Sealing equipment for tube shell of gas generator of automobile safety airbag

Abstract

The invention relates to the related technical field of pipe fitting sealing, in particular to automobile safety airbag gas generator pipe shell sealing equipment which comprises an equipment support, a rotating spindle box, a high-frequency heating system and a sealing rotating cutter mechanism, a mounting rail and a linear guide rail are fixedly mounted on the upper end face of the equipment support, and the rotating spindle box is arranged on the upper end face of the equipment support; the rotating spindle box comprises a spindle mounting box, a spindle, a workpiece positioning mechanism and a spindle driving motor, and the generator tube shell to be machined is positioned through the workpiece positioning mechanism; the sealing device for the tube shell of the gas generator of the automobile safety airbag is composed of a device support, a rotating spindle box, a high-frequency heating system and a sealing rotating cutter mechanism, and the sealing rotating cutter mechanism is composed of a moving seat, a steering motor, a steering seat, a sealing motor and a sealing cutter head. And therefore, the steering motor drives the sealing tool bit to continuously perform angle deviation, and the sealing effect on the end opening of the generator tube shell is achieved.

Description

Technical Field

[0001] The invention relates to the technical field related to pipe sealing, in particular to a pipe shell sealing device for a gas generator of an automobile safety airbag. Background Art

[0002] The existing Chinese patent document with the announcement number CN108188737B discloses a processing device for sealing metal pipes, and the scheme includes a control system, a sealing mechanism and a post-processing mechanism. The sealing mechanism is composed of a No. 1 frame, a No. 1 workbench, a No. 1 feed box, a motor, a grinding wheel, a No. 1 cylinder, a No. 2 cylinder, a No. 3 cylinder, a No. 1 feeding assembly, a clamping block, a No. 1 positioning element and a No. 1 discharge guide plate; the No. 1 workbench is fixed on the No. 1 frame, and a grinding wheel, a No. 1 cylinder, a No. 2 cylinder and a No. 3 cylinder are arranged on the No. 1 workbench, and the No. 1 cylinder The telescopic end of the No. 1 cylinder is arranged directly opposite to the grinding wheel, and the telescopic end of the No. 2 cylinder is arranged directly opposite to the telescopic end of the No. 3 cylinder, so that the connection line formed between the No. 1 cylinder and the grinding wheel and the connection line formed between the No. 2 cylinder and the No. 3 cylinder intersect and form a right-angle structure; a groove with a hemispherical structure is provided on the side of the grinding wheel facing the No. 1 cylinder, and the motor is connected to the grinding wheel, so that the grinding wheel is driven to rotate by the motor; a No. 1 positioning element is provided on the telescopic end of the No. 1 cylinder, and a positioning hole for positioning the metal pipe is provided on the side of the No. 1 positioning element facing the grinding wheel;

[0003] However, the positioning structure for the pipe is relatively simple, and its single clamping force can easily cause deformation of the thinner-walled pipe. Reducing the clamping force will lead to lower clamping stability of the pipe, thereby reducing the processing accuracy. For this reason, the present invention proposes a tube shell sealing device for an automobile airbag gas generator to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a tube shell sealing device for an automobile safety airbag gas generator to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a sealing device for a tube shell of an automobile safety airbag gas generator, comprising:

[0006] An equipment bracket, wherein a mounting rail and a linear guide rail are fixedly mounted on the upper end surface of the equipment bracket;

[0007] A rotating spindle box, wherein the rotating spindle box is arranged on the upper end surface of the equipment bracket, and the rotating spindle box includes a spindle mounting box, a spindle, a workpiece positioning mechanism and a spindle driving motor, and the generator tube shell to be processed is positioned by the workpiece positioning mechanism;

[0008] A high-frequency heating system, wherein the high-frequency heating system is installed on a rotating spindle box, and the high-frequency heating system comprises a high-frequency heating system mainframe and a heating head, wherein the high-frequency heating system mainframe is fixed on an equipment bracket, and the heating head is positioned on the spindle mounting box through a heating head bracket, and the bottom of the heating head is arranged in a spiral shape;

[0009] The sealing rotary knife mechanism is arranged on the upper end surface of the equipment bracket, and the sealing rotary knife mechanism includes a moving seat, a steering motor, a steering seat, a sealing motor and a sealing knife head.

