CN113104628A - Method for splicing strip-shaped materials based on splicing equipment - Google Patents
Method for splicing strip-shaped materials based on splicing equipment Download PDFInfo
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- CN113104628A CN113104628A CN202110224790.1A CN202110224790A CN113104628A CN 113104628 A CN113104628 A CN 113104628A CN 202110224790 A CN202110224790 A CN 202110224790A CN 113104628 A CN113104628 A CN 113104628A
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- rolling die
- strip
- shaped material
- splicing
- new
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H19/00—Changing the web roll
- B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
- B65H19/18—Attaching, e.g. pasting, the replacement web to the expiring web
- B65H19/1805—Flying splicing, i.e. the expiring web moving during splicing contact
- B65H19/1826—Flying splicing, i.e. the expiring web moving during splicing contact taking place at a distance from the replacement roll
- B65H19/1836—Flying splicing, i.e. the expiring web moving during splicing contact taking place at a distance from the replacement roll the replacement web being accelerated or running prior to splicing contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
- B65H2701/19—Specific article or web
- B65H2701/1944—Wrapping or packing material
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Abstract
The invention provides a method for splicing strip materials based on splicing equipment. The splicing apparatus includes: the novel annular rolling device comprises an online unreeling shaft (1), an old strip material coil or cylinder (2) wound with an old strip material (3) and arranged on the online unreeling shaft, a standby unreeling shaft (8), a new strip material coil or cylinder (7) wound with a new strip material (6) and arranged on the standby unreeling shaft, a splicing device (4) formed by a first rolling die and a second rolling die, and an accelerating roller (5), wherein at least one of the first rolling die and the second rolling die is accelerated to be synchronous with the speed of the new strip material and the old strip material in a stroke range not larger than one circle, the first rolling die and the second rolling die are meshed at the same speed, the tension of the new strip material and the old strip material is larger than the maximum tension borne by the spliced strip material and smaller than the maximum tension borne by a normal strip material, and the first rolling die and the second rolling die are decelerated to stop, and the knurling and splicing of the new.
Description
Technical Field
The invention relates to a method for splicing strip-shaped materials based on splicing equipment, and belongs to the technical field of mechanical equipment design and manufacture.
Background
In packaging machines, the packaging material used is mostly in the form of strips of band-shaped material and is supplied substantially in the form of rolls or logs. When the supply of the strip-shaped material on the old roll or drum is about to be finished, the strip-shaped material on the new roll or drum needs to be automatically spliced (also called knurling) with the strip-shaped material on the old roll or drum in an on-line manner, so as to realize the continuous supply of the strip-shaped material. Chinese patent application No. 03154021.X discloses a "method and apparatus for joining strips of material" which, when splicing strips of material, requires contacting a knurled surface and an opposing surface, respectively provided on respective rotating rollers, at substantially the same speed (v) as the strips of material, and passing new and old strips to be spliced between the knurled surface and the opposing surface to complete the splicing (i.e. knurling). Firstly, the knurled surface needs to be accelerated to the knurling speed (v) after moving backwards in the direction opposite to the moving direction during knurling during splicing, and the knurled surface inevitably brings certain negative influence on positioning accuracy due to transmission space difference; secondly, because the relation between the moving speed, the moving acceleration and/or the position of the knurled surface and the time is a curve basically expressed by a sine function, namely the moving speed of the knurled surface is changed in the knurling process, the phenomena of twisting, sliding or pushing inevitably occur between the knurled surface and the opposite surface and between the knurled surface and the new and old material strips, so that the new and old material strips are dislocated and wrinkled, the splicing quality of the strip-shaped material is greatly reduced, even the splicing success rate is influenced, and the stability of the equipment is influenced.
There is therefore a need for improvements in the prior art.
Disclosure of Invention
The invention aims to provide a method for splicing strip materials based on splicing equipment, which has the advantages of good splicing quality, high splicing success rate and stable equipment operation.
