CN104723209B - Nut machining method - Google Patents
Nut machining method Download PDFInfo
- Publication number
- CN104723209B CN104723209B CN201310727138.7A CN201310727138A CN104723209B CN 104723209 B CN104723209 B CN 104723209B CN 201310727138 A CN201310727138 A CN 201310727138A CN 104723209 B CN104723209 B CN 104723209B
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- CN
- China
- Prior art keywords
- nut
- threaded portion
- ultraphotic
- processing method
- grinding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G9/00—Working screws, bolt heads, or nuts in conjunction with thread cutting, e.g. slotting screw heads or shanks, removing burrs from screw heads or shanks; Finishing, e.g. polishing, any screw-thread
- B23G9/005—Working nuts
- B23G9/008—Finishing nuts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G2210/00—Details of threads produced
- B23G2210/21—Threads in nuts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The invention discloses a nut machining method. The nut machining method includes the steps of providing a nut, wherein the nut is provided with an inner surface extending along a direction, and the inner surface is provided with a flat portion and a threaded portion; grinding the flat portion by a flat grinder; grinding the threaded portion by a forming grinder; rotating a super polishing part along the direction to extend into the inner side of the nut so as to grind the threaded portion. The nut machining method can enable the machined threaded portion to be higher in precision.
Description
Technical field
The present invention is with regard to a kind of processing method of nut.
Background technology
Ball screw is a kind of device being widely used in many plant equipment, and its purpose for arranging is to provide accurate
Transmission agency, the linear motion in mechanically actuated can be reached, and then the board or object of carrying is carried out in the straight direction
Start.Wherein, ball screw mainly includes screw rod, nut and multiple balls, and ball is placed in nut, and spiro cap is located at
Screw rod, makes nut and ball to move along a straight line relative to screw rod.
However, in the prior art, as shown in figure 1, the screw thread in order to grind a nut 2 so as to thread groove G have compared with
High precision and screw rod is smoothed out relative to the movement of nut 2, typically stretch into spiral shell using the forming grinding wheel 11 of forming grinding wheel machine
The inner side of cap 2, with the work being ground to thread groove G.But, when forming grinding wheel 11 is ground along thread groove G,
If forming grinding wheel 11 shakes, grinding precision will be caused to decline.Vibrations are likely to be because forming grinding wheel 11 is produced with nut 2
Contact and shake unavoidably, or be unable to maintain that the stablizing when rotated of forming grinding wheel 11 because pole 12 rigidity itself is not enough
The vibrations for being occurred, or when the angle theta between the direction D that the central shaft and the inner surface of nut 2 of pole 12 extend it is too big and
Produce with nut 2 and interfere derivative vibrations；Case above can all make grinding precision to meet demand.
Therefore, how a kind of processing method of nut is provided, can makes the threaded portion after attrition process that there is higher precision,
To meet using on to the demand of precision, it has also become one of important topic.
The content of the invention
Recognize above-mentioned problem, the purpose of the present invention is to provide a kind of threaded portion made after attrition process with higher
Precision, the processing method to meet the nut of the demand using on to precision.
To reach above-mentioned purpose, include according to a kind of processing method of nut of the present invention：Nut, wherein nut tool are provided
There is the inner surface for extending in one direction, inner surface has flat part and threaded portion；Flat part is ground by flat abrasive machine；
Threaded portion is ground by forming grinding wheel machine；And rotated along direction by ultraphotic part and stretch into nut inner side grinding threaded portion.
In one embodiment, the processing method of nut also includes：A kind of material is provided；Processing material, to form nut；
And heat cure process is carried out to nut.
In one embodiment, in the step of grinding threaded portion by ultraphotic part, also include：Nut is soaked in into grinding
In liquid.
In one embodiment, lapping liquid is uniformly mixed in medium including multiple abrasive grains.
In one embodiment, in the step of grinding threaded portion by ultraphotic part, during ultraphotic part grinding nut spiral shell is coordinated
The helical pitch of cap.