[0010] Preferably, the spindle mounting box is installed on a mounting track, and the spindle mounting box is positioned by adjusting the positioning mechanism, the spindle is rotatably mounted on the spindle mounting box through a front ball bearing and a rear ball bearing, the workpiece positioning mechanism is fixed to the front end of the spindle, a driven pulley is fixedly mounted on the rear end of the spindle, the spindle drive motor is fixed to the side wall of the spindle mounting box, and a transmission pulley is fixedly mounted on the output shaft of the spindle drive motor, the transmission pulley and the driven pulley are connected by a transmission belt, and when the spindle drive motor and the sealing motor are actually in operation, the contact surfaces of the sealing cutter head and the generator tube shell move towards each other.

[0011] Preferably, the movable seat is movably mounted on a linear guide rail, and the movable seat is driven by a telescopic electric cylinder on an equipment bracket, the steering motor is fixedly mounted on the movable seat, one end of the steering seat is fixedly connected to the output shaft of the steering motor, the sealing motor is fixed to the other end of the steering seat, and the sealing cutter head is fixed to the output shaft of the sealing motor. When the generator tube shell is actually installed, the end of the generator tube shell passes through the spiral portion on the heating head, and when the steering seat is in a horizontal state, the side edge of the sealing cutter head is arranged in contact with the outer end side wall of the generator tube shell, and after the steering seat is rotated ninety degrees counterclockwise, the sealing cutter head forms a bending and sealing effect on the outer end of the generator tube shell.

[0012] Preferably, the workpiece positioning mechanism includes a mounting seat, a clamping mechanism and a front cover plate, the mounting seat is provided with a primary piston cavity, the top surface of the primary piston cavity is provided with a primary air duct, the front cover plate is positioned on the mounting seat by a screw structure, and the front cover plate forms a seal for the primary piston cavity, the clamping mechanism is movably arranged in the primary piston cavity, the main shaft is provided with an air cavity, a sealing member is fixedly installed on the front side end of the air cavity, the sealing member is provided with a main air duct, and a secondary air duct is provided on the side wall of the main air duct, and when the sealing member is actually installed, the secondary air duct is arranged relative to the primary air duct.

[0013] Preferably, an air supply pipe is rotatably installed at the rear port of the air cavity through a sealed bearing, the air supply pipe is a hard steel pipe, and the air supply pipe is positioned on the rear wall of the spindle mounting box through a pipe positioning seat, and the end of the air supply pipe is connected to the air pump structure on the spindle mounting box.

[0014] Preferably, the clamping mechanism includes a primary piston, a secondary piston and a movable clamping seat, the primary piston is movably arranged in the primary piston cavity, and a primary spring groove is provided on the primary piston, a primary return spring is fixedly connected to the bottom of the primary spring groove, a secondary piston groove and a movable groove are provided on the primary piston, the secondary piston is movably arranged in the secondary piston groove, and a piston hole is provided on the bottom surface of the secondary piston groove, a piston rod is fixedly connected to the bottom surface of the secondary piston, the piston rod is movably arranged in the piston hole, a secondary spring groove is provided on the secondary piston, and a secondary return spring is fixedly connected to the bottom of the secondary spring groove.

[0015] Preferably, the movable clamp seat is movably arranged in the movable groove, and a three-stage spring groove is opened on the movable clamp seat, the bottom of the three-stage spring groove is fixedly connected with a support spring, the outer end of the support spring is fixedly connected to the bottom of the movable groove, when the first-stage reset spring is in the reset state, the first-stage piston is in contact with the top surface of the first-stage piston cavity, when the second-stage reset spring is in the reset state, the lower side surface of the second-stage piston is in contact with the bottom surface of the second-stage piston groove, when the support spring is in the reset state, the lower half of the movable clamp seat pops out to the outside of the movable groove, the lower end surface of the movable clamp seat is arranged in an arc shape, and the curvature value of the lower end surface of the movable clamp seat is consistent with the curvature value of the outer wall of the generator tube shell.