The invention is completed by the following technical scheme: a method of splicing strip materials based on a splicing apparatus, the splicing apparatus comprising: -an on-line unwinding shaft (1) and on it an old reel or drum (2) of web material wound with old web material (3), -a standby unwinding shaft (8) and on it a new reel or drum (7) of web material wound with new web material (6), -a splicing device (4) and-an acceleration roller (5), wherein: the splicing device (4) comprises a first transmission shaft (42) and a first rolling die (41) arranged on the first transmission shaft, a second transmission shaft (43) and a second rolling die (44) arranged on the second transmission shaft; the method is characterized by comprising the following steps of:
firstly, feeding the pulled-out old strip-shaped material (3) to downstream production equipment after passing through a splicing device (4), and connecting the pulled-out new strip-shaped material (6) to an accelerating roller (5) after passing through the splicing device (4);
step two, when the old strip-shaped material (3) is about to be used up, the acceleration roller (5) and the standby unreeling shaft (8) are used for accelerating together, and the speed of the new strip-shaped material (6) and the new strip-shaped material roll or drum (7) is controlled to be synchronous with the speed of the old strip-shaped material (3);
step three, starting the splicing device (4) to accelerate the first rolling die (41) and the second rolling die (44), and accelerating the first rolling die (41) and the second rolling die (44) to the synchronous speed of the new strip-shaped material and the old strip-shaped material (6, 3) before the first rolling die and the second rolling die (41, 44) are meshed, and maintaining the synchronous speed;
step four, before the first rolling die and the second rolling die (41 and 44) are meshed, controlling the pulling force of the new strip-shaped material (6) to be larger than the maximum pulling force which can be borne by the spliced strip-shaped material and smaller than the maximum pulling force which can be borne by the normal strip-shaped material, so that when the first rolling die and the second rolling die (41 and 44) are just meshed, the front end (61) of the new strip-shaped material (6) before the meshing point is stably removed, and then the new strip-shaped material (6) runs under the normal pulling force;
step five, rolling and splicing the new and old belt-shaped materials (6 and 3) while the first and second rolling dies (41 and 44) are engaged;
step six, controlling the tension of the old strip-shaped material (3) to be greater than the maximum tension which can be borne by the spliced strip-shaped material and less than the maximum tension which can be borne by the normal strip-shaped material in the process from the beginning to the end of meshing by the first rolling die (41) and the second rolling die (44), and stably removing the rear end (31) of the old strip-shaped material (3) behind the meshing point when the first rolling die (41) and the second rolling die (44) are engaged;
and seventhly, after the first rolling die (41) and the second rolling die (44) are meshed or meshed, decelerating the first rolling die (41) and the second rolling die (44) until the first rolling die and the second rolling die stop, and enabling the spliced new strip-shaped material (6) to run at normal speed and normal tension to complete the supply of the new strip-shaped material (6).
At least one of the first and second rolling dies (41 or 44) completes the whole process of acceleration, speed synchronization and deceleration to stop within a travel range not larger than one circle so as to carry out knurling and splicing on the new and old strip-shaped materials (6 and 3).
In the third step, at least one rolling die (41 or 44) is positioned farthest away from the engagement point before the first and second rolling dies (41, 44) start accelerating.
In the seventh step, after the first rolling die and the second rolling die (41 and 44) are decelerated to stop, the stop position of at least one rolling die (41 or 44) does not exceed the position before starting acceleration in the rolling movement direction.
Compared with the prior art, the invention has the following advantages and effects: firstly, the first rolling die or the second rolling die does not have reverse rotation action, so that the negative influence on the positioning accuracy of the first rolling die and the second rolling die caused by transmission space difference is completely eliminated; secondly, in the fifth step, when the first rolling die and the second rolling die are meshed, and the new strip-shaped material and the old strip-shaped material are rolled and spliced, the first rolling die and the second rolling die have the same movement speed with the new strip-shaped material and the old strip-shaped material, so that the problem that the new strip-shaped material and the old strip-shaped material are not twisted, slid or pushed when the first rolling die and the second rolling die contact the new strip-shaped material and the old strip-shaped material can be fundamentally solved, and the splicing of the new strip-shaped material and the old strip-shaped material can be accurately finished; meanwhile, the tension of the front end of the new strip-shaped material and the tension of the rear end of the old strip-shaped material are controlled, so that the front end of the new strip-shaped material and the rear end of the old strip-shaped material are removed when the first rolling die and the second rolling die are just meshed, the splicing success rate and the splicing quality are ensured, and the stable operation of equipment is guaranteed.
Drawings
FIG. 1 is a schematic structural diagram of a splicing apparatus according to the present invention;
FIG. 2 is a schematic position diagram of two rolling dies rotating for one circle from an initial position I, a starting meshing position II, an ending meshing position III to a stopping position IV;
FIG. 3 is a schematic position diagram of two rolling dies in another structure rotating for one circle from an initial position I, a starting engagement position II, an ending engagement position III to a stop position IV;
FIG. 4 is a graph of acceleration a (deceleration a 1), velocity v, and position s for at least 1 rolling die;
fig. 5 is a graph comparing the effect of the present invention and the prior art.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the method for splicing a strip-shaped material based on splicing equipment provided by the invention comprises the following steps: -an on-line unwinding shaft (1) and on it an old reel or drum (2) of web material wound with old web material (3), -a standby unwinding shaft (8) and on it a new reel or drum (7) of web material wound with new web material (6), -a splicing device (4) and-an acceleration roller (5), wherein: the splicing device (4) comprises a first transmission shaft (42) and a first rolling die (41) arranged on the first transmission shaft, a second transmission shaft (43) and a second rolling die (44) arranged on the second transmission shaft; splicing is performed by the following steps:
firstly, feeding the pulled-out old strip-shaped material (3) to downstream production equipment after passing through a splicing device (4), and connecting the pulled-out new strip-shaped material (6) to an accelerating roller (5) after passing through the splicing device (4);
step two, when the old strip-shaped material (3) is about to be used up, the acceleration roller (5) and the standby unreeling shaft (8) are used for accelerating together, and the speed of the new strip-shaped material (6) and the new strip-shaped material roll or drum (7) is controlled to be synchronous with the speed of the old strip-shaped material (3);
step three, starting the splicing device (4) to accelerate the first rolling die (41) and the second rolling die (44), and accelerating the first rolling die (41) and the second rolling die (44) to the synchronous speed of the new strip-shaped material and the old strip-shaped material (6, 3) before the first rolling die and the second rolling die (41, 44) are meshed, and maintaining the synchronous speed;
before the first rolling die and the second rolling die (41 and 44) are meshed, controlling the tensile force of the new strip-shaped material (6) to be greater than the maximum tensile force which can be borne by the strip-shaped material after splicing (knurling) and less than the maximum tensile force which can be borne by the normal strip-shaped material, stably removing the front end (61) of the new strip-shaped material (6) before the meshing point when the first rolling die and the second rolling die (41 and 44) are just meshed, and then enabling the new strip-shaped material (6) to run under the normal tensile force;
step five, rolling and splicing the new and old belt-shaped materials (6 and 3) while the first and second rolling dies (41 and 44) are engaged;
step six, controlling the tension of the old strip-shaped material (3) to be greater than the maximum tension which can be borne by the strip-shaped material after splicing (knurling) and less than the maximum tension which can be borne by the normal strip-shaped material in the process from the beginning to the end of meshing by the first rolling die (41) and the second rolling die (44), and stably removing the rear end (31) of the old strip-shaped material (3) behind the meshing point when the first rolling die (41) and the second rolling die (44) are engaged;
and seventhly, after the first rolling die (41) and the second rolling die (44) are meshed or meshed, decelerating the first rolling die (41) and the second rolling die (44) until the first rolling die and the second rolling die stop, and enabling the spliced new strip-shaped material (6) to run at normal speed and normal tension to complete the supply of the new strip-shaped material (6).
After the first rolling die and the second rolling die (41 and 44) are decelerated to stop, the stop positions of the two rolling dies (41 and 44) do not exceed the position before starting acceleration in the rolling movement direction, such as a position IV in figure 2;
the first rolling die and the second rolling die (41, 44) complete the whole process of acceleration (I-II), speed synchronization (II-III) and deceleration to stop (III-IV) within a stroke range not larger than one circle, such as positions I, II, III and IV in figure 2, so as to carry out knurling and splicing on the new and old belt-shaped materials (6, 3).
In order to ensure that the running speeds of the first rolling die and the second rolling die (41, 44) from the meshing position II to the meshing position III are basically synchronous with the speeds, the first rolling die and the second rolling die (41, 44) are controlled by driving a servo motor to perform acceleration starting according to the acceleration shown in a in figure 4, so that the first rolling die and the second rolling die (41, 44) can be accelerated to the speeds in a relatively short stroke, the overshoot phenomenon does not occur in the system, or the overshoot phenomenon occurs in a controllable range, the first rolling die and the second rolling die (41, 44) are favorably ensured to maintain the running speeds to the meshing end, and then the synchronous splicing of the new strip-shaped material and the old strip-shaped material (6, 3) is realized, and the splicing power is improved.
After the first rolling die and the second rolling die (41 and 44) are engaged, the servo motor is driven to control the first rolling die and the second rolling die (41 and 44) to decelerate and stop according to the deceleration shown by a1 in fig. 4, so that the first rolling die and the second rolling die (41 and 44) complete the whole process of acceleration, speed synchronization and deceleration to stop within the stroke range not larger than one circle, so as to carry out knurling and splicing on the new strip-shaped material and the old strip-shaped material (6 and 3), thereby completely eliminating the phenomenon that the first rolling die and the second rolling die (41 and 44) contact the new strip-shaped material and the old strip-shaped material (6 and 3) for many times which are inevitable because the first rolling die and the second rolling die (41 and 44) accelerate to the speed for many times, and simultaneously basically synchronizing the running speed in the process that the first rolling die and the second rolling die (41 and 44) start to engage with each other because of the first rolling die and the second rolling die (41 and the second, 44) The relative sliding during the meshing splicing (knurling) effectively improves the splicing success rate and the equipment running stability.
In order to obtain reasonable acceleration and deceleration strokes and reduce the contact frequency of the first rolling die and the second rolling die (41 and 44) with new and old strip-shaped materials (6 and 3) as much as possible in the splicing process, and simultaneously avoid the negative influence of the transmission space difference which must be overcome due to the rotation of the first rolling die and the second rolling die (41 and 44) on the positioning precision of the first rolling die and the second rolling die (41 and 44), the position which is farthest away from the meshing point is preferably used as an initial position I of the first rolling die and the second rolling die (41 and 44) before starting, and simultaneously the stop position IV of the first rolling die and the second rolling die (41 and 44) does not exceed the position I before starting and accelerating in the rolling motion direction so as to facilitate the next rolling splicing.
In the prior art, the maximum tensile force which can be borne by the strip-shaped material after the strip-shaped material is meshed (knurled) through the first rolling die (41) and the second rolling die (44) is about 75 percent of the maximum tensile force which can be borne by the normal strip-shaped material, so that the tensile force for removing the front end (61) of the new strip-shaped material (6) in the fourth step and the tensile force for removing the rear end (31) of the old strip-shaped material (3) in the sixth step are 80-95 percent of the maximum tensile force which can be borne by the normal strip-shaped material, and therefore the phenomenon that the removal of the front end (61) of the new strip-shaped material (6) and the rear end (31) of the old strip-shaped material (3) is unstable due to the mass fluctuation of the.
The implementation effect of the present invention is compared with the effect of the prior art, as shown in fig. 5, wherein: the abscissa is the splicing test speed, and the unit is m/min; the ordinate is the effective working rate eta, and the calculation formula is as follows:
wherein: η — effective work rate (%);
Tgeneral assembly-total test time;
Ttherefore, it isDown time due to splice failure;
Tis notDown time due to non-splice failure.
The broken line in fig. 5 represents the effective operation rate η of the prior art, and the solid line represents the effective operation rate η of the present invention, as can be seen from the graph: the effective operation rate η of the present invention is in a steady state, while the effective operation rate η of the prior art is in a significantly decreasing state with the increase of the splicing speed, and it can be known from the test result shown in fig. 5 that the present invention has a higher and significant effective operation rate η compared with the prior art.
The above description is only exemplary of the present invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should fall within the protection scope of the present invention.
Claims (4)
1. A method of splicing strip materials based on a splicing apparatus, the splicing apparatus comprising: -an on-line unwinding shaft (1) and on it an old reel or drum (2) of web material wound with old web material (3), -a standby unwinding shaft (8) and on it a new reel or drum (7) of web material wound with new web material (6), -a splicing device (4) and-an acceleration roller (5), wherein: the splicing device (4) comprises a first transmission shaft (42) and a first rolling die (41) arranged on the first transmission shaft, a second transmission shaft (43) and a second rolling die (44) arranged on the second transmission shaft; the method is characterized in that: splicing is performed by the following steps:
firstly, feeding the pulled-out old strip-shaped material (3) to downstream production equipment after passing through a splicing device (4), and connecting the pulled-out new strip-shaped material (6) to an accelerating roller (5) after passing through the splicing device (4);
step two, when the old strip-shaped material (3) is about to be used up, the acceleration roller (5) and the standby unreeling shaft (8) are used for accelerating together, and the speed of the new strip-shaped material (6) and the new strip-shaped material roll or drum (7) is controlled to be synchronous with the speed of the old strip-shaped material (3);
step three, starting the splicing device (4) to accelerate the first rolling die (41) and the second rolling die (44), and accelerating the first rolling die (41) and the second rolling die (44) to the synchronous speed of the new strip-shaped material and the old strip-shaped material (6, 3) before the first rolling die and the second rolling die (41, 44) are meshed, and maintaining the synchronous speed;
step four, before the first rolling die and the second rolling die (41 and 44) are meshed, controlling the pulling force of the new strip-shaped material (6) to be larger than the maximum pulling force which can be borne by the spliced strip-shaped material and smaller than the maximum pulling force which can be borne by the normal strip-shaped material, so that when the first rolling die and the second rolling die (41 and 44) are just meshed, the front end (61) of the new strip-shaped material (6) before the meshing point is stably removed, and then the new strip-shaped material (6) runs under the normal pulling force;
step five, rolling and splicing the new and old belt-shaped materials (6 and 3) while the first and second rolling dies (41 and 44) are engaged;
step six, controlling the tension of the old strip-shaped material (3) to be greater than the maximum tension which can be borne by the spliced strip-shaped material and less than the maximum tension which can be borne by the normal strip-shaped material in the process from the beginning to the end of meshing by the first rolling die (41) and the second rolling die (44), and stably removing the rear end (31) of the old strip-shaped material (3) behind the meshing point when the first rolling die (41) and the second rolling die (44) are engaged;
and seventhly, after the first rolling die (41) and the second rolling die (44) are meshed or meshed, decelerating the first rolling die (41) and the second rolling die (44) until the first rolling die and the second rolling die stop, and enabling the spliced new strip-shaped material (6) to run at normal speed and normal tension to complete the supply of the new strip-shaped material (6).
2. The method of claim 1, wherein: at least one of the first and second rolling dies (41 or 44) completes the whole process of acceleration, speed synchronization and deceleration to stop within a travel range not larger than one circle so as to carry out knurling and splicing on the new and old strip-shaped materials (6 and 3).
3. The method of claim 1, wherein: in the third step, at least one rolling die (41 or 44) is positioned farthest away from the engagement point before the first and second rolling dies (41, 44) start accelerating.
4. The method of claim 1, wherein: in the seventh step, after the first rolling die and the second rolling die (41 and 44) are decelerated to stop, the stop position of at least one rolling die (41 or 44) does not exceed the position before starting acceleration in the rolling movement direction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110224790.1A CN113104628B (en) | 2021-03-01 | 2021-03-01 | Method for splicing strip-shaped materials based on splicing equipment |
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|---|---|---|---|
| CN202110224790.1A CN113104628B (en) | 2021-03-01 | 2021-03-01 | Method for splicing strip-shaped materials based on splicing equipment |
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| CN113104628A true CN113104628A (en) | 2021-07-13 |
| CN113104628B CN113104628B (en) | 2023-06-09 |
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