Ultrasonic welding machine, its horn assembly and working method

Abstract

The application provides a machine head assembly of an ultrasonic welding machine and a working method of the assembly. The machine head assembly comprises a lifting support, an ultrasonic vibration cylinder assembly and an ultrasonic vibration cylinder driving mechanism arranged on the lifting support. The ultrasonic vibration cylinder driving mechanism drives the ultrasonic vibration cylinder assembly to move along a first direction relative to the lifting support. A stopper is arranged on the ultrasonic vibration cylinder assembly, and a limiting part is arranged on the lifting support. The stopper and the limiting part cooperate to limit the displacement of the ultrasonic vibration cylinder assembly relative to the lifting support along the first direction. The machine head assembly further comprises an ultrasonic switch and a trigger part. One of the ultrasonic switch and the trigger part is arranged on the ultrasonic vibration cylinder assembly, and the other is arranged on the lifting support. The trigger part triggers the ultrasonic switch along with the movement of the ultrasonic vibration cylinder assembly relative to the lifting support along the first direction. The trigger part triggers the ultrasonic switch earlier than the time when the stopper contacts the limiting part. The machine head assembly of the application is convenient to debug and can improve the service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ultrasonic welding equipment, in particular to an ultrasonic welding machine, a horn assembly thereof and a working method. BACKGROUND

[0002] The ultrasonic welding machine is an advanced high-tech equipment that converts high-frequency electric energy into mechanical vibration energy through a transducer, and applies the mechanical vibration energy to workpieces to generate high-frequency friction between the surfaces of the workpieces until the surfaces of the workpieces are melted together by heat. The ultrasonic welding machine has the advantages of high working efficiency, simple operation and labor cost saving, and is widely used in the industries of daily necessities, toys, electrical appliances, automobile manufacturing and electronics.

[0003] In the mode adjustment and normal operation of the existing ultrasonic welding machine, the welding head needs to be lowered to approach the workpiece to be welded and the ultrasonic wave is started in advance. A kind of existing ultrasonic welding machine has a scheme of starting ultrasonic wave by using a delay relay before the welding head stops descending. However, when different molds are replaced for production, not only the position of the horn assembly needs to be adjusted, but also the time of descending the vibration cylinder assembly needs to be calculated first, and then the delay relay needs to be adjusted to adjust the trigger time of the ultrasonic wave to be less than the descending time of the vibration cylinder assembly, to meet the production needs of different molds. This not only needs multiple adjustments, but also is prone to adjustment errors. Moreover, when the corresponding parts are damaged, the speed of the vibration cylinder descending is affected, which is prone to the problems of starting the ultrasonic wave in advance when the vibration cylinder does not descend to the corresponding position, or the vibration cylinder descending to the position in advance, resulting in the ultrasonic wave being dead, and the ultrasonic wave cannot be started. SUMMARY

[0004] In order to solve the problems existing in the prior art, the first object of the present application is to provide a horn assembly of an ultrasonic welding machine with good welding effect and rapid adjustment.

[0005] The second object of the present application is to provide an ultrasonic welding machine comprising the horn assembly.

[0006] The third object of the present application is to provide a working method of an ultrasonic welding machine applied to the horn assembly.

[0007] In order to achieve the above-mentioned first object, the ultrasonic welding machine head assembly provided by the application comprises a lifting support, a vibrating cylinder assembly and a vibrating cylinder driving mechanism arranged on the lifting support, the vibrating cylinder driving mechanism drives the vibrating cylinder assembly to move relative to the lifting support along a first direction; a stopper is arranged on the vibrating cylinder assembly, a limiting portion is arranged on the lifting support, the stopper and the limiting portion cooperate to limit the displacement of the vibrating cylinder assembly relative to the lifting support in the first direction, the machine head assembly further comprises an ultrasonic switch and a trigger portion, one of the ultrasonic switch and the trigger portion is arranged on the vibrating cylinder assembly, and the other is arranged on the lifting support, the trigger portion triggers the ultrasonic switch along with the movement of the vibrating cylinder assembly relative to the lifting support in the first direction, and the time at which the trigger portion triggers the ultrasonic switch is earlier than the time at which the stopper contacts the limiting portion.

[0008] As can be seen from the above, the trigger portion is arranged to trigger the ultrasonic switch first, and then the vibrating cylinder assembly stops descending, so that when different molds are replaced for processing, the trigger portion is used to trigger the ultrasonic switch, and only the descending position of the machine head assembly needs to be adjusted to adjust the starting time of the ultrasonic wave, and the adjustment is not easily affected by external factors, thereby greatly improving the efficiency and accuracy of debugging.

