CN115071141A - Digital ultrasonic plastic welding machine - Google Patents
Digital ultrasonic plastic welding machine Download PDFInfo
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- CN115071141A CN115071141A CN202210665458.3A CN202210665458A CN115071141A CN 115071141 A CN115071141 A CN 115071141A CN 202210665458 A CN202210665458 A CN 202210665458A CN 115071141 A CN115071141 A CN 115071141A
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- 238000004023 plastic welding Methods 0.000 title claims abstract description 20
- 238000003466 welding Methods 0.000 claims abstract description 182
- 238000006073 displacement reaction Methods 0.000 claims abstract description 27
- 238000012544 monitoring process Methods 0.000 claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 230000002463 transducing effect Effects 0.000 claims abstract description 3
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- 238000000034 method Methods 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 11
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- 238000013459 approach Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/87—Auxiliary operations or devices
- B29C66/874—Safety measures or devices
- B29C66/8742—Safety measures or devices for operators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/922—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/9221—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the pressure, the force or the mechanical power
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/922—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/9231—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the displacement of the joining tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/9261—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
A digital ultrasonic plastic welding machine relates to the technical field of welding equipment, and comprises a frame, an ultrasonic generator, a welding head transducing assembly, an electric sliding table assembly and a workpiece jig, wherein the frame comprises a base and a side mounting frame; the welding machine further comprises an integrated control system and a displacement monitoring assembly, the displacement monitoring assembly comprises a grating displacement sensing mechanism, the grating displacement sensing mechanism comprises a grating ruler and a reading head, and the integrated control system is electrically connected with the grating ruler, the reading head, a pressure sensor and a servo motor. The welding machine can automatically set the working height of the welding head according to the welding parameters set in advance, and the operator is not required to be spent on manual debugging, so that the adaptability of the welding machine is improved.
Description
Technical Field
The invention relates to the technical field of welding equipment, in particular to a digital ultrasonic plastic welding machine.
Background
The ultrasonic welding machine is a solid phase welding machine, and the connection between welding pieces is realized by the high-frequency elastic vibration of an acoustic system and the clamping action of static pressure between workpieces. The electrical energy is converted by a power source (control box) into high-frequency electrical energy which is converted by a transducer into mechanical vibration which is transmitted to a welding head by a concentrator (amplitude transformer), and the welded parts are rubbed together at high speed under the vibration of the welding head. The combination of this high frequency vibration and the downward force of the gas pressure removes the film and oxides from the surface of the weldment, thus forming a strong weld. When the atoms between the weldments are mixed together, a metallurgical fusion is produced.
At present, the place where the welding machine carries out actual welding operation is a welding frame, the welding frame is provided with a machine head, a welding head (ultrasonic wave generation), a fixed base, a workpiece fixture, a welding module and other structures, the welding head is installed on the machine head, most of the movement of the welding head is controlled by a cylinder as a pressure unit, the distance between the cylinder and the workpiece fixture and the acting force are controlled, the cylinder control has a defect, the ascending and descending speed and the pressure during welding are controlled by an adjusting valve, the judgment is carried out through the experience of feeling during debugging, the accuracy is not enough, the control of the welding depth is not accurate enough, the output power of ultrasonic waves can be changed along with the change due to the change of the air pressure during welding, and high-precision and high-quality products are difficult to produce.
In addition, when the distance of the whole machine head relative to the fixed base needs to be adjusted, as shown in fig. 1 and fig. 2, the adjustment mode of the machine head displacement is realized by rotating the hand wheel to drive the meshing motion between the gear and the rack inside, so the manual adjustment mode cannot record the height of the machine head, the adjustment at each time needs technicians to debug continuously according to experience, time and labor are wasted, and errors easily exist in the manual adjustment mode.
In addition, because the working range area is arranged between the welding head and the workpiece fixture, if an operator holds the workpiece and extends into the working range area carelessly, the operator is easy to cause work injury, especially, the ultrasonic wave can shake and break bones, and the injury is high.
Accordingly, there is a need for an improved digital ultrasonic plastic welding machine.
