Centrifugal disc for mineral fiber production device and method of determining position of hole thereon

Abstract

The present disclosure provides a centrifugal disc for a mineral fiber production device, having a side wall configured as a conical surface, the side wall being provided with a plurality of through holes configured in at least two rows in a circumferential direction of the side wall, wherein, at most 30 through holes in two adjacent rows of the through holes are aligned in a bus direction of the side wall The present disclosure also provides a method of determining a position of a through hole on the centrifugal disc, so as to reduce or eliminate alignment of the through holes. The present disclosure can reduce or eliminate the alignment between the through holes with different diameters and adjacent to each other in the bus direction in the perforated area of the centrifugal disc, thereby reducing the stress concentration of the through holes and improving the service life of the centrifugal disc.

Description

CENTRIFUGAL DISC FOR MINERAL FIBER PRODUCTION DEVICE AND METHOD OF DETERMINING POSITION OF HOLE THEREONRELATED FIELD

[0001] The present disclosure relates to a mineral fiber production device, and more particularly, to a centrifugal disc for a mineral fiber production device and a method of determining a position of a hole thereon.BACKGROUND

[0002] A common method for producing glass fibers or mineral fibers for thermal insulation applications is a combination of centrifugal drawing and air drawing.

[0003] An device used for the centrifugal drawing comprises a centrifugal disc 1, as shown in FIG. 1, with a side wall 5 having an inclination angle y with respect to the vertical direction, thereby the side wall is curved into a conical surface, called a lateral belt cylinder. The side wall 5 is provided with a plurality of through holes 9, the axes of which face the axis of the centrifugal disc. The through holes 9 are arranged in rows in the circumferential direction of the side wall 5, and the rows are arranged in a bus direction of the side wall, referring to FIG.2. The centrifugal disc 1 has a fixed flange 6 and a rotating shaft hole 8 through which a rotating shaft (not shown in the figures) passes and drives the centrifugal disc 1 to rotate.

[0004] During fiber production, the centrifuge disc is generally rotated at about 1,500 to 3,000 revolutions per minute. Under the centrifugal force, glass or molten rock is pushed outwards and through the holes to form fibers, and then placed down towards the bottom and drawn by a jet of hot gas.

[0005] Usually, the through holes 9 on the side wall 5 form belts with through holes having different diameters, referring to FIG. 2. Generally, if the diameters of through holes in two adjacent rows are the same, the positions of the through holes in the adjacent rows will be arranged in a staggered manner in the circumferential direction to avoid alignment of the through holes in the bus direction of the side wall. Such alignment can result in stress concentration and fatigue failure. However, for the adjacent rows between two belts, a simple axially staggered arrangement cannot avoid alignment between the through holes of the1NTD206061adjacent rows in the bus direction due to the different diameters of the through holes. In this case, it is not possible to avoid the occurrence of stress concentration.SUMMARY

[0006] The present disclosure aims to avoid or mitigate the stress concentration due to the alignment of the through holes in the bus direction.

[0007] To this end, in accordance with one aspect of the present disclosure, the present disclosure provides a centrifugal disc for a mineral fiber production device, having a side wall configured as a conical surface, the side wall being provided with a plurality of through holes configured in at least two rows in a circumferential direction of the side wall, wherein at most 30 through holes in two adjacent rows of the through holes are aligned in a bus direction of the side wall.

[0008] Wherein, in the same row, a pitch between the adjacent through holes is at least 150% of a diameter of the through holes, and less than or equal to 250% of the diameter of the through holes.

[0009] Wherein, a row distance between the two adjacent rows is 140% to 200% of a diameter of the through holes.

[0010] Wherein, a distribution density of the through holes in a perforated area on the side wall is 19 to 93 through holes per square centimeter.

