Automatic welding production line for key structural parts of excavator buckets

Abstract

The utility model provides an automatic welding production line for a key structural member of an excavator bucket, which comprises an RGV logistics system, an automatic welding production line and an automatic welding production line, the two feeding devices are arranged on the two sides of an inlet of the RGV logistics system correspondingly. The multiple welding manipulator workstations are arranged on the two sides of the RGV logistics system, and the multiple welding manipulator workstations are mutually independent; the discharging device is arranged on one side of an outlet of the RGV logistics system; the two material temporary storage devices are arranged on the two sides of the movable ground rail on the middle-rear section of the RGV logistics system. According to the utility model, the movable ground rail in the RGV logistics system is matched with the transport trolley, so that the workpieces can continuously flow between the welding stations, the manual carrying link is reduced, the productivity per day is improved by 2, and the productivity is improved by 20%; the two symmetrically-arranged feeding devices and the two material buffering devices form a physical buffering belt, and it is guaranteed that the takt time of the front section and the rear section of the production line is balanced.

Description

Technical Field

[0001] This utility model belongs to the field of engineering machinery structural component manufacturing technology, and specifically relates to an automated welding production line for key structural components of excavator buckets. Background Technology

[0002] Excavator buckets are wear parts of excavators, operating under harsh conditions and experiencing complex stress, requiring frequent replacement and thus in high demand across the industry.

[0003] The key structural component of the aforementioned bucket is the lug assembly. The lug assembly is one of the most important components of the bucket, forming a four-bar linkage with the boom and connecting rod. It works in conjunction with the boom movement to achieve feeding and unloading, and is a crucial unit for force transmission. Due to the diverse application scenarios and excavation needs of excavators, the demand for buckets of different models and sizes is enormous, resulting in a wide variety of lug assemblies. As a critical structural component of excavators that is easily worn and replaced, the market demand for buckets is characterized by: a wide variety of products in small batches.

[0004] As a critical structural component, the lug assembly currently relies heavily on robotic welding to ensure welding reliability and displacement control. Due to the specific market demands, diverse product models, rapid planning changes, and short delivery cycles, high demands are placed on process control and responsiveness. Simultaneously, material handling and program execution during manufacturing rely heavily on manual labor, frequently resulting in situations where equipment waits for workers, and workers wait for equipment. Furthermore, the on-site welding robots have been deployed gradually over several years, leading to inconsistent installation environments and the inability to directly copy welding programs, resulting in low overall equipment utilization. The wide variety of products also presents significant challenges in production planning, daily management, personnel product identification, tooling adjustments, and program execution. Summary of the Invention

[0005] The purpose of this utility model is to provide an automated welding production line for key structural components of excavator buckets, so as to realize the automated welding production of the support lug assembly.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An automated welding production line for key structural components of an excavator bucket includes:

[0008] An RGV logistics system consists of a mobile rail and RGV transport vehicles that travel on the mobile rail.

[0009] Two feeding devices are respectively installed on both sides of the entrance of the RGV logistics system;

[0010] Multiple welding robot workstations are arranged on both sides of the RGV logistics system, and the multiple welding robot workstations are independent of each other;

[0011] A blanking device is arranged at the outlet side of the RGV logistics system.

[0012] Two material buffering devices are arranged at the two sides of the movable track in the rear section of the RGV logistics system.

[0013] Further, the RGV transport trolley is provided with a telescopic fork mechanism, a lifting platform and a mechanical positioning device.

[0014] Further, the RGV transport trolley is provided with an anti-collision sensor, a photoelectric detection switch, an over-travel detection switch and a mechanical limiting device, and the vehicle body is provided with a sound and light alarm display lamp.

[0015] Further, the feeding device comprises an empty tray receiving position, an empty tray placing position, a feeding position and a waiting transfer position connected in sequence, and each position is provided with a feeding tray.

[0016] Further, the welding manipulator workstation is provided with a manipulator workstation control box, and the control box is provided with a mode switching knob and an independent power switch.

[0017] Further, the blanking device comprises an empty tray storage position, a blanking position and a traveling tool storage position connected in sequence, and each position is provided with a blanking tray.

[0018] Further, the automatic welding production line for the key structural parts of the excavator bucket further comprises a production line main control box, which is in communication connection with the RGV logistics system, the welding manipulator workstation, the feeding device and the blanking device.

[0019] Further, the production line main control box is provided with a general emergency stop button, each workstation is provided with an independent emergency stop button, and the emergency stop button is linked with the mechanical limiting device.

[0020] Further, the key structural part of the excavator bucket is an ear assembly.

