CN115366299B - Manufacturing method of tire mold - Google Patents
Manufacturing method of tire mold Download PDFInfo
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- CN115366299B CN115366299B CN202211120865.2A CN202211120865A CN115366299B CN 115366299 B CN115366299 B CN 115366299B CN 202211120865 A CN202211120865 A CN 202211120865A CN 115366299 B CN115366299 B CN 115366299B
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- blank
- die blank
- turning
- lower die
- forging
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 238000005242 forging Methods 0.000 claims abstract description 49
- 238000012545 processing Methods 0.000 claims abstract description 38
- 238000000137 annealing Methods 0.000 claims abstract description 23
- 238000003754 machining Methods 0.000 claims abstract description 15
- 238000005266 casting Methods 0.000 claims abstract description 13
- 238000012937 correction Methods 0.000 claims abstract description 10
- 238000013461 design Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 20
- 230000008569 process Effects 0.000 claims description 15
- 238000005553 drilling Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/24—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2030/00—Pneumatic or solid tyres or parts thereof
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Forging (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention provides a manufacturing method of a tire mold, and relates to the technical field of tire mold production and processing. The manufacturing method of the tire mold comprises the following specific steps: step one, blank casting: according to the design size of the tire mold, casting two blanks with fixed volumes to be respectively used as an upper die blank and a lower die blank; step two, forging blanks: forging the two cast blanks by using a forging machine to form the main body profile of the blank; step three, blank annealing: sending the two blanks after forging forming into an annealing furnace for annealing treatment; step four, blank correction: after the annealing is finished, stacking the upper die blank and the lower die blank, and synchronously correcting the upper die blank and the lower die blank by using a correcting machine. By adopting the rough forging, finish forging and combined machining processes, the turning and the grain machining of the upper die and the lower die can be rapidly finished after the forging is finished, so that the matching precision between the upper die and the lower die is ensured, and meanwhile, the production machining efficiency and the machining progress can be improved.
Description
Technical Field
The invention relates to the technical field of tire mold production and processing, in particular to a manufacturing method of a tire mold.
Background
Tires are ground-engaging rolling, annular elastomeric rubber articles assembled on a variety of vehicles or machines. The automobile body is usually arranged on a metal rim, can support the automobile body, buffer external impact, realize contact with a road surface and ensure the running performance of the automobile. Tires are often used under complex and severe conditions, and they are subjected to various deformations, loads, forces and high and low temperatures during running, and therefore must have high load-bearing, traction and cushioning properties. At the same time, it is also required to have high wear resistance and flex resistance, as well as low rolling resistance and heat buildup. The tire mold is a mold for vulcanizing and molding various tires, and is generally divided into a segmented mold and two half molds, wherein the segmented mold consists of a pattern ring, a mold sleeve and upper and lower side plates, and the segmented mold is used for distinguishing a conical surface guide segmented mold and a bevel surface guide segmented mold; and the two half dies are composed of an upper die and a lower die.
The tire main body structure is required to be vulcanized after the support is formed, the tire mold is a special mold for vulcanizing a rubber tire, the most common tire vulcanization mold at present is composed of an upper mold and a lower mold, the tire mold in the market at present is produced and manufactured by forging and forming the upper mold main body and the lower mold main body, rough turning and finish turning are sequentially carried out on the upper mold and the lower mold by using a lathe after annealing, and finally patterns of tire walls are respectively processed on the inner side of the mold by using a CNC processing center.
For this reason, we have developed a new method of manufacturing tire molds.
Disclosure of Invention
(One) solving the technical problems
Aiming at the defects of the prior art, the invention provides a manufacturing method of a tire mold, which solves the problems that the traditional tire mold production and manufacturing process is time-consuming and labor-consuming, the matching precision between an upper mold and a lower mold cannot be ensured, the production and processing efficiency and the processing progress are not beneficial to improvement, a plurality of corner wastes are easy to generate on the processed tire surface in the actual use process of the mold, and manual cleaning is needed again in the follow-up process.
