CN206332927U - A kind of wiring board for SMT fills board fixing structure - Google Patents

Abstract

A circuit board mounting and fixing structure for SMT, comprising a board mounting base, a carrier board fixture and a fixture; the carrier board fixture is arranged in the board loading base, and the carrier board fixture and the fixture are controlled by the board loading base The joint action fixes the circuit board in the carrier board fixture; the described mounting base is provided with a plurality of fixing components; the described carrier board fixture includes a circuit board fixing area, a fixing part fixing area and a through hole, and the fixing part The length of the fixing area is the same as that of the fixing piece. The utility model has the advantages of simple structure, strong practicability, low production cost, and does not require operators to move fixed parts; reduces the workload and operation difficulty of operators, improves production efficiency, and facilitates the SMT processing of subsequent circuit boards.

Description

A circuit board mounting and fixing structure for SMT

technical field

The utility model belongs to the technical field of SMT, in particular to a circuit board fixing structure for SMT.

Background technique

With the rapid development of human science and technology, emerging technology fields are booming, and the cost of labor and materials for enterprises has soared. Driven by the ultimate goal of profit, the only way to reduce production costs is to maximize profits. As a fully automated and standardized production process, SMT uses high-precision automation equipment for product transmission, printing, placement, welding, and visual inspection. At present, in the process of using high-precision automation equipment to produce circuit boards, the operator first fixes the circuit board on the carrier board fixture, and then uses high-temperature glue with a length of 2/3 of the sides of the two boards to position and limit the edges of the boards, avoiding circuit boards. The board moves, which affects the quality of the product. After the SMT patch is soldered in the furnace, the operator uses anti-static tweezers to remove the high-temperature glue and discard it, and then removes the product. During the production process, the operator needs to manually install the circuit board on the carrier board fixture. After production, it is necessary to manually tear off the high temperature tape to help remove the circuit board from the carrier board fixture. The high temperature tape used in the production process Disposable auxiliary materials such as the use of a large amount, high cost, low production efficiency; dismantling tools manually, the product is stressed or collided with the components during the operation process, which has great hidden dangers to product quality. For example, in the SMT project, special operators are required to install the board on the carrier board fixture before printing the circuit board, and then use two high-temperature adhesives with a length of 80mm and a width of 12mm to adhere to the board edge of the carrier board fixture and the board edge of the circuit board. Carry out positioning and limit position. After the SMT patch is soldered in the furnace, the operator uses anti-static tweezers to remove the high-temperature glue and discard it, and then removes the product: the board loading process requires manual cutting of the high-temperature glue, reaching for the glue paper for 1 second, and cutting the high-temperature glue 2-3 seconds, 3-4 seconds to return to paste high-temperature glue, the process takes 6-8 seconds, the average loading process is 18 seconds, the average production capacity is 3600PCS/H; a roll of high-temperature glue is 12 meters long, the price is 20 yuan, and can be produced 3000PCS, the cost of consumables is 0.00667 yuan, based on the monthly output of 30 million, the consumables are 200,000 yuan/month; Strong adhesiveness, when the adhesive paper is not removed or damaged, it sticks to the carrier fixture, which affects the use of the fixture and is difficult to remove.

Therefore, how to develop a circuit board mounting and fixing structure that is easy to use, improves the mounting efficiency and production efficiency of the SMT pre-SMT circuit board, and has strong applicability, and reduces production costs has become an urgent problem to be solved in the circuit board production process.

Contents of the invention

In view of this, the technical problem to be solved by the utility model is a circuit board mounting and fixing structure for SMT with simple structure, strong practicability and low production cost.

In order to solve the above-mentioned technical problems, the utility model adopts the following scheme to realize: a circuit board mounting and fixing structure for SMT, including a mounting base, a carrier clamp matching the mounting base, and a movable carrier clamp The upper part is used to fix the circuit board on the carrier board fixture; the carrier board fixture is arranged in the board loading base, and the circuit board in the carrier board fixture is fixed through the combined action of the board loading base to control the carrier board clamp and the fixing parts ; The mounting base is provided with a plurality of fixing components protruding upwards; the carrier clamp includes a circuit board fixing area arranged in the middle of the carrier board clamp, and fixing pieces arranged on both sides of the circuit board fixing area The fixing area and a plurality of through holes arranged in the fixing area of the fixing piece and corresponding to the fixing assembly, the length of the fixing area of the fixing piece is the same as the length of the fixing piece, by adjusting the position of the fixing piece in the fixing piece position, to realize the fixing and loosening of the circuit board in the carrier board fixture.

Preferably, the fixing assembly includes an upwardly protruding fixing post and a first absorbing piece arranged on the fixing post.

