Leakage-proof detection tool for riveting inserts

Abstract

The utility model discloses a riveting insert leak-proof detection tool, and belongs to the technical field of riveting processing. Comprising a tool base and a plurality of detection units, a riveting reference part is arranged at the top of the tool base, each detection unit comprises a first insulation sleeve and an insulation leakage-proof pin embedded in the first insulation sleeve in a floating mode, the insulation leakage-proof pins can be inserted into riveting holes in a workpiece to be machined in the riveting direction, and the workpiece to be machined is arranged on the riveting reference part. Rivets arranged in the riveting holes in a penetrating mode can press the insulation leakage-proof pins downwards to be electrically connected with buffer springs in the tool base, the ends, pressing the tops of the insulation leakage-proof pins downwards, of the rivets can abut against the riveting reference part, and the insulation leakage-proof pins and the buffer springs are electrically connected with riveting equipment. The riveting insert leak-proof detection tool can effectively solve the defects of the existing riveting error-proof tool in the aspects of space utilization and detection safety, realizes accurate leak-proof detection, and improves the product quality and the production safety.

Description

Technical Field

[0001] This utility model belongs to the field of riveting processing technology, specifically relating to a tooling for detecting leaks in riveted inserts. Background Technology

[0002] Ensuring correct insert installation is crucial for product quality during riveting. Existing riveting error-proofing fixtures primarily employ mechanical error-proofing structures, with the core component being an error-proofing pin fixed to the template. During operation, the error-proofing pin is linked to a contactor via a connecting rod. When the riveting mold closes, the error-proofing pin contacts the insert surface, triggering the contactor to open or close via rod displacement, thus forming a control loop for insert error detection. However, this traditional riveting error-proofing fixture has several limitations. Firstly, in the riveting of complex products, the densely distributed inserts make the traditional fixture's error-proofing pin and connecting rod structure space-consuming, hindering the efficient arrangement of multiple detection points within the limited mold space. This makes it difficult to effectively detect multiple closely spaced inserts, increasing the likelihood of missed detections. Secondly, existing riveting error-proofing fixtures require detection during the pressing process, which compromises safety. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a tooling for detecting leaks in riveted inserts. This tooling can effectively solve the shortcomings of existing riveted inserts in terms of space utilization and detection safety, thereby achieving accurate leak detection and improving product quality and production safety.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a tooling for detecting leaks in riveted inserts, comprising a tooling base and several detection units;

[0005] The tooling base has a riveting reference part on its top for supporting the workpiece to be processed. The detection unit includes a first insulating sleeve embedded in the riveting reference part and an insulating anti-leakage pin that is floatingly embedded in the first insulating sleeve along the riveting direction. The insulating anti-leakage pin can be inserted into the rivet hole on the workpiece to be processed along the riveting direction.

[0006] The workpiece to be processed, which is placed on the riveting reference part, has a rivet that passes through the rivet hole and can press down the insulating anti-leakage pin to be electrically connected to the buffer spring in the tooling base. The end of the rivet pressing down the top of the insulating anti-leakage pin can abut against the riveting reference part. The insulating anti-leakage pin and the buffer spring are respectively electrically connected to the riveting equipment.

[0007] Optionally, the first insulating sleeve is provided with a limiting cavity for embedding the insulating anti-leakage pin. The insulating anti-leakage pin includes a screw that can be moved from the bottom of the first insulating sleeve into the limiting cavity. One end of the screw embedded in the limiting cavity is threadedly connected to the insulating pin, and a return spring is sleeved on the outer periphery of the screw for lifting the insulating pin out of the surface of the riveting reference part. The two ends of the return spring are respectively supported at the bottom of the insulating pin and the bottom of the limiting cavity.

[0008] Optionally, the tooling base includes a tooling seat for supporting the workpiece to be processed and an insulating mounting base plate that can be installed on a riveting device. The insulating mounting base plate is provided with a first countersunk hole, and a first countersunk bolt that can be inserted into the first countersunk hole is provided to engage with the tooling seat.

[0009] Optionally, the tooling base is provided with a second insulating sleeve on its outer periphery, and the second insulating sleeve is provided with a first conductor ring and a second conductor ring on its outer periphery. An insulating ring is provided between the first conductor ring and the second conductor ring and / or between the first conductor ring and the tooling base and / or between the second conductor ring and the tooling base.

