阅读说明：本技术 一种铝基板钻孔工艺 (Aluminum substrate drilling process ) 是由 伍长根 于 2021-10-08 设计创作，主要内容包括：本发明涉及铝基板加工技术领域,具体公开了一种铝基板钻孔工艺。该工艺用于在铝基板上钻通孔,包括以下步骤：将酚醛垫板、铝基板和铝片自下而上依次叠放于工作台；利用轴承驱动的钻孔机台自上而下对铝片和铝基板进行钻孔；每当钻孔机台在铝基板上钻出预定深度时,钻孔机台退刀一次,直至钻孔机台钻完通孔的孔深。轴承驱动的钻孔机台动力强,降低了钻头卡死的概率,降低了钻孔机台故障风险,酚醛垫板起到缓冲作用,减少了钻孔时的震动；铝片能散热并清洁钻头,防止钻头刮伤铝基板表面,减少了毛刺,还引导了钻头的轨迹,提高了钻孔准确度；退刀动作使钻头散热且能清理铝丝。上述工艺改进解决了铝丝缠刀和孔边毛屑问题,提高了产品品质。(The invention relates to the technical field of aluminum substrate processing, and particularly discloses an aluminum substrate drilling process. The process is used for drilling through holes on an aluminum substrate and comprises the following steps: stacking a phenolic aldehyde base plate, an aluminum substrate and an aluminum sheet on a workbench from bottom to top in sequence; drilling an aluminum sheet and an aluminum substrate from top to bottom by using a drilling machine driven by a bearing; when the drilling machine station drills out the preset depth on the aluminum substrate, the drilling machine station retreats once until the drilling machine station drills out the hole depth of the through hole. The drilling machine driven by the bearing has strong power, the probability of bit locking is reduced, the failure risk of the drilling machine is reduced, and the phenolic aldehyde base plate plays a role in buffering and reduces vibration during drilling; the aluminum sheet can dissipate heat and clean the drill bit, so that the drill bit is prevented from scratching the surface of the aluminum substrate, burrs are reduced, the track of the drill bit is guided, and the drilling accuracy is improved; the tool retracting action enables the drill to radiate heat and clean the aluminum wire. The process improvement solves the problems of aluminum wire winding cutter and hole edge burrs, and improves the product quality.)

1. An aluminum substrate drilling process for drilling through holes in an aluminum substrate (100), comprising the steps of:

s10, stacking the phenolic aldehyde base plate (300), the aluminum substrate (100) and the aluminum sheet (200) on a workbench (600) from bottom to top in sequence;

s20, drilling the aluminum sheet (200) and the aluminum substrate (100) from top to bottom by using a drilling machine driven by a bearing;

and S30, retracting the drilling machine once when the drilling machine drills out the preset depth on the aluminum substrate (100) until the drilling machine drills out the hole depth of the through hole.

2. The aluminum substrate drilling process of claim 1, wherein the detailed step of step S30 includes:

s31, the drill bit of the drilling machine table rotates along the axis of the drill bit at the drill bit rotating speed, the drill bit drills the preset depth on the aluminum base plate (100) at the cutting feed speed, and the drill bit retreats at the cutting withdrawal speed.

3. The aluminum substrate drilling process according to claim 2, wherein when the diameter of the through hole is greater than 0.2 mm and less than or equal to 1.5 mm, the bit rotation speed is 50000 rpm, the feed speed is 60 mm/min, and the retract speed is 300 mm/min.

4. The aluminum substrate drilling process according to claim 2, wherein when the diameter of the through hole is greater than 1.5 mm and less than or equal to 2.5 mm, the bit rotation speed is 40000 rpm, the feed speed is 60 mm/min, and the retract speed is 280 mm/min.

5. The aluminum substrate drilling process according to claim 2, wherein when the diameter of the through hole is greater than 2.5 mm, the bit rotation speed is 30000 rpm, the feed speed is 60 mm/min, and the retract speed is 280 mm/min.

6. The aluminum substrate drilling process of claim 1, further comprising, after the step S10, the steps of:

s11, positioning the phenolic aldehyde base plate (300), the aluminum base plate (100) and the aluminum sheet (200).

7. The aluminum substrate drilling process according to claim 6, wherein the projections of the phenolic aldehyde shim plate (300), the aluminum substrate (100) and the aluminum sheet (200) on the plane of the worktable (600) are the same.

