CN115971823A - Method for manufacturing precision optical glass ultra-long capillary drill - Google Patents
Method for manufacturing precision optical glass ultra-long capillary drill Download PDFInfo
- Publication number
- CN115971823A CN115971823A CN202211731566.2A CN202211731566A CN115971823A CN 115971823 A CN115971823 A CN 115971823A CN 202211731566 A CN202211731566 A CN 202211731566A CN 115971823 A CN115971823 A CN 115971823A
- Authority
- CN
- China
- Prior art keywords
- drill bit
- plug
- sand
- dynamic balance
- drill
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Landscapes
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
The invention belongs to the field of precision optical glass processing, and discloses a method for manufacturing a precision optical glass ultra-long capillary drill bit. In addition, the invention solves the problem of chip removal and the problem of cutter blockage caused by the breakage of the inner hole core when a deep hole is drilled by changing the outer diameter of the drill bit and the shape of the inner hole, can greatly prolong the service life of the drill bit, and can greatly improve the detection precision of an optical detection instrument when a processed workpiece is assembled on the optical detection instrument.
Description
Technical Field
The invention belongs to the field of precision optical glass processing, and particularly relates to a method for manufacturing a precision optical glass ultra-long capillary drill bit.
Background
The optical glass material is mainly applied to precise optical detection equipment, and the light-transmitting lens and the optical cavity are most applied. The optical glass materials generally comprise common glass, microcrystalline glass, ruby, sapphire, spinel and the like, and the optical glass materials have the characteristics of high hardness, high brittleness, difficulty in processing and the like, are widely applied to optical detection instruments, generally need to be processed into shapes such as grooves and holes for optical parts, need to be processed into ultra-long capillary holes for light transmission on part of the measurement instruments, and have high difficulty in hole processing due to the characteristics of the materials. The optical glass material is drilled by methods such as laser drilling, ultrasonic drilling, and diamond bit electroplating, and the smoothness of the hole wall is greatly different after drilling by each method. The principle of laser drilling is that a part is burnt by laser at high temperature to generate a hole, and the surface of the hole wall is burnt, so that the unevenness of the hole wall is observed under a microscope, the roundness of the hole is out of round, and the hole with the depth of 0-30mm can be generally processed under the influence of laser power, and deep holes with the depth can not be processed; ultrasonic drilling is ultrasonic vibration processing drilling, a drill bit vibrates and breaks workpiece materials through ultrasonic vibration to drill holes, microcracks are generated on the inner wall of the holes, and long-time use can affect the drilling. The microscopic quality of the wall of the light-transmitting hole has direct influence on the performance of the optical part, the wall of the light-transmitting hole is rough, the light-transmitting effect is poor, the light is greatly influenced by the wall of the hole when passing through, the loss is large, and the use performance of the optical part is greatly influenced; the hole wall is smooth and has good light passing effect, light is less influenced by the hole wall when passing through, and the use performance of the optical part is greatly improved. Therefore, how to improve the smoothness of the wall of the light-transmitting hole is the key that directly influences the performance of the optical part.
Disclosure of Invention
The invention aims to overcome the defects of processing the ultra-long capillary hole and provides a method for manufacturing the precision optical glass ultra-long capillary hole drill bit, so that the smoothness of the ultra-long capillary hole is improved.
In order to achieve the purpose, the method comprises the following steps:
s1, processing a hollow steel pipe to serve as a drill bit base body, processing a step surface at the end part of the hollow steel pipe, and processing a plurality of through holes on the axial surface of the hollow steel pipe;
s2, processing a plug, inserting one end of the plug into one end, provided with a step surface, of the hollow steel pipe, wherein the plug comprises a single-straight-edge inner hole plug, a double-straight-edge inner hole plug, a square inner hole plug and a hexagonal plug;
s3, fixing the hollow steel pipe, inserting the plug into the casting sand tank liquid filled with diamond grains, after electrifying, accumulating the diamond grains on the plug by taking nickel as a binder, and finishing drill casting when the casting sand time is up;
s4, grinding the cast drill bit to enable the coaxiality of the cast sand position of a drill bit cutter head and the cutter bar to meet the requirement;
s5, carrying out dynamic balance detection on the sand casting drill bit;
and S6, polishing the casting sand drill bit subjected to dynamic balance detection to finish the manufacturing of the drill bit.
