WO2022253168A1

WO2022253168A1 - Machine head assembly of ultrasonic welding machine, and ultrasonic welding machine

Info

Publication number: WO2022253168A1
Application number: PCT/CN2022/095905
Authority: WO
Inventors: 王森城; 刘义超; 叶润洲
Original assignee: 珠海灵科自动化科技有限公司
Priority date: 2021-05-31
Filing date: 2022-05-30
Publication date: 2022-12-08
Also published as: CN113210834A

Abstract

A machine head assembly (1) of an ultrasonic welding machine, and the ultrasonic welding machine. The machine head assembly (1) of an ultrasonic welding machine comprises a main control circuit, a lifting support (11), a vibration generating cylinder (12), a vibration generating cylinder driving device (13), and a stroke fine-adjustment assembly (14), wherein the vibration generating cylinder driving device (13) is electrically connected to the main control circuit; the vibration generating cylinder (12), the vibration generating cylinder driving device (13) and the stroke fine-adjustment assembly (14) are all mounted on the lifting support (11); the vibration generating cylinder driving device (13) drives the vibration generating cylinder (12) to move on the lifting support (11) in a vertical direction; the stroke fine-adjustment assembly (14) limits the stroke of the vibration generating cylinder (12); and the stroke fine-adjustment assembly (14) comprises a fine-adjustment seat (141), a fine-adjustment stop block (142), a fine-adjustment rod (143) and a fine-adjustment cushion block (144), the fine-adjustment seat (141) being mounted on the vibration generating cylinder (12), the fine-adjustment stop block (142) being connected to the fine-adjustment seat (141) by means of the fine-adjustment rod (143) in an adjustable manner, the fine-adjustment cushion block (144) being mounted on the lifting support (11), the fine-adjustment stop block (142) being provided with a limiting portion (1422), and the limiting portion (1422) mating with the fine-adjustment cushion block (144).

Description

Ultrasonic welding machine head assembly and ultrasonic welding machine

technical field

The present invention relates to the technical field of ultrasonic welding machines, in particular to a head assembly of an ultrasonic welding machine, and to an ultrasonic welding machine using the head assembly.

Background technique

The stroke adjustment of the upper mold of the existing high-power ultrasonic welding machine is very rough and has poor stability, and the adjusted value cannot be visualized. The fine-tuning depends on the collision between the vibrating cylinder and the fine-tuning structure to stop the action. The force of the large cylinder is very strong. Without deceleration and collision with the fine-tuning components, it is easy to cause damage to the fine-tuning structure and the casting structure. In the past, high-precision fine-tuning structures were only used on low-power plastic welding machines. Because of the high pressure of high-power plastic welding machines, if the previous fine-tuning structures were used in high-power ultrasonic plastic welding machines, they would be damaged and affect welding. Therefore, the precision fine-tuning of general plastic welding machines is not applicable to the structure of high-power ultrasonic plastic welding machines, and a new precision fine-tuning structure needs to be developed.

technical problem

The first object of the present invention is to provide a head assembly of an ultrasonic welding machine that improves stroke adjustment accuracy.

The second object of the present invention is to provide an ultrasonic welding machine with improved stroke adjustment accuracy.

technical solution

In order to achieve the above-mentioned first purpose, the head assembly of the ultrasonic welding machine provided by the present invention includes a main control circuit, a lifting bracket, a vibrating cylinder, a vibrating cylinder driving device and a stroke fine-tuning assembly, and the vibrating cylinder driving device and the main control circuit circuit Connection, the vibration cylinder, the vibration cylinder driving device and the stroke fine-tuning assembly are all installed on the lifting bracket, the vibration cylinder driving device drives the vibration cylinder to move in the vertical direction on the lifting bracket, and the stroke fine-tuning assembly limits the stroke of the vibration cylinder ;The stroke fine-tuning assembly includes a fine-tuning seat, a fine-tuning block, a fine-tuning rod and a fine-tuning pad, the fine-tuning seat is installed on the vibration cylinder, the fine-tuning block is adjustable connected with the fine-tuning seat through the fine-tuning rod, and the fine-tuning pad is installed on the lifting bracket , the fine-tuning block is provided with a limit portion, and the limit portion is set in cooperation with the fine-tuning pad.

