CN209008003U - Trigger pressure regulating mechanism and ultrasonic welding machine - Google Patents
Trigger pressure regulating mechanism and ultrasonic welding machine Download PDFInfo
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- CN209008003U CN209008003U CN201821471848.2U CN201821471848U CN209008003U CN 209008003 U CN209008003 U CN 209008003U CN 201821471848 U CN201821471848 U CN 201821471848U CN 209008003 U CN209008003 U CN 209008003U
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- 230000007246 mechanism Effects 0.000 title claims abstract description 133
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Abstract
The utility model provides a kind of triggering pressure regulating mechanism, triggering pressure regulating method and equipment, wherein the triggering pressure regulating mechanism includes: pedestal；First elastic body, setting is on the base；Second elastic body, setting is on the base；Regulating part, when ultrasonic welding machine input is first pressure trigger range, control the first elastic body work, the triggering pressure value of corresponding first range of output first pressure trigger range；It when input is second pressure trigger range, controls the first elastic body and the second elastic body works at the same time, the triggering pressure value of corresponding second range of output second pressure trigger range, second pressure trigger range value is greater than first pressure trigger range value.By the utility model, solve the problems, such as to have achieved the effect that improve welding quality since triggering pressure transient causes welding quality poor and triggering pressure limit is too small in the related technology.
Description
Technical Field
The utility model relates to an ultrasonic bonding field particularly, relates to a trigger pressure adjustment mechanism and ultrasonic bonding machine.
Background
According to the process requirements of ultrasonic welding of plastic workpieces, a certain pressure, i.e. a triggering pressure, is usually applied to the workpiece in advance before the ultrasonic welding machine triggers the ultrasonic waves. In order to meet different welding process requirements, the ultrasonic welding machine needs to accurately control the trigger pressure. The control principle of the welding machine is as follows: the cylinder (or servo system) drives the transducer, the welding head and the corresponding pressure trigger mechanism to move towards the plastic welding workpiece until the transducer, the welding head and the corresponding pressure trigger mechanism contact the surface of the welding workpiece and gradually apply pressure; when the contact pressure reaches a set trigger pressure value, the ultrasonic generator controls the transducer to emit ultrasonic waves, and the welding head obtains the amplitude and welds the welding workpiece.
When the set trigger pressure is inconsistent with the actual pressure, if the actual pressure is smaller than the set trigger pressure, the transducer emits ultrasonic waves in advance, and poor welding of the plastic welding workpiece occurs; if the actual pressure is higher than the set triggering pressure, the transducer emits ultrasonic waves later than the pressure required by the process, so that the welding pressure is too high, and the plastic welding workpiece is damaged.
The quality of an ultrasonic plastic welding machine for welding plastic workpieces is related to the following factors: ultrasonic frequency, output amplitude, applied pressure and weld time. Ultrasonic welders have a variety of ultrasonic triggering modes such as time, pressure, location, etc. For the most common pressure activated mode, the horn is pressed down onto the surface of the welded workpiece, gradually applying pressure to the welded workpiece, and the transducer emits ultrasound when the pressure reaches a certain value.
Aiming at different plastic welding workpieces, such as materials and thicknesses, corresponding ultrasonic welding processes need to be formulated, and meanwhile, corresponding ultrasonic trigger pressure needs to be set.
In the related technology, the motion mechanism of the general ultrasonic plastic welding machine is mainly controlled by a cylinder or a servo system, and the pressure trigger mechanism mainly comprises:
(1) mechanical pressure-triggered control mode: the compression spring module is matched with the involute spiral disc and the photoelectric switch to form a pressure trigger control system;
(2) and S-shaped pressure sensor control mode.
