A method and system for automatically controlling a wire arranging guide wheel for correcting a diamond wire

Abstract

The application discloses a kind of for diamond wire deviation correction and line guide wheel automatic control method and system, comprising: obtaining the winding layer number m on pay-off reel, and according to winding layer number m obtains the deflection amount P1 of pay-off reel cabin diamond wire to pay-off line guide wheel;According to deflection amount P1 obtains the angle θ of pay-off line guide wheel rotation m, and based on deflection period, the servo motor in pay-off reel cabin controls pay-off line guide wheel;Obtain the winding layer number n on take-up reel, and according to winding layer number n obtains the deflection amount P2 of take-up reel cabin diamond wire to take-up line guide wheel;According to deflection amount P2 obtains the angle θ of take-up line guide wheel rotation n, and based on deflection period, the servo motor in take-up reel cabin controls take-up line guide wheel;If in the process of paying off and paying in, diamond wire breaks and recovers after paying off and paying in, then execute broken wire automatic control step.The application reaches to eliminate or reduce the probability that line guide wheel is deflected and worn in use cycle.

Description

Technical Field

[0001] This invention relates to the field of diamond wire cutting technology, specifically to an automatic control method and system for diamond wire guide rollers used for wire deviation correction. Background Technology

[0002] Working principle of the slicing machine: The slicing machine is divided into a feeding chamber, a take-up chamber, and a processing chamber. The processing chamber has a left main roller, a right main roller, and a lower main roller. The main rollers have many sets of wire grooves. The diamond wire is laid in a right-hand spiral pattern by staggering the wires on different main roller grooves. The forward and reverse rotation of the feeding and take-up reels achieves forward and reverse cutting of the silicon rod. The diamond wire on the feeding and take-up reels is redirected by wire guide rollers, achieving a closed-loop connection with the wire mesh on the main rollers.

[0003] Currently, existing wire guide rollers in the industry are mounted on ball bearings, and these rollers guide the diamond wire winding from the take-up and unwinding reels. The wire winding device, containing the guide rollers, uses the principle of gravity balance to ensure that the diamond wire passing through the V-groove of the guide roller is perpendicular to the fully wound take-up and unwinding reels. The friction between the guide roller and the V-groove controls the acceleration and deceleration of the guide roller, ensuring it moves synchronously with the bearing at the same angular velocity. During this process, if... Figure 1 As shown, as the amount of diamond wire on the take-up and pay-off spool increases or decreases compared to the initial state, the diamond wire on the take-up and pay-off spool is no longer perpendicular to the take-up and pay-off spool. At the same time, the diamond wire no longer coincides with the V-groove of the wire guide wheel. It will be biased towards a certain inclined side of the V-groove and exert a force on the inclined side of the V-groove.

[0004] When the amount of diamond wire on the take-up and release spool decreases or increases, the wire guide wheel in the take-up and release compartment will be worn unevenly by the offset diamond wire, which will accelerate the wear rate between the diamond wire and the wire guide wheel, and thus greatly shorten the service life of the wire guide wheel. At the same time, the increased mechanical stress damage to the diamond wire will greatly increase the risk of diamond wire breakage. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, the present invention provides an automatic control method and system for diamond wire guide rollers for correction, which solves the technical problem that the guide rollers are prone to wear in existing diamond wire winding and unwinding methods. This achieves the purpose of reducing the breakage rate of diamond wire and extending the service life of the guide rollers by eliminating or reducing the probability of wear on the guide rollers during their service life.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0007] An automatic control method for wire guide rollers used for diamond wire alignment includes the following steps:

[0008] Obtain the number of winding layers m on the pay-off reel, and based on the number of winding layers m, obtain the deflection P1 of the diamond wire in the pay-off reel chamber relative to the pay-off guide wheel;

[0009] The angle θm of the rotation of the wire feeding guide wheel is obtained according to the deflection P1, and the wire feeding guide wheel is controlled by the servo motor in the wire feeding wheel chamber based on the deflection period.

[0010] Obtain the number of winding layers n on the take-up reel, and based on the number of winding layers n, obtain the deflection P2 of the diamond wire in the take-up reel compartment relative to the take-up guide wheel;

[0011] The angle θn of the rotation of the take-up and guide wheel is obtained based on the deflection P2, and the take-up and guide wheel is controlled by the servo motor in the take-up wheel chamber based on the deflection period.

[0012] If a diamond wire breaks during the take-up and undo process and the take-up and undo process is resumed, the automatic wire breakage control procedure will be executed.

[0013] The automatic disconnection control steps include:

[0014] The angle θm of rotation of the wire feeding guide wheel is obtained. p The wire feeding guide wheel is controlled by a servo motor in the wire feeding wheel chamber based on the deflection period.

[0015] The angle θn of the rotation of the take-up and guide wheel is obtained. p The take-up guide wheel is controlled by a servo motor in the take-up wheel chamber based on the deflection period.

[0016] In a preferred embodiment of the present invention, when obtaining the deflection P1 of the diamond wire in the wire feeding chamber relative to the wire feeding guide wheel, the following steps are included:

[0017] Obtain the parameters required to obtain the deflection amount P1;

[0018] The parameters include: the diameter of the wire feeding guide wheel, the diameter of the empty wire feeding wheel, the distance from the bottom of the wire groove of the wire feeding guide wheel to the empty wire feeding wheel, and the diameter of the diamond wire.

[0019] The deflection amount P1 is obtained based on the parameters mentioned above, as shown in Formula 1:

[0020]

[0021] In the formula, D is the diameter of the wire feeding and guiding wheel. The diameter of the empty pay-off reel is given by , h is the distance from the bottom of the groove of the pay-off guide wheel to the empty pay-off reel by , and d is the diameter of the diamond wire.

[0022] In a preferred embodiment of the present invention, obtaining the rotation angle θm of the wire feeding guide wheel includes:

[0023] The angle θm of rotation of the wire feeding guide wheel is obtained based on the deflection P1 and the diameter of the diamond wire, as shown in Formula 2:

[0024] θm=1 / 2*P1 / (D / 2) (2).

