CN111709100A - Vulcanized capsule shape parameter design method - Google Patents
Vulcanized capsule shape parameter design method Download PDFInfo
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- CN111709100A CN111709100A CN202010639799.4A CN202010639799A CN111709100A CN 111709100 A CN111709100 A CN 111709100A CN 202010639799 A CN202010639799 A CN 202010639799A CN 111709100 A CN111709100 A CN 111709100A
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Abstract
The invention discloses a vulcanized capsule contour parameter design method, which is characterized in that the numerical values of the outer diameter of a capsule and the perimeter of the outer contour of the capsule are calculated based on the known size of a capsule clamp and the parameters of a tire to be processed, and then the contour of the capsule is drawn according to the obtained outer diameter of the capsule and the perimeter of the outer contour of the capsule. This scheme designs for the foundation according to the interior profile of tire completely, the interior shape that the vulcanization capsule that uses this design method to prepare can perfect match tire, the capsule that appears in can effectual reduction tire production is wrinkled, bad quality defects such as nest gas, avoid the uncertain factor that traditional empirical value design brought, the tire capsule that adapts to multiple specification model sets up, and the capsule shape specification to same model tire design is unified, the mass production of being convenient for, effectively improve the precision of capsule appearance parameter design, in order to prolong the life of vulcanization capsule.
Description
Technical Field
The invention belongs to the technical field of tire curing bladder preparation methods, and particularly relates to a vulcanized bladder appearance parameter design method.
Background
The overall dimensions of the tire bladder are critical to the efficiency, quality, etc. of the tire. The unreasonable external dimension design easily causes various tire defects. The external dimension is too large, and the defects of capsule pleating, corner clamping and the like are easy to occur after the tire is vulcanized; the external dimension is designed to be too small, and poor air in the tire inner cavity is easy to occur in tire vulcanization. And the proper overall dimension of the curing bladder can effectively prevent the defects. The prior traditional tire curing bladder appearance design mainly depends on the experience of engineers, and the section perimeter and the outer diameter of the bladder are designed according to the specification size. With the vigorous development of the automobile industry, the tire industry develops more and more tire models, and the requirements of modern tire production cannot be met by relying on traditional experience. The traditional tire curing bladder has the phenomena of short service life and high tire failure rate under a new form.
Accordingly, further developments and improvements are still needed in the art.
Disclosure of Invention
In order to solve the above problems, a method for designing the profile parameters of a vulcanized rubber bladder is proposed. The invention provides the following technical scheme:
a vulcanized capsule appearance parameter design method calculates the numerical values of the outer diameter of a capsule and the outer contour perimeter of the capsule based on the known size of a capsule clamp and the parameters of a tire to be processed, and specifically comprises the following steps:
determining the circumferential stretching rate and the radial stretching rate of the capsule, the width of the clamping edge, the inner diameter of the clamping edge and the height of the clamping edge according to the known sizes of the capsule clamps;
determining the outer diameter of the tire, the thickness of a tread, the circumference of the inner contour of the tire, the engagement diameter, the engagement width and the rolling axis of the tire according to known parameters of the tire to be processed;
the formula according to is:
the bladder outer diameter ═ tire inner diameter/radial stretch rate ═ tire outer diameter-2 tread thickness/radial stretch rate;
the outer contour circumference of the bladder is (the inner contour circumference of the tire + the steel ring width + 2)/the circumferential stretching rate is (the inner contour circumference of the tire + the closed diameter-the inner diameter of the clamping edge-2 + the width of the clamping edge)/the circumferential stretching rate;
and drawing the outline of the capsule according to the obtained outer diameter of the capsule and the perimeter of the outline of the capsule.
Further, the circumferential stretch ratio is equal to the radial stretch ratio.