Disclosure of Invention
Aiming at the defects that the equipment form and the operation method of an injection device are complicated due to the inconsistency of an antistatic agent specified by a process kit in the prior art, the invention aims to provide a digital ultrasonic plastic welding machine, and the specific scheme is as follows:
a digital ultrasonic plastic welding machine comprises a frame, an ultrasonic generator, a welding head transducing assembly, an electric sliding table assembly and a workpiece jig, wherein the frame comprises a base and a side mounting frame arranged on one side of the base;
the welding machine further comprises an integrated control system and a displacement monitoring assembly, the displacement monitoring assembly comprises a grating displacement sensing mechanism, the grating displacement sensing mechanism comprises a grating ruler and a reading head which are respectively installed on the side installation frame and the electric sliding table assembly, the grating ruler and the reading head are mutually matched, the integrated control system is arranged on one side of the side installation frame, and the integrated control system is electrically connected with the grating ruler, the reading head, the pressure sensor and the servo motor;
the working process of the welding machine comprises the following steps:
setting the height of a standard workpiece: an operator places a standard workpiece on a workpiece fixture, operates the integrated control system, the servo motor works to drive the welding head to move to gradually approach the standard workpiece until the welding head contacts the standard workpiece, meanwhile, the integrated control system reads data of the pressure sensor all the time, and reads grating ruler data when the pressure sensor is kept at a certain pressure value, wherein the grating ruler data at the moment is the height of the standard workpiece;
setting a working point: the welding head continues moving downwards, when the data of the pressure sensor changes and keeps another pressure value, the integrated control system records the data of the grating ruler to obtain the position information of the working point, and the welding head is reset after the completion;
checking the size of a workpiece to be processed: setting an error value in the integrated control system, then placing the workpiece to be processed on the workpiece fixture, similarly to the step of setting the height of the standard workpiece, if the difference between the data measured by the grating ruler and the working point is within the error value, the workpiece to be processed is qualified, and if the difference is not within the error value, the next workpiece to be processed is replaced;
welding a workpiece to be processed: and after the size of the workpiece to be processed is qualified, the welding head continuously moves downwards to move to the position of the working point, the ultrasonic generator does work, the ultrasonic generator acts on the welding head through the welding head energy conversion assembly, the welding head performs welding operation on the workpiece to be processed for a certain time, and the welding head is reset after the welding operation is completed.
Furthermore, in the step of welding the workpiece to be machined by the welding machine, a reaction delay time period is set in the welding head energy conversion assembly, and after the reaction delay time period is timed, the welding head starts to generate ultrasonic vibration.
Furthermore, when the welding head gradually approaches to the workpiece, the pressure value data of the pressure sensor is increased, the integrated control system sends out an alarm signal, and the integrated control system controls the electric sliding table assembly to drive the welding head energy conversion assembly and the welding head to reset.
Furthermore, the integrated control system comprises an operation platform, a communication platform and an integrated controller arranged in the communication platform, wherein the operation platform and the communication platform are electrically connected with the integrated controller;
the operation table is used for triggering the integrated controller, and then the integrated controller controls the servo motor to work;
the communication platform is used for displaying and manually modifying the working parameters of the welding machine.
Furthermore, the welding head energy conversion assembly comprises an outer cover, and a movable seat, a limiting cover, an energy converter body and an ADC (analog to digital converter) conversion module which are arranged in the outer cover, wherein the movable seat is exposed out of one side of the outer cover and is matched with the electric sliding table assembly;
one end of the movable seat is detachably and fixedly connected with the limiting cover, an energy converter fixing hole is formed between the movable seat and the limiting cover, the energy converter body is arranged in the energy converter fixing hole, and the lower end of the energy converter body is connected with the welding head;
and the ADC conversion module is embedded at the other end of the movable seat and is electrically connected with the pressure sensor.
Furthermore, the upper end of the outer cover is provided with a heat dissipation hole and a heat dissipation fan.
Furthermore, the electric sliding table assembly further comprises a fixed sliding table, a sliding table cover plate, a linear sliding rail, a ball screw sliding table and a sliding table sliding block, wherein the fixed sliding table is embedded on the side mounting frame, and the sliding table cover plate is matched with the side mounting frame to cover the fixed sliding table;
the ball screw sliding table is arranged between the fixed sliding table and the sliding table cover plate, the sliding table sliding block is assembled on the ball screw sliding table in a matching mode, sliding guide parts are formed on two sides of the sliding table sliding block, and the servo motor is installed on the side installation frame and is in transmission connection with the ball screw sliding table;
the fixed sliding table is connected with two linear sliding rails which are arranged at intervals, each linear sliding rail is slidably arranged on the corresponding guide sliding portion in a penetrating mode, and one side of each guide sliding portion extends out of the corresponding sliding table cover plate to be connected with the corresponding movable seat.
Furthermore, the reading head is arranged on the side wall of the sliding guide part, and the sliding guide part is positioned on the upper side and the lower side of the reading head and is respectively provided with an upper limit plate and a lower limit plate.
