Filter cover plate thread detection device

Abstract

The utility model discloses a filter cover plate thread detection device which comprises a rack, a detection bench is horizontally arranged in the middle of the rack, and a detection mechanism is arranged on the detection bench. The detection mechanism comprises a stepping motor, an output shaft of the stepping motor is upwards connected with a thread plug gauge, the thread plug gauge is provided with a charging tray used for bearing the filter cover plate, the thread plug gauge is located in a central hole of the charging tray and upwards protrudes out of the central hole, and the charging tray on the two sides of the thread plug gauge is downwards connected with wire guide rods respectively; the wire guide rod downwards penetrates through the detection table and is in sliding fit with the detection table, the part, between the detection table and the material disc, of the wire guide rod is sleeved with a jacking spring, and the jacking spring is used for tensioning the material disc; a torque sensor is arranged on an output shaft of the stepping motor and connected with an electric control device, and the electric control device is connected with the stepping motor. According to the utility model, the threaded holes of the filter cover plate are mechanically detected, inherent defects of manual detection are eliminated, the detection efficiency and consistency are obviously improved, and the device is suitable for batch production scenes.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter production detection equipment technical field, concretely relates to filter cover plate screw thread on -line detection technology. BACKGROUND

[0002] In the filter production process, the processing quality of the cover plate screw thread directly affects the sealing and reliability of the product and the whole vehicle assembly. At present, the detection of the filter cover plate screw thread in the industry mainly relies on manual operation, and the technical means has the following significant defects:

[0003] Low detection efficiency: manual detection needs to visually inspect or manually rotate the plug gauge into the thread hole one by one, which takes a long time and is difficult to match the rhythm of the automatic production line, resulting in low production efficiency. Early filter production scale is small, and manual detection can meet the demand; but with the improvement of the requirements of automobile industry on filter capacity and precision, the traditional detection method gradually becomes a production bottleneck.

[0004] High risk of missed detection and unstable results: the traditional detection tool (such as fixed plug gauge) lacks dynamic feedback mechanism, can only judge whether the thread is qualified through "go-no-go gauge" principle, and cannot monitor abnormal resistance or position deviation in the detection process. Workers are prone to fatigue after a long time of work, and are prone to visual fatigue or operation error for slight defects such as thread knock, tooth deformation and perpendicularity deviation, resulting in missed detection, and unqualified products may flow into subsequent processes or even market, causing quality accidents.

[0005] Subjective determination standard: manual detection relies on operator experience and lacks objective quantitative index, which is prone to misjudgment due to individual differences, and the consistency of detection results is poor.

[0006] Insufficient universality: the traditional plug gauge tool (such as fixed plug gauge) is designed fixedly, which is difficult to adapt to different specifications of the thread hole (such as M12x1.5 and M18x1.5), and the replacement of detection equipment needs to be re-adjusted, increasing the production cost and time.

[0007] Therefore, it is necessary to provide a filter cover plate screw thread detection device to improve the detection efficiency, precision and universality, and completely eliminate the inherent defects of manual detection. UTILITY MODEL CONTENTS

[0008] The utility model aims at providing a filter cover plate screw thread detection device, which eliminates the inherent defects of manual detection through the step motor driven plug gauge head.

[0009] To achieve the above purpose, the filter cover plate screw thread detection device of the utility model comprises a rack, a detection table is horizontally arranged in the middle of the rack, and a detection mechanism is arranged on the detection table.

[0010] The detection mechanism comprises a stepping motor arranged below the detection table, an output shaft of the stepping motor extends upwardly from the detection table and is connected with a threaded plug gauge through a shaft coupling, a material disc horizontally arranged is arranged on the threaded plug gauge, the material disc is provided with a central hole in the center, the threaded plug gauge is located in the central hole and protrudes upwardly from the central hole, and the material disc is used for bearing the filter cover plate; the material disc on both sides of the threaded plug gauge is connected with a wire rod downwardly, the detection table and the wire rod are provided with a rod hole in one-to-one correspondence, the wire rod passes through the rod hole downwardly and is in sliding fit with the detection table, a tension spring is sleeved on the wire rod between the detection table and the material disc, and the tension spring is used for tensioning the material disc; the threaded plug gauge is matched with a threaded hole on the filter cover plate;

[0011] A torque sensor is arranged on the output shaft of the stepping motor, the torque sensor is connected with an electric control device, and the electric control device is connected with the stepping motor.

