CN113652853A

CN113652853A - Width detection device of cut-off knife for cutting bed

Info

Publication number: CN113652853A
Application number: CN202110958046.4A
Authority: CN
Inventors: 张超波; 黄冬; 李永红
Original assignee: Bullmer Electromechanical Technology Co Ltd
Current assignee: Bullmer Electromechanical Technology Co Ltd
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2021-11-16
Anticipated expiration: 2041-08-20
Also published as: CN113652853B

Abstract

The invention provides a width detection device of a cutting knife for a cutting bed, which comprises a linear driving mechanism, a measuring mechanism and a controller, wherein the linear driving mechanism is fixedly installed, the measuring mechanism is a contact type position sensor or a contact type displacement sensor and is installed on the movable end of the linear driving mechanism, the measuring mechanism is driven by the linear driving mechanism to be in contact with the cutting knife, and the controller is respectively connected with a rotating mechanism, the linear driving mechanism and the measuring mechanism. The measuring mechanism is directly contacted with the cutting edge of the cutter, so that the actual width of the cutter can be quickly and accurately measured, the measuring mechanism is not interfered by other environmental factors, and accurate cutter width parameters are provided for the cutting bed, thereby improving the cutting quality of the cutting bed and reducing cutting errors.

Description

Width detection device of cut-off knife for cutting bed

Technical Field

The invention relates to the technical field of garment processing, in particular to a width detection device of a cutter for a cutting bed.

Background

The cutting machine is a large machine tool commonly used in clothing factories and mainly adopts a vibration straight knife to cut fabrics. In the control system of the cutting bed, the cutting track is designed and optimized according to the width of the cutting knife. However, this production method has some problems, if the knife width parameter in the control system is not matched with the actual knife width, it will cause obvious errors in cutting, especially when processing the clothes with high quality requirement, such as underwear, underpants, bra, etc., it will cause the quality problems, such as cutting deviation of the cutting position, nonstandard over cutting, etc.

At present, three methods for detecting the width of the knife are mainly available in the market:

1. according to the empirical value, subtracting a cutter abrasion loss in the control system after finishing grinding the cutter each time;

2. irradiating the blade part of the cutter by using a laser sensor so as to measure the distance; however, because the cutting edge is a line and the contact area is small, the measured data is unstable and the efficiency is low;

3. the method adopts an image recognition technology such as a camera to take a real-time picture of the cutter, then carries out image comparison with a standard cutter picture of a system, and measures the width of the cutter by an image processing technology, but the method has high cost and poor interference resistance.

In summary, the above prior arts cannot accurately know the actual blade width, resulting in a large cutting error. Therefore, how to accurately measure the width value of the cutting knife and reduce the cutting error and the cutting quality caused by inaccurate width value is a technical problem to be solved by those skilled in the art.

Disclosure of Invention

In view of the above-mentioned drawbacks, an object of the present invention is to provide a detection device capable of accurately measuring a width value of a cutter in an existing cutting bed.

The invention provides a width detection device of a cutting knife for a cutting bed, which comprises a rotating mechanism, the cutting knife and a cutter head, wherein the upper end of the cutting knife is connected with the rotating mechanism through a knife fixing mechanism, and the lower end of the cutting knife is positioned in the cutter head; rotary mechanism is through a connecting axle and blade disc fixed connection, cut-off knife and blade disc synchronous revolution still include sharp actuating mechanism, measuring mechanism and controller, sharp actuating mechanism fixed mounting, measuring mechanism is contact position sensor or contact displacement sensor, and it is installed on sharp actuating mechanism's the activity is served sharp actuating mechanism's drive down with the cut-off knife contacts, the controller is connected with rotary mechanism, sharp actuating mechanism, measuring mechanism respectively.

Preferably, the middle part of the connecting shaft is provided with a supporting part, and the cutting knife is arranged in the supporting part in a penetrating manner.

Preferably, the linear drive mechanism is mounted on the housing by a mounting plate.

Preferably, the measuring mechanism is arranged on the fixing plate through an expansion threaded sleeve and a nut, and the fixing plate is detachably connected with the movable end.

Preferably, the linear driving mechanism is a hydraulic cylinder, a lead screw motor or an electromagnet.

