CN218868455U

CN218868455U - Furnace-passing jig

Info

Publication number: CN218868455U
Application number: CN202222677684.1U
Authority: CN
Inventors: 李鹏; 汤恒立; 张江华
Original assignee: Jiangsu Changjiang Electronics Technology Co Ltd
Current assignee: JCET Group Co Ltd
Priority date: 2022-10-11
Filing date: 2022-10-11
Publication date: 2023-04-14
Anticipated expiration: 2032-10-11

Abstract

The utility model provides a furnace-passing jig, which comprises a jig body, wherein a containing cavity for placing a single PCB is concavely arranged on the jig body; the furnace-passing jig also comprises at least one group of fixing components which are connected to the jig body and used for fixing the PCB, each group of fixing components comprises at least two fixing pieces which are respectively arranged at two opposite sides in the accommodating cavity, and the distance between the fixing pieces at different sides in each group of fixing components is adjustable; the furnace-passing jig can be used for the SMT production process of a single PCB, and can meet the application scene of product development; simultaneously, can be according to the size of PCB board adjustment every group lie in the fixed subassembly in the distance between the mounting of the different sides, the reinforcing cross stove tool's commonality, and can reduction in production cost.

Description

Furnace-passing jig

Technical Field

The utility model relates to a tool field especially relates to a cross stove tool.

Background

As is known, the main process steps of the SMT (surface mount technology) production process of a PCB (Printed Circuit Board) include step 1: printing solder paste; step 2: automatic pasting; and 3, step 3: reflow soldering, step 4: cleaning; the fifth step: and demolding, detecting and the like. In the SMT process, a furnace-passing jig is generally required to be used for supporting and fixing the PCB so as to prevent the PCB from warping and deforming in the furnace-passing process; meanwhile, the furnace-passing jig can protect the plug-in components welded on the PCB, so that the plug-in components attached to the PCB through reflow soldering cannot be damaged by high temperature during furnace passing.

In the traditional SMT production process, the furnace-passing jigs are all a whole printing process, the SMT production process of single PCB in the product research and development process cannot be met, and the furnace-passing jigs are single in structure and poor in universality.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a cross stove tool is applicable to the SMT production technology of single PCB board, and the commonality is stronger.

In order to realize the purpose of the utility model, the utility model provides a furnace-passing jig, which comprises a jig body; the jig body is concavely provided with an accommodating cavity for accommodating a single PCB; the furnace-passing jig further comprises at least one group of fixing assemblies connected to the jig body and used for fixing the PCB, each group of fixing assemblies comprises at least two fixing pieces respectively arranged on two opposite sides in the accommodating cavity, and the distance between the fixing pieces on different sides in each group of fixing assemblies is adjustable.

As a further improved technical solution of the present invention, each group of the fixing members includes a separate portion disposed in the chamber for accommodating two of the opposite sides of the chamber the fixing member, two the fixing member is disposed relatively.

As a further improved technical scheme of the utility model, mounting threaded connection in on the tool body, just the one end projection of mounting extremely hold the intracavity.

As a further improved technical scheme of the utility model, the jig body comprises a base station and an annular wall convexly arranged on the base station, and the annular wall is surrounded to form the accommodating cavity; the annular wall is provided with a threaded hole which penetrates through the annular wall in the thickness direction, and the fixing piece is in threaded connection with the threaded hole.

As a further improved technical scheme of the utility model, the bottom of tool body run through be equipped with hold a plurality of through-holes that the chamber is linked together.

As the utility model discloses further modified technical scheme, the bottom of tool body is run through and is equipped with the hole of stepping down, the hole of stepping down is located on the tool body and treat the corresponding position department of plug-in element on the single PCB board of placing.

As a further improved technical scheme of the utility model, the jig body is provided with at least two fixing pins for fixing the steel mesh; the at least two fixing pins are respectively arranged on the periphery of the accommodating cavity.

As a further improved technical scheme of the utility model, the jig body is provided with two fixing pins; the two fixing pins are arranged at the opposite angles of the jig body.

As a further improved technical scheme of the utility model, the jig body comprises a base station and an annular wall convexly arranged on the base station, and the annular wall is surrounded to form the accommodating cavity; the fixed pin is arranged on the base station and is positioned on the periphery of the annular wall.

As the utility model discloses further modified technical scheme, the base station with annular wall an organic whole sets up.