[0012] The detection mechanism is provided with two sets or more sets of detection mechanisms at intervals on the detection table.

[0013] The electric control device is connected with a red indicator lamp and a green indicator lamp.

[0014] Each set of detection mechanisms is correspondingly provided with a set of sensing devices, the sensing device comprises a mounting frame, the mounting frame is fixedly connected to the lower surface of the detection table; a starting proximity switch and a reverse proximity switch are connected to the mounting frame, and the starting proximity switch and the reverse proximity switch correspond to the same wire rod;

[0015] When the filter cover plate is placed on the material disc and the plug gauge has not been screwed into the threaded hole on the filter cover plate, the bottom end position of the wire rod is an initial position;

[0016] When the plug gauge is screwed into and penetrates through the threaded hole on the filter cover plate, the bottom end position of the wire rod is an end position;

[0017] The position of the starting proximity switch is adjacent to the initial position, and the reverse proximity switch is adjacent to the end position.

[0018] The starting proximity switch and the reverse proximity switch are connected with the electric control device.

[0019] Each set of detection mechanisms is correspondingly provided with a set of transfer devices, the transfer device comprises a mechanical arm mounted on the upper surface of the detection table, the mechanical arm is connected with a clamping jaw matched with the filter cover plate; and the mechanical arm is connected with the electric control device.

[0020] The mechanical arm is connected with a counter, the counter is connected with the electric control device, the counter is used for counting the total number of the detected filter cover plates, and the counter is arranged on the rack.

[0021] The utility model has the advantages that:

[0022] 1、The detection efficiency and consistency are obviously improved

[0023] The stepping motor drives the threaded plug gauge to rotate according to the preset stroke, replaces manual screwing operation, avoids subjective errors, avoids inaccurate rotation angle of the threaded plug gauge, ensures that the detection covers the whole length of the thread, ensures that the detection process is standardized, and the detection result is strong in consistency.

[0024] Multiple detection mechanisms run in parallel (such as double-station design), and the detection efficiency is greatly improved, which is suitable for batch production scenes.

[0025] 2. Accurate torque monitoring determines the quality of the thread

[0026] The torque sensor monitors the output torque of the stepping motor in real time, and a preset threshold (such as 1.5 N·m) is used as the determination standard; the preset threshold is specified by the designer according to the specific conditions of the filter cover plate, its threaded hole and the threaded plug gauge for detection (such as determined through tests).

[0027] If the torque is lower than the threshold and the plug gauge completely penetrates the threaded hole, it indicates that the detection is qualified; and when the torque does not exceed the limit, the green light is always on.

[0028] If the torque exceeds the limit, it indicates that the detection is unqualified. Most torque exceeding cases are accompanied by the threaded plug gauge not penetrating the threaded hole; in individual cases, even if the threaded hole is penetrated, but the torque exceeds the limit, it also indicates that the threaded hole has slight defects such as thread impact, tooth shape deformation and perpendicularity deviation. When the torque exceeds the limit, the torque sensor triggers the green light to turn off the red light.

[0029] 3. The jacking spring provides a constant pulling force to ensure that the tray is stable during the detection process and can reset the tray under the action of the elastic force.

[0030] 4. The sliding cooperation design of the guide rod and the detection table ensures that the vertical movement of the tray has high trajectory accuracy.

[0031] 5. The stepping motor is started and reversed by the proximity switch, which reduces manual intervention, has high automation degree, and the action is timely and accurate.

[0032] 6. Different specifications of threaded plug gauges and different specifications of trays can be replaced, so as to adapt to various workpieces (not limited to filter cover plates) and improve the versatility of the equipment.

