Steering wheel part welding device and welding process thereof

Abstract

The application discloses a steering wheel part welding device and a welding process thereof, and relates to the technical field of air bag generator welding. The steering wheel part welding device comprises a rotary driving part, a pre-stress fitting part is installed on the rotary driving part, and the pre-stress fitting part is used for applying pre-stress to an air bag generator upper cover; a pressure supply device is installed on the pre-stress fitting part; a pressure relief detection part is installed on the pressure supply device; a mark part is installed on the rotary driving part; a pre-closing part is installed on the mark part; the pressure supply device can be used for automatically controlling pressure supply test work after the air bag generator upper cover and lower cover are docked, and the air bag generator upper cover and lower cover sealing performance can be tested; the application solves the problems that the current steering wheel air bag generator welding device is inconvenient for closed seam test seam end face sealing performance, and manual cleaning of external welding slag is easy to be forgotten.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of airbag inflator welding, in particular to a steering wheel part welding device and a welding process thereof. BACKGROUND

[0002] In the steering wheel part, the airbag inflator is an important component, and its structure usually needs to be welded into shape by upper and lower covers. The airbag inflator upper cover is provided with a ring of air outlet holes for inflating the airbag. In actual airbag inflator welding work, the welding quality is strictly required. Once the sealing does not meet the standard, it will directly affect the airbag inflation. The current steering wheel airbag inflator welding device usually adopts a clamp to hold and then perform fine welding work. However, the traditional clamp is not convenient for closed seam test and seam end face sealing. Once there is a gap in the local part, the welding slag produced by welding is easy to splash into the airbag inflator. At the same time, it is not convenient to mark the defective products. In the continuous welding work, the worker is easy to forget to clean the external welding slag in time. If the welding slag is not cleaned in time, it is easy to cause the external welding slag to invade the airbag inflator.

[0003] Therefore, the present application provides a steering wheel part welding device and a welding process thereof. SUMMARY

[0004] The present application aims to provide a steering wheel part welding device and a welding process thereof to solve the problem of the current steering wheel airbag inflator welding device which is not convenient for closed seam test and seam end face sealing and the worker is easy to forget to clean the external welding slag in time.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a steering wheel part welding device, comprising a rotary drive member, a pre-stress fitting member is installed on the rotary drive member, and the pre-stress fitting member is used to apply pre-stress to the airbag inflator upper cover; a pressure device is installed on the pre-stress fitting member; a pressure relief detection member is installed on the pressure device; a marking part is installed on the rotary drive member; a pre-closed part is installed on the marking part; the rotary drive member comprises a rotary mounting frame and a prompt light, and the prompt light is fixedly installed on the rotary mounting frame.

[0006] Preferably, the rotary drive member further comprises a motor housing, a rotary motor and a rotary lower housing, the motor housing is fixedly installed on the rotary mounting frame, the rotary motor is fixedly installed inside the motor housing, and the output shaft of the rotary motor penetrates through the motor housing, the rotary lower housing is fixedly installed on the output shaft of the rotary motor, two bolt holes are arranged at the bottom of the rotary mounting frame, and a rubber sealing ring is arranged on the inner side of the rotary lower housing.

[0007] Preferably, the pre-stressed fitting comprises: a down hydraulic cylinder, a pressure switch, a gas blowing switch, a down shell and a rotary upper shell, the down hydraulic cylinder is fixedly installed on the rotary mounting frame; the output shaft of the down hydraulic cylinder penetrates through the rotary mounting frame; the output shaft of the down hydraulic cylinder is fixedly installed with the pressure switch; the output shaft of the down hydraulic cylinder is fixedly installed with the gas blowing switch; the down shell is slidably sleeved on the output shaft of the down hydraulic cylinder; a spring is sleeved in the down shell, and the spring in the down shell is connected between the down shell and the output shaft of the down hydraulic cylinder; a bearing is fixedly sleeved on the outer side of the down shell, and the outer ring of the bearing sleeved on the outer side of the down shell is fixedly installed with the rotary upper shell, and the rotary upper shell is provided with a circle of through holes; the inner side of the rotary upper shell is provided with a rubber sealing ring.