The beneficial effects of the utility model are that: the furnace-passing jig in the utility model can be used for SMT production process of single PCB board by arranging the accommodating cavity for placing the single PCB board, thereby meeting the application scene of product development; simultaneously, the distance that lies in between the mounting of different sides in the fixed subassembly is adjustable, can be according to the size of PCB board regulation every group the distance that lies in between the mounting of different sides in the fixed subassembly strengthens the commonality of crossing stove tool, and can reduction in production cost.

Drawings

Fig. 1 is a top view of a first furnace-passing jig according to an embodiment of the present invention;

FIG. 2 isbase:Sub>A sectional view taken along line A-A of FIG. 1;

fig. 3 is a top view of a second furnace-passing jig according to an embodiment of the present invention;

FIG. 4 is a sectional view taken along line B-B of FIG. 3;

fig. 5 (a) -5 (h) are the SMT production process steps of the double-sided printed circuit board using the furnace jig according to an embodiment of the present invention.

Detailed Description

The present invention will be described in detail with reference to the embodiments shown in the drawings, and reference is made to fig. 1 to 5 for illustrating the preferred embodiments of the present invention, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. It should be noted that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that the equivalent transformation or substitution of the function, method, or structure based on these embodiments is within the protection scope of the present invention.

Meanwhile, the drawings adopt a very simplified form and use non-precise proportions, and are only used for conveniently and clearly assisting in explaining various implementation modes in the utility model.

It is to be understood that the term "coupled", unless otherwise expressly specified or limited, is intended to be inclusive, e.g., such that a connection may be direct or indirect via intermediate media, either fixed or movable, or alternatively detachable or integral. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Please refer to fig. 1-4, which illustrate a furnace-passing jig according to an embodiment of the present invention. In this embodiment, the PCB 10 is a double-sided printed circuit board, that is, the two sides of the PCB 10 are required to be mounted with plug elements, so that a larger design space can be provided for designers, and the designers can design small and compact low-cost products more easily.

It can be known that, when the PCB 10 is a double-sided printed circuit board, two furnace passing jigs, namely, the first furnace passing jig 1 shown in fig. 1-2 and the second furnace passing jig 2 shown in fig. 3-4, need to be used in the SMT process of the PCB 10. The PCB 10 is fixed through the first furnace passing jig 1, then the inserting elements are welded on one side of the PCB 10, then the PCB 10 with the inserting elements attached to one side is fixed through the second furnace passing jig 2, and the inserting elements are welded on the other side of the PCB 10.

Of course, it can be understood that when the PCB 10 is a single-sided printed PCB 10, the first furnace jig 1 may be used.

Referring to fig. 1-2, the first furnace jig 1 includes a jig body 11, and the jig body 11 may be made of aluminum alloy or synthetic stone and may be used for multiple times.

The jig body 11 is concavely provided with an accommodating cavity 111 for accommodating a single PCB 10, so that the first furnace-passing jig 1 can be used for the SMT production process of the single PCB 10, and the application scene of product development can be met.

The first furnace jig 1 further comprises at least one group of fixing components connected to the jig body 11 and used for fixing the PCB 10, and after the single PCB 10 is placed in the accommodating cavity 111, the PCB 10 is fixed in the accommodating cavity 111 through the fixing components, so that the positioning of the PCB 10 is realized.

Each set of the fixing components includes at least two fixing members 12 respectively disposed at two opposite sides in the accommodating cavity 111. That is, the fixing members 12 in each set of the fixing assemblies fix the PCB 10 from opposite sides of the PCB 10, thereby enhancing the stability of fixing the PCB 10.

Further, the distance between the fixing pieces 12 on different sides in each group of fixing assemblies is adjustable, and the distance between the fixing pieces 12 on different sides in each group of fixing assemblies can be adjusted according to the size of the PCB 10. Namely, the first furnace-passing jig 1 is suitable for fixing the PCB 10 with different sizes, so that the universality of the first furnace-passing jig 1 is enhanced, and the production cost can be reduced.

In this embodiment, the first furnace-passing jig 1 only includes a set of the fixing assemblies, and the fixing assemblies include two fixing members 12, and the two fixing members 12 are respectively disposed on two opposite sides of the accommodating cavity 111 and are oppositely disposed to fix a single PCB 10 and simplify the installation and detachment of the PCB 10. Certainly, without being limited thereto, in other embodiments, each set of the fixing components may include three or more fixing pieces 12, and the first furnace jig 1 may also include two sets of the fixing components to fix the PCB 10 from the circumferential direction of the PCB 10.

