CN116984563A - Machining device and machining method for ball screw nut - Google Patents
Machining device and machining method for ball screw nut Download PDFInfo
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- CN116984563A CN116984563A CN202311261514.8A CN202311261514A CN116984563A CN 116984563 A CN116984563 A CN 116984563A CN 202311261514 A CN202311261514 A CN 202311261514A CN 116984563 A CN116984563 A CN 116984563A
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- 238000003754 machining Methods 0.000 title claims description 15
- 238000000034 method Methods 0.000 title claims description 10
- 238000001816 cooling Methods 0.000 claims abstract description 48
- 238000000465 moulding Methods 0.000 claims abstract description 17
- 238000002347 injection Methods 0.000 claims abstract description 16
- 239000007924 injection Substances 0.000 claims abstract description 16
- 238000003672 processing method Methods 0.000 claims abstract description 12
- 238000005266 casting Methods 0.000 claims description 51
- 239000002184 metal Substances 0.000 claims description 27
- 239000000110 cooling liquid Substances 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 16
- 239000012943 hotmelt Substances 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 12
- 239000011324 bead Substances 0.000 claims description 7
- 239000012809 cooling fluid Substances 0.000 claims description 5
- 230000000295 complement effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 12
- 239000008358 core component Substances 0.000 abstract 2
- 238000007789 sealing Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 9
- 238000001125 extrusion Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000003578 releasing effect Effects 0.000 description 2
- 238000007514 turning Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 240000004282 Grewia occidentalis Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
- B22C9/065—Cooling or heating equipment for moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
Abstract
The application relates to a processing device and a processing method of a ball screw nut, wherein the processing device of the ball screw nut comprises: and the die body is provided with a circular die cavity. The mold core assembly is provided with spiral ribs and a plurality of cooling flow passages, the cooling flow passages extend from one end of the mold core assembly to the other end, and a forming space is formed between the mold core assembly and the mold cavity. The demolding device drives the mold core assembly to rotationally demold; the mold cover assembly and the demolding device are respectively used for sealing two ends of the mold cavity, and the mold cover assembly is provided with a diversion channel communicated with the cooling flow channel and an injection channel communicated with the molding space. And a forming space matched with the ball screw nut is formed between the mold core component and the mold main body, the mold release device drives the mold core component to rotate and spirally release the mold, and the mold release effect is good and the forming efficiency is high.
Description
Technical Field
The application relates to the technical field of casting, in particular to a processing device and a processing method of a ball screw nut.
Background
The screw-nut pair is a high-precision moving mechanism used in equipment transmission, and can drive moving parts of equipment to have high position precision. The screw nut pair comprises a screw shaft, a screw nut and balls which are connected with the screw nut and the screw shaft in a rolling way, and the balls support the screw shaft and the screw nut and roll along a movement track.
The existing screw nut processing adopts bar stock cutting processing shaping or extrusion processing to combine cutting processing shaping, and this extrusion processing combines cutting processing shaping process to include: blanking bar materials, annealing, forward extrusion, backward extrusion, turning appearance, drilling, turning and milling internal threads, carburizing and grinding internal threads.
However, the extrusion process described above requires the manufacture of a die, which is costly and has a short life. And the material needs to be annealed before extrusion to reduce the hardness of the material, increase the preparation process of the screw nut and increase the cost. Moreover, the screw nut adopts a drilling process to cause a great deal of raw material waste, and the manufacturing cost is high, so the screw nut needs to be improved.
Disclosure of Invention
In order to overcome the problems in the related art, the embodiment of the application provides a processing device and a processing method of a ball screw nut, which are used for solving the technical problems of high die cost, complex processing technology and large material waste.
