Control method and control device for carrying out blowing operation on wringing roller of cleaning machine

Abstract

The invention provides a control method and a control device for carrying out blowing operation on a wringing roller of a cleaning machine, and the method comprises the following steps: receiving plate information, calculating the accumulated working time T of the wringing roller, comparing the obtained accumulated working time T of the wringing roller with a preset opening threshold Ta of a first electromagnetic valve corresponding to a plate, a first electromagnetic valve is controlled to be opened; and the accumulated working duration T of the wringing roller is compared with an opening threshold Tb1 or Tbn, or the accumulated working duration T is sequentially compared with adjacent opening thresholds Tbi and Tb (i + 1) of each second electromagnetic valve corresponding to each preset blowing area corresponding to the plate, and the opening degree of the second electromagnetic valves is controlled. The device has the advantages that targeted air blowing is carried out according to the residual oil conditions of the wringing roller areas corresponding to different parts of different plates, and the air blowing starting time, the air blowing duration and the air flow of the wringing roller areas corresponding to different parts of different plates are accurately controlled; accurate blowing of the wringing roller areas corresponding to different parts of different plates is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile manufacturing, and in particular to a control method and a control device for performing an air blowing operation on a squeezing roller of a cleaning machine. Background Art

[0002] The cleaning machine cleans the impurities on the surface of the sheet 4 and leaves a uniform oil film on the surface of the sheet 4 to ensure the forming of the sheet 4. The most important part of the cleaning machine is the squeeze roller. Generally, the squeeze roller includes two pairs of squeeze rollers in front and back, and each pair of squeeze rollers consists of an upper squeeze roller and a lower squeeze roller. The sheet 4 is squeezed and conveyed between the corresponding upper squeeze roller and the lower squeeze roller. Before the sheet 4 enters the squeeze roller, the oil is pumped onto the sheet 4 through the oil pumping device. A pressure of 80-120 bar is applied to the squeeze rollers. The squeeze rollers are made of adsorbent materials such as non-woven fabrics. When the sheet 4 passes through the squeeze rollers, the squeeze rollers can squeeze and absorb the excess oil and other impurities on the surface of the sheet 4, thereby ensuring that a normal oil film thickness is formed on the surface of the sheet 4.

[0003] On the one hand, for some panels 4, such as the side panels 41, oil film residue often remains in some areas due to their shapes. Figure 1 As shown, oil film residue often appears in the areas corresponding to the oil film thickness detection points 2-9 and 3-8, and it is also found that there is residual oil at the corresponding positions of the squeeze roller.

[0004] On the other hand, different plates 4 have different thicknesses, and are subjected to different squeezing effects by the squeezing rollers. For thinner plates 4 , there will be more residual oil, which will affect the quality of the plates 4 .

[0005] On the other hand, after the squeeze roller has been running for a long time, its adsorption capacity decreases, causing the squeeze roller to harden and the squeeze effect to decrease, which further leads to an increase in residual oil on the surface of the plate 4, affecting the quality of the plate 4. At this time, even if the pressure between the upper squeeze roller and the lower squeeze roller is increased, the residue cannot be reduced, and the squeeze roller can only be replaced, which increases the cost and affects the production progress.

[0006] Invention patent content

[0007] In order to solve at least one of the above-mentioned technical problems, the present invention provides a control method and a control device for blowing operation on a squeezing roller of a cleaning machine, wherein a plurality of blowing units are arranged along the axial direction of the squeezing roller, and the blowing of each area of ​​the squeezing roller corresponding to each blowing unit is controlled separately according to the sheet information.

[0008] The present invention solves the technical problem by adopting the following technical solution:

[0009] A control method for blowing air to a squeezing roller of a cleaning machine, wherein the squeezing roller system of the cleaning machine comprises an air blowing device, a squeezing roller and a controller, wherein the air blowing device is used for blowing air to the squeezing roller, and comprises an air supply pipe and an air blowing unit, wherein the air supply pipe is provided with a first electromagnetic valve; m (m≥2, and m is an integer) air blowing units are distributed along the axis direction of the squeezing roller, each of the air blowing units comprises an air guide pipe and an air blowing pipe, each of the air blowing pipes is connected to the air supply pipe through a corresponding air guide pipe, and each of the air guide pipes is provided with a second electromagnetic valve; each of the air blowing pipes extends along the axis direction of the squeezing roller; each of the air blowing pipes is provided with an air blowing hole; the controller is electrically connected to the first electromagnetic valve and each of the second electromagnetic valves;

[0010] The control method is executed by a controller and comprises the following steps:

[0011] S1. Receive plate information and determine the preset first solenoid valve opening threshold T corresponding to the plate. a , the preset blowing areas of the squeeze roller corresponding to the sheet, and the n opening thresholds T of each second solenoid valve corresponding to each preset blowing area corresponding to the sheet bi , where i = 1, 2, 3, ..., n, and n ≥ 2, and T b(i+1) >T bi ≥T a ;

[0012] S2, calculating the cumulative working time T of the squeeze roller;

[0013] S3, the accumulated working time T of the squeeze roller is obtained and the preset first electromagnetic valve opening threshold T corresponding to the plate is a For comparison:

[0014] If T ≥ T a , then open the first solenoid valve;

[0015] If T < T a , then keep the first solenoid valve in a closed state;

[0016] S4, n opening thresholds T of each second solenoid valve corresponding to each preset blowing area corresponding to the plate bi The opening threshold T of each second solenoid valve corresponding to each preset blowing area corresponding to the plate is selected b1 , or the opening threshold T bn , or adjacent opening threshold T bi and T b(i+1) , where i≤n-1;

[0017] i starts from 1 and is taken in ascending order to n-1. The accumulated working time T of the squeeze roller is compared with the opening threshold T of each second solenoid valve corresponding to each preset blowing area corresponding to the sheet. b1 Compare with or with the turn-on threshold T bn Compare, or in turn with the adjacent opening threshold T bi and T b(i+1) Compare, specifically:

[0018] When i=1, if T<T b1 , then each second solenoid valve corresponding to each preset blowing area corresponding to the plate is kept in a closed state;

[0019] If T ≥ T b1 , then the accumulated working time T of the squeeze roller is compared with the next opening threshold T b2 Make comparisons;

[0020] In sequence, the value of i increases by 1 until i reaches n-1, and the cumulative working time T of the squeeze roller is compared with the last opening threshold T bn Compare and obtain the interval where the cumulative working time T of the squeeze roller is located;

[0021] When 1≤i≤n-1, if T bi ≤T<T b(i+1) , then the opening of the second solenoid valve corresponding to each preset blowing area corresponding to the plate is adjusted to the preset i-th opening X i ;

[0022] When i=n, if T≥T bn , then the opening of the second solenoid valve corresponding to each preset blowing area corresponding to the plate is adjusted to the preset nth opening X n .

