A process for detecting missed welds in sheet metal parts

Abstract

This invention relates to the field of weld defect detection technology, specifically a weld defect detection process for sheet metal parts, comprising the following steps: S1, Installing the weld defect detection device: Install the transmission belt inside the transmission box, install the first transmission motor at the position corresponding to the transmission belt on the front side of the transmission box, fix the positioning component to the outside of the transmission belt, fix the mounting bracket to one end of the upper side of the transmission box, install the detection component inside the mounting bracket, and install the electrical control box at the lower end of the mounting bracket; S2, Sheet metal part positioning processing; S3, Weld defect detection; S4, Sheet metal parts sorting and exporting. This invention automatically detects weld defects in sheet metal parts using the detection component, reducing manual operation time. The positioning component positions the sheet metal parts and adjusts their position. The guide plate distinguishes the sheet metal parts, improving the convenience of the weld defect detection process. The positioning component vibrates the sheet metal parts, removing dust and debris from the outside of the sheet metal parts, improving detection accuracy.

Description

Technical Field

[0001] This invention relates to the field of weld defect detection technology, specifically a weld defect detection process for sheet metal parts. Background Technology

[0002] Sheet metal processing is a comprehensive cold working process for thin metal sheets, including shearing, punching / cutting / combined cutting, bending, welding, riveting, splicing, and forming. Its significant characteristic is that the thickness of the same part is consistent. Products processed by sheet metal processing are called sheet metal parts. Sheet metal parts are made by welding. To ensure the strength of the welds, weld point inspection is carried out after welding to ensure the pass rate of sheet metal parts.

[0003] However, current sheet metal part defect detection processes rely entirely on manual inspection, requiring manual adjustment of the sheet metal part's position. This process is inconvenient, inefficient, and lacks precision. Furthermore, direct inspection of the sheet metal part is susceptible to errors due to dust and debris obscuring defective welds, leading to misjudgments and affecting accuracy. Therefore, those skilled in the art have provided a sheet metal part defect detection process to address the problems described in the background section. Summary of the Invention

[0004] The purpose of this invention is to provide a process for detecting missing welds in sheet metal parts, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a process for detecting incomplete welds in sheet metal parts, comprising the following steps:

[0006] S1. Install the leak detection device: Install the transmission belt inside the transmission box, install the first transmission motor at the position of the front of the transmission box corresponding to the position of the transmission belt, fix the positioning component to the outside of the transmission belt, fix the mounting bracket to one end of the upper side of the transmission box, install the detection component inside the mounting bracket, install the electrical control box at the lower end of the mounting bracket, fix the receiving box to one side of the transmission box, install the partition plate inside the receiving box, install the guide plate inside the transmission box near the receiving box, install the second transmission motor at the position of the lower side of the transmission box corresponding to the position of the guide plate, and fix the support frame at the other end of the lower side of the transmission box.

[0007] S2. Sheet metal part positioning process: Take out the sheet metal parts to be inspected, sort out the easily distinguishable sheet metal parts with missing welds, place the sheet metal parts that cannot be distinguished by the naked eye on the upper side of the positioning component, fix the sheet metal parts, and the positioning component moves to make the sheet metal parts vibrate, removing dust and debris from the outer surface of the sheet metal parts.

[0008] S3. Missing Weld Detection: The first drive motor drives the drive belt to rotate, and the drive belt drives the positioning component to move. When the positioning component moves to the lower position of the detection component, the detection component moves to detect missing welds on the sheet metal part. During the detection process, the positioning component adjusts the angle of the sheet metal part, and the detection component transmits the detection data to the inside of the electrical control box. The electrical control box processes the detection data and determines the missing weld situation.

[0009] S4. Sheet Metal Part Classification and Export: When a missing weld occurs, the second drive motor rotates the guide plate to adjust its angle. The electrical control box controls the positioning component to release the sheet metal part. The sheet metal part, guided by the guide plate, allows the material to be guided into the corresponding partition area of ​​the internal partition of the receiving box. When no missing weld occurs, the second drive motor rotates the guide plate to adjust its angle. The electrical control box controls the positioning component to release the sheet metal part. The sheet metal part, guided by the guide plate, allows the material to be guided into the corresponding partition area of ​​the internal partition of the receiving box.