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme: a method of manufacturing a tire mold comprising the specific steps of:
Step one, blank casting: according to the design size of the tire mold, casting two blanks with fixed volumes to be respectively used as an upper die blank and a lower die blank;
Step two, forging blanks: forging the two cast blanks by using a forging machine to form the main body profile of the blank;
step three, blank annealing: sending the two blanks after forging forming into an annealing furnace for annealing treatment;
step four, blank correction: after the annealing is finished, stacking the upper die blank and the lower die blank, and synchronously correcting the upper die blank and the lower die blank by using a correcting machine;
Turning the end face: turning the die closing end surfaces of the upper die blank and the lower die blank by using a lathe respectively to enable the end surfaces of the upper die blank and the lower die blank to be kept level, wherein the gap error is less than or equal to 0.3mm;
Step six, turning an outer circle: clamping and fixing the upper die blank and the lower die blank by utilizing a rotating main shaft and a jacking mechanism of a lathe, enabling central axes of the upper die blank and the lower die blank to be positioned on the same straight line, driving the two blanks to synchronously rotate by the rotating main shaft, and finishing excircle turning of the upper die blank and the lower die blank by an excircle turning tool;
Seventh, turning the inner circle: clamping and fixing the upper die blank and the lower die blank after turning the outer circle by using a fixing clamp, fixing the lower die blank on a rotating main shaft, and finishing the inner circle turning of the upper die blank and the lower die blank by an inner circle lane at the same time;
Step eight, processing lines: after finishing the internal turning, integrally moving the internal turning to a CNC machining center, fixing a lower die blank on a fixed base of the CNC machining center, and machining lines on the inner sides of the upper die blank and the lower die blank by a CNC machining main shaft;
step nine, drilling: drilling a material injection hole on the top of the upper die by using drilling equipment;
step ten, welding and detecting: and respectively welding corresponding connecting seats or lifting lugs on the machined upper and lower dies according to the actual installation and connection requirements of the dies, and detecting the size and the precision of the whole die.
Preferably, the blank cast in the first step is in a ring shape, and the ring-shaped cast blank is convenient for casting production and is also convenient for subsequent forging processing.
Preferably, the blank forging in the second step is divided into two forging stages, wherein the first stage adopts a rough forging die to finish rough forging forming, and the second stage adopts a finish forging die to finish forging forming.
Through the technical scheme, the first stage and the second stage can respectively finish rough forging and finish forging of the blank, the blank after finish forging is more convenient for subsequent production and processing, and meanwhile, the processing time can be saved.
Preferably, the blank annealing temperature in the third step is controlled at 525-530 ℃ and the annealing time is 2-3h.
Through the technical scheme, the blank is annealed for 2-3 hours at the temperature of 525-530 ℃, so that the stress can be well removed, and 90-95% of the internal stress of the casting can be eliminated.
Preferably, the synchronous rectification of the upper die blank and the lower die blank in the fourth step comprises external circular rectification and internal circular rectification.
Through the technical scheme, the inner circles and the outer circles of the upper die blank and the lower die blank are synchronously corrected, so that the dimensional deviation between the upper die blank and the lower die blank can be ensured, and the subsequent turning is more convenient.
Preferably, when the end face is turned, the outer circle is turned and the inner circle is turned, a vertical lathe can be adopted, and a horizontal lathe can be adopted.
Preferably, the fixing clamp is required to be kept fixed in the process of turning the inner circle, processing the grains and transferring the grains between the inner circle and the fixing clamp.
Through above-mentioned technical scheme, go up mould blank and lower mould blank and fix through adopting mounting fixture, can guarantee interior turning, line processing and the fixed of the relative position in the transportation in-process between the two, can not take place the displacement between the two to guarantee the axiality in turning processing and the line processing, and then guaranteed the assembly precision between upper and lower mould, the mould also can not produce a lot of leftover bits at in-service use's in-process, the tire of processing has also practiced thrift the follow-up time of cleaing away.
Preferably, the line processing is finished once in the line processing process, and the line processing cannot be stopped or recalibrated in the middle.
Through the technical scheme, the processing precision of the lines can be ensured, the processed tire lines are more uniform and attractive, and the tire lines have better wear resistance and skid resistance.
(III) beneficial effects
The invention provides a manufacturing method of a tire mold. The beneficial effects are as follows:
1. According to the manufacturing method of the tire mold, through adopting the rough forging, the finish forging and the combined machining process, turning and texture machining of the upper mold and the lower mold can be completed rapidly after forging is completed, so that the matching precision between the upper mold and the lower mold is ensured, and meanwhile, the production machining efficiency and the machining progress can be improved.
2. According to the manufacturing method of the tire mold, the upper mold and the lower mold are combined and processed, so that the assembly precision between the upper mold and the lower mold can be ensured, meanwhile, the processing procedure is simplified, and the processed tire can not generate a lot of leftover materials in the use process of the mold, so that the subsequent cleaning time is saved.
