An automatic assembly line and intelligent assembly method for automobile seat slide rail screws

Abstract

The present invention provides an automated assembly line and intelligent assembly method for automotive seat slide rail screws. A slide rail assembly conveyor track is located directly above the screw assembly conveyor track. A screw lifting mechanism is provided directly above the screw assembly conveyor track. When the slide rail assembly and screw assembly are simultaneously within the working area, a gripping portion of the screw lifting mechanism is controlled to grip the top of the screw assembly and lift it to a target position. The assembly method comprises the following steps: moving the gripping portion at the lower portion of the telescopic rod of the cylinder to a set position; filling an airbag with a preset amount of air so that the cylindrical concave portion formed in the airbag grips the top of the screw assembly; and finally, an electromagnet attracts the top of the screw and lifts the screw assembly to the target position. This invention can significantly improve the assembly efficiency of automotive seat slide rail screw assemblies.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent manufacturing of automobile seats, and in particular to an automatic assembly line and an intelligent assembly method for automobile seat slide rails and screw rods. Background Art

[0002] Most existing automotive seat rail manufacturers rely on manual installation of the rail screw assembly. This process involves assembling the inner and outer rails. After testing the sliding performance of the inner and outer rails, the operator inserts the rail screw assembly through the inner cavity of the inner rail and the through-hole of the screw guide plate. The operator then positions one end of the screw using an external positioning plate before installing a stop nut. The major drawback of this method is its low assembly efficiency and the high risk of the screw end striking the screw guide plate, making it difficult to insert the screw smoothly into the through-hole.

[0003] With the development of intelligent equipment, Wuhan Zhongshe Robot Technology Co., Ltd. has developed an automatic installation machine for car seat slide rails and screws. The cam is fixedly mounted on the top of the rotary table, and the rollers of the plurality of fixed pulleys are close to the bottom of the rotary table. A clamping cylinder is provided at the top of the rotary table base and at both ends of each clamping tool. During use, the guide rail screw workpiece is manually placed in the lower positioning block of the loading plate for positioning, the loading plate is moved to the bottom of the press plate by the rodless cylinder, the loading plate and the screw workpiece are lifted up by the double guide rod cylinder, the guide rail screw is attracted by the magnet at the bottom of the press plate and positioned by the upper positioning block, the lower guide rail is rotated into place by the dividing plate, and the guide rail screw is pressed tightly against the lower guide rail and clamped into the slot by the pressure given by the servo electric cylinder.

[0004] Although the aforementioned automatic installation machine for automobile seat slide rail screws can realize the automatic installation of slide rail screws, it must adopt a technical route of first assembling the slide rail screws, then assembling the inner slide rail (and upper guide rail), and then testing the sliding performance. This is not suitable for most existing automobile seat slide rail manufacturers because it involves almost changing the entire automobile seat slide rail production line, and the facility investment cost is relatively high.

[0005] Furthermore, the guide screw is pressed against the lower guide rail and locked into the slot during use, making it suitable only for car seat slides without a guide plate at the end of the guide screw. For car seat slides with a guide plate, the screw must be inserted through a through-hole in the guide plate. This through-hole is typically only 20mm in diameter and only 5±1mm larger than the outer diameter of the screw. Currently, inserting the screw into the through-hole in the guide plate is difficult, whether manually or with the help of existing automated equipment that clamps the screw horizontally. Summary of the Invention

[0006] The purpose of the present invention is to provide an automatic assembly line and intelligent assembly method for automobile seat slide rail screw rods, which can at least greatly improve the assembly efficiency of automobile seat slide rail screw rod assemblies without changing the conventional technical route and the entire automobile seat slide rail production line, and can smoothly insert the screw rod into the through hole of the screw rod guide plate.

[0007] The present invention adopts the following technical solutions.

[0008] An automatic assembly line for automobile seat slide rails and screw rods includes a control system, a slide rail assembly conveying track, and a screw rod assembly conveying track. The slide rail assembly conveying track is located directly above the screw rod assembly conveying track, and a screw rod lifting mechanism is provided directly above the screw rod assembly conveying track. The control system connects and controls the slide rail assembly conveying track, the screw rod assembly conveying track, and the screw rod lifting mechanism to operate according to a set program. When the slide rail assembly and the screw rod assembly are simultaneously located in a working area, the gripping portion of the screw rod lifting mechanism is controlled to grip the top of the screw rod assembly and lift it to a target position.

