CN117139143A - A screening plant is made to metal powder for 3D prints - Google Patents
A screening plant is made to metal powder for 3D prints Download PDFInfo
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- CN117139143A CN117139143A CN202311426067.7A CN202311426067A CN117139143A CN 117139143 A CN117139143 A CN 117139143A CN 202311426067 A CN202311426067 A CN 202311426067A CN 117139143 A CN117139143 A CN 117139143A
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- screen
- main shaft
- assembly
- tension
- metal powder
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- 239000000843 powder Substances 0.000 title claims abstract description 35
- 238000012216 screening Methods 0.000 title claims abstract description 34
- 239000002184 metal Substances 0.000 title claims abstract description 26
- 230000007246 mechanism Effects 0.000 claims abstract description 49
- 238000010146 3D printing Methods 0.000 claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 238000009434 installation Methods 0.000 claims abstract description 11
- 230000000903 blocking effect Effects 0.000 claims description 56
- 238000004804 winding Methods 0.000 claims description 24
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 3
- 230000032683 aging Effects 0.000 abstract description 11
- 238000000034 method Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 239000004744 fabric Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/48—Stretching devices for screens
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Manufacture Or Reproduction Of Printing Formes (AREA)
Abstract
The invention discloses a metal powder manufacturing screening device for 3D printing, which comprises a self-adaptive uniform tensioning mechanism, a silk thread installation assembly, a screen vibration mechanism and a linkage type driving assembly. The invention belongs to the technical field of powder screening, and particularly relates to a metal powder manufacturing screening device for 3D printing; in order to solve the problems that the service life of the traditional high-mesh screen is low and the quality of products is affected after breakage, the invention firstly provides a screening device which can automatically tension when the screen is started and uniformly tension each group of screen wires; the screen wires can be automatically kept in a state of being tensioned by constant tension under the conditions that the ageing and stretching degrees of the screen wires of each group are different or the ageing and stretching amplitude is changed during continuous working through the tension uniform assembly which rotates along with the rotating main shaft before tensioning and does not rotate along with the rotating main shaft after tensioning; and this tension can be adjusted by a tension adjustment assembly.
Description
Technical Field
The invention belongs to the technical field of powder screening, and particularly relates to a metal powder manufacturing screening device for 3D printing.
Background
The 3D printed materials are classified into various kinds, and there are generally plastic, resin and metal powder, wherein the metal powder is solidified and formed by laser sintering, and the formed product has structural strength equal to or higher than that of the conventional metal casting, so that the 3D printed materials can be applied to industrial production.
The powder raw material for 3D printing has high requirements on particle size, and if the particle size of the material is too large, the melting degree when heated and the accuracy of the printed product are affected, so that the metal powder needs to be screened after being manufactured.
Unlike conventional screening devices, which are also woven from very fine threads because of the fine particle size requirements for the metal powder, such screens on the one hand need to withstand high tension (because of the small and uneven mesh gaps when the tension is insufficient), but because the material itself is thin, the tensile strength is relatively poor and therefore the breakage of the threads making up the screen is a frequent occurrence; if the powder breaks, the meshes are enlarged, so that some powder which is not satisfactory falls below, and the quality of the product is affected.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides a screening device for manufacturing metal powder for 3D printing, and in order to solve the problems that the service life of a traditional high-mesh screen is low and the quality of products is affected after breakage, the invention firstly provides a screening device capable of automatically tensioning when the machine is started and uniformly tensioning all groups of screen wires; the screen wires can be automatically kept in a state of being tensioned by constant tension under the conditions that the ageing and stretching degrees of the screen wires of each group are different or the ageing and stretching amplitude is changed during continuous working through the tension uniform assembly which rotates along with the rotating main shaft before tensioning and does not rotate along with the rotating main shaft after tensioning; and this tension can be adjusted by a tension adjustment assembly.