The mechanical pressure trigger structure is shown in fig. 1 and 2:
the photoelectric switch 102 is arranged on the spring base 101, and a plurality of compression springs 103 are symmetrically distributed and arranged in grooves of the spring base 101; an involute spiral disk 107 is fixed on the spring L-shaped pressure plate 104 through a knob 106 and a locking retainer ring 105; the coupling shaft 108 is connected with the spring L-shaped pressing plate 104 through bolts, and the top threaded hole is connected with a driving component cylinder or a servo system of the ultrasonic plastic welding machine.
The knob 106 is rotated to rotate the involute spiral disk 107, and the corresponding trigger pressure is selected according to the scale on the spiral disk. When the involute spiral disk 107 is rotated to a required trigger pressure, the relative positional relationship between the involute spiral disk 107 and the photoelectric switch 102 is set.
When the coupling shaft 108 is pressed by the power source and moves downwards, the spring L-shaped pressing plate 104 is pushed, and then the compression springs 103 are pushed; meanwhile, a certain displacement movement is generated between the involute spiral disk and the photoelectric switch to control the light passing and shading of the photoelectric switch.
The logic control method of the pressure trigger mechanism is shown in fig. 3:
in step S302, the coupling shaft 108 applies pressure to the spring module set of the compression pressure trigger mechanism by the air cylinder or the servo drive system under the control of the power source.
And step S304, the spring module is pressed down for a certain distance to drive the involute spiral disk to move in the photoelectric switch, so that an LED signal in the photoelectric switch is shielded.
In step S306, the photoelectric on-off converter converts the light off signal of the photoelectric switch into an electric control signal.
And step S308, controlling an ultrasonic generator to emit ultrasonic waves.
As described above, the pressure trigger mechanism in the related art mainly utilizes the compression deformation amount of the compression springs to make the spiral disk generate a displacement in the photoelectric switch, so as to control the on/off of the optical signal of the photoelectric switch.
Through the rotatory spiral disk 107 that gradually bursts at the seams, the adjustment is gradually burst at the seams the position of spiral disk in photoelectric switch 102, when cylinder or servo drive pushed down, the bonding tool contacts plastics welding work piece, many compression springs 103 begin the slow compression and drive the spiral disk 107 that gradually bursts at the seams and move down, in case the spiral disk that gradually bursts at the seams covers photoelectric switch 102's light signal, photoelectric switch judges that many compression springs's compressive force has reached the trigger pressure of settlement, thereby give an electrical signal of supersonic generator, the transducer sends the supersound, transmit the bonding tool and carry out the welding of plastics work piece.
The mechanical pressure trigger adjustment mechanism sets the trigger pressure by setting the position of the involute spiral disk 107 in the photoelectric switch 103. The initial positioning of the involute spiral disk and the photoelectric switch is not accurate enough, and meanwhile, if the manufacturing quality of the involute spiral disk is not accurate, the accuracy of the set trigger pressure can be directly influenced.
Meanwhile, in the mechanical pressure trigger mechanism, pressure is fed back by a plurality of compression springs 103, and the minimum trigger pressure needs to be set to be higher than a certain pressure value. Aiming at the welding process requirements of different plastic welding workpieces, if the trigger pressure of the welding workpiece needs to be set at a small pressure value, the existing pressure trigger mechanism is difficult to realize, a part of compression spring needs to be manually disassembled, and the compression force of the spring is reduced.
Aiming at the problems of poor welding quality and small triggering pressure range caused by unstable pressure triggering in a mechanical pressure triggering control mode in the related art, no effective solution is provided at present.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems, an embodiment of the present invention provides a trigger pressure adjusting mechanism and an ultrasonic welding machine.
In one aspect, a trigger pressure adjustment mechanism is provided in an ultrasonic welding machine, comprising: a base;
the first elastic mechanism is arranged on the base;
the second elastic mechanism is arranged on the base;
the adjusting piece is used for controlling the first elastic mechanism to work and outputting a first range trigger pressure value corresponding to a first pressure trigger range when the input of the ultrasonic welding machine is in the first pressure trigger range; when the input is a second pressure trigger range, the first elastic mechanism and the second elastic mechanism are controlled to work simultaneously, and a second range trigger pressure value corresponding to the second pressure trigger range is output, wherein the second range trigger pressure value is larger than the first range pressure trigger value.