[0009] In the present invention, when the slide rail assembly and the screw assembly are simultaneously located in the working area, the center of the screw guide plate on the slide rail assembly coincides with the axis of the screw assembly and coincides with the axis of the lifting rod of the screw lifting mechanism.

[0010] In order to assemble the car seat slide screw more smoothly, the screw assembly conveying track includes a conveying track and a limit seat arranged on the conveying track. The screw assembly is arranged vertically on the limit seat, and the screw assembly is inserted into the hole on the limit seat.

[0011] In the present invention, the slide rail assembly conveying track includes an annular track, on which a follower clamp is provided. The follower clamp is used for clamping the vertically arranged slide rail assembly and moving the slide rail assembly.

[0012] In order to assemble the car seat slide rail screw more smoothly and stably, the screw lifting mechanism includes a vertically arranged cylinder, and the lower part of the telescopic rod of the cylinder is connected to the grasping part; the grasping part includes an airbag, and the airbag is externally connected to the compressed air supply system. After inflation, a cylindrical recess is formed on the airbag, and the depth of the cylindrical recess is not less than 30 mm. The cylindrical recess can hold the screw of the screw assembly tightly.

[0013] Furthermore, an electromagnet is installed inside the airbag and fixedly connected to the lower end of the telescopic rod of the cylinder. The diameter of the electromagnet is smaller than the outer diameter of the screw of the screw assembly. This solution adopts the technical route of vertical assembly of the screw assembly, which can effectively prevent the screw assembly from colliding with the screw guide plate.

[0014] Furthermore, a screw lifting mechanism is installed on the first horizontal moving mechanism, and an automatic nut tightening mechanism is also provided above the working area; a push rod is also provided under the conveying track of the slide rail assembly, and the push rod is connected to the telescopic rod of the electric telescopic device. When the telescopic rod of the electric telescopic device is extended, the push rod can support the bottom end of the screw assembly in the slide rail assembly.

[0015] An intelligent assembly method using the aforementioned automatic assembly line for automobile seat slide rails and screws, comprising the following steps:

[0016] Step 1: Control the slide rail assembly conveying track and the screw assembly conveying track to run synchronously. When the slide rail assembly and the screw assembly are located in the working area at the same time, control the slide rail assembly conveying track and the screw assembly conveying track to pause.

[0017] Step 2: Control the cylinder to move the gripping portion at the lower portion of the telescopic rod to a set position. At this point, the electromagnet at the lower end of the telescopic rod just contacts the top end of the screw rod of the screw rod assembly.

[0018] Step 3: Control the valve of the compressed air supply system to open, and fill the airbag with a preset amount of air so that the cylindrical concave portion formed on the airbag tightly holds the top of the screw of the screw assembly;

[0019] Step 4: Control the electromagnet to be energized so that the electromagnet attracts the top of the screw rod;

[0020] Step 5: Control the cylinder to retract the telescopic rod and lift the screw assembly to the target position;

[0021] Step 6: Control the screw lifting mechanism and the slide rail assembly conveyor track to move synchronously to the nut assembly station, then control the electric telescoping device to work so that the push rod supports the bottom end of the screw assembly in the slide rail assembly, then control the electromagnet to cut off power, control the airbag to exhaust, and then control the screw lifting mechanism to reset;

[0022] Step 7: Control the automatic nut tightening mechanism to assemble the limit nut on the top of the screw, then control the electric retractor to reset, and then control the slide rail assembly conveyor track to move the slide rail assembly with the screw assembly installed to the unloading station;

[0023] Step 8: Repeat steps 1 to 8 to assemble the subsequent screw rod assembly.

[0024] In order to more stably lift the screw assembly to the assembly position, the inner wall of the cylindrical concave portion formed on the airbag is provided with anti-slip protrusions.

[0025] As a preferred solution, the wall thickness of the inflated airbag is not less than 0.5 mm.

[0026] As a more preferred embodiment, the radial expansion of the airbag after inflation relative to that before inflation does not exceed 6 mm, and the axial expansion of the airbag after inflation relative to that before inflation is not less than 15 mm.

[0027] Beneficial effects: By adopting the solution of the present invention, without changing the conventional technical route and the existing entire automobile seat slide rail production line, not only can the assembly efficiency of the automobile seat slide rail screw assembly be greatly improved, but the screw rod can also be smoothly inserted into the through hole of the screw rod guide plate; taking the single-seat automobile front seat slide rail assembly as an example (the screw rod assembly in the slide rail assembly is 640mm long, the screw rod outer diameter is 15mm, and the through hole diameter of the screw rod guide plate is 20mm), it only takes an average of about twenty seconds to successfully assemble the screw rod assembly and its limit nut.

