阅读说明：本技术 一种用于回流焊接的元件防偏移装置 (Component deviation prevention device for reflow soldering ) 是由 黄利志 余辰将 张鲲 舒军 于 2021-08-11 设计创作，主要内容包括：本发明公开了一种用于回流焊接的元件防偏移装置,包括：衬板,其顶面上设有用于焊接元件的元件安装位,所述元件安装位的外侧上设有限位孔；限位件,安装在所述衬板上,所述限位件的底面上设有与所述限位孔相适配的限位凸部；所述限位件包括连接为一体的横向限位臂和纵向限位臂,所述横向限位臂与所述纵向限位臂围成的角部的内侧朝向元件设置。本发明,通过安装在衬板上的限位件对元件形成竖直方向和水平方向两个方向上的限位作用,可有效防止粘贴在衬板上的元件因受力不平衡而发生的角度的偏转,从而避免产生废板等问题,提高产品品质。(The invention discloses an element deviation preventing device for reflow soldering, which comprises: the top surface of the lining plate is provided with an element mounting position for welding elements, and the outer side of the element mounting position is provided with a limiting hole; the limiting piece is arranged on the lining plate, and a limiting convex part matched with the limiting hole is arranged on the bottom surface of the limiting piece; the limiting part comprises a transverse limiting arm and a longitudinal limiting arm which are connected into a whole, and the inner side of a corner part enclosed by the transverse limiting arm and the longitudinal limiting arm is arranged towards an element. According to the invention, the limiting parts arranged on the lining plate can limit the elements in the vertical direction and the horizontal direction, so that the elements adhered on the lining plate can be effectively prevented from deflecting in angle due to unbalanced stress, the problems of waste plates and the like are avoided, and the product quality is improved.)

1. A component displacement prevention apparatus for reflow soldering, comprising:

the top surface of the lining plate is provided with an element mounting position for welding elements, and the outer side of the element mounting position is provided with a limiting hole;

the limiting piece is arranged on the lining plate, and a limiting convex part matched with the limiting hole is arranged on the bottom surface of the limiting piece; the limiting part comprises a transverse limiting arm and a longitudinal limiting arm which are connected into a whole, and the inner side of a corner part enclosed by the transverse limiting arm and the longitudinal limiting arm is arranged towards an element.

2. The component displacement preventing device for reflow soldering of claim 1, wherein the longitudinal check arm has a length smaller than the transverse check arm.

3. The component displacement preventing device for reflow soldering of claim 2, wherein the position-limiting protrusions are provided on the lateral position-limiting arms, and the number of the position-limiting protrusions is two, and the two position-limiting protrusions are provided on the free ends of the lateral position-limiting arms and the connecting ends of the lateral position-limiting arms and the longitudinal position-limiting arms, respectively.

4. The component deviation preventing device for reflow soldering of claim 3, wherein the position-limiting protrusion comprises a positioning pin and a position-limiting pin, the positioning pin is cylindrical and is arranged on the connecting end of the transverse position-limiting arm and the longitudinal position-limiting arm; the limiting pin is prismatic and is arranged at the free end of the transverse limiting arm.

5. The component deviation preventing device for reflow soldering of claim 4, wherein the stopper pin and the positioning pin are provided with chamfers on bottom surfaces thereof.

6. The component deviation preventing device for reflow soldering of claim 5, wherein the chamfer of the positioning pin is 35 ° and the chamfer of the stopper pin is 30 °.

7. The component displacement preventing device for reflow soldering of claim 1, wherein the lateral and longitudinal position-limiting arms are provided with position-limiting protrusions on their sides, the protrusions being provided on the sides of the lateral and longitudinal position-limiting arms facing the component.

8. The component displacement preventing device for reflow soldering of claim 7, wherein the lateral position-limiting arm is further provided with an intermediate component position-limiting projection for limiting a component disposed in the middle when a plurality of components are disposed side by side in the component mounting position.

9. The component displacement preventing device for reflow soldering of claim 1, wherein the free ends of the lateral and longitudinal check arms are provided with rounded corners.