[0008] Preferably, the pressure device comprises: a pressure ring and a pressure pipe, the inner side of the pressure ring is provided with a rubber ring; the rotary upper shell is rotatably sleeved on the pressure ring, and the pressure ring is aligned with the circle of through holes on the rotary upper shell; the pressure pipe is fixedly installed on the pressure ring; the pressure pipe is externally connected with an air pump.

[0009] Preferably, the pressure relief detection part comprises: a pressure switch and a pressure gauge, the pressure switch is fixedly installed on the pressure pipe; the pressure gauge is fixedly installed on the pressure ring; the end of the pressure switch and the pressure gauge is communicated with the inside of the pressure ring.

[0010] Preferably, the marking part comprises: a marking mounting frame and a paint pipe, the marking mounting frame is fixedly installed on the rotary mounting frame; the paint pipe is fixedly installed on the marking mounting frame, and the paint pipe is externally connected with a paint pump; the end of the paint pipe is provided with a spray head.

[0011] Preferably, the marking part further comprises: a paint spraying electromagnetic valve, the paint spraying electromagnetic valve is fixedly installed on the paint pipe; the pressure switch, the pressure gauge, the prompt lamp, the paint spraying electromagnetic valve and the paint pump externally connected with the paint pipe are connected in series with a power supply.

[0012] Preferably, the pre-sealing part comprises: a gas spraying ring and a gas pipe, the gas spraying ring is fixedly installed on the paint pipe; the gas spraying ring is located outside the joint; the gas pipe is fixedly installed at the bottom of the gas spraying ring; the gas pipe is externally connected with an air blower.

[0013] Preferably, the pre-sealing part further comprises: a gas supplying electromagnetic valve, the gas supplying electromagnetic valve is fixedly installed on the gas pipe; the gas supplying electromagnetic valve is electrically connected with the gas blowing switch.

[0014] A steering wheel part welding process:

[0015] 1), insert the air bag generator lower cover into the rotary lower shell, insert the air bag generator upper cover into the rotary upper shell, and seal the air bag generator upper and lower covers through the rubber rings on the inner sides of the rotary lower shell and the rotary upper shell;

[0016] 2), control the down hydraulic cylinder to push the rotary upper shell to move down, drive the air bag generator upper and lower cover to tightly adhere and then carry out the welding work.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] The present application adopts prestressed fitting part to control the air bag generator upper and lower cover during butt joint, assists in prestressed butt joint, ensures the air bag generator upper and lower cover tightly adhere, prevents the welding slag from splashing into the air bag generator during subsequent welding process, ensures the air bag generator upper and lower cover inside clean, and cooperates with the pressure device to automatically control the pressure test work after the air bag generator upper and lower cover butt joint, tests the air bag generator upper and lower cover sealing performance, adopts pressure relief detection part to control the air bag generator upper and lower cover leakage detection, automatically controls the staff when leakage occurs, ensures the welding quality of finished air bag generator and the safety of internal filling material, and cooperates with the marking part to automatically control the air bag generator upper and lower cover leakage marking work, which is convenient for subsequent sorting for further grinding treatment.

[0019] The pre-sealing part can automatically control the air bag generator upper and lower cover after welding, blow gas to clean the welding slag particles, clean when the air bag generator is not completely removed, avoid dust invasion into the opening at the bottom of the air bag generator lower cover after the air bag generator lower cover is removed from the rotary lower shell, further cause pollution, ensure the accurate dust removal time, and avoid secondary pollution. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a whole structure schematic view of a steering wheel part welding device of the present application;

[0021] Figure 2 It is a bottom structure schematic view of a steering wheel part welding device of the present application;

[0022] Figure 3 It is an internal structure schematic view of a steering wheel part welding device of the present application;

[0023] Figure 4 It is a rotary drive part structure schematic view of the present application;

[0024] Figure 5 It is a prestressed fitting part structure schematic view of the present application;

[0025] Figure 6 It is a pressure relief detection part structure schematic view of the present application;

[0026] Figure 7 It is a pre-sealing part structure schematic view of the present application Figure 3Enlarged view of the middle B area structure;

[0027] Figure 8 Schematic view of the pre-closed piece structure of the present application;

[0028] Figure 9 Connection system diagram of the pressure giving switch and the air blowing switch of the present application.