[0016] Preferably, a secondary air duct is provided on the bottom surface of the secondary piston groove, and a tertiary air duct is provided on the bottom surface of the tertiary spring groove. The secondary air duct and the tertiary air duct are connected by a steel bellows, and the steel bellows passes through the inner cavity of the support spring. An air chamber is provided on the movable clamp seat, and the air chamber is connected to the tertiary air duct. An adsorption groove is provided on the lower end surface of the movable clamp seat, and the adsorption groove is connected to the air chamber through a connecting air duct, and a plurality of groups of adsorption grooves are evenly arranged on the lower end surface of the movable clamp seat.

[0017] Preferably, a force-bearing head is fixedly connected to the end of the piston rod. After the first-level piston cavity is inflated, the first-level piston moves inward, and at this time, the force-bearing heads in three directions generate force, and then push the second-level piston to move outward in the second-level piston groove, so that the second-level piston groove is located in the lower half of the cavity of the second-level piston to generate negative pressure, thereby generating negative pressure in the adsorption groove to produce an adsorption positioning effect on the outer wall of the generator tube shell. When the generator tube shell is actually installed, the inner end of the generator tube shell is set against the side wall of the piston rod, and when the first-level piston cavity is in a pressure relief state, the force-bearing heads are all set close to each other.

[0018] Preferably, a primary sealing gasket is provided between the main shaft and the sealing member, a secondary sealing gasket is provided between the mounting seat and the front cover plate, the primary piston is formed by splicing two parts, and the splicing part is sealed, a tertiary sealing gasket is provided at the docking position of the secondary air duct and the primary air duct, a sealing groove is provided at the edge of the adsorption groove, and a metal sealing ring is fixedly glued in the sealing groove.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. By setting up a sealing device for the tube shell of an automobile safety airbag gas generator composed of a device bracket, a rotating spindle box, a high-frequency heating system and a sealing rotary knife mechanism, and by setting the sealing rotary knife mechanism to be composed of a moving seat, a steering motor, a steering seat, a sealing motor and a sealing cutter head, the sealing cutter head is driven by the steering motor to continuously deflect the angle, thereby achieving a sealing effect on the port of the generator tube shell;

[0021] 2. The workpiece positioning mechanism is configured to be composed of a mounting seat, a clamping mechanism and a front cover plate, and the clamping mechanism is configured to be composed of a primary piston, a secondary piston and a movable clamp seat, and a secondary piston groove and a movable groove are opened on the primary piston, and a piston rod is connected to the bottom surface of the secondary piston, so that when the primary piston moves inward, a force is formed between the force heads at the ends of the piston rod in all directions, so that the secondary piston moves outward, thereby forming a suction effect, so that the adsorption groove on the movable clamp seat generates a negative pressure adsorption effect, and the clamping force and the negative pressure adsorption force work together to effectively ensure the positioning stability of the generator tube shell by the workpiece positioning mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the front side structure of the present invention;

[0023] Figure 2 for Figure 1 A schematic diagram of the structure enlargement in the middle;

[0024] Figure 3 It is a schematic diagram of the rear side structure of the present invention;

[0025] Figure 4 for Figure 2 A magnified schematic diagram of the structure at B in the middle;

[0026] Figure 5 A half-section view of the rotating headstock of the present invention;

[0027] Figure 6 for Figure 5 A magnified schematic diagram of the structure at C in the middle;

[0028] Figure 7 for Figure 6 A magnified schematic diagram of the structure at D in the middle;

[0029] Figure 8 for Figure 7 The enlarged schematic diagram of the structure at E in the middle;

[0030] Fig. 9 This is a schematic diagram of the mounting seat structure of the present invention;

[0031] Fig.10 This is a schematic diagram of the structure of the first-stage piston of the present invention;

[0032] Fig.11 for Fig.10 The enlarged schematic diagram of the structure at F in the middle;

[0033] Fig.12 This is the effect diagram of the force head docking;

[0034] Fig.13 It is a schematic diagram of the sealing member structure of the present invention.