According to a first aspect of an embodiment of the present application, there is provided a processing apparatus for a ball screw nut, including:
a die body provided with a circular die cavity;
the mold core assembly is inserted into the mold cavity and is provided with a convex spiral rib and a plurality of cooling flow passages arranged around the center, the cooling flow passages extend from one end of the mold core assembly to the other end, and a forming space is formed between the mold core assembly and the mold cavity;
the demolding device is connected with the mold core assembly and drives the mold core assembly to rotationally demold;
the mold comprises a mold main body, a mold cover assembly and a demolding device, wherein the mold main body is detachably connected with the mold cover assembly, the mold cover assembly and the demolding device are respectively sealed at two ends of the mold cavity, and the mold cover assembly is provided with a diversion channel communicated with the cooling flow channel and an injection channel communicated with the molding space.
In one embodiment, the cooling flow channel is arranged in a spiral shape, and the cooling flow channel is matched with the spiral ribs; or, the cooling flow channel comprises a converging cavity, a plurality of flow channels connected to the converging cavity in parallel and a centrally arranged converging channel, wherein the plurality of flow channels are arranged around the converging channel.
In one embodiment, the mold body is integrally formed; or, the die main body comprises a bottom die and a side die which are complementarily matched, and the side die is embedded with the bottom die.
In one embodiment, the mold body includes at least one stop bead protruding into the mold cavity.
In one embodiment, the demolding device comprises a mold core seat connected to the mold core assembly, a driving gear and a power mechanism connected to the driving gear, wherein the driving gear is in toothed engagement with the mold core seat.
In an embodiment, a heating assembly is also included and disposed around the mold body for heating the mold body.
In an embodiment, the mold cover assembly and the mold body are connected in a jogged manner through at least two jogging mechanisms, the jogging mechanisms comprise jogging convex blocks and jogging grooves which are matched with each other, wherein the jogging convex blocks are arranged on one of the mold cover assembly and the mold body, and the jogging grooves are arranged on the other of the mold cover assembly and the mold body.
According to a second aspect of the embodiments of the present application, there is provided a processing method of a ball screw nut, to which the processing apparatus described above is applied, the processing method including:
s101, injecting hot melt metal liquid into the molding space along the injection channel;
s102, injecting a first cooling liquid along the cooling flow channel after the injection of the hot melt metal liquid is completed, and forming a casting after the hot melt metal liquid is cooled for a preset period of time, wherein the cooling speed of the hot melt metal liquid close to the mold core assembly is greater than that of the hot melt metal liquid close to the mold main body;
s103, removing the die cover assembly;
s104, driving the mold core assembly to rotate relative to the casting through the demolding device, and demolding the casting and the mold core assembly.
In one embodiment, before executing S104, the processing method further includes: the mold body is heated to expand the mold body and the casting.
In an embodiment, in S102, injecting a second cooling liquid along the mold body, the second cooling liquid having a cooling temperature greater than a temperature of the first cooling liquid.
The technical scheme provided by the embodiment of the application can comprise the following beneficial effects: the processing device processes the ball screw nut, can realize casting processing, and has low die cost and good molding effect. The ball screw nut is cast and molded, so that few machining materials are needed, and the machining cost and the material cost are low. And a forming space matched with the ball screw nut is formed between the mold core assembly and the mold main body, and the mold release device drives the mold core assembly to rotate and spirally release the mold, so that the mold release effect is good, the forming efficiency is high, and the processing technology is simplified.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic view of a construction of a processing apparatus according to an exemplary embodiment;
FIG. 2 is a schematic diagram of an exploded construction of a processing device according to an exemplary embodiment;
FIG. 3 is a schematic structural view of a mold core assembly according to an exemplary embodiment;
FIG. 4 is a schematic structural view of a mold body shown according to an exemplary embodiment;
fig. 5 is a schematic structural view of a mold cap assembly according to an exemplary embodiment.
In the figure, a mold body 10; a bottom die 11; a base portion 111; a boss portion 112; a side die 12; a cavity 13; a fitting mechanism 14; a fitting projection 141; a fitting groove 142; stop ribs 15; a die cover assembly 20; an injection passage 21; a diversion channel 22; a positioning groove 23; a mold core assembly 30; spiral ribs 31; a cooling flow passage 32; a summary channel 321; a flow channel 322; a confluence chamber 323; a demolding device 40; a drive tooth 41; a die core holder 42; the gear 50 is driven.