The technical scheme adopted by the invention is as follows: the invention provides a metal powder manufacturing screening device for 3D printing, which comprises a self-adaptive uniform tensioning mechanism, a silk thread installation assembly, a screen vibration mechanism and a linkage type driving assembly, wherein the self-adaptive uniform tensioning mechanism is arranged on the screen vibration mechanism, the silk thread installation assembly is arranged on the screen vibration mechanism, the distribution directions of the silk thread installation assembly and the self-adaptive uniform tensioning mechanism are opposite, and the linkage type driving assembly is arranged at a corner of the screen vibration mechanism.
Further, the self-adaptive uniform tensioning mechanism comprises a tensioning main shaft assembly, a tension uniform assembly and a tension adjusting assembly, wherein the tensioning main shaft assembly is arranged on the screen vibration mechanism, the tension uniform assembly array is arranged on the tensioning main shaft assembly, the tension uniform assembly is rotationally connected with the tensioning main shaft assembly, and the tension adjusting assembly is annularly and uniformly distributed in the tension uniform assembly.
The screen wire can be tensioned through the even straining device of self-adaptation just can realize when using, the technical effect of automatic relaxation when not using, on the one hand can prolong the life of screen cloth greatly, on the other hand can also avoid the screen cloth to become loose because of the live time overlength, thereby lead to the problem of clearance increase.
Preferably, the tensioning main shaft assembly comprises a main shaft supporting frame and a rotating main shaft, the main shaft supporting frame is fixedly connected to the screen vibration mechanism, main shaft step parts are symmetrically arranged at two ends of the rotating main shaft, the rotating main shaft is rotationally arranged in the main shaft supporting frame through the main shaft step parts, blocking ring parts are arranged on the rotating main shaft in an array mode, and the blocking ring parts are formed by ratchet teeth which are uniformly distributed in an annular mode.
Through the continuous and slow rotation of the rotary main shaft, the winding rings can always keep the tension force on the screen wires, and the screen wires on each group of winding rings are mutually independent, so that even if the stretching amount and the abrasion amount are different, each group of winding rings can be guaranteed to have the same rotation resistance, and the uniformity of the tension force of each group of screen wires is guaranteed.
As a further preferred aspect of the present invention, the tension uniformity component includes a blocking ring and a winding ring, the blocking ring is rotatably disposed on the rotating spindle, the blocking ring array is provided with a plurality of groups, a hollow ring portion is disposed inside the blocking ring, star-shaped circular platforms are uniformly and annularly disposed on the blocking ring, through internal threaded holes are disposed on the star-shaped circular platforms, and the winding ring is detachably disposed on an outer wall of the blocking ring.
As a further preferable mode of the invention, the tension adjusting assembly comprises a blocking rod, a resistance spring and a jackscrew, wherein the blocking rod is clamped and slidingly arranged in the internal threaded hole, a ball head part matched with the ratchet is arranged at the bottom of the blocking rod, the jackscrew is in threaded connection with the internal threaded hole, and the resistance spring is arranged between the blocking rod and the jackscrew.
When the screen wires are in a loose state, the blocking ring rotates along with the rotating main shaft; when the screen wire is tightened, if the blocking ring is required to rotate relative to the rotating main shaft, the blocking rod needs to retract against the elasticity of the resistance spring, and when the pulling force of the screen wire is enough to enable the blocking rod to retract to avoid the position, the blocking ring can not rotate along with the rotating main shaft any more, but is kept at the position and the angle, and in this state, the screen wire is continuously in the tightened state; thereby avoiding the problem of gap increase caused by aging and elongation of screen wires in the screening process.
The pre-compression amount of the resistance spring can be changed by rotating the jackscrew, so that the retraction resistance of the resistance rod is adjusted, and the tension existing on the screen wire when the resistance ring is in a balanced state is changed.
Further, the silk thread installation component includes dead lever, sieve silk and perpendicular fixed plate, the dead lever rigid coupling is on the winding, perpendicular fixed plate rigid coupling is on screen cloth vibration mechanism, the both ends of sieve silk respectively with dead lever and perpendicular fixed plate rigid coupling, the sieve silk is wound on the winding.
