CN113210679A - Drilling tool and design method thereof - Google Patents
Drilling tool and design method thereof Download PDFInfo
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- CN113210679A CN113210679A CN202110726681.XA CN202110726681A CN113210679A CN 113210679 A CN113210679 A CN 113210679A CN 202110726681 A CN202110726681 A CN 202110726681A CN 113210679 A CN113210679 A CN 113210679A
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- 238000005553 drilling Methods 0.000 title claims abstract description 168
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000013461 design Methods 0.000 title claims abstract description 18
- 230000007704 transition Effects 0.000 claims abstract description 55
- 239000000956 alloy Substances 0.000 claims abstract description 16
- 239000010935 stainless steel Substances 0.000 claims abstract description 11
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 8
- JPNWDVUTVSTKMV-UHFFFAOYSA-N cobalt tungsten Chemical compound [Co].[W] JPNWDVUTVSTKMV-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000004088 simulation Methods 0.000 claims description 29
- 238000003466 welding Methods 0.000 claims description 26
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 12
- 229910045601 alloy Inorganic materials 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000012356 Product development Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005493 welding type Methods 0.000 description 1
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- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
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- B23B51/00—Tools for drilling machines
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Abstract
The invention discloses a drilling tool and a design method thereof, wherein the drilling tool comprises: the drilling body is made of tungsten-cobalt hard alloy materials and is provided with a frustum part; the connecting handle is made of stainless steel materials and comprises a handle part and a transition table part which are connected in the axial direction, the transition table part is in a cone shape, the small end of the transition table part is welded and jointed with the drill bit body, the large end of the cone table part is close to the transition table part, the diameter of the handle part is larger than the maximum diameter of the drill hole body, an annular tool withdrawal groove is arranged between the handle part and the transition table part, the minimum diameter of the tool withdrawal groove is D13, the diameter of the large end of the cone table part is D16, the distance between the minimum diameter of the tool withdrawal groove and the large end of the cone table part is L2, and the value of (D13-D16)/L2 is smaller than or equal to 0.35 in a value of 0.10. The drilling tool can improve the drilling precision. The design method of the drilling tool is used for designing the drilling tool, and the structural parameters of the drilling tool can be conveniently and quickly obtained.
Description
Technical Field
The invention relates to the technical field of drilling tools, in particular to a drilling tool and a design method thereof.
Background
At present, the size of a printed circuit board in electronic equipment becomes smaller and smaller, the diameters of pins of devices such as chips on the printed circuit board are smaller and smaller, and the requirement on the position precision of a hole of the printed circuit board for connecting the pins of the chips is higher and higher. Mechanical drilling is a hole forming method for printed circuit boards, and is widely applied to the field of processing of printed circuit boards because the mechanical drilling has the advantages of low processing cost, high efficiency and the like.
Generally, the drill bit in the mechanical drilling equipment adopts an integral type hard alloy micro drill bit, and the hard alloy drill bit has the characteristics of high bending strength, high compressive strength and the like, so that the drilling quality is ensured. However, the hard alloy is a non-renewable resource, and in order to protect ecological resources, in the prior art, a drill bit is manufactured in a mode that a tail clamping part made of a stainless steel material is welded with a front end hole drilling part made of a hard alloy material, so that the using amount of the hard alloy is reduced.
However, when the drill is rotated at a high speed to perform a drilling operation, dynamic vibration in which the drill is deflected and swung by centrifugal force is generated, and a composite material joined drill in which a tip opening portion made of cemented carbide and a tail clamping portion made of stainless steel are welded has different elastic modulus between cemented carbide and stainless steel, and large dynamic vibration is generated when the drill is rotated at a high speed, and the positioning accuracy of the drill is lowered due to the large dynamic vibration. The stainless steel and hard alloy welding type drill bit in the prior art is difficult to reduce dynamic vibration, and further difficult to ensure drilling precision.
Disclosure of Invention
The invention aims to provide a drilling tool to improve the drilling precision.
