CN115750711B - High-precision ball nut and manufacturing process thereof - Google Patents
High-precision ball nut and manufacturing process thereof Download PDFInfo
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- CN115750711B CN115750711B CN202211504695.8A CN202211504695A CN115750711B CN 115750711 B CN115750711 B CN 115750711B CN 202211504695 A CN202211504695 A CN 202211504695A CN 115750711 B CN115750711 B CN 115750711B
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Abstract
The invention relates to the technical field of mechanical transmission equipment, in particular to a high-precision ball nut and a manufacturing process thereof. The ball screw module is suitable for high-speed transmission, the inner lining is connected with the screw, the heat transfer ring is used for transferring heat generated in the ball transmission process to the outer sleeve, the outer sleeve is provided with the heat dissipation grooves for heat dissipation, the heat dissipation spaces are matched on a load for installation and use, and the ball screw module is good in structural durability and suitable for high-speed high-precision transmission.
Description
Technical Field
The invention relates to the technical field of mechanical transmission equipment, in particular to a high-precision ball nut and a manufacturing process thereof.
Background
In a general mechanical linear transmission mode, a nut is screwed to a screw, and the nut is driven to move along the axial direction of the screw by the rotation of the screw, so that the rotation transmission of a shaft is converted into linear transmission. In order to reduce the friction between the ball screw and the nut, the balls are placed between the screw and the nut, a combination of the ball screw and the ball nut is formed, and the friction is reduced by rolling the balls.
The existing ball nut is not provided with heat dissipation and poor durability under the friction effect in use, and particularly on some high-speed transmission mechanisms, the service life of the ball nut can be influenced due to heat generated by the rapid sliding friction of the balls, so that the structure of the existing ball nut needs to be improved.
Disclosure of Invention
In order to solve the problems, the invention provides a ball screw module suitable for high-speed transmission, the inner lining is connected with a screw, the heat transfer ring is used for transferring heat generated in the ball transmission process to the outer sleeve, the outer sleeve is provided with a heat dissipation groove for heat dissipation, the heat dissipation space is matched with a load for installation and use, the structural durability is good, and the ball screw module is suitable for high-speed high-precision transmission and a manufacturing process thereof.
The technical scheme adopted by the invention is as follows: the utility model provides a high accuracy ball nut, includes inside lining, heat transfer ring and overcoat, the ball groove has been seted up to the internal diameter of inside lining, the internal diameter cover of heat transfer ring is established the external diameter of inside lining and through metallurgical composite connection in the external diameter of inside lining, the overcoat is equipped with the inner chamber, the heat transfer ring will the inside lining is fixed at the inner chamber, the one end of overcoat is equipped with the shaft hole, the shaft hole is coaxial with the internal diameter of inside lining.
The utility model provides a further improvement does, first flat position and second flat position have been seted up to the external diameter of overcoat, ball circulation channel is installed to first flat position, ball circulation channel's both ends connect respectively in the both ends in ball groove, first heat dissipation groove has been seted up to first flat position, the one end intercommunication in first heat dissipation groove ball circulation channel, the feed liquor groove has been seted up to ball circulation channel, the one end intercommunication in feed liquor groove first heat dissipation groove, first heat dissipation inslot is filled with lubricating oil, when ball at ball circulation channel internal activity, with the lubrication in the first heat dissipation groove from micropore leading-in to ball circulation channel.
The technical scheme is further improved in that the lining is a bronze lining, the heat transfer ring is an aluminum alloy heat transfer ring, and the heat transfer ring and the lining are integrated through metallurgical compounding.
The technical scheme is further improved in that the lining is a stainless steel lining, and the heat transfer ring is formed on the outer diameter of the lining by copper powder metallurgy in a composite mode.
In a further improvement of the above scheme, the inner diameter of the lining is provided with a chromium plating layer, and the chromium plating layer covers the ball grooves.
