Ultrasonic welding machine head assembly and ultrasonic welding machine

Abstract

The present invention provides a head assembly of an ultrasonic welding machine and an ultrasonic welding machine. The head assembly of the ultrasonic welding machine includes a main control circuit, a lifting bracket, a vibration tube, a vibration tube driving device and a stroke fine-tuning assembly. The vibration tube driving device is electrically connected to the main control circuit. The vibration tube, the vibration tube driving device and the stroke fine-tuning assembly are all installed on the lifting bracket. The vibration tube driving device drives the vibration tube to move in a vertical direction on the lifting bracket. The stroke fine-tuning assembly limits the stroke of the vibration tube. 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 tube. The fine-tuning block is adjustably connected to the fine-tuning seat through the fine-tuning rod. The fine-tuning pad is installed on the lifting bracket. The fine-tuning block is provided with a limiting portion, and the limiting portion is provided in cooperation with the fine-tuning pad. The ultrasonic welding machine uses the head assembly. The head assembly of the ultrasonic welding machine using the present invention can improve the stroke adjustment accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrasonic welding machines, in particular to a head assembly of an ultrasonic welding machine, and also to an ultrasonic welding machine using the head assembly. Background Art

[0002] The stroke adjustment of the upper mold of the existing high-power ultrasonic welding machine is very rough and has poor stability, and the value cannot be adjusted visually. Fine-tuning relies on the collision between the oscillator tube and the fine-tuning structure to stop the action. The force of the large cylinder is very large. If it collides with the fine-tuning component without deceleration, 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 in low-power plastic welding machines. Because the downward pressure of high-power plastic welding machines is very large, the previous fine-tuning structures will be damaged if used in high-power ultrasonic plastic welding machines, affecting the welding accuracy. Therefore, the precision fine-tuning of general plastic welding machines is not applicable to the structure of high-power ultrasonic plastic welding machines, and new precision fine-tuning structures need to be developed. Summary of the invention

[0003] The first object of the present invention is to provide a head assembly of an ultrasonic welding machine with improved stroke adjustment accuracy.

[0004] A second object of the present invention is to provide an ultrasonic welding machine with improved stroke adjustment accuracy.

[0005] 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 vibration tube, a vibration tube driving device and a stroke fine-adjustment assembly, the vibration tube driving device is electrically connected to the main control circuit, the vibration tube, the vibration tube driving device and the stroke fine-adjustment assembly are all installed on the lifting bracket, the vibration tube driving device drives the vibration tube to move in a vertical direction on the lifting bracket, and the stroke fine-adjustment assembly limits the stroke of the vibration tube; the stroke fine-adjustment assembly includes a fine-adjustment seat, a fine-adjustment block, a fine-adjustment rod and a fine-adjustment pad, the fine-adjustment seat is installed on the vibration tube, the fine-adjustment block is adjustably connected to the fine-adjustment seat through the fine-adjustment rod, the fine-adjustment pad is installed on the lifting bracket, the fine-adjustment block is provided with a limiting portion, and the limiting portion is coordinated with the fine-adjustment pad.

[0006] It can be seen from the above scheme that the head assembly of the ultrasonic welding machine of the present invention can fine-tune the stroke of the oscillating cylinder by setting a stroke fine-tuning assembly, improve the stroke adjustment accuracy, ensure the distance between the oscillating cylinder and the workpiece to be welded, and avoid overpressure. At the same time, the fine-tuning pad is set to avoid the fine-tuning block and the lifting bracket from colliding too violently due to excessive speed during the downward pressure of the oscillating cylinder, resulting in damage to the stroke fine-tuning assembly and affecting the welding accuracy.

[0007] In a further solution, the head assembly also includes a head shell, which is installed on the lifting bracket; the head shell is provided with a scale slot, and the fine-tuning block is provided with a fine-tuning pointer, and the fine-tuning pointer is matched with the scale slot.

[0008] It can be seen that by setting the fine-tuning pointer to cooperate with the scale through slot, when adjusting the fine-tuning component, the fine-tuning distance can be more intuitively visualized, which is convenient for user operation.

[0009] In a further solution, the fine-tuning seat is provided with a limiting groove, and the fine-tuning stopper is slidably arranged in the limiting groove.

[0010] It can be seen that by setting the limit groove and making the fine-tuning block slide in the limit groove, the fine-tuning block can be prevented 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 when pressed down.

