Pressing plate mechanism for laser welding

Abstract

The utility model provides a pressing plate mechanism for laser welding. The pressing plate mechanism comprises a longitudinal carriage, the pressing plate assembly is installed on the longitudinal carriage in a sliding mode, and the pressing plate assembly can move in the longitudinal direction relative to the longitudinal carriage; the driving part is installed on the longitudinal carriage and comprises an electric cylinder and a servo motor with a brake, the servo motor with the brake is used for driving the electric cylinder, and the electric cylinder is used for driving the pressing plate assembly to move relative to the longitudinal carriage; and the pressure sensor is arranged on the pressing plate assembly and is in electric connection or communication connection with the servo motor with the brake. According to the utility model, the servo motor with the brake is used for controlling the electric cylinder, so that the electric cylinder can realize decelerated downward pressing before downward pressing in place and decelerated rising before rising in place, thereby being capable of effectively avoiding impact on a busbar and a battery cell in the process of pressing the busbar, reducing the vibration amplitude of the pressing plate mechanism and guaranteeing the welding quality.

Description

Technical Field

[0001] The utility model relates to the technical field of welding equipment, in particular to a pressing plate mechanism for laser welding. Background Art

[0002] When laser welding the bus bar and the pole column of the battery cell module, it is necessary to press and fix them with the help of external force to ensure the welding quality. In the prior art, a combination of a cylinder and a pressure regulating valve is mostly used to press the bus bar and the pole column. However, in this pressing method, the extension and retraction speed of the cylinder is constant throughout the stroke, and it is impossible to achieve decelerated downward pressure before reaching the position, which will cause the bus bar and the battery cell module to be easily impacted and then misaligned and generate noise, which is not conducive to ensuring the welding quality. Summary of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a pressing plate mechanism for laser welding, which can effectively avoid the impact on the bus bar and the battery cell during the process of pressing the bus bar by controlling the electric cylinder with a brake servo motor, reduce the vibration amplitude of the pressing plate mechanism, and ensure the welding quality.

[0004] The embodiments of the utility model are realized by the following technical solutions:

[0005] A pressing plate mechanism for laser welding includes a longitudinal carriage; a pressing plate assembly slidably mounted on the longitudinal carriage, and the pressing plate assembly can move longitudinally relative to the longitudinal carriage; a driving member mounted on the longitudinal carriage, the driving member includes an electric cylinder and a brake servo motor, the brake servo motor is used to drive the electric cylinder, and the electric cylinder is used to drive the pressing plate assembly to move relative to the longitudinal carriage; a pressure sensor disposed on the pressing plate assembly and electrically connected or communicatively connected to the brake servo motor.

[0006] According to a preferred embodiment, the pressing plate assembly includes a mounting seat and a copper nozzle pressing plate portion connected to each other, the pressure sensor is press-fitted on the copper nozzle pressing plate portion, the mounting seat is slidably connected to the longitudinal carriage, and the driving portion of the electric cylinder is connected to the mounting seat.

[0007] According to a preferred embodiment, the copper nozzle pressing plate portion includes a mounting plate, a mounting block and an annular copper nozzle, the annular copper nozzle is mounted on the mounting block, and the mounting block is mounted on the mounting plate through the pressure sensor.

[0008] According to a preferred embodiment, a guide rod is provided on the annular copper nozzle, the guide rod penetrates through the mounting block and is slidably connected to it, and a buffer spring is sleeved outside the guide rod, and the buffer spring is located between the annular copper nozzle and the mounting block.

[0009] According to a preferred embodiment, a limiting head is configured at one end of the guiding rod away from the annular copper nozzle, a guiding hole is configured on the mounting block, the guiding rod is embedded in the guiding hole, and the diameter of the limiting head is greater than the inner diameter of the guiding hole.

[0010] According to a preferred embodiment, a receiving cavity is configured on one side of the mounting plate facing the mounting block for receiving one end of the guiding rod away from the annular copper nozzle.

[0011] According to a preferred embodiment, the copper nozzle pressing plate portion further includes an air guide pipe, one end of the air guide pipe communicates with the inside of the annular copper nozzle, and the other end is connected to a negative pressure source.

[0012] According to a preferred embodiment, the mounting seat includes a longitudinal plate slidably connected to the longitudinal carriage, a bottom plate is configured at the bottom of the longitudinal plate, an avoidance notch is formed on the bottom plate, the copper nozzle pressing plate portion is mounted on the bottom plate, and a laser hole is provided on the copper nozzle pressing plate portion and is located within the avoidance notch.

