Tin ring suction device applied to automatic laser welding system
Through the combination of the suction nozzle design of the suction tube and the laser ranging probe, the problem of damage to the traditional mechanical jaw grabbing tin ring is solved, and the efficient and accurate supply of the tin ring is achieved, which is suitable for laser automatic welding systems.
Patent Information
- Application Number
- CN202421407101.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-06-19
AI Technical Summary
Traditional mechanical jaw gripping tin rings are prone to damage and have poor inapplicability, which cannot meet the high-efficiency tin ring supply requirements of laser automatic welding systems.
The suction nozzle design adopts the suction tube, and the tin ring is absorbed by negative pressure, and the incomplete annular air hole and cone structure is used to reduce damage to the tin ring. Combined with the design of the laser ranging probe and elastic sheet, precise absorption and deformation prevention are achieved.
It reduces damage and deformation of the tin ring, improves the efficiency and accuracy of the tin ring, reduces the risk of crushing other tin rings, and adapts to the efficient supply of laser automatic welding systems.
Smart Images
Figure CN223129649U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of laser welding, and in particular to a tin ring suction device applied to a laser automatic welding system. Background Art
[0002] The welding of semiconductor discrete devices and PCB through-holes is actually welding the through-holes of the PCB and the needle pins of the semiconductor devices and making them energized. The surface of the PCB has a pad (usually copper-plated or gold-plated, and the pad is generally circular, and the center point of the pad coincides with the center point of the through-hole, so the pad is generally actually annular), and the semiconductor needle pins are generally cylindrical.
[0003] The PCB itself has a certain thickness, generally between 0.1-6mm, that is, the depth of the through hole in the PCB is equal to the thickness of the PCB. After the semiconductor needle pin is inserted into the PCB through hole, the semiconductor array pin protrudes about 1-3mm from the PCB surface.
[0004] The traditional welding method is: the electric soldering iron is close to the pin, the solder wire contacts the electric soldering iron, the solder wire melts and the liquid solder is guided to the pin position to complete the welding. This welding method is relatively inefficient and cannot meet the needs of large-scale processing, so related companies have also introduced laser welding technology. When using laser welding technology to weld pins, it is relatively inconvenient to imitate the manual supply of solder wire, so tin rings are also introduced. When welding is required, first put the tin rings on the pins one by one, and then heat them with laser to melt them.
[0005] Generally, in addition to manually putting the tin ring on the pin, it can also be grasped by a mechanical clamp and then put on the pin. However, since the tin ring is small in size and easily deformed, and the grasping part of the mechanical clamp is large, tin rings close to each other can be accidentally crushed, and the mechanical clamp is relatively unsuitable for use. Therefore, this application proposes a new technical solution. Utility Model Content
[0006] In order to reduce the damage to the tin ring during removal and movement, the present application provides a tin ring suction device for use in a laser automatic welding system.
[0007] The present application provides a tin ring suction device for a laser automatic welding system, which adopts the following technical solution:
[0008] A tin ring suction device applied to a laser automatic welding system, comprising a machine head and a suction pipe. The suction pipe is vertically installed on the machine head. The upper end of the suction pipe is detachably connected with a vacuum suction joint, and the lower end is formed with a suction nozzle. A main air passage and an incomplete annular air hole are formed in the suction pipe. The main air passage extends vertically and communicates with the upper end of the vacuum suction joint and the incomplete annular air hole. The inner diameter of the incomplete annular air hole is larger than the inner diameter of the tin ring, and its outer diameter is smaller than the outer diameter of the tin ring. The incomplete annular air hole is located in the suction nozzle. The suction nozzle is in a frustum structure in side view with the small end facing downwards.
[0009] Optionally, the main air passage includes an upper air passage and a lower air passage which are vertically distributed and communicated. The upper end of the upper air passage is detachably connected with one end of the vacuum suction joint. The diameter of the upper air passage is larger than that of the lower air passage. The diameter of the lower air passage is larger than the outer diameter of the incomplete annular air hole.