In one embodiment, in the step of grinding threaded portion by ultraphotic part, ultraphotic part has end and main part,
Breadth Maximum of the Breadth Maximum of end less than main part.
In one embodiment, end has top surface, and top surface has opening, and processing method also includes：By adjustment element
Ultraphotic part is screwed in by opening, to adjust the dimensional fits nut of main part by adjustment element.
In one embodiment, main part has external screw thread, in the step of grinding threaded portion by ultraphotic part, external screw thread
It is not directly contacted with threaded portion.
In one embodiment, in the step of grinding threaded portion by ultraphotic part, external screw thread is situated between with the gap of threaded portion
Between 0.05 millimeter to 1 millimeter.
In one embodiment, in the step of grinding threaded portion by ultraphotic part, the scope of the helical angle of threaded portion is 1
Spend between 50 degree.
From the above, because the processing method of the nut of the present invention includes：A kind of nut is provided, wherein nut has along one
The inner surface that direction extends, inner surface has flat part and threaded portion；Flat part is ground by flat abrasive machine；By shaping
Abrasive machine grinds threaded portion；And rotated along direction by ultraphotic part and stretch into nut inner side grinding threaded portion.Thus, with it is existing
Technology is compared, during due to grinding threaded portion using forming grinding wheel machine, although can carry out the grinding of threaded portion, but cannot make screw thread
The precision in portion reaches requirement, therefore, the present invention recycles ultraphotic part to rotate and stretch in nut along the bearing of trend of inner surface
During the grinding threaded portion of side, milling tool can be made not produce interference with nut, therefore have can the threaded portion after attrition process
Higher precision, to meet using on to the demand of precision.
Description of the drawings
Fig. 1 is a kind of a kind of attrition process schematic diagram of known nut.
Fig. 2 is a kind of process step schematic diagram of the processing method of nut of the preferred embodiment of the present invention.
Fig. 3 A are a kind of cross-sectional schematic of nut.
Fig. 3 B and Fig. 3 C are respectively a kind of process schematic diagram of nut of the preferred embodiment of the present invention.
Fig. 3 D are the enlarged diagram of the region A of Fig. 3 C.
Fig. 4 A and Fig. 4 B are respectively the ultraphotic part of Fig. 3 B and the schematic perspective view of adjustment element.
Specific embodiment
Hereinafter with reference to relevant drawings, the processing method according to the nut of the preferred embodiment of the present invention, wherein identical are illustrated
Element will be illustrated with identical reference marks.
Refer to shown in Fig. 2, Fig. 3 A to Fig. 3 D, wherein, Fig. 2 is a kind of processing side of nut of the preferred embodiment of the present invention
The process step schematic diagram of method, and Fig. 3 A are a kind of cross-sectional schematic of nut 2, it is preferred real that Fig. 3 B and Fig. 3 C is respectively the present invention
Apply the enlarged diagram of a kind of process schematic diagram of nut 2 of example, and Fig. 3 D for the region A of Fig. 3 C.
The processing method of the nut of the present invention can be applicable to nut of the helical angle between 1 degree to 50 degree.As illustrated,
The processing method of nut can be applicable to grind nut 2 so as to which precision is reached using upper requirement.As shown in Fig. 2 processing method bag
Step S01 is included to step S04.
First, as shown in Figure 3A, step S01 is：Nut 2 is provided, wherein nut 2 has the interior of D extensions in one direction
Side surface 21, and inner surface 21 has flat part 211 and threaded portion 212.Here, nut 2 is such as but not limited to applied to rolling
Pearl screw rod, and threaded portion 212 is continuous channel.In addition, bearing of trends of the direction D for the inner surface 21 of nut 2, and actually
On, flat part 211 and threaded portion 212 also extend along direction D.When the nut 2 for a strip, then direction D is nut 2
Long axis direction.
The acquirement of nut 2 can for example with turn-milling cutting or other technique (such as cast molding or forging molding) processing
Into.Wherein, can also be laggard in turn-milling cutting by a kind of material (or pan of a steelyard unit, material is, for example, metal, alloy or stainless steel etc.)