[0010] Optionally, the buffer spring is vertically welded to the surface of the copper plate, the copper plate is laid flat on the insulating mounting base plate, the insulating mounting base plate is provided with a second countersunk hole, a second countersunk bolt that can pass through the copper plate is inserted into the second countersunk hole, and one end of the second countersunk bolt that passes through the insulating mounting base plate is threadedly connected to a pressure block that can press down the copper plate to fit tightly against the insulating mounting base plate.

[0011] Optionally, the diameter of the end of the screw that contacts the buffer spring is larger than the diameter of the buffer spring.

[0012] Optionally, the end of the insulating pin that is inserted into the rivet hole is tapered.

[0013] Optionally, several of the detection units can be connected in series.

[0014] Compared with existing technologies, the beneficial effects achieved by this utility model are as follows: This technical solution determines the riveting status by detecting whether the riveting equipment, the insulating anti-leakage pin, and the buffer spring are in a conductive state after the workpiece is placed on the riveting reference part. This allows the presence of rivets in the riveting hole to be confirmed by detecting the continuity of the circuit before the riveting equipment performs the riveting action, avoiding the significant safety hazards caused by incorrect installation of inserts during the equipment pressing process. Furthermore, compared with traditional riveting error-proofing fixtures, the detection unit used in the detection fixture of this technical solution has a simple structure, occupies less space, and can reasonably arrange multiple detection points within the limited mold space to meet the usage requirements. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a cross-sectional view of the workpiece to be processed with rivets pre-set in the rivet holes in the preferred embodiment of the present invention, when placed on the anti-leakage detection fixture for the riveting insert.

[0017] Figure 2 This is a cross-sectional view of the workpiece to be processed, in a preferred embodiment of the present invention, when the workpiece without a rivet pre-installed in the rivet hole is placed on the anti-leakage detection fixture for the riveting insert;

[0018] Figure 3 This is a schematic diagram of the principle when the detection units are connected in series in a preferred embodiment of this utility model;

[0019] The components include: 1. Workpiece to be processed; 101. Rivet hole; 102. Rivet; 2. Tooling base; 201. Riveting reference part; 3. Insulating mounting base plate; 301. First countersunk hole; 302. First countersunk bolt; 303. Second countersunk hole; 304. Second countersunk bolt; 4. First insulating sleeve; 401. Limiting cavity; 5. Screw; 6. Insulating pin; 7. Return spring; 8. Second insulating sleeve; 9. First conductor ring; 10. Second conductor ring; 11. Insulating ring; 12. Copper plate; 13. Pressure block; 14. Buffer spring. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0021] It should be noted that if directional indicators (such as up, down, bottom, top, etc.) are involved in this embodiment, these directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" 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; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Example 1

[0022] like Figures 1-3 As shown, a riveting insert leak-proof detection fixture includes a fixture base and several detection units. The top of the fixture base is provided with a riveting reference part 201 for supporting the workpiece 1 to be processed. The detection unit includes a first insulating sleeve 4 embedded in the riveting reference part 201 and an insulating leak-proof pin that is floatingly embedded in the first insulating sleeve 4 along the riveting direction. The insulating leak-proof pin can be inserted into the riveting hole 101 on the workpiece 1 to be processed along the riveting direction. The rivet 102 on the workpiece 1 to be processed, which is placed on the riveting reference part 201 and passes through the riveting hole 101, can press down the insulating leak-proof pin to be electrically connected to the buffer spring 14 in the fixture base. The end of the rivet 102 pressing down the top of the insulating leak-proof pin can abut against the riveting reference part 201. The insulating leak-proof pin and the buffer spring 14 are respectively electrically connected to the riveting equipment.

