Special automatic spot welding machine for battery box

Abstract

The utility model discloses an automatic spot welding machine special for a battery box, which relates to the technical field of automatic welding machines and comprises a base, the base is a cuboid block, supporting legs are fixedly arranged below the base, and anti-skid structures are arranged at the bottoms of the supporting legs. A Y-axis servo system is fixedly connected to the upper portion of the base, the length of the Y-axis servo system is larger than that of the base, the width of the Y-axis servo system is smaller than that of the base, an X-axis servo system is fixedly arranged on the Y-axis servo system, the X-axis servo system is perpendicular to the Y-axis servo system, and a floating mechanism is connected to the upper portion of the X-axis servo system through bolts. And a front electrode holder is fixedly arranged above the floating mechanism. The mode that the front electrode holder and the rear electrode holder work at the same time is adopted, each electrode holder walks in the X-axis direction and the Y-axis direction through a double-axis servo system, and the requirements of different welding spot positions on a workpiece are met. And rapid spot welding machining can be conducted on the workpiece according to a set path, automatic operation is achieved, and the welding precision and efficiency are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic spot welding machines, in particular to a special automatic spot welding machine for battery boxes. Background Art

[0002] In electric vehicles, the battery box, as a carrier of the battery, plays a key role in the placement and safety protection of the battery. Due to the limited internal space of electric vehicles and the increasing number of batteries required as the performance of the vehicle improves, higher requirements are placed on the layout of the battery, and also on the structural strength, rigidity and lightweight design of the battery box.

[0003] The lower body of the battery box usually requires spot welding of the two formed thin plates of the lower shell and the fixed plate, with the number of welding points reaching 80 to 100. The existing technology generally has the problems of high labor intensity, low production efficiency, and the quality of some welding points not meeting the requirements. In view of the shortcomings of the existing technology, a technical solution of a double-station double-welding clamp five-axis four-servo automatic spot welding machine is proposed, which includes six parts: transposition movement system, fixture system, spot welding system, control cabinet, incoming material frame and finished material frame. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a battery box automatic spot welding machine. The layout adopts left and right double-station operation. When a workpiece is manually loaded at one station, the other station is in an automatic welding state. After welding is completed, the station conversion is realized by shifting the axis table. The previous loading station is converted to a welding station and can immediately enter the welding state. The previous welding station is converted to a loading station, and the unloading and loading operations can be performed. The time for unloading and loading does not occupy the entire welding process. The front and rear welding clamps are operated simultaneously. Each welding clamp can move in the X-axis and Y-axis directions through a dual-axis servo system to meet the needs of different welding point positions on the workpiece; the workpiece can be quickly spot welded according to the set path to realize automatic operation, effectively improve the welding accuracy and efficiency, and solve the problems raised by the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a special machine for automatic spot welding of battery boxes, comprising a base, the base is a rectangular block, support legs are fixedly arranged at the bottom of the base, and an anti-slip structure is arranged at the bottom of the support legs; a Y-axis servo system is fixedly connected to the top of the base, the length of the Y-axis servo system is greater than the length of the base, the width of the Y-axis servo system is less than the width of the base, an X-axis servo system is fixedly arranged above the Y-axis servo system, the X-axis servo system is vertically arranged to the Y-axis servo system, a floating mechanism is bolted to the top of the X-axis servo system, and a front welding clamp is fixedly arranged above the floating mechanism.

[0006] Preferably, the base is placed on the ground, a left finished material frame is fixedly provided on the left side of the ground, the material of the left finished material frame is alloy steel, a right finished material frame is fixedly provided on the right side of the ground, the left finished material frame is consistent in size with the right finished material frame, and the left finished material frame and the right finished material frame are mirror-symmetrical about the center line of the ground.

[0007] Preferably, a left feed frame and a right feed frame are fixedly provided on the front side of the ground, the left feed frame and the right feed frame are consistent in shape and size, and the left feed frame and the right feed frame are mirror-symmetrical about the center line of the ground.

[0008] Preferably, a transposition movable axle platform is fixedly provided on the ground, a guide rail is fixedly provided on the top of the transposition movable axle platform, the length of the guide rail is smaller than the length of the transposition movable axle platform, a slide is slidably connected to the guide rail, one side of the slide is fixedly connected to the cylinder, and one side of the cylinder is aligned with one side of the guide rail.

[0009] Preferably, a base plate is fixedly connected to the slider, peripheral support columns are fixedly arranged on the edge of the base plate, a workpiece is fixedly connected to the top of the peripheral support columns, and a plurality of intermediate support columns are fixedly arranged on the bottom of the workpiece and the top of the base plate.

[0010] Preferably, clamping mechanisms are fixedly provided on both sides of the workpiece, the two clamping mechanisms are mirror-symmetrical about the center line of the workpiece, a front welding clamp is fixedly provided above the workpiece, and two control cabinets are fixedly provided behind the transposition movable shaft platform.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. Each soldering point is uniform, without burrs, burn-through and other undesirable phenomena.