The fixing rod is used for fixing the end part of the screen wire on one hand, and judging the stretching amount of the screen wire through the position of the fixing rod in a tensioning state on the other hand, and when the stretching amount of the screen wire exceeds a certain range, a new screen wire needs to be replaced; the ageing stretching amount of the screen wires can be predicted through the fixed rod, so that the problem of mixing of large-particle-size powder caused by breakage of the screen wires in the screening process is avoided.
Further, the screen vibration mechanism comprises a screen assembly and a vibration assembly, wherein the vibration assembly is arranged on the linkage type driving assembly.
Preferably, the screen assembly comprises a screen bottom plate and a screen shell, a central square hole is formed in the middle of the screen bottom plate, the screen shell is fixedly connected to the screen bottom plate, a square portion with the same size as the central square hole is arranged on the screen shell, the boundaries of the square portion and the central square hole coincide, and a hinged sleeve used for being hinged with an external frame is arranged on one side of the screen bottom plate.
As a further preferable mode of the invention, the top end of the screen shell is provided with a round part, wire penetrating holes are arranged on the periphery of the square part in an array mode, and the screen wires are clamped and slidingly arranged in the wire penetrating holes; the main shaft support frame is fixedly connected to the screen bottom plate, and the vertical fixing plate is fixedly connected to the screen bottom plate.
Further, the linkage type driving assembly comprises a driving motor, a driving bevel gear and a driven bevel gear, wherein the driving motor is fixedly connected to the screen bottom plate, and an output shaft of the driving motor is connected with one group of the main shaft step parts; the driving bevel gear is arranged on a main shaft step part coaxial with a main shaft of the driving motor, and the driven bevel gear is arranged on the other group of main shaft step parts.
Preferably, the vibration assembly comprises an eccentric wheel and a vibration base, the eccentric wheel is clamped on an output shaft of the driving motor, the vibration base is fixedly connected to an external frame, and the eccentric wheel is in sliding contact with the vibration base.
The output shafts at the two ends of the driving motor are respectively connected with the self-adaptive uniform tensioning mechanism and the vibration assembly, so that the structure can be simplified, the starting time of the vibration assembly and the self-adaptive uniform tensioning mechanism can be matched, the self-adaptive uniform tensioning mechanism is started before screening, and the screening wires can be automatically adjusted to be in a tightening state before pouring materials; and the screen wire is closed after screening, and the screen wire can be automatically adjusted to a loose state after screening is stopped, so that the service life is prolonged.
The beneficial effects obtained by the invention by adopting the structure are as follows:
(1) The screen wire can be tensioned through the even straining device of self-adaptation just can realize when using, the technical effect of automatic relaxation when not using, on the one hand can prolong the life of screen cloth greatly, on the other hand can also avoid the screen cloth to become loose because of the live time overlength, thereby lead to the problem of clearance increase.
(2) Through the continuous and slow rotation of the rotary main shaft, the winding rings can always keep the tension force on the screen wires, and the screen wires on each group of winding rings are mutually independent, so that even if the stretching amount and the abrasion amount are different, each group of winding rings can be guaranteed to have the same rotation resistance, and the uniformity of the tension force of each group of screen wires is guaranteed.
(3) When the screen wires are in a loose state, the blocking ring rotates along with the rotating main shaft; when the screen wire is tightened, if the blocking ring is required to rotate relative to the rotating main shaft, the blocking rod needs to retract against the elasticity of the resistance spring, and when the pulling force of the screen wire is enough to enable the blocking rod to retract to avoid the position, the blocking ring can not rotate along with the rotating main shaft any more, but is kept at the position and the angle, and in this state, the screen wire is continuously in the tightened state; thereby avoiding the problem of gap increase caused by aging and elongation of screen wires in the screening process.
