CN219520210U - Forming die for double-drum-bag structure at end part of cooling water pipe of engine - Google Patents
Forming die for double-drum-bag structure at end part of cooling water pipe of engine Download PDFInfo
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- CN219520210U CN219520210U CN202320103643.3U CN202320103643U CN219520210U CN 219520210 U CN219520210 U CN 219520210U CN 202320103643 U CN202320103643 U CN 202320103643U CN 219520210 U CN219520210 U CN 219520210U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The utility model relates to a forming die of a double-drum structure at the end part of an engine cooling water pipe, which is used for processing and manufacturing the double-drum structure at the end part of the cooling water pipe and comprises a clamping die, an auxiliary clamping die holder, an auxiliary clamping die and a stamping die, wherein: the clamping die, the auxiliary clamping die seat and the auxiliary clamping die are all of a bilateral symmetry structure, and the cooling water pipe is fixed in the groove in the clamping die; the external dimension of the auxiliary clamping die is matched with the internal groove dimension of the auxiliary clamping die holder, and the auxiliary clamping die holder is installed and fixed in the auxiliary clamping die holder; the inner side of the auxiliary clamping die is provided with a groove matched with the double-drum bag structure; the die consists of four separate die assemblies: the die I, the die II, the die III and the die IV. In the utility model, the double-drum structure at the end part of the cooling water pipe can be formed at one time by using the forming die, so that the production process and the cost are reduced; the steel pipe integrated forming technology is adopted to replace the original welding technology, so that the breakage and failure caused by welding are avoided; the mold parts are designed symmetrically left and right, so that the assembly and disassembly and the replacement of the mold assembly during faults are facilitated.
Description
Technical Field
The utility model relates to the technical field of engine cooling water pipe machining, in particular to a forming die of a double-drum-pack structure at the end part of an engine cooling water pipe.
Background
Engine cooling water pipes are an important component of an engine cooling system. The end part of the cooling water pipe is provided with a double-drum structure which is used for sealing the port of the cooling water pipe, and the sealing of the port of the water pipe is mainly finished by sleeving an O-shaped ring in a double-drum groove between the double-drum structures and inserting the O-shaped ring into a butt joint hole. The traditional double-bulge structure at the end part of the cooling water pipe is generally machined and then connected with the cooling water pipe by welding; the method has the advantages of multiple production procedures, high production cost, high technical requirements for welding personnel, easy leakage at the welding position and potential safety hazard.
Disclosure of Invention
In order to solve the defects in the prior art, the utility model provides a forming die with a double-bulge structure at the end part of a movable cooling water pipe.
The double-bulge structure forming die comprises a clamping die, an auxiliary clamping die seat, an auxiliary clamping die and a stamping die, wherein the clamping die is used for clamping the cooling water pipe end part of the engine; wherein:
the clamping die, the auxiliary clamping die seat and the auxiliary clamping die are of a bilateral symmetry structure, and the cooling water pipe is fixed in the groove inside the clamping die;
the external dimension of the auxiliary clamping die is matched with the internal groove dimension of the auxiliary clamping die holder, and the auxiliary clamping die holder is installed and fixed in the auxiliary clamping die holder;
the inner side of the auxiliary clamping die is provided with a groove matched with the double-drum bag structure;
the die consists of four separate die assemblies: a first die, a second die, a third die and a fourth die, each die assembly consisting of a die body, a core and a threaded end, wherein:
the inner side of the front end of the die main body of the die I is provided with a die I step, and the shape and the size of the die I step are matched with those of the bulge I of the double-bulge structure; the lower half part of the punching core of the first punching die is provided with a lower edge end, a gap is arranged between the step of the first punching die and the lower edge end, and the width of the gap is matched with the thickness of the pipe wall of the cooling water pipe;
the punching core of the second punching die is in a double-layer cylindrical tower shape, and a buffer slope is arranged in the middle of the punching core;
and a 45-degree bevel angle is arranged on the inner side of the front end of the die main body of the die III.
According to the utility model, the left end and the right end of the clamping die are provided with the mounting grooves, and the clamping die is mounted in the die holder die groove of the end forming device through the mounting grooves.