Detailed Description
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to be limiting of the present patent; for the purpose of better illustrating embodiments of the application, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the application correspond to the same or similar components; in the description of the present application, it should be understood that, if the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present application and simplifying the description, rather than indicating or implying that the apparatus or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration and should not be construed as limiting the present patent, and that the specific meaning of the terms described above may be understood by those of ordinary skill in the art according to specific circumstances.
In the description of the present application, unless explicitly stated and limited otherwise, the term "coupled" or the like should be interpreted broadly, as it may be fixedly coupled, detachably coupled, or integrally formed, as indicating the relationship of components; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between the two parts or interaction relationship between the two parts. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1 to 5, the present application provides a processing device for a ball screw nut, which includes a mold body 10, a mold core assembly 30, a demolding device 40, and a mold cover assembly 20.
The mold body 10 is provided with a circular cavity 13, and the cavity 13 penetrates both ends of the mold body 10 to constitute a straight hole-like space. Alternatively, the mold body 10 is of unitary construction, with the mold cavity 13 extending through the mold body 10. Alternatively, the mold body 10 is a split structure, and the mold body 10 is formed by combining two parts. The processing device processes the ball screw nut, can realize casting processing, and has low die cost and good molding effect. The ball screw nut is cast and molded, so that few machining materials are needed, and the machining cost and the material cost are low.
The mold core assembly 30 is inserted into the mold cavity 13, a molding space is formed between the mold core assembly 30 and the mold cavity 13, and the mold cover assembly 20 and the demolding device 40 respectively close two ends of the mold cavity 13. Wherein, the mold cover assembly 20 is detachably connected to the top end of the mold body 10, and the mold cover assembly 20 is provided with a diversion channel 22 communicated with the cooling flow channel 32 and an injection channel 21 communicated with the molding space.
In one embodiment, the mold cover assembly 20 and the mold body 10 are connected in a jogged manner by at least two jogging mechanisms 14, and the jogging mechanisms 14 comprise jogging convex blocks 141 and jogging grooves 142 which are matched with each other. Wherein, the engaging protrusion 141 is disposed on one of the mold cover assembly 20 and the mold body 10, and the engaging groove 142 is disposed on the other of the mold cover assembly 20 and the mold body 10. The mold cover assembly 20 covers the top of the mold body 10 and closes one end opening of the mold cavity 13. The injection channel 21 penetrates through the mold cover assembly 20 and is communicated with the molding space of the mold cavity 13, and molten metal enters the molding space along the injection channel 21 for molding and cooling. Preferably, the engaging mechanism 14 is provided with four groups and distributed at four corners of the mold cover assembly 20 to form four-corner positioning, and has high positioning accuracy and good attaching effect. The mold cover assembly 20 and the mold body 10 are connected by the jogging mechanism 14, and the disassembly and the assembly are convenient.
Preferably, the mold cap assembly 20 is provided with recessed detents 23, the detents 23 being used to locate the top of the mold core assembly 30. The mold core assembly 30 is inserted into the positioning groove 23, thereby forming a positioning structure.
The molten metal is injected into the molding space and then cooled to form a casting corresponding to the ball screw nut. Wherein the outer circumferential wall of the casting is complementary to the surface of the mold cavity 13 and the inner circumferential wall of the casting is complementary in shape to the outer circumferential wall of the core assembly 30. The outer circumferential wall of the core assembly 30 is provided with a convex spiral bead 31 and a plurality of cooling runners 32 disposed around the center, the cooling runners 32 extending from one end of the core assembly 30 to the other end, and accordingly, a spiral structure is formed in the inner circumferential wall of the casting.