(4) The pre-compression amount of the resistance spring can be changed by rotating the jackscrew, so that the retraction resistance of the resistance rod is adjusted, and the tension existing on the screen wire when the resistance ring is in a balanced state is changed.
(5) The fixing rod is used for fixing the end part of the screen wire on one hand, and judging the stretching amount of the screen wire through the position of the fixing rod in a tensioning state on the other hand, and when the stretching amount of the screen wire exceeds a certain range, a new screen wire needs to be replaced; the ageing stretching amount of the screen wires can be predicted through the fixed rod, so that the problem of mixing of large-particle-size powder caused by breakage of the screen wires in the screening process is avoided.
(6) The output shafts at the two ends of the driving motor are respectively connected with the self-adaptive uniform tensioning mechanism and the vibration assembly, so that the structure can be simplified, the starting time of the vibration assembly and the self-adaptive uniform tensioning mechanism can be matched, the self-adaptive uniform tensioning mechanism is started before screening, and the screening wires can be automatically adjusted to be in a tightening state before pouring materials; and the screen wire is closed after screening, and the screen wire can be automatically adjusted to a loose state after screening is stopped, so that the service life is prolonged.
Drawings
FIG. 1 is a perspective view of a metal powder manufacturing screen apparatus for 3D printing according to the present invention;
FIG. 2 is a front view of a metal powder manufacturing screen apparatus for 3D printing according to the present invention;
FIG. 3 is a top view of a metal powder manufacturing screen apparatus for 3D printing according to the present invention;
FIG. 4 is a cross-sectional view taken along section line A-A of FIG. 2;
FIG. 5 is a cross-sectional view taken along section line B-B in FIG. 2;
FIG. 6 is a cross-sectional view taken along section line C-C in FIG. 5;
FIG. 7 is an exploded view of a metal powder manufacturing screen apparatus for 3D printing according to the present invention;
FIG. 8 is an enlarged view of a portion of the portion I of FIG. 5;
FIG. 9 is an enlarged view of a portion of the portion II of FIG. 6;
FIG. 10 is an enlarged view of a portion of III in FIG. 4;
fig. 11 is an enlarged view of a portion at iv in fig. 7.
Wherein, 1, a self-adaptive uniform tensioning mechanism, 2, a silk thread installation component, 3, a screen vibration mechanism, 4, a linkage driving component, 5, a tensioning main shaft component, 6, a tension uniform component, 7, a tension adjusting component, 8, a main shaft supporting frame, 9, a rotating main shaft, 10, a blocking ring, 11, a winding ring, 12, a blocking rod, 13, a resistance spring, 14, a jackscrew, 15, a main shaft step part, 16, a blocking ring part, 17, ratchets, 18 and a hollow ring part, 19, a star-shaped round table, 20, an internally threaded hole, 21, a ball head part, 22, a fixed rod, 23, screen wires, 24, a vertical fixed plate, 25, a screen assembly, 26, a vibration assembly, 27, a screen bottom plate, 28, a screen shell, 29, an eccentric wheel, 30, a vibration base, 31, a central square hole, 32, a hinged sleeve, 33, a round part, 34, a square part, 35, a wire through hole, 36, a driving motor, 37, a driving bevel gear, 38 and a driven bevel gear.
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention; all other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate orientation or positional relationships based on those shown in the drawings, merely to facilitate description of the invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
As shown in fig. 1 to 11, the invention provides a metal powder manufacturing screening device for 3D printing, which comprises a self-adaptive uniform tensioning mechanism 1, a wire mounting assembly 2, a screen vibration mechanism 3 and a linkage driving assembly 4, wherein the self-adaptive uniform tensioning mechanism 1 is arranged on the screen vibration mechanism 3, the wire mounting assembly 2 and the self-adaptive uniform tensioning mechanism 1 are opposite in distribution direction, and the linkage driving assembly 4 is arranged at the corner of the screen vibration mechanism 3.
The screen vibration mechanism 3 includes a screen assembly 25 and a vibration assembly 26, and the vibration assembly 26 is provided on the linkage type driving assembly 4.