[0025] In a preferred embodiment of the present invention, when obtaining the deflection P2 of the diamond wire in the take-up reel compartment relative to the take-up guide reel, the following steps are included:

[0026] Obtain the parameters required to obtain the deflection P2;

[0027] The parameters include: the diameter of the take-up guide wheel, the diameter of the empty pay-off wheel, the diameter of the empty take-up wheel, the distance from the bottom of the groove of the take-up guide wheel to the empty take-up wheel, and the diameter of the diamond wire.

[0028] The deflection amount P2 is obtained based on the aforementioned parameters, as shown in Formula 3:

[0029]

[0030] In the formula, D is the diameter of the wire feeding and guiding wheel. The diameter of the empty feed reel. The diameter of the empty take-up reel is given by denoted by h, the distance from the bottom of the groove of the take-up guide wheel to the empty take-up reel is given by denoted by d, and the diameter of the diamond wire is given by d.

[0031] In a preferred embodiment of the present invention, obtaining the rotation angle θn of the take-up and cable-laying guide wheel includes:

[0032] The angle θn of rotation of the take-up and guide wheel is obtained based on the deflection P2 and the diameter of the diamond wire, as shown in Formula 4:

[0033] θn=P2 / (D / 2) (4).

[0034] In a preferred embodiment of the present invention, the angle θm of the rotation of the wire feeding guide wheel is obtained. p At that time, including:

[0035] The deflection P1 of the diamond wire in the wire feeding chamber relative to the wire feeding guide wheel is obtained. p And according to the deflection amount P1 p The angle θm of rotation of the wire feeding guide wheel is obtained. p ;

[0036] The angle θn of the rotation of the take-up and guide wheel is obtained. p At that time, including:

[0037] The deflection P2 of the diamond wire in the take-up reel compartment relative to the take-up guide wheel is obtained. p And according to the deflection amount P2 p The angle θn of the rotation of the take-up and guide wheel is obtained. p .

[0038] In a preferred embodiment of the present invention, the deflection P1 of the diamond wire in the wire feeding chamber relative to the wire feeding guide wheel is obtained. p At that time, including:

[0039] The deflection amount P1 is obtained. p The required parameters;

[0040] The parameters include: the waiting angle deflection period Np, the diameter of the wire feeding guide wheel, the diameter of the empty wire feeding wheel, the distance from the bottom of the wire groove of the wire feeding guide wheel to the empty wire feeding wheel, and the diameter of the diamond wire.

[0041] The process of obtaining the period Np of the waiting angle deflection includes:

[0042] To obtain the actual amount of thread used in the process after a breakage occurs on the take-up and pay-off reels, see Formula 5:

[0043] L3 p =1 / 2*a*(t1*t1-t4*t4+t3*t3-t6*t6+2t3*t1-2t6*t4)-[(Q1*W1.1+Tz*S1+R1*W2.

[0044] 1+Tz*S1R1)+(Q2*W1.2+Tz*S2+R2*W2.2+Tz*S2)....(+Q p *W1.p+Tz*S p +R p *W2. p +Tz*S p )](5);

[0045] In the formula, p is the number of times the diamond wire breaks within the processing cycle of the pay-off wheel; W1.1, W1.2…W1. p The outer diameter variation of the take-up / untake-off amount on the take-up reel; W2.1, W2.2…W2. p The amount of wire taken in and out varies with the outer diameter of the wire feeding reel; Q1, Q2...Q p R1, R2...R p Tz is the number of rotations of the take-up reel after the wire breakage; t1 is the acceleration time during the wire feeding process; t3 is the deceleration time during the wire feeding process; t4 is the acceleration time during the take-up process; and t6 is the deceleration time during the take-up process.

[0046] Based on the actual amount of line used in the process, the period Np for the waiting angle deflection is obtained, as shown in Formula 6:

[0047]

[0048] In the formula, W3 is the diameter of the empty feed reel, d is the diameter of the diamond wire, W3 is the effective winding width of the feed reel, and W4 is the winding spacing of the diamond wire.

[0049] The deflection P1 is obtained based on the aforementioned parameters. p As shown in Formula 7:

[0050]

[0051] In the formula, D is the diameter of the wire feeding guide wheel, and h is the distance from the bottom of the wire groove of the wire feeding guide wheel to the empty wire feeding wheel. d is the diameter of the empty feed reel, and d is the diameter of the diamond wire.

[0052] The angle θm of the rotation of the wire feeding guide wheel is obtained. p At that time, as shown in Formula 8:

[0053] θm p =arctanP1 p / (D / 2) (8).

[0054] In a preferred embodiment of the present invention, the deflection P2 of the diamond wire in the take-up reel compartment relative to the take-up guide wheel is obtained. p At that time, including:

[0055] The deflection amount P2 is obtained. p The required parameters;

[0056] The parameters include: the waiting angle deflection period Np, the diameter of the empty pay-off spool, the diameter of the take-up guide spool, the diameter of the empty take-up spool, the distance from the bottom of the groove of the take-up guide spool to the empty pay-off spool, and the diameter of the diamond wire.

[0057] The process of obtaining the period of the waiting angle deflection includes:

[0058] To obtain the actual amount of thread used in the process after a breakage occurs on the take-up and pay-off reels, see Formula 9:

[0059] L3 p =1 / 2*a*(t1*t1-t4*t4+t3*t3-t6*t6+2t3*t1-2t6*t4)-[(Q1*W1.1+Tz*S1+R1*W2.

[0060] 1+Tz*S1R1)+(Q2*W1.2+Tz*S2+R2*W2.2+Tz*S2)....(+Q p *W1.p+Tz*S p +R p *W2. p +Tz*S p )](9);

[0061] In the formula, p is the number of times the diamond wire breaks within the processing cycle of the pay-off wheel; W1.1, W1.2…W1. p The outer diameter variation of the take-up / untake-off amount on the take-up reel; W2.1, W2.2…W2. p The amount of wire taken in and out varies with the outer diameter of the wire feeding reel; Q1, Q2...Q p R1, R2...R p Tz is the number of rotations of the take-up reel after the wire breakage; Tz is the diameter of the main roller; t1 is the acceleration time of the wire feeding process; t3 is the deceleration time of the wire feeding process; t4 is the acceleration time of the wire take-up process; t6 is the deceleration time of the wire take-up process.

