CN110978608A - Stamping die spotting machine - Google Patents
Stamping die spotting machine Download PDFInfo
- Publication number
- CN110978608A CN110978608A CN201911111559.0A CN201911111559A CN110978608A CN 110978608 A CN110978608 A CN 110978608A CN 201911111559 A CN201911111559 A CN 201911111559A CN 110978608 A CN110978608 A CN 110978608A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
- B30B15/026—Mounting of dies, platens or press rams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
- B30B15/028—Loading or unloading of dies, platens or press rams
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention relates to a stamping die spotting machine, which comprises a machine body and a lower template, wherein the lower template is horizontally and slidably arranged at the upper end of the machine body, a plurality of guide columns are vertically arranged on two sides of the machine body, upper fixing plates are respectively arranged at the tops of the guide columns on the two sides of the machine body, guide middle seats are arranged on the guide columns on the same side in a lifting and sliding manner, the guide middle seats on the two sides are driven by lifting cylinders vertically arranged on the machine body to synchronously lift, a reversible upper template is arranged between the guide middle seats on the two sides, and a rotary driving device for driving the upper template to turn over is arranged on the guide middle seat on one side or two sides. The invention has simple structure, utilizes the impact energy formed by the impact of the free falling body or the additional force to simulate the mold closing force, has accurate and clear red bill printing effect and can finish mold repair more quickly.
Description
Technical Field
The invention relates to the field of die spotting machines, in particular to a stamping die spotting machine.
Background
The die spotting press is a professional die research and matching device and is mainly used for pressurizing and die spotting by different pressures for upper and lower dies during the later stage of die manufacturing. At present, a die spotting machine basically coats a red sheet on one side of a die, pressure is applied to the die after a movable die and a fixed die are jointed, then the die is opened to determine die repairing action according to the condition that the red sheet is printed on the other side of the die, and the actions are repeated until the requirements are met; and after the movable mould and the fixed mould are attached, the die spotting machine applies a die spotting force to the mould, the force is very large, and the force is finally resisted by the interior of the equipment, so that the equipment can be very solid, the equipment also needs larger motor power to provide large die spotting force during running, the two aspects of equipment manufacturing materials and the die spotting force provided by the equipment are considered to be not in accordance with the large trend of energy conservation and emission reduction, and the equipment manufacturing cost is also high.
Disclosure of Invention
The invention aims to solve the technical problem of providing a stamping die spotting machine which is simple in structure, utilizes impact energy of an object after free falling to simulate a die spotting force, is accurate and clear in red sheet printing effect and can finish die repairing more quickly.
The technical scheme adopted by the invention for solving the technical problems is as follows: the upper end of the lathe body is horizontally and slidably provided with the lower template, a plurality of guide columns are vertically arranged on two sides of the lathe body, the tops of the guide columns on two sides of the lathe body are provided with an upper fixing plate, guide middle seats are arranged on the guide columns on the same side in a lifting sliding mode, the guide middle seats on two sides are driven by lifting cylinders vertically arranged on the lathe body to lift synchronously, a turnover upper template is arranged between the guide middle seats on two sides, and a rotary driving device for driving the upper template to turn over is arranged on the guide middle seat on one side.
Furthermore, the lower template is driven by a moving-in and moving-out mechanism arranged inside the machine body to horizontally slide along guide rails on two sides of the upper end of the machine body.
Furthermore, after the lower template is moved into the die-clamping area, four lower template lifting oil cylinders in the lathe bed descend to the right position, and the lower template is horizontally placed on the lathe bed.
Furthermore, the guide middle base is driven to lift by two lifting oil cylinders on two sides of the guide middle base.
Preferably, the guide middle seat is connected with the rotary supporting plates on two sides of the upper template through a connecting circular shaft, the rotary driving device is axially connected with the connecting circular shaft on one side, and a plurality of bearings are sleeved between the outer side of the connecting circular shaft and the guide middle seat.