Further, the side mounting bracket sets up the cuboid box body structure that forms for the concatenation of a plurality of exterior sheathing boards, side mounting bracket internally mounted has the baffle that a plurality of intervals set up, just one side of side mounting bracket be formed with the installation space of fixed slip table adaptation.
Furthermore, the displacement monitoring subassembly still includes proximity switch, lower proximity switch, the side mounting bracket is located upside, the downside of grating chi are equipped with respectively go up proximity switch, lower proximity switch.
Compared with the prior art, the invention has the following beneficial effects:
(1) in the welding machine, the pressure sensor, the servo motor and the electric sliding table assembly of the sliding table are adopted to form a positioning pressure unit of the welding head, the grating displacement sensing mechanism is matched to record the height of the welding head, the welding head and the workpiece fixture are only required to be replaced when the workpiece is replaced each time, and the working parameters related to the welding head and the servo motor, which are recorded in the integrated control system before, are restored, so that the welding machine can be continuously used, the requirement on the operating experience of an operator is lowered, and the replacement time is shortened.
(2) The integrated controller moves the welding head to the starting point, resets and stops working to give an alarm, so that the integrated controller actually protects operators and reduces industrial injury of the operators.
Drawings
FIG. 1 is a general schematic view of a prior art welder;
FIG. 2 is a schematic view of a prior art welding machine showing height adjustment via a hand wheel and a rack;
FIG. 3 is an overall schematic diagram of an embodiment of the present invention;
FIG. 4 is a schematic view of the display rack of the present invention;
FIG. 5 is a schematic structural view showing a detailed structure of the electric slide table assembly according to the present invention;
FIG. 6 is a schematic structural diagram showing a specific structure of a transducer assembly of the bond head according to the present invention;
fig. 7 is a schematic diagram showing the connection between the integrated controller and the pressure controller according to the present invention.
Reference numerals: 1. welding a head; 2. a frame; 21. a base; 22. a side mounting bracket; 3. an electric slipway assembly; 31. fixing the sliding table; 32. a slipway cover plate; 33. a linear slide rail; 34. a ball screw sliding table; 35. a sliding table sliding block; 36. a slide guide part; 37. a servo motor; 4. a weld head transducer assembly; 41. a housing; 42. a movable seat; 43. a limit cover; 44. a transducer body; 45. an ADC conversion module; 5. a workpiece fixture; 6. an integrated control system; 61. an operation table; 62. a communication platform; 63. an integrated controller; 7. a grating displacement sensing mechanism; 71. a grating scale; 72. a reading head; 8. an upper proximity switch; 9. a lower proximity switch; 10. an upper limit plate; 11. a lower limit plate; 12. a partition plate; 13. heat dissipation holes; 14. a heat dissipation fan.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.
Aiming at the problems of manual operation debugging and accidental injury of operators of the existing welding machine in the background technology, the invention provides a digital ultrasonic plastic welding machine, which is improved at two places of a mechanical structure and a working process and is matched with each other, so that the possibility of accidental injury of the operators is reduced when the welding machine works, meanwhile, when the welding machine needs to process workpieces with different specifications, as the corresponding welding head 1 and the corresponding workpiece fixture 5 need to be replaced, after the replacement, the welding machine can automatically set the working height of the welding head 1 according to the welding parameters set previously, and the manual debugging is not needed to be carried out by spending too much energy of the operators, thereby improving the adaptability of the welding machine.
Specifically, in terms of mechanical structure, the welding machine comprises a frame 2, an ultrasonic generator, a welding head 1, a welding head transducer assembly 4, an electric sliding table assembly 3 and a workpiece fixture 5, and compared with the existing welding machine, the frame 2, the ultrasonic generator, the welding head 1 and the workpiece fixture 5 in the invention are structurally similar, so that the ultrasonic generator, the welding head 1 and the workpiece fixture 5 in the invention are not described in detail, and the frame 2 in the invention is correspondingly improved in order to realize the automatic debugging.