10. The component deviation preventing device for reflow soldering of claim 1, wherein the position limiting members comprise a first position limiting member and a second position limiting member, the first position limiting member is used to be disposed at the upper left corner and the lower right corner of the component, the transverse position limiting arm is disposed at the right end of the longitudinal position limiting arm;

the second limiting piece is used for being arranged at the left lower corner and the right upper corner of the element, and the transverse limiting arm of the second limiting piece is arranged at the left end of the longitudinal limiting arm of the second limiting piece.

Technical Field

The invention relates to the technical field of reflow soldering, in particular to an element deviation prevention device for reflow soldering.

Background

The reflow soldering process is commonly applied to the field of electronic manufacturing, and components on various clamping plates used in electronic products such as computers and the like are all soldered on a circuit board through the process. The reflow soldering device is internally provided with a heating circuit, and after air or nitrogen is heated to a high enough temperature, the air or nitrogen is blown to a circuit board pasted with the element, so that solder on two sides of the element is melted and then is bonded with the mainboard. In the actual production process, the surface tension of the solder can cause the offset of the lining plate under the melting state, although the lining plate is provided with a solder mask for assisting the welding, the barrier layer can only be used for displaying the correct welding position of the element on the lining plate, the angular offset of the element cannot be limited, and the excessive angular offset can influence the subsequent process operation, so that the product is scrapped.

For this reason, chinese utility model patent CN204377328U provides a stove tool is crossed to pressure for reflow soldering, including loading board and the part of exerting pressure, the loading board four corners is provided with adapting unit, be equipped with spacing part on the adapting unit, the part of exerting pressure sets up on spacing part, provides suitable pressure at the reflow soldering in-process through the part of exerting pressure to the component on the loading board to guarantee the stability of welding effect, improved the quality of product to a certain extent.

However, the above solution has the following disadvantages:

(1) the pressing part provides vertical pressure to the element on the plate, so that the problem of tombstoning caused by unbalanced wetting force at two ends of the element and unbalanced moment at two ends of the element can be solved, and the problems of angular deviation and the like of the element in the reflow soldering process cannot be effectively solved;

(2) when the pressing component is installed, the problems of displacement, IC pin deformation and the like of the component after the component and the soldering paste are pressed due to overlarge pressure can exist, and the quality of a finished product of a circuit board is influenced;

(3) the pressing part provides pressure for a plurality of elements on the plate at the same time, and the connecting parts are arranged at the four corners of the bearing plate, so that the elements far away from the connecting parts are likely to be subjected to small pressure and generate deviation.

In view of this, it is desirable to improve the conventional reflow soldering apparatus to improve the position limiting effect.

Disclosure of Invention

In view of the above-mentioned drawbacks, the present invention provides an element displacement preventing device for reflow soldering, so as to solve the problem that the existing reflow soldering tool cannot solve the element displacement during the reflow soldering process.

To this end, the present invention provides a component deviation preventing device for reflow soldering, comprising:

the top surface of the lining plate is provided with an element mounting position for welding elements, and the outer side of the element mounting position is provided with a limiting hole;

the limiting piece is arranged on the lining plate, and a limiting convex part matched with the limiting hole is arranged on the bottom surface of the limiting piece; the limiting part comprises a transverse limiting arm and a longitudinal limiting arm which are connected into a whole, and the inner side of a corner formed by the transverse limiting arm and the longitudinal limiting arm faces to an element.

In the above-mentioned technical solution of the component deviation preventing device for reflow soldering, preferably, the length of the longitudinal stopper arm is smaller than the length of the transverse stopper arm.

In the above technical solution of the component deviation prevention device for reflow soldering, preferably, the two limit protrusions are disposed on the transverse limit arm, and are respectively disposed at the free end of the transverse limit arm and at the connection end of the transverse limit arm and the longitudinal limit arm.

