CN202123401U - Screw inner bore grinding device for automobile steering device - Google Patents
Screw inner bore grinding device for automobile steering device Download PDFInfo
- Publication number
- CN202123401U CN202123401U CN2011201813805U CN201120181380U CN202123401U CN 202123401 U CN202123401 U CN 202123401U CN 2011201813805 U CN2011201813805 U CN 2011201813805U CN 201120181380 U CN201120181380 U CN 201120181380U CN 202123401 U CN202123401 U CN 202123401U
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- Prior art keywords
- grinding
- grinding wheel
- utility
- inner bore
- cylindricity
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- 229910001651 emery Inorganic materials 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 4
- 230000007547 defect Effects 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 7
- 238000002271 resection Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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Abstract
The utility model discloses a screw inner bore grinding device for an automobile steering device. The utility model overcomes the defect of poor cylindricity of the current grinding devices and provides a screw inner hole grinding device with good grinding efficiency and high cylindricity. Particularly, two grinding wheels are horizontally fixed on the power output end of a grinding wheel shaft through central holes; a shaft sleeve is clamped between the grinding wheels, wherein the outside grinding wheel is tightly fastened on the grinding wheel shaft through a bolt; and the inside grinding wheel is tightly clung onto a protruding fixture block of the grinding wheel shaft. As the two grinding wheels are combined for grinding the screw inner bore, the change of contact length between the grinding wheel and a workpiece is low; therefore, the change of the actual normal grinding force is also reduced, and the cylindricity of the inner bore is improved and can achieve about 0.002m.
Description
Technical field
The utility model relates to a kind of grinding attachment, belongs to screw rod internal control processing technique field.
Background technology
Automobile steering device screw rod diameter of bore is 26-32mm, interior hole depth 45-60mm, endoporus cylindricity 0.0025mm; Inner bore surface roughness Ra0.2 m, its fine finishining is one of current technological difficulties, and is main because bore area has six long grooves (shown in Figure 1; Screw rod 1; Screw rod internal control 2, groove 3), form intermittently surface of endoporus.Existing process program adopts plain grinding machine internal (traditional cylindrical grinding wheel is set) to carry out semifinishing (shown in Figure 2) more; Reach the final precision of endoporus through hand lapping at last; The grinding attachment that is adopted is as shown in Figure 2, and wherein the center of cylindrical grinding wheel 41 ' is fixed on the grinding wheel spindle 43 ' through screw 42 '.Its shortcoming is that cylindricity is poor, and processing can only reach 0.008mm on plain grinding machine internal, and labour intensity is big, and production efficiency is low, and owing to be blind hole, grinds also instability of back quality.
The utility model content
The technical problem that the utility model will solve is the defective that overcomes existing grinding attachment cylindricity difference, provides a kind of grinding efficiency good, the screw rod internal control grinding attachment that cylindricity is high.
In order to solve the problems of the technologies described above, the utility model provides following technical scheme:
Two emery wheels pass through the centre bore horizontal fixed in the clutch end of grinding wheel spindle, and clamping between the emery wheel has axle sleeve, and wherein the emery wheel in the outside is fastened on the grinding wheel spindle, and inboard emery wheel is close on the fixture block of grinding wheel spindle upper process.
Said grinding wheel width is 6mm.
Between said emery wheel and the axle sleeve, and be provided with pad between emery wheel and the fixture block.
In the internal grinding, the factor that influences screw rod endoporus cylindricity is more; The endoporus of grinding continuous surface, the endoporus cylindricity depends mainly on machine tool accuracy, but the endoporus on the interrupted surface of grinding even if be the high accuracy internal grinder, also is difficult to grind qualified screw rod endoporus.This is because according to Principle of Grinding and Cutting, the endoporus accurate grinding at first guarantees the metal resection rate that equates.Obviously, the metal resection rate of endoporus circumference is different, just can not guarantee the form accuracy of endoporus; The longitudinal cross-section that the metal resection rate is big, diameter of bore is big, and opposite diameter of bore is little.Metal resection rate and normal force grinding are linear relationship, and promptly normal grinding force is big, and the metal resection rate is high, otherwise the metal resection rate is low.Actual normal grinding force=FN* (contact length of emery wheel and workpiece), FN is every centimetre a grinding force.Because the contact length of grinding process medium plain emery wheel and workpiece changes; The contact length of reeded longitudinal cross-section emery wheel and workpiece is short; Unnotched longitudinal cross-section contacts with the emery wheel overall with; This length variable effect actual normal grinding force and is changed, thereby influences the variation of metal resection rate, thereby has influence on the endoporus cylindricity.
