Automatic welding device for automobile G78 iron frame stamping nut

Abstract

The utility model discloses an automatic welding device of automobile G78 iron frame stamping part nut, including double -deck sliding table, be provided with two welding tooling on the double -deck sliding table, two welding tooling pass through the translation drive of double -deck sliding table, realize the synchronous continuous switching of automatic welding and feeding, the welding manipulator is equipped with two, two welding manipulators are respectively arranged in the both sides of double -deck sliding table, the welding tongs are arranged in the free end of welding manipulator, the welding tongs are connected automatic welding machine, are used for through welding manipulator to the automobile G78 iron frame stamping part on welding tooling and the automatic projection welding of the nut to be welded is carried out, realizes welding operation and feeding synchronization, eliminates the process empty window period, promotes production efficiency, constructs double -deck nut mistake prevention mechanism, avoids the wrong placement and the missing welding of specification, improves product pass rate, reduces artificial dependence, reduces manual labor intensity and labor cost.

Description

Technical Field

[0001] This utility model belongs to the field of automatic welding technology, specifically relating to an automatic welding device for nuts of stamped iron frame parts for automobiles G78. Background Technology

[0002] The welding of nuts on the G78 automotive steel frame stamping parts involves the stamping parts, 17 M6 welding square nuts, and 8 M5 welding square nuts. The existing welding equipment for these nuts uses a medium-frequency inverter spot welding machine. The nuts are placed in the designated positions by manually holding the G78 steel frame stamping part, and then the switch is pressed to complete the welding. Since the G78 steel frame stamping part is approximately 2200mm long and 1300mm wide, it requires four people to lift and operate it during production, which presents the following problems: 1. High labor costs: The need for multiple people to work together directly increases labor costs; 2. Product Deformation Risk: Uneven stress during the welding process of the G78 automotive iron frame stamping parts, which are manually lifted, can easily lead to deformation of the G78 automotive iron frame stamping parts. 3. Potential welding quality issues: The iron frame requires the welding of 25 nuts (including M6 and M5 specifications). Manual operation can easily lead to missed welds or incorrect placement of nuts (M5 and M6 positions are confused), resulting in defective parts and reducing product quality. Therefore, we propose an automatic welding device for nuts on stamped steel frames of automobiles, specifically for G78 models. Utility Model Content

[0003] The purpose of this utility model is to provide an automatic welding device for nuts of stamped steel frame parts for automobiles G78, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an automatic welding device for nuts on stamped steel frames of automobiles (G78), comprising: A double-layer slide table is provided with two welding fixtures. The welding fixtures hold stamped parts of the G78 steel frame of automobiles and nuts to be welded. The two welding fixtures are driven by the translation of the double-layer slide table to realize the synchronous and continuous switching of automatic welding and loading and unloading. A welding robot arm, wherein two welding robots arm are provided, and the two welding robots arm are respectively arranged on both sides of the double-layer slide table; A welding clamp is provided at the free end of the welding robot. The welding clamp is connected to an automatic welding machine and is used to automatically projectile weld the automotive G78 iron frame stamping and the nut to be welded on the welding fixture by the welding robot.

[0005] Preferably, the welding fixture includes a fixture base plate, a cylinder clamping and fixing assembly, and a nut anti-misalignment assembly; The tooling base plate is set on the double-layer slide table. Several cylinder clamping and fixing components are provided. Several cylinder clamping and fixing components are respectively set on the tooling base plate on the outer side of the automotive G78 iron frame stamping part, and are used to press and fix the automotive G78 iron frame stamping part. The nut anti-misalignment assembly consists of 25 units, which are respectively installed on the tooling base plate at the 25 nut holes corresponding to the stamped iron frame of the G78 automobile.

[0006] Preferably, the cylinder clamping and fixing assembly includes a clamping cylinder and a clamping caliper; The clamping cylinder is mounted on the tooling base plate, and the clamping caliper is mounted on the output end of the clamping cylinder. The inner side of the clamping caliper matches the outer side of the automotive G78 iron frame stamping part. The clamping cylinder drives the clamping caliper to press the automotive G78 iron frame stamping part.

[0007] Preferably, the nut anti-misoperation component includes a support base, a nut insulating pin, and a nut identification mark; The support base is disposed on the tooling base plate at the nut hole corresponding to the stamped part of the automotive G78 iron frame. The nut insulating pin is disposed on the support base, and the nut distinguishing mark is disposed on the support base on the outside of the nut insulating pin.

