JP3964741B2 - NC lathe measurement and printing cylinder processing method for printing of used straight plate type gravure printing rolls - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, when a roll is attached to an NC lathe and data about rough values of the roll, nickel plating thickness, cell depth, cutting allowance, etc. are input, precise roll measurement is performed. When necessary calculations are performed and there is a prospect that the cylindrical plate processing will be performed appropriately so that the eccentric amount is not too large and the roll base material is not exposed, the end face processing and the cylindrical printing plate processing are automatically executed after measurement. However, when there is no prospect that the plate cylinder processing will be performed properly, the processing is not automatically executed. If the eccentric amount is too large or the plate cylinder processing is performed, the roll base material is exposed. Therefore, it is not necessary to make an artificial decision on whether or not to enter the cylinder printing process from the measured values, and human error is made in the judgment. It can be excluded Jill room, about measurement and 落版 cylindrical working method using NC lathe for 落版 the used straight plate type gravure printing roll.
[0002]
[Prior art]
In recent years, from the viewpoint of preventing deterioration of the global environment, the use of oil-based inks has been restricted and water-based inks are being used, and the direction of shallower gravure printing roll cells has been shown. In the plate making process of the recycle plate making of gravure printing roll, the shaving depth to drop the plate is small, and the thickness to be re-plated is also small, so the plate is removed from the viewpoint of time saving and energy saving. Technology enhancement is important.
[0003]
In the recycle plate-making of the used direct plate type gravure printing roll, the plate-release process is performed first. The entire process of the etching method is as follows: dechroming treatment-depressing plate polishing-degreasing-copper sulfate plating-cylindrical polishing-photosensitive film coating-laser exposure / latent image formation-development-etching-resist stripping-chromium plating is there. In addition, the entire engraving process includes the steps of dechroming treatment-printing plate polishing-degreasing-copper sulfate plating-cylindrical polishing-engraving-chrome plating.
[0004]
Conventionally, the above-described inversion plate is obtained by immersing a used gravure printing roll in a hydrochloric acid solution to dissolve and remove the chromium plating, and then pressing a rough finish polishing grindstone on the plate-making roll at a constant pressure to polish about 40 to 50 μm. As a substitute, cylindrical polishing was performed to scrape the cell.
[0005]
As described above, in the plate-making process in the recycling plate making of the direct plate type gravure printing roll, end-face polishing and printing plate polishing are performed after dechroming the used gravure printing roll. In the case where there is a pattern, the polishing is performed on the screen wire where there is a pattern, so the polishing area is small, so the polishing pressure per unit area increases, and the polishing proceeds deeply. Since the area is large, the polishing pressure per unit area is reduced and the polishing proceeds shallowly.
[0006]
For this reason, it is inevitable that it will be polished to some extent. When the roll is used repeatedly 4 to 5 times, it becomes more and more distorted at a plurality of different places in the length direction and the circumferential direction of the roll, so that the allowable cylindricity greatly deviates entirely. The reason why the roll becomes distorted in the plate-falling process is that there are a portion where the polishing grindstone is pressed at a constant pressure and where the polishing easily proceeds on the roll surface and a portion where the progress is slow.
[0007]
The plate making roll whose degree of sag increases and deviates from the allowable cylindricity is turned to the overhaul roundness and precisely rounded by the NC lathe. The thickness of the copper sulfate plating before processing is 100 μm to 150 μm. However, since the machining allowance is large in the overhaul cylindrical processing (round processing), when the circular processing is performed, the entire roll base material is exposed.
Accordingly, in the plate making process of the overhauled rounded iron roll, nickel plating is applied by 2 to 3 μm after degreasing treatment, and then copper sulfate plating is applied. The plate making process of the overhauled aluminum roll is pre-plated by the zincate method or anodal method, and then copper sulfate plating is applied. The overhauled round iron roll and aluminum roll have the roll base material cut to reduce the diameter of the roll base material, so thicken the copper sulfate plating to make it thicker by the smaller amount. The roll diameter when the copper sulfate plating is applied is set to the roll diameter when the roll is made.
[0008]
As mentioned above, grinding plates are polished in the plate making process of the recycle plate making of the conventional straight plate type gravure printing roll, and round processing by the NC lathe is adopted for overhaul processing. It is not included in the plate process.
[0009]
Japanese Patent Application Laid-Open No. 11-267915 describes an eccentric cylinder printing method in which an eccentric cylindrical portion is processed regardless of the eccentric amount or the eccentric cylindrical diameter, regardless of the eccentric amount or the eccentric cylindrical diameter. In order to machine the surface of the outer diameter evenly, in a machine tool where the workpiece holding mechanism and the current holding mechanism can move relative to each other, a rotating tool is provided in the direction perpendicular to the rotation axis of the workpiece holding mechanism, and the workpiece is rotated. It is provided that an eccentric cylinder is machined by controlling the bifurcating speed of the tool cutting edge position with respect to the workpiece rotation angle in a plane perpendicular to the rotation axis of the workpiece holding mechanism.
