Welding device for welding breathable film

Abstract

The utility model discloses a welding device for welding a breathable film. The welding device comprises a machine body, a positioning bottom die, a welding assembly and a lifting driving mechanism. The positioning bottom die is provided with a positioning cavity used for containing a to-be-welded workpiece so that an air hole of the to-be-welded workpiece can be formed upwards. The welding assembly comprises a heat conduction base, a welding head and an electric heating core, the electric heating core is arranged in the heat conduction base, the welding head is connected with the heat conduction base, a hot pressing face is arranged at the bottom of the welding head, and the outline of the hot pressing face corresponds to the structure of an air hole of a workpiece to be welded. The lifting driving mechanism comprises a servo electric cylinder, and the servo electric cylinder is connected with the welding assembly so as to drive the welding assembly to ascend and descend. According to the welding device, the welding effect between the to-be-welded workpiece and the breathable film is good, and the reject ratio is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to a breathable membrane welding equipment technical field especially relates to a kind of welding device for breathable membrane welding. BACKGROUND

[0002] Part of the parts in the car need to be provided with breathable membrane, for example, the electronic control unit of the car needs to rely on safe and reliable sealed box to protect, avoid water, oil stain, dust and other pollutants, and gas hole is provided on the sealed box, breathable membrane is provided on the gas hole, can allow internal and external ventilation, reduce pressure difference, reduce sealed fatigue and shell pressure to very low, to improve reliability and prolong the service life of product. Among them, in the production process, breathable membrane needs to be welded on the gas hole of the workpiece to be welded, the current method is that workers use handheld ultrasonic welding device to weld, but welding deviation, welding instability and other adverse problems often occur, so that the product cannot meet the waterproof and dustproof level of IP67, such as Figure 1 And Figure 2 As shown, annular rib is provided on the gas hole of the workpiece to be welded, the inventor found that, since the welding surface on the rib is curved surface, it is difficult for workers to press the breathable membrane and the welding surface of the rib well during welding operation, thereby affecting the quality of ultrasonic welding, in addition, when the pressure between the breathable membrane and the rib is insufficient, the welding effect of ultrasonic welding is also reduced. SUMMARY

[0003] Therefore, the utility model provides a kind of welding device for breathable membrane welding, to solve the problem of insufficient welding effect of breathable membrane.

[0004] The scheme provided by the utility model comprises:

[0005] A kind of welding device for breathable membrane welding, comprising:

[0006] Machine body;

[0007] Positioning bottom die, the positioning cavity for placing the workpiece to be welded is provided on the positioning bottom die, so that the gas hole of the workpiece to be welded is arranged upwards;

[0008] Welding assembly, the welding assembly includes heat-conducting base, welding head and electric heating core, the electric heating core is arranged in the heat-conducting base, the welding head is connected with the heat-conducting base, the bottom of the welding head is provided with hot pressing surface, and the profile of the hot pressing surface corresponds to the structure of the gas hole of the workpiece to be welded;

[0009] Lifting drive mechanism, the lifting drive mechanism includes servo electric cylinder, the servo electric cylinder is connected with the welding assembly, to drive the welding assembly to ascend and descend.

[0010] As a further optional solution, the welding assembly further comprises a first heat insulation plate and a second heat insulation plate, the first heat insulation plate and the second heat insulation plate are respectively arranged above and below the heat conduction base, a containing cavity containing the heat conduction base is formed between the first heat insulation plate and the second heat insulation plate, the containing cavity has a first side and a second side communicating with the outside world, the welding head is arranged at the first side of the containing cavity, and the second side of the containing cavity is used for wiring of the electric heating core.

[0011] As a further optional solution, the welding assembly further comprises a mounting plate, the first heat insulation plate is connected to the bottom of the mounting plate through bolts, and the first heat insulation plate, the heat conduction base and the second heat insulation plate are connected through bolts;

[0012] The output end of the servo cylinder is provided with a lifting plate, the bottom of the lifting plate is provided with a limiting column protruding downward, the mounting plate is arranged below the lifting plate through bolts, and the top of the mounting plate abuts against the bottom end of the limiting column, so that a heat insulation space is formed between the lifting plate and the mounting plate.

[0013] As a further optional solution, the limiting column is threadedly connected with the mounting plate, and the limiting column is a bolt.

[0014] As a further optional solution, the lifting driving mechanism further comprises a plurality of vertically arranged guide rods, one end of the guide rod is fixedly connected with the mounting plate, and the guide rod is slidingly connected with the machine body.