Drawings
FIG. 1 is a schematic diagram of a machining structure of an end face turning process of the present invention;
FIG. 2 is a schematic diagram of a processing structure of the cylindrical turning process of the present invention;
FIG. 3 is a schematic diagram of the internal turning process of the present invention;
fig. 4 is a schematic diagram of a processing structure of the texture processing process according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples:
as shown in fig. 1 to 4, an embodiment of the present invention provides a method for manufacturing a tire mold, including the following specific steps:
Step one, blank casting: according to the design size of the tire mold, casting two blanks with fixed volumes to be respectively used as an upper die blank and a lower die blank;
Step two, forging blanks: forging the two cast blanks by using a forging machine to form the main body profile of the blank;
step three, blank annealing: sending the two blanks after forging forming into an annealing furnace for annealing treatment;
step four, blank correction: after the annealing is finished, stacking the upper die blank and the lower die blank, and synchronously correcting the upper die blank and the lower die blank by using a correcting machine;
Turning the end face: turning the die closing end surfaces of the upper die blank and the lower die blank by using a lathe respectively to enable the end surfaces of the upper die blank and the lower die blank to be kept level, wherein the gap error is less than or equal to 0.3mm;
Step six, turning an outer circle: clamping and fixing the upper die blank and the lower die blank by utilizing a rotating main shaft and a jacking mechanism of a lathe, enabling central axes of the upper die blank and the lower die blank to be positioned on the same straight line, driving the two blanks to synchronously rotate by the rotating main shaft, and finishing excircle turning of the upper die blank and the lower die blank by an excircle turning tool;
Seventh, turning the inner circle: clamping and fixing the upper die blank and the lower die blank after turning the outer circle by using a fixing clamp, fixing the lower die blank on a rotating main shaft, and finishing the inner circle turning of the upper die blank and the lower die blank by an inner circle lane at the same time;
Step eight, processing lines: after finishing the internal turning, integrally moving the internal turning to a CNC machining center, fixing a lower die blank on a fixed base of the CNC machining center, and machining lines on the inner sides of the upper die blank and the lower die blank by a CNC machining main shaft;
step nine, drilling: drilling a material injection hole on the top of the upper die by using drilling equipment;
step ten, welding and detecting: and respectively welding corresponding connecting seats or lifting lugs on the machined upper and lower dies according to the actual installation and connection requirements of the dies, and detecting the size and the precision of the whole die.
In the manufacturing method, the blank cast in the first step is in a circular ring shape, so that the casting blank in the circular ring shape is convenient for casting production and is convenient for subsequent forging processing;
In the second step, blank forging is divided into two forging stages, wherein the first stage adopts a rough forging die to finish rough forging forming, the second stage adopts a finish forging die to finish forging forming, the first stage and the second stage can respectively finish rough forging and finish forging of blanks, and the blanks after finish forging are more convenient for subsequent production and processing, and meanwhile, the processing time can be saved;
in the third step, the annealing temperature of the blank is controlled at 525-530 ℃, the annealing time is 2-3h, and the blank is annealed at 525-530 ℃ for 2-3h, so that the stress can be well removed, and the internal stress of the casting can be eliminated by 90-95%;
In the fourth step, the synchronous correction of the upper die blank and the lower die blank comprises the correction of the outer circle and the correction of the inner circle, and the dimensional deviation between the upper die blank and the lower die blank can be ensured by synchronously correcting the inner circle and the outer circle of the upper die blank and the inner circle of the lower die blank, so that the subsequent turning is more convenient;
When the end face is turned, the outer circle is turned and the inner circle is turned, a vertical lathe can be adopted, and a horizontal lathe can also be adopted; the inner circle turning, the grain processing and the fixing clamp are all required to be fixed in the transferring process between the inner circle turning and the grain processing, the upper die blank and the lower die blank are fixed by adopting the fixing clamp, the inner circle turning, the grain processing and the fixing of the relative positions in the transferring process between the upper die blank and the lower die blank can be ensured, displacement can not occur between the upper die blank and the lower die blank, the coaxiality in the turning processing and the grain processing processes is ensured, the assembly precision between the upper die and the lower die is further ensured, and a plurality of corner wastes can not be generated in the tire processed in the actual use process of the die, so that the subsequent cleaning time is saved;
In the process of processing the texture, the processing of the texture needs to be completed once, and the machine cannot be stopped or recalibrated in the middle, so that the processing precision of the texture can be ensured, the processed tire texture is more uniform and attractive, and the tire has better wear resistance and skid resistance.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A method for manufacturing a tire mold, comprising the specific steps of:
Step one, blank casting: according to the design size of the tire mold, casting two blanks with fixed volumes to be respectively used as an upper die blank and a lower die blank;
Step two, forging blanks: forging the two cast blanks by using a forging machine to form the main body profile of the blank;
step three, blank annealing: sending the two blanks after forging forming into an annealing furnace for annealing treatment;
step four, blank correction: after the annealing is finished, stacking the upper die blank and the lower die blank, and synchronously correcting the upper die blank and the lower die blank by using a correcting machine;
Turning the end face: turning the die closing end surfaces of the upper die blank and the lower die blank by using a lathe respectively to enable the end surfaces of the upper die blank and the lower die blank to be kept level, wherein the gap error is less than or equal to 0.3mm;
Step six, turning an outer circle: clamping and fixing the upper die blank and the lower die blank by utilizing a rotating main shaft and a jacking mechanism of a lathe, enabling central axes of the upper die blank and the lower die blank to be positioned on the same straight line, driving the two blanks to synchronously rotate by the rotating main shaft, and finishing excircle turning of the upper die blank and the lower die blank by an excircle turning tool;
Seventh, turning the inner circle: clamping and fixing the upper die blank and the lower die blank after turning the outer circle by using a fixing clamp, fixing the lower die blank on a rotating main shaft, and finishing the inner circle turning of the upper die blank and the lower die blank by an inner circle lane at the same time;
Step eight, processing lines: after finishing the internal turning, integrally moving the internal turning to a CNC machining center, fixing a lower die blank on a fixed base of the CNC machining center, and machining lines on the inner sides of the upper die blank and the lower die blank by a CNC machining main shaft;
step nine, drilling: drilling a material injection hole on the top of the upper die by using drilling equipment;
step ten, welding and detecting: and respectively welding corresponding connecting seats or lifting lugs on the machined upper and lower dies according to the actual installation and connection requirements of the dies, and detecting the size and the precision of the whole die.
