A bumper flexible punching, sticking and welding assembly system

Abstract

The present invention provides a bumper flexible punching, gluing, punching and welding assembly system, comprising: a mounting frame, a quick-change tool magazine mounted on the mounting frame, a quick-change tire membrane mechanism, a C-type punching knife, a quick-change plate and a six-axis servo robot arm; the quick-change tool magazine is used to place the C-type punching knife, and the quick-change tool magazine comprises: a tool magazine base, at least one set of holding racks arranged on the tool magazine base, and the C-type punching knife is placed on the holding rack; the quick-change tire membrane mechanism is used to hold the bumper, the C-type punching knife is used to punch the bumper, and the six-axis servo robot arm is used to replace the C-type punching knife and drive the C-type punching knife to punch; the advantages of the present invention are: it has the advantages of flexible tool grabbing, quick replacement of bottom molds, multiple combination modes, high stability, etc., and can meet the needs of punching and gluing bumpers of different shapes when new products are launched. It saves manufacturing cycle and reduces manufacturing costs. Universal equipment corresponds to tire molds of multiple products and realizes the processing of multiple products.

Description

Technical Field

[0001] The present invention relates to the technical field of bumper punching, and particularly relates to a flexible punching, gluing and welding assembly system for bumpers. Background Art

[0002] An automobile bumper is a safety device that absorbs and mitigates external impact forces and protects the front and rear parts of the vehicle body. Components such as liners, fog lights, fenders, wire harnesses, radars, and decorative strips need to be installed on the front bumper of the vehicle.

[0003] Currently, the assembly radar punching and bonding equipment used in factories are all dedicated equipment. One product corresponds to one punching and bonding machine. When the dedicated machine has a production task, it is in an overloaded state, and when there is no production task, it is in an idle state. The current radar punching and bonding equipment not only wastes the working area but also wastes labor.

[0004] The applicant applied for a Chinese patent in 2018 for a flexible punching system with the publication number CN109571630A. This system realizes flexible tool changing and punching as well as the replacement of tooling through the cooperation of a punching tool quick change mechanism, a three-dimensional storage library for bumper tooling, and a manipulator. During use, this system can perform flexible tool changing. However, due to structural limitations, each time the tool is changed, manual entry into the equipment is required to manually disassemble and replace the "quick change bodies for respectively clamping and installing the punching die female body and the punching die male body" on the C-shaped punching pliers. This situation not only affects the production rhythm (each replacement takes more than half an hour) but also there has been a phenomenon of workers being injured during replacement. Currently, this flexible punching system can only be used for the production of bumpers at EOP (post-line bumper production). Due to the structural reasons of this C-shaped punching pliers, it is not applicable to the production of bumpers at SOP (mass production). Summary of the Invention

[0005] In view of the above problems, the purpose of the present invention is to provide a flexible punching, gluing and welding assembly system for bumpers, which is used to meet the requirements of punching and gluing different-shaped bumpers when new products are launched on the basis of the production of bumpers at SOP (mass production), so as to overcome the above-mentioned deficiencies of the prior art.

[0006] The flexible punching, gluing and welding assembly system for bumpers provided by the present invention includes: a mounting frame, a quick change tool magazine mounted on the mounting frame, a quick change die mechanism, a C-shaped punching tool, a quick change disk, and a six-axis servo robotic arm;

[0007] The quick change tool magazine is used to place the C-shaped punching tool. The quick change tool magazine includes: a tool magazine base, at least one set of placing racks arranged on the tool magazine base, and the C-shaped punching tool is placed on the placing racks;