In the above technical solution of the component deviation prevention device for reflow soldering, preferably, the limit convex part includes a positioning pin and a limit pin, and the positioning pin is cylindrical and disposed at a connection end where the transverse limit arm is connected with the longitudinal limit arm; the limiting pin is prismatic and is arranged at the free end of the transverse limiting arm.

In the above technical solution of the component deviation prevention device for reflow soldering, preferably, chamfers are provided on bottom surfaces of the stopper pin and the positioning pin.

In the above-mentioned technical solution of the component deviation preventing device for reflow soldering, preferably, the chamfer of the positioning pin is 35 °, and the chamfer of the stopper pin is 30 °.

In the above technical solution of the component deviation prevention device for reflow soldering, preferably, the lateral surfaces of the transverse limiting arm and the longitudinal limiting arm are provided with limiting bumps, and the limiting bumps are disposed on the sides of the transverse limiting arm and the longitudinal limiting arm facing the component.

In the above technical solution of the component deviation preventing device for reflow soldering, preferably, the lateral limiting arm is further provided with an intermediate component limiting bump for limiting a component arranged in the middle when a plurality of components are arranged side by side in the component mounting position; the size of the middle element limit salient point is larger than that of the limit salient point.

In the above-mentioned technical solution of the component deviation preventing device for reflow soldering, preferably, the free ends of the transverse limiting arm and the longitudinal limiting arm are both provided with a rounded corner.

In the above technical solution of the device for preventing component from shifting for reflow soldering, preferably, the limiting member includes a first limiting member and a second limiting member, the first limiting member is configured to be disposed at the upper left corner and the lower right corner of the component, and the horizontal limiting arm is disposed at the right end of the longitudinal limiting arm;

the second limiting piece is used for being arranged at the left lower corner and the right upper corner of the element, and the transverse limiting arm of the second limiting piece is arranged at the left end of the longitudinal limiting arm of the second limiting piece.

According to the technical scheme, the component deviation prevention device for reflow soldering is used for preventing components from deviating in the reflow soldering process of the SMT process, so that the influence of component deviation on the subsequent process and the quality of a PCB finished product in the reflow soldering process is avoided. Compared with the prior art, the invention has the following beneficial effects:

firstly, the limiting part arranged on the lining plate comprises a transverse limiting arm and a longitudinal limiting arm, so that the limiting part plays a role in limiting the elements arranged on the element mounting position in the vertical direction and the horizontal direction, and the deflection of the angle of the elements adhered on the lining plate due to unbalanced stress can be effectively prevented. The limiting part is installed on the lining plate through the limiting convex part, has good stability, can be detachably connected with the lining plate, can be recycled after the reflow soldering process is completed, and achieves the purpose of saving cost.

Secondly, in a preferred scheme of the invention, the limiting convex part comprises a limiting pin and a positioning pin, and chamfers are arranged on the bottom surfaces of the limiting pin and the positioning pin, so that the installation of the limiting convex part can be guided, and the installation of the limiting part is convenient.

Thirdly, in a preferred embodiment of the present invention, the limiting pin and the positioning pin are respectively disposed at the free end of the transverse limiting arm and the connecting end connected to the transverse limiting arm, and the shapes of the limiting pin and the positioning pin are different, so that the function of preventing the limiting element from being misplaced can be achieved, and the convenience of installing the limiting element can be improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly described and explained. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic plan view of a reflow-soldered component displacement preventing apparatus according to the present invention;

FIG. 2 is a schematic plan view of the liner of the present invention;

FIG. 3 is a bottom view of the first position limiting member of the present invention;

FIG. 4 is a cross-sectional view of a first position-limiting element at D-D according to the present invention;

FIG. 5 is a schematic cross-sectional view of a first position-limiting element at E-E according to the present invention;

FIG. 6 is a bottom view of the second limiting member of the present invention;

FIG. 7 is a cross-sectional view of a second position limiting member at F-F according to the present invention;

fig. 8 is a schematic cross-sectional view of the second limiting member at G-G in the present invention.

