the penetration force box and adjusts its height, enabling three-dimensional position adjustment. A positioning and locking mechanism ensures quick and reliable installation and fixation of the penetration force box, preventing it from shaking or falling off during electrophoresis, thus guaranteeing the stability of the testing process and improving the accuracy of measurement data. The three-dimensional position adjustment of the penetration force box makes it suitable for different vehicle models, enhancing its versatility.

[0010] Furthermore, the adjustable positioning base includes a transverse base, a longitudinal base, and a connecting mechanism. The transverse base has a transverse groove, and a first connector passing through the transverse groove connects the transverse base to the vehicle body. The longitudinal base has a longitudinal groove. The connecting mechanism is installed in the longitudinal groove and is used to detachably connect the transverse base and the longitudinal base.

[0011] Furthermore, the connecting mechanism includes a connecting hole provided in the transverse base and a second connecting member passing through the longitudinal groove, and the second connecting member is installed in the connecting hole, and the second connecting member is used to connect the transverse base and the longitudinal base.

[0012] Furthermore, the connecting mechanism includes a nut, a stud, and a connecting hole provided in the transverse base. One end of the stud is fixedly installed in the connecting hole, and the other end of the stud passes through the longitudinal groove and is threaded to the nut, and the nut abuts against the longitudinal base.

[0013] Furthermore, the connecting mechanism also includes a washer located between the nut and the longitudinal base.

[0014] Furthermore, the transverse base is provided in two sets, and the two sets of transverse bases are respectively installed on the vehicle body through the first connector, and the two sets of transverse bases are respectively detachably connected to the longitudinal base through the connecting mechanism.

[0015] Furthermore, both the transverse base and the longitudinal base are cold-rolled steel structures.

[0016] Furthermore, the telescopic support mechanism includes a sleeve and a telescopic rod. The sleeve is fitted around the outer periphery of the telescopic rod, and the bottom of the sleeve is fixedly connected to the longitudinal base. The positioning and locking mechanism is located at the top of the telescopic rod. The sleeve has several first through holes, and the telescopic rod has several second through holes. A third connecting member passes through the first through holes and the second through holes. The telescopic rod and the sleeve are connected by the third connecting member.

[0017] Furthermore, the positioning and locking mechanism includes a locking groove and a locking member. The top of the telescopic rod is connected to the locking groove. The locking groove is used to place the permeability box. The locking groove has a first locking hole. The locking member passes through the first locking hole and the second locking hole located in the permeability box. The locking groove and the permeability box are connected through the locking member.

[0018] Furthermore, both the telescopic support mechanism and the positioning and locking mechanism are provided in two sets, with the top ends of the two telescopic rods respectively connected to the two locking grooves.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: The installation position can be adjusted according to different vehicle models, enabling adjustable installation of the permeation box at a preset position on the vehicle body, thus improving versatility; the permeation box can be securely installed to ensure the stability of the testing process and the accuracy of measurement data; for the adjusted position and height, the adjustment parameters can be recorded in subsequent tests to achieve rapid and consistent repositioning, improving the comparability and reliability of test data. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the electrophoretic coating film penetration testing fixture from a first-view perspective in an embodiment of this utility model. Figure 2 This is a schematic diagram of the electrophoretic coating film penetration testing fixture from a second perspective in an embodiment of this utility model. Figure 3 This is a schematic diagram of the electrophoretic coating film penetration testing fixture in the embodiment of this utility model from a third-person perspective.

[0021] In the attached diagram: 1-Adjustable positioning base; 11-Transverse base; 111-Transverse groove; 12-Longitudinal base; 121-Longitudinal groove; 13-Connecting mechanism; 131-Second connecting piece; 132-Nut; 133-Washer; 2-Telescopic support mechanism; 21-Sleeve; 22-Telescopic rod; 23-Third connecting piece; 3-Positioning locking mechanism; 31-Locking groove; 32-Locking piece. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0023] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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 terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0024] Example 1 A fixture for testing the penetration power of electrophoretic coatings, such as Figures 1 to 3 As shown, it includes an adjustable positioning base 1, a telescopic support mechanism 2, and a positioning locking mechanism 3; the bottom of the telescopic support mechanism 2 is fixedly connected to the adjustable positioning base 1, the positioning locking mechanism 3 is located on the top of the telescopic support mechanism 2, the positioning locking mechanism 3 is used to connect the telescopic support mechanism 2 to the permeable force box, the telescopic support mechanism 2 is used to adjust the height of the permeable force box, and the adjustable positioning base 1 is used to install the permeable force box at a preset position on the vehicle body.