[0015] As a further optional solution, the machine body comprises a machine seat, the machine seat is provided with a protective cover and a machine box, the protective cover forms a channel open in front and back, the welding assembly and the positioning bottom die are arranged in the channel, the machine box is arranged at the rear of the channel, the machine box extends a cantilever portion to the direction of the channel, and the servo cylinder is arranged on the cantilever portion.

[0016] The first side of the containing cavity corresponds to the rear of the channel, and the second side of the containing cavity corresponds to the left side or the right side of the channel.

[0017] As a further optional solution, pressure blocks are arranged on both sides of the positioning bottom die.

[0018] The fixing mechanism is arranged on both sides of the positioning bottom die, and the fixing mechanism comprises a pressing plate, a first bolt is vertically arranged at a first end of the pressing plate, the first bolt is threadedly connected to the base, the pressing plate is in sliding connection with a threaded shank of the first bolt, a second end of the pressing plate is arranged above the pressure bearing block, a strip-shaped groove is arranged between the first end and the second end of the pressing plate, a second bolt is vertically arranged in the strip-shaped groove, the second bolt is threadedly connected to the base, and a nut of the second bolt is tightly arranged on the top of the pressing plate.

[0019] As a further optional solution, the cabinet is provided with an air guiding device, the cabinet is provided with an air inlet on one side corresponding to the channel, and the cabinet is provided with an air outlet on the top.

[0020] As a further optional solution, protective gratings are arranged on both sides in front of the channel.

[0021] Compared with the prior art, the welding device for welding the breathable film has at least the following beneficial effects:

[0022] The welding device provides the positioning bottom die to position the workpiece to be welded, so that the welding head of the welding assembly can be aligned with the air hole on the workpiece to be welded; the welding head has a hot pressing surface matched with the rib on the air hole, so that the breathable film can be in good contact with the rib on the air hole; the servo cylinder is used to drive the welding assembly to descend, the control accuracy of the servo cylinder is high, and the welding head and the workpiece to be welded can be in reliable contact, and appropriate welding stroke is provided. The welding effect between the workpiece to be welded and the breathable film is good, and the defective rate is low. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic view of an air hole structure of a workpiece to be welded in the prior art;

[0024] Figure 2 is a sectional view of a workpiece to be welded and a breathable film in the prior art;

[0025] Figure 3 is a structural schematic view of a welding device for welding a breathable film according to an embodiment of the present application;

[0026] Figure 4 is Figure 3 a structural schematic view of the welding device in the hidden part of the protective cover;

[0027] Figure 5 is a connection structure schematic view of the welding assembly and the lifting driving mechanism;

[0028] Figure 6 is an explosion schematic view of the welding assembly;

[0029] Figure 7 is the sectional view of the connecting structure of the welding assembly and the lifting driving mechanism;

[0030] Figure 8 is the structural schematic view of the positioning bottom die;

[0031] Figure 9 is the matching structural schematic view of the positioning bottom die and the fixing mechanism;

[0032] Figure 10 is the sectional view schematic view of the welding head and the workpiece to be welded.

[0033] In the figure: 100, workpiece to be welded; 110, air hole; 120, rib; 200, air permeable film; 1, machine body; 11, machine base; 12, protective cover; 121, channel; 13, machine box; 131, cantilever part; 132, air inlet; 133, air outlet; 14, protective grating;

[0034] 2, positioning bottom die; 21, positioning cavity; 22, pressure bearing block;

[0035] 3, welding assembly; 31, welding head; 311, hot pressing surface; 32, heat conducting base; 321, electric heating core; 33, first heat insulation plate; 34, second heat insulation plate; 35, mounting plate;

[0036] 4, lifting driving mechanism; 41, servo electric cylinder; 411, lifting plate; 412, limiting column; 42, guide rod;

[0037] 5, fixing mechanism; 51, pressing plate; 511, strip-shaped groove; 52, first bolt; 53, second bolt;

[0038] K, heat insulation space. DETAILED DESCRIPTION

[0039] The specific embodiments of the present application will be further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0040] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] refer to Figures 3-10 This utility model discloses a welding device for welding a breathable membrane 200, including a body 1, a positioning base mold 2, a welding assembly 3, and a lifting drive mechanism 4. The positioning base mold 2 is provided with a positioning cavity 21 for placing a workpiece 100 to be welded, so that the air holes 110 of the workpiece 100 to be welded face upwards. The welding assembly 3 includes a heat-conducting base 32, a welding head 31, and a heating element 321. The heating element 321 is disposed in the heat-conducting base 32. The welding head 31 is connected to the heat-conducting base 32. The bottom of the welding head 31 is provided with a hot-pressing surface 311. The outline of the hot-pressing surface 311 corresponds to the structure of the air holes 110 of the workpiece 100 to be welded. The lifting drive mechanism 4 includes a servo cylinder 41, which is connected to the welding assembly 3 to drive the welding assembly 3 to rise and fall.

