Tire bead production method and system

Abstract

The invention provides a tire bead production method and system. The tire bead production method comprises the steps that production parameters are set based on the specification of a to-be-produced tire bead; detecting the weight of a tire bead at a preset position; calculating a difference value between the tire bead weight and a preset weight, and judging whether the difference value between the tire bead weight and the preset weight exceeds a preset threshold value or not; and if the difference value between the tire bead weight and the preset weight exceeds a preset threshold value, the production parameters are adjusted based on the difference value between the tire bead weight and the preset weight. According to the tire bead production method, the technical problem that the size of the tire bead produced in the related technology is unstable is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of tire bead production, and in particular to a tire bead production method and system. Background Art

[0002] The current tire bead production equipment is a horizontal laminating machine. Currently, the horizontal laminating machines all use manual parameter adjustment and cannot achieve data linkage in multiple production links. In a certain production link, when the parameters of the production equipment are abnormal, they cannot be revised autonomously, resulting in equipment shutdown, causing serious fluctuations in tire bead weight and affecting tire bead size, resulting in defective products, increasing production costs, and affecting production efficiency.

[0003] Therefore, the prior art needs to be further developed. Summary of the invention

[0004] The purpose of the present invention is to overcome the above technical deficiencies and provide a tire bead production method and system to solve the technical problem of unstable tire bead size produced in the related art.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: a tire bead production method and system are provided, including: setting production parameters based on the specifications of the tire bead to be produced; detecting the tire bead weight at a preset position; calculating the difference between the tire bead weight and the preset weight, and determining whether the difference between the tire bead weight and the preset weight exceeds a preset threshold; if the difference between the tire bead weight and the preset weight exceeds the preset threshold, adjusting the production parameters based on the difference between the tire bead weight and the preset weight.

[0006] Furthermore, the production parameters include: extruder speed ratio, traction roller speed ratio, floating roller counterweight position, storage material pressure and linkage line speed.

[0007] Furthermore, the method for setting production parameters based on the specifications of the tire bead to be produced includes: determining the weight of the corresponding single-circle rubber strip based on the specifications of the tire bead to be produced; determining the glue spitting amount and the single-circle production time according to the current extruder model; and obtaining the extruder speed ratio corresponding to the specifications of the tire bead to be produced based on the correspondence between the extruder speed ratio and the single-circle rubber strip weight, glue spitting amount and single-circle production time.

[0008] Furthermore, the corresponding relationship between the extruder speed ratio and the weight of a single-turn rubber strip, the glue dispensing amount, and the single-turn production time is: extruder speed ratio = single-turn rubber strip weight / glue dispensing amount / single-turn production time × 100.

[0009] Furthermore, the method for setting production parameters based on the specifications of the tire bead to be produced includes: conducting a DOE experiment on the floating roller counterweight position and the stockpile pressure; analyzing the results of the DOE experiment to obtain the relationship between the floating roller counterweight position and the tire bead weight and the relationship between the stockpile pressure and the tire bead weight; obtaining the corresponding tire bead weight based on the specifications of the tire bead to be produced; and selecting the floating roller counterweight position and the stockpile pressure corresponding to the specifications of the tire bead to be produced according to the tire bead weight, the relationship between the floating roller counterweight position and the tire bead weight, and the relationship between the stockpile pressure and the tire bead weight.

[0010] Furthermore, the tire bead production method also includes: detecting the position of the storage rack in real time; when the storage rack reaches a first preset position, reducing the linkage line speed; when the storage rack reaches a second preset position, increasing the linkage line speed.

[0011] Furthermore, the method for adjusting production parameters based on the difference between the tire bead weight and the preset weight includes: selecting a traction roller speed ratio corresponding to the specifications of the tire bead to be produced from a preset database; if the difference between the tire bead weight and the preset weight exceeds a preset threshold, adjusting the traction roller speed ratio according to the difference between the tire bead weight and the preset weight.