[0062] Based on the actual amount of line used in the process, the period Np of the waiting angle deflection is obtained, as shown in Formula 10:

[0063]

[0064] In the formula, W3 is the diameter of the empty feed reel, d is the diameter of the diamond wire, W3 is the effective winding width of the feed reel, and W4 is the winding spacing of the diamond wire.

[0065] The deflection P2 is obtained based on the aforementioned parameters. p As shown in Formula 11:

[0066]

[0067] In the formula, D is the diameter of the take-up guide wheel, and h is the distance from the bottom of the groove of the take-up guide wheel to the empty take-up wheel. The diameter of the empty feed reel. d is the diameter of the empty take-up reel, and d is the diameter of the diamond wire.

[0068] In a preferred embodiment of the present invention, the angle θn of the rotation of the take-up and guide wheel is obtained. p At that time, as shown in Formula 12:

[0069] θnp=arctan P2 p / (D / 2) (12).

[0070] An automatic control system for wire guide rollers used for diamond wire alignment includes:

[0071] The wire deflection acquisition unit is used to acquire the number of winding layers m on the wire feeding wheel, and to obtain the deflection P1 of the diamond wire in the wire feeding wheel chamber relative to the wire feeding guide wheel based on the number of winding layers m.

[0072] The wire feeding control unit is used to obtain the rotation angle θm of the wire feeding guide wheel according to the deflection amount P1, and control the wire feeding guide wheel through the servo motor in the wire feeding wheel chamber based on the deflection period.

[0073] Take-up deflection acquisition unit: used to acquire the number of winding layers n on the take-up reel, and to obtain the deflection P2 of the diamond wire in the take-up reel compartment relative to the take-up guide wheel based on the number of winding layers n;

[0074] Take-up control unit: used to obtain the rotation angle θn of the take-up guide wheel according to the deflection amount P2, and control the take-up guide wheel through the servo motor in the take-up wheel chamber based on the deflection period;

[0075] If a diamond wire breaks during the take-up and release process and the take-up and release are resumed, the release control unit is further configured to obtain the rotation angle θm of the release guide wheel. p The wire feeding guide wheel is controlled by a servo motor in the wire feeding wheel chamber based on the deflection period.

[0076] The take-up control unit is also used to obtain the rotation angle θn of the take-up guide wheel. p The take-up guide wheel is controlled by a servo motor in the take-up wheel chamber based on the deflection period.

[0077] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0078] (1) To eliminate the friction between the diamond wire guide wheel and the slicing machine guide wheel caused by the increase or decrease of diamond wire on the take-up and untake-down reels during operation, this invention designs a precision rotation system controlled by a servo motor to control the rotation angle of the slicing guide wheel. The amount of diamond wire used is calculated by combining the number of rotations of the take-up and untake-down reels with the amount of diamond wire used monitored by the PLC program, and relevant control parameters are output. This ensures that the wire groove of the slicing guide wheel always coincides with the diamond wire throughout the entire working cycle, and the extension wire of the wire groove and the diamond wire are tangent to the reel. The above control process effectively eliminates or reduces the uneven wear of the diamond wire on the slicing guide wheel during its service life, thereby reducing the diamond wire breakage rate, reducing the wear of the slicing guide wheel, and extending its service life.

[0079] (2) This invention improves the production efficiency of the slicing machine and the yield of silicon wafers by reducing the breakage rate of diamond wire.

[0080] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0081] Figure 1 This is a schematic diagram of the diamond wire offset process described in the background art of this invention;

[0082] Figure 2 This is a flowchart illustrating the automatic control method for the wire guide wheel used for diamond wire alignment provided by the present invention. Detailed Implementation

[0083] The automatic control method for wire guide rollers for diamond wire alignment provided by this invention, such as... Figure 2 As shown, it includes the following steps:

[0084] Step S1: Obtain the number of winding layers m on the pay-off reel, and obtain the deflection P1 of the diamond wire in the pay-off reel chamber relative to the pay-off guide wheel based on the number of winding layers m;

[0085] Step S2: Obtain the rotation angle θm of the wire feeding guide wheel based on the deflection P1, and control the wire feeding guide wheel through the servo motor in the wire feeding wheel chamber based on the deflection period;

[0086] Step S3: Obtain the number of winding layers n on the take-up reel, and obtain the deflection P2 of the diamond wire in the take-up reel compartment relative to the take-up guide wheel based on the number of winding layers n;

[0087] Step S4: Obtain the rotation angle θn of the take-up guide wheel based on the deflection P2, and control the take-up guide wheel through the servo motor in the take-up wheel chamber based on the deflection period;

[0088] Step S5: If a diamond wire breaks during the winding and unwinding process and the winding and unwinding process is resumed, then the automatic wire breakage control step is executed.

[0089] The automatic disconnection control steps include:

[0090] Obtain the angle θm of the rotation of the wire feeding guide wheel. p The wire feeding guide wheel is controlled by a servo motor in the wire feeding wheel chamber based on the deflection period.

[0091] Obtain the angle θn of the rotation of the take-up and guide wheel. p The take-up and guide wheels are controlled by a servo motor in the take-up reel compartment based on the deflection period.

[0092] In step S1 above, when obtaining the deflection P1 of the diamond wire in the wire feeding chamber relative to the wire feeding guide wheel, the following steps are included:

[0093] Obtain the parameters required to obtain the deflection P1;

[0094] The parameters include: the diameter of the wire feeding guide wheel, the diameter of the empty wire feeding wheel, the distance from the bottom of the wire groove of the wire feeding guide wheel to the empty wire feeding wheel, and the diameter of the diamond wire.

[0095] The deflection P1 is obtained based on the parameters, as shown in Formula 1:

[0096]

[0097] In the formula, D is the diameter of the wire feeding guide wheel. denoted as the diameter of the empty feed reel, h as the distance from the bottom of the groove of the feed guide wheel to the empty feed reel, and d as the diameter of the diamond wire.

[0098] In step S2 above, when obtaining the rotation angle θm of the wire feeding guide wheel, the following steps are included:

[0099] The angle θm of the wire feeding guide wheel rotation is obtained based on the deflection P1 and the diameter of the diamond wire, as shown in Formula 2:

[0100] θm=1 / 2*P1 / (D / 2) (2).