[0035] In the figure: equipment bracket 1, spindle installation box 2, spindle 3, workpiece positioning mechanism 4, spindle drive motor 5, installation track 6, adjustment positioning mechanism 7, front ball bearing 8, rear ball bearing 9, driven pulley 10, generator tube shell 11, drive pulley 12, drive belt 13, moving seat 14, steering motor 15, steering seat 16, sealing motor 17, sealing knife head 18, linear guide 19, telescopic electric cylinder 20, heating head 21, heating head bracket 22, air cavity 23, sealing member 24, main airway 25, secondary airway 26, mounting seat 27, clamping mechanism 28, front cover plate 29, primary piston cavity 30, a primary air duct 31, a primary spring groove 32, a primary piston 33, a secondary piston 34, a movable clamp seat 35, a secondary piston groove 36, a secondary return spring 37, a piston rod 38, a force head 39, a support spring 40, a secondary air duct 41, a third-level air duct 42 is opened on the bottom surface of the third-level spring groove, the second-level air duct 41, the third-level air duct 42, the steel bellows 43, the air chamber 44, the connecting air duct 45, the adsorption groove 46, the sealing bearing 47, the air supply pipe 48, the pipe positioning seat 49, the primary sealing gasket 50, the secondary sealing gasket 51, the sealing groove 52, the metal sealing ring 53, and the third-level sealing gasket 54. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-13 The present invention provides the following three preferred embodiments:

[0038] Embodiment 1: A sealing device for a tube shell of a gas generator for an automobile safety airbag comprises a device support 1, a rotating spindle box, a high-frequency heating system and a sealing rotary cutter mechanism. The upper end surface of the device support 1 is fixedly mounted with a mounting track 6 and a linear guide rail 19. The rotating spindle box is arranged on the upper end surface of the device support 1, and the rotating spindle box comprises a spindle mounting box 2, a spindle 3, a workpiece positioning mechanism 4 and a spindle drive motor 5. The generator tube shell 11 to be processed is positioned by the workpiece positioning mechanism 4. The high-frequency heating system is mounted on the rotating spindle box, and the high-frequency heating system comprises a high-frequency heating system host and a heating head 21. The high-frequency heating system host is fixed on the device support 1, and the heating head 21 is positioned on the spindle mounting box 2 through the heating head support 22, and the bottom of the heating head 21 is arranged in a spiral shape. The sealing rotary cutter mechanism is arranged on the upper end surface of the device support 1. , and the sealing rotary knife mechanism includes a moving seat 14, a steering motor 15, a steering seat 16, a sealing motor 17 and a sealing cutter head 18. The spindle mounting box 2 is installed on the mounting track 6, and the spindle mounting box 2 is positioned by adjusting the positioning mechanism 7. The spindle 3 is rotatably mounted on the spindle mounting box 2 through the front ball bearing 8 and the rear ball bearing 9. The workpiece positioning mechanism 4 is fixed to the front side end of the spindle 3, and a driven pulley 10 is fixedly installed on the rear side end of the spindle 3. The spindle drive motor 5 is fixed on the side wall of the spindle mounting box 2, and a transmission pulley 12 is fixedly installed on the output shaft of the spindle drive motor 5. The transmission pulley 12 and the driven pulley 10 are connected by a transmission belt 13. When the spindle drive motor 5 and the sealing motor 17 are actually running, the contact surfaces of the sealing cutter head 18 and the generator tube shell 11 move toward each other.