[0023] Furthermore, the first solenoid valve is intermittently opened, and the control method for opening the first solenoid valve comprises the following steps:

[0024] S5, according to the preset i-th opening X of the second solenoid valve corresponding to each preset blowing area corresponding to the plate i , determine the preset standard blowing interval time t of the first solenoid valve corresponding to the i-th opening of the second solenoid valve corresponding to each preset blowing area ai , Pre-set standard blowing time t bi and adjustment coefficient k;

[0025] S6, receiving the current viscosity M of the cleaning oil and the air pressure P of the air pipeline;

[0026] S7, when 1≤i≤n-1, according to the preset standard blowing interval time t of the first solenoid valve corresponding to the i-th opening of the second solenoid valve corresponding to each preset blowing area ai , Pre-set standard blowing time t bi , adjustment coefficient k, pre-stored standard viscosity M0 of cleaning oil and standard pressure P0 of air pipe, received current viscosity M of cleaning oil and air pressure P of air pipe, obtain the blowing interval time t of the first solenoid valve corresponding to the i-th opening of the second solenoid valve corresponding to each pre-set blowing area corresponding to the plate 1i and blowing time t 2i , the blowing interval time of the first solenoid valve is t 1i and blowing time t 2i Determined by the following formula:

[0027] Formula 1: t 1i =k*t ai (0.1≤k<1);

[0028] Formula 2: t 2i =[M / M0]*[P0 / P]*t bi ;

[0029] S8, according to the obtained blowing interval time t of the first solenoid valve 1i and blowing time t 2i performing an opening and closing operation on the first solenoid valve;

[0030] S9, when i=n, ​​when the preset standard blowing interval time length t of the first solenoid valve corresponding to the nth opening of the second solenoid valve corresponding to each preset blowing area corresponding to the plate an Greater than 0, preset standard blowing time t bn When it is greater than 0, the blowing interval time t of the first solenoid valve corresponding to the nth opening of the second solenoid valve corresponding to each preset blowing area corresponding to the plate is obtained by formula 1 and formula 2 in S7. 1n and blowing time t 2n ;

[0031] When the preset standard blowing interval time length t of the first solenoid valve corresponding to the nth opening of the second solenoid valve corresponding to the preset blowing area an =0, preset standard blowing time t bn When it is normally open, keep the first solenoid valve normally open;

[0032] Intermittent air blowing is performed on the pre-set blowing area to ensure that when blowing away the residual oil, over-blowing of the squeeze roller is avoided, which may cause aging of the squeeze roller.

[0033] Furthermore, the plate includes a first plate group and a second plate group, the first plate group includes a top cover, a front door outer panel, a rear door outer panel, a hood, a rear cover outer panel and a fender, and the second plate group includes a side panel.

[0034] Further, when the plate is any one of the first plate group, the number n of opening thresholds of each second solenoid valve corresponding to each preset blowing area of ​​the squeeze roller corresponding to the plate is 2, and the opening threshold T bi T b1 and T b2 , and T b1 <T b2 ;

[0035] Accordingly, when T b1 ≤T<T b2 When the opening degree of the second electromagnetic valve corresponding to each preset blowing area corresponding to the plate is the preset first opening degree X 1 ;

[0036] When T ≥ T b2 When the opening degree of the second electromagnetic valve corresponding to each preset blowing area corresponding to the plate is the preset second opening degree X 2 , and X 2 ≥X 1 ;

[0037] Correspondingly, with the first opening X 1 The preset standard blowing time of the corresponding first solenoid valve is t b1 , the preset standard blowing interval is t a1 ; and the second opening X 2 The preset standard blowing time of the corresponding first solenoid valve is t b2 The preset standard blowing interval is t a2 .

[0038] Furthermore, the opening threshold T of each second solenoid valve corresponding to each plate of the first plate group is b1 The opening threshold is T b2 One of 3800-4200h;

[0039] First opening X 1 The second opening is between 30% and 50%. 2 One of 80%-100%;

[0040] With the first opening X 1 The preset standard blowing time t of the corresponding first solenoid valve b1The pre-set standard blowing interval time t is one of 15-25s a1 One of 35-45s; and the second opening X 2 The preset standard blowing time t of the corresponding first solenoid valve b2 The pre-set standard blowing interval time t is between 35 and 45 seconds. a2 One of 15-25s.

[0041] Furthermore, the opening threshold value T of each second solenoid valve corresponding to each plate of the first plate group is b1 is 2000h, the opening threshold T b2 4000h;

[0042] First opening X 1 is 50%, the second opening is X 2 is 100%;

[0043] With the first opening X 1 The preset standard blowing time t of the corresponding first solenoid valve b1 The preset standard blowing interval time t is 20s. a1 40s; and the second opening X 2 The preset standard blowing time t of the corresponding first solenoid valve b2 The preset standard blowing interval time t is 40s. a2 is 20s.

[0044] Furthermore, when the plate is a side panel, the pre-set blowing area of ​​the squeeze roller corresponding to the side panel has a first position and a second position, the first position is an area corresponding to the C-pillar, and the second position is an area of ​​the squeeze roller other than the first position; the number n of opening thresholds of the second solenoid valve corresponding to the area of ​​the squeeze roller corresponding to the C-pillar is 3, and the opening threshold T bi T b1 , T b2 and T b3 , and T b1 <T b2 <T b3 The number n of opening thresholds of each second solenoid valve corresponding to the second position of the squeeze roller is 2, and the opening threshold T bi T b2 and T b3 ;

[0045] Accordingly, when T b1 ≤T<T b2 When the opening of the second electromagnetic corresponding to the area of ​​the squeeze roller corresponding to the C-pillar part is the preset first opening X 1, each second solenoid valve corresponding to the second position of the squeeze roller remains in a closed state;

[0046] When T b2 ≤T<T b3 When the opening of the second electromagnetic corresponding to the area of ​​the squeeze roller corresponding to the C-pillar part is the preset second opening X 2 The opening degree of each second solenoid valve corresponding to the second position of the squeeze roller is the corresponding preset first opening degree X 1 ′;

[0047] When T ≥ T b3 When the opening of the second electromagnetic corresponding to the area of ​​the squeeze roller corresponding to the C-pillar part is the preset third opening X 3 The opening degree of each second solenoid valve corresponding to the second position of the squeeze roller is the corresponding preset second opening degree X 2 ′;

[0048] Correspondingly, with the first opening X 1 The preset standard blowing time of the corresponding first solenoid valve is t b1 The preset standard blowing interval is t a1 ; and the second opening X 2 and the first opening X 1 The preset standard blowing time of the first solenoid valve corresponding to ' is t b2 The preset standard blowing interval is t a2 ; and the third opening X 3 and the second opening X 2 'The corresponding preset standard blowing time t of the first solenoid valve b3 Normally open, with a preset standard blowing interval time t a3 is 0.

[0049] Furthermore, the opening thresholds T of the second electromagnetics corresponding to the respective parts of the side surround are b1 The opening threshold is T b2 The opening threshold is T b3 One of 3800-4200h;

[0050] First opening X 1 The second opening is between 30% and 50%. 2 is one of 80%-100%; the third opening X 3 is one of 80%-100%; the first opening X 1 ' is one of 30%-50%, the second opening X 2 ' is one of 80%-100%;

[0051] With the first opening X 1 The preset standard blowing time t of the corresponding first solenoid valve b1 The pre-set standard blowing interval time t is one of 15-25s a1 One of 35-45s; and the second opening X 2 and the first opening X 1 'The corresponding preset standard blowing time t of the first solenoid valve b2 The pre-set standard blowing interval time t is between 35 and 45 seconds. a2 One of 15-25s.

[0052] Furthermore, the opening thresholds T of the second electromagnetics corresponding to the respective parts of the side surround are b1 is 1000h, the opening threshold T b2 is 2000h, the opening threshold T b3 4000h;

[0053] First opening X 1 is 50%, the second opening is X 2 is 100%; the third opening X 3 is 100%; the first opening X 1 ' is 50%, the second opening X 2 ′ is 100%;

[0054] With the first opening X 1 The preset standard blowing time t of the corresponding first solenoid valve b1 The preset standard blowing interval time t is 20s. a1 40s; and the second opening X 2 and the first opening X 1 'The corresponding preset standard blowing time t of the first solenoid valve b2 The preset standard blowing interval time t is 40s. a2 is 20s.

