CN112846673B - Metal piece production device and process - Google Patents
Metal piece production device and process Download PDFInfo
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- CN112846673B CN112846673B CN202110288764.5A CN202110288764A CN112846673B CN 112846673 B CN112846673 B CN 112846673B CN 202110288764 A CN202110288764 A CN 202110288764A CN 112846673 B CN112846673 B CN 112846673B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 42
- 239000002184 metal Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title description 11
- 230000008569 process Effects 0.000 title description 10
- 230000007246 mechanism Effects 0.000 claims abstract description 25
- 238000004080 punching Methods 0.000 claims abstract description 17
- 238000003825 pressing Methods 0.000 claims description 28
- 238000000465 moulding Methods 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000000047 product Substances 0.000 description 15
- 238000005553 drilling Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000003754 machining Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- 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
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Abstract
The invention discloses a metal piece production device, which comprises a blank forming die and a punching mechanism, wherein the blank forming die comprises an upper die and a lower die, the punching mechanism comprises a bottom plate and a rectangular block, the right end of a piston rod of an electric cylinder is provided with a moving plate through a bolt, the middle part of the right side wall of the moving plate is provided with a motor through a bolt, the right end of an output shaft of the motor is provided with an output connecting rod through a coupler, the left side and the right side of the inside of the rectangular block are provided with rectangular through holes, the bottom of the rectangular block is provided with a circular through hole, and the bottom of the rectangular block is welded on the right side of the top of the bottom plate through an inclined support plate; the blank is manufactured by the blank forming die through the metal piece production device and the metal piece production process, and then the blank is perforated by the perforating mechanism to manufacture the double-lug hinge finished product, so that the manufacturing process is greatly reduced, the production efficiency of the double-lug hinge finished product is improved, and the quality of the double-lug hinge finished product is greatly improved.
Description
Technical Field
The invention relates to the technical field of metal piece production devices, in particular to a metal piece production device, and more particularly provides a metal piece production process.
Background
The production process of the machine refers to the whole process of making a product from raw materials (or semi-finished products). The machine production comprises the contents of raw material transportation and preservation, production preparation, blank manufacture, part processing and heat treatment, product assembly and debugging, paint and packaging and the like. The content of the production process is quite wide, and modern enterprises organize and guide the production by using the principles and methods of system engineering, and the production process is regarded as a production system with input and output.
In the production process, the process of changing the shape, size, position, property and the like of the production object into a finished product or a semi-finished product is called a technological process. It is an essential part of the production process. The process may be divided into casting, forging, stamping, welding, machining, assembling, etc., and the machining process generally refers to the sum of the machining process of the part and the assembling process of the machine, and other processes are called auxiliary processes, such as transportation, storage, power supply, equipment maintenance, etc. The technological process consists of one or several sequential steps.
When producing the double-lug hinge, the traditional machining device is complex in operation, so that the production efficiency is low, the double-lug hinge is easy to deform, and the manufacturing quality is low.
Disclosure of Invention
(1) Technical problem to be solved
The invention aims to overcome the defects of the prior art, adapt to the actual needs, and provide a metal piece production device and a metal piece production process so as to solve the problems in the background art.
