Device for detecting passing ability of continuous threaded holes in sheet metal stamping part

Abstract

The utility model discloses a device for detecting the passing ability of a continuous threaded hole in a sheet metal stamping part. A guide component and a fixed shaft component are arranged on a detection bolt. The guide component is a guide column which is arranged at the end part of the detection bolt and is of a conical structure; and the fixed shaft component is a fixed shaft ring cover which is movably sleeved on the detection bolt along the axial direction of the detection bolt and is pressed and attached to the plane at the port of the threaded hole. Through the guide member, the detection bolt can be driven to accurately and rapidly penetrate into the threaded hole, and the problem that a standard bolt and a threaded hole are difficult to align smoothly at one time due to tolerance fit at present is solved, so that the operation efficiency of continuous threaded hole detection can be improved. And furthermore, the detection bolt and the threaded hole are driven to be coaxial through the fixed shaft component, so that the detection bolt can be smoothly screwed into the threaded hole in a coaxial state, and the problems of screwing clamping stagnation formed by the detection bolt and the threaded hole and damage to threads due to axial deflection are avoided.

Description

Technical Field

[0001] This application relates to the field of thread hole passability testing technology for sheet metal stamping parts, and in particular to a device for testing the passability of continuous thread holes on sheet metal stamping parts. Background Technology

[0002] Automotive sheet metal stamping parts are parts made by stamping metal sheets into the required shapes and sizes. These parts have the advantages of being lightweight, high-strength, easy to process, and low-cost. They are an important part of automobile manufacturing and are widely used in the body, chassis, engine compartment, and other parts of automobiles. Their quality directly affects the overall performance and safety of automobiles.

[0003] Threaded holes are crucial structures on automotive sheet metal stampings used for connecting and securing other components. They are formed in a single stamping process and then further machined into threaded holes. Passability testing is a critical step in ensuring the assembly quality and functionality of the parts, preventing issues such as wear on the threading tools during the hole-forming process that could hinder successful assembly of the sheet metal parts. If the threaded holes have dimensional deviations, shape distortions, or positional misalignments, it will directly affect the assembly quality and functionality of the parts, and may even lead to a decrease in overall vehicle performance and an increase in safety hazards.

[0004] Currently, threaded hole machining is typically performed using mechanical methods, which offer high positional accuracy. The main inspection items are the integrity of the internal thread, the inner diameter, and the passability issues caused by incomplete removal of waste material due to tool wear over long-term machining. Therefore, a convenient inspection method in actual production is for the operator to hold a standard bolt that mates with the threaded hole and screw it into the hole. If the standard bolt passes through smoothly, it indicates that the threaded hole machining quality meets the standards; if it fails to pass through, it indicates a machining defect in the threaded hole, requiring rework and inspection.

[0005] When inspecting threaded holes on sheet metal stampings, there are usually many threaded holes on a single sheet metal part. During the inspection process, please refer to the instructions provided. Figure 2 As shown, the standard bolt is moved sequentially from the bottom threaded hole to each threaded hole for screwing inspection. However, because the standard bolt and the threaded hole are tolerance-fitted, it is difficult to align the standard bolt and the threaded hole perfectly in one go during manual movement, which may result in issues such as… Figure 4 The standard bolt shown is axially misaligned with the threaded hole, preventing it from being screwed into the hole smoothly and causing damage to the internal threads. Figure 5The standard bolt shown is misaligned with the end face of the threaded hole, which prevents the standard bolt from being screwed into the threaded hole smoothly and quickly. In the automotive assembly line processing operation, this will greatly affect the efficiency of the passability inspection process and the continuity of the upstream and downstream related processes. Summary of the Invention

[0006] To address the aforementioned problems, this application aims to provide a continuous thread hole passability testing device for sheet metal stamping parts. This device solves the current problem that the standard bolt and the thread hole are difficult to align smoothly in one go due to tolerance matching, the problem that the detection bolt and the thread hole are stuck due to axial misalignment, and the problem that the thread is damaged. This device can improve the operational efficiency of continuous thread hole testing and ensure the processing quality of the thread hole.

[0007] To achieve the above objectives, the technical solution adopted in this application is as follows: a continuous thread hole passability detection device for sheet metal stamping parts, wherein the passability detection device is a detection bolt that mates with the thread hole, characterized in that: a guide member is provided on the detection bolt to guide it through the thread hole, and a fixed axis member is also provided on the detection bolt to drive the detection bolt to be coaxial with the thread hole.