[0025] The aforementioned electrophoretic paint penetration testing fixture connects to the vehicle body via an adjustable positioning base 1, providing horizontal adjustment. A telescopic support mechanism 2 supports the penetration box and adjusts its height, enabling three-dimensional position adjustment. A positioning locking mechanism 3 ensures quick and reliable installation and fixation of the penetration box, preventing it from shaking or falling off during electrophoresis, thus guaranteeing the stability of the testing process and improving the accuracy of measurement data. The adjustable three-dimensional position of the penetration box makes it suitable for different vehicle models, enhancing its versatility.

[0026] like Figures 1 to 3 As shown, the adjustable positioning base 1 includes a transverse base 11, a longitudinal base 12, and a connecting mechanism 13. The transverse base 11 has a transverse groove 111, and a first connector passing through the transverse groove 111 connects the transverse base 11 to the vehicle body. The longitudinal base 12 has a longitudinal groove 121. The connecting mechanism 13 is installed in the longitudinal groove 121 and is used to detachably connect the transverse base 11 and the longitudinal base 12. Specifically, both the transverse base 11 and the longitudinal base 12 are long strip-shaped cold-rolled steel structures with sufficient strength and rigidity. The transverse groove 111 and the longitudinal groove 121 are arranged perpendicularly. The first connector passes through the transverse groove 111 and is screwed into a pre-set threaded process hole in the vehicle body, thereby initially fixing the transverse base 11 to the vehicle body. Since it is a slot-hole connection, the transverse base 11 can be adjusted in position along the length direction of the transverse groove 111, i.e., the transverse direction of the vehicle body, to achieve lateral position adjustment of the permeation box.

[0027] like Figure 2As shown, the connecting mechanism 13 includes a connecting hole in the transverse base 11 and a second connecting member 131 passing through the longitudinal groove 121. The second connecting member 131 is installed in the connecting hole and is used to connect the transverse base 11 and the longitudinal base 12. In implementation, the connecting hole is pre-machined in the transverse base 11. One end of the second connecting member 131 passes through the longitudinal groove 121 and is connected in the connecting hole. The longitudinal base 12 can slide along the length direction of the longitudinal groove 121, i.e., the longitudinal direction of the vehicle body, to adjust the longitudinal position of the permeable box. The other end of the second connecting member 131 abuts against the longitudinal base 12, pressing the longitudinal base 12 tightly against the transverse base 11 below, thus achieving locking. The arrangement of the transverse groove 111 and the longitudinal groove 121 ensures that the tooling can be accurately aligned with the mounting points at various locations on the vehicle body.

[0028] like Figure 1 , Figure 2 As shown, there are two sets of transverse bases 11. Each set of transverse bases 11 is mounted to the vehicle body via a first connector, and both sets are detachably connected to the longitudinal base 12 via a connecting mechanism 13. The two transverse bases 11 are arranged in parallel, providing stable two-point support. It should be noted that multiple sets of transverse bases 11 can be provided as needed to further improve installation stability.

[0029] In this embodiment, the tooling is installed through the existing process holes in the vehicle body, avoiding drilling or pasting on the vehicle body and causing no damage to the vehicle body. Moreover, once the position of the tooling is adjusted for a certain inspection point, subsequent inspections can achieve rapid and consistent repetitive positioning by recording the adjustment parameters, such as the position of the connecting mechanism 13 in the longitudinal groove 121, which greatly improves the comparability and reliability of the inspection data.