In one embodiment shown in fig. 1-2, the fixing element 12 is screwed to the fixture body 11, and one end of the fixing element 12 protrudes into the accommodating cavity 111. By rotating the fixing member 12, the length of the fixing member 12 protruding into the accommodating cavity 111 can be adjusted, so as to adjust the distance between the fixing members 12 located at opposite sides, and when one end of the fixing member 12 located in the accommodating cavity 111 abuts against the end surface of the PCB 10, the PCB 10 is fixed in the accommodating cavity 111. Namely, through rotating mounting 12, can be promptly according to being located the size of the PCB board 10 that holds the chamber 111 is fixed PCB board 10, correspondingly, through rotating mounting 12, can take out PCB board 10, the dismouting is convenient, shortens product development cycle, promotes and produces line operating efficiency. Of course, the fixing element 12 may be movably connected to the jig body 11 along the transverse direction in other embodiments, and the connection manner and the connection structure between the fixing element 12 and the jig body 11 may be as long as the distance between the fixing elements 12 located on the opposite sides can be adjusted and the PCB board 10 can be fixed.

Specifically, the jig body 11 includes a base 112 and an annular wall 113 protruding from the base 112, and the annular wall 113 surrounds the accommodating cavity 111. The annular wall 113 is provided with a threaded hole 1131 penetrating along the thickness direction of the annular wall 113, and the fixing member 12 is screwed into the threaded hole 1131. Therefore, the fixing member 12 can be turned by a tool from the outside of the annular wall 113 to adjust the length of the fixing member 12 protruding into the accommodating cavity 111, thereby facilitating the assembly and disassembly of the PCB 10.

Further, the base 112 and the annular wall 113 are integrally disposed, so as to enhance the stability of the first furnace passing jig 1.

Further, a plurality of through holes 114 communicated with the accommodating cavity 111 are formed at the bottom of the jig body 11 in a penetrating manner. The first furnace-passing jig 1 fixed with the PCB 10 is convenient for heat conduction during reflow soldering, so that the heat conduction is uniform and consistent; meanwhile, during subsequent cleaning, the through holes 114 facilitate permeation of the chemical cleaning agent used for cleaning, thereby enhancing the cleaning effect.

Preferably, the through holes 114 are uniformly distributed on the lower side of the accommodating cavity 111.

Further, the jig body 11 is provided with at least two fixing pins 13 for fixing the steel net 50, and the at least two fixing pins 13 are respectively disposed on the periphery of the accommodating cavity 111. After the PCB 10 is fixed in the accommodating cavity 111, the fixing pin 13 fixes the steel mesh 50 on the first furnace jig 1, so that the steel mesh 50 presses on the PCB 10, thereby facilitating the subsequent solder paste printing.

In one embodiment, the jig body 11 is provided with two fixing pins 13; the two fixing pins 13 are disposed at opposite corners of the jig body 11. The positioning and fixing of the steel net 50 can be realized, and the cost can be saved.

Specifically, the two fixing pins 13 are disposed on the base 112 located on the outer periphery of the annular wall 113 and located at opposite corners of the base 112, but not limited thereto.

Referring to fig. 3-4, in order to provide the second furnace-passing jig 2 of the present invention, the second furnace-passing jig 2 is different from the first furnace-passing jig 1 only in that: the bottom of the jig body 11 is provided with a hole 115 for stepping through, and the hole 115 for stepping through is arranged at a position on the jig body 11 corresponding to the plug-in element on the single PCB 10 to be placed. After the PCB 10 welded with the plug connector on one side is fixed on the second furnace passing jig 2, the plug connector element is located in the abdicating hole 115, and the welded plug connector element can be protected from the influence of subsequent process high temperature.

The second furnace-passing jig 2 is identical to the first furnace-passing jig 1 except for the above differences, and further description of other structures of the second furnace-passing jig 2 is omitted here.