[0010] Optionally, a connecting ring is arranged above the suction nozzle on the suction pipe. A laser ranging probe is detachably connected to the connecting ring. The detection line of the laser ranging probe inclines downwards and intersects with the central axis of the incomplete annular air hole.
[0011] Optionally, a middle hole is formed in the suction nozzle. The upper end of the middle hole is closed and located in the middle of the incomplete annular air hole. The middle hole is used for sleeving a material rod, a pin for threading a plurality of tin rings or inserting a positioning rod. The diameter of a section of the positioning rod extending out of the suction nozzle is adapted to the inner diameter of the tin ring, and the lower end of the positioning rod is a round head.
[0012] Optionally, a bypass air passage is formed in the suction pipe. The bypass air passage penetrates through the side wall of the upper air passage and is divided into inner and outer sections with the same central axis. The diameter of the inner section of the bypass air passage is larger than that of the outer section. A round sealing plate is arranged in the inner section. The diameter of the round sealing plate is larger than the outer section of the bypass air passage. A pull rod is fixed on the side of the round sealing plate facing the outer section of the bypass air passage. The pull rod extends out of the outer section of the bypass air passage and is fixed with an outer end head. A spring for driving the round sealing plate to abut against one end wall of the inner section of the bypass air passage is sleeved on a section of the pull rod extending out of the suction pipe. The outer end head is used for representing the negative pressure suction state by an action.
[0013] Optionally, the round sealing plate includes a frustum and a side sealing skin. The small end of the frustum faces the outer section of the bypass air passage. The inner section of the bypass air passage is adapted to the frustum and allows the frustum to move along the length direction. The side sealing skin is arranged around the side surface of the frustum, and the side sealing skin has elasticity.
[0014] Optionally, an elastic sheet is fixed at the lower end of the suction nozzle. The elastic sheet is used for contacting the tin ring.
[0015] Optionally, the machine head includes a telescopic cylinder and a mounting plate fixed at the rod end of the telescopic cylinder. The suction pipe is arranged on the mounting plate.
[0016] In summary, the present application includes the following beneficial technical effects: Instead of using mechanical jaws to pick up the tin ring, the suction nozzle of the suction pipe approaches the horizontally placed tin ring, and the tin ring is sucked onto the suction nozzle by the negative pressure formed by the suction of the suction pipe, and then the picking up is realized; compared with the method of grasping the tin ring, the suction nozzle occupies a small space and is relatively not easy to press other tin rings, and at the same time, the tin ring is negatively attached to the suction nozzle and is relatively not easy to deform. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a schematic diagram of the overall structure of the present application;
[0018] Figure 2 is a schematic longitudinal sectional structure diagram of the present application;
[0019] Figure 3 is Figure 2 an enlarged schematic view of part A of
[0020] Description of reference numerals: 1, machine head; 10, incomplete annular air hole; 11, telescopic cylinder; 12, mounting plate; 13, upper air duct; 14, lower air duct; 15, middle hole; 2, suction pipe; 21, connecting ring; 22, clamping plate; 23, bypass air duct; 3, vacuum extraction joint; 4, laser ranging probe; 5, round sealing plate; 51, pull rod; 52, outer end head. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] The following Figures 1-3 further describes the present application in detail with reference to the accompanying
[0022] The embodiment of the present application discloses a tin ring suction device applied to a laser automatic welding system.
[0023] Referring to Figure 1 , the tin ring suction device applied to the laser automatic welding system includes a machine head 1 and a suction pipe 2. Among them, the machine head 1 includes a telescopic cylinder 11 and a mounting plate 12. The telescopic cylinder 11 can be a pneumatic cylinder, an electric cylinder or a hydraulic cylinder, and its rod end is fixedly installed on the mounting plate 12 downward. The mounting plate 12 extends horizontally and protrudes from the side wall of the telescopic cylinder 11 for mounting the suction pipe 2; a vertical hole is opened at the protruding end of the mounting plate 12, and the suction pipe 2 is inserted into the vertical hole and positioned and locked by bolts to achieve fixation.