[0008] The quick-change die mechanism is used to hold the bumper. The quick-change die mechanism includes: a connecting plate, a quick-change die installed on the connecting plate, a pneumatic quick-connect mechanism and an electrical quick-connect mechanism for fixedly connecting the connecting plate to the installation rack. The pneumatic quick-connect mechanism includes: a pneumatic quick-connect base installed on the installation rack, a first push plate slidably connected to the pneumatic quick-connect base, a first baffle fixedly connected to the connecting plate, a first cylinder for pushing the first push plate towards the first baffle, a positioning post fixedly connected to the first push plate, and a positioning sleeve fixedly connected to the first baffle. By engaging the positioning post in the positioning sleeve, the connecting plate is snap-connected to the installation rack. The electrical quick-connect mechanism includes: an electrical quick-connect base installed on the installation rack, a second push plate slidably connected to the pneumatic quick-connect base, a second baffle fixedly connected to the connecting plate, a second cylinder for pushing the second push plate towards the second baffle, a locking block fixedly connected to the second push plate, and a locking groove fixedly connected to the second baffle. By locking the locking block in the locking groove, the connecting plate is snap-connected to the installation rack.

[0009] The C-shaped punching tool is used to punch holes in the bumper. The C-shaped punching tool includes: a C-shaped pliers body, a cylinder rack for installing a pneumatic-hydraulic intensifying cylinder fixedly connected to the head position of the C-shaped pliers body, a pneumatic-hydraulic intensifying cylinder installed on the cylinder rack, a punch buffer rack installed below the pneumatic-hydraulic intensifying cylinder, a punch connected to the free end of the piston rod of the pneumatic-hydraulic intensifying cylinder, a punching table fixedly connected to the tail position of the C-shaped pliers body, the punching table being installed directly below the punch, and a quick-change disk mounting seat fixedly connected to the back of the C-shaped pliers body.

[0010] The quick-change disk includes: a female disk installed on the quick-change disk mounting seat, a male disk installed on the free end of a six-axis servo robotic arm, positioning holes provided on the female disk, and male disk positioning posts provided on the male disk. The male disk positioning posts of the male disk are inserted into the positioning holes of the female disk, and the six-axis servo robotic arm is connected to the C-shaped pliers body through the quick-change disk.

[0011] The six-axis servo robotic arm is used for replacing the C-shaped punching tool and driving the C-shaped punching tool to punch holes.

[0012] Preferably, two sets of quick-change die mechanisms are respectively installed on both sides of the installation rack, and the quick-change tool magazine and the six-axis servo robotic arm are installed on the installation rack between the two sets of quick-change die mechanisms.

[0013] Preferably, the air quick-connect mechanism includes: an air quick-connect base, a first cylinder, a first push plate, a first baffle, a buffer plate, and a spring. The air quick-connect base is installed on the installation frame near the connecting plate. A guide rail is provided on the air quick-connect base, and a chute is provided at the bottom of the first push plate. The first push plate slides on the guide rail through the chute. The first cylinder is installed on the air quick-connect base, and the piston rod of the first cylinder is fixedly connected to the first push plate. The first cylinder pushes the first push plate to slide on the guide rail. The first baffle is installed on the connecting plate. The buffer plate is installed on the first baffle through two groups of bolts. A spring is sleeved on the bolts between the buffer plate and the first baffle. A positioning post is provided on the first push plate, and a positioning sleeve is provided on the buffer plate. The first cylinder pushes the first push plate to move towards the first baffle, and the positioning post on the first push plate is clamped in the positioning sleeve on the buffer plate.

[0014] Preferably, the electric quick-connect mechanism includes: an electric quick-connect base, a second cylinder, a second push plate, a second baffle, a second buffer plate, and a second spring. The electric quick-connect base is installed on the installation frame near the connecting plate. A guide rail is provided on the electric quick-connect base, and a chute is provided at the bottom of the second push plate. The second push plate slides on the guide rail through the chute. The second cylinder is installed on the electric quick-connect base, and the piston rod of the second cylinder is fixedly connected to the second push plate. The second cylinder pushes the second push plate to slide on the guide rail. The second baffle is installed on the connecting plate. The second buffer plate is installed on the second baffle through two groups of bolts. A second spring is sleeved on the bolts between the second buffer plate and the second baffle. A locking block is provided on the second push plate, and a locking groove is provided on the second buffer plate. The second cylinder pushes the second push plate to move towards the second baffle, and the locking block on the second push plate is locked in the locking groove.

