Overlapped circuit board vibration tool

Abstract

The utility model discloses a laminated circuit board vibration tool, which comprises a bottom plate, a positioning shaft, a clamping plate, a pressing plate, a fastening screw and a fastening nut, the positioning shaft is fixed on the bottom plate in a threaded connection mode, a circuit board jointed board is placed in the positioning shaft through a positioning hole in the circuit board jointed board, the circuit board jointed board is separated by the clamping plate, and the pressing plate is fixed on the bottom plate through the fastening screw. And finally, the pressing plate is fixed on the bottom plate through the fastening screw and the fastening nut. According to the circuit board vibration tool, a tight constraint design mode is adopted to limit the movement of a product in a vibration test, the clamping plates made of glass fiber plates which are good in strength, high in hardness, light in weight and low in price can effectively press the product, and the reliability of the product in the vibration test process is greatly improved; and the laminated design is adopted, so that the production efficiency is greatly improved, and meanwhile, the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to a vibration tooling, in particular to a tooling for circuit board vibration test. Background Art

[0002] During the production process of a certain type of circuit board product, board-level vibration test is required. Since the production quantity of the circuit board is large and the area is small, the circuit boards are assembled into a panel for production. Considering the relatively thick circuit board and the subsequent board-splitting process, there are very few postage holes connecting each circuit board, resulting in unstable connection between circuit boards. Coupled with the relatively full arrangement of components on the circuit board surface, there are few places where it can be tightly pressed and fixed, seriously affecting the reliability of the subsequent board-level vibration test.

[0003] In addition, due to the large production quantity of the product and the limited number of vibration test benches, performing single-layer circuit board vibration test in each round will seriously affect the delivery time and greatly increase the production cost. Summary of the Utility Model

[0004] In order to solve the above problems, the utility model provides a stacked circuit board vibration tooling, which overcomes the defects of low reliability of circuit board vibration test, long product vibration test cycle and high production cost by means of stacking and pressing.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a stacked circuit board vibration tooling, including a bottom plate, a positioning shaft, a clamping plate, a pressing plate, fastening screws and fastening nuts. The positioning shaft is fixed on the bottom plate by means of threaded connection. The circuit board panel is placed on the positioning shaft through the positioning holes thereon. The circuit board panel is separated by the clamping plate until finally fixed on the bottom plate by the pressing plate through the fastening screws and fastening nuts.

[0006] For the above-mentioned stacked circuit board vibration tooling, the bottom plate is made of hard aluminum material, and its thickness should not be less than 15 mm. The length and width can be adjusted according to the size of the vibration table surface. The redundant part in the middle of the bottom plate should be removed to reduce the weight of the tooling. The through hole for guiding the positioning shaft on the bottom plate and the smooth rod part of the positioning shaft adopt transitional fit. The depth of the through hole is not less than 8 mm, and the perpendicularity requirement between the through hole and the upper surface of the bottom plate is not more than 0.03 mm. The thread fit accuracy between the bottom plate and the positioning shaft is not lower than grade 7.

[0007] For the above-mentioned stacked circuit board vibration tooling, the positioning shaft is made of stainless steel material. The length of the positioning shaft can be determined according to the number of products stacked during the test as needed, but it should not exceed 15 layers of stacked products. The smooth rod part of the positioning shaft and the through hole for guiding on the bottom plate adopt transitional fit. The thread fit accuracy between the positioning shaft and the bottom plate is not lower than grade 7.

[0008] The above-mentioned laminated circuit board vibration tooling, the clamping plate is made of fiberglass board material, and its thickness is determined by the height of the components on the circuit board; the through holes for guiding the positioning shaft on the clamping plate and the smooth rod part of the positioning shaft adopt a transition fit; when the clamping plate is tightened, it should be able to avoid the electronic components on the circuit board.

[0009] The above-mentioned laminated circuit board vibration tooling, the pressing plate is made of stainless steel material.