[0010] As a further aspect of the present invention: the detection component in S1 includes a third drive motor, a connecting rod is provided on the lower side of the third drive motor, an electric adjusting telescopic rod is provided on one side of the connecting rod, a detection plate is provided at the lower end of the connecting rod, a detection probe is installed on the lower side of the detection plate, and a lighting lamp is installed on the lower side of the detection plate near the detection probe.

[0011] As a further embodiment of the present invention: the positioning component in S1 includes a fourth transmission motor, a lower bearing plate is provided on the upper side of the fourth transmission motor, a spring is provided on the upper side of the lower bearing plate, an upper bearing plate is provided on the upper end of the spring, a vibration motor is installed on the lower side of the upper bearing plate, a positioning plate is provided on the upper side of the upper bearing plate, lead screws are provided on both sides of the positioning plate, a slider is provided on the outer end of the lead screw, a lead screw motor is installed on the outer side of the slider at the outer end of the lead screw, a clamping plate is installed on the inner side of the slider, a fifth transmission motor is installed on the outer side of the slider corresponding to the position of the clamping plate, and an infrared probe is installed on the inner side of the clamping plate.

[0012] As a further embodiment of the present invention: in S1, the detection component is installed at one end of the upper side of the transmission box via a mounting bracket, the transmission belt is installed at the inner side of the transmission box via a first transmission motor, and the guide plate is rotated at the inner side of the transmission box via a second transmission motor.

[0013] As a further embodiment of the present invention: the output terminal of the electrical control box in S1 is electrically connected to the positioning component, the detection component, the input terminals of the first transmission motor and the second transmission motor, respectively.

[0014] As a further embodiment of the present invention: the upper end of the electric adjustable telescopic rod is hinged to the upper end of the connecting rod, the lower end of the electric adjustable telescopic rod is hinged to one end of the detection plate, the lower end of the connecting rod is hinged to the upper side of the detection plate, and the connecting rod is rotated to the inner side of the mounting frame by a third transmission motor.

[0015] As a further aspect of the present invention, the operation steps of the detection component are as follows: the electrical control box controls the lighting to illuminate the sheet metal parts fixed by the positioning component; the electrical control box controls the detection probe to run and detect the sheet metal parts, and sends the detection data to the interior of the electrical control box; the electrical control box determines the weld defect; during the detection process, the third drive motor runs and drives the detection plate to rotate through the connecting rod; the electric adjusting telescopic rod runs, the upper end of the electric adjusting telescopic rod rotates above the connecting rod, the lower end of the electric adjusting telescopic rod rotates above the detection plate, and the lower end of the connecting rod rotates above the detection plate, adjusting the angle between the detection probe and the lighting.

[0016] As a further embodiment of the present invention: the clamping plate rotates to the inner position of the slider via a fifth transmission motor, the slider slides to the outer end of the lead screw, the outer end of the lead screw slides to the inner position of the lead screw motor, the positioning component is fixed to the outer position of the transmission belt via a fourth transmission motor, the upper bearing plate is fixed to the upper position of the lower bearing plate by a spring, and the slider slides to the outer position of the lead screw via the lead screw motor.

[0017] As a further embodiment of the present invention, the operation steps of the positioning component are as follows: When the infrared probe senses the sheet metal part, the electrical control box controls the lead screw motor to run. The lead screw motor drives the slider to slide on the outside of the lead screw, and the slider pushes the clamping plate to hold the sheet metal part on the outside. The vibration motor runs and drives the sheet metal part to vibrate through the upper support plate. The upper support plate is supported on the upper side of the lower support plate by springs. Dust and debris on the outside of the sheet metal part vibrates and falls off. The fifth transmission motor runs and drives the clamping plate to rotate. The fourth transmission motor runs and drives the upper support plate to rotate, adjusting the angle of the sheet metal part. After the leak detection is completed, the lead screw motor drives the slider to slide on the outside of the lead screw, the clamping plate releases the sheet metal part, and the sheet metal part falls into the inside of the transmission box.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. The present invention provides a process for detecting missing welds in sheet metal parts. The process automatically detects missing welds in sheet metal parts through a detection component, reducing manual operation time and improving detection efficiency. The process uses a positioning component to position the sheet metal parts and adjust their position, which is highly convenient. The process also uses a guide plate to distinguish the sheet metal parts, further improving the convenience of the missing weld detection process.