[0033] 7. The modular design supports the expansion of the number of detection mechanisms (such as adding more stations), which flexibly adapts to changes in production capacity demand. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0035] EMBODIMENT

[0036] As Figure 1As shown, the filter cover plate thread detection device of the utility model includes frame 1, the middle part of frame 1 is horizontally provided with detection table 2, detection table 2 is provided with detection mechanism;

[0037] The detection mechanism includes the stepper motor 3 arranged below the detection table 2, the output shaft of the stepper motor 3 extends upwardly out of the detection table 2 and is connected with the thread plug gauge 5 through the shaft coupling 4, the thread plug gauge 5 is provided with the tray 6 arranged horizontally, the tray 6 has the central hole 7 in the center, the thread plug gauge 5 is located in the central hole 7 and protrudes upwardly out of the central hole 7, and the tray 6 is used for bearing the filter cover plate 8 (the detected part); the tray 6 on both sides of the thread plug gauge 5 is connected with the guide rod 9 downwardly respectively, the detection table 2 and the guide rod 9 are provided with the rod hole one by one, the guide rod 9 passes through the rod hole downwardly and is in sliding fit with the detection table 2, the top pressing spring 10 is sleeved on the guide rod 9 between the detection table 2 and the tray 6, and the top pressing spring 10 is used for tensioning the tray 6; the thread plug gauge 5 is matched with the threaded hole on the filter cover plate 8;

[0038] The output shaft of the stepper motor 3 is provided with the torque sensor (or torque switch), the torque sensor is connected with the electric control device, and the electric control device is connected with the stepper motor 3. The electric control device is a single-chip microcomputer or an integrated circuit. The torque sensor and the electric control device are conventional technologies, and the diagram is not shown.

[0039] By adopting the above technical scheme, the thread plug gauge 5 can be opposite to the threaded hole on the detected workpiece (the filter cover plate 8) by the mechanical structure, the thread plug gauge 5 is driven to rotate by the stepper motor 3 according to the predetermined stroke, the instability and unreliability of manual operation are avoided, the maximum tightening force is constrained by the torque sensor (or torque switch), the head of the thread plug gauge 5 can completely penetrate the detected threaded hole when the maximum tightening force is reached (or before), which indicates that the threaded hole is qualified, the head of the thread plug gauge 5 cannot penetrate the detected threaded hole when the maximum tightening force is reached, which indicates that the threaded hole is unqualified, thereby the manual subjective hand twisting and visual inspection can be completely replaced, and the detection result has better consistency compared with manual inspection.

[0040] The top pressing spring 10 provides constant tension, ensures that the state of the tray 6 is stable during the detection process, and enables the tray 6 to reset under the action of the elastic force.

[0041] The sliding fit design of the guide rod 9 and the detection table 2 ensures that the vertical movement of the tray 6 has high trajectory accuracy.

[0042] The detection mechanism is provided with two sets or more sets on the detection table 2. Multiple detection mechanisms can perform work station parallel detection, thereby improving the detection efficiency.

[0043] The electric control device is connected with the red indicator light 12 and the green indicator light 11.

[0044] Before detection, according to the size of the threaded hole on the same batch of detected parts (filter cover plate 8), the corresponding threaded plug gauge 5 is used; the staff adjusts the rotation angle setting of the stepping motor 3 according to the effective thread depth of the threaded hole, so that the threaded plug gauge 5 can smoothly and completely pass through the threaded area in the screwing operation, and the full length and precision of the thread are verified.

[0045] The working process of the embodiment is as follows:

[0046] 1, place the filter cover plate 8

[0047] Place the filter cover plate 8 to be detected on the tray 6, and align the detected threaded hole with the threaded plug gauge 5. The tightening spring 10 tightens the tray 6 to prevent the filter cover plate 8 from shifting during detection.

[0048] 2, start the detection mechanism

[0049] Start the stepping motor 3 through the electric control device, and the output shaft of the stepping motor 3 drives the threaded plug gauge 5 to rotate through the shaft coupling 4, and at the same time, the threaded plug gauge 5 is gradually screwed into the threaded hole of the filter cover plate 8, in the process, the filter cover plate 8 is forced to press down, the tray 6 compresses the tightening spring 10, and the lead rod 9 moves vertically downward.