[0011] In a further solution, the fine-tuning stopper is arranged to fit the bottom wall of the limiting groove.

[0012] It can be seen that the fine-tuning stopper is arranged in close contact with the bottom wall of the limiting groove, which can avoid the problem of the fine-tuning stopper tilting up after the limiting part and the fine-tuning pad are in contact, thereby reducing the stroke accuracy.

[0013] In a further scheme, 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 stop block, the fine-tuning sleeve is sleeved on the fine-tuning screw, and the fine-tuning screw is installed on the fine-tuning seat through the fine-tuning sleeve.

[0014] It can be seen that the fine-tuning rod includes a fine-tuning knob, a fine-tuning screw and a fine-tuning sleeve. By rotating and adjusting the fine-tuning knob, the adjustment accuracy can be easily controlled.

[0015] In a further solution, the outer peripheral wall of the fine-tuning knob is provided with scales.

[0016] It can be seen that the outer wall of the fine-tuning knob is provided with scales to facilitate visual fine-tuning of the distance.

[0017] 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 portion, which is arranged in coordination with the travel switch.

[0018] It can be seen from this that by setting the travel switch to cooperate with the switch contact part of the fine-tuning block, the distance moved by the fine-tuning block can be detected. After the travel switch is started, the vibration tube drive device can be decelerated through the main control circuit to avoid the fine-tuning block from contacting the lifting bracket at too fast a speed.

[0019] In a further solution, the switch contact portion includes an impact slope and a maintaining plane, and the maintaining plane and the impact slope are distributed in sequence from the top of the fine-tuning stopper downward.

[0020] It can be seen that the switch contact portion is provided with an impact slope, which can provide a buffer when the travel switch contacts the switch contact portion, thereby avoiding damage to the travel switch. The travel switch can be kept in a working state by providing a maintenance plane.

[0021] In a further solution, the head assembly also includes a speed limiting spring, a first end of the speed limiting spring is connected to the lifting bracket, a second end of the speed limiting spring is connected to the vibration tube, and the expansion and contraction direction of the speed limiting spring is the same as the movement direction of the vibration tube.

[0022] It can be seen that by setting a speed limiting spring to connect the lifting bracket and the vibration tube, it can play a role in deceleration when the vibration tube is pressed down, avoiding the fine-tuning block from contacting the lifting bracket at too fast a speed. At the same time, it can also prevent the vibration tube drive device from freely falling and damaging the product when it loses power.

[0023] In order to achieve the second purpose of the present invention, the ultrasonic welding machine provided by the present invention is provided with a head assembly, and the head assembly applies the above-mentioned head assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of an ultrasonic welding machine embodiment of the present invention.

[0025] Figure 2 It is a structural diagram of the head assembly installed on the column in the embodiment of the ultrasonic welding machine of the present invention.

[0026] Figure 3 It is a structural exploded view of the head assembly hiding the head shell in the embodiment of the ultrasonic welding machine of the present invention.

[0027] Figure 4 It 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.

[0028] Figure 5 It is a structural exploded view of the stroke fine adjustment component in the embodiment of the ultrasonic welding machine of the present invention.

[0029] Figure 6 It is a structural exploded view of the fine-tuning rod in the embodiment of the ultrasonic welding machine of the present invention.

[0030] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0031] like Figure 1As shown, in this embodiment, the ultrasonic welding machine includes a head assembly 1, a column 2 and a base 3, the column 2 is vertically mounted on the base 3, and the head assembly 1 is movably mounted on the column 2 along the vertical direction.

[0032] See also Figure 2 The 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 stroke fine-tuning assembly 14 and a stroke switch 15. The lifting bracket 11 is mounted on the column 2. The vibrating cylinder driving device 13 is electrically connected to the main control circuit. The vibrating cylinder 12, the vibrating cylinder driving device 13, the stroke fine-tuning assembly 14 and the stroke switch 15 are all mounted on the lifting bracket 11. The vibrating cylinder driving device 13 drives the vibrating cylinder 12 to move in the vertical direction on the lifting bracket 11, and the stroke fine-tuning assembly 14 limits the stroke of the vibrating cylinder 12. The vibrating cylinder 12 is used to install and fix the transducer assembly 124. The vibrating cylinder driving device 13 can use a motor or a cylinder. In this embodiment, the vibrating cylinder driving device 13 is a cylinder.