[0013] According to a preferred embodiment, a sliding plate is assembled on the bottom plate, the sliding plate is L-shaped, and a sliding groove for receiving the copper nozzle pressing plate portion is formed between the sliding plate and the bottom plate.

[0014] According to a preferred embodiment, the bottom plate is perpendicular to the longitudinal carriage.

[0015] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0016] By means of the pressure sensor, the present invention can timely feedback the pressure value applied by the pressing plate assembly to the workpiece to be welded, cooperate with the brake servo motor to control the electric cylinder to extend or retract, and the brake servo motor can control the electric cylinder to realize decelerated downward pressing before reaching the lower position and decelerated upward rising before reaching the upper position, so as to effectively avoid the impact on the bus bar and the battery cell during the process of pressing the bus bar, thereby effectively reducing the probability of misalignment of the bus bar and the battery cell. At the same time, the noise can be effectively reduced, the vibration amplitude of the pressing plate mechanism can be reduced, and the welding quality is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1Schematic three-dimensional structure diagram of the pressing plate mechanism for laser welding provided by an embodiment of the present utility model;

[0019] Figure 2 First schematic three-dimensional structure diagram of the copper nozzle pressing plate part provided by an embodiment of the present utility model;

[0020] Figure 3 Second schematic three-dimensional structure diagram of the copper nozzle pressing plate part provided by an embodiment of the present utility model;

[0021] Figure 4 Top view structure diagram of the copper nozzle pressing plate part provided by an embodiment of the present utility model;

[0022] Figure 5 is Figure 4 Schematic cross-sectional view of the A-A section in

[0023] Figure 6 is Figure 5 Local enlarged schematic diagram of the structure at B in

[0024] Figure 7 Schematic three-dimensional structure diagram of the mounting seat provided by an embodiment of the present utility model.

[0025] Icon: 1, longitudinal carriage; 11, driving member; 111, servo motor with brake; 112, electric cylinder; 2, pressing plate assembly; 21, mounting seat; 211, longitudinal plate; 212, side plate; 213, bottom plate; 2131, avoidance notch; 214, sliding plate; 2141, sliding groove; 22, copper nozzle pressing plate part; 221, mounting plate; 2211, cover plate; 2212, accommodating cavity; 222, mounting block; 2221, linear bearing; 223, annular copper nozzle; 2231, guide rod; 22311, limiting head; 2232, buffer spring; 3, pressure sensor; 4, slide rail slider assembly; 5, laser hole; 6, air duct; X, longitudinal direction. Detailed implementation manners

[0026] For better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of this utility model herein are only for the purpose of describing specific embodiments and are not intended to limit this utility model.

[0029] Please refer to Figures 1 to 7 , a pressing plate mechanism for laser welding, comprising a longitudinal carriage 1, a pressing plate assembly 2, a driving member 11 and a pressure sensor 3. Among them, the pressing plate assembly 2 is slidably mounted on the longitudinal carriage 1, and the pressing plate assembly 2 can move longitudinally along the X-axis relative to the longitudinal carriage 1; the driving member 11 is mounted on the longitudinal carriage 1, and the driving member 11 includes an electric cylinder 112 and a brake servo motor 111. The brake servo motor 111 is used to drive the electric cylinder 112, and the electric cylinder 112 is used to drive the pressing plate assembly 2 to move relative to the longitudinal carriage 1; the pressure sensor 3 is provided on the pressing plate assembly 2 and is electrically connected or communicatively connected to the brake servo motor 111. Here, the pressure sensor 3 can real-time feedback the pressure value applied by the pressing plate assembly 2 to the workpiece to be welded, so as to cooperate with the brake servo motor 111 to control the extension or retraction of the electric cylinder 112, and the brake servo motor 111 can control the electric cylinder 112 to achieve decelerated downward pressing before pressing in place and decelerated upward rising before rising in place, thereby effectively avoiding the impact on the busbar and the battery cell during the pressing process of the busbar, and then effectively reducing the probability of misalignment of the busbar and the battery cell. At the same time, it can effectively reduce noise and reduce the vibration amplitude of the pressing plate mechanism, ensuring the welding quality.

[0030] In this embodiment, a central processing unit is further included, and the pressure sensor 3 is electrically connected or communicatively connected to the brake servo motor 111 through the central processing unit. Specifically, the pressure sensor 3 transmits the pressure signal to the central processing unit, and the central processing unit controls the brake servo motor 111 according to the pressure value. The central processing unit can be a single-chip microcomputer. Optionally, the central processing unit is mounted on the longitudinal carriage 1.