8. The aluminum substrate drilling process according to claim 7, wherein the edges of the phenolic caul (300), the aluminum substrate (100) and the aluminum sheet (200) are simultaneously defined by positioning frames fixedly connected to the worktable (600).

9. The aluminum substrate drilling process of claim 6, further comprising, after the step S30, the steps of:

s40, taking out the aluminum substrate (100).

10. The aluminum substrate drilling process according to any one of claims 1 to 9, wherein the predetermined depth is 1 mm.

Technical Field

The invention relates to the technical field of aluminum substrate processing, in particular to an aluminum substrate drilling process.

Background

With the continuous update of electronic products, high-power electronic products are emerging continuously to meet the requirements of people on higher performance of the electronic products. The current high-power electronic product has higher and higher requirements on the heat dissipation performance of components, and if the heat dissipation performance of a substrate is poor, the components are overheated, so that the reliability of the whole machine is reduced, and the service life is shortened. Under the background, a metal-based printed circuit board with high heat dissipation has come into use, and the metal-based printed circuit board is a special printed circuit board and mainly comprises different types such as a copper substrate, an aluminum substrate and a stainless steel substrate. The aluminum substrate has advantages of light weight, low cost, strong processability, excellent electrical performance, heat dissipation, electromagnetic shielding performance, high voltage resistance and the like, and is widely used.

However, the aluminum substrate is too thick and has strong flexibility, so that problems of aluminum wire winding cutter, hole edge burrs and the like exist in drilling production, and the quality of products is affected.

In the process of drilling the aluminum substrate, two prominent problems exist: firstly, the problems of aluminum wire winding cutter, hole edge burrs and high temperature during drilling are considered; secondly, the power of the drill bit is difficult to meet the requirement, and the conventional drill bits such as air compression driving and the like are easy to cause the situation that the drill bit is blocked when a thicker aluminum substrate is drilled.

Disclosure of Invention

The invention aims to provide an aluminum substrate drilling process to solve the problem of poor quality of aluminum substrate drilling products.

In order to achieve the purpose, the invention adopts the following technical scheme:

a drilling process of an aluminum substrate is used for drilling a through hole in the aluminum substrate, and comprises the following steps:

s10, stacking the phenolic aldehyde base plate, the aluminum substrate and the aluminum sheet on a workbench from bottom to top in sequence;

s20, drilling the aluminum sheet and the aluminum substrate from top to bottom by using a drilling machine driven by a bearing;

and S30, when the drilling machine station drills the aluminum substrate to the preset depth, the drilling machine station retreats once until the drilling machine station drills the through hole to the depth of the through hole.

The detailed steps of step S30 include:

and S31, the drill bit of the drilling machine rotates along the axis of the drill bit at the drill bit rotating speed, the drill bit drills the preset depth on the aluminum base plate at the feed speed, and the drill bit retracts at the retraction speed.

Preferably, when the diameter of the through hole is greater than 0.2 mm and less than or equal to 1.5 mm, the rotation speed of the drill bit is 50000 rpm, the feed speed is 60 mm/min, and the retracting speed is 300 mm/min.

Preferably, when the diameter of the through hole is greater than 1.5 mm and less than or equal to 2.5 mm, the rotation speed of the drill is 40000 rpm, the feed speed is 60 mm per minute, and the retracting speed is 280 mm per minute.

Preferably, when the diameter of the through hole is greater than 2.5 mm, the rotation speed of the drill bit is 30000 rpm, the feed speed is 60 mm/min, and the retracting speed is 280 mm/min.

Preferably, after step S10, the method further includes the following steps:

s11, positioning the phenolic aldehyde base plate, the aluminum substrate and the aluminum sheet.

Further, the projections of the phenolic aldehyde base plate, the aluminum substrate and the aluminum sheet on the plane where the workbench is located are the same.

And further, the edges of the phenolic aldehyde base plate, the aluminum substrate and the aluminum sheet are simultaneously limited by adopting a positioning frame fixedly connected on the workbench.

Preferably, after step S30, the method further includes the following steps:

and S40, taking out the aluminum substrate.

Preferably, the predetermined depth is 1 mm.