As shown in fig. 3, the whole frame 2 that is L font, including base 21 and the side mounting bracket 22 of locating base 21 one side, side mounting bracket 22 sets up the cuboid box body structure that a plurality of outer mounting panel concatenations formed, and the uncovered setting in one side, side mounting bracket 22 internally mounted have the baffle 12 that a plurality of intervals set up. The opening of the side mounting frame 22 is provided with an electric sliding table assembly 3, the electric sliding table assembly 3 adopts a device which drives the sliding table to move by a servo motor 37, and the electric sliding table assembly 3 is a device which can perform reciprocating motion along the height direction of the side mounting frame 22, in the embodiment, the reciprocating motion in the height direction of the side mounting frame 22 is up-and-down lifting motion, a welding head transducer assembly 4 is installed on the electric sliding table assembly 3 in a linkage manner, and a welding head 1 is connected to the bottom end of the welding head transducer assembly 4, therefore, when the servo motor 37 on the electric sliding table assembly 3 rotates, the welding head 1 can perform up-and-down lifting motion, thereby gradually approaching to a workpiece until the workpiece is contacted to perform ultrasonic welding and resetting after the welding work is completed, moreover, a pressure sensor is installed on the welding head 1, and in the process that the welding head 1 is contacted with the workpiece, the pressure sensor is extruded to monitor the change of the pressure value, the monitored electrical signals are used for the subsequent function of preventing accidental injury of the operator.
Referring to fig. 4 and 6, in order to ensure stable installation of the welding head 1 and mechanical vibration generated by high-frequency power transmitted to the welding head 1, the welding head transducer assembly 4 includes a housing 41, and a movable seat 42, a limit cover 43, a transducer body 44 and an ADC conversion module 45 which are disposed inside the housing 41.
The movable seat 42 is L-shaped as a whole, one side of the movable seat 42 exposed out of the outer cover 41 is matched with the electric sliding table assembly 3, one end of the movable seat 42 and the limiting cover 43 are detachably and fixedly connected, a transducer fixing hole is formed between the two ends of the movable seat and the limiting cover, a transducer body 44 is arranged in the transducer fixing hole, and the lower end of the transducer body 44 is connected with the welding head 1. The ADC conversion module 45 is embedded at the other end of the movable seat 42, electrically connected to the pressure sensor, and configured to convert an analog signal and a digital signal.
Optimally, the upper end of the outer cover 41 is provided with the heat dissipation holes 13 and the heat dissipation fan 14, in the welding operation process, heat generated by the ADC conversion module 45 and the energy converter body 44 can be discharged from the heat dissipation holes 13, and meanwhile, the heat dissipation fan 14 drives air to flow in the working process, so that air exchange is promoted, and heat inside the outer cover 41 is taken away.
With reference to fig. 5 and 6, in order to cooperate with the operation of the servo motor 37, the electric sliding table assembly 3 further includes a fixed sliding table 31, a sliding table cover plate 32, a linear sliding rail 33, a ball screw sliding table 34, and a sliding table sliding block 35, wherein the fixed sliding table 31 is embedded in an opening of the side mounting frame 22, and an installation space adapted to the fixed sliding table 31 is formed at the opening. The slide cover 32 cooperates with the side mount 22 to cover the fixed slide 31. The ball screw sliding table 34 is arranged between the fixed sliding table 31 and the sliding table cover plate 32, the sliding table sliding block 35 is assembled on the ball screw sliding table 34 in a matching mode, the sliding guide portions 36 are formed on two sides of the sliding table sliding block 35, and the servo motor 37 is installed on the side installation frame 22 and is in transmission connection with the ball screw sliding table 34. The fixed sliding table 31 is connected with two linear sliding rails 33 arranged at intervals, each linear sliding rail 33 slides on and penetrates through a sliding guide part 36, and one side of each sliding guide part 36 extends out of a sliding table cover plate 32 and is fixedly connected with the movable seat 42.
Therefore, when the servo motor 37 is operated to rotate, the ball screw sliding table 34 drives the sliding table slider 35 to move, and under the guiding action of the linear sliding rail 33, the sliding table slider 35 stably moves relative to the fixed sliding table 31, and meanwhile, due to the arrangement of the sliding guide part 36, the sliding table slider 35 drives the movable seat 42 to move when moving, so as to realize the movement of the welding head 1.
As for the base 21, the workpiece fixture 5 is disposed on the base 21, and the workpiece fixture 5 is used for placing a workpiece, in this embodiment, as shown in fig. 4, the workpiece fixture 5 includes a fixing head cooperating with the welding head 1, and a bottom mold supporting the fixing head, and after the bottom mold is fixed on the base 21, the fixing head can be adjusted to align with the base according to the position of the welding head 1.