The improvement of the scheme is that the inner diameter of the outer sleeve and the outer diameter of the heat transfer ring are integrated through metallurgical bonding, the outer diameter of the outer sleeve is provided with a mounting panel, the mounting panel is provided with a mounting hole, one end of the outer sleeve, which is close to the first heat dissipation groove, is provided with an assembly end, and the assembly end is used for sealing the first heat dissipation groove when the outer sleeve is assembled.
The scheme is further improved in that a plurality of second heat dissipation grooves are uniformly distributed on the second flat positions, and the second heat dissipation grooves are U-shaped and are close to the outer diameter of the heat transfer ring.
The technical scheme is further improved that guide sheets are arranged in the first heat dissipation grooves and used for guiding lubricating oil towards the liquid inlet grooves, and the guide sheets are obliquely and parallelly distributed on two sides of the ball circulation channel; the opening of the liquid inlet groove faces the guide piece and is provided with an expansion inclined plane.
A manufacturing process of high-precision ball nut comprises the high-precision ball nut;
step S1, metallurgical compounding: preparing a lining and a heat transfer ring, connecting the heat transfer ring to the outer diameter of the lining through metallurgical bonding, and combining the two into a whole;
step S2, processing the outer sleeve: machining the outer sleeve into a specified size, hollowing the inner diameter, and rough machining the outer diameter;
step S3, assembling and matching: fixedly mounting the compounded lining and the heat transfer ring on the inner diameter of the outer sleeve;
step S4, finish machining: the outer diameter of the outer sleeve is machined in place, the inner diameter of the lining is machined by clamping the outer diameter which is machined in place, and a ball groove is machined;
s5, machining the first flat position and the second flat position after finishing machining the ball groove, machining the ball circulation channel, installing and connecting the ball circulation channel with two ends of the ball groove, and finally performing secondary finish machining on the ball groove;
and S6, after finishing the secondary processing of the ball groove, performing chromium plating treatment on the inner diameter of the lining, and simultaneously electroplating a chromium coating on the ball groove to finish the processing of the ball nut.
In the step S1, the lining is a bronze lining, the heat transfer ring is an aluminum alloy heat transfer ring, and the heat transfer ring and the lining are integrated through metallurgical composition;
in step S3, the jacket is a bronze jacket and is integrally formed with the outer diameter of the heat transfer ring by metallurgical bonding.
In the step S1, the lining is a stainless steel lining, and the heat transfer ring is formed on the outer diameter of the lining by copper powder metallurgy in a composite mode;
in the step S3, the outer sleeve is a stainless steel outer sleeve and is integrally connected with the heat transfer ring through powder metallurgy, and after the connection, gaps are filled at the gaps of the connection through cold spraying copper powder, and then the step S4 is performed.
The beneficial effects of the invention are as follows:
compared with the traditional ball nut, the ball nut provided by the invention consists of the inner lining, the heat transfer ring and the outer sleeve, is suitable for being used for the ball screw module of high-speed transmission, the inner lining is connected with the screw, the heat transfer ring is used for transmitting heat generated in the ball transmission process to the outer sleeve, the outer sleeve is provided with the heat dissipation groove for heat dissipation, and the heat dissipation space is matched on a load for installation and use, so that the ball nut is good in structural durability, suitable for high-speed high-precision transmission and strong in practicability. Specifically, the inner liner, the heat transfer ring and the outer sleeve are arranged, the ball groove is formed in the inner diameter of the inner liner, the inner diameter of the heat transfer ring is sleeved on the outer diameter of the inner liner and is connected to the outer diameter of the inner liner through metallurgical composite, the inner sleeve is provided with an inner cavity, the heat transfer ring is used for fixing the inner liner in the inner cavity, one end of the outer sleeve is provided with a shaft hole, and the shaft hole is coaxial with the inner diameter of the inner liner. The lining and the heat transfer ring are made of integrated metal composite materials formed by combining metallurgical technology, and the two metal combination aims at ensuring wear resistance and heat transfer property, and the two materials are combined with each other to utilize the respective characteristics. The inner lining is made of stainless steel or bronze, and is subjected to inner diameter chromium plating treatment to strengthen wear resistance, and the heat transfer ring is made of copper powder or aluminum alloy, and is made of high heat transfer performance material to strengthen heat dissipation of the structure.