[0013] 2. The material frame is located next to the operating position, which can reduce the walking distance of workers and effectively reduce labor intensity.

[0014] 3. The spot welding cycle is about 180s / piece. The production efficiency can meet the needs of mass production and match the process cycle of the entire battery box welding line. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the clamp of the utility model;

[0017] Figure 3 It is a spot welding schematic diagram of the utility model;

[0018] Figure 4 It is a schematic diagram of the transposition movable axle platform of the utility model.

[0019] Among them: 1. Transposition movable shaft table; 1.1. Slide table; 1.2. Cylinder; 1.3. Guide rail; 2. Bottom plate; 2.1. Peripheral support columns; 2.2. Clamping mechanism; 2.3. Intermediate support column; 2.4. Workpiece; 3.1. Front welding clamp; 3.2. X-axis servo system; 3.3. Y-axis servo system; 3.4. Base; 3.5. Floating mechanism; 3.6. Rear welding clamp; 4. Control cabinet; 5.1. Left finished material frame; 5.2. Right finished material frame; 6.1. Left feed frame; 6.2. Right feed frame. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, purpose and efficacy of the utility model easy to understand, the utility model is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the utility model. The experimental methods in the following embodiments are conventional methods unless otherwise specified, and the materials, reagents, etc. used in the following embodiments are all commercially available unless otherwise specified.

[0021] Example

[0022] like Figure 1-4 As shown, the utility model provides a battery box automatic spot welding machine, including a base 3.4, the base 3.4 is a rectangular block, a support leg is fixedly arranged at the bottom of the base 3.4, and an anti-skid structure is arranged at the bottom of the support leg; a Y-axis servo system 3.3 is fixedly connected to the top of the base 3.4, the length of the Y-axis servo system 3.3 is greater than the length of the base 3.4, the width of the Y-axis servo system 3.3 is less than the width of the base 3.4, an X-axis servo system 3.2 is fixedly arranged on the top of the Y-axis servo system 3.3, the X-axis servo system 3.2 and the Y-axis servo system 3.3 are vertically arranged, a floating mechanism 3.5 is bolted to the top of the X-axis servo system, and a front welding clamp 3.1 is fixedly arranged on the top of the floating mechanism 3.5.

[0023] It should be noted that the front and rear welding clamps are operated simultaneously, and each welding clamp can move in the X-axis and Y-axis directions through a dual-axis servo system to meet the needs of different welding point positions on the workpiece 2.4; the workpiece 2.4 can be spot-welded quickly according to the set path to achieve automated operation and effectively improve the welding accuracy and efficiency.

[0024] Furthermore, the base 3.4 is placed on the ground, a left finished material frame 5.1 is fixedly arranged on the left side of the ground, the material of the left finished material frame 5.1 is alloy steel, and a right finished material frame 5.2 is fixedly arranged on the right side of the ground, the left finished material frame 5.1 is consistent in size with the right finished material frame 5.2, and the left finished material frame 5.1 and the right finished material frame 5.2 are mirror-symmetrical about the center line of the ground.

[0025] Furthermore, a left feed frame 6.1 and a right feed frame 6.2 are fixedly provided on the front side of the ground. The left feed frame 6.1 and the right feed frame 6.2 have the same shape and size, and are mirror-symmetrical about the center line of the ground.

[0026] Furthermore, a transposition movable shaft platform 1 is fixedly provided on the ground, a guide rail 1.3 is fixedly provided on the top of the transposition movable shaft platform 1, the length of the guide rail 1.3 is smaller than the length of the transposition movable shaft platform 1, a slide 1.1 is slidably connected to the guide rail 1.3, one side of the slide 1.1 is fixedly connected to the cylinder 1.2, and one side of the cylinder 1.2 is aligned with one side of the guide rail 1.3.

[0027] Furthermore, a base plate 2 is fixedly connected to the slider, a peripheral support column 2.1 is fixedly arranged on the edge of the base plate 2, a workpiece 2.4 is fixedly connected to the top of the peripheral support column 2.1, and a plurality of intermediate support columns 2.3 are fixedly arranged between the bottom of the workpiece 2.4 and the top of the base plate 2.

[0028] Furthermore, clamping mechanisms 2.2 are fixedly provided on both sides of the workpiece 2.4, and the two clamping mechanisms 2.2 are mirror-symmetrical about the center line of the workpiece 2.4. A rear welding clamp 3.6 is fixedly provided above the workpiece 2.4, and two control cabinets 4 are fixedly provided behind the transposition movable shaft platform 1.

[0029] In this embodiment, the fixture systems on the left and right sides of the bottom plate 2 correspond to workstations No. 1 and No. 2 respectively. When workstation No. 1 is a loading workstation, workstation No. 2 is a welding workstation, and vice versa.