[0008] Preferably, the guide member is a guide post with a tapered structure provided at the end of the detection bolt.

[0009] Preferably, the fixed-axis component is a fixed-axis ring cover that moves axially along the detection bolt, is sleeved on the detection bolt, and presses against the plane at the threaded hole port.

[0010] Preferably, a pressure spring is provided between the fixed-axis ring cover and the side of the detection bolt away from the threaded hole.

[0011] The beneficial effects of this application are: the passability detection device can drive the detection bolt to be accurately and quickly inserted into the threaded hole through the guide component, which solves the problem that the standard bolt and the threaded hole are difficult to align smoothly in one go due to the tolerance fit, thereby improving the operation efficiency of continuous threaded hole detection.

[0012] Furthermore, by using a fixed-axis component to drive the test bolt and the threaded hole to be coaxial, the test bolt can be smoothly screwed into the threaded hole in a coaxial state, avoiding the problem of the test bolt getting stuck in the threaded hole due to axial deviation, as well as damage to the thread. Attached Figure Description

[0013] Figure 1 This is a structural diagram of an automotive sheet metal stamping part.

[0014] Figure 2 for Figure 1 Enlarged view of the cross-sectional structure at point A.

[0015] Figure 3 This diagram illustrates the continuous displacement detection of a standard bolt between adjacent threaded holes.

[0016] Figure 4 This diagram illustrates the axial misalignment between a standard bolt and its adjacent threaded hole.

[0017] Figure 5 This diagram illustrates the misalignment between the current standard bolt and the adjacent threaded hole.

[0018] Figure 6 This is a diagram illustrating the operation of the test bolt being quickly inserted into the threaded hole via a guide post, as described in this application.

[0019] Figure 7 For the purpose of this application Figure 6 The diagram shows the axial misalignment between the bolt and the threaded hole as detected on the basis.

[0020] Figure 8 This is a schematic diagram of the fixed-axis ring cover and pressure spring structure installed on the test bolt in this application.

[0021] Figure 9 This is a diagram showing the alignment of the test bolt with the stamped part at the fixed-axis ring cover and the threaded hole port of this application.

[0022] Figure 10 For the purpose of this application Figure 9 The diagram shows the test bolt being screwed into the threaded hole based on the fixed axis.

[0023] In the diagram: a - threaded hole; 4 - sheet metal stamping part; 5 - standard bolt. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions of this application will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] See attached document Figures 1-10 The diagram shows a continuous threaded hole passability testing device for sheet metal stamping parts. This device consists of a testing bolt 1 that mates with the threaded hole. Currently, the operator holds the testing bolt 1, aligns it with the threaded hole, and screws it into the hole to check the passability of the threaded hole. To improve the operational efficiency in continuous threaded hole testing, such as... Figure 6 As shown, the inspection bolt 1 is provided with a guide member that guides it through the threaded hole. The guide member can drive the inspection bolt 1 to be accurately and quickly inserted into the threaded hole, solving the problem that the standard bolt and the threaded hole are difficult to align smoothly in one go due to the tolerance fit, thereby improving the operation efficiency of continuous threaded hole inspection.

[0026] Based on the above-mentioned method of guiding the detection bolt 1 to correspond with the threaded hole position through the guide component, in order to further solve the problem of axial misalignment between the detection bolt 1 and the threaded hole, such as... Figure 8-9 As shown, the testing bolt 1 is also provided with a fixed-axis component that drives the testing bolt 1 to be coaxial with the threaded hole. Based on the aforementioned alignment of the testing bolt 1 with the threaded hole, this fixed-axis component further drives the testing bolt 1 to be coaxial with the threaded hole. In this coaxial state, the testing bolt 1 can be smoothly screwed into the threaded hole, avoiding the problem of jamming caused by axial misalignment and damage to the threads.

[0027] Specifically, such as Figure 6 As shown, the guiding member is a tapered guide post 11 disposed at the end of the detection bolt 1. The outer diameter of the tapered guide post 11 gradually decreases towards the outer end, so that the outer diameter of the outer end of the guide post 11 is smaller than the inner diameter of the threaded hole. This allows the guide post 11 to smoothly pass into the threaded hole, enabling the detection bolt 1 to quickly align with the threaded hole and perform a screw-in detection operation. This solves the problem of difficulty in smoothly aligning standard bolts because the outer diameter of the bolt end is the same as the inner diameter of the threaded hole.