In order to achieve the purpose, the invention adopts the following technical scheme:
a drilling tool, the length of the drilling tool is L1, L1 is more than or equal to 31mm and less than or equal to 32mm, and the drilling tool is characterized by comprising:
the drilling body is made of tungsten-cobalt hard alloy materials and is provided with a frustum part;
the connecting handle is made of stainless steel materials and comprises a handle part, a positioning table part and a transition table part which are sequentially connected along the axial direction, the positioning table part and the transition table part are in a conical shape, the large end of the positioning table part is connected with the handle part, the small end of the transition table part is welded and jointed with the drill bit body, the large end of the cone table part is close to the transition table part, the diameter of the handle part is larger than the maximum diameter of the drill bit body, the diameter of the handle part is D11, 1.9mm is larger than or equal to D11 and smaller than or equal to 2.1mm, the diameter of the small end of the positioning table part is D12, the diameter of the large end of the transition table part is D14, an annular tool withdrawal groove is arranged between the positioning table part and the transition table part, the minimum diameter of the tool withdrawal groove is D13, D13 is smaller than D12, D13 is smaller than D14, the diameter of the large end of the cone table part is D16, and the distance from the minimum diameter of the large end of the tool withdrawal groove to the large end of the cone part is L2, 0.10 </L2 is less than or equal to 0.35.
Wherein the length of the drilling body is L3, L3 is more than or equal to 2.5mm and less than or equal to 6.7 mm; and/or the angle of the taper angle of the frustum part is alpha, and alpha is more than or equal to 2 degrees and less than or equal to 15 degrees.
The drilling body further comprises a drilling part, the drilling part is coaxially connected to one side of the small end of the frustum part, the diameter of the drilling part is equal to that of the small end of the frustum part, the diameter of the drilling part is D17, and D17 is not less than 0.01mm and not more than 0.6 mm.
Wherein, the lateral wall of drilling portion is provided with helical chip groove along the axis direction.
The drill hole body further comprises a welding part, the welding part is coaxially arranged on one side of the large end of the frustum part, the welding part is welded and jointed with the transition frustum part, the diameter of the welding surface of the welding part and the transition frustum part is D15, D15 is more than or equal to 0.3mm and less than or equal to 0.8mm, and D15 is more than or equal to D16.
The diameter of the large end of the transition table part is D14, and D14 is more than or equal to 1.2mm and less than or equal to 1.8 mm; and/or the angle of the cone angle of the transition table part is beta, and beta is more than or equal to 3 degrees and less than or equal to 6 degrees.
The length of the positioning table part is L12, the length of the tool withdrawal groove is L13, and the length of L12+ L13 is more than 0 and less than or equal to 4 mm.
The invention has the beneficial effects that:
the invention provides a drilling tool, which is formed by welding a drilling body made of a hard alloy material and a connecting handle made of a stainless steel material, so that the using amount of hard alloy is saved, the use of non-renewable resources is saved, and the manufacturing cost of the drilling tool is reduced; an annular tool withdrawal groove is formed between the positioning table part and the transition table part, so that a step can be prevented from being formed during grinding of the transition table part, and the step can reduce the vibration resistance of the whole drilling tool; the drilling tool is characterized in that the drilling body is provided with a frustum part, the diameter of the large end of the frustum part is D16, the minimum diameter of the tool withdrawal groove is D13, the diameter of the small end of the positioning frustum part is D12, the diameter of the large end of the transition frustum part is D14, D13< D12 and D13< D14, the distance between the minimum diameter of the tool withdrawal groove and the large end of the frustum part is L2, 0.10 < (D13-D16)/L2 is less than or equal to 0.35, and D13, D16 and L2 are in the range, so that the drilling tool has high resonance frequency, can prevent the drilling tool and a chuck of a mechanical drilling machine using the drilling tool from generating resonance during high-speed rotation, can effectively inhibit dynamic vibration during high-speed rotation of the drilling tool, improve the stability during high-speed rotation of the drilling tool, improve the drilling precision, ensure the drilling quality and prolong the service life of the drilling tool.