[0023] Specifically, in practical applications, the tooling base is installed on the riveting equipment, and when the workpiece 1 is not placed on the riveting reference part 201, the insulating anti-leakage pin is in its initial position, that is, one end of the insulating anti-leakage pin protrudes from the surface of the riveting reference part 201. Subsequently, the workpiece 1 is placed on the riveting reference part 201 manually or by a robot, and the riveting hole 101 on the workpiece 1 is aligned with the insulating anti-leakage pin along the riveting direction. During this process, since the insulating anti-leakage pin is floating and embedded in the first insulating sleeve 4 along the riveting direction, the first insulating sleeve 4 can prevent the insulating anti-leakage pin from conducting electricity with external structures such as the tooling base and the riveting equipment, and the end of the insulating anti-leakage pin that contacts the workpiece 1 is insulated, thereby preventing external structures from affecting the accuracy of the test results. Furthermore, under the gravity of the workpiece 1, the rivet 102, which passes through the rivet hole 101, can press down the insulating anti-leakage pin. After overcoming its own floating resistance, the insulating anti-leakage pin begins to move downward along the riveting direction until the end of the rivet 102 abuts against the surface of the riveting reference part 201 and the bottom of the insulating anti-leakage pin abuts against the buffer spring 14. At this time, since the insulating anti-leakage pin and the buffer spring 14 are electrically connected to the riveting equipment, when the insulating anti-leakage pin contacts the buffer spring 14, the riveting equipment, the insulating anti-leakage pin, and the buffer spring 14 are in a state of circuit conduction. This circuit conduction signal can be detected by the riveting equipment (the technical means of detecting the circuit conduction signal is existing technology), thus indicating that there is a rivet 102 in the rivet hole 101. When there is no rivet 102 in a certain rivet hole 101, the insulating anti-leakage pin can be inserted into the rivet hole 101 on the workpiece 1, and the insulating anti-leakage pin and the buffer spring 14 remain in a state of non-contact. At this time, the riveting equipment remains open-circuited with the insulating anti-leakage pin and the buffer spring 14. The riveting equipment cannot detect the signal of the circuit being open at this time. Therefore, the riveting equipment can determine that there is a missing insert at this position and can stop the next operation.

[0024] It is important to note that the riveting reference part 201 has a basic positioning function. That is, the riveting reference part 201 can be designed to mimic contours, or it can be supplemented with positioning pins, positioning blocks, or other existing positioning structures used to position the workpiece 1, to ensure the uniqueness of the workpiece 1's position on the riveting reference part 201, while also ensuring that the insulating anti-leakage pin corresponds to the riveting hole 101 on the workpiece 1. Furthermore, compared to traditional riveting error-proofing fixtures, this technical solution determines the riveting status by detecting whether the riveting equipment, the insulating anti-leakage pin, and the buffer spring 14 are in a conductive state after the workpiece 1 is placed on the riveting reference part 201. This allows the presence of a rivet 102 in the riveting hole 101 to be confirmed by detecting the continuity of the circuit before the riveting equipment performs the riveting action, avoiding significant safety hazards caused by incorrect installation of the insert during the equipment's crimping process. Furthermore, compared to traditional riveting error-proofing fixtures, the detection unit used in the detection fixture of this technical solution has a simple structure, occupies less space, and can reasonably arrange multiple detection points within the limited mold space to meet the usage requirements.

[0025] The above, such as Figure 1 As shown, the first insulating sleeve 4 is provided with a limiting cavity 401 for embedding an insulating anti-leakage pin. The insulating anti-leakage pin includes a screw 5 that can be movably inserted from the bottom of the first insulating sleeve 4 into the limiting cavity 401, i.e., the head of the screw 5 is placed outside the limiting cavity 401. One end of the screw 5 embedded in the limiting cavity 401 is threadedly connected to an insulating pin 6. The end of the insulating pin 6 that is inserted into the rivet hole 101 is tapered, so that the insulating pin 6 can be inserted and engaged with the rivet hole 101 on the workpiece 1. At the same time, in this technical solution, the insulating pin 6 cannot be protruded from the bottom of the limiting cavity 401, that is, the relative position between the screw 5 and the first insulating sleeve 4 can be restricted by the head of the screw 5 and the insulating pin 6, so that it cannot be detached from the first insulating sleeve 4. Meanwhile, a return spring 7 is provided on the outer periphery of the screw 5 to lift the insulating pin 6 protruding from the surface of the riveting reference part 201. The two ends of the return spring 7 are respectively supported on the bottom of the insulating pin 6 and the bottom of the limiting cavity 401, so that the insulating anti-leakage pin can automatically adjust its position according to the actual riveting situation. At the same time, it can also enable the insulating anti-leakage pin to return to its initial position after each inspection and wait for the next inspection, increasing the repeatability of the inspection fixture.