[0031] In this embodiment, the pressing plate assembly 2 is slidably connected to the longitudinal carriage 1 through a slide rail-slider assembly 4.

[0032] The pressing plate assembly 2 includes a mounting seat 21 and a copper nozzle pressing plate part 22 which are connected to each other. The pressure sensor 3 is press-fitted on the copper nozzle pressing plate part 22. The mounting seat 21 is slidably connected to the longitudinal carriage 1, and the driving part of the electric cylinder 112 is connected to the mounting seat 21.

[0033] Preferably, the copper nozzle pressing plate part 22 is detachably connected to the mounting seat 21.

[0034] As Figure 1 and Figure 7As shown, the mounting base 21 includes a longitudinal plate 211 slidably connected to the longitudinal towing plate 1 through a slide rail and slider assembly 4. A bottom plate 213 is disposed at the bottom of the longitudinal plate 211. An avoidance notch 2131 is formed in the bottom plate 213. The copper nozzle pressing part 22 is mounted on the bottom plate 213. A laser hole 5 is provided on the copper nozzle pressing part 22, and the laser hole 5 is located within the avoidance notch 2131. The copper nozzle pressing part 22 and the bottom plate 213 are detachably assembled by bolts or screws.

[0035] Further, in order to facilitate the disassembly and assembly of the copper nozzle pressing part 22 on the bottom plate 213, a slide plate 214 is assembled on the bottom plate 213. The slide plate 214 is in an L shape, and a chute 2141 for accommodating the copper nozzle pressing part 22 is formed between the slide plate 214 and the bottom plate 213. As Figure 1 and Figure 7 shown, during use, when assembling the copper nozzle pressing part 22, insert it into the chute 2141 and push it in the direction of the longitudinal towing plate 1, and then fix it to the bottom plate 213 or the slide plate 214 by bolts or screws.

[0036] It should be noted that the bottom plate 213 is perpendicular to the longitudinal towing plate 1.

[0037] As Figure 7 shown, a side plate 212 is provided between the longitudinal plate 211 and the bottom plate 213 to reinforce the assembly structure of the longitudinal plate 211 and the bottom plate 213.

[0038] In this embodiment, as Figures 2 to 6 shown, the copper nozzle pressing part 22 includes a mounting plate 221, a mounting block 222, and an annular copper nozzle 223. The annular copper nozzle 223 is mounted on the mounting block 222, and the mounting block 222 is mounted on the mounting plate 221 through a pressure sensor 3. When the copper nozzle pressing part 22 is mounted on the mounting base 21, the mounting plate 221 is embedded in the chute 2141. The optical path hole of the annular copper nozzle 223 here forms the aforementioned laser hole 5. As Figure 2 and Figure 3 shown, four mounting blocks 222 are provided on the mounting plate 221, corresponding to four annular copper nozzles 223, which can realize simultaneous welding at four points, facilitating the improvement of welding efficiency.

[0039] As Figure 5 and Figure 6 shown, a guide rod 2231 is provided on the annular copper nozzle 223. The guide rod 2231 passes through the mounting block 222 and is slidably connected thereto. A buffer spring 2232 is sleeved outside the guide rod 2231, and the buffer spring 2232 is located between the annular copper nozzle 223 and the mounting block 222. The buffer spring 2232 here can provide buffering for the annular copper nozzle 223 when it contacts the bus bar, so as to prevent the annular copper nozzle 223 from making hard contact with the bus bar.

[0040] Furthermore, a limiting head 22311 is configured at one end of the guide rod 2231 away from the annular copper nozzle 223. A guide hole is configured on the mounting block 222, and the guide rod 2231 is embedded in the guide hole. The diameter of the limiting head 22311 is greater than the inner diameter of the guide hole. In this embodiment, the guide rod 2231 and the guide hole are slidably connected through a linear bearing 2221. During use, it is only necessary that the diameter of the limiting head 22311 is greater than the inner diameter of the linear bearing 2221. In another embodiment, the guide rod 2231 is slidably connected to the inner wall of the guide hole. At this time, it is only necessary that the diameter of the limiting head 22311 is greater than the inner diameter of the guide hole. The limiting head 22311 here is used to limit the annular copper nozzle 223 when it is suspended to prevent it from detaching from the mounting block 222.