Preferably, the fixing part fixing area includes a fixing part idle position and a circuit board fixing position whose shape and size are matched with the fixing part; A second absorbing piece is arranged at the position, and the fixing piece is fixed by the second absorbing piece.

Preferably, the fixing member is a magnetic steel strip that is magnetically attracted to both the first absorbing member and the second absorbing member.

Preferably, both the first and second adsorption parts are magnets.

Preferably, the magnetism of the first absorbing part is greater than that of the second absorbing part.

Preferably, the number of said through holes is the same as the number of fixing components.

Preferably, the inner edges of the plurality of through holes are flush with the outer edges of the circuit board fixing area; the partial area of the circuit board fixing position coincides with the circuit board fixing area.

Preferably, the board mounting base is provided with an upwardly protruding carrier fixture positioning piece and a circuit board positioning piece.

Preferably, a carrier fixture positioning hole is provided on the carrier fixture at a position corresponding to the position of the carrier fixture positioning member; the shape and size of the carrier fixture positioning hole match the shape and size of the carrier fixture positioning member; A circuit board positioning hole is provided on the carrier board fixture corresponding to the position of the circuit board positioning part; the shape and size of the circuit board positioning hole match the shape and size of the circuit board positioning part.

Compared with the prior art, the utility model has a simple structure and strong practicability, does not require the use of disposable auxiliary materials in the production process, and there is no residue between the circuit board and the carrier board fixture after production, which effectively reduces the production cost. cost, improve economic benefits, and the circuit board is installed in the process of the carrier board fixture without the operator moving the fixing part, reducing the workload of the operator; in the initial state, the fixing part is located in the idle position of the carrier board fixture; when the SMT is on the When the circuit board is processed, the circuit board is first placed in the circuit board fixing area of the carrier board fixture, and then the carrier board fixture is placed in the board mounting base, and the fixing holes on the board mounting base will be set on the surface of the carrier board fixture. Jack up and suck to the fixed position of the circuit board. When the firmware is sucked and fixed on the fixed position of the circuit board, since the part of the fixed position of the circuit board overlaps with the fixed area of the circuit board, the fixed part passes through the fixed position of the circuit board and the fixed position of the circuit board. The overlapping area of the fixed area fixes the circuit board fixed in the fixed area of the circuit board to realize the fixing effect of the circuit board, reduces the workload and operation difficulty of the operator, shortens the production time, improves the production efficiency, and facilitates the subsequent circuit SMT processing of boards.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a structural schematic diagram of the plate mounting base of the present invention.

Fig. 3 is a sectional view of plane A-A of Fig. 2 .

FIG. 4 is a schematic structural view of the carrier clamp of the present invention.

Fig. 5 is a structural schematic diagram of the utility model after installing a circuit board.

FIG. 6 is a schematic structural view of the fixing member of the present invention after it is fixed on the carrier fixture.

Among them: 1 board mounting base; 11 fixing component; 111 fixing column; 112 first adsorption part; 2 carrier board fixture; 21 circuit board fixing area; 22 fixing part fixing area; 23 through holes; 24 positioning holes for carrier board fixtures; 25 positioning holes for circuit boards; 3 fixing parts.

detailed description

In order to allow those skilled in the art to better understand the technical solution of the utility model, the utility model will be further elaborated below in conjunction with the accompanying drawings.

As shown in Figures 1 to 6, a circuit board mounting and fixing structure for SMT includes a mounting base 1, a carrier clamp 2 that matches the mounting base 1, and a movable set on the carrier clamp. The fixing part 3 is used to fix the circuit board on the carrier board fixture. The carrier fixture 2 is arranged in the board loading base 1 , and the circuit board in the carrier fixture 2 is fixed through the combined action of the carrier fixture 2 and the fixing member 3 controlled by the board loading base 1 . Wherein, the said fixing part 3 is a magnetic steel strip. When in use, the carrier fixture 2 fixed with the fixing part 3 is fixed on the board loading base, so that the automatic fixing of the circuit board can be realized, the operation time is shortened, and the production efficiency is improved.

In order to better absorb and fix the fixing element on the board mounting base, a plurality of upwardly protruding fixing components 11 are provided on the board mounting base 1 . The fixing assembly 11 includes an upwardly protruding fixing post 111 and a first absorbing part 112 disposed on the fixing post 111 for sucking the fixing part 3 . The first adsorption member 112 is a magnet.

