Reflow soldering equipment and heating wire device thereof

Abstract

The utility model discloses reflow soldering equipment and a heating wire device thereof, and relates to the technical field of reflow soldering, and the heating wire device comprises a fixing frame and a three-phase heating wire assembly. The fixing frame comprises a fixing plate and a supporting structure, the supporting structure is detachably connected to the fixing plate, the three-phase heating wire assembly is installed on the supporting structure, one end of the three-phase heating wire assembly is fixed to the fixing plate and connected with the power line, and the other end of the three-phase heating wire assembly is fixed to the fixing plate and connected with the fixing plate through a conducting strip. Therefore, a three-phase star-shaped wiring structure is formed. The heating wire device adopts a three-phase star-shaped wiring structure, the current distribution of the wiring structure is more uniform, the voltage loss is effectively reduced, the service life of the heating wire structure is prolonged, meanwhile, the wiring circuit is shorter, and the cable cost is effectively saved; meanwhile, the fixing frame cancels a welding process, so that the assembly is simpler, the manufacturing difficulty is reduced, the time and the labor cost are effectively saved, and very high economic benefits are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of reflow soldering, and in particular to a heating wire device. The present application also relates to a reflow soldering device having the heating wire device. Background Art

[0002] At present, in hot air reflow soldering equipment, a heating wire structure is designed in the heating zone to meet the need for long-term high-temperature heating of the product.

[0003] In the existing system, the heating wire structure is mostly a single-phase heating wire structure. Since each customer's product process is different, the requirements for the furnace temperature curve of the reflow furnace are also inconsistent. Therefore, each reflow furnace equipment must adjust the heating parameters of the equipment accordingly according to different customers, different products, and different process requirements. After the furnace temperature parameters of the single-phase heating wire structure are adjusted, the current and voltage fluctuate greatly, which seriously affects the service life of the heating wire structure and the overall performance of the equipment, and increases the workload of after-sales maintenance. In addition, the fixed frames of the heating wire structures on the current market are mostly welded, which are difficult to produce, cumbersome to assemble, too difficult, and cumbersome to transfer materials.

[0004] Therefore, in view of the above situation, it is necessary for those skilled in the art to provide a heating wire device with stable current and voltage and easy assembly in a timely manner. Utility Model Content

[0005] The purpose of the present application is to provide a heating wire device, which has more uniform current distribution, can effectively improve the service life, and eliminates the welding process, making the assembly process simpler. Another purpose of the present application is to provide a reflow soldering device including the above heating wire device.

[0006] To achieve the above objectives, the present application provides a heating wire device, comprising:

[0007] A fixing frame, the fixing frame comprising a fixing plate and a supporting structure, wherein the supporting structure is detachably connected to the fixing plate;

[0008] A three-phase heating wire assembly is installed on a supporting structure, and one end of the three-phase heating wire assembly is fixed to a fixing plate and connected to a power line, and the other end of the three-phase heating wire assembly is fixed to a fixing plate and connected through a conductive sheet to form a three-phase star-shaped wiring structure.

[0009] In some embodiments, both ends of the three-phase heating wire assembly are connected with studs;

[0010] The fixing frame further includes a first insulating plate, a plurality of wiring terminals, a plurality of first insulating washers and a plurality of first fixing nuts. The fixing plate is provided with a plurality of fixing holes for fixing the wiring terminals. Each first insulating washer abuts between the fixing plate and the corresponding wiring terminal.

[0011] Each stud at one end of the three-phase heating wire assembly passes through the corresponding terminal, the corresponding first insulating washer, the fixing plate and the first insulating plate in sequence, and is connected to the power line through the corresponding first fixing nut;

[0012] Each stud at the other end of the three-phase heating wire assembly passes through the corresponding terminal, the corresponding first insulating washer, the fixing plate and the first insulating plate in sequence, and is connected to the conductive sheet through the corresponding first fixing nut.

[0013] In some embodiments, a protective component is installed at one end of any stud away from the three-phase heating wire assembly, and the protective component cover is arranged on the outside of the corresponding stud to protect the corresponding stud.

[0014] In some embodiments, any protection component includes:

[0015] A ceramic sheath, wherein the ceramic sheath ring is arranged on the outer circumference of the corresponding stud;

[0016] The ceramic end cover is connected to the end of the ceramic sleeve away from the fixing plate and is threadedly connected to the corresponding stud.

[0017] In some embodiments, each ceramic sheath is provided with an avoidance groove.