Another object of the present invention is to provide a method for designing a drilling tool to shorten a design cycle of the drilling tool, the method comprising the steps of:
s1, determining a plurality of parameter models, wherein each parameter model comprises a plurality of design parameters capable of determining the specific structure of the drilling tool;
s2, carrying out simulation on each parameter model to obtain a simulation result of each parameter model under the same working condition;
s3, obtaining a current optimal parameter model according to the comparison of the simulation results;
s4, trial-manufacturing a model sample based on the current optimal parameter model;
s5, processing a plurality of hole sites by adopting the model sample;
and S6, detecting the CPK value of each hole site, and if the CPK value of each hole site meets the requirements, confirming the final finished product according to the model sample.
In step S6, if the CPK value of at least one hole site does not meet the requirement, the method returns to step S3 after the current optimal parameter model is removed.
In step S3, the simulation result is a deformation amount and/or a natural frequency of the model parameter obtained by simulation.
The invention has the beneficial effects that:
the invention provides a design method of a drilling tool, which can simulate the actual working state of the drilling tool in advance, select a simulation model meeting the actual production requirement, manufacture an entity sample according to the structural parameters of the simulation model, detect whether the entity sample can meet the actual production requirement, conveniently and quickly obtain the structural parameters of the drilling tool meeting the production requirement, and shorten the product development period.
Drawings
FIG. 1 is a schematic diagram of a drilling tool according to one embodiment of the present invention;
FIG. 2 is another schematic diagram of a drilling tool according to one embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a drilling tool according to a second embodiment of the present invention;
FIG. 4 is another schematic structural view of a drilling tool according to a second embodiment of the present invention;
FIG. 5 is a diagram illustrating a method for designing a drilling tool according to a second embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a drilling tool with different structural parameters according to a second embodiment of the present invention;
FIG. 7 is a schematic illustration of the drilling accuracy of the drilling tool with different structural parameters according to the second embodiment of the present invention;
fig. 8 is a schematic explanatory view of the drilling accuracy corresponding to the model sample in the second embodiment of the present invention.
In the figure:
100. a drilling tool; 200. a mechanical drill;
1. drilling a hole body; 2. a connecting handle;
11. a frustum portion; 12. drilling a hole part; 13. welding the part;
21. a handle; 22. a transition table portion; 23. a tool withdrawal groove; 24. a table portion is positioned.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
Example one
As shown in fig. 1, the present embodiment provides a drilling tool 100, and the drilling tool 100 can be used in the field of processing a printed circuit board in a mobile phone, a display, or the like, for drilling a hole in the printed circuit board to perform operations such as soldering a chip.
The drilling tool 100 in this embodiment is mounted on a mechanical drilling machine, and the mechanical drilling machine drives the drilling tool 100 to rotate at a high speed to drill a hole on the printed circuit board.
Specifically, as shown in FIGS. 1-2, the length of the boring tool 100 in this embodiment is L1, 31mm L1 mm 32 mm. The drilling tool 100 includes: the drilling body 1 is made of tungsten-cobalt hard alloy materials, and the drilling body 1 is provided with a frustum part 11; the connecting handle 2 is made of stainless steel materials, the connecting handle 2 comprises a handle part 21, a positioning table part 24 and a transition table part 22 which are sequentially connected along the axial direction, the positioning table part 24 and the transition table part 22 are both conical, the large end of the positioning table part 24 is connected with the handle part 11, the small end of the transition table part 22 is welded and jointed with the drill bit body 1, the large end of the cone table part 11 is close to the transition table part 22, the diameter of the handle part 21 is larger than the maximum diameter of the drill bit body 1, the diameter of the handle part 21 is D11, 1.9mm is larger than or equal to D11 and smaller than or equal to 2.1mm, the diameter of the small end of the positioning table part 24 is D12, the diameter of the large end of the transition table part 22 is D14, an annular tool withdrawal groove 23 is arranged between the positioning table part (24) and the transition table part 22, the minimum diameter of the tool withdrawal groove 23 is D13, D13 is smaller than D12, D13 is smaller than D14, the diameter of the large end of the cone part 11 is D16, the distance from the minimum diameter of the tool withdrawal groove 23 to the large end of the cone part 11 is L2, 0.10 < (D13-D16)/L2 is less than or equal to 0.35.