[0009] Further, the machine head assembly further comprises a buffer mechanism and a deceleration switch, the deceleration switch and the ultrasonic switch are both arranged on the vibrating cylinder assembly, the trigger portion can trigger the deceleration switch to start the buffer mechanism, and the time at which the trigger portion triggers the deceleration switch is earlier than the time at which the trigger portion triggers the ultrasonic switch along with the movement of the vibrating cylinder assembly relative to the lifting support in the first direction.

[0010] As can be seen from the above, the buffer mechanism can make the vibrating cylinder assembly slowly approach the object to be welded, provide sufficient time for starting the ultrasonic wave, reduce welding deviation, improve welding quality, and prolong the service life of the mold.

[0011] Further, the machine head assembly further comprises a fine stroke assembly, the fine stroke assembly comprises a stopper and a fine rod assembly, the stopper and the limiting portion are arranged opposite to each other in the first direction, and the limiting portion is arranged on the fine rod assembly.

[0012] As can be seen from the above, the stroke fine adjustment assembly can further adjust the displacement of the vibrating cylinder assembly, meet the precise fine adjustment and accurate positioning of the welding head position, and the ultrasonic starting switch is also adjusted along with the adjustment of the stroke fine adjustment assembly, thereby greatly improving the efficiency of debugging.

[0013] Further, the lifting support is provided with a mounting cavity, the lifting support comprises a first mounting cavity side wall and a second mounting cavity side wall which are connected perpendicularly to each other, the first mounting cavity side wall extends along a first direction, the second mounting cavity side wall extends from the first mounting cavity side wall along a second direction away from the vibration cylinder assembly, the vibration cylinder assembly is mounted on a side of the first mounting cavity side wall away from the mounting cavity, a sliding groove extending along the first direction is formed in the first mounting cavity side wall, a stopper is in sliding fit with the sliding groove, a first end of the stopper is arranged on the vibration cylinder assembly, a second end of the stopper passes through the sliding groove along the second direction and extends into the mounting cavity, the second direction intersects the first direction, a fine adjustment rod assembly is mounted on the second mounting cavity side wall, and the fine adjustment rod assembly extends along the first direction.

[0014] As can be seen, by arranging the limiting assembly in the lifting support, the volume of the ultrasonic welding machine is greatly reduced, and the miniaturization requirement of the ultrasonic welding machine is met.

[0015] Further, the ultrasonic switch is a proximity switch.

[0016] As can be seen, the use of the proximity switch can improve the service life of the switch and the anti-interference capability.

[0017] Further, a limiting pad head is arranged at an end of the fine adjustment rod assembly close to the stopper, the trigger part and the limiting part are both located on the limiting pad head, the deceleration switch is a proximity switch, and the deceleration switch and the ultrasonic switch are both arranged on the stopper and opposite to the trigger part along the first direction.

[0018] Further, a positioning column extending along the first direction is arranged at an end of the fine adjustment rod assembly close to the stopper, the trigger part is located on the positioning column, a limiting pad head is arranged at a connection between the fine adjustment rod assembly and the positioning column, the deceleration switch and the ultrasonic switch are both arranged on a side of the stopper away from the limiting pad head and arranged along the first direction, the deceleration switch is arranged close to the stopper relative to the ultrasonic switch, the deceleration switch is a proximity switch, a first sensing hole is arranged on the deceleration switch, a second sensing hole is arranged on the ultrasonic switch, and the positioning column can pass through the first sensing hole and the second sensing hole in sequence to trigger the deceleration switch and the ultrasonic switch in sequence.

[0019] As can be seen, the use of the proximity switch to sense the distance relative to the fine adjustment pad head or the use of the proximity switch to sense the metal positioning column makes the start of the buffer mechanism and the ultrasonic switch not easily affected by the descending speed of the vibration cylinder, and compared with the contact type switch such as the micro switch, there is no wear between the proximity switch and the fine adjustment assembly, and the service life is greatly increased compared with the contact type switch.

[0020] Further, an isolation gasket is arranged between the deceleration switch and the ultrasonic switch.

[0021] From the above, by setting the isolation gasket, the distance between the annular proximity switch and the metal positioning column can be adjusted.

[0022] To achieve the above-mentioned second purpose, the ultrasonic welding machine provided by the application comprises the horn assembly of any one of the above-mentioned ultrasonic welding machines.

[0023] To achieve the above-mentioned third purpose, the working method provided by the application is applied to the horn assembly of the above-mentioned ultrasonic welding machine, and the method comprises the following steps:

[0024] Step 1: the horn assembly is lowered to a first preset position in a first direction;

[0025] Step 2: the vibration cylinder driving mechanism drives the vibration cylinder assembly to move in the first direction to approach the object to be welded;

[0026] Step 3: the vibration cylinder assembly drives the deceleration switch to move relative to the trigger part, the trigger part triggers the deceleration switch, the buffer mechanism is started, and the vibration cylinder assembly starts to move at a reduced speed;

[0027] Step 4: the vibration cylinder assembly continues to move, the vibration cylinder assembly drives the ultrasonic switch to move relative to the trigger part, the trigger part triggers the ultrasonic switch, and the ultrasonic wave is started;

[0028] Step 5: the vibration cylinder assembly continues to move, the vibration cylinder assembly drives the stopper to move to a position where the stopper contacts the limiting part, and the vibration cylinder assembly stops moving.