The outer diameter of the outer sleeve is provided with a first flat position and a second flat position, the first flat position is provided with a ball circulation channel, two ends of the ball circulation channel are respectively connected to two ends of the ball groove, the first flat position is provided with a first heat dissipation groove, one end of the first heat dissipation groove is communicated with the ball circulation channel, the ball circulation channel is provided with a liquid inlet groove, one end of the liquid inlet groove is communicated with the first heat dissipation groove, lubricating oil is filled in the first heat dissipation groove, and when the ball moves in the ball circulation channel, the lubricating oil in the first heat dissipation groove is led into the ball circulation channel from micropores; first flat and second flat symmetry installation, first flat can cooperate mounting structure up when the assembly, the second flat then can cooperate the structure towards fretwork, and then first heat dissipation groove on first flat can be sealed, set up lubricating oil in inside and also can not appear leaking the liquid phenomenon, ball circulation channel and feed liquor groove have been set up simultaneously, can produce pressure differential when the ball rolls, circulate in leading-in ball circulation channel with lubricating oil, produce pressure differential when the upset also can be leading-in with lubricating oil from the another side, form cyclic utilization, the ball lubricity is better when using, and then also can prolong the durability greatly.
The manufacturing process for the high-precision ball nut comprises the following steps of: step S1, metallurgical compounding: preparing a lining and a heat transfer ring, connecting the heat transfer ring to the outer diameter of the lining through metallurgical bonding, and combining the two into a whole; step S2, processing the outer sleeve: machining the outer sleeve into a specified size, hollowing the inner diameter, and rough machining the outer diameter; step S3, assembling and matching: fixedly mounting the compounded lining and the heat transfer ring on the inner diameter of the outer sleeve; step S4, finish machining: the outer diameter of the outer sleeve is machined in place, the inner diameter of the lining is machined by clamping the outer diameter which is machined in place, and a ball groove is machined; s5, machining the first flat position and the second flat position after finishing machining the ball groove, machining the ball circulation channel, installing and connecting the ball circulation channel with two ends of the ball groove, and finally performing secondary finish machining on the ball groove; and S6, after finishing the secondary processing of the ball groove, performing chromium plating treatment on the inner diameter of the lining, and simultaneously electroplating a chromium coating on the ball groove to finish the processing of the ball nut. The whole process is that the structure is metallurgically combined, then the structure is subjected to finish machining and forming, and finally the plating layer is reinforced, so that the durability in use is better, the whole process flow is suitable for mass production, and the durability of the produced ball nut is good.
Drawings
FIG. 1 is a schematic perspective view of a high precision ball nut of the present invention;
FIG. 2 is a schematic perspective view of the high precision ball nut of FIG. 1 from another perspective;
FIG. 3 is a schematic perspective view of the high precision ball nut of FIG. 1 from another perspective;
FIG. 4 is a schematic front view of the high precision ball nut of FIG. 1;
FIG. 5 is a cross-sectional view of A-A of FIG. 4;
FIG. 6 is a schematic view of the high precision ball nut of FIG. 1 in use;
fig. 7 is a schematic view of the high-precision ball nut of fig. 1 in use from another perspective.
Reference numerals illustrate: liner 1, ball groove 11, heat transfer ring 2, overcoat 3, shaft hole 31, first flat position 32, first heat dissipation groove 321, guide piece 321a, second flat position 33, second heat dissipation groove 331, ball circulation channel 34, feed liquor groove 341, mounting panel 35, mounting hole 351.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
As shown in fig. 1 to 7, in one embodiment of the present invention, a high-precision ball nut is provided, which comprises a liner 1, a heat transfer ring 2, and an outer sleeve 3, wherein the inner diameter of the liner 1 is provided with a ball groove 11, the inner diameter of the heat transfer ring 2 is sleeved on the outer diameter of the liner 1 and is connected to the outer diameter of the liner 1 by metallurgical bonding, the outer sleeve 3 is provided with an inner cavity, the heat transfer ring 2 fixes the liner 1 in the inner cavity, one end of the outer sleeve 3 is provided with a shaft hole 31, and the shaft hole 31 is coaxial with the inner diameter of the liner 1.