In a further solution, the nose assembly also includes a nose shell, and the nose shell is installed on the lifting bracket; the nose shell is provided with a scale through slot, and the fine-tuning block is provided with a fine-tuning pointer, and the fine-tuning pointer is set in cooperation with the scale through slot.

In a further solution, the fine-tuning seat is provided with a limiting groove, and the fine-tuning block is slidably arranged in the limiting groove.

In a further solution, the fine-tuning stop is arranged in close contact with the bottom wall of the limiting groove.

In a further solution, the fine-tuning rod includes a fine-tuning knob, a fine-tuning screw and a fine-tuning sleeve, the fine-tuning knob is installed on the first end of the fine-tuning screw, the second end of the fine-tuning screw is installed on the fine-tuning block, and the fine-tuning sleeve is set on On the fine-tuning screw rod, the fine-tuning screw rod is installed on the fine-tuning seat through the fine-tuning bushing.

In a further solution, scales are provided on the peripheral wall of the fine-tuning knob.

In a further solution, the head assembly also includes a travel switch, which is electrically connected to the main control circuit; the fine-tuning block is provided with a switch contact part, and the switch contact part is arranged in cooperation with the travel switch.

In a further solution, the contact part of the switch includes an impact slope and a maintenance plane, and the maintenance plane and the impact slope are sequentially distributed downward from the top of the fine-tuning block.

In a further solution, the machine head assembly also includes a speed-limiting spring, the first end of the speed-limiting spring is connected to the lifting bracket, the second end of the speed-limiting spring is connected to the vibrating cylinder, and the stretching direction of the speed-limiting spring is connected to the direction of the vibrating cylinder. The direction of motion is the same.

In order to achieve the above-mentioned second purpose, the ultrasonic welding machine provided by the present invention is provided with a head assembly, and the above-mentioned head assembly is used for the head assembly.

Beneficial effect

The head assembly of the ultrasonic welding machine of the present invention can fine-tune the stroke of the vibrating cylinder by setting the stroke fine-tuning component, improve the accuracy of stroke adjustment, ensure the distance between the vibrating cylinder and the workpiece to be welded, and avoid overpressure. At the same time, the setting of the fine-tuning pad can prevent the fine-tuning block from colliding with the lifting bracket due to excessive speed during the pressing down process of the vibrating cylinder, which will cause damage to the stroke fine-tuning components and affect the welding accuracy.

In addition, by setting the fine-tuning pointer to cooperate with the scale through groove, when adjusting the range fine-tuning component, the distance of the fine-tuning can be visualized more intuitively, which is convenient for the user to operate.

In addition, by setting the limit groove, the fine-tuning block slides in the limit groove, which can prevent the fine-tuning block from rotating along the fine-tuning rod, so that the limit part of the fine-tuning block cannot cooperate with the fine-tuning pad to limit the position when it is pressed down. .

In addition, the fine-tuning block is arranged in close contact with the bottom wall of the limit groove, which can avoid the problem that the fine-tuning block is tilted after the limit part is attached to the fine-tuning pad, which leads to a decrease in stroke accuracy.

In addition, the fine-tuning lever includes a fine-tuning knob, a fine-tuning screw rod and a fine-tuning bushing, and the fine-tuning knob can be rotated and adjusted to facilitate control of adjustment accuracy.

In addition, the outer peripheral wall of the fine-tuning knob is provided with scales, which can facilitate the visualization of the fine-tuning distance.

In addition, by setting the limit switch to cooperate with the switch contact part of the fine-adjustment block, the moving distance of the fine-adjustment block can be detected. After the limit switch is activated, the deceleration control of the driving device of the vibrating cylinder can be carried out through the main control circuit. Avoid excessive speed when the fine adjustment stop is in contact with the lifting bracket.

In addition, the contacting portion of the switch is provided with an impact slope, which can provide cushioning when the travel switch contacts the contacting portion of the switch, and avoid damage to the travel switch. Setting the maintenance plane can keep the limit switch in working condition.

In addition, by setting the speed-limiting spring to connect the lifting bracket and the vibrating cylinder, it can decelerate when the vibrating cylinder is pressed down, so as to avoid excessive speed when the fine-tuning block contacts the lifting bracket. Drive unit free fall damages product when power is lost.

Description of drawings

Fig. 1 is a structural diagram of an embodiment of an ultrasonic welding machine of the present invention.