[0018] In some embodiments, the support structure comprises:

[0019] Fixed rod assembly;

[0020] A plurality of ceramic sheets, each of which is sleeved on the fixing rod assembly at intervals along the extension direction of the fixing rod assembly;

[0021] A plurality of ceramic retaining plates, each of which is sleeved on the fixed rod assembly at intervals along the extension direction of the fixed rod assembly;

[0022] Wherein, each ceramic sheet and each ceramic clamping plate is alternately and closely sleeved on the fixing rod assembly.

[0023] In some embodiments, a plurality of through holes are provided on any ceramic sheet for the three-phase heating wire assembly to pass through.

[0024] In some embodiments, the fixing frame further comprises:

[0025] A second insulating plate, the second insulating plate is sleeved on one end of the fixing rod assembly away from the fixing plate;

[0026] A second insulating washer, which is sleeved on an end of the fixing rod assembly away from the fixing plate and is located between the second insulating plate and the ceramic sheet close to the second insulating plate;

[0027] A second fixing nut, an end of the fixing rod assembly away from the fixing plate is fixed to the second insulating plate through the second fixing nut.

[0028] In some embodiments, one end of the fixing rod assembly away from the second insulating plate passes through the fixing plate and extends into the first insulating plate;

[0029] The fixing frame also includes a fixing screw, and one end of the fixing rod assembly away from the second insulating plate is fixed to the first insulating plate through the fixing screw.

[0030] The present application also provides a reflow soldering device, comprising any of the heating wire devices described above.

[0031] Compared with the above-mentioned background technology, the heating wire device provided in the embodiment of the present application includes a fixing frame and a three-phase heating wire assembly. Among them, the fixing frame includes a fixing plate and a supporting structure, the supporting structure is detachably connected to the fixing plate, the three-phase heating wire assembly is installed on the supporting structure, and one end of the three-phase heating wire assembly is insulated and fixed to the fixing plate and connected to the power line, and the other end of the three-phase heating wire assembly is insulated and fixed to the fixing plate and connected through a conductive sheet to form a three-phase star wiring structure. Compared with the traditional heating wire structure, the heating wire device provided in the embodiment of the present application, on the one hand, adopts a three-phase star wiring structure. The current distribution of this wiring structure is more uniform, which effectively reduces the voltage loss and increases the service life of the heating wire structure. At the same time, the wiring line is shorter, which effectively saves the cable cost; on the other hand, the fixing frame cancels the welding process, making the assembly easier, reducing the difficulty of production, effectively saving time and labor costs, and having high economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0033] Figure 1 An exploded view of the heating wire device in the embodiment of the present application;

[0034] Figure 2 A schematic diagram of a three-phase heating wire assembly in a heating wire device in an embodiment of the present application;

[0035] Figure 3 This is a schematic diagram of a fixing frame in a heating wire device in an embodiment of the present application;

[0036] Figure 4 This is a front view of the heating wire device in the embodiment of the present application;

[0037] Figure 5 A top view of the heating wire device in the embodiment of the present application;

[0038] Figure 6 It is a side view of the heating wire device in the embodiment of the present application.

[0039] in:

[0040] 1- three-phase heating wire assembly, 101- heating wire, 102- stud;

[0041] 2-fixed frame, 201-fixed plate, 202-support structure, 2021-fixed rod assembly, 2022-ceramic sheet, 20221-through hole, 2023-ceramic card plate, 203-first insulating plate, 204-connecting terminal, 205-first insulating washer, 206-first fixing nut, 207-protective assembly, 2071-ceramic sheath, 20711-avoidance groove, 2072-ceramic end cover, 208-second insulating plate, 209-second insulating washer, 2010-second fixing nut, 2011-fixing screw;

[0042] 3- Power cord;

[0043] 4- Conductive sheet. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0046] It should be noted that the directional words such as "upper end, lower end, left side, right side" described below are all defined based on the drawings in the specification.

[0047] Please refer to Figures 1 to 6 , Figure 1 An exploded view of the heating wire device in the embodiment of the present application; Figure 2 A schematic diagram of a three-phase heating wire assembly in a heating wire device in an embodiment of the present application; Figure 3 This is a schematic diagram of a fixing frame in a heating wire device in an embodiment of the present application; Figure 4 This is a front view of the heating wire device in the embodiment of the present application; Figure 5 A top view of the heating wire device in the embodiment of the present application; Figure 6It is a side view of the heating wire device in the embodiment of the present application.

[0048] The heating wire device provided in the embodiment of the present application includes a fixing frame 2 and a three-phase heating wire assembly 1 .