[0029] In the figure: 1, rotary driving member; 101, rotary mounting frame; 1011, prompt light; 102, motor shell; 103, rotary motor; 104, rotary lower shell; 2, pre-stress fitting member; 201, downward pressing hydraulic cylinder; 202, pressure giving switch; 2021, air blowing switch; 203, downward pressing shell; 204, rotary upper shell; 3, pressure giving device; 301, pressure giving ring; 302, pressure giving pipe; 4, pressure relief detection member; 401, pressure switch; 402, pressure gauge; 5, marking part; 501, marking mounting frame; 502, paint pipe; 503, paint spraying electromagnetic valve; 6, pre-closed piece; 601, air blowing ring; 602, air giving pipe; 603, air giving electromagnetic valve. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0031] Embodiment one: please refer to Figures 1 to 9 as shown:

[0032] The present application provides a technical solution: a steering wheel part welding device, comprising a rotary driving member 1, a pre-stress fitting member 2 is installed on the rotary driving member 1, the pre-stress fitting member 2 is used for applying pre-stress to the air bag generator upper cover; a pressure giving device 3 is installed on the pre-stress fitting member 2; a pressure relief detection member 4 is installed on the pressure giving device 3; a marking part 5 is installed on the rotary driving member 1; a pre-closed piece 6 is installed on the marking part 5; the rotary driving member 1 comprises: a rotary mounting frame 101 and a prompt light 1011, the prompt light 1011 is fixedly installed on the rotary mounting frame 101.

[0033] The rotary driving part 1 further comprises a motor shell 102, a rotary motor 103 and a rotary lower shell 104, the motor shell 102 is fixedly installed on the rotary mounting frame 101, the rotary motor 103 is fixedly installed inside the motor shell 102, and the output shaft of the rotary motor 103 penetrates through the motor shell 102, the rotary lower shell 104 is fixedly installed on the output shaft of the rotary motor 103, two bolt holes are arranged at the bottom of the rotary mounting frame 101, a rubber sealing ring is arranged on the inner side of the rotary lower shell 104, the pre-stress fitting part 2 comprises a downward pressing hydraulic cylinder 201, a pressure giving switch 202, a gas blowing switch 2021, a downward pressing shell 203 and a rotary upper shell 204, the downward pressing hydraulic cylinder 201 is fixedly installed on the rotary mounting frame 101, the output shaft of the downward pressing hydraulic cylinder 201 penetrates through the rotary mounting frame 101, the pressure giving switch 202 is fixedly installed on the output shaft of the downward pressing hydraulic cylinder 201, the gas blowing switch 2021 is fixedly installed on the output shaft of the downward pressing hydraulic cylinder 201, the downward pressing shell 203 is slidingly sleeved on the output shaft of the downward pressing hydraulic cylinder 201, a spring is sleeved inside the downward pressing shell 203, and the spring inside the downward pressing shell 203 is connected between the downward pressing shell 203 and the output shaft of the downward pressing hydraulic cylinder 201, a bearing is fixedly sleeved outside the downward pressing shell 203, the rotary upper shell 204 is fixedly installed on the outer ring of the bearing sleeved outside the downward pressing shell 203, and a circle of through holes is arranged on the rotary upper shell 204, a rubber sealing ring is arranged on the inner side of the rotary upper shell 204, the pressure giving device 3 comprises a pressure giving ring 301 and a pressure giving pipe 302, the pressure giving pipe 302 is connected with an air pump, the air pump connected with the pressure giving pipe 302 is a constant pressure air pump, and a rubber ring is arranged on the inner side of the pressure giving ring 301, the rotary upper shell 204 is rotationally sleeved on the pressure giving ring 301, the pressure giving ring 301 is aligned with the circle of through holes on the rotary upper shell 204, and the pressure giving pipe 302 is fixedly installed on the pressure giving ring 301, the pre-stress fitting part 2 can control the pre-stress butt joint when the upper and lower covers of the air bag generator are butt jointed, assist in pre-stress butt joint, ensure that the upper and lower covers of the air bag generator are closely fitted, prevent welding slag from splashing into the inside of the air bag generator in the subsequent welding process, ensure that the inside of the upper and lower covers of the air bag generator is clean, and the pressure giving device 3 can automatically control the pressure test work after the upper and lower covers of the air bag generator are butt jointed, test the air tightness of the upper and lower covers of the air bag generator, and can be directly prompted through the pressure gauge 402, so as to avoid that the fitting degree is affected when the end surface of the upper and lower covers of the air bag generator is not flat or there are impurities such as iron filings, thereby affecting the welding seam forming quality, ensure that the upper and lower covers of the air bag generator are closely fitted during actual welding, the structure can automatically control the pressure, and the welding efficiency is not affected, the welding work cannot be completed under the action of air pressure once there is leakage in the welding seam through the way of air pressure during welding.