[0033] See also Figure 3 and Figure 4 , the vibration tube driving device 13 is detachably mounted on the top platform 111 of the lifting bracket 11, and the top platform 111 is provided with a driving rod through hole 112, and the driving rod 131 of the vibration tube driving device 13 passes through the driving rod through hole 112 and is connected to the vibration tube 12. The vibration tube 12 is mounted on the lifting bracket 11 through a 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 to the lifting bracket 11, the second end of the speed limiting spring 16 is connected to the vibration tube 12, and the extension direction of the speed limiting spring 16 is the same as the movement direction of the vibration tube 12. In this embodiment, the speed limiting spring 16 is mounted on the lifting bracket 11 through a fixing column 17, and the speed limiting spring 16 is mounted on the vibration tube 12 through a stud 18. The top platform 111 is provided with a fixing column mounting hole 113, and the fixing column 17 is mounted in the fixing column mounting hole 113. The speed limiting spring 16 is located in the transducer cavity 123 of the vibration tube 12. The number of the speed limiting springs 16 is two.

[0034] Depend on Figure 3 It can be seen 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 oscillating tube 12. The fine-tuning block 142 is adjustably connected to the fine-tuning seat 141 through the fine-tuning rod 143. The fine-tuning pad 144 is installed on the lifting bracket 11. The fine-tuning block 142 is provided with a limiting portion 1422. The limiting portion 1422 is extended from the top of the fine-tuning block 142, and the limiting portion 1422 is matched with the fine-tuning pad 144.

[0035] See also Figure 5 and Figure 6The fine-tuning rod 143 includes a fine-tuning knob 1431, a fine-tuning screw 1432 and a fine-tuning sleeve 1433. The fine-tuning knob 1431 is mounted on the first end of the fine-tuning screw 1432. The second end of the fine-tuning screw 1432 is mounted on the fine-tuning stopper 142. The fine-tuning sleeve 1433 is sleeved on the fine-tuning screw 1432. The fine-tuning screw 1432 is mounted on the fine-tuning seat 141 through the fine-tuning sleeve 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. The fine-tuning rod through hole 1411 is communicated with the fastening screw hole 1412. The fine-tuning sleeve 1433 is installed in the fine-tuning rod through hole 1411. A fastening bolt 145 is installed in the fastening screw hole 1412. The fastening bolt 145 is used to fix the fine-tuning screw 1432. The fine-tuning block 142 is provided with a fine-tuning rod screw hole 1421, and the threaded portion 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 100-equally divided scale. The fine-tuning seat 141 is also provided with a limit groove 1413, and the fine-tuning block 142 is slidably arranged in the limit groove 1413, and the fine-tuning block 142 is arranged to fit the bottom wall of the limit groove 1413. By setting the limit groove 1413, the fine-tuning block 142 is allowed to slide in the limit groove, which can prevent the fine-tuning block 142 from rotating along the fine-tuning rod, so that the limit portion 1422 of the fine-tuning block 142 cannot cooperate with the fine-tuning pad 144 for limiting when pressed down. At the same time, the fine-tuning block 142 is arranged to fit the bottom wall 1414 of the limit groove 1413, which can prevent the fine-tuning block 142 from tilting up after the limit portion 1422 fits the fine-tuning pad 144, thereby reducing the stroke accuracy.

[0036] Depend on Figure 2 and Figure 3 It can be seen that the head assembly 1 also includes a travel switch 15, and the travel switch 15 is electrically connected to the main control circuit. Figure 5 It can be seen that the fine-tuning block 142 is provided with a switch contact portion 1423, and the switch contact portion 1423 is provided in cooperation with the travel switch 15. The switch contact portion 1423 includes an impact slope 1424 and a maintaining plane 1425, and the maintaining plane 1425 and the impact slope 1424 are distributed in sequence from the top of the fine-tuning block 142 downward. By providing the travel switch 15 to cooperate with the switch contact portion 1423 of the fine-tuning block 12, the distance moved by the fine-tuning block 142 can be detected. After the travel switch 15 is activated, the main control circuit can be used to decelerate the oscillating tube drive device 13 to avoid the fine-tuning block 142 from contacting the lifting bracket 11 at too high a speed and damaging the device.

[0037] Depend on Figure 1 It can be seen that the head assembly 1 also includes a head shell 19, which is mounted on the lifting bracket 11 and is provided with a scale slot 191. Figure 5It can be seen that 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 matched with the scale through groove 191 .