It should be noted that, in the welding process of the welding machine in the prior art, when the specifications of workpieces are different and the initial position of the welding head 1 needs to be adjusted, an operator rotates the hand wheel to drive the whole machine head to move, and continuously adjusts the machine head until the position of the welding head 1 is proper, so that the distance between the welding head 1 and the workpiece fixture 5 is reasonable, then the air cylinder drives the welding head 1 to descend relative to the machine head and perform ultrasonic welding operation with the workpieces, which can be comprehensively obtained, and two different height adjustments need to be performed during the welding operation. However, in a manner that the air cylinder is used as power to act on the welding head 1 to generate pressure, if the air source is unstable, the pressure generated by the welding head 1 is also unstable, so that the machining precision is affected, and if a height error occurs when the heights of the welding head and the welding head 1 are manually adjusted, the working point of the welding head 1 for welding operation is inaccurate, even if the position of the welding head 1 is correct in the process of adjusting the position of the welding head, if the air source of the air cylinder is unstable, the inaccuracy of the working point of the welding head 1 can be caused when the welding head 1 is driven to move independently subsequently due to the limited movement range of the air cylinder.
In the invention, in order to avoid the defects, the movement of the welding head 1 is driven by the servo motor 37, and the electric sliding table assembly 3 always drives the whole formed by the welding head energy conversion assembly 4 and the welding head 1 to generate position change so as to carry out lifting movement, so that two times of height adjustment movement is not needed, on the premise of ensuring reasonable and simple structure, the height of the welding head 1 is accurately controlled through the matching between the servo motor 37 and the sliding table, the uniformity of each working point is ensured, the processing precision is improved, and the problem that the position of the welding head 1 is deviated due to the deviation of the head position in the prior art is also avoided.
As shown in fig. 4, in order to control the positioning of the butt joint 1 by the electric sliding table assembly 3, the welding machine further includes an integrated control system 6 and a displacement monitoring assembly, and according to information fed back to the integrated control system 6 by the displacement monitoring assembly, the integrated control system 6 controls the working state of the electric sliding table assembly 3, thereby adjusting the position of the welding head 1. The displacement monitoring assembly comprises a grating displacement sensing mechanism 7 which is a measurement feedback device working by utilizing the optical principle of a grating and can be used for detecting the linear displacement in a servo system, so that the displacement monitoring assembly is used for detecting the displacement of the welding head 1 driven by the electric sliding table assembly 3 in the invention, and in combination with fig. 5 and 6, the grating displacement sensing mechanism 7 comprises a grating ruler 71 and a reading head 72 which are respectively arranged on the side mounting frame 22 and the electric sliding table assembly 3, specifically, the reading head 72 is arranged on the side wall of the sliding guide part 36, the upper limiting plate 10 and the lower limiting plate 11 are respectively arranged on the upper side and the lower side of the reading head 72 of the sliding guide part 36, and when the reading head 72 is arranged, the upper limiting plate 10 and the lower limiting plate 11 are mutually matched to position the reading head 72.
The grating ruler 71 and the reading head 72 are matched with each other, when the servo motor 37 rotates to drive the welding head 1 to approach a workpiece, and the position of the welding head 1 needs to be recorded, the position between the reading head 72 and the grating ruler 71 can be monitored by data on the grating ruler 71 based on an optical principle, the monitored data are fed back to the integrated control system 6 and then recorded, and subsequent calling is facilitated.
The side mounting frame 22 is located on the upper side and the lower side of the grating ruler 71 and is respectively provided with an upper proximity switch 8 and a lower proximity switch 9 which are electrically connected with the integrated controller 63, the upper proximity switch 8 and the lower proximity switch 9 are used for being matched with the reading head 72, in the process that the reading head 72 moves along with the guide sliding part 36, if the reading head 72 is close to a certain distance with the upper proximity switch 8 and the lower proximity switch 9, the upper proximity switch 8 or the lower proximity switch 9 is triggered and fed back to the integrated controller 63, a command for controlling the servo motor 37 to stop working is sent out, and the situation that the integrated control system 6 cannot monitor the welding head 1 is avoided.
As shown in fig. 7, in order to realize the intelligent monitoring of the grating displacement sensing mechanism 7, the integrated controller 63 is electrically connected to the grating scale 71 and the reading head 72, and in addition, in order to realize the control of the operation of the servo motor 37, the input end of the integrated controller 63 is electrically connected to the pressure sensor, the output end of the integrated controller 63 is electrically connected to the servo motor 37, the integrated controller 63 performs conversion and calculation to output a corresponding command to the servo motor 37 by monitoring an electrical signal obtained by a pressure value through the pressure sensor.
It should be noted that the integrated controller 63 includes a CPU computing unit and a power amplifier driving unit, the CPU computing unit is connected to an ADC conversion module 45, where the ADC conversion module 45 is the ADC conversion module 45 in the welding head transducer assembly 4. The ADC conversion module 45 is used for converting between analog signals and digital signals, the ADC conversion module 45 is used for connecting with the pressure sensor, and the power amplifier driving unit is connected with three phases of the servo motor 37 by using an amplifying circuit.