[0028] The technical route adopted by the present invention is completely different from the assembly technical route of the existing technology (the automatic installation machine for automobile seat slide rail screws in the background technology), and overcomes two major technical difficulties: one is to realize that the screw assembly with a length of hundreds of millimeters is directly inserted into the inner cavity of the inner slide rail of the slide rail assembly and directly through the hole (the upper end of the screw rod passes through the hole of the screw rod guide plate); the second is to use the airbag with a specific structure and operation method to cleverly grasp the top of the screw rod and adaptively align and lift it axially, thereby avoiding the upper end of the screw rod from hitting the screw rod guide plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 3D schematic diagram of an automatic assembly line for automobile seat slide rails and screw rods in an embodiment;

[0030] Figure 2 Schematic diagram of the main direction of the automatic assembly line for automobile seat slide rail screws in the embodiment;

[0031] Figure 3 AA direction schematic diagram of the automatic assembly line for automobile seat slide rail screws in the embodiment;

[0032] Figure 4 It is a partial three-dimensional schematic diagram of grasping the top of the screw rod assembly using the automatic assembly line for automobile seat slide rail screw rods in the embodiment;

[0033] Figure 5 A partial cross-sectional schematic diagram of grabbing the top of a screw rod assembly using an automatic assembly line for a car seat slide rail screw rod in an embodiment;

[0034] Figure 6 for Figure 5Enlarged view of part B in the middle (before grabbing the top of the screw assembly);

[0035] Figure 7 for Figure 5 Enlarged view of part B in the middle (when grabbing the top of the screw assembly);

[0036] Figure 8 It is a partial three-dimensional schematic diagram of supporting the bottom of the screw rod assembly by using the automatic assembly line of the automobile seat slide rail screw rod in the embodiment;

[0037] Figure 9 This is a side view of supporting the bottom of the screw rod assembly using the automatic assembly line for the car seat slide rail screw rod in the embodiment;

[0038] Figure 10 This is a cross-sectional schematic diagram of supporting the bottom of the screw rod assembly using the automatic assembly line for the automobile seat slide rail screw rod in the embodiment;

[0039] Figure 11 for Figure 10 Enlarged view of the D part in the middle;

[0040] Figure 12 A three-dimensional schematic diagram of assembling a limit nut using an automatic assembly line for a car seat slide rail screw in an embodiment;

[0041] Figure 13 A cross-sectional schematic diagram of assembling a limit nut using an automatic assembly line for a car seat slide rail screw in an embodiment;

[0042] Figure 14 Schematic diagram of the completion of the assembly of the screw rod assembly using the automatic assembly line for automobile seat slide rail screw rods in the embodiment;

[0043] Figure 15 for Figure 14 Enlarged view of part C in the middle. DETAILED DESCRIPTION

[0044] The technical solutions of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In the present invention, the commercially available products provided by the corresponding manufacturers of the screw rod assembly include a screw rod and a motor and a movable seat assembled on the screw rod; the slide rail assembly is a conventional product, including an inner slide rail and an outer slide rail, and the inner cavity of the inner slide rail accommodates the screw rod assembly. Example

[0045] like Figures 1 to 15As shown, an automatic assembly line for automobile seat slide rails and screws includes a control system, a slide rail assembly conveying track 3 and a screw assembly conveying track 2 disposed on a bracket 1, the slide rail assembly conveying track 3 being located directly above the screw assembly conveying track 2, and a screw lifting mechanism 5 being disposed directly above the screw assembly conveying track 2; the control system connects and controls the slide rail assembly conveying track 3, the screw assembly conveying track 2, and the screw lifting mechanism 5 to operate according to a set program; when the slide rail assembly 10 and the screw assembly 11 are simultaneously located in the working area, the gripping portion 4 of the screw lifting mechanism 5 is controlled to grip the top of the screw assembly 11 and lift it to the target position. When the slide rail assembly 10 and the screw assembly 11 are simultaneously located in the working area, the center of the screw guide plate 12 on the slide rail assembly 10 coincides with the axis of the screw assembly 11 and also coincides with the axis of the lifting rod 56 of the screw lifting mechanism 5.