[0026] It is important to note that the diameter of the end of screw 5 that contacts the buffer spring 14 is larger than the diameter of the buffer spring 14, and screw 5 is positioned directly above the buffer spring 14. This ensures that screw 5 can stably contact the buffer spring 14 when it moves downwards, guaranteeing the stability of their electrical connection. Simultaneously, the direction of movement of screw 5 coincides with the central axis of the buffer spring 14 to prevent uneven force on the buffer spring 14 during compression, which could cause bending or other issues affecting the electrical connection with screw 5.

[0027] In this embodiment, as Figure 3 As shown, several detection units can be connected in series. When several detection units are connected in series, if a rivet 102 is not pre-set in the rivet hole 101 corresponding to a detection unit, it can be determined that the workpiece 1 to be processed cannot be riveted directly, and the rivet 102 needs to be re-checked and supplemented, thereby effectively improving the riveting quality of the workpiece 1 to be processed. Example 2

[0028] like Figures 1-3 As shown in Embodiment 1, the tooling base includes a tooling seat 2 for supporting the workpiece 1 to be processed and an insulating mounting base plate 3 that can be installed on a riveting device. The insulating mounting base plate 3 has a first countersunk hole 301, and a first countersunk bolt 302 that can engage with the tooling seat 2 passes through the first countersunk hole 301. The insulating mounting base plate 3 provides good insulation, effectively preventing electrical conduction between the tooling base and the riveting device, preventing electrical interference from affecting the accuracy of the test results, and also improving the safety of the entire tooling system.

[0029] Furthermore, such as Figure 1 , Figure 2 As shown, a second insulating sleeve 8 is fitted around the outer periphery of the fixture base 2. A first conductor ring 9 and a second conductor ring 10 are fitted around the outer periphery of the second insulating sleeve 8. An insulating ring 11 is provided between the first conductor ring 9 and the second conductor ring 10, and / or between the first conductor ring 9 and the fixture base 2, and / or between the second conductor ring 10 and the fixture base 2. By providing the second insulating sleeve 8, the first conductor ring 9, the second conductor ring 10, and the insulating ring 11, electrical isolation between different components can be achieved. That is, the second insulating sleeve 8 isolates the fixture base 2 from the first conductor ring 9 and the second conductor ring 10, preventing unnecessary electrical conduction between the fixture base 2 and other components. Furthermore, when several detection units are connected in series, the screw 5 and the buffer spring 14 can be connected in series via wires, with one end of the wire electrically connected to the first conductor ring 9 and the other end electrically connected to the second conductor ring 10, thereby optimizing the circuit structure and improving the stability of the detection.

[0030] In this technical solution, the buffer spring 14 is vertically welded to the surface of the copper plate 12, the copper plate 12 is laid flat on the insulating mounting base plate 3, the insulating mounting base plate 3 is provided with a second countersunk hole 303, a second countersunk bolt 304 that can pass through the copper plate 12 is inserted into the second countersunk hole 303, and one end of the second countersunk bolt 304 that passes through the insulating mounting base plate 3 is threadedly connected to a pressure block 13 that can press down the copper plate 12 to fit tightly against the insulating mounting base plate 3, thereby realizing the fixed installation of the buffer spring 14 and electrical isolation between it and other components.

[0031] Working principle: When the workpiece 1 is not placed on the riveting reference 201, the insulating anti-leak pin is in its initial position, with one end protruding from the surface of the riveting reference 201. Then, the workpiece 1 is placed on the riveting reference 201 manually or by a robot, aligning the riveting hole 101 on the workpiece 1 with the insulating anti-leak pin along the riveting direction. Under the weight of the workpiece 1, the rivet 102, which passes through the rivet hole 101, presses down on the insulating anti-leak pin. After overcoming its own floating resistance, the insulating anti-leak pin begins to move downwards along the riveting direction until the end of the rivet 102 abuts against the surface of the riveting reference 201 and the bottom of the insulating anti-leak pin abuts against the buffer spring 14. At this point, since the insulating anti-leak pin and the buffer spring 14 are electrically connected to the riveting equipment, when the insulating anti-leak pin contacts the buffer spring 14, the riveting equipment, the insulating anti-leak pin, and the buffer spring 14 are in a state of electrical continuity. The signal indicating circuit continuity can be detected by the riveting equipment, indicating that a rivet 102 is present in the riveting hole 101. When a rivet 101 is not filled with a rivet 102, the insulating anti-leakage pin can be inserted into the rivet hole 101 on the workpiece 1, while the insulating anti-leakage pin and the buffer spring 14 remain in a non-contact state. At this time, the riveting equipment maintains an open circuit with the insulating anti-leakage pin and the buffer spring 14, and the riveting equipment cannot detect the signal indicating circuit continuity. Therefore, the riveting equipment can determine that there is a missing insert at that location.