[0101] In step S3 above, when obtaining the deflection P2 of the diamond wire in the take-up reel compartment relative to the take-up guide wheel, the following steps are included:

[0102] Obtain the parameters required to obtain the deflection P2;

[0103] The parameters include: the diameter of the take-up guide wheel, the diameter of the empty feed wheel, the diameter of the empty take-up wheel, the distance from the bottom of the take-up guide wheel groove to the empty take-up wheel, and the diameter of the diamond wire.

[0104] The deflection amount P2 is obtained based on the parameters, as shown in Formula 3:

[0105]

[0106] In the formula, D is the diameter of the wire feeding guide wheel. The diameter of the empty feed reel. denoted as the diameter of the empty take-up reel, h as the distance from the bottom of the groove of the take-up guide wheel to the empty take-up reel, and d as the diameter of the diamond wire.

[0107] In step S4 above, when obtaining the rotation angle θn of the take-up and cable guide wheel, the following steps are included:

[0108] The angle θn of the take-up and guide wheel rotation is obtained based on the deflection P2 and the diameter of the diamond wire, as shown in Formula 4:

[0109] θn=P2 / (D / 2) (4).

[0110] In step S5 above, after obtaining the rotation angle θm of the wire feeding guide wheel... p At that time, including:

[0111] The deflection P1 of the diamond wire in the wire feeding chamber relative to the wire feeding guide wheel is obtained. p And based on the deflection amount P1 p Obtain the angle θm of the rotation of the wire feeding guide wheel. p ;

[0112] The angle θn of the rotation of the take-up and cable-laying guide wheel is obtained. p At that time, including:

[0113] The deflection P2 of the diamond wire in the take-up reel compartment relative to the take-up guide wheel is obtained. p And based on the deflection amount P2 p Obtain the angle θn of the rotation of the take-up and guide wheel. p .

[0114] Furthermore, after obtaining the deflection P1 of the diamond wire in the wire feeding chamber relative to the wire feeding guide wheel... p At that time, including:

[0115] Obtain the deflection amount P1 p The required parameters;

[0116] The parameters include: the waiting angle deflection period Np, the diameter of the wire feeding guide wheel, the diameter of the empty wire feeding wheel, the distance from the bottom of the wire groove of the wire feeding guide wheel to the empty wire feeding wheel, and the diameter of the diamond wire.

[0117] Among them, when obtaining the period Np of the waiting angle deflection, it includes:

[0118] To obtain the actual amount of thread used in the process after a breakage occurs on the take-up and pay-off reels, see Formula 5:

[0119] L3 p =1 / 2*a*(t1*t1-t4*t4+t3*t3-t6*t6+2t3*t1-2t6*t4)-[(Q1*W1.1+Tz*S1+R1*W2.

[0120] 1+Tz*S1R1)+(Q2*W1.2+Tz*S2+R2*W2.2+Tz*S2)....(+Q p *W1.p+Tz*S p +R p *W2. p +Tz*S p )](5);

[0121] In the formula, p is the number of times the diamond wire breaks within the processing cycle of the pay-off wheel; W1.1, W1.2…W1. p The outer diameter variation of the take-up / untake-off amount on the take-up reel; W2.1, W2.2…W2. p The amount of wire taken in and out varies with the outer diameter of the wire feeding reel; Q1, Q2...Q p R1, R2...R p Tz is the number of rotations of the take-up reel after the wire breakage; t1 is the acceleration time during the wire feeding process; t3 is the deceleration time during the wire feeding process; t4 is the acceleration time during the take-up process; and t6 is the deceleration time during the take-up process.

[0122] Based on the actual amount of wire used in the process, the waiting angle deflection period Np is obtained, as shown in Formula 6:

[0123]

[0124] In the formula, W3 is the diameter of the empty feed reel, d is the diameter of the diamond wire, W3 is the effective winding width of the feed reel, and W4 is the winding spacing of the diamond wire.

[0125] The deflection P1 is obtained based on each parameter. p As shown in Formula 7:

[0126]

[0127] In the formula, D is the diameter of the wire feeding guide wheel, and h is the distance from the bottom of the wire groove of the wire feeding guide wheel to the empty wire feeding wheel. d is the diameter of the empty feed reel, and d is the diameter of the diamond wire.

[0128] The angle θm of the rotation of the wire feeding guide wheel is obtained. p At that time, as shown in Formula 8:

[0129] θm p =arctanP1 p / (D / 2) (8).

[0130] Furthermore, after obtaining the deflection P2 of the diamond wire in the take-up reel compartment relative to the take-up guide wheel... p At that time, including:

[0131] Obtain the deflection amount P2 p The required parameters;

[0132] The parameters include: the waiting angle deflection period Np, the diameter of the empty pay-off spool, the diameter of the take-up guide spool, the diameter of the empty take-up spool, the distance from the bottom of the take-up guide spool to the empty pay-off spool, and the diamond wire diameter.

[0133] Among them, the period for obtaining the waiting angle deflection includes:

[0134] To obtain the actual amount of thread used in the process after a breakage occurs on the take-up and pay-off reels, see Formula 9:

[0135] L3 p =1 / 2*a*(t1*t1-t4*t4+t3*t3-t6*t6+2t3*t1-2t6*t4)-[(Q1*W1.1+Tz*S1+R1*W2.

[0136] 1+Tz*S1R1)+(Q2*W1.2+Tz*S2+R2*W2.2+Tz*S2)....(+Q p *W1.p+Tz*S p +R p *W2. p +Tz*S p )](9);

[0137] In the formula, p is the number of times the diamond wire breaks within the processing cycle of the pay-off wheel; W1.1, W1.2…W1. p The outer diameter variation of the take-up / untake-off amount on the take-up reel; W2.1, W2.2…W2. p The amount of wire taken in and out varies with the outer diameter of the wire feeding reel; Q1, Q2...Q p R1, R2...R p Tz is the number of rotations of the take-up reel after the wire breakage; Tz is the diameter of the main roller; t1 is the acceleration time of the wire feeding process; t3 is the deceleration time of the wire feeding process; t4 is the acceleration time of the wire take-up process; t6 is the deceleration time of the wire take-up process.