[0012] Furthermore, the tire bead production method also includes: if the rubber strip extruded by the extruder is detected in real time at a preset distance before cutting to see if there is any abnormality; if it is detected that the rubber strip has a stop mark, the extruder is controlled to stop and an abnormality warning is issued.

[0013] A tire bead production device includes: a parameter setting unit, which is used to set production parameters based on tire bead specifications; a detection unit, which is used to detect tire bead weight at a preset position; a calculation unit, which is used to calculate the difference between the tire bead weight and a preset weight, and determine whether the difference between the tire bead weight and the preset weight exceeds a preset threshold; and an adjustment unit, which is used to adjust the production parameters based on the difference between the tire bead weight and the preset weight.

[0014] A computer-readable storage medium stores computer-readable instructions, which implement various steps of a tire bead production method when executed by a processor.

[0015] Beneficial effects:

[0016] 1. The tire bead production method of the present invention monitors the tire bead weight, performs parameterized automatic control on each equipment control point according to the performance of different rubber materials and different tire bead size differences, and enables each equipment to be automatically adjusted, thereby achieving the effect of improving the stability of the output tire bead weight.

[0017] 2. The tire bead production method of the present invention automatically alarms and prompts the defective parts produced when the equipment is abnormal, thereby avoiding unqualified tire bead produced due to rubber strip stop marks and improving the production yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a flow chart of a tire bead production method used in an embodiment of the present invention;

[0019] Figure 2 Schematic diagram of the structure of the tire bead production system used in the embodiment of the present invention;

[0020] Figure 3 is a tire bead weight residual diagram used in an embodiment of the present invention;

[0021] Figure 4 is a Pareto diagram of the standardized effect adopted in the embodiment of the present invention;

[0022] Figure 5 is a contour diagram of tire bead weight, counterweight position, and storage material pressure used in an embodiment of the present invention;

[0023] Figure 6 It is a schematic diagram of the optimization of the response of the counterweight position and the material storage position provided in an embodiment of the present invention.

[0024] The above drawings include the following reference numerals:

[0025] 1. Parameter setting unit; 2. Detection unit; 3. Calculation unit; 4. Adjustment unit. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0027] According to an embodiment of the present invention, a tire bead production method is provided. Figures 1 to 6 ,include:

[0028] S100 sets production parameters based on the specifications of the tire bead to be produced;

[0029] S200 detects tire bead weight at a preset position;

[0030] S300 calculates the difference between the tire bead weight and the preset weight, and determines whether the difference between the tire bead weight and the preset weight exceeds a preset threshold;

[0031] S400: If the difference between the tire bead weight and the preset weight exceeds a preset threshold, adjusting the production parameters based on the difference between the tire bead weight and the preset weight.

[0032] In specific practice, standard production parameters are selected from a preset database based on the specifications of the tire bead to be produced, and the production equipment is set according to the standard production parameters. At the same time, the weight of the tire bead after bonding is detected in real time, and the weight after the tire bead is bonded is compared with the preset weight to monitor whether there are any abnormalities in the tire bead production process. At the same time, the production parameters can be automatically adjusted according to the difference between the weight after the tire bead is bonded and the preset weight, so that the weight of the tire bead produced subsequently meets the standard, thereby achieving the effect of real-time detection of the tire bead production size and real-time adjustment of the tire bead production size, and solving the technical problem of unstable tire bead size produced in related technologies.

[0033] In the tire bead production method of this embodiment, the production parameters include: extruder speed ratio, traction roller speed ratio, floating roller counterweight position, storage pressure and linkage line speed.

[0034] Specifically, the equipment factors that affect the tire bead weight mainly include the extruder speed ratio, the traction roller speed ratio, the floating roller counterweight position, the storage pressure and the linkage line speed. Among them, the extruder speed is negatively correlated with the tire bead weight. The faster the extruder speed, the lighter the tire bead weight.