Further, the specific process of drawing the outline of the capsule comprises the following steps:
(1) taking the intersection point of the vertical central line of the tire and the inner contour of the tire as a starting point P0With P0as the center of circle, drawing a circle according to the radius r ═ L ═ alpha, and the intersection point with the inner contour of the tire is P1Then with P1as the center of circle, the radius r is L x alpha, and the intersection point of the radius r and the radius L x alpha and the inner contour of the tire is P2By analogy, P is obtained3、P4…Pnwherein, the circumferential stretching rate and the radial stretching rate are both α, the fixed interval length L on the bladder is set, and the length of the bladder corresponding to the inner contour of the tire after expansion is L x α;
(2) drawing origin L by taking the maximum diameter point of the crown part of the capsule as the outline of the capsule0，L0To P0Distance M ═ 2 (tire inside diameter-bladder outside diameter), expressed as L0Drawing a circle with the radius of L as the center of the circle;
(3) with P1As a starting point, a point D is obtained by vertical projection to the rolling axis of the tire1At this time P1To D1Is moved vertically down by a distance N, D1as the center of circle, drawing a circle according to the radius r being N/α, and intersecting the circle drawn in the previous step at the point L1By analogy, L is obtained2、L3、L4…LnUntil the intersection point between the two circles is not generated any more;
(4) determining the position of the clamping edge according to the radius Db of the clamping edge and the bonding width Wb by taking the rolling axis of the tire as a reference;
(5) determining a capsule crown curve;
(6) adjusting the position of the clamping edge to enable the periphery of the outer contour of the capsule to reach a preset value;
(7) determining capsule thickness distribution;
(8) the capsule edge and the capsule crown curve are connected by a smooth curve to form the appearance structure of the capsule.
Further, the fixed interval length L on the capsule is set to 10 mm.
Further, the method for determining the position of the clamping edge according to the clamping edge radius Db and the bonding width Wb comprises the following steps: drawing a horizontal line at a position which is half of the inner diameter Db of the clamping edge, intersecting the horizontal line with the center line of the tire at a point O, taking an end point W at a position which takes the point O as a starting point and has an outward distance of 1.5 times of the closing width Wb along the horizontal line, taking the point W as an edge position of the clamping edge, then drawing the height A of the clamping edge vertically upwards by taking the point W as the starting point, drawing the width B of the clamping edge horizontally rightwards by taking the point W as the starting point, and supplementing a rectangle to obtain a dimension position diagram of the.
Further, the method for determining the crown curve of the capsule comprises the following steps: mixing L with1、L2、L3、L4、……、LnPoint-linking, and selecting 3 points L1、L(1+n)/2、LnAn arc is determined.
Further, the method for adjusting the position of the clamping edge to enable the circumference of the outer contour of the capsule to reach the preset value comprises the following steps: and determining the difference E between the perimeter of the outer contour of the bladder and a preset value, and moving the position of the clamping edge outwards by an E x beta distance, wherein beta is a known coefficient related to the aspect ratio of the tire.
Further, the method for determining the capsule thickness distribution comprises the following steps: and smoothly transitionally connecting according to the determined thickness of the seam allowance and the thickness of the crown part of the capsule to obtain the thickness of the connecting part of the capsule.
Furthermore, the thickness of the seam allowance is fixed to be TBR-15.5mm/PCR-10mm within 10mm from the clamping edge.
Furthermore, the thickness of the crown part of the capsule is fixed as TBR-6mm/PCR-4.5mm within the range of PCR-10mm/TBR-20mm from the center of the capsule.
Has the advantages that:
this scheme designs for the foundation according to the interior profile of tire completely, the interior shape that the vulcanization capsule that uses this design method to prepare can perfect match tire, the capsule that appears in can effectual reduction tire production is wrinkled, bad quality defects such as nest gas, avoid the uncertain factor that traditional empirical value design brought, the tire capsule that adapts to multiple specification model sets up, and the capsule shape specification to same model tire design is unified, the mass production of being convenient for, effectively improve the precision of capsule appearance parameter design, in order to prolong the life of vulcanization capsule.
Drawings
FIG. 1 is a schematic cross-sectional view of a bladder clamp, bladder and tire attachment structure in accordance with an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a capsule structure according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a tire structure according to an embodiment of the present invention;
FIG. 4 is a first drawing schematic of the capsule structure in an embodiment of the invention;
FIG. 5 is a second schematic drawing of a capsule structure according to an embodiment of the invention;
FIG. 6 is a third schematic drawing of a capsule structure according to an embodiment of the invention;
FIG. 7 is a fourth drawing schematic of the capsule structure in an embodiment of the invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the following description of the technical solutions of the present invention with reference to the accompanying drawings of the present invention is made clearly and completely, and other similar embodiments obtained by a person of ordinary skill in the art without any creative effort based on the embodiments in 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.