[0029] As can be seen from the above, the system assembly of the ultrasonic welding machine is provided, the debugging efficiency of the welding machine is greatly improved, the customer is facilitated to use, the ultrasonic wave is prevented from being dead, the welding deviation is reduced, the welding quality and the service life of the ultrasonic welding machine are improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a perspective view of the ultrasonic welding machine of the embodiment of the application.

[0031] Figure 2 It is a schematic view of the internal structure of the ultrasonic welding machine of the embodiment of the application.

[0032] Figure 3 It is an exploded view of the horn assembly, the horn driving mechanism and the stand of the embodiment of the application.

[0033] Figure 4 It is a structural view of the vibration cylinder assembly and the lifting support of the first embodiment of the application.

[0034] Figure 5 It is an exploded view of the vibration cylinder assembly and the lifting support of the first embodiment of the application.

[0035] Figure 6The exploded view of the deceleration switch, ultrasonic switch and stopper of the first embodiment of the present application.

[0036] Figure 7 The top view of the deceleration switch, ultrasonic switch and stopper of the first embodiment of the present application.

[0037] Figure 8 The structural view of the vibration cylinder assembly and lifting support of the second embodiment of the present application.

[0038] Figure 9 The top view of the deceleration switch, ultrasonic switch and stopper of the second embodiment of the present application.

[0039] Figure 10 The sectional view of the lifting support and fine adjustment rod assembly of the first embodiment of the present application.

[0040] Figure 11 The Figure 10 The enlarged view of A in the figure.

[0041] Figure 12 The exploded view of the fine adjustment rod assembly of the first embodiment of the present application.

[0042] Figure 13 The exploded view of the ultrasonic welding machine electrical box support, electrical box and lower computer of the embodiment of the present application.

[0043] Figure 14 The exploded view of the pressing assembly of the embodiment of the present application.

[0044] Figure 15 The sectional view of the pressing assembly of the embodiment of the present application.

[0045] Figure 16 The Figure 15 The enlarged view of B in the figure. DETAILED DESCRIPTION

[0046] The first embodiment of the deceleration switch, ultrasonic switch and ultrasonic welding machine:

[0047] Referring to Figures 1 to 3 , the ultrasonic welding machine of the embodiment comprises a head assembly 4, a base 1 and a head driving mechanism 3, the base 1 is provided with a stand 2, the stand 2 is provided with guide rails 20 extending along the Z direction at intervals on one side wall, the head assembly 4 is provided with a connecting sliding block 64 and a locking device 65 on the side close to the stand 2, the head assembly 4 cannot move when the locking device 65 holds the guide rails 20, the head assembly 4 is connected with the guide rails 20 through the connecting sliding block 64, the head driving mechanism 3 comprises a motor 31 and an adjusting screw 30, the head assembly 4 is connected with the adjusting screw 30 through a screw connecting arm 63, the motor 31 drives the adjusting screw 30 to rotate so that the head assembly 4 moves along the Z direction on the guide rails 20.

[0048] The head assembly 4 comprises a main control circuit (not shown in the figure), a lifting support 6, a buffer mechanism 8, a fine adjustment stroke assembly 9, a vibration cylinder driving mechanism 7 and a vibration cylinder assembly 5 installed on the lifting support 6, wherein the vibration cylinder assembly 5 is installed on the side wall close to one side of the lifting support 6, and a sliding rail 50 is installed on the side wall (shown in the figure), and a sliding block 67 corresponding to the sliding rail 50 is installed on the lifting support 6, and the sliding block 67 is connected with the sliding rail 50. The vibration cylinder driving mechanism 7, the vibration cylinder assembly 5 and the buffer mechanism 8 are electrically connected with the main control circuit, the buffer mechanism 8 is connected with the vibration cylinder driving mechanism 7, and the vibration cylinder driving mechanism 7 drives the vibration cylinder assembly 5 to move along the Z direction relative to the lifting support 6. Figure 5 The head assembly 4 comprises a main control circuit (not shown in the figure), a lifting support 6, a buffer mechanism 8, a fine adjustment stroke assembly 9, a vibration cylinder driving mechanism 7 and a vibration cylinder assembly 5 installed on the lifting support 6, wherein the vibration cylinder assembly 5 is installed on the side wall close to one side of the lifting support 6, and a sliding rail 50 is installed on the side wall (shown in the figure), and a sliding block 67 corresponding to the sliding rail 50 is installed on the lifting support 6, and the sliding block 67 is connected with the sliding rail 50. The vibration cylinder driving mechanism 7, the vibration cylinder assembly 5 and the buffer mechanism 8 are electrically connected with the main control circuit, the buffer mechanism 8 is connected with the vibration cylinder driving mechanism 7, and the vibration cylinder driving mechanism 7 drives the vibration cylinder assembly 5 to move along the Z direction relative to the lifting support 6.