(2) Technical proposal
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
a metal piece production device comprises a blank forming die and an opening mechanism;
the blank forming die comprises an upper die and a lower die, wherein a core is integrally formed in the middle of the bottom of the upper die, a groove is formed in the top of the lower die, the core and the groove form a forming cavity, the shape of the forming cavity is identical to that of a double-lug hinge, a feeding hole is formed in a base body of the upper die, the feeding hole is communicated with the forming cavity, a blank is manufactured through the blank forming die, and the blank comprises a U-shaped plate and a round rod;
the drilling mechanism comprises a bottom plate and rectangular blocks, wherein a positioning plate is welded on the left side of the top of the bottom plate, an electric cylinder is installed in the middle of the right side wall of the positioning plate through bolts, a moving plate is installed at the right end of a piston rod of the electric cylinder through bolts, a motor is installed in the middle of the right side wall of the moving plate through bolts, an output connecting rod is installed at the right end of an output shaft of the motor through a coupling, a drill rod is installed at the right end of the output connecting rod, two rectangular slots are at least equidistantly formed in the right side wall of the output connecting rod, rectangular inserting rods are integrally formed in the left end of the drill rod and inserted into the rectangular slots, the rectangular inserting rods are fixedly connected with the output connecting rod through bolts, rectangular through holes are formed in the left side and the right side of the inside of the rectangular blocks, round through holes are formed in the bottom of the rectangular blocks, and the bottom of the rectangular blocks are welded on the right side of the top of the bottom plate through inclined support plates;
the punching mechanism further comprises a pressing mechanism, the pressing mechanism comprises a limiting cylinder, the limiting cylinder is welded on the right side of the top of the bottom plate, the outer wall of the top of the limiting cylinder is welded with the inner wall of the inner ring of the wear-resistant bearing, a top plate is welded on the outer wall of the wear-resistant bearing and located below the top plate, a pressing plate is sleeved outside the limiting cylinder in a movable mode, a telescopic pipe is installed between the pressing plate and the top plate, an outer pipe sleeve inner pipe is arranged in the telescopic pipe, a spring is arranged in the telescopic pipe, the upper end and the lower end of the spring are respectively propped against the bottom of the top plate and the top of the pressing plate, and a limiting plate is welded on the outer wall of the limiting cylinder and located below the pressing plate.
Further, two oblique extension boards are equipped with about, about two oblique extension boards weld the left and right sides of the bottom of rectangle piece, oblique extension boards are outside slope setting, the bottom of rectangle piece is equipped with and connects the silo, connect the silo to be located about two between the oblique extension board.
Further, a riser is arranged on the base body of the upper die, and the riser is positioned on the right side of the feeding hole; the horn-shaped feeding pipe is arranged at the feeding port.
Further, a limit bearing is sleeved outside the drill rod, limit connecting rods are welded at the top and the bottom of an outer ring of the limit bearing, and the left end of each limit connecting rod is welded with the right side wall of the movable plate.
Further, the tops of the rectangular blocks between the left rectangular through hole and the right rectangular through hole are arc-shaped protrusions.
Further, a limit round rod is transversely movably mounted on the base body of the positioning plate, and the right end of the limit round rod is connected with the left side wall of the moving plate.
Further, the spacing round bar equidistance is equipped with four at least, the external screw thread has been seted up to the right-hand member outer wall of spacing round bar, the screw hole has been seted up to the left side wall of movable plate, the right-hand member of spacing round bar passes through threaded connection and installs the inside of screw hole.
Further, the bottom four corners of movable plate all have the gyro wheel through the mounting bracket roll-mounting.
Further, arc handles are welded at the middle parts of the outer walls of the front side and the rear side of the receiving groove.
The invention also provides a metal piece production process, which comprises the following steps:
step one: adding molten metal into the molding cavity through a charging port;
step two: after the molten metal is cooled and molded, taking out the blank, respectively inserting the left side and the right side of the U-shaped plate of the blank into the left rectangular through holes and the right rectangular through holes, and then rotating the top plate and the pressing plate to press the pressing plate above the blank;
step three: the motor is started to drive the drill rod to rotate, and meanwhile, the motor is started to drive the moving plate, the motor and the drill rod to move rightwards, the drill rod penetrates through the round through hole, the drill rod penetrates through the blank piece to form a hole, and the blank piece is manufactured into a double-lug hinge finished product;
step four: the control electric cylinder drives the moving plate, the motor and the drill rod to move leftwards, so that the moving plate, the motor and the drill rod are restored to the original positions, and then the double-lug hinge finished product is taken out;
step five: and taking out the finished product of the double-lug hinge and polishing.
(3) The beneficial effects are that:
1. the blank is manufactured by the blank forming die, and then the blank is perforated by the perforating mechanism to manufacture the double-lug hinge finished product, so that the manufacturing process is greatly reduced, and the production efficiency of the double-lug hinge finished product is improved.
