CN112013795A - Method for confirming alignment of tire building crown assembly and tire cylinder assembly and application - Google Patents
Method for confirming alignment of tire building crown assembly and tire cylinder assembly and application Download PDFInfo
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- CN112013795A CN112013795A CN202010856190.2A CN202010856190A CN112013795A CN 112013795 A CN112013795 A CN 112013795A CN 202010856190 A CN202010856190 A CN 202010856190A CN 112013795 A CN112013795 A CN 112013795A
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- tire
- assembly
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B11/27—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
- G01B11/272—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes using photoelectric detection means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D30/10—Building tyres on round cores, i.e. the shape of the core is approximately identical with the shape of the completed tyre
- B29D30/16—Applying the layers; Guiding or stretching the layers during application
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
- B29D30/30—Applying the layers; Guiding or stretching the layers during application
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tyre Moulding (AREA)
Abstract
The invention discloses a method for confirming the alignment of a tire molding crown assembly and a tire cylinder assembly and application thereof, wherein the crown assembly is an assembly of a belt ply, a crown band and a tire surface, the tire cylinder assembly is an assembly of an inner liner, a tire body cord fabric, a tire bead and a tire side, the center part of the tire surface is provided with a tire surface center line, a tire molding device is provided with a center light mark, the center light mark marks the center position of the tire surface to form a center light mark line, and the method for confirming the alignment of the tire molding crown assembly and the tire cylinder assembly comprises the following steps: the distance deviation between the tread center line and the center lamp mark line under two conditions is respectively measured through the front sleeve tire blank and the back sleeve tire blank on the tire forming equipment, and the centering deviation amount of the tire crown assembly and the tire cylinder assembly is calculated and solved based on the distance deviation. The method simply and effectively identifies the centering deviation and the central light mark line deviation of the tire crown assembly and the tire cylinder assembly, and takes preventive measures when abnormality is found, thereby improving the quality of the tire and the satisfaction degree of customers.
Description
Technical Field
The invention belongs to the technical field of tire building, and particularly relates to a method for confirming the centering of a tire crown assembly and a tire cylinder assembly for tire building and application thereof.
Background
The tire building engineering is a process of combining the tire semi-finished products produced by the material engineering. The application of the materials must follow the principle of symmetry, as shown in fig. 1, the centering combination of the crown and the drum assemblies being one of the key control points of the forming process, the points of influence being: the crown position of the transfer ring, the neutral setting drum pair, the rubber ring of the setting drum and the like. If the material is attached asymmetrically, the taper effect stress of the tire can be caused, and the service life, the oil consumption, the maneuverability of an automobile and the like of the tire are seriously influenced.
The traditional method adopts a mode of directly and positively sleeving a tire blank to measure the deviation of a central light mark line and a tread central line, but does not represent the deviation of a crown assembly and a tire cylinder assembly, and the central light mark line and the tread central line are possibly centered only because the central light mark line is inclined to cause the measurement deviation. Meanwhile, the traditional method has very high requirements on the precision of the optical mark line in the center of the equipment and the symmetry precision of the shaping drum, is difficult to control in actual work, and is difficult to find when abnormal conditions are found. The method is established on the premise that the verticality and the symmetry of the center light mark are not problematic, and if the precision of the center light mark line factor is deviated, an operator cannot correctly judge how neutral the crown assembly and the tire cylinder assembly are, so that great risks are caused to the tire quality.
Therefore, the conventional methods are still in need of further development and improvement.
Disclosure of Invention
Aiming at various defects in the prior art and aiming at solving the problems, a method for confirming the alignment of a tire molding crown assembly and a tire cylinder assembly and application thereof are provided, the deviation of the tire crown assembly and the tire cylinder assembly and the deviation of a central light mark line are simply and effectively identified, and a preventive measure is taken when abnormality is found in time, so that the quality of a tire is improved, and the satisfaction degree of customers is improved.
In order to achieve the purpose, the invention provides the following technical scheme:
the method for confirming the alignment of the tire molding crown assembly and the tire cylinder assembly comprises the following steps of: the distance deviation between the tread center line and the center lamp mark line under two conditions is respectively measured through the front sleeve tire blank and the back sleeve tire blank on the tire forming equipment, and the centering deviation amount of the tire crown assembly and the tire cylinder assembly is calculated and solved based on the distance deviation.