[0021] Beneficial effects: compared with the prior art, the automatic welding production line for the key structural parts of the excavator bucket has the following advantages:

[0022] Through the cooperation of the movable track in the RGV logistics system and the transport trolley, the continuous circulation of the workpiece between the welding stations is realized, the manual handling link is reduced, the single-day production capacity is improved by 2, and the production capacity is improved by 20%;

[0023] The two feeding devices and the two material buffering devices arranged symmetrically form a physical buffering zone, which ensures the beat balance of the front and rear sections of the production line, and improves the comprehensive utilization rate of the equipment by 15%;

[0024] Multiple independent welding manipulator workstations arranged on both sides of the RGV logistics system can process different processes synchronously, eliminating the process waiting time of traditional production lines;

[0025] The mirror image layout design of the blanking device and the feeding device, in cooperation with the closed-loop structure of the moving ground rail, improves the return efficiency of the empty tooling;

[0026] The material buffer device is arranged in the middle and rear sections of the moving ground rail, and realizes the semi-finished product temporary storage function through physical isolation, thereby reducing the equipment idle rate. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an automatic welding production line for key structural parts of an excavator bucket;

[0028] Figure 2 It is a schematic diagram of the structure of an RGV logistics system;

[0029] Figure 3 It is a schematic diagram of the structure of a feeding device;

[0030] Figure 4 It is a schematic diagram of the structure of a welding manipulator workstation;

[0031] Figure 5 It is a schematic diagram of the structure of a manipulator workstation control box;

[0032] Figure 6 It is a schematic diagram of the structure of a blanking device;

[0033] Figure 7 It is a schematic diagram of the structure of a material buffer device. DETAILED DESCRIPTION

[0034] The present application will be further explained in conjunction with the accompanying drawings.

[0035] The specific implementation of the excavator bucket key structural part welding production line device of the utility model will be described in detail in conjunction with the accompanying drawings. The technical solutions described in the present embodiment do not involve any control program or algorithm, and only the physical structure characteristics of the product are described.

[0036] As shown in Figure 1 The utility model discloses an automatic welding production line for key structural parts of an excavator bucket, which comprises:

[0037] An RGV logistics system 1 is composed of a moving ground rail 101 and an RGV transport trolley 102 running on the moving ground rail;

[0038] Two feeding devices 2 are arranged on both sides of the inlet of the RGV logistics system 1 respectively, and are used for loading the workpieces to be welded into the production line;

[0039] A plurality of welding robot stations 3 are arranged on both sides of the RGV logistics system 1, and the plurality of welding robot stations 3 are independent of each other.

[0040] A blanking device 4 is arranged on one side of the outlet of the RGV logistics system 1.

[0041] Two material buffering devices 5 are arranged on both sides of the movable track 101 in the middle and rear sections of the RGV logistics system 1.

[0042] As shown in the drawings, Figure 2 The RGV logistics system 1 is composed of a movable track 101 and an RGV transport trolley 102. The RGV transport trolley 102 is provided with a telescopic fork mechanism, a lifting platform and a mechanical positioning device, so that the RGV transport trolley has the functions of lifting, lowering, extending laterally with the fork inserted, and rotating the upper roller with the fork inserted. In an embodiment, the mechanical positioning device comprises a positioning slot arranged on the movable track and a guide wheel set cooperation structure arranged on the bottom of the transport trolley. In an embodiment, the telescopic fork mechanism is composed of three nested guide rails, and anti-derailing limiting blocks are arranged on both sides of the middle section guide rail.

[0043] The RGV transport trolley is provided with anti-collision sensors, photoelectric detection switches, over-travel detection switches and mechanical limiting devices, and the body of the RGV transport trolley is provided with audible and visual alarm display lamps. The anti-collision sensors are installed on the RGV transport trolley to prevent the RGV transport trolley from colliding with objects during movement. When the anti-collision system fails, the anti-collision sensors are physically linked with the mechanical limiting devices, and when the sensors are triggered, the power supply of the driving motor is directly cut off. Photoelectric detection switches are arranged at the entrances and exits of the trolley conveying lines. Over-travel detection switches and mechanical limiting devices are arranged on each shaft of the RGV transport trolley. When the over-travel detection switches are triggered, the over-travel detection switches are connected to the brake pads of the RGV transport trolley through a connecting rod mechanism, and mechanical braking is generated when the over-travel detection switches are triggered. When the over-travel detection switches fail, the RGV transport trolley is limited by the mechanical limiting devices.

[0044] As shown in the drawings, Figure 3 Each feeding device 2 comprises, in sequence, an empty tray receiving position 201, two empty tray placing positions 202, a feeding position 203, and four positions to be transferred 204. The positions are conveyed by first electric rollers 206, and feeding trays 205 are placed on the positions. When a next position is empty, the following tray is advanced forward. Each position is provided with a first limiting device 207 to limit the feeding tray 205 when the feeding tray 205 moves to the position.

[0045] As shown in the drawings, Figure 4 The welding robot station 3 comprises a welding machine 301, a robot 302, a dust removal cover 303, a positioner 304 and a safety fence 305. The connection relationship of the components is prior art, and will not be described herein.

[0046] AsFigure 5 The welding manipulator workstation 3 is provided with a manipulator workstation control box 306, which is provided with a mode switching knob and an independent power switch.

[0047] As Figure 6 The unloading device 4 comprises four empty tray storage positions 401, one unloading position 402 and three tool storage positions 403 connected in sequence, and the positions are connected through the second electric roller 405, and the unloading tray 404 is placed on each position.