[0011] In accordance with another aspect of the present disclosure, the present disclosure provides a method of determining a position of a hole, for determining positions of the through holes on the above centrifugal disc, the method comprising following steps:

[0012] a step 100, obtaining a row distance between adjacent first and second rows of through holes, a first through hole diameter of the first row of the through holes, and a second through hole diameter of the second row of the through holes, wherein the first through hole diameter is greater than the second through hole diameter;

[0013] a step 200, determining a circumferential deviation of a first starting position of the first row of the through holes and a second starting position of the second row of the through holes;

[0014] a step 300, determining a minimum hole spacing between the first row of the through2NTD206061holes and the second row of the through holes according to the following formula,

[0016] wherein i is the iththrough hole from the first starting position in the first row of the through holes, with an initial value of 1, j is the jththrough hole from the second starting position in the second row of the through holes, with an initial value of 1, pi is a first pitch of the first row of the through holes, with an initial value of 1.5di, di is the first through hole diameter, p2 is a second pitch of the second row of the through holes, with an initial value of 1.5d2, d2 is the second through hole diameter, poiris the circumferential deviation, with an initial value of zero, and D is the row distance;

[0017] a step 400, keeping pi and p2 unchanged, increasing poir in the following range, and repeating the step 300 for each value of poffto obtain a set {Tmin} of the corresponding minimum hole spacing Tmin,

[0018] 0 < poff< min p1,p2) (2)

[0019] a step 500, if a Tmin greater than the row distance exists, obtaining a maximum value rnax({Tmin}) in the set {Tmin}, and determining the positions of the through holes in the first and second rows according to the circumferential deviation poir, the first pitch pi and the second pitch p2 corresponding to the maximum value.

[0020] Wherein, the method of determining a position of a hole further comprises:

[0021] a step 600, if each Tmin is equal to the row distance, increasing pi and p2 in the following ranges, and repeating the steps 300 and 400 for each value of pi and p2 to obtain a set Tm n={{Tmin}m n} of the set {Tmin} of the minimum hole spacings, wherein, m is the mthvalue of pi and n is the nthvalue of p2,

[0022] l.Sdi < Pi < 2.5d 1.5d2< p2< 2.5d2,

[0023] a step 700, determining the position of each through hole in the first row of the through holes and the second row of the through holes according to the set

[0024] Wherein, the step 700 further comprises:

[0025] a step 710, when the minimum hole spacing Tmin in the set Tm, n is greater than the row distance, calculating the total number of the holes corresponding to the Tmin using the following3NTD206061formula according to the first diameter di, the second diameter d2, the first pitch pi, the second pitch p2, a perimeter Li of the first row, and a perimeter L2 of the second row;

[0026] N = ( ''(diL+1Pi .) + , (d2L+2p2Jy (3)7

[0027] a step 720, determining the position of the through holes according to the first diameter di, the second diameter d2, the first pitch pi, the second pitch p2, and the circumferential deviation poff corresponding to the maximum value of the total number of the holes N.

[0028] Wherein, the step 700 further comprises:

[0029] a step 740, when each minimum hole spacing in the set Tm, n is equal to the rowdistance, selecting the circumferential deviation, the first pitch and the second pitch corresponding to the minimum number of the through holes aligned in the bus direction, and determining the position of the through holes according to the circumferential deviation, the first pitch and the second pitch.

[0030] Wherein, the step 740 further comprises: removing some of the through holes with a smaller diameter from the through holes in the two adjacent rows aligned in the bus direction, such that the number of the aligned through holes does not exceed 30.

[0031] Further, in the step 400 or 600, pi, p2, and poff are increased successively according to a set stepping value.

[0032] In accordance with another aspect of the present disclosure, the present disclosure provides a computer device, comprising a memory, a processor and instructions stored on the memory and executable by the processor, wherein the processor implements the steps of the above method when executing the instructions.

[0033] In accordance with another aspect of the present disclosure, the present disclosure provides a manufacturing device capable of forming a through hole on a workpiece, wherein the manufacturing device comprises the above computing device.

[0034] In accordance with another aspect of the present disclosure, the present disclosure provides a computer-readable medium, on which executable instructions are stored, wherein the executable instructions are configured to allow a machine to perform the steps of the above method when being executed.4NTD206061

[0035] In accordance with another aspect of the present disclosure, the present disclosure provides a computer program product, comprising computer program instructions, wherein the computer program instructions implement the steps of the above method when being executed by a processor.

[0036] The present disclosure can eliminate or reduce the alignment between the through holes with different diameters and adjacent to each other in the bus direction in the perforated area of the side wall of the centrifugal disc, thereby reducing the stress concentration of the through holes and improving the service life of the centrifugal disc.BRIEF DESCRIPTION OF THE DRAWINGS

[0037] FIG. 1 is an axial sectional view of a centrifugal disc.

[0038] FIG. 2 is a view of a lateral belt cylinder.