In the embodiment, the length of the drilling tool 100 is L1, L1 is larger than or equal to 31mm and smaller than or equal to 32mm, the drilling body 1 is made of hard alloy materials, the connecting handle 2 is made of stainless steel materials, the drilling tool 100 is formed by welding the drilling body 1 and the connecting handle 2, the use amount of hard alloy is saved, the use of non-renewable resources is saved, and the manufacturing cost of the drilling tool 100 is reduced; an annular tool withdrawal groove 23 is formed between the positioning table part 24 and the transition table part 22, so that a step can be avoided from being formed during grinding processing of the transition table part 22, and the step can reduce the vibration resistance of the whole drilling tool 100; the drilling tool 100, in which the diameter of the large end of the frustum part 11 is D16, the diameter of the small end of the positioning frustum part 24 is D12, the diameter of the large end of the transition frustum part 22 is D14, the minimum diameter of the tool withdrawal groove 23 is D13, D13< D12 and D13< D14, the distance between the minimum diameter of the tool withdrawal groove 23 and the large end of the frustum part 11 is L2, 0.10 < (D13-D16)/L2 is less than or equal to 0.35, and D13, D16 and L2 are in the range, has high resonance frequency, can prevent the drilling tool 100 and a chuck of a mechanical drilling machine using the drilling tool 100 from generating resonance during high-speed rotation, can effectively inhibit dynamic vibration during high-speed rotation of the drilling tool 100, improve stability of the drilling tool 100 during high-speed rotation, improve drilling accuracy, ensure drilling quality, and prolong the service life of the drilling tool 100.
Specifically, the drilling body 1 is made of tungsten-cobalt hard alloy, and the tungsten-cobalt alloy has high bending strength, compressive strength, impact toughness and elastic modulus and a small thermal expansion coefficient, so that the drilling quality of the drilling body 1 can be improved.
Further, as shown in fig. 1, in the present embodiment, the length of the drilling body 1 is L3, L3 is greater than or equal to 2.5mm and less than or equal to 6.7mm, the drilling body 1 can penetrate through an object to be drilled to perform drilling, and the vibration resistance of the drilling tool 100 is reduced by too long or too short the length of the drilling body 1.
Further, as shown in fig. 2, the taper angle α of the frustum portion 11 is α, 2 ° ≦ α ≦ 15 °, the frustum portion 11 is a partial structure of the drilling body 1, the frustum portion 11 is used for connecting the torsion force when the shank 2 rotates, and the taper angle α of the frustum portion 11 in this range can improve the vibration resistance of the entire drilling tool 100.
Further, as shown in FIGS. 1-2, the drill body 1 further comprises a drill portion 12, the drill portion 12 is coaxially connected to one side of the small end of the frustum portion 11, the diameter of the drill portion 12 is equal to that of the small end of the frustum portion 11, and the diameter of the drill portion 12 is D17, 0.01mm ≦ D17 ≦ 0.6 mm.
In the embodiment, the drilling part 12 can penetrate through electronic components such as a printed circuit board to drill a hole on a drilled object, the drilling part 12 is in a columnar structure, the diameter of the drilling part 12 is D17, D17 is larger than or equal to 0.01mm, and the diameter of the drilling part 12 is selected according to the actual drilling size so as to match the processing of various electronic products.
Further, a spiral chip groove (not shown) is formed on the outer side wall of the drilling portion 12 in the axial direction, and the chip groove enables accumulated chips generated in the drilling process to be smoothly discharged.
Further, as shown in fig. 1-2, the drill body 1 further comprises a welding portion 13, the welding portion 13 is coaxially arranged on one side of the large end of the frustum portion 11, the welding portion 13 is welded and jointed with the transition table portion 22, the diameter of the welding surface of the welding portion 13 and the transition table portion 22 is D15, D15 is more than or equal to 0.3mm and less than or equal to 0.8mm, and D15 is more than or equal to D16.
In the embodiment, the welding part 13 is welded with the transition table part 22, so that the drilling body 1 made of hard alloy material and the connecting handle 2 made of stainless steel material form a complete drilling tool 100, the diameter of the welding surface between the welding part 13 and the transition table part 22 is D15, D15 is more than or equal to 0.3mm and less than or equal to 0.8mm, and the welding surface can ensure that the drilling body 1 and the connecting handle 2 are welded firmly when the handle part diameter D11 of the connecting handle 2 is more than or equal to 1.9mm and less than or equal to D11 and less than or equal to 2.1mm within the range. The welding portion 13 may be cylindrical or conical, and when the welding portion 13 is cylindrical, D15 is D16; when the welding portion 13 is tapered, D15 > D16.