[0039] The moving seat 14 is movably mounted on the linear guide rail 19, and the moving seat 14 is driven by the telescopic electric cylinder 20 on the equipment bracket 1, the steering motor 15 is fixedly mounted on the moving seat 14, one end of the steering seat 16 is fixedly connected to the output shaft of the steering motor 15, the sealing motor 17 is fixed to the other end of the steering seat 16, and the sealing cutter head 18 is fixed to the output shaft of the sealing motor 17. When the generator tube shell 11 is actually installed, the end of the generator tube shell 11 passes through the spiral part on the heating head 21, and when the steering seat 16 is in a horizontal state, the side of the sealing cutter head 18 is in contact with the outer end side wall of the generator tube shell 11. The sealing cutter head 18 is arranged close together, and after the steering seat 16 rotates counterclockwise by ninety degrees, the outer end of the generator tube shell 11 is bent and sealed by the sealing cutter head 18. The automobile airbag gas generator tube shell sealing equipment is arranged, which is composed of an equipment bracket 1, a rotating spindle box, a high-frequency heating system and a sealing rotary cutter mechanism. The sealing rotary cutter mechanism is arranged to be composed of a moving seat 14, a steering motor 15, a steering seat 16, a sealing motor 17 and a sealing cutter head 18. The sealing cutter head 18 is driven by the steering motor 15 to continuously shift the angle, thereby achieving a sealing effect on the port of the generator tube shell 11.

[0040] Embodiment 2: On the basis of embodiment 1, the workpiece positioning mechanism 4 includes a mounting seat 27, a clamping mechanism 28 and a front cover plate 29. A first-level piston chamber 30 is opened on the mounting seat 27, and a first-level air duct 31 is opened on the top surface of the first-level piston chamber 30. The front cover plate 29 is positioned on the mounting seat 27 by a screw structure, and the front cover plate 29 forms a seal for the first-level piston chamber 30. The clamping mechanism 28 is movably arranged in the first-level piston chamber 30. An air cavity 23 is opened on the main shaft 3, and a sealing member 24 is fixedly installed on the front side end of the air cavity 23. A main air duct 25 is opened on the sealing member 24, and a secondary air duct 26 is opened on the side wall of the main air duct 25. When the sealing member 24 is actually installed, the secondary air duct 26 is arranged opposite to the first-level air duct 31.

[0041] An air supply pipe 48 is rotatably installed at the rear port of the air cavity 23 through a sealed bearing 47. The air supply pipe 48 is a hard steel pipe, and the air supply pipe 48 is positioned on the rear wall of the spindle mounting box 2 through a pipe positioning seat 49, and the end of the air supply pipe 48 is connected to the air pump structure on the spindle mounting box 2. The clamping mechanism 28 includes a primary piston 33, a secondary piston 34 and a movable clamping seat 35. The primary piston 33 is movably arranged in the primary piston cavity 30, and a primary spring groove 32 is opened on the primary piston 33, and the bottom of the primary spring groove 32 is fixedly connected to the primary return spring 32, the primary piston 33 is provided with a secondary piston groove 36 and a movable groove, the secondary piston 34 is movably arranged in the secondary piston groove 36, and a piston hole is opened on the bottom surface of the secondary piston groove 36, the bottom surface of the secondary piston 34 is fixedly connected to a piston rod 38, the piston rod 38 is movably arranged in the piston hole, the secondary piston 34 is provided with a secondary spring groove, and the bottom of the secondary spring groove is fixedly connected to a secondary return spring 37.

[0042] The movable clamp seat 35 is movably arranged in the movable groove, and a three-stage spring groove is opened on the movable clamp seat 35, the bottom of the three-stage spring groove is fixedly connected with a support spring 40, and the outer end of the support spring 40 is fixedly connected to the bottom of the movable groove. When the primary return spring 32 is in the reset state, the primary piston 33 is in contact with the top surface of the primary piston chamber 30, and when the secondary return spring 37 is in the reset state, the lower side surface of the secondary piston 34 is in contact with the bottom surface of the secondary piston groove 36. When the support spring 40 is in the reset state, the lower half of the movable clamp seat 35 pops out to the outside of the movable groove, and the lower end surface of the movable clamp seat 35 is arranged in an arc shape, and the lower end surface of the movable clamp seat 35 The curvature value of the end face is consistent with the curvature value of the outer wall of the generator tube shell 11, a secondary air duct 41 is provided on the bottom surface of the secondary piston groove 36, and a tertiary air duct 42 is provided on the bottom surface of the tertiary spring groove. The secondary air duct 41 and the tertiary air duct 42 are connected by a steel bellows 43, and the steel bellows 43 is arranged to pass through the inner cavity of the support spring 40, an air chamber 44 is provided on the movable clamp seat 35, and the air chamber 44 is connected to the tertiary air duct 42, and an adsorption groove 46 is provided on the lower end surface of the movable clamp seat 35, and the adsorption groove 46 is connected to the air chamber 44 through the connecting air duct 45, and multiple groups of adsorption grooves 46 are evenly arranged on the lower end surface of the movable clamp seat 35.