[0035] In the tire bead production method of this embodiment, the method of setting production parameters based on the specifications of the tire bead to be produced includes:

[0036] Determine the weight of the corresponding single-ring rubber strip based on the specifications of the tire bead to be produced;

[0037] Determine the glue dispensing amount and single-turn production time according to the current extruder model;

[0038] Based on the corresponding relationship between the extruder speed ratio and the weight of a single-turn rubber strip, the glue dispensing amount, and the single-turn production time, the extruder speed ratio corresponding to the specifications of the tire bead to be produced is obtained.

[0039] In this way, the weight of a corresponding single-turn rubber strip can be determined by the specifications of the tire bead to be produced, and the current extruder's glue discharge volume and single-turn production time can be retrieved from the preset database to obtain the standard extruder speed ratio corresponding to the tire bead to be produced, thereby realizing the automated production of the tire bead.

[0040] In the tire bead production method of this embodiment, the corresponding relationship between the extruder speed ratio and the single-circle rubber strip weight, glue discharge amount and single-circle production time is: extruder speed ratio = single-circle rubber strip weight ÷ glue discharge amount ÷ single-circle production time × 100.

[0041] In specific practice, it is first necessary to measure the glue spitting amount of the extruder, or retrieve the glue spitting amount data from the preset database according to the extruder model, and then calculate the single-circle production time according to the machine production inch level. Finally, calculate the extruder speed ratio corresponding to the specifications of the tire bead to be produced according to the extruder speed ratio calculation formula written into the PLC: Extruder speed ratio = single-circle rubber strip weight ÷ glue spitting amount ÷ single-circle production time × 100.

[0042] In the tire bead production method of the present embodiment, the method for setting production parameters based on the specifications of the tire bead to be produced includes: performing a DOE experiment on the floating roller counterweight position and the stock pressure; analyzing the results of the DOE experiment to obtain the relationship between the floating roller counterweight position and the tire bead weight and the relationship between the stock pressure and the tire bead weight; obtaining the corresponding tire bead weight based on the specifications of the tire bead to be produced; and selecting the floating roller counterweight position and the stock pressure corresponding to the specifications of the tire bead to be produced according to the tire bead weight, the relationship between the floating roller counterweight position and the tire bead weight, and the relationship between the stock pressure and the tire bead weight.

[0043] Specifically, the dancer roller counterweight position refers to the position of the counterweight on the dancer roller.

[0044] Embodiment 1:

[0045] Taking the completion of a certain type of tire bead as an example, first, a DOE test is conducted using two factors, namely, the floating roller counterweight position (hereinafter referred to as the counterweight position) and the stock pressure, and two levels (i.e., low level and high level). The profiling is performed twice, two center points are added, and the high and low levels of the factors are selected as follows:

[0046] Key Factors Low level High level Counterweight position / mm 80 130 Storage pressure / MPa 0.2 0.3

[0047] Then, perform data collection SOP and MSA analysis on the above data:

[0048]

[0049]

[0050] The tire bead weight results are as follows:

[0051] Run sequence Center Point Block Storage pressure Counterweight position Bead weight 1 1 1 0.20 130 0.359 2 1 1 0.30 130 0.346 3 1 1 0.20 90 0.330 4 0 1 0.25 110 0.334 5 1 1 0.30 130 0.345 6 1 1 0.20 90 0.331 7 1 1 0.30 90 0.325 8 0 1 0.25 110 0.334 9 1 1 0.30 90 0.324 10 1 1 0.20 130 0.360

[0052] See also Figure 3 In the residual graph of tire bead weight, there is no obvious misfit in the normal probability graph, and the data is not extremely skewed in the histogram, and the residuals are normal; in the fitted value graph, the data is scattered and does not show a specific pattern, and the residuals are equal variance; in the order, it is basically symmetrical above and below the straight line of 0.00, and the residuals are independent.

[0053] Further, see Figure 4, the DOE factors are analyzed, where the fitting factors are tire bead weight, stock pressure, and counterweight position. It can be obtained that when the stock pressure P value = 0.003 < 0.05, the influence is significant; the counterweight position P value = 0.000 < 0.05, the interaction is significant; the bending corresponding P value = 0.000 < 0.05, it is necessary to further find the surface.