[0020] 2. By vibrating the sheet metal parts through the positioning components, dust and debris on the outside of the sheet metal parts are removed, preventing dust and debris from obscuring the unwelded areas on the outside of the sheet metal parts, thus avoiding misjudgment and improving the accuracy of the inspection. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a sheet metal part leak detection device;

[0022] Figure 2 This is a schematic diagram of the detection component in a sheet metal part leak detection device;

[0023] Figure 3 This is a schematic diagram of the positioning component in a sheet metal part leak detection device.

[0024] In the diagram: 1. Transmission box; 2. Transmission belt; 3. Positioning component; 4. Mounting frame; 5. Detection component; 6. Electrical control box; 7. Receiving box; 8. Partition plate; 9. Guide plate; 10. First transmission motor; 11. Support frame; 12. Third transmission motor; 13. Connecting rod; 14. Detection plate; 15. Electric adjustable telescopic rod; 16. Detection probe; 17. Lighting lamp; 18. Fourth transmission motor; 19. Lower support plate; 20. Spring; 21. Upper support plate; 22. Vibration motor; 23. Positioning plate; 24. Lead screw; 25. Slider; 26. Lead screw motor; 27. Clamping plate; 28. Fifth transmission motor; 29. ​​Second transmission motor; 30. Infrared probe. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figures 1-3 In this embodiment of the invention, a process for detecting incomplete welds in sheet metal parts includes the following steps:

[0027] S1. Install the leak detection device: Install the transmission belt 2 inside the transmission box 1. After the first transmission motor 10 is installed, position the front side of the transmission box 1 corresponding to the position of the transmission belt 2. Fix the positioning component 3 to the outside of the transmission belt 2. Fix the mounting bracket 4 to one upper end of the transmission box 1. Install the detection component 5 inside the mounting bracket 4. Install the electrical control box 6 at the lower end of the mounting bracket 4. Fix the receiving box 7 to one side of the transmission box 1. Install the partition 8 inside the receiving box 7. Install the guide plate 9 inside the transmission box 1 near the receiving box 7. The second transmission... The drive motor 29 is installed on the lower side of the transmission box 1 at the position corresponding to the guide plate 9. The support frame 11 is fixed to the other end of the lower side of the transmission box 1. The detection component 5 is installed on the upper end of the transmission box 1 through the mounting frame 4. The transmission belt 2 is installed on the inner side of the transmission box 1 through the first drive motor 10. The guide plate 9 rotates on the inner side of the transmission box 1 through the second drive motor 29. The output end of the electrical control box 6 is electrically connected to the positioning component 3, the detection component 5, the first drive motor 10 and the second drive motor 29 respectively.

[0028] S2. Sheet metal part positioning process: Take out the sheet metal parts to be inspected, sort out the easily distinguishable sheet metal parts with missing welds, place the sheet metal parts that cannot be distinguished by the naked eye on the upper side of the positioning component 3, fix the sheet metal parts, and the positioning component 3 moves to drive the sheet metal parts to vibrate, removing dust and debris from the outer surface of the sheet metal parts.

[0029] S3, Welding Leakage Detection: The first drive motor 10 drives the drive belt 2 to rotate, and the drive belt 2 drives the positioning component 3 to move. When the positioning component 3 moves to the lower position of the detection component 5, the detection component 5 runs to detect welding leakage on the sheet metal part. During the detection process, the positioning component 3 adjusts the angle of the sheet metal part, and the detection component 5 transmits the detection data to the inside of the electrical control box 6. The electrical control box 6 processes the detection data and determines the welding leakage situation.

