CN117361202A - Strip trimming device and control method thereof - Google Patents

Abstract

The invention discloses a strip trimming device and a control method thereof, and relates to the technical field of strip steel processing, wherein the strip trimming device comprises: the first tension roller and the second tension roller are arranged in parallel; at least one trimming mechanism having a trimming member disposed between the first tension roller and the second tension roller; after passing through the side wall of the first tension roller, at least one side of the strip is longitudinally sheared by the edge cutting piece and then passes through the side wall of the second tension roller to be output; wherein the first tension roller, the second tension roller and the cutterhead are respectively positioned on different surfaces of the strip material; the diameters of the middle parts of the side walls of the first tension roller are gradually reduced towards the two sides; the diameters of the middle parts of the side walls of the second tension roller are gradually reduced towards the two sides. The method and the device can solve the problems that the trimming is poor and the width and the size precision of the strip are affected in the shearing process of the strip.

Description

Strip trimming device and control method thereof

Technical Field

The invention relates to the technical field of strip steel processing, in particular to a strip material trimming device and a strip material trimming control method.

Background

In the longitudinal shearing operation of a strip production unit, when the strip is sheared by the longitudinal shearing disc shears, the two cutterheads have a transverse force extrusion effect on the strip, so that the strip is slightly arched in the middle, and the defects of poor strip trimming and influenced strip width and size precision are caused. This phenomenon is particularly pronounced in metal strips such as strip steel. The defect is generated on one hand because the strip is easy to deform under the opposite extrusion of the cutter head, and on the other hand, the operation that the cutter head cannot realize shearing is often generated after the strip is extruded.

In addition, the lower the strength of the strip materials such as strip steel is, the more easily the defect of edge burrs is generated in the shearing process, and the problems of edge cracking, strip breakage, incapability of cutting and the like are possibly caused by the transverse force extrusion and transverse displacement of the strip materials, a large tension mechanism used for fixing the strip steel and the like in the longitudinal edge cutting process aiming at the metal strip materials with parts which are brittle at normal temperature, so that the actual production efficiency is influenced.

Disclosure of Invention

In order to overcome the defects in the prior art, the technical problem to be solved by the embodiment of the invention is to provide a strip trimming device and a control method thereof, which can solve the problems of poor trimming and affected strip width and dimension precision in the strip shearing process.

The specific technical scheme of the embodiment of the invention is as follows:

a trimming device for a strip, the trimming device comprising:

the first tension roller and the second tension roller are arranged in parallel;

at least one trimming mechanism having a trimming member disposed between the first tension roller and the second tension roller; after the strip material passes through the upper side of the side wall of the first tension roller in a clinging manner, at least one side of the strip material is longitudinally sheared by the trimming piece and then is output after passing through the upper side of the side wall of the second tension roller in a clinging manner; the diameters of the middle parts of the side walls of the first tension roller are gradually reduced towards the two sides; the diameters of the middle parts of the side walls of the second tension roller are gradually reduced towards the two sides.

Preferably, the middle part of the side wall of the first tension roller is gradually reduced in diameter to two sides so that the inclination of two ends of the side wall of the first tension roller is between 1 degree and 15 degrees; and/or the number of the groups of groups,

the middle part of the side wall of the second tension roller gradually reduces to two sides in diameter so that the inclination of the two ends of the side wall of the second tension roller is between 1 degree and 15 degrees.

Preferably, the inclination of the two ends of the side wall of the first tension roller is equal to the inclination of the two ends of the side wall of the second tension roller.

Preferably, the trimming member is a trimming disc shear having a shearing direction capable of a shearing angle of between-1 ° and 1 ° to the normal of the strip surface.

Preferably, the trimming device of the strip comprises:

the strip limiting mechanism at least comprises six pairs of pinch rolls, namely a first pair of pinch rolls, a second pair of pinch rolls, a third pair of pinch rolls, a fourth pair of pinch rolls, a fifth pair of pinch rolls and a sixth pair of pinch rolls; wherein, in the moving direction of the strip, the first pair of pinch rollers and the second pair of pinch rollers are positioned between the first tension roller and the trimming member, and respectively pinch the two ends of the strip;

in the moving direction of the strip, the third pair of pinch rolls and the fourth pair of pinch rolls are positioned between the second tension roll and the trimming piece and respectively clamp and send two ends of the trimmed strip;

in the moving direction of the strip, the fifth pair of pinch rollers and the sixth pair of pinch rollers are located between the first pair of pinch rollers, the second pair of pinch rollers and the third pair of pinch rollers, and the fourth pair of pinch rollers, in the width direction of the strip, when two trimming mechanisms with trimming members are provided, and when two trimming members respectively perform longitudinal shearing operations on both ends of the strip, the fifth pair of pinch rollers and the sixth pair of pinch rollers are located between the two trimming members, and the fifth pair of pinch rollers and the sixth pair of pinch rollers are located on the left half side and the right half side of the strip, respectively.

Preferably, the inclination of the axes of the six pairs of pinch rollers is equal to the inclination of both ends of the side wall of the first tension roller.