As shown in fig. 1, the bladder clamp 4 clamps the clamping edge 3 of the bladder 2, the bladder 2 forms the inner contour of the tire after being inflated, and the tire is produced by taking the inner contour as a template, as shown in fig. 2, the bladder 2 is a cross-sectional schematic view of an inflated circular bladder, and comprises a clamping edge 3 positioned at the inner ring of the bladder, a bladder crown part 6 positioned at the outer ring of the bladder and a bladder connecting part connecting the clamping edge 3 and the bladder crown part 6, and a sub-mouth part 5 is also arranged between the clamping edge 3 and the bladder connecting part; as shown in fig. 3, the tire 1 is a circular tire matched with the bladder 2, and the size of the bladder is directly reflected on the circumference of the inner contour of the tire, namely the circumference of the outer contour of the bladder is related to the circumference parameter of the inner contour of the tire.
As shown in fig. 4-7, a vulcanized rubber bladder profile parameter design method calculates the values of the outer diameter of the bladder and the outer contour circumference of the bladder based on the known size of the bladder clamp and the parameters of the tire to be processed, specifically:
determining the circumferential stretching rate and the radial stretching rate of the capsule, the width B of the clamping edge, the inner diameter Db of the clamping edge and the height A of the clamping edge according to the known size of the capsule clamp; wherein the circumferential stretch ratio is equal to the radial stretch ratio α.
Determining the tire outer diameter SB, the tread thickness C, the tire inner contour perimeter Lb, the engagement diameter D, the engagement width Wb and the tire rolling axis G according to the known tire parameters to be processed;
the formula according to is:
the bladder outer diameter ═ tire inner diameter/radial stretch rate ═ tire outer diameter-2 tread thickness/radial stretch rate;
the outer contour circumference of the bladder is (the inner contour circumference of the tire + the steel ring width + 2)/the circumferential stretching rate is (the inner contour circumference of the tire + the closed diameter-the inner diameter of the clamping edge-2 + the width of the clamping edge)/the circumferential stretching rate;
and drawing the outline of the capsule according to the obtained outer diameter of the capsule and the perimeter of the outline of the capsule.
Further, the specific process of drawing the outline of the capsule comprises the following steps:
(1) taking the intersection point of the vertical central line of the tire and the inner contour of the tire as a starting point P0With P0as the center of circle, drawing a circle according to the radius r ═ L ═ alpha, and the intersection point with the inner contour of the tire is P1Then with P1as the center of circle, the radius r is L x alpha, and the intersection point of the radius r and the radius L x alpha and the inner contour of the tire is P2By analogy, P is obtained3、P4…Pnwherein, the circumferential stretching ratio and the radial stretching ratio are both α, the fixed interval length L on the capsule is set, and the length of the expanded capsule corresponding to the inner contour of the tire isL α, and further setting the fixed interval length L on the capsule to be 10 mm.
(2) Drawing origin L by taking the maximum diameter point of the crown part of the capsule as the outline of the capsule0，L0To P0Distance M ═ 2 (tire inside diameter-bladder outside diameter), expressed as L0Drawing a circle with radius L as the center of the circle0Is the maximum diameter point of the crown part of the capsule;
(3) with P1As a starting point, a point D is obtained by vertical projection to the rolling axis of the tire1At this time P1To D1Is moved vertically down by a distance N, D1as the center of the circle, drawing a circle according to the radius r being N/alpha, wherein the circle intersects with the circle drawn in the previous step at a point L1By analogy, L is obtained2、L3、……、Lnuntil no intersection point is generated between the two circles, wherein the radius is calculated according to the backward derivation of the radial stretching alpha of the capsule;
(4) determining the position of the clamping edge according to the radius Db of the clamping edge and the bonding width Wb by taking the rolling axis of the tire as a reference; further, the method for determining the position of the clamping edge according to the clamping edge radius Db and the bonding width Wb comprises the following steps: drawing a horizontal line at a position which is half of the inner diameter Db of the clamping edge, wherein the bladder can be regarded as a circular ring, the position of the circular ring is determined, the vertical coordinate of the clamping edge is determined, the horizontal line is intersected with the central line F of the tire at a point O, taking an end point W at a position which takes the O as a starting point and has an outward distance of 1.5 times of the engagement width Wb along the horizontal line, the W point is the edge position of the clamping edge, drawing the height A of the clamping edge upwards vertically by taking the W point as the starting point, drawing the width B of the clamping edge rightwards horizontally by taking the W point as the starting point, and supplementing a rectangle to obtain a dimension position diagram of. The rim is commonly called as a rim, is a part for installing and supporting a tire on the periphery of a wheel, and forms the wheel with a spoke, and the width of the rim corresponds to the width Wb of the tire.