As for the operation table 61, the operation table 61 is integrated on one side of the base 21 away from the side mounting frame 22, and after the operation table 61 is used for triggering the integration controller 63, the integration controller 63 controls the servo motor 37 to work again, specifically, the operation table 61 is formed with two operation buttons, which are high enough for an operator to operate, and after the operation buttons are pressed, the servo motor 37 works to drive the welding head 1 to move.
The working process of the welding machine comprises the following steps:
setting the height of a standard workpiece: an operator places a standard workpiece on the workpiece fixture 5, operates the integrated control system 6, the servo motor 37 works to drive the welding head 1 to move to gradually approach the standard workpiece until the welding head contacts the standard workpiece, meanwhile, the integrated control system 6 reads data of the pressure sensor all the time, and reads data of the grating ruler 71 when the pressure sensor is kept at a certain pressure value, and the data of the grating ruler 71 at the moment is the height of the standard workpiece;
setting a working point: the welding head 1 continues moving downwards, when the data of the pressure sensor changes and keeps another pressure value, the data of the grating ruler 71 at the moment is a working point, the integrated control system 6 records the data of the grating ruler 71 to obtain the position information of the working point, and the welding head 1 is reset after the completion;
checking the size of a workpiece to be processed: setting an error value in the integrated control system 6, then placing the workpiece to be processed on the workpiece fixture 5, similarly to the step of setting the height of the standard workpiece, if the difference between the data measured by the grating ruler 71 and the working point is within the error value, the workpiece to be processed is qualified, and if the difference is not within the error value, the next workpiece to be processed is replaced;
welding a workpiece to be processed: after the size of the workpiece to be processed is qualified, the welding head 1 continues to move downwards and moves to the position of the working point, the ultrasonic generator does work, the ultrasonic generator acts on the welding head 1 through the welding head energy conversion assembly 4, the welding head 1 performs welding operation on the workpiece to be processed for a certain time, and the welding head 1 resets after the welding operation is completed.
After several preceding steps are successfully accomplished, because the device that the welding machine realized giving soldered connection 1 the ultrasonic wave that will produce is soldered connection transducer assembly 4, power after the ultrasonic wave was sent is enough to shatter the bone in addition, in order to avoid causing irreversible industrial injury to operating personnel, in carrying out the work piece welding step of waiting to process, soldered connection transducer assembly 4 is set for there is a reaction delay time period, this reaction delay time period is set for by operating personnel according to the experience, it is enough to satisfy that operating personnel will wait to process the work piece and successfully place on work piece tool 5, after the reaction delay time period timing is accomplished, soldered connection 1 begins to produce the ultrasonic vibration.
When the welding head 1 is close to the workpiece gradually, the representative operator carelessly extends the hand into the working range area, the pressure value data of the pressure sensor becomes large, the integrated control system 6 sends out an alarm signal, and the integrated control system 6 controls the electric sliding table assembly 3 to drive the welding head energy conversion assembly 4 and the welding head 1 to reset.
In summary, in the welding machine of the present invention, the pressure sensor, the servo motor 37 and the electric sliding table assembly 3 of the sliding table are combined to form a positioning pressure unit of the welding head 1, the grating displacement sensing mechanism 7 is matched to record the height of the welding head 1, and only the welding head 1 and the workpiece fixture 5 need to be replaced from the transducer body 44 every time the workpiece is replaced, and the working parameters related to the welding head 1 and the servo motor 37, which are recorded in the integrated control system 6 before, are restored, and are continuously used, so that the requirements on the operation experience of operators are reduced, and the replacement time is shortened.
Secondly, the welding head 1 is provided with a pressure sensor and a grating ruler 71 correspondingly, the pressure of the pressure sensor is monitored all the time in the process that the welding head 1 moves to the workpiece position, if the pressure is increased, the process that the welding head moves to the workpiece position is blocked, the integrated controller 63 moves the welding head 1 to the starting point position, resets, and stops working to send an alarm, so that the protection to operators is actually achieved, and the work injury of the operators is reduced.
Thirdly, the existing ultrasonic plastic welding machine does not have the checking function before machining, so that materials are wasted, the problem that materials cannot be found after machining or the problem that welding technology cannot be found, the step of checking the size of the workpiece to be machined is set, if the error value is displayed to be exceeded, the error value between the workpiece to be machined and a standard workpiece is too large, the workpiece belongs to an unqualified workpiece, the integrated controller 63 moves the welding head 1 to the position of a starting point, resets, and stops working to send an alarm. And after the next workpiece to be processed is replaced, the welding head 1 is controlled to move again through the operating platform. The screening of bad original workpieces is realized before welding operation, and the yield is improved.