2. When punching the blank, the left and right sides of the U-shaped plate are respectively inserted into the left and right rectangular through holes, so that the protection of the U-shaped plate is improved, the U-shaped plate is prevented from deforming when punching the U-shaped plate, and the quality of the double-lug hinge finished product is greatly improved.
3. Through the effect of spacing bearing, improved the stability of drilling rod when rotatory, improved the precision of punching.
4. Through the effect of spacing round bar, reduced the rocking of movable plate when controlling the removal, improved the precision of punching.
5. Through when punching the blank, rotatory roof and clamp plate make the clamp plate press in the top of blank, improved the spacing to the blank, further improved the punching accuracy.
6. Make things convenient for the dismouting of drilling rod through dismouting screw rod, make things convenient for the dismouting and the change of drilling rod.
Drawings
FIG. 1 is a front view in section of a blank-forming die of a metal piece production apparatus of the present invention;
FIG. 2 is a schematic structural view of a blank made by a blank-forming die;
FIG. 3 is a schematic structural view of an opening mechanism of the metal piece production device of the present invention;
FIG. 4 is a front view in section of the opening mechanism of the apparatus for producing metal parts according to the present invention;
fig. 5 is an enlarged view of a portion a in fig. 3;
FIG. 6 is a schematic view of the opening mechanism of the metal part production device of the present invention, which is a blank opening structure;
fig. 7 is a schematic structural view of a finished binaural hinge;
fig. 8 is an enlarged view of a portion B in fig. 4;
FIG. 9 is a schematic view of the structure of the punching mechanism of the apparatus for producing metal parts according to the present invention when the blank is not pressed by the pressing mechanism;
fig. 10 is an enlarged view of a portion C in fig. 4;
fig. 11 is an enlarged view of a portion D in fig. 4.
The reference numerals are as follows:
1. blank forming die; 11. an upper die; 111. a core; 112. a feed inlet; 113. a horn-shaped feeding tube; 114. riser; 12. a lower die; 121. molding a cavity; 21. a U-shaped plate; 22. a round bar; 23. a hole; 3. a bottom plate; 31. a positioning plate; 311. an electric cylinder; 312. a limit round rod; 32. a moving plate; 321. a motor; 3211. an output link; 32111. rectangular slots; 322. a drill rod; 32201. a rectangular insert rod; 32202. a screw; 3221. a limit bearing; 3222. a limit connecting rod; 323. a roller; 33. rectangular blocks; 331. rectangular through holes; 332. a circular through hole; 333. an inclined support plate; 334. a receiving groove; 3341. an arc-shaped handle; 34. a limit cylinder; 341. a wear-resistant bearing; 342. a top plate; 343. a pressing plate; 344. a limiting plate; 345. a spring; 346. and (5) a telescopic pipe.