(5) Determining a capsule crown curve; further, the method for determining the crown curve of the capsule comprises the following steps: mixing L with1、L2、L3、L4、……、LnPoint-linking, and selecting 3 points L1、L(1+n)/2、LnAnd determining the arc as the curve of the crown part of the capsule.
(6) Adjusting the position of the clamping edge to enable the periphery of the outer contour of the capsule to reach a preset value; further, the method for adjusting the position of the clamping edge to enable the circumference of the outer contour of the capsule to reach the preset value comprises the following steps: and determining a difference value E between the perimeter of the outer contour of the capsule and a preset value, and moving the position of the clamping edge outwards by an E x beta distance, wherein beta is a known coefficient related to the aspect ratio of the tire, and the larger the aspect ratio is, the larger beta is.
(7) Determining capsule thickness distribution; further, the method for determining the capsule thickness distribution comprises the following steps: the thickness of the capsule connecting part is obtained according to the determined thickness of the sub-mouth part 5 and the thickness of the capsule crown part 6 in a smooth transition connection mode. The thickness of the middle part is smoothly transited to avoid stress concentration, so that the early damage of the capsule is avoided.
(8) The capsule edge and the capsule crown curve are connected by a smooth curve to form the appearance structure of the capsule.
Furthermore, the thickness of the seam allowance is fixed to be TBR-15.5mm/PCR-10mm within 10mm from the clamping edge. The sub-mouth part is the root part of the clamping edge, the deflection position of the capsule when extending up and down is within 10mm according to the industry experience value, the deflection at the position beyond 10mm is small, therefore, the thickness of the part needs to be limited, and TBR-15.5mm/PCR-10mm is the industry reference value thickness.
Furthermore, the thickness of the crown part of the capsule is fixed as TBR-6mm/PCR-4.5mm within the range of PCR-10mm/TBR-20mm from the center of the capsule. The thickness of PCR-10mm/TBR-20mm and TBR-6mm/PCR-4.5mm are both industry reference values.
Reference to the specific examples
A design method for appearance parameters of a vulcanized rubber bladder calculates numerical values of the outer diameter of the bladder and the outer contour circumference of the bladder based on the known size of a bladder clamp and parameters of a tire to be processed, takes 245/70R16 tire specifications as an example, and specifically comprises the following steps:
each factory or company typically has its own bladder holder size standard, and typically the same size standard is used for the production of tires of the same size class. Determining the circumferential stretching rate and the radial stretching rate alpha of the capsule to be 1.2, the width B of the clamping edge to be 15mm, the inner diameter Db of the clamping edge to be 285mm and the height A of the clamping edge to be 26mm according to the size of a capsule clamp actually used in a factory;
determining the tire outer diameter SB to be 772mm, the tread thickness C to be 25.5mm, the tire inner contour perimeter Lb to be 480mm, the fit diameter D to be 406mm, the fit width Wb to be 178mm and the tire rolling axis G according to the known tire parameters to be processed;
the thickness of the tread comes from a material distribution diagram of the specification, the circumference of the inner contour of the tire can be obtained from the material distribution diagram, the closing diameter is an important parameter for designing a tire mold, the closing diameter of a product with the same size grade is unique and belongs to a known value, the product is common in the industry, and the inner diameter of a clamping edge is an important parameter for installing a matched bladder clamp and is derived from the size of the bladder clamp.