The hollow steel pipe and the plug are connected through tight fit.
The cross section of the straight-edge inner hole plug is circular, and the inner hole is circular with a vertical edge;
the cross section of the double-straight-edge inner hole plug is circular, the inner hole is circular with two vertical edges, and the two vertical edges are arranged in parallel;
the cross section of the square inner hole plug is circular, and the inner hole is square;
the cross section of the hexagonal plug is hexagonal, and the inner hole is hexagonal.
During sand casting, required current parameters are calculated according to the size of the plug and the size after sand casting, the plug is inserted into carborundum casting sand tank liquid with required granularity, a carborundum layer is enabled to be flush with the step surface on the cutter bar, conducting wires are connected to the upper end of the cutter bar and the nickel plate, and sand casting is conducted through electrifying.
The method for grinding the cast drill bit comprises the following steps:
clamping the hollow steel pipe subjected to sand casting on an electric spark outer circle grinding machine, measuring the outer circle runout of a cutter bar above a drill bit after sand casting by using a lever dial indicator, starting to grind the outer circle of a sand casting position of a cutter head if the runout is smaller than a threshold value, enabling the coaxiality of the sand casting position of the cutter head of the drill bit and the coaxiality of the cutter bar to meet requirements, and then grinding the outer circle of the cutter head to the required size.
When the dynamic balance of the cast sand drill bit is detected, detecting a dynamic balance value through a dynamic balance detector, and if the dynamic balance value is smaller than a threshold value, finishing the dynamic balance detection; and if the numerical value of the dynamic balance is larger than the threshold value, reaming the eccentric position, and then carrying out dynamic balance detection until the dynamic balance detection is finished.
During grinding, the casting sand drill bit after dynamic balance detection is clamped, and the end face and the outer circle of the casting sand position of the casting sand drill bit are ground for 5-8 times by using 250# -320# white corundum oilstone.
And (3) performing trial drilling on the polished drill bit, observing the finish of the hole wall after trial drilling, and if the finish of the hole wall does not meet the use requirement, performing polishing and trial drilling on the drill bit again until the finish of the hole wall meets the use requirement.
The hollow steel pipe is a 316 stainless steel hollow steel pipe.
Compared with the prior art, the invention forms the sand casting diamond drill bit by carrying out sand casting, grinding, dynamic balance detection and coping treatment on the plug, the diamond layer at the front end of the drill bit is manufactured by adopting an electroforming sintering process, the bonding force of diamond can be well improved, and the front grinding part is completely the diamond layer, so that the service life of the drill bit and the fineness of pore walls of capillary pores are greatly improved when the drill bit drills at the high rotating speed of 10000-15000 revolutions. In addition, the invention solves the problem of chip removal and the problem of cutter blockage caused by the breakage of the inner hole core when a deep hole is drilled by changing the outer diameter of the drill bit and the shape of the inner hole, can greatly prolong the service life of the drill bit, and can greatly improve the detection precision of an optical detection instrument when a processed workpiece is assembled on the optical detection instrument.