[0049] Referring to Figure 4 The fine adjustment stroke assembly 9 comprises a fine adjustment rod assembly and a stopper 94, the fine adjustment rod assembly comprises a fine adjustment screw rod and a fine adjustment knob assembly, and the lifting support 6 is provided with a mounting cavity 60, the lifting support 60 comprises a first mounting cavity side wall 61 and a second mounting cavity side wall 62 which are connected with each other perpendicularly, the first mounting cavity side wall 61 extends along the Z direction, two sliding grooves 66 extending along the Z direction are formed in the first mounting cavity side wall 61, the second mounting cavity side wall 62 extends along the Y direction from the first mounting cavity side wall 61 to the stand 2, and the vibration cylinder assembly 5 is installed on the side of the first mounting cavity side wall 61 away from the mounting cavity 60.

[0050] The stopper 94 is in sliding fit with the sliding groove 66, the first end of the stopper 94 is installed on the vibration cylinder assembly 5, the second end of the stopper 94 penetrates through the sliding groove along the Y direction and extends into the mounting cavity 60, the fine adjustment screw rod is installed on the second mounting cavity side wall 62, a limiting pad 90 is further arranged on the fine adjustment screw rod, the limiting pad 90 is located in the mounting cavity 90, the fine adjustment knob assembly is arranged on the end of the fine adjustment screw rod away from the mounting cavity 60, the surface of the limiting pad 90 away from the second mounting cavity side wall 62 is a limiting part, the stopper 94 and the limiting part of the limiting pad 90 are arranged opposite to each other along the Z direction, the stopper 94 cooperates with the limiting part of the limiting pad 94 to limit the displacement of the vibration cylinder assembly 5 relative to the lifting support 6 along the Z direction, and the limiting pad 90 is arranged close to the second mounting cavity side wall 62 relative to the stopper 94.

[0051] The stopper 94 is provided with a deceleration switch 942 and an ultrasonic switch 944, and the fine adjustment rod assembly is further provided with a trigger part. The deceleration switch 942 is electrically connected with the buffer mechanism 8, the ultrasonic switch 944 is connected with the main control circuit, and the trigger part triggers the deceleration switch and the ultrasonic switch in sequence to start the buffer mechanism and the ultrasonic wave.

[0052] Alternatively, a stop piece can be arranged on the fine adjustment screw rod, the fine adjustment screw rod is arranged in a limiting seat (not shown in the figure) and a fixing seat (not shown in the figure), the limiting seat is detachably connected with the lifting support, the fixing seat is detachably connected with the vibration cylinder assembly, the fine adjustment screw rod is movable along the Z direction relative to the limiting seat, the fine adjustment screw rod is rotatably connected with the fixing seat, the fine adjustment screw rod and the fixing seat are limited in the Z direction, the rotation of the fine adjustment knob assembly drives the fine adjustment screw rod to rotate, the stop piece is movable along the Z direction relative to the fine adjustment screw rod, and the falling stroke of the vibration cylinder assembly is adjusted. When the stop piece abuts against the upper surface of the limiting seat, the vibration cylinder driving mechanism 7 stops working.

[0053] Referring to Figures 4 to 7 and in combination Figure 10 , the first end of the fine adjustment screw rod is provided with a positioning column 91 extending along the Z direction, the trigger part is located at the upper end of the positioning column 91, the fine adjustment knob assembly is arranged at the second end of the fine adjustment screw rod, the positioning column 91 is made of metal, the positioning column 91 is integrally formed with the fine adjustment screw rod, the limiting pad head 90 is located between the positioning column 91 and the fine adjustment knob assembly, and the limiting pad head 90 is sleeved outside the positioning column 91 and detachably fixed with the fine adjustment screw rod in a threaded connection manner.

[0054] The side of the stop piece 94 away from the limiting pad head 90 is provided with a mounting bracket 941, the deceleration switch 942 and the ultrasonic switch 944 are arranged on the side of the mounting bracket 941 away from the stop piece 94 along the Z direction, the deceleration switch 942 and the ultrasonic switch 944 are arranged with a separation pad 943 therebetween, the deceleration switch 942 and the ultrasonic switch 944 are both proximity switches, and the deceleration switch 942 is closer to the stop piece 94 than the ultrasonic switch 944.