Preferably, the method further comprises the following steps:
the displacement sensor is used for detecting the compression displacement of the elastic force of the first elastic mechanism, generating a first displacement signal, performing pressure triggering on the ultrasonic welding machine and outputting a first range triggering pressure value; or,
the displacement sensor detects the compression displacement of the elastic force when the first elastic mechanism and the second elastic mechanism work simultaneously, generates a second displacement signal, performs pressure triggering on the ultrasonic welding machine, and outputs a second range triggering pressure value.
Preferably, the adjusting member includes:
the spring base is arranged on the base, one end of the first elastic mechanism is arranged on the spring base, and one end of the second elastic mechanism is arranged on the spring base;
the spring pressing plate is provided with a first number of blind holes and a second number of through holes, one end of the first elastic mechanism is installed in the first number of blind holes, the other end of the first elastic mechanism is installed on the spring base, one end of the second elastic mechanism is installed in the second number of through holes, and the other end of the second elastic mechanism is installed on the spring base;
the adjusting plate is connected with the spring pressing plate through an adjusting knob, is provided with a second number of holes and is used for installing the second number of cylindrical pins, and the part of the large radius end of each second number of cylindrical pins is inserted into the through hole of the spring pressing plate.
Preferably, the method further comprises the following steps:
and the adjusting knob is connected with the adjusting plate and is used for adjusting the adjusting plate to move up and down under the action of spring force.
Preferably, when the ultrasonic welding machine inputs the first pressure triggering range, the adjusting knob controls the adjusting plate to move upward to a first preset position, where the first preset position is a preset value reached by a distance between the lower ends of the second number of cylindrical pins and the upper end of the elastic force in the second elastic mechanism.
Preferably, when the input of the ultrasonic welding machine is in a first pressure triggering range, the adjusting knob controls the adjusting plate to move downwards to a second preset position, and the second preset position includes: the lower surface of the adjusting plate is in contact with the upper surface of the spring pressing plate.
Preferably, the method further comprises the following steps:
the displacement sensor pressing sheet is arranged on the spring pressing plate and moves up and down along with the spring pressing plate;
when the displacement sensor pressing sheet moves along with the spring pressing plate, the telescopic rod on the displacement sensor is driven to generate a displacement signal.
Preferably, the method further comprises the following steps:
the first elastic mechanism comprises 8 springs;
the second elastic mechanism comprises 12 springs.
In another aspect, an ultrasonic welding machine is provided, including: according to the above-mentioned trigger pressure adjustment mechanism.
In another aspect, a trigger pressure adjustment method is provided, including:
the ultrasonic welding machine receives an input pressure trigger range, wherein the pressure trigger range comprises: a first pressure trigger range and a second pressure trigger range;
the ultrasonic welding machine selects a first elastic mechanism to work through an adjusting piece according to the input pressure triggering range; or, the first elastic mechanism and the second elastic mechanism are selected to work simultaneously; wherein,
the ultrasonic welding machine comprises a base;
the first elastic mechanism is arranged on the base;
the second elastic mechanism is arranged on the base;
the adjusting piece controls the first elastic mechanism to work when the input of the ultrasonic welding machine is in a first pressure triggering range, and outputs a first range triggering pressure value corresponding to the first pressure triggering range; when the input is a second pressure trigger range, the first elastic mechanism and the second elastic mechanism are controlled to work simultaneously, a second range trigger pressure value corresponding to the second pressure trigger range is output, and the second range pressure trigger range value is larger than the first range pressure trigger range value.