[0055] Furthermore, the plate information is determined by the following steps:

[0056] The plate information is determined according to a pre-stored plate information mapping table; the plate information mapping table includes: a first electromagnetic valve opening threshold T corresponding to the plate a , each preset blowing area of ​​the squeeze roller corresponding to the sheet, each opening threshold T of each second solenoid valve corresponding to each preset blowing area corresponding to the sheet bi, the opening degrees X of each second solenoid valve corresponding to each preset blowing area corresponding to the plate i , and each opening X i The preset standard blowing interval time t of the corresponding first solenoid valve ai , Pre-set standard blowing time t bi and adjustment coefficient k.

[0057] Furthermore, the number of the blowing units is 6-9, and the squeezing roller is correspondingly divided into 6-9 blowing areas in the axial direction of the squeezing roller. Setting a suitable number of blowing units can meet the blowing requirements of different areas of each plate and has universality.

[0058] Furthermore, a control device for blowing air on a squeezing roller of a cleaning machine is provided, the control device being applied to the controller described above, and the control device comprising:

[0059] The plate information determination module is configured to receive the plate information and determine the preset first solenoid valve opening threshold T corresponding to the plate according to the received plate information. a , the preset blowing areas of the squeeze roller corresponding to the sheet, and the n opening thresholds T of each second solenoid valve corresponding to each preset blowing area corresponding to the sheet bi ;

[0060] A squeeze roller cumulative working time calculation module, configured to calculate the squeeze roller cumulative working time T;

[0061] The first electromagnetic valve opening determination module is configured to compare the obtained cumulative working time T of the squeeze roller with the preset first electromagnetic valve opening threshold T corresponding to the plate. a For comparison:

[0062] If T ≥ T a , then open the first solenoid valve;

[0063] If T < T a , then keep the first solenoid valve in a closed state;

[0064] The second solenoid valve opening determination module is configured to determine n opening thresholds T of each second solenoid valve corresponding to each preset blowing area corresponding to the plate. bi The opening threshold T of each second solenoid valve corresponding to each preset blowing area corresponding to the plate is selected b1 , or the opening threshold T bn , or adjacent opening threshold T bi and T b(i+1) , where i≤n-1;

[0065] i starts from 1 and is taken in ascending order to n-1. The accumulated working time T of the squeeze roller is compared with the opening threshold T of each second solenoid valve corresponding to each preset blowing area corresponding to the sheet. b1 Compare with or with the turn-on threshold T bn Compare, or in turn with the adjacent opening threshold T bi and T b(i+1) Compare, specifically:

[0066] When i=1, if T<T b1 , then each second solenoid valve corresponding to each preset blowing area corresponding to the plate is kept in a closed state;

[0067] If T ≥ T b1 , then the accumulated working time T of the squeeze roller is compared with the next opening threshold T b2 Make comparisons;

[0068] In sequence, the value of i increases by 1 until i reaches n-1, and the cumulative working time T of the squeeze roller is compared with the last opening threshold T bn Compare and obtain the interval where the cumulative working time T of the squeeze roller is located;

[0069] When 1≤i≤n-1, if T bi ≤T<T b(i+1) , then the opening of the second solenoid valve corresponding to each preset blowing area corresponding to the plate is adjusted to the preset i-th opening X i ;

[0070] When i=n, if T≥T bn , then the opening of the second solenoid valve corresponding to each preset blowing area corresponding to the plate is adjusted to the preset nth opening X n .

[0071] Compared with the prior art, the present invention has the following beneficial effects:

[0072] (1) By setting up an air blowing pipeline, the excess residual oil on the surface of the squeeze roller can be blown away during production, which can enhance the adsorption capacity of the squeeze roller, thereby extending the life of the squeeze roller, avoiding too frequent replacement of the squeeze roller, reducing replacement time, and reducing time cost and equipment cost.

[0073] (2) It can prevent excessive cleaning oil from remaining on the surface of the sheet, reducing sheet quality problems during the production process; at the same time, it avoids the direct effect of the blowing airflow on the sheet, ensuring the consistency and uniformity of the oil film thickness on the sheet, thereby ensuring the quality of the sheet.

[0074] (3) The blowing device has a simple structure and is easy to arrange. The blowing device can be added without changing the structure of the existing cleaning machine. The blowing pipe is arranged between the two upper squeezing rollers, and the two upper squeezing rollers can be blown at the same time to improve efficiency.

[0075] (4) According to the residual oil situation in the squeezing roller area corresponding to different parts of different plates, targeted blowing is carried out, and the blowing start time, blowing duration and air flow rate of the squeezing roller area corresponding to different parts of different plates are accurately controlled, so as to achieve accurate blowing in the squeezing roller area corresponding to different parts of different plates, improve the control accuracy of blowing, and solve the problem of cleaning oil residue in a targeted manner, so as to achieve the purpose of removing residual oil as needed, which not only saves energy but also protects the squeezing roller and avoids aging and shortening of the squeezing roller life due to over-blowing. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] Figure 1 Schematic diagram of the side oil film thickness detection points.

[0077] Figure 2 It is a schematic diagram of the axial structure of the squeezing roller system of the cleaning machine of the present invention.

[0078] Figure 3 It is a schematic diagram of the transverse structure of the axis of the squeeze roller system of the cleaning machine of the present invention.

[0079] Figure 4 This is a control flow chart of the present invention for performing air blowing operation on the squeezing roller of the cleaning machine.

[0080] In the figure: 1-air delivery pipe; 11-first solenoid valve; 12-pressure gauge; 2-air blowing unit; 21-air guide pipe; 22-air blowing pipe; 23-second solenoid valve; 31-first upper squeezing roller; 32-second upper squeezing roller; 33-first lower squeezing roller; 34-second lower squeezing roller; 4-plate material; 41-side enclosure. DETAILED DESCRIPTION

[0081] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0082] In the description of the present invention, it should be noted that the terms “first” and “second” are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0083] The present invention provides a control method for blowing air on a squeeze roller of a cleaning machine, referring to Figure 2 and Figure 3As shown, the squeezing roller system of the cleaning machine includes a blowing device, a squeezing roller and a controller. The blowing device is used to blow air to the squeezing roller, including an air supply pipe 1 and a blowing unit 2, and the air supply pipe 1 is provided with a first solenoid valve 11. There are m (m≥2, and m is an integer) blowing units 2 distributed along the axial direction of the squeezing roller, each of the blowing units 2 includes an air guide pipe 21 and an air blowing pipe 22, each of the air blowing pipes 22 is connected to the air supply pipe 1 through the corresponding air guide pipe 21, and each of the air guide pipes 21 is provided with a second solenoid valve 23. Each of the air blowing pipes 22 extends along the axial direction of the squeezing roller; each of the air blowing pipes 22 is provided with a blowing hole. Preferably, the blowing holes are multiple through holes distributed along the axial direction of the blowing pipe 22, or the blowing holes are long holes extending along the axial direction of the blowing pipe 22, so that the blowing holes basically cover the entire blowing pipe 22, so that the air flow is evenly blown to the squeezing roller. The controller is electrically connected to the first solenoid valve 11 and each of the second solenoid valves 23 .

