Ultrasonic sealing welding mechanism

Abstract

An ultrasonic sealing and welding mechanism comprises an air cylinder, an ultrasonic welding head and a Y-axis linear sliding table, a Z-axis linear sliding table is installed on a sliding table of the Y-axis linear sliding table, and an installation plate frame is fixed to a sliding table of the Z-axis linear sliding table, and is characterized in that a driving sliding plate and a driven sliding plate are installed on the installation plate frame in a sliding mode through two sliding rails; the air cylinder is fixed to one side of the horizontal plate face of the installation plate frame through an air cylinder support, the output end of the air cylinder is coaxially connected with a push rod sleeve and connected with the driving sliding plate in a clamped mode through the push rod sleeve, a screw penetrates through the driven sliding plate, and one end of the screw is in threaded connection with the driving sliding plate and locked through an adjusting lock nut. A pressure spring is sleeved on the screw rod between the adjusting lock nut and the driven sliding plate, and the ultrasonic welding head is fixed on the driven sliding plate through a clamp; and a limiting assembly is fixed on the other side of the mounting plate frame. The ultrasonic welding head has the beneficial effects of being simple in structure and capable of guaranteeing that pressure exerted on products by the ultrasonic welding head is consistent, so that welding consistency of the products is guaranteed.

Description

Technical Field

[0001] The utility model relates to a welding mechanism, in particular to an ultrasonic sealing and welding mechanism. Background Art

[0002] At present, a conical air hole for discharging the gas expanded by heat during the high-temperature curing process of the silica gel inside the carbon brush holder cavity is provided at the center of the chip cover of the vehicle-mounted alternator regulator. A conical platform is provided on the outer surface of the chip cover corresponding to the periphery of the conical air hole. After the silica gel inside the carbon brush holder cavity is cured, the conical platform is heated and melted by the action of the high-frequency vibration friction of the ultrasonic welding mechanism, so as to block the air hole and achieve the effect of internal sealing of the carbon brush holder.

[0003] In the past, the force exerted by the ultrasonic welding head of the ultrasonic welding mechanism on the product was directly given by the air cylinder. During the process of the air cylinder conducting the force to the ultrasonic welding head, due to the instability of many factors such as the air source air pressure, air path leakage or blockage, the consistency of the pressure exerted by the ultrasonic welding head on the product was affected, thus affecting the consistency of the ultrasonic welding state. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an ultrasonic sealing and welding mechanism with a simple structure, which can ensure the consistency of the pressure exerted by the ultrasonic welding head on the product, thereby ensuring the consistency of product welding.

[0005] The technical solution of the utility model is as follows:

[0006] An ultrasonic sealing and welding mechanism includes an air cylinder, an ultrasonic welding head and a horizontally arranged Y-axis linear slide. A vertically arranged Z-axis linear slide is installed on the slide of the Y-axis linear slide. A mounting plate frame is fixed on the slide of the Z-axis linear slide. The special feature is that: a driving slide and a driven slide are slidably installed on the mounting plate frame through two slide rails. The air cylinder is fixed on one side of the horizontal plate surface of the mounting plate frame through an air cylinder bracket. The output end of the piston rod of the air cylinder is coaxially connected with a push rod sleeve and is clamped with the driving slide through the push rod sleeve. A screw rod is passed through the driven slide. One end of the screw rod is threadedly connected with the driving slide and is locked by an adjustment lock nut. A pressure spring is sleeved on the screw rod between the adjustment lock nut and the driven slide. The ultrasonic welding head is fixed on the driven slide through a clamp;

[0007] A limiting component is fixed on the other side of the mounting plate frame for realizing the sliding limit of the driven slide.

[0008] As a further preference, the pressure spring is kept in a pre-compressed state by pre-adjusting the screw rod and the adjustment lock nut, so that the initial force value when the product is pressed is the optimal force value for ultrasonic welding.

[0009] As a further preference, the mounting plate frame is L-shaped.

[0010] As a further preference, the active slide plate and the driven slide plate are respectively slidably mounted on two slide rails through two sliders.