According to a further improvement of the embodiment, a first flat position 32 and a second flat position 33 are formed on the outer diameter of the outer sleeve 3, a ball circulation channel 34 is arranged on the first flat position 32, two ends of the ball circulation channel 34 are respectively connected with two ends of the ball groove 11, a first heat dissipation groove 321 is formed on the first flat position 32, one end of the first heat dissipation groove 321 is communicated with the ball circulation channel 34, a liquid inlet groove 341 is formed on the ball circulation channel 34, one end of the liquid inlet groove 341 is communicated with the first heat dissipation groove 321, lubricating oil is filled in the first heat dissipation groove 321, and when the balls move in the ball circulation channel 34, the lubricating oil in the first heat dissipation groove 321 is led into the ball circulation channel 34 from micropores; first flat position 32 and the symmetrical installation of second flat position 33, first flat position 32 can cooperate mounting structure up when the assembly, second flat position 33 then can cooperate the structure towards fretwork, and then first heat dissipation groove 321 on first flat position 32 can be sealed, the weeping phenomenon also can not appear in inside setting up lubricating oil, ball circulation channel 34 and feed liquor groove 341 have been set up simultaneously, can produce pressure differential when the ball rolls, lead into ball circulation channel 34 with lubricating oil and circulate, produce pressure differential when the upset also can lead in lubricating oil from the another side, form cyclic utilization, the ball lubricity is better when using, and then also can prolong the durability greatly.
In another embodiment of the invention, the inner liner 1 is a bronze inner liner 1, the heat transfer ring 2 is an aluminum alloy heat transfer ring 2, and the heat transfer ring 2 is integrated with the inner liner 1 through metallurgical compounding.
In another embodiment of the invention, the inner liner 1 is a stainless steel inner liner 1, the heat transfer ring 2 is formed on the outer diameter of the inner liner 1 by copper powder metallurgy in a composite mode, in this embodiment, the stainless steel inner liner 1 is adopted, and the heat transfer is high in efficiency by copper powder combination, the heat transfer efficiency of the structure is high, and the durability of the structure can be ensured.
Further improvement of the above embodiment is that the inner diameter of the liner 1 is provided with a chrome plating layer, the ball groove 11 is covered by the chrome plating layer, the durability of the chrome plating layer reinforcing structure is provided, the chrome plating layer is attached to the inner diameter of the liner 1 in a sputtering or electroplating mode, the wear resistance is better during reciprocating transmission, and the durability is further improved.
The further improvement to the above-mentioned embodiment is, the internal diameter of overcoat 3 and the external diameter of heat transfer ring 2 form an organic wholely through metallurgical bonding, the external diameter of overcoat 3 is equipped with mounting panel 35, mounting hole 351 has been seted up on the mounting panel 35, the one end that overcoat 3 is close to first heat dissipation groove 321 is equipped with the assembly end, the assembly end is used for sealing first heat dissipation groove 321 when overcoat 3 is assembled, and overcoat 3 also adopts metallurgical bonding, specifically through powder structure, and structural integrity is good, sets up the assembly end simultaneously and prevents the weeping phenomenon to appear when the use after the assembly, strengthens the durability.
The further improvement of the above embodiment is that a plurality of second heat dissipation grooves 331 are uniformly distributed on the second flat portion 33, the second heat dissipation grooves 331 are in a U shape and are close to the outer diameter of the heat transfer ring 2, and the heat dissipation is performed through the hollow structure after the assembly by the plurality of second heat dissipation grooves 331, so that the heat dissipation effect of the structure is ensured.