Further, as shown in FIG. 2, the transition land 22 has a large end diameter D14, 1.2mm D14 mm 1.8 mm.
Further, as shown in FIG. 2, the transition table portion 22 has a cone angle β of 3 ≦ β ≦ 6, within which the cone angle β of the transition table 22 can improve the vibration resistance of the overall drilling tool 100.
Further, as shown in fig. 1-2, a positioning table portion 24 is provided between the transition table portion 22 and the shank portion 21, the positioning table portion 24 is tapered, a large end of the positioning table portion 24 is coaxially connected to the shank portion 21, a diameter of the large end of the positioning table portion 24 is equal to a diameter of the shank portion 21, a diameter of the small end of the positioning table portion 24 is larger than a diameter of the large end of the transition table portion 22, and a relief groove 23 is provided between the positioning table portion 24 and the transition table portion 22. The length of the positioning table part 24 is L12, the length of the tool withdrawal groove 23 is L13, and L12+ L13 are more than 0 and less than or equal to 4 mm.
In the present embodiment, the positioning table portion 24 is used to facilitate the positioning and mounting of the boring tool 100 on the mechanical drill when the entire boring tool 100 is mounted on the mechanical drill; or the entire boring tool 100 may be placed in a tool box and positioned with the boring tool 100 in the tool box.
Example two
The present embodiment also provides a method for designing a drilling tool, which is used for designing the drilling tool in the first embodiment.
As shown in fig. 3, the drilling tool includes a shank 21, a positioning land 24, a relief groove 23, a transition land 22, a welded portion 13, a frustum portion 11, and a drilling portion 12.
As shown in fig. 5, the method for designing the structural parameters of the drilling tool comprises the following steps:
and step S1, determining a plurality of parameter models, wherein each parameter model comprises a plurality of design parameters capable of determining the specific structure of the drilling tool.
In the present embodiment, the design parameters include, but are not limited to: as shown in fig. 3-4, when the drilling tool 100 is clamped to the machine drill 200, the unclamped shank 21 length L11, the positioning land 24 length L12, the relief groove 23 length L13, the transition land 22 length L14, the weld 13 length L15, the frustum 11 length L16, the drill 12 length L17, the shank 21 diameter D11, the positioning land small end diameter D12, the relief groove 23 minimum diameter D13, the transition land 22 large end diameter D14, the transition land 22 small end diameter D15, the frustum 11 large end diameter D16, and the drill 12 diameter D17.
Wherein, each parameter needs to satisfy the following conditions:
L11+L12+L13+L14+L15+L16+L17≤19.25mm；
L12+L13+L14+L15+L16+L17≤12.5mm；
2.5mm≤L15+L16+L17≤6.7mm；
0＜L12+L13≤4mm；
1.9mm≤D11≤2.1mm；
1.2mm≤D14≤1.8mm；
0.3mm≤D15≤0.8mm；
when determining the plurality of parameter models, values of selectable design parameters are determined according to design requirements, processing capabilities of processing equipment, process capabilities, conditions that each parameter needs to satisfy, and the like, and the design parameters are not specifically limited in this embodiment.
And step S2, performing simulation on each parameter model to obtain a simulation result of each parameter model under the same working condition.
The same operating condition is specifically the same rotational speed. In this embodiment, the rotation speed of the simulation model of the drilling tool is 33 ten thousand revolutions per minute, and the rotation frequency is 5500 Hz. The rotation speed of the simulation model of the drilling tool can be selected according to actual use requirements, and the embodiment is not particularly limited.
In this embodiment, the simulation result to be obtained is mainly the natural frequency of the simulation structure, and in other embodiments, the simulation result may also be the offset of the drilling tool simulation model with respect to the axis thereof or the combined result of the offset and the natural frequency.