Thirdly, the ultrasonic plastic welding machine of the invention sets the step of setting the height of the standard workpiece and the step of setting the working point, and the working point is set, so long as the function key of 'searching the working point' is pressed, an experienced technician is not needed, a common operator can operate the machine, a tool is not needed, one key is used for completing the operation, the accuracy is higher than that of the common manual operation, and the operation can be completed in several seconds.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. A digital ultrasonic plastic welding machine comprises a frame (2), an ultrasonic generator, a welding head (1), a welding head transducing assembly (4), an electric sliding table assembly (3) and a workpiece fixture (5), the frame (2) comprises a base (21) and a side mounting rack (22) arranged on one side of the base (21), it is characterized in that the base (21) is provided with the workpiece fixture (5), the electric sliding table assembly (3) is arranged on the side mounting rack (22), the electric sliding table assembly (3) adopts a device which drives the sliding table to move by a servo motor (37), the electric sliding table assembly (3) is provided with the welding head transducer assembly (4) in a linkage manner, the bottom end of the welding head energy conversion assembly (4) is connected with the welding head (1), and a pressure sensor is arranged on the welding head (1);
the welding machine further comprises an integrated control system (6) and a displacement monitoring assembly, the displacement monitoring assembly comprises a grating displacement sensing mechanism (7), the grating displacement sensing mechanism (7) comprises a grating ruler (71) and a reading head (72) which are respectively installed on the side installation rack (22) and the electric sliding table assembly (3), the grating ruler (71) and the reading head (72) are mutually matched, the integrated control system (6) is arranged on one side of the side installation rack (22), and the integrated control system (6) is electrically connected with the grating ruler (71), the reading head (72), a pressure sensor and a servo motor (37);
the working process of the welding machine comprises the following steps:
setting the height of a standard workpiece: an operator places a standard workpiece on a workpiece fixture (5), operates the integrated control system (6), the servo motor (37) works to drive the welding head (1) to move to gradually approach the standard workpiece until the welding head contacts the standard workpiece, meanwhile, the integrated control system (6) reads data of the pressure sensor all the time, when the pressure sensor is kept at a certain pressure value, the data of the grating ruler (71) is read, and the data of the grating ruler (71) at the moment is the height of the standard workpiece;
setting a working point: the welding head (1) moves downwards continuously, when the data of the pressure sensor changes and keeps another pressure value, the integrated control system (6) records the data of the grating ruler (71) to obtain the position information of the working point, and the welding head (1) resets after the completion;
checking the size of a workpiece to be processed: setting an error value in the integrated control system (6), then placing the workpiece to be processed on the workpiece fixture (5), similarly setting the height of the standard workpiece, wherein if the difference between the data measured by the grating ruler (71) and the working point is within the error value, the workpiece to be processed is qualified, and if the difference is not within the error value, the next workpiece to be processed is replaced;
welding a workpiece to be processed: after the size of the workpiece to be machined is qualified, the welding head (1) continues to move downwards to move to the position of the working point, the ultrasonic generator does work, the ultrasonic generator acts on the welding head (1) through the welding head energy conversion assembly (4), the welding head (1) performs welding operation on the workpiece to be machined for a certain time, and the welding head (1) resets after the welding operation is completed.
2. The digital ultrasonic plastic welding machine according to claim 1, characterized in that the welding head transducer assembly (4) is set with a reaction delay time period during the welding step of the workpiece to be processed, and the welding head (1) starts to generate ultrasonic vibration after the reaction delay time period is timed out.
3. The digital ultrasonic plastic welding machine according to claim 1, characterized in that when the welding head (1) is gradually close to the workpiece, the pressure value data of the pressure sensor becomes large, the integrated control system (6) sends out an alarm signal, and the integrated control system (6) controls the electric sliding table assembly (3) to drive the welding head transduction assembly (4) and the welding head (1) to reset.
4. The digital ultrasonic plastic welding machine according to claim 1, characterized in that the integrated control system (6) comprises an operation table (61), a communication platform (62) and an integrated controller (63) arranged inside the communication platform (62), wherein the operation table (61) and the communication platform (62) are electrically connected with the integrated controller (63);
the operating platform (61) is used for triggering the integrated controller (63), and then the integrated controller (63) controls the servo motor (37) to work;
the communication platform (62) is used for displaying and manually modifying the working parameters of the welding machine.