[0050] 3, torque dynamic monitoring

[0051] Qualified condition: if the threaded hole is qualified (no deformation, no knocking, and verticality meets the standard), the threaded plug gauge 5 can completely pass through the threaded hole under the drive of the stepping motor 3. In this process, the torque detected by the torque sensor (or torque switch) is always lower than the preset value. The complete passing of the threaded plug gauge 5 through the threaded hole indicates that the detection is qualified, and the electric control device controls the green indicator light 11 to turn on.

[0052] Unqualified condition: if the threaded hole has defects (such as tooth type deformation, verticality out of tolerance or foreign matter blockage), the threaded plug gauge 5 is blocked when it is screwed in, and the stepping motor 3 has not completed the predetermined rotation angle, and the torque sensor (or torque switch) detects that the value exceeds the preset value. The electric control device stops the stepping motor 3, the red indicator light 12 is on, and the filter cover plate 8 is marked as unqualified.

[0053] 4, reset and next cycle

[0054] After detection (after detecting whether the threaded hole of the workpiece is qualified), the stepping motor 3 is reversed, the threaded plug gauge 5 is withdrawn from the threaded hole and reset to the initial position. The filter cover plate 8 is removed and is correspondingly classified as qualified or unqualified, the tightening spring 10 resets the tray 6, and the next filter cover plate 8 to be detected is prepared to be received.

[0055] When two or more sets of detection mechanisms are provided in the utility model, each station can operate independently, and the detection efficiency is improved.

[0056] The working process of the embodiment one realizes efficient and accurate detection of the filter cover plate 8 thread by combining mechanical structure and torque monitoring. The multi-station parallel design further improves productivity, which is suitable for quality control link of batch production of automobile filters.

[0057] Embodiment

[0058] As Figure 1 shown, the difference from the embodiment one is that:

[0059] I. In terms of structure, each set of detection mechanism is correspondingly provided with a set of sensing device. The sensing device includes a mounting bracket 13 fixedly connected to the lower surface of the detection table 2. A start proximity switch 14 and a reverse proximity switch 15 are connected to the mounting bracket 13. The start proximity switch 14 and the reverse proximity switch 15 are both corresponding to the same wire rod 9 (the material of the wire rod 9 is matched with the proximity switch).

[0060] When the filter cover plate 8 is placed on the tray 6 and the plug gauge has not been screwed into the threaded hole on the filter cover plate 8, the bottom end position of the wire rod 9 is the initial position.

[0061] When the plug gauge is screwed into and penetrates the threaded hole on the filter cover plate 8, the bottom end position of the wire rod 9 is the end position.

[0062] The position of the start proximity switch 14 is adjacent to the initial position, and the reverse proximity switch 15 is adjacent to the end position. The start proximity switch 14 is higher than the reverse proximity switch 15. During the process of screwing the plug gauge into the threaded hole, the filter cover plate 8 will be pulled down, thereby pressing down the tray 6 and the wire rod 9.

[0063] The start proximity switch 14 and the reverse proximity switch 15 are both connected to the electric control device.

[0064] Each set of detection mechanism is correspondingly provided with a set of transfer device. The transfer device includes a mechanical arm 16 installed on the upper surface of the detection table 2. The mechanical arm 16 is connected with a jaw 17 matched with the filter cover plate 8. The mechanical arm 16 is connected with the electric control device.

[0065] The mechanical arm 16 is connected with a counter 18 connected with the electric control device. The counter 18 is used to count the total number of detected filter cover plates 8, and the counter 18 is arranged on the rack 1. The electric control device is preferably connected with a display screen (the display screen is not shown in the figure).

[0066] II. Compared with the embodiment one, the working process of the embodiment has the following characteristics:

[0067] The action of rotating the filter cover plate 8 in the first step is completed by the mechanical arm 16, and the counter 18 is increased by 1 each time the filter cover plate 8 is placed.