[0049] The fixing frame 2 is used to support and fix the three-phase heating wire assembly 1. The fixing frame 2 includes a fixing plate 201 and a supporting structure 202. The supporting structure 202 can be detachably connected to the fixing plate 201 by using detachable connecting parts (such as screws and bolts, etc.).

[0050] The three-phase heating wire assembly 1 is installed on the supporting structure 202, and one end of the three-phase heating wire assembly 1 is insulated and fixed to the fixing plate 201 and connected to the power line 3, and the other end of the three-phase heating wire assembly 1 is insulated and fixed to the fixing plate 201 and connected through the conductive sheet 4 to form a three-phase star wiring structure.

[0051] It should be noted that if Figure 1-3 As shown, the three-phase heating wire assembly 1 specifically includes three heating wires 101, which are installed side by side on the fixing frame 2, and each heating wire 101 has a U-shaped structure. In this way, the lower ends of the three heating wires 101 (i.e., one end of the above-mentioned three-phase heating wire assembly 1) are respectively connected to three cables, and the upper ends of the three heating wires 101 (i.e., the other end of the above-mentioned three-phase heating wire assembly 1) are connected together through the conductive sheet 4 to form a three-phase star connection structure (three-phase star connection is well known to those skilled in the art and will not be repeated here).

[0052] Compared with the traditional heating wire structure, the heating wire device provided in the embodiment of the present application, on the one hand, adopts a three-phase star wiring structure. The current distribution of this wiring structure is more uniform, which effectively reduces the voltage loss and increases the service life of the heating wire 101 structure. At the same time, the wiring line is shorter, which effectively saves the cable cost; on the other hand, the fixing frame 2 eliminates the welding process, making assembly easier, reducing the difficulty of production, effectively saving time and labor costs, and having high economic benefits.

[0053] In some embodiments, both ends of the three-phase heating wire assembly 1 are connected to studs 102, that is, both ends of the three heating wires 101 are connected to studs 102, and an electrical connection is formed between the studs 102 and the heating wires 101. Both ends of each heating wire 101 are tightly connected to the grooves provided at the heads of the two studs 102 by mechanical extrusion, and each stud 102 is fixed to the fixing frame 2 in an insulating fixing manner.

[0054] To this end, the heating wire device also includes a first insulating plate 203, a plurality of connecting terminals 204, a plurality of first insulating washers 205 and a plurality of first fixing nuts 206, wherein the number of connecting terminals 204, first insulating washers 205 and first fixing nuts 206 is the same as the number of studs 102, which are all six.

[0055] In order to facilitate the fixing of the connecting terminal 204, a plurality of fixing holes for fixing the connecting terminal 204 are provided on the fixing plate 201, wherein the connecting terminal 204 includes a square protrusion structure, and correspondingly, a square hole is provided on the fixing plate 201, and the size of the square hole is slightly larger than the square protrusion structure. During assembly, the square protrusion structure of the connecting terminal 204 extends into the square hole.

[0056] In order to facilitate the insulation contact between the connection terminal 204 and the fixing plate 201, a first insulating washer 205 is abutted between each connection terminal 204 and the fixing plate 201. The first insulating washer 205 is sleeved on the outside of the square protrusion structure of the connection terminal 204.

[0057] The first insulating plate 203 is fixed to the front side of the fixing plate 201 , and the connection terminals 204 and the first insulating washers 205 are fixed to the rear side of the fixing plate 201 .

[0058] Specifically, during assembly, each stud 102 at the lower end of the three heating wires 101 passes through the corresponding terminal 204, the corresponding first insulating washer 205, the fixing plate 201 and the first insulating plate 203 in sequence, and is connected to the power cord 3 through the corresponding first fixing nut 206; each stud 102 at the upper end of the three heating wires 101 passes through the corresponding terminal 204, the corresponding first insulating washer 205, the fixing plate 201 and the first insulating plate 203 in sequence, and is connected to the conductive sheet 4 through the corresponding first fixing nut 206.

[0059] That is, the three cables of the power cord 3 are respectively pressed and fixed to the studs 102 at the lower ends of the three heating wires 101 through the three first fixing nuts 206, and the conductive sheet 4 is respectively pressed and fixed to the studs 102 at the upper ends of the three heating wires 101 through the three first fixing nuts 206 to form a three-phase star connection mode to achieve three-phase balance.'

[0060] The above arrangement can not only meet the three-phase star connection requirements of the heating wire device, but also achieve the insulation and fixation of the two ends of the three-phase heating wire assembly 1 to the fixing plate 201.