[0034] The pressure relief detection piece 4 comprises a pressure switch 401 and a pressure gauge 402, the pressure switch 401 is fixedly installed on the pressure supply pipe 302, the pressure gauge 402 is fixedly installed on the pressure supply ring 301, the end of the pressure switch 401 and the pressure gauge 402 is communicated with the inside of the pressure supply ring 301, the PSD-4 type pressure switch 401 can be used, the marking part 5 comprises a marking installation frame 501 and a paint pipe 502, the marking installation frame 501 is fixedly installed on the rotary installation frame 101, the paint pipe 502 is fixedly installed on the marking installation frame 501, and the paint pipe 502 is connected with a paint pump, the end of the paint pipe 502 is provided with a spray head, the marking part 5 further comprises a paint spraying electromagnetic valve 503, the paint spraying electromagnetic valve 503 is fixedly installed on the paint pipe 502, the pressure switch 401, the pressure gauge 402, the prompt lamp 1011, the paint spraying electromagnetic valve 503 and the paint pump connected with the paint pipe 502 are connected in series with a power supply, the pressure relief detection piece 4 can detect the air leakage between the upper cover and the lower cover of the air bag generator, can automatically control the staff when the leakage occurs, ensures the welding quality of the finished air bag generator and the safety of the internal filling of the generating material, uses the pressure detection mode which is more direct, and cooperates with the marking part 5 to automatically control the marking work of the upper cover and the lower cover of the air bag generator which leaks, so that subsequent sorting can be facilitated to further polish, when the upper cover of the air bag generator is moved downward to be attached to the lower cover of the air bag generator, the output shaft of the downward hydraulic cylinder 201 will continue to move downward, compresses the spring in the downward shell 203, in the process, the pressure supply ring 301 can supply pressure between the upper cover and the lower cover of the air bag generator, the pressure switch 401 can detect the pressure rise, and when the output shaft of the downward hydraulic cylinder 201 continues to stretch, the pressure supply switch 202 will be moved downward to be attached to the downward shell 203, at this time, the pressure supply switch 202 is pressed to be connected, but at this time, the paint spraying electromagnetic valve 503 is still closed, because the pressure switch 401 can detect that the pressure between the upper cover and the lower cover of the air bag generator reaches the standard, at this time, the pressure switch 401 is in the closed state, otherwise, if there is leakage between the upper cover and the lower cover of the air bag generator, the spring in the downward shell 203 is compressed in the process of the upper cover of the air bag generator being attached to the lower cover of the air bag generator, there is always leakage, the pressure is reduced, the pressure switch 401 is in the power-on state, when the pressure supply switch 202 is moved downward to be attached to the downward shell 203, the pressure supply switch 202 and the pressure switch 401 are connected at the same time, so that the paint spraying electromagnetic valve 503 and the paint pump connected with the paint pipe 502 can be controlled to start to spray paint marking.