[0008] Preferably, the nut insulating pin has two sizes: one size is suitable for M5 welding square nuts, and the other size is suitable for M6 welding square nuts. When the nut specification does not match the size of the nut insulating pin, the nut cannot be installed into the nut insulating pin, thus preventing incorrect nut specification.

[0009] Preferably, the nuts are distinguished by prominent markings of different colors, which are placed on the support base on the outer side corresponding to the insulating pin of the nut, to distinguish the placement positions of M5 nuts and M6 nuts.

[0010] Preferably, the tooling base plate is also provided with a reference positioning post for positioning and placing the automotive G78 iron frame stamping part.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. Significantly improved production efficiency: The synchronous switching of the double-layer slide table allows welding operations to completely overlap with loading and unloading operations, eliminating the waiting window period of the existing welding equipment, reducing the processing time of a single batch of workpieces by more than 50%, and greatly improving overall production capacity. 2. Improved welding quality and stability: The reference positioning column works in conjunction with the cylinder clamping and fixing assembly to ensure the workpiece positioning accuracy and stability during the welding process, reduce the risk of workpiece deformation, and control the welding position deviation within ±0.1mm; The nut anti-misplacement component employs a dual mechanism of physical and color-coded anti-misplacement, completely eliminating the problems of incorrect nut specifications and incomplete welding, reducing the product defect rate from 8%-10% in traditional processes to below 0.5%. 3. Reduced labor costs and labor intensity: Traditional processes require human assistance to lift workpieces, while this device only requires 2 people to complete loading and unloading (1 person assists in placing the workpiece, and 1 person places the nut), reducing labor costs by 50%, and eliminating the need for manual lifting of heavy objects and precise alignment, thus significantly reducing labor intensity; 4. Strong process adaptability: The combination of welding clamp and welding robot is adapted to projection welding process. It is specially improved for the large size characteristics of automotive G78 iron frame stamping parts, which solves the technical problem that traditional equipment cannot adapt to the automatic welding of large-sized workpieces. Moreover, the device has a simple structure, and all components are conventional and mature parts, resulting in low maintenance costs and long service life. Attached Figure Description

[0012] Figure 1 This is a top view of the overall structure of this utility model; Figure 2 This is a top view schematic diagram of the placement of the welding fixture and the stamped steel frame of the G78 automobile of this utility model. Figure 3 This is a three-dimensional structural diagram of the welding fixture of this utility model; Figure 4 This is a three-dimensional structural diagram of the welding fixture of this utility model; Figure 5 This is a top view of the welding fixture of this utility model.