Further, the method for confirming the neutrality of the tire building crown assembly and the tire cylinder assembly specifically comprises the following steps:
s1, identifying the tread centerline in alignment with the center light alignment in the tire building apparatus at the tread application position and labeled A1.
And S2, setting the tire blank in a correct position in the tire forming equipment, and recording the distance deviation a of the tread center line at the position A1 relative to the center lamp marking line.
And S3, shaping the tire blank in a shaping position in the tire shaping equipment, and recording the distance deviation b of the tread center line at the position A1 relative to the center lamp marking line.
S4, calculating the amount of centring deviation of the crown pack from the barrel pack through the distance deviations a, b obtained in steps S2 and S3.
Further, the tread center line is marked as a positive value on the right side of the center light mark line, and the tread center line is marked as a negative value on the left side of the center light mark line.
Further, the crown assembly and the barrel assembly are offset by a neutral deviation of (a-b)/2.
Further, the deviation amount of the reticle line at the center of the fixed position is ((a-b)/2) -a.
Preferably, when the tire blanks are sleeved positively and reversely in the tire molding equipment, a steel plate ruler is adopted for measuring the distance deviation, and the precision of the steel plate ruler is 0.5 mm.
Further, when the tire blank is sleeved positively or reversely in the tire forming equipment, the tire blank state is shaping and inflating, and the state when the tire crown is pressed is simulated.
Use of a tyre building crown pack and a tyre drum pack for a method of centrality verification, wherein the mechanical position of a tyre building apparatus is adjusted according to the amount of centrality deviation of the crown pack from the tyre drum pack, the amount of adjustment being the amount of centrality deviation of the crown pack from the tyre drum pack.
Advantageous effects
The method for confirming the centering of the tire molding crown assembly and the tire cylinder assembly and the application thereof provided by the invention can confirm the centering deviation amount of the tire crown assembly and the tire cylinder assembly, can confirm the centering of the central light mark line of the equipment, simply and effectively identify the deviation of the tire crown assembly and the tire cylinder assembly and the deviation of the central light mark line, and take preventive measures when abnormal conditions are found in time, thereby improving the quality of the tire and improving the satisfaction degree of customers.
Drawings
FIG. 1 is a view of the crown assembly and tire drum assembly of the present invention in combination;
fig. 2 is a schematic view of the tire building crown package and tire drum package centering confirmation method step S1 according to embodiment 1 of the present invention;
fig. 3 is a schematic representation of the method step S2 corresponding to the method step of confirming the neutrality of the tire building crown assembly and the tire drum assembly in the embodiment 1 of the present invention;
fig. 4 is a schematic representation of the method step S3 corresponding to the method step of confirming the neutrality of the tire building crown assembly and the tire drum assembly in the embodiment 1 of the present invention;
FIG. 5 is a graph of performance testing data for a process for improving the front tire taper effect force in accordance with example 1 of the present invention;
FIG. 6 is a graph of process capability test data for improving the post-tire taper effect force in example 1 of the present invention.
In the drawings: 100-crown assembly, 110-tread centerline, 200-tube assembly, 300-center light gauge.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following description is given for clear and complete description of the technical solution of the present invention with reference to the embodiments of the present invention, and other similar embodiments obtained by those skilled in the art without creative efforts based on the embodiments of the present application shall fall within the protection scope of the present application. In addition, directional terms such as "upper", "lower", "left", "right", etc. in the following embodiments are directions with reference to the drawings only, and thus, the directional terms are used for illustrating the present invention and not for limiting the present invention.
Detailed description of the preferred embodiment 1
This example further illustrates the present invention by taking a semi-steel radial tire as an example.
A method for confirming the alignment of a tire molding crown assembly 100 and a tire cylinder assembly 200 is disclosed, as shown in FIG. 1, the crown assembly 100 is an assembly of a belt layer, a crown strip and a tire tread 110, the tire cylinder assembly 200 is an assembly of an inner liner, a tire body cord fabric, a tire bead and a tire side, the crown assembly 100 is sleeved on the tire cylinder assembly 200 through a transmission pipe on a tire molding device, a tire tread central line 111 is arranged at the center part of the tire tread 110, a center light mark for positioning and marking the position of the tire tread central line 111 is arranged on the tire molding device, and the center light mark marks the center position of the tire tread 110 to form a center light mark line 300.