[0055] The stop piece 94 is provided with a first limiting hole 940, the mounting bracket 941 is provided with a second limiting hole 9410, the separation pad 943 is provided with a third limiting hole 9430, the deceleration switch 942 is provided with a first sensing hole 9420, and the ultrasonic switch 944 is provided with a second sensing hole 9440. The first sensing hole 9420, the second sensing hole 9440, the first limiting hole 940, the second limiting hole 9410, the third limiting hole 9430 and the positioning column 91 are coaxially arranged, the diameter of the first limiting hole 940 is smaller than the diameter of the limiting pad head 90, so that the stop piece 94 can abut against the limiting pad head 90. When the vibration cylinder driving mechanism 7 drives the vibration cylinder assembly 5 to fall along the Z direction, the first sensing hole 9420, the second sensing hole 9440 and the three limiting holes are movable along the Z direction, so that the positioning column 91 passes through the first sensing hole 9420, the second sensing hole 9440 and the three limiting holes in sequence.

[0056] The working method of the embodiment includes the following steps:

[0057] First step: the head driving mechanism drives the 3-drive head assembly 4 to descend along the Z direction to the first preset position.

[0058] Second step: the vibration cylinder driving mechanism 7 drives the vibration cylinder assembly 5 to move along the Z direction to approach the object to be welded (not shown in the figure).

[0059] Third step: when the trigger part on the positioning column 91 passes through the first sensing hole 9420, the buffer mechanism 8 controls the cylinder exhaust reversal of the vibration cylinder driving mechanism 7, so that the vibration cylinder assembly 5 slows down to approach the object to be welded.

[0060] Fourth step: the vibration cylinder assembly 5 continues to move, and when the trigger part on the positioning column 91 passes through the second sensing hole 9440, the ultrasonic wave is started.

[0061] Fifth step: the vibration cylinder assembly 5 continues to move, and when the stopper 94 abuts against the limiting pad 90, the vibration cylinder driving mechanism 7 stops working.

[0062] Sixth step: the welding is completed, and the vibration cylinder assembly 5 returns to the first preset position.

[0063] When a large number of the same products are welded, the above-mentioned second step to the sixth step can be repeated to realize automatic production and improve production efficiency.

[0064] Deceleration switch, ultrasonic switch and second embodiment of ultrasonic welding machine:

[0065] Referring to Figure 8 and Figure 9 In this embodiment, the deceleration switch 942 and the ultrasonic switch 944 are both proximity switches, the trigger part is the surface of the limiting pad 90 opposite to the side of the stopper, the deceleration switch 942 and the ultrasonic switch 944 are arranged in sequence along the X direction, the deceleration switch 942 and the ultrasonic switch 944 are both provided in the stopper 94, and the deceleration switch 942 and the ultrasonic switch 944 are both arranged opposite to the trigger part on the limiting pad 90 in the Z direction. The ultrasonic switch 944 and the deceleration switch 942 have an ultrasonic sensing distance and a deceleration sensing distance respectively.

[0066] The working method of this embodiment includes the following steps:

[0067] First step: the head driving mechanism drives the 3-drive head assembly 4 to descend along the Z direction to the first preset position.

[0068] Second step: the vibration cylinder driving mechanism 7 drives the vibration cylinder assembly 5 to move along the Z direction to approach the object to be welded (not shown in the figure).

[0069] Third step: When the distance between the deceleration switch 942 and the upper trigger part of the limiting pad head 90 meets the deceleration sensing distance, the buffer mechanism 8 controls the cylinder exhaust reversing of the vibration cylinder driving mechanism 7, so that the vibration cylinder assembly 5 slows down and drops.

[0070] Fourth step: The vibration cylinder assembly 5 continues to move, and when the distance between the ultrasonic switch 944 and the limiting pad head 90 meets the ultrasonic sensing distance, the ultrasonic wave is started.

[0071] Fifth step: The vibration cylinder assembly 5 continues to move, and when the stop piece 94 abuts against the limiting pad head 90, the vibration cylinder driving mechanism 7 stops working.

[0072] Sixth step: The welding is completed, and the vibration cylinder assembly 5 returns to the first preset position.

[0073] When a large number of the same products are welded, the above-mentioned second step to the sixth step can be repeated to realize automatic production and improve production efficiency.

[0074] Alternatively, the deceleration switch 942 and the ultrasonic switch 944 can be existing switches such as micro switches.

[0075] Referring to Figures 10 to 12 In the embodiment, the second mounting cavity side wall 62 is provided with a connecting hole 620 extending in the Z direction, and a fine adjustment mounting seat 95 is detachably mounted in the connecting hole 620. The fine adjustment mounting seat 95 is centrally formed with a threaded hole 950. The fine adjustment screw rod includes a screw rod part 96 and a sliding rod part 97 connected in the axial direction of the fine adjustment screw rod. The limiting pad head 90 is arranged at one end of the screw rod part 96 away from the sliding rod part 97, and the screw rod part 96 is threadedly connected with the threaded hole 950.

