A method for improving drill groove burrs

Abstract

The present invention discloses a method for improving drill groove burrs, which relates to the field of improving drill groove burrs, and comprises the following steps: after the drill groove processing is completed, the cutting position of the groove cutter is recorded, and the horizontal movement distance of the groove cutter is recorded; after the primary processing of the drill groove is completed, a groove cutter of the same size is used to perform secondary processing inside the drill groove; when the groove cutter performs the secondary drilling processing inside the drill groove, the groove cutter retracts 5mil on both sides, and the feed speed and retraction speed of the groove cutter during this process need to be controlled. The method for improving drill groove burrs can save costs and does not affect the quality of the drill groove, and can also improve the drilling effect of the groove cutter. By drilling the groove twice inside the primary drill groove, the burrs inside the drill groove can be cleaned, so that the burrs of the drill groove can be solved in the drilling process, thereby reducing the manpower wasted in repairing the burrs in the subsequent process and the quality risks caused by the burr repair process.

Description

Technical Field

[0001] The invention relates to the technical field of improving drill groove burrs, and in particular to a method for improving drill groove burrs. Background Art

[0002] During the drilling process, the slot cutter needs to be rotated at high speed to punch holes in the workpiece. During the drilling process, the structural characteristics of the slot cutter can automatically remove the generated debris from the inside of the workpiece, thereby completing the drilling process.

[0003] There are many types of drill slots: long slots, short slots, and ultra-short slots. Some short slots require rotation due to the offset of the drill rig itself, and pre-drilling is required to ensure the hole size. Rotation and pre-drilling do not affect the dust removal slot.

[0004] In the process of drilling grooves on workpieces, the grooves are formed by keeping one coordinate axis of the drill bit constant while the other coordinate changes infinitely. When one of the axes changes infinitely, the coordinate changes by a small distance, such as Figure 2 (ca) is the main source of burrs in the slot. This tiny change (burr) is difficult to detect with equipment during the drilling process. After electroplating and surface treatment, the burr will gradually become larger. When it is discovered, it can only be repaired manually. Manual repair not only increases costs, but is also easily affected by external factors and is prone to quality problems.

[0005] Patent application publication number CN105729557A discloses a method for improving PCB drilling burrs. A layer of resin is applied to the PCB surface in contact with the backing plate. After the resin is cured, it is used for PCB drilling. By applying a layer of resin to the metal surface of the PCB with large warping deformation, the high hardness and strong adhesion of the cured resin are utilized to suppress the generation of drilling burrs. This also reduces the requirements for PCB board warping deformation and backing plate quality for PCB drilling processing quality.

[0006] Patent application publication number CN104070247B discloses a simple method for removing burrs from external thread drilling. The method utilizes the high hardness of the thread ring gauge itself and processes the thread ring gauge into the style shown in the structural diagram. The thread ring gauge is cut into a groove with a width of about 1 to 2 mm from the middle by wire cutting, and a Φd hole (generally Φ3 to Φ5) is cut about 3 mm away from the disconnection position to maintain a certain elastic deformation of the thread ring gauge after cutting. The method has a simple design, convenient material acquisition and production, low cost, and wide practicality. It can meet the use of different types of products with the same thread specification. Other products with different thread specifications can be processed using the same method. The method has a high reusability rate and can be achieved without the need for high-precision processing. It can also be used for the repair of thread blockages caused by thread damage on external thread products.

[0007] Patent application publication number CN118612962A discloses a method for removing burrs from L-shaped slots on server circuit boards by circumferential drilling. The method includes first drilling an L-shaped slot on the PCB board. This process is completed in the same quadrant. After drilling the L-shaped slot, circumferential deburring holes are added at the connection between the L-shaped slots. The burr removal holes are cut into 0.12mm-0.15mm from the connection between the L-shaped slots. The number of burr removal holes is set to 11 or more. The burr removal holes are cut in an arc shape around the edge of the special-shaped hole wall. This method can solve the burr problem of the L-shaped slot while drilling in a quadrant mode, meeting customer needs and improving the convenience of drilling operation and processing efficiency.