Detailed Description
The invention is further illustrated by the following examples in connection with figures 1-11:
a metal piece production device comprises a blank forming die 1 and an opening mechanism;
as shown in fig. 1, 2, 9, 10 and 11, the blank forming die 1 includes an upper die 11 and a lower die 12, a core 111 is integrally formed in the middle of the bottom of the upper die 11, a groove is formed at the top of the lower die 12, the core 111 and the groove form a forming cavity 121, the shape of the forming cavity 121 is the same as that of a double-lug hinge, a charging hole 112 is formed in a base body of the upper die 11, the charging hole 112 is communicated with the forming cavity 121, and a blank is made by the blank forming die, and the blank includes a U-shaped plate 21 and a round rod 22;
as shown in fig. 3 and fig. 5, the hole opening mechanism includes a bottom plate 3 and a rectangular block 33, a positioning plate 31 is welded on the left side of the top of the bottom plate 3, an electric cylinder 311 is mounted in the middle of the right side wall of the positioning plate 31 through a bolt, a moving plate 32 is mounted in the right end of a piston rod of the electric cylinder 311 through a bolt, a motor 321 is mounted in the middle of the right side wall of the moving plate 32 through a bolt, an output connecting rod 3211 is mounted in the right end of an output shaft of the motor through a coupler, a drill rod 322 is mounted in the right end of the output connecting rod 3211, two rectangular slots 32111 are formed in the right side wall of the output connecting rod 3211 at least at equal intervals, a rectangular inserting rod 32201 is integrally formed in the left end of the drill rod 322, the rectangular inserting rod 32201 is inserted into the inside of the rectangular slots 32111, the rectangular inserting rod 32201 is fixedly connected with the output connecting rod 3211 through a screw 32202, rectangular through holes 331 are formed in the left and right sides of the inside of the rectangular block 33, a rectangular through hole 322 is formed in the bottom of the rectangular through hole 33, and a drill rod 322 is formed in the right side of the bottom of the rectangular inserting rod through the rectangular inserting rod 33, and the bottom of the rectangular inserting rod is formed through the right side wall through the bottom of the rectangular inserting rod 32133, and the bottom is welded on the bottom side of the bottom plate 333 by welding at the bottom of the bottom plate 3.
The punching mechanism further comprises a pressing mechanism, the pressing mechanism comprises a limit cylinder 34, the limit cylinder 34 is welded on the right side of the top of the bottom plate 3, the outer wall of the top of the limit cylinder 34 is welded with the inner wall of an inner ring of a wear-resistant bearing 341, a top plate 342 is welded on the outer wall of the wear-resistant bearing 341 and located below the top plate 342, a pressing plate 343 is movably sleeved on the outer portion of the limit cylinder 34, a telescopic pipe 346 is installed between the pressing plate 343 and the top plate 342, the telescopic pipe 346 is arranged in an outer pipe sleeve, a spring 345 is arranged in the telescopic pipe 346, the upper end and the lower end of the spring 345 are respectively propped against the bottom of the top plate 342 and the top of the pressing plate 343, and a limit plate 344 is welded on the outer wall of the limit cylinder 34 and located below the pressing plate 343.
In this embodiment, as shown in fig. 3, the inclined support plates 333 are provided with a left side and a right side, the left side and the right side of the inclined support plates 333 are welded on the left side and the right side of the bottom of the rectangular block 33, the inclined support plates 333 are all inclined outwards, the bottom of the rectangular block 33 is provided with a receiving groove 334, and the receiving groove 334 is located between the left side and the right side of the inclined support plates 333; the fixing effect on the rectangular block 33 is improved by the left and right inclined support plates 333, and the waste is conveniently received by the receiving chute 334.
In this embodiment, as shown in fig. 1, a riser 114 is provided on the base body of the upper mold 11, and the riser 114 is located at the right side of the feed inlet 112; a horn-shaped feeding pipe 113 is arranged at the feeding port 112; when molten metal is conveniently added through the riser 114, air in the molding cavity 121 is conveniently discharged from the riser 114, and the molten metal is conveniently regulated through the trumpet-shaped charging pipe 113.
In this embodiment, as shown in fig. 3, a limit bearing 3221 is sleeved outside the drill rod 322, both the top and the bottom of the outer ring of the limit bearing 3221 are welded with a limit connecting rod 3222, and the left end of the limit connecting rod 3222 is welded with the right side wall of the moving plate 32; through the effect of limit bearing 3221, improved the stability of drilling rod 322 when rotatory, improved the precision of punching.
In this embodiment, as shown in fig. 5, the top of the rectangular block 33 between the left and right rectangular through holes 331 is provided with an arc-shaped protrusion; the degree of fit of the U-shaped plate 21 is improved.
In this embodiment, as shown in fig. 3, a limiting round rod 312 is movably mounted on the base body of the positioning plate 31 in a transverse direction, and the right end of the limiting round rod 312 is connected with the left side wall of the moving plate 32; by the action of the limit round bar 312, the shaking of the moving plate 32 when moving left and right is reduced, and the punching precision is improved.