[0054] Further, see Figure 5 ,Analysis of the DOE contour diagram shows that when the counterweight position is between 115-122mm and the storage pressure is 0.2Mpa, the tire bead weight is closest to the standard value.

[0055] Furthermore, the above results are subjected to response optimization, wherein the response optimization parameters are:

[0056]

[0057] See also Figure 6 It can be obtained that when the predicted tire bead weight standard value is 0.359, the optimal setting of the counterweight position is 120.974mm and the storage pressure is 0.2Mpa; the prediction interval is (0.351085, 0.362828).

[0058] Finally, the process capability of the tire bead weight under the conditions of a counterweight position of 120.974mm and a stock pressure of 0.2Mpa was verified. The conclusion was that the average tire bead weight was within the prediction interval (0.351085, 0.36767) when the counterweight position was 120.974mm and the stock pressure was 0.2Mpa. Therefore, the optimal factor level was set as a counterweight position of 120.974mm and a stock pressure of 0.2Mpa.

[0059] In specific practice, the tire bead production method also includes automatic adjustment of the storage pressure, wherein the storage pressure is the spreading pressure of the upper and lower rows of wheels of the storage rack.

[0060] Specifically, when the tire bead is produced, the apex is wound on the stocker. The greater the stocking pressure, the longer the apex is stretched. When the stocking pressure reaches the minimum value, the apex on the stocker is in an expanded state. In this embodiment, the stocker pressure reducing valve is replaced with a proportional valve, and the initial stocking pressure is set to 0.2Mpa through the PLC program to ensure that the stocker can expand the apex normally. At the same time, in order to ensure that the apex will not fall off when it is wound on the stocker, the stocking pressure is automatically reduced to 0.12Mpa when the lower limit of the stocking is reached. When the stocker is lifted, the extruder is triggered to start the photoelectric, and the stocking pressure is increased to 0.2Mpa again.

[0061] In the tire bead production method of the present embodiment, the tire bead production method further includes: real-time detection of the position of the storage rack; when the storage rack reaches a first preset position, reducing the linkage line speed; when the storage rack reaches a second preset position, increasing the linkage line speed.

[0062] Specifically, photoelectric sensors are provided at both the first preset position and the second preset position. When the photoelectric sensor at the first preset position detects the storage rack, the linkage line speed is reduced; when the photoelectric sensor at the second preset position detects the storage rack, the linkage line speed is increased.

[0063] Embodiment 2:

[0064] When the photoelectric sensor at the second preset position detects the storage rack, the linkage line speed is increased to 3000; when the photoelectric sensor at the first preset position detects the storage rack, the speed is reduced to 2500 and the delayed extruder stops.

[0065] In the tire bead production method of the present embodiment, the method for adjusting production parameters based on the difference between the tire bead weight and the preset weight includes: selecting a traction roller speed ratio corresponding to the specifications of the tire bead to be produced from a preset database; if the difference between the tire bead weight and the preset weight exceeds a preset threshold, adjusting the traction roller speed ratio according to the difference between the tire bead weight and the preset weight.

[0066] Specifically, the basic value of the traction roller speed ratio corresponding to the specification of the tire bead to be produced is obtained through actual measurement statistics or by retrieving it from a preset database, the tire bead weight is measured by real-time weighing, and the tire bead weight is compared with the preset weight. If the preset weight is exceeded, the traction roller speed ratio is automatically adjusted.

[0067] Specifically, the preset weight is the standard weight of the tire bead to be produced after the tire bead is fitted.

[0068] Embodiment three:

[0069] In this embodiment, if the load exceeds the standard by 3g, the traction roller speed ratio is increased by 1%, and if the load exceeds the standard by 3g, the traction roller speed ratio is reduced by 1%. The traction roller speed ratio is increased or decreased in the same proportion according to the actual measured value.