[0011] As a further preference, both the Y-axis linear slide and the Z-axis linear slide are manual slide tables.

[0012] As a further preference, the limiting component includes a limiting vertical plate fixed on the horizontal plate surface of the mounting plate frame on the other side. A limiting screw is threadedly connected to the limiting vertical plate and locked by a nut.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. Since a pressure spring is sleeved between the adjusting lock nut and the driven slide plate on the screw, and the ultrasonic welding head is fixed on the driven slide plate through a fixture; by pre-adjusting the compression amount of the pressure spring to keep it in a pre-compressed state, the initial force value when the product is compressed is the optimal force value for ultrasonic welding, that is, the output force value can be adjusted and can be kept linear and stable.

[0015] 2. The cylinder is used in cooperation with the pressure spring to apply pressure to the ultrasonic welding head. By utilizing the stable characteristic of the spring elasticity, it can ensure that the pressure exerted by the ultrasonic welding head on the product is consistent, thereby ensuring the welding consistency of the product. The device has a simple structure and is convenient for maintenance. Description of the Drawings

[0016] Figure 1 is a three-dimensional structural schematic diagram of the present utility model.

[0017] Figure 2 is Figure 1 the top view of

[0018] Figure 3 is Figure 2 the partial sectional view taken along line A-A of

[0019] In the figure: Z-axis linear slide 1, Y-axis linear slide 2, cylinder 3, active slide plate 4, pressure spring 5, driven slide plate 6, slide rail 7, fixture 8, limiting component 9, ultrasonic welding head 10, product 11, product tooling 12, mounting plate frame 13, push rod sleeve 14, cylinder bracket 15, screw 16, adjusting lock nut 17, push rod pressing block 18. Detailed Embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] As Figures 1 - 3 shown, an ultrasonic sealing and welding mechanism related to the present utility model includes a Y-axis linear slide table 2 arranged horizontally. On the slide table of the Y-axis linear slide table 2, a Z-axis linear slide table 1 arranged vertically is installed. On the slide table of the Z-axis linear slide table 1, an L-shaped mounting plate frame 13 is fixed by screws. On the horizontal plate surface of the mounting plate frame 13, a driving slide plate 4 and a driven slide plate 6 are slidably installed through two parallel rails 7. The driving slide plate 4 and the driven slide plate 6 are respectively slidably installed on the two rails 7 through two sliders.

[0022] On one side of the horizontal plate surface of the mounting plate frame 13, a cylinder 3 is fixed by an L-shaped cylinder bracket 15 fixed by screws. The cylinder 3 is arranged along the X-axis direction, and the output end of the piston rod of the cylinder 3 is coaxially inserted with a push rod sleeve 14 through screws, and is clamped with the driving slide plate 4 through the push rod sleeve 14. On the side of the driving slide plate 4 corresponding to the cylinder 3, a push rod pressing block 18 is fixed by screws. The large head end of the push rod sleeve 14 is clamped into a stepped U-shaped card slot arranged in the middle of the push rod pressing block 18 to drive the driving slide plate 4 to slide.

[0023] A screw rod 16 is passed through a stepped hole in the middle of the driven slide plate 6. The small head end of the screw rod 16 is threadedly connected with the driving slide plate 4 and locked by an adjusting lock nut 17. The large head end of the screw rod 16 is stuck in the stepped hole. A pressure spring 5 is sleeved on the screw rod 16 between the adjusting lock nut 17 and the driven slide plate 6. The pressure spring 5 is kept in a pre-compressed state by pre-adjusting the screw rod 16 and the adjusting lock nut 17, so that the initial force value when the product is pressed is the optimal force value for ultrasonic welding.

[0024] On the other side of the mounting plate frame 13, a limiting component 9 is fixed to realize the sliding limit of the driven slide plate 6. The limiting component 9 includes a limiting vertical plate 901 fixed on the horizontal plate surface of the mounting plate frame 13 on the other side. On the limiting vertical plate 901, a limiting screw rod 903 is threadedly connected and locked by a nut 902.