Preferably, the method further comprises:
a displacement sensor on the ultrasonic welding machine detects the compression displacement of the elastic force of the first elastic mechanism, generates a first displacement signal, performs pressure triggering on the ultrasonic welding machine, and outputs a first range triggering pressure value; or,
the displacement sensor detects the compression displacement of the elastic force when the first elastic mechanism and the second elastic mechanism work simultaneously, generates a second displacement signal, performs pressure triggering on the ultrasonic welding machine, and outputs a second range triggering pressure value.
The method further comprises the following steps:
the displacement sensor pressing sheet on the ultrasonic welding machine is arranged on the spring pressing plate and moves up and down along with the spring pressing plate;
when the displacement sensor pressing sheet moves along with the spring pressing plate, the telescopic rod on the displacement sensor is driven to generate a displacement signal and send the displacement signal to the Microprogrammed Control Unit (MCU),
and the MCU triggers an ultrasonic generator on the ultrasonic welding machine to emit ultrasonic waves.
In another aspect, a trigger pressure adjusting device applied to an ultrasonic welding machine is provided, including:
a base;
a receiver for receiving an input pressure trigger range, wherein the pressure trigger range comprises: a first pressure trigger range and a second pressure trigger range;
the adjusting piece is used for selecting the first elastic mechanism to work according to the input pressure triggering range; or, the first elastic mechanism and the second elastic mechanism are selected to work simultaneously; wherein,
the first elastic mechanism is arranged on the base;
the second elastic mechanism is arranged on the base;
the adjusting piece controls the first elastic mechanism to work when the input of the ultrasonic welding machine is in a first pressure triggering range, and outputs a first range triggering pressure value corresponding to the first pressure triggering range; and when the input is a second pressure trigger range, controlling the second elastic mechanism to work, and outputting a second range trigger pressure value corresponding to the second pressure trigger range, wherein the second pressure trigger range value is larger than the first pressure trigger range value.
Preferably, the above apparatus further comprises:
the displacement sensor is used for detecting the compression displacement of the elastic force of the first elastic mechanism, producing a first displacement signal, performing pressure triggering of the ultrasonic welding machine and outputting a first range triggering pressure value; or,
the displacement sensor detects the compression displacement of the elastic force when the first elastic mechanism and the second elastic mechanism work simultaneously, generates a second displacement signal, performs pressure triggering on the ultrasonic welding machine, and outputs a second range triggering pressure value.
Preferably, the method further comprises the following steps:
the displacement sensor pressing sheet is arranged on the spring pressing plate and moves up and down along with the spring pressing plate;
when the displacement sensor pressing sheet moves along with the spring pressing plate, the telescopic rod on the displacement sensor is driven to generate a displacement signal and send the displacement signal to the Microprogrammed Control Unit (MCU);
and the MCU is used for triggering an ultrasonic generator on the ultrasonic welding machine to send out ultrasonic waves according to the displacement signal.
Through the technical scheme that the utility model provides, realize the output of different scope trigger pressure through first elasticity mechanism and second elasticity mechanism, the pressure that enlarges triggers selects the scope, has improved welded efficiency.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:
FIG. 1 is a schematic view of a pressure trigger mechanism of an ultrasonic plastic welder according to the related art;
FIG. 2 is a schematic view of a pressure trigger mechanism of an ultrasonic plastic welder according to the related art;
FIG. 3 is a flow chart of the control of the pressure trigger mechanism of an ultrasonic plastic welder according to the related art;
fig. 4 is a first schematic diagram of a trigger pressure adjustment mechanism according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a second trigger pressure adjustment mechanism according to an embodiment of the present invention;
fig. 6 is a schematic control diagram of a pressure trigger mechanism of an ultrasonic plastic welding machine according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
In one aspect, a trigger pressure adjustment mechanism is provided in an ultrasonic welding machine, comprising: a base;
the first elastic mechanism is arranged on the base;
the second elastic mechanism is arranged on the base;
the adjusting piece is used for controlling the first elastic mechanism to work and outputting a first range trigger pressure value corresponding to a first pressure trigger range when the input of the ultrasonic welding machine is in the first pressure trigger range; when the input is a second pressure trigger range, the first elastic mechanism and the second elastic mechanism are controlled to work simultaneously, and a second range trigger pressure value corresponding to the second pressure trigger range is output, wherein the second range trigger pressure value is larger than the first range pressure trigger value.