[0015] Preferably, the punch buffer frame includes: a guide block, a fixing bolt, a buffer block, and a third spring. The guide block is fixedly connected to the head position of the C-type clamp body and is located directly below the air-liquid intensifying cylinder. A cylinder through-hole is provided on the guide block, and the piston rod of the air-liquid intensifying cylinder passes through the cylinder through-hole. Two groups of fixing bolts are threadedly connected to the bottom of the guide block and are parallel to the piston rod. The buffer block is installed below the guide block through two groups of fixing bolts. A third spring is sleeved on the fixing bolts between the buffer block and the guide block.

[0016] Preferably, a heating system for heating the C-type punch and the product is further included. The heating system consists of a punch heating mechanism and a product heating mechanism. The punch heating mechanism includes: a heating tube and a thermocouple. Installation holes for installing the heating tube and the thermocouple are provided on the C-type punch, and the heating tube and the thermocouple are installed in the installation holes. The product heating mechanism consists of a heating air gun and an installation bracket. The installation bracket is installed on the installation frame near the quick-change die mechanism, and the heating air gun is installed on the installation bracket.

[0017] Preferably, a horizontal displacement mechanism and a vertical displacement mechanism are provided on the mounting bracket. The vertical displacement mechanism is installed on the slider of the horizontal displacement mechanism, and the heating air gun is installed on the slider of the horizontal displacement mechanism.

[0018] The advantages and positive effects of the present invention are as follows:

[0019] 1. The present invention has the advantages of flexible tool grasping, quick bottom die replacement, multiple combination methods, high stability, etc., and can meet the requirements of punching and sticking bumpers with different shapes when new products are launched. It saves the manufacturing cycle, reduces the manufacturing cost, and the general equipment can correspond to multiple product tire molds to realize the processing of multiple products.

[0020] 2. According to the characteristics of different positions of the radar brackets of different products, for different structural bumpers, the present invention designs and manufactures tire molds that can bond / weld the radar brackets. The tire molds have a quick change function. After the operator withdraws the original tire mold and places the new tire mold in the designated position, only need to click the one-key mold change button, and the whole mold change process can be completed within 180 seconds. For different products, only need to select different combination methods to complete the robot trajectory switching work.

[0021] 3. Considering the cold climate in winter in the Northeast, the present invention sets heating tubes for the punching head and establishes a punching pre-heating system. The whole heating system includes two parts: punch heating and product heating. For punch heating, high-quality heating tubes and thermocouples are embedded in the punch mounting holes, and are fixed by screws on the side. The temperature is fed back by the thermocouple and can be intelligently adjusted for the heating time and temperature through the PLC program. The product heating device consists of a heating air gun and a mounting bracket. The air gun is an industrial high-temperature air gun, and the air gun is intelligently controlled to turn on and off power through the PLC program; the mounting bracket is fixed on the side of the product appearance surface and is made of aluminum alloy 6061 (surface anodized), with functions such as adjustable in the X and Y directions and adjustable in angle to meet different installation position and angle requirements.

[0022] 4. The quick change tire mold mechanism of the present invention can quickly replace the corresponding tire molds for bumpers of multiple vehicle models. The tire molds are often transported to the connecting plate by a transporter, and the air quick plug mechanism and the electrical quick plug mechanism can quickly position and clamp the tire molds.

[0023] 5. The integrated structure design of the tool and the C-type clamp of the present invention can ensure high strength and long-term operation, and there is no need to manually replace the tool inside the equipment. Description of the Drawings

[0024] By referring to the following description in conjunction with the drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more apparent and easier to understand. In the drawings:

[0025] Figure 1It is a front view of the overall structure according to an embodiment of the present invention.

[0026] Figure 2 It is a front view of the quick-change tool magazine structure according to an embodiment of the present invention.

[0027] Figure 3 Schematic diagram of a C-type punching knife structure according to an embodiment of the present invention.

[0028] Figure 4 Schematic diagram of the quick-change disk structure according to an embodiment of the present invention.