[0070] In the tire bead production method of this embodiment, the tire bead production method further includes:

[0071] If the rubber strip extruded by the extruder is detected in real time at a preset distance before cutting to see if there is any abnormality;

[0072] If it is detected that the rubber strip has a parking mark, the extruder is controlled to stop and an abnormal warning is issued.

[0073] In specific practice, the elongation rate of the apex rubber at the joint of the drum and disc is measured and calculated; the length of the apex rubber under the limit state of the storage rack from the extruder to before cutting is measured; when the stop mark is two circles before cutting, if the stop mark is detected, the sound, light and pop-up window will alarm at the same time after 20S, and the alarm will stop automatically.

[0074] Embodiment 4:

[0075] Taking the example of 5 turns of apex rubber wrapped around the cooling roller, the PLC writes the formula: the length of the linkage line is 37.1m÷(single-turn apex rubber length×0.9)-2; when the parking mark is in the first two turns of cutting, if the parking mark is detected, an audible and visual alarm and a pop-up alarm prompt will be issued, among which the pop-up alarm prompt can be switched between Chinese and Cambodian.

[0076] This embodiment provides a tire bead production device, see Figure 2 , tire bead production equipment includes:

[0077] A parameter setting unit 1, the parameter setting unit 1 is used to set production parameters based on tire bead specifications;

[0078] A detection unit 2, the detection unit 2 is used to detect the tire bead weight at a preset position;

[0079] The calculation unit 3 is used to calculate the difference between the tire bead weight and the preset weight, and determine whether the difference between the tire bead weight and the preset weight exceeds a preset threshold;

[0080] The adjusting unit 4 is used to adjust the production parameters based on the difference between the tire bead weight and the preset weight.

[0081] With the above settings, standard production parameters are selected from a preset database based on the specifications of the tire bead to be produced, and the production equipment is set according to the standard production parameters. At the same time, the weight of the tire bead after bonding is detected in real time, and the weight after the tire bead is bonded is compared with the preset weight to monitor whether there are abnormalities in the tire bead production process. At the same time, the production parameters can be automatically adjusted according to the difference between the weight after the tire bead is bonded and the preset weight, so that the weight of the tire bead produced subsequently meets the standard, thereby achieving the effect of real-time detection of the tire bead production size and real-time adjustment of the tire bead production size, and solving the technical problem of unstable tire bead size produced in related technologies.

[0082] This embodiment provides a computer-readable storage medium, on which computer-readable instructions are stored. When the computer-readable instructions are executed by a processor, each step of the tire bead production method described above is implemented.

[0083] Embodiment five:

[0084] This embodiment provides a tire bead production method, comprising:

[0085] 1. Automatic transmission of the extruder speed ratio: The extruder parameters are set according to the specifications of the tire bead to be produced. The apex rubber at the storage rack is continuously and stably stored in the middle, which ensures production efficiency without causing frequent shutdowns and resulting in fluctuations in product size.

[0086] 2. Automatic adjustment of the traction roller speed ratio: The traction roller speed ratio parameter is set according to the tire bead weight corresponding to the tire bead to be produced, and is automatically adjusted through the feedback of the automatic weighing result of the tire bead weight to ensure that the tire bead weight is at the standard value.

[0087] 3. Floating roller counterweight position and storage pressure: DOE experiment is carried out on the floating roller counterweight position and storage pressure. The counterweight position is fixed, the optimal storage pressure is selected, and the storage pressure is automatically reduced when the equipment stops. When the equipment stops, the apex rubber on the storage rack is subjected to the minimum force, reducing the stretching.

[0088] 4. Linkage line speed: Set the reference value according to the specifications of the tire bead to be produced, and modify the equipment to set two sets of proximity switches to achieve automatic speed increase and decrease of the linkage line. At the same time, the linkage line automatically slows down when handling abnormalities, prolonging the extruder stop time and reducing the frequency of extruder stops.