The mold cap assembly 20 is removed after the casting has been cooled, and a stripper 40 is coupled to the mold core assembly 30. The stripper 40 drives the mold core assembly 30 to rotationally strip the mold core assembly 30 from the casting. Cooling runners 32 are provided in the core assembly 30 and the casting is cooled progressively from the center outwardly. The cooling rate at the center of the casting is greater than the cooling rate at the periphery, and after the inner ring cools, the periphery cools and contracts, thereby separating the inner surface of the casting from the outer surface of the core assembly 30 to form a gap that facilitates demolding of the core assembly 30 from the casting.
A forming space adapted to the ball screw nut is formed between the mold core assembly 30 and the mold body 10, and the mold releasing device 40 drives the mold core assembly 30 to rotate and spirally release the mold, so that the mold releasing effect is good, the forming efficiency is high, and the processing technology is simplified.
In one embodiment, the cooling flow channel 32 is configured in a spiral shape, and the cooling flow channel 32 is matched with the spiral rib 31. The cooling flow channel 32 is in a spiral structure and is matched with the spiral convex rib 31 to rotate, so that the spiral cooling effect can be improved, and the mold core assembly 30 can be uniformly cooled. Preferably, the inflow channels of the cooling runners 32 flow outwardly from the central inflow followed by the spiral sections, wherein the central inflow sections may be preheated to avoid uneven cooling of the castings.
In one embodiment, the cooling flow path 32 includes a converging chamber 323, a plurality of flow channels 322 connected in parallel to the converging chamber 323, and a centrally disposed converging channel 321, the plurality of flow channels 322 disposed around the converging channel 321. The manifold chamber 323 is located at the bottom of the mold core assembly 30 and the flow channels 322 are evenly distributed around the manifold channel 321 to form a generally split-structured liquid flow channel 322. When the cooling liquid is split from the collecting channel 321 and enters the flow channel 322, uniform heat dissipation is realized, and the uniformity of shrinkage is improved. Alternatively, the cooling liquid enters from the flow channel 322 and flows out from the collecting channel 321 in a unified manner so as to realize liquid merging.
As shown in fig. 1 and 4, in one embodiment, the mold body 10 is integrally formed, and in this embodiment, a through-hole-like mold cavity 13 is formed in the material, and the mold cavity 13 is adapted to receive and accommodate a suitable mold core assembly 30 for the combined construction of the molding space. The die main body 10 has good structural stability, high structural strength and simple disassembly and assembly procedures.
In another embodiment, the mold body 10 includes a bottom mold 11 and a side mold 12 that are complementarily fitted, and the side mold 12 is fitted to the bottom mold 11. The bottom die 11 and the side die 12 are folded to form the die main body 10, so that the processing convenience and the forming complexity are improved. The bottom die 11 includes a base portion 111 and a boss portion 112 protruding from the base portion 111, an installation gap is formed between the base portion 111 and the boss portion 112, and the side die 12 is installed in the installation gap to form a complementary installation structure. Preferably, at least two positioning grooves are provided between the base portion 111 and/or the boss portion 112, and the side mold 12 is provided with matching positioning bosses. When the side die 12 is folded to the bottom die 11, the positioning boss is embedded into the positioning groove so as to realize plugging positioning, and the assembly precision is high.
In one embodiment, the mold body 10 includes at least one stop bead 15 projecting inwardly of the mold cavity 13. The stopper ribs 15 extend in a direction parallel to the center line of the cavity 13 to constitute a parallel structure. The stop bead 15 is provided along the drawing direction of the casting to facilitate control of separation of the casting from the mold body 10. At the same time, the stop bead 15 projects toward the center of the cavity 13, thereby preventing rotation of the casting and improving the smoothness of rotational disengagement of the mold core assembly 30 driven by the stripper 40. Preferably, two opposing stop ribs 15 are provided, one of which is provided to the side mold 12 and is centered with respect to the semicircular groove of the side mold 12, and the other of which is provided to the boss portion 112.