[0076] The fine adjustment knob assembly includes a fine adjustment knob 93 and a locking part 92. The fine adjustment knob 93 is arranged at one end of the sliding rod part 97 away from the screw rod part 96, and the fine adjustment knob 93 is detachably fixedly connected with the sliding rod part 97. The locking part 92 is sleeved on the screw rod part 96 and threadedly connected with the screw rod part 96. The locking part 92 is movable relative to the fine adjustment knob 93 along the axial direction of the fine adjustment screw rod.

[0077] The locking part 92 includes a locking sleeve 920 and a locking knob 921 connected in the axial direction. The fine adjustment knob 93 is formed with a mounting cavity 932. The locking sleeve 920 is arranged in the mounting cavity. The locking knob is located outside the mounting cavity 932 and between the fine adjustment knob 93 and the second mounting cavity side wall 62 in the axial direction. The outer peripheral wall of the locking sleeve 920 is provided with first scale lines 922 arranged in the axial direction. The locking knob 93 is movable relative to the second mounting cavity side wall 62 in the Z direction to abut against the lower surface of the second mounting cavity side wall 62.

[0078] The fine adjustment mounting base 95 comprises a first mounting portion 952 and a second mounting portion 953 connected along the axial direction of the fine adjustment screw rod, the first mounting portion 952 abuts against the surface of the second mounting cavity side wall 62 away from the fine adjustment knob assembly, and the second mounting portion 953 is arranged in the connecting hole 620, the first mounting portion 952 is provided with two first mounting holes 951, and the second mounting cavity side wall 62 is provided with two second mounting holes (not shown in the figure) corresponding to the first mounting holes 951, and the fine adjustment mounting base 95 is fixedly mounted on the second mounting cavity side wall by using fasteners penetrating through the first mounting holes 951 and the second mounting holes. By arranging the fine adjustment mounting base, it is convenient to connect holes of various diameters.

[0079] The fine adjustment knob 93 is provided with an inclined platform portion 930 extending along the circumferential direction of the fine adjustment knob near one side of the fine adjustment knob 93, and the outer diameter of the inclined platform portion 930 gradually increases in the axial direction of the fine adjustment screw rod from the end of the fine adjustment knob 93 to the direction away from the second mounting cavity side wall 62, and the outer surface of the inclined platform portion 930 is provided with second scale lines 931 arranged along the circumferential direction of the fine adjustment knob 93.

[0080] Alternatively, the connecting hole 620 is a threaded hole, and the screw rod portion 96 is directly screwed with the connecting hole 620.

[0081] The locking component 92 is provided with a countersunk hole 98 near the upper surface of the second mounting cavity side wall 62, the countersunk hole 98 is arranged opposite to the fine adjustment mounting base 95 in the axial direction of the locking component 92, and the diameter of the countersunk hole 98 is greater than the outer diameter of the fine adjustment mounting base 95.

[0082] The embodiment also provides a method for using the fine adjustment stroke assembly, which comprises the following steps:

[0083] First step: forward rotation of the fine adjustment knob 93 to move the fine adjustment stroke mechanism in the Z direction by a first stroke, and the first stroke is greater than the design stroke (the design stroke is the stroke required for the vibration cylinder assembly to be lowered according to different mold requirements).

[0084] Second step: calculation of a second stroke required for the locking component 92 to be moved according to the first scale 922 on the locking sleeve 920 and the second scale 931 on the fine adjustment knob 93, and reverse rotation of the locking knob 921 to move the second stroke.

[0085] Third step: reverse rotation of the fine adjustment knob 93 to make the locking knob 921 abut against the surface of the mounting cavity side wall 6 near the locking knob 921.

[0086] Reference is made to Figures 13 to 16In the embodiment, the side wall of the ultrasonic welding machine stand 2 is provided with an electric box support 11, the electric box support 11 comprises a first support plate 110 and a second support plate 111 which are perpendicular to each other, and the first support plate 110 is detachably mounted on the side wall of the stand 2. Optionally, the existing fixing mode can be used to fix the stand. The top of the second support plate 111 is provided with a first limiting plate 112 and a second limiting plate 113 which are parallel and symmetric to each other and are away from the stand 2, a mounting groove 114 extending along the Y direction is formed between the first limiting plate 112 and the second limiting plate 113, the electric box 10 is arranged in the mounting groove 114, two pressing assemblies 13 are mounted on the first limiting plate 112, the pressing assemblies 13 are threadedly connected with the first limiting plate 112, the pressing assemblies 13 can move along the X direction to abut against the side wall of the electric box 11 by rotating the pressing assemblies 13, and the pressing assemblies 13 and the second limiting plate 113 cooperate to clamp the electric box 11.

[0087] A plurality of mounting holes 115 are arranged on the second support plate 111, and a lower computer 12 is further arranged on the electric box support 10, and the lower computer 12 is detachably mounted on the bottom of the second support plate 111 by cooperating with the fasteners and the plurality of mounting holes 115.