Drawings
FIG. 1 is a schematic representation of the shape and size of the matrix of an exemplary drill bit; wherein, (a) is a front view, and (B) is a B-direction view in (a);
FIG. 2 is a schematic cross-sectional view of a drill bit according to an embodiment; wherein, (a) is a single straight-side inner hole plug, (b) is a double straight-side inner hole plug, (c) is a square inner hole plug, and (d) is a hexagonal plug;
FIG. 3 is a schematic view of the finished shape and dimensions of the drill bit in the example;
FIG. 4 is a schematic representation of a base of an exemplary embodiment of a drill bit;
FIG. 5 is a schematic diagram of an embodiment of a dynamic balance detector;
wherein, 1, hollow steel tube; 2. a plug; 3. a through hole; 4. a screw; 5. the height of the high-speed drill can be adjusted; 6. a high-speed drill bit; 7. fixing a bracket; 8. a base.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, 3 and 4, the present invention comprises the steps of:
s1, processing a hollow steel pipe 1 to serve as a drill bit base body, processing a step surface at the end part of the hollow steel pipe 1, and processing a plurality of through holes 3 on the axial surface of the hollow steel pipe 1;
and S2, processing the plug 2, inserting one end of the plug 2 into one end, provided with a step surface, of the hollow steel pipe 1, and connecting the hollow steel pipe 1 and the plug 2 through tight fit.
S3, fixing the hollow steel pipe 1, determining the required current according to the direction of the plug 2, inserting the plug 2 into a casting sand tank liquid containing 320# carborundum, wherein the insertion depth is 8mm, so that a carborundum layer in the tank liquid is flush with a step surface on a cutter bar, using the hollow steel pipe 1 as the cutter bar, connecting a lead on the uppermost end of the cutter bar and a nickel plate, calculating the required current parameter according to the size of the plug 2 and the size after casting sand, after electrifying, using nickel as a binder to uniformly accumulate the carborundum grains on the plug 2 layer by layer, and finishing the drill casting sand after the time is up;
s4, grinding the drill bit after sand casting, clamping the hollow steel pipe 1 on an electric spark cylindrical grinder, measuring the cylindrical runout of a cutter bar above the drill bit after sand casting by using a lever dial indicator, starting to grind the outer circle of the sand casting position of the cutter head when the runout is smaller than a threshold value, enabling the coaxiality of the sand casting position of the cutter head of the drill bit and the cutter bar to meet the requirement, and then grinding the outer circle of the cutter head to the required size;
s5, carrying out dynamic balance detection on the cast sand drill bit, detecting a dynamic balance numerical value through a dynamic balance detector, and finishing the dynamic balance detection if the dynamic balance numerical value is smaller than a threshold value; if the numerical value of the dynamic balance is larger than the threshold value, reaming the eccentric position, and then carrying out dynamic balance detection until the dynamic balance detection is finished;
s6, polishing the casting sand drill bit which is subjected to the dynamic balance detection, clamping the casting sand drill bit which is subjected to the dynamic balance detection, polishing the end face and the outer circle of the casting sand position of the casting sand drill bit by using 250# -320# white corundum oilstone for 5-8 times, trial drilling the polished drill bit, observing the finish degree of the hole wall after trial drilling, and if the finish degree of the hole wall does not meet the use requirement, polishing the drill bit again and trial drilling the hole until the finish degree of the hole wall meets the use requirement, thereby finishing the manufacture of the drill bit.
Before the sand casting drill bit is manufactured, a base body is manufactured firstly and is divided into a cutter bar and a cutter head, the cutter bar is a 316 stainless steel hollow steel pipe, an aluminum core or a graphite core is fixed in an inner hole at the front end of the steel pipe, after the base body is formed, a layer of carborundum is formed on the outer layer of the aluminum core or the graphite core by a layer of electrocasting sintering process, the whole time needing electrocasting forming is calculated according to the increased thickness size of the carborundum layer per hour and the size needed by final completion, and the finished size can be accurately controlled; taking out the aluminum core or the graphite core after electroforming is finished, soaking the aluminum core in a sodium hydroxide solution, slowly taking out the aluminum core, and directly poking out the graphite core; and finally, grinding the bulge at the joint of the cutter bar and the cutter head on a grinding machine to be flat, and then, electroforming the drill bit. According to the diameter of the drill bit and the drilling depth, the aluminum core or the graphite core can be made into different shapes, the shapes of the inner circle and the outer circle of the drill bit are changed, and the service life of the drill bit and the smoothness of the hole wall after drilling can be better improved.