[0084] When the squeeze roller is squeezing the sheet 4, the first solenoid valve 11 and the second solenoid valve 23 can be opened to connect the compressed air, and the compressed air is used to blow the squeeze roller to evaporate the excess residual oil on the surface of the squeeze roller, blow away the residual oil, and enhance the adsorption capacity of the squeeze roller, thereby extending the life of the squeeze roller, avoiding too frequent replacement of the squeeze roller, reducing the replacement time, and reducing the time cost and equipment cost. After the compressed air blows away the excess residual oil on the surface of the squeeze roller, it can prevent the sheet 4 from having too much cleaning oil on the surface after passing through the squeeze roller, and reduce the quality problems of the sheet 4 in the production process. Blowing the squeeze roller avoids the direct effect of the blowing airflow on the sheet 4, ensures the consistency and uniformity of the oil film thickness on the sheet 4, and ensures the quality of the sheet 4.

[0085] The length of the squeeze roller is generally 4.2 meters, and the width of the plate 4 is generally about 3.5 meters. Residual oil will be generated in most areas of the squeeze roller. In the axial direction of the squeeze roller, in order to cover at least 80% of the length of the squeeze roller, preferably, the blowing units 2 are 6-9, and the distance L between adjacent blowing pipes 22 is 40-80 cm. Each of the blowing pipes 22 extends along the axial direction of the squeeze roller, and the head of a blowing pipe 22 is close to the tail of its adjacent blowing pipe 22, and the distance between the heads of adjacent blowing pipes 22 or the distance between the tails of adjacent blowing pipes 22 is 40-80 cm. For example, the blowing units 2 can be set to 6, and the distance L between adjacent blowing pipes 22 is set to 70 cm, that is, the length of each blowing pipe 22 is approximately 70 cm, or the blowing units 2 can be set to 7, and the distance L between adjacent blowing pipes 22 is set to 60 cm, that is, the length of each blowing pipe 22 is approximately 60 cm. In this way, the blowing pipe 22 basically covers the entire squeezing roller area. By arranging the blowing pipe 22 reasonably, the squeezing roller can be divided into multiple blowing areas accordingly. According to the residual oil situation in the squeezing roller area corresponding to different parts of different plates 4, the corresponding second solenoid valve 23 can be opened for targeted blowing. This can adapt to the blowing needs of different areas of each plate 4 and has universality.

[0086] The squeezing rollers include a first upper squeezing roller 31, a second upper squeezing roller 32, a first lower squeezing roller 33 and a second lower squeezing roller 34. According to the space arrangement on site, the blowing unit 2 can be arranged between the first upper squeezing roller 31 and the second upper squeezing roller 32; or, the blowing unit 2 can also be arranged between the first lower squeezing roller 33 and the second lower squeezing roller 34; or, the blowing unit 2 can be arranged between the first upper squeezing roller 31 and the second upper squeezing roller 32, and between the first lower squeezing roller 33 and the second lower squeezing roller 34 at the same time.

[0087] As a preferred embodiment, Figure 3 As shown, the blowing unit 2 is arranged between the first upper squeezing roller 31 and the second upper squeezing roller 32, and there is a layout space above the cleaning machine, which can make it more convenient to arrange the blowing device. The blowing pipe 22 blows air to the two upper squeezing rollers at the same time, blowing and evaporating the excess cleaning oil on the surfaces of the two upper squeezing rollers, thereby enhancing the adsorption capacity of the squeezing rollers. Since the upper and lower squeezing rollers are squeezed and contacted with each other, the upper squeezing roller can absorb the excess cleaning oil on the surface of the lower squeezing roller, so that the upper and lower squeezing rollers can be cleaned of the excess cleaning oil, thereby avoiding residue on the plate 4. At this time, the blowing holes can be set to at least two groups, facing the first upper squeezing roller 31 and the second upper squeezing roller 32 respectively, and the excess residual oil on the surfaces of the first upper squeezing roller 31 and the second upper squeezing roller 32 can be blown away at the same time to improve efficiency.

[0088] The air flow to the squeeze roller is about 6 bar. In order to avoid damaging the squeeze roller, Figure 3 As shown in the direction of the middle arrow, the air outlet direction of the blowing hole is tangent to the surface of the first upper squeezing roller 31 and the second upper squeezing roller 32, and the airflow blown out of the blowing hole blows tangentially to the squeezing roller to avoid the airflow directly blowing to the squeezing roller for a long time to damage the squeezing roller.

[0089] The control method is executed by a controller, referring to Figure 4 As shown, steps S1-S4 are included.

[0090] In step S1, the information of the plate 4 is usually the model information of the plate 4, which can be identified by the model of the plate 4 pre-stored in the controller. For example, when cleaning the plate 4, the corresponding ID number of the plate 4 is imported into the controller, and the information of the plate 4 can be determined according to the ID number of the plate 4. According to the information of the plate 4, the preset opening threshold T of the first electromagnetic valve 11 corresponding to the plate 4 can be determined. a , the pre-set blowing areas corresponding to the squeezing roller and the plate 4, and the opening status of the second solenoid valve 23 corresponding to each blowing area.

[0091] As the use time of the squeeze roller increases, the adsorption function of the squeeze roller decreases, resulting in excessive residual cleaning oil on the plate 4. The blowing time can be reduced accurately according to the adsorption capacity of the squeeze roller. In steps S2 and S3, the accumulated working time T of the squeeze roller is matched with the preset opening threshold T of the first electromagnetic valve 11 corresponding to the plate 4. a In comparison, it is determined whether the blowing device needs to be turned on, so that the air outlet device can be turned on in a targeted manner according to the state of the squeezing roller.

[0092] A second solenoid valve 23 is provided corresponding to each preset blowing area. Whether to blow air to the corresponding squeezing roller area is determined by the opening and closing state of the second solenoid valve 23, and the size of the airflow when blowing air to the corresponding squeezing roller area is controlled by the opening degree of the second solenoid valve 23.

[0093] In step S4, the accumulated working time T of the squeeze roller is adjusted to the opening threshold T of the second solenoid valve 23 corresponding to the blowing area. b1 Compare with or with the turn-on threshold T bn Compare with or with the adjacent opening threshold T bi and T b(i+1)By comparison, the time interval of the accumulated working time T of the squeeze roller can be determined, so as to determine whether the second electromagnetic valve 23 needs to be opened and the opening degree when it is opened. In this way, the second electromagnetic valve 23 can be opened in a targeted manner, and air can be blown in a targeted manner according to the different residual oil conditions of each area of ​​the squeeze roller corresponding to the plate 4, so as to achieve accurate air blowing of the area of ​​the squeeze roller corresponding to the plate 4, so as to achieve the purpose of removing residual oil as needed and protect the squeeze roller, so as to avoid blowing air to the area with less residual oil and shortening the life of the squeeze roller due to aging caused by excessive air blowing.

[0094] The first solenoid valve 11 is opened intermittently, referring to Figure 4 As shown, the control method for opening the first electromagnetic valve 11 includes steps S5-S9. It can be understood that the intermittent opening of the first electromagnetic valve 11 includes the intermittent opening of the first electromagnetic valve 11 during the entire use of the squeeze roller, and also includes the intermittent opening of the first electromagnetic valve 11 during part of the use of the squeeze roller.

[0095] When it is determined that the blowing device needs to be turned on according to the accumulated working time T of the squeeze roller, the first solenoid valve 11 can be opened intermittently to blow air intermittently to the pre-set blowing area to ensure that when blowing away the residual oil, over-blowing of the squeeze roller is avoided to cause aging of the squeeze roller.