[0024] Referring to Figure 2 and Figure 3, a main air passage and an incomplete annular air hole 10 are formed along the central axis in the suction pipe 2. The main air passage is above, and the incomplete annular air hole 10 is below, and the two are interconnected. A vacuum extraction joint 3 is detachably connected to the upper end of the suction pipe 2. The lower end of the vacuum extraction joint 3 communicates with the main air passage, and the upper end communicates with the suction device through a pipeline. The inner diameter of the incomplete annular air hole 10 is larger than the inner diameter of the tin ring, and its outer diameter is smaller than the outer diameter of the tin ring. The lower end of the suction pipe 2 is formed into a nozzle. The incomplete annular air hole 10 is located inside the nozzle. The nozzle is tested to be in a frustum structure with the small end facing downwards for insertion into a narrow area.
[0025] According to the above settings, it is no longer necessary to grasp the tin ring with mechanical claws. Instead, the nozzle of the suction pipe 2 approaches the horizontally placed tin ring, and the tin ring is sucked onto the nozzle by the negative pressure formed by the suction of the suction pipe 2, and then the tin ring can be taken; compared with the method of grasping the tin ring, the nozzle occupies less space and is relatively less likely to press other tin rings. At the same time, the tin ring is attached to the nozzle by negative pressure and is relatively less likely to deform.
[0026] Refer to Figure 2 , the main air passage includes an upper air passage 13 and a lower air passage 14 which are distributed up and down and interconnected. Among them, the upper end of the upper air passage 13 is detachably connected to one end of the vacuum extraction joint 3; specifically, the lower end of the vacuum extraction joint 3 can be inserted into the upper end of the upper air passage 13, and it is preferably possible to fix a rubber ring at the inserted part of the lower end of the vacuum extraction joint 3 to enhance the airtight effect.
[0027] The diameter of the upper air passage 13 is larger than that of the lower air passage 14, and the diameter of the lower air passage 14 is larger than the outer diameter of the incomplete annular air hole 10.
[0028] The advantages of the above settings are as follows:
[0029] 1), the diameter of the upper air passage 13 makes the structural processing of the vacuum extraction joint 3 more difficult. After all, the smaller the upper air passage 13, the smaller the lower end size of the vacuum extraction joint 3;
[0030] 2), it is easier to generate the required negative pressure; because for a thick pipe and a thin pipe, when forming the same negative pressure suction volume, the latter is smaller.
[0031] It should be noted that the best structure for the nozzle to suck the tin ring is the annular air hole structure, that is, when the nozzle lands on the tin ring, there is negative pressure on the upper circle. However, this air hole structure cannot be formed because if the middle structure of this annular air hole structure is suspended, so the present application is an incomplete ring, that is, a C-shaped structure, and the smaller the opening of the C-shaped structure, the better.
[0032] In another embodiment, the suction pipe 2 is laterally extended above the nozzle to form a connecting ring 21, and a laser ranging probe 4 is detachably connected to the connecting ring 21. Specifically:
[0033] There is a C-shaped clamping plate 22, and a clamping groove adapted to the thickness of the connecting ring 21 is provided on the inner side of the clamping plate 22; the connecting ring 21 is inserted into the clamping groove of the clamping plate 22 to achieve connection, and is fixed by glue or welding; there is a through hole on the clamping plate 22, and a columnar laser ranging probe 4 is inserted into the through hole. The detection line of the laser ranging probe 4 inclines downward and intersects with the central axis of the incomplete annular air hole 10.
[0034] It can be understood that the detection line of the laser ranging probe 4 preferably passes below the suction nozzle.
[0035] According to the above settings, only by connecting the laser ranging probe 4 to the corresponding controller, it is possible to accurately judge whether the suction nozzle contacts the tin ring during the process of sucking the tin ring, so as to prevent the suction pipe 2 from moving downward excessively and pressing the tin ring.