In a further improvement of the above embodiment, a guiding plate 321a is disposed in the first heat dissipation groove 321, the guiding plate 321a is used for guiding the lubricating oil towards the liquid inlet groove 341, and the guiding plate 321a is obliquely and parallelly distributed at two sides of the ball circulation channel 34; an opening of the liquid inlet tank 341 faces the guide plate 321a and is provided with an expansion inclined plane; the guide piece 321a can guide the lubricating oil into the ball circulation channel 34 under the action of pressure difference, and the expanding inclined surface is arranged to facilitate the guiding of the lubricating oil.
In another embodiment of the present invention, a manufacturing process for the high-precision ball nut includes the following steps:
step S1, metallurgical compounding: preparing a lining 1 and a heat transfer ring 2, connecting the heat transfer ring 2 to the outer diameter of the lining 1 through metallurgical bonding, and combining the two into a whole;
step S2, processing the outer sleeve 3: machining the outer sleeve 3 into a specified size, hollowing the inner diameter, and rough machining the outer diameter;
step S3, assembling and matching: fixedly mounting the compounded lining 1 and the heat transfer ring 2 on the inner diameter of the outer sleeve 3;
step S4, finish machining: the outer diameter of the outer sleeve 3 is machined in place, the inner diameter of the lining 1 is machined by clamping the outer diameter which is machined in place, and a ball groove 11 is machined;
step S5, after finishing processing the ball groove 11, processing the first flat position and the second flat position, then processing the ball circulation channel 34, installing and connecting the ball circulation channel 34 at two ends of the ball groove 11, and finally performing secondary finish machining on the ball groove 11;
and S6, after finishing the secondary processing of the ball groove 11, performing chromium plating treatment on the inner diameter of the liner 1, and simultaneously electroplating a chromium plating layer on the ball groove 11 to finish the processing of the ball nut. The whole process is that the structure is metallurgically combined, then the structure is subjected to finish machining and forming, and finally the plating layer is reinforced, so that the durability in use is better, the whole process flow is suitable for mass production, and the durability of the produced ball nut is good.
In a further improvement of the above embodiment, in step S1, the inner liner 1 is a bronze inner liner 1, the heat transfer ring 2 is an aluminum alloy heat transfer ring 2, and the heat transfer ring 2 is integrally formed with the inner liner 1 through metallurgical compounding; in step S3, the outer sleeve 3 is a bronze outer sleeve 3 and is integrally formed with the outer diameter of the heat transfer ring 2 by metallurgical bonding; in the embodiment, copper and aluminum are combined into a whole, so that the heat transfer efficiency is high, the characteristics of the two materials are combined, and the durability is improved.
In step S1, the inner liner 1 is a stainless steel inner liner 1, and the heat transfer ring 2 is formed by copper powder metallurgical composite molding on the outer diameter of the inner liner 1; in the step S3, the outer sleeve 3 is a stainless steel outer sleeve 3 and is integrally connected with the heat transfer ring 2 through powder metallurgy, and after the connection, gaps are filled at the gaps of the connection through cold spraying copper powder, and then the step S4 is carried out; in the embodiment, copper powder metallurgy is adopted, gaps can be filled, the structure connection density is higher, the heat transfer performance is better, and the durability is stronger.