Preferably, the linear driving mechanism is an air cylinder, and the movable end is a piston rod.

Preferably, a first magnetic switch for detecting whether the piston rod extends in place and a second magnetic switch for detecting whether the piston rod retracts in place are respectively arranged at the front end and the rear end of the outer side of the cylinder body of the air cylinder, and the first magnetic switch and the second magnetic switch are both connected with the controller.

The measuring mechanism is directly contacted with the cutting edge of the cutter, so that the actual width of the cutter can be quickly and accurately measured, the measuring mechanism is not interfered by other environmental factors, and accurate cutter width parameters are provided for the cutting bed, thereby improving the cutting quality of the cutting bed and reducing cutting errors.

Drawings

FIG. 1 is a schematic view of the operation of the width detection device of the present invention;

FIG. 2 is an exploded view of the width sensing device of the present invention;

FIG. 3 is a flow chart of a method of use of one embodiment of the present invention.

Element number description:

1 rotating mechanism

11 rotating electric machine

12 driving wheel

13 driven wheel

2 cut-off knife

3 cutter head

4 connecting shaft

41 support part

5 Linear driving mechanism

51 movable end

61 first magnetic switch

62 second magnetic switch

7 measuring mechanism

81 expansion thread sleeve

82 fixed plate

83 nut

9 mounting plate

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to limit the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1, the present invention provides a width detection device for a cutting knife for a cutting bed, which includes a rotating mechanism 1, a cutting knife 2 and a cutter head 3, wherein the rotating mechanism 1 includes a rotating motor 11, a driving wheel 12 coaxially connected with an output shaft of the rotating motor 11, and a driven wheel 13 engaged with the driving wheel 12 for transmission. The upper end of the cutting knife 2 is connected with the driven wheel 13 through a knife fixing mechanism, and the lower end is positioned in the cutter head 3. The driven wheel 13 is fixedly connected with the cutter head 3 through a connecting shaft 4, and when the rotating mechanism 1 works and the driven wheel 13 rotates, the cutting knife 2 and the cutter head 3 synchronously rotate. Further, the middle part of the connecting shaft 4 is also provided with a supporting part 41, the cut-off knife 2 is arranged in the supporting part 41 in a penetrating manner, and the supporting part 41 can support the cut-off knife 2 to prevent the cut-off knife 2 from bending and deforming in the working process.

As shown in fig. 1 and 2, the width detection device further includes a linear driving mechanism 5, a measuring mechanism 7 and a controller, wherein the linear driving mechanism 5 is fixedly mounted on the housing through a mounting plate 9, and the position is kept unchanged; the measuring mechanism 7 is a contact position sensor or a contact displacement sensor, is arranged on the movable end 51 of the linear driving mechanism 5, is driven by the linear driving mechanism 5 to be in contact with the cutting knife 2 and measures the width reduction of the cutting knife 2 caused by abrasion; the controller is respectively connected with the rotating motor 11, the linear driving mechanism 5 and the measuring mechanism 7 in the rotating mechanism 1, and can control the rotation of the rotating mechanism 1, the linear movement of the linear driving mechanism 5 and receive the output signal of the measuring mechanism 7 to obtain the actual cutter width value of the cutter 2.

In one embodiment of the present invention, the linear driving mechanism 5 is a cylinder, the movable end 51 is a piston rod, the measuring mechanism 7 is mounted on a fixing plate 82 through an expansion threaded sleeve 81 and a nut 83, and the fixing plate 82 and the piston rod are detachably connected through a screw. The front end and the rear end of the outer side of the cylinder body of the air cylinder are respectively provided with a first magnetic switch 61 for detecting whether the piston rod extends in place or not and a second magnetic switch 62 for detecting whether the piston rod retracts in place or not, and the first magnetic switch 61 and the second magnetic switch 62 are both connected with the controller, so that the situation that the piston rod cannot extend in place due to low air pressure and the like to influence the measurement precision can be prevented; secondly, the rotating mechanism 1 can be prevented from driving the cutter head 3 to rotate when the piston rod is not retracted to the right position, so that the connecting shaft 4 and the piston rod or the measuring mechanism 7 are prevented from colliding. As shown in fig. 3, the working principle of the width detection device of the present invention is as follows:

1. when the cutting of the cut-off knife 2 is finished and the knife width needs to be detected, the controller controls the rotating motor 11 to rotate, so that the cut-off knife 2 reaches a preset position which is vertical to the end face of the measuring head of the measuring mechanism 7, then the air inlet of the air cylinder is ventilated, and the piston rod drives the measuring mechanism 7 to extend out and contact with the cutting edge of the cut-off knife 2; when the first magnetic switch 61 senses the magnetic ring on the piston rod, the extending position of the piston rod is correct, the measuring head of the measuring mechanism 7 is pressed and retracted at the moment, the measuring mechanism 7 outputs a signal to the controller, the width reduction of the cut-off knife 2 caused by abrasion can be obtained after calculation, and the actual knife width value of the cut-off knife 2 is obtained;

2. after the detection is finished, the piston rod retracts, when the second magnetic switch 62 senses the magnetic ring on the piston rod, the piston rod retracts to the right position, the second magnetic switch 62 outputs a signal to the controller, and the controller controls the rotating mechanism 1 to start to drive the cut-off knife 2 to rotate and start the next round of cutting. When the cut-off knife 2 works, the air outlet of the air cylinder is ventilated, the piston rod keeps a retraction state, and the linear driving mechanism 5 or the measuring mechanism 7 is prevented from interfering and colliding with the connecting shaft 4.

A hydraulic cylinder, a lead screw motor or an electromagnet and other equipment can be used as a linear driving mechanism as required by a person skilled in the art, and the purpose of driving the measuring mechanism 7 to be in contact with the cutting edge of the cut-off knife 2 can also be achieved. When the contact type displacement sensor is used as the measuring mechanism 7, the measuring head of the sensor can measure the distance change between the measuring head and the cutting edge of the cut-off knife 2 at a preset position, so that the change quantity of the width value of the cut-off knife 2 is obtained; when the contact position sensor is used as the measuring mechanism 7, the measuring head of the sensor can measure the contact position change between the measuring head and the cutting edge of the cut-off knife 2 at a preset position, so that the change amount of the knife width value of the cut-off knife 2 is obtained.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. The width detection device of the cutting knife for the cutting bed comprises a rotating mechanism (1), the cutting knife (2) and a cutter head (3), wherein the upper end of the cutting knife (2) is connected with the rotating mechanism (1) through a knife fixing mechanism, and the lower end of the cutting knife is positioned in the cutter head (3); rotary mechanism (1) is through a connecting axle (4) and blade disc (3) fixed connection, cut-off knife (2) and blade disc (3) synchronous revolution, its characterized in that still includes sharp actuating mechanism (5), measuring mechanism (7) and controller, sharp actuating mechanism (5) fixed mounting, measuring mechanism (7) are contact position sensor or contact displacement sensor, and it is installed on expansion end (51) of sharp actuating mechanism (5) the drive of sharp actuating mechanism (5) down with cut-off knife (2) contact, the controller is connected with rotary mechanism (1), sharp actuating mechanism (5), measuring mechanism (7) respectively.

2. The width detection device according to claim 1, wherein a support portion (41) is provided at a middle portion of the connection shaft (4), and the cutting knife (2) is inserted into the support portion (41).

3. The width detection device according to claim 1, wherein the linear drive mechanism (5) is mounted on the housing by a mounting plate (9).

4. The width detection device according to claim 1, wherein the measuring mechanism (7) is mounted on a fixed plate (82) by means of an expanding threaded sleeve (81) and a nut (83), the fixed plate (82) being detachably connected to the movable end (51).

5. The width detection device according to claim 1, wherein the linear drive mechanism (5) is a hydraulic cylinder, a lead screw motor or an electromagnet.

6. The width detection device according to claim 1, wherein the linear drive mechanism (5) is a cylinder and the movable end (51) is a piston rod.

7. The width detection device according to claim 6, wherein a first magnetic switch (61) for detecting whether the piston rod extends to the right position and a second magnetic switch (62) for detecting whether the piston rod retracts to the right position are respectively arranged at the front end and the rear end of the outer side of the cylinder body, and the first magnetic switch (61) and the second magnetic switch (62) are both connected with the controller.