According to the utility model, the rear end of the inner side of the auxiliary clamping die holder is designed into a circular ring end face, grooves and steps are respectively formed on the circular ring end face, the inner side wall of the auxiliary clamping die holder and the inner side wall of the rear end of the auxiliary clamping die holder, the grooves are matched with the auxiliary clamping die in size, and the circular ring end face is provided with an alignment mounting hole site.
Further, a first groove, a second groove and a boss positioned between the first groove and the second groove are arranged on the inner side of the auxiliary clamping die, and the structural dimensions of the auxiliary clamping die are respectively matched with the first bulge, the second bulge and the double bulge grooves in the double bulge structure.
Further, the front end of the inner side of the auxiliary clamping die is provided with a circular ring end face; the rear end of the auxiliary clamping die is provided with a step, and the size of the step is matched with that of the auxiliary clamping die holder; in addition, the auxiliary clamping die is provided with an alignment mounting hole site, the alignment mounting hole site is matched with an alignment mounting hole site of the auxiliary clamping die holder, and the auxiliary clamping die holder is fixed through the alignment mounting hole site by using a bolt.
According to the utility model, the punching core and the threaded end are respectively positioned at the head part and the tail part of the punching die, a cylindrical groove is arranged at the upper part of the punching die main body, and the punching core is nested in the cylindrical groove.
Further, the center of the die main body and the center of the die core are provided with alignment through holes; the front end of the die main body is a flat end surface; the threaded end is connected with the oil cylinder and used for controlling the advancing and retreating of the stamping die.
Further, the die main body and the die core of the die IV adopt a split structure.
Compared with the prior art, the utility model has the following beneficial effects:
(1) The double-drum-structure forming die can realize the integral forming of the steel pipe, reduce the production process and the cost and improve the production efficiency;
(2) The steel pipe integrated forming technology is adopted to replace the original welding technology, so that the breakage and failure caused by welding are avoided;
(3) The installation method of each part of the die is simple, adopts a bilateral symmetrical design, and is convenient for assembling and disassembling and replacing the die parts in case of failure.
Drawings
Fig. 1 is a schematic view of the structure of an engine cooling water pipe 1 according to the present utility model.
Fig. 2 is a schematic structural view of the dual drum structure of the present utility model.
Fig. 3 is a three-dimensional view of the dual drum structure of the present utility model.
Fig. 4 is a schematic structural view of a dual drum structure forming mold of the present utility model.
Fig. 5 is a schematic structural view of the clamping die 2 of the present utility model.
Fig. 6 is a schematic structural view of the auxiliary clamping die holder 3 of the present utility model.
Fig. 7 is a schematic structural view of the auxiliary clamping die 4 of the present utility model.
Fig. 8 is a schematic diagram of the matching of the secondary clamping die 4 with the double-drum structure of the present utility model.
Fig. 9 is a schematic structural view of the die 5 of the present utility model.
Fig. 10 is a cross-sectional view of the die 5 of the present utility model.
Fig. 11 is a partial enlarged view of the die 5 of the present utility model.
FIG. 12 is a schematic diagram of four forming of a dual drum structure according to the present utility model.
In the figure:
1-starting a cooling water pipe; 11-bulge one, 111-bulge one up-slope, 112-bulge down-slope; 12-bulge II; 121-bulge second downward slope; 122-flat end face; 13-a double drum ladle; 14-preforming the projections; 15-closing in;
2-clamping the mold; 21-grooves; 22-mounting slots;
3-an auxiliary clamping die holder; 31-the end face of the circular ring; 32-grooves; 33-steps; 34-aligning the mounting hole site;
4-auxiliary clamping die; 41-groove one; 42-groove II; 43-boss; 44-an annular end face; 45-steps; 46-aligning the mounting hole site;
5-stamping die;
51-first die; 511-a die-body; 512-first punching; 513-threaded end; 514-aligning the through holes; 515-die one step; 516—lower edge; 517-gap; 518-flat end faces;
52-a second die; 521-a second die body; 522-punching a second core; 523-threaded end; 524-alignment vias; 525-a second die ramp; 526-a flat end face;
53-a third die; 531-die three body; 532-punching core III; 533-threaded end; 534-aligning the through holes; 535-die triple bevel; 536—a flat end face;
54-a fourth die; 541-die four body; 542-core fourth; 543-threaded end; 544-alignment through holes, 545-flat end faces.