[0028] After the test bolt 1 is guided into the threaded hole by the guide post 11, to ensure that the test bolt 1 is coaxial with the threaded hole, as follows: Figure 8-9 As shown, the fixed-axis component is a fixed-axis ring cover 2 that moves axially along the test bolt 1, is sleeved on the test bolt 1, and presses against the plane at the end of the threaded hole. After the guide post 11 is inserted into the threaded hole, the fixed-axis ring cover 2 on the test bolt 1 makes flat contact with the surface of the stamped part at the end of the threaded hole. In this flat contact state, the fixed-axis ring cover 2 drives the test bolt 1 and the threaded hole to be in a coaxial state. Then, because the fixed-axis ring cover 2 can move axially on the test bolt 1, the test bolt can be continuously screwed in to perform a passability inspection operation while the fixed-axis ring cover 2 is flat against the surface of the stamped part. This solves the problem of the test bolt 1 not being able to be screwed in smoothly due to coaxial deviation with the threaded hole, as well as the problem of damage to the internal and external threads.

[0029] To further improve the convenience and efficiency of the above-mentioned testing operations, such as... Figure 8-9As shown, a compression spring 3 is further provided between the fixed-axis ring cover 2 and the side of the detection bolt 1 away from the threaded hole. The two ends of the compression spring 3 are fixedly connected to the fixed-axis ring cover 2 and the detection bolt 1, respectively. This compression spring 3 serves two purposes: firstly, it improves the relative stability of the fixed-axis ring cover 2 and the detection bolt 1; secondly, during the detection process, it ensures that the external thread of the fixed-axis ring cover 2 contacts the surface of the stamped part before the external thread of the detection bolt 1, preventing the fixed-axis ring cover 2 from sliding to the outer end of the detection bolt 1. Before the external thread of the detection bolt engages with the internal thread of the threaded hole, it cannot provide coaxial positioning. That is, the fixed-axis ring cover 2 first makes flat contact with the surface of the stamped part, and then, by compressing the compression spring 3, the external thread of the detection bolt 1 contacts the internal thread of the threaded hole again. The fixed-axis ring cover 2 first achieves coaxial positioning. Then, by screwing in the detection bolt 1 and compressing the compression spring 3... Figure 10 As shown, the inspection of the threaded hole is completed after the inspection bolt 1 passes through the threaded hole.

[0030] After the inspection is completed, when the external thread of the inspection bolt 1 disengages from the internal thread of the threaded hole, the elastic action of the compression spring 3 can drive the guide post 11 and the inspection bolt 1 as a whole to quickly disengage from the current threaded hole, and can continuously and quickly enter the passability inspection operation of the next threaded hole, thereby further improving the inspection efficiency of continuous threaded holes.

[0031] The principle of this application is as follows: When performing the passability test of continuous threaded holes on sheet metal stamping parts, the operator holds the test bolt 1 and moves it to the threaded hole. Then, the guide post 11 at the end of the test bolt 1 is quickly inserted into the threaded hole to achieve the correspondence between the test bolt 1 and the threaded hole. At the same time, the fixed axis ring cover 2 is in flat contact with the stamping surface at the end of the threaded hole, driving the test bolt 1 to be coaxial with the threaded hole. Then, the test bolt 1 squeezes the pressure spring 3 and screws the test bolt 1 into the threaded hole and penetrates the threaded hole. Then, the test bolt 1 is rotated in the opposite direction to disengage from the threaded hole, and can then be transferred to the next threaded hole for passability test.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this application. Various changes and modifications may be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims.

Claims

1. A device for detecting the passability of continuous threaded holes on sheet metal stamping parts, wherein the device is a detection bolt (1) that mates with the threaded hole, characterized in that: The test bolt (1) is provided with a guide member that passes through the threaded hole, and the test bolt (1) is also provided with a fixed axis member that drives the test bolt (1) to be coaxial with the threaded hole.

2. The passability detection device according to claim 1, characterized in that: The guide member is a guide post (11) with a tapered structure provided at the end of the detection bolt (1).

3. The passability detection device according to claim 2, characterized in that: The fixed axis component is a fixed axis ring cover (2) that moves axially along the detection bolt (1), is sleeved on the detection bolt (1), and is pressed against the plane at the threaded hole port.

4. The passability detection device according to claim 3, characterized in that: A pressure spring (3) is provided between the fixed axis ring cover (2) and the side of the detection bolt (1) away from the threaded hole.

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