Further, the upper end of seat installs cope match-plate pattern upset stop gear in one of them direction, cope match-plate pattern upset stop gear including installing the installation base in seat in the direction upper end, the one end that the installation base upside is close to the cope match-plate pattern be provided with the deflector, first lock cylinder or hydro-cylinder are installed to the other end, the extension bar of first lock cylinder or hydro-cylinder link to each other with the first locking axle that passes the deflector, the rotatory backup pad on be close to one side at the cope match-plate pattern back and open and have the spacing groove, the rotatory first locking axle that resets and run into in the direction when the mechanical backer of seat one side inserts the spacing groove.
Furthermore, a lifting locking plate which upwards penetrates through the upper fixing plate is vertically arranged on the other guide middle seat, a second locking cylinder or an oil cylinder is arranged on the lower side of the upper fixing plate, a plurality of inserting holes are uniformly formed in the lifting locking plate, and an extension rod of the second locking cylinder or the oil cylinder is connected with a second locking shaft which penetrates through any one inserting hole.
Furthermore, the lower end of the upper fixing plate is provided with auxiliary locking blocks positioned on two sides of the lifting locking plate, and the second locking shaft penetrates through the two auxiliary locking blocks and the lifting locking plate when being locked.
Furthermore, both sides of the guide middle seat are connected with a pair of lifting connecting plates which vertically extend upwards side by side, and the extension rod of the lifting oil cylinder is positioned between the lifting connecting plates which are arranged side by side and connected with the lifting connecting plates.
Furthermore, the upper template is a magnetic template or a common template.
Furthermore, the upper cavity of the lift cylinder is communicated with air or power oil, the lower cavity of the lift cylinder is discharged to the main oil tank through the auxiliary oil tank, and the auxiliary oil tank is arranged on one side of the lower cavity of the lift cylinder.
Has the advantages that: the invention relates to a stamping die spotting machine, which has simple structure, utilizes free falling bodies or extra given force to impact the stamping die spotting machine to form impact force, the impact force of a movable die and a fixed die at the moment of contact is far higher than the die spotting force exerted by the prior die spotting machine after controllable fitting of the die, so the effect of printing a red sheet is better than that of the conventional die spotting machine, the places where the die does not meet the requirements can be better reflected, the die can be repaired more accurately, the effect is better, the die manufacturing production can be completed more quickly, the efficiency is higher, the equipment manufacturing materials are greatly reduced, the trend of energy conservation and emission reduction is met, the equipment height is reduced, and the requirement on the height and the size of a factory building; and have a plurality of locking limit structure, can guarantee the safe operation of clapper die spotting press.
Drawings
FIG. 1 is a perspective view of the present invention in a mold repair state;
FIG. 2 is a perspective view of a mold clamping test of the present invention;
FIG. 3 is a front view semi-section block diagram of the present invention;
FIG. 4 is an enlarged partial block diagram of the present invention;
FIG. 5 is an enlarged partial block diagram of the present invention;
FIG. 6 is a schematic perspective view of step 1 of the present invention;
FIG. 7 is a schematic perspective view of step 2 of the present invention;
FIG. 8 is a schematic perspective view of step 3 of the present invention;
FIG. 9 is a perspective view of step 4 of the present invention;
FIG. 10 is a perspective view of step 5 of the present invention;
FIG. 11 is a schematic perspective view of step 6 of the present invention;
FIG. 12 is a perspective view of step 7 of the present invention;
FIG. 13 is a perspective view of step 8 of the present invention;
FIG. 14 is a perspective view of step 9 of the present invention;
fig. 15 is a perspective view of step 10 of the present invention.