Through the above embodiment, the output of the trigger pressure in different ranges is realized through the first elastic mechanism and the second elastic mechanism, and the selection range of pressure trigger is expanded.
Preferably, the above apparatus further comprises: the displacement sensor is used for detecting the compression displacement of the elastic force of the first elastic mechanism, generating a first displacement signal, performing pressure triggering on the ultrasonic welding machine and outputting a first range triggering pressure value; or,
the displacement sensor detects the compression displacement of the elastic force when the first elastic mechanism and the second elastic mechanism work simultaneously, generates a second displacement signal, performs pressure triggering on the ultrasonic welding machine, and outputs a second range triggering pressure value.
Preferably, the adjusting member includes:
the spring base is arranged on the base, one end of the first elastic mechanism is arranged on the spring base, and one end of the second elastic mechanism is arranged on the spring base;
the spring pressing plate is provided with a first number of blind holes and a second number of through holes, one end of the first elastic mechanism is installed in the first number of blind holes, the other end of the first elastic mechanism is installed on the spring base, one end of the second elastic mechanism is installed in the second number of through holes, and the other end of the second elastic mechanism is installed on the spring base;
the adjusting plate is connected with the spring pressing plate through an adjusting knob, is provided with a second number of holes and is used for installing the second number of cylindrical pins, and the part of the large radius end of each second number of cylindrical pins is inserted into the through hole of the spring pressing plate.
The adjusting plate is connected with the spring pressing plate through an adjusting knob and an elastic component, and is provided with a second number of holes for mounting a second number of cylindrical pins, and one end part of each second number of cylindrical pins with large radius is inserted into the through hole of the spring pressing plate.
The elastic mechanism (spring module) of the trigger pressure in the preferred embodiment can be quickly switched to two different elastic mechanisms (compression spring module) through the mechanical adjusting mechanism so as to realize different trigger pressure control ranges, and the pressure trigger mechanism can select different gears and can be quickly switched according to needs.
Preferably, the method further comprises the following steps: and the adjusting knob is connected with the adjusting plate and controls the adjusting plate to move up and down under the action of the spring force.
Preferably, when the ultrasonic welding machine inputs a first pressure triggering range, the adjusting knob adjusts the adjusting plate to move upwards to a first preset position, and the first preset position is that the distance between the lower ends of the second number of cylindrical pins and the upper end of the elastic force in the first elastic mechanism reaches a preset value.
Preferably, when the input of the ultrasonic welding machine is in the second pressure triggering range, the adjusting knob adjusts the adjusting plate to move downwards to a second preset position, and the second preset position comprises: the lower surface of the adjusting plate is in contact with the upper surface of the spring pressing plate.
Preferably, the adjusting mechanism further comprises: the displacement sensor pressing sheet is arranged on the spring pressing plate and moves up and down along with the spring pressing plate;
wherein, when the displacement sensor preforming moved along with spring clamp plate, drive the telescopic link on the displacement sensor, generate displacement signal.
Through the preferred embodiment, the displacement is subjected to electromechanical signal conversion through the miniature displacement sensor, and the accuracy and the stability of pressure control are improved.
Preferably, the first resilient mechanism comprises 8 springs;
the second resilient mechanism comprises 12 springs.
In another aspect, an ultrasonic welding machine is provided, including: according to the above-mentioned trigger pressure adjustment mechanism. The structure of the trigger pressure adjusting mechanism in the ultrasonic welding machine is the same as that described above, and is not described in detail herein.