[0043] The end of the piston rod 38 is fixedly connected with a force-bearing head 39. After the primary piston chamber 30 is inflated, the primary piston 33 moves inward, and at this time, the force-bearing heads 39 in three directions generate force, and then push the secondary piston 34 to move outward in the secondary piston groove 36, so that the secondary piston groove 36 is located in the lower half of the cavity of the secondary piston 34 to generate negative pressure, thereby generating negative pressure in the adsorption groove 46 to generate an adsorption positioning effect on the outer wall of the generator tube shell 11, by setting the workpiece positioning mechanism 4 to be composed of a mounting seat 27, a clamping mechanism 28 and a front cover plate 29, and setting the clamping mechanism 28 to be composed of a primary piston 33, a secondary piston 34 and a movable clamp seat 35, and opening a secondary piston groove 36 and a movable groove on the primary piston 33, and connecting the piston rod 3 to the bottom surface of the secondary piston 34. 8, so that when the first-stage piston 33 moves inward, a force is formed between the force-bearing heads 39 at the ends of the piston rod 38 in all directions, so that the second-stage piston 34 moves outward, thereby forming a suction effect, so that the adsorption groove 46 on the movable clamp seat 35 produces a negative pressure adsorption effect, and the clamping force and the negative pressure adsorption force work together to effectively ensure the positioning stability of the generator tube shell 11 by the workpiece positioning mechanism 4. When the generator tube shell 11 is actually installed, the inner end of the generator tube shell 11 is set against the side wall of the piston rod 38, and when the first-stage piston chamber 30 is in a pressure relief state, the force-bearing heads 39 are all set close to each other. The piston rod 38 can not only play a guiding role, but also pre-position the generator tube shell 11. A single structure can realize multiple functions, thereby achieving the purpose of optimizing the structural composition of the equipment.

[0044] Embodiment three: On the basis of embodiment two, a primary sealing gasket 50 is provided between the main shaft 3 and the sealing member 24, a secondary sealing gasket 51 is provided between the mounting seat 27 and the front cover plate 29, the primary piston 33 is formed by splicing two parts, and the splicing part is sealed, and a tertiary sealing gasket 54 is provided at the docking position of the secondary air duct 26 and the primary air duct 31. The sealing gasket is provided to improve the sealing between the structures, a sealing groove 52 is provided at the edge of the adsorption groove 46, and a metal sealing ring 53 is fixedly glued in the sealing groove 52. The metal sealing ring 53 can ensure the contact effect between the movable clamp seat 35 and the generator tube shell 11, thereby ensuring the adsorption stability of the adsorption groove 46.

[0045] Although the above describes the illustrative specific implementation methods of the present application so that technicians in this technical field can understand the present application, the present application is not limited to the scope of the specific implementation methods. For ordinary technicians in this technical field, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations using the concept of the present application are protected.