[0048] As Figure 7 The material buffer device 5 is used for storing the tool with the workpiece.

[0049] As Figure 1 The automatic welding production line of the key structural parts of the excavator bucket further comprises a production line main control box 6, which is in communication connection with the RGV logistics system 1, the welding manipulator workstation 3, the feeding device 2 and the unloading device 4.

[0050] The production line main control box 6 is provided with a general emergency stop button, each workstation is provided with an independent emergency stop button, and the emergency stop button is linked with the mechanical limiting device.

[0051] The automatic welding production line of the key structural parts of the excavator bucket of the utility model realizes automatic operation through pure mechanical structure cooperation, and the specific process is as follows:

[0052] (1) Feeding stage: the empty tray enters from the empty tray receiving position 201 of the feeding device, is sequentially delivered to the empty tray placing position 202 through the electric roller, and finally reaches the feeding position 203 to complete the workpiece loading. The loaded tray is pushed to the waiting transfer position 204 and fixed through the limiting device. Each position realizes tray progression through the electric roller, and the subsequent tray automatically fills the front empty position.

[0053] (2) RGV transportation and scheduling: the RGV transportation trolley 102 moves along the movable rail 101 to the waiting transfer position 204, laterally extends the fork through the telescopic fork mechanism, takes the tray, lifts and carries the workpiece. The trolley is accurately parked at the target station through the mechanical positioning device, and the telescopic fork mechanism ensures stable tray taking and placing.

[0054] (3) Welding process: the RGV trolley carries the workpiece to the specified welding manipulator workstation 3, places the tray on the positioner 304 in the workstation through the lifting platform and telescopic fork. The manipulator 302 performs welding operation in the coverage range of the dust cover 303, and the positioner 304 adjusts the workpiece posture to realize multi-angle welding.

[0055] (4) Buffer and circulation transportation: if the target workstation is in a busy state, the RGV trolley temporarily stores the workpiece in the material buffer device 5; after the workstation is idle, it is taken out and sent in again. The workpiece after welding is transported by the RGV trolley again, and may pass through multiple workstations according to the process requirements or directly enter the unloading link.

[0056] (5) Unloading and tooling recovery: the RGV trolley transports the finished product to the unloading position 402 of the unloading device 4, and after unloading, the empty tray enters the empty tray storage position 401, and the accompanying tooling is transferred to the accompanying tooling storage position 403. The unloading device realizes tray progression through a motorized roller, and the empty tray can be recycled to the feeding end for repeated use.

[0057] The above only describes the preferred embodiments of the present application, and it should be noted that for ordinary skilled persons in the art, several improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered within the scope of protection of the present application.

Claims

1. An automated welding production line for key structural components of excavator buckets, characterized by: It comprises: An RGV logistics system composed of a mobile track and RGV transport trolleys running on the mobile track; Two feeding devices respectively arranged on the two sides of the entrance of the RGV logistics system; A plurality of welding robot workstations arranged on the two sides of the RGV logistics system, and the plurality of welding robot workstations are independent of each other; A discharging device arranged on the side of the exit of the RGV logistics system; Two material buffer devices arranged on the two sides of the mobile track in the rear section of the RGV logistics system.

2. The automatic welding production line of key structural parts of excavator buckets according to claim 1, characterized in that: The RGV transport trolley is provided with a telescopic fork mechanism, a lifting platform and a mechanical positioning device.

3. The automated welding line for key structural components of excavator buckets of claim 1, wherein: The RGV transport trolley is provided with anti-collision sensors, photoelectric detection switches, over-travel detection switches and mechanical limit devices, and the vehicle body is provided with audible and visual alarm display lights.

4. The automated welding line for key structural components of excavator buckets of claim 1, wherein: The feeding device comprises, in sequence, an empty tray receiving position, an empty tray placing position, a feeding position and a waiting transfer position, and each position is connected through a first electric roller conveyor, and each position is provided with a feeding tray.

5. The automated welding line for key structural components of excavator buckets of claim 1, wherein: The welding robot workstation is provided with a robot workstation control box, and the control box is provided with a mode switching knob and an independent power switch.

6. The automated welding line for key structural components of excavator buckets of claim 1, wherein: The discharging device comprises, in sequence, an empty tray storage position, a discharging position and a tool storage position, and each position is connected through a second electric roller conveyor, and each position is provided with a discharging tray.

7. The automated welding line for key structural components of excavator buckets of claim 1, wherein: It also comprises a production line main control box, which is in communication connection with the RGV logistics system, the welding robot workstation, the feeding device and the discharging device.

8. The automated welding line for key structural components of excavator buckets of claim 7, wherein: The production line main control box is provided with a total emergency stop button, each workstation is provided with an independent emergency stop button, and the emergency stop button is linked with the mechanical limit device.

9. The automated welding line for key structural components of excavator buckets of claim 1, wherein: The key structural part of the excavator bucket is an ear assembly.

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