[0030] Example 2 This embodiment is similar to Embodiment 1, except that, as Figure 2 As shown, the connecting mechanism 13 includes a nut 132, a second connecting member 131, and a connecting hole located on the transverse base 11. The second connecting member 131 is a stud, one end of which is fixedly installed in the connecting hole, and the other end of which passes through the longitudinal groove 121 and is threaded to the nut 132. The nut 132 abuts against the longitudinal base 12. Specifically, the connecting mechanism 13 also includes a washer 133, which is located between the nut 132 and the longitudinal base 12. In implementation, the transverse base 11 is pre-machined with a connecting hole. One end of the stud can be fixedly installed in the connecting hole by welding or interference fit, and the other end of the stud passes through the longitudinal groove 121. Then, the washer 133 is fitted on, and finally, the nut 132 is tightened. When the nut 132 is loosened, the longitudinal base 12 can move along the length of the longitudinal groove 121; when the nut 132 is tightened, the washer 133 and the nut 132 press the longitudinal base 12 tightly against the transverse base 11 below, achieving locking.

[0031] Example 3 This embodiment is similar to Embodiment 1 or Embodiment 2, except that, as Figure 2 , Figure 3 As shown, the telescopic support mechanism 2 includes a sleeve 21 and a telescopic rod 22. The sleeve 21 is fitted around the outer periphery of the telescopic rod 22, and the bottom of the sleeve 21 is fixedly connected to the longitudinal base 12. A positioning and locking mechanism 3 is located at the top of the telescopic rod 22. The sleeve 21 has several first through holes, and the telescopic rod 22 has several second through holes. A third connecting piece 23 passes through the first and second through holes, and the telescopic rod 22 and the sleeve 21 are connected by the third connecting piece 23. When the telescopic rod 22 extends or retracts to the required height within the sleeve 21, a certain pair of first and second through holes will align. At this time, inserting the third connecting piece 23 into the aligned first and second through holes locks the relative position of the telescopic rod 22 and the sleeve, thereby achieving multi-level adjustment of the support height. This adjustment method has a simple structure and reliable locking.

[0032] like Figures 1 to 3 As shown, the positioning and locking mechanism 3 includes a locking groove 31 and a locking member 32. The top of the telescopic rod 22 is connected to the locking groove 31. The locking groove 31 is used to place the electrophoresis box. The locking groove 31 has a first locking hole. The locking member 32 passes through the first locking hole and the second locking hole located in the electrophoresis box. The locking groove 31 and the electrophoresis box are connected by the locking member 32. The locking groove 31 is a U-shaped or C-shaped slot structure. The size of the locking groove 31 matches the frame of the standard electrophoresis box, which is used to stably support and position the electrophoresis box. When the electrophoresis box is placed in the locking groove 31, the first locking hole and the second locking hole are aligned. At this time, the locking member 32 is passed through and tightened to firmly clamp the electrophoresis box in the locking groove 31, preventing the electrophoresis box from shaking or falling off during electrophoresis.

[0033] like Figure 2 As shown, both the telescopic support mechanism 2 and the positioning locking mechanism 3 are provided in two sets, with the top ends of the two telescopic rods 22 respectively connected to the two locking grooves 31. The two sets of telescopic support mechanisms 2 are used to adjust and support the height of the permeable force box, ensuring the balance of the permeable force box.

[0034] In this embodiment, the process of using the electrophoretic paint film penetration testing fixture includes: determining the preset position on the vehicle body where the penetration test needs to be performed; adjusting the left and right positions of the two transverse bases 11 according to the installation point position and initially fixing them to the corresponding threaded holes on the vehicle body through the first connector, so that the connecting holes on the transverse bases 11 are located on the same longitudinal line; then placing the longitudinal base 12 and adjusting the front and rear positions of the longitudinal base 12; using the connecting mechanism 13 to press the longitudinal base 12 against the transverse base 11 to complete the transverse and longitudinal positioning; pulling the telescopic rod 22 and adjusting the height of the telescopic rod 22 extending out of the sleeve 21, so that the top... Once the locking groove 31 reaches the predetermined height, insert the third connector 23 to lock the height. Place the standard penetration box into the locking groove 31, align it with the first and second locking holes, insert and tighten the locking piece 32 to ensure the penetration box is securely installed. Send the car body with the fixture and penetration box installed into the electrophoresis tank for the normal electrophoresis coating process. After electrophoresis, remove the car body, disassemble the fixture in the reverse order of the above operations, remove the penetration box, clean it, measure the paint film thickness at different depths inside the box, and calculate the penetration value. Record the fixture adjustment parameters corresponding to this test point for easy repeatability testing at the same location next time.