Claims

1. A tube shell sealing device for automobile airbag gas generator, characterized in that: include: An equipment bracket (1), wherein an installation rail (6) and a linear guide rail (19) are fixedly mounted on the upper end surface of the equipment bracket (1); A rotating spindle box, the rotating spindle box being arranged on the upper end surface of the equipment support (1), and comprising a spindle mounting box (2), a spindle (3), a workpiece positioning mechanism (4) and a spindle drive motor (5), and a generator tube shell (11) to be processed is positioned by the workpiece positioning mechanism (4); A high-frequency heating system, the high-frequency heating system being installed on a rotating spindle box, and the high-frequency heating system comprising a high-frequency heating system mainframe and a heating head (21), the high-frequency heating system mainframe being fixed on an equipment bracket (1), the heating head (21) being positioned on a spindle mounting box (2) via a heating head bracket (22), and the bottom of the heating head (21) being arranged in a spiral shape; A sealing rotary knife mechanism is provided on the upper end surface of the equipment support (1), and comprises a moving seat (14), a steering motor (15), a steering seat (16), a sealing motor (17) and a sealing knife head (18).

2. The automobile airbag gas generator shell sealing device according to claim 1, characterized in that: The spindle mounting box (2) is mounted on a mounting track (6), and the spindle mounting box (2) is positioned by adjusting a positioning mechanism (7). The spindle (3) is rotatably mounted on the spindle mounting box (2) through a front ball bearing (8) and a rear ball bearing (9). The workpiece positioning mechanism (4) is fixed to the front side end of the spindle (3), and a driven pulley (10) is fixedly mounted on the rear side end of the spindle (3). The spindle drive motor (5) is fixed to the side wall of the spindle mounting box (2), and a transmission pulley (12) is fixedly mounted on the output shaft of the spindle drive motor (5). The transmission pulley (12) and the driven pulley (10) are connected to each other through a transmission belt (13). When the spindle drive motor (5) and the sealing motor (17) are actually in operation, the contact surfaces of the sealing cutter head (18) and the generator tube shell (11) move toward each other.

3. The automobile airbag gas generator shell sealing device according to claim 2, characterized in that: The movable seat (14) is movably mounted on a linear guide rail (19), and the movable seat (14) is driven by a telescopic electric cylinder (20) on an equipment bracket (1); the steering motor (15) is fixedly mounted on the movable seat (14); one end of the steering seat (16) is fixedly connected to an output shaft of the steering motor (15); the sealing motor (17) is fixed to the other end of the steering seat (16); the sealing blade (18) is fixed to the output shaft of the sealing motor (17); when the generator tube shell (11) is actually installed, the end of the generator tube shell (11) passes through a spiral portion on the heating head (21); when the steering seat (16) is in a horizontal state, the side edge of the sealing blade (18) is arranged to be close to the outer end side wall of the generator tube shell (11); after the steering seat (16) rotates ninety degrees counterclockwise, the sealing blade (18) forms a bending and sealing effect on the outer end of the generator tube shell (11).

4. The automobile airbag gas generator shell sealing device according to claim 3, characterized in that: The workpiece positioning mechanism (4) comprises a mounting seat (27), a clamping mechanism (28) and a front cover plate (29); a primary piston chamber (30) is provided on the mounting seat (27); a primary air channel (31) is provided on the top surface of the primary piston chamber (30); the front cover plate (29) is positioned on the mounting seat (27) by a screw structure, and the front cover plate (29) forms a seal for the primary piston chamber (30); the clamping mechanism (28) is movably arranged in the primary piston chamber (30); an air chamber (23) is provided on the spindle (3); a sealing member (24) is fixedly installed at the front side end of the air chamber (23); a main air channel (25) is provided on the sealing member (24); a secondary air channel (26) is provided on the side wall of the main air channel (25); when the sealing member (24) is actually installed, the secondary air channel (26) is arranged in contact with the primary air channel (31).

5. The automobile airbag gas generator shell sealing device according to claim 4, characterized in that: An air supply pipe (48) is rotatably mounted at the rear port of the air cavity (23) via a sealing bearing (47); the air supply pipe (48) is a hard steel pipe, and the air supply pipe (48) is positioned on the rear wall of the spindle mounting box (2) via a pipe positioning seat (49), and the end of the air supply pipe (48) is connected to the air pump structure on the spindle mounting box (2).