Detailed Description
The technical scheme of the utility model is clearly and completely described in the following by specific embodiments with reference to the accompanying drawings. It should be understood that the described embodiments are merely illustrative of the technical solution of the present utility model and are not intended to limit the scope of the present utility model. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated.
The utility model relates to a double-drum-pack structure forming die which is used for manufacturing an end part double-drum-pack structure of an engine cooling water pipe. As shown in fig. 1 to 3, the double-bulge structure is disposed at the end of the cooling water pipe 1 of the engine, and includes two bulge structures, namely a bulge 11 and a bulge 12, which are annular bulges, and a double-bulge groove 13 between the bulge 11 and the bulge 12. Wherein, the upper part and the lower part of the bulge I11 are respectively provided with an upper slope 111 and a lower slope 112, and the lower slope 112 has a larger size than the upper slope 111; the lower part of the bulge II 12 is provided with a slope 121 symmetrical to the upper slope 111 of the bulge I, and the upper part of the bulge II is a flat end surface 122; the upper part of the symmetrical bulge I and the lower part of the bulge II form the double bulge groove 13 with the outer wall plane of the water pipe between the double bulges; the external dimension of the double-drum-packed groove 13 is matched with the O-shaped ring, and the sealing of the end part of the engine cooling water pipe is realized by sleeving the O-shaped ring into the double-drum-packed groove 13 and inserting the O-shaped ring into the butt joint hole.
As shown in fig. 4, the forming die for the double-bulge structure of the end part of the cooling water pipe of the engine comprises a clamping die 2, a secondary clamping die holder 3, a secondary clamping die 4 and a stamping die 5. Wherein: the clamping die 2, the auxiliary clamping die holder 3 and the auxiliary clamping die 4 are all of a bilateral symmetry structure, when the pipe end of the cooling water pipe is formed, the main body of the cooling water pipe 1 is fixed in a groove in the clamping die 2, and the pipe end is positioned outside the clamping die 2; the external dimension of the auxiliary clamping die 4 is matched with the internal groove dimension of the auxiliary clamping die holder 3, and is installed and fixed in the auxiliary clamping die holder 3; the inner side of the auxiliary clamping die 4 is provided with a groove matched with the double-drum structure, and the size of the double-drum structure at the end part of the water pipe is ensured during molding; the die 5 is composed of four separate die assemblies for machining the ends of the cooling water pipe 1 to form a desired double-drum structure.
As shown in fig. 5, a groove 21 matched with the cooling water pipe 1 body is arranged inside the clamping die 2 for firmly clamping the cooling water pipe 1; the left end and the right end of the clamping die 2 are provided with mounting grooves 22, the clamping die 2 is mounted in a die holder die groove of end forming equipment through the mounting grooves 22, and the die holder is connected with a die holder cylinder and used for controlling the opening and closing of the clamping die 2.
As shown in fig. 6, the rear end of the inner side of the auxiliary clamping die holder 3 is designed into a circular ring end face 31, and the circular ring end face 31, the inner side wall of the auxiliary clamping die holder and the inner side wall of the rear end of the auxiliary clamping die holder form a groove 32 and a step 33 respectively, wherein the groove 32 is matched with the auxiliary clamping die 4 in size; the annular end face 31 is provided with a positioning mounting hole 34.
As shown in fig. 7 to 8, the inner side of the auxiliary clamping die 4 is provided with a first groove 41, a second groove 42 and a boss 43 positioned between the first groove 41 and the second groove 42, the structural dimensions of the boss are respectively matched with the first bulge 11, the second bulge 12 and the double bulge groove 13 in the double bulge structure, and the boss is used for ensuring the shape and the dimension of the double bulge structure at the end part of the water pipe during forming and playing a role in stabilizing and clamping; in addition, the front end of the inner side of the auxiliary clamping die 4 is provided with a circular ring end surface 44, and the circular ring end surface 44 is contacted with the flat end surface of the stamping die 5 and is used for limiting the advance of the stamping die 5, so that the accuracy of forming the double-drum-bag structure can be ensured; the rear end of the auxiliary clamping die 4 is provided with a step 45, the size of the step 45 is matched with the step 33 at the rear end of the auxiliary clamping die holder 3, and the auxiliary clamping die 4 and the auxiliary clamping die holder 3 are used for limiting and mounting; the auxiliary clamping die 4 is provided with an alignment mounting hole site 46, the alignment mounting hole site 46 is matched with the alignment mounting hole site 34 of the auxiliary clamping die holder, and the auxiliary clamping die holder 3 is fixed through the alignment mounting hole site 46 by using bolts.