[0046] In this embodiment, the screw assembly conveying track 2 includes a conveying track (using a circular conveying track) and a limit seat 22 arranged on the conveying track. The screw assembly 11 is arranged vertically on the limit seat 22, and the screw assembly 11 is inserted into the hole on the limit seat 22. The limit seat 22 is installed on the follower clamp of the conveying track. The depth of the hole on the limit seat 22 is 1 / 3 to 1 / 2 of the length of the screw assembly 11. The hole can allow the screw assembly 11 to be flexibly inserted and removed. The slide rail assembly conveying track 3 includes an annular track. A follower clamp 31 is provided on the annular track. The follower clamp 31 is used to clamp the vertically arranged slide rail assembly 10 and move the slide rail assembly 10. The conveying track and the annular track have the same specifications, and the same number of follower clamps are installed on the two tracks.

[0047] In this embodiment, combined with Figure 3 As shown, the screw lifting mechanism 5 includes a vertically arranged cylinder 50, the lower part of the telescopic rod of the cylinder 50 is connected to the grasping part 4; Figure 6 and Figure 7As shown, the gripping portion 4 includes an airbag 51 mounted on a rigid air tube 55. The upper end of the rigid air tube 55 is connected to the lower end of the telescopic rod of the air cylinder 50. The rigid air tube 55 has an air flow channel 54, which is connected to an external compressed air supply system. When inflated, the airbag 51 forms a cylindrical inner recess 52 with a depth of 40 mm. This cylindrical inner recess 52 can firmly grasp the screw 13 of the screw assembly 11. An electromagnet 53 is disposed within the airbag 51 and is fixedly connected to the lower end of the telescopic rod of the air cylinder 50. The diameter of the electromagnet 53 is smaller than the outer diameter of the screw 13 of the screw assembly 11. During use, the wall thickness of the inflated airbag 51 is not less than 0.5 mm, the radial expansion of the inflated airbag 51 does not exceed 6 mm, and the axial expansion of the inflated airbag 51 is not less than 15 mm. This specific airbag structure enables adaptive centering (aligning the screw 13 with the telescopic rod of the cylinder 50), facilitating secure grip and smooth lifting of the screw assembly 11. In another embodiment, the inner wall of the cylindrical recess 52 formed on the airbag 51 is provided with anti-slip grooves. These anti-slip grooves help increase the friction between the inner wall of the cylindrical recess 52 and the screw 13, facilitating a more stable lifting of the screw assembly to the assembly position.

[0048] In this embodiment, an automatic nut tightening mechanism 8 is also provided above the work area. The automatic nut tightening mechanism 8 is mounted on the bracket 1. The automatic nut tightening mechanism 8 includes a three-dimensional movement mechanism and an automatic nut tightening machine mounted on the three-dimensional movement mechanism. During use, the automatic nut tightening machine is first controlled by the three-dimensional movement mechanism to move to the material removal position to remove the material (limit the nut), and then the automatic nut tightening machine is controlled to move to the assembly position to automatically tighten the limit nut. A push rod 6 is also provided below the slide rail assembly conveyor track 3. The push rod 6 is connected to the telescopic rod of the electric telescopic device 7. The electric telescopic device 7 is mounted on the end of the telescopic rod of the horizontal cylinder 9. When the telescopic rod of the electric telescopic device 7 is extended upward, the push rod 6 can support the bottom end of the screw assembly 11 in the slide rail assembly 10.

[0049] The screw assembly 11 in a certain model of slide rail assembly is 640 mm long, the screw outer diameter is 15 mm, and the through hole diameter of the screw guide plate is 20 mm. The screw guide plate is pre-installed on the slide rail assembly. Now, the screw assembly 11 needs to be installed in the inner cavity of the inner slide rail, and the limit nut 14 needs to be screwed onto the top of the screw 13 of the screw assembly 11. An intelligent assembly method using the automatic assembly line for automotive seat slide rail screws of this embodiment includes the following steps:

[0050] Step 1, control the slide rail assembly conveying track 3 and the screw assembly conveying track 2 to run synchronously. When the slide rail assembly 10 and the screw assembly 11 are both in the working area, control the slide rail assembly conveying track 3 and the screw assembly conveying track 2 to pause. The state at this time refers to Figures 1 to 3 As shown;

[0051] Step 2, control the cylinder 50 to work, so that the grabbing part 4 at the lower part of the telescopic rod of the cylinder 50 moves to the set position. At this time, the electromagnet 53 at the lower end of the telescopic rod is just close to the top of the screw rod 13 of the screw rod assembly 11. The state at this time is as follows: Figure 4 、 Figure 5 and Figure 6 As shown;

[0052] Step 3: Control the valve of the compressed air supply system to open and fill the airbag 51 with a preset amount of air, so that the cylindrical concave portion 52 formed on the airbag 51 tightly embraces the top of the screw 13 of the screw assembly 11, and the airbag 51 expands axially.