[0036] Refer to Figure 3 , in another embodiment, a middle hole 15 is provided in the suction nozzle, and the upper end of the middle hole 15 is closed and located in the middle of the incomplete annular air hole 10.
[0037] Use scenario simulation:
[0038] 1). The tin rings are stacked in series on a preselected material rod. In this case, the material rod can be inserted into the middle hole 15 so that the suction nozzle can pick up multiple stacked tin rings; that is, the positions of the tin rings are relatively unified during storage, which is beneficial to ensuring that the suction nozzle can accurately suck up the tin rings.
[0039] 2). The suction nozzle slews the sucked tin ring onto the pin. In this case, the suction nozzle no longer releases the tin ring suspended above the pin, but can move downward to insert the pin into the middle hole 15 and then release the tin ring, so the slewing accuracy of the tin ring is higher.
[0040] 3). A positioning rod is inserted and fixed in the middle hole 15. The diameter of the section of the positioning rod extending out of the suction nozzle is adapted to the inner diameter of the tin ring, and the lower end of the positioning rod is a round head; in this case, the tin ring and the incomplete annular air hole 10 can be aligned more accurately to ensure the effect of sucking the tin ring by negative pressure.
[0041] In another embodiment, a bypass air passage 23 is provided on the suction pipe 2. The bypass air passage 23 penetrates the side wall of the upper air passage 13 and is divided into inner and outer sections with the same central axis. The bypass air passage 23 is as close as possible to the lower end of the upper air passage 13.
[0042] The inner diameter of the inner section of the bypass airway 23 is larger than that of the outer section. A circular sealing plate 5 is arranged in the inner section. The diameter of the circular sealing plate 5 is larger than that of the outer section of the bypass airway 23. A pull rod 51 is fixed on the side of the circular sealing plate 5 facing the outer section of the bypass airway 23. The pull rod 51 extends out from the outer section of the bypass airway 23 and is fixed with an outer end head 52. A spring for driving the circular sealing plate 5 to abut against the end wall of one end of the inner section of the bypass airway 23 is sleeved on a section of the pull rod 51 extending out of the suction pipe. That is, when the spring is in the natural state, it elongates so that the circular sealing plate 5 abuts against the corresponding wall surface outward. The spring is sleeved on the pull rod 51 and one end is fixed inside the outer end head 52, and the other end is fixed on the outer wall of the suction pipe 2.
[0043] According to the above settings, the outer end head 52 is used to represent the negative pressure suction state by its movement. For example: the outer end head is connected to the slider of a small sliding rheostat. In this case, it can be judged whether the tin ring has been sucked according to the resistance value of the sliding rheostat. Because after the tin ring closes the incomplete annular air hole, when the suction force is sufficient, the circular sealing plate 5 will be pulled inward, that is, the outer end head will move; and the suction force size can be judged according to the resistance value to adjust the negative pressure suction.
[0044] When necessary, a spring with appropriate elasticity can also be selected so that the tin ring will not be sucked and deformed under too large a suction force, that is, when the suction force is too large, the bypass airway 23 is opened.
[0045] Further, the circular sealing plate 5 includes a frustum and a side sealing skin. The small end of the frustum faces the outer section of the bypass airway 23. The inner section of the bypass airway 23 is adapted to the frustum and allows the frustum to move along the length direction. The side sealing skin is arranged around the side surface of the frustum and is adhesively fixed. The side sealing skin can be made of rubber and has elasticity.
[0046] The above settings are to enable the bypass airway 23 to be better sealed when it does not need to be opened, so as not to cause too much adverse effect on sucking the tin ring.
[0047] Further, an elastic sheet is fixed to the lower end surface of the suction nozzle by adhesion. The elastic sheet can be a thin rubber sheet and is used to contact the tin ring.
[0048] The setting of the elastic sheet can, on the one hand, reduce the probability of crushing the tin ring, and on the other hand, can reduce the adverse interference caused by the unevenness of the upper part of the tin ring to the negative pressure suction.