[0068] In the second step, the starting of the stepping motor 3 is triggered by the starting proximity switch 14, and when the starting proximity switch 14 is triggered, it means that the filter cover plate 8 has been placed on the tray 6, and the gravity of the filter cover plate 8 makes the compression spring 10 compressed by a certain amount, so that the lead rod 9 is correspondingly lowered to the starting proximity switch 14 to trigger the starting proximity switch 14.

[0069] In the fourth step, the stepping motor 3 is reversed, which is normally triggered by the reversing proximity switch 15. When the reversing proximity switch 15 is triggered, it means that the stepping switch has rotated a predetermined rotation angle, so that the threaded plug gauge 5 is correspondingly screwed into the threaded hole of the filter cover plate 8 to cover the entire threaded area of the threaded hole, so that the filter cover plate 8 is pulled down by a certain depth (matching the entire threaded area of the threaded hole), and the lead rod 9 is further lowered to trigger the reversing proximity switch 15, which means that the detection is qualified. When the detection is unqualified, the stepping motor 3 has not completed the predetermined rotation angle, and the torque sensor (or torque switch) detection value exceeds the preset value. The electric control device stops the stepping motor 3, and the red indicator light 12 is on. This is an individual abnormal situation, and the stepping motor 3 is reversed by manual control.

[0070] The above embodiments are only used to illustrate but not to limit the technical solutions of the present application. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present application can still be modified or replaced equivalently without departing from the spirit and scope of the present application. Any modification or partial replacement should be covered in the scope of the claims of the present application.

Claims

1. A filter head panel thread inspection apparatus comprising a frame, characterised in that: The middle part of the frame is horizontally provided with a detection table, and the detection table is provided with a detection mechanism; The detection mechanism comprises a stepping motor arranged below the detection table, an output shaft of the stepping motor upwardly protruding from the detection table and connected with a threaded plug gauge through a shaft coupling, the threaded plug gauge being arranged at a horizontal tray, the tray being provided with a central hole, the threaded plug gauge being located in the central hole and protruding upwardly from the central hole, the tray being used for carrying the filter cover plate, the tray on both sides of the threaded plug gauge being respectively connected with a wire rod, the detection table being provided with a rod hole corresponding to the wire rod, the wire rod downwardly penetrating through the rod hole and being in sliding fit with the detection table, a tension spring being sleeved on the wire rod between the detection table and the tray, the tension spring being used for tensioning the tray, the threaded plug gauge being matched with a threaded hole on the filter cover plate; The output shaft of the stepping motor is provided with a torque sensor, the torque sensor being connected with an electric control device, and the electric control device is connected with the stepping motor.

2. The filter head thread inspection apparatus of claim 1, wherein: The detection mechanism is provided with two or more sets of detection mechanisms at intervals on the detection table.

3. The filter head thread inspection apparatus of claim 2, wherein: The electric control device is connected with a red indicator light and a green indicator light.

4. The filter head thread inspection apparatus of claim 3, wherein: Each set of detection mechanism is provided with a set of sensing device, the sensing device comprising a mounting frame fixedly connected to the lower surface of the detection table, a start proximity switch and a reverse proximity switch connected to the mounting frame, the start proximity switch and the reverse proximity switch corresponding to the same wire rod; When the filter cover plate is placed on the tray and the plug gauge has not been screwed into the threaded hole on the filter cover plate, the bottom end position of the wire rod is the initial position; When the plug gauge is screwed into and penetrates through the threaded hole on the filter cover plate, the bottom end position of the wire rod is the end position; The position of the start proximity switch is adjacent to the initial position, and the reverse proximity switch is adjacent to the end position. The start proximity switch and the reverse proximity switch are connected with the electric control device.

5. The filter head thread inspection apparatus of claim 4, wherein: Each set of detection mechanism is provided with a set of transfer device, the transfer device comprising a mechanical arm mounted on the upper surface of the detection table, the mechanical arm being connected with a jaw matched with the filter cover plate, and the mechanical arm being connected with the electric control device.

6. The filter cover plate thread inspection device of claim 5, wherein: The mechanical arm is connected with a counter, the counter being connected with the electric control device, the counter being used for counting the total number of the detected filter cover plates, and the counter being arranged on the frame.

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