5. The digital ultrasonic plastic welding machine according to claim 4, wherein the welding head transducer assembly (4) comprises an outer cover (41), and a movable seat (42), a limit cover (43), a transducer body (44) and an ADC conversion module (45) which are arranged inside the outer cover (41), wherein one side of the movable seat (42) exposed out of the outer cover (41) is matched with the electric sliding table assembly (3);
one end of the movable seat (42) is detachably and fixedly connected with the limiting cover (43), a transducer fixing hole is formed between the movable seat and the limiting cover, the transducer body (44) is arranged in the transducer fixing hole, and the lower end of the transducer body (44) is connected with the welding head (1);
and the ADC conversion module (45) is embedded at the other end of the movable seat (42) and is electrically connected with the pressure sensor.
6. The digital ultrasonic plastic welding machine according to claim 5, characterized in that the upper end of the housing (41) is provided with heat dissipation holes (13) and a heat dissipation fan (14).
7. The digital ultrasonic plastic welding machine according to claim 1, wherein the electric sliding table assembly (3) further comprises a fixed sliding table (31), a sliding table cover plate (32), a linear sliding rail (33), a ball screw sliding table (34) and a sliding table slider (35), the fixed sliding table (31) is embedded on the side mounting frame (22), and the sliding table cover plate (32) is matched with the side mounting frame (22) to cover the fixed sliding table (31);
the ball screw sliding table (34) is arranged between the fixed sliding table (31) and the sliding table cover plate (32), the sliding table sliding block (35) is assembled on the ball screw sliding table (34) in a matching mode, guide sliding parts (36) are formed on two sides of the sliding table sliding block (35), and the servo motor (37) is installed on the side installation frame (22) and is in transmission connection with the ball screw sliding table (34);
the fixed sliding table (31) is connected with two linear sliding rails (33) arranged at intervals, each linear sliding rail (33) slides on to penetrate through one sliding guide part (36), and one side of the sliding guide part (36) extends out of the sliding table cover plate (32) and is connected with the movable seat (42).
8. The digital ultrasonic plastic welding machine according to claim 7, characterized in that the reading head (72) is mounted on the side wall of the guiding and sliding part (36), and the upper and lower sides of the guiding and sliding part (36) on the reading head (72) are respectively provided with an upper limit plate (10) and a lower limit plate (11).
9. The digital ultrasonic plastic welding machine according to claim 1, characterized in that the side mounting frame (22) is provided with a cuboid box structure formed by splicing a plurality of outer mounting plates, a plurality of partition plates (12) arranged at intervals are arranged inside the side mounting frame (22), and an installation space matched with the fixed sliding table (31) is formed on one side of the side mounting frame (22).
10. The digital ultrasonic plastic welding machine according to claim 9, characterized in that the displacement monitoring assembly further comprises an upper proximity switch (8) and a lower proximity switch (9), and the upper proximity switch (8) and the lower proximity switch (9) are respectively arranged on the upper side and the lower side of the side mounting frame (22) on the grating ruler (71).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210665458.3A CN115071141A (en) | 2022-06-13 | 2022-06-13 | Digital ultrasonic plastic welding machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210665458.3A CN115071141A (en) | 2022-06-13 | 2022-06-13 | Digital ultrasonic plastic welding machine |
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| CN115071141A true CN115071141A (en) | 2022-09-20 |
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| CN202210665458.3A Pending CN115071141A (en) | 2022-06-13 | 2022-06-13 | Digital ultrasonic plastic welding machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116944766A (en) * | 2023-09-19 | 2023-10-27 | 津上智造智能科技江苏有限公司 | High-precision welding pin mechanism |
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| CN107262907A (en) * | 2017-07-19 | 2017-10-20 | 上海峥集机械设备有限公司 | A kind of full servo supersonic welder |
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| CN215040379U (en) * | 2021-03-24 | 2021-12-07 | 汇源印刷包装科技（天津）股份有限公司 | Ultrasonic welding detection device |
| CN215393124U (en) * | 2021-07-22 | 2022-01-04 | 东莞市欣宇超声波机械有限公司 | Flexible servo ultrasonic welding equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107262907A (en) * | 2017-07-19 | 2017-10-20 | 上海峥集机械设备有限公司 | A kind of full servo supersonic welder |
| CN212097576U (en) * | 2020-02-27 | 2020-12-08 | 厦门长昕电子科技有限公司 | Novel ultrasonic welding machine |
| CN215040379U (en) * | 2021-03-24 | 2021-12-07 | 汇源印刷包装科技（天津）股份有限公司 | Ultrasonic welding detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116944766A (en) * | 2023-09-19 | 2023-10-27 | 津上智造智能科技江苏有限公司 | High-precision welding pin mechanism |
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