Further, the method of confirming the neutrality of the tire building crown assembly 100 and the tire drum assembly 200 comprises the steps of: the distance deviation between the tread central line 111 and the central lamp mark line 300 is measured respectively in two cases by the front-sleeve tire blank and the back-sleeve tire blank on the tire forming equipment, and the centering deviation amount of the crown assembly 100 and the tire cylinder assembly 200 is calculated based on the distance deviation.
Further, the method for confirming the neutrality of the tire building crown assembly 100 and the tire cylinder assembly 200 specifically comprises the following steps:
s1, as shown in FIG. 2, the tread 110 application position in the tire building apparatus confirms the alignment of the tread centerline 111 with the center light marker 300 and is labeled A1;
s2, as shown in figure 3, the tire blank is aligned at the shaping position in the tire shaping equipment, and the position deviation a of the tread center line at A1 relative to the center light marking is recorded;
s3, as shown in fig. 4, the tire blank is reversed in position and the positional deviation b of the tread centerline from the center light mark line at the position a1 is recorded.
S4, calculating the amount of centering deviation of the crown pack 100 and the tube pack 200 from the distance deviations a, b obtained in steps S2 and S3.
Specifically, the shaping position and the tread 110 attaching position are mechanically positioned by electromagnets.
Further, the tread centerline 111 is reported as positive values to the right of the center light 300, and the tread centerline 111 is reported as negative values to the left of the center light 300.
Further, the crown assembly 100 and the barrel assembly 200 are offset by a neutral deviation of (a-b)/2.
Further, the deviation amount of the reticle line at the center of the fixed position is ((a-b)/2) -a.
Preferably, when the tire blanks are sleeved positively and reversely in the tire molding equipment, a steel plate ruler is adopted for measuring the distance deviation, and the precision of the steel plate ruler is 0.5 mm.
Further, when the tire blank is sleeved positively or reversely in the tire forming equipment, the tire blank state is shaping and inflating, and the state when the tire crown is pressed is simulated.
An application of a tire building crown assembly 100 and a tire drum assembly 200 to a method of centering validation, wherein the mechanical position of the tire building apparatus is adjusted according to the amount of centering deviation of the crown assembly 100 and the tire drum assembly 200, the amount of adjustment being the amount of centering deviation of the crown assembly 100 and the tire drum assembly 200.
Taking a tire with the model number of 175/70R14(R refers to a radial tire, 175 refers to a tire width of 175 inches, 70 refers to the ratio of the tire height to the tire width multiplied by 100%, and 14 refers to a tire inner opening diameter of 14 inches) as an example, the taper effect stress of the tire is detected by a PCR uniformity detector, the obtained taper effect stress detection data is used for calculating the process capability by software such as minitab, and the like, wherein USL refers to the upper specification limit, and LSL refers to the lower specification limit.
As shown in fig. 5, before improvement, the average value of the taper effect stress of the tire is 38.5N, the standard-60N is less than or equal to the taper effect stress of 60N, and the process capability index Cpk is 0.55.
During the tire building process, the method of the invention is adopted to test the neutral deviation amount of the crown assembly 100 and the tire cylinder assembly 200, and the finally obtained tire performance is tested for the taper stress effect, specifically as follows:
the crown assembly 100 and the barrel assembly 200 are verified for neutrality by the method: during the formation of this specification, the crown pack 100 is centered (0mm offset) with the center light. Confirming the eccentricity of the crown combined key by a positive and negative sleeving method: when the tire blank is sleeved positively, the distance deviation a between the tread center line 111 of the crown assembly 100 and the center light mark line 300 is 0mm, and when the tire blank is sleeved negatively, the distance deviation b between the tread center line 111 of the crown assembly 100 and the center light mark line 300 is-1 mm. The centering deviation of the crown pack 100 from the barrel pack 200 was calculated as (a-b)/2- (0mm- (-1 mm))/2-0.5 mm, and the set position center light marker 300 deviation ((a-b)/2) -a-0.5 mm.