[0138] Based on the actual amount of wire used in the process, the waiting angle deflection period Np is obtained, as shown in Formula 10:

[0139]

[0140] In the formula, W3 is the diameter of the empty feed reel, d is the diameter of the diamond wire, W3 is the effective winding width of the feed reel, and W4 is the winding spacing of the diamond wire.

[0141] The deflection P2 is obtained based on each parameter. p As shown in Formula 11:

[0142]

[0143] In the formula, D is the diameter of the take-up guide wheel, and h is the distance from the bottom of the groove of the take-up guide wheel to the empty take-up wheel. The diameter of the empty feed reel. d is the diameter of the empty take-up reel, and d is the diameter of the diamond wire.

[0144] Furthermore, after obtaining the rotation angle θn of the take-up and cable guide wheel... p At that time, as shown in Formula 12:

[0145] θnp=arctan P2 p / (D / 2) (12).

[0146] The automatic control system for diamond wire guide rollers for wire correction provided by the present invention includes: a wire feeding deflection acquisition unit, a wire feeding control unit, a wire take-up deflection acquisition unit, and a wire take-up control unit.

[0147] The wire deflection acquisition unit is used to obtain the number of winding layers m on the wire feeding wheel, and to obtain the deflection P1 of the diamond wire in the wire feeding wheel chamber relative to the wire feeding guide wheel based on the number of winding layers m.

[0148] The wire feeding control unit is used to obtain the rotation angle θm of the wire feeding guide wheel according to the deflection amount P1, and to control the wire feeding guide wheel through the servo motor in the wire feeding wheel chamber based on the deflection period.

[0149] The take-up deflection acquisition unit is used to obtain the number of winding layers n on the take-up reel, and to obtain the deflection P2 of the diamond wire in the take-up reel compartment relative to the take-up guide wheel based on the number of winding layers n.

[0150] The take-up control unit is used to obtain the rotation angle θn of the take-up guide wheel based on the deflection amount P2, and to control the take-up guide wheel through the servo motor in the take-up wheel chamber based on the deflection period.

[0151] If a diamond wire breaks during the take-up and release process and the take-up and release are resumed, the release control unit is also used to obtain the rotation angle θm of the release guide wheel. p The wire feeding guide wheel is controlled by a servo motor in the wire feeding wheel chamber based on the deflection period.

[0152] The take-up control unit is also used to obtain the rotation angle θn of the take-up guide wheel. p The take-up and guide wheels are controlled by a servo motor in the take-up reel compartment based on the deflection period.

[0153] The following embodiments are further illustrations of the present invention, but the scope of the present invention is not limited thereto.

[0154] In the initial state before starting the slicing machine, the bottom of the V-shaped groove of the wire guide wheel is perpendicular to the horizontal plane and tangent to the take-up and pay-off wheels. During the wire feeding process, the outer diameter of the pay-off wheel gradually decreases, and the wheel, driven by the diamond wire, gradually begins to rotate around the shaft. During this process, due to the high-frequency alternating speed rotation of the pay-off wheel in the process design; taking each cycle as an example, the amount of wire fed out is greater than the amount of wire taken in, the wheel gradually increases its rotation angle positively through alternating oscillation, and the diamond wire does work against the gravity exerted on it by the wire guide wheel. During this process, the diamond wire is subjected to radial shear stress, and the tension it can withstand gradually decreases.

[0155] During the take-up process, the outer diameter of the take-up reel gradually increases, and the reel, driven by the diamond wire, gradually begins to rotate around the shaft. During this process, due to the design of the process, the take-up reel rotates at a high frequency with alternating speeds; taking each cycle as an example, the amount of wire let out is greater than the amount taken in. In this process, the reel gradually increases its rotation angle in a reverse oscillating manner, and the diamond wire does work against the gravity exerted on it by the guide wheel. During this process, the diamond wire is subjected to radial shear stress, and the tension it can withstand gradually decreases.

[0156] To eliminate the friction between the take-up and untake-up reels and the guide rollers caused by the increase or decrease of diamond wire on the take-up and untake-up reels during the slicing machine's operation, a precision rotation system controlled by a servo motor was designed to control the rotation angle of the guide rollers. The amount of diamond wire used is calculated by combining the number of rotations of the take-up and untake-up reels with the amount of diamond wire used monitored by the PLC program, and relevant control parameters are output. This ensures that the wire groove of the guide roller always coincides with the diamond wire throughout the entire working cycle, and that the extension of the wire groove and the diamond wire are tangent to the reel. The control logic is as follows:

[0157] Let the diameter of the cable guide wheel be D;

[0158] The diameter of the empty feed reel is

[0159] The diameter of the empty take-up reel is

[0160] The distance from the bottom of the cable guide wheel groove to the empty take-up and release wheel is h;

[0161] The change in the outer diameter of the take-up / delivery amount on the take-up reel is W1;

[0162] The change in the outer diameter of the pay-off reel is W2;

[0163] The process feed rate is L1;

[0164] The process take-up amount is L2;

[0165] In a periodic process, the linear velocity during the wire feeding acceleration process is S1;

[0166] Linear quantity S2 during the uniform speed of wire laying;

[0167] Line quantity S3 during the deceleration process of wire laying;

[0168] The acceleration or deceleration is a constant value a;

[0169] The acceleration time is t1;

[0170] The uniform motion time is t2;

[0171] The deceleration time is t3;

[0172] In a cycle process, the amount of wire taken up during the acceleration process is S4;

[0173] Line quantity S5 during the uniform speed of wire laying;

[0174] Line quantity S6 during the deceleration process of wire laying;

[0175] The acceleration or deceleration is a constant value a;

[0176] The acceleration time is t4;

[0177] The uniform motion time is t5;

[0178] The deceleration time is t6;

[0179] The maximum speed is V1;

[0180] The diameter of the diamond wire is d;

[0181] The spacing between the diamond wire windings is W4;

[0182] The effective winding width of the take-up and pay-off reels is W3;

[0183] The detection and adjustment cycle is T;

[0184] The detection adjustment frequency is f = 1 / T;