[0041] As Figure 6 shown, a receiving cavity 2212 is configured on one side of the mounting plate 221 facing the mounting block 222 for receiving one end of the guide rod 2231 away from the annular copper nozzle 223. The receiving cavity 2212 here reserves space for the guide rod 2231 to move longitudinally along the X axis.

[0042] As Figure 6 shown, a cover plate 2211 is provided on the mounting plate 221. The side of the cover plate 2211 facing the mounting plate 221 is configured as a concave structure and serves as a part of the receiving cavity 2212.

[0043] As Figure 1 shown, the copper nozzle pressing part 22 further includes an air guide pipe 6. One end of the air guide pipe 6 communicates with the inside of the annular copper nozzle 223, and the other end is connected to a negative pressure source (not shown in the figure). The negative pressure generated by the negative pressure source can pass through the air guide pipe 6. The welding slag and fumes generated during the welding process are discharged through the air guide pipe 6, which is beneficial to ensuring the welding quality of the product.

[0044] The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present utility model.

Claims

1. A pressing plate mechanism for laser welding, characterized in that, Comprising: Longitudinal sled (1); Pressing plate assembly (2), slidably mounted on the longitudinal sled (1), and the pressing plate assembly (2) can move longitudinally (X) relative to the longitudinal sled (1); Driver (11), mounted on the longitudinal sled (1), the driver (11) includes an electric cylinder (112) and a brake servo motor (111), the brake servo motor (111) is used to drive the electric cylinder (112), and the electric cylinder (112) is used to drive the pressing plate assembly (2) to move relative to the longitudinal sled (1); Pressure sensor (3), arranged on the pressing plate assembly (2), and electrically connected or communicatively connected to the brake servo motor (111).

2. The pressing plate mechanism for laser welding according to claim 1, wherein The pressing plate assembly (2) includes a mounting seat (21) and a copper nozzle pressing plate part (22) connected to each other, the pressure sensor (3) is press-fitted on the copper nozzle pressing plate part (22), the mounting seat (21) is slidably connected to the longitudinal sled (1), and the driving part of the electric cylinder (112) is connected to the mounting seat (21).

3. The pressing plate mechanism for laser welding according to claim 2, wherein, The copper nozzle pressing plate part (22) includes a mounting plate (221), a mounting block (222) and an annular copper nozzle (223), the annular copper nozzle (223) is mounted on the mounting block (222), and the mounting block (222) is mounted on the mounting plate (221) through the pressure sensor (3).

4. The pressing plate mechanism for laser welding according to claim 3, wherein A guide rod (2231) is arranged on the annular copper nozzle (223), the guide rod (2231) penetrates through the mounting block (222) and is slidably connected thereto, a buffer spring (2232) is sleeved outside the guide rod (2231), and the buffer spring (2232) is located between the annular copper nozzle (223) and the mounting block (222).

5. The pressing plate mechanism for laser welding according to claim 4, characterized in that, A limiting head (22311) is configured at one end of the guide rod (2231) away from the annular copper nozzle (223), a guide hole is configured on the mounting block (222), the guide rod (2231) is embedded in the guide hole, and the diameter of the limiting head (22311) is larger than the inner diameter of the guide hole.

6. The pressing plate mechanism for laser welding according to claim 4, wherein, A receiving cavity (2212) is configured on one side surface of the mounting plate (221) facing the mounting block (222) for receiving one end of the guide rod (2231) away from the annular copper nozzle (223).

7. The pressing plate mechanism for laser welding according to claim 3, characterized in that, The copper nozzle pressing plate part (22) further includes an air duct (6), one end of the air duct (6) communicates with the inside of the annular copper nozzle (223), and the other end is connected to a negative pressure source.

8. The pressing plate mechanism for laser welding according to claim 2, wherein, The mounting seat (21) includes a longitudinal plate (211) slidably connected to the longitudinal sled (1), a bottom plate (213) is configured at the bottom of the longitudinal plate (211), an avoidance notch (2131) is formed on the bottom plate (213), the copper nozzle pressing plate part (22) is mounted on the bottom plate (213), and a laser hole (5) is arranged on the copper nozzle pressing plate part (22), and the laser hole (5) is located in the avoidance notch (2131).

9. The pressing plate mechanism for laser welding according to claim 8, wherein, A slide plate (214) is assembled on the bottom plate (213). The slide plate (214) is L-shaped, and a chute (2141) for accommodating the copper nozzle pressing part (22) is formed between the slide plate (214) and the bottom plate (213).

10. The pressing plate mechanism for laser welding according to claim 8, wherein, The bottom plate (213) is perpendicular to the longitudinal carriage (1).

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