The demolding device 40 is used for driving the mold core assembly 30 to rotationally demold, wherein the demolding device 40 comprises a mold core seat 42 connected to the mold core assembly 30, a driving gear 50 and a power mechanism connected to the driving gear 50, and the driving gear 50 is in tooth-shaped meshed connection with the mold core seat 42. The core print 42 is coupled to the core assembly 30, optionally with a fastener locking connection. Optionally, the core mount 42 and the core assembly 30 are threadably coupled to form a screw drive structure. The die core holder 42 is provided with toothed driving teeth 41, and the driving gear 50 is engaged with the driving teeth 41. The power mechanism can be set as a power motor or a mechanism for outputting power, and the power motor drives the mold core assembly 30 to rotate through the mold core seat 42 so as to achieve the demolding effect of the casting. Wherein the cover assembly 20 needs to be removed prior to performing the demolding of the casting.
Further, the tooling assembly also includes a heating assembly disposed about the mold body 10 for heating the mold body 10 prior to the stripper 40 driving the mold core assembly 30 in rotation. The heating assembly heats up around the mold body 10 to cause the casting to expand thermally and tighten against the walls of the mold cavity 13. The mold core assembly 30 and the casting have reduced rotational resistance due to the outward expansion and deformation, facilitating demolding. When the mould cavity 13 is provided with a protruding positioning boss, the anti-rotation effect of the casting is better. After the core assembly 30 is disengaged from the casting, the side forms 12 may be removed to facilitate removal of the casting. Preferably, the heating assembly is provided as a heating structure such as a heating belt, a heating strip or a heating mantle.
Preferably, the coefficient of thermal expansion of the side mold 12 is greater than the coefficient of thermal expansion of the core assembly 30, so that the deformation of the core assembly 30 against the casting during the demolding and heating process is small, thereby improving the smoothness of the demolding.
As shown in fig. 1 to 5, the above processing apparatus is applied to a ball screw nut, wherein the processing method of the ball screw nut includes the steps of:
step S101 of injecting a molten metal into the molding space along the injection passage 21. The molten metal fills the molding space along the injection passage 21, and the aperture of the injection passage 21 gradually decreases from the molding space to the outside to constitute a tapered runner. Preferably, the level of the hot melt metal is at least partially located in the injection channel 21 to meet the feeding and forming requirements.
In step S102, after the injection of the hot melt metal is completed, the first cooling liquid is injected along the cooling flow channel 32, and the hot melt metal is cooled for a preset period of time to form a casting, wherein the cooling speed of the hot melt metal near the mold core assembly 30 is greater than the cooling speed of the hot melt metal near the mold main body 10. In this step, the first cooling liquid circulates from the middle of the core assembly 30 toward the outer peripheral wall to form a gradient cooling effect, and the mold release resistance of the cast and the core assembly 30 is adjusted. The cooling runners 32 are evenly distributed with respect to the peripheral wall of the core assembly 30 such that the temperature of the surface of the core assembly 30 is lower than the temperature of the mold body 10. The molten metal adjacent the surface of the core assembly 30 is chilled and solidifies, while the molten metal adjacent the mold body 10 is cooled slowly. Thus, when molten metal adjacent to the mold body 10 condenses, a collapsing force acting outwardly from the center is formed, thereby reducing the squeeze fit of the core assembly 30 to the casting, facilitating demolding of the core assembly 30.
Step S103, removing the mold cover assembly 20.
Step S104, the mold core assembly 30 is driven to rotate relative to the casting by the demolding device 40, and the casting is demolded from the mold core assembly 30.
After the mold cover assembly 20 is removed, the demolding device 40 is connected to the end part of the mold core assembly 30 and drives the mold core assembly 30 to rotate so as to realize demolding, and the demolding device is convenient to disassemble and assemble. Preferably, in performing step S104, the mold body 10 is inverted so that the gravity of the casting and the mold body 10 does not act on the core assembly 30, improving the smoothness of the removal of the core assembly 30.