[0008] In the above-mentioned patent disclosure, for drilling holes, the burrs on round holes can be controlled by controlling the drill bit grinding times, drill bit type (such as coated drill bit), hole limit, parameters, etc., while the drill slot has a coordinate difference of a certain axis at the drilling position, which results in a gap between two coordinate differences on a certain axis after the drill bit is drilled. Burrs are easily generated at the gap position, which makes it easy to deal with the burrs again. At present, most companies deal with the burrs on the drill slot by repairing the finished board, which is easy to affect the effect of the finished board.

[0009] In response to the above problems, it is urgent to carry out innovative designs based on the original methods. Summary of the Invention

[0010] The purpose of the present invention is to provide a method for improving drill groove burrs, so as to solve the problem proposed in the above background technology that the drill groove has a coordinate difference of a certain axis at the drilling position, which leads to two coordinate differences on a certain axis after the drill bit is drilled, resulting in a gap, and burrs are easily generated at the gap position, which makes it easy to deal with the burrs again. At present, most companies deal with drill groove burrs by repairing the finished plate, which easily affects the effect of the finished plate.

[0011] To achieve the above object, the present invention provides the following technical solution: a method for improving drill groove burrs, comprising the following steps:

[0012] Step S1: After the groove drilling process is completed, the lowering position of the groove cutter is recorded, and the horizontal movement distance of the groove cutter is recorded;

[0013] Step S2: After the primary processing of the drilled groove is completed, a groove cutter of the same size is used to perform secondary processing inside the drilled groove;

[0014] Step S3: When the groove cutter performs secondary groove processing inside the drill groove, the groove cutter is retracted by 5 mil on both sides, and the cutting position needs to be controlled;

[0015] Step S4: When the groove cutter performs secondary groove drilling inside the groove, the groove cutter needs to be replaced, and the feed speed and retract speed of the groove cutter need to be controlled during this process;

[0016] In step S1, the slotting cutter needs to first drill holes at both ends of the slotting position, and after the holes at both ends of the slotting position are drilled, the cutter continues to drill the slot between the two groups of holes. In addition, two cuts are required for drilling the slot and drilling the hole, which will cause a single coordinate distance change in the cutter position.

[0017] In the step S1, when recording the positions of the two times of the slotting knife opening holes and the single time of the slotting knife drilling, there will be a gap position between the position of the first time of the slotting knife opening holes and the position of the first time of the slotting knife drilling holes, and the gap position is the difference between the distance between the first time of the slotting knife opening holes and the first time of the slotting knife drilling holes, such as Figure 2 , the gap position is equal to (ca).

[0018] Preferably, in step S4, the grooving cutter needs to be replaced before the secondary grooving process, and the secondary grooving uses a grooving cutter with a higher grinding frequency to save costs, and the size of the grooving cutter for the secondary grooving is the same as that for the initial grooving.

[0019] Preferably, in step S3, the groove cutter is retracted by 5 mil on both sides during the secondary grooving process, so that the secondary grooving position is kept to completely cover the gap position, and the secondary grooving makes the groove cutter move from left to right inside the groove, and the horizontal movement distance of the groove cutter needs to be controlled.

[0020] Preferably, in step S4, the feed speed of the grooving cutter for the second drilling needs to be controlled, and the feed speed is kept twice as fast as the initial drilling feed speed to improve efficiency. The feed position needs to be controlled, and the grooving cutter needs to be kept moving horizontally inside the drill groove.

[0021] Preferably, in step S4, the tool retraction speed of the grooving cutter needs to be controlled when the grooving cutter performs secondary grooving, and the secondary grooving retraction speed is 1.5 times the initial grooving retraction speed to improve efficiency, and the retraction position needs to be controlled.

[0022] Preferably, in step S3, after the two sides are retracted by 5 mil, the gap position formed by the first drilling groove will be completely covered by the second drilling bit, thereby removing the burrs caused by the coordinate change.

[0023] Preferably, in step S3, the position of the secondary drill groove will cover the position of the slit, and the position of the slit depends on the cutting position of the primary drill groove, and the slit is located inside the primary drill groove.