As shown in fig. 9 to 11, the die 5 is composed of four independent die assemblies, namely, a die one 51, a die two 52, a die three 53 and a die four 54. The first die 51 is composed of a first die body 511, a first die core 512 and a threaded end 513, wherein the first die core 512 and the threaded end 513 are respectively positioned at the head and the tail of the first die 51, the first die body 511 and the first die core 512 are cylindrical, a cylindrical groove is formed in the upper part of the first die body 511, and the first die core 512 is nested in the cylindrical groove; the center of the die body 511 and the center of the die core 512 are provided with alignment through holes 514, and the alignment through holes 514 are used for ensuring the accuracy of the installation position; in addition, a die step 515 is provided inside the front end of the die body 511, and the shape and size of the die step 515 are matched with those of the bulge 11 of the double-bulge structure, so as to ensure accurate molding of the bulge 11; the first core 512 is used to ensure that the water tube wall will not dent during the first bulge forming; the lower half part of the first punching core 512 is provided with a lower edge 516, and the lower edge 516 is used for extruding the end part of the cooling water pipe 1 when the lower edge 516 contacts with the port of the cooling water pipe 1, so as to provide conditions for the formation of the first bulge 11; a gap 517 is arranged between the first die step 515 and the lower edge 516, and the width of the gap 517 is matched with the thickness of the pipe wall of the cooling water pipe 1, so that the first die 512 can be allowed to move along the inner side of the pipe end of the cooling water pipe 1; the front end of the first die body 511 is a flat end face 518, and the flat end face 518 contacts with the annular end face 44 of the auxiliary clamping die 4 to limit the movement of the first die 51; the threaded end 513 is coupled to a ram for controlling the advancement and retraction of the die one 51.
Similarly, the second die 52 is composed of a second die body 521, a second die core 522 and a threaded end 523, and the centers of the second die body 521 and the second die core 522 are provided with an alignment through hole 524; the second punching core 522 is in a double-layer cylindrical tower shape, and a buffer slope 525 is arranged in the middle of the second punching core 522 and used for preforming the second bulge 12 with the double-bulge structure, so that the forming force of the second bulge can be reduced, and the deformation of the first bulge 11 caused by the forming of the second bulge 12 can be effectively avoided; the front end of the second die main body 521 is a flat end surface 526 for limiting the movement of the second die 52; the threaded end 523 is connected to a cylinder for controlling the advance and retreat of the die two 52.
Similarly, the third die 53 is composed of a third die body 531, a third die core 532 and a threaded end 533, and the centers of the third die body 531 and the third die core 532 are provided with an alignment through hole 534; wherein, the inner side of the front end of the die three main body 531 is provided with a 45-degree bevel angle 535, the bevel angle 535 is used for playing a binding-up role when the bulge II 12 is formed, avoiding the error forming of the bulge II 12 and reducing the forming force of the secondary bulge; the punching core III 532 is used for supporting the bulge II 12 during forming, so that the outer diameter of the groove between the bulge I11 and the bulge II 12 is prevented from being sunken during forming the bulge II 12; the front end of the die three main body 531 is a flat end surface 536 for limiting the movement of the die three 53; the threaded end 533 is connected to a cylinder for controlling the advance and retreat of the third die 53.