[0185] The deflection adjustment angle of the servo motor for the reel is θ;

[0186] Then we have:

[0187] S1 = 1 / 2 * a * t1 * t1;

[0188] S2 = a * t1 * t2;

[0189] S3 = t3*a*t1 - 1 / 2*a*t3*t3;

[0190] S4 = 1 / 2 * a * t4 * t4;

[0191] S5 = a * t4 * t5;

[0192] S6 = t6 * a * t4 - 1 / 2 * a * t6 * t6;

[0193] During the take-up and undoing of the wire on the take-up and undo reel, the diameter does not change constantly. Only after one winding cycle, when the diamond wire overlaps for the first time, will the winding diameter increase or decrease. At this time, the offset angle θ of the right triangle formed by the diamond wire and the perpendicular normal will change. This angle is calculated as follows:

[0194] Taking the installation of a new pay-off reel as an example:

[0195] The amount of wire fed in the first winding cycle of the feed reel is S7;

[0196] The number of wire loops undulated by the wire reel in the first wire-feeding cycle is n;

[0197] n = W3 / (d+W4);

[0198]

[0199] After one take-up and release cycle, the actual amount of wire used is L3.

[0200] L3 = L1 - L2

[0201] = (S1+S2+S3)-(S4+S5+S6)

[0202] =(1 / 2*a*t1*t1+a*t1*t2+t3*a*t1-1 / 2*a*t3*t3)-(1 / 2*a*t4*t4+a*t4*t5+t6*a*t4-1 / 2*a*t6*t6)

[0203] =1 / 2*a*(t1*t1-t4*t4)+a*(t3*t1-t6*t4)+1 / 2*a*(t3*t3-t6*t6)

[0204] =1 / 2*a*(t1*t1-t4*t4+t3*t3-t6*t6+2t3*t1-2t6*t4)

[0205] The first offset angle is θ1, and the number of waiting cycles is N;

[0206]

[0207] During the take-up and unwinding phases of the N*m-th cycle, the servo motor will exhibit oscillating rotation in both directions. The number of winding layers on the spool is m.

[0208] When deflection occurs during both the release and retraction phases, the deflection period is T1m.

[0209]

[0210] When no deflection occurs during the release and take-up phases, the deflection period is T2m;

[0211]

[0212] The number of winding layers on the reel is the number of adjustments made by the reel servo motor. Therefore, the sine value of the angle θm adjusted by the reel for the mth time is Wm = m * d.

[0213]

[0214] The deflection of the diamond wire in the wire feeding compartment relative to the wire guide wheel is P1;

[0215]

[0216] The angle at which the servo motor controls the rotation of the cable guide wheel is θm;

[0217]

[0218] The number of winding layers on the spool is the number of adjustments made by the spool servo motor. Therefore, the sine value of the angle θn adjusted by the nth spool is...

[0219] The deflection of the diamond wire in the take-up compartment relative to the wire guide wheel is P2;

[0220]

[0221]

[0222] The angle at which the servo motor controls the cable guide wheel to rotate is θn;

[0223]

[0224] In actual use, the abnormal phenomenon of diamond wire breakage may occur. At this time, part of the diamond wire is lost. This part of the diamond wire is not wound on the pay-off wheel or take-up wheel. Therefore, when the abnormality of wire breakage occurs, the actual offset of the wire guide wheel will be less than the theoretical offset.

[0225] Let P be the number of times the diamond wire breaks during the processing cycle of the pay-off wheel;

[0226] When a wire breaks, the amount of wire used is displayed as Y1, Y2...Y p ;

[0227] The amount of take-up and take-out varies with the outer diameter of the take-up reel as W1.1, W1.2...W1. p ;

[0228] The amount of wire taken in and out varies with the outer diameter of the wire feeding reel as W2.1, W2.2...W2.p ;

[0229] After the wire breakage, the number of rotations of the feed wheel is Q1, Q2...Q p ;

[0230] After the wire breaks, the take-up reel rotates R1, R2...R p ;

[0231] The number of rotations of the main roller after the thread breaks is S1, S2…S p ;

[0232] The diameter of the main roller is Tz;

[0233] The number of rotations of the main roller during each breakage process is K;

[0234] During this period, the line loss caused by the disconnection is U;

[0235] Up=Q1*W1.1+Tz*S1+R1*W2.1+Tz*S1R1+Q2*W1.2+Tz*S2+R2*W2.2+Tz*S2....+

[0236] Q p *W1. p +Tz*S p +Rp*W2. p +Tz*S p

[0237] In summary,

[0238]

[0239]

[0240] The amount of process line L3 = 1 / 2 * a * (t1 * t1 - t4 * t4 + t3 * t3 - t6 * t6 + 2t3 * t1 - 2t6 * t4)

[0241] Actual amount of thread used in the process after a breakage occurs on the take-up / feed-out reel:

[0242] L3 p =1 / 2*a*(t1*t1-t4*t4+t3*t3-t6*t6+2t3*t1-2t6*t4)-[(Q1*W1.1+Tz*S1+R1*W2.

[0243] 1+Tz*S1R1)+(Q2*W1.2+Tz*S2+R2*W2.2+Tz*S2)....(+Q p *W1. p +Tz*S p +R p *W2.p +Tz*S p )]

[0244] The offset angle of the pay-off reel is θ1p, and its waiting period for the angle deflection is Np;

[0245]

[0246] When deflection occurs during both the release and take-back phases, the deflection period is T1mp.

[0247]

[0248] When no deflection occurs during the release and take-back phases, the deflection period is T2mp;

[0249]

[0250] The deflection of the diamond wire in the wire feeding compartment relative to the wire guide wheel is P1. p ;

[0251]

[0252] The angle by which the wire guide wheel is rotated by the servo motor of the wire feeding compartment is θmp;

[0253]

[0254] The number of winding layers on the spool is the number of adjustments made by the spool servo motor. Therefore, the sine value of the angle θn adjusted by the nth spool is...