[0061] In some embodiments, a protective component 207 is installed at one end of any stud 102 away from the three-phase heating wire assembly 1 , and the protective component 207 is covered on the outside of the corresponding stud 102 to protect the corresponding stud 102 .

[0062] In this embodiment, any protective assembly 207 includes a ceramic sheath 2071 and a ceramic end cap 2072. The ceramic sheath 2071 is disposed around the outer periphery of the corresponding stud 102, and the ceramic end cap 2072 is connected to the end of the ceramic sheath 2071 away from the fixing plate 201 and is threadedly connected to the corresponding stud 102.

[0063] In order to facilitate the threaded connection between the ceramic end cap 2072 and the corresponding stud 102 , the ceramic end cap 2072 is provided with an internal thread to achieve connection with the stud 102 at the end of the heating wire 101 .

[0064] In some embodiments, each ceramic sheath 2071 is provided with an avoidance groove 20711. Preferably, the avoidance groove 20711 may be a semicircular groove.

[0065] The avoidance grooves 20711 on the three ceramic sheaths 2071 at the upper ends of the three heating wires 101 are used to avoid the conductive sheet 4 , and the avoidance grooves 20711 on the three ceramic sheaths 2071 at the lower ends of the three heating wires 101 are used to avoid the power line 3 .

[0066] In order to facilitate supporting the three-phase heating wire assembly 1, the support structure 202 includes a fixed rod assembly 2021, a plurality of ceramic sheets 2022, and a plurality of ceramic retaining plates 2023. The fixed rod assembly 2021 includes two fixed rods arranged in parallel, each ceramic sheet 2022 is sleeved on the two fixed rods at intervals along the extension direction of the two fixed rods, each ceramic retaining plate 2023 is sleeved on the two fixed rods at intervals along the extension direction of the two fixed rods, and each ceramic sheet 2022 and each ceramic retaining plate 2023 are sleeved on the fixed rod assembly 2021 alternately and closely.

[0067] Of course, according to actual needs, the number of ceramic clamping plates 2023 and ceramic sheets 2022 on the two fixing rods is nine. In other words, the two fixing rods are successively arranged with ceramic clamping plates 2023, ceramic sheets 2022, ceramic clamping plates 2023, ceramic sheets 2022, ceramic clamping plates 2023, ceramic sheets 2022, ceramic clamping plates 2023, ceramic sheets 2022, ceramic clamping plates 2023, ceramic sheets 2022, ceramic clamping plates 2023, ceramic sheets 2022, ceramic clamping plates 2023, ceramic sheets 2022, ceramic clamping plates 2023, ceramic sheets 2022, ceramic clamping plates 2023, and ceramic sheets 2022 in the direction away from the fixed plate 201.

[0068] Any ceramic sheet 2022 is provided with six through holes 20221 for the three-phase heating wire assembly 1 to pass through. It should be noted that the three heating wires 101 in a U-shaped structure bypass the outer end surface of the ceramic sheet 2022 farthest from the fixing plate 201 .

[0069] In some embodiments, the heating wire device also includes a second insulating plate 208, a second insulating washer 209 and a second fixing nut 2010, wherein the number of the second insulating washers 209 and the second fixing nuts 2010 are both two, the second insulating plate 208 is sleeved on the end of the fixing rod assembly 2021 away from the fixing plate 201; the two second insulating washers 209 are respectively sleeved on the ends of the two fixing rods away from the fixing plate 201, and each second insulating washer 209 is located between the second insulating plate 208 and the ceramic sheet 2022 close to the second insulating plate 208; the end of the fixing rod assembly 2021 away from the fixing plate 201 is fixed to the second insulating plate 208 by the second fixing nut 2010.

[0070] It can be understood that the ceramic plates 2022, ceramic positioning plates 2023 and second insulating washers 209 of the support structure 202 are sleeved on the fixed rod assembly 2021, and are threadedly locked with the end of the fixed rod assembly 2021 away from the fixed plate 201 through the second fixing nut 2010 to fix the fixed rod assembly 2021 to the second insulating plate 208.

[0071] In some embodiments, one end of the fixing rod assembly 2021 away from the second insulating plate 208 passes through the fixing plate 201 and extends into the first insulating plate 203 .

[0072] In addition, the heating wire device further includes a fixing screw 2011 , and one end of the fixing rod assembly 2021 away from the second insulating plate 208 is fixed to the first insulating plate 203 by the fixing screw 2011 .

[0073] Similarly, one end of the fixing rod assembly 2021 away from the second insulating plate 208 is thread-lockedly connected to the fixing screw 2011 to be fixed to the second insulating plate 208 .