The formula according to is:
the bladder outer diameter/radial stretch ratio (tire outer diameter-2 tread thickness)/radial stretch ratio (772-2 25.5)/1.2 ═ 600;
the outer contour circumference of the bladder (tire inner contour circumference + steel rim width x 2)/circumferential stretching rate (tire inner contour circumference + bonding diameter-inner diameter of clamping rim-2 x clamping rim width)/circumferential stretching rate (480+406-285-2 x 15)/1.2 ═ 476;
the obtained DB value of the outer diameter of the capsule is 600mm, and the LB value of the perimeter of the outer contour of the capsule is 476 mm;
and drawing the outline of the capsule according to the obtained external diameter DB and the external outline perimeter LB of the capsule.
The circumferential stretch is equal to the radial stretch.
The specific process of drawing the outline of the capsule comprises the following steps:
(1) taking the intersection point of the vertical central line of the tire and the inner contour of the tire as a starting point P0With P0as the center of circle, a circle is drawn according to the radius r ═ L ═ α ═ 10 ═ 1.2 ═ 12mm, and the intersection point with the inner contour of the tire is P1Then with P1as the center of circle, a circle is drawn with the radius r ═ L ═ α ═ 10 ═ 1.2 ═ 12mm, and the intersection point with the inner contour of the tire is P2By analogy, P is obtained3、P4…Pnwherein, the circumferential stretching ratio and the radial stretching ratio are both α -1.2, the fixed interval length L on the bladder is set to be 10mm, and the length L on the inner outline of the tire corresponding to the expanded bladder is 10 α -1.2 to 12mm, and the inner outline of the tire is provided with a tire inner coreThe contour 12mm wide point corresponds to a capsule 10mm wide.
(2) Drawing origin L by taking the maximum diameter point of the crown part of the capsule as the outline of the capsule0，L0To P0Distance M (tire inner diameter-bladder outer diameter)/2 (60.5 mm) as L0Drawing a circle with the radius L being 10mm as the center of the circle0Is the maximum diameter point of the crown part of the capsule;
(3) with P1As a starting point, a point D is obtained by vertical projection to the rolling axis of the tire1At this time P1To D1Is moved vertically down by a distance N, D1as the center of the circle, drawing a circle according to the radius r being N/alpha, wherein the circle intersects with the circle drawn in the previous step at a point L1By analogy, L is obtained2、L3、……、Lnuntil no intersection point is generated between the two circles, wherein the radius is calculated according to the backward derivation of the radial stretching alpha of the capsule;
(4) determining the position of the clamping edge according to the radius Db of the clamping edge and the bonding width Wb by taking the rolling axis of the tire as a reference; the method for determining the position of the clamping edge according to the clamping edge radius Db and the bonding width Wb comprises the following steps: drawing a horizontal line at a position which is 142.5mm away from the half of the inner diameter Db of the clamping edge, namely taking the rolling axis of the tire as a reference, wherein the bladder can be seen as a circular ring, the position of the circular ring is determined, the vertical coordinate of the clamping edge is determined, the horizontal line is intersected with the central line F of the tire at a point O, taking the point O as a starting point, taking an end point W at a position which is 1.5 times of the outward distance Wb along the horizontal line, namely taking the position of the edge from the central line F267mm of the tire, drawing the height A of the clamping edge vertically upwards by taking the point W as a starting point, drawing the width B of the clamping edge horizontally towards the right by taking the point W as a starting point, namely drawing a rectangle with the width of 15mm and the height of 26mm, and supplementing the rectangle to. The rim is commonly called as a rim, is a part for installing and supporting a tire on the periphery of a wheel, and forms the wheel with a spoke, and the width of the rim corresponds to the width Wb of the tire.
(5) Determining a capsule crown curve; the method for determining the crown curve of the capsule comprises the following steps: mixing L with1、L2、L3、L4、……、LnPoint-linking, and selecting 3 points L1、L(1+n)/2、LnAnd determining the arc as the curve of the crown part of the capsule.
(6) Adjusting the position of the clamping edge to enable the periphery of the outer contour of the capsule to reach a preset value; the method for adjusting the position of the clamping edge to enable the circumference of the outer contour of the capsule to reach a preset value comprises the following steps: and determining a difference value E between the perimeter of the outer contour of the capsule and a preset value, and moving the position of the clamping edge outwards by an E x beta distance, wherein beta is a known coefficient related to the aspect ratio of the tire, and the larger the aspect ratio is, the larger beta is.