[0030] S4. Sheet metal parts classification and export: When a missing weld occurs, the second drive motor 29 drives the guide plate 9 to rotate and adjust the angle of the guide plate 9. The electrical control box 6 controls the positioning component 3 to release the sheet metal parts. The sheet metal parts are guided by the guide plate 9 to guide the material into the corresponding separation area of ​​the internal partition 8 of the receiving box 7. When no missing weld occurs, the second drive motor 29 drives the guide plate 9 to rotate and adjust the angle of the guide plate 9. The electrical control box 6 controls the positioning component 3 to release the sheet metal parts. The sheet metal parts are guided by the guide plate 9 to guide the material into the corresponding separation area of ​​the internal partition 8 of the receiving box 7.

[0031] exist Figure 1 , 2In the middle section: the detection component 5 includes a third drive motor 12, a connecting rod 13 is provided on the lower side of the third drive motor 12, an electrically adjustable telescopic rod 15 is provided on one side of the connecting rod 13, a detection plate 14 is provided at the lower end of the connecting rod 13, a detection probe 16 is installed on the lower side of the detection plate 14, and a lighting lamp 17 is installed on the lower side of the detection plate 14 near the detection probe 16. The upper end of the electrically adjustable telescopic rod 15 is hinged to the upper end of the connecting rod 13, and the lower end of the electrically adjustable telescopic rod 15 is hinged to one end of the detection plate 14. The lower end of the connecting rod 13 is hinged to the upper side of the detection plate 14. The connecting rod 13 rotates within the mounting frame 4 via the third drive motor 12. At the side position, the operation steps of the detection component 5 are as follows: the electrical control box 6 controls the lighting lamp 17 to illuminate the sheet metal parts fixed by the positioning component 3, the electrical control box 6 controls the detection probe 16 to run and detect the sheet metal parts, and sends the detection data to the inside of the electrical control box 6. The electrical control box 6 determines the welding failure. During the detection process, the third drive motor 12 runs and drives the detection plate 14 to rotate through the connecting rod 13. The electric adjusting telescopic rod 15 runs. The upper end of the electric adjusting telescopic rod 15 rotates on the upper end of the connecting rod 13, the lower end of the electric adjusting telescopic rod 15 rotates on the upper side of the detection plate 14, and the lower end of the connecting rod 13 rotates on the upper side of the detection plate 14, adjusting the angle between the detection probe 16 and the lighting lamp 17.