[0096] In steps S5-S8, the opening degree X of the second electromagnetic valve 23 can be determined according to the time interval of the accumulated working time T of the squeeze roller. i , corresponding to the different opening degrees X of the second solenoid valve 23 i The first solenoid valve 11 has a corresponding preset standard blowing interval time t ai , Pre-set standard blowing time t bi and adjustment coefficient k; the controller also pre-stores the standard viscosity M0 of the cleaning oil and the standard air pressure P0 of the air pipe 1; by measuring the current viscosity M of the cleaning oil and the air pressure P of the air pipe 1, the openings X of the second solenoid valve 23 corresponding to each pre-set blowing area corresponding to the plate 4 can be obtained according to formulas 1 and 2. i The corresponding blowing interval time t of the first solenoid valve 11 is 1i and blowing time t 2i , and the first solenoid valve 11 is opened and closed accordingly. The lower the blowing pressure, the longer the blowing time and the shorter the interval time; the higher the viscosity of the cleaning oil, the longer the blowing time and the shorter the interval time; the longer the total working time of the squeeze roller, the larger the opening of the second solenoid valve 23, the longer the blowing time and the shorter the interval time. In this way, the blowing time can be more accurately controlled by the cumulative working time of the squeeze roller and the opening of the second solenoid valve 23, avoiding the problem of shortening the life of the squeeze roller due to aging caused by overblowing.

[0097] In formula 1, the preset standard blowing interval time t of the first solenoid valve 11 is ai When the cleaning machine cleans the corresponding plate 4, when the squeezing roller is not blown, the time it takes for the surface of the squeezing roller to go from the initial no-residue working state to the surface residue, k is a preset adjustment coefficient, 0.1≤k≤1. In formula 2, the preset standard blowing time t bi , the cleaning machine cleans the corresponding plate 4. When residue appears on the surface of the squeeze roller, the residual cleaning oil on the surface of the squeeze roller is blown away with compressed air with a standard compressed air pressure P0, so that the squeeze roller reaches a residue-free working state for a long time. The standard viscosity M0 of the cleaning oil is generally 4mm 2 / s, the current viscosity M of the cleaning oil can be detected by a viscosity sensor, and the viscosity of the cleaning oil can be detected periodically. The detection period can be set to 12-16 days. When the viscosity of the cleaning oil increases, the detection period can be shortened and the blowing time can be adjusted in time. The compressed air used to blow air to the squeeze roller can be supplied from the factory pump room. The standard air pressure P0 of the supplied compressed air is generally 5.5-6bar. However, due to the transportation distance between the pump room and the cleaning machine and the use of compressed air in other workshops, the air pressure of the compressed air reaching the air pipe 1 will fluctuate. The pressure P of the current air pipe 1 can be detected by setting a pressure gauge 12 on the air pipe 1.

[0098] In step S9, for the plate 4 with serious residual oil, the preset standard blowing interval time t of the first solenoid valve 11 corresponding to the nth opening of the second solenoid valve 23 corresponding to the preset blowing area is an Can be set to 0, preset standard blowing time t bn It can be set to normally open. At this time, the first solenoid valve 11 is kept normally open to enhance the effect of blowing to remove residual oil.

[0099] The plate 4 includes a first plate group and a second plate group, wherein the first plate group includes a top cover, a front door outer panel, a rear door outer panel, a hood, a rear cover outer panel and a fender, and the second plate group includes a side panel 41. Compared with the first plate group, the second plate group causes a more serious residue on the squeeze roller when passing through the squeeze roller, and the opening threshold T of the second solenoid valve 23 can be set according to the corresponding residue of each plate 4. bi When the plate 4 is the plate 4 of the first plate group, the opening thresholds T of the two second solenoid valves 23 can be set. b1 and T b2 When the plate 4 is the side wall 41, the squeeze roller area corresponding to the C-pillar part of the side wall 41 is more likely to have residues, and the residual oil is more serious. The second solenoid valve 23 corresponding to the squeeze roller area corresponding to the C-pillar part can be set with three opening thresholds T b1 , T b2and T b3 , blow air to the squeeze roller area corresponding to the C-pillar earlier to reduce residual oil. Outside the area corresponding to the C-pillar, each second solenoid valve 23 corresponding to the second position of the squeeze roller can be set with two opening thresholds T b2 and T b3 , the second solenoid valve 23 corresponding to the area corresponding to the C-pillar reaches its corresponding second opening threshold value T b2 When each second solenoid valve 23 corresponding to the second position of the squeeze roller also reaches its corresponding first opening threshold value T b2 , the second solenoid valve 23 corresponding to the area corresponding to the C-pillar reaches its corresponding third opening threshold value T b3 When each second solenoid valve 23 corresponding to the second position of the squeeze roller also reaches its corresponding second opening threshold value T b3 This can not only meet the blowing requirements of the squeezing roller areas corresponding to different parts of the side enclosure 41, but also facilitate the control of the opening of the second solenoid valve 23 corresponding to different areas of the squeezing roller.

[0100] The sheet 4 information is determined by the following steps:

[0101] According to the pre-stored plate 4 information mapping table, the plate 4 information is determined; the plate 4 information mapping table includes: the first electromagnetic valve 11 opening threshold T corresponding to the plate 4 a , each preset blowing area of ​​the squeeze roller corresponding to the sheet 4, each opening threshold T of each second solenoid valve 23 corresponding to each preset blowing area corresponding to the sheet 4 bi , the opening degrees X of each second solenoid valve 23 corresponding to each preset blowing area corresponding to the plate 4 i , and each opening X i The preset standard blowing interval time t of the corresponding first solenoid valve 11 is ai , Pre-set standard blowing time t bi and adjustment coefficient k.

[0102] In order to facilitate the understanding of the present invention, the control method of the blowing operation is described below by taking the top cover, the hair cover and the side enclosure 41 as an example. The blowing unit 2 is set to 7, and the squeeze roller is divided into 7 blowing areas accordingly. The standard viscosity M0 of the cleaning oil is 4 mm 2 / s, the standard air pressure P0 of the air pipe 1 is 6 bar, according to the total working time T of the squeezing roller, the opening of each second solenoid valve 23, the information of each plate 4, the measured current cleaning oil viscosity M corresponding to the total working time T of the squeezing roller and the air pressure P of the air pipe 1, as shown in Table 1.

[0103] Table 1 Second solenoid valve opening table

[0104]

[0105] For the top cover, the blowing area of ​​the squeeze roller is pre-set to be area 3-5, and only the area 3-5 of the squeeze roller is blown. The pre-set opening threshold value T of the first electromagnetic valve 11 a is 2000h, and the opening threshold T of each second solenoid valve 23 corresponding to regions 3-5 is b1 is 2000h, the opening threshold T b2 is 4000h, the total working time of the squeeze roller T and T b1 and T b2 For example, when T=1800h, the total working time T of the squeeze roller is less than 2000h, and the first solenoid valve 11 and all the second solenoid valves 23 are in the closed state. For example, when T=2600h, the total working time T of the squeeze roller is between 2000-4000h, the first solenoid valve 11 is opened, and at the same time, the second solenoid valves 23 corresponding to the areas 3-5 are opened according to the first opening X. 1 (50%) is opened, and the other second solenoid valves 23 remain closed. At this time, according to formula 1 and formula 2, the blowing interval length t of the first solenoid valve 11 11 =0.8*40=32s, blowing time t 21 =5 / 4*6 / 5.8*20=26s. When the total working time T of the squeeze roller reaches 4000h, for example, when T=4500h, the first solenoid valve 11 is opened, and at the same time, the second solenoid valve 23 corresponding to the area 3-5 is opened according to the second opening X 2 (100%) is opened, and the other second solenoid valves 23 remain closed. At this time, according to formula 1 and formula 2, the blowing interval length t of the first solenoid valve 11 is 12 =0.6*20=12s, blowing time t 22 =[6 / 4]*[6 / 6.1]*40=59s.