In this embodiment, the simulation of the parametric model is specifically performed using CAE simulation software, and the simulation simulates the simulation result when the drilling tool is clamped on the chuck of the mechanical drilling machine.
And step S3, obtaining the current optimal parameter model according to the comparison simulation result.
The method specifically comprises the following steps:
s31, screening a target parameter model set;
in the present embodiment, a smaller offset amount indicates higher drilling accuracy, and a higher natural frequency indicates that resonance of the drilling tool can be prevented.
In this embodiment, a target parameter model set is screened based on the natural frequency, and when the natural frequency obtained by the parameter model simulation is greater than or equal to the preset frequency, the parameter model falls into the target parameter model set.
In other embodiments, the target parameter model may also be screened based on the offset, and when the maximum offset obtained by the parameter model simulation is less than or equal to the preset offset, the parameter model falls into the target parameter model set.
In other embodiments, the set of target parametric models may also be filtered based on both the offset and the natural frequency. Namely, when the natural frequency obtained by the simulation of the parameter model is greater than or equal to the preset frequency and the maximum offset is less than or equal to the preset offset, the parameter model falls into the target parameter model set.
S32, screening the current optimal parameter model in the current target parameter model set;
in this embodiment, the current optimal parametric model is screened based on the natural frequency, that is, the parametric model with the largest corresponding natural frequency is selected as the current optimal parametric model.
And step S4, trial-producing model samples based on the current optimal parameter model.
The method comprises the following steps of 1: 1 to test whether the model sample meets the hole site processing requirement.
And step S5, processing a plurality of hole sites by adopting the model sample.
And S6, detecting the hole site machining precision CPK value of each hole site, executing the step S7 if the CPK values of all the hole sites meet the requirements, and executing the step S8 if the CPK value of at least one hole site does not meet the requirements.
If the CPK is more than or equal to 1.33, the drilling tool meets the actual production requirement, and mass production is carried out according to the structural parameters of the drilling tool; if CPK < 1.33, the drilling tool does not meet the actual production requirements.
And step S7, confirming the final finished product based on the current model sample.
And S8, removing the target parameter model set from the current optimal parameter model, updating the target parameter model set, and returning to the step S3.
By using the method, the actual working state of the drilling tool can be simulated in advance in software, the simulation model meeting the actual production requirement is selected, the entity sample is manufactured according to the structural parameters of the simulation model, whether the entity sample can meet the actual production requirement is detected, the structural parameters of the drilling tool meeting the production requirement can be conveniently and quickly obtained, and the product development period is shortened.
Illustratively, a drilling tool with a drilling part diameter D17, D17 being 0.15mm and a shank diameter D11, D11 being 2mm is designed by using a structural parameter design method of the drilling tool, and the specific design method is as follows:
as shown in fig. 6, 8 types of boring tools having different structural parameters were provided, and the structural parameters of each boring tool were as shown in fig. 7. 3-4, explaining the definition of the parameters in FIG. 7 by taking one of the drilling tools as an example, when the drilling tool 100 is clamped on the mechanical drill 200, the unclamped shank 21 length L11, the locating land 24 length L12, the relief groove 23 length L13, the transition land 22 length L14, the weld 13 length L15, the frustum 11 length L16, the drill 12 length L17, the shank 21 diameter D11, the locating land small end diameter D12, the minimum diameter D13 of the relief groove 23, the transition land 22 large end diameter D14, the transition land 22 small end diameter D15, the frustum 11 large end diameter D16, and the drill 12 diameter D17, and D13< D12, D13< D14.