Similarly, the fourth die 54 is composed of a fourth die body 541, a fourth die 542, and a threaded end 543, and the fourth die body 541, the fourth die 542 are centrally provided with an alignment through hole 544; the four main body 541 and the four core 542 are in split structure, so that the four core 542 can be quickly replaced when worn, and the production cost and the working time are saved; the size of the fourth punch 542 is slightly larger than that of the third punch 532, and the fourth punch is used for supporting the second punch when the second bulge 12 is formed, so that the outer diameter of a groove between the first bulge 11 and the second bulge 12 is prevented from being sunken when the second bulge 12 is formed; the upper part of the die four main body 541 is a flat end surface 545 for limiting the movement of the die four 54; simultaneously forming a flat end face 122 of the bulge II 12; the threaded end 543 is connected to the cylinder for controlling the advance and retreat of the fourth die 54.
As shown in fig. 12, the working principle of the double-drum structure forming mold of the present utility model is as follows: when the forming die works, the main body of the cooling water pipe 1 is firstly put into the groove 21 of the clamping die 2, then the clamping die 2 is clamped, then the first stamping die 51 moves forward, the first stamping core 512 moves along the inner side of the water pipe 1, when the port of the cooling water pipe 1 is contacted with the lower edge 516 of the first stamping core, the end part of the cooling water pipe 1 is extruded, the steel pipe material can only flow to the step 515 of the first stamping core, and meanwhile, the first stamping core 512 supports the inner wall of the steel pipe at the end part of the cooling water pipe 1, so that the inner wall of the steel pipe is prevented from being inwards concave, and the bulge 11 is formed; the first die 51 is then retracted to complete the formation of the bulge 11.
Then the auxiliary clamping die 4 is clamped, then the second die 52 is advanced, the outer wall of the second die 522 moves along the inner side of the water pipe 1, and as the second die 522 is in a double-layer cylindrical tower shape and the middle part of the second die is provided with a slope 525, the steel pipe material at the end part of the cooling water pipe 1 is supported, and meanwhile, the upper part of the second die 522 supports the inner wall of the steel pipe between the bulge 11 and the bulge 12, so that the inner wall of the steel pipe is ensured not to be concave inwards, and a preformed bulge 14 of the bulge II is formed; in addition, the two end faces 526 of the die are contacted with the annular end face 44 of the auxiliary clamping die 4, so that the movement of the second die 52 is limited, and the accuracy of the forming position of the second bulge 12 is ensured; the second die 52 is then retracted to complete the first preform of the bulge 12.
Then the third stamping die 53 advances, under the action of the 45-degree oblique angle 535 at the inner side of the third stamping die main body 531, the port of the cooling water pipe 1 forms a 45-degree closing-in 15, and meanwhile, the third stamping core 532 supports the inner wall of the steel pipe between the first bulge 11 and the second bulge 12, so that the inner wall of the steel pipe is prevented from being concave; the third die 53 is then retracted, completing a second preform of the bulge two 12.
Then the third punch 53 retreats, the fourth punch 54 advances, the flat end surface 545 on the upper part of the fourth punch 541 is attached to the annular end surface 44 of the auxiliary clamping die 4 to form the flat end surface 122 of the second bulge 12, and the fourth punch 542 supports the inner wall of the steel pipe between the first bulge 11 and the second bulge 12, so that the inner wall of the steel pipe is ensured not to be concave; the fourth die 54 is then retracted to complete the formation of the bulge two 12. Thus, the whole processing and forming process of the double-drum structure is finished, and the next process is started.
The clamping die 2 is connected with a clamping die holder oil cylinder through a clamping die holder and used for controlling the opening and closing of the clamping die 2; the auxiliary clamping die holder 3 is connected with an auxiliary clamping die holder oil cylinder and used for controlling the opening and closing of the auxiliary clamping die 4; four independent die assemblies of the die 5 are respectively arranged in a die groove of a main oil cylinder of the end forming equipment through threaded ends, and the main oil cylinder can independently control the advance and the retreat of a first die 51, a second die 52, a third die 53 and a fourth die 54.
The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.