Fig. 2 is a structural diagram of the head assembly installed on the column in the embodiment of the ultrasonic welding machine of the present invention.

Fig. 3 is an exploded view of the structure of the head assembly hiding the head shell in the embodiment of the ultrasonic welding machine of the present invention.

Fig. 4 is a structural cross-sectional view of the head assembly hiding the head shell in the embodiment of the ultrasonic welding machine of the present invention.

Fig. 5 is an exploded view of the stroke fine adjustment assembly in the embodiment of the ultrasonic welding machine of the present invention.

Fig. 6 is an exploded view of the structure of the fine-tuning rod in the embodiment of the ultrasonic welding machine of the present invention.

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Embodiments of the present invention

As shown in Figure 1, in this embodiment, the ultrasonic welding machine includes a head assembly 1, a column 2 and a base 3, the column 2 is vertically installed on the base 3, and the head assembly 1 is installed in a vertical motion Column 2.

Referring to Fig. 2, the machine head assembly 1 includes a main control circuit (not shown), a lifting bracket 11, a vibrating cylinder 12, a vibrating cylinder driving device 13, a travel fine-tuning assembly 14 and a travel switch 15, and the lifting bracket 11 is installed on the column 2 Above, the vibrating cylinder driving device 13 is electrically connected with the main control circuit, the vibrating cylinder 12, the vibrating cylinder driving device 13, the stroke fine-tuning assembly 14 and the travel switch 15 are all installed on the lifting bracket 11, and the vibrating cylinder driving device 13 drives The vibrating cylinder 12 moves vertically on the elevating support 11 , and the travel fine adjustment assembly 14 limits the stroke of the vibrating cylinder 12 . The vibrating cylinder 12 is used to install and fix the transducer assembly 124 , and the driving device 13 of the vibrating cylinder can use a motor or a cylinder. In this embodiment, the driving device 13 of the vibrating cylinder is a cylinder.

Referring to Fig. 3 and Fig. 4, the vibrating cylinder driving device 13 is detachably installed on the top platform 111 of the lifting bracket 11, the top platform 111 is provided with a driving rod through hole 112, and the driving rod 131 of the vibrating cylinder driving device 13 passes through the driving rod through hole 112. The hole 112 is connected with the vibrating cylinder 12 . The vibrating cylinder 12 is installed on the lifting support 11 through the guide rail assembly 114 . The head assembly 1 also includes a speed-limiting spring 16, the first end of the speed-limiting spring 16 is connected with the elevating support 11, the second end of the speed-limiting spring 16 is connected with the vibrating tube 12, and the stretching direction of the speed-limiting spring 16 is connected with the vibration The direction of movement of the cartridge 12 is the same. In this embodiment, the speed-limiting spring 16 is installed on the lifting bracket 11 through the fixed column 17, and the speed-limiting spring 16 is installed on the vibrating cylinder 12 through the stud 18. The top platform 111 is provided with a fixed column installation hole 113, and the fixed column 17 Installed in the mounting hole 113 of the fixed column, the velocity limiting spring 16 is located in the transducer cavity 123 of the vibrating cylinder 12 . The quantity of velocity limiting spring 16 is two.

It can be seen from Fig. 3 that the stroke fine-tuning assembly 14 includes a fine-tuning seat 141, a fine-tuning block 142, a fine-tuning rod 143 and a fine-tuning pad 144, the fine-tuning seat 141 is installed on the vibrating cylinder 12, and the fine-tuning block 142 is connected to the fine-tuning seat by the fine-tuning rod 143. 141 adjustable connection, the fine-tuning block 144 is installed on the lifting bracket 11, the fine-tuning block 142 is provided with a limit portion 1422, and the limit portion 1422 is formed by extending from the top of the fine-tuning block 142, the limit portion 1422 and the fine-tuning block 144 fits set.