PREFERRED EMBODIMENTS
The preferred embodiment provides a trigger pressure control method, which is applied to an ultrasonic plastic welding machine, and in the preferred embodiment, different trigger pressure ranges can be quickly switched to accurately set corresponding trigger pressures according to different process requirements for welding plastic workpieces. The trigger pressure can be set to two range segments: a small pressure trigger pressure range and a large pressure trigger pressure range.
Next, a structure of the trigger pressure adjusting mechanism in the preferred embodiment is described, fig. 4 is a schematic view of a trigger pressure adjusting mechanism according to an embodiment of the present invention, fig. 5 is a schematic view of a trigger pressure adjusting mechanism according to an embodiment of the present invention, and the following detailed description is described with reference to fig. 4 and fig. 5.
As shown in fig. 4 and 5, 20 compression springs 317 are symmetrically distributed and embedded in the grooves of the spring base 301; the spring pressure plate 303 and the coupling shaft 307 are coupled together by a screw 318; the spring pressing plate 303 is fastened to the spring base 301 by two hinge screws 302, and the spring pressing plate 303 is guided by a polished rod portion of the hinge screws to move up and down.
It should be noted that, in the preferred embodiment, only 20 compression springs are taken as an example, in practice, a person skilled in the art may select a solution in the related art as the elastic force mechanism according to actual needs, and may select the number of springs according to the actual output pressure range value.
12 through holes and 8 blind holes are symmetrically distributed on the spring pressing plate 303; the bottom planes of the 8 blind holes are in contact with the top planes of the 8 compression springs 317;
12 small holes are symmetrically distributed on the adjusting plate 305, 12 shouldered cylindrical pins 309 can be installed, and the large-diameter end parts of the 12 cylindrical pins 309 are tightly inserted into the 12 through holes of the spring pressing plate 303.
The adjusting plate 305 is connected with the two compression springs 304 and the spring pressure plate 303 through two threaded adjusting knobs 306, and the adjusting plate 305 can move up and down by taking the adjusting knobs 306 as a guide; two screws 308 are mounted on the connecting shaft 307 as upper stops for the adjustment plate 305.
The micro displacement sensor 313 is fastened to the holder plate 314 by 4 screws 312, and the holder plate 314 is positioned on the spring base 301 by cylindrical pins 316 and fastened to the spring base 301 by screws 315. The displacement sensor wafer 310 is fastened to the spring clamp 303 with screws 311 and can move up and down together with the spring clamp 303.
In the present preferred embodiment, 20 springs are explained as an example of the elastic mechanism, 8 springs correspond to the first elastic mechanism, and 12 springs correspond to the second elastic mechanism.
The trigger pressure adjustment of this structure is described in detail below.
(1) When a small pressure trigger pressure range (equivalent to the first pressure trigger range in the above-described embodiment) is selected:
when the adjusting knob 306 is rotated, the adjusting plate 305 moves upwards against the adjusting plate 305 under the action of the compression spring 304 until the upper surface of the adjusting plate 305 contacts with the limit screw 308; in this state, the lower surfaces of the 12 shoulder pins 309 mounted on the adjustment plate 305 are separated from the corresponding 12 compression springs 317 by 5mm or more.
When the coupling shaft 307 is under the action of the power source, the spring pressing plate 303 and the displacement sensor pressing plate 310 arranged on the spring pressing plate 303 are driven to move downwards; because the adjusting plate 305 and the spring pressing plate 303 have a certain distance under the action of the adjusting knob 306 and the compression spring 304, the bottom planes of the 12 shoulder cylindrical pins installed on the adjusting plate 305 cannot contact the 12 springs installed on the spring base 301; i.e. in this mode, the 12 compression springs 317 are deactivated. The downward movement of the displacement sensor pressing sheet 310 pushes the telescopic rod on the micro displacement sensor 313, so that the micro displacement sensor 313 obtains a displacement signal to realize pressure triggering.