Firstly, inputting the structural parameters of each drilling tool in the CAE simulation software, and writing a program in the CAE simulation software, so that the CAE simulation software can output the corresponding offset and natural frequency of each drilling tool clamped in the chuck of the mechanical drilling machine, specifically, the corresponding rotating speed of each drilling tool clamped in the chuck of the mechanical drilling machine is 33 ten thousand revolutions per minute, the rotating frequency is 5500Hz, as shown in fig. 7, and the offset and natural frequency of each drilling tool are obtained. Wherein, structure III's drilling portion offset is minimum, and the whole natural frequency of boring tool is the highest, and its drilling accuracy grade is excellent, and its drilling accuracy is superior to other 7 kinds of structures, consequently, adopts 1 with structure III's structural parameter: 1, placing the model sample into a hole site detector, and drilling 5 times by using the model sample to obtain the hole site processing precision CPK value shown in figure 8, wherein the CPK values corresponding to 5 hole sites are all larger than 1.33, so that the drilling tool manufactured by the structural parameters can meet the actual production requirements.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A drilling tool, the length of the drilling tool is L1, L1 is more than or equal to 31mm and less than or equal to 32mm, and the drilling tool is characterized by comprising:
the drilling body (1), the drilling body (1) is made of tungsten-cobalt hard alloy materials, and the drilling body (1) is provided with a frustum part (11);
the connecting handle (2), the connecting handle (2) is made of stainless steel material, the connecting handle (2) comprises a handle part (21), a positioning table part (24) and a transition table part (22) which are sequentially connected along the axial direction, the positioning table part (24) and the transition table part (22) are both in a conical shape, the large end of the positioning table part (24) is connected with the handle part (11), the small end of the transition table part (22) is welded and jointed with the drill bit body (1), the large end of the cone table part (11) is close to the transition table part (22), the diameter of the handle part (21) is larger than the maximum diameter of the drill bit body (1), the diameter of the handle part (21) is D11, 1.9mm is larger than or equal to D11 and is smaller than or equal to 2.1mm, the diameter of the small end of the positioning table part (24) is D12, the diameter of the large end of the transition table part (22) is D14, an annular tool withdrawal groove (23) is arranged between the positioning table part (24) and the transition table part (22), the minimum diameter of the tool withdrawal groove (23) is D13, D13< D12 and D13< D14, the diameter of the large end of the frustum part (11) is D16, the distance between the minimum diameter of the tool withdrawal groove (23) and the large end of the frustum part (11) is L2, and 0.10 < (D13-D16)/L2 is less than or equal to 0.35.
2. The drilling tool as claimed in claim 1, characterized in that the length of the drilling body (1) is L3, 2.5mm ≦ L3 ≦ 6.7 mm; and/or the angle of the cone platform part (11) is alpha, and alpha is more than or equal to 2 degrees and less than or equal to 15 degrees.
3. The drilling tool according to claim 1, characterized in that the drilling body (1) further comprises a drilling portion (12), the drilling portion (12) is coaxially connected to one side of the small end of the frustum portion (11), the diameter of the drilling portion (12) is equal to the diameter of the small end of the frustum portion (11), the diameter of the drilling portion (12) is D17, 0.01mm ≦ D17 ≦ 0.6 mm.
4. A drilling tool according to claim 3, characterized in that the outer side wall of the drill portion (12) is provided with helical flutes in the axial direction.
5. The drilling tool according to claim 1, wherein the drilling body (1) further comprises a welding part (13), the welding part (13) is coaxially arranged at one side of the large end of the frustum part (11), the welding part (13) is in welding joint with the transition frustum part (22), the diameter of the welding surface of the welding part (13) and the transition frustum part (22) is D15, D15 and D358 mm, and D15 and D16 are both greater than or equal to D3526.
6. The drilling tool as claimed in claim 1, characterized in that the transition land (22) has a large end diameter D14, 1.2mm ≦ D14 ≦ 1.8 mm; and/or the angle of the cone angle of the transition bench part (22) is beta, and beta is more than or equal to 3 degrees and less than or equal to 6 degrees.
7. Drilling tool according to claim 1, characterized in that the length of the locating land portion (24) is L12 and the length of the relief groove (23) is L13, 0 < L12+ L13 ≦ 4 mm.
8. A method of designing a drilling tool, for designing a drilling tool according to any of claims 1-7, the method comprising the steps of:
s1, determining a plurality of parameter models, wherein each parameter model comprises a plurality of design parameters capable of determining the specific structure of the drilling tool;
s2, carrying out simulation on each parameter model to obtain a simulation result of each parameter model under the same working condition;
s3, obtaining a current optimal parameter model according to the comparison of the simulation results;
s4, trial-manufacturing a model sample based on the current optimal parameter model;
s5, processing a plurality of hole sites by adopting the model sample;
and S6, detecting the CPK value of each hole site, and if the CPK value of each hole site meets the requirements, confirming the final finished product according to the model sample.