[0032] exist Figure 1 , 3In the middle: the positioning component 3 includes a fourth drive motor 18, a lower bearing plate 19 is provided on the upper side of the fourth drive motor 18, a spring 20 is provided on the upper side of the lower bearing plate 19, an upper bearing plate 21 is provided on the upper end of the spring 20, a vibration motor 22 is installed on the lower side of the upper bearing plate 21, a positioning plate 23 is provided on the upper side of the upper bearing plate 21, and lead screws 24 are provided on both sides of the positioning plate 23. A slider 25 is provided on the outer end of the lead screw 24, and the outer side of the slider 25 is located at the outer end of the lead screw 24. A lead screw motor 26 is installed at the position. A clamping plate 27 is installed on the inner side of the slider 25. A fifth transmission motor 28 is installed on the outer side of the slider 25 corresponding to the position of the clamping plate 27. An infrared probe 30 is installed on the inner side of the clamping plate 27. The clamping plate 27 rotates to the inner position of the slider 25 via the fifth transmission motor 28. The slider 25 slides to the outer end of the lead screw 24. The outer end of the lead screw 24 slides to the inner position of the lead screw motor 26. The positioning component 3 is fixed to the outer position of the transmission belt 2 via the fourth transmission motor 18. The upper bearing plate 21 is fixed to the upper position of the lower bearing plate 19 via the spring 20. The slider 25 slides to the outer position of the lead screw 24 via the lead screw motor 26. The operation steps of the positioning component 3 are as follows: When the infrared probe 30 senses the sheet metal part, the electrical control box 6 controls the lead screw motor 26 to run. The lead screw motor 26 drives the slider 25 to slide on the outer side of the lead screw 24. The slider 25 pushes the clamping plate 27 to clamp the outer side of the sheet metal part. The vibration motor 28... 2. The upper support plate 21 drives the sheet metal part to vibrate. The upper support plate 21 is supported on the upper side of the lower support plate 19 by the spring 20. The dust and debris on the outside of the sheet metal part are vibrated and fall off. The fifth transmission motor 28 drives the clamping plate 27 to rotate. The fourth transmission motor 18 drives the upper support plate 21 to rotate. The angle of the sheet metal part is adjusted. After the missing weld detection is completed, the lead screw motor 26 drives the slider 25 to slide on the outer end of the lead screw 24. The clamping plate 27 releases the sheet metal part, and the sheet metal part falls into the inside of the transmission box 1.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A process for detecting missed welds in sheet metal parts, characterized in that, The steps are as follows: S1. Install the leak detection device: Install the transmission belt (2) inside the transmission box (1), install the first transmission motor (10) at the position of the front side of the transmission box (1) corresponding to the position of the transmission belt (2), fix the positioning component (3) to the outside of the transmission belt (2), fix the mounting bracket (4) to one end of the upper side of the transmission box (1), install the detection component (5) inside the mounting bracket (4), install the electrical control box (6) at the lower end of the mounting bracket (4), fix the receiving box (7) to one side of the transmission box (1), install the partition (8) inside the receiving box (7), install the guide plate (9) inside the transmission box (1) near the position of the receiving box (7), install the second transmission motor (29) at the position of the lower side of the transmission box (1) corresponding to the position of the guide plate (9), and fix the support frame (11) at the other end of the lower side of the transmission box (1). S2, Sheet metal part positioning process: Take out the sheet metal parts to be inspected, sort out the easily distinguishable sheet metal parts with missing welds, place the sheet metal parts that cannot be distinguished by the naked eye on the upper side of the positioning component (3), fix the sheet metal parts, and the positioning component (3) runs to drive the sheet metal parts to vibrate and remove the dust from the outer surface of the sheet metal parts. S3, Welding Detection: The first drive motor (10) runs and drives the drive belt (2) to rotate. The drive belt (2) drives the positioning component (3) to move. When the positioning component (3) moves to the lower position of the detection component (5), the detection component (5) runs to detect the welding of the sheet metal part. During the detection process, the positioning component (3) adjusts the angle of the sheet metal part. The detection component (5) transmits the detection data to the inside of the electrical control box (6). The electrical control box (6) processes the detection data and determines the welding situation. S4. Sheet metal parts classification and export: When there is a missing weld, the second drive motor (29) runs and drives the guide plate (9) to rotate and adjust the angle of the guide plate (9). The electrical control box (6) controls the positioning component (3) to release the sheet metal parts. The sheet metal parts are guided by the guide plate (9) to allow the material to enter the corresponding separation area of ​​the internal partition (8) of the receiving box (7). When there is no missing weld, the second drive motor (29) runs and drives the guide plate (9) to rotate and adjust the angle of the guide plate (9). The electrical control box (6) controls the positioning component (3) to release the sheet metal parts. The sheet metal parts are guided by the guide plate (9) to allow the material to enter the corresponding separation area of ​​the internal partition (8) of the receiving box (7). The detection component (5) in S1 includes a third drive motor (12), a connecting rod (13) is provided on the lower side of the third drive motor (12), an electric adjusting telescopic rod (15) is provided on one side of the connecting rod (13), a detection plate (14) is provided at the lower end of the connecting rod (13), a detection probe (16) is installed on the lower side of the detection plate (14), and a lighting lamp (17) is installed on the lower side of the detection plate (14) near the detection probe (16). The positioning component (3) in S1 includes a fourth drive motor (18). A lower bearing plate (19) is provided on the upper side of the fourth drive motor (18). A spring (20) is provided on the upper side of the lower bearing plate (19). An upper bearing plate (21) is provided on the upper end of the spring (20). A vibration motor (22) is installed on the lower side of the upper bearing plate (21). A positioning plate (23) is provided on the upper side of the upper bearing plate (21). A lead screw (24) is provided on both sides of the positioning plate (23). A slider (25) is provided on the outer end of the lead screw (24). A lead screw motor (26) is installed on the outer side of the slider (25) at the outer end of the lead screw (24). A clamping plate (27) is installed on the inner side of the slider (25). A fifth drive motor (28) is installed on the outer side of the slider (25) at the position corresponding to the clamping plate (27). An infrared probe (30) is installed on the inner side of the clamping plate (27). The operation steps of the positioning component (3) are as follows: When the infrared probe (30) senses the sheet metal part, the electrical control box (6) controls the screw motor (26) to run. The screw motor (26) drives the slider (25) to slide on the outside of the screw (24). The slider (25) pushes the clamping plate (27) to clamp the outside of the sheet metal part. The vibration motor (22) runs and drives the sheet metal part to vibrate through the upper bearing plate (21). The upper bearing plate (21) is supported on the upper side of the lower bearing plate (19) by the spring (20). The dust on the outside of the sheet metal part vibrates and falls off. The fifth transmission motor (28) runs and drives the clamping plate (27) to rotate. The fourth transmission motor (18) runs and drives the upper bearing plate (21) to rotate. The angle of the sheet metal part is adjusted. After the leak detection is completed, the screw motor (26) drives the slider (25) to slide on the outside of the screw (24). The clamping plate (27) releases the sheet metal part and the sheet metal part falls into the transmission box (1).