Row heat cure processes (thermal curing treatment) and obtains, to strengthen the hardness of formed nut 2.It is aforesaid
Heat cure process step may include flame hardening or high frequency induction mode, and the present invention is not limited.And, in nut 2
In the technique of acquirement, above-mentioned unaccounted other operation parts should be the technical staff in the technical field of the invention and can manage
Xie Zhe, repeats no more in this.
Then, step S02 is carried out：Flat part 211 is ground by flat abrasive machine.Here, being stretched along direction D using flat abrasive machine
Enter the inner side of nut 2 flat part 211 of inner surface 21 is ground to reach desired precision.Through the step of the external diameter grinding
After rapid process, the thermal deformation part for producing because of Surface hardening treatment originally also can be in the lump abraded.After the completion of grinding, nut will be made
2 inner surfaces 21 have certain a flatness and precision, and can simultaneously as the benchmark for subsequently grinding other parts,
Advantageously reduce tolerance when overall processing processing procedure and the assembling of follow-up finished product.For the means for realizing grinding are this
Technical staff in technical field that the present invention belongs to can be appreciated, and will not be described here.
Then, step S03 is carried out：Threaded portion 212 is ground by forming grinding wheel machine.Here, such as forming grinding wheel machine is to spiral shell
Line portion 212 is ground.Wherein, due to helical angle it is larger when, the pole 12 of abrasive machine can and nut 2 produce partial coherence, because
When this should be replaced with the pole 12 of small diameter, although can be ground, but can only roughly grind at last, it is impossible to make threaded portion 212
Precision reach using upper requirement.
Therefore, step S04 need to be carried out：The inner side of nut 2 grinding threaded portion is rotated and stretches into along direction D by ultraphotic part 3
212.Here, the grinding order of the threaded portion 212 of the grinding of the flat part 211 of step S02 and step S03, S04 has no especially limit
System, can first grind grind again behind flat part 211 threaded portion 212, or first grinds threaded portion 212 and reach and ground again after the requirement of precision
Mill flat part 211.
In the present embodiment, as shown in Fig. 3 B and Fig. 3 C, after roughly grinding to threaded portion 212, in order that threaded portion
212 reach required precision, before step S04 is carried out with ultraphotic part grinding threaded portion 212, need first nut 2 to be soaked in into grinding
It is in liquid L and fixed.Wherein, lapping liquid L can pass through static or flowing grinding in addition to the effect for providing grinding and lubricating, also
Liquid L provides the approach (certainly, the radiating effect of flow-ground liquid L is preferable) of radiating when grinding.In addition, as shown in Figure 3 D, grind
Grinding fluid L may include that multiple abrasive grain L1 are uniformly mixed in medium L2, and it is a kind of with excellent chemical and mechanical performance
Grinding liquid.Medium L2 can be cutting fluid, such as turkey red oil, and abrasive grain L1 for example can be monocrystalline diamond particle, polycrystalline
Diamond grains or nm diamond grains, or the material that other hardness are higher, are used using the grinding as precision metallic and polishing.
Referring again to shown in Fig. 3 B and Fig. 3 C, ultraphotic part 3 has end 31, main part 32 and afterbody 33, and main part 32 has
There is external screw thread 321 (main part 32 is the part that external screw thread 321 is included in ultraphotic part 3).In grinding, afterbody 33 can be by chuck
Part 4 is clamped, and is driven by such as motor (figure does not show) and rotated, to refine threaded portion by the external screw thread 321 of main part 32
212.Wherein, ultraphotic part 3 along direction D move, and coordinate nut 2 helical pitch (1ead, refer to nut 2 rotation turn around what is advanced
Distance), rotate, while move in and out nut 2 with moving back and forth, with grinding reach threaded portion 212 required
Precision.Due to rotating and stretching into the inner side of nut 2 grinding threaded portion 212 along direction D using ultraphotic part 3, therefore ultraphotic part 3 will not be with
Nut 2 produces interference, therefore can grind the nut 2 with high helical angle.
