CN108045883B

CN108045883B - Transfer conveying control method

Info

Publication number: CN108045883B
Application number: CN201711242061.9A
Authority: CN
Inventors: 郑佳丹
Original assignee: 郑佳丹
Current assignee: Chongqing jiurenjie Intelligent Equipment Technology Co.,Ltd.
Priority date: 2017-11-30
Filing date: 2017-11-30
Publication date: 2020-08-21
Anticipated expiration: 2037-11-30
Also published as: CN108045883A

Abstract

The invention relates to a transfer conveying control method, which comprises the following steps: A. placing the workpiece and detecting the workpiece by an infrared sensor; B. obtaining the time S1 required by the single workpiece to be conveyed on the first conveying device through calculating M/V1; C. the pushing component obtains the time interval for pushing the workpiece according to the calculated time S1; D. a piston rod of the air cylinder pushes the rotating rod to rotate anticlockwise around the fixing rod, then the rotating rod drives the driven rod to move leftwards, the driven rod then pushes the pushing rod to move leftwards along the direction of the sliding rail, and the moving distance of the pushing rod is larger than the width of the first conveying device; E. a piston rod of the air cylinder pulls the pushing rod to move leftwards through a lever mechanism; in step D, the workpiece is pushed from the first conveyor onto the second conveyor and is discharged. The control method has accurate control, reduces errors and mistakes generated by the distance sensor and improves the transmission efficiency.

Description

Transfer conveying control method

Technical Field

The invention relates to the technical field of workpiece conveying.

Background

In the process of workpiece steering transmission, the existing conveying mechanism is a mechanism which continuously works at a constant speed, the blocking mechanism is a mechanism which periodically works in a reciprocating manner, the interval of conveying objects by the blocking mechanism is difficult to be accurately matched with the action period of the pushing mechanism, and the workpieces are easy to cause faults of accumulation, blockage and the like, so that the quality of the workpieces is damaged; when the fault is serious and can not be solved in a short time, the front and the rear processes can only be forced to stop, so that the production is in a stagnation state.

The existing conveying device adopts a distance sensor to sense the distance more, so that the advantage is that the distance sensing is accurate and the error is not easy to occur. However, this method for detecting the position of the workpiece has its drawbacks that if the shape of the workpiece is irregular, the distance sensed by the sensor is deviated, and in addition, if the workpiece rotates or swings on the conveyor belt, the sensor cannot easily detect the true distance and position of the workpiece, the distance signal received by the controller will have errors or even cannot detect the distance of the workpiece, and further, if the probe of the distance sensor is blocked, the detection of the distance of the workpiece is not facilitated. Therefore, for workpieces with irregular shapes or dynamic shapes, the distance between the workpieces cannot be accurately detected, and the controller cannot accurately control the workpieces, so that the phenomenon that the workpieces are stacked or placed in a mess can be formed on the conveying belt.

Disclosure of Invention

In order to overcome the above-mentioned defects in the prior art, an object of the present invention is to provide a transfer control method, which can accurately determine the transport position of a workpiece and automatically and accurately complete the transfer of the workpiece.

The technical scheme for realizing the aim of the invention is as follows:

a transfer transportation control method comprises the following steps,

A. the workpiece is placed or transmitted to the first conveying device and detected by the infrared sensor;

B. setting a conveying line speed V1 of the first conveying device, and obtaining the time S1 required by conveying a single workpiece on the first conveying device by calculating M/V1 according to the conveying distance M on the first conveying device;

C. the pushing component obtains a time interval for pushing the workpiece according to the calculated time S1, wherein the time interval is the same as the value of S1;

D. the controller controls a piston rod of the air cylinder to push the rotating rod to rotate anticlockwise around the fixing rod, then the rotating rod drives the driven rod to move leftwards, the driven rod then pushes the pushing rod to move leftwards along the direction of the sliding rail, and the moving distance of the pushing rod is larger than the width of the first conveying device;

E. the controller controls a piston rod of the air cylinder to retract and drives the rotating rod to rotate clockwise around the fixed rod, the rotating rod drives the driven rod to move rightwards, and the driven rod pulls the pushing rod to move leftwards;

F. the total elapsed time T of steps D and E equals time S1; pushing the workpiece from the first conveyor to the second conveyor in step D;

G. the workpiece is sent out from the second conveying device;

a distance sensor for detecting the distance of the closest workpiece on the first conveying device is arranged on the abutting block of the first conveying device;

after the distance sensor detects the distance of the workpiece closest to the distance sensor, the distance signal N is transmitted to the controller, and the residual time S2 of the workpiece reaching the abutting block is obtained by calculating N/V1; and if the S1 is smaller than the S2, an alarm is given.