[0030] The worker first loads the workpiece at the left operating position between the front welding clamp 3.1, the left finished material frame 5.1 and the left feed frame 6.1, and places the lower shell and the fixed plate of the workpiece 2.4 in the No. 1 station respectively, supports them on the peripheral support column 2.1 and the middle support column 2.3, and positions and locks them through the clamping mechanism 2.2; then the transposition movable axle table 1 starts to work, and the cylinder 1.2 drives the slide 1.1 to move, thereby driving the bottom plate 2 to move to realize the station conversion, the No. 1 station is transferred to the welding station to start automatic spot welding, and the No. 2 station becomes the loading station; the worker then goes to the right operating position between the front welding clamp 3.1, the right finished material frame 5.2 and the right feed frame 6.2 to load the workpiece, and places the lower shell and the fixed plate in the No. 2 station to position and lock them. After the welding of the No. 1 station is completed, the station conversion is realized by the transposition movable axle table 1, and the No. 2 station is transferred to the welding station to start the automatic welding of the next piece, and the No. 1 station becomes the loading station, which can carry out the unloading and loading operations.

[0031] The battery box of this embodiment has a total of 83 welding points, which are close to each other and evenly distributed without height difference. The welding time of each welding point is 3.3s; the time of each jump of the welding clamp is 0.8s; the time of each displacement movement of the axle table is 3s; the time of electrode cap inspection and mold repair is 2s / piece (inspection is once every 10 parts produced, and the time is 20 seconds). Each cycle can complete 2 pieces of work, and the time consumed includes the above welding time, welding clamp jump time, axle table movement time, maintenance time, etc., totaling 354.4s, and the JPH of the special machine is 20.3.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A battery box automatic spot welding machine, comprising a base (3.4), characterized in that: The base (3.4) is a rectangular block, a support leg is fixedly provided below the base (3.4), and an anti-slip structure is provided at the bottom of the support leg; a Y-axis servo system (3.3) is fixedly connected to the top of the base (3.4), the length of the Y-axis servo system (3.3) is greater than the length of the base (3.4), the width of the Y-axis servo system (3.3) is less than the width of the base (3.4), an X-axis servo system (3.2) is fixedly provided on the top of the Y-axis servo system (3.3), the X-axis servo system (3.2) and the Y-axis servo system (3.3) are arranged vertically, a floating mechanism (3.5) is bolted to the top of the X-axis servo system, and a front welding clamp (3.1) is fixedly provided on the top of the floating mechanism (3.5).

2. The battery box automatic spot welding machine according to claim 1, characterized in that: The base (3.4) is placed on the ground, a left finished material frame (5.1) is fixedly arranged on the left side of the ground, the material of the left finished material frame (5.1) is alloy steel, a right finished material frame (5.2) is fixedly arranged on the right side of the ground, the left finished material frame (5.1) and the right finished material frame (5.2) are of the same size, and the left finished material frame (5.1) and the right finished material frame (5.2) are mirror-symmetrical about the center line of the ground.

3. The battery box automatic spot welding machine according to claim 2, characterized in that: A left feed frame (6.1) and a right feed frame (6.2) are fixedly arranged on the front side of the ground; the left feed frame (6.1) and the right feed frame (6.2) are consistent in shape and size; and the left feed frame (6.1) and the right feed frame (6.2) are mirror-symmetrical about the center line of the ground.

4. The battery box automatic spot welding machine according to claim 2, characterized in that: A transposition movable axle platform (1) is fixedly arranged on the ground, a guide rail (1.3) is fixedly arranged on the top of the transposition movable axle platform (1), the length of the guide rail (1.3) is less than the length of the transposition movable axle platform (1), a slide table (1.1) is slidably connected to the guide rail (1.3), one side of the slide table (1.1) is fixedly connected to the cylinder (1.2), and one side of the cylinder (1.2) is aligned with one side of the guide rail (1.3).

5. The automatic spot welding machine for battery box according to claim 4 is characterized in that: A bottom plate (2) is fixedly connected to the slider, a peripheral support column (2.1) is fixedly arranged on the edge of the bottom plate (2), a workpiece (2.4) is fixedly connected to the top of the peripheral support column (2.1), and a plurality of intermediate support columns (2.3) are fixedly arranged between the bottom of the workpiece (2.4) and the top of the bottom plate (2).

6. The battery box automatic spot welding machine according to claim 5, characterized in that: Clamping mechanisms (2.2) are fixedly arranged on both sides of the workpiece (2.4), the two clamping mechanisms (2.2) are mirror-symmetrical about the center line of the workpiece (2.4), a rear welding clamp (3.6) is fixedly arranged above the workpiece (2.4), and two control cabinets (4) are fixedly arranged behind the transposition movable shaft platform (1). 。

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