[0035] In the second embodiment, the pre-sealing part 6 includes a jet ring 601 and a gas supply pipe 602. The jet ring 601 is fixedly installed on the paint pipe 502. The jet ring 601 is located outside the joint. The gas supply pipe 602 is fixedly installed at the bottom of the jet ring 601. The jet ring 601 is located outside the joint. The gas supply pipe 602 is connected with a blower. The pre-sealing part 6 further includes a gas supply electromagnetic valve 603, which is fixedly installed on the gas supply pipe 602. The gas supply electromagnetic valve 603 is electrically connected with the air blowing switch 2021. The pre-sealing part 6 can automatically control the blowing and cleaning of welding slag particles after the welding of the upper and lower covers of the air bag generator. The cleaning can be performed when the air bag generator is not completely removed, thereby avoiding the dust from entering the opening at the bottom of the lower cover of the air bag generator after the welding, which further causes pollution. The cleaning time is accurate, and secondary pollution is avoided. When the output shaft of the pressing hydraulic cylinder 201 moves back, the upper rotating shell 204 remains elastic under the spring compression in the pressing shell 203. At this time, the welded air bag generator cannot be removed. When the air blowing switch 2021 is not pressed, the gas supply electromagnetic valve 603 is directly opened to blow and clean the welding slag.

[0036] A steering wheel part welding process

[0037] 1) Insert the air bag generator lower cover into the rotating lower shell 104, and insert the air bag generator upper cover into the rotating upper shell 204. The air bag generator upper and lower covers are sealed by the rubber rings inside the rotating lower shell 104 and the rotating upper shell 204.

[0038] 2) Control the pressing hydraulic cylinder 201 to push the rotating upper shell 204 to move down, and drive the air bag generator upper and lower covers to tightly fit and then perform welding work.

[0039] The working principle of the embodiment: before batch detection, first turn on the equipment control power supply, install two bolt holes at the bottom of the rotary mounting frame 101 on the workbench with bolts, insert the air bag generator lower cover into the rotary lower shell 104, insert the air bag generator upper cover into the rotary upper shell 204, and seal through the rubber rings inside the rotary lower shell 104 and the rotary upper shell 204 respectively. In the process, the air pump connected to the pressure pipe 302 supplies air, controls the output shaft of the lower hydraulic cylinder 201 to drive the rotary upper shell 204 to move down, drives the air bag generator upper and lower covers to tightly fit, at this time, the rotary motor 103 can be controlled to drive the rotary lower shell 104 to rotate, the air bag generator upper cover tightly fits the air bag generator lower cover, which can be spot welded first. With the rotation of the rotary lower shell 104 driving the air bag generator upper and lower covers, the bearings between the lower pressing shell 203 and the rotary upper shell 204 are used to prevent jamming and not affect the rotation of the air bag generator upper cover. At this time, the weld joint can be welded by a welding gun, and if the air bag generator upper and lower covers leak during the process, welding cannot be performed.