The invention has the beneficial effects that:

in the aluminum substrate drilling process, the drilling machine driven by the bearing is high in power, so that the probability of the drill bit blocking condition is greatly reduced, and the risk that the drilling machine is damaged in the drilling process is reduced; the phenolic aldehyde base plate plays a role in buffering, and vibration during drilling is reduced; the aluminum sheet has the heat dissipation effect, the drill bit can be kept clean, the probability of damage to the outer surface of the aluminum substrate caused by the drill bit is reduced, burrs at the edge of the through hole can be reduced due to the arrangement of the aluminum sheet, meanwhile, the drilling track of the drill bit can be guided, and the drilling accuracy is improved; when the drilling machine station drills out a preset depth, the cutter is withdrawn once, so that the heat dissipation of the drill bit and the cleaning of aluminum wire scraps are facilitated; the process improvement solves the problems of aluminum wire winding cutter and hole edge burrs, and improves the product quality.

Drawings

Fig. 1 is a schematic structural diagram of an aluminum substrate drilling process provided in an embodiment of the present invention;

FIG. 2 is a front view of an aluminum substrate drilling process provided by an embodiment of the invention;

FIG. 3 is a flowchart of an aluminum substrate drilling process according to an embodiment of the present invention;

fig. 4 is a front view of a routing process provided in an embodiment of the present invention;

fig. 5 is a flowchart of a routing forming process according to an embodiment of the present invention.

In the figure:

100. an aluminum substrate; 200. aluminum sheets; 300. a phenolic aldehyde backing plate; 400. kraft paper; 500. a boss member; 600. a work table; 700. and (6) routing.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 1 to fig. 3, the present embodiment provides an aluminum substrate drilling process for drilling a through hole in an aluminum substrate 100, including the following steps:

the method comprises the following steps: the phenolic aldehyde backing plate 300, the aluminum substrate 100 and the aluminum sheet 200 are sequentially stacked on the worktable 600 from bottom to top.

Step two: and drilling the aluminum sheet 200 and the aluminum substrate 100 from top to bottom by using a drilling machine driven by a bearing.

Step three: when the drilling machine station drills out a preset depth on the aluminum substrate 100, the drilling machine station retreats once until the drilling machine station drills out the through hole with the depth of the through hole.

In the aluminum substrate drilling process, the drilling machine driven by the bearing is high in power, so that the probability of the drill bit blocking condition is greatly reduced, and the risk that the drilling machine is damaged in the drilling process is reduced; the phenolic aldehyde base plate 300 plays a role in buffering, and vibration during drilling is reduced; the aluminum sheet 200 has a heat dissipation effect, and can keep the drill bit clean, so that the probability of damage to the outer surface of the aluminum substrate 100 caused by the drill bit is reduced, the arrangement of the aluminum sheet 200 is also beneficial to reducing burrs at the edge of the through hole, and meanwhile, the drilling track of the drill bit can be guided, so that the drilling accuracy is improved; when the drilling machine station drills out a preset depth, the cutter is withdrawn once, so that the heat dissipation of the drill bit and the cleaning of aluminum wire scraps are facilitated; the process improvement solves the problems of aluminum wire winding cutter and hole edge burrs, and improves the product quality.

Specifically, the predetermined depth is 1 mm. The predetermined depth can be applied to the drilling operation of the aluminum substrate 100 with a material of 95% pure aluminum and a thickness of 3 mm.

In this embodiment, the detailed steps of step three include: the drill of the drilling machine rotates along the axis thereof at the drill rotation speed, the drill drills out a predetermined depth on the aluminum substrate 100 at the feed speed, and the drill retracts at the retraction speed. By adjusting the drill bit rotating speed, the feed speed and the withdrawal speed of the drill bit, the drilling action can be smoothly completed, and meanwhile, the drilling efficiency is improved.

As shown in table 1, when the diameter of the through hole is greater than 0.2 mm and less than or equal to 1.5 mm, the bit speed is 50000 rpm, the feed speed is 60 mm/min, and the retract speed is 300 mm/min; when the diameter of the through hole is larger than 1.5 mm and less than or equal to 2.5 mm, the rotating speed of the drill bit is 40000 rpm, the feed speed is 60 mm/min, and the withdrawal speed is 280 mm/min; when the diameter of the through hole is larger than 2.5 millimeters, the rotating speed of the drill bit is 30000 revolutions per minute, the feed speed is 60 millimeters per minute, and the withdrawal speed is 280 millimeters per minute.

Specifically, the tool changing operation of the drill bit is performed every time the drill bit drills 50 through holes with a diameter larger than 0.2 mm and smaller than or equal to 1.5 mm, or 30 through holes with a diameter larger than 1.5 mm and smaller than or equal to 2.5 mm, or 20 through holes with a diameter larger than 2.5 mm.