Referring to fig. 2, the plugs 2 include single-straight-side inner hole plugs, double-straight-side inner hole plugs, square inner hole plugs and hexagonal plugs;
the cross section of the single-straight-edge inner hole plug is circular, and the inner hole is circular with one vertical edge;
the cross section of the double-straight-edge inner hole plug is circular, the inner hole is circular with two vertical edges, and the two vertical edges are arranged in parallel;
the cross section of the square inner hole plug is circular, and the inner hole is square;
the cross section of the hexagonal plug is hexagonal, and the inner hole is hexagonal.
Furthermore, the inner hole and the outer circle of the sand casting drill bit are not made into circles, as shown in figure 2, the drill bit can be well cooled when deep holes are drilled by changing the shapes of the inner hole and the outer circle of the drill bitAnd the chip removal effect reduces the core diameter in the middle after drilling, so that the core diameter is smaller than the diameter of the inner hole of the cutter bar, and the condition that the core is clamped in the inner hole of the cutter bar can be effectively avoided. The diameter of the drill bit is smaller than
The drill bit adopts the shape of 1 straight-edge inner hole, and the diameter of the drill bit is larger than->
The adoption of the drill bit of 2 straight flange inner hole shapes or the drill bit of square inner hole shape, when processing the hole to the harder materials such as sapphire, spinel, because the reason of the characteristic of material itself, the size of blank can not be very big, the degree of depth of processing hole is generally less than 30mm, generally adopts external diameter round hole inner hole square or external diameter inner hole all to be the drill bit of hexagon shape, and the cold is effectual in the drill bit during drilling, and the powder chip removal that produces during drilling is effectual. When drilling, the cold pump in the machine tool is opened, the pressure of water flowing out of the center of the drill bit is accurately controlled through the precise pressure regulating valve according to the diameter of the drill bit, the vibration of the drill bit during drilling is reduced, the service life of the drill bit can be well prolonged by combining the structural design of the shapes of the inner hole and the outer hole of the drill bit, the smoothness of the hole wall of the capillary hole drilled by the workpiece can be improved, the smoothness is high, the light transmission loss is effectively reduced, and the use precision of optical components is improved.
After each long drill bit is clamped, the dynamic balance of the drill bit is detected by a dynamic balance instrument, the dynamic balance value of the drill bit is required to be less than 0.5 mu m, the depth of a trial drilling hole can be 100mm only when the accuracy requirement is met, the straightness of the measured hole is less than 0.01mm after the drilling hole is drilled, and the parallelism of the hole and the hole is less than 0.015mm. If the detected dynamic balance value is larger than 0.5 μm, the adjustment is needed, and the adjustment method is as follows: the excircle of the end part of the cutter bar is provided with 4 through holes with the diameter
General knife bar diameter->
The diameter of the through hole below->
Knife bar diameter>
Diameter of through hole>
Knife bar diameter->
Diameter of through hole>
Diameter of tool shank
Diameter of through hole>
Knife bar diameter->
Diameter of through hole>
Knife bar diameter>
The diameter of the through hole is greater than or equal to>
When the dynamic balance of the drill bit is detected, a mark is made when the position of the excircle is abnormal, the dynamic balance of the drill bit is adjusted by grinding the diameter of the position hole with a small drill bit, and the drill bit is detected again after grinding until the requirement is met. After the dynamic balance detection is qualified, the drill bit is used for testing the hole, the smoothness of the drilled hole is checked under a microscope, and the drill bit can be normally used if no knife line, scratch and the like exist; if obvious knife lines, scratches and the like exist, the end face and the excircle of the drill bit need to be polished by using oilstone, and then the drill bit is advancedAnd (5) testing the hole until the hole wall smoothness is qualified.