The controller compares the times S1 and S2, and if S1 is greater than S2, the operation is normal.

The linear speed of the second conveying device is V2, and V2 is not less than V1.

The dwang is divided into two sections by the dead lever, and a section length that is close to the cylinder is less than a section length that is close to the driven lever.

The cylinder, the dwang, the dead lever and the driven lever constitute a lever mechanism.

The total elapsed time T of steps D and E is one half, one third, or one fourth of the time S1.

Compared with the prior art, the invention has the following beneficial effects:

the control method can well avoid errors caused by the adoption of the distance sensor, is accurate in control, guarantees accurate transfer in the workpiece transfer process while guaranteeing the transfer efficiency, and avoids workpiece accumulation caused by the transfer errors of the workpieces. The conveying time of the workpieces on the first conveying device is longer than the reciprocating motion time interval of the pushing rod, after each workpiece is conveyed to the first conveying device, each workpiece can be accurately pushed to the second conveying device by the pushing rod, and the phenomenon that the workpieces are stacked at the position of the abutting block cannot occur. The structure of the invention can ensure the continuity of conveying and transferring the workpieces, realize the continuity and automation of transferring the workpieces and reduce the error rate.

Drawings

FIG. 1 is a top view of the structure of the present invention;

fig. 2 is a front view of the structure of the present invention.

Detailed Description

The invention is described in further detail below with reference to the figures and the specific embodiments.

Example (b):

referring to fig. 1, a transshipment control method includes the steps of,

A. the workpiece 5 is placed or transmitted to the first conveying device 3 and is detected by the infrared sensor 1;

B. setting a conveying line speed V1 of the first conveying device 3, and obtaining the time S1 required by conveying the single workpiece 5 on the first conveying device 3 by calculating M/V1 according to the conveying distance M on the first conveying device 3; as shown in fig. 1, the conveying distance is a straight distance from the top end of the first conveying device to the abutting block;

C. the pushing component obtains a time interval for pushing the workpiece 5 according to the calculated time S1, wherein the time interval is the same as the value of S1; the pushing assembly comprises a cylinder 61, a fixing rod 62, a rotating rod 63, a driven rod 64 and a pushing rod 65;

D. the controller controls a piston rod of the air cylinder 61 to push the rotating rod 63 to rotate anticlockwise around the fixing rod 62, then the rotating rod 63 drives the driven rod 64 to move leftwards, the driven rod 64 further pushes the pushing rod 65 to move leftwards along the direction of the sliding rail, and the moving distance of the pushing rod 65 is larger than the width of the first conveying device 3; the width refers to the transverse distance between the two limiting plates of the first conveying device in the state shown in fig. 1;

E. the controller controls the piston rod of the air cylinder 61 to retract and drives the rotating rod 63 to rotate clockwise around the fixing rod 62, the rotating rod 63 drives the driven rod 64 to move rightwards, and the driven rod 64 pulls the pushing rod 65 to move leftwards;

F. the total elapsed time T of steps D and E equals time S1; in step D, the workpiece 5 is pushed from the first conveyor 3 onto the second conveyor 4;

G. the workpiece 5 is delivered from the second conveying device 4.

Preferably, a distance sensor 2 for detecting the distance on the first conveyor 3 closest to the workpiece 5 is provided on the abutment block 7 of the first conveyor 3.

Further, after the distance sensor 2 detects the distance of the workpiece 5 closest to the distance sensor 2, the distance signal N is transmitted to the controller, and the remaining time S2 of the workpiece 5 reaching the abutting block 7 is obtained by calculating N/V1; comparing the time S1 and the time S2 by the controller, and if the time S1 is greater than the time S2, normally operating; and if the S1 is smaller than the S2, an alarm is given. After the infrared sensor 1 detects the workpiece, the controller transmits the signal to the distance sensor 2, the distance sensor starts to detect the position of the workpiece, as shown in fig. 1, the distance sensor detects the workpiece closest to the abutting block on the first conveying device, therefore, the distance from the distance sensor to the workpiece is certainly smaller than the conveying distance M, therefore, the calculated time S1 is certainly larger than or equal to S2, if the calculated S1 is smaller than S2, it is indicated that the signal detected by S1 is wrong, the workpiece is not conveyed on the first conveying device, or the infrared sensor fails, an alarm is given.

The linear speed of the second conveyor 4 is V2, and V2 is not less than V1. Because the transmission line speed of the second transmission device is higher than that of the first transmission device, the workpieces are transmitted on the second transmission device at a higher speed, and the separation among the workpieces is accelerated.