[0029] Figure 5 Schematic diagram of the structure of the air quick-insert mechanism of the quick-change fetal membrane mechanism according to an embodiment of the present invention.

[0030] Figure 6 Schematic diagram of the structure of the electric quick plug mechanism of the quick-change fetal membrane mechanism according to an embodiment of the present invention.

[0031] Figure 7 Schematic diagram of the ATI connecting plate structure of the quick-changing fetal membrane mechanism according to an embodiment of the present invention.

[0032] Figure 8 It is a front view of the structure of the gas quick-insert mechanism according to an embodiment of the present invention.

[0033] Figure 9 It is a front view of the electric quick plug mechanism structure according to an embodiment of the present invention.

[0034] The accompanying drawings include: mounting frame 1, quick-change tool magazine 2, tool magazine base 2-1, holding rack 2-2, quick-change membrane mechanism 3, connecting plate 3-1, C-type punch 4, C-type clamp body 4-1, gas-liquid booster cylinder 4-2, cylinder frame 4-3, punch buffer frame 4-4, guide block 4-4-1, fixing bolt 4-4-2, buffer block 4-4-3, third spring 4-4-4, punch 4-5, punching table 4-6, quick-change disc mounting seat 4-7, quick-change disc 5, mother disc 5- 1. Sub-disc 5-2, positioning hole 5-3, sub-disc positioning column 5-4, six-axis servo robot arm 6, air quick-plug mechanism 7, air quick-plug base 7-1, first cylinder 7-2, first push plate 7-3, first baffle 7-4, buffer plate 7-5, spring 7-6, guide rail 7-7, electric quick-plug mechanism 8, electric quick-plug base 8-1, second cylinder 8-2, second push plate 8-3, second baffle 8-4, second buffer plate 8-5, second spring 8-6, guide rail 8-7, heating system 9. DETAILED DESCRIPTION

[0035] In the following description, for purposes of illustration, in order to provide a thorough understanding of one or more embodiments, numerous specific details are set forth. However, it is apparent that these embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

[0036] Figures 1-9 The overall structural schematic diagram according to an embodiment of the present invention is shown.

[0037] The bumper flexible punching, sticking and welding assembly system of the present invention includes: a mounting frame 1, a quick-change tool magazine 2 mounted on the mounting frame 1, a quick-change die mechanism 3, a C-shaped punching die 4, a quick-change disk 5, and a six-axis servo robotic arm 6;

[0038] The quick-change tool magazine 2 is used for placing the C-shaped punching die 4. The quick-change tool magazine 2 includes: a tool magazine base 2-1, six groups of storage racks 2-2 provided on the tool magazine base 2-1, and the C-shaped punching die 4 is placed on the storage racks 2-2. Two sets of quick-change die mechanisms 3 are respectively mounted on both sides of the mounting frame 1. The quick-change tool magazine 2 and the six-axis servo robotic arm 6 are mounted on the mounting frame 1 between the two sets of quick-change die mechanisms 3. The six-axis servo robotic arm 6 is used for replacing the C-shaped punching die 4 and driving the C-shaped punching die 4 to perform punching.