The figure is as follows: 1. the device comprises a lathe bed, 2, a lifting oil cylinder, 3, an upper fixing plate, 4, a guide middle seat, 5 and a guide pillar; 6. the device comprises a rotary driving device 7, an upper template 8, a lower template 9, an upper template overturning limiting mechanism 10 and a lifting connecting plate; 11. connecting the round shaft; 12. a bearing; 13. rotating the support plate; 14. a limiting groove; 15. a lifting locking plate; 16. an auxiliary locking block; 18. a second locking cylinder or oil cylinder; 19. a second locking shaft; 20. an auxiliary oil tank; 21. a moving-in and moving-out mechanism; 91. a first locking cylinder or oil cylinder; 92. a guide plate; 93. a first locking shaft; 94. installing a base; 95. mechanical backer.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
As shown in fig. 1-5, the embodiment of the invention relates to a stamping and die spotting machine, which comprises a machine body 1 and a lower template 8, wherein the lower template 8 is horizontally installed at the upper end of the machine body 1 in a sliding manner, a plurality of guide columns 5 are vertically installed on both sides of the machine body 1, upper fixing plates 3 are installed on the tops of the guide columns 5 on both sides of the machine body 1, guide middle seats 4 are arranged on the guide columns 5 on the same side in a lifting and sliding manner, the guide middle seats 4 on both sides are driven by lifting cylinders 2 vertically installed on the machine body 1 to synchronously lift, a reversible upper template 7 is arranged between the guide middle seats 4 on both sides, and a rotary driving device 6 for driving the upper template 7 to overturn is installed on the guide middle seat 4 on one side.
The lower template 8 is driven by a shifting-in and shifting-out mechanism 21 arranged inside the machine body 1 to horizontally slide along guide rails on two sides of the upper end of the machine body 1, and the shifting-in and shifting-out mechanism 21 is a mechanism driven by a chain wheel driven by a hydraulic motor.
The guide middle seat 4 is driven to lift by the two lifting cylinders 2 on the two sides of the guide middle seat, the two lifting cylinders 2 on the two sides drive the two guide middle seats 4 and the upper template 7 to lift synchronously, and the guide middle seat 4 can fall freely after the lifting cylinders 2 release pressure.
The direction in seat 4 link to each other through the rotatory backup pad 13 of connecting circle axle 11 and cope match-plate pattern 7 both sides, rotary driving device 6 and the 11 axial connections of the connection circle axle of one side, the outside of connecting circle axle 11 and direction in seat 4 between cup jointed a plurality of bearing 12, the stability of cope match-plate pattern 7 upset connection has been guaranteed to this kind of structure, bulk strength is big.
The rotary driving device 6 is a rotary oil cylinder or a motor or a gear or a synchronous belt pulley or a chain wheel, and generally, a plurality of rotary oil cylinders are adopted, so that the upper die plate 7 can be turned over.
The specific work flow of the stamping die spotting machine is as follows:
step 1: as shown in fig. 6, the lower template 8 is moved out, and the whole set of dies is fixed on the lower template 8, with the front of the upper template 7 facing downwards and located at a high position;
step 2: as shown in fig. 7, the lower template 8 is driven to drive the die to move into the position right below the upper template 7;
and step 3: as shown in fig. 7, the lifting oil cylinders of the inner and lower templates of the bed body descend to the right position, and the lower template is flatly placed on the upper body of the bed and is not forced to move into and out of the track;
and 4, step 4: the second locking oil cylinder 18 drives the second locking shaft 19 to exit from the mechanical safety position;
and 5: as shown in fig. 8, the upper die plate 7 is lowered to a position to fix the movable die on the upper side to the upper die plate 7;
step 6: as shown in fig. 9, the lifting cylinder 2 drives the upper mold plate 7 to move upwards, so that the upper side and the lower side of the mold are separated, and a red sheet is coated on the mold core on one side;
and 7: as shown in fig. 10, the lifting cylinder 2 drives the upper template 7 to controllably lower to a certain height;
and 8: as shown in fig. 11, the movable mold on the upper mold plate 7 freely falls or is additionally forced to impact the lower mold, and here, the movable mold on the upper mold plate 7 can also impact the lower mold together with the upper mold plate 7 or can impact the upper mold alone;
and step 9: as shown in fig. 12, the lifting cylinder 2 drives the upper die plate to move upwards, so that the upper side and the lower side of the die are separated;
step 10: as shown in fig. 13, the lower platen 8 is translated out with the lower mold;
step 11: as shown in fig. 14, after the lower mold plate 8 with the lower mold is moved out to the position, the rotary driver 6 drives the upper mold plate 7 to rotate by a certain angle, generally 180 °, but may be any angle from 0 ° to 180 ° as required;
and step 12, as shown in fig. 15, the lifting oil cylinder 2 drives the upper template 7 to descend, and a mold maintainer observes the printing condition of the red note on the mold and repairs the mold according to the condition.