(2) When a large pressure trigger pressure range (equivalent to the second pressure trigger range described above) is selected:
by rotating the adjusting knob 306, the adjusting plate 305 drives the adjusting plate 305 to move downward under the action of the mutual thread pair of the adjusting knob 306 and the spring pressing plate 303 until the lower surface of the adjusting plate 305 is in close contact with the upper surface of the spring pressing plate 303. The lower flat surfaces of the 12 shouldered cylindrical pins 309 mounted on the adjustment plate 305 in this state are in contact with the upper flat surfaces of the corresponding 12 compression springs 317.
When the coupling shaft 307 is under the action of the power source, the spring pressing plate 303 and the displacement sensor pressing plate 310 arranged on the spring pressing plate 303 are driven to move downwards; because the adjusting plate 305 and the spring pressing plate 303 generate pressure with the bottom planes of the 12 shouldered cylindrical pins installed on the adjusting plate 305 and the upper surfaces of the 12 springs installed on the spring base 301 under the action of the adjusting knob 306; that is, in this mode, 12 compression springs 317 are simultaneously operated with 8 compression springs 317, and 20 compression springs 317 are formed to operate. The downward movement of the displacement sensor pressing sheet 310 pushes the telescopic rod on the micro displacement sensor 313, so that the micro displacement sensor 313 obtains a displacement signal to realize pressure triggering.
In the above embodiments, the first elastic mechanism and the second elastic mechanism are implemented by using compression springs, and those skilled in the art may use the same mechanism, for example, both the first elastic mechanism and the second elastic mechanism may use compression springs, or different mechanisms according to actual needs.
The present embodiment provides a pressure triggering method, and fig. 6 is a schematic control diagram of a pressure triggering mechanism of an ultrasonic plastic welding machine according to an embodiment of the present invention, and with reference to the above embodiments and preferred embodiments, the following process may be adopted for pressure triggering.
Selecting different spring module groups according to the pressure triggering requirements of different plastic welding workpieces; selecting a pressure trigger value through a touch screen; under the drive of a power source, the air cylinder or the servo system presses the spring module group downwards through the connecting shaft 307, the spring module group generates a pressing distance to drive the telescopic rod on the micro displacement sensor to move, different electric signals are output through the internal potentiometer and transmitted to the MCU control system, and the ultrasonic generator is triggered to emit ultrasonic waves.
This preferred embodiment can increase and decrease compression spring's quantity fast through mechanical adjustment mechanism, provides the trigger pressure of different scopes to different plastic work pieces, under the condition that need not to adjust the model, satisfies the welding requirement of different plastic work pieces. The plastic welding efficiency and the welded part qualification rate can be improved, and the use and maintenance cost of customers is reduced.
Through the embodiment, the trigger pressure adjusting mechanism, the trigger pressure adjusting method and the trigger pressure adjusting device are provided. According to the technical scheme, the miniature displacement sensor and the spring module are utilized, the driving welding head presses down and contacts the surface of the plastic welding workpiece, the compression spring module begins to deform under compression, and the compression amount of the compression spring is the displacement amount of the miniature displacement sensor. When the set trigger pressure is reached, the transducer emits ultrasound. The high-precision miniature displacement sensor is adopted to collect displacement signals, so that the trigger pressure of welding can be accurately controlled, and the yield of plastic welding workpieces is effectively improved. It should be noted that these technical effects are not possessed by all the embodiments described above, and some technical effects are obtained only by some preferred embodiments.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (9)
1. A trigger pressure adjusting mechanism is arranged on an ultrasonic welding machine and is characterized in that,
a base;
the first elastic mechanism is arranged on the base;
the second elastic mechanism is arranged on the base;
the adjusting piece is used for controlling the first elastic mechanism to work and outputting a first range trigger pressure value corresponding to a first pressure trigger range when the input of the ultrasonic welding machine is in the first pressure trigger range; when the input is a second pressure trigger range, the first elastic mechanism and the second elastic mechanism are controlled to work simultaneously, and a second range trigger pressure value corresponding to the second pressure trigger range is output, wherein the second range trigger pressure value is larger than the first range pressure trigger value.