[0032] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A tooling for detecting leaks in riveted inserts, characterized in that: Includes a tooling base and several detection units; The tooling base is provided with a riveting reference part (201) for supporting the workpiece (1) to be processed. The detection unit includes a first insulating sleeve (4) embedded in the riveting reference part (201) and an insulating anti-leakage pin that is floatingly embedded in the first insulating sleeve (4) along the riveting direction. The insulating anti-leakage pin can be inserted into the rivet hole (101) on the workpiece (1) to be processed along the riveting direction. The workpiece (1) to be processed, which is placed on the riveting reference part (201), has a rivet (102) that passes through the rivet hole (101) and can press down the insulating anti-leakage pin to be electrically connected to the buffer spring (14) in the tooling base. The end of the rivet (102) that presses down on the top of the insulating anti-leakage pin can abut against the riveting reference part (201). The insulating anti-leakage pin and the buffer spring (14) are respectively electrically connected to the riveting equipment.

2. The anti-leakage detection fixture for riveted inserts according to claim 1, characterized in that: The first insulating sleeve (4) is provided with a limiting cavity (401) for embedding the insulating anti-leakage pin. The insulating anti-leakage pin includes a screw (5) that can be moved from the bottom of the first insulating sleeve (4) into the limiting cavity (401). One end of the screw (5) embedded in the limiting cavity (401) is threadedly connected to an insulating pin (6). The outer periphery of the screw (5) is provided with a return spring (7) for lifting the insulating pin (6) out of the surface of the riveting reference part (201). The two ends of the return spring (7) are respectively supported at the bottom of the insulating pin (6) and the bottom of the limiting cavity (401).

3. The anti-leakage detection fixture for riveted inserts according to claim 1, characterized in that: The tooling base includes a tooling seat (2) for supporting the workpiece (1) to be processed and an insulating mounting base plate (3) that can be installed on a riveting device. The insulating mounting base plate (3) is provided with a first countersunk hole (301), and a first countersunk bolt (302) that can be inserted into the first countersunk hole (301) is provided to engage with the tooling seat (2).

4. The anti-leakage detection fixture for riveted inserts according to claim 3, characterized in that: The tooling base (2) is provided with a second insulating sleeve (8) on its outer periphery. The second insulating sleeve (8) is provided with a first conductor ring (9) and a second conductor ring (10) on its outer periphery. An insulating ring (11) is provided between the first conductor ring (9) and the second conductor ring (10) and / or between the first conductor ring (9) and the tooling base (2) and / or between the second conductor ring (10) and the tooling base (2).

5. The anti-leakage detection fixture for riveted inserts according to claim 3, characterized in that: The buffer spring (14) is vertically welded to the surface of the copper plate (12). The copper plate (12) is laid flat on the insulating mounting base plate (3). The insulating mounting base plate (3) is provided with a second countersunk hole (303). A second countersunk bolt (304) that can pass through the copper plate (12) is inserted into the second countersunk hole (303). The end of the second countersunk bolt (304) that passes through the insulating mounting base plate (3) is threaded to a pressure block (13) that can press down the copper plate (12) to fit tightly against the insulating mounting base plate (3).

6. The anti-leakage detection fixture for riveted inserts according to claim 2, characterized in that: The diameter of the end of the screw (5) that contacts the buffer spring (14) is larger than the diameter of the buffer spring (14).

7. The anti-leakage detection fixture for riveted inserts according to claim 2, characterized in that: The end of the insulating pin (6) that is inserted into the rivet hole (101) is tapered.

8. The anti-leakage detection fixture for riveted inserts according to claim 1, characterized in that: Several of the aforementioned detection units can be connected in series.

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