According to actual conditions, the stamping and die assembly may need to be repeated for several times until the die repair is completed. And after the die repairing is finished, performing reverse actions of the steps until the die is lifted out.
In order to guarantee the accuracy of the position after the cope match-plate pattern 7 overturns, install mechanical backer 95 in one of them direction on seat 4, still install cope match-plate pattern upset stop gear 9, cope match-plate pattern upset stop gear 9 including installing installation base 94 in seat 4 upper end in the direction, the one end that installation base 94 upside is close to cope match-plate pattern 7 be provided with deflector 92, first lock cylinder or hydro-cylinder 91 are installed to the other end, the extension bar of first lock cylinder or hydro-cylinder 91 link to each other with the first lock axle 93 that passes deflector 92, rotatory backup pad 13 on be close to one side at the cope match-plate pattern 7 back and open and have spacing groove 14, first lock axle 93 inserts in spacing groove 14 when mechanical backer 95 was met in the rotatory restoration of cope match-plate pattern 7.
In order to ensure the vertical position of the upper template 7, a lifting locking plate 15 which upwards penetrates through the upper fixing plate 3 is vertically arranged on the other guide middle seat 4, a second locking cylinder or oil cylinder 18 is arranged on the lower side of the upper fixing plate 3, a plurality of inserting holes are uniformly formed in the lifting locking plate 15, and an extension rod of the second locking cylinder or oil cylinder 18 is connected with a second locking shaft 19 which penetrates through any one inserting hole.
The lower end of the upper fixing plate 3 is provided with auxiliary locking blocks 16 positioned at both sides of the lifting locking plate 15, and the second locking shaft 19 passes through the two auxiliary locking blocks 16 and the lifting locking plate 15 at the same time.
The two sides of the guide middle seat 4 are connected with a pair of lifting connecting plates 10 which vertically extend upwards side by side, the extension rod of the lifting oil cylinder 2 is positioned between the lifting connecting plates 10 which are arranged side by side and connected with the lifting connecting plates 10, and the upper cavity of the lifting oil cylinder is communicated with air or power oil.
The upper template 7 is a magnetic template or a common template, and if a magnetic template scheme is adopted, the magnetic template can generate magnetic force after being electrified to attract the mold, and the movable mold on the upper template 7 is released to be freely fallen when the power is off, so that the implementation mode of realizing the free falling of the movable mold is realized.
The scheme adopts a common template, and the lower cavity of the lifting oil cylinder 2 is quickly decompressed, so that the upper template 7 and the upper die fall together to impact the lower die. In order to increase the impact force, power (such as an energy accumulator) can be additionally provided on the upper cavity of the lifting oil cylinder to increase the impact force.
The invention has simple structure, the impact force of the impact of the free falling body or the additional given force is utilized, the impact force of the movable and fixed dies at the moment of contact is far higher than the mold closing force applied by the conventional mold closing machine after the controllable attachment of the dies, so the effect of printing the red sheet is better than that of the conventional mold closing machine, the places where the dies do not meet the requirements can be better reflected, the dies can be repaired more accurately, the effect is better, the die manufacturing production can be completed more quickly, the efficiency is higher, the equipment manufacturing material is greatly reduced, the trend of energy conservation and emission reduction is met, the equipment height is reduced, and the requirement on the height size of a factory building is reduced; and have a plurality of locking limit structure, can guarantee the safe operation of clapper die spotting press.