(7) Determining capsule thickness distribution; the method for determining the capsule thickness distribution comprises the following steps: and smoothly transitionally connecting according to the determined thickness of the seam allowance and the thickness of the crown part of the capsule to obtain the thickness of the connecting part of the capsule. The thickness of the middle part is smoothly transited to avoid stress concentration, so that the early damage of the capsule is avoided.
(8) The capsule edge and the capsule crown curve are connected by a smooth curve to form the appearance structure of the capsule.
The thickness of the seam allowance is fixed at TBR-15.5mm/PCR-10mm within 10mm from the clamping edge. The sub-mouth part is the root part of the clamping edge, the deflection position of the capsule when extending up and down is within 10mm according to the industry experience value, the deflection at the position beyond 10mm is small, therefore, the thickness of the part needs to be limited, and TBR-15.5mm/PCR-10mm is the industry reference value thickness.
The thickness of the crown part of the capsule is fixed as TBR-6mm/PCR-4.5mm within the range of PCR-10mm/TBR-20mm from the center of the capsule. The thickness of PCR-10mm/TBR-20mm and TBR-6mm/PCR-4.5mm are both industry reference values.
Carry out a series of parameter design for the foundation according to the interior profile of tire, the interior shape that the vulcanization capsule that uses this design method to prepare can perfect match tire, can effectually reduce the bad quality defects such as the capsule that appears in the tire production is wrinkled, nest gas, avoid the uncertain factor that traditional empirical value design brought, the tire capsule that adapts to multiple specification model sets up, and the capsule shape specification to same model tire design is unified, the mass production of being convenient for, effectively improve the precision of capsule appearance parameter design, in order to prolong the life of vulcanization capsule.
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 (10)
1. A vulcanized capsule appearance parameter design method is characterized in that numerical values of the outer diameter of a capsule and the outer contour perimeter of the capsule are calculated based on the known size of a capsule clamp and the parameters of a tire to be processed, and specifically comprises the following steps:
determining the circumferential stretching rate and the radial stretching rate of the capsule, the width of the clamping edge, the inner diameter of the clamping edge and the height of the clamping edge according to the known sizes of the capsule clamps;
determining the outer diameter of the tire, the thickness of a tread, the circumference of the inner contour of the tire, the engagement diameter, the engagement width and the rolling axis of the tire according to known parameters of the tire to be processed;
the formula according to is:
the bladder outer diameter ═ tire inner diameter/radial stretch rate ═ tire outer diameter-2 tread thickness/radial stretch rate;
the outer contour circumference of the bladder is (the inner contour circumference of the tire + the steel ring width + 2)/the circumferential stretching rate is (the inner contour circumference of the tire + the closed diameter-the inner diameter of the clamping edge-2 + the width of the clamping edge)/the circumferential stretching rate;
and drawing the outline of the capsule according to the obtained outer diameter of the capsule and the perimeter of the outline of the capsule.
2. The method of claim 1, wherein the circumferential stretch ratio is equal to the radial stretch ratio.
3. The vulcanized capsule profile parameter design method according to claim 2, wherein the specific process of drawing the capsule profile is as follows:
(1) taking the intersection point of the vertical central line of the tire and the inner contour of the tire as a starting point P0With P0as the center of circle, drawing a circle according to the radius r ═ L ═ alpha, and the intersection point with the inner contour of the tire is P1Then with P1as the center of circle, the radius r is L x alpha, and the intersection point of the radius r and the radius L x alpha and the inner contour of the tire is P2By analogy, P is obtained3、P4…Pnwherein, the circumferential stretching rate and the radial stretching rate are both α, the fixed interval length L on the bladder is set, and the length of the bladder corresponding to the inner contour of the tire after expansion is L x α;
(2) drawing origin L by taking the maximum diameter point of the crown part of the capsule as the outline of the capsule0，L0To P0Distance M ═ 2 (tire inside diameter-bladder outside diameter), expressed as L0Drawing a circle with the radius of L as the center of the circle;
(3) with P1As a starting point, a point D is obtained by vertical projection to the rolling axis of the tire1At this time P1To D1Is moved vertically down by a distance N, D1as the center of circle, drawing a circle according to the radius r being N/α, and intersecting the circle drawn in the previous step at the point L1By analogy, L is obtained2、L3、L4…LnUntil the intersection point between the two circles is not generated any more;
(4) determining the position of the clamping edge according to the radius Db of the clamping edge and the bonding width Wb by taking the rolling axis of the tire as a reference;
(5) determining a capsule crown curve;
(6) adjusting the position of the clamping edge to enable the periphery of the outer contour of the capsule to reach a preset value;
(7) determining capsule thickness distribution;
(8) the capsule edge and the capsule crown curve are connected by a smooth curve to form the appearance structure of the capsule.