[0088] A third support plate 116 is arranged near the connection between the first support plate 110 and the second support plate 111, the opposite two side walls of the third support plate 116 are connected with the first support plate 110 and the second support plate 111 respectively, the first support plate 110, the second support plate 111 and the third support plate 116 are integrally formed, a cavity 117 is formed between the first support plate 110, the second support plate 111 and the third support plate 116, and the cross section of the cavity 117 is triangular. The integral forming of the three plates can effectively improve the structural strength.

[0089] Optionally, the third support plate is a triangular plate, a plurality of third support plates are connected between the first support plate 110 and the second support plate 111, two right angle edges of the third support plate are connected with the first support plate 110 and the second support plate 111 respectively, and the first support plate 110, the second support plate 111 and the third support plate are detachably connected.

[0090] A first damping rubber pad 119 is arranged between the second support plate 111 and the electric box 10, the electric box is spaced apart from the second support plate 111 by the first damping rubber pad 119, a second damping rubber pad 118 is arranged on the side wall in contact with the second limiting plate 113 and the electric box 10, and the electric box 10 is spaced apart from the second limiting plate 113 by the second damping rubber pad 118. The damping rubber pads arranged can not only increase the friction between the electric box 10 and the support 11 to prevent the electric box 10 from moving, but also can reduce the influence of the machine body vibration on the electric box.

[0091] The pressing assembly comprises a pressing knob 130, a screw rod 131 and a pressing disc 132. The screw rod 131 is arranged in the first limiting plate 112 and is threadedly connected with the first limiting plate 112. The pressing knob 130 is arranged at the first end of the screw rod 131. The pressing disc 132 is arranged at the second end of the screw rod 131 and is arranged in the mounting groove 114. The side of the pressing disc 132 away from the screw rod 131 is recessed to form a cavity 140. The pressing rubber block 133 is arranged in the cavity 140. The pressing rubber block 133 comprises a mounting portion 1331 and a pressing portion 1330. The mounting portion 1331 is arranged in the cavity 140 and has the same shape as the cavity 140. The pressing portion 1330 protrudes away from the screw rod 131 along the axial direction of the screw rod 131. The outer diameter of the pressing portion 1330 is equal to the outer diameter of the end wall of the pressing disc 132 away from the pressing knob 130.

[0092] The inner peripheral wall of the cavity 140 is provided with an emptying groove 139. The emptying groove 139 is recessed from the inner peripheral wall of the pressing disc 132 along the radial direction of the pressing disc 132. The emptying groove 139 extends along the circumferential direction of the pressing disc 132. Along the axial direction of the pressing disc 132, the cross-sectional area of the cavity 140 gradually increases from the side of the pressing disc 132 close to the pressing knob 130 to the end of the pressing disc 132 away from the pressing knob 130.

[0093] The pressing disc 132 can rotate along the circumferential direction of the screw rod 131. The second end of the screw rod 131 is fixedly provided with a sliding rod 135 extending along the axial direction of the screw rod 131. The diameter of the sliding rod 135 is smaller than the diameter of the screw rod 131. The bottom wall of the cavity 140 is provided with a first through hole 137 extending along the axial direction of the screw rod 131. The pressing disc 132 is sleeved on the sliding rod 135 through the first through hole 137 and can rotate around the central axis of the sliding rod 135. The end wall of the side of the sliding rod 135 close to the cavity 140 is centrally provided with a threaded hole 1350 coaxial with the screw rod 131. A bolt 134 is arranged in the threaded hole 1350. The bolt head of the bolt 134 is located in the cavity 140. The diameter of the bolt head is greater than the diameter of the first through hole 137. The cooperation between the bolt head and the screw rod 131 limits the axial direction of the pressing disc 132 on the sliding rod 135. Alternatively, a bearing can be arranged in the first through hole to mount the sliding rod 135 to the bearing.

[0094] In the present scheme, the bottom wall of the cavity 140 is further provided with a boss 136 protruding away from the screw rod 131 along the axial direction of the screw rod 131. The first through hole 137 penetrates the boss 136. The diameter of the bolt head is smaller than the outer diameter of the boss 136. The pressing rubber block 133 is provided with a second through hole 138. The boss 136 extends into the second through hole 138 and is interference-fitted with the second through hole 138.

[0095] It should be noted that the above only the preferred embodiments of the present application, but the inventive concept does not limit the design of this, as long as the use of this concept of the present application made non-substantial modifications, also fall within the scope of the present application.