[0038] When the ultrasonic welding machine of this embodiment is adjusting the stroke, the lifting bracket 11 is first moved to make the distance between the vibration tube 12 and the workpiece to be welded close to a certain distance, and then the lifting bracket 11 is fixed. Then, the stroke of the vibration tube 12 is adjusted using the stroke fine-tuning component 14. When adjusting the stroke fine-tuning component 14, the 100-equal-division scale on the circumference of the fine-tuning knob 1431 and the height scale of the scale through groove 191 are used to adjust and observe, so that the distance of fine-tuning can be more intuitively visualized and the accuracy can be improved. When the ultrasonic welding machine is working, the vibration tube driving device 13 drives the vibration tube 12 to move. When the vibration tube 12 moves downward, the fine-tuning block 142 moves downward with the vibration tube 12. When the switch contact part 1423 of the fine-tuning block 142 triggers the stroke switch 15, the main control circuit controls the vibration tube driving device 13 to decelerate to avoid the fine-tuning block 142 from contacting the lifting bracket 11 at too fast a speed and damaging the device.

[0039] 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 oscillating tube 12 by setting the stroke fine-tuning assembly 14, improve the stroke adjustment accuracy, ensure the distance between the oscillating tube 12 and the workpiece to be welded, and avoid overpressure. At the same time, the fine-tuning pad 144 is set to prevent the fine-tuning block 142 from colliding too violently with the lifting bracket 11 due to excessive speed during the downward pressing process of the oscillating tube 12, resulting in damage to the stroke fine-tuning assembly 14 and affecting the welding accuracy.

[0040] 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-substantial modifications made to the present invention using this concept also fall within the protection scope of the present invention.

Claims

1. A head assembly of an ultrasonic welding machine, characterized in that: It includes a main control circuit, a lifting bracket, a vibrating tube, a vibrating tube driving device and a stroke fine-adjustment component, wherein the vibrating tube driving device is electrically connected to the main control circuit, the vibrating tube, the vibrating tube driving device and the stroke fine-adjustment component are all installed on the lifting bracket, the vibrating tube driving device drives the vibrating tube to move in a vertical direction on the lifting bracket, and the stroke fine-adjustment component limits the stroke of the vibrating tube; 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 vibrating tube. The fine-tuning block is adjustably connected to the fine-tuning seat through the fine-tuning rod. The fine-tuning pad is installed on the lifting bracket. The fine-tuning block is provided with a limiting portion, which is extended from the top of the fine-tuning block. The limiting portion is arranged in cooperation with the fine-tuning pad.

2. The head assembly of the ultrasonic welding machine according to claim 1, characterized in that: The head assembly also includes a head shell, and the head shell is mounted on the lifting bracket; The machine head shell is provided with a scale through slot, the fine-tuning block is provided with a fine-tuning pointer, and the fine-tuning pointer is matched with the scale through slot.

3. 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 stopper is slidably arranged in the limiting groove.

4. The head assembly of the ultrasonic welding machine according to claim 3, characterized in that: The fine-tuning stopper is arranged in close contact with the bottom wall of the limiting groove.

5. The head assembly of the 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, the second end of the fine-tuning screw is installed on the fine-tuning block, the fine-tuning sleeve is sleeved on the fine-tuning screw, and the fine-tuning screw is installed on the fine-tuning seat through the fine-tuning sleeve.

6. 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.

7. The head assembly of the ultrasonic welding machine according to any one of claims 1 to 4, characterized in that: The head assembly also includes a travel switch, which is electrically connected to the main control circuit; The fine-tuning stopper is provided with a switch contact portion, and the switch contact portion is arranged in cooperation with the travel switch.

8. The head assembly of the ultrasonic welding machine according to claim 7, characterized in that: The switch contact portion comprises an impact slope and a maintaining plane, and the maintaining plane and the impact slope are distributed in sequence from the top of the fine-tuning stopper downward.

9. The head assembly of the ultrasonic welding machine according to any one of claims 1 to 4, characterized in that: The head assembly also includes a speed limiting spring, a first end of which is connected to the lifting bracket, a second end of which is connected to the vibration tube, and a telescopic direction of the speed limiting spring is the same as a movement direction of the vibration tube.

10. An ultrasonic welding machine, provided with a head assembly, characterized in that: The head assembly applies the head assembly described in any one of claims 1 to 9.

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