[0013] In the diagram: 1-Double-layer slide table, 2-Welding fixture, 201-Fitting fixture base plate, 202-Cylinder clamping and fixing assembly, 2021-Clamping cylinder, 2022-Clamping caliper, 203-Nut error prevention assembly, 2031-Support base, 2032-Nut insulating pin, 2033-Nut identification mark, 204-Reference positioning post, 3-Automotive G78 iron frame stamping part, 4-Welding robot, 5-Welding clamp. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figures 1-5The automatic welding device for nuts of stamped steel frame parts for automobiles G78 provided by this utility model includes a double-layer slide table 1, a welding robot 4, and a welding clamp 5, wherein: Double-layer slide table 1: As the load-bearing and switching mechanism of the device, it is equipped with two independent welding fixtures 2 on its top. The two welding fixtures 2 are driven to move back and forth along the track by translation drive components (such as cylinder or motor drive) to realize the synchronous switching mode of welding one fixture and loading / unloading the other fixture. Welding robot 4: Two are set up and symmetrically arranged on both sides of the double-layer slide table 1. The free end of the robot is fixedly connected to the welding clamp 5. Under the control of the preset program, it can move precisely to the welding station to complete the nut projection welding operation. Welding clamp 5: Installed on the free end of welding robot 4, connected to an external automatic welding machine (including welding power supply and cooling system), specially adapted to the projection welding process of nuts for G78 iron frame stamping parts, and can achieve precise welding of nuts in different positions through the drive of the robot. Welding fixture 2: This is a key component ensuring workpiece positioning accuracy, welding stability, and nut error prevention. It includes fixture base plate 201, cylinder clamping and fixing assembly 202, nut error prevention assembly 203, and reference positioning post 204. Tooling base plate 201: As the basic load-bearing structure of the welding tooling, it is fixedly installed on the double-layer slide table 1 to provide an installation reference for other components. Its size is adapted to the 2200mm long and 1300mm wide specifications of the automotive G78 iron frame stamping part 3, ensuring the overall flatness of the workpiece after placement. The cylinder clamping and fixing assembly 202 consists of a clamping cylinder 2021 and a clamping caliper 2022, with several units provided (arranged to fit the outline of the iron frame). All are mounted on the tooling base plate 201 at the outer position corresponding to the outer side of the automotive G78 iron frame stamping part 3. The clamping cylinder 2021 serves as the power source, and the inner contour of the clamping caliper 2022 matches the outer shape of the automotive G78 iron frame stamping part 3. When the automotive G78 iron frame stamping part 3 is positioned, the clamping cylinder 2021 drives the clamping caliper 2022 to clamp the workpiece, preventing workpiece displacement during welding and ensuring welding accuracy. Nut error prevention components 203: A total of 25 components are provided, each corresponding to one of the 25 nut holes on the G78 steel frame stamping part 3 of the automobile (17 corresponding to M6 nuts and 8 corresponding to M5 nuts). Each nut error prevention component 203 includes a support base 2031, a nut insulating pin 2032, and a nut identification mark 2033. The support base 2031 is fixed on the tooling base plate 201 and is used to support the nut insulating pin 2032. The nut insulating pin 2032 is vertically installed on the top of the support base 2031 and has two matching sizes: one for M5 weld square nuts and the other for M6 weld square nuts. When the nut specification does not match the insulating pin size, the nut cannot be installed, thus achieving physical error prevention. The nut identification mark 2033 is a conspicuous mark of different colors (e.g., red for M5 nuts and blue for M6 nuts), which is set on the outside of the support base 2031 for manual quick identification of the nut placement position, assisting in error prevention. Reference positioning post 204: It is fixedly installed on the key positioning point of the tooling base plate 201. Its number and position are designed according to the contour features of the automotive G78 iron frame stamping part 3. When the workpiece is placed, the reference positioning post 204 fits with the positioning hole or positioning edge on the workpiece to achieve rapid and accurate positioning of the workpiece and reduce manual alignment time.

[0016] The method of using the automatic welding device for nuts of stamped parts of G78 automotive steel frames provided by this utility model: 1. Initial state: The two welding fixtures 2 on the double-layer slide table 1 are respectively in the welding position (inside the workstation) and the loading / unloading position (outside the workstation). The fixture in the welding position has completed the clamping of the workpiece and the nut. 2. Welding and material loading / unloading are carried out simultaneously: Welding side: Two welding robots 4 drive the welding gun 5 to move according to the preset program, and automatically project the 25 nuts on the welding position tooling one by one. The automatic welding machine connected to the welding gun 5 provides welding power, and the cooling system cools the welding gun at the same time to ensure welding stability. Loading and unloading side: The operator operates on the tooling at the loading and unloading position. The automotive G78 iron frame stamping part 3 is quickly positioned on the tooling base plate 201 by the reference positioning column 204. According to the color indication of the nut identification mark 2033, the corresponding specification nut (M5 or M6) is installed into the matching size nut insulating pin 2032. After completion, the cylinder clamping and fixing assembly 202 is activated, and the clamping caliper 2022 clamps the workpiece and waits for switching. 3. Tooling switching: After the welding operation at the welding position is completed, the welding robot 4 is reset to the safe position, and the translation drive component of the double-layer slide table 1 is started, which moves the welding completed tooling out to the loading and unloading position, and at the same time moves the tooling that has completed loading and unloading into the welding position. The switching time only takes 3-5 seconds. 4. Cyclic operation: The tooling newly moved into the welding position starts the welding program, while the tooling at the loading and unloading position releases the clamping clamp 2022, and the welded finished product is manually removed. The loading and unloading operation in step 2 is repeated to achieve continuous production without downtime.