In addition, as shown in Figure 3 D, during the grinding of ultraphotic part 3 threaded portion 212, on the main part 32 of ultraphotic part 3
External screw thread 321 is not directly contacted with the threaded portion 212 of nut 2, and the gap between external screw thread 321 and threaded portion 212
Can for example between 0.05 millimeter to 1 millimeter.It is by wide change because ultraphotic part 3 has along main part 32 to the direction of end 31
(the most long external diameter i.e. on the radial section of ultraphotic part 3 gradually becomes narrow lead angle configuration along main part 32 to the direction of end 31
It is little), therefore when ultraphotic part 3 stretches into 2 inner side of nut, the less end 31 of width can make lapping liquid L enter wider main part
When 32, retain the region that more lapping liquid L is located in main part 32, make in the gap between external screw thread 321 and threaded portion 212
Lapping liquid L can be filled up, then the rotation by ultraphotic part 3, movement can drive abrasive grain L1 to be ground threaded portion 212, make
The surface roughness (Ra) of threaded portion 212 at least can reach 0.1 micron (μm).
In addition, refer to shown in Fig. 4 A and Fig. 4 B, to further illustrate the structure of the ultraphotic part 3 that the present embodiment is used,
And the relation of ultraphotic part 3 and adjustment element 5.Wherein, Fig. 4 A and Fig. 4 B are respectively the ultraphotic part of Fig. 3 B and standing for adjustment element 5
Body schematic diagram.
As shown in Figure 4 A, ultraphotic part 3 can be cylindric, and the Breadth Maximum of its afterbody 33 is smaller than the maximum width of main part 32
Degree, and one end of main part 32 is connected to afterbody 33, and the other end of main part 32 is connected to end 31.In addition, end 31 has
There is top surface 311, top surface 311 has opening O (referred to here as cross recess).Wherein, the Breadth Maximum of end 31 is less than main part
32 Breadth Maximum.That is, the diameter of section of the ultraphotic part 3 of the present embodiment become larger by less end 31 (can be oblique
Change it is big or have the change of arc big), and in main part 32 a diameter of maximum.
But, it is worth mentioning at this point that, as shown in Figure 4 B, in order that ultraphotic part 3 is applicable to various sizes of nut 2, example
When being such as applied to grind the nut 2 of large-size, before the grinding, the processing method of the present invention may also include：By adjusting unit
Part 5 (such as screw) is screwed in ultraphotic part 3, to adjust (expansion) main part 32 by adjustment element 5 by the opening O of top surface 311
Size, to coordinate and suitable for the nut 2 of large-size.
In sum, because the processing method of the nut of the present invention includes：Nut is provided, wherein nut has in one direction
The inner surface of extension, inner surface has flat part and threaded portion；Flat part is ground by flat abrasive machine；By forming grinding wheel
Machine grinds threaded portion；And rotated along direction by ultraphotic part and stretch into nut inner side grinding threaded portion.Thus, with prior art
Compare, during due to grinding threaded portion using forming grinding wheel machine, although the grinding of threaded portion can be carried out, but threaded portion cannot be made
Precision reaches requirement, therefore, the present invention recycles ultraphotic part to rotate and stretch into nut inner side along the bearing of trend of inner surface and grinds
During thread grinding portion, milling tool can be made not produce interference with nut, therefore it is higher to have can the threaded portion after attrition process
Precision, to meet using on to the demand of precision.
The foregoing is only illustrative, rather than for restricted.It is any without departing from spirit and scope of the invention, and it is entered
Capable equivalent modifications or change, all should be included in claim.
Claims (9)
1. a kind of processing method of nut, including：
Nut is provided, wherein the nut has the inner surface for extending in one direction, the inner surface has flat part
And threaded portion；
The flat part is ground by flat abrasive machine；
The threaded portion is ground by forming grinding wheel machine；
The nut is soaked in lapping liquid；And
The grinding threaded portion in the nut inner side is rotated and stretches into along the direction by ultraphotic part.