[0040] When the lower cover of the airbag inflator is moved downward to fit the upper cover of the airbag inflator, the output shaft of the lower pressing hydraulic cylinder 201 will continue to move downward, compressing the spring inside the lower pressing shell 203. In the process, the air pressure between the upper and lower covers of the airbag inflator can be added by the pressure ring 301. The gas flows from the pressure ring 301 to the upper and lower covers of the airbag inflator, and the pressure switch 401 can detect the pressure rise to the standard. At the same time, when the output shaft of the lower pressing hydraulic cylinder 201 continues to extend, it will drive the pressure switch 202 to move downward to fit the lower pressing shell 203. At this time, the pressure switch 202 is pressed to open the path (in this process, the air blowing switch 2021 is also pressed, and the gas supply electromagnetic valve 603 is in the closed state). However, at this time, the paint spraying electromagnetic valve 503 will remain closed, because the pressure switch 401 detects that the pressure between the upper and lower covers of the airbag inflator has reached the standard, and the pressure switch 401 is in the closed state. Conversely, if there is a leak between the upper and lower covers of the airbag inflator, when the upper and lower covers of the airbag inflator are fitted, the spring inside the lower pressing shell 203 is compressed. If the fit between the upper and lower covers of the airbag inflator is not up to standard and there is always a leak, the pressure switch 401 is in the power-on state, and the warning light 1011 also remains on to indicate that the pressure switch 202 and the pressure switch 401 can control the paint spraying electromagnetic valve 503 and the paint pump connected to the paint pipe 502 to open the paint spraying mark. At this time, the worker needs to control the output shaft of the lower pressing hydraulic cylinder 201 to drive the rotary upper shell 204 to move upward and reset. At this time, the pressure switch 202 moves upward together and no longer presses the lower pressing shell 203, so as to control the paint spraying electromagnetic valve 503 and the paint pump connected to the paint pipe 502 to close, realizing the stop mark. The way of using the pressure switch 202 and the pressure switch 401 to control the paint spraying electromagnetic valve 503 and the paint pump connected to the paint pipe 502 ensures that the leak detection mark work is performed after the upper and lower covers of the airbag inflator are completely fitted. After the upper and lower covers of the airbag inflator are welded, impurities such as welding slag may exist on the rotary lower shell 104. At this time, when the output shaft of the lower pressing hydraulic cylinder 201 moves back and retracts, the air blowing switch 2021 at the end of the output shaft of the lower pressing hydraulic cylinder 201 will also move upward. At this time, under the extrusion of the spring inside the lower pressing shell 203, the rotary upper shell 204 still remains elastic and presses downward. At this time, the welded airbag inflator cannot be removed, and when the air blowing switch 2021 is not pressed, the gas supply electromagnetic valve 603 is directly opened, and the air is blown through the air blowing ring 601 to clean. When the output shaft of the lower pressing hydraulic cylinder 201 continues to retract, the spring inside the lower pressing shell 203 is not compressed, and the lower pressing shell 203 drives the rotary upper shell 204 to move upward, no longer clamping the airbag inflator. At this time, the welding slag has been cleaned and the airbag inflator can be normally pulled out, reducing the secondary pollution of the airbag inflator, and there is no need for manual cleaning with an air gun.

[0041] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the scope of the present application is not limited to these specific embodiments.

[0042] While the embodiments of the application have been shown and described herein, it will be understood by those skilled in the art that many changes, modifications, substitutions and alterations to these embodiments can be made without departing from the principles and spirits of the application, and it is intended that the scope of the application be limited solely by the scope of the appended claims and the equivalents thereof.