[0024] Preferably, in step S3, the secondary drilling of the groove by the groove cutter automatically removes the debris in the groove, and the secondary drilling of the groove requires replacing the groove cutter used for the initial drilling of the groove, and the size of the groove cutter used remains the same;

[0025] In step S3, the size of the secondary drilled groove is smaller than that of the primary drilled groove, the width of the secondary drilled groove is the same as that of the primary drilled groove, the time taken for the secondary drilled groove is less than that of the primary drilled groove, and the depth of the secondary drilled groove is the same as that of the primary drilled groove.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. By drilling a second groove inside the first groove, the burrs inside the groove can be cleaned, so that the burrs of the groove can be solved during the drilling process, thereby reducing the manpower wasted in repairing the burrs in the later stage of the process and the quality risks caused by the repair process;

[0028] 2. By replacing the groove cutter with a higher wear rate or a dull groove cutter during the secondary groove drilling process, costs can be saved without affecting the quality of the drilled groove. At the same time, the groove drilling effect of the groove cutter can be improved, which facilitates the removal of burrs during the secondary groove drilling process.

[0029] 3. Furthermore, by increasing the feed speed and retraction speed of the groove cutter during secondary groove drilling, the time required for secondary groove drilling can be shortened, thereby improving the efficiency of the method for removing burrs and improving the practicality of the method;

[0030] 4. Furthermore, by recording the position of the grooving cutter, the position of the grooving cutter can be controlled, thereby ensuring the accuracy of the grooving cutter during the secondary grooving and ensuring the accuracy of the burr removal during the secondary grooving;

[0031] 5. Furthermore, by controlling the speed of the slotting cutter during secondary slotting, production efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a flow chart of the method for operating the trench drilling equipment of the present invention;

[0033] Figure 2 This is a schematic diagram of the initial drilling and slotting position of the slotting cutter of the present invention;

[0034] Figure 3 This is a schematic diagram of the secondary drilling and deburring state of the present invention. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] Example 1: This example Figure 1-Figure 3 As shown, in order to solve the problem that the existing drill groove is prone to burrs, the specific process of removing burrs from the drill groove is disclosed, and the method can effectively remove burrs. The specific content is as follows:

[0037] Wrap the following steps:

[0038] S1. After the groove drilling process is completed, the lowering position of the groove cutter is recorded, and the horizontal movement distance of the groove cutter (i.e., the length of the drill groove) is recorded;

[0039] S2, after the primary processing of the drill groove is completed, a groove cutter of the same size is used to perform secondary processing inside the drill groove;

[0040] S3. When the groove cutter performs secondary groove drilling (i.e., dust cleaning groove) inside the drill groove, the groove cutter retracts 5mil on both sides and the cutting position needs to be controlled;

[0041] S4. When the groove cutter performs secondary groove processing inside the drill groove, the groove cutter needs to be replaced, and the feed speed and retract speed of the groove cutter need to be controlled during this process;

[0042] When drilling a groove with a slotting cutter, holes must be drilled at both ends of the groove. After the holes are drilled at both ends of the groove, the cutter is continued to drill the groove between the two groups of holes. Since two cuts are required for both the groove drilling and the hole drilling, the coordinate distance of the cutter position will change.

[0043] Record the positions of the two times the grooving cutter is cut and the single time the grooving cut is made. There will be a gap between the first time the grooving cut is made and the first time the grooving cut is made. The gap is the difference between the designated position and the actual position of the grooving cutter.

[0044] The groove cutter needs to be replaced before the secondary groove drilling process. The secondary groove drilling uses a groove cutter with a higher grinding frequency, and the groove cutter size for the secondary groove drilling is the same as the groove cutter size for the initial groove drilling.

[0045] During the secondary drilling process, the groove cutter is retracted by 5 mil on both sides so that the secondary drilling groove completely covers the gap position. The secondary drilling process makes the groove cutter move from left to right inside the groove, and the horizontal movement distance of the groove cutter needs to be controlled.

[0046] The feed speed of the slot cutter for secondary slot drilling needs to be controlled, and the feed speed should be kept twice as fast as the initial slot drilling speed. The feed position needs to be controlled, and the slot cutter needs to be kept moving horizontally inside the slot.

[0047] The tool retraction speed needs to be controlled when the groove cutter performs secondary groove retraction, and the secondary groove retraction speed is 1.5 times the initial groove retraction speed, and the retraction position needs to be controlled;

[0048] When both sides are retracted by 5mil, the gap formed by the first drilling groove will be completely covered by the second drilling nozzle, thereby removing the burrs caused by the coordinate change.

