Method for automatic control of torque of a carrier tape reel

Abstract

The application discloses a kind of automatic control methods of torque of carrier tape reel, according to the rotation number of material receiving reel and the thickness of carrier tape, the radius of reel circle is calculated, the change of carrier tape front and back angle θ in reel, the speed and torque change difference of reel rotating motor are calculated using cosine theorem angle formula, real-time adjustment is carried out, the tension torque of carrier tape rotation in reel is guaranteed to be consistent, so as to control the tightness state of carrier tape winding in reel to be consistent, prevent extrusion damage product in carrier tape.

Description

Technical Field

[0001] This invention belongs to the field of intelligent chip manufacturing technology, and in particular relates to an automatic torque control method for carrier trays that can automatically adapt and adjust the rotation speed and torque of the carrier tray. Background Technology

[0002] Conventional carrier tape reels take up varying quantities of tape. During take-up, the carrier tape on the reel must be neither too tightly wound, which could cause the chips inside to be crushed and damaged, nor too loosely wound. To meet production requirements and ensure the equipment is compatible with carrier tape reels of different take-up quantities, guaranteeing that the carrier tape is wound with a relatively consistent tension, an adaptive automatic control method is needed to ensure reel quality. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic torque control method for carrier tape reels that can ensure consistent tension and adaptively adjust winding speed and torque for carrier tapes of different lengths.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An automatic torque control method for a carrier tape reel, which controls the reel's rotational speed and torque in real time, is characterized by the following steps: S1: Measure the thickness Bt1 of a single layer of carrier tape, the radius Dr0 of the take-up shaft, the distance L0 from the center of the auxiliary guide wheel to the center of the take-up shaft, the tangent length L1 of the carrier tape on the surfaces of the auxiliary guide wheel and the take-up shaft in the initial state, the tangent length L2 of the carrier tape on the surfaces of the auxiliary guide wheel and the take-up shaft in the current state, count the number of rotations of the material tray Nt1, and obtain the total thickness H1 of the collected carrier tape based on Bt1×Nt1; S2: Cosθ, a function that calculates the included angle θ of the carrier belt change within the tray based on L1 / H1; S3: Set the maximum rotational speed of the tray DrsMax, the minimum rotational speed of the tray DrsMin, the maximum rotational torque of the tray RttMax, and the minimum rotational torque of the tray RttMin; S4: The real-time control speed Drs0 of the material tray rotation is calculated according to the formula Drs0 = (( DrsMax- DrsMin)×Cosθ+ DrsMin)×K, and the real-time control torque Rtt0 of the material tray rotation is calculated according to the formula Rtt0=(RttMax-(RttMax- RttMin)×Cosθ)×K, where K is the compensation numerical slope coefficient.

[0005] Preferred: K=(L0-L1)×(L0-L2) ×Bt1 / Dr0.

[0006] This invention calculates the radius of the material tray based on the number of rotations of the receiving tray and the thickness of the carrier belt. It also calculates the difference in speed and torque of the tray's rotating motor using angle formulas such as the cosine theorem, and makes real-time adjustments to ensure that the tension torque of the carrier belt is consistent during rotation. This controls the tightness of the carrier belt winding in the tray to prevent damage to the product inside the carrier belt. Attached Figure Description

[0007] Figure 1 is a schematic diagram of the changes of the carrier belt on the take-up shaft according to the present invention. Detailed Implementation

[0008] During the material collection process, as the carrier belts are stacked layer by layer, the height of the tangent point between the carrier belt and the material tray and the angle at which the carrier belt is cut and collected also increase. At the same time, the rotation speed and torque of the carrier belt material tray also need to be calculated and adjusted accordingly to control the tightness of the carrier belt winding in the material tray and prevent the product inside the carrier belt from being squeezed and damaged.

[0009] An automatic torque control method for a carrier tape reel, which controls the reel's rotational speed and torque in real time, includes the following steps: S1: As Figure 1 As shown, the thickness Bt1 of a single layer of carrier tape, the radius Dr0 of the take-up shaft, the distance L0 from the center of the auxiliary guide wheel to the center of the take-up shaft, the tangent length L1 of the carrier tape on the surfaces of the auxiliary guide wheel and the take-up shaft in the initial state, the tangent length L2 of the carrier tape on the surfaces of the auxiliary guide wheel and the take-up shaft in the current state, and the number of rotations Nt1 of the counting disc are used to obtain the total thickness H1 of the collected carrier tape based on Bt1×Nt1.

[0010] S2: Cosθ is a function that calculates the included angle θ of the carrier belt change within the tray based on L1 / H1.

[0011] S3: Set the maximum rotational speed of the tray (DrsMax), the minimum rotational speed of the tray (DrsMin), the maximum rotational torque of the tray (RttMax), and the minimum rotational torque of the tray (RttMin).

[0012] S4: The real-time control speed Drs0 of the material tray rotation is calculated according to the formula Drs0 = (( DrsMax- DrsMin)×Cosθ+ DrsMin)×K, and the real-time control torque Rtt0 of the material tray rotation is calculated according to the formula Rtt0=(RttMax-(RttMax- RttMin)×Cosθ)×K, where K is the compensation numerical slope coefficient.

[0013] Preferred: K=(L0-L1)×(L0-L2) ×Bt1 / Dr0.

Claims

1. A method for automatically controlling the torque of a carrier tape reel, which controls the rotational speed and torque of the reel in real time, characterized by Includes the following steps: S1: Measure the thickness Bt1 of a single layer of carrier tape, the radius Dr0 of the take-up shaft, the distance L0 from the center of the auxiliary guide wheel to the center of the take-up shaft, the tangent length L1 of the carrier tape on the surfaces of the auxiliary guide wheel and the take-up shaft in the initial state, the tangent length L2 of the carrier tape on the surfaces of the auxiliary guide wheel and the take-up shaft in the current state, count the number of rotations of the material tray Nt1, and obtain the total thickness H1 of the collected carrier tape based on Bt1×Nt1; S2: Cosθ, a function that calculates the included angle θ of the carrier belt change within the tray based on L1 / H1; S3: Set the maximum rotational speed of the tray DrsMax, the minimum rotational speed of the tray DrsMin, the maximum rotational torque of the tray RttMax, and the minimum rotational torque of the tray RttMin; S4: The real-time control speed Drs0 of the material tray rotation is calculated according to the formula Drs0 = (( DrsMax - DrsMin) × Cosθ + DrsMin) × K, and the real-time control torque Rtt0 of the material tray rotation is calculated according to the formula Rtt0 = (RttMax - (RttMax - RttMin) × Cosθ) × K, where K is the compensation numerical slope coefficient.

2. The tape and reel torque automatic control method of claim 1, wherein: The compensation numerical slope coefficient K = (L0-L1)×(L0-L2) ×Bt1 / Dr0.

Images