[0255] The deflection of the diamond wire in the take-up compartment relative to the wire guide wheel is P2p;

[0256]

[0257]

[0258] The angle at which the servo motor in the take-up compartment controls the rotation of the cable guide wheel is θn;

[0259]

[0260] During the operation of the slicing machine, as the take-up and pay-off reels rotate periodically, the servo motors controlling the rotation of the wire guide rollers in the take-up and pay-off reel chambers rotate according to the aforementioned design values ​​and deflection cycles. This ensures that the wire groove of the wire guide roller always coincides with the diamond wire throughout the entire working cycle of the wire guide roller, and the extension line of the wire groove and the diamond wire are tangent to the wire reel. As a result, the diamond wire will not rub against the V-shaped wire groove cone surface, reducing stress damage to the diamond wire and lowering the breakage rate of the diamond wire.

[0261] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. An automatic control method for a wire guide wheel used for diamond wire alignment, characterized in that, Includes the following steps: Obtain the number of winding layers m on the pay-off reel, and based on the number of winding layers m, obtain the deflection P1 of the diamond wire in the pay-off reel chamber relative to the pay-off guide wheel; The angle θm of the rotation of the wire feeding guide wheel is obtained according to the deflection P1, and the wire feeding guide wheel is controlled by the servo motor in the wire feeding wheel chamber based on the deflection period. Obtain the number of winding layers n on the take-up reel, and based on the number of winding layers n, obtain the deflection P2 of the diamond wire in the take-up reel compartment relative to the take-up guide wheel; The angle θn of the rotation of the take-up and guide wheel is obtained based on the deflection P2, and the take-up and guide wheel is controlled by the servo motor in the take-up wheel chamber based on the deflection period. If a diamond wire breaks during the take-up and undo process and the take-up and undo process is resumed, the automatic wire breakage control procedure will be executed. The automatic disconnection control steps include: The angle θm of rotation of the wire feeding guide wheel is obtained. p The wire feeding guide wheel is controlled by a servo motor in the wire feeding wheel chamber based on the deflection period. The angle θn of the rotation of the take-up and guide wheel is obtained. p The take-up guide wheel is controlled by a servo motor in the take-up wheel chamber based on the deflection period.

2. The automatic control method for the wire guide wheel for diamond wire alignment according to claim 1, characterized in that, When obtaining the deflection P1 of the diamond wire in the wire feeding chamber relative to the wire feeding guide wheel, it includes: Obtain the parameters required to obtain the deflection amount P1; The parameters include: the diameter of the wire feeding guide wheel, the diameter of the empty wire feeding wheel, the distance from the bottom of the wire groove of the wire feeding guide wheel to the empty wire feeding wheel, and the diameter of the diamond wire. The deflection amount P1 is obtained based on the parameters mentioned above, as shown in Formula 1: P1={(D / 2) / [(Ø1+D) / 2+h]} m d(1); In the formula, D is the diameter of the wire feeding guide wheel, Ø1 is the diameter of the empty wire feeding wheel, h is the distance from the bottom of the wire groove of the wire feeding guide wheel to the empty wire feeding wheel, and d is the diameter of the diamond wire.

3. The automatic control method for the wire guide wheel for diamond wire alignment according to claim 2, characterized in that, When obtaining the rotation angle θm of the wire feeding guide wheel, the following is included: The angle θm of rotation of the wire feeding guide wheel is obtained based on the deflection P1 and the diameter of the diamond wire, as shown in Formula 2: θm=1 / 2 P1 / (D / 2)(2)。 4. The automatic control method for the wire guide wheel for diamond wire alignment according to claim 1, characterized in that, When obtaining the deflection P2 of the diamond wire in the take-up reel compartment relative to the take-up guide wheel, it includes: Obtain the parameters required to obtain the deflection P2; The parameters include: the diameter of the take-up guide wheel, the diameter of the empty pay-off wheel, the diameter of the empty take-up wheel, the distance from the bottom of the groove of the take-up guide wheel to the empty take-up wheel, and the diameter of the diamond wire. The deflection amount P2 is obtained based on the aforementioned parameters, as shown in Formula 3: P2={(D / 2) / [(Ø1+D) / 2+h]} m d Ø1 / Ø2(3); =1 / 2 {D / [(Ø1+D) / 2+h]} m d Ø1 / Ø2 In the formula, D is the diameter of the wire feeding guide wheel, Ø1 is the diameter of the empty wire feeding wheel, Ø2 is the diameter of the empty wire taking wheel, h is the distance from the bottom of the wire groove of the wire taking guide wheel to the empty wire taking wheel, and d is the diameter of the diamond wire.

5. The automatic control method for the wire guide wheel for diamond wire alignment according to claim 4, characterized in that, When obtaining the rotation angle θn of the take-up and cable guide wheel, the following is included: The angle θn of rotation of the take-up and guide wheel is obtained based on the deflection P2 and the diameter of the diamond wire, as shown in Formula 4: θn=P2 / (D / 2)(4) 6. The automatic control method for the wire guide wheel for diamond wire alignment according to claim 1, characterized in that, The angle θm of the rotation of the wire feeding guide wheel is obtained. p At that time, including: The deflection P1 of the diamond wire in the wire feeding chamber relative to the wire feeding guide wheel is obtained. p And according to the deflection amount P1 p The angle θm of rotation of the wire feeding guide wheel is obtained. p ; The angle θn of the rotation of the take-up and guide wheel is obtained. p At that time, including: The deflection P2 of the diamond wire in the take-up reel compartment relative to the take-up guide wheel is obtained. p And according to the deflection amount P2 p The angle θn of the rotation of the take-up and guide wheel is obtained. p .