The screen assembly 25 comprises a screen bottom plate 27 and a screen shell 28, a central square hole 31 is formed in the middle of the screen bottom plate 27, the screen shell 28 is fixedly connected to the screen bottom plate 27, a square portion 34 with the same size as the central square hole 31 is arranged on the screen shell 28, the boundaries of the square portion 34 and the central square hole 31 coincide, and a hinged sleeve 32 used for being hinged with an external frame is arranged on one side of the screen bottom plate 27.
The top end of the screen shell 28 is provided with a round part 33, wire penetrating holes 35 are arranged on the periphery of the square part 34 in an array manner, and the screen wires 23 are clamped and slidingly arranged in the wire penetrating holes 35; the main shaft support frame 8 is fixedly connected to the screen bottom plate 27, and the vertical fixing plate 24 is fixedly connected to the screen bottom plate 27.
The self-adaptive uniform tensioning mechanism 1 comprises a tensioning main shaft assembly 5, a tensioning uniform assembly 6 and a tensioning adjustment assembly 7, wherein the tensioning main shaft assembly 5 is arranged on the screen vibration mechanism 3, the tensioning uniform assembly 6 is arranged on the tensioning main shaft assembly 5 in an array mode, the tensioning uniform assembly 6 is rotationally connected with the tensioning main shaft assembly 5, and the tensioning adjustment assembly 7 is annularly and uniformly distributed in the tensioning uniform assembly 6.
The screen wire 23 can be tensioned through the self-adaptive uniform tensioning mechanism 1, and the technical effects of automatic loosening when not in use can be achieved, so that the service life of the screen can be greatly prolonged on one hand, and the problem that the screen is loosened due to overlong service time and the gap is increased can be avoided on the other hand.
The tensioning main shaft assembly 5 comprises a main shaft supporting frame 8 and a rotary main shaft 9, the main shaft supporting frame 8 is fixedly connected to the screen vibrating mechanism 3, main shaft step parts 15 are symmetrically arranged at two ends of the rotary main shaft 9, the rotary main shaft 9 is rotatably arranged in the main shaft supporting frame 8 through the main shaft step parts 15, blocking ring parts 16 are arranged on the rotary main shaft 9 in an array mode, and the blocking ring parts 16 are formed by ratchet teeth 17 which are uniformly distributed in an annular mode.
Through the continuous and slow rotation of the rotary main shaft 9, the winding rings 11 can always keep the tension force on the screen wires 23, and the screen wires 23 on each group of winding rings 11 are mutually independent, so that even if the stretching amount and the abrasion amount are different, each group of winding rings 11 can be guaranteed to have the same rotation resistance, and the uniformity of the pulling force of each group of screen wires 23 is guaranteed.
The tension uniformity component 6 comprises a blocking ring 10 and a winding ring 11, wherein the blocking ring 10 is rotationally arranged on a rotary spindle 9, a plurality of groups of blocking rings 10 are arranged in an array mode, hollow ring portions 18 are arranged in the blocking ring 10, star-shaped round tables 19 are uniformly distributed on the blocking ring 10 in an annular mode, through internal threaded holes 20 are formed in the star-shaped round tables 19, and the winding ring 11 is detachably arranged on the outer wall of the blocking ring 10.
The tension adjusting assembly 7 comprises a blocking rod 12, a resistance spring 13 and a jackscrew 14, wherein the blocking rod 12 is clamped and slidingly arranged in an internal threaded hole 20, a ball head part 21 matched with a ratchet 17 is arranged at the bottom of the blocking rod 12, the jackscrew 14 is in threaded connection with the internal threaded hole 20, and the resistance spring 13 is arranged between the blocking rod 12 and the jackscrew 14.