[0039] Refer to Figures 5-9 , the quick-change die mechanism 3 of the present invention is used for holding the bumper. The quick-change die mechanism 3 includes: a connecting plate 3-1, a quick-change die mounted on the connecting plate 3-1, a pneumatic quick-connect mechanism 7 and an electrical quick-connect mechanism 8 for fixedly connecting the connecting plate 3-1 to the mounting frame 1. The pneumatic quick-connect mechanism 7 includes: a pneumatic quick-connect base 7-1, a first cylinder 7-2, a first push plate 7-3, a first baffle 7-4, a buffer plate 7-5, and a spring 7-6. The pneumatic quick-connect base 7-1 is mounted on the mounting frame 1 near the connecting plate 3-1. A guide rail 7-7 is provided on the pneumatic quick-connect base 7-1. A chute is provided at the bottom of the first push plate 7-3. The first push plate 7-3 slides on the guide rail 7-7 through the chute. The first cylinder 7-2 is mounted on the pneumatic quick-connect base 7-1. The piston rod of the first cylinder 7-2 is fixedly connected to the first push plate 7-3. The first cylinder 7-2 pushes the first push plate 7-3 to slide on the guide rail 7-7. The first baffle 7-4 is mounted on the connecting plate 3-1. The buffer plate 7-5 is mounted on the first baffle 7-4 through two groups of bolts. A spring 7-6 is sleeved on the bolts between the buffer plate 7-5 and the first baffle 7-4. A positioning post is provided on the first push plate 7-3, and a positioning sleeve is provided on the buffer plate 7-5. The first cylinder 7-2 pushes the first push plate 7-3 towards the first baffle 7-4, and the positioning post on the first push plate 7-3 is clamped in the positioning sleeve on the buffer plate 7-5.

[0040] The electric quick-insert mechanism 8 includes: an electric quick-insert base 8-1, a second cylinder 8-2, a second push plate 8-3, a second baffle 8-4, a second buffer plate 8-5, and a second spring 8-6. The electric quick-insert base 8-1 is installed on the installation rack 1 near the connecting plate 3-1. A guide rail 8-7 is provided on the electric quick-insert base 8-1. A chute is provided at the bottom of the second push plate 8-3, and the second push plate 8-3 slides on the guide rail 8-7 through the chute. The second cylinder -2 is installed on the electric quick-insert base 8-1, and the piston rod of the second cylinder 8-2 is fixedly connected to the second push plate 8-3. The second cylinder 8-2 pushes the second push plate 8-3 to slide on the guide rail 8-7. The second baffle 8-4 is installed on the connecting plate 3-1. The second buffer plate 8-5 is installed on the second baffle 8-4 through two groups of bolts. A second spring 8-6 is sleeved on the bolts between the second buffer plate 8-5 and the second baffle 8-4. A locking block is provided on the second push plate 8-3, and a locking groove is provided on the second buffer plate 8-5. The second cylinder 8-2 pushes the second push plate 8-3 to move towards the second baffle 8-4, and the locking block on the second push plate 8-3 is locked in the locking groove.

[0041] Refer to Figure 3 , the C-shaped punching tool 4 of the present invention is used for punching the bumper. The C-shaped punching tool 4 includes: a C-shaped pliers body 4-1, a cylinder frame 4-3 fixedly connected to the head position of the C-shaped pliers body 4-1 for installing a gas-liquid booster cylinder 4-2, a gas-liquid booster cylinder 4-2 installed on the cylinder frame 4-3, a punch buffer frame 4-4 installed below the gas-liquid booster cylinder 4-2, a punch 4-5 connected to the free end of the piston rod of the gas-liquid booster cylinder 4-2, a punching table 4-6 fixedly connected to the tail position of the C-shaped pliers body 4-1, the punching table 4-6 is installed directly below the punch 4-5, and a quick-change disk mounting seat 4-7 is fixedly connected to the back of the C-shaped pliers body 4-1;

[0042] Refer to Figure 4 , the quick-change disk 5 of the present invention includes: a female disk 5-1 installed on the quick-change disk mounting seat 4-7, a male disk 5-2 installed on the free end of the six-axis servo robotic arm 6, positioning holes 5-3 and air source suction holes are provided on the female disk 5-1, a male disk positioning post 5-4 and air source suction holes are provided on the male disk 5-2, the male disk positioning post 5-4 of the male disk 5-2 is inserted into the positioning hole 5-3 of the female disk 5-1, and the six-axis servo robotic arm 6 is connected to the C-shaped pliers body 4-1 through the quick-change disk 5;

