CN111992792B - Method for controlling gap and overlapping amount of longitudinal cutting blade of variable-thickness plate - Google Patents
Method for controlling gap and overlapping amount of longitudinal cutting blade of variable-thickness plate Download PDFInfo
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- CN111992792B CN111992792B CN202010861604.0A CN202010861604A CN111992792B CN 111992792 B CN111992792 B CN 111992792B CN 202010861604 A CN202010861604 A CN 202010861604A CN 111992792 B CN111992792 B CN 111992792B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D19/00—Shearing machines or shearing devices cutting by rotary discs
- B23D19/04—Shearing machines or shearing devices cutting by rotary discs having rotary shearing discs arranged in co-operating pairs
- B23D19/06—Shearing machines or shearing devices cutting by rotary discs having rotary shearing discs arranged in co-operating pairs with several spaced pairs of shearing discs working simultaneously, e.g. for trimming or making strips
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D33/00—Accessories for shearing machines or shearing devices
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Abstract
The invention discloses a method for controlling the gap and the overlapping amount of longitudinal cutting blades of a variable-thickness plate, which comprises the following steps of: calculating a blade clearance set value L according to the thickness of the variable-thickness plate from the 1 st section to the n th section 0 And the blade coincidence value set value H 0 ：L 0 ＝(T 1 +T 2 +……+T n )/n×10％×1.2；H 0 ＝T min X 1/3; in the formula, T 1 、T 2 、……、T n The thickness of the variable thickness plate from the 1 st section to the n th section; n is the total number of paragraphs; t is a unit of min Is T 1 、T 2 、……、T n The smallest thickness of (d); according to the blade clearance setting value L 0 Assembling the longitudinal cutting blade by changing the width W of the thick plate; according to the blade coincidence value set value H 0 The blade press down weight of the slitting blade is controlled. The method for controlling the gap and the overlapping amount of the longitudinal cutting blade of the variable-thickness plate can ensure that the variable-thickness plate is sheared orderly, reduce the occurrence rate of burrs and improve the shearing quality of the variable-thickness plate.
Description
Technical Field
The invention relates to a variable thickness plate longitudinal cutting technology, in particular to a method for controlling the gap and the overlapping amount of longitudinal cutting blades of a variable thickness plate.
Background
The variable thickness plate is a metal plate or plate coil with the thickness changing regularly in the longitudinal direction during steel rolling, and is an effective means for solving the problem of light weight materials for automobiles; at present, the blank processing of the variable thickness plate part is generally realized by cutting or blanking a variable thickness plate coil; for the variable-thickness plate part blank with narrower width, in order to reduce the cost in the processing process, the variable-thickness plate coil is generally rolled by adopting a multiple length, and then the variable-thickness plate with narrow width is obtained by a longitudinal cutting and transverse cutting mode; after the variable thickness plate is longitudinally cut, the edges of a partial thin area or a thick area are not uniform or more burrs and other defects are generated, so that the quality of the variable thickness plate is seriously influenced; research shows that the shearing quality of the variable-thickness plate is closely related to the gap and the coincidence quantity of the longitudinal cutting blade; however, the conventional method for controlling the blade gap and the overlapping amount of the medium-thickness plate is not suitable for the longitudinal cutting of the variable-thickness plate.
In view of the above situation, it is urgent to develop a method for longitudinally cutting a variable thickness plate, which can ensure that the variable thickness plate is cut neatly, reduce the occurrence rate of burrs of the variable thickness plate, and effectively improve the cutting quality of the variable thickness plate.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for controlling the gap and the overlapping amount of the longitudinal cutting blade of the variable-thickness plate, which controls the gap and the overlapping amount of the longitudinal cutting blade according to the thickness of each section and the minimum thickness of the variable-thickness plate, so that the variable-thickness plate is sheared orderly, the occurrence rate of burrs of the variable-thickness plate is reduced, the shearing quality of the variable-thickness plate is effectively improved, and the production cost of the variable-thickness plate is further reduced.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for controlling the gap and the overlapping amount of longitudinal cutting blades of a variable-thickness plate comprises the following steps:
s1, calculating a blade clearance set value L according to the thickness of the variable-thickness plate from the 1 st section to the n th section 0 And the blade coincidence value set value H 0 ：
L 0 ＝(T 1 +T 2 +……+T n )/n×10％×1.2
H 0 ＝T min ×1/3
In the formula, T 1 、T 2 、……、T n The thickness of the variable thickness plate from the 1 st section to the n th section is in mm; n is the total number of paragraphs; t is a unit of min Is T 1 、T 2 、……、T n The smallest thickness in mm;
s2, setting a value L according to the blade clearance 0 Assembling the longitudinal cutting blade by the width W of the variable thickness plate;
s3, setting the value H according to the blade overlapping amount 0 The blade press down weight of the slitting blade is controlled.