[0010] The above-mentioned laminated circuit board vibration tooling, the fastening screw is fixed on the bottom plate with a fastening nut in advance.

[0011] The beneficial effects of the present invention are as follows: The circuit board vibration tooling of the present invention adopts a tight constraint design method to limit the movement of the product during the vibration test. The clamping plate made of fiberglass board with good strength, high hardness, light weight and low price can effectively press the product, greatly improving the reliability of the product during the vibration test; adopting a laminated design, it greatly improves the production efficiency and reduces the production cost at the same time. Description of the Drawings

[0012] The present invention will be further described below with reference to the drawings and embodiments.

[0013] Figure 1 It is a schematic diagram of the present invention;

[0014] Figure 2 It is along Figure 1 The schematic diagram of the A-A line in

[0015] In the figure: 1. Bottom plate, 2. Positioning shaft, 3. Clamping plate, 4. Pressing plate, 5. Fastening screw, 6. Fastening nut. Detailed Embodiments

[0016] The laminated circuit board vibration tooling includes a bottom plate 1, a positioning shaft 2, a clamping plate 3, a pressing plate 4, a fastening screw 5 and a fastening nut 6. The fastening screw 5 passes through the through hole of the bottom plate 1 from bottom to top and is fixed on the bottom plate 1 with a fastening nut 6 from the other end. The smooth rod part of the positioning shaft 2 passes through the guiding hole from the bottom of the bottom plate 1, and the threaded part of the positioning shaft 2 is tightly connected with the thread on the bottom plate 1. The circuit board is installed on the positioning shaft 2 through the positioning holes on it, and then the clamping plate 3 is pressed on the circuit board through the positioning holes on it. After installing multiple layers of circuit boards in this way, the pressing plate 4 is passed through the fastening screw 5 to press the installed circuit board layers, and then tightened with a fastening nut 6. After the product is installed, it is fastened to the vibration test bench together with the vibration tooling for testing.

Claims

1. A laminated circuit board vibration tool, comprising a base plate (1), a positioning shaft (2), a clamping plate (3), a pressure plate (4), a fastening screw (5) and a fastening nut (6), characterized in that: The positioning shaft (2) is fixed to the base plate (1) by means of a threaded connection, the circuit board panels are placed into the positioning shaft through the positioning holes thereon, the circuit board panels are separated by a clamping plate (3), and finally the pressing plate (4) is fixed to the base plate by means of a fastening screw (5) and a fastening nut (6).

2. The laminated circuit board vibration tooling according to claim 1, characterized in that: The base plate (1) is made of hard aluminum material, with a thickness of not less than 15 mm. The length and width can be adjusted according to the size of the vibration table. The redundant part in the middle of the base plate (1) should be removed to reduce the weight of the tooling. The through hole on the base plate (1) used to guide the positioning shaft (2) and the smooth rod part of the positioning shaft (2) adopt a transition fit, the through hole depth is not less than 8 mm, and the through hole and the upper surface of the base plate (1) have a verticality requirement of not more than 0.03 mm; the thread fit accuracy of the base plate (1) and the positioning shaft (2) is not less than Grade 7.

3. The laminated circuit board vibration tooling according to claim 1, characterized in that: The positioning shaft (2) is made of stainless steel. The length of the positioning shaft (2) can be determined according to the number of products to be stacked when testing at the same time, but should not exceed 15 layers of stacked products. The bare rod part of the positioning shaft (2) and the guide hole on the bottom plate adopt transition fit. The thread fit accuracy of the positioning shaft (2) and the bottom plate (1) is not less than grade 7.

4. The laminated circuit board vibration tooling according to claim 1, characterized in that: The clamping plate (3) is made of glass fiber board material, and the thickness is determined by the height of the components on the circuit board; the through hole on the clamping plate (3) used to guide the positioning shaft (2) and the smooth rod part of the positioning shaft (2) adopt transition fit; the clamping plate (3) should be able to avoid the electronic components on the circuit board when pressed.

Images