2. The trigger pressure adjustment mechanism of claim 1, further comprising:
the displacement sensor is used for detecting the compression displacement of the elastic force of the first elastic mechanism, generating a first displacement signal, performing pressure triggering on the ultrasonic welding machine and outputting a first range triggering pressure value; or,
the displacement sensor detects the compression displacement of the elastic force when the first elastic mechanism and the second elastic mechanism work simultaneously, generates a second displacement signal, performs pressure triggering on the ultrasonic welding machine, and outputs a second range triggering pressure value.
3. The trigger pressure adjustment mechanism of claim 1, wherein the adjustment member comprises:
the spring base is arranged on the base, one end of the first elastic mechanism is arranged on the spring base, and one end of the second elastic mechanism is arranged on the spring base;
the spring pressing plate is provided with a first number of blind holes and a second number of through holes, one end of the first elastic mechanism is installed in the first number of blind holes, the other end of the first elastic mechanism is installed on the spring base, one end of the second elastic mechanism is installed in the second number of through holes, and the other end of the second elastic mechanism is installed on the spring base;
the adjusting plate is connected with the spring pressing plate through an adjusting knob, is provided with a second number of holes and is used for installing the second number of cylindrical pins, and the part of one end of each second number of cylindrical pins with a large radius is inserted into the through hole of the spring pressing plate.
4. The trigger pressure adjustment mechanism of claim 3, further comprising:
and the adjusting knob is connected with the adjusting plate and controls the adjusting plate to move up and down under the action of spring force.
5. The trigger pressure adjustment mechanism of claim 4,
when the ultrasonic welding machine inputs the first pressure triggering range, the adjusting knob controls the adjusting plate to move upwards to a first preset position, and the first preset position is that the distance between the lower ends of the second number of cylindrical pins and the upper end of the elastic force in the second elastic mechanism reaches a preset value.
6. The trigger pressure adjustment mechanism of claim 4,
when the input of the ultrasonic welding machine is in a first pressure triggering range, the adjusting knob controls the adjusting plate to move downwards to a second preset position, and the second preset position comprises: the lower surface of the adjusting plate is in contact with the upper surface of the spring pressing plate.
7. The trigger pressure adjustment mechanism of claim 3, further comprising:
the displacement sensor pressing sheet is arranged on the spring pressing plate and moves up and down along with the spring pressing plate;
when the displacement sensor pressing sheet moves along with the spring pressing plate, the telescopic rod on the displacement sensor is driven to generate a displacement signal.
8. The trigger pressure adjustment mechanism of any one of claims 1 to 7, further comprising:
the first elastic mechanism comprises 8 springs;
the second elastic mechanism comprises 12 springs.
9. An ultrasonic welding machine, comprising:
the trigger pressure adjustment mechanism of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201821471848.2U CN209008003U (en) | 2018-08-31 | 2018-08-31 | Trigger pressure regulating mechanism and ultrasonic welding machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821471848.2U CN209008003U (en) | 2018-08-31 | 2018-08-31 | Trigger pressure regulating mechanism and ultrasonic welding machine |
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| CN209008003U true CN209008003U (en) | 2019-06-21 |
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| CN201821471848.2U Active CN209008003U (en) | 2018-08-31 | 2018-08-31 | Trigger pressure regulating mechanism and ultrasonic welding machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112721184A (en) * | 2020-12-16 | 2021-04-30 | 上海骄成机电设备有限公司 | Welding method and welding system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112721184A (en) * | 2020-12-16 | 2021-04-30 | 上海骄成机电设备有限公司 | Welding method and welding system |
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