Preferably, each pair of the pinch rollers comprises: the belt material passes between the upper pressing roller and the lower carrier roller; the upper press roll mounting frame is provided with an upper press roll; the lower carrier roller mounting frame is provided with a lower carrier roller;

the tape stop mechanism further comprises: an upper press roll bracket; the upper hydraulic telescopic unit is connected between the upper press roll bracket and the upper press roll mounting frame and is used for adjusting the inclination of the upper press roll bracket through telescopic action; a lower carrier roller bracket; the lower hydraulic telescopic unit is connected between the lower carrier roller support and the lower carrier roller mounting frame and is telescopic to adjust the gradient of the lower carrier roller mounting frame.

Preferably, the inclination of the lower carrier roller mounting frame is changed through the lower hydraulic telescopic unit or the inclination of the upper compression roller support is changed through the upper hydraulic telescopic unit, so that the pressure on the half side of the strip is changed, and the strip is guided and rectified.

Preferably, the tape limiting mechanism further comprises:

and the angle detection device is used for detecting the inclination of the upper compression roller mounting frame and/or the lower carrier roller mounting frame.

Preferably, the trimming device of the strip further comprises:

and a heating unit positioned upstream of the trimming member in the moving direction of the strip and used for carrying out zone heating on the strip in the width direction so that the temperature of the edge area of the strip is higher than that of the middle area of the strip.

Preferably, the temperature of the edge region of the strip is 150 degrees or less higher than the temperature of the middle region of the strip, and the position where the strip is sheared by the trimming member is located in the edge region.

Preferably, when the trimming mechanism adopts a disc trimming mechanism, the setting value of the lateral clearance value GAP of the trimming mechanism is specifically as follows:

the setting value of the cutting edge overlapping degree LAP of the edge cutting mechanism is specifically as follows:

wherein h represents the thickness of the strip in millimeters; a. b, c and d represent calculation and experience coefficients, and are respectively selected by comprehensively judging parameters of the strip strength, the cutting length, the thickness and the burr length; l (L) ₁ And l ₂ The section structural parameters of the section are comprehensively determined by the length of the L1 stuffing pressing area, the length of the L2 cutting area and the length of the L3 tearing area.

Preferably, when the strip is strip steel, l ₁ And l ₂ Referring to table 1 for specific values of (c),

table 1 calculation and empirical parameter/comparison Table

Length of L1 stuffing pressing zone/length of L2 cutting zone	l 1
		0～0.1	1.1
0.1-0.5	1
		0.5～0.7	0.8
0.7～1	0.7
		>1	0.5
		Length of L2 cut/length of L3 tear	l 2
0～1	0.5
		1～2	1
2～5	1.1
		>5	1.2

；

a. Specific values of b, c, d are referred to tables 2 to 5,

table 2 calculation and empirical parameter a comparison table

Table 3 calculation and empirical parameter b comparison Table

Table 4 comparison table of calculated and empirical parameters c

Thickness mm	c 1
		0.3-0.7	0
0.7-1.3	0.46
		1.4-2.8	0.16
2.9-3.3	0
Cutting length km	c 2
		0-20	1
20-80	1.02
		80-120	1.05

Table 5 calculation and empirical parameter d comparison Table

Preferably, after the set value of the lateral clearance value GAP of the trimming mechanism and the set value of the shear edge overlapping degree LAP of the trimming mechanism are determined, trial trimming is performed, the new set value of the lateral clearance value GAP of the trimming mechanism and the set value of the shear edge overlapping degree LAP of the trimming mechanism are further iteratively determined according to the result parameters of the trial trimming, and then the equipment parameters of the trimming mechanism are readjusted.

A method of controlling a trimming device for a strip, the method comprising:

acquiring parameter information of the strip, wherein the parameter information comprises steel grade, yield strength, tensile strength, thickness, cutting length, L1 stuffing pressing area length, L2 cutting area length, L3 tearing area length, L4 burr area length and cutting length of the strip;

and obtaining a lateral clearance value GAP of the trimming mechanism and a shearing edge overlapping degree LAP of the trimming mechanism according to the parameter information of the strip, wherein the calculation process of the lateral clearance value GAP of the trimming mechanism is specifically as follows:

the calculating process of the cutting edge overlapping degree LAP of the edge cutting mechanism specifically comprises the following steps:

wherein h represents the thickness of the strip in millimeters; a. b, c and d represent calculation and experience coefficients, and are respectively selected by comprehensively judging parameters of the strip strength, the cutting length, the thickness and the burr length; l (L) ₁ And l ₂ Representing the structural parameters of the section, and comprehensively determining the length of the L1 stuffing pressing area, the length of the L2 cutting area and the length of the L3 tearing area;

adjusting parameters of the trimming mechanism to the calculated lateral clearance value GAP of the trimming mechanism and the calculated shearing edge overlapping degree LAP of the trimming mechanism, and then performing trial trimming;

and further iteratively determining a new lateral clearance value GAP of the trimming mechanism and a new shear edge overlapping degree LAP of the trimming mechanism according to the result parameters of the trial trimming, adjusting the parameters of the trimming mechanism to the new lateral clearance value GAP of the trimming mechanism and the new shear edge overlapping degree LAP of the trimming mechanism, and circulating in such a way until the quality of the strip after trimming meets the requirements, and then starting the formal trimming.

The technical scheme of the invention has the following remarkable beneficial effects:

because the middle part of the lateral wall of first tension roller reduces to both sides diameter gradually, the middle part of the lateral wall of second tension roller reduces to both sides diameter gradually, and first tension roller the second tension roller is hugged closely the strip and is played the supporting role to the strip, under above-mentioned structure, the shape of the cross section of strip also can with first tension roller the lateral wall assorted of second tension roller, so, the strip first tension roller the position on the second tension roller is relatively stable, consequently can reduce limit portion tension under the prerequisite that reduces the fixed tension demand of strip, prevent to appear the edge crack and the emergence of broken area when being cut by trimming mechanism to carry out longitudinal shearing operation.

Specific embodiments of the invention are disclosed in detail below with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not limited in scope thereby. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments in combination with or instead of the features of the other embodiments.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present invention, and are not particularly limited. Those skilled in the art with access to the teachings of the present invention can select a variety of possible shapes and scale sizes to practice the present invention as the case may be.

FIG. 1 is a top view of a strip trimming apparatus according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the first tension roller at A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken at B-B of FIG. 1;

FIG. 4 is a cross-sectional view taken at C-C of FIG. 1;

FIG. 5 is a schematic cross-sectional view of a band after shearing in an embodiment of the present invention;

fig. 6 is a logic diagram of automatic GAP and LAP detection control in an embodiment of the present invention.

Reference numerals of the above drawings:

1. an upper hydraulic telescoping unit; 2. an upper press roll bracket; 3. a strip; 4. a trimming mechanism; 5. a lower carrier roller; 6. a lower hydraulic telescoping unit; 7. an upper press roll; 8. an angle detection device; 9. a first tension roller; 10. a heating unit; 11. a roller sleeve; 12. a rigid mandrel; 13. a second tension roller; 14. pinch rolls; 15. trimming parts; 16. an upper press roll mounting frame; 17. a lower carrier roller mounting frame; 18. and a lower carrier roller bracket.

Detailed Description

The details of the invention will be more clearly understood in conjunction with the accompanying drawings and description of specific embodiments of the invention. However, the specific embodiments of the invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Given the teachings of the present invention, one of ordinary skill in the related art will contemplate any possible modification based on the present invention, and such should be considered to be within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, may be in communication with each other in two elements, may be directly connected, or may be indirectly connected through an intermediary, and the specific meaning of the terms may be understood by those of ordinary skill in the art in view of the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In order to solve the problem that the strip material is poor in trimming and the width and dimensional accuracy of the strip material are affected in the cutting process, a strip material trimming device is provided in the present application, fig. 1 is a top view of a strip material trimming device according to an embodiment of the present invention, fig. 2 is a cross-sectional view of a first tension roller 9 at A-A in fig. 1, and as shown in fig. 1 and 2, the strip material trimming device may include: a first tension roller 9 and a second tension roller 13; the trimming mechanism 4 has a trimming member 15. Wherein the first tension roller 9 and the second tension roller 13 are arranged in parallel, and are arranged in parallel in the moving direction of the strip 3. The axial directions of the first tension roller 9 and the second tension roller 13 may be parallel to each other so that the strip 3 passes the side walls of the first tension roller 9 and the second tension roller 13, and the strip 3 is located above the side walls of the first tension roller 9 and the second tension roller 13.

At least one trimming mechanism 4 with a trimming member 15 is arranged between the first tension roller 9 and the second tension roller 13, the trimming mechanism 4 being adapted to perform a longitudinal shearing operation on the edge of at least one side of the strip 3. When it is desired to perform a longitudinal shearing operation on the edges of the strip 3 on both sides, two trimming mechanisms 4 with trimming members 15 may be provided. The edge slitting means 4 each having the edge slitting member 15 performs a longitudinal shearing operation on the edge of one side of the strip material 3. The two trimming mechanisms 4 with the trimming members 15 can be arranged opposite each other so as to perform a longitudinal shearing operation on the edges of the strip 3 on both sides at the same time.

After passing the side wall of the first tension roller 9, the strip 3 is cut longitudinally by the edge cutting member 15 on at least one side of the strip 3, and then passes the side wall of the second tension roller 13 and is output. Generally, the first tension roller 9, the second tension roller 13 are positioned below the lower surface of the strip 3 to act as a support for the strip 3.

Wherein the middle of the side wall of the first tension roller 9 gradually decreases in diameter to both sides. The middle of the sidewall of the second tension roller 13 gradually decreases in diameter to both sides. Because the first tension roller 9 and the second tension roller 13 are tightly attached to the strip 3 to support the strip 3, the shape of the cross section of the strip 3 is matched with the side walls of the first tension roller 9 and the second tension roller 13 under the structure, so that the positions of the strip 3 on the first tension roller 9 and the second tension roller 13 are relatively stable, the edge tension can be reduced on the premise of reducing the fixed tension requirement of the strip 3, and the occurrence of edge breakage and belt breakage during the longitudinal shearing operation by the edge cutting mechanism 4 is prevented.

In some embodiments, the middle of the sidewall of the first tension roller 9 is tapered to have a diameter that is between 1 degree and 15 degrees at both ends of the sidewall of the first tension roller 9. Likewise, the middle portion of the side wall of the second tension roller 13 is gradually reduced in diameter to both sides so that the inclination of both ends of the side wall of the second tension roller 13 is between 1 degree and 15 degrees. The inclination of the side walls of the first tension roller 9 and the second tension roller 13 is not easily too great, which would otherwise cause creasing of the strip 3.

In some embodiments, the inclination of the two ends of the side wall of the first tension roller 9 and the inclination of the two ends of the side wall of the second tension roller 13 may be substantially equal.

As shown in fig. 2, the first tension roller 9 and the second tension roller 13 may include a rigid mandrel 12 and a roller sleeve 11 that is wrapped or sleeved outside the rigid mandrel 12, respectively, and the diameter of the middle portion of the outer sidewall of the roller sleeve 11 gradually decreases toward both sides.

In some embodiments, the trim piece 15 may employ trim disc shears. The shearing direction of the edge-cutting rotary shears can be at a shearing angle of between-1 ° and 1 ° to the surface normal of the strip 3. The structure can be matched with the first tension roller 9 and the second tension roller 13 with different inclinations, so that the problems that the trimming low-strength metal strip is easy to generate edge burr defects and the high-strength metal strip is easy to generate edge cracks are further solved.

In some embodiments, the trimming device of the strip material may include: and a belt material limiting mechanism. The tape stopper mechanism is used for further controlling the advancing position of the tape 3 in the width direction thereof, preventing the occurrence of the offset. Fig. 3 is a cross-sectional view at B-B in fig. 1, fig. 4 is a cross-sectional view at C-C in fig. 1, and the strip stop mechanism includes at least six pairs of pinch rolls 14, a first pair of pinch rolls 14, a second pair of pinch rolls 14, a third pair of pinch rolls 14, a fourth pair of pinch rolls 14, a fifth pair of pinch rolls 14, and a sixth pair of pinch rolls 14, as shown in fig. 1, 3, and 4. Wherein the first pair of pinch rollers 14 and the second pair of pinch rollers 14 are located between the first tension roller 9 and the trimming member 15 in the moving direction of the strip 3, and pinch both ends of the strip 3, respectively. The third pair of pinch rollers 14 and the fourth pair of pinch rollers 14 are located between the second tension roller 13 and the trimming member 15 in the moving direction of the strip 3, and pinch both ends of the trimmed strip 3, respectively. The fifth and sixth pairs of pinch rolls 14, 14 are located between the first and second pairs of pinch rolls 14, 14 and the third and fourth pairs of pinch rolls 14, 14 in the direction of movement of the strip 3. In the width direction of the strip 3, when there are two trimming mechanisms 4 having trimming members 15, and the two trimming members perform the longitudinal shearing operation on both ends of the strip 3, respectively, the fifth pair of pinch rollers 14 and the sixth pair of pinch rollers 14 are located between the two trimming members 15, and the fifth pair of pinch rollers 14 and the sixth pair of pinch rollers 14 are located on the left half side and the right half side of the strip 3, respectively.

In some embodiments, as shown in fig. 4, the width of the strip 3 may exceed the spacing between the first pair of pinch rollers 14 and the second pair of pinch rollers 14. After longitudinal shearing by the trimming member 15, the strip 3 may have a width less than the spacing between the first pair of pinch rollers 14 and the second pair of pinch rollers 14, as shown in fig. 3.

With the above structure, the pinch rolls 14 are provided to limit the respective sides of the strip 3 before and after the edges of the strip 3 are cut longitudinally by the trimming member 15, and the pinch rolls 14 are provided to limit the respective sides of the middle region between the cut portions of the strip 3 when the strip 3 is cut. The six pairs of pinch rollers 14 can further reduce the fixed tension requirement of the strip 3, and can prevent the strip 3 from being extruded and laterally displaced by lateral force generated in the process of shearing edges of the strip 3 by the edge shearing members 15, thereby relieving the problem that the low-strength metal strip is easy to generate edge burr defects and the high-strength metal strip is easy to generate edge cracks when the strip 3 is sheared.

In some embodiments, the inclination of the axes of the six pairs of pinch rollers 14 may be equal to the inclination of the two ends of the side wall of the first tension roller 9. Wherein three pairs of pinch rolls 14 are positioned on the left side of the center line of the strip 3, three pairs of pinch rolls 14 are positioned on the right side of the center line of the strip 3, and the inclination of the three pairs of pinch rolls 14 on the left side of the center line of the strip 3 is equal to the inclination of the left side wall of the first tension roll 9; the inclination of the three pairs of pinch rolls 14 to the right of the centre line of the strip 3 is equal to the inclination of the right side wall of the first tension roll 9. In this way, the left and right sides of the entire strip 3 are thus kept flat, respectively, so that the edges of the strip 3 are sheared longitudinally through the trimming members 15.

In some embodiments, each pair of pinch rollers 14 includes: an upper press roller 7 and a lower carrier roller 5, and the strip 3 passes between the upper press roller 7 and the lower carrier roller 5; an upper press roller mounting frame 16, the upper press roller 7 being mounted on the upper press roller mounting frame 16; the lower carrier roller mounting frame 17, the lower carrier roller 5 is mounted on the lower carrier roller mounting frame 17. The tape stop mechanism may comprise: an upper press roller bracket 2; an upper hydraulic telescoping unit 1 connected between the upper press roll bracket 2 and the upper press roll mounting frame 16, the upper hydraulic telescoping unit 1 adjusting the inclination of the upper press roll bracket 2 by telescoping; a lower idler bracket 18; the lower hydraulic telescoping unit 6 is connected between the lower carrier roller bracket 18 and the lower carrier roller mounting frame 17, and the lower hydraulic telescoping unit 6 adjusts the inclination of the lower carrier roller mounting frame 17 by telescoping.

For example, in some embodiments, the upper hydraulic telescopic unit 1 may be one, one end of the upper hydraulic telescopic unit 1 is hinged to the upper press roll bracket 2, and the other end of the upper hydraulic telescopic unit 1 is hinged to the upper press roll mounting frame 16. The upper press roller bracket 2 and the upper press roller mounting frame 16 are hinged directly or indirectly through a connecting piece. When the upper hydraulic telescoping unit 1 stretches, the inclination of the upper press roller bracket 2 is controlled, and the inclination of the upper press roller 7 is controlled. In other embodiments, there may be two upper hydraulic telescopic units 1, one end of one upper hydraulic telescopic unit 1 is hinged to the upper press roller support 2, the other ends of the two upper hydraulic telescopic units 1 are hinged to the upper press roller mounting frame 16, and one end of the other upper hydraulic telescopic unit 1 may be fixedly connected to the upper press roller support 2 or may be hinged to the other end of the other upper hydraulic telescopic unit.

In some embodiments, the lower hydraulic telescoping unit 6 may be mounted in a similar manner to the upper hydraulic telescoping unit 1. In other possible embodiments, the lower idler cradle 18 may extend in a vertical direction with its upper end hinged to one end of the lower idler mount 17. One end of the lower hydraulic telescopic unit 6 is hinged to the other end of the lower carrier roller mounting frame 17, and the other end of the lower hydraulic telescopic unit 6 is hinged to the lower carrier roller bracket 18. In the above manner, the lower hydraulic telescoping unit 6 can also adjust the inclination of the lower carrier roller mounting frame 17 by telescoping.

The inclination of the lower carrier roller mounting frame 17 is changed through the lower hydraulic telescopic unit 6 or the inclination of the upper compression roller support 2 is changed through the upper hydraulic telescopic unit 1, so that the pressure on the half side of the strip 3 is changed, and the strip 3 is guided and rectified. The strip 3 can be controlled to be displaced to the left or to the right in the manner described above.

In some embodiments, the tape stop mechanism may comprise: and the angle detection device 8 is used for detecting the inclination of the upper compression roller mounting frame 16 and/or the lower carrier roller mounting frame 17. For example, the angle detection device 8 may be mounted at a position where the upper end of the lower idler cradle 18 is hinged to one end of the lower idler mount 17, so as to facilitate detection of the inclination of the idler mount. The inclination of the upper roller support 16 and/or the lower roller support 17 can be adjusted precisely by means of the angle detection device 8.

In some embodiments, the trimming device of the strip material may include: a heating unit 10 upstream of the trimming member 15 in the direction of movement of the strip 3. The heating unit 10 is used for zone-heating the strip 3 in the width direction so that the temperature of the edge region of the strip 3 is higher than the temperature of the middle region of the strip 3. The heating unit 10 may extend in the width direction of the strip 3, and the heating unit 10 may cover the entire strip 3 in the width direction of the strip 3. When the strip material 3 has electromagnetic induction properties, the heating unit 10 may heat the strip material 3 in zones in a heating form of electromagnetic induction to control the temperature of different regions of the strip material 3. In other embodiments, the heating unit 10 may also heat the strip material 3 by flame heating in zones to finely control the temperature of different regions of the strip material 3.

By the heating unit 10, the temperature of the edge region of the strip 3, in which the position where the strip 3 is sheared by the trimming member 15 is located, can be made higher than the temperature of the middle region of the strip 3 by 150 degrees or less. By the mode, the tension at the edge of the strip 3 can be effectively reduced, and the risks of edge cracking and strip breakage are reduced; further, the tension requirement of the fixed strip 3 can be reduced, and the risk that the strip is broken easily when the metal strip is brittle at normal temperature is reduced.

In some embodiments, when the trimming mechanism 4 employs a disc trimming mechanism 4, the trimming mechanism 4 comprises a magazine with disc shears and the trimming member 15 comprises disc shears.

The set value of the lateral clearance value GAP of the trimming mechanism 4 may be specifically as follows:

the setting value of the blade overlap LAP of the edge slitting mechanism 4 is specifically as follows:

wherein h represents the thickness of the strip in millimeters; a. b, c and d represent calculation and experience coefficients, and are respectively selected by comprehensively judging parameters of the strip strength, the cutting length, the thickness and the burr length; l (L) ₁ And l ₂ The parameters of the section plane are comprehensively determined by the length of the L1 stuffing pressing area, the length of the L2 cutting area and the length of the L3 tearing area, and fig. 5 is a schematic diagram of the section plane structure of the sheared belt material in the embodiment of the invention, wherein L1-L4 is shown in fig. 5, L4 represents the length of the burr area, and L=L1+L2+L3=h.

Further, when the strip 3 is a strip steel, l ₁ And l ₂ Referring to table 1 for specific values of (c),

table 1 calculation and empirical parameter/comparison Table

a. Specific values of b, c, d can be found in tables 2 to 5,

table 2 calculation and empirical parameter a comparison table

Mpa	Strength of	a 1
			<220	Low and low	0.1
220-300	In (a)	0.11
			>300	High height	0.12
				Thickness of strip steel is mm	a 2
	0.3-2.6	1
				2.7-3.3	0
				Cutting length km	a 3
	0-20	1
				20-80	0.95
	80-120	0.9

Table 3 calculation and empirical parameter b comparison Table

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Table 4 comparison table of calculated and empirical parameters c

Table 5 calculation and empirical parameter d comparison Table

Fig. 6 is a logic diagram of automatic detection control of GAP and LAP in the embodiment of the present invention, as shown in fig. 6, when the set value of the lateral clearance value GAP of the trimming mechanism 4 and the set value of the overlapping degree LAP of the cutting edge of the trimming mechanism 4 are determined, the trial trimming is performed. The trimming quality of the strip is detected through the sensor, and when the trimming quality of the strip does not meet the requirement, the set value of the lateral clearance value GAP of the new trimming mechanism 4 and the set value of the shearing edge overlapping degree LAP of the trimming mechanism 4 are further and iteratively determined according to the result parameters of the trial trimming. According to the new setting value of the lateral clearance value GAP of the trimming mechanism 4 and the setting value of the shearing edge overlapping degree LAP of the trimming mechanism 4, the equipment parameters of the trimming mechanism 4 are automatically and again adjusted, and then trimming is carried out, so that the setting value of the lateral clearance value GAP of the trimming mechanism 4 and the setting value of the shearing edge overlapping degree LAP of the trimming mechanism 4 can be continuously and circularly optimized until the quality after trimming of the strip meets the requirements, and then formal trimming is started. The equipment parameters of the closed-loop control trimming mechanism 4 can improve the trimming quality of the strip, further relieve the problems that the trimming low-strength metal strip is easy to generate edge burr defects and the high-strength metal strip is easy to generate edge cracks, and is particularly suitable for strip steel.

In some embodiments, before setting the lateral clearance GAP of the trimming mechanism 4 and the overlap LAP of the cutting edges of the trimming mechanism 4, the inclination of the trimming disc shears and the inclination of the pinch rolls 14 in the strip stop mechanism are adjusted according to the fit between the first tension roll 9, the second tension roll 13 and the strip.

In the present application, a method for controlling a trimming device for a strip is also provided, and the method for controlling a trimming device for a strip may include the steps of:

and obtaining parameter information of the strip, wherein the parameter information comprises the type, yield strength, tensile strength, thickness, cutting length, length of an L1 stuffing pressing area, length of an L2 cutting area, length of an L3 tearing area, length of an L4 burr area and cutting length of the strip.

The lateral clearance value GAP of the edge cutting mechanism 4 and the shear edge overlapping degree LAP of the edge cutting mechanism 4 are obtained according to the parameter information of the strip, and the calculation process of the lateral clearance value GAP of the edge cutting mechanism 4 is specifically as follows:

the process of calculating the edge overlap LAP of the edge slitting mechanism 4 is specifically as follows:

wherein h represents the thickness of the strip in millimeters; a. b, c and d represent calculation and experience coefficients, and are respectively selected by comprehensively judging parameters of the strip strength, the cutting length, the thickness and the burr length; l (L) ₁ And l ₂ The section structural parameters of the section are comprehensively determined by the length of the L1 stuffing pressing area, the length of the L2 cutting area and the length of the L3 tearing area.

And (3) adjusting parameters of the trimming mechanism 4 to the calculated lateral clearance value GAP of the trimming mechanism 4 and the shearing edge overlapping degree LAP of the trimming mechanism 4, and then performing trial trimming.

And further iteratively determining a lateral clearance value GAP of the new trimming mechanism 4 and a shearing edge overlapping degree LAP of the trimming mechanism 4 according to the result parameters of the trial trimming, adjusting the parameters of the trimming mechanism 4 to the lateral clearance value GAP of the new trimming mechanism 4 and the shearing edge overlapping degree LAP of the trimming mechanism 4, and circulating until the quality of the strip after trimming meets the requirements, and then starting the formal trimming.

The method can improve the trimming quality of the strip by controlling the equipment parameters of the trimming mechanism 4, further relieve the problems that the strip trimming low-strength metal strip is easy to generate edge burr defect and the high-strength metal strip is easy to generate edge crack, and is especially suitable for strip steel. Moreover, the problems that the low-strength metal strip is easy to generate edge burr defects and the high-strength metal strip is easy to generate edge cracks due to the fact that lateral displacement, lateral force, lateral clearance value and shearing edge overlapping degree are not matched with strip tissue characteristics can be limited through the method.

All articles and references, including patent applications and publications, disclosed herein are incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not substantially affect the essential novel features of the combination. The use of the terms "comprises" or "comprising" to describe combinations of elements, components, or steps herein also contemplates embodiments consisting essentially of such elements, components, or steps. By using the term "may" herein, it is intended that any attribute described as "may" be included is optional. Multiple elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, component, section or step is not intended to exclude other elements, components, sections or steps.

In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other. The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.

Claims (15)

1. A trimming device for a strip, the trimming device comprising:

the first tension roller and the second tension roller are arranged in parallel;

at least one trimming mechanism having a trimming member disposed between the first tension roller and the second tension roller; after the strip material passes through the upper side of the side wall of the first tension roller in a clinging manner, at least one side of the strip material is longitudinally sheared by the trimming piece and then is output after passing through the upper side of the side wall of the second tension roller in a clinging manner; the diameters of the middle parts of the side walls of the first tension roller are gradually reduced towards the two sides; the diameters of the middle parts of the side walls of the second tension roller are gradually reduced towards the two sides.

2. The trimming device for strips according to claim 1, wherein the central portion of the side wall of the first tension roller is gradually reduced in diameter to both sides so that the inclination of both ends of the side wall of the first tension roller is between 1 degree and 15 degrees; and/or the number of the groups of groups,

the middle part of the side wall of the second tension roller gradually reduces to two sides in diameter so that the inclination of the two ends of the side wall of the second tension roller is between 1 degree and 15 degrees.

3. The trimming device for strips according to claim 2, wherein the inclination of the two ends of the side walls of the first tension roller is equal to the inclination of the two ends of the side walls of the second tension roller.

4. A strip trimming device according to claim 3, wherein the trimming member is a trimming disc shear, the shearing direction of which is capable of a shearing angle of between-1 ° and 1 ° to the surface normal of the strip.

5. The strip trimming device according to claim 1, wherein the strip trimming device comprises:

the strip limiting mechanism at least comprises six pairs of pinch rolls, namely a first pair of pinch rolls, a second pair of pinch rolls, a third pair of pinch rolls, a fourth pair of pinch rolls, a fifth pair of pinch rolls and a sixth pair of pinch rolls; wherein, in the moving direction of the strip, the first pair of pinch rollers and the second pair of pinch rollers are positioned between the first tension roller and the trimming member, and respectively pinch the two ends of the strip;

in the moving direction of the strip, the third pair of pinch rolls and the fourth pair of pinch rolls are positioned between the second tension roll and the trimming piece and respectively clamp and send two ends of the trimmed strip;

in the moving direction of the strip, the fifth pair of pinch rollers and the sixth pair of pinch rollers are located between the first pair of pinch rollers, the second pair of pinch rollers and the third pair of pinch rollers, and the fourth pair of pinch rollers, in the width direction of the strip, when two trimming mechanisms with trimming members are provided, and when two trimming members respectively perform longitudinal shearing operations on both ends of the strip, the fifth pair of pinch rollers and the sixth pair of pinch rollers are located between the two trimming members, and the fifth pair of pinch rollers and the sixth pair of pinch rollers are located on the left half side and the right half side of the strip, respectively.

6. The strip trimming device according to claim 5, wherein the inclination of the axes of the six pairs of pinch rolls is equal to the inclination of the two ends of the side wall of the first tension roll.

7. The strip trimming apparatus of claim 5, wherein each pair of pinch rolls comprises: the belt material passes between the upper pressing roller and the lower carrier roller; the upper press roll mounting frame is provided with an upper press roll; the lower carrier roller mounting frame is provided with a lower carrier roller;

the tape stop mechanism further comprises: an upper press roll bracket; the upper hydraulic telescopic unit is connected between the upper press roll bracket and the upper press roll mounting frame and is used for adjusting the inclination of the upper press roll bracket through telescopic action; a lower carrier roller bracket; the lower hydraulic telescopic unit is connected between the lower carrier roller support and the lower carrier roller mounting frame and is telescopic to adjust the gradient of the lower carrier roller mounting frame.

8. The apparatus according to claim 7, wherein the inclination of the lower roller mounting frame is changed by the lower hydraulic telescoping unit or the inclination of the upper roller support is changed by the upper hydraulic telescoping unit, so that the pressure on the half side of the strip is changed, and the strip is guided and rectified.

9. The apparatus for trimming a strip of claim 7, wherein said strip stop mechanism further comprises:

and the angle detection device is used for detecting the inclination of the upper compression roller mounting frame and/or the lower carrier roller mounting frame.

10. The apparatus for trimming a strip of claim 1, wherein the apparatus for trimming a strip further comprises:

and a heating unit positioned upstream of the trimming member in the moving direction of the strip and used for carrying out zone heating on the strip in the width direction so that the temperature of the edge area of the strip is higher than that of the middle area of the strip.

11. The apparatus for trimming a strip according to claim 10, wherein the temperature of the edge region of the strip is 150 degrees or less higher than the temperature of the middle region of the strip, and the position where the strip is sheared by the trimming member is located in the edge region.

12. The strip trimming device according to claim 1, wherein, when the trimming means are disc trimming means, the lateral clearance GAP of the trimming means is set to the following values:

the setting value of the cutting edge overlapping degree LAP of the edge cutting mechanism is specifically as follows:

wherein h represents the thickness of the strip in millimeters; a. b, c and d represent calculation and experience coefficients, and are respectively selected by comprehensively judging parameters of the strip strength, the cutting length, the thickness and the burr length; l (L) ₁ And l ₂ The section structural parameters of the section are comprehensively determined by the length of the L1 stuffing pressing area, the length of the L2 cutting area and the length of the L3 tearing area.

13. The strip trimming device according to claim 12, wherein when the strip is a strip steel, l ₁ And l ₂ Referring to table 1 for specific values of (c),

table 1 calculation and empirical parameter/comparison Table

Length of L1 stuffing pressing zone/length of L2 cutting zone l ₁ 0～0.1 1.1 0.1-0.5 1 0.5～0.7 0.8 0.7～1 0.7 >1 0.5 Length of L2 cut/length of L3 tear I ₂ 0～1 0.5 1～2 1 2～5 1.1 >5 1.2

；

a. Specific values of b, c, d are referred to tables 2 to 5,

table 2 calculation and empirical parameter a comparison table

Table 3 calculation and empirical parameter b comparison Table

Table 4 comparison table of calculated and empirical parameters c

Thickness mm c ₁ 0.3-0.7 0 0.7-1.3 0.46 1.4-2.8 0.16 2.9-3.3 0 Cutting length km c ₂ 0-20 1 20-80 1.02 80-120 1.05

Table 5 calculation and empirical parameter d comparison Table

14. The strip trimming device according to claim 12, wherein after the set value of the lateral GAP value GAP of the trimming means and the set value of the blade overlap LAP of the trimming means are determined, trial trimming is performed, and further iteration is performed to determine a new set value of the lateral GAP value GAP of the trimming means and the set value of the blade overlap LAP of the trimming means according to the result parameters of the trial trimming, and then the equipment parameters of the trimming means are readjusted.

15. A method of controlling a trimming device for a strip, the method comprising:

acquiring parameter information of the strip, wherein the parameter information comprises steel grade, yield strength, tensile strength, thickness, cutting length, L1 stuffing pressing area length, L2 cutting area length, L3 tearing area length, L4 burr area length and cutting length of the strip;

and obtaining a lateral clearance value GAP of the trimming mechanism and a shearing edge overlapping degree LAP of the trimming mechanism according to the parameter information of the strip, wherein the calculation process of the lateral clearance value GAP of the trimming mechanism is specifically as follows:

the calculating process of the cutting edge overlapping degree LAP of the edge cutting mechanism specifically comprises the following steps:

wherein h represents the thickness of the strip in millimeters; a. b, c and d represent calculation and experience coefficients, and are respectively selected by comprehensively judging parameters of the strip strength, the cutting length, the thickness and the burr length; l (L) ₁ And l ₂ Representing the structural parameters of the section, and comprehensively determining the length of the L1 stuffing pressing area, the length of the L2 cutting area and the length of the L3 tearing area; in this step, when the strip is a strip steel, l ₁ And l ₂ Specific values of a, b, c, d refer to tables 2 to 5;

table 1 calculation and empirical parameter/comparison Table

Length of L1 stuffing pressing zone/length of L2 cutting zone I ₁ 0～0.1 1.1 0.1-0.5 1 0.5～0.7 0.8 0.7～1 0.7 >1 0.5 Length of L2 cut/length of L3 tear I ₂ 0～1 0.5 1～2 1 2～5 1.1 >5 1.2

Table 2 calculation and empirical parameter a comparison table

Mpa Strength of a ₁ <220 Low and low 0.1 220-300 In (a) 0.11 >300 High height 0.12 Thickness of strip steel is mm a ₂ 0.3-2.6 1 2.7-3.3 0 Cutting length km a ₃ 0-20 1 20-80 0.95 80-120 0.9

Table 3 calculation and empirical parameter b comparison Table

Table 4 comparison table of calculated and empirical parameters c

Thickness mm c ₁ 0.3-0.7 0 0.7-1.3 0.46 1.4-2.8 0.16 2.9-3.3 0 Cutting length km c ₂ 0-20 1 20-80 1.02 80-120 1.05

Table 5 calculation and empirical parameter d comparison Table

Thickness mm d ₁ 0.3-0.7 0.43 0.7-1.3 0.11 1.4-2.8 0.976 2.9-3.3 0.45 Cutting length km d ₂ 0-20 1 20-80 1.1 80-120 1.2 Length of burr area L4 um d ₃ 0-20 1 20-40 1.15 >40 1.25

Adjusting parameters of the trimming mechanism to the calculated lateral clearance value GAP of the trimming mechanism and the calculated shearing edge overlapping degree LAP of the trimming mechanism, and then performing trial trimming;

and further iteratively determining a new lateral clearance value GAP of the trimming mechanism and a new shear edge overlapping degree LAP of the trimming mechanism according to the result parameters of the trial trimming, adjusting the parameters of the trimming mechanism to the new lateral clearance value GAP of the trimming mechanism and the new shear edge overlapping degree LAP of the trimming mechanism, and circulating in such a way until the quality of the strip after trimming meets the requirements, and then starting the formal trimming.