[0106] For the hair cover, the blowing area of ​​the squeeze roller is pre-set as area 1-7, and it is necessary to blow air to all areas of the squeeze roller. The pre-set opening threshold T of the first electromagnetic valve 11 a is 2000h, the opening threshold T of each second solenoid valve 23 b1 is 2000h, the opening threshold T b2 is 4000h, the total working time of the squeeze roller T and T b1 and T b2The first electromagnetic valve 11 and the second electromagnetic valve 23 are compared and the opening conditions of the first electromagnetic valve 11 and the second electromagnetic valve 23 are determined. For example, when T=1800h, the total working time T of the squeeze roller is less than 2000h, and the first electromagnetic valve 11 and all the second electromagnetic valves 23 are in the closed state. For example, when T=2600h, the total working time T of the squeeze roller is between 2000-4000h, the first electromagnetic valve 11 is opened, and at the same time, all the second electromagnetic valves 23 are opened according to the first opening X. 1 (50%) is opened. At this time, according to Formula 1 and Formula 2, the blowing interval time t of the first solenoid valve 11 is 11 =0.7*40=28s, blowing time t 21 =5 / 4*6 / 5.8*20=26s. When the total working time T of the squeeze roller reaches 4000h, for example, when T=4500h, the first electromagnetic valve 11 is opened, and at the same time, all the second electromagnetic valves 23 are opened according to the second opening X 2 (100%) is open. At this time, according to Formula 1 and Formula 2, the blowing interval time t of the first solenoid valve 11 is 12 =0.5*20=10s, blowing time t 22 =6 / 4*6 / 6.1*40=59s.

[0107] For the side panel 41, the blowing area pre-set by the squeeze roller is area 1-7, and all areas of the squeeze roller need to be blown, and area 5 corresponding to the C-pillar needs to be opened in advance. The pre-set opening threshold T of the first solenoid valve 11 a is 1000h, and the opening threshold T of the second solenoid valve 23 corresponding to area 5 b1 is 1000h, the opening threshold T b2 is 2000h, the opening threshold T b3 is 4000h, and the opening threshold T of each second solenoid valve 23 corresponding to the remaining areas b2 is 2000h, the opening threshold T b3 is 4000h, the total working time of the squeeze roller T and T b1 , T b2 and T b3 For example, when T=800h, the total working time T of the squeeze roller is less than 1000h, and the first solenoid valve 11 and all the second solenoid valves 23 are in the closed state. For example, when T=1600h, the total working time T of the squeeze roller is between 1000-2000h, the first solenoid valve 11 is opened, and at the same time, the second solenoid valve 23 corresponding to the area 5 is opened according to the first opening X. 1 (50%) is opened, and the other second solenoid valves 23 remain closed, and only the area 5 is blown. At this time, according to formula 1 and formula 2, the blowing interval length t of the first solenoid valve 11 11=0.7*40=28s, blowing time t 21 =5 / 4*6 / 5.8*20=26s. For example, when T=2600h, the total working time T of the squeeze roller is between 2000-4000h, the first solenoid valve 11 is opened, and at the same time, all the second solenoid valves 23 are opened, and the second solenoid valves 23 corresponding to the area 5 are opened according to the corresponding second opening X 2 (100%) is opened, and the other second solenoid valves 23 are opened according to the corresponding first opening X 1 (50%) is opened. At this time, according to Formula 1 and Formula 2, the blowing interval time t of the first solenoid valve 11 is 12 =0.6*20=12s, blowing time t 22 =6 / 4*6 / 6.1*40=59s. When the total working time T of the squeeze roller reaches 4000h, for example, when T=4500h, the first solenoid valve 11 is opened, and at the same time, the second solenoid valve 23 corresponding to the area 5 is opened according to the corresponding third opening X 3 (100%) is opened, and the other second solenoid valves 23 are opened according to the corresponding second opening degrees X 2 (100%) open, that is, all the second solenoid valves 23 are opened at 100% opening. At this time, the residual oil situation is serious, and the first solenoid valve 11 remains normally open to continue blowing.

[0108] According to the above method, the blowing of the squeeze roller is controlled until the life of the squeeze roller expires and a new squeeze roller is replaced. It should be noted that when the cleaning machine is stopped, the squeeze roller stops being used, and the first electromagnetic valve 11 needs to be closed, and the air path of the blowing device needs to be closed to avoid over-blowing and aging of the squeeze roller. At the same time, all the second electromagnetic valves 23 can also be closed. In this way, according to the residual oil situation of the squeeze roller area corresponding to different parts of different plates 4, targeted blowing is carried out, and the blowing opening time, blowing duration, and air flow rate of the squeeze roller area corresponding to different parts of different plates 4 are accurately controlled to achieve accurate blowing of the squeeze roller area corresponding to different parts of different plates 4, improve the control accuracy of blowing, solve the problem of residual cleaning oil in a targeted manner, and achieve the purpose of removing residual oil as needed, which not only saves energy, but also protects the squeeze roller, and avoids over-blowing and shortening the life of the squeeze roller. According to the above method, the blowing of the squeeze roller is controlled, and the replacement cycle of the squeeze roller is increased from half a year to one and a half years, which greatly improves the service life of the squeeze roller.

[0109] On the other hand, the present invention further provides a control device for performing an air blowing operation on a squeezing roller of a cleaning machine, the control device being applied to the controller described above, and the control device comprising:

[0110] The plate 4 information determination module is configured to receive the plate 4 information and determine the preset opening threshold T of the first solenoid valve 11 corresponding to the plate 4 according to the received plate 4 information. a , the preset blowing areas of the squeeze roller corresponding to the sheet 4, and the n opening thresholds T of each second solenoid valve 23 corresponding to each preset blowing area corresponding to the sheet 4 bi ;

[0111] A squeeze roller cumulative working time calculation module, configured to calculate the squeeze roller cumulative working time T;

[0112] The first electromagnetic valve 11 opening determination module is configured to compare the obtained cumulative working time T of the squeeze roller with the preset first electromagnetic valve 11 opening threshold T corresponding to the plate 4. a For comparison:

[0113] If T ≥ T a , then the first solenoid valve 11 is opened;

[0114] If T < T a , then keep the first solenoid valve 11 in a closed state;

[0115] The second electromagnetic valve 23 opening determination module is configured to determine n opening thresholds T of each second electromagnetic valve 23 corresponding to each preset blowing area corresponding to the plate 4. bi The opening threshold T of each second solenoid valve 23 corresponding to each preset blowing area corresponding to the plate 4 is selected. b1 , or the opening threshold T bn , or adjacent opening threshold T bi and T b(i+1) , where i≤n-1;

[0116] i starts from 1 and is taken to n-1 in ascending order, and the accumulated working time T of the squeeze roller is compared with the opening threshold T of each second electromagnetic valve 23 corresponding to each preset blowing area corresponding to the sheet 4. b1 Compare with or with the turn-on threshold T bn Compare, or in turn with the adjacent opening threshold T bi and T b(i+1) Compare, specifically:

[0117] When i=1, if T<T b1 , then each second solenoid valve 23 corresponding to each preset blowing area corresponding to the plate 4 is kept in a closed state;

[0118] If T ≥ T b1 , then the accumulated working time T of the squeeze roller is compared with the next opening threshold T b2Make comparisons;

[0119] In sequence, the value of i increases by 1 until i reaches n-1, and the cumulative working time T of the squeeze roller is compared with the last opening threshold T bn Compare and obtain the interval where the cumulative working time T of the squeeze roller is located;

[0120] When 1≤i≤n-1, if T bi ≤T<T b(i+1) , then the opening of the second solenoid valve 23 corresponding to each preset blowing area corresponding to the plate 4 is adjusted to the preset i-th opening X i ;

[0121] When i=n, if T≥T bn , then the opening of the second electromagnetic valve 23 corresponding to each preset blowing area corresponding to the plate 4 is adjusted to the preset nth opening X n .

