阅读说明：本技术 一种印刷机压力调节装置及其控制方法 (Pressure adjusting device of printing machine and control method thereof ) 是由 李训艳 王云 孟祥杰 边国栋 于 2021-08-02 设计创作，主要内容包括：本发明公开了一种印刷机压力调节装置及其控制方法,属于印刷机技术领域,印刷机压力调节装置包括平行排列的网辊、版辊和承印辊,版辊位于网辊与承印辊之间,网辊与版辊之间以及版辊与承印辊之间分别设置有用于调节辊间距离的调节机构,调节机构与用于输入控制指令的控制系统电连接；调节机构设置有四个,调节机构由伺服电机、连接于伺服电机输出轴的丝杠以及套装在丝杠上的丝套组成；其控制方法由控制系统自动计算并控制到达离合压位置、滑入滑出位置,同时设置了人工微调系统,可根据产品的印刷效果人工调节,能够实现精确定位且具有可存储性,使得压力调节更方便快捷。(The invention discloses a pressure adjusting device of a printing machine and a control method thereof, belonging to the technical field of printing machines, wherein the pressure adjusting device of the printing machine comprises a screen roller, a printing roller and a printing roller which are arranged in parallel, the printing roller is positioned between the screen roller and the printing roller, adjusting mechanisms for adjusting the distance between the rollers are respectively arranged between the screen roller and the printing roller and between the printing roller and the printing roller, and the adjusting mechanisms are electrically connected with a control system for inputting control instructions; the four adjusting mechanisms are arranged and consist of servo motors, lead screws connected to output shafts of the servo motors and screw sleeves sleeved on the lead screws; the control method is characterized in that the control system automatically calculates and controls the clutch pressure position and the sliding-in and sliding-out position, and meanwhile, the manual fine adjustment system is arranged, so that manual adjustment can be performed according to the printing effect of a product, accurate positioning can be realized, storability is realized, and pressure adjustment is more convenient and faster.)

1. A pressure adjusting device of a printing machine is characterized by comprising a screen roller, a printing roller and a printing roller which are arranged in parallel, wherein the printing roller is positioned between the screen roller and the printing roller, adjusting mechanisms for adjusting the distance between the rollers are respectively arranged between the screen roller and the printing roller and between the printing roller and the printing roller, and the adjusting mechanisms are electrically connected with a control system for inputting a control instruction; the adjusting mechanism is provided with four and consists of a servo motor, a lead screw connected to an output shaft of the servo motor and a screw sleeve sleeved on the lead screw.

2. The pressure regulating device of the printing press according to claim 1, wherein a first servo motor and a second servo motor are respectively installed at two ends of the printing roller, and a first wire sleeve and a second wire sleeve which are matched with the first servo motor and the second servo motor are respectively and correspondingly installed at two ends of the screen roller; and a third servo motor and a fourth servo motor are respectively arranged at two ends of the printing roller, and a third silk sleeve and a fourth silk sleeve which are matched with the third servo motor and the fourth servo motor are respectively and correspondingly arranged at two ends of the printing roller.

3. A control method of a press pressure adjusting device of a printing press according to claim 2, comprising the steps of:

step A1, whether the control system inputs a slide-out instruction or not, and if so, the adjusting mechanism returns to a zero position; if not, go to step A2;

step A2, whether a slide-in command is input by the control system or not, if so, the first servo motor and the second servo motor drive the web roller moving distance S1 to enter a web roller separation position, the third servo motor and the fourth servo motor drive the plate roller moving distance S2 to enter a plate roller separation position, and then step A3 and step A6 are executed; if not, the adjusting mechanism keeps the original position;

step A3, whether the net roller needs to be pressed, if so, the first servo motor and the second servo motor drive the net roller to move for a distance c, and then step A4 is executed; if not, the first servo motor and the second servo motor keep the original position;

step A4, whether the position of the net roller needs to be manually adjusted, if so, executing step A5; if not, go to step A9;