When the screen wires 23 are in a loose state, the blocking ring 10 rotates together with the rotating main shaft 9; when the screen wire 23 is tightened, if the blocking ring 10 wants to rotate relative to the rotating main shaft 9, the blocking rod 12 needs to retract against the elastic force of the resistance spring 13, and when the pulling force of the screen wire 23 is enough to retract the blocking rod 12 to avoid, the blocking ring 10 does not rotate along with the rotating main shaft 9 any more, but keeps at the position and the angle, and in this state, the screen wire 23 is continuously in the tightened state; thereby avoiding the problem of increased gaps caused by the aged elongation of the screen wires 23 during screening.
By rotating the top wire 14, the pre-compression amount of the resistance spring 13 can be changed, so that the retraction resistance of the resistance rod 12 is adjusted, and the tension existing on the screen wire 23 when the resistance ring 10 is in a balanced state is changed.
The silk thread installation component 2 includes dead lever 22, sieve silk 23 and perpendicular fixed plate 24, and dead lever 22 rigid coupling is on winding circle 11, and perpendicular fixed plate 24 rigid coupling is on screen cloth vibration mechanism 3, and the both ends of sieve silk 23 are respectively with dead lever 22 and perpendicular fixed plate 24 rigid coupling, and sieve silk 23 winds on winding circle 11.
The fixing rod 22 is used for fixing the end part of the screen wire 23, and on the other hand, the stretching amount of the screen wire 23 can be judged by the position of the fixing rod 22 in a tensioning state, and when the stretching amount of the screen wire 23 exceeds a certain range, a new screen wire 23 needs to be replaced; the aged stretching amount of the screen wires 23 can be predicted by the fixing rod 22, so that the problem of mixing of large-particle-size powder caused by breakage of the screen wires 23 in the screening process is avoided.
The linkage type driving assembly 4 comprises a driving motor 36, a driving bevel gear 37 and a driven bevel gear 38, wherein the driving motor 36 is fixedly connected to the screen bottom plate 27, and an output shaft of the driving motor 36 is connected with one group of the main shaft step parts 15; the drive bevel gear 37 is provided on the spindle step 15 coaxial with the spindle of the drive motor 36, and the driven bevel gear 38 is provided on the other set of spindle steps 15.
The vibration assembly 26 comprises an eccentric wheel 29 and a vibration base 30, the eccentric wheel 29 is clamped on an output shaft of a driving motor 36, the vibration base 30 is fixedly connected to an external frame, and the eccentric wheel 29 and the vibration base 30 are in sliding contact.
The output shafts at the two ends of the driving motor 36 are respectively connected with the self-adaptive uniform tensioning mechanism 1 and the vibration assembly 26, so that on one hand, the structure can be simplified, on the other hand, the starting time of the vibration assembly 26 and the self-adaptive uniform tensioning mechanism 1 can be matched, the self-adaptive uniform tensioning mechanism is started before screening, and the screen wires 23 can be automatically adjusted to be in a tight state before pouring materials; and the screen wires 23 can be automatically adjusted to a loose state after screening is stopped so as to prolong the service life.