The requirement on the smoothness of the pore wall of the capillary hole is higher, the capillary hole can be processed by adopting a process method of drilling and increasing hole expansion, two straight grooves are formed in the excircle of the end part of the hole expansion drill bit by designing the shape structure of the hole expansion drill bit, the effect of chip removal and cooling can be well achieved during hole expansion, in addition, the thickness of the pore wall of the cutter bar base body of the hole expansion drill bit is increased, the strength of the drill bit is improved, deformation is avoided, the straightness of the hole and the smoothness of the inner wall of the hole can be better improved after hole expansion, and the use precision of an optical element is further improved.
The drill bit manufactured by the invention can select different diamond sand granularities according to the finish requirement of the hole wall after drilling, the diamond sand with the granularity of 150# to 200# can be selected when the finish requirement of the hole wall is not high, and the diamond sand with the granularity of 300# to 400# can be selected when the finish requirement of the hole wall is high. When the deep capillary hole is drilled, a pre-drilled hole with the depth of 4mm needs to be drilled firstly, the deep hole to be drilled is positioned, the diameter of a pre-drilled drill bit is 0.02-0.04mm smaller than that of a drilling drill bit, the pre-drilled hole is most suitable, and the long drill bit is used for drilling the deep capillary hole after the pre-drilled hole is drilled. A new drill bit or a drill bit for drilling about 100-120 holes is sharpened by grinding the end face and the outer circle of the drill bit with 250# -320# white corundum oilstone. The diamond coating of the electroplated drill bit is 0.1-0.15mm, the diamond coating can not be used after being worn during drilling, and the number of drilled holes is small; the front grinding part of the drill made by the sand casting process is a diamond sand layer, the whole thickness is generally 0.6-0.8mm, the length is 5-8mm, and the front grinding part has good wear resistance, such as the diameter of 8mm of the diamond sand casting
The drill bit can drill 1200-1500 holes with the depth of 200mm under the normal use condition, so the service life is very long.
The cold water outlet system in the machine tool is composed of various components, including an internal cooling pump, an overflow valve, a precision filter, a check valve, an electromagnetic control pressure regulating valve and a pressure gauge, wherein the internal cooling pump adopts an immersion type multistage booster centrifugal pump, the characteristics of large pressure and stable output are realized, the cold water outlet stability in the drill bit can be continuously kept, the electromagnetic control pressure regulating valve can accurately control the water outlet pressure of the internal cooling, different diamond grit granularities can be selected according to the drill bits with different diameters and different hole wall fineness requirements, different drilling rotating speeds are matched with the feeding speed, the pressure of the cold water in the drill bit and other parameters are combined, the high-precision ultra-long capillary hole can be processed, the processing efficiency and the size precision are improved, and each parameter is detailed in table 1
TABLE 1 drilling parameters matching Table
Example (b):
diameter of fabrication
The sand casting drill bit is characterized in that a drill bit base body is manufactured firstly:
the method comprises the following steps: selecting the outside diameter
Inner bore diameter>
A 316 hollow steel pipe with the length of 220mmmm, a drill base body is processed according to the size shown in figure 1, the hollow steel pipe 1 is processed firstly to be used as the drill base body 1, and the front end is processed to have the diameter->
A step with the length of 2mm, and then 4 diameters on the excircle are processed according to the drawing size>
The through-hole of (a);
step two: processing a plug 2 according to the size of a diagram 3, wherein the plug 2 adopts an aluminum core, and one end of the plug 2 is processed into a diameter
A circle with the length of 3mm is tightly inserted into the inner hole of the hollow steel pipe 1, and then the excircle at the other end of the plug 2 is processed to
The length is 6mm;
step three: selecting a straight-edge plug type according to the structure of the drill bit, clamping the base body with the machined outer circle on a machine tool, machining a straight edge according to the drawing size, and requiring the size from the straight edge to the cylindrical outer circle to be 0.9mm, so that the drill bit base body is manufactured after machining;
step four: clamping the processed base body on a tool, inserting the end of the processed plug into the casting sand tank liquid filled with 320# carborundum downwards to the insertion depth of 8mm, and finishing the casting sand size of the tool bit
Proper current is calculated according to the diameter of the drill bit, a lead is connected to the uppermost end of the cutter bar and the nickel plate, and after the cutter bar is electrified, diamond grains are uniformly accumulated on the plug inserted into the diamond grains layer by taking nickel as a binder. The thickness of the emery stacks is approximately 0.04-0.06mm per hour, depending on the substrate size>
And the size of the sand casting completion>
And calculating the total time for sand casting, and completing the sand casting of the drill bit according to the total time.