In this embodiment, as shown in fig. 3, at least four limit round rods 312 are equidistantly arranged, an external thread is provided on the outer wall of the right end of the limit round rod 312, a threaded hole is provided on the left side wall of the moving plate 32, and the right end of the limit round rod 312 is installed in the threaded hole through threaded connection; the spacing round bar 312 is convenient to disassemble and assemble by twisting the spacing round bar 312.
In this embodiment, as shown in fig. 8, the rollers 323 are mounted at the four corners of the bottom of the movable plate 32 in a rolling manner through the mounting frame, and the rollers 323 facilitate the left and right movement of the movable plate 32.
In this embodiment, as shown in fig. 3, arc handles 3341 are welded at the middle parts of the outer walls of the front and rear sides of the receiving chute 334; the receiving chute 334 is conveniently lifted by the arc handle 3341.
The invention also provides a metal piece production process, which comprises the following steps:
step one: feeding molten metal into the interior of the mold cavity 121 through the feed port 112;
step two: after the molten metal is cooled and molded, taking out the blank, as shown in fig. 2, inserting the left and right sides of the U-shaped plate 21 of the blank into the left and right rectangular through holes 331 respectively, wherein the state is shown in fig. 9, and then rotating the top plate 342 and the pressing plate 343 to press the pressing plate 343 above the blank, wherein the state is shown in fig. 6;
step three: starting a motor 321 to drive a drill rod 322 to rotate, simultaneously starting a motor 311 to drive a moving plate 32, the motor 321 and the drill rod 322 to move rightwards, enabling the drill rod 322 to pass through a circular through hole 332, enabling the drill rod 322 to pass through a blank piece to form a hole 23, and manufacturing the blank piece into a double-lug hinge finished product, as shown in fig. 7;
step four: the control electric cylinder 311 drives the moving plate 32, the motor 321 and the drill rod 322 to move leftwards, so that the moving plate 32, the motor 321 and the drill rod 322 are restored to the original positions, and then the double-lug hinge finished product is taken out;
step five: and taking out the finished product of the double-lug hinge and polishing.
The invention has the beneficial effects that:
in the invention, the blank is manufactured by the blank forming die 1, and then the blank is perforated by the perforating mechanism to manufacture the double-lug hinge finished product, thereby greatly reducing the manufacturing process and improving the production efficiency of the double-lug hinge finished product.
In the invention, when the blank is perforated, the left side and the right side of the U-shaped plate 21 are respectively inserted into the left rectangular through hole 331 and the right rectangular through hole 331, so that the protection of the U-shaped plate 21 is improved, the U-shaped plate 21 is prevented from deforming when the U-shaped plate 21 is perforated, and the quality of the double-lug hinge finished product is greatly improved.
According to the invention, through the effect of the limit bearing 3221, the stability of the drill rod 322 in rotation is improved, and the punching precision is improved.
According to the invention, through the action of the limiting round rod 312, the shaking of the moving plate 32 when moving left and right is reduced, and the punching precision is improved.
In the invention, when the blank is perforated, the top plate 342 and the pressing plate 343 are rotated, so that the pressing plate 343 is pressed above the blank, the limit of the blank is improved, and the perforation precision is further improved.
In the invention, the disassembly and assembly of the drill rod 322 are facilitated through the disassembly and assembly screw 32202, and the disassembly, assembly and replacement of the drill rod 322 are facilitated.
The embodiments of the present invention are disclosed as preferred embodiments, but not limited thereto, and those skilled in the art will readily appreciate from the foregoing description that various extensions and modifications can be made without departing from the spirit of the present invention.