In one embodiment, before performing step S104, the processing method further includes: the mold body 10 is heated to expand the mold body 10 against the casting. The heating assembly heats up around the mold body 10 to cause the casting to expand thermally and tighten against the walls of the mold cavity 13. The mold core assembly 30 and the casting have reduced rotational resistance due to the outward expansion and deformation of the casting, facilitating demolding. When the mould cavity 13 is provided with a protruding positioning boss, the anti-rotation effect of the casting is better. After the core assembly 30 is disengaged from the casting, the side forms 12 may be removed to facilitate removal of the casting. In the processing method, the difference of the thermal expansion and contraction amounts of the metal is utilized to realize the separation of the joint surface of the casting and the mold core assembly 30 and the separation of the joint surface of the casting and the mold main body 10, so that the mold core assembly 30 can be conveniently unscrewed from the casting. Preferably, the coefficient of thermal expansion of the side mold 12 is greater than the coefficient of thermal expansion of the core assembly 30, so that the deformation of the core assembly 30 against the casting during the demolding and heating process is small, thereby improving the smoothness of the demolding.
In step S102, a first cooling fluid is input to the core assembly 30 to effect centered cooling of the casting, thereby creating the effect of a cooling gradient of the molten metal that progressively cools from the center to the periphery. Further, the processing method further includes injecting a second cooling liquid along the mold body 10, the cooling temperature of the second cooling liquid being greater than the cooling temperature of the first cooling liquid. A second cooling fluid is fed into the mold body 10 to cool the outside of the mold cavity 13 to improve the overall temperature stability and maintain the controllability of the cooling gradient of the molten metal in the mold cavity 13. Preferably, the temperature of the second cooling liquid is higher than that of the first cooling liquid, so that cooling of the molten metal can be realized, and the molten metal can be kept from concentrating stress of the casting due to overlarge temperature difference. Preferably, the second cooling liquid is the first cooling liquid output from the mold core assembly 30, and the second cooling liquid and the first cooling liquid are different stages of the same cooling pipeline, so that the circulation flow of the cooling liquid is realized and the heat recycling efficiency is improved.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. A processing device for a ball screw nut, comprising:
a die body provided with a circular die cavity;
the mold core assembly is inserted into the mold cavity and is provided with a convex spiral rib and a plurality of cooling flow passages arranged around the center, the cooling flow passages extend from one end of the mold core assembly to the other end, and a forming space is formed between the mold core assembly and the mold cavity;
the demolding device is connected with the mold core assembly and drives the mold core assembly to rotationally demold;
the mold comprises a mold main body, a mold cover assembly and a demolding device, wherein the mold main body is detachably connected with the mold cover assembly, the mold cover assembly and the demolding device are respectively sealed at two ends of the mold cavity, and the mold cover assembly is provided with a diversion channel communicated with the cooling flow channel and an injection channel communicated with the molding space.
2. The processing apparatus of a ball screw nut according to claim 1, wherein the cooling flow passage is provided in a spiral shape, the cooling flow passage being matched with the spiral bead; or alternatively, the first and second heat exchangers may be,
the cooling flow channel comprises a converging cavity, a plurality of flow channels connected to the converging cavity in parallel and a centrally arranged converging channel, wherein the plurality of flow channels are arranged around the converging channel.
3. The processing apparatus of a ball screw nut according to claim 1, wherein the die main body is integrally formed; or alternatively, the first and second heat exchangers may be,
the die body comprises a bottom die and a side die which are in complementary fit, and the side die is embedded in the bottom die.
4. A ball screw nut machining apparatus according to claim 3, wherein the die body includes at least one stop bead projecting inwardly of the die cavity.
5. The ball screw nut machining device of claim 1, wherein the demolding device comprises a mold core seat connected to the mold core assembly, a driving gear and a power mechanism connected to the driving gear, wherein the driving gear and the mold core seat are in toothed engagement.
6. The ball screw nut machining device of claim 1, further comprising a heating assembly disposed around the mold body, the heating assembly for heating the mold body.
7. The ball screw nut machining device according to claim 1, wherein the die cover assembly and the die body are connected in a jogged manner by at least two jogging mechanisms, the jogging mechanisms comprise jogging convex blocks and jogging grooves which are matched with each other, wherein the jogging convex blocks are arranged on one of the die cover assembly and the die body, and the jogging grooves are arranged on the other of the die cover assembly and the die body.