2. The process for detection of missed welds in sheet metal parts as claimed in claim 1 wherein, In S1, the detection component (5) is installed at one end of the upper side of the transmission box (1) via the mounting bracket (4), the transmission belt (2) is installed at the inner side of the transmission box (1) via the first transmission motor (10), and the guide plate (9) rotates at the inner side of the transmission box (1) via the second transmission motor (29).

3. The process for detection of missed welds in sheet metal parts as claimed in claim 1 wherein, The output terminal of the electrical control box (6) in S1 is electrically connected to the input terminals of the positioning component (3), the detection component (5), the first drive motor (10), and the second drive motor (29), respectively.

4. The process for detection of missed welds in sheet metal parts as claimed in claim 1 wherein, The upper end of the electric adjustable telescopic rod (15) is hinged to the upper end of the connecting rod (13), the lower end of the electric adjustable telescopic rod (15) is hinged to one end of the detection plate (14), the lower end of the connecting rod (13) is hinged to the upper side of the detection plate (14), and the connecting rod (13) is rotated to the inner side of the mounting frame (4) by the third transmission motor (12).

5. The process for detection of missed welds in sheet metal parts as claimed in claim 1 wherein, The operation steps of the detection component (5) are as follows: the electrical control box (6) controls the lighting lamp (17) to illuminate the sheet metal parts fixed by the positioning component (3), the electrical control box (6) controls the detection probe (16) to run and detect the sheet metal parts, and sends the detection data to the inside of the electrical control box (6). The electrical control box (6) determines the welding failure. During the detection process, the third drive motor (12) runs and drives the detection plate (14) to rotate through the connecting rod (13). The electric adjustment telescopic rod (15) runs. The upper end of the electric adjustment telescopic rod (15) rotates on the upper end of the connecting rod (13), the lower end of the electric adjustment telescopic rod (15) rotates on the upper side of the detection plate (14), and the lower end of the connecting rod (13) rotates on the upper side of the detection plate (14), adjusting the angle between the detection probe (16) and the lighting lamp (17).

6. The process for detection of missed welds in sheet metal parts as claimed in claim 1 wherein, The clamping plate (27) is rotated to the inner position of the slider (25) by the fifth transmission motor (28), the slider (25) slides to the outer end of the lead screw (24), the outer end of the lead screw (24) slides to the inner position of the lead screw motor (26), the positioning component (3) is fixed to the outer position of the transmission belt (2) by the fourth transmission motor (18), the upper bearing plate (21) is fixed to the upper position of the lower bearing plate (19) by the spring (20), and the slider (25) slides to the outer position of the lead screw (24) by the lead screw motor (26).

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