Method for improving drilling groove burrs

Abstract

The invention discloses a method for improving drilling groove burrs, which relates to the field of drilling groove burr improvement, and comprises the following steps: recording the cutting position of a grooving cutter after drilling groove processing is completed, and recording the horizontal movement distance of the grooving cutter; and after primary machining treatment of the drilling groove is completed, a groove cutter with the same size is used for conducting secondary machining treatment in the drilling groove, when the groove cutter conducts secondary drilling treatment in the drilling groove, the two edges of the groove cutter retract inwards by 5 mil, and the cutter feeding speed and the cutter retracting speed of the groove cutter in the process need to be controlled. According to the method for improving the burrs of the drilling groove, cost can be saved, the quality of the drilling groove is not affected, meanwhile, the groove drilling effect of the groove cutter can be improved, the burrs in the drilling groove can be cleaned through secondary drilling in the primary drilling groove, the burrs of the drilling groove can be removed in the drilling working section, and the drilling efficiency is improved. Therefore, manpower wasted by burr repairing in the later working section and potential quality hazards caused in the burr repairing process are reduced.

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 kept rotating at a high speed and punching 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 need to be rotated due to the offset of the drill itself, and pre-drilling is required to ensure the size of the hole. Rotation and pre-drilling do not affect the dust cleaning slot.

[0004] In the process of drilling grooves on the workpiece, the drilling groove is formed by keeping one coordinate axis of the drill unchanged 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 found, it can only be repaired manually. Manual repair not only increases the cost, but is also easily affected by external factors and prone to quality risks.

[0005] Patent application publication number CN105729557A discloses a method for improving PCB drilling burrs, wherein a layer of resin is coated on the PCB surface in contact with the pad, and after the resin is cured, it is used for PCB drilling. By coating a layer of resin on the metal surface of the PCB with large warping deformation, the high hardness and strong bonding force of the resin after curing are used to suppress the generation of drilling burrs, and at the same time, the requirements of the PCB board drilling processing quality on the PCB board warping deformation and the pad quality are reduced;

[0006] Patent application publication number CN104070247B discloses a simple method for removing burrs from external thread drilling. The thread ring gauge has a high hardness and is modified and processed into the style 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 design is simple, the material is easy to obtain and manufacture, the cost is low, and the practicability is wide. It can meet the use of different types of products with the same thread specification. Other products with different thread specifications can be processed by the same method, and the reusability rate is high. It can be achieved without the use of high-precision processing means. It can also be used for the repair of thread blockage products caused by thread damage of external thread products.

[0007] Patent application publication number CN118612962A discloses a processing method for removing burrs from an L-shaped slot of a server circuit board by circumferential drilling. First, an L-shaped slot is drilled on the PCB board. This process is completed in the same quadrant. After drilling the L-shaped slot, a circumferential deburring hole is added at the connection of the L-shaped slot. The cutting position of the deburring hole is 0.12mm-0.15mm away from the connection of the L-shaped slot. The number of deburring holes is set to 11 or more. The deburring hole is cut in an arc shape around the edge of the special-shaped hole wall. The burr problem of the L-shaped slot can be solved 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 of 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 drilling slot has a coordinate difference of a certain axis at the drilling position, which leads to a gap between two coordinate differences of 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 of the drilling slot by repairing the finished board, which is easy to affect the effect of the finished board.

[0009] In view of 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 in a certain axis after the drill bit drills, resulting in a gap, and burrs are easily generated at the gap position, which makes it easy to deal with the burrs again, and currently most companies deal with the 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 moving distance of the groove cutter is recorded;

[0013] Step 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;

[0014] Step S3, when the groove cutter performs secondary groove processing inside the groove, the groove cutter retracts 5 mil on both sides, and the lowering position of the cutter 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 in this process need to be controlled;

[0016] In step S1, the slotting cutter needs to first open holes at both ends of the slotting position, and after the holes at both ends of the slotting position are opened, the cutter continues to complete the slotting process between the two groups of holes. The cutter needs to be opened twice when drilling the slot and opening 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 the slot cutter is used to make holes and the single time the slot is drilled, there will be a gap position between the position of the first time the slot cutter is used to make holes and the position of the first time the slot is drilled, and the gap position is the difference in distance between the position of the first time the slot cutter is used to make holes and the position of the first time the slot is drilled, such as Figure 2 , the gap position is equal to (ca).