[0044] The inner wall contour of the positioning cavity 21 corresponds to the structure of the workpiece 100 to be welded, so that the workpiece 100 can be placed stably, or even placed stably at an angle, so that the air hole 110 faces upward, or the rib 120 on the air hole 110 faces upward, for example. Figure 10 As shown. In this embodiment, as... Figure 10 As shown, the top surface of the rib 120 of the pore 110 is an arc surface, and the hot pressing surface 311 at the bottom of the welding head 31 is also correspondingly set as an arc surface, so that the permeable membrane 200 can be better pressed onto the top surface (welding surface) of the rib 120 during welding.

[0045] In use, the worker places the workpiece 100 to be welded in the positioning cavity 21 of the positioning die 2, then places the breathable film 200 above the ribs 120 of the gas holes 110 of the workpiece 100 to be welded, and finally starts the lifting driving mechanism 4 and the welding assembly 3 to work, the servo cylinder 41 drives the welding assembly 3 to descend, the hot pressing surface 311 of the welding head 31 tightly presses the breathable film 200 on the ribs 120 of the gas holes 110, after a certain time of hot pressing, the servo cylinder 41 drives the welding head 31 to rise, the worker takes out the welded workpiece, and then welds the next workpiece.

[0046] The welding device provides the positioning die 2 to position the workpiece 100 to be welded, ensures that the welding head 31 of the welding assembly 3 can be aligned with the gas holes 110 on the workpiece 100 to be welded, the hot pressing surface 311 on the welding head 31 matches the ribs 120 on the gas holes 110, and the breathable film 200 can be better pressed and contacted with the ribs 120 on the gas holes 110, the servo cylinder is used to drive the welding assembly 3 to descend, the control accuracy of the servo cylinder is high, can be accurately to 0.1 mm, realizes reliable contact of the welding head 31 and the workpiece 100 to be welded, and provides appropriate welding stroke. In this way, the welding effect between the workpiece 100 to be welded and the breathable film 200 is better, and the defective rate is lower.

[0047] In some embodiments, in order to avoid that the welding assembly 3 transmits heat to the servo cylinder 41, thereby affecting the control accuracy of the servo cylinder 41, as shown in Figures 5-7 The welding assembly 3 further comprises a first heat insulation plate 33 and a second heat insulation plate 34, the first heat insulation plate 33 and the second heat insulation plate 34 are arranged above and below the heat conduction base 32 respectively, a containing cavity (not marked in the figure) containing the heat conduction base 32 is formed between the first heat insulation plate 33 and the second heat insulation plate 34, the containing cavity has a first side and a second side communicating with the outside, the welding head 31 is arranged at the first side of the containing cavity, and the second side of the containing cavity is used for wiring of the electric heating core 321.

[0048] The heat conduction base 32 is wrapped by the first heat insulation plate 33 and the second heat insulation plate 34, so that heat loss of the heat conduction base 32 is avoided, and meanwhile heat transmission of the heat conduction base 32 to other structures is avoided. The first heat insulation plate 33 and the second heat insulation plate 34 are made of heat insulation materials, for example, mica resin heat insulation plates, and the heat conduction base 32 is made of heat conduction materials, for example, stainless steel plates.

[0049] In the embodiment, the worker should be at the opposite side of the first side of the containing cavity, that is, the worker cannot see the welding head 31 from the position of the worker, so that the worker will not touch the welding head 31 in the process of taking and placing the workpiece, and is prevented from being scalded by the welding head 31.

[0050] In order to further improve the heat insulation effect, as shown inFigures 5-7 As shown, the welding assembly 3 further comprises a mounting plate 35, the first heat insulation plate 33 is bolted to the bottom of the mounting plate 35, and the first heat insulation plate 33, the heat-conducting base 32 and the second heat insulation plate 34 are connected through bolt penetration; the output end of the servo cylinder 41 is provided with a lifting plate 41, the bottom of the lifting plate 41 is provided with a limiting column 412 protruding downward, the mounting plate 35 is arranged below the lifting plate 41 through bolts, and the top of the mounting plate 35 abuts against the bottom end of the limiting column 412, so as to form a heat insulation space K between the lifting plate 41 and the mounting plate 35. In this way, the heat transfer path between the welding assembly 3 and the servo cylinder 41 is further blocked by the heat insulation space K.