In order to better structure with the loading base and improve production efficiency, a special design is made for the loading fixture. The carrier fixture 2 includes a circuit board fixing area 21 for placing a circuit board, a fixing part fixing area 22 for fixing the fixing part 3 and a fixing component 11 for the mounting board base 1 to pass through the carrier fixing part 2 A plurality of through holes 23. The circuit board fixing area 21 is arranged in the middle of the carrier fixture 2 and is recessed downward to form a circuit board placement groove. The fixing part fixing area 22 is arranged on the carrier board fixture, and is located on both sides of the circuit board fixing area 21, and by adjusting the position of the fixing part in the fixing part fixing area 22, the circuit board in the carrier board fixture can be fixed. Fasten and loosen. Wherein, the length of the fixing part fixing area 22 is the same as that of the fixing part 3 . The fixing part fixing area 22 includes a fixing part idle position 221 and a circuit board fixing position 222 whose shape and size are matched with the fixing part; Circuit board fixing area 21. The partial area of the circuit board fixing position 222 overlaps with the circuit board fixing area 21, so that when the fixing member 3 is located at the circuit board fixing position 222, it can fix the circuit board installed in the circuit board fixing area 21, avoiding the SMT process. The circuit board moves, affecting the quality of the product. When the circuit board is not placed in the carrier board fixture, the fixing part 3 is located at the idle position of the fixing part; when the circuit board is installed in the carrier board fixture and placed on the board loading base 1, the fixing part 3 is located at the circuit board fixing position 222 . In order to fix the fixing part better and avoid the fixing part from falling off, a second adsorption part is arranged on the lower end surface of the carrier board fixture 2, at the idle position 221 of the fixing part and the fixing position 222 of the circuit board, and is fixed by the second adsorption part. Fixture 3. The second absorbing part is a magnet. The number of the through holes 23 is the same as the number of the fixing components 11, and the positions of the through holes 23 correspond to the positions of the fixing components 11 in the loading base, so that when the carrier clamp is placed on the loading base, the loading The firmware component 11 in the base 1 can pass through the through hole 23 to lift up the fixing part on the upper end surface of the carrier board fixture. Wherein, the inner edge of the through hole 23 is flush with the outer edge of the circuit board fixing area 21, so that when the carrier board fixture is placed on the mounting base, the firmware component 11 will not affect the position in the circuit board fixing area when moving in the through hole. The location of the circuit board.

In order to reduce the workload of the operator and improve efficiency, the magnetism of the first adsorption part 112 is greater than that of the second adsorption part, so that when the carrier fixture 2 is placed on the board loading base 1, the first adsorption part in the fixed assembly 11. The fixing member 3 can be sucked into the circuit board fixing position 222 to realize the fixing of the circuit board in the carrier board fixing area. Wherein, the fixing part 3 is a magnetic steel bar magnetically attracted to both the first absorbing part 112 and the second absorbing part.

In order to improve the alignment between the mounting base and the carrier fixture, shorten the alignment time, improve production efficiency and the quality of the processed circuit board, an upwardly protruding carrier fixture positioning member 12 is provided on the mounting base 1 And the circuit board positioner 13. The carrier board fixture positioning parts 12 are located at four diagonal corners of the board loading base; the circuit board positioning parts 13 are located inside the fixing assembly 11, and the carrier board clamp positioning parts 12 and the circuit board positioning Parts 13 are positioning posts protruding upwards. Wherein the number of the carrier board fixture positioning parts 12 is four. A carrier fixture positioning hole 24 is provided on the carrier fixture 2 corresponding to the location of the carrier fixture positioning member; the shape and size of the carrier fixture positioning hole 24 matches the shape and size of the carrier fixture positioning member 12 . The carrier fixture positioning holes 24 are located at the four opposite corners of the carrier fixture 2, and the number of the carrier fixture positioning holes 24 is the same as the number of the carrier fixture positioning parts 12, through which the carrier fixture positioning parts 12 Cooperating with the positioning hole 24 of the carrier fixture, the carrier fixture placed in the mounting base can be quickly positioned. Circuit board positioning holes 25 are all provided in the circuit board fixing area 21 of the described board fixture and on the circuit board, and the circuit board positioning holes 25 on the circuit board fixing area 21 and the circuit board positioning holes 25 on the circuit board are set Corresponding to the position of the circuit board positioning member 13 through the circuit board positioning hole 25 on the circuit board fixing area 21 and the circuit board positioning hole 25 on the circuit board, the circuit board in the carrier board fixture can be effectively carried out Alignment to avoid the movement of the circuit board and affect the quality of the product.