[0039] FIG. 3 is a partial schematic view of adjacent rows of through holes with different diameters.DETAILED DESCRIPTION

[0040] The detailed description of the present disclosure is described below in connection with the drawings.

[0041] In this context, unless explicitly stated, the terms “first”, “second”, etc., do not indicate ordinal numbers, but are merely used to distinguish different features of a same type, e.g., a first diameter and a second diameter, a first pitch and a second pitch. In this application, “...th” is used to indicate an ordinal number.

[0042] The term “axial” refers to an orientation of a geometric axis of a shape. The term “circumferential” refers to a direction along a circumference. The term “bus direction” refers to a direction of a geometric bus of a conical surface curved from a side wall. The “row” of through holes refers to the circumference formed by the through holes at the center of the opening of the outer surface of the side wall 5. The “adjacent” rows of through holes refer to rows adjacent to each other in the bus direction. Adjacent through holes refer to, depending on the context, adjacent through holes within a same row, or through holes in proximity to each other between5NTD206061adjacent rows, referring to FIG. 3. The term “alignment” refers to the alignment of a connection line between the centers of two through holes in adjacent rows with the bus direction. Unless explicitly stated, the center or circle center of the through hole in the present disclosure refers to the center or circle center of the through hole in the opening of the outer surface of the side wall, and the described distance is the distance on the outer surface of the side wall.

[0043] In one embodiment, the present disclosure provides a centrifugal disc 1 for a mineral fiber production device, having a side wall 5 configured as a conical surface, the side wall 5 being provided with a plurality of through holes 9 configured in at least two rows in the circumferential direction of the side wall 5, wherein at most 30 through holes 9 in two adjacent rows of the through holes 9 are aligned in the bus direction of the side wall 5.

[0044] In the same row, the pitch is larger than or equal to 150% of the diameter of the through holes 5, and less than or equal to 250% of the diameter of the through holes 5. The pitch is the distance between the centers of two adjacent through holes in the same row, and with reference to pi and p2 in FIG. 3, it refers to the arc length between the centers of two adjacent through holes on the circumference formed by the centers of the through holes in this row.

[0045] The row distance between the two adjacent rows is 140% to 200% of the diameter of the through holes. The row distance is the distance between two circumferences formed by the centers of the two rows of the through holes in the bus direction, namely, the length of the line segment formed by the intersection points of the bus with the two circumferences.

[0046] The distribution density of the through holes in the perforated area on the side wall is 19 to 93 through holes per square centimeter. The perforated area refers to the area where the through holes are formed on the side wall. The axial direction of each of the through holes faces the axis of the centrifugal disc.

[0047] As described below in connection with FIG. 3, in accordance with an embodiment of the present disclosure, the present disclosure provides a method of determining a position of a hole, for determining the positions of the through holes on the above centrifugal disc, the method comprising the following steps:

[0048] A step 100, obtaining the row distance between the adjacent first and second rows of the through holes, the first through hole diameter of the first row of the through holes, and the6NTD206061second through hole diameter of the second row of the through holes, wherein the first through hole diameter is greater than the second through hole diameter.

[0049] A step 200, determining the circumferential deviation of the first starting position of the first row of the through holes and the second starting position of the second row of the through holes. The “starting position” refers to the position of the center of the first through hole in one row of the through holes on the side wall. The term “first” as used herein indicates an ordinal number. The starting position can be determined according to the specific application environment.

[0050] Referring to FIG. 3, the distance between the intersection point of the bus passing through the first starting position with the circumference of the second row of the through holes and the second starting position is the circumferential deviation. The circumferential deviation is zero when the respective first through holes of the first and second rows are aligned.

[0051] A step 300, determining a minimum hole spacing between the first row of the through holes and the second row of the through holes according to the following formula,

[0053] Wherein i is the iththrough hole from the first starting position in the first row of the through holes, with an initial value of 1. j is the jththrough hole from the second starting position in the second row of the through holes, with an initial value of 1. Here, i and j are used only as marks of order in the mathematical sense.

[0054] pi is the first pitch of the first row of the through holes, with an initial value of 1.5di. p2 is the second pitch of the second row of the through holes, with an initial value of 1.5d2. poir is the circumferential deviation, with an initial value of zero, and D is the row distance.

[0055] Referring to FIG. 3, the outer surface of the side wall is projected as a plane, and the circumferential deviation pij between the through hole i in the first row of the through holes and the nearest through hole j in the second row can be calculated as follows.