step A5, judging whether the left end of the net roller needs to move, the right end needs to move or both ends need to move simultaneously, and driving the first servo motor when the left end of the net roller needs to move; when the right end of the net roller needs to move, the second servo motor is driven; when the two ends need to move simultaneously, the first servo motor and the second servo motor are driven simultaneously; then step a9 is performed;

step A6, judging whether the plate roller needs to be pressed, if so, driving the mesh roller to move for a distance d by the third servo motor and the fourth servo motor, and then executing step A7; if not, the third servo motor and the fourth servo motor keep the original position;

step A7, whether the position of the plate roller needs to be manually and finely adjusted or not, and if so, executing step A8; if not, go to step A9;

step A8, judging whether the left end of the printing roller needs to move, the right end of the printing roller needs to move or both ends of the printing roller need to move simultaneously, and driving the third servo motor when the left end of the screen roller needs to move; when the right end of the net roller needs to move, the fourth servo motor is driven; when the two ends need to move simultaneously, the third servo motor and the fourth servo motor are driven simultaneously; then step a9 is performed;

step A9, whether the formula is saved or not, if so, executing step A10; if not, ending the task;

and step A10, selecting a formula name, confirming a stored formula, and finishing the task.

4. The control method according to claim 3, wherein the separation distance S1 of the wire roll is a + (D2-D2 ')/2, where a is the sliding separation distance of the wire roll when the plate roll is maximum, c is the nip distance between the wire roll and the plate roll, D2 is the maximum plate roll diameter, and D2' is any plate roll diameter.

5. The control method according to claim 3, wherein the separation distance S2 of the plate roll is b + (D2-S2')/2, where b is the maximum plate roll slip-in separation distance and D is the joint distance of the plate roll and the printing roll.

6. The control method according to claim 3, wherein in step A5 and step A8, when only one of the servo motors is driven, the maximum moving distance of the screen roll or the form roll is 0.5 mm.

7. The control method according to any one of claims 3 to 6, wherein the zero position of the adjustment mechanism is calculated by the control system from the length of the lead screw and the diameter of the web roll, the printing roll, the maximum plate roll diameter or the minimum plate roll diameter.

Technical Field

The invention belongs to the technical field of printing machines, and particularly relates to a pressure adjusting device of a printing machine and a control method thereof.

Background

The screen roller, the printing roller and the printing roller of the traditional printing machine are distributed in a delta shape, the screen roller is adjusted in the horizontal direction through one pressure adjusting mechanism, and the printing roller is adjusted in the vertical direction through the other pressure adjusting mechanism. The conventional pressure regulating mechanism consists of an electromagnetic valve, a valve island and a cylinder, and the switching gas of the valve island is controlled by electrifying and deenergizing the electromagnetic valve, so that the cylinder is controlled to stretch and contract to achieve the purpose of controlling the clutch pressure. The accurate adjustment of pressure in the printing process is realized by manually adjusting mechanical limit, but the digital position storage memory cannot be realized, and further the digital formula management cannot be realized.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the pressure adjusting device of the printing machine and the control method thereof can realize accurate positioning and have storability, so that the pressure adjustment is more convenient and faster.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a pressure adjusting device of a printing machine comprises a screen roller, a printing roller and a printing roller which are arranged in parallel, wherein the printing roller is positioned between the screen roller and the printing roller, adjusting mechanisms for adjusting the distance between the rollers are respectively arranged between the screen roller and the printing roller and between the printing roller and the printing roller, and the adjusting mechanisms are electrically connected with a control system for inputting a control command; the adjusting mechanism is provided with four and consists of a servo motor, a lead screw connected to an output shaft of the servo motor and a screw sleeve sleeved on the lead screw.