7. The automatic control method for the wire guide wheel for diamond wire alignment according to claim 6, characterized in that, The deflection P1 of the diamond wire in the wire feeding chamber relative to the wire feeding guide wheel is obtained. p At that time, including: The deflection amount P1 is obtained. p The required parameters; The parameters include: the waiting angle deflection period Np, the diameter of the wire feeding guide wheel, the diameter of the empty wire feeding wheel, the distance from the bottom of the wire groove of the wire feeding guide wheel to the empty wire feeding wheel, and the diameter of the diamond wire. The process of obtaining the period Np of the waiting angle deflection includes: To obtain the actual amount of thread used in the process after a breakage occurs on the take-up and pay-off reels, see Formula 5: L3 p =1 / 2 a (t1 t1-t4 t4+t3 t3-t6 t6+2t3 t1-2t6 t4)-[(Q1 W1.1+Tz S1+R1 W2.1+Tz S1R1)+(Q2 W1.2+Tz S2+R2 W2.2+Tz S2)...(+Q p W1.p+Tz S p +R p W2. p +Tz S p (5) In the formula, a is the constant value of acceleration / deceleration, p is the number of times the diamond wire breaks within the processing cycle of the pay-off wheel; W1.1, W1.2…W1. p The outer diameter variation of the take-up / untake-off amount on the take-up reel; W2.1, W2.2…W2. p The amount of wire taken in and out varies with the outer diameter of the wire feeding reel; Q1, Q2...Q p R1, R2...R p Tz is the number of rotations of the take-up reel after the wire breakage; t1 is the acceleration time during the wire feeding process; t3 is the deceleration time during the wire feeding process; t4 is the acceleration time during the take-up process; and t6 is the deceleration time during the take-up process. Based on the actual amount of line used in the process, the period Np for the waiting angle deflection is obtained, as shown in Formula 6: Np={[n (Ø1+m d) π W3 / (d+W4)] / L3 p (6); In the formula, Ø1 is the diameter of the empty feed reel, d is the diameter of the diamond wire, W3 is the effective winding width of the feed reel, and W4 is the winding spacing of the diamond wire. The deflection P1 is obtained based on the aforementioned parameters. p As shown in Formula 7: P1 p ={(D / 2) / [(Ø1+D) / 2+h]} Np d(7); In the formula, D is the diameter of the wire feeding guide wheel, h is the distance from the bottom of the wire groove of the wire feeding guide wheel to the empty wire feeding wheel, Ø1 is the diameter of the empty wire feeding wheel, and d is the diameter of the diamond wire. The angle θm of the rotation of the wire feeding guide wheel is obtained. p At that time, as shown in Formula 8: θm p =arctan P1 p / (D / 2)(8)。 8. The automatic control method for the wire guide wheel for diamond wire alignment according to claim 6, characterized in that, The deflection P2 of the diamond wire in the take-up reel compartment relative to the take-up guide wheel is obtained. p At that time, including: The deflection amount P2 is obtained. p The required parameters; The parameters include: the waiting angle deflection period Np, the diameter of the empty pay-off spool, the diameter of the take-up guide spool, the diameter of the empty take-up spool, the distance from the bottom of the groove of the take-up guide spool to the empty pay-off spool, and the diameter of the diamond wire. The process of obtaining the period of the waiting angle deflection includes: To obtain the actual amount of thread used in the process after a breakage occurs on the take-up and pay-off reels, see Formula 9: L3 p =1 / 2 a (t1 t1-t4 t4+t3 t3-t6 t6+2t3 t1-2t6 t4)-[(Q1 W1.1+Tz S1+R1 W2.1+Tz S1R1)+(Q2 W1.2+Tz S2+R2 W2.2+Tz S2)...(+Q p W1.p+Tz S p +R p W2. p +Tz S p (9) In the formula, p is the number of times the diamond wire breaks within the processing cycle of the pay-off wheel; W1.1, W1.2…W1. p The outer diameter variation of the take-up / untake-off amount on the take-up reel; W2.1, W2.2…W2. p The amount of wire taken in and out varies with the outer diameter of the wire feeding reel; Q1, Q2...Q p R1, R2...R p Tz is the number of rotations of the take-up reel after the wire breakage; Tz is the diameter of the main roller; t1 is the acceleration time of the wire feeding process; t3 is the deceleration time of the wire feeding process; t4 is the acceleration time of the wire take-up process; and t6 is the deceleration time of the wire take-up process. Based on the actual amount of line used in the process, the period Np of the waiting angle deflection is obtained, as shown in Formula 10: Np={[n (Ø1+m d) π W3 / (d+W4)] / L3 p (10); In the formula, Ø1 is the diameter of the empty feed reel, d is the diameter of the diamond wire, W3 is the effective winding width of the feed reel, and W4 is the winding spacing of the diamond wire. The deflection P2 is obtained based on the aforementioned parameters. p As shown in Formula 11: P2 p ={(D / 2) / [(Ø1+D) / 2+h]} Np d Ø1 / Ø2(11); In the formula, D is the diameter of the take-up guide wheel, h is the distance from the bottom of the groove of the take-up guide wheel to the empty take-up wheel, Ø1 is the diameter of the empty pay-off wheel, Ø2 is the diameter of the empty take-up wheel, and d is the diameter of the diamond wire.

9. The automatic control method for the wire guide wheel for diamond wire alignment according to claim 8, characterized in that, The angle θn of the rotation of the take-up and guide wheel is obtained. p At that time, as shown in Formula 12: θnp=arctan P2 p / (D / 2)(12)。 10. An automatic control system for a wire guide wheel used for diamond wire alignment, characterized in that, include: The wire deflection acquisition unit is used to acquire the number of winding layers m on the wire feeding wheel, and to obtain the deflection P1 of the diamond wire in the wire feeding wheel chamber relative to the wire feeding guide wheel based on the number of winding layers m. The wire feeding control unit is used to obtain the rotation angle θm of the wire feeding guide wheel according to the deflection amount P1, and control the wire feeding guide wheel through the servo motor in the wire feeding wheel chamber based on the deflection period. Take-up deflection acquisition unit: used to acquire the number of winding layers n on the take-up reel, and to obtain the deflection P2 of the diamond wire in the take-up reel compartment relative to the take-up guide wheel based on the number of winding layers n; Take-up control unit: used to obtain the rotation angle θn of the take-up guide wheel according to the deflection amount P2, and control the take-up guide wheel through the servo motor in the take-up wheel chamber based on the deflection period; If a diamond wire breaks during the take-up and release process and the take-up and release are resumed, the release control unit is further configured to obtain the rotation angle θm of the release guide wheel. p The wire feeding guide wheel is controlled by a servo motor in the wire feeding wheel chamber based on the deflection period. The take-up control unit is also used to obtain the rotation angle θn of the take-up guide wheel. p The take-up guide wheel is controlled by a servo motor in the take-up wheel chamber based on the deflection period.

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