Claims (10)
1. The utility model provides a punching press clapper die spotting press, includes lathe bed (1) and lower bolster (8), its characterized in that, the upper end horizontal slidable mounting of lathe bed (1) have lower bolster (8), the both sides of lathe bed (1) all vertically install a plurality of guide pillars (5), the top of lathe bed (1) both sides guide pillar (5) all install upper fixed plate (3), guide pillar (5) of homonymy go up and down to slide and be provided with direction well seat (4), direction well seat (4) of both sides are by installing lift cylinder (2) the drive of vertical setting on lathe bed (1) and carry out synchronous lift, are provided with turnover cope match-plate pattern (7) between the direction well seat (4) of both sides, install the rotary driving device (6) of drive cope match-plate pattern (7) upset on the direction well seat (4) of one side or both sides.
2. The stamping and die closing machine of claim 1, wherein: the lower template (8) is driven by a shifting-in and shifting-out mechanism (21) arranged in the machine body (1) to horizontally slide along guide rails on two sides of the upper end of the machine body (1).
3. The stamping and die closing machine of claim 1, wherein: the guide middle seat (4) is driven to lift by two lifting oil cylinders (2) on two sides of the guide middle seat.
4. The stamping and die closing machine of claim 1, wherein: the direction in seat (4) link to each other through connecting circle axle (11) and rotatory backup pad (13) of cope match-plate pattern (7) both sides, rotary driving device (6) and the connection circle axle (11) axial connection of one side, the outside of connection circle axle (11) and direction in seat (4) between cup jointed a plurality of bearing (12).
5. The stamping and die closing machine of claim 4, wherein: seat (4) upper end is installed in one of them direction and is gone up template upset stop gear (9), cope match-plate pattern upset stop gear (9) including installing installation base (94) in seat (4) upper end in the direction, installation base (94) upside one end that is close to cope match-plate pattern (7) be provided with deflector (92), first lock cylinder or hydro-cylinder (91) are installed to the other end, the extension bar of first lock cylinder or hydro-cylinder (91) link to each other with first lock axle (93) that pass deflector (92), rotatory backup pad (13) on be close to one side at the cope match-plate pattern (7) back and open and have spacing groove (14), first lock axle (93) insert in spacing groove (14) when cope match-plate pattern (7) rotatory reseing runs into mechanical backer (95) of seat (4) one side in the direction.
6. The press clapper die spotting press of claim 3 or 5, wherein: a lifting locking plate (15) which upwards penetrates through the upper fixing plate (3) is vertically arranged on the other guide middle seat (4), a second locking cylinder or oil cylinder (18) is arranged on the lower side of the upper fixing plate (3), a plurality of inserting holes are uniformly formed in the lifting locking plate (15), and an extension rod of the second locking cylinder or oil cylinder (18) is connected with a second locking shaft (19) which penetrates through any one inserting hole.
7. The stamping and die closing machine of claim 6, wherein: the lower extreme of upper fixed plate (3) be provided with and be located lift locking plate (15) both sides supplementary latch segment (16), second latch shaft (19) pass two supplementary latch segments (16) and lift locking plate (15) simultaneously when locking.
8. The stamping and die closing machine of claim 1, wherein: the two sides of the guide middle seat (4) are connected with a pair of lifting connecting plates (10) which vertically extend upwards side by side, and the extension rod of the lifting oil cylinder (2) is located between the lifting connecting plates (10) which are arranged side by side and connected with the lifting connecting plates (10).
9. The stamping and die closing machine of claim 1, wherein: the upper template (7) is a magnetic template or a common template.