[0074] By adopting the above arrangement, the support structure 202 can be detachably fixed to the fixing plate 201 and the two insulating plates.

[0075] In summary, the heating wire device provided in the embodiment of the present application adopts a new three-phase heating wire 101 structure, which can very effectively extend the life of the heating wire 101 structure. No welding process is required during the entire production process, which reduces the difficulty of production and saves material shipping time and labor costs. Compared with the traditional single heating module that requires two heating wire 101 structures, the single heating module of this new three-phase heating wire 101 structure only requires one heating wire 101 structure, which reduces the difficulty of assembly, the heat is more concentrated, and the heating rate is faster. This can make the reflow soldering equipment more competitive and create more economic benefits.

[0076] A reflow soldering device provided in the present application includes the heating wire device described in the above specific embodiment; other parts of the reflow soldering device can refer to the prior art and will not be elaborated in this article.

[0077] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0078] The above is a detailed introduction to the reflow soldering equipment and heating wire device provided by the present application. This article uses specific examples to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the scheme of the present application and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A heating wire device, characterized in that: include: A fixing frame, the fixing frame comprising a fixing plate and a supporting structure, the supporting structure being detachably connected to the fixing plate; A three-phase heating wire assembly is installed on the supporting structure, and one end of the three-phase heating wire assembly is fixed to the fixing plate and connected to the power line, and the other end of the three-phase heating wire assembly is fixed to the fixing plate and connected through a conductive sheet to form a three-phase star wiring structure.

2. The heating wire device according to claim 1, characterized in that: Both ends of the three-phase heating wire assembly are connected with studs; The fixing frame further comprises a first insulating plate, a plurality of wiring terminals, a plurality of first insulating washers and a plurality of first fixing nuts, the fixing plate is provided with a plurality of fixing holes for fixing the wiring terminals, and each of the first insulating washers abuts between the fixing plate and the corresponding wiring terminal; Each of the studs at one end of the three-phase heating wire assembly passes through the corresponding wiring terminal, the corresponding first insulating washer, the fixing plate and the first insulating plate in sequence, and is connected to the power line through the corresponding first fixing nut; Each of the studs at the other end of the three-phase heating wire assembly passes through the corresponding terminal, the corresponding first insulating washer, the fixing plate and the first insulating plate in sequence, and is connected to the conductive sheet through the corresponding first fixing nut.

3. The heating wire device according to claim 2, characterized in that: A protective component is installed at one end of any of the studs away from the three-phase heating wire component, and the protective component cover is arranged on the outside of the corresponding stud to protect the corresponding stud.

4. The heating wire device according to claim 3, characterized in that: Any of the protection components comprises: A ceramic sheath, wherein the ceramic sheath is arranged around the outer periphery of the corresponding stud; A ceramic end cover is connected to an end of the ceramic sleeve away from the fixing plate and is threadedly connected to the corresponding stud.

5. The heating wire device according to claim 4, characterized in that: Each of the ceramic sheaths is provided with an avoidance groove.

6. The heating wire device according to any one of claims 2 to 5, characterized in that: The support structure comprises: Fixed rod assembly; A plurality of ceramic sheets, each of which is sleeved on the fixing rod assembly at intervals along the extension direction of the fixing rod assembly; A plurality of ceramic retaining plates, each of which is sleeved on the fixing rod assembly at intervals along the extension direction of the fixing rod assembly; Wherein, each of the ceramic sheets and each of the ceramic clamping plates are alternately and closely sleeved on the fixing rod assembly.

7. The heating wire device according to claim 6, characterized in that: Any of the ceramic sheets is provided with a plurality of through holes for the three-phase heating wire assembly to pass through.

8. The heating wire device according to claim 6, characterized in that: The fixing frame also includes: A second insulating plate, wherein the second insulating plate is sleeved on an end of the fixing rod assembly away from the fixing plate; A second insulating washer, which is sleeved on an end of the fixing rod assembly away from the fixing plate and is located between the second insulating plate and the ceramic sheet close to the second insulating plate; A second fixing nut, an end of the fixing rod assembly away from the fixing plate is fixed to the second insulating plate through the second fixing nut.

9. The heating wire device according to claim 8, characterized in that: One end of the fixing rod assembly away from the second insulating plate passes through the fixing plate and extends into the first insulating plate; The fixing frame further includes a fixing screw, and one end of the fixing rod assembly away from the second insulating plate is fixed to the first insulating plate by the fixing screw.

10. A reflow soldering device, characterized in that: It comprises a heating wire device as described in any one of claims 1 to 9.

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