[0049] The above are all the preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore: all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.
Claims
1. A tin ring suction device applied to a laser automatic welding system, characterized in that: It includes a machine head (1) and a suction pipe (2). The suction pipe (2) is vertically installed on the machine head (1). The upper end of the suction pipe (2) is detachably connected with a vacuum suction joint (3), and the lower end is formed with a suction nozzle. A main air passage and an incomplete annular air hole (10) are formed in the suction pipe (2). The main air passage extends vertically and communicates with the upper end of the vacuum suction joint (3) and the incomplete annular air hole (10). The inner diameter of the incomplete annular air hole (10) is larger than the inner diameter of the tin ring, and its outer diameter is smaller than the outer diameter of the tin ring. The incomplete annular air hole (10) is located in the suction nozzle. The suction nozzle is in a frustum structure in side view with the small end facing downwards.
2. The tin ring suction device applied to the laser automatic welding system according to claim 1, characterized in that: The main air passage includes an upper air passage (13) and a lower air passage (14) which are vertically distributed and communicated. The upper end of the upper air passage (13) is detachably connected with one end of the vacuum suction joint (3). The diameter of the upper air passage (13) is larger than that of the lower air passage (14), and the diameter of the lower air passage (14) is larger than the outer diameter of the incomplete annular air hole (10).
3. The tin ring suction device applied to the laser automatic welding system according to claim 1, characterized in that: The suction pipe (2) is provided with a connecting ring (21) above the suction nozzle. A laser ranging probe (4) is detachably connected to the connecting ring (21). The detection line of the laser ranging probe (4) inclines downwards and intersects with the central axis of the incomplete annular air hole (10).
4. The tin ring suction device applied to the laser automatic welding system according to claim 2, characterized in that: A middle hole (15) is formed in the suction nozzle. The upper end of the middle hole (15) is closed and located in the middle of the incomplete annular air hole (10). The middle hole (15) is used for sleeving a rod for threading multiple tin rings, pins, or inserting a positioning rod. The diameter of the section of the positioning rod extending out of the suction nozzle is adapted to the inner diameter of the tin ring, and the lower end of the positioning rod is a round head.
5. The tin ring suction device applied to the laser automatic welding system according to claim 2, wherein: A bypass air passage (23) is formed in the suction pipe (2). The bypass air passage (23) penetrates through the side wall of the upper air passage (13) and is divided into inner and outer sections with the same central axis. The inner diameter of the inner section of the bypass air passage (23) is larger than that of the outer section. A round sealing plate (5) is arranged in the inner section. The diameter of the round sealing plate (5) is larger than that of the outer section of the bypass air passage (23). A pull rod (51) is fixed on the side of the round sealing plate (5) facing the outer section of the bypass air passage (23). The pull rod (51) extends out of the outer section of the bypass air passage (23) and is fixed with an outer end head (52). A spring for driving the round sealing plate (5) to abut against one end wall of the inner section of the bypass air passage (23) is sleeved on the section of the pull rod (51) extending out of the suction pipe (2). The outer end head (52) is used to represent the negative pressure suction state by its movement.
6. The tin ring suction device applied to the laser automatic welding system according to claim 5, characterized in that: The round sealing plate (5) includes a frustum and a side sealing skin. The small end of the frustum faces the outer section of the bypass air passage (23). The inner section of the bypass air passage (23) is adapted to the frustum and allows the frustum to move along the length direction. The side sealing skin is arranged around the side surface of the frustum, and the side sealing skin has elasticity.
7. The tin ring suction device applied to the laser automatic welding system according to claim 5, characterized in that: An elastic sheet is fixed at the lower end of the suction nozzle, and the elastic sheet is used to contact the tin ring.
8. The tin ring suction device applied to the laser automatic welding system according to claim 1, characterized in that: The machine head (1) includes a telescopic cylinder (11) and a mounting plate (12) fixed to the rod end of the telescopic cylinder (11). The suction pipe (2) is arranged on the mounting plate (12).