In fig. 1 to 8, the correspondence between the components is as follows:

liner plate 1, locating part 2, component 3.

The component mounting site 10, the limiting hole 11,

a limit convex part 20, a transverse limit arm 21, a longitudinal limit arm 22, a first limit part 23, a second limit part 24, a limit convex point 25, an intermediate element limit convex point 26,

the positioning pin 201, the spacing pin 202,

the vent 211.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The realization principle of the invention is as follows:

the limiting part is arranged on the lining plate through a limiting hole arranged on the outer side of the element mounting position of the lining plate, and the transverse limiting arm and the longitudinal limiting arm of the limiting part can limit elements arranged on the element mounting position in the vertical direction and the horizontal direction, so that the elements on the lining plate are effectively prevented from being deviated or deflected due to unbalanced stress.

The scheme provided by the invention can limit the elements on the lining plate, realizes the deviation prevention of the elements in the reflow soldering process, avoids the poor finished product caused by the deviation of the elements, and has good deviation prevention effect and strong stability.

Specifically, the present invention provides a component deviation preventing device for reflow soldering, including:

the top surface of the lining plate is provided with an element mounting position for welding elements, and the outer side of the element mounting position is provided with a limiting hole;

the limiting piece is arranged on the lining plate, and a limiting convex part matched with the limiting hole is arranged on the bottom surface of the limiting piece; the limiting part comprises a transverse limiting arm and a longitudinal limiting arm which are connected into a whole, and the inner side of a corner part enclosed by the transverse limiting arm and the longitudinal limiting arm is arranged towards an element.

In order to make the technical solution and implementation of the present invention more clearly explained and illustrated, several preferred embodiments for implementing the technical solution of the present invention are described below.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

In addition, the terms herein: the references to "inner, outer", "front, rear", "left, right", "vertical, horizontal", "top, bottom", etc. are made based on the orientation or positional relationship shown in the drawings and are intended only to facilitate the description of the application and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and therefore should not be construed as limiting the application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Example 1.

As shown in fig. 1, 2, 3 and 4, the component deviation preventing device for reflow soldering according to the present invention includes a backing plate 1 and a stopper 2.

The top surface of the lining plate 1 is provided with an element mounting position 10 for welding the element 3, and the element 3 is stuck in the element mounting position 10 and fixed on the lining plate 1 after a reflow soldering process. The outer side of the element mounting position 10 is provided with a limiting hole 11.

The limiting part 2 is installed on the lining plate 1, and a limiting convex part 20 matched with the limiting hole is arranged on the bottom surface of the limiting part 2. The limiting part 2 comprises a transverse limiting arm 21 and a longitudinal limiting arm 22 which are connected into a whole, and the inner side of a corner part enclosed by the transverse limiting arm 21 and the longitudinal limiting arm 22 is arranged towards the element 3, so that the transverse limiting arm and the longitudinal limiting arm are abutted against the outer side of the element 3, and the element 3 is prevented from being deviated due to unbalanced stress.

Example 2.

The embodiment 2 is a further optimization and improvement of the position limiting element on the basis of the embodiment 1.

As shown in fig. 3 and 5, the longitudinal check arm 22 has a length smaller than that of the lateral check arm 21. The limiting convex parts 20 are arranged on the transverse limiting arm 21, the number of the limiting convex parts 20 is generally two, the limiting convex parts comprise positioning pins 201 and limiting pins 202, the positioning pins 201 are cylindrical, and the positioning pins 201 are arranged at the connecting ends of the transverse limiting arm 21 and the longitudinal limiting arm 22. The stopper pin 202 has a prismatic shape, and the positioning pin 201 is provided at the free end of the lateral stopper arm 21.

The limiting member 2 includes a first limiting member 23 and a second limiting member 24. The first limiting member 23 is configured to be disposed on the upper left corner and the lower right corner of the element 3, and the transverse limiting arm 21 of the first limiting member 23 is disposed on the right end of the longitudinal limiting arm 22 of the first limiting member 23. The second limiting member 24 is arranged at the lower left corner and the upper right corner of the element 3, and the transverse limiting arm 21 of the second limiting member 24 is arranged at the left end of the longitudinal limiting arm 22 of the second limiting member 24.