When the device is specifically used, firstly, a user needs to start the driving motor 36, and when the output shaft of the driving motor 36 rotates, on one hand, the rotation of the rotating main shafts 9 can be carried out, and the two groups of the rotating main shafts 9 synchronously rotate under the transmission action of the driving bevel gear 37 and the driven bevel gear 38, and the rotation directions of the two groups of the rotating main shafts 9 are the directions for tightening the screen wires 23; on the other hand, the driving motor 36 will also rotate with the eccentric 29, and since the screen base plate 27 is hinged relative to the frame and the vibration base 30 is fixed relative to the frame, when the eccentric 29 rotates, the screen base plate 27 will continuously vibrate in pitch to promote the powder material to pass through the screen;
in the initial stage of rotation of the rotary spindle 9, the screen wires 23 are in a loose state, and the tension uniformity assembly 6 rotates along with the rotary spindle 9; with the screen wires 23 tensioned, when the tension force of the screen wires 23 is enough to enable the blocking rod 12 to retract against the elastic force of the resistance spring 13, the rotation main shaft 9 can not drive the tension uniform assembly 6 to rotate any more, and at this time, the tension uniform assembly 6 is stationary relative to the screen bottom plate 27, and the rotation main shaft 9 idles;
because the tension uniform assemblies 6 of each group move independently of each other, when the ageing and elongation of the screen wires 23 on the tension uniform assemblies 6 of each group are different, the tension uniform assemblies 6 of each group can be balanced at different angles, and the screen wires 23 on the tension uniform assemblies 6 of each group can be independently replaced without replacing the whole set once;
during the continuous rotation of the rotary spindle 9, idle rotation with respect to the tension equalizing assembly 6 always occurs; in the continuous and long-time working process, if the ageing stretching amount of the screen wires 23 is increased, the tension uniformity component 6 also compensates the change through the rotation of the tension uniformity component, so that the tension stability of the screen wires 23 is maintained;
while the tension of the screen wire 23 is related to the rebound resistance of the blocking lever 12, when the adjustment is required, the pre-compression amount of the resistance spring 13 can be changed by turning the jackscrew 14 after the winding coil 11 is removed by stopping the machine, thereby changing the tension of the screen wire 23;
if the stretching amount of the screen wire 23 increases, the angle of the fixing rod 22 will change, and when the angle of the fixing rod 22 exceeds a certain range, this indicates that the pulling amount of the screen wire 23 is too long, so as to avoid breakage during use, and the screen wire 23 needs to be replaced at this time.
As another new embodiment of the invention, a plurality of groups of screen wires 23 may be provided on one group of winding turns 11, the plurality of groups of screen wires 23 being replaced together after ageing.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
The invention and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the invention as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present invention.
Claims (10)
1. A screening plant is made to metal powder for 3D prints, its characterized in that: the self-adaptive uniform tensioning device comprises a self-adaptive uniform tensioning mechanism (1), a silk thread installation component (2), a screen vibration mechanism (3) and a linkage type driving component (4), wherein the self-adaptive uniform tensioning mechanism (1) is arranged on the screen vibration mechanism (3), the silk thread installation component (2) is arranged on the screen vibration mechanism (3), the distribution directions of the silk thread installation component (2) and the self-adaptive uniform tensioning mechanism (1) are opposite, and the linkage type driving component (4) is arranged at the corner of the screen vibration mechanism (3);
the self-adaptive uniform tensioning mechanism (1) comprises a tensioning main shaft assembly (5), a tension uniform assembly (6) and a tension adjusting assembly (7), wherein the tensioning main shaft assembly (5) is arranged on the screen vibrating mechanism (3), the tension uniform assembly (6) is arranged on the tensioning main shaft assembly (5) in an array mode, the tension uniform assembly (6) is rotationally connected with the tensioning main shaft assembly (5), and the tension adjusting assembly (7) is annularly and uniformly distributed in the tension uniform assembly (6).
2. A metal powder manufacturing screening device for 3D printing according to claim 1, wherein: the tensioning main shaft assembly (5) comprises a main shaft supporting frame (8) and a rotating main shaft (9), the main shaft supporting frame (8) is fixedly connected to the screen vibration mechanism (3), main shaft step parts (15) are symmetrically arranged at two ends of the rotating main shaft (9), the rotating main shaft (9) is rotationally arranged in the main shaft supporting frame (8) through the main shaft step parts (15), a blocking ring part (16) is arranged on the rotating main shaft (9) in an array mode, and the blocking ring part (16) is formed by ratchet teeth (17) which are uniformly distributed in a ring shape.
3. A metal powder manufacturing screening device for 3D printing according to claim 2, wherein: the tension uniformity assembly (6) comprises a blocking ring (10) and a winding ring (11), the blocking ring (10) is rotationally arranged on a rotating main shaft (9), a plurality of groups of blocking rings (10) are arranged in an array, hollow ring parts (18) are arranged in the blocking ring (10), star-shaped circular tables (19) are annularly and uniformly distributed on the blocking ring (10), through internal threaded holes (20) are formed in the star-shaped circular tables (19), and the winding ring (11) can be detachably arranged on the outer wall of the blocking ring (10).