Claims

1. An ultrasonic welding machine head assembly, the machine head assembly comprising a lifting support, and a vibrating horn assembly and a vibrating horn driving mechanism arranged on the lifting support; the vibrating horn driving mechanism drives the vibrating horn assembly to move relative to the lifting support along a first direction; a stopper is arranged on the vibrating horn assembly, and a limiting portion is arranged on the lifting support, the stopper and the limiting portion cooperate to limit displacement of the vibrating horn assembly relative to the lifting support in the first direction; characterized in that: the machine head assembly further comprises an ultrasonic switch and a trigger portion, one of the ultrasonic switch and the trigger portion is arranged on the vibrating horn assembly, and the other is arranged on the lifting support; the trigger portion triggers the ultrasonic switch along with movement of the vibrating horn assembly relative to the lifting support in the first direction, the trigger portion triggers the ultrasonic switch earlier than the time when the stopper contacts the limiting portion; the machine head assembly further comprises a buffer mechanism and a deceleration switch, the deceleration switch and the ultrasonic switch are both arranged on the vibrating horn assembly, and the trigger portion can trigger the deceleration switch to start the buffer mechanism; the trigger portion triggers the deceleration switch earlier than the time when the trigger portion triggers the ultrasonic switch along with movement of the vibrating horn assembly relative to the lifting support in the first direction; the machine head assembly further comprises a fine adjustment stroke assembly, the fine adjustment stroke assembly comprises the stopper and a fine adjustment rod assembly, the stopper and the limiting portion are arranged opposite to each other in the first direction, and the deceleration switch and the ultrasonic switch are both arranged on the stopper; an end of the fine adjustment rod assembly close to the stopper is provided with a limiting pad head, and the trigger portion and the limiting portion are both located on the limiting pad head; the lifting support is provided with a mounting cavity, the lifting support comprises a first mounting cavity side wall and a second mounting cavity side wall connected to each other perpendicularly, the first mounting cavity side wall extends along the first direction, the second mounting cavity side wall extends from the first mounting cavity side wall in a second direction away from the vibrating horn assembly, the vibrating horn assembly is mounted on a side of the first mounting cavity side wall away from the mounting cavity, a sliding groove extending along the first direction is formed in the first mounting cavity side wall, the stopper and the sliding groove slide with each other, a first end of the stopper is arranged on the vibrating horn assembly, a second end of the stopper passes through the sliding groove in the second direction and extends into the mounting cavity, and the second direction intersects the first direction; the fine adjustment rod assembly is mounted on the second mounting cavity side wall, and the fine adjustment rod assembly extends along the first direction.

2. The ultrasonic welding machine head assembly according to claim 1, characterized in that: the ultrasonic switch is a proximity switch.

3. The ultrasonic welding machine head assembly according to claim 2, characterized in that: the deceleration switch is a proximity switch, the deceleration switch and the ultrasonic switch are both opposite to the trigger portion along the first direction, and the deceleration switch is electrically connected with the buffer mechanism.

4. The horn assembly of the ultrasonic welding machine according to claim 2, characterized in that: one end of the fine adjustment rod assembly close to the stopper is provided with a positioning column extending in the first direction, the trigger part is located on the positioning column, the limiting pad head is arranged at the connection between the fine adjustment rod assembly and the positioning column, the deceleration switch and the ultrasonic switch are arranged on the side of the stopper away from the limiting pad head and in the first direction, and the deceleration switch is arranged close to the stopper relative to the ultrasonic switch; the deceleration switch is a proximity switch, the deceleration switch is provided with a first sensing hole, the ultrasonic switch is provided with a second sensing hole, and the positioning column can pass through the first sensing hole and the second sensing hole in sequence to trigger the deceleration switch and the ultrasonic switch in sequence.

5. The horn assembly of the ultrasonic welding machine according to claim 4, characterized in that: an isolation gasket is arranged between the deceleration switch and the ultrasonic switch.

6. An ultrasonic welding machine characterized by: The horn assembly of the ultrasonic welding machine according to any one of claims 1 to 5 further comprises a machine base and a horn driving mechanism, the machine base is provided with a stand column, the stand column is provided with a guide rail and a connecting sliding block, and the horn assembly is connected with the guide rail through the connecting sliding block.

7. A method of working, characterised in that, The method applied to the horn assembly of the ultrasonic welding machine according to any one of claims 1 to 5 comprises the following steps: Step 1: the horn assembly is lowered to a first preset position in the first direction; Step 2: the vibration cylinder driving mechanism drives the vibration cylinder assembly to move in the first direction to approach the object to be welded; Step 3: the vibration cylinder assembly drives the deceleration switch to move relative to the trigger part, the trigger part triggers the deceleration switch, the buffer mechanism is started, and the vibration cylinder assembly starts to move at a reduced speed; Step 4: the vibration cylinder assembly continues to move, the vibration cylinder assembly drives the ultrasonic switch to move relative to the trigger part, the trigger part triggers the ultrasonic switch, and the ultrasonic wave is started; Step 5: the vibration cylinder assembly continues to move, the vibration cylinder assembly drives the stopper to move to the position where the stopper contacts the limiting part, and the vibration cylinder assembly stops moving.

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