TABLE 1

Diameter of through hole x (mm)	Drill speed (rad/min)	Feed speed (mm/min)	Retracting speed (mm/min)
				0.2＜x≤1.5	50000	60	300
1.5＜x≤2.5	40000	60	280
				＞2.5	30000	60	280

Preferably, after the step one, the following steps are further included: the phenolic caul 300, aluminum substrate 100, and aluminum sheet 200 are positioned. The positioning action ensures that the phenolic aldehyde base plate 300, the aluminum substrate 100 and the aluminum sheet 200 do not have relative offset in position in the drilling process, and ensures the yield of the drilling operation and the drilling efficiency.

Further, the projections of the phenolic aldehyde backing plate 300, the aluminum substrate 100 and the aluminum sheet 200 on the plane of the worktable 600 are the same. The arrangement facilitates the positioning of the phenolic aldehyde base plate 300, the aluminum base plate 100 and the aluminum sheet 200, and is also helpful for taking the phenolic aldehyde base plate 300, the aluminum base plate 100 and the aluminum sheet 200 by an operator.

Still further, the edges of the phenolic aldehyde shim plate 300, the aluminum substrate 100 and the aluminum sheet 200 are simultaneously defined by positioning frames fixedly connected to the worktable 600. Specifically, the phenolic aldehyde backing plate 300, the aluminum substrate 100 and the aluminum sheet 200 are all rectangular pieces, and the lengths and the widths of the three pieces are respectively the same; the positioning frame is composed of four protrusion members 500, the protrusion members 500 extend in a direction perpendicular to the plane of the table 600, and the four protrusion members 500 are used to position four corners of the rectangular member, respectively. The arrangement enables the positioning frame to limit the phenolic aldehyde base plate 300, the aluminum substrate 100 and the aluminum sheet 200 in the direction parallel to the plane of the worktable 600.

Preferably, after the third step, the following steps are also included: the aluminum substrate 100 is taken out.

As shown in fig. 4 and 5, the aluminum substrate 100 processing process provided in this embodiment can also be applied to routing operation.

In the existing gong board forming process, besides the problems of aluminum wire winding cutters and hole edge burrs, the cut gong board 700 is easy to have the situation that the groove edge burrs and the groove wall are rough, so that the quality of the product cannot be guaranteed.

The gong board forming process is used for cutting the gong board 700, and comprises the following steps:

the method comprises the following steps: the phenolic aldehyde backing plate 300 and the kraft paper 400 are stacked on the workbench 600 from bottom to top, the pin penetrates through the kraft paper 400 and the phenolic aldehyde backing plate 300 and is inserted into the workbench 600, and the outer side face of the pin can be attached to the inner side wall of the positioning hole of the routing board 700.

Step two: the gong board 700 is sleeved on the pin, so that the gong board 700 is stacked on the kraft paper 400 and the circuit surface of the gong board 700 is in contact with the kraft paper 400.

Step three: and sleeving the aluminum sheet 200 on the pins, so that the aluminum sheet 200 is stacked on the gong board 700.

Step four: and cutting the gong board 700 by using the gong knife until the cutting is finished.

Step five: the pins are disassembled and the gong board 700 is taken out.

According to the forming process, the kraft paper 400 can fill the space between the circuit surface and the kraft paper 400 in a manner of contacting the circuit surface with the kraft paper 400, so that the protection effect on the circuit surface can be achieved, the risk that the circuit surface is scratched by aluminum wire scraps is effectively avoided, and the yield of the routing forming process is ensured; the arrangement of the pins ensures the positioning effect of each component, avoids the position deviation of the phenolic aldehyde backing plate 300, the routing board 700, the kraft paper 400 and the aluminum sheet 200 in the drilling process, and ensures the efficiency and the yield of routing board forming; the phenolic aldehyde backing plate 300 and the aluminum sheet 200 can play the same role in the aluminum substrate drilling process in the routing forming process, and the description is omitted; the process improves, reduces the risks of burrs on the edge of the groove of the gong board 700 and the roughness of the groove wall, and improves the quality of products.

Preferably, the gong sword is twolip gong sword, and twolip gong sword has the chip removal good, the heat dissipation is fast, characteristics such as cutting sharpness, can effectively reduce the cell wall roughness of gong board 700 edge burrs after the cutting. Specifically, the milling speed of the double-edge milling cutter is 2.0 m/min, the rotating speed is 30000-.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.