[0051] Preferably, the limiting column 412 is threadedly connected with the mounting plate 35, so that the limiting column 412 can be axially moved by rotating the limiting column 412, thereby adjusting the length of the limiting column 412 protruding from the bottom of the mounting plate 35, and further adjusting the size of the heat insulation space K.

[0052] In addition, for the convenience of manufacturing, the limiting column 412 adopts a bolt, which is easy to obtain and has a low cost.

[0053] In some embodiments, in order to improve the stability of the welding assembly 3 during lifting, as shown in Figure 3 or Figure 6 As shown, the lifting driving mechanism 4 further comprises a plurality of vertically arranged guide rods 42, one end of the guide rod 42 is fixedly connected with the mounting plate 35, and the guide rod 42 is slidingly connected with the machine body 1. In this way, the guide and limiting of the guide rod 42 are used to avoid the deviation of the welding assembly 3 during lifting, thereby improving the pressing accuracy of the welding head 31 and the gas hole 110.

[0054] In some embodiments, as shown in Figure 3 and Figure 4 As shown, the machine body 1 comprises a machine base 11, the machine base 11 is provided with a protective cover 12 and a machine box 13, the protective cover 12 forms a channel 121 open in front and back, the welding assembly 3 and the positioning bottom die 2 are arranged in the channel 121, the machine box 13 is arranged at the rear of the channel 121, the machine box 13 extends a cantilever part 131 to the direction of the channel 121, and the servo cylinder 41 is arranged on the cantilever part 131; the first side of the accommodating cavity corresponds to the rear of the channel 121, and the second side of the accommodating cavity corresponds to the left side or the right side of the channel 121.

[0055] The positioning mold 2 and welding components 3 are protected by the protective cover 12 to prevent external factors from affecting the welding process and to prevent the welding components 3 from causing harm to the workers. In this embodiment, the workers operate in front of the channel 121 and will not touch the welding head 31 or the heat-conducting base 32, thus avoiding burns.

[0056] Preferably, such as Figure 3 As shown, protective light gratings 14 are installed on both sides in front of the channel 121. The protective light gratings 14 detect whether the worker's hand has left the channel 121. If the worker's hand has not left the channel 121, the welding assembly 3 and the lifting drive mechanism 4 will not work, ensuring the worker's safety. In addition, the machine body 1 is equipped with a start button (not marked in the figure) and an emergency stop button (not marked in the figure). The welding device will only work after the worker triggers the start button; in case of an accident, the worker can trigger the emergency stop button to forcibly shut down the welding device.

[0057] In some embodiments, the workpiece 100 to be welded may have more than one model, such as Figure 9 As shown, the pore 110 structures on different models of workpieces 100 to be welded are the same, so the welding head 31 does not need to be replaced, but the positioning bottom mold 2 needs to be replaced accordingly. Therefore, in this embodiment, as Figure 8 and Figure 9 As shown, pressure blocks 22 are provided on both sides of the positioning bottom mold 2; a fixing mechanism 5 for pressing the positioning bottom mold 2 is provided on the machine base 11. The fixing mechanism 5 is provided on both sides of the positioning bottom mold 2. The fixing mechanism 5 includes a pressure plate 51. A first bolt 52 is vertically inserted through the first end of the pressure plate 51. The first bolt 52 is threaded to the machine base 11. The pressure plate 51 is slidably connected to the stud of the first bolt 52. The second end of the pressure plate 51 is pressed above the pressure block 22. A strip groove 511 is provided between the first end and the second end of the pressure plate 51. A second bolt 53 is vertically inserted through the strip groove 511. The second bolt 53 is threaded to the machine base 11. The nut of the second bolt 53 is pressed tightly against the top of the pressure plate 51.

[0058] In this embodiment, by loosening the second bolt 53, the pressure plate 51 can be released from its clamping and fixing of the bearing block 22. Then, the positioning mold 2 can be replaced. After replacing the positioning mold 2, the second bolt 53 is tightened again, so that the pressure plate 51 clamps the bearing block 22 again, thus fixing the positioning mold 2 and preventing it from shifting in position during subsequent welding work. In this embodiment, the operation of replacing the positioning mold 2 is simple.