Claims

1. A steering wheel component welding device, comprising a rotary drive component (1), wherein a prestressed bonding component (2) is mounted on the rotary drive component (1), characterized in that: A pressure-applying device (3) is installed on the prestressed bonding component (2); The pressure supply device (3) is equipped with a pressure relief detection device (4); A marking part (5) is installed on the rotary drive component (1); a pre-sealing part (6) is installed on the marking part (5); The rotary drive component (1) includes: a rotary mounting bracket (101) and an indicator light (1011), wherein the indicator light (1011) is fixedly mounted on the rotary mounting bracket (101). The rotary drive component (1) further includes: a motor housing (102), a rotary motor (103), and a rotary lower housing (104). The motor housing (102) is fixedly mounted on the rotary mounting bracket (101). The rotary motor (103) is fixedly mounted inside the motor housing (102), and the output shaft of the rotary motor (103) passes through the motor housing (102). The rotary lower housing (104) is fixedly mounted on the output shaft of the rotary motor (103). The rotary mounting bracket (101) has two bolt holes at its bottom. The rotary lower housing (104) has a rubber sealing ring on its inner side. The prestressed bonding component (2) includes: a downward hydraulic cylinder (201), a pressure switch (202), an air blow switch (2021), a downward housing (203), and a rotating upper housing (204). The downward hydraulic cylinder (201) is fixedly mounted on the rotating mounting frame (101). The output shaft of the downward hydraulic cylinder (201) passes through the rotating mounting frame (101). The pressure switch (202) is fixedly mounted on the output shaft of the downward hydraulic cylinder (201). The air blow switch (2021) is fixedly mounted on the output shaft of the downward hydraulic cylinder (201). The lower pressure shell (203) is slidably sleeved on the output shaft of the lower pressure hydraulic cylinder (201); a spring is sleeved inside the lower pressure shell (203), and the spring inside the lower pressure shell (203) is connected between the lower pressure shell (203) and the output shaft of the lower pressure hydraulic cylinder (201); a bearing is fixedly sleeved on the outside of the lower pressure shell (203), and a rotating upper shell (204) is fixedly installed on the outer ring of the bearing sleeved on the outside of the lower pressure shell (203), and a through hole is provided on the rotating upper shell (204); a rubber sealing ring is provided on the inner side of the rotating upper shell (204); The pressure device (3) includes: a pressure ring (301) and a pressure pipe (302). The pressure ring (301) is provided with a rubber ring on its inner side. The rotating upper shell (204) is rotatably sleeved on the pressure ring (301), and the pressure ring (301) is aligned with a through hole on the rotating upper shell (204). The pressure pipe (302) is fixedly installed on the pressure ring (301). The pressure pipe (302) is connected to an air pump.

2. The steering wheel component welding device according to claim 1, characterized in that: The pressure relief detection component (4) includes a pressure switch (401) and a pressure gauge (402). The pressure switch (401) is fixedly installed on the pressure supply pipe (302). The pressure gauge (402) is fixedly installed on the pressure supply ring (301). The ends of the pressure switch (401) and the pressure gauge (402) are respectively connected to the inside of the pressure supply ring (301).

3. The steering wheel component welding device according to claim 2, characterized in that: The marking unit (5) includes: a marking mounting frame (501) and a paint tube (502). The marking mounting frame (501) is fixedly mounted on the rotary mounting frame (101). The paint tube (502) is fixedly mounted on the marking mounting frame (501), and the paint tube (502) is connected to a paint pump. The end of the paint tube (502) is provided with a nozzle.

4. The steering wheel component welding device according to claim 3, characterized in that: The marking part (5) further includes: a paint spraying solenoid valve (503), which is fixedly installed on the paint pipe (502); and a paint pump connected in series to the pressure switch (202), pressure switch (401), indicator light (1011), paint spraying solenoid valve (503) and paint pipe (502).

5. A steering wheel component welding device according to claim 3, characterized in that: The pre-sealing component (6) includes: a jet ring (601) and an air supply pipe (602). The jet ring (601) is fixedly installed on the paint pipe (502). The jet ring (601) is located outside the joint. The air supply pipe (602) is fixedly installed at the bottom of the jet ring (601). The air supply pipe (602) is connected to an external fan.

6. The steering wheel component welding device according to claim 5, characterized in that: The pre-sealing component (6) further includes: an air supply solenoid valve (603), which is fixedly installed on the air supply pipe (602); the air supply solenoid valve (603) is electrically connected to the air blow switch (2021).

7. A welding process for steering wheel components, using the steering wheel component welding apparatus described in claim 1, characterized in that: The steps include: 1) Insert the lower cover of the airbag generator into the lower rotating shell (104) and the upper cover of the airbag generator into the upper rotating shell (204). Seal the upper and lower covers of the airbag generator with rubber rings on the inner sides of the lower rotating shell (104) and the upper rotating shell (204). 2) Control the downward hydraulic cylinder (201) to push the rotating upper shell (204) down, so that the upper and lower covers of the airbag generator can be tightly fitted together and then welding work can be carried out.

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