Furthermore, a first servo motor and a second servo motor are respectively installed at two ends of the printing roller, and a first wire sleeve and a second wire sleeve which are matched with the first servo motor and the second servo motor are respectively and correspondingly installed at two ends of the screen roller; and a third servo motor and a fourth servo motor are respectively arranged at two ends of the printing roller, and a third silk sleeve and a fourth silk sleeve which are matched with the third servo motor and the fourth servo motor are respectively and correspondingly arranged at two ends of the printing roller.

A control method of a pressure adjusting device of a printing press comprises the following steps:

step A1, whether the control system inputs a slide-out instruction or not, and if so, the adjusting mechanism returns to a zero position; if not, go to step A2;

step A2, whether a slide-in command is input by the control system or not, if so, the first servo motor and the second servo motor drive the web roller moving distance S1 to enter a web roller separation position, the third servo motor and the fourth servo motor drive the plate roller moving distance S2 to enter a plate roller separation position, and then step A3 and step A6 are executed; if not, the adjusting mechanism keeps the original position;

step A3, whether the net roller needs to be pressed, if so, the first servo motor and the second servo motor drive the net roller to move for a distance c, and then step A4 is executed; if not, the first servo motor and the second servo motor keep the original position;

step A4, whether the position of the net roller needs to be manually adjusted, if so, executing step A5; if not, go to step A9;

step A5, judging whether the left end of the net roller needs to move, the right end needs to move or both ends need to move simultaneously, and driving the first servo motor when the left end of the net roller needs to move; when the right end of the net roller needs to move, the second servo motor is driven; when the two ends need to move simultaneously, the first servo motor and the second servo motor are driven simultaneously; then step a9 is performed;

step A6, judging whether the plate roller needs to be pressed, if so, driving the mesh roller to move for a distance d by the third servo motor and the fourth servo motor, and then executing step A7; if not, the third servo motor and the fourth servo motor keep the original position;

step A7, whether the position of the plate roller needs to be manually and finely adjusted or not, and if so, executing step A8; if not, go to step A9;

step A8, judging whether the left end of the printing roller needs to move, the right end of the printing roller needs to move or both ends of the printing roller need to move simultaneously, and driving the third servo motor when the left end of the screen roller needs to move; when the right end of the net roller needs to move, the fourth servo motor is driven; when the two ends need to move simultaneously, the third servo motor and the fourth servo motor are driven simultaneously; then step a9 is performed;

step A9, whether the formula is saved or not, if so, executing step A10; if not, ending the task;

and step A10, selecting a formula name, confirming a stored formula, and finishing the task.

Further, the separation and pressing distance S1 of the mesh roller is a + (D2-D2 ')/2, where a is the sliding separation and pressing distance of the mesh roller when the plate roller is maximum, c is the combined pressing distance between the mesh roller and the plate roller, D2 is the maximum plate roller diameter, and D2' is any plate roller diameter.

Further, the distance S2 between the plate roller and the printing roller is b + (D2-S2')/2, where b is the maximum distance between the plate roller and the printing roller, and D is the distance between the plate roller and the printing roller.

Further, in the step a5 and the step A8, when only one servo motor is driven, the maximum moving distance of the screen roll or the plate roll is 0.5 mm.

Further, the zero position of the adjusting mechanism is calculated by the control system according to the length of the lead screw and the diameters of the screen roller, the printing roller, the maximum plate roller or the minimum plate roller.

After the technical scheme is adopted, the invention has the beneficial effects that:

the printing machine pressure adjusting device comprises a screen roller, a printing roller and a printing roller which are arranged in parallel, wherein the printing roller is positioned between the screen roller and the printing roller, adjusting mechanisms for adjusting the distance between the rollers are respectively arranged between the screen roller and the printing roller and between the printing roller and the printing roller, and the adjusting mechanisms are electrically connected with a control system for inputting a control command; the four adjusting mechanisms are arranged, each adjusting mechanism is composed of a servo motor, a lead screw connected to an output shaft of the servo motor and a screw sleeve sleeved on the lead screw, the screen roller and the printing roller perform pressure adjustment through horizontal linear motion, the servo motors can achieve accurate positioning of the printing roller and the screen roller, and the screen roller and the printing roller can be stored by matching with a control system, so that the pressure adjustment becomes more convenient and faster.