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

[0019] Preferably, in step S3, the groove cutter is retracted by 5 mil on both sides during the secondary groove drilling process to keep the secondary groove drilling position completely covering the gap position, and the secondary groove drilling 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 groove cutter for secondary drilling needs to be controlled, and the feed speed is kept twice as fast as the initial drilling speed to improve efficiency. The feed position needs to be controlled, and the groove cutter needs to be kept moving horizontally inside the drill groove.

[0021] Preferably, in step S4, the tool retraction speed of the groove cutter needs to be controlled when the groove cutter performs secondary groove drilling and retraction, and the secondary groove drilling and retraction speed is 1.5 times the initial groove drilling and 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 nozzle, 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 needs to replace 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 drill groove is smaller than that of the primary drill groove, the width of the secondary drill groove is the same as that of the primary drill groove, the time taken for the secondary drill groove is less than that of the primary drill groove, and the depth of the secondary drill groove is the same as that of the primary drill 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 grinding frequency or a sluggish 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 effect of the groove cutter drilling can be improved, which facilitates the removal of burrs in the secondary groove drilling.

[0029] 3. Furthermore, by increasing the feed speed and retract speed of the slotting cutter during secondary slotting, the time required for secondary slotting 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 groove cutter, the position of the groove cutter can be controlled, thereby ensuring the accuracy of the groove cutter during secondary groove drilling and ensuring the accuracy of the groove cutter in removing burrs during secondary groove drilling;

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

[0032] Figure 1 This is a schematic flow chart of the operation method of the drilling equipment of the present invention;

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

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

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0036] Embodiment 1: This embodiment 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 moving distance of the groove cutter (i.e., the length of the groove drilled);

[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 groove, the groove cutter retracts 5mil on both sides and the lowering position of the cutter needs to be controlled;

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

[0042] When drilling a groove with a slotting cutter, holes need to be opened at both ends of the drilling groove position first. After the holes are opened at both ends of the drilling groove position, the cutter continues to drill the groove between the two groups of holes. In addition, the cutter needs to be cut twice when drilling the groove and opening the hole, which will cause a single coordinate distance change in the cutter position.

[0043] Record the positions of the slot cutter for two times of drilling holes and one time of drilling slots. There will be a gap between the position of the first time of drilling holes and the position of the first time of drilling slots, and the gap is the difference between the specified position and the actual position of the slot 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 that 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, and the secondary drilling groove makes the groove cutter move from left to right inside the drill 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 of the slotting cutter needs to be controlled when the slotting cutter performs secondary slotting. The secondary slotting retraction speed is 1.5 times the initial slotting retraction speed, and the retraction position needs to be controlled.

[0048] When both 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.

[0049] The drilling 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, 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 needs to replace the groove cutter used for the initial drilling of the groove, and the size of the groove cutter 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, coordinate (ab) is the designated position of the drilling tool for drilling a hole, coordinate (cb) is the actual position of the drilling tool for the first drilling, and the distance between coordinate a and coordinate 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 punching 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, and then the cutter can continue to be cut inside one of the drill holes and the slotting cutter can be fed from 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, and the appearance of the burrs 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 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 more than the groove cutter used for drilling the groove. In the process of the groove cutter working, the groove cutter needs to be retracted 5mil on both sides on the basis of the initial groove drilling, so that the feed speed of the groove cutter can be twice the initial groove drilling 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 to remove burrs;

[0056] When CAM is making data, after making the normal drill groove and drill belt, a dust cleaning groove with a double-sided inward shrinkage of 5 mil is added. This groove uses a drill tip that is the same size as the groove width. The same is true for the ultra-short groove and the ultra-short groove. The dust cleaning groove 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 all the slots;

[0058] After the drill belt is made and converted to CAM350 format, the engineering department names all the drill bits of the dust removal slots with the end of 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 completing the above, you can start production normally. Due to the adjustment of parameters, the efficiency will not be greatly affected.