Claims (10)
1. A double-bulge structure forming die for processing and manufacturing the end part of a cooling water pipe of an engine is provided, which is arranged at the end part of the cooling water pipe of the engine and comprises two bulge structures, namely a bulge I and a bulge II which are annular bulges, and a double-bulge groove positioned between the bulge I and the bulge II,
the forming die is characterized by comprising a clamping die, an auxiliary clamping die holder, an auxiliary clamping die and a stamping die; wherein:
the clamping die, the auxiliary clamping die seat and the auxiliary clamping die are of a bilateral symmetry structure, and the cooling water pipe is fixed in the groove inside the clamping die;
the external dimension of the auxiliary clamping die is matched with the internal groove dimension of the auxiliary clamping die holder, and the auxiliary clamping die holder is installed and fixed in the auxiliary clamping die holder;
the inner side of the auxiliary clamping die is provided with a groove matched with the double-drum bag structure;
the die consists of four separate die assemblies: a first die, a second die, a third die and a fourth die, each die assembly consisting of a die body, a core and a threaded end, wherein:
the inner side of the front end of the die main body of the die I is provided with a die I step, and the shape and the size of the die I step are matched with those of the bulge I of the double-bulge structure; the lower half part of the punching core of the first punching die is provided with a lower edge end, a gap is arranged between the step of the first punching die and the lower edge end, and the width of the gap is matched with the thickness of the pipe wall of the cooling water pipe;
the punching core of the second punching die is in a double-layer cylindrical tower shape, and a buffer slope is arranged in the middle of the punching core;
and a 45-degree bevel angle is arranged on the inner side of the front end of the die main body of the die III.
2. The double-drum-pack structure forming die according to claim 1, wherein mounting grooves are formed in the left end and the right end of the clamping die, and the clamping die is mounted in a die holder die groove of the end forming device through the mounting grooves.
3. The double-drum-pack structure forming die according to claim 1, wherein the rear end of the inner side of the auxiliary clamping die holder is designed into a circular ring end face, grooves and steps are formed on the circular ring end face, the inner side wall of the auxiliary clamping die holder and the inner side wall of the rear end of the auxiliary clamping die holder respectively, the grooves are matched with the auxiliary clamping die in size, and alignment mounting holes are formed on the circular ring end face.
4. A dual-bulge forming die according to claim 3, wherein the inner side of the auxiliary clamping die is provided with a first groove, a second groove and a boss arranged between the first groove and the second groove, and the structural dimensions of the first groove, the second groove and the boss are respectively matched with the bulge first, the bulge second and the dual-bulge groove in the dual-bulge structure.
5. The dual drum kit structure forming mold according to claim 4, wherein the front end of the inner side of the auxiliary clamping mold is provided with a circular ring end surface.
6. The dual drum kit structure forming mold according to claim 4, wherein the rear end of the auxiliary clamping mold is provided with a step, and the step is matched with the step of the auxiliary clamping mold base in size.
7. The dual drum kit structure forming mold according to claim 4, wherein the auxiliary clamping mold is provided with an alignment mounting hole site, the alignment mounting hole site is matched with an alignment mounting hole of the auxiliary clamping mold base, and the auxiliary clamping mold base is fixed by using bolts through the alignment mounting hole site.
8. The dual drum structure forming die of claim 1, wherein the punch and the threaded end are located at the head and tail of the die, respectively, and a cylindrical recess is provided in the upper portion of the die body, and the punch is nested in the cylindrical recess.
9. The double-drum structure forming die according to claim 8, wherein the die main body and the core center are provided with alignment through holes; the front end of the die main body is a flat end surface; the threaded end is connected with the oil cylinder and used for controlling the advancing and retreating of the stamping die.
10. The dual drum structure forming die of claim 8, wherein the die body and the core of the die four are of a split structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320103643.3U CN219520210U (en) | 2023-02-03 | 2023-02-03 | Forming die for double-drum-bag structure at end part of cooling water pipe of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320103643.3U CN219520210U (en) | 2023-02-03 | 2023-02-03 | Forming die for double-drum-bag structure at end part of cooling water pipe of engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219520210U true CN219520210U (en) | 2023-08-15 |
Family
ID=87635277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320103643.3U Active CN219520210U (en) | 2023-02-03 | 2023-02-03 | Forming die for double-drum-bag structure at end part of cooling water pipe of engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219520210U (en) |
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2023
- 2023-02-03 CN CN202320103643.3U patent/CN219520210U/en active Active
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