Adopt the described two emery wheels combination of the utility model grinding screw rod endoporus, the contact length of emery wheel and workpiece changes little, and actual normal grinding force changes and also reduces thereupon, thereby improves endoporus cylinder precision, can reach about 0.002mm.
Description of drawings
Accompanying drawing is used to provide the further understanding to the utility model, and constitutes the part of specification, is used to explain the utility model with the embodiment of the utility model, does not constitute the restriction to the utility model.In the accompanying drawings:
Fig. 1 is the structural representation of automobile steering device screw rod endoporus;
Fig. 2 is the grinding view of existing grinding attachment;
Fig. 3 is the grinding view of the utility model grinding attachment;
Fig. 4 is the structural representation of the utility model grinding attachment.
The specific embodiment
Describe below in conjunction with the preferred embodiment of accompanying drawing, should be appreciated that preferred embodiment described herein only is used for explanation and explains the utility model, and be not used in qualification the utility model the utility model.
Embodiment 1
Like Fig. 3, shown in Figure 4; The screw rod inner hole grinding device of automobile steering device; Two emery wheels 41 pass through the centre bore horizontal fixed in the clutch end of grinding wheel spindle 43; Tightly be provided with axle sleeve 44 between the emery wheel 41, wherein the emery wheel 41 in the outside is fastened on the grinding wheel spindle 43 through screw 42, and inboard emery wheel 41 is close on the fixture block of grinding wheel spindle 43 projections.Between emery wheel and the axle sleeve, and be equipped with pad (figure does not show) between emery wheel and the fixture block.
Like Fig. 3, Fig. 4, grinding wheel width is 6mm, adopts the grinding attachment of two emery wheel combinations of polishing width 6mm, beam overall 28mm; During grinding screw rod endoporus, the contact length of emery wheel and workpiece is changed to 6mm, promptly the wideest contact length 12mm; The narrowest 6mm (Fig. 3 is visible, and groove length is 22mm, equal sleeve length and a slice grinding wheel width and); Press FN=5kg/cm and calculate, actual normal grinding force changes from 6kg-3kg.Compare, if with width 28mm cylindrical grinding wheel grinding attachment, the contact length of emery wheel and workpiece changes from 28mm-6mm, and the variation of actual normal grinding force differs 4.6 times from 14kg-3kg.Can know that by aforementioned formula this actual grinding force variation directly has influence on the endoporus form accuracy.Under the identical situation of other conditions, use the cylindrical grinding wheel grinding attachment at machine tool accuracy, the cylindricity of screw rod endoporus is merely 0.008mm, and with two emery wheel combined grinding machines of width 6mm, the endoporus cylindricity can reach 0.002mm.
What should explain at last is: the above is merely the preferred embodiment of the utility model; Be not limited to the utility model; Although the utility model has been carried out detailed explanation with reference to previous embodiment; For a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (3)
1. the screw rod inner hole grinding device of automobile steering device; It is characterized in that: two emery wheels pass through the centre bore horizontal fixed in the clutch end of grinding wheel spindle; Clamping between the emery wheel has axle sleeve, and wherein the emery wheel in the outside is fastened on the grinding wheel spindle, and inboard emery wheel is close on the fixture block of grinding wheel spindle upper process.
2. the screw rod inner hole grinding device of automobile steering device according to claim 1, it is characterized in that: said grinding wheel width is 6mm.
3. the screw rod inner hole grinding device of automobile steering device according to claim 1 and 2 is characterized in that: between said emery wheel and the axle sleeve, and be provided with pad between emery wheel and the fixture block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201813805U CN202123401U (en) | 2011-05-31 | 2011-05-31 | Screw inner bore grinding device for automobile steering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201813805U CN202123401U (en) | 2011-05-31 | 2011-05-31 | Screw inner bore grinding device for automobile steering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202123401U true CN202123401U (en) | 2012-01-25 |
Family
ID=45486472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201813805U Expired - Fee Related CN202123401U (en) | 2011-05-31 | 2011-05-31 | Screw inner bore grinding device for automobile steering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202123401U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104325368A (en) * | 2014-10-24 | 2015-02-04 | 嘉善五洲无油轴承有限公司 | Miniature hole grinding mechanism |
| CN108818175A (en) * | 2018-05-31 | 2018-11-16 | 常州机电职业技术学院 | Deep hole grinding device and preparation method thereof |
-
2011
- 2011-05-31 CN CN2011201813805U patent/CN202123401U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104325368A (en) * | 2014-10-24 | 2015-02-04 | 嘉善五洲无油轴承有限公司 | Miniature hole grinding mechanism |
| CN108818175A (en) * | 2018-05-31 | 2018-11-16 | 常州机电职业技术学院 | Deep hole grinding device and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120125 Termination date: 20140531 |