[0122] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for controlling the blowing operation of a squeezing roller of a cleaning machine, characterized in that: The squeezing roller system of the cleaning machine comprises an air blowing device, a squeezing roller and a controller. The air blowing device is used to blow air to the squeezing roller, and comprises an air supply pipe and an air blowing unit. The air supply pipe is provided with a first electromagnetic valve. m (m≥2, and m is an integer) air blowing units are distributed along the axis direction of the squeezing roller. Each of the air blowing units comprises an air guide pipe and an air blowing pipe. Each of the air blowing pipes is connected to the air supply pipe through a corresponding air guide pipe. Each of the air guide pipes is provided with a second electromagnetic valve. Each of the air blowing pipes extends along the axis direction of the squeezing roller. Each of the air blowing pipes is provided with an air blowing hole. The controller is electrically connected to the first electromagnetic valve and each of the second electromagnetic valves. The control method is executed by a controller and comprises the following steps: S1. Receive plate information and determine the preset first solenoid valve opening threshold T corresponding to the plate. a , the preset blowing areas of the squeeze roller corresponding to the sheet, and the n opening thresholds T of each second solenoid valve corresponding to each preset blowing area corresponding to the sheet bi , where i = 1, 2, 3, ..., n, and n ≥ 2, and T b(i+1) >T bi ≥T a ; S2, calculating the cumulative working time T of the squeeze roller; S3, the accumulated working time T of the squeeze roller is obtained and the preset first electromagnetic valve opening threshold T corresponding to the plate is a For comparison: If T ≥ T a , then open the first solenoid valve; If T < T a , then keep the first solenoid valve in a closed state; S4, n opening thresholds T of each second solenoid valve corresponding to each preset blowing area corresponding to the plate bi The opening threshold T of each second solenoid valve corresponding to each preset blowing area corresponding to the plate is selected b1 , or the opening threshold T bn , or adjacent opening threshold T bi and T b(i+1) , where i≤n-1; i starts from 1 and is taken in ascending order to n-1. The accumulated working time T of the squeeze roller is compared with the opening threshold T of each second solenoid valve corresponding to each preset blowing area corresponding to the sheet. b1 Compare with or with the turn-on threshold T bn Compare, or in turn with the adjacent opening threshold T bi and T b(i+1) Compare, specifically: When i=1, if T<T b1 , then each second solenoid valve corresponding to each preset blowing area corresponding to the plate is kept in a closed state; If T ≥ T b1 , then the accumulated working time T of the squeeze roller is compared with the next opening threshold T b2 Make comparisons; In sequence, the value of i increases by 1 until i reaches n-1, and the cumulative working time T of the squeeze roller is compared with the last opening threshold T bn Compare and obtain the interval where the cumulative working time T of the squeeze roller is located; When 1≤i≤n-1, if T bi ≤T<T b(i+1) , then the opening of the second solenoid valve corresponding to each preset blowing area corresponding to the plate is adjusted to the preset i-th opening X i ; When i=n, if T≥T bn , then the opening of the second solenoid valve corresponding to each preset blowing area corresponding to the plate is adjusted to the preset nth opening X n .

2. The method for controlling the blowing operation of the squeezing roller of the cleaning machine according to claim 1, characterized in that: The first solenoid valve is intermittently opened, and the control method for opening the first solenoid valve comprises the following steps: S5, according to the preset i-th opening X of the second solenoid valve corresponding to each preset blowing area corresponding to the plate i , determine the preset standard blowing interval time t of the first solenoid valve corresponding to the i-th opening of the second solenoid valve corresponding to each preset blowing area ai , Pre-set standard blowing time t bi and adjustment coefficient k; S6, receiving the current viscosity M of the cleaning oil and the air pressure P of the air pipeline; S7, when 1≤i≤n-1, according to the preset standard blowing interval time t of the first solenoid valve corresponding to the i-th opening of the second solenoid valve corresponding to each preset blowing area ai , Pre-set standard blowing time t bi , adjustment coefficient k, pre-stored standard viscosity M0 of cleaning oil and standard pressure P0 of air pipe, received current viscosity M of cleaning oil and air pressure P of air pipe, obtain the blowing interval time t of the first solenoid valve corresponding to the i-th opening of the second solenoid valve corresponding to each pre-set blowing area corresponding to the plate 1i and blowing time t 2i , the blowing interval time of the first solenoid valve is t 1i and blowing time t 2i Determined by the following formula: Formula 1: t 1i =k*t ai (0.1≤k<1); Formula 2: t 2i =[M / M0]*[P0 / P]*t bi ; S8, according to the obtained blowing interval time t of the first solenoid valve 1i and blowing time t 2i performing an opening and closing operation on the first solenoid valve; S9, when i=n, ​​when the preset standard blowing interval time length t of the first solenoid valve corresponding to the nth opening of the second solenoid valve corresponding to each preset blowing area corresponding to the plate an Greater than 0, preset standard blowing time t bn When it is greater than 0, the blowing interval time t of the first solenoid valve corresponding to the nth opening of the second solenoid valve corresponding to each preset blowing area corresponding to the plate is obtained by formula 1 and formula 2 in S7. 1n and blowing time t 2n ; When the preset standard blowing interval time length t of the first solenoid valve corresponding to the nth opening of the second solenoid valve corresponding to the preset blowing area an =0, preset standard blowing time t bn When it is normally open, keep the first solenoid valve normally open.

3. The method for controlling the blowing operation of the squeezing roller of the cleaning machine according to claim 2, characterized in that: The plate material includes a first plate material group and a second plate material group, wherein the first plate material group includes a top cover, a front door outer panel, a rear door outer panel, a hood, a rear cover outer panel and a fender, and the second plate material group includes a side panel.

4. The method for controlling the air blowing operation of the squeezing roller of the cleaning machine according to claim 3, characterized in that: When the plate is any one of the first plate group, the number n of opening thresholds of each second solenoid valve corresponding to each preset blowing area of ​​the squeeze roller corresponding to the plate is 2, and the opening threshold T bi T b1 and T b2 , and T b1 <T b2 ; Accordingly, when T b1 ≤T<T b2 When the opening degree of the second electromagnetic valve corresponding to each preset blowing area corresponding to the plate is the preset first opening degree X1; When T ≥ T b2 When the opening degree of the second electromagnetic valve corresponding to each preset blowing area corresponding to the plate is a preset second opening degree X2, and X2 ≥ X1; Correspondingly, the preset standard blowing time length of the first solenoid valve corresponding to the first opening X1 is t b1 , the preset standard blowing interval is t a1 The preset standard blowing time of the first solenoid valve corresponding to the second opening X2 is t b2 The preset standard blowing interval is t a2 .

5. The method for controlling the air blowing operation of the squeezing roller of the cleaning machine according to claim 4, characterized in that: The opening threshold T of each second solenoid valve corresponding to each plate of the first plate group is b1 The opening threshold is T b2 One of 3800-4200h; The first opening X1 is one of 30%-50%, and the second opening X2 is one of 80%-100%; The preset standard blowing time t of the first solenoid valve corresponding to the first opening X1 b1 The pre-set standard blowing interval time t is one of 15-25s a1 The preset standard blowing time t of the first solenoid valve corresponding to the second opening X2 is 35-45s; b2 The pre-set standard blowing interval time t is between 35 and 45 seconds. a2 One of 15-25s.