With reference to fig. 5 (a) -5 (h), the SMT production process of the double-sided printed circuit board (PCB 10) using the oven jig of the present invention is as follows:

as shown in fig. 5 (a), a first furnace-passing jig 1 is provided;

as shown in fig. 5 (b), placing the PCB 10 in the accommodating cavity 111 of the first furnace jig 1, and fixing the PCB 10 by rotating the fixing member 12 according to the size of the PCB 10, wherein a first side of the PCB 10 is exposed upwards;

as shown in fig. 5 (c), fixing a steel mesh 50 on the first furnace-passing jig 1 by a fixing pin 13, pressing the steel mesh 50 on the first side of the PCB 10, then printing the solder paste 40, and printing the solder paste 40 on the corresponding PCB pad on the first side through the steel mesh 50;

as shown in fig. 5 (d), the steel net 50 is removed, and the first plug element 20 is soldered to the first side of the PCB board 10 by the SMT solder paste soldering process through the principle of heating up and down in the wave soldering reflow oven;

and then after a cleaning procedure, removing the first furnace-passing jig 1 to obtain the PCB 10 welded with the first plug-in element 20 on the first side.

As shown in fig. 5 (e), providing the second furnace-passing jig 2;

as shown in fig. 5 (f), the PCB 10 with the first plug element 20 welded on the first side is placed in the accommodating cavity 111 of the second furnace-passing jig 2, and the PCB 10 is fixed by rotating the fixing member 12 according to the size of the PCB 10, at this time, the second side of the PCB 10 opposite to the first side is exposed upwards, and the first plug element 20 is located in the receding hole 115;

as shown in fig. 5 (g), fixing a steel mesh 50 on the second furnace-passing jig 2 by a fixing pin 13, pressing the steel mesh 50 on the second side of the PCB 10, then printing the solder paste 40, and printing the solder paste 40 on the PCB pad of the corresponding second side through the steel mesh 50;

as shown in fig. 5 (h), the steel net 50 is removed, and the second plug element 30 is soldered to the second side of the PCB board 10 by the SMT solder paste soldering process through the principle of heating up and down in the wave soldering reflow oven;

and then after a cleaning procedure, removing the second furnace passing jig 2 to obtain the PCB 10 with the first side and the second volume both welded with the plug-in elements.

Compared with the prior art, the furnace-passing jig in the utility model can be used in the SMT production process of a single PCB 10 by arranging the accommodating cavity 111 for accommodating the single PCB 10, and can meet the application scene of product development; meanwhile, the distance between the fixing pieces 12 on different sides in the fixing assemblies is adjustable, the distance between the fixing pieces 12 on different sides in each group of fixing assemblies can be adjusted according to the size of the PCB 10, the universality of the furnace passing jig is enhanced, and the production cost can be reduced.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A furnace-passing jig comprises a jig body; the method is characterized in that: the jig body is concavely provided with an accommodating cavity for placing a single PCB; the furnace-passing jig further comprises at least one group of fixing assemblies connected to the jig body and used for fixing the PCB, each group of fixing assemblies comprises at least two fixing pieces respectively arranged on two opposite sides in the containing cavity, and the distance between the fixing pieces on different sides in each group of fixing assemblies is adjustable.

2. The furnace jig of claim 1, wherein: every group fixed subassembly is including locating separately two of the relative both sides in the holding cavity the mounting, two the mounting sets up relatively.

3. The furnace jig of claim 1, wherein: the fixing piece is connected to the jig body in a threaded mode, and one end of the fixing piece protrudes into the accommodating cavity.

4. The jig for passing furnace according to claim 3, wherein: the jig body comprises a base station and an annular wall convexly arranged on the base station, and the annular wall is enclosed to form the accommodating cavity; the annular wall is provided with a threaded hole which penetrates through the annular wall in the thickness direction, and the fixing piece is in threaded connection with the threaded hole.

5. The furnace jig of claim 1, wherein: the bottom of the jig body is provided with a plurality of through holes communicated with the containing cavity in a penetrating manner.

6. The furnace jig of claim 1, wherein: the jig is characterized in that a yielding hole is formed in the bottom of the jig body in a penetrating mode, and the yielding hole is formed in the position, corresponding to the inserting element on the single PCB to be placed, of the jig body.

7. The furnace jig of claim 1, wherein: the jig body is provided with at least two fixing pins for fixing a steel mesh; the at least two fixing pins are respectively arranged on the periphery of the accommodating cavity.

8. The furnace jig of claim 7, wherein: the jig body is provided with two fixing pins; the two fixing pins are arranged at the opposite angles of the jig body.

9. The furnace jig of claim 7, wherein: the jig body comprises a base station and an annular wall convexly arranged on the base station, and the annular wall is enclosed to form the accommodating cavity; the fixed pin is arranged on the base station and is positioned on the periphery of the annular wall.

10. The jig for passing furnace according to claim 4, wherein: the abutment is integral with the annular wall.