Because the locating part is including setting up first locating part and the second locating part on the different positions of component, through setting up locating pin and the spacer pin of the different shapes on horizontal spacing arm, can play the function that prevents the locating part and put wrong, make the installation laminating component position of locating part to improve the convenience of locating part installation.

Example 3.

The embodiment 3 is a further optimization and improvement of the positioning pin and the limiting pin on the basis of the embodiment 2.

As shown in fig. 1, 4, 5, 7 and 8, the positioning pin 201 and the stopper pin 202 are provided with chamfers on their bottom surfaces. The chamfer angle of the positioning pin 201 is 35 degrees, the chamfer angle of the limiting pin 202 is 30 degrees, the chamfer angle can play a guiding role in the installation of the limiting convex part, and the installation of the limiting part is facilitated.

The lateral restraint shaft 21 is provided with a vent hole 211. The lateral sides of the transverse limiting arm 21 and the longitudinal limiting arm 22 are provided with limiting salient points 25, the limiting salient points 25 are arranged on one sides of the transverse limiting arm 21 and the longitudinal limiting arm 22, which face towards the element, the limiting salient points 25 abut against the element 3, so that a gap exists between the element and the transverse limiting arm 21 and between the element and the longitudinal limiting arm 22, and the element 3 can be conveniently placed.

When the limiting member 2 is applied to the same component mounting position and a plurality of components 3 are arranged side by side, the transverse limiting arm 21 is provided with an intermediate component limiting salient point 26, the intermediate component limiting salient point 26 abuts against the corner of the component 3 arranged in the middle, and the size of the intermediate component limiting salient point 26 is larger than that of the limiting salient point 25 and is used for preventing the component 3 arranged in the middle from shifting.

The free ends of the transverse limiting arm 21 and the longitudinal limiting arm 22 are provided with round corners, so that the limiting part 2 is prevented from scratching the element and damaging the element.

As shown in fig. 5, the method of use of the present invention is as follows:

after the completion of the printing of the solder paste on the lining plate, the limiting part 3 is installed on the lining plate, wherein a first limiting part is installed at the upper left corner and the lower right corner of the element installation position, a second limiting part is installed at the lower left corner and the upper right corner of the element installation position, the installation of the patch element is carried out after the installation of the limiting part is completed, then the reflow soldering is carried out, and the component can not deviate in the reflow soldering process due to the limiting effect of the limiting part on the component, so that the quality of a finished product of a circuit board can be effectively improved.

Compared with the prior art, the component deviation preventing device for reflow soldering provided by the invention has the following advantages:

1. the limiting part is arranged on the outer side of the element mounting position through a limiting hole arranged on the lining plate, and the limiting part forms limiting in the vertical direction and the horizontal direction on the outer side of the element, so that the element can be fixed on a preset mounting position, the element is effectively prevented from deviating in the reflow soldering process, and a good limiting effect is achieved;

2. the limiting part is arranged on the outer side of the element mounting position, the element mounting position cannot be shielded, the limiting part can be mounted before the element is pasted, and the problems that the element is subjected to pressure to generate displacement or IC pin deformation and the like when the limiting part is mounted can be effectively avoided;

3. the first limiting part and the second limiting part are matched with each other to limit a single element on an element mounting position, so that the problem of unbalanced stress of the element when the same pressing part provides pressure for a plurality of elements is effectively solved, and the anti-deviation and limiting effects of the element are improved;

4. the limiting pin and the positioning pin which are different in shape are arranged on the limiting part, the effect of preventing misplacement is achieved in the installation process of the limiting part, and convenience in installation of the limiting part is improved.

Finally, it should be noted that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present application can implement, so that the present application has no technical essence, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present application without affecting the efficacy and the achievable purpose of the present application.

As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The present invention is not limited to the above-mentioned preferred embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.