As shown in fig. 2, the rotating lever 63 is divided into two sections by the fixing lever 62, and a section near the cylinder 61 is shorter than a section near the driven lever 64. Therefore, the pushing assembly forms a labor-saving lever, the stroke of the piston rod of the air cylinder is increased due to the action of the lever, and the stroke of the pushing rod is larger than that of the piston rod of the air cylinder.

The cylinder 61, the rotating rod 63, the fixing rod 62 and the driven rod 64 constitute a lever mechanism.

The total time T of the step D and the step E is half, one third or one fourth of the time S1, even the time of the reciprocating motion of the piston rod of the air cylinder is only within 5 seconds, and the workpiece is rapidly pushed and transferred by rapid reciprocating motion.

According to the invention, when a workpiece enters the first conveying device for conveying, the infrared sensor detects that an object passes through, the signal is transmitted to the controller, and the controller controls the reciprocating motion of the piston rod of the cylinder according to the reciprocating period of the piston rod of the cylinder by taking the time S1 as the reciprocating period of the piston rod of the cylinder, so that the workpiece is pushed away by the pushing rod when reaching the abutting block and cannot stop at the abutting block, and the motion of the pushing assembly can be automatically controlled without arranging the infrared sensor at the abutting block. The distance sensor is used for detection and comparison, is used for alarm detection and is not used as a source of a control signal. Therefore, the control method of the invention can know the reciprocating period of the pushing assembly according to the set distance and speed, is convenient to use and has more accurate movement of the pushing assembly.

In the conveying time S1 of a workpiece on the first conveying device, a new workpiece is placed on the first conveying device, which requires the reciprocating period of the push lever to be shortened to half or one third of S1, or even shorter, to match the conveying interval of the workpiece.

The present invention is not limited to the above embodiments, and various other modifications, substitutions and alterations can be made without departing from the basic technical concept of the present invention by the common technical knowledge and conventional means in the field according to the above content of the present invention.

Claims

1. A transfer conveying control method is characterized in that: comprises the following steps of (a) carrying out,

A. the workpiece (5) is placed or transmitted to the first conveying device (3) and is detected by the infrared sensor (1);

B. setting a conveying line speed V1 of the first conveying device (3), and obtaining the time S1 required by conveying the single workpiece (5) on the first conveying device (3) by calculating M/V1 according to the conveying distance M on the first conveying device (3);

C. the pushing component obtains a time interval for pushing the workpiece (5) according to the calculated time S1, wherein the time interval is the same as the value of S1;

D. the controller controls a piston rod of the air cylinder (61) to push the rotating rod (63) to rotate anticlockwise around the fixing rod (62), then the rotating rod (63) drives the driven rod (64) to move leftwards, the driven rod (64) pushes the pushing rod (65) to move leftwards along the direction of the sliding rail, and the moving distance of the pushing rod (65) is larger than the width of the first conveying device (3);

E. the controller controls a piston rod of the air cylinder (61) to retract and drives the rotating rod (63) to rotate clockwise around the fixed rod (62), the rotating rod (63) drives the driven rod (64) to move rightwards, and the driven rod (64) pulls the pushing rod (65) to move leftwards;

F. the total elapsed time T of steps D and E equals time S1; in step D, the workpiece (5) is pushed from the first conveying device (3) to the second conveying device (4);

G. the workpiece (5) is sent out from the second conveying device (4);

a distance sensor (2) for detecting the distance on the first conveying device (3) closest to the workpiece (5) is arranged on the abutting block (7) of the first conveying device (3);

after the distance sensor (2) detects the distance of the workpiece (5) closest to the distance sensor (2), the distance signal N is transmitted to the controller, and the residual time S2 of the workpiece (5) reaching the abutting block (7) is obtained by calculating N/V1; the controller compares the time S1 and S2, and if S1 is smaller than S2, an alarm is given.

2. A method of controlling transshipment according to claim 1, wherein: the controller compares the times S1 and S2, and if S1 is greater than S2, the operation is normal.

3. A method of controlling transshipment according to claim 1, wherein: the linear speed of the second conveying device (4) is V2, and V2 is not less than V1.

4. A method of controlling transshipment according to claim 1, wherein: the rotating rod (63) is divided into two sections by the fixing rod (62), and the length of one section close to the cylinder (61) is smaller than that of one section close to the driven rod (64).

5. A transport control method according to claim 4, characterized in that: the cylinder (61), the rotating rod (63), the fixing rod (62) and the driven rod (64) form a lever mechanism.

6. A method of controlling transshipment according to claim 1, wherein: the total elapsed time T of steps D and E is one half, one third, or one fourth of the time S1.