[0049] The position of the secondary drilling cutter will cover the gap position to remove burrs. The position of the gap position depends on the position of the cutter for the initial drilling groove, and the gap position is located inside the initial drilling groove.

[0050] The secondary drilling of the groove by the groove cutter will automatically remove the debris in the groove, and the secondary drilling of the groove cutter needs to replace the groove cutter used for the initial drilling of the groove, and the groove cutter size used remains the same;

[0051] The size of the secondary drill groove is smaller than that of the primary drill groove, and the width of the secondary drill groove is the same as the width of the primary drill groove. The time used for the secondary drill groove is less than the time used for the primary drill groove, and the depth of the secondary drill groove is the same as that of the primary drill groove.

[0052] In the drawings of the specification, coordinates (ab) are the designated positions where the fluting tool is used to drill the hole, coordinates (cb) are the actual positions where the fluting tool is used to drill the fluting for the first time, and the distance between coordinates a and c is the gap position.

[0053] In the process of improving the drilling groove burr method, it is necessary to first use a slotting cutter to perform a hole drilling process at a designated position of the workpiece, and two groups of drill holes are opened, and the two groups of drill holes have the same size. Then, the cutter can continue to be cut inside one of the drill holes and the slotting cutter is made to feed the inside of the drill hole to the inside of the other group of drill holes. After the two groups of rotary holes are connected, the drilling groove is completed.

[0054] In the process of drilling and grooving, the slot cutter will have a slight position change, which will lead to the appearance of burrs, that is, the gap position. The appearance of the burr can be identified by the positioning of the two sets of lower knives, and the gap position is located inside the drill slot.

[0055] After that, the gap position inside the drill groove can be cleaned. Before the secondary processing of the drill groove position, the groove cutter needs to be replaced with a groove cutter of the same size, and the groove cutter is ground higher than the groove cutter used for drilling the groove. In the process of the groove cutter working, it is necessary to make the groove cutter retract 5mil on both sides on the basis of the initial groove, so that the feed speed of the groove cutter can be twice the initial groove speed, and in the process of the groove cutter retracting, the speed of the groove cutter is 1.5 times the initial retracting speed, which can shorten the time in the process of completing the burr removal, thereby improving the efficiency of the drill groove deburring.

[0056] When CAM is making data, a dust cleaning slot with a double-sided indentation of 5 mil is added after making the normal drill slot and drill belt. This slot uses a drill bit that is the same size as the slot width. The same applies to the ultra-short slot and the ultra-short slot. The dust cleaning slot is not pre-drilled or rotated.

[0057] The engineering department checked the drill tape data of the PCB and used Genesis2000 to add a dust cleaning slot with a double-sided indentation of 5 mil inside each slot;

[0058] After the drill belt is completed and converted to CAM350 format, the engineering department names all the drill bits for the dust removal slots with the number ending in 4, such as 0.804, 1.254, 2.504, etc.

[0059] When the operator opens the drill belt, he adjusts the parameters of the drill bits ending with 4, adjusting the feed speed to 2 times the original speed and the retract speed to 1.5 times the original speed.

[0060] After the above is completed, the machine can be started and production can be carried out normally. Due to the adjustment of parameters, the efficiency will not be greatly affected.

[0061] In the method for improving drill groove burrs, the burrs inside the drill groove can be cleaned by drilling a second groove inside the primary groove, so that the burrs of the drill groove can be solved during the drilling process, thereby reducing the manpower wasted in repairing the burrs in the later stage of the process and the quality risks caused by the repair of the burrs. By replacing the groove cutter with a higher grinding rate or a sluggish groove cutter during the secondary drilling process, costs can be saved without affecting the quality of the drill groove. At the same time, the drilling effect of the groove cutter can be improved, which provides convenience for removing burrs in the secondary drilling process. By increasing the feed speed and retract speed of the groove cutter during the secondary drilling process, the time required for the secondary drilling process can be shortened, thereby improving the efficiency of the method in removing burrs and improving the method. The practicality of release is that by drilling a second groove inside the first groove, the burrs inside the groove can be cleaned, so that the burrs of the groove can be solved during the drilling process, thereby reducing the manpower wasted in repairing the burrs in the later stage of the work and the quality risks caused by the burr repair process. By replacing the groove cutter with a higher grinding frequency or a stagnant groove cutter during the secondary drilling process, costs can be saved without affecting the quality of the groove. At the same time, the drilling effect of the groove cutter can be improved, which provides convenience for removing burrs in the secondary drilling. By increasing the feed speed and retract speed of the groove cutter during the secondary drilling, the time required for the secondary drilling can be shortened, thereby improving the efficiency of the method in removing burrs and improving the practicality of release.