The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (9)
1. A high precision ball nut, characterized in that: the inner diameter of the lining is provided with a ball groove, the inner diameter of the heat transfer ring is sleeved on the outer diameter of the lining and is connected with the outer diameter of the lining through metallurgical composite, the outer sleeve is provided with an inner cavity, the heat transfer ring fixes the lining in the inner cavity, one end of the outer sleeve is provided with a shaft hole, and the shaft hole is coaxial with the inner diameter of the lining;
the outer diameter of the outer sleeve is provided with a first flat position and a second flat position, the first flat position is provided with a ball circulation channel, two ends of the ball circulation channel are respectively connected with two ends of the ball groove, the first flat position is provided with a first heat dissipation groove, one end of the first heat dissipation groove is communicated with the ball circulation channel, the ball circulation channel is provided with a liquid inlet groove, one end of the liquid inlet groove is communicated with the first heat dissipation groove, lubricating oil is filled in the first heat dissipation groove, and when the ball moves in the ball circulation channel, the lubricating oil in the first heat dissipation groove is led into the ball circulation channel from micropores;
the manufacturing process of the high-precision ball nut comprises the following steps of:
step S1, metallurgical compounding: preparing a lining and a heat transfer ring, connecting the heat transfer ring to the outer diameter of the lining through metallurgical bonding, and combining the two into a whole;
step S2, processing the outer sleeve: machining the outer sleeve into a specified size, hollowing the inner diameter, and rough machining the outer diameter;
step S3, assembling and matching: fixedly mounting the compounded lining and the heat transfer ring on the inner diameter of the outer sleeve;
step S4, finish machining: the outer diameter of the outer sleeve is machined in place, the inner diameter of the lining is machined by clamping the outer diameter which is machined in place, and a ball groove is machined;
s5, machining the first flat position and the second flat position after finishing machining the ball groove, machining the ball circulation channel, installing and connecting the ball circulation channel with two ends of the ball groove, and finally performing secondary finish machining on the ball groove;
and S6, after finishing the secondary processing of the ball groove, performing chromium plating treatment on the inner diameter of the lining, and simultaneously electroplating a chromium coating on the ball groove to finish the processing of the ball nut.
2. The high precision ball nut as defined in claim 1, wherein: the inner lining is a bronze inner lining, the heat transfer ring is an aluminum alloy heat transfer ring, and the heat transfer ring and the inner lining are integrated through metallurgical compounding.
3. The high precision ball nut as defined in claim 1, wherein: the inner lining is a stainless steel inner lining, and the heat transfer ring is formed on the outer diameter of the inner lining by copper powder metallurgy in a composite mode.
4. A high precision ball nut as claimed in claim 2 or 3, wherein: the inner diameter of the lining is provided with a chromium plating layer, and the chromium plating layer covers the ball grooves.
5. The high precision ball nut as defined in claim 1, wherein: the inner diameter of the outer sleeve and the outer diameter of the heat transfer ring are integrated through metallurgical bonding, the outer diameter of the outer sleeve is provided with a mounting panel, a mounting hole is formed in the mounting panel, one end, close to the first heat dissipation groove, of the outer sleeve is provided with an assembly end, and the assembly end is used for sealing the first heat dissipation groove when the outer sleeve is assembled.
6. The high precision ball nut as defined in claim 1, wherein: and a plurality of second heat dissipation grooves are uniformly distributed on the second flat positions, and the second heat dissipation grooves are U-shaped and are close to the outer diameter of the heat transfer ring.
7. The high precision ball nut as defined in claim 1, wherein: the first heat dissipation groove is internally provided with guide sheets, the guide sheets are used for guiding lubricating oil towards the liquid inlet groove, and the guide sheets are obliquely and parallelly distributed on two sides of the ball circulation channel; the opening of the liquid inlet groove faces the guide piece and is provided with an expansion inclined plane.
8. The high precision ball nut as defined in claim 1, wherein: in the step S1, the lining is a bronze lining, the heat transfer ring is an aluminum alloy heat transfer ring, and the heat transfer ring and the lining are integrated through metallurgical composition;
in step S3, the jacket is a bronze jacket and is integrally formed with the outer diameter of the heat transfer ring by metallurgical bonding.
9. The high precision ball nut as defined in claim 1, wherein: in the step S1, the lining is a stainless steel lining, and the heat transfer ring is formed on the outer diameter of the lining by copper powder metallurgy in a composite mode;
in the step S3, the outer sleeve is a stainless steel outer sleeve and is integrally connected with the heat transfer ring through powder metallurgy, and after the connection, gaps are filled at the gaps of the connection through cold spraying copper powder, and then the step S4 is performed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211504695.8A CN115750711B (en) | 2022-11-28 | 2022-11-28 | High-precision ball nut and manufacturing process thereof |
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| CN202211504695.8A CN115750711B (en) | 2022-11-28 | 2022-11-28 | High-precision ball nut and manufacturing process thereof |
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| CN115750711A CN115750711A (en) | 2023-03-07 |
| CN115750711B true CN115750711B (en) | 2023-05-30 |
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