5 and 6, the fine-tuning rod 143 includes a fine-tuning knob 1431, a fine-tuning screw 1432 and a fine-tuning bushing 1433, the fine-tuning knob 1431 is installed on the first end of the fine-tuning screw 1432, and the second end of the fine-tuning screw 1432 is installed on the fine-tuning On the block 142 , the fine-tuning bushing 1433 is set on the fine-tuning screw rod 1432 , and the fine-tuning screw rod 1432 is installed on the fine-tuning seat 141 through the fine-tuning bushing 1433 . In this embodiment, the fine-tuning seat 141 is provided with a fine-tuning rod through hole 1411 and a fastening screw hole 1412. A fastening bolt 145 is installed in the fastening screw hole 1412, and the fastening bolt 145 is used for fixing the fine-tuning screw rod 1432. The fine-tuning block 142 is provided with a fine-tuning rod screw hole 1421 , and the threaded part 1435 of the fine-tuning screw rod 1432 is screwed into the fine-tuning rod screw hole 1421 . The outer peripheral wall of the fine-tuning knob 1431 is provided with a scale. In this embodiment, the outer peripheral wall of the fine-tuning knob 1431 is provided with a scale of 100 equal divisions. The fine-tuning seat 141 is also provided with a limiting groove 1413 , and the fine-tuning stopper 142 is slidably disposed in the limiting groove 1413 , and the fine-tuning stopper 142 is fitted to the bottom wall of the limiting groove 1413 . By setting the limit groove 1413, the fine adjustment block 142 slides in the limit groove, which can prevent the fine adjustment block 142 from rotating along the fine adjustment rod, so that the limit part 1422 of the fine adjustment block 142 cannot be in contact with the fine adjustment pad when pressing down. 144 cooperates with the limit, and at the same time, the fine-tuning block 142 is fitted with the bottom wall 1414 of the limit groove 1413, which can prevent the fine-tuning block 142 from warping after the limit portion 1422 is fitted with the fine-tuning pad 144, resulting in a reduction in stroke accuracy. question.

It can be known from Fig. 2 and Fig. 3 that the head assembly 1 further includes a travel switch 15, which is electrically connected to the main control circuit. As can be seen from FIG. 5 , the fine adjustment block 142 is provided with a switch contact portion 1423 , and the switch contact portion 1423 is arranged in cooperation with the travel switch 15 . The switch contact portion 1423 includes a bumping slope 1424 and a maintaining plane 1425 , and the maintaining plane 1425 and the bumping slope 1424 are sequentially distributed from the top of the fine-tuning block 142 downwards. By setting the travel switch 15 to cooperate with the switch contact part 1423 of the fine-tuning block 12, the moving distance of the fine-tuning block 142 can be detected. Carry out deceleration control to avoid damage to the device due to excessive speed when the fine-tuning block 142 contacts the lifting bracket 11.

As can be seen from FIG. 1 , the nose assembly 1 further includes a nose shell 19 installed on the lifting bracket 11 , and the nose shell 19 is provided with a scale through groove 191 . As can be seen from FIG. 5 , the fine-tuning block 142 is provided with a fine-tuning pointer 146 and a pointer mounting groove 1426 , the fine-tuning pointer 146 is installed in the pointer mounting groove 1426 , and the fine-tuning pointer 146 is set in cooperation with the scale through groove 191 .

When the ultrasonic welding machine of this embodiment is adjusting the stroke, it first moves the elevating bracket 11 so that the distance between the vibrating cylinder 12 and the workpiece to be welded is close to a certain distance and then the elevating bracket 11 is fixed. 12 to adjust the stroke, when adjusting the stroke fine-tuning assembly 14, use the 100 equal division scale on the circumference of the fine-tuning knob 1431 and the height scale of the scale through groove 191 to carry out adjustment and observation, which can more intuitively visualize the distance of fine-tuning and improve precision. When the ultrasonic welding machine is working, the vibrating cylinder driving device 13 drives the vibrating cylinder 12 to move. When the vibrating cylinder 12 moves downward, the fine-tuning stopper 142 moves downward along with the vibrating cylinder 12. When the fine-tuning stopper 142 When the switch contact part 1423 triggers the travel switch 15, the main control circuit controls the vibrating cylinder driving device 13 to decelerate, so as to avoid damage to the device due to excessive speed when the fine-tuning stopper 142 contacts the lifting bracket 11.

As can be seen from the above, the head assembly 1 of the ultrasonic welding machine of the present invention can fine-tune the stroke of the vibrating cylinder 12 by setting the stroke fine-tuning component 14, improve the accuracy of stroke adjustment, ensure the distance between the vibrating cylinder 12 and the workpiece to be welded, and avoid overvoltage. At the same time, setting the fine-tuning block 144 can prevent the fine-tuning block 142 from colliding with the lifting bracket 11 too fast during the pressing down process of the vibrating cylinder 12, causing damage to the stroke fine-tuning assembly 14 and affecting the welding accuracy.