8. A method of machining a ball screw nut, characterized in that the machining apparatus according to any one of claims 1 to 7 is applied, the machining method comprising:
s101, injecting hot melt metal liquid into the molding space along the injection channel;
s102, injecting a first cooling liquid along the cooling flow channel after the injection of the hot melt metal liquid is completed, and forming a casting after the hot melt metal liquid is cooled for a preset period of time, wherein the cooling speed of the hot melt metal liquid close to the mold core assembly is greater than that of the hot melt metal liquid close to the mold main body;
s103, removing the die cover assembly;
s104, driving the mold core assembly to rotate relative to the casting through the demolding device, and demolding the casting and the mold core assembly.
9. The processing method according to claim 8, characterized in that before executing S104, the processing method further comprises: the mold body is heated to expand the mold body and the casting.
10. The method of processing according to claim 8, further comprising injecting a second cooling fluid along the mold body, the second cooling fluid having a cooling temperature greater than a temperature of the first cooling fluid in S102.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311261514.8A CN116984563A (en) | 2023-09-27 | 2023-09-27 | Machining device and machining method for ball screw nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311261514.8A CN116984563A (en) | 2023-09-27 | 2023-09-27 | Machining device and machining method for ball screw nut |
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| CN116984563A true CN116984563A (en) | 2023-11-03 |
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| CN202311261514.8A Pending CN116984563A (en) | 2023-09-27 | 2023-09-27 | Machining device and machining method for ball screw nut |
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| CN204308157U (en) * | 2014-12-03 | 2015-05-06 | 东莞精明五金科技有限公司 | Compression mod spiral core-pulling mechanism |
| CN107803468A (en) * | 2017-12-06 | 2018-03-16 | 陆亚明 | Screw rotors moulding machine |
| CN208148388U (en) * | 2018-05-10 | 2018-11-27 | 宁波金雨精密模具有限公司 | A kind of internal screw thread rotation depanning mold |
| CN208558159U (en) * | 2018-08-02 | 2019-03-01 | 大连经济技术开发区大鹏模塑有限公司 | A kind of mold with cooling rotating core |
| CN211279555U (en) * | 2019-11-30 | 2020-08-18 | 达利塑胶制品(深圳)有限公司 | Automatic demolding mold |
| CN212385890U (en) * | 2020-04-16 | 2021-01-22 | 上海思索模具成型有限公司 | Nut forming die with cover |
| CN215095251U (en) * | 2021-04-14 | 2021-12-10 | 杭州均成包装科技有限公司 | Annotate embryo structure |
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2023
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| JP2004351446A (en) * | 2003-05-28 | 2004-12-16 | Hitachi Industrial Equipment Systems Co Ltd | Method for casting multiple screw-shaped parts |
| CN204308157U (en) * | 2014-12-03 | 2015-05-06 | 东莞精明五金科技有限公司 | Compression mod spiral core-pulling mechanism |
| CN107803468A (en) * | 2017-12-06 | 2018-03-16 | 陆亚明 | Screw rotors moulding machine |
| CN208148388U (en) * | 2018-05-10 | 2018-11-27 | 宁波金雨精密模具有限公司 | A kind of internal screw thread rotation depanning mold |
| CN208558159U (en) * | 2018-08-02 | 2019-03-01 | 大连经济技术开发区大鹏模塑有限公司 | A kind of mold with cooling rotating core |
| CN211279555U (en) * | 2019-11-30 | 2020-08-18 | 达利塑胶制品(深圳)有限公司 | Automatic demolding mold |
| CN212385890U (en) * | 2020-04-16 | 2021-01-22 | 上海思索模具成型有限公司 | Nut forming die with cover |
| CN215095251U (en) * | 2021-04-14 | 2021-12-10 | 杭州均成包装科技有限公司 | Annotate embryo structure |
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