[0056] ptj = [(i - l)pi - (j - l)p2- poff]

[0057] The circumferential deviation pij, the row distance D and the hole spacing eij form a right triangle, and eij is calculated according to the side length theorem of triangle. The hole spacing7NTD206061is calculated for each hole in the first row of the through holes and in the second row of the through holes. The hole spacing is the distance between the centers of two through holes which are positioned in two adjacent rows, respectively. It can be found that eij is necessarily greater than or equal to the row distance D. If eij is greater than the row distance D, it indicates that the through hole i and the through hole j are not aligned, and if eij is equal to the row distance D, it indicates that the through hole i and the through hole j are aligned.

[0058] In all of the eij, the smallest value is taken to obtain Since the row distance D is setas a constant, eij is related to the value of poff when pi and p2 are fixed.

[0059] Thus, in a step 400, keeping pi and p2 unchanged, increasing poff in the following range, and repeating the step 300 for each value of poir to obtain a set {Tmin} of the corresponding minimum hole spacings Tmin,

[0060] 0 < poff< min p1,p2) (2)

[0061] The poff may be increased according to a preset stepping value, for example, it may be increased successively by a fixed length, e.g., 1 mm, or by a fixed proportion, e.g., 1 %.

[0062] A step 500, if a Tmin greater than the row distance exists, it indicates that the first row of the through holes and the second row of the through holes are not aligned under the current values of pi and p2 by adjusting poff.

[0063] As a result, the maximum value max {Tmin} in the set {Tmin} of the minimum hole spacings, that is, the maximum value of the minimum hole spacings, is obtained. Corresponding to the maximum value, the relative circumferential deviation of the first row of the through holes and the second row of the through holes is the greatest. Thus, the positions of the through holes in the first and second rows are determined according to the circumferential deviation poff, the first pitch pi and the second pitch p2 corresponding to the maximum value.

[0064] Further, a step 600, if each Tmin is equal to the row distance, it indicates that the alignment of the through holes cannot be avoided under the current values of pi and p2 by adjusting poff.

[0065] As a result, pi and p2 are increased in the following ranges, and the steps 300 and 400 are repeated for each value of pi and p2. For each value of pi and p2, a set of the minimum hole spacings {Tmin} can be obtained. Thus, when the values of pi and p2 are all calculated, a set n} of the set {Tmin} of the minimum hole spacings can be obtained, wherein m8NTD206061is the mthvalue of pi and n is the nthvalue of p2, and here, m and n are only used as marks of order in the mathematical sense.

[0068] The pi and p2 may be increased according to a preset stepping value, for example, it can be increased successively by a fixed length, e.g., 1 mm, or by a fixed proportion, e.g., 1 %. The stepping values for pi and p2 may be same or different.

[0069] Then, a step 700, determining the position of each through hole in the first row of the through holes and the second row of the through holes according to the set

[0070] Wherein, the step 700 further comprises:

[0071] a step 710, when the minimum hole spacing in the set Tm, n is greater than the rowdistance, that is, there is a case where all of the through holes are not aligned, calculating the total number of the holes corresponding to the Tmin using the following formula according to the first diameter di, the second diameter d2, the first pitch pi, the second pitch p2, the perimeter Li of the first row, and the perimeter L2 of the second row;

[0073] a step 720, determining the positions of the through holes according to the first diameter di, the second diameter d2, the first pitch pi, the second pitch p2, and the circumferential deviation poir corresponding to the maximum value of the total number of holes N. That is, if there are a plurality of solutions in which all of the through holes are not aligned, the solution with the largest total number of the holes is selected.

[0074] Further, a step 740, when the minimum hole spacing Tmin in the set Tm,n is equal to the row distance, that is, there is always the case of alignment of the through holes, the number of the aligned through holes is determined in the case where the minimum hole spacing Tmin is equal to the row distance D.

[0075] Further, the case with the minimum number of the aligned through holes is selected, and the positions of the through holes are determined according to the corresponding circumferential deviation poff, the first pitch pi and the second pitch p2.

[0076] Further, the through holes with a smaller diameter are removed from the two9NTD206061aligned through holes, such that the number of the aligned through holes does not exceed 30.

[0077] Another embodiment of the present disclosure provides a computer device comprising a memory, a processor and instructions stored on the memory and executable by the processor, wherein the processor implements the steps of the above method of determining a position of a hole when executing the instructions.

[0078] The computing device may be a device having computing capabilities, such as a computer. For example, it can be a hardware or specific circuit, software, firmware, logic, or any combination thereof. In some embodiments, the memory may be a portable computer disk, hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical storage device, magnetic storage device, cloud memory, or any suitable combination thereof. The processor may be a general purpose processor, digital signal processor (DSP), application specific integrated circuit (ASIC), field programmable gate array (FPGA) or any combination of other programmable logic device, discrete gate or transistor logic, discrete hardware components, etc. The general purpose processor may be a microprocessor, or the processor may be any common processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of a plurality of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, a combination of one or more microprocessors and a DSP core, or any other such structure.

[0079] Another embodiment of the present disclosure provides a manufacturing device capable of forming a through hole on a workpiece, wherein the manufacturing device comprises the above computing device.

[0080] Another embodiment of the present disclosure provides a computer-readable medium, on which executable instructions are stored, wherein the executable instructions are configured to allow a machine to perform the steps of the above method of heating a glass workpiece when being executed.

[0081] The computer-readable storage medium may be a tangible device that can hold and store instructions used by an instruction executing device. The computer-readable storage medium may be, for example, but not limited to, an electrical storage device, magnetic storage device, optical storage device, electromagnetic storage device, semiconductor storage device, or any10NTD206061suitable combination thereof. More specific examples (a non-exhaustive list) of the computer- readable storage medium include a portable computer disk, hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), portable compact disk read-only memory (CD-ROM), digital versatile disk (DVD), memory stick, soft disk, mechanical coding device, punch card or bump structure in a recess, e.g., having instructions stored thereon, and any suitable combination thereof. The computer-readable storage medium as used herein is not interpreted as a transient signal itself, such as radio wave or other freely propagating electromagnetic wave, electromagnetic wave propagated through waveguide or other transmission medium (e.g., optical pulse through a fiber optic cable), or electrical signal transmitted through a wire.

[0082] Another embodiment of the present disclosure provides a computer program product comprising computer program instructions, wherein the computer program instructions implement the steps of the above method when being executed by a processor.

[0083] The computer-readable program instructions described herein may be downloaded from a computer-readable storage medium to various computing / processing devices, or to an external computer or external storage device via a network, such as internet, local area network, wide area network, and / or wireless network. The network may include copper transmission cable, fiber optic transmission, wireless transmission, router, firewall, exchange board, gateway computer, and / or edge server. A network adapter card or network interface in each computing / processing device receives computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in the computer-readable storage medium in each computing / processing device.

[0084] The computer program instructions for implementing the operations of the present disclosure may be assembler instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, said programming languages including object-oriented programming languages, such as Smalltalk, Python, C++, etc., and conventional procedural programming languages, such as “C” languages or similar programming languages. The computer-readable11NTD206061program instructions may be executed entirely on a user's computer, partially on a user's computer, as a stand-alone software package, partially on a user's computer and partially on a remote computer, or entirely on a remote computer or server. In a case involving a remote computer, the remote computer may be connected to a user's computer via any kind of network, including local area network (LAN) or wide area network (WAN), or it may be connected to an external computer (e.g., connected via the Internet by using an Internet service provider). In some embodiments, an electronic circuit is customized by utilizing state information of computer-readable program instructions, for example a programmable logic circuit, a field programmable gate array (FPGA) or a programmable logic array (PLA), and the electronic circuit may execute computer-readable program instructions.

[0085] In the above description, the details of the technical solution of the present disclosure are stated. However, those skilled in the art will be able to understand that the present disclosure is not limited to the specific details listed in the above embodiments, but may vary within the scope defined by the claims.12NTD206061

Claims

CLAIMS1. A centrifugal disc for a mineral fiber production device, having a side wall configured as a conical surface, the side wall being provided with a plurality of through holes configured in at least two rows in a circumferential direction of the side wall, characterized in that, at most 30 through holes in two adjacent rows of the through holes are aligned in a bus direction of the side wall.

2. The centrifugal disc for a mineral fiber production device according to claim 1, characterized in that, in the same row, a pitch between the adjacent through holes is at least 150% of a diameter of the through holes, and less than or equal to 250% of the diameter of the through holes.

3. The centrifugal disc for a mineral fiber production device according to claim 1, characterized in that, a row distance between the two adjacent rows is 140% to 200% of a diameter of the through holes.

4. The centrifugal disc for a mineral fiber production device according to claim 1, characterized in that, a distribution density of the through holes in a perforated area on the side wall is 19 to 93 through holes per square centimeter.

5. A method of determining a position of a hole, for determining positions of the through holes on the centrifugal disc according to any one of claims 1 to 4, the method comprising following steps: a step 100, obtaining a row distance between adjacent first and second rows of the through holes, a first through hole diameter of the first row of the through holes, and a second through hole diameter of the second row of the through holes, wherein the first through hole diameter is greater than the second through hole diameter;13NTD206061a step 200, determining a circumferential deviation of a first starting position of the first row of the through holes and a second starting position of the second row of the through holes; a step 300, determining a minimum hole spacing between the first row of the through holes and the second row of the through holes according to the following formula,wherein i is the 1ththrough hole from the first starting position in the first row of the through holes, with an initial value of 1, j is the jththrough hole from the second starting position in the second row of the through holes, with an initial value of 1, pi is a first pitch of the first row of the through holes, with an initial value of 1.5di, di is the first through hole diameter, p2 is a second pitch of the second row of the through holes, with an initial value of 1.5d2, d2 is the second through hole diameter, poiris the circumferential deviation, with an initial value of zero, and D is the row distance; a step 400, keeping pi and p2 unchanged, increasing poir in the following range, and repeating the step 300 for each value of poffto obtain a set {Tmin} of the corresponding minimum hole spacings Tmin,0 < poff< mm(p1,p2) (2) a step 500, if a Tmin greater than the row distance exists, obtaining a maximum value max({Tmin}) in the set {Tmin}, and determining the positions of the through holes in the first and second rows according to the circumferential deviation poir, the first pitch pi and the second pitch p2 corresponding to the maximum value.

6. The method of determining a position of a hole according to claim 5, wherein, the method further comprises: a step 600, if each is equal to the row distance, increasing pi and p2 in the followingranges, and repeating the steps 300 and 400 for each value of pi and p2 to obtain a set n} of the set {Tmin} of the minimum hole spacings, wherein, m is the mthvalueof pi and n is the nthvalue of p2,14NTD206061a step 700, determining the position of each through hole in the first row of the through holes and the second row of the through holes according to the set7. The method of determining a position of a hole according to claim 6, wherein, the step 700 further comprises: a step 710, when the minimum hole spacing in the set Tm, n is greater than the rowdistance, calculating the total number of the holes corresponding to the Tmin using the following formula according to the first diameter di, the second diameter d2, the first pitch pi, the second pitch p2, a perimeter Li of the first row, and a perimeter L2 of the second row;a step 720, determining the positions of the through holes according to the first diameter di, the second diameter d2, the first pitch pi, the second pitch p2, and the circumferential deviation poff corresponding to the maximum value of the total number of the holes N.

8. The method of determining a position of a hole according to claim 7, wherein, the step 700 further comprises: a step 740, when each minimum hole spacing Tmin in the set Tm, n is equal to the row distance, selecting the circumferential deviation, the first pitch and the second pitch corresponding to the minimum number of the through holes aligned in the bus direction, and determining the positions of the through holes according to the circumferential deviation, the first pitch and the second pitch.

9. The method of determining a position of a hole according to claim 8, wherein, the step 740 further comprises: removing some of the through holes with a smaller diameter from the through holes in the two adjacent rows aligned in the bus direction, such that the number of the aligned through holes does not exceed 30.

10. The method of determining a position of a hole according to claim 6 or 7, wherein, in15NTD206061the step 400 or 600, pi, p2, and poff are increased successively according to a set stepping value.

11. A computer device, comprising a memory, a processor and instructions stored on the memory and executable by the processor, wherein the processor implements the steps of the method according to any one of claims 5 to 10 when executing the instructions.

12. A manufacturing device capable of forming a through hole on a workpiece, wherein the manufacturing device comprises the computing device according to claim 11.

13. A computer-readable medium, on which executable instructions are stored, wherein the executable instructions are configured to allow a machine to perform the steps of the method according to any one of claims 5 to 10 when being executed.

14. A computer program product, comprising computer program instructions, wherein the computer program instructions implement the steps of the method according to any one of claims 5 to 10 when being executed by a processor.16NTD206061

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