4. A metal powder manufacturing screening device for 3D printing according to claim 3, wherein: the tension adjusting assembly (7) comprises a blocking rod (12), a resistance spring (13) and a jackscrew (14), wherein the blocking rod (12) is clamped and slides in an internal threaded hole (20), a ball head part (21) matched with a ratchet (17) is arranged at the bottom of the blocking rod (12), the jackscrew (14) is in threaded connection with the internal threaded hole (20), and the resistance spring (13) is arranged between the blocking rod (12) and the jackscrew (14).
5. A metal powder manufacturing screen apparatus for 3D printing as defined in claim 4, wherein: the silk thread installation component (2) comprises a fixed rod (22), a screen silk (23) and a vertical fixed plate (24), wherein the fixed rod (22) is fixedly connected to the winding ring (11), the vertical fixed plate (24) is fixedly connected to the screen vibration mechanism (3), two ends of the screen silk (23) are fixedly connected with the fixed rod (22) and the vertical fixed plate (24) respectively, and the screen silk (23) is wound on the winding ring (11).
6. A metal powder manufacturing screen apparatus for 3D printing as defined in claim 5, wherein: the screen vibration mechanism (3) comprises a screen assembly (25) and a vibration assembly (26), and the vibration assembly (26) is arranged on the linkage type driving assembly (4).
7. A metal powder manufacturing screen apparatus for 3D printing as defined in claim 6, wherein: the screen assembly (25) comprises a screen bottom plate (27) and a screen shell (28), a central square hole (31) is formed in the middle of the screen bottom plate (27), the screen shell (28) is fixedly connected to the screen bottom plate (27), a square portion (34) with the same size as the central square hole (31) is arranged on the screen shell (28), the boundaries of the square portion (34) and the central square hole (31) coincide, and a hinged sleeve (32) used for being hinged with an external frame is arranged on one side of the screen bottom plate (27).
8. A metal powder manufacturing screen apparatus for 3D printing as defined in claim 7, wherein: the top end of the screen shell (28) is provided with a round part (33), the periphery of the square part (34) is provided with a wire penetrating hole (35), and the screen wires (23) are clamped and slidingly arranged in the wire penetrating hole (35);
the main shaft support frame (8) is fixedly connected to the screen bottom plate (27), and the vertical fixing plate (24) is fixedly connected to the screen bottom plate (27).
9. A metal powder manufacturing screen apparatus for 3D printing as claimed in claim 8, wherein: the linkage type driving assembly (4) comprises a driving motor (36), a driving bevel gear (37) and a driven bevel gear (38), wherein the driving motor (36) is fixedly connected to the screen bottom plate (27), and an output shaft of the driving motor (36) is connected with one group of main shaft step parts (15); the drive bevel gear (37) is arranged on a main shaft step part (15) coaxial with a main shaft of the driving motor (36), and the driven bevel gear (38) is arranged on the other group of main shaft step parts (15).
10. A metal powder manufacturing screening device for 3D printing according to claim 9, wherein: the vibration assembly (26) comprises an eccentric wheel (29) and a vibration base (30), the eccentric wheel (29) is clamped on an output shaft of a driving motor (36), the vibration base (30) is fixedly connected to an external frame, and the eccentric wheel (29) and the vibration base (30) are in sliding contact.
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| CN202311426067.7A CN117139143B (en) | 2023-10-31 | 2023-10-31 | A screening plant is made to metal powder for 3D prints |
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| CN202311426067.7A CN117139143B (en) | 2023-10-31 | 2023-10-31 | A screening plant is made to metal powder for 3D prints |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117548338A (en) * | 2024-01-11 | 2024-02-13 | 山西园区建设发展集团有限公司 | Closed vibration screening device for concrete mixing |
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| CN117139143B (en) | 2024-03-08 |
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