2. the processing method of nut as claimed in claim 1, also includes：
A kind of material is provided；
The material is processed, to form the nut；And
Heat cure process is carried out to the nut.
3. the processing method of nut as claimed in claim 1, wherein the lapping liquid uniformly mixes including multiple abrasive grains
In medium.
4. the processing method of nut as claimed in claim 1, wherein in the step that the threaded portion is ground by the ultraphotic part
In rapid, the ultraphotic part coordinates the helical pitch of the nut when grinding the nut.
5. the processing method of nut as claimed in claim 1, wherein in the step that the threaded portion is ground by the ultraphotic part
In rapid, the ultraphotic part has end and main part, and the Breadth Maximum of the end is less than the Breadth Maximum of the main part.
6. the processing method of nut as claimed in claim 5, wherein the end has top surface, the top surface has opening,
The processing method also includes：
The ultraphotic part is screwed in by the opening by adjustment element, to adjust the chi of the main part by the adjustment element
It is very little to coordinate the nut.
7. the processing method of nut as claimed in claim 5, wherein the main part has external screw thread, is passing through the ultraphotic
In the step of part grinds the threaded portion, the external screw thread is not directly contacted with the threaded portion.
8. the processing method of nut as claimed in claim 7, wherein in the step that the threaded portion is ground by the ultraphotic part
In rapid, the gap of the external screw thread and the threaded portion is between 0.05 millimeter to 1 millimeter.
9. the processing method of nut as claimed in claim 1, wherein in the step that the threaded portion is ground by the ultraphotic part
In rapid, the scope of the helical angle of the threaded portion is 1 degree to 50 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310727138.7A CN104723209B (en) | 2013-12-18 | 2013-12-18 | Nut machining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310727138.7A CN104723209B (en) | 2013-12-18 | 2013-12-18 | Nut machining method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104723209A CN104723209A (en) | 2015-06-24 |
| CN104723209B true CN104723209B (en) | 2017-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310727138.7A Active CN104723209B (en) | 2013-12-18 | 2013-12-18 | Nut machining method |
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| Country | Link |
|---|---|
| CN (1) | CN104723209B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109202547B (en) * | 2018-10-10 | 2020-11-03 | 哈尔滨工业大学 | Grinding wheel grinding method for grinding parallel shaft of internal thread with large length-diameter ratio |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1260259A (en) * | 1998-09-11 | 2000-07-19 | Thk株式会社 | Ball-screw nut and making method thereof, linear guiding device and ball-screw for turning |
| JP2002292520A (en) * | 2001-01-23 | 2002-10-08 | Senjo Seiki Kk | Lapping machine and it's operating method |
| CN1849471A (en) * | 2003-09-11 | 2006-10-18 | Ntn株式会社 | Ball screw nut and method of producing the same |
| CN101020298A (en) * | 2007-03-13 | 2007-08-22 | 山东大学 | Process of grinding nut rolling way in great lead ball lead screw pair |
| CN103429381A (en) * | 2010-08-04 | 2013-12-04 | 日本精工株式会社 | Ball screw and method for manufacturing ball screw nut |
-
2013
- 2013-12-18 CN CN201310727138.7A patent/CN104723209B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1260259A (en) * | 1998-09-11 | 2000-07-19 | Thk株式会社 | Ball-screw nut and making method thereof, linear guiding device and ball-screw for turning |
| JP2002292520A (en) * | 2001-01-23 | 2002-10-08 | Senjo Seiki Kk | Lapping machine and it's operating method |
| CN1849471A (en) * | 2003-09-11 | 2006-10-18 | Ntn株式会社 | Ball screw nut and method of producing the same |
| CN101020298A (en) * | 2007-03-13 | 2007-08-22 | 山东大学 | Process of grinding nut rolling way in great lead ball lead screw pair |
| CN103429381A (en) * | 2010-08-04 | 2013-12-04 | 日本精工株式会社 | Ball screw and method for manufacturing ball screw nut |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104723209A (en) | 2015-06-24 |
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