Step five: turning the cast-sand drill bit to a grinding process, clamping a drill bit cutter bar on an electric spark cylindrical grinder by using a tool, aligning the cylindrical runout of the cutter bar above the cast-sand of the cutter head by using a lever dial indicator, wherein the runout is required to be less than 0.05mm, starting to grind the outer circle of the cast-sand part of the cutter head after setting parameters of equipment, feeding and grinding the grinding wheel for each time to remove 0.05-0.08mm until the cutter head is ground to the grinding process
And finishing the manufacturing of the sand casting drill bit.
Step six: according to the diagram 5, the manufactured drill bit is clamped by a cutter handle 4 according to the required length, the drill bit and the cutter handle 4 are installed on a dynamic balance detector together, the dynamic balance value is detected, and the drill bit can be normally used when the value is less than 0.5 mu m; when the numerical value is larger than 0.5 mu m, the eccentric position of the drill bit is marked by a marking pen. Two fixing supports 3 capable of precisely adjusting the height are used for clamping a drill bit and a cutter bar, a screw 4 is used for fixing a drill, and a high-speed drill 5 capable of adjusting the height is used for clamping the diameter
The drill bit 6 is used for expanding the hole at the marked position by using a drill bit with the diameter of 0.65mm, the dynamic balance is detected again after the hole is expanded, and the diameter of the drill bit is increased by 0.05mm each time according to the requirement until the dynamic balance of the drill bit is qualified and then used. If the diameter of the reamer bit is increased to 0.9mm, the value of the dynamic balance of the bit is still larger than 0.5 μm, and the bit cannot be used.
Step seven: and clamping the drill with the well-corrected dynamic balance on a main shaft of a machine tool, grinding the end face and the outer circle of the cast sand position of the cutter head by using a No. 300 white corundum oilstone at the rotating speed of the main shaft of 1000 r/min for 5-8 times, and trial drilling after the grinding. The drill bit is long and cannot directly drill, and a pre-drilled hole with the depth of 4mm needs to be drilled firstly, and the diameter of the pre-drilled hole is required to be 0.02-0.04mm smaller than that of the long hole, so that the pre-drilled hole can play a good centering role, and the straightness of the long capillary hole is ensured. When testing holes, a lever dial indicator is used for detecting the jump of the sand casting position of the cutter head, the requirement is less than 0.01, the rotating speed of a main shaft is 15000 r/min when drilling holes, the drilling depth is 150mm, the smoothness of the hole wall is checked under a microscope 10 times of that after 2 holes are tested, and the cutter is qualified if the hole wall is smooth, has no scratch and has no obvious cutter grains; if the hole wall is rough and has scratch and knife lines, the drill bit needs to be ground by the method and then the hole needs to be tested again until the hole quality is qualified.
Referring to fig. 5, the dynamic balance detector comprises a height-adjustable high-speed drill 5, a high-speed drill bit 6, a fixed support 7, a screw rod 4 and a base 8, wherein the height-adjustable high-speed drill 5 and the fixed support 7 are arranged on the base 8, the fixed support 7 and the screw rod 4 are matched with and fix the hollow steel pipe 2, the height-adjustable high-speed drill 5 is provided with the high-speed drill bit 6, and the high-speed drill bit 6 points to the hollow steel pipe 2.