[0059] In some embodiments, to improve welding efficiency, such as Figure 4As shown, the cabinet 13 is provided with an air guiding device (not shown), the cabinet 13 is provided with an air inlet 132 corresponding to one side of the channel 121, and the top of the cabinet 13 is provided with an air outlet 133. Wherein, the air guiding device is used for air guiding, the air enters the channel 121 from the front of the channel 121, and flows to the air outlet 133 through the air inlet 132, which can accelerate the cooling between the workpiece 100 to be welded and the breathable film 200, thereby improving the welding efficiency; wherein, the air guiding device adopts the prior art, so it is not described here.

[0060] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0061] The above is only the preferred embodiment of the present application, it should be pointed out that, for those skilled in the technical field, without departing from the technical principles of the present application, can make a number of improvements and substitutions, these improvements and substitutions should also be considered as the protection scope of the present application.

Claims

1. A welding device for welding a breathable film, characterized by, The device comprises: a machine body; a positioning base, which is provided with a positioning cavity for placing a workpiece to be welded, so that the air hole of the workpiece to be welded is arranged upwardly; a welding assembly, which comprises a heat-conducting base, a welding head and an electric heating core, the electric heating core being arranged in the heat-conducting base, the welding head being connected with the heat-conducting base, the bottom of the welding head being provided with a hot pressing surface, the profile of the hot pressing surface corresponding to the structure of the air hole of the workpiece to be welded; a lifting driving mechanism, which comprises a servo electric cylinder, the servo electric cylinder being connected with the welding assembly to drive the welding assembly to ascend and descend.

2. The welding device for welding a breathable film according to claim 1, wherein: the welding assembly further comprises a first heat insulation plate and a second heat insulation plate, the first heat insulation plate and the second heat insulation plate being arranged above and below the heat-conducting base respectively, a receiving cavity for accommodating the heat-conducting base being formed between the first heat insulation plate and the second heat insulation plate, the receiving cavity having a first side and a second side which are communicated with the outside, the welding head being arranged at the first side of the receiving cavity, and the second side of the receiving cavity being used for wiring of the electric heating core.

3. The welding device for welding a breathable film according to claim 2, wherein: the welding assembly further comprises a mounting plate, the first heat insulation plate being connected to the bottom of the mounting plate by means of bolts, and the first heat insulation plate, the heat-conducting base and the second heat insulation plate being connected by means of bolts; the output end of the servo electric cylinder is provided with a lifting plate, the bottom of the lifting plate being provided with a downwardly protruding limiting column, the mounting plate being arranged below the lifting plate by means of bolts, and the top of the mounting plate abutting against the bottom end of the limiting column, so that a heat insulation space is formed between the lifting plate and the mounting plate.

4. The welding device for welding a breathable film according to claim 3, wherein: the limiting column is threadedly connected with the mounting plate, and the limiting column is a bolt.

5. The welding device for welding a breathable film according to claim 3, wherein: the lifting driving mechanism further comprises a plurality of vertically arranged guide rods, one end of each of the guide rods being fixedly connected with the mounting plate, and the guide rods being slidingly connected with the machine body.

6. The welding device for welding a breathable film according to claim 2 or 3, wherein: the machine body comprises a machine base, the machine base being provided with a protective cover and a machine box, the protective cover forming a channel which is open in front and back, the welding assembly and the positioning base being arranged in the channel, the machine box being arranged at the rear of the channel, a cantilever portion of the machine box extending to the direction of the channel, and the servo electric cylinder being arranged on the cantilever portion; the first side of the receiving cavity corresponds to the rear of the channel, and the second side of the receiving cavity corresponds to the left side or the right side of the channel.

7. The welding device for welding a breathable film according to claim 6, wherein: pressure receiving blocks are arranged at both sides of the positioning base. The base is provided with a fixing mechanism for pressing the positioning bottom die, the fixing mechanism is arranged on both sides of the positioning bottom die, the fixing mechanism comprises a pressing plate, a first bolt is vertically arranged at a first end of the pressing plate, the first bolt is threadedly connected to the base, the pressing plate is in sliding connection with a threaded shank of the first bolt, a second end of the pressing plate is pressed above the pressure block, a strip-shaped groove is arranged between the first end and the second end of the pressing plate, a second bolt is vertically arranged in the strip-shaped groove, the second bolt is threadedly connected to the base, and a nut of the second bolt is pressed on a top of the pressing plate.

8. The welding device for welding a breathable film according to claim 6, wherein: The machine case is provided with an air guide device, an air inlet is formed on one side of the machine case corresponding to the channel, and an air outlet is arranged on the top of the machine case.

9. The welding device for welding a breathable film according to claim 6, wherein: Protective gratings are arranged on both sides in front of the channel.

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