[0025] An ultrasonic welding head 10 is fixed on the driven slide plate 6 through a fixture 8; the fixture 8 is formed by connecting an upper clamping sleeve and a lower clamping sleeve through screws. Both the Y-axis linear slide table 2 and the Z-axis linear slide table 1 are manual slide tables to reduce costs.

[0026] During operation, the ultrasonic welding head 10 is adjusted by the Y-axis linear slide 2 and the Z-axis linear slide 1 so that the front end of the ultrasonic welding head 10 is aligned with the conical table provided around the conical air hole on the outer surface of the product 11 (i.e., the chip cover) mounted on the product tooling 12. The control cylinder 3 is activated to drive the active slide 4 to slide forward, and the pressure spring 5 is used to push the driven slide 6 to drive the ultrasonic welding head 10 to move forward along the slide rail 7 together.

[0027] When the front end of the ultrasonic welding head 10 contacts the product, the cylinder 3 still continues to push the active slide 4 forward. While the driven slide 6 moves forward, it receives a backward reaction force from the product, causing the pressure spring 5 to be compressed. The pressure spring 5 is pre-adjusted to maintain a pre-compressed state all the time, so that the initial force value when the pressure spring 5 is compressed is the optimal force value for ultrasonic welding of the product. At this time, the ultrasonic welding head 10 is activated, and the pre-sealed part of the product begins to melt due to the action of high-frequency vibration friction. As the pre-sealed part of the product continues to melt, the ultrasonic welding head 10 continues to advance, but the compression amount of the pressure spring 5 remains unchanged, that is, the pressure exerted by the ultrasonic welding head 10 on the product surface remains unchanged. Until the driven slide 6 abuts against the limit screw, the ultrasonic welding head 10 stops moving and no longer applies pressure to the product.

[0028] After the ultrasonic welding is completed, the cylinder 3 is used to pull the active slide 4 and the screw is used to pull the driven slide 6 together with the ultrasonic welding head 10 to move backward along the slide rail 7 to reset the mechanism.

[0029] Although the embodiments of the present invention have been disclosed as above, it is not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily achieved. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated and described examples here.

Claims

1. An ultrasonic sealing and welding mechanism, comprising a cylinder, an ultrasonic welding head and a horizontally arranged Y-axis linear slide. A vertically arranged Z-axis linear slide is installed on the slide of the Y-axis linear slide, and a mounting plate frame is fixed on the slide of the Z-axis linear slide. It is characterized in that: An active slide plate and a driven slide plate are slidably mounted on a mounting plate frame through two slide rails. The cylinder is fixed to one side of the horizontal plate surface of the mounting plate frame through a cylinder bracket. The output end of the piston rod of the cylinder is coaxially connected with a push rod sleeve and is clamped with the active slide plate through the push rod sleeve. A screw rod is penetrated through the driven slide plate. One end of the screw rod is threadedly connected with the active slide plate and is locked through an adjusting lock nut. A pressure spring is sleeved on the screw rod between the adjusting lock nut and the driven slide plate. The ultrasonic welding head is fixed to the driven slide plate through a fixture. A limiting component is fixed on the other side of the mounting plate frame for realizing sliding limitation of the driven slide plate.

2. The ultrasonic sealing and welding mechanism according to claim 1, characterized in that: The pressure spring is kept in a pre-compressed state through a pre-adjusting screw rod and an adjusting lock nut, so that the initial force value of the product when being pressed is the optimal force value for ultrasonic welding.

3. The ultrasonic sealing and welding mechanism according to claim 1, characterized in that: The mounting plate frame is L-shaped.

4. The ultrasonic sealing and welding mechanism according to claim 1, characterized in that: The active slide plate and the driven slide plate are respectively slidably mounted on the two slide rails through two sliders.

5. The ultrasonic sealing and welding mechanism according to claim 1, characterized in that: Both the Y-axis linear slide table and the Z-axis linear slide table are manual slide tables.

6. An ultrasonic sealing and welding mechanism according to claim 1 or 3, characterized in that: The limiting component includes a limiting vertical plate fixed on the horizontal plate surface of the mounting plate frame on the other side. A limiting screw rod is threadedly connected to the limiting vertical plate and is locked through a nut.

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