4. The method as claimed in claim 3, wherein the fixed interval length L on the capsule is set to 10 mm.
5. The method of claim 3, wherein the step of determining the position of the clamp edge according to the clamp edge radius Db and the bonding width Wb comprises: drawing a horizontal line at a position which is half of the inner diameter Db of the clamping edge, intersecting the horizontal line with the center line of the tire at a point O, taking an end point W at a position which takes the point O as a starting point and has an outward distance of 1.5 times of the closing width Wb along the horizontal line, taking the point W as an edge position of the clamping edge, then drawing the height A of the clamping edge vertically upwards by taking the point W as the starting point, drawing the width B of the clamping edge horizontally rightwards by taking the point W as the starting point, and supplementing a rectangle to obtain a dimension position diagram of the.
6. The vulcanized capsule profile parameter design method as claimed in claim 3, wherein the method for determining the crown curve of the capsule comprises the following steps: mixing L with1、L2、L3、L4、……、LnPoint-linking, and selecting 3 points L1、L(1+n)/2、LnAn arc is determined.
7. The method for designing the profile parameters of the vulcanized capsule as claimed in claim 3, wherein the method for adjusting the position of the clamping edge to make the circumference of the outer contour of the capsule reach the preset value comprises the following steps: and determining the difference E between the perimeter of the outer contour of the bladder and a preset value, and moving the position of the clamping edge outwards by an E x beta distance, wherein beta is a known coefficient related to the aspect ratio of the tire.
8. The vulcanized capsule profile parameter design method as claimed in claim 3, wherein the method for determining the capsule thickness distribution comprises the following steps: and smoothly transitionally connecting according to the determined thickness of the seam allowance and the thickness of the crown part of the capsule to obtain the thickness of the connecting part of the capsule.
9. The method as claimed in claim 8, wherein the thickness of the seam allowance is TBR-15.5mm/PCR-10mm within 10mm from the edge of the clamp.
10. The method as claimed in claim 8, wherein the thickness of the crown part of the capsule is TBR-6mm/PCR-4.5mm within the range of PCR-10mm/TBR-20mm from the center of the capsule.
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| CN202010639799.4A Active CN111709100B (en) | 2020-07-06 | 2020-07-06 | Method for designing appearance parameters of vulcanized capsules |
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Citations (4)
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|---|---|---|---|---|
| JP2006095753A (en) * | 2004-09-28 | 2006-04-13 | Bridgestone Corp | Tire vulcanizing bladder |
| CN2887565Y (en) * | 2005-10-31 | 2007-04-11 | 四川轮胎橡胶（集团）股份有限公司 | B type tire vulcanized capsule clamp |
| JP2009073047A (en) * | 2007-09-20 | 2009-04-09 | Bridgestone Corp | Method of manufacturing vulcanizing bladder and vulcanizing bladder |
| CN210174241U (en) * | 2019-04-22 | 2020-03-24 | 赛轮集团股份有限公司 | Tire curing bladder |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006095753A (en) * | 2004-09-28 | 2006-04-13 | Bridgestone Corp | Tire vulcanizing bladder |
| CN2887565Y (en) * | 2005-10-31 | 2007-04-11 | 四川轮胎橡胶（集团）股份有限公司 | B type tire vulcanized capsule clamp |
| JP2009073047A (en) * | 2007-09-20 | 2009-04-09 | Bridgestone Corp | Method of manufacturing vulcanizing bladder and vulcanizing bladder |
| CN210174241U (en) * | 2019-04-22 | 2020-03-24 | 赛轮集团股份有限公司 | Tire curing bladder |
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| CN111709100B (en) | 2023-10-20 |
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