[0053] Step 4, control the electromagnet 53 to be energized, so that the electromagnet 53 attracts the top of the screw rod, and the state at this time is also as follows Figure 7 As shown;

[0054] Step 5: Control the cylinder 50 to retract the telescopic rod of the cylinder 50 and lift the screw assembly 11 to the target position;

[0055] Step 6, control the electric telescopic device 7 to work, so that the top rod 6 presses against the bottom end of the screw assembly 11 in the slide rail assembly 10, then control the electromagnet 53 to cut off the power, and control the air bag 51 to exhaust, and then control the screw lifting mechanism 5 to reset. Figures 8 to 11 As shown;

[0056] Step 7, control the automatic nut tightening mechanism 8 to work, and assemble the limit nut 14 on the top of the screw rod 13. The state at this time is as follows: Figure 12 and Figure 13 Then control the electric expansion joint 7 to reset (the state is as shown Figure 14 As shown), the limit nut 14 is assembled on the top of the screw rod 13 and is located above the screw rod guide plate 12 (the state at this time is as shown in FIG. Figure 15 As shown), then control the slide rail assembly conveyor track 3 to operate, so that the slide rail assembly 10 equipped with the screw assembly 11 moves to the unloading station;

[0057] Step 8: Repeat steps 1 to 8 to assemble the slide rail assembly and screw assembly that are subsequently moved to the working area.

[0058] During assembly, due to the length of the screw assembly, if it is assembled horizontally, the front end of the screw of the screw assembly is likely to deviate downward, making it difficult to insert into the hole of the screw guide plate 12. If it is assembled vertically, the screw of the screw assembly is likely to deviate and also difficult to insert into the hole of the screw guide plate 12. In this solution, a specially structured airbag 51 is first used to encase the front end of the screw. The airbag 51 is then inflated to align the screw 13 with the telescopic rod of the cylinder 50. The electromagnet 53 is then energized to attract the end of the screw 13. Finally, the screw lifting mechanism 5 is used to lift the screw assembly and allow the screw 13 to pass through the hole of the screw guide plate 12.

[0059] By adopting the solution in the embodiment, without changing the conventional technical route and the existing entire automobile seat slide rail production line, not only can the assembly efficiency of the automobile seat slide rail screw assembly be greatly improved, but the screw rod can also be smoothly inserted into the through hole of the screw rod guide plate; taking the single-seat automobile front seat slide rail assembly as an example, it only takes an average of about twenty seconds to successfully assemble the screw rod assembly and its limit nut.

[0060] The technical route adopted by this solution is completely different from the assembly technology route of the existing technology (the automatic installation machine for automobile seat slide rail screws in the background technology), and overcomes two major technical difficulties: one is to realize that the screw assembly with a length of hundreds of millimeters is directly inserted into the inner cavity of the inner slide rail of the slide rail assembly and directly through the hole (the upper end of the screw rod passes through the hole of the screw rod guide plate); the second is to use the airbag with a specific structure and operation method to cleverly grasp the top of the screw rod and adaptively align and lift it axially, thereby avoiding the upper end of the screw rod from hitting the screw rod guide plate.

Claims

1. An automatic assembly line for automobile seat rail screws, including a control system, characterized by: The invention also includes a slide rail assembly conveying track (3) and a screw assembly conveying track (2) arranged on the bracket (1), the slide rail assembly conveying track (3) is located directly above the screw assembly conveying track (2), and a screw lifting mechanism (5) is arranged directly above the screw assembly conveying track (2); the control system connects and controls the slide rail assembly conveying track (3), the screw assembly conveying track (2) and the screw lifting mechanism (5) to operate according to a set program; when the slide rail assembly (10) and the screw assembly (11) are simultaneously located in the working area, the gripping portion (4) of the screw lifting mechanism (5) is controlled to grip the top of the screw assembly (11) and lift it to a target position; an automatic nut tightening mechanism (8) is also arranged above the working area; a push rod (6) is also arranged below the slide rail assembly conveying track (3), the push rod (6) is connected to the telescopic rod of the electric telescopic device (7), and when the telescopic rod of the electric telescopic device (7) is extended, the push rod (6) can support the bottom end of the screw assembly (11) in the slide rail assembly (10).