The control method of the pressure adjusting device of the printing machine can automatically calculate the clutch pressure position and the sliding-in and sliding-out position by the control system according to the specific printing plate roller value, automatically reaches the designated position according to the operation instruction, is provided with the manual fine adjustment system, can manually adjust according to the printing effect of the product, is completely and automatically memorized and stored after being adjusted for each fixed product, and only needs to call out the related formula during the later operation, thereby being convenient and rapid.

In summary, the pressure adjusting device and the control method thereof of the printing machine solve the problems that in the prior art, the pressure adjustment is inconvenient when the printing rollers with different diameters are used due to the fact that the screen roller, the printing roller and the printing roller are distributed in a delta shape, and the storage and the memory of the digital positions cannot be realized.

Drawings

FIG. 1 is a schematic view showing the construction of a pressure regulating control apparatus of a printing press according to the present invention;

FIG. 2 is a schematic view of the web roll and the largest roll in the zero position;

FIG. 3 is a schematic view of the wire roll and the take-up roll in a disengaged position;

FIG. 4 is a schematic view of the mesh roll and the random plate roll in a nip position;

FIG. 5 is a flow chart of a control method of the press pressure adjustment apparatus of the present invention;

in the figure, 1-screen roller, 2-plate roller, 3-printing roller, 4-first servo motor, 5-first silk sleeve, 6-second servo motor, 7-second silk sleeve, 8-third servo motor, 9-third silk sleeve, 10-fourth servo motor, 11-fourth silk sleeve and 12-lead screw.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

All directions referred to in the present specification are based on the drawings, and represent relative positional relationships only, and do not represent absolute positional relationships.

The first embodiment is as follows:

as shown in fig. 1, a pressure adjusting device of a printing machine includes a screen roller, a printing roller and a printing roller which are arranged in parallel, the printing roller is located between the screen roller and the printing roller, adjusting mechanisms for adjusting the distance between the rollers are respectively arranged between the screen roller and the printing roller and between the printing roller and the printing roller, and the adjusting mechanisms are electrically connected with a control system for inputting a control command.

As shown in fig. 1, four adjusting mechanisms are provided, and each adjusting mechanism is composed of a servo motor, a lead screw connected to an output shaft of the servo motor, and a screw sleeve sleeved on the lead screw. The first servo motor and the second servo motor are respectively installed at two ends of the printing roller, and the first wire sleeve and the second wire sleeve matched with the first servo motor and the second servo motor are respectively and correspondingly installed at two ends of the screen roller. And a third servo motor and a fourth servo motor are respectively arranged at two ends of the printing roller, and a third silk sleeve and a fourth silk sleeve which are matched with the third servo motor and the fourth servo motor are respectively and correspondingly arranged at two ends of the printing roller. Since the printing roll is stationary, the third and fourth servo motors may be mounted on a frame (not shown) at both ends of the printing roll. The four servo motors can respectively drive the two ends of the screen roller and the two ends of the printing roller, automatic adjustment and manual adjustment of the printing roller and the screen roller can be achieved through the control system, and the positions of the printing roller and the screen roller have storability, so that pressure adjustment becomes more convenient and faster.

Example two:

the control method of the pressure adjusting device of the printing machine in the first embodiment comprises the following steps:

step A1, controlling whether the system inputs a slide-out instruction, and if so, returning the adjusting mechanism to a zero position; if not, go to step A2; the zero position of the adjusting mechanism is calculated by the control system according to the length of the lead screw and the diameters of the screen roller, the printing roller, the maximum plate roller or the minimum plate roller.