Before work, the fixing part is located at the idle position of the fixing part of the carrier board fixture. During work, the operator installs the circuit board in the circuit board fixing area 21 and manually places the carrier board fixture in the board loading base 1 . The operator inserts the through hole 23 of the board loading fixture 2 into the fixing assembly 11 of the board loading base 1 . When the carrier fixture 2 is placed in the plate loading base 1 , the upper end surface of the carrier fixture 2 and the fixing member located at the idle position 221 of the fixing member are lifted up by the fixing assembly 11 . After the carrier board fixture 2 is placed on the board loading base 1, the carrier board fixture positioning member 12 cooperates with the carrier board fixture positioning hole 24 to fix the carrier board fixture 2; the circuit board positioning member 13 passes through the circuit board fixing area 21 The circuit board positioning hole 25 and the circuit board positioning hole 25 on the circuit board are used to align the circuit board in the carrier fixture to prevent the circuit board from moving and affecting the quality of the product. Since the magnetism of the first absorbing part 112 is greater than that of the second absorbing part, when the fixing assembly 11 lifts up the fixing part, the first absorbing part 112 will suck the fixing part 3 into the fixed position 222 of the circuit board to realize loading. For the fixing of the circuit board in the board fixing area, the operator only needs to take out the carrier board fixture from the board loading base, and the operator does not need to manually move the fixing part to the circuit board fixing position 222, reducing the workload of the operator , shorten the operating time and improve production efficiency.

The above-mentioned embodiments are only specific implementations of the present utility model, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present utility model, and these obvious replacement forms all belong to the protection scope of the present utility model.

Claims (10)

1. A circuit board mounting and fixing structure for SMT, characterized in that it includes a mounting base (1), a carrier clamp (2) matching the mounting base (1), and a movable set on the carrier The fixture (3) on the fixture is used to fix the circuit board on the carrier fixture; the carrier fixture (2) is set in the board loading base (1), and the carrier board fixture is controlled by the board loading base (1) (2) and the fixing part (3) work together to fix the circuit board in the carrier board fixture (2); the board mounting base (1) is provided with a plurality of fixing components (11) protruding upward; the described The carrier board fixture (2) includes a circuit board fixing area (21) arranged in the middle of the carrier board holder (2), fixing member fixing areas (22) arranged on both sides of the circuit board fixing area (21), and fixing members A plurality of through holes (23) in the fixing area (22) corresponding to the fixing component (11), the length of the fixing area (22) is the same as the The position of the piece (3) in the fixing area (22) of the fixing piece realizes the fixing and loosening of the circuit board in the carrier board fixture. 2. The circuit board fixing structure for SMT according to claim 1, characterized in that, the fixing assembly (11) includes an upwardly protruding fixing column (111) and a fixing column (111) arranged on the fixing column (111) on the first adsorption piece (112). 3. The circuit board mounting and fixing structure for SMT according to claim 2, characterized in that, the fixing part fixing area (22) includes fixing parts whose shapes and sizes match the fixing parts (3) The idle position (221) and the circuit board fixing position (222); the lower end surface of the carrier board fixture (2) is provided with a second adsorption at the idle position (221) and the circuit board fixing position (222) of the fixing member The fixing part (3) is fixed by the second adsorption part. 4. The circuit board mounting and fixing structure for SMT according to claim 3, characterized in that, the fixing part (3) is magnetically attracted to both the first adsorption part (112) and the second adsorption part magnetic steel bars. 5 . The circuit board mounting and fixing structure for SMT according to claim 4 , characterized in that, both the first adsorption part ( 112 ) and the second adsorption part are magnets. 6. The circuit board mounting and fixing structure for SMT according to claim 5, characterized in that the magnetism of the first absorbing part (112) is greater than that of the second absorbing part. 7. The circuit board mounting and fixing structure for SMT according to any one of claims 1-6, characterized in that, the number of said through holes (23) is the same as the number of fixing components (11). 8. The circuit board mounting and fixing structure for SMT according to claim 7, characterized in that the inner edges of the plurality of through holes (23) are flush with the outer edges of the circuit board fixing area (21) ; Part of the circuit board fixing position (222) overlaps with the circuit board fixing area (21). 9. The circuit board mounting and fixing structure for SMT according to any one of claims 8, characterized in that, the mounting base (1) is provided with an upwardly protruding carrier clamp positioning member (12 ) and circuit board retainer (13). 10. The circuit board mounting and fixing structure for SMT according to claim 9, characterized in that, the carrier board fixture (2) is provided with a loading Board fixture positioning hole (24); the shape and size of the carrier board fixture positioning hole (24) matches the shape and size of the carrier board fixture positioning part (12); the carrier board fixture (2) is positioned with the circuit board A circuit board positioning hole (25) is provided at a position corresponding to the position of the part (13); the shape and size of the circuit board positioning hole (25) match the shape and size of the circuit board positioning part (13).