[0017] This utility model has the following significant beneficial effects: 1. Significantly improved production efficiency: The synchronous switching of the double-layer slide 1 allows welding operations to completely overlap with loading and unloading operations, eliminating the waiting window period of the existing welding equipment, reducing the processing time of a single batch of workpieces by more than 50%, and greatly improving overall production capacity. 2. Improved welding quality and stability: The reference positioning post 204 cooperates with the cylinder clamping and fixing assembly 202 to ensure the positioning accuracy of the workpiece and the stability during the welding process, reduce the risk of workpiece deformation, and control the welding position deviation within ±0.1mm; The nut error prevention component 203 employs a dual mechanism of physical error prevention and color-coded error prevention, completely eliminating the problems of incorrect nut placement and incomplete welding, reducing the product defect rate from 8%-10% in traditional processes to below 0.5%. 3. Reduced labor costs and labor intensity: Traditional processes require 4 people to lift the workpiece, while this device only requires 2 people to complete the loading and unloading (1 person assists in placing the workpiece, and 1 person places the nut), reducing labor costs by 50%, and eliminating the need for manual lifting of heavy objects and precise alignment, thus significantly reducing labor intensity. 4. Strong process adaptability: The combination of welding clamp 5 and welding robot 4 is adapted to projection welding process. It is specially improved for the large size characteristics of automotive G78 iron frame stamping parts, which solves the technical problem that traditional equipment cannot adapt to the automatic welding of large-sized workpieces. Moreover, the device has a simple structure, and all components are conventional and mature parts, resulting in low maintenance costs and long service life.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic welding device for nuts on stamped steel frames of automobiles (G78), characterized in that, include: A double-layer slide table (1) is provided with two welding fixtures (2). The welding fixtures (2) are provided with a stamped part (3) of the iron frame of automobile G78 and a nut to be welded. The two welding fixtures (2) are driven by the translation of the double-layer slide table (1) to realize automatic welding and synchronous and continuous switching of loading and unloading. Welding robot (4), two welding robot (4) are provided, and the two welding robot (4) are respectively arranged on both sides of the double-layer slide (1); Welding clamp (5), the welding clamp (5) is set at the free end of the welding robot (4), the welding clamp (5) is connected to an automatic welding machine, and is used to automatically project weld the automobile G78 iron frame stamping part (3) and the nut to be welded on the welding fixture (2) by the welding robot (4).

2. The automatic welding device for nuts of stamped steel frame parts for automobiles (G78) according to claim 1, characterized in that: The welding fixture (2) includes a fixture base plate (201), a cylinder clamping and fixing assembly (202), and a nut anti-misalignment assembly (203). The tooling base plate (201) is set on the double-layer slide table (1). There are several cylinder clamping and fixing components (202). Several cylinder clamping and fixing components (202) are respectively set on the tooling base plate (201) corresponding to the outer side of the automobile G78 iron frame stamping part (3) for pressing and fixing the automobile G78 iron frame stamping part (3). The nut anti-misalignment component (203) has 25 units, which are respectively set on the tooling base plate (201) at the 25 nut holes corresponding to the automotive G78 iron frame stamping part (3).

3. The automatic welding device for nuts of stamped steel frame parts for automobiles (G78) according to claim 2, characterized in that: The cylinder clamping and fixing assembly (202) includes a clamping cylinder (2021) and a clamping caliper (2022); The clamping cylinder (2021) is mounted on the tooling base plate (201), and the clamping caliper (2022) is mounted on the output end of the clamping cylinder (2021). The inner side of the clamping caliper (2022) matches the outer side of the automotive G78 iron frame stamping part (3). The clamping cylinder (2021) drives the clamping caliper (2022) to press the automotive G78 iron frame stamping part (3).

4. The automatic welding device for nuts of stamped steel frame parts for automobiles (G78) according to claim 2, characterized in that: The nut anti-misoperation component (203) includes a support base (2031), a nut insulating pin (2032), and a nut identification mark (2033). The support base (2031) is located on the tooling base plate (201) at the nut hole corresponding to the stamped part (3) of the automobile G78 iron frame. The nut insulating pin (2032) is located on the support base (2031). The nut distinguishing mark (2033) is located on the support base (2031) on the outside of the nut insulating pin (2032).

5. The automatic welding device for nuts of stamped steel frame parts for automobiles (G78) according to claim 4, characterized in that: The nut insulating pin (2032) has two sizes: one size is suitable for M5 welding square nuts, and the other size is suitable for M6 welding square nuts. When the nut specification does not match the size of the nut insulating pin (2032), the nut cannot be installed into the nut insulating pin (2032), thus achieving nut specification error prevention.

6. The automatic welding device for nuts of stamped steel frame parts for automobiles (G78) according to claim 4, characterized in that: The nut differentiation mark (2033) is a conspicuous mark of a different color, which is set on the support base (2031) on the outside of the nut insulating pin (2032) to distinguish the placement position of M5 nuts and M6 nuts.

7. The automatic welding device for nuts of stamped steel frame parts for automobiles (G78) according to claim 2, characterized in that: The tooling base plate (201) is also provided with a reference positioning post (204) for positioning and placing the automotive G78 iron frame stamping part (3).

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