2. The automatic assembly line for automobile seat slide rail screws according to claim 1 is characterized in that: When the slide rail assembly (10) and the screw assembly (11) are simultaneously located in the working area, the center of the screw guide plate (12) on the slide rail assembly (10) coincides with the axis of the screw assembly (11) and coincides with the axis of the lifting rod (56) of the screw lifting mechanism (5).

3. The automatic assembly line for automobile seat slide rail screws according to claim 1 is characterized in that: The screw assembly conveying track (2) comprises a conveying track and a limiting seat (22) arranged on the conveying track, the screw assembly (11) is vertically arranged on the limiting seat (22), and the screw assembly (11) is inserted into a hole on the limiting seat (22).

4. The automatic assembly line for automobile seat slide rail screws according to claim 3 is characterized in that: The slide rail assembly conveying track (3) comprises an annular track, on which a follower clamp (31) is arranged. The follower clamp (31) is used to clamp the vertically arranged slide rail assembly (10) and move with the slide rail assembly (10).

5. The automatic assembly line for automobile seat slide rail screws according to any one of claims 1 to 4, characterized in that: The screw lifting mechanism (5) includes a vertically arranged cylinder (50), the lower part of the telescopic rod of the cylinder (50) is connected to the grasping part (4); the grasping part (4) includes an air bag (51), the air bag (51) is externally connected to a compressed air supply system, and a cylindrical inner concave portion (52) is formed on the inflated air bag (51), the depth of the cylindrical inner concave portion (52) is not less than 30 mm, and the cylindrical inner concave portion (52) can hold the screw (13) of the screw assembly (11) tightly.

6. The automatic assembly line for automobile seat slide rail screws according to claim 5, characterized in that: An electromagnet (53) is provided in the airbag (51), and the electromagnet (53) is fixedly connected to the lower end of the telescopic rod of the cylinder (50). The diameter of the electromagnet (53) is smaller than the outer diameter of the screw rod (13) of the screw rod assembly (11).

7. An intelligent assembly method using the automatic assembly line for automobile seat rail screws according to claim 6, characterized in that the steps include: Step 1, controlling the slide rail assembly conveying track (3) and the screw assembly conveying track (2) to operate synchronously, and when the slide rail assembly (10) and the screw assembly (11) are simultaneously located in the working area, controlling the slide rail assembly conveying track (3) and the screw assembly conveying track (2) to pause; Step 2, controlling the cylinder (50) to operate so that the gripping portion (4) at the lower portion of the telescopic rod of the cylinder (50) moves to a set position, at which point the electromagnet (53) at the lower end of the telescopic rod just contacts the top end of the screw (13) of the screw assembly (11); Step 3, controlling the valve of the compressed air supply system to open, and filling a preset amount of air into the airbag (51), so that the cylindrical concave portion (52) formed on the airbag (51) tightly holds the top of the screw (13) of the screw assembly (11); Step 4, controlling the electromagnet (53) to be energized so that the electromagnet (53) attracts the top end of the screw rod; Step 5, controlling the cylinder (50) to operate, causing the telescopic rod of the cylinder (50) to retract, and lifting the screw assembly (11) to the target position; Step 6, controlling the electric telescopic device (7) to work, so that the push rod (6) presses against the bottom end of the lead screw assembly (11) in the slide rail assembly (10), then controlling the electromagnet (53) to be powered off, and at the same time controlling the air bag (51) to be exhausted, and then controlling the lead screw lifting mechanism (5) to be reset; Step 7, control the automatic nut tightening mechanism (8) to work, assemble the limit nut (14) on the top of the screw rod (13), then control the electric telescopic device (7) to reset, and then control the slide rail assembly conveying track (3) to operate, so that the slide rail assembly (10) with the screw rod assembly (11) installed is moved to the unloading station; Step 8: Repeat steps 1 to 8 to assemble the subsequent screw rod assembly.

8. The intelligent assembly method according to claim 7, characterized in that: The inner wall of the cylindrical concave portion (52) formed on the airbag (51) is provided with anti-slip patterns.

9. The intelligent assembly method according to claim 7, characterized in that: The wall thickness of the inflated airbag (51) is not less than 0.5 mm.

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