[0062] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0063] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for improving drill groove burrs, characterized in that: The following steps are involved: Step S1: After the groove drilling process is completed, the lowering position of the groove cutter is recorded, and the horizontal movement distance of the groove cutter is recorded; Step S2: After the primary processing of the drilled groove is completed, a groove cutter of the same size is used to perform secondary processing inside the drilled groove; Step S3: When the groove cutter performs secondary groove processing inside the drill groove, the groove cutter is retracted by 5 mil on both sides, and the cutting position needs to be controlled; Step S4: When the groove cutter performs secondary groove drilling inside the groove, the groove cutter needs to be replaced, and the feed speed and retract speed of the groove cutter need to be controlled during this process; In step S1, the slotting cutter needs to first drill holes at both ends of the slotting position, and after the holes at both ends of the slotting position are drilled, the cutter continues to drill the slot between the two groups of holes. In addition, two cuts are required for drilling the slot and drilling the hole, which will cause a single coordinate distance change in the cutter position. In step S1, when recording the positions of the two times the groove cutter is struck to open a hole and the single time the groove is drilled, there is a gap position between the position of the initial hole opening and the position of the initial groove drilling, and the gap position is the difference between the position of the initial hole opening and the position of the initial groove drilling by the groove cutter, the coordinate (ab) is the designated position of the groove drilling tool for drilling a hole, the coordinate (cb) is the actual position of the groove drilling tool for the initial groove drilling, and the distance between the coordinate a and the coordinate c is the gap position; In step S3, the secondary drilling of the groove by the groove cutter automatically removes the debris in the groove, and the secondary drilling of the groove requires replacing the groove cutter used for the initial drilling of the groove, and the size of the groove cutter used remains the same; In step S3, the size of the secondary drilled groove is smaller than that of the primary drilled groove, the width of the secondary drilled groove is the same as that of the primary drilled groove, the time taken for the secondary drilled groove is less than that of the primary drilled groove, and the depth of the secondary drilled groove is the same as that of the primary drilled groove.

2. The method for improving drill groove burrs according to claim 1, characterized in that: In step S4, the grooving cutter needs to be replaced before the secondary grooving process. The secondary grooving uses a grooving cutter with a higher grinding frequency to save costs, and the size of the grooving cutter for the secondary grooving is the same as that of the grooving cutter for the initial grooving.

3. The method for improving drill groove burrs according to claim 1, characterized in that: In step S3, during the secondary grooving process, the grooving cutter is retracted by 5 mil on both sides to keep the secondary grooving position completely covering the gap position, and the secondary grooving makes the grooving cutter move from left to right inside the grooving, and the horizontal movement distance of the grooving cutter needs to be controlled.

4. The method for improving drill groove burrs according to claim 1, characterized in that: In step S4, the feed speed of the grooving cutter for the second drilling needs to be controlled, and the feed speed is kept twice as fast as the first drilling feed speed to improve efficiency. The feed position needs to be controlled, and the grooving cutter needs to be kept moving horizontally inside the drill groove.

5. The method for improving drill groove burrs according to claim 1, characterized in that: In step S4, the tool retraction speed of the grooving cutter needs to be controlled when the grooving cutter performs secondary grooving. The secondary grooving retraction speed is 1.5 times the initial grooving retraction speed to improve efficiency, and the retraction position needs to be controlled.

6. The method for improving drill groove burrs according to claim 1, characterized in that: In step S3, after the two sides are retracted by 5 mil, the gap formed by the first drilling groove will be completely covered by the second drilling nozzle, thereby removing the burrs caused by the coordinate change.

7. The method for improving drill groove burrs according to claim 1, characterized in that: In step S3, the position of the secondary drill groove will cover the position of the slit, and the position of the slit depends on the cutting position of the primary drill groove. At the same time, the slit is located inside the primary drill groove.

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