During drilling, program input M07 turns on the internal cooling water outlet system, and input IN PUT COOLANT [0.4-0.5MPA ] to control the pressure of internal cooling water outlet precisely. When the pressure of the cold outlet water needs to be changed, the pressure value in the program is changed. When drilling, the inner cooling pressure is precisely adjusted, so that the drill bit is kept in a stable state during processing, and the qualification of the drilling quality is ensured. And measuring the diameter of the hole after the hole testing is finished, labeling the drill bit, and indicating the use state of the specification of the drill bit, the rotating speed of the main shaft, the feeding speed, the internal cooling pressure and the like so as to be directly used in normal processing.
Claims (9)
1. A method for manufacturing a precision optical glass ultra-long capillary drill bit is characterized by comprising the following steps:
s1, processing a hollow steel pipe (1) to serve as a drill bit base body, processing a step surface at the end part of the hollow steel pipe (1), and processing a plurality of through holes (3) on the axial surface of the hollow steel pipe (1);
s2, machining a plug (2), inserting one end of the plug (2) into one end, provided with a step surface, of the hollow steel pipe (1), wherein the plug (2) comprises a single-straight-edge inner hole plug, a double-straight-edge inner hole plug, a square inner hole plug and a hexagonal plug;
s3, fixing the hollow steel pipe (1), inserting the plug (2) into a casting sand tank liquid containing diamond grains, and after electrifying, enabling the diamond grains to be uniformly accumulated on the plug (2) layer by taking nickel as a binder to finish drill bit casting sand;
s4, grinding the drill bit after sand casting to enable the circumferential degree of the drill bit to meet the requirement;
s5, carrying out dynamic balance detection on the sand casting drill bit;
and S6, polishing the casting sand drill bit subjected to dynamic balance detection to finish the manufacturing of the drill bit.
2. The method for manufacturing the precision optical glass ultra-long capillary drill bit according to claim 1, wherein the hollow steel tube (1) and the plug (2) are connected through tight fit.
3. The method of claim 1, wherein the cross-section of the straight-sided bore plug is circular, and the bore is circular with a vertical side;
the cross section of the double-straight-edge inner hole plug is circular, the inner hole is circular with two vertical edges, and the two vertical edges are arranged in parallel;
the cross section of the square inner hole plug is circular, and the inner hole is square;
the cross section of the hexagonal plug is hexagonal, and the inner hole is hexagonal.
4. The method for manufacturing the precision optical glass ultra-long capillary hole drill bit according to claim 1, wherein during sand casting, required current parameters are calculated according to the size of the plug (2) and the size after sand casting, the plug (2) is inserted into a casting sand groove liquid containing carborundum, a carborundum layer in the groove liquid is enabled to be flush with a step surface on a cutter bar, a conducting wire is connected to the uppermost end of the cutter bar and a nickel plate, and then the sand casting is carried out by electrifying.
5. The method for manufacturing the precision optical glass ultra-long capillary drill according to claim 1, wherein the method for grinding the drill after sand casting comprises the following steps:
clamping the hollow steel pipe (1) on an electric spark external grinding machine, measuring the external circle runout of a cutter bar above a drill bit after sand casting by using a lever dial indicator, starting to grind the external circle of a sand casting position of a cutter head when the runout is smaller than a threshold value, enabling the coaxiality of the sand casting position of the cutter head of the drill bit and the cutter bar to meet the requirement, and then grinding the external circle of the cutter head to the required size.
6. The method for manufacturing the precision optical glass ultra-long capillary drill bit according to claim 1, wherein when the dynamic balance of the cast sand drill bit is detected, a dynamic balance detector detects a dynamic balance value, and if the dynamic balance value is smaller than a threshold value, the dynamic balance detection is completed; and if the numerical value of the dynamic balance is larger than the threshold value, reaming the eccentric position, and then carrying out dynamic balance detection until the dynamic balance detection is finished.