[0061] In the method for improving drill groove burrs, by drilling a secondary groove inside the primary groove, the burrs inside the drill groove can be cleaned, 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 frequency 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 effect of the groove cutter drilling the groove can be improved, providing convenience for removing burrs in the secondary drilling. By increasing the feed speed and retracting 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 for removing burrs and improving the method. The practicality of the release is that by drilling a secondary groove inside the primary groove, the burrs inside the drill groove can be cleaned, 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 work and the quality risks caused by the burr repair process. By replacing the groove cutter with a higher grinding frequency 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 effect of the groove cutter drilling the groove can be improved, which provides convenience for removing burrs in the secondary drilling. By increasing the feed speed and retracting 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 for removing burrs and improving the practicality of the release.

[0062] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0063] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present 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 moving distance of the groove cutter is recorded; Step 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; Step S3, when the groove cutter performs secondary groove processing inside the groove, the groove cutter retracts 5 mil on both sides, and the lowering position of the cutter 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 in this process need to be controlled; In step S1, the slotting cutter needs to first open holes at both ends of the slotting position, and after the holes at both ends of the slotting position are opened, the cutter continues to drill the slot between the two groups of holes, and the cutter needs to be opened twice when drilling the slot and opening the hole, which will cause a single coordinate distance change in the cutter position; In the step S1, when recording the positions of the two times the grooving cutter is used to make holes and the single time the grooving cutter is used to drill the groove, there will be a gap position between the position of the first time the grooving cutter is used to make holes and the position of the first time the grooving cutter is used to drill the groove, and the gap position is the difference in distance between the position of the first time the grooving cutter is used to make holes and the position of the first time the grooving cutter is used to drill the groove, as shown in Figure 2, the gap position is equal to (ca).

2. A method for improving drill groove burrs according to claim 1, characterized in that: In step S4, 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 to reduce costs. The size of the groove cutter for the secondary groove drilling is the same as that of the groove cutter for the initial groove drilling, and the parameters of the secondary groove drilling are changed to improve efficiency.

3. The method for improving drill groove burrs according to claim 1, characterized in that: In step S3, the groove cutter is retracted 5 mil on both sides during the secondary drilling process to ensure that all the gaps are covered during the second drilling to remove burrs. The secondary drilling process causes the groove cutter to move from left to right inside the groove, and the horizontal movement distance of the groove 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 groove cutter for secondary groove drilling needs to be controlled to keep the feed speed twice as fast as the initial groove drilling feed speed to improve production efficiency. The feed position needs to be controlled and the groove cutter needs to be kept moving horizontally inside the 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 groove cutter needs to be controlled when the groove cutter performs secondary groove drilling and retraction, and the secondary groove drilling and retraction speed is 1.5 times the initial groove drilling and retraction speed to improve production efficiency.

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 position 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 drilling cutter will cover the gap position to remove burrs. The position of the gap position depends on the position of the cutter in the initial drilling. At the same time, the gap position is located inside the initial drilling groove.

8. The method for improving drill groove burrs according to claim 1, characterized in that: In step S3, 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 needs to replace 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 drill groove is smaller than that of the primary drill groove, the width of the secondary drill groove is the same as that of the primary drill groove, the time taken for the secondary drill groove is less than that of the primary drill groove, and the depth of the secondary drill groove is the same as that of the primary drill groove.

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