[0043] Refer to Figure 3, the punch buffer bracket 4-4 of the present invention includes: a guide block 4-4-1, fixing bolts 4-4-2, a buffer block 4-4-3, and a third spring 4-4-4. The guide block 4-4-1 is fixedly connected to the head position of the C-shaped clamp body 4-1 and is located directly below the air-liquid booster cylinder 4-2. A cylinder through hole is provided on the guide block 4-4-1, and the piston rod of the air-liquid booster cylinder 4-2 passes through the cylinder through hole. Two groups of fixing bolts 4-4-2 are threadedly connected to the bottom of the guide block 4-4-1 and are parallel to the piston rod. The buffer block 4-4-3 is installed below the guide block 4-4-1 through two groups of fixing bolts 4-4-2, and a third spring 4-4-4 is sleeved on the fixing bolts 4-4-2 between the buffer block 4-4-3 and the guide block 4-4-1.

[0044] Considering the cold climate in winter in Northeast China, a heating pipe technology is added to the punching head, and a punching preheating system is established. The heating system 9 includes: The heating system 9 consists of a punch heating mechanism and a product heating mechanism. The punch heating mechanism includes: a heating tube and a thermocouple. Installation holes for installing the heating tube and the thermocouple are provided on the C-shaped punch 4, and the heating tube and the thermocouple are installed in the installation holes. The product heating mechanism consists of a heating air gun and an installation bracket. The installation bracket is installed on the installation frame near the quick-change die mechanism, the heating air gun is installed on the installation bracket, and the installation bracket is provided with a horizontal displacement mechanism and a vertical displacement mechanism. The vertical displacement mechanism is installed on the slider of the horizontal displacement mechanism, and the heating air gun is installed on the slider of the horizontal displacement mechanism.

[0045] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A flexible punching, gluing and welding assembly system for a bumper, characterized in that include: Mounting frame, quick-change tool magazine mounted on the mounting frame, quick-change membrane mechanism, C-type punch, quick-change plate and six-axis servo robot arm; The quick-change tool magazine is used to place the C-shaped punching tool, and the quick-change tool magazine comprises: a tool magazine base, and at least one set of holding racks arranged on the tool magazine base, and the C-shaped punching tool is placed on the holding racks; The quick-change tire membrane mechanism is used to hold the bumper. The quick-change tire membrane mechanism includes: a connecting plate, a quick-change tire membrane installed on the connecting plate, an air quick-plug mechanism and an electric quick-plug mechanism that fix the connecting plate to the mounting frame. The air quick-plug mechanism includes: an air quick-plug base installed on the mounting frame, a first push plate slidably connected to the air quick-plug base, a first baffle plate fixedly connected to the connecting plate, a first cylinder that pushes the first push plate to move in the direction of the first baffle plate, a positioning column fixedly connected to the first push plate, and a positioning sleeve fixedly connected to the first baffle plate. The connecting plate is clamped on the mounting frame by clamping the positioning column in the positioning sleeve; the electric quick-plug mechanism includes: an electric quick-plug base installed on the mounting frame, a second push plate slidably connected to the air quick-plug base, a second baffle plate fixedly connected to the connecting plate, a second cylinder that pushes the second push plate to move in the direction of the second baffle plate, a locking block fixedly connected to the second push plate, and a locking groove fixedly connected to the second baffle plate. The connecting plate is clamped on the mounting frame by locking the locking block in the locking groove. The C-type punch is used to punch holes in the bumper, and the C-type punch includes: a C-type clamp body, a cylinder frame fixedly connected to the head position of the C-type clamp body for installing a gas-liquid booster cylinder, a gas-liquid booster cylinder installed on the cylinder frame, a punch buffer frame installed below the gas-liquid booster cylinder, a punch connected to the free end of the gas-liquid booster cylinder piston rod, a punch platform fixedly connected to the tail position of the C-type clamp body, the punch platform is installed just below the punch, and a quick-change disc mounting seat is fixedly connected to the back of the C-type clamp body; The quick-change plate comprises: a mother plate mounted on a quick-change plate mounting seat, a sub-plate mounted on a free end of a six-axis servo robot arm, a positioning hole is provided on the mother plate, a sub-plate positioning column is provided on the sub-plate, and the sub-plate positioning column of the sub-plate is inserted into the positioning hole of the mother plate, and the six-axis servo robot arm is connected to the C-type clamp body through the quick-change plate; The six-axis servo robot arm is used for replacing the C-shaped punching tool and driving the C-shaped punching tool to punch holes; The gas quick-insert mechanism comprises: a gas quick-insert base, a first cylinder, a first push plate, a first baffle, a buffer plate, and a spring. The gas quick-insert base is installed on a mounting frame near the connecting plate. A guide rail is provided on the gas quick-insert base, and a slide groove is provided at the bottom of the first push plate. The first push plate slides on the guide rail through the slide groove. The first cylinder is installed on the gas quick-insert base. The piston rod of the first cylinder is fixedly connected to the first push plate. The first cylinder pushes the first push plate to slide on the guide rail. The first baffle is installed on the connecting plate. The buffer plate is installed on the first baffle through two groups of bolts. The spring is sleeved on the bolts between the buffer plate and the first baffle. A positioning column is provided on the first push plate. A positioning sleeve is provided on the buffer plate. The first cylinder pushes the first push plate to move in the direction of the first baffle. The positioning column on the first push plate is clamped in the positioning sleeve on the buffer plate. The electric quick-plug mechanism includes: an electric quick-plug base, a second cylinder, a second push plate, a second baffle, a second buffer plate, and a second spring. The electric quick-plug base is installed on a mounting frame near the connecting plate. A guide rail is provided on the electric quick-plug base, and a slide groove is provided at the bottom of the second push plate. The second push plate slides on the guide rail through the slide groove. The second cylinder is installed on the electric quick-plug base. The piston rod of the second cylinder is fixedly connected to the second push plate. The second cylinder pushes the second push plate to slide on the guide rail. The second baffle is installed on the connecting plate. The second buffer plate is installed on the second baffle through two groups of bolts. The second spring is mounted on the bolts between the second buffer plate and the second baffle. A locking block is provided on the second push plate. A locking groove is provided on the second buffer plate. The second cylinder pushes the second push plate to move in the direction of the second baffle, and the locking block on the second push plate is locked in the locking groove.