9. The design method of claim 8, wherein in step S6, if there is at least one hole site whose CPK value does not meet the requirement, after eliminating the current optimal parametric model, the method returns to step S3.
10. The design method according to claim 8, wherein in the step S3, the simulation result is a deformation amount and/or a natural frequency of the model parameter obtained by simulation.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113878148A (en) * | 2021-10-28 | 2022-01-04 | 深圳市金洲精工科技股份有限公司 | Drilling tool and drilling tool design method |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11347819A (en) * | 1998-06-01 | 1999-12-21 | Hitachi Via Mechanics Ltd | Drill |
| TWM325884U (en) * | 2007-08-03 | 2008-01-21 | Topoint Technology Co Ltd | Improved structure of miniature drill |
| CN201102089Y (en) * | 2007-08-07 | 2008-08-20 | 尖点科技股份有限公司 | Improved structure of miniature drill |
| CN101733448A (en) * | 2008-11-21 | 2010-06-16 | 佑能工具株式会社 | Drilling tool and its making method |
| CN102198533A (en) * | 2010-03-25 | 2011-09-28 | 佑能工具株式会社 | Perforating tool |
| CN104625168A (en) * | 2013-11-11 | 2015-05-20 | 佑能工具株式会社 | Drilling tool and production method thereof |
| CN204893046U (en) * | 2015-07-15 | 2015-12-23 | 尖点科技股份有限公司 | Construction improvement of miniature drill bit |
| CN106825692A (en) * | 2016-12-27 | 2017-06-13 | 深圳市金洲精工科技股份有限公司 | The manufacture method of boring bar tool and boring bar tool |
| DE102019200496A1 (en) * | 2019-01-16 | 2020-07-16 | Busch & Co. Gmbh & Co. Kg | Tool for setting gemstones |
| CN211334615U (en) * | 2020-05-11 | 2020-08-25 | 汇专科技集团股份有限公司 | Amplitude transformer and ultrasonic welding device |
| CN217290565U (en) * | 2021-06-29 | 2022-08-26 | 深圳市金洲精工科技股份有限公司 | Drilling tool |
-
2021
- 2021-06-29 CN CN202110726681.XA patent/CN113210679A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11347819A (en) * | 1998-06-01 | 1999-12-21 | Hitachi Via Mechanics Ltd | Drill |
| TWM325884U (en) * | 2007-08-03 | 2008-01-21 | Topoint Technology Co Ltd | Improved structure of miniature drill |
| CN201102089Y (en) * | 2007-08-07 | 2008-08-20 | 尖点科技股份有限公司 | Improved structure of miniature drill |
| CN101733448A (en) * | 2008-11-21 | 2010-06-16 | 佑能工具株式会社 | Drilling tool and its making method |
| CN102198533A (en) * | 2010-03-25 | 2011-09-28 | 佑能工具株式会社 | Perforating tool |
| CN104625168A (en) * | 2013-11-11 | 2015-05-20 | 佑能工具株式会社 | Drilling tool and production method thereof |
| CN204893046U (en) * | 2015-07-15 | 2015-12-23 | 尖点科技股份有限公司 | Construction improvement of miniature drill bit |
| CN106825692A (en) * | 2016-12-27 | 2017-06-13 | 深圳市金洲精工科技股份有限公司 | The manufacture method of boring bar tool and boring bar tool |
| DE102019200496A1 (en) * | 2019-01-16 | 2020-07-16 | Busch & Co. Gmbh & Co. Kg | Tool for setting gemstones |
| CN211334615U (en) * | 2020-05-11 | 2020-08-25 | 汇专科技集团股份有限公司 | Amplitude transformer and ultrasonic welding device |
| CN217290565U (en) * | 2021-06-29 | 2022-08-26 | 深圳市金洲精工科技股份有限公司 | Drilling tool |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113878148A (en) * | 2021-10-28 | 2022-01-04 | 深圳市金洲精工科技股份有限公司 | Drilling tool and drilling tool design method |
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