2. A method of manufacturing a tire mold as in claim 1, wherein: and (3) the blank cast in the step one is annular.
3. A method of manufacturing a tire mold as in claim 1, wherein: in the second step, blank forging is divided into two forging stages, wherein the first stage adopts a rough forging die to finish rough forging forming, and the second stage adopts a finish forging die to finish forging forming.
4. A method of manufacturing a tire mold as in claim 1, wherein: and in the third step, the annealing temperature of the blank is controlled at 525-530 ℃ and the annealing time is 2-3h.
5. A method of manufacturing a tire mold as in claim 1, wherein: and in the fourth step, the synchronous correction of the upper die blank and the lower die blank comprises the correction of the outer circle and the correction of the inner circle.
6. A method of manufacturing a tire mold as in claim 1, wherein: when the end face turning, the outer circle turning and the inner circle turning are performed, a vertical lathe can be adopted, and a horizontal lathe can also be adopted.
7. A method of manufacturing a tire mold as in claim 6, wherein: the internal turning, the line processing and the fixing clamp are all required to be kept fixed in the transferring process between the internal turning and the line processing.
8. A method of manufacturing a tire mold as in claim 1, wherein: in the course of processing the grain, the grain processing needs to be completed once, and the machine cannot be stopped or recalibrated in the middle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211120865.2A CN115366299B (en) | 2022-09-15 | 2022-09-15 | Manufacturing method of tire mold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211120865.2A CN115366299B (en) | 2022-09-15 | 2022-09-15 | Manufacturing method of tire mold |
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| Publication Number | Publication Date |
|---|---|
| CN115366299A CN115366299A (en) | 2022-11-22 |
| CN115366299B true CN115366299B (en) | 2024-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211120865.2A Active CN115366299B (en) | 2022-09-15 | 2022-09-15 | Manufacturing method of tire mold |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101224541A (en) * | 2008-02-05 | 2008-07-23 | 揭阳市天阳模具有限公司 | Method for accurately manufacturing pattern sector block of radial tire segmented mold |
| CN111465478A (en) * | 2017-11-27 | 2020-07-28 | 株式会社普利司通 | Method for manufacturing tire mold |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6886250B2 (en) * | 2003-03-25 | 2005-05-03 | Shu-Yuan Liao | Method of manufacturing for aluminum alloy wheel rim |
| JP3895309B2 (en) * | 2003-07-28 | 2007-03-22 | 日本碍子株式会社 | Manufacturing method of tire molding die and tire molding die manufactured by the manufacturing method |
| JP2007015152A (en) * | 2005-07-06 | 2007-01-25 | Ngk Insulators Ltd | Manufacturing method of piece assembling type tire mold |
| JP5136094B2 (en) * | 2008-01-31 | 2013-02-06 | 横浜ゴム株式会社 | Manufacturing method of tire vulcanization mold |
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2022
- 2022-09-15 CN CN202211120865.2A patent/CN115366299B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101224541A (en) * | 2008-02-05 | 2008-07-23 | 揭阳市天阳模具有限公司 | Method for accurately manufacturing pattern sector block of radial tire segmented mold |
| CN111465478A (en) * | 2017-11-27 | 2020-07-28 | 株式会社普利司通 | Method for manufacturing tire mold |
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| CN115366299A (en) | 2022-11-22 |
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