[0089] 6. Automatic alarm for parking marks: When the equipment is abnormal, the parking marks caused by the extruder stopping need to be eliminated. The bad ones will be alarmed through calculation, MES parameter transmission and PLC control.

[0090] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0091] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0092] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0093] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0094] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A tire bead production method, characterized in that: include: Setting production parameters based on the specifications of the tire bead to be produced; Detect tire bead weight at preset positions; Calculating the difference between the tire bead weight and a preset weight, and determining whether the difference between the tire bead weight and the preset weight exceeds a preset threshold; If the difference between the tire bead weight and the preset weight exceeds a preset threshold, the production parameter is adjusted based on the difference between the tire bead weight and the preset weight.

2. The tire bead production method according to claim 1, characterized in that: The production parameters include: extruder speed ratio, traction roller speed ratio, floating roller counterweight position, storage material pressure and linkage line speed.

3. The tire bead production method according to claim 2, characterized in that: The method for setting production parameters based on the specifications of the tire bead to be produced comprises: Determining the weight of the corresponding single-ring rubber strip based on the specifications of the tire bead to be produced; Determine the glue dispensing amount and single-turn production time according to the current extruder model; Based on the corresponding relationship between the extruder speed ratio and the weight of the single-turn rubber strip, the glue dispensing amount and the single-turn production time, the extruder speed ratio corresponding to the specification of the tire bead to be produced is obtained.

4. The tire bead production method according to claim 3, characterized in that: The corresponding relationship between the extruder speed ratio, the weight of the single-turn rubber strip, the glue discharge amount and the single-turn production time is: Extruder speed ratio = single-turn rubber strip weight ÷ glue discharge volume ÷ single-turn production time × 100.

5. The tire bead production method according to claim 2, characterized in that: The method for setting production parameters based on the specifications of the tire bead to be produced comprises: Conducting DOE experiment on the floating roller counterweight position and the material storage pressure; Analyze the results of the DOE experiment to obtain the relationship between the floating roller counterweight position and the tire bead weight and the relationship between the storage material pressure and the tire bead weight; Obtaining the corresponding tire bead weight based on the specifications of the tire bead to be produced; The floating roller counterweight position and the storage pressure corresponding to the specifications of the tire bead to be produced are selected according to the tire bead weight, the relationship between the floating roller counterweight position and the tire bead weight, and the relationship between the storage pressure and the tire bead weight.

6. The tire bead production method according to claim 2, characterized in that: The tire bead production method also includes: Real-time detection of the position of the storage rack; When the material storage rack reaches the first preset position, reducing the linkage line speed; When the material storage rack reaches the second preset position, the linkage line speed is increased.

7. The tire bead production method according to claim 2, characterized in that: The method for adjusting the production parameters based on the difference between the tire bead weight and the preset weight includes: Selecting a traction roller speed ratio corresponding to the specification of the tire bead to be produced from a preset database; If the difference between the tire bead weight and the preset weight exceeds a preset threshold, the traction roller speed ratio is adjusted according to the difference between the tire bead weight and the preset weight.

8. The tire bead production method according to claim 1, characterized in that: The tire bead production method also includes: If the rubber strip extruded by the extruder is detected in real time at a preset distance before cutting to see if there is any abnormality; If it is detected that the rubber strip has a stop mark, the extruder is controlled to stop and an abnormal warning is issued.

9. A tire bead production system, characterized in that: The tire bead production equipment system: A parameter setting unit, the parameter setting unit is used to set production parameters based on tire bead specifications; A detection unit, the detection unit is used to detect the tire bead weight at a preset position; a calculation unit, the calculation unit being used to calculate a difference between the tire bead weight and a preset weight, and to determine whether the difference between the tire bead weight and the preset weight exceeds a preset threshold; An adjusting unit is used to adjust the production parameters based on the difference between the tire bead weight and a preset weight.

10. A computer-readable storage medium having computer-readable instructions stored thereon, characterized in that: When the computer-readable instructions are executed by a processor, the various steps of the tire bead production method according to any one of claims 1 to 8 are implemented.

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