Claims (1)
1. A metalwork apparatus for producing, its characterized in that: comprises a blank forming die (1) and an opening mechanism;
the blank forming die (1) comprises an upper die (11) and a lower die (12), a core (111) is integrally formed in the middle of the bottom of the upper die (11), a groove is formed in the top of the lower die (12), the core (111) and the groove form a cavity (121), the shape of the cavity (121) is the same as that of a double-lug hinge, a feeding hole (112) is formed in a base body of the upper die (11), the feeding hole (112) is communicated with the cavity (121), and a blank is manufactured through the blank forming die (1) and comprises a U-shaped plate (21) and a round rod (22);
the punching mechanism comprises a bottom plate (3) and a rectangular block (33), wherein a positioning plate (31) is welded on the left side of the top of the bottom plate (3), an electric cylinder (311) is installed in the middle of the right side wall of the positioning plate (31) through bolts, a moving plate (32) is installed at the right end of a piston rod of the electric cylinder (311) through bolts, a motor (321) is installed in the middle of the right side wall of the moving plate (32) through bolts, an output connecting rod (3211) is installed at the right end of an output shaft of the motor (321) through a coupler, a drill rod (322) is installed at the right end of the output connecting rod (3211), two rectangular slots (32111) are at least equidistantly formed in the right side wall of the output connecting rod (3211), rectangular inserting rods (32201) are integrally formed in the left end of the drill rod (322), rectangular inserting rods (32201) are inserted into the rectangular slots (32111), the rectangular inserting rods (32201) are fixedly connected with the right end of the output connecting rod (3211) through bolts, two rectangular inserting rods (32102) are fixedly connected with each other through the right end of the output connecting rod (3211), and a circular through hole (33) is formed in the left side of the bottom of the rectangular block (33), and the bottom of the bottom plate (33) is formed by welding at the right side of the bottom plate (33).
The punching mechanism further comprises a pressing mechanism, the pressing mechanism comprises a limit cylinder (34), the limit cylinder (34) is welded on the right side of the top of the bottom plate (3), the top outer wall of the limit cylinder (34) is welded with the inner ring inner wall of the wear-resistant bearing (341), a top plate (342) is welded on the outer wall of the wear-resistant bearing (341), a pressing plate (343) is movably sleeved outside the limit cylinder (34) below the top plate (342), a telescopic tube (346) is installed between the pressing plate (343) and the top plate (342), the telescopic tube (346) is arranged in an outer tube sleeve, a spring (345) is arranged in the telescopic tube (346), the upper end and the lower end of the spring (345) are respectively propped against the bottom of the top plate (342) and the top of the pressing plate (343), and a limit plate (344) is welded on the outer wall of the limit cylinder (34) below the pressing plate (343);
also provides a metal piece production process, which comprises the following steps:
step one: feeding molten metal into the interior of the molding cavity (121) through a feed port (112);
step two: after the molten metal is cooled and molded, taking out the blank, respectively inserting the left side and the right side of a U-shaped plate (21) of the blank into the left and the right rectangular through holes (331), and then rotating a top plate (342) and a pressing plate (343) to press the pressing plate (343) above the blank;
step three: starting a motor (321) to drive a drill rod (322) to rotate, simultaneously starting a motor (311) to drive a moving plate (32), the motor (321) and the drill rod (322) to move rightwards, enabling the drill rod (322) to pass through a circular through hole (332), enabling the drill rod (322) to pass through a blank to punch a hole (23), and manufacturing the blank into a double-lug hinge finished product;
step four: the control electric cylinder (311) drives the moving plate (32), the motor (321) and the drill rod (322) to move leftwards, so that the moving plate (32), the motor (321) and the drill rod (322) are restored to the original positions, and then the double-lug hinge finished product is taken out;
step five: and taking out the finished product of the double-lug hinge and polishing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110288764.5A CN112846673B (en) | 2021-03-18 | 2021-03-18 | Metal piece production device and process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110288764.5A CN112846673B (en) | 2021-03-18 | 2021-03-18 | Metal piece production device and process |
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| CN112846673A CN112846673A (en) | 2021-05-28 |
| CN112846673B true CN112846673B (en) | 2023-05-23 |
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| CN202110288764.5A Active CN112846673B (en) | 2021-03-18 | 2021-03-18 | Metal piece production device and process |
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