[0035] It should be noted that in this embodiment, the two sets of telescopic support mechanisms 2 can be adjusted to different heights. The two sets of telescopic support mechanisms 2 are connected to two different permeability boxes through positioning and locking mechanisms 3, so that permeability data of two heights can be obtained at one time according to actual testing needs, thereby improving testing efficiency.

[0036] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0037] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A fixture for testing the penetration power of electrophoretic coating films, characterized in that, It includes an adjustable positioning base (1), a telescopic support mechanism (2), and a positioning locking mechanism (3); the bottom of the telescopic support mechanism (2) is fixedly connected to the adjustable positioning base (1), the positioning locking mechanism (3) is located on the top of the telescopic support mechanism (2), the positioning locking mechanism (3) is used to connect the telescopic support mechanism (2) to the permeable box, the telescopic support mechanism (2) is used to adjust the height of the permeable box, and the adjustable positioning base (1) is used to install the permeable box at a preset position on the vehicle body.

2. The electrophoretic coating film penetration testing fixture according to claim 1, characterized in that, The adjustable positioning base (1) includes a transverse base (11), a longitudinal base (12), and a connecting mechanism (13). The transverse base (11) has a transverse groove (111), and a first connector passing through the transverse groove (111) connects the transverse base (11) to the vehicle body. The longitudinal base (12) has a longitudinal groove (121). The connecting mechanism (13) is installed in the longitudinal groove (121) and is used to detachably connect the transverse base (11) and the longitudinal base (12).

3. The electrophoretic coating film penetration testing fixture according to claim 2, characterized in that, The connecting mechanism (13) includes a connecting hole provided in the transverse base (11) and a second connecting member (131) passing through the longitudinal groove (121), and the second connecting member (131) is installed in the connecting hole and is used to connect the transverse base (11) and the longitudinal base (12).

4. The electrophoretic coating film penetration testing fixture according to claim 2, characterized in that, The connecting mechanism (13) includes a nut (132), a stud, and a connecting hole provided in the transverse base (11). One end of the stud is fixedly installed in the connecting hole, and the other end of the stud passes through the longitudinal groove (121) and is threaded to the nut (132). The nut (132) abuts against the longitudinal base (12).

5. The electrophoretic coating film penetration testing fixture according to claim 4, characterized in that, The connecting mechanism (13) also includes a gasket (133) located between the nut (132) and the longitudinal base (12).

6. The electrophoretic coating film penetration testing fixture according to claim 2, characterized in that, The transverse base (11) is provided in two sets. The two sets of transverse bases (11) are respectively installed on the vehicle body through the first connector, and the two sets of transverse bases (11) are respectively detachably connected to the longitudinal base (12) through the connecting mechanism (13).

7. The electrophoretic coating film penetration testing fixture according to claim 2, characterized in that, Both the transverse base (11) and the longitudinal base (12) are cold-rolled steel structures.

8. The electrophoretic coating film penetration testing fixture according to any one of claims 2 to 7, characterized in that, The telescopic support mechanism (2) includes a sleeve (21) and a telescopic rod (22). The sleeve (21) is fitted around the outer periphery of the telescopic rod (22). The bottom of the sleeve (21) is fixedly connected to the longitudinal base (12). The positioning and locking mechanism (3) is located at the top of the telescopic rod (22). The sleeve (21) has several first through holes. The telescopic rod (22) has several second through holes. A third connector (23) passes through the first through holes and the second through holes. The telescopic rod (22) and the sleeve (21) are connected by the third connector (23).

9. The electrophoretic coating film penetration testing fixture according to claim 8, characterized in that, The positioning and locking mechanism (3) includes a locking groove (31) and a locking member (32). The top of the telescopic rod (22) is connected to the locking groove (31). The locking groove (31) is used to place the permeability box. The locking groove (31) has a first locking hole. The locking member (32) passes through the first locking hole and the second locking hole located in the permeability box. The locking groove (31) and the permeability box are connected through the locking member (32).

10. The electrophoretic coating film penetration testing fixture according to claim 9, characterized in that, Both the telescopic support mechanism (2) and the positioning locking mechanism (3) are provided in two sets, with the top ends of the two telescopic rods (22) respectively connected to the two locking grooves (31).

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