The tire building equipment is provided with a transfer ring for clamping the crown assembly 100, and a standard gasket of 0.5mm is added at the bottom of the transfer ring of the tire building equipment according to the centering deviation amount of the tire assembly and the tire cylinder assembly 200 so as to correct the centering of the combination of the crown assembly 100 and the tire cylinder assembly 200.
And (4) re-correcting the verticality and the centering degree of the center light mark of the tire building equipment according to the deviation amount of the center light mark line 300 at the set position.
As shown in fig. 6, by adopting the method for confirming the alignment of the crown assembly 100 and the tire cylinder assembly 200 according to the present invention, and adjusting the mechanical position of the tire building equipment in time according to the alignment deviation amount of the crown assembly 100 and the tire cylinder assembly 200 and the deviation amount of the center light mark line 300 of the setting position, then the molding of the crown assembly 100 and the tire cylinder assembly 200 is performed, compared with the taper effect stress before improvement, the average value of the improved 175/70R14 taper effect stress is reduced from 38.5N to 12.8N, the improvement range is 25.7N, and further the stability of straight line driving can be improved, the Cpk value of the process capability index is improved from 0.55 to 1.51, and the quality of the tire is effectively improved.
The present invention has been described in detail, and it should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Claims (8)
1. The method for confirming the alignment of the tire molding crown assembly and the tire cylinder assembly is characterized by comprising the following steps of: the distance deviation between the tread center line and the center lamp mark line under two conditions is respectively measured through the front sleeve tire blank and the back sleeve tire blank on the tire forming equipment, and the centering deviation amount of the tire crown assembly and the tire cylinder assembly is calculated and solved based on the distance deviation.
2. The method of claim 1, wherein the method of validating the neutrality of a tire building crown assembly and a tire drum assembly specifically comprises the steps of:
s1, confirming the alignment position of the tread center line and the center lamp mark line at the tire surface fitting position in the tire molding equipment, and marking as A1;
s2, setting a tire blank in a shaping position in tire molding equipment, and recording the position deviation a of the tread center line at the A1 position relative to the center lamp marking line;
and S3, shaping the position reverse-sleeved tire blank in the tire forming equipment, and recording the position deviation b of the position tread center line at the A1 relative to the center lamp marked line.
S4, calculating the amount of centring deviation of the crown pack from the barrel pack through the distance deviations a, b obtained in steps S2 and S3.
3. A method of validating the centering of a tire building crown package and tire casing package as claimed in claim 2, wherein said tread centerline is reported as a positive value to the right of the center light line and a negative value to the left of the center light line.
4. A method of validating the centring of a tyre building crown pack and a tyre drum pack according to claim 3, wherein the centring deviation of the crown pack and the tyre drum pack is (a-b)/2.
5. The method of claim 4 wherein the amount of deviation of the shaped position center cursor line is ((a-b)/2) -a.
6. The method of claim 2, wherein the distance deviation is measured using a steel plate ruler with an accuracy of 0.5mm during the process of fitting and removing the tire blanks in the tire building apparatus.
7. The method of claim 2, wherein the tire blank is shaped and inflated to simulate a crown application condition when the tire is applied to a tire building apparatus.
8. Use of a tyre building crown pack and a tyre drum pack for a method of centrality validation characterised in that the mechanical position of the tyre building apparatus is adjusted according to the amount of centrality deviation of the crown pack from the tyre drum pack, the amount of adjustment being the amount of centrality deviation of the crown pack from the tyre drum pack.
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| CN202010856190.2A CN112013795B (en) | 2020-08-24 | 2020-08-24 | Method for confirming alignment of tire building crown assembly and tire cylinder assembly and application |
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| CN202010856190.2A CN112013795B (en) | 2020-08-24 | 2020-08-24 | Method for confirming alignment of tire building crown assembly and tire cylinder assembly and application |
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| CN112013795B CN112013795B (en) | 2022-02-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113390341A (en) * | 2021-06-18 | 2021-09-14 | 赛轮(沈阳)轮胎有限公司 | Automatic detection method and system for tyre body turn-up after tyre blank shaping |
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| CN112013795B (en) | 2022-02-01 |
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