6. The method for controlling the air blowing operation of the squeezing roller of the cleaning machine according to claim 4 or 5, characterized in that: The opening threshold T of each second solenoid valve corresponding to each plate of the first plate group is b1 is 2000h, the opening threshold T b2 4000h; The first opening X1 is 50%, and the second opening X2 is 100%; The preset standard blowing time t of the first solenoid valve corresponding to the first opening X1 b1 The preset standard blowing interval time t is 20s. a1 The preset standard blowing time t of the first solenoid valve corresponding to the second opening X2 is 40s; b2 The preset standard blowing interval time t is 40s. a2 is 20s.

7. The method for controlling the air blowing operation of the squeezing roller of the cleaning machine according to claim 3, characterized in that: When the plate is a side panel, the preset blowing area of ​​the squeeze roller corresponding to the side panel has a first position and a second position, the first position is the area corresponding to the C-pillar, and the second position is other squeeze roller areas other than the first position; the number n of opening thresholds of the second solenoid valve corresponding to the squeeze roller area corresponding to the C-pillar is 3, and the opening threshold T bi T b1 , T b2 and T b3 , and T b1 <T b2 <T b3 The number n of opening thresholds of each second solenoid valve corresponding to the second position of the squeeze roller is 2, and the opening threshold T bi T b2 and T b3 ; Accordingly, when T b1 ≤T<T b2 When the opening degree of the second electromagnetic valve corresponding to the area of ​​the squeeze roller corresponding to the C-pillar part is the preset first opening degree X1, each second electromagnetic valve corresponding to the second position of the squeeze roller remains in a closed state; When T b2 ≤T<T b3 When the opening degree of the second electromagnetic valve corresponding to the area of ​​the squeeze roller corresponding to the C-pillar part is the preset second opening degree X2, the opening degree of each second electromagnetic valve corresponding to the second position of the squeeze roller is the corresponding preset first opening degree X1′; When T ≥ T b3 When the opening degree of the second electromagnetic valve corresponding to the area of ​​the squeeze roller corresponding to the C-pillar part is the preset third opening degree X3, the opening degree of each second electromagnetic valve corresponding to the second position of the squeeze roller is the corresponding preset second opening degree X2′; Correspondingly, the preset standard blowing time length of the first solenoid valve corresponding to the first opening X1 is t b1 The preset standard blowing interval is t a1 The preset standard blowing time of the first solenoid valve corresponding to the second opening X2 and the first opening X1′ is t b2 The preset standard blowing interval is t a2 ; The preset standard blowing time t of the first solenoid valve corresponding to the third opening X3 and the second opening X2 ' b3 Normally open, with a preset standard blowing interval time t a3 is 0.

8. The method for controlling the air blowing operation of the squeezing roller of the cleaning machine according to claim 7, characterized in that: The opening threshold T of each second electromagnetic corresponding to each part of the side panel b1 The opening threshold is T b2 The opening threshold is T b3 One of 3800-4200h; The first opening X1 is one of 30%-50%, and the second opening X2 is one of 80%-100%; the third opening X3 is one of 80%-100%; the first opening X1′ is one of 30%-50%, and the second opening X2′ is one of 80%-100%; The preset standard blowing time t of the first solenoid valve corresponding to the first opening X1 b1 The pre-set standard blowing interval time t is one of 15-25s a1 The preset standard blowing time t of the first solenoid valve corresponding to the second opening X2 and the first opening X1′ is one of 35-45s; b2 The pre-set standard blowing interval time t is between 35 and 45 seconds. a2 One of 15-25s.

9. The method for controlling the air blowing operation of the squeezing roller of a cleaning machine according to claim 7 or 8, characterized in that: The opening threshold T of each second electromagnetic corresponding to each part of the side panel b1 is 1000h, the opening threshold T b2 is 2000h, the opening threshold T b3 4000h; The first opening X1 is 50%, the second opening X2 is 100%; the third opening X3 is 100%; the first opening X1′ is 50%, the second opening X2′ is 100%; The preset standard blowing time t of the first solenoid valve corresponding to the first opening X1 b1 The preset standard blowing interval time t is 20s. a1 The preset standard blowing time t of the first solenoid valve corresponding to the second opening X2 and the first opening X1′ is 40s; b2 The preset standard blowing interval time t is 40s. a2 is 20s.

10. The method for controlling the air blowing operation of the squeezing roller of the cleaning machine according to claim 1, characterized in that: The plate information is determined by the following steps: The plate information is determined according to a pre-stored plate information mapping table; the plate information mapping table includes: a first electromagnetic valve opening threshold T corresponding to the plate a , each preset blowing area of ​​the squeeze roller corresponding to the sheet, each opening threshold T of each second solenoid valve corresponding to each preset blowing area corresponding to the sheet bi , the opening degrees X of each second solenoid valve corresponding to each preset blowing area corresponding to the plate i , and each opening X i The preset standard blowing interval time t of the corresponding first solenoid valve ai , Pre-set standard blowing time t bi and adjustment coefficient k.

11. The method for controlling the air blowing operation of the squeezing roller of the cleaning machine according to claim 1, characterized in that: The number of the blowing units is 6 to 9, and the squeezing roller is correspondingly divided into 6 to 9 blowing areas in the axial direction of the squeezing roller.

12. A control device for blowing air on a squeezing roller of a cleaning machine, characterized in that: The control device is applied to the controller according to any one of claims 1 to 11, and the control device comprises: The plate information determination module is configured to receive the plate information and determine the preset first solenoid valve opening threshold T corresponding to the plate according to the received plate information. a , the preset blowing areas of the squeeze roller corresponding to the sheet, and the n opening thresholds T of each second solenoid valve corresponding to each preset blowing area corresponding to the sheet bi ; A squeeze roller cumulative working time calculation module, configured to calculate the squeeze roller cumulative working time T; The first electromagnetic valve opening determination module is configured to compare the obtained cumulative working time T of the squeeze roller with the preset first electromagnetic valve opening threshold T corresponding to the plate. a For comparison: If T ≥ T a , then open the first solenoid valve; If T < T a , then keep the first solenoid valve in a closed state; The second solenoid valve opening determination module is configured to determine n opening thresholds T of each second solenoid valve corresponding to each preset blowing area corresponding to the plate. bi The opening threshold T of each second solenoid valve corresponding to each preset blowing area corresponding to the plate is selected b1 , or the opening threshold T bn , or adjacent opening threshold T bi and T b(i+1) , where i≤n-1; i starts from 1 and is taken in ascending order to n-1. The accumulated working time T of the squeeze roller is compared with the opening threshold T of each second solenoid valve corresponding to each preset blowing area corresponding to the sheet. b1 Compare with or with the turn-on threshold T bn Compare, or in turn with the adjacent opening threshold T bi and T b(i+1) Compare, specifically: When i=1, if T<T b1 , then each second solenoid valve corresponding to each preset blowing area corresponding to the plate is kept in a closed state; If T ≥ T b1 , then the accumulated working time T of the squeeze roller is compared with the next opening threshold T b2 Make comparisons; In sequence, the value of i increases by 1 until i reaches n-1, and the cumulative working time T of the squeeze roller is compared with the last opening threshold T bn Compare and obtain the interval where the cumulative working time T of the squeeze roller is located; When 1≤i≤n-1, if T bi ≤T<T b(i+1) , then the opening of the second solenoid valve corresponding to each preset blowing area corresponding to the plate is adjusted to the preset i-th opening X i ; When i=n, if T≥T bn , then the opening of the second solenoid valve corresponding to each preset blowing area corresponding to the plate is adjusted to the preset nth opening X n .

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