6. The automobile airbag gas generator shell sealing device according to claim 5, characterized in that: The clamping mechanism (28) comprises a primary piston (33), a secondary piston (34) and a movable clamping seat (35); the primary piston (33) is movably arranged in the primary piston cavity (30); a primary spring groove (32) is provided on the primary piston (33); a primary return spring (32) is fixedly connected to the bottom of the primary spring groove (32); a secondary piston groove (36) and a movable groove are provided on the primary piston (33); the secondary piston (34) is movably arranged in the secondary piston groove (36); a piston hole is provided on the bottom surface of the secondary piston groove (36); a piston rod (38) is fixedly connected to the bottom surface of the secondary piston (34); the piston rod (38) is movably arranged in the piston hole; a secondary spring groove is provided on the secondary piston (34); a secondary return spring (37) is fixedly connected to the bottom of the secondary spring groove.

7. The automobile airbag gas generator shell sealing device according to claim 6, characterized in that: The movable clamp seat (35) is movably arranged in the movable groove, and a three-stage spring groove is opened on the movable clamp seat (35). The bottom of the three-stage spring groove is fixedly connected with a support spring (40), and the outer end of the support spring (40) is fixedly connected to the bottom of the movable groove. When the first-stage reset spring (32) is in the reset state, the first-stage piston (33) is in contact with the top surface of the first-stage piston cavity (30). When the second-stage reset spring (37) is in the reset state, the lower side surface of the second-stage piston (34) is in contact with the bottom surface of the second-stage piston groove (36). When the support spring (40) is in the reset state, the lower half of the movable clamp seat (35) pops out to the outside of the movable groove. The lower end surface of the movable clamp seat (35) is arranged in an arc shape, and the curvature value of the lower end surface of the movable clamp seat (35) is consistent with the curvature value of the outer wall of the generator tube shell (11).

8. The automobile airbag gas generator shell sealing device according to claim 7, characterized in that: The bottom surface of the secondary piston groove (36) is provided with a secondary air passage (41), and the bottom surface of the tertiary spring groove is provided with a tertiary air passage (42). The secondary air passage (41) and the tertiary air passage (42) are connected by a steel bellows (43), and the steel bellows (43) is arranged to pass through the inner cavity of the support spring (40). The movable clamp seat (35) is provided with an air chamber (44), and the air chamber (44) is connected to the tertiary air passage (42). The lower end surface of the movable clamp seat (35) is provided with an adsorption groove (46), and the adsorption groove (46) is connected to the air chamber (44) through the connecting air passage (45), and a plurality of adsorption grooves (46) are evenly arranged on the lower end surface of the movable clamp seat (35).

9. The automobile airbag gas generator shell sealing device according to claim 8, characterized in that: The end of the piston rod (38) is fixedly connected with a force-bearing head (39). After the first piston chamber (30) is inflated, the first piston (33) moves inward, and at this time, the force-bearing heads (39) in three directions generate force, and then push the second piston (34) to move outward in the second piston groove (36), so that the second piston groove (36) is located in the lower half of the second piston (34) The cavity generates negative pressure, thereby generating negative pressure in the adsorption groove (46), so as to generate an adsorption positioning effect on the outer wall of the generator tube shell (11). When the generator tube shell (11) is actually installed, the inner side end of the generator tube shell (11) is set against the side wall of the piston rod (38), and when the first piston chamber (30) is in a pressure relief state, the force-bearing heads (39) are all set close to each other.

10. The automobile airbag gas generator shell sealing device according to claim 9, characterized in that: A primary sealing gasket (50) is provided between the main shaft (3) and the sealing member (24), a secondary sealing gasket (51) is provided between the mounting seat (27) and the front cover plate (29), the primary piston (33) is formed by splicing two parts, and the splicing part is sealed, a tertiary sealing gasket (54) is provided at the docking position of the secondary air channel (26) and the primary air channel (31), a sealing groove (52) is provided at the edge of the adsorption groove (46), and a metal sealing ring (53) is fixedly glued in the sealing groove (52).

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