[0010]
Therefore, if the eccentric cylinder printing method disclosed in Japanese Patent Laid-Open No. 11-267915 is applied to the plate making process of recycled plate making, it remains eccentric even after the cylinder printing process. In addition to this, it has an adverse effect on image printing and printing of laser plate making, so it cannot be used as an appropriate roll. It is uneconomical to process a defective roll into a cylinder.
Rather, the roll cylinder is processed so that the outer cylindrical surface of the roll is not a concentric circle with respect to the rotation center of the roll and is eccentric so that it becomes a perfect circle. About rolls that measure the eccentricity by performing point measurement, and as a result, rolls that cause unevenness in rolls when exposed cylinder processing is performed, and rolls that cause the dynamic balance to deteriorate beyond a certain level or roll base materials are exposed It is more economical not to perform the plate cylinder processing. For rolls that do not perform the plate cylinder processing, is the overhaul processing performed so that the chuck hole is concentric with the outer cylindrical surface of the roll? Or a waste roll is wise.
[0011]
[Problems to be solved by the invention]
Recycling of straight plate type gravure printing rolls If the rounding process using NC lathes can be adopted instead of grinding wheel polishing in the plate making process of the plate making, even if the roll is repeatedly used many times, Unlike overhaul round machining, the machining allowance can be kept small, so that round machining can be performed with an NC lathe to the extent that the roll base material is not exposed, and iron rolls are degreased. After the nickel plating is applied, the copper sulfate plating is applied, and in the case of aluminum rolls, the nickel plating or zincate method is used in the plate making process where the copper sulfate plating is applied after the zincate or anodal plating pretreatment. Alternatively, it is desirable because it is not necessary to perform anodal plating pretreatment.
In addition, if round processing using an NC lathe can be adopted in place of grinding stone polishing in the plate-making process of recycling plate making of straight plate type gravure printing rolls, the conventional round processing of overhaul using a lathe will be unnecessary. It is desirable that only rolls that are so distorted that they cannot be dealt with by round machining with an NC lathe can be turned to overhaul or used as waste rolls and can be adapted as recyclable rolls at an overwhelming rate.
[0012]
In the present invention, when a roll is attached to an NC lathe and data about rough values of the roll, nickel plating thickness, cell depth, cutting allowance, etc. are input, precise roll measurement is performed. When necessary calculations are performed and there is a prospect that the cylindrical plate processing will be performed appropriately so that the eccentric amount is not too large and the roll base material is not exposed, the end face processing and the cylindrical printing plate processing are automatically executed after measurement. However, when there is no prospect that the plate cylinder processing will be performed properly, the processing is not automatically executed. If the eccentric amount is too large or the plate cylinder processing is performed, the roll base material is exposed. Therefore, it is not necessary to make an artificial decision on whether or not to enter the cylinder printing process from the measured values, and human error is made in the judgment. Can be excluded Jill room, and a problem to be solved is to provide a measurement and 落版 cylindrical working method using NC lathe for 落版 the used straight plate type gravure printing roll.
[0013]
According to the first aspect of the present invention, a pair of conical chuck cones of an NC lathe is fitted with chucked holes on both end surfaces of a plate-making roll that is a used straight plate type gravure printing roll, and the plate-making roll is arranged at both ends. Chuck and measured in advance from the input device attached to the NC lathe The plate made Measured after entering one of the approximate values of the roll length, outer diameter, and chucked hole diameter, and at least the minimum cutting allowance and the post-working plating thickness, which is the copper sulphate plating thickness dimension remaining after processing the cylindrical plate. The measurement probe equipped on the turret tool post of the NC lathe The plate made Touch the roll with multiple points and measure the radius. From the measurement result, the value obtained by adding the minimum cutting allowance to the deviation between the maximum measured radius value and the minimum measured radius value is the maximum cutting allowance. When the allowable cutting allowance, which is the value obtained by subtracting the post-processing plating thickness, which is the thickness dimension of the copper sulfate plating remaining after the inversion cylinder processing, is larger than the maximum cutting allowance, and / or the measurement radius maximum value and the measurement radius minimum value If the amount of eccentricity, which is half the deviation of The plate made Cylinder processing is automatically executed so that the minimum measurement radius point on the roll surface is scraped off with the minimum cutting allowance. as well as When the allowable machining allowance is smaller than the maximum machining allowance and / or the eccentric amount is larger than the allowable eccentric amount big It is intended to provide a measuring and releasing cylinder processing method using an NC lathe for releasing a used straight plate type gravure printing roll, characterized in that it is not immediately transferred to a machining program. .
According to the second aspect of the present invention, a pair of conical chuck cones of an NC lathe are fitted with chucked holes on both end surfaces of a plate-making roll that is a used straight plate type gravure printing roll so that the plate-making roll is chucked at both ends. Measured in advance from an input device attached to the NC lathe. The plate made Measured after entering one of the approximate values of the roll length, outer diameter, and chucked hole diameter, and at least the minimum cutting allowance and the post-working plating thickness, which is the copper sulphate plating thickness dimension remaining after processing the cylindrical plate. The measurement probe equipped on the turret tool post of the NC lathe The plate made Measure the radius of each point by touching many different points in the circumferential direction and generatrix direction of the roll The plate made Measure the plating thickness of the roll end face, and calculate the value obtained by adding the minimum cutting allowance to the deviation between the maximum measured radius value and the minimum measured radius value as the maximum cutting allowance from the measurement result. Calculate the allowable cutting allowance, which is the value obtained by subtracting the plating thickness after processing, which is the thickness dimension of the copper sulfate plating remaining after the inversion cylinder processing, and calculate the diameter value and / or circumferential length after the inversion cylinder processing in advance, These measured values and calculated values are displayed on the display together with the input data from the input device, and the value obtained by adding the minimum cutting allowance to the deviation between the maximum measured radius value and the minimum measured radius value is used as the maximum cutting allowance. When the allowable cutting allowance, which is the value obtained by subtracting the post-processing plating thickness, which is the thickness dimension of the copper sulfate plating remaining after the plate cylinder processing from the plating thickness dimension, is larger than the maximum cutting allowance, and / or the measurement radius maximum value Measurement radius Selection button for automatic transition to machining that automatically shifts to the machining program when the amount of eccentricity that is half the deviation from the value is smaller than the allowable amount of eccentricity, and the allowable cutting allowance is greater than the maximum cutting allowance, or The operator determines whether it is small by checking the display on the display, then turns on one of the processing command selection buttons for executing the release cylinder processing, and turns on the processing automatic transition selection button. Machining when the maximum machining allowance is smaller than the allowable machining allowance and when the machining command selection button is turned on after determining whether or not to machine by looking at the display on the display without turning on the machining command selection button. Move to the program, The plate made End face processing so that copper sulfate plating of a certain thickness remains from the base material surface of the roll end face The plate made Cylinder processing is automatically executed so that the minimum measurement radius point on the roll surface is scraped off with the minimum cutting allowance. as well as When the allowable machining allowance is smaller than the maximum machining allowance and / or the eccentric amount is larger than the allowable eccentric amount big Provide a method of measuring and releasing cylinders using an NC lathe for releasing a used straight plate type gravure printing roll, which is characterized by issuing a warning or a notification that does not shift to a machining program. To do.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a measuring / pressing cylinder processing method using an NC lathe for releasing a used straight plate type gravure printing roll of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of an NC lathe. In this NC lathe, a conical chuck cone 1 provided on a main shaft and a conical chuck cone 2 opposed to a free rotating shaft are on the same horizontal line. The conical chuck cone 1 is rotated by the rotation driving means 3. The conical chuck cone 2 is provided on a bracket 4 that can be moved and adjusted, and can move toward and away from the conical chuck cone 1. The conical chuck cone 1 and the conical chuck cone 2 are fitted into chucked holes on both end surfaces of the plate-making roll R that is a used straight plate type gravure printing roll to chuck the plate-making roll R at both ends. A turret-type tool post 6 is index-rotated on a compound moving table 5 that is NC-movable in a horizontal direction along the plate-making roll R and NC-controllable in a horizontal diameter direction with respect to the plate-making roll R. It is provided to be positioned.
The tool post 6 is provided with various cutting blades 7a, 7b, 7c, 7d,... And a contact probe 8 that is a measurement terminal for measurement. The NC lathe is provided with a display 9 for displaying various numerical values and for supporting the processing order and movement dimensions, and an input device 10 for switching the screen of the display 9 and inputting numerical values.
[0015]
This NC lathe can be shifted to a measurement program when the contact probe 8 is oriented in the horizontal direction perpendicular to the plate-making roll R, and the sphere at the tip of the contact probe 8 becomes the object to be measured. The distance from the origin position to the contact point of the sphere portion at the tip of the contact probe 8 is determined by detecting the direction and the retraction of the contact type probe 8 when the contact makes a slight swing and when it does not shake but retracts even in the length direction. Can be measured in units of μm.
[0016]
As shown in FIG. 1, this NC lathe selects and displays the screen of the data input sheet shown in FIG. 2 on the display 9 before chucking the plate-making roll R with the conical chuck cone 1 and the conical chuck cone 2 at both ends. Then, for the plate-making roll R, numerical values are inputted from the input device 10 for the approximate values of the roll length and outer diameter and the diameter of the hole to be chucked that have been measured in advance. When this NC lathe is provided in the plate making line, the three numerical values may be transferred from the main computer to the NC lathe computer and input.
The thickness of the chrome plating, the thickness of the copper sulfate plating before the plate cylinder processing, the thickness of the nickel plating, the minimum cutting allowance, the allowable eccentricity, and the minimum allowable thickness of the copper sulfate plating remaining after the plate printing cylinder processing, With respect to the thickness of the copper sulfate plating remaining on the processed end face, for example, 8 μm, 130 μm, 2 μm, 48 μm, 30 μm, 20 μm, and 60 μm are displayed on the display 9 as shown in FIG. The automatic input is performed from the beginning, and when it is desired to set a different numerical value, the input device 10 can input the change.
The amount of eccentricity of the roll is unique to each roll, and is half the deviation between the maximum measured radius value and the minimum measured radius value.
On the other hand, the allowable eccentricity input in FIG. 2 is a threshold for checking the magnitude of the roll eccentricity calculated by measurement. If the roll eccentricity is too large, the dynamic unbalance is increased. It is a numerical value for excluding from the object of the stencil printing cylinder processing as a defective roll which occurs and adversely affects image printing and printing of laser plate making.
In addition, when the amount of eccentricity of the roll is larger than the allowable amount of eccentricity, the handling of whether or not to exclude the roll as a defective roll from the subject of the falling plate cylinder processing is processed including another viewpoint.
The allowable cutting allowance is a numerical value for excluding rolls that have a large amount of eccentricity and the maximum cutting allowance becomes large and the roll base material may be exposed when the cylinder is machined. It is.
As for the roll identification number in FIG. 2, the roll identification number recorded on the IC tag attached to the inside of the plate-making roll R is read in advance and numerically input from the input device 10, or this NC lathe is used for the plate making line. The three numerical values may be transferred from the main computer to the NC lathe computer and input.
[0017]
On the data input sheet screen shown in Fig. 2, the automatic chuck button, automatic measurement transfer button, automatic operation transfer button, and measurement execution button are turned on and off using the touch panel input method after the above numerical input is completed. The automatic measurement button can be turned on together with the automatic chuck button, the automatic operation button can be turned on together with the automatic measurement button, and the measurement execution button can be turned on. Can be turned on independently.
The determination button can be turned on when any of the above-mentioned chuck automatic button, automatic measurement transfer button, automatic machining transfer button, or measurement execution button is turned on. Assume that the program is configured to step.
[0018]
When the automatic chuck button is turned on, mutual communication such as information on the size of the plate-making roll R is performed between the roll handling robot (not shown) and the NC lathe, and the chuck and chuck of the plate-making roll R on the NC lathe. It shall be comprised so that cancellation | release is possible. It is assumed that the chuck automatic button blinks during the operation, and turns off when the chuck operation is completed.
When the chuck automatic button is not turned on, it is assumed that the plate-making roll R can be chucked and released by another operation.
[0019]
When the automatic measurement shift button is turned on, after the chuck is completed, the measurement program is automatically stepped, and the tool post 6 shown in FIG. Is configured to move and perform measurement. The automatic measurement shift button is configured to switch from lighting to blinking when measurement is started.
The same is true even if the measurement execution button is turned on. The difference from the automatic measurement transfer button is that there is no reservation for automatic transfer from the chuck operation.
[0020]
When the automatic machining transition button is turned on, the machining program is automatically stepped after the measurement and the tool post 6 shown in FIG. 1 is rotated so that the cutting blades 7a, 7b, 7c, 7d,. It is assumed that one required cutting blade is positioned in a measurable posture, and the compound moving table 5 is configured to move and perform cutting. The processing automatic transition button is configured to switch from lighting to blinking when processing is started.
[0021]
When the measurement program is stepped, the tool post 6 shown in FIG. 1 is rotated so that the probe 8 is positioned in a measurable posture, the compound moving base 5 moves to start measurement, and the display 9 shown in FIG. The screen automatically switches to a screen showing measurement points of the plate-making roll R shown in FIG.
An NC lathe computer (not shown) first corrects the origin by returning the probe 8 to the origin position, and then abuts the abutting surface of the calibrator at the outer position of the spindle corresponding to the origin position. It correct | amends so that it may become an exact position of a radial direction, and it is comprised so that it may measure after moving the probe 8 by the following operation routes after that.
The probe 8 moves to a point (a chrome-plated surface) and touches to measure the dimension A, and then moves to a point b (the surface of the roll base material) and touches it away from the point a. Measure dimension B, then move away from point b to point c (the surface of the roll base material) and touch to measure dimension C, then move away from point c and point d (chromium plating) The dimension D is measured by moving and touching the surface, and these numerical values are displayed on the roll length related table as needed.
Subsequently, the probe 8 moves to a position corresponding to the point p1, touches the point e, measures the radius, then waits away from the point e, and when the plate-making roll R is rotated 90 degrees, f Touch a point to measure the radius. Similarly, touch the point g to measure the radius, then touch the point h to measure the radius, so that the circumferential direction corresponding to the point p1 Measure the four radii.
Similarly, the probe 8 sequentially moves from the point p2 to the point p10 and measures four radii in the circumferential direction corresponding to each point.
In this way, the measured radius value is displayed on the radius measurement value list as needed.
Note that the p1 point is located at a distance of, for example, 100 mm from the end surface, and the pitch from the p1 point to the p10 point is, for example, 150 mm. However, this is not restrictive.
From the relationship between the roll length and the pitch, if the roll length is short, a part from the point p1 to the point p10 cannot be measured.
[0022]
When the above-described measurement by the probe 8 is completed, the display 9 shown in FIG. 1 automatically switches to a screen showing a list of measurement result numerical values shown in FIG. 4, and an NC lathe computer (not shown) is operated in various ways as follows. It is assumed that the calculated value is configured to be displayed on the display 9.
As for the roll length between the end surfaces of the base material in FIG. 4, the subtracted value of CB in FIG. 3 is displayed.
Further, the roll length between the processed end faces is the roll length between the copper sulfate plated faces after the end face processing, and the subtracted value of CB in FIG. 3 is the value after the end face processing in FIG. A value obtained by adding twice the end face plating thickness is displayed.
The measured value average roll diameter in FIG. 4 is a value obtained by doubling the average value of all the numerical values in the radius measured value list in FIG. 3, and this is treated as the original diameter of the roll. In addition, you may display the addition value of the measurement radius maximum value in FIG. 3, and a measurement radius minimum value as a measurement value average roll diameter.
As the measurement radius maximum value and the measurement radius minimum value in FIG. 4, the maximum value and the minimum value in the radius measurement value list in FIG. 3 are displayed.
As for the end face plating thickness in FIG. 4, a subtracted value of B-A in FIG. 3 is displayed.
The end face cutting allowance in FIG. 4 is calculated and displayed by subtracting the end face plated thickness in FIG. 2 from the end face plating thickness value in FIG.
The post-working roll diameter in FIG. 4 is a value obtained by subtracting a value twice the minimum machining allowance from a value twice the minimum measured radius.
As the circumferential length of the roll after processing in FIG. 4, the value of roll diameter after processing × π is displayed, and the size of the plate making design dimension can be recognized by this display.
As the allowable deviation in FIG. 4, a value twice as large as the allowable eccentricity in FIG. 4 is automatically input from the beginning when it is switched and displayed on the screen of the measurement result display sheet shown in FIG. 4.
As the deviation in FIG. 4, a value obtained by subtracting the minimum measurement radius value from the maximum measurement radius value in FIG. 3 is displayed.
As the minimum machining allowance in FIG. 4, the value of the minimum machining allowance in FIG. 2 is displayed.
As the maximum machining allowance in FIG. 4, a value obtained by adding the deviation in FIG. 4 and the minimum machining allowance is displayed.
The allowable cutting allowance in FIG. 4 is a value obtained by subtracting the thickness of the processed copper sulfate plating from the thickness of the copper sulfate plating in FIG.
[0023]
Here, with reference to FIG. 5, the relationship of the dimension of the measurement result in a roll cross section is demonstrated.
There are no rolls that have a perfect circle and the same diameter from one end to the other. Usually, the center of the outer diameter circle and the center of rotation of the roll to be chucked are eccentric. The allowable eccentricity is about 30 μm, and therefore the allowable deviation is 60 μm. As a result of the measurement, when the deviation between the maximum measured radius Rmax and the minimum measured radius Rmini is larger than the allowable deviation 60 μm, a large dynamic imbalance occurs, which adversely affects the image printing and printing of the laser plate making. It can be handled as a bad roll.
Since the measurement radius maximum value Rmax and the measurement radius minimum value Rmini are not necessarily values in the same cross section, the added value of the measurement radius maximum value Rmax and the measurement radius minimum value Rmini is the measurement value average roll in FIG. Although it is not the same as the diameter, it may be treated as a substantially equal value.
The cell with the largest area has the greatest depth. This is the same for etched and engraved cells. The maximum cell depth in the chrome-plated state is about 25 μm.
In order to scrape a cell, it is necessary to make the minimum shaving allowance larger than the maximum depth of the cell. In FIG. 5, the minimum machining allowance is 48 μm.
In order to scrape the cell, if the plate cylinder processing is performed so that the cutting allowance at the point of the measurement radius minimum value Rmini is minimized, the cutting allowance at the point of the measurement radius maximum value Rmax is maximized, and the maximum cutting allowance is Addition value of minimum cutting allowance and deviation.
The thickness of the copper sulfate plating before the release is different depending on the roll and is usually in the range of 100 to 200 μm.
For example, the minimum plating thickness of the copper sulfate plating after the falling cylinder processing (cutting plate processing) at the point of the measurement radius maximum value Rmax is desired to remain, for example, 20 μm. Then, the cutting allowance of the copper sulfate plating at the point of the measurement radius maximum value Rmax is 80 μm at the maximum when the thickness of the copper sulfate plating before the printing plate is 100 μm. When the thickness is 130 μm, the maximum is 110 μm, but these values are not large.
This is because the maximum machining allowance is an added value of the minimum machining allowance and the deviation. If the minimum machining allowance is 48 μm and the eccentricity is 30 μm, for example, the maximum machining allowance is 48 μm + 60 μm = 108 μmm. When the copper sulfate plating thickness is 100 μm, the roll base material is completely exposed on the side of the measurement radius maximum value Rmax, and when the copper sulfate plating thickness before releasing is 130 μm, the measurement is performed. The roll base material is barely exposed on the side of the maximum radius value Rmax, and if the minimum cutting allowance is 48 μm and the eccentricity is 25 μm, the maximum cutting allowance is 48 μm + 50 μm = 98 μm, and the sulfuric acid before release When the thickness of the copper plating is 100 μm, the roll base material is barely exposed on the side of the measurement radius maximum value Rmax.
Based on the above calculation, if the copper sulfate plating thickness before printing is 130 μm, enter the allowable eccentricity as 30 μm, and if the copper sulfate plating thickness before printing is 100 μm, allow it. One guideline is to input the amount of eccentricity as 25 μm.
Note that if the cell depth is reduced to less than 20 μm and the maximum machining allowance is 35 μm, the allowable eccentricity can be further increased. However, this will result in an even worse dynamic balance and run-out. This increases the degree of the image and adversely affects the image printing and printing of the laser plate making. Therefore, it is necessary to limit from this viewpoint.
[0024]
Therefore, if the NC lathe computer (not shown) displays the deviation in FIG. 4 as 62 μm and exceeds the allowable deviation of 60 μm as a result of the measurement, the stop button lights up and the machining program is stepped. It shall be configured not to.
The NC lathe computer (not shown) is configured so that when the maximum machining allowance value in Fig. 4 exceeds the allowable machining allowance value, the exposure warning display blinks and the machining program is not stepped. It shall be.
When it is determined that the exposure processing may be performed and it is desired to perform the cylinder printing, the processing command button in FIG. 4 is turned on. Then, it is assumed that the machining command button is lit and the machining button blinks to step into the machining program.
Also, when handling that should not be exposed, the stop button in FIG. 4 is turned on. Then, the cancel button lights up. It is assumed that the roll is unchucked by another program or manual operation.
When the maximum machining allowance value exceeds the allowable machining allowance value, the exposure process is not always performed immediately. This is because the minimum cutting allowance is set to 20 μm, for example, and safety is observed so that exposure processing is not performed. Therefore, when it is desired to change the value of the minimum machining allowance and recalculate it together with the numerical value of the measurement result, the button for changing the minimum machining allowance is turned on. Then, recalculation is performed for the maximum machining allowance, and it is compared whether or not the calculated maximum machining allowance value is larger than the copper sulfate plating thickness in FIG. It is configured to turn off the exposure warning button and blink the processing command button when the maximum cutting allowance value is larger, when it is desired to check whether or not the exposure processing will be performed when exceeding It shall be. It is assumed that when the machining command button is turned on, the button is switched from blinking to lighting, and the button being machined blinks.
[0025]
Machining is performed from one end surface of the roll, and the end of the roll is rounded with a radius of about 5 mm, and cylindrical cutting is performed from one end to the other end so that the cut is 48 μm on the minimum measured radius side. The other end of the roll is rounded with a radius of about 5 mm, and finally, the cutting is performed on the other end surface of the roll, and the process is finished. The chuck release may be performed automatically or manually.
[0026]
FIG. 6 is a schematic cross-sectional view through the roll diameter showing the relationship between the measurement results, the cylinder processing after the measurement, the build-up of copper sulfate plating, the formation of cells, and the chrome plating that gives printing durability. It is.
(a) shows the relative dimensions of the cross-section passing through the roll diameter before release based on the measurement results.
The value of 138 μm is the value entered in the screen of FIG. 2, and is the total value of the chromium plating thickness of 8 μm and the copper sulfate plating thickness of 130 μm. It is assumed that 30 μm, a copper sulfate plating thickness of 130 μm, and the like are input as the allowable eccentricity in FIG. 2, and half of the deviation between the measurement radius maximum value Rmax and the measurement radius minimum value Rmini is 30 μm. On the screen shown in FIG. 4, the allowable deviation (twice the allowable eccentricity) and the deviation (difference between the maximum measured radius value and the minimum measured radius value) are checked.
In this example, it is marginal, but it is recycled without using a waste roll, and changes in diameter are shown in (b) to (e).
(b) shows the relative dimensions of the cross-section passing through the roll diameter after the stencil cylinder processing by inputting 48 μm as the minimum cutting allowance in the screen of FIG.
The maximum machining allowance including chrome plating is 48 μm + 60 μm = 108 μm. Check that the actual minimum thickness of copper sulfate plating remaining after the inversion cylinder processing does not fall below the allowable minimum thickness of copper sulfate plating that remains after the inversion cylinder processing (input to 20 μm in the screen of FIG. 2). After the measurement, the program checks before processing the released cylinder. In this example, the actual minimum thickness of the copper sulfate plating remaining after the cylinder printing is 138 μm−108 μm = 30 μm, which exceeds the allowable minimum thickness of 20 μm.
As described above, the eccentricity is performed, and the plate cylinder processing is performed, and the side of the measurement radius maximum value is greatly sharpened to improve the dynamic balance.
(c) shows the relative dimensions of the cross section through the roll diameter showing a state in which the overlay of copper sulfate plating is 80 μm.
(d) shows a relational dimension of a cross section passing through a roll diameter showing a state in which a cell is formed by an etching method or an engraving method after finishing polishing so that the radius is reduced to 10 μm by a finish polishing grindstone.
(e) shows the relative dimensions of the cross section through the roll diameter showing the state in which 8 μm of chrome plating is applied. The diameter after chrome plating is approximately equal to the diameter before polishing of the printing plate.
At the next recycling plate making, the amount of eccentricity becomes small.
[0027]
For the cutting process of the roll end face, if the thickness of the copper sulfate plating remaining on the processed end face shown in the screen of FIG. 2 is input as 60 μm, for example, based on the numerical values of B and C shown in the screen of FIG. End face processing is performed so that 60 μm plating remains. In FIG. 6, when 80 μm copper sulfate plating is performed as shown in FIG. 6C, the thickness of the copper sulfate plating on the end face is increased to 80 μm or more due to current concentration and recovered to 140 μm or more. In FIG. 6, as shown in FIG. 6D, the end surface polishing is not performed at the time of the final polishing of 10 μm.
[0028]
In the case of adopting the plate cylinder processing by NC lathe instead of grinding wheel polishing in the plate making process of recycling plate making of straight plate type gravure printing roll, and when adopting the overhaul printing plate cylinder processing by NC lathe as usual It can be applied to any of the above.
[0029]
【The invention's effect】
According to the measuring / pressing plate cylinder processing method by the NC lathe for printing plate of the used straight plate type gravure printing roll according to claim 1,
When a used straight type gravure printing roll is attached to the NC lathe and the rough numerical values of the roll, nickel plating thickness, cell depth, minimum machining allowance, etc. are input, the turret type dual turret of the NC lathe is equipped. Precise roll measurement can be performed with the measurement probe, and the necessary calculation is performed based on the measurement result and input value, and the allowable cutting allowance is larger than the maximum cutting allowance and / or eccentricity When the amount is smaller than the allowable eccentricity, the roll base material can be automatically transferred to the cylinder printing process where the roll base material is not exposed, and the roll base material is exposed when the maximum machining allowance or eccentricity is too large and the cylindrical processing is performed. When there is a possibility of this, machining is not performed automatically, and therefore it is not necessary to manually determine whether or not to enter release plate cylinder machining from the measured values. , It is possible to eliminate the scope for human error in judgment occurs.
According to the measuring / pressing plate cylinder processing method by the NC lathe for printing plate of the used straight plate type gravure printing roll according to claim 2,
When a used straight type gravure printing roll is attached to the NC lathe and the rough numerical values of the roll, nickel plating thickness, cell depth, minimum machining allowance, etc. are input, the turret type dual turret of the NC lathe is equipped. Precise roll measurement can be performed with the measurement probe, and the necessary calculation is performed based on the measurement result and input value, and the allowable cutting allowance is larger than the maximum cutting allowance and / or eccentricity When the amount is smaller than the allowable eccentricity, it can be confirmed on the display that the roll base material will be properly exposed and the cylinder will be exposed, and a button will be selected to automatically shift to processing after measurement. It is possible to cut the point of the end surface processing and the minimum measurement radius of the roll surface with the minimum cutting allowance so that copper sulfate plating of a certain thickness remains from the base material surface of the roll end surface If the maximum cutting allowance or eccentricity is too large and there is a possibility that the roll base material will be exposed if the maximum cutting allowance or eccentricity is too large, do not automatically execute the processing. Warnings are displayed, so there is no need to make a manual decision on whether or not to enter the cylinder printing process from the measured values, and eliminate the possibility of human error in the decision. Can do.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a front view of an NC lathe according to a measuring / pressing cylinder processing method using an NC lathe for releasing a used straight plate type gravure printing roll of the present invention.
FIG. 2 shows a screen of a data input sheet that is selectively displayed on a display attached to the NC lathe.
FIG. 3 shows a screen of measurement points and measurement values of a plate-making roll selectively displayed on a display attached to an NC lathe.
FIG. 4 shows a screen showing a list of numerical values of measurement results selected and displayed on a display attached to the NC lathe.
FIG. 5 is a diagram for explaining the relevance of dimensions of measurement results in a roll section.
FIG. 6 is a cross-sectional view through a typical roll diameter showing the relationship between measurement results, post-measurement cylinder processing, copper sulfate plating overlay, cell formation, and chrome plating for printing durability. Indicates.
[Brief description of symbols]
DESCRIPTION OF SYMBOLS 1 ... Conical chuck cone provided in the main shaft, 2 ... Conical chuck cone on the free rotating shaft, 3 ... Rotation drive means, 4 ... Bracket, R ... Plate making roll, 5 ...・ Multiple moving table, 6 ... Turret type tool post, 7a, 7b, 7c, 7d, ... Cutting tool, 8 ... Contact probe, 9 ... Display, 10 ... Input device,

Claims (2)

A pair of conical chuck cones of the NC lathe were fitted with chucked holes on both end faces of a plate-making roll that is a used straight plate type gravure printing roll to chuck the plate-making roll at both ends, and attached to the NC lathe. Post-processing plating which is a rough value of the length and outer diameter of the plate-making roll measured in advance from the input device and the diameter of the hole to be chucked, and at least the minimum cutting allowance and the thickness dimension of the copper sulfate plating remaining after the cylinder printing Measurement is started after one of the thicknesses is input, and the measurement probe equipped on the turret type tool post of the NC lathe is touched to the plate roll to measure the radius. The thickness dimension of the copper sulfate plating that remains after the stencil cylinder processing from the thickness dimension of the copper sulfate plating, using the value obtained by adding the minimum cutting allowance to the deviation between the maximum radius value and the minimum measured radius value as the maximum cutting allowance. When the allowable machining allowance, which is the value after subtracting the plating thickness after machining, is larger than the maximum machining allowance, and / or the eccentricity that is half the deviation between the maximum measured radius and the minimum measured radius is the allowable eccentricity If it is smaller than that, the process shifts to the machining program and automatically executes the plate cylinder processing so that the point of the measurement radius minimum value of the plate roll surface is cut with the minimum cutting allowance, and the allowable cutting allowance is the maximum. is smaller than machining allowance, and / or size than the eccentric amount allowable eccentricity amount is Itoki, drop the used straight plate type gravure printing roll immediately is characterized in that so as not to shift to the processing program Measuring and dropping cylinder processing method by NC lathe for plate. A pair of conical chuck cones of the NC lathe were fitted with chucked holes on both end faces of a plate-making roll that is a used straight plate type gravure printing roll to chuck the plate-making roll at both ends, and attached to the NC lathe. Post-processing plating which is a rough value of the length and outer diameter of the plate-making roll measured in advance from the input device and the diameter of the hole to be chucked, and at least the minimum cutting allowance and the thickness dimension of the copper sulfate plating remaining after the cylinder printing Measurement is started after one of the thicknesses is input, and the probe for measurement mounted on the turret type tool post of the NC lathe is touched to a number of points different in the circumferential direction and the generatrix direction of the plate making roll. the plating thickness of the 該被plate-making roll end face is measured with measuring the radius of each point, the measurement result, the value obtained by adding the minimum machining allowance on the deviation between measured radial maximum value and the measured minimum radius value most Calculated as the cutting allowance, and calculates the allowable cutting allowance, which is the value obtained by subtracting the post-processing plating thickness, which is the thickness dimension of the copper sulfate plating that remains after the printing plate cylinder, from the thickness of the copper sulfate plating, and the diameter after the printing plate cylinder processing Values and / or circumferential lengths are calculated in advance, and these measured values and calculated values are displayed on the display together with the input data from the input device, and the above-mentioned minimum cutting is performed to the deviation between the measured radius maximum value and the measured radius minimum value. The allowable cutting allowance, which is the value obtained by subtracting the post-processing plating thickness, which is the thickness dimension of the copper sulfate plating remaining after the stencil printing cylinder processing, from the thickness dimension of the copper sulfate plating is the maximum cutting allowance. Selection of automatic machining transition that automatically shifts to the machining program when the eccentricity, which is half the deviation between the maximum measured radius and the minimum measured radius, is smaller than the allowable eccentricity Bo When the operator determines whether the allowable cutting allowance is larger or smaller than the maximum cutting allowance, the operator checks the display on the display and then turns on one of the processing command selection buttons for executing the plate cylinder processing. Whether or not to perform machining when the maximum machining allowance is smaller than the allowable machining allowance and the machining command selection button is not turned on when the automatic machining transition selection button is turned on When the processing command selection button is turned on, the process shifts to a processing program, and the end surface processing and the plate making so that copper sulfate plating of a certain thickness remains from the base material surface of the plate making roll end surface Cylinder processing is automatically executed so that the point of the measurement radius minimum value of the roll surface is cut with the minimum cutting allowance, and when the allowable cutting allowance is smaller than the maximum cutting allowance and / or the eccentric amount Is allowable eccentricity The magnitude than the amount Itoki, measurement and落版cylinder by NC lathe for落版the used straight plate type gravure printing roll, characterized in that is adapted to emit a notification not enter any warning or machining program Processing method.

Images