Preferably, in the step S2, after the longitudinal cutting blade is assembled, the feeler gauge is used to measure the actual value L of the blade gap 1 When L is present 0 -0.005mm≤L 1 ≤L 0 If +0.005mm, the procedure goes to step S3, otherwise, the blade needs to be reassembled.
Preferably, in step S3, the blade depression overlap amount is controlled by a positive overlap amount.
The invention has the beneficial effects that:
according to the method for controlling the gap and the coincidence amount of the longitudinal cutting blade of the variable-thickness plate, the gap and the coincidence amount of the longitudinal cutting blade are controlled according to the thickness of each section and the minimum thickness of the variable-thickness plate, so that the variable-thickness plate is tidy after longitudinal cutting, the incidence rate of burrs of the variable-thickness plate is reduced, the shearing quality of the variable-thickness plate is effectively improved, and the production cost of the variable-thickness plate is further reduced.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a control flow chart of the method for controlling the gap and the overlapping amount of the longitudinal cutting blade of the variable thickness plate according to the present invention;
FIG. 2 is a schematic view of the blade clearance and blade overlap in the present invention;
FIG. 3 is a control diagram of the amount of overlap of blade depression for a variable thickness plate according to the present invention;
FIG. 4 is a schematic view of a variable thickness plate according to embodiment 1 in the method for controlling the gap and the overlapping amount of the slitting blade of the variable thickness plate of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way.
As shown in FIG. 1, the method for controlling the gap and the overlapping amount of the longitudinal cutting blade of the variable-thickness plate comprises the following steps:
s1, calculating a blade clearance set value L according to the thickness of the variable-thickness plate from the 1 st section to the n th section 0 And the blade coincidence value set value H 0 ：
L 0 ＝(T 1 +T 2 +……+T n )/n×10％×1.2
H 0 ＝T min ×1/3
In the formula, T 1 、T 2 、……、T n The thickness of the variable thickness plate from the 1 st section to the n th section is in mm; n is the total number of paragraphs; t is min Is T 1 、T 2 、……、T n The smallest thickness in mm;
s2, setting a value L according to the blade clearance 0 Assembling the longitudinal cutting blade by the width W of the variable thickness plate;
after the longitudinal cutting blade is assembled, a clearance gauge is adopted to measure the actual clearance value L of the blade 1 (see FIG. 2), when L is 0 -0.005mm≤L 1 ≤L 0 If +0.005mm, the procedure goes to step S3, otherwise, the insert not meeting the set value is reassembled.
S3, according to the blade coincidence quantity set value H 0 Controlling the blade pressing weight of the longitudinal cutting blade;
the blade pressing weight of the longitudinal cutting blade is controlled by positive weight H 1 = blade overlap setting value H 0 (see fig. 2, 3), i.e. the amount of vertical clearance between the cutting edges of the upper blade 1 and the lower blade 2.
After the blade clearance and the blade coincidence quantity are adjusted, the variable-thickness plate 3 can be sheared, the sheared narrow-width variable-thickness plate has good shearing quality, the boundary of the cut surface and the fracture surface is continuous and straight, and the whole shearing surface is flat and smooth and has no notch and large burr.
Example 1
As shown in fig. 1-4, each segment is a variable thickness plate with a thickness of 1.2-1.6-1.2 and a width of 360mm (see fig. 4);
s1, calculating a blade clearance set value L according to the thickness of the variable-thickness plate from the 1 st section to the 3 rd section 0 ＝(1.2+1.6+1.2)/3×10％×1.2＝0.16mm；
Calculating a blade weight set value H according to the thickness of the section 1 falling to the section n of the variable thickness plate 0 ＝1.2×1/3＝0.4mm；
S2, setting a value L according to the blade clearance 0 Assembling the longitudinal cutting blade by the width W of the variable thickness plate;
after the longitudinal cutting blade is assembled, a clearance gauge is adopted to measure the actual clearance value L of the blade 1 ＝0.16mm，L 1 At L 0 In the range of +/-0.005 mm;
s3, according to the blade coincidence quantity set value H 0 For positive registration control of the blade-down registration of slitting blades, i.e. by pressing or lifting the upper blade1, such that the positive coincidence amount H 1 = blade overlap setting value H 0 ；
After the blade gap and the blade weight are adjusted, the variable thick plate 3 can be cut, the cut narrow-width variable thick plate has good cutting quality, the cut surface and the fracture surface boundary are continuous and straight, and the whole cut surface is flat and smooth and has no notch or large burr.
Example 2
As shown in fig. 1-3, each segment is a variable thickness plate with a thickness of 1.5-1.8-1.2 and a width of 360 mm;
s1, calculating a blade clearance set value L according to the thickness of the variable-thickness plate from the 1 st section to the 3 rd section 0 ＝(1.5+1.8+1.2)/3×10％×1.2＝0.18mm；
Calculating a blade weight set value H according to the thickness of the variable thickness plate from the 1 st section to the n th section 0 ＝1.2×1/3＝0.4mm；
S2, setting a value L according to the blade clearance 0 Assembling the longitudinal cutting blade by changing the width W of the thick plate;
after the longitudinal cutting blade is assembled, a clearance gauge is adopted to measure the actual clearance value L of the blade 1 ＝0.181mm，L 1 At L 0 In the range of +/-0.005 mm;
s3, setting the value H according to the blade overlapping amount 0 Positive overlap control of the blade pressing overlap of the slitting blade, i.e. by pressing or lifting the axis of the upper blade 1, so that the positive overlap H 1 = blade overlap set value H 0 ；
After the blade clearance and the blade coincidence quantity are adjusted, the variable-thickness plate 3 can be sheared, the sheared narrow-width variable-thickness plate has good shearing quality, the boundary of the cut surface and the fracture surface is continuous and straight, and the whole shearing surface is flat and smooth and has no notch and large burr.
Example 3
As shown in fig. 1-3, each segment is a variable thick plate with a thickness of 1.5-1.9-1.6 and a width of 360 mm;
s1, calculating a blade clearance set value L according to the thickness of the variable-thickness plate falling from the 1 st section to the 3 rd section 0 ＝(1.5+1.9+1.6)/3×10％×1.2＝0.20mm；
Calculating a blade weight set value H according to the thickness of the variable thickness plate from the 1 st section to the n th section 0 ＝1.5×1/3＝0.5mm；
S2, setting a value L according to the blade clearance 0 Assembling the longitudinal cutting blade by changing the width W of the thick plate;
after the longitudinal cutting blade is assembled, a clearance gauge is adopted to measure the actual clearance value L of the blade 1 ＝0.202mm，L 1 At L 0 In the range of +/-0.005 mm;
s3, setting the value H according to the blade overlapping amount 0 Positive overlap control of the blade depression overlap of the slitting blades, i.e. by depressing or raising the axis of the upper blade 1, so that positive overlap H 1 = blade overlap set value H 0 ；
After the blade clearance and the blade coincidence quantity are adjusted, the variable-thickness plate 3 can be sheared, the sheared narrow-width variable-thickness plate has good shearing quality, the boundary of the cut surface and the fracture surface is continuous and straight, and the whole shearing surface is flat and smooth and has no notch and large burr.
According to the method for controlling the gap and the overlapping amount of the longitudinal cutting blade of the variable-thickness plate, the gap and the overlapping amount of the longitudinal cutting blade are controlled according to the thicknesses of all sections of the variable-thickness plate and the minimum thickness, so that the variable-thickness plate is sheared orderly, the occurrence rate of burrs of the variable-thickness plate is reduced, the shearing quality of the variable-thickness plate is effectively improved, and the production cost of the variable-thickness plate is reduced.
Although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (3)
1. A method for controlling the gap and the overlapping amount of longitudinal cutting blades of a variable-thickness plate is characterized by comprising the following steps of:
s1, calculating a blade clearance set value L according to the thickness of the variable-thickness plate from the 1 st section to the n th section 0 And blade overlap setting value H 0 ：
L 0 ＝(T 1 +T 2 +……+T n )/n×10％×1.2
H 0 ＝T min ×1/3
In the formula, T 1 、T 2 、……、T n The thickness of the variable thickness plate from the 1 st section to the n th section is in mm; n is the total number of paragraphs; t is min Is T 1 、T 2 、……、T n The smallest thickness in mm;
s2, setting a value L according to the blade clearance 0 Assembling the longitudinal cutting blade by the width W of the variable thickness plate;
s3, setting the value H according to the blade overlapping amount 0 The blade press down weight of the slitting blade is controlled.
2. The control method according to claim 1, wherein in the step S2, after the longitudinal cutting blade is assembled, the actual value L of the blade clearance is measured by using a feeler gauge 1 When L is present 0 -0.005mm≤L 1 ≤L 0 If +0.005mm, the procedure goes to step S3, otherwise, the blade needs to be reassembled.
3. The control method according to claim 1, wherein in the step S3, the blade depression overlap amount is controlled with a positive overlap amount.
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