Step A2, whether a slide-in command is input by the control system or not, if so, the first servo motor and the second servo motor drive the net roller to move by a distance S1 to enter a net roller separation position, the third servo motor and the fourth servo motor drive the plate roller to move by a distance S2 to enter a plate roller separation position, and then step A3 and step A6 are executed; if not, the adjustment mechanism remains in the home position.

Step A3, whether the net roller needs to be pressed, if so, the first servo motor and the second servo motor drive the net roller to move for a distance c, and then step A4 is executed; if not, the first servo motor and the second servo motor keep the original position.

Step A4, whether the position of the net roller needs to be manually adjusted, if so, executing step A5; if not, step A9 is performed. Wherein, whether the fine adjustment is needed manually and the specific adjustment distance in the following steps A5-A8 are judged by the staff according to the actual printing effect.

Step A5, judging whether the left end of the net roller needs to move, the right end needs to move or both ends need to move simultaneously, and driving a first servo motor when the left end of the net roller needs to move; when the right end of the net roller needs to move, a second servo motor is driven; when the two ends need to move simultaneously, the first servo motor and the second servo motor are driven simultaneously; step a9 is then performed. When only the first servo motor or the second servo motor is driven, the maximum moving distance of one end of the net roller is 0.5mm, and the net roller is prevented from being damaged due to overlarge distance.

Step A6, judging whether the plate roller needs to be pressed, if so, driving the mesh roller to move by a distance d by a third servo motor and a fourth servo motor, and then executing step A7; if not, the third servo motor and the fourth servo motor keep the original position.

Step A7, whether the position of the plate roller needs to be manually and finely adjusted, if so, executing step A8; if not, step A9 is performed.

Step A8, judging whether the left end of the printing roller needs to move, the right end needs to move or both ends need to move simultaneously, and driving a third servo motor when the left end of the screen roller needs to move; when the right end of the net roller needs to move, a fourth servo motor is driven; when the two ends need to move simultaneously, the third servo motor and the fourth servo motor are driven simultaneously; step a9 is then performed. When only the third servo motor or the fourth servo motor is driven, the maximum moving distance of one end of the plate roller is 0.5mm, and the plate roller is prevented from being damaged due to overlarge distance.

Step A9, whether the formula is saved or not, if so, executing step A10; if not, the task is ended.

And step A10, selecting a formula name, confirming a stored formula, and finishing the task.

According to fig. 2, 3 and 4, the distance L1 between the zero position of the mesh roller and the zero position of the plate roller and the distance L2 between the zero position of the plate roller and the center of the printing roller are respectively as follows:

the distance the mesh roller moves when sliding into the pressed-off position

Distance traveled by the plate roller sliding into the disengaged position

Wherein a is the sliding-in and pressing distance of the screen roller when the printing roller is maximum, b is the sliding-in and pressing distance of the maximum printing roller, c is the combined pressing distance between the screen roller and the printing roller, D is the combined pressing distance between the printing roller and the printing roller, D1 is the diameter of the screen roller, D2 is the maximum diameter of the printing roller, D2' is the diameter of any printing roller, and D3 is the diameter of the printing roller. Therefore, in step a2, the web roll separation distance S1 and the plate roll separation distance S2 are:

according to the control method of the pressure adjusting device of the printing machine, the clutch pressure position and the sliding-in and sliding-out position are automatically calculated by the control system according to the specific printing plate roller value and automatically reach the designated position according to the operation instruction, meanwhile, the manual fine adjustment system is arranged, manual adjustment can be performed according to the printing effect of the product, all fixed products are automatically memorized and stored after being adjusted, only related formulas need to be called out during later operation, and the method is convenient and rapid.

While specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the described embodiments are only some, and not all, of the present invention, which is presented by way of example only, and the scope of the invention is defined by the appended claims. Various changes or modifications to these embodiments may be made by those skilled in the art without departing from the principle and spirit of the invention, and these changes and modifications all fall within the scope of the invention.