7. The method for manufacturing a precision optical glass ultra-long capillary bore drill according to claim 1, wherein during grinding, the cast sand drill subjected to dynamic balance detection is clamped, and the end face and the outer circle of the cast sand drill at the cast sand position are ground by 250# -320# white corundum oilstone for 5-8 times.
8. The method for manufacturing a precision optical glass ultra-long capillary drill according to claim 7, wherein the polished drill is trial drilled, after trial drilling, the finish of the hole wall is observed, and if the finish of the hole wall does not meet the use requirement, the drill is polished and trial drilled again until the finish of the hole wall meets the use requirement.
9. The method for manufacturing the precision optical glass ultra-long capillary drill bit according to claim 1, wherein the hollow steel tube (1) is a 316 stainless steel hollow steel tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211731566.2A CN115971823A (en) | 2022-12-30 | 2022-12-30 | Method for manufacturing precision optical glass ultra-long capillary drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211731566.2A CN115971823A (en) | 2022-12-30 | 2022-12-30 | Method for manufacturing precision optical glass ultra-long capillary drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115971823A true CN115971823A (en) | 2023-04-18 |
Family
ID=85967814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211731566.2A Pending CN115971823A (en) | 2022-12-30 | 2022-12-30 | Method for manufacturing precision optical glass ultra-long capillary drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115971823A (en) |
-
2022
- 2022-12-30 CN CN202211731566.2A patent/CN115971823A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111805185B (en) | Method for processing tubular part with cavity | |
| CN108436393A (en) | A kind of cylinder roller bearing solid cage processing method and Set and Positioning tooling | |
| Rahman et al. | Effect of machining parameters on hole quality of micro drilling for brass | |
| CN103630453B (en) | One can control high-precision grinding study mechanism experimental provision | |
| CN109531073B (en) | Method for machining inner hole of thin-walled part of pump valve body | |
| CN105840660B (en) | The pockets processing technique of retainer pocket pore structure with stress buffer slot | |
| CN104723038A (en) | Method for machining circular hole alloy steel cage with inner-and-outer double fore shafts | |
| CN108788636A (en) | The precision machining method of oil cylinder piston blind hole | |
| CN106670550A (en) | Drilling and chamfering synthesis tool and manufacturing method thereof | |
| CN103292751A (en) | Pneumatic measuring instrument inner diameter measuring head and manufacturing method thereof | |
| CN107309651B (en) | A kind of clamp for machining and processing method of abnormity through slot | |
| CN105364509A (en) | Processing equipment and processing method for wall thickness difference control and deviation correction of slender shaft workpiece | |
| CN104526889A (en) | Method for manufacturing quartz crystal wafer for high-precision piezoelectric transducer | |
| CN101244525A (en) | Process and testing method for PCB drilling machine drill chuck | |
| CN105215628B (en) | A kind of processing method of high-precision axle bed endoporus | |
| CN115971823A (en) | Method for manufacturing precision optical glass ultra-long capillary drill | |
| CN111791027B (en) | Vertical dovetail seat processing method | |
| CN109848647A (en) | A kind of processing technology of the piston rod of Stirling engine gas distribution piston | |
| CN111571132B (en) | Thin-wall bearing outer ring turning method and outer ring end surface groove symmetry measuring method of thin-wall bearing | |
| CN102658468B (en) | Method, device and drill for machining glass reinforced plastic sleeve | |
| CN104439397A (en) | High-precision deep hole combination drill and machining method thereof | |
| CN112903396B (en) | Rock core grooving tool for fracture toughness experiment and grooving method thereof | |
| CN112548132A (en) | Deep hole boring device with adjustable supporting function | |
| CN201455353U (en) | Positioning structure of central hole of mechanical workpiece | |
| CN102284893B (en) | High-precision permanent magnet seat grinding method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |