Perforating design and machining method and system for circumferential and transverse flow consistency of perforated roller with circulation performance

Abstract

The invention provides a circumferential and transverse flow consistency trepanning design and processing method and system for a perforated roller with circulation performance, and the method comprises the steps: constructing a minimum unit based on the theoretical pitch of two adjacent holes in collinear holes in the transverse direction and the theoretical pitch of two adjacent holes in collinear holes in the circumferential direction; obtaining the hole number of the minimum unit based on the total length of the spiral line of the horizontal lead angle in the minimum unit and the theoretical hole pitch; obtaining a minimum unit number calculation value of the circumference of the roller surface; based on the calculated value of the minimum unit number of the circumference of the roller surface, the actual pitch is obtained; the actual aperture ratio is obtained based on the theoretical aperture and the actual pitch; based on the hole number of the minimum unit, the actual value of the number of the circumferential minimum units, the actual hole opening rate and the actual hole opening diameter, a hole opening design scheme of the roller with the holes is obtained; and a three-dimensional model of the roller with the holes is constructed, and trepanning machining is completed. The accurate hole arrangement calculation method provided by the invention provides technical support for the whole-process automatic processing of the roller with holes.

Description

Technical Field

[0001] The invention belongs to the technical fields of fluid, machinery and light industrial machinery, and specifically relates to a hole opening design and processing method and system for a hole roller with flow performance and circumferential and lateral flow consistency. Background Art

[0002] In solid-liquid two-phase flow, in order to maintain a certain uniformity (solid-liquid mixing ratio) of the mixture in the flow direction, a cylindrical leveling roller with a rotating drive is added during the flow process. Because the rotation of the roller disturbs the flow in both the flow direction and the direction perpendicular to the flow direction (hereinafter referred to as "lateral"), the turbulence of the fluid is increased, making the solid-liquid mixture more evenly distributed. In terms of lateral disturbance, the hole opening method of this leveling roller is particularly important.

[0003] As for the hole-opening method, the existing technologies include chessboard-shaped hole arrangement, single spiral hole arrangement, and double spiral hole arrangement. The chessboard-shaped hole arrangement is simple and easy to arrange. However, the holes are evenly distributed in the circumferential direction and uneven in the axial direction (the sections with holes and without holes are obviously separated, resulting in strong fluidity in the porous part and weak fluidity in the non-porous part, making it difficult to achieve the ideal "lateral uniformity", and the uniformity effect is poor). Compared with the "chessboard-shaped hole arrangement", the single spiral hole arrangement is improved in the vertical direction and is the same in the horizontal (lateral) direction. The uniformity effect is slightly better than that of the chessboard-shaped hole arrangement, but there are still defects in the lateral uniformity effect. Especially when the opening rate is small, the hole spacing is large, and the hole diameter is small, the fluidity of the lateral empty area and the non-porous area is very different. Moreover, this single spiral line also has the problem that the line connecting the centers of each 3 adjacent holes is not an equilateral triangle. The double spiral hole arrangement not only has the advantages of the single spiral hole arrangement in the vertical direction, but also greatly improves the uniformity of the flow of the roller at different workstations in the (horizontal) lateral direction. However, there is currently no accurate method to calculate the double helix pore arrangement.

[0004] The current processing method is to print out the hole arrangement expansion diagram on the roller surface, wrap it on the roller surface, then determine the hole position, and then perform the drilling operation. However, this processing method has large errors and low precision during the marking process, and the drilling is manually operated, so the drilling position accuracy is poor. This method cannot be used for occasions with high precision requirements. Moreover, this method is manually operated throughout the process, which is inefficient, has a long processing cycle, and is costly. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a method and system for designing and processing holes for a roller with circulation performance and circumferential and lateral flow consistency. The present invention can achieve high-automation, high-precision, short-cycle and low-cost mechanical processing.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] A method for designing and processing holes for a perforated roller with flow performance and circumferential and lateral flow consistency, comprising the following steps:

[0008] Based on the theoretical opening rate and theoretical opening diameter of the holed roller, the theoretical hole spacing is obtained;

[0009] Based on the theoretical hole distance between two adjacent holes in the holes that are collinear in the transverse direction and the theoretical hole distance between two adjacent holes in the holes that are collinear in the circumferential direction, a minimum unit is constructed;

[0010] Based on the total length of the helical line with the horizontal rise angle in the minimum unit and the theoretical hole spacing, the number of holes in the minimum unit is obtained;

[0011] Based on the outer diameter of the cylindrical surface of the roller with holes and the theoretical hole spacing between two adjacent holes in the circumferential direction of the collinear holes, a calculated value of the minimum number of circumferential units of the roller surface is obtained; and based on the calculated value of the minimum number of circumferential units, an actual value of the minimum number of circumferential units is obtained;

[0012] Based on the calculated value of the minimum number of units on the roller surface circumference, the actual hole spacing is obtained;

[0013] Based on the theoretical opening hole diameter and the actual hole spacing, an actual opening ratio is obtained; and based on the actual opening ratio, an actual opening hole diameter is obtained;

[0014] Based on the number of holes in the minimum unit, the actual value of the number of the circumferential minimum units, the actual opening ratio and the actual opening diameter, a hole design scheme for circumferential and lateral flow consistency of the holed roller is obtained;

[0015] Based on the hole design scheme, a three-dimensional model of the holed roller is constructed to complete the hole processing of the holed roller with flow performance and circumferential and lateral flow consistency.

[0016] Preferably, the formula for obtaining the theoretical hole spacing is as follows:

[0017]

[0018] Where β represents the theoretical opening rate, d represents the theoretical opening diameter, and s represents the theoretical hole distance.

[0019] Preferably, the method for obtaining the minimum number of holes in a unit is:

[0020] Based on the theoretical hole distance between two adjacent holes in the horizontally collinear holes, the horizontal rise angle in the minimum unit is calculated by the cosine theorem;

[0021] Based on the cosine value of the horizontal rise angle in the minimum unit and the theoretical hole distance between two adjacent holes in the circumferentially collinear holes, the total length of the helix of the horizontal rise angle in the minimum unit is calculated;

[0022] The total length of the helical lines with horizontal rise angles in the minimum unit is divided by the theoretical hole spacing to obtain the number of holes in the minimum unit.

[0023] Preferably, the formula for obtaining the calculated value of the minimum number of circumferential units is as follows:

[0024]

[0025] In the formula, q represents the calculated value of the minimum number of circumferential units, D represents the outer diameter of the cylindrical surface of the roller with holes, cs represents the theoretical hole spacing between two adjacent holes in the circumferential direction of the collinear holes, θ represents the horizontal rise angle in the minimum unit, and a represents the number of theoretical hole spacing s.

[0026] Preferably, the opening design scheme includes:

[0027] For fully automatic CNC machining, a hole design scheme is selected in which the actual hole ratio and the theoretical hole ratio satisfy a preset hole ratio approaching threshold value and the actual hole diameter and the theoretical hole diameter satisfy a preset hole diameter approaching threshold value;

[0028] When the roller surface diameter meets the preset diameter threshold, the opening design scheme with the minimum number of cells and the minimum number of holes is selected;

[0029] For mechanical processing, the total number of rotations during processing is calculated based on the actual value of the minimum number of circular units and the number of holes in the minimum unit, and the hole opening design scheme with the minimum total number of rotations during processing is selected.

[0030] Preferably, the method for performing the hole opening process is:

[0031] Based on the theoretical hole distance between two adjacent holes in the holes that are collinear in the transverse direction, the pitch value is obtained;

[0032] Based on the pitch value and the outer diameter of the cylindrical surface, a first helix is ​​obtained;

[0033] Based on the starting point of the first spiral line and the reference plane where the starting point is located, a hole is opened at the starting point of the first spiral line, and the curve array is equally divided along the first spiral line and combined with the hole opening design scheme to obtain a three-dimensional model of the roller with holes;

[0034] Based on the three-dimensional model of the holed roller, automated processing of the circumferential and lateral flow consistency of the holed roller with flow performance is performed.

[0035] The present invention also provides a hole design and processing system for the circumferential and lateral flow consistency of a holed roller with flow performance, which is used to implement the method, comprising:

[0036] Theoretical hole spacing calculation module, used to obtain the theoretical hole spacing based on the theoretical opening rate and theoretical hole diameter of the holed roller;

[0037] A minimum unit construction module, used to construct a minimum unit based on a theoretical hole distance between two adjacent holes in the holes that are collinear in the transverse direction and a theoretical hole distance between two adjacent holes in the holes that are collinear in the circumferential direction;

[0038] A hole number calculation module for the minimum unit, used to obtain the hole number of the minimum unit based on the total length of the helix with a horizontal rise angle in the minimum unit and the theoretical hole spacing;

[0039] A module for calculating the number of minimum circumferential units is used to obtain a calculated value of the number of minimum circumferential units on the roller surface based on the outer diameter of the cylindrical surface of the roller with holes and the theoretical hole distance between two adjacent holes in the circumferential direction of the collinear holes; and to obtain an actual value of the number of minimum circumferential units based on the calculated value of the number of minimum circumferential units;

[0040] The actual hole spacing calculation module is used to obtain the actual hole spacing based on the calculated value of the minimum unit number of the roller surface circumference;

[0041] An actual opening aperture calculation module, used to obtain an actual opening ratio based on the theoretical opening aperture and the actual hole spacing; and to obtain an actual opening aperture based on the actual opening ratio;

[0042] A hole design scheme acquisition module is used to obtain a hole design scheme for circumferential and lateral flow consistency of a holed roller based on the number of holes in the minimum unit, the actual value of the number of the circumferential minimum units, the actual opening ratio and the actual opening aperture;

[0043] The processing module is used to construct a three-dimensional model of the hole roller based on the hole design scheme, and complete the hole processing of the hole roller with flow performance and circumferential and lateral flow consistency.

[0044] Preferably, the minimum unit hole number calculation module includes:

[0045] A horizontal rise angle calculation unit is used to calculate the horizontal rise angle in the minimum unit by the cosine theorem based on the theoretical hole distance between two adjacent holes in the holes that are collinear in the transverse direction;

[0046] A helical line total length calculation unit, used to calculate the total length of the helical line with the horizontal rise angle in the minimum unit based on the cosine value of the horizontal rise angle in the minimum unit and the theoretical hole distance between two adjacent holes in the circumferentially collinear holes;

[0047] The hole number calculation unit of the minimum unit is used to divide the total length of the spiral line of the horizontal rise angle in the minimum unit by the theoretical hole distance to obtain the hole number of the minimum unit.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] 1. The present invention obtains the hole design scheme by calculating the double helix hole arrangement accurately (precisely);

[0050] 2. The design scheme of the present invention can realize fully automatic machining, and realize highly automated, high-precision, short-cycle, and low-cost machining.

[0051] 3. The present invention can be used not only for processing holed rollers in the papermaking industry, but also for high-precision design and precise processing and manufacturing of all holed rollers (this type of roller has high requirements on the uniformity of axial and axial (lateral) flow of fluid, especially solid-liquid two-phase flow). BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0053] Figure 1 A flow chart of a method for designing and processing holes for circumferential and lateral flow consistency of a holed roller with flow performance according to an embodiment of the present invention;

[0054] Figure 2 A schematic diagram showing the smallest unit of an embodiment of the present invention;

[0055] Figure 3 A schematic diagram of calculating the horizontal elevation angle according to an embodiment of the present invention;

[0056] Figure 4 A schematic diagram of solving parameters a and b in an embodiment of the present invention;

[0057] Figure 5 A schematic diagram of calculating the number of holes of the minimum unit according to an embodiment of the present invention;

[0058] Figure 6 This is a schematic diagram of theoretical hole spacing design according to an embodiment of the present invention;

[0059] Figure 7 A schematic diagram of the calculation value of the minimum number of circumferential units according to an embodiment of the present invention;

[0060] Figure 8 A schematic diagram of hole arrangement according to a design scheme in an embodiment of the present invention;

[0061] Fig. 9 A schematic diagram of the original spiral line and the number of arrays when modeling an embodiment of the present invention;

[0062] Fig.10 This is a schematic diagram of pitch calculation according to an embodiment of the present invention;

[0063] Fig.11A schematic diagram of the starting point of a spiral line and the reference plane where the starting point is located in an embodiment of the present invention;

[0064] Fig.12 Schematic diagram of the three-dimensional model of the perforated roller constructed according to an embodiment of the present invention. DETAILED DESCRIPTION

[0065] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0066] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0067] Embodiment 1

[0068] A method for designing and processing holes for a perforated roller with flow performance and circumferential and lateral flow consistency, comprising the following steps:

[0069] S1: Based on the theoretical opening rate and theoretical opening diameter of the hole roller, the theoretical hole spacing is obtained; Figure 6 As shown, a further implementation method is that the formula for obtaining the theoretical hole distance is as follows:

[0070]

[0071] Where β represents the theoretical opening rate, d represents the theoretical opening diameter, and s represents the theoretical hole distance.

[0072] S2: constructing a minimum unit based on the theoretical hole distance between two adjacent holes in the holes that are collinear in the transverse direction and the theoretical hole distance between two adjacent holes in the holes that are collinear in the circumferential direction;

[0073] like Figure 2 As shown, Figure 2 The "cs" direction is the circumferential direction, and the "ks" direction is the axial direction (transverse). Multiple holes can be processed at the same workstation, and the designed solution can accurately overlap the edge joints of the unfolded surface on the cylindrical surface (that is, 360° of the roller surface is included in this design solution). This requires that the line connecting the centers of the two holes corresponding to "ks" in the figure must be vertical ("ks" are two adjacent holes in the axial direction of the holes), and the line connecting the centers of the two holes corresponding to "cs" must be horizontal ("cs" are two adjacent holes in the circumferential direction of the holes). From Figure 2It can be seen from the figure that "ks×cs" constitutes a minimum unit, which can just cover any cylindrical surface. Therefore, the circumferential direction of the roller surface must be an integer number of minimum units to just cover the cylindrical surface.

[0074] S3: Based on the total length of the helix with a horizontal rise angle in the minimum unit and the theoretical hole spacing, the number of holes in the minimum unit is obtained; a further implementation method is that the method for obtaining the number of holes in the minimum unit is:

[0075] S31: Based on the theoretical hole distance between two adjacent holes in the horizontal direction that are collinear, the horizontal rise angle in the minimum unit is calculated by the cosine theorem;

[0076] S32: Calculate the total length of the helix of the horizontal rise angle in the minimum unit based on the cosine value of the horizontal rise angle in the minimum unit and the theoretical hole distance between two adjacent holes in the circumferentially collinear holes;

[0077] S33: Divide the total length of the spiral line with the horizontal rise angle in the minimum unit by the theoretical hole spacing to obtain the number of holes in the minimum unit.

[0078] Specifically, in this embodiment, m and n are initially given (m and n both represent the number of theoretical hole spacings), and the theoretical hole spacing is s

[0079] ① Calculate the horizontal rise angle θ

[0080] Assume the horizontal rise angle θ, the hole spacing is the same, and the spacing is marked as follows Figure 3 .

[0081] Law of Cosines:

[0082]

[0083] Get k 2 =m 2 +n 2 -mn

[0084]

[0085] get

[0086] That is to say, for given m and n, there is a unique horizontal lift angle θ corresponding to it.

[0087] Note: The horizontal rise angle θ and the horizontal rise angle 30°-θ are the relationship between horizontal placement and vertical placement. As can be seen from the above figure, the horizontal rise angle 30°-θ can be obtained by rotating and symmetric the horizontal rise angle θ.

[0088] ②Determine the value of n

[0089] Since θ<30°,

[0090] Take Therefore

[0091] Obtain:

[0092] Also, since both m and n are integers, so are relatively prime and (If m and n can be reduced, then there must be a figure composed of the reduced numbers that also satisfies the calculation. Here, the smallest opening unit is calculated, so m and n can only be relatively prime).

[0093] ③Find a and b (where a < b, and a and b both represent the number of theoretical hole pitches s)

[0094] As Figure 4 shown, the sine theorem:

[0095] Obtain

[0096] Similar to m and n, both a and b are integers, so are relatively prime (If a and b can be reduced, then there must be a figure composed of the reduced numbers that also satisfies the calculation. Here, the smallest opening unit is calculated, so a and b can only be relatively prime).

[0097] Note: The calculation result of can be displayed as an improper fraction (simplest fraction) in Excel, and then the numerator and denominator can be extracted separately using formulas to obtain the values of a and b.

[0098] ④Calculate the number of holes p in the smallest unit

[0099] Obtained from the previous calculation c represents the number of theoretical hole pitches s collinear in the circumferential direction.

[0100] Figure 5 In: ("es" is the length of the diagonal line in the figure, which is e times the hole pitch s);

[0101] The total length of the spiral line of the minimum unit's horizontal elevation angle θ is:

[0102] Among them, the number of holes in the smallest unit:

[0103] ⑤Calculate the final values according to the design parameters (m, n, actual aperture d', actual hole pitch s')

[0104] According to the above calculations, after m and n are given, θ, k, c, a, b, and p are all uniquely determined, as shown in Table 1.

[0105] Table 1

[0106]

[0107]

[0108] S4: Based on the outer diameter of the cylindrical surface of the roller with holes and the theoretical hole spacing between two adjacent holes in the circumferential direction of the collinear holes, a calculated value of the minimum number of circumferential units of the roller surface is obtained; and based on the calculated value of the minimum number of circumferential units, an actual value of the minimum number of circumferential units is obtained; a further implementation method is that the formula for obtaining the calculated value of the minimum number of circumferential units is as follows:

[0109]

[0110] In the formula, q represents the calculated value of the minimum number of circumferential units, D represents the outer diameter of the cylindrical surface of the roller with holes, cs represents the theoretical hole spacing between two adjacent holes in the circumferential direction of the collinear holes, θ represents the horizontal rise angle in the minimum unit, and a represents the number of theoretical hole spacing s.

[0111] The theoretically calculated q is usually not an integer, but what is actually needed is a complete minimum unit, so q must be rounded. When calculating, q is rounded up or down (generally rounded up to the nearest integer) to obtain the actual required "actual value q' of the minimum number of circumference units".

[0112] S5: based on the calculated value of the minimum number of units on the roller surface circumference, the actual hole spacing is obtained;

[0113] In this embodiment, The actual hole distance s' can be obtained by back-calculating s.

[0114] get

[0115] S6: based on the theoretical opening aperture diameter and the actual hole spacing, obtaining the actual opening ratio; and based on the actual opening ratio, obtaining the actual opening aperture diameter;

[0116] In this embodiment, according to the formula The actual porosity β' corresponding to a given d' can be calculated. For the convenience of calculation, the initial value of d' is taken as the same value as the designed aperture d. The value of d' here is adjusted according to the calculated actual porosity β'. When β' is close to β and the deviation is acceptable, d' at this time is the actual aperture required.

[0117] For different m and n, the obtained d' value may be inconsistent with the designed value, or there may be differences.

[0118] At this point, select one from various options that has an acceptable porosity deviation and consistent or similar pore sizes.

[0119] S7: Based on the number of holes in the minimum unit, the actual value of the number of the minimum units on the circumference, the actual opening ratio and the actual opening diameter, the opening design scheme for the circumferential and lateral flow consistency of the perforated roller is obtained;

[0120] In a further embodiment, the hole design includes:

[0121] For fully automatic CNC machining, a hole design scheme is selected in which the actual hole ratio and the theoretical hole ratio meet the preset hole ratio approaching threshold value and the actual hole diameter and the theoretical hole diameter meet the preset hole diameter approaching threshold value;

[0122] When the roller surface diameter meets the preset diameter threshold, the hole opening design scheme with the smallest number of minimum units is selected; specifically, from a macroscopic point of view, for the roller diameter and length given during design, the surface area of ​​the roller surface is determined. Since the opening ratio is basically the same (given by the design requirements, with only slight changes in different schemes), the scheme with a smaller number of holes in the smallest unit contains more minimum units, and the holes on the roller surface corresponding to each smallest unit have exactly the same irregular arrangement, so their fluidity is the same. Therefore, when the roller surface diameter is large enough, the scheme with the smallest number of holes in the smallest number of minimum units is selected, and the flow uniformity is better.

[0123] For mechanical processing, the total number of rotations during processing is calculated based on the actual value of the number of minimum circumferential units and the number of holes in the minimum unit, and the hole opening design scheme with the minimum total number of rotations during processing is selected. Specifically, the total number of rotations during processing = the number of minimum circumferential units (actual value) q'×the number of holes in the minimum unit p, so when selecting a scheme, in order to reduce the number of rotations during processing (the number of different workstations), it is recommended to select a scheme with a smaller total number of rotations during processing q'×p. If fully automatic CNC processing is used, the requirements for the number of rotations are not high (because the servo motor can accurately control the angle and the accuracy is very high), then select the scheme with d' and β' closest to the design value.

[0124] (1) Example 1 of the scheme calculation table

[0125] It can be seen from Table 2 and Table 3 that in this design case, all schemes are suitable for the design value of the aperture. When the value of m is too large, the number of rotations is large, which is not advisable for actual processing. Therefore, a larger value of m can be taken according to the actual situation according to the above calculation method. In the example, only 9 is taken.

[0126] Table 2

[0127]

[0128] Table 3

[0129]

[0130]

[0131] (2) Example 2 of the scheme calculation table

[0132] It can be seen from Tables 4 and 5 that in this design case, various schemes need to select different aperture values ​​in order to meet the opening rate.

[0133] Table 4

[0134]

[0135] Table 5

[0136]

[0137]

[0138]

[0139] t1 represents the number of minimum units in the circumferential direction, and t2 represents the number of minimum units in the lateral direction.

[0140] S8: Based on the hole design scheme, a three-dimensional model of the holed roller is constructed to complete the hole processing of the holed roller with flow performance and circumferential and lateral flow consistency.

[0141] From the data in the above table, we can see that the smaller the number of holes in the minimum unit, the smaller the number of rotations during processing, and the more holes can be processed at the same station. For occasions with low degree of automated processing, this type of solution is preferred to reduce the number of clamping times of the workpiece, such as the use of indexing plates and radial drills for processing (this solution is mostly to print out the hole arrangement expansion diagram on the roller surface, wrap it on the roller surface, and then determine the empty position before drilling). However, this processing method has large errors and low precision during the marking process, and the drilling machine is operated, and the drilling position accuracy is also affected. For occasions with high precision requirements, this method cannot be used. Moreover, this method is operated throughout the process, with low efficiency, long processing cycle and high cost.

[0142] In addition, the more holes are processed at the same station, the more favorable it is to use multi-hole drilling. The present invention accurately calculates the number of times (number of stations) selected in each scheme during roller processing, as well as the position of the starting drill bit at each station and the distance between adjacent drilling positions at the same station (that is, the distance between adjacent drill bits of the multi-hole drill), so it is suitable for multi-hole drilling processing, and if the multi-hole drill can automatically adjust the position of the end drill bit, it can easily realize automated processing.

[0143] For occasions with a high degree of automation, such as a servo motor-driven indexing plate, the rotation angle can be accurately controlled. When drilling with a gantry milling machine or a machining center, the empty position can be accurately determined, so that fully automatic processing can be achieved without the need to mark and drill holes, greatly reducing the processing cycle and processing costs. Due to the advancement of current technology, for some metal rollers, a laser cutting machine with CNC can be directly used to achieve fully automatic hole cutting, and the requirements for the hole diameter are further reduced (because it is not limited by the standard diameter of the drill bit). In addition, laser cutting is a non-contact processing. During processing, the roller surface is not subjected to pressure, the roller deformation is small, and the speed of cutting holes is much faster than drilling. Minimizing the processing cost also minimizes the deformation of the roller surface caused by the processing.

[0144] In summary, the present invention solves the design of different drilling schemes, solves the problem of design accuracy and processing accuracy of this type of roller, and solves the problem of transition from traditional manual marking and drilling processing technology to automated processing.

[0145] Specifically, the processing idea of ​​the present invention is to process multiple holes at the same station.

[0146] This method is applicable to the processing methods of gantry milling, machining center, multi-hole drilling, and laser cutting. With the number of rotations, the rotation angle is determined. With the model, the position of each hole can be accurately located and the program can be used for processing directly. Fig. 9 It can be seen that the number of original spiral roots during modeling is a, and the number of arrays is the number of minimum circular units (actual value) q'.

[0147] A further embodiment is that the method for performing the hole opening process is:

[0148] Based on the theoretical hole distance between two adjacent holes in the holes that are collinear in the transverse direction, the pitch value is obtained;

[0149] Specifically, let t2×ks be the pitch.

[0150] from Fig.10 Known: t1 and t2 are coprime integers.

[0151] Simplified

[0152] Note: The calculation result can be displayed as a false fraction (simplest fraction) using Excel, and then the numerator and denominator can be extracted using the formula to obtain the values ​​of t1 and t2, where t1 represents the number of minimum units in the circumferential direction, and t2 represents the number of minimum units in the lateral direction.

[0153] Based on the pitch value and the outer diameter of the cylinder, the first helix is ​​obtained;

[0154] Based on the starting point of the first spiral line and the reference plane where the starting point is located, a hole is opened at the starting point of the first spiral line, and the curve array is equally divided along the first spiral line and combined with the hole opening design scheme to obtain a three-dimensional model of the roller with holes;

[0155] Specifically, the first spiral with holes:

[0156] With the pitch, the first helix is ​​drawn according to the outer diameter of the cylinder and the pitch. Drill holes at the starting point of the helix and add the number of holes. Divide the curve array equally along the spiral line, and then design all the holes of the axial array of the roller length based on the design plan until the roller length is covered, so that the spiral line with holes is drawn.

[0157] Other spiral wires with holes:

[0158] The key to drawing a spiral with holes is to find the starting point of the spiral and the reference plane where the starting point is located.

[0159] like Fig.11 , find the starting point position:

[0160]

[0161] Find the reference plane position:

[0162]

[0163] According to Δx, the angle γ between the remaining (a-1) reference planes can be obtained.

[0164]

[0165] With the reference plane and starting point, the modeling method is the same as the method of drawing the first spiral line with a hole.

[0166] With the initial a spiral lines with holes, the a spiral lines with holes are arrayed q times (where q is the calculated value of the minimum number of circular units), and a pitch model is established. The number of pitches is set according to the length of the cylindrical surface, and the complete measurement model is designed. Note: During processing, the length of 2-5 holes is often added to the design length, and finally the two ends are cut off according to the required length.

[0167] Based on the three-dimensional model of the hole roller, the circumferential and lateral flow consistency of the hole roller with flow performance is automatically processed. According to the three-dimensional model of the hole roller and the parameters in its establishment process, programming can be performed to realize automatic processing. Fig.12 shown.

[0168] On the other hand, the present invention also provides a hole design and processing system for the circumferential and lateral flow consistency of a holed roller with flow performance, which is used to achieve the method, including:

[0169] Theoretical hole spacing calculation module, used to obtain the theoretical hole spacing based on the theoretical opening rate and theoretical hole diameter of the holed roller;

[0170] A minimum unit construction module, used to construct a minimum unit based on a theoretical hole distance between two adjacent holes in the holes that are collinear in the transverse direction and a theoretical hole distance between two adjacent holes in the holes that are collinear in the circumferential direction;

[0171] The hole number calculation module of the minimum unit is used to obtain the hole number of the minimum unit based on the total length of the helix with horizontal rise angle in the minimum unit and the theoretical hole spacing;

[0172] The module for calculating the minimum number of circumferential units is used to obtain the calculated value of the minimum number of circumferential units of the roller surface based on the outer diameter of the cylindrical surface of the roller with holes and the theoretical hole distance between two adjacent holes in the circumferential direction of the collinear holes; and to obtain the actual value of the minimum number of circumferential units based on the calculated value of the minimum number of circumferential units;

[0173] The actual hole spacing calculation module is used to obtain the actual hole spacing based on the calculated value of the minimum unit number of the roller surface circumference;

[0174] The actual opening aperture calculation module is used to obtain the actual opening ratio based on the theoretical opening aperture and the actual hole spacing; and to obtain the actual opening aperture based on the actual opening ratio;

[0175] The hole design scheme acquisition module is used to obtain the hole design scheme of the hole roller with circumferential and lateral flow consistency based on the number of holes in the minimum unit, the actual value of the number of the minimum units on the circumference, the actual opening ratio and the actual hole diameter;

[0176] The processing module is used to construct a three-dimensional model of a holed roller based on the hole design scheme, and complete the hole processing of the holed roller with flow performance and circumferential and lateral flow consistency.

[0177] A further implementation method is that the hole number calculation module of the minimum unit includes:

[0178] A horizontal rise angle calculation unit is used to calculate the horizontal rise angle in the minimum unit by the cosine theorem based on the theoretical hole distance between two adjacent holes in the holes that are collinear in the transverse direction;

[0179] A helical line total length calculation unit is used to calculate the total length of the helical line with the horizontal rise angle in the minimum unit based on the cosine value of the horizontal rise angle in the minimum unit and the theoretical hole distance between two adjacent holes in the circumferentially collinear holes;

[0180] The hole number calculation unit of the minimum unit is used to divide the total length of the spiral line with the horizontal rise angle in the minimum unit by the theoretical hole spacing to obtain the hole number of the minimum unit.

[0181] The embodiments described above are only descriptions of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A hole design and processing method for the circumferential and lateral flow consistency of a holed roller with flow performance, characterized in that: The following steps are involved: Based on the theoretical opening rate and theoretical opening diameter of the holed roller, the theoretical hole spacing is obtained; Based on the theoretical hole distance between two adjacent holes in the holes that are collinear in the transverse direction and the theoretical hole distance between two adjacent holes in the holes that are collinear in the circumferential direction, a minimum unit is constructed; Based on the total length of the helix with a horizontal rise angle in the minimum unit and the theoretical hole spacing, the number of holes in the minimum unit is obtained; Based on the outer diameter of the cylindrical surface of the roller with holes and the theoretical hole spacing between two adjacent holes in the circumferential direction of the collinear holes, a calculated value of the minimum number of circumferential units of the roller surface is obtained; and based on the calculated value of the minimum number of circumferential units, an actual value of the minimum number of circumferential units is obtained; Based on the calculated value of the minimum number of units on the roller surface circumference, the actual hole spacing is obtained; Based on the theoretical opening hole diameter and the actual hole spacing, an actual opening ratio is obtained; and based on the actual opening ratio, an actual opening hole diameter is obtained; Based on the number of holes in the minimum unit, the actual value of the number of the circumferential minimum units, the actual opening ratio and the actual opening diameter, a hole design scheme for circumferential and lateral flow consistency of the holed roller is obtained; Based on the hole design scheme, a three-dimensional model of the holed roller is constructed to complete the hole processing of the holed roller with flow performance and circumferential and lateral flow consistency.

2. The hole design and processing method for the circumferential and lateral flow consistency of the holed roller with flow performance according to claim 1, characterized in that: The formula for obtaining the theoretical hole distance is as follows: Where β represents the theoretical opening rate, d represents the theoretical opening diameter, and s represents the theoretical hole distance.

3. The hole design and processing method for the circumferential and lateral flow consistency of the holed roller with flow performance according to claim 1, characterized in that: The method to obtain the minimum number of holes in the unit is: Based on the theoretical hole distance between two adjacent holes in the horizontally collinear holes, the horizontal rise angle in the minimum unit is calculated by the cosine theorem; Based on the cosine value of the horizontal rise angle in the minimum unit and the theoretical hole distance between two adjacent holes in the circumferentially collinear holes, the total length of the helix of the horizontal rise angle in the minimum unit is calculated; The total length of the helical lines with horizontal rise angles in the minimum unit is divided by the theoretical hole spacing to obtain the number of holes in the minimum unit.

4. The hole design and processing method for the circumferential and lateral flow consistency of the holed roller with flow performance according to claim 1, characterized in that: The formula for obtaining the minimum number of circular units is as follows: In the formula, q represents the calculated value of the minimum number of circumferential units, D represents the outer diameter of the cylindrical surface of the roller with holes, cs represents the theoretical hole spacing between two adjacent holes in the circumferential direction of the collinear holes, θ represents the horizontal rise angle in the minimum unit, and a represents the number of theoretical hole spacing s.

5. The hole design and processing method for the circumferential and lateral flow consistency of the holed roller with flow performance according to claim 1, characterized in that: The opening design scheme includes: For fully automatic CNC machining, a hole design scheme is selected in which the actual hole ratio and the theoretical hole ratio satisfy a preset hole ratio approaching threshold value and the actual hole diameter and the theoretical hole diameter satisfy a preset hole diameter approaching threshold value; When the roller surface diameter meets the preset diameter threshold, the opening design scheme with the minimum number of cells and the minimum number of holes is selected; For mechanical processing, the total number of rotations during processing is calculated based on the actual value of the minimum number of circular units and the number of holes in the minimum unit, and the hole opening design scheme with the minimum total number of rotations during processing is selected.

6. The method for designing and processing holes for the circumferential and lateral flow consistency of a perforated roller with flow performance according to claim 1, characterized in that: The method of hole opening is: Based on the theoretical hole distance between two adjacent holes in the holes that are collinear in the transverse direction, the pitch value is obtained; Based on the pitch value and the outer diameter of the cylindrical surface, a first helix is ​​obtained; Based on the starting point of the first spiral line and the reference plane where the starting point is located, a hole is opened at the starting point of the first spiral line, and the curve array is equally divided along the first spiral line and combined with the hole opening design scheme to obtain a three-dimensional model of the roller with holes; Based on the three-dimensional model of the holed roller, automated processing of the circumferential and lateral flow consistency of the holed roller with flow performance is performed.

7. A hole design and processing system for the circumferential and lateral flow consistency of a holed roller with flow performance, used to implement the method according to any one of claims 1 to 6, characterized in that: include: Theoretical hole spacing calculation module, used to obtain the theoretical hole spacing based on the theoretical opening rate and theoretical hole diameter of the holed roller; A minimum unit construction module, used to construct a minimum unit based on a theoretical hole distance between two adjacent holes in the holes that are collinear in the transverse direction and a theoretical hole distance between two adjacent holes in the holes that are collinear in the circumferential direction; A hole number calculation module for the minimum unit, used to obtain the hole number of the minimum unit based on the total length of the helix with a horizontal rise angle in the minimum unit and the theoretical hole spacing; A module for calculating the number of minimum circumferential units is used to obtain a calculated value of the number of minimum circumferential units on the roller surface based on the outer diameter of the cylindrical surface of the roller with holes and the theoretical hole distance between two adjacent holes in the circumferential direction of the collinear holes; and to obtain an actual value of the number of minimum circumferential units based on the calculated value of the number of minimum circumferential units; The actual hole spacing calculation module is used to obtain the actual hole spacing based on the calculated value of the minimum unit number of the roller surface circumference; An actual opening aperture calculation module, used to obtain an actual opening ratio based on the theoretical opening aperture and the actual hole spacing; and to obtain an actual opening aperture based on the actual opening ratio; A hole design scheme acquisition module is used to obtain a hole design scheme for circumferential and lateral flow consistency of a holed roller based on the number of holes in the minimum unit, the actual value of the number of the circumferential minimum units, the actual opening ratio and the actual opening aperture; The processing module is used to construct a three-dimensional model of the hole roller based on the hole design scheme, and complete the hole processing of the hole roller with flow performance and circumferential and lateral flow consistency.

8. The hole design and processing system for the circumferential and lateral flow consistency of the holed roller with flow performance according to claim 7, characterized in that: The minimum unit hole number calculation module includes: A horizontal rise angle calculation unit is used to calculate the horizontal rise angle in the minimum unit by the cosine theorem based on the theoretical hole distance between two adjacent holes in the holes that are collinear in the transverse direction; A helical line total length calculation unit, used to calculate the total length of the helical line with the horizontal rise angle in the minimum unit based on the cosine value of the horizontal rise angle in the minimum unit and the theoretical hole distance between two adjacent holes in the circumferentially collinear holes; The hole number calculation unit of the minimum unit is used to divide the total length of the spiral line of the horizontal rise angle in the minimum unit by the theoretical hole distance to obtain the hole number of the minimum unit.

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