10. The stamping and die closing machine of claim 1, wherein: the epicoele of lift cylinder (2) lead to the air or connect power oil, the cavity of resorption of lift cylinder (2) through auxiliary oil tank (20) oil extraction to main oil tank again, auxiliary oil tank (20) are installed in cavity of resorption one side of lift cylinder (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911111559.0A CN110978608B (en) | 2019-11-14 | 2019-11-14 | Stamping die spotting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911111559.0A CN110978608B (en) | 2019-11-14 | 2019-11-14 | Stamping die spotting machine |
Publications (2)
| Publication Number | Publication Date |
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| CN110978608A true CN110978608A (en) | 2020-04-10 |
| CN110978608B CN110978608B (en) | 2021-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911111559.0A Active CN110978608B (en) | 2019-11-14 | 2019-11-14 | Stamping die spotting machine |
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| Country | Link |
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| CN (1) | CN110978608B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113459580A (en) * | 2021-07-13 | 2021-10-01 | 靖江市天昊模具科技有限公司 | Mold for producing high-temperature heat shield of vehicle engine compartment |
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| CN201329483Y (en) * | 2008-12-29 | 2009-10-21 | 吴武训 | Two-beam four-column closing device |
| CN201361656Y (en) * | 2009-03-06 | 2009-12-16 | 东莞市耐斯机械制造有限公司 | Multifunctional stretching die spotting machine |
| CN203622710U (en) * | 2013-11-12 | 2014-06-04 | 宁波顺兴机械制造有限公司 | Novel mould closing device of mould closing machine |
| CN205739321U (en) * | 2016-04-30 | 2016-11-30 | 南安辰光日用化工品有限公司 | A kind of rotary position-limit mechanism |
| CN107127912A (en) * | 2017-06-08 | 2017-09-05 | 宁波顺兴开浩精工机械有限公司 | A kind of high-precision clapper die spotting press |
| CN207120394U (en) * | 2017-05-22 | 2018-03-20 | 成都富维安道拓汽车饰件***有限公司 | A kind of mould turning-over |
| CN208263363U (en) * | 2018-03-27 | 2018-12-21 | 昆山深凯模具有限公司 | A kind of mold closing mechanism |
| KR101939185B1 (en) * | 2017-01-02 | 2019-01-16 | 김은기 | Manufacturing Machine For Multi-Layer Disc |
| CN109940223A (en) * | 2017-12-21 | 2019-06-28 | 宁波顺兴机械制造有限公司 | A kind of middle seat fall arrest lockable mechanism of bead cutter |
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2019
- 2019-11-14 CN CN201911111559.0A patent/CN110978608B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201329483Y (en) * | 2008-12-29 | 2009-10-21 | 吴武训 | Two-beam four-column closing device |
| CN201361656Y (en) * | 2009-03-06 | 2009-12-16 | 东莞市耐斯机械制造有限公司 | Multifunctional stretching die spotting machine |
| CN203622710U (en) * | 2013-11-12 | 2014-06-04 | 宁波顺兴机械制造有限公司 | Novel mould closing device of mould closing machine |
| CN205739321U (en) * | 2016-04-30 | 2016-11-30 | 南安辰光日用化工品有限公司 | A kind of rotary position-limit mechanism |
| KR101939185B1 (en) * | 2017-01-02 | 2019-01-16 | 김은기 | Manufacturing Machine For Multi-Layer Disc |
| CN207120394U (en) * | 2017-05-22 | 2018-03-20 | 成都富维安道拓汽车饰件***有限公司 | A kind of mould turning-over |
| CN107127912A (en) * | 2017-06-08 | 2017-09-05 | 宁波顺兴开浩精工机械有限公司 | A kind of high-precision clapper die spotting press |
| CN109940223A (en) * | 2017-12-21 | 2019-06-28 | 宁波顺兴机械制造有限公司 | A kind of middle seat fall arrest lockable mechanism of bead cutter |
| CN208263363U (en) * | 2018-03-27 | 2018-12-21 | 昆山深凯模具有限公司 | A kind of mold closing mechanism |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113459580A (en) * | 2021-07-13 | 2021-10-01 | 靖江市天昊模具科技有限公司 | Mold for producing high-temperature heat shield of vehicle engine compartment |
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| CN110978608B (en) | 2021-12-28 |
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