It should be noted that the above are only preferred embodiments of the present invention, but the design concept of the invention is not limited thereto, and any non-essential modifications made to the present invention by using this concept also fall within the scope of protection of the present invention Inside.

Industrial Applicability

The head assembly of the ultrasonic welding machine and the ultrasonic welding machine of the present invention are suitable for the application occasions of ultrasonic welding. By using the product of the present invention, the stroke of the vibration cylinder can be fine-tuned through the stroke fine-tuning assembly, so as to improve the accuracy of stroke adjustment and ensure vibration. Keep the distance between the cylinder and the workpiece to be welded to avoid overpressure. The invention not only brings convenience to people, but also greatly improves the precision of the ultrasonic welding machine by setting the stroke fine-tuning component.

Claims

A head assembly of an ultrasonic welding machine, characterized in that it includes a main control circuit, a lifting bracket, a vibrating cylinder, a driving device for the vibrating cylinder, and a stroke fine-tuning assembly, and the driving device for the vibrating cylinder is electrically connected to the main control circuit connected, the vibrating cylinder, the vibrating cylinder driving device and the stroke fine-tuning assembly are all installed on the lifting bracket, and the vibrating cylinder driving device drives the vibrating cylinder to move vertically on the lifting bracket. directional movement, the stroke fine-tuning assembly limits the stroke of the vibrating cylinder;

The stroke fine-tuning assembly includes a fine-tuning seat, a fine-tuning block, a fine-tuning rod and a fine-tuning pad, the fine-tuning seat is installed on the vibration cylinder, and the fine-tuning block is adjustable through the fine-tuning rod and the fine-tuning seat type connection, the fine-tuning block is installed on the lifting bracket, and the fine-tuning block is provided with a limit portion, and the limit portion is set in cooperation with the fine-adjustment block.
The head assembly of the ultrasonic welding machine according to claim 1, characterized in that:

The nose assembly also includes a nose shell, and the nose shell is installed on the lifting bracket;

The machine head shell is provided with a scale through slot, and the fine-tuning block is provided with a fine-tuning pointer, and the fine-tuning pointer is set in cooperation with the scale through slot.
The head assembly of the ultrasonic welding machine according to claim 2, characterized in that:

The fine-tuning seat is provided with a limiting groove, and the fine-tuning block is slidably arranged in the limiting groove.
The head assembly of the ultrasonic welding machine according to claim 3, characterized in that:

The fine-tuning block is arranged in close contact with the bottom wall of the limiting groove.
The head assembly of an ultrasonic welding machine according to any one of claims 1 to 4, characterized in that:

The fine-tuning rod includes a fine-tuning knob, a fine-tuning screw and a fine-tuning sleeve, the fine-tuning knob is installed on the first end of the fine-tuning screw, and the second end of the fine-tuning screw is installed on the fine-tuning block, The fine-tuning bushing is sleeved on the fine-tuning screw rod, and the fine-tuning screw rod is installed on the fine-tuning seat through the fine-tuning bushing.
The head assembly of the ultrasonic welding machine according to claim 5, characterized in that:

The outer peripheral wall of the fine-tuning knob is provided with scales.
The head assembly of an ultrasonic welding machine according to any one of claims 1 to 4, characterized in that:

The head assembly also includes a travel switch, the travel switch is electrically connected to the main control circuit;

The fine-tuning block is provided with a switch contact part, and the switch contact part is arranged in cooperation with the travel switch.
The head assembly of the ultrasonic welding machine according to claim 7, characterized in that:

The switch contact portion includes a striking inclined plane and a maintaining plane, and the maintaining plane and the impacting inclined plane are sequentially distributed downward from the top of the fine-tuning block.
The head assembly of an ultrasonic welding machine according to any one of claims 1 to 4, characterized in that:

The machine head assembly also includes a speed-limiting spring, the first end of the speed-limiting spring is connected with the lifting bracket, the second end of the speed-limiting spring is connected with the vibration cylinder, and the speed-limiting spring The stretching direction is the same as the moving direction of the vibrating cylinder.
An ultrasonic welding machine provided with a head assembly, characterized in that the head assembly according to any one of claims 1 to 9 is applied to the head assembly.