2. The flexible punching, gluing and welding assembly system for a bumper according to claim 1, characterized in that, The two sets of quick-change membrane mechanisms are respectively installed on two sides of the mounting frame, and the quick-change tool magazine and the six-axis servo robot arm are installed on the mounting frame between the two sets of quick-change membrane mechanisms.

3. The flexible punching, sticking and welding assembly system for a bumper according to claim 1, wherein The punch buffer frame includes: a guide block, a fixing bolt, a buffer block, and a third spring. The guide block is fixedly connected to the head position of the C-type clamp body and is located directly below the gas-liquid booster cylinder. A cylinder through hole is opened on the guide block, and the piston rod of the gas-liquid booster cylinder passes through the cylinder through hole. Two groups of fixing bolts are threadedly connected to the bottom of the guide block and are parallel to the piston rod. The buffer block is installed below the guide block through the two groups of fixing bolts, and the third spring is mounted on the fixing bolt between the buffer block and the guide block.

4. A bumper flexible punching, sticking and welding assembly system according to claim 1, characterized in that It also includes a heating system for the C-shaped punching die and product heating. The heating system consists of a punching die heating mechanism and a product heating mechanism. The punching die heating mechanism includes: a heating tube and a thermocouple. Installation holes for installing the heating tube and the thermocouple are provided on the C-shaped punching die, and the heating tube and the thermocouple are installed in the installation holes. The product heating mechanism is composed of a heating air gun and an installation bracket. The installation bracket is installed on the installation frame near the quick-change die mechanism, and the heating air gun is installed on the installation bracket.

5. The flexible punching, gluing and welding assembly system for a bumper according to claim 4, wherein A horizontal displacement mechanism and a vertical displacement mechanism are provided on the installation bracket. The vertical displacement mechanism